阅读说明：本技术 用于远程干扰管理的资源速率匹配 (Resource rate matching for remote interference management ) 是由 Y.任 S.霍塞尼 H.徐 N.布尚 J.K.桑达拉拉詹 Y.托克戈兹 J.B.索里亚加 于 2019-08-14 设计创作，主要内容包括：本公开的各个方面通常涉及无线通信。在一些方面,第一基站(BS)可以检测对与第一BS相关联的物理上行链路共享信道(PUSCH)上的一个或多个上行链路通信的远程干扰,该远程干扰是由第二BS发送的一个或多个参考信号(RS)通信的传播引起的,由于一个或多个RS通信的反射,该一个或多个RS通信离开第二BS的覆盖区域并进入第一BS的覆盖区域。第一BS的覆盖区域和第二BS的覆盖区域是不重叠的覆盖区域。第一BS可以至少部分地基于检测到远程干扰来调整与第一BS相关联的PUSCH的一个或多个无线电资源分配。提供了许多其他方面。(Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a first Base Station (BS) may detect remote interference to one or more uplink communications on a Physical Uplink Shared Channel (PUSCH) associated with the first BS, the remote interference caused by propagation of one or more Reference Signal (RS) communications transmitted by a second BS, the one or more RS communications exiting a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications. The coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas. The first BS may adjust one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference. Numerous other aspects are provided.)

1. A method of wireless communication performed by a first base station, BS, comprising:

detecting remote interference to one or more uplink communications on a physical uplink shared channel, PUSCH, associated with the first BS, the remote interference being caused by propagation of one or more reference signal, RS, communications transmitted by a second BS, the one or more RS communications leaving a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications,

wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and

adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference.

2. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

determining one or more radio resources associated with the first BS for which the one or more RS communications are remotely interfering; and

refraining from using the one or more radio resources for uplink communication on the PUSCH.

3. The method of claim 2, wherein the one or more radio resources comprise:

one or more resource blocks associated with the first BS.

4. The method of claim 2, wherein refraining from using the one or more radio resources for uplink communication on the PUSCH comprises:

transmitting, to one or more user equipments, UEs, in a coverage area of the first BS, at least one of:

rate matching bitmap-1 instructions for refraining from using the one or more radio resources for uplink communication on the PUSCH,

rate matching bitmap-2 instructions to refrain from using the one or more radio resources for uplink communication on the PUSCH, or

Rate matching bitmap-3 instructions for refraining from using the one or more radio resources for uplink communication on the PUSCH.

5. The method of claim 1, further comprising:

receiving scheduling information associated with transmission of the one or more RS communications; and

wherein adjusting the one or more radio resource allocations comprises:

refrain from using one or more radio resources associated with the first BS for uplink communication on the PUSCH based at least in part on the scheduling information,

wherein the one or more radio resources overlap with transmissions of the one or more RS communications.

6. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

transmitting configuration information associated with the one or more radio resource allocations to one or more User Equipments (UEs) in a coverage area of the first BS,

wherein the configuration information is for configuring the one or more UEs to transmit one or more zero-power channel state information reference signals, CSI-RSs.

7. The method of claim 6, wherein transmitting configuration information associated with the one or more radio resource allocations comprises at least one of:

periodically transmitting the configuration information, or

The configuration information is transmitted semi-periodically.

8. The method of claim 1, wherein detecting remote interference to the one or more uplink communications comprises:

receiving an RS communication sequence sent by the second BS; and

detecting the remote interference based at least in part on receiving the RS communication sequence.

9. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

determining a number of resource block symbols associated with the one or more uplink communications;

determining whether the number of resource block symbols meets a threshold number of resource block symbols; and

refraining from using one or more resource elements associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols satisfies a threshold number of resource block symbols.

10. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

determining a number of resource block symbols associated with the one or more uplink communications;

determining whether the number of resource block symbols meets a threshold number of resource block symbols; and

refraining from using one or more resource blocks associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols does not satisfy the threshold number of resource block symbols.

11. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

determining a signal strength of the one or more RS communications;

determining whether the signal strength satisfies a threshold signal strength; and

refraining from using one or more resource elements for uplink communication on the PUSCH based at least in part on determining that the signal strength satisfies the threshold signal strength.

12. The method of claim 1, wherein adjusting the one or more radio resource allocations comprises:

determining a signal strength of the one or more RS communications;

determining whether the signal strength satisfies a threshold signal strength; and

refraining from using one or more resource blocks for uplink communication on the PUSCH based at least in part on determining that the signal strength does not satisfy the threshold signal strength.

13. A method of wireless communication performed by a base station, BS, comprising:

determining to transmit one or more remote interference management reference signal, RIM, RS, communications;

determining that transmission of the one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications;

reserving one or more radio resources for transmitting the one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will cause interference to transmission of the one or more downlink communications,

wherein the BS is to refrain from transmitting the one or more downlink communications using the one or more radio resources; and

transmitting the one or more RIM RS communications using the one or more radio resources.

14. The method of claim 13, wherein the one or more radio resources comprise at least one of:

one or more resource blocks associated with the BS, or

One or more resource elements associated with the BS.

15. The method of claim 13, further comprising:

receiving scheduling information associated with transmission of the one or more RIM RS communications; and

wherein reserving the one or more radio resources comprises:

reserving one or more resource elements associated with the BS based on receiving the scheduling information.

16. A first base station, BS, for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

detecting remote interference to one or more uplink communications on a physical uplink shared channel, PUSCH, associated with the first BS, the remote interference being caused by propagation of one or more reference signal, RS, communications transmitted by a second BS, the one or more RS communications leaving a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications,

wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and

adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference.

17. The first BS of claim 16, wherein when adjusting the one or more radio resource allocations, the one or more processors are configured to:

determining one or more radio resources associated with the first BS for which the one or more RS communications are remotely interfering; and

refraining from using the one or more radio resources for uplink communication on the PUSCH.

18. The first BS of claim 17, wherein the one or more radio resources comprise:

one or more resource blocks associated with the first BS.

19. The first BS of claim 17, wherein, when avoiding use of the one or more radio resources for uplink communication on the PUSCH, the one or more processors are configured to:

transmitting, to one or more user equipments, UEs, in a coverage area of the first BS, at least one of:

rate matching bitmap-1 instructions for refraining from using the one or more radio resources for uplink communication on the PUSCH,

rate matching bitmap-2 instructions to refrain from using the one or more radio resources for uplink communication on the PUSCH, or

Rate matching bitmap-3 instructions for refraining from using the one or more radio resources for uplink communication on the PUSCH.

20. The first BS of claim 16, wherein the one or more processors are further configured to:

receiving scheduling information associated with transmission of the one or more RS communications; and

wherein when adjusting the one or more radio resource allocations, the one or more processors are configured to:

refrain from using one or more radio resources associated with the first BS for uplink communication on the PUSCH based at least in part on the scheduling information,

wherein the one or more radio resources overlap with transmissions of the one or more RS communications.

21. The first BS of claim 16, wherein when adjusting the one or more radio resource allocations, the one or more processors are configured to:

transmitting configuration information associated with the one or more radio resource allocations to one or more User Equipments (UEs) in a coverage area of the first BS,

wherein the configuration information is for configuring the one or more UEs to transmit one or more zero-power channel state information reference signals, CSI-RSs.

22. The first BS of claim 21, wherein when transmitting configuration information associated with the one or more radio resource allocations, the one or more processors are configured to at least one of:

periodically transmitting the configuration information, or

The configuration information is transmitted semi-periodically.

23. The first BS of claim 16, wherein, when remote interference to the one or more uplink communications is detected, the one or more processors are configured to:

receiving an RS communication sequence sent by the second base station; and

detecting the remote interference based at least in part on receiving the RS communication sequence.

24. The first BS of claim 16, wherein when adjusting the one or more radio resource allocations, the one or more processors are configured to:

determining a number of resource block symbols associated with the one or more uplink communications;

determining whether the number of resource block symbols meets a threshold number of resource block symbols; and

refraining from using one or more resource elements associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols satisfies a threshold number of resource block symbols.

25. The first BS of claim 16, wherein when adjusting one or more radio resource allocations, the one or more processors are configured to:

determining a number of resource block symbols associated with the one or more uplink communications;

determining whether the number of resource block symbols meets a threshold number of resource block symbols; and

refraining from using one or more resource blocks associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols does not satisfy the threshold number of resource block symbols.

26. The first BS of claim 16, wherein when adjusting one or more radio resource allocations, the one or more processors are configured to:

determining a signal strength of the one or more RS communications;

determining whether the signal strength satisfies a threshold signal strength; and

refraining from using one or more resource elements for uplink communication on the PUSCH based at least in part on determining that the signal strength satisfies the threshold signal strength.

27. The first BS of claim 16, wherein when adjusting one or more radio resource allocations, the one or more processors are configured to:

determining a signal strength of the one or more RS communications;

determining whether the signal strength satisfies a threshold signal strength; and

refraining from using one or more resource blocks for uplink communication on the PUSCH based at least in part on determining that the signal strength does not satisfy the threshold signal strength.

28. A base station, BS, for wireless communication, comprising:

a memory; and

one or more processors operatively coupled to the memory, the memory and the one or more processors configured to:

determining to transmit one or more remote interference management reference signal, RIM, RS, communications;

determining that transmission of the one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications;

reserving one or more radio resources for transmitting the one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will cause interference to transmission of the one or more downlink communications,

wherein the BS is to refrain from transmitting the one or more downlink communications using the one or more radio resources; and

transmitting the one or more RIM RS communications using the one or more radio resources.

29. The BS of claim 28, wherein the one or more radio resources comprise at least one of:

one or more resource blocks associated with the BS, or

One or more resource elements associated with the BS.

30. The BS of claim 28, wherein the one or more processors are further configured to:

receiving scheduling information associated with transmission of the one or more RIM RS communications; and

wherein, when reserving the one or more radio resources, the one or more processors are configured to:

reserving one or more resource elements associated with the BS based on receiving the scheduling information.

Technical Field

Various aspects of the present disclosure generally relate to techniques and apparatus for wireless communication and resource rate matching for remote interference management.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. A typical wireless communication system may employ multiple-access techniques capable of supporting communication with multiple users by sharing the available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access techniques include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the third Generation partnership project (3 GPP).

A wireless communication network may include multiple Base Stations (BSs) that may support communication for multiple User Equipments (UEs). A User Equipment (UE) may communicate with a Base Station (BS) via a downlink and an uplink. The downlink (or forward link) refers to the communication link from the BS to the UE, and the uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in greater detail herein, a BS may be referred to as a node B, gNB, an Access Point (AP), a radio head, a Transmit Receive Point (TRP), a New Radio (NR) BS, a 5G node B, etc.

The above multiple access techniques have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate on a municipal, national, regional, or even global level. A New Radio (NR), which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the third generation partnership project (3 GPP). NR aims to better support mobile broadband internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, better integrating with other open standards using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the Downlink (DL), using CP-OFDM and/or SC-FDM (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)) on the Uplink (UL), and supporting beamforming, Multiple Input Multiple Output (MIMO) antenna techniques and carrier aggregation. However, as the demand for mobile broadband access continues to increase, there is a need for further improvements in LTE and NR technologies. Preferably, these improvements should be applicable to other multiple access techniques and telecommunications standards employing these techniques.

Disclosure of Invention

In some aspects, a method of wireless communication performed by a first Base Station (BS) may comprise: detecting remote interference to one or more uplink communications on a Physical Uplink Shared Channel (PUSCH) associated with a first BS, the remote interference caused by propagation of one or more Reference Signal (RS) communications transmitted by a second BS, the one or more RS communications exiting a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications, wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference.

In some aspects, a first BS for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to detect remote interference to one or more uplink communications on a PUSCH associated with a first BS, the remote interference caused by propagation of one or more RS communications transmitted by a second BS, the one or more RS communications exiting a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications, wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. When executed by one or more processors of a first BS, the one or more instructions may cause the one or more processors to detect remote interference to one or more uplink communications on a PUSCH associated with the first BS, the remote interference caused by propagation of one or more RS communications transmitted by a second BS, the one or more RS communications exiting a coverage area of the second BS and entering a coverage area of the first BS due to reflections of the one or more RS communications, wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference.

In some aspects, a first apparatus for wireless communication may comprise: means for detecting remote interference to one or more uplink communications on a PUSCH associated with a first apparatus, the remote interference caused by propagation of one or more RS communications transmitted by a second apparatus, the one or more RS communications exiting a coverage area of the second apparatus and entering a coverage area of the first apparatus due to reflections of the one or more RS communications, wherein the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas; and means for adjusting one or more radio resource allocations of a PUSCH associated with the first apparatus based at least in part on detecting the remote interference.

In some aspects, a method of wireless communication performed by a BS may comprise: determining to transmit one or more remote interference management reference signal (RIM RS) communications; determining that transmission of the one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications; reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein the BS is to refrain from transmitting the one or more downlink communications using the one or more radio resources; and transmitting one or more RIM RS communications using the one or more radio resources.

In some aspects, a BS for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to: determining to transmit one or more RIM RS communications; determining that transmission of one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications; reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein the BS is to refrain from transmitting the one or more downlink communications using the one or more radio resources; one or more RIM RS communications are transmitted using one or more radio resources.

In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by the one or more processors of the BS, may cause the one or more processors to: determining to transmit one or more RIM RS communications; determining that transmission of the one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications; reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein the BS is to refrain from transmitting the one or more downlink communications using the one or more radio resources; and transmitting one or more RIM RS communications using the one or more radio resources.

In some aspects, an apparatus for wireless communication may comprise: means for determining to transmit one or more RIM RS communications; means for determining that transmission of one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications; means for reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein the apparatus is to refrain from transmitting the one or more downlink communications using the one or more radio resources; and means for transmitting one or more RIM RS communications using the one or more radio resources.

Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and processing systems as substantially described herein with reference to and as illustrated by the accompanying drawings and description.

The foregoing has outlined rather broadly the features and technical advantages of examples according to the present disclosure in order that the detailed description that follows may be better understood. Additional features and advantages will be described hereinafter. The conception and specific examples disclosed may be readily utilized as a basis for modifying or designing other structures for carrying out the same purposes of the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The features of the concepts disclosed herein, their organization and method of operation, and related advantages will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purpose of illustration and description and is not intended as a definition of the limits of the claims.

Drawings

So that the manner in which the above recited features of the present disclosure can be understood in detail, a more particular description of the disclosure, briefly summarized above, may be had by reference to aspects, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawings illustrate only certain typical aspects of this disclosure and are therefore not to be considered limiting of its scope, for the description may admit to other equally effective aspects. The same reference numbers in different drawings may identify the same or similar elements.

Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network in accordance with various aspects of the present disclosure.

Fig. 2 is a block diagram conceptually illustrating an example of a Base Station (BS) communicating with a User Equipment (UE) in a wireless communication network, in accordance with various aspects of the present disclosure.

Fig. 3A is a block diagram conceptually illustrating an example of a frame structure in a wireless communication network, in accordance with various aspects of the present disclosure.

Fig. 3B is a block diagram conceptually illustrating an example synchronous communication hierarchy in a wireless communication network, in accordance with various aspects of the present disclosure.

Fig. 4 is a block diagram conceptually illustrating an example slot format with a normal cyclic prefix, in accordance with various aspects of the present disclosure.

Fig. 5 illustrates an example logical architecture of a distributed Radio Access Network (RAN) in accordance with various aspects of the present disclosure.

Fig. 6 illustrates an example physical architecture of a distributed RAN in accordance with various aspects of the present disclosure.

Fig. 7A-7C are diagrams illustrating examples of resource rate matching for remote interference management, in accordance with various aspects of the present disclosure.

Fig. 8 is a diagram illustrating an example process performed, for example, by a BS, in accordance with various aspects of the present disclosure.

Fig. 9 is a diagram illustrating an example process performed, for example, by a BS, in accordance with various aspects of the present disclosure.

Detailed Description

Various aspects of the disclosure are described more fully hereinafter with reference to the accompanying drawings. This disclosure may, however, be embodied in many different forms and should not be construed as limited to any specific structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Based on the teachings herein one skilled in the art should appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether implemented independently of or combined with any other aspect of the present disclosure. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. In addition, the scope of the present disclosure is intended to cover such apparatus or methods as may be practiced using other structure, functionality, or structure and functionality in addition to or other than the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein may be embodied by one or more elements of a claim.

Several aspects of a telecommunications system will now be presented with reference to various apparatus and techniques. These apparatus and techniques are described in the following detailed description and are illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, procedures, algorithms, etc. (collectively referred to as "elements"). These elements may be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends upon the particular application and design constraints imposed on the overall system.

It should be noted that although the various aspects may be described herein using terms commonly associated with 3G and/or 4G wireless technologies, the various aspects of the disclosure may be applied in other generation-based communication systems, such as 5G and higher versions, including NR technologies.

Fig. 1 is a diagram illustrating a network 100 in which various aspects of the present disclosure may be practiced. The network 100 may be an LTE network or some other wireless network, such as a 5G or NR network. Wireless network 100 may include a plurality of BSs 110 (shown as BS110 a, BS110b, BS110 c, and BS110 d) and other network entities. A BS is an entity that communicates with User Equipment (UE) and may also be referred to as a base station, NR BS, node B, gNB, 5G node b (nb), access point, Transmission Reception Point (TRP), etc. Each BS may provide communication coverage for a particular geographic area. In 3GPP, the term "cell" can refer to the coverage of a BS and/or a BS subsystem serving that coverage, depending on the context in which the term is used.

A BS may provide communication coverage for a macrocell, a picocell, a femtocell, and/or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unlimited access for UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unlimited access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow limited access by UEs associated with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG)). The BS for the macro cell may be referred to as a macro BS. The BS for the pico cell may be referred to as a pico BS. The BS of the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BS110 a may be a macro BS for macro cell 102a, BS110b may be a pico BS for pico cell 102b, and BS110 c may be a femto BS for femto cell 102 c. A BS may support one or more (e.g., three) cells. The terms "eNB", "base station", "NR BS", "gNB", "TRP", "AP", "node B", "5G NB", and "cell" may be used interchangeably herein.

In some aspects, the cells may not necessarily be fixed, and the geographic area of the cells may move according to the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and/or to one or more other BSs or network nodes (not shown) in the access network 100 by various types of backhaul interfaces (e.g., direct physical connections, virtual networks, etc.) using any suitable transport network.

Wireless network 100 may also include relay stations. A relay station is an entity that can receive a data transmission from an upstream station (e.g., a BS or a UE) and send the data transmission to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that may relay transmissions for other UEs. In the example shown in fig. 1, relay station 110d may communicate with macro BS110 a and UE120 d to facilitate communication between BS110 a and UE120 d. The relay station may also be referred to as a relay BS, a relay base station, a relay, etc.

The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, the macro BS may have a high transmit power level (e.g., 5 to 40 watts), while the pico BS, femto BS, and relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

Network controller 130 may be coupled to a set of BSs and may provide coordination and control for these BSs. The network controller 130 may communicate with the BSs via a backhaul. The BSs may also communicate with each other, directly or indirectly, e.g., via a wireless or wired backhaul.

UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout wireless network 100, and each UE may be fixed or mobile. A UE may also be referred to as an access terminal, mobile station, subscriber unit, station, etc. A UE may be a cellular phone (e.g., a smartphone), a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop, a cordless phone, a Wireless Local Loop (WLL) workstation, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor/device, a wearable device (smartwatch, smartclothing, smartglasses, a smartwristband, smartjewelry (e.g., smartring, smartbracelet)), an entertainment device (e.g., a music or video device or a satellite radio), a vehicle component or sensor, a smartmeter/sensor, industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

Some UEs may be considered Machine Type Communication (MTC) or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. The wireless nodes may provide connectivity to or from a network (e.g., a wide area network such as the internet or a cellular network) via wired or wireless communication links. Some UEs may be considered internet of things (IoT) devices and/or may be implemented as NB-IoT (narrowband internet of things) devices. Some UEs may be considered Customer Premises Equipment (CPE). UE120 may be included inside a housing that houses components of UE120 (e.g., processor components, memory components, etc.).

In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a particular RAT and may operate on one or more frequencies. A RAT may also be referred to as a radio technology, air interface, etc. The frequencies may also be referred to as carriers, frequency channels, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

In some aspects, two or more UEs 120 (e.g., shown as UE120 a and UE120 e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, the UE120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-all (V2X) protocol (e.g., may include vehicle-to-vehicle (V2V) protocol, vehicle-to-infrastructure (V2I) protocol, etc.), mesh network, and/or the like. In this case, UE120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by base station 110.

As noted above, fig. 1 is provided as an example only. Other examples may be different than that described with respect to fig. 1.

Fig. 2 shows a block diagram of a design 200 of base station 110 and UE120, which may be one of the base stations and one of the UEs in fig. 1. The base station 110 may be equipped with T antennas 234a through 234T and the UE120 may be equipped with R antennas 252a through 252R, where T ≧ 1 and R ≧ 1.

At base station 110, transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more Modulation and Coding Schemes (MCSs) for each UE based at least in part on a Channel Quality Indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-Static Resource Partitioning Information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.) and provide overhead symbols and control symbols. Transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)) and synchronization signals (e.g., Primary Synchronization Signals (PSS) and Secondary Synchronization Signals (SSS)). A Transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T Modulators (MODs) 232a through 232T. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. T downlink signals from modulators 232a through 232T may be transmitted via T antennas 234a through 234T, respectively. According to various aspects described in more detail below, a synchronization signal may be generated with position coding to convey additional information.

At UE120, antennas 252a through 252r may receive downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254R, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE120 to a data pool 260, and provide decoded control information and system information to a controller/processor 280. The channel processor may determine Reference Signal Received Power (RSRP), Received Signal Strength Indicator (RSSI), Reference Signal Received Quality (RSRQ), Channel Quality Indicator (CQI), and the like. In some aspects, one or more components of UE120 may be included in a housing.

On the uplink, at UE120, a transmit processor 264 may receive and process data from a data source 262 and control information from a sum controller/processor 280 (e.g., for reporting including RSRP, RSSI, RSRQ, CQI, etc.). Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to base station 110. At base station 110, the uplink signals from UE120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 (if applicable), and further processed by a receive processor 238 to obtain the decoded data and control information sent by UE 120. Receive processor 238 may provide the decoded data to a data pool 239 and the decoded control information to a controller/processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. Network controller 130 may include a communication unit 294, a controller/processor 290, and a memory 292.

As described in more detail elsewhere herein, controller/processor 240 of base station 110, controller/processor 280 of UE120, and/or any other component(s) of fig. 2 may perform one or more techniques associated with resource rate matching for remote interference management. For example, controller/processor 240 of base station 110, controller/processor 280 of UE120, and/or any other component(s) of fig. 2 may perform or direct operations such as process 800 of fig. 8, process 900 of fig. 9, and/or other processes described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE120, respectively. A scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.

In some aspects, the first BS110 may include: means for detecting remote interference to one or more uplink communications on a Physical Uplink Shared Channel (PUSCH) associated with a first BS110, the remote interference caused by propagation of one or more Reference Signal (RS) communications transmitted by a second BS110, reflections of the one or more RS communications exiting a coverage area of the second BS110 and entering a coverage area of the first BS110 due to reflections of the one or more RS communications, wherein the coverage area of the first BS and the coverage area of the second BS110 are non-overlapping coverage areas; means for adjusting one or more radio resource allocations of a PUSCH associated with the first BS110 based at least in part on detecting the remote interference, and/or the like. In some aspects, BS110 may comprise: means for determining to transmit one or more RIM RS communications; means for determining that transmission of the one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications; means for reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein BS110 is to refrain from transmitting the one or more downlink communications using the one or more radio resources; means for transmitting one or more RIM RS communications using one or more radio resources, and the like. In some aspects, such components may include one or more components of BS110 described in conjunction with fig. 2.

As noted above, fig. 2 is provided as an example only. Other examples may be different than that described with respect to fig. 2.

Fig. 3A shows an example frame structure 300 for FDD in a telecommunication system (e.g., NR). The transmission timeline for each downlink and uplink may be divided into units of radio frames (sometimes referred to as frames). Each radio frame may have a predetermined duration (e.g., 10 milliseconds (ms)) and may be divided into a set of Z (Z ≧ 1) subframes (e.g., with an index from 0 to Z-1). Each subframe may have a predetermined duration (e.g., 1ms) and may comprise a set of slots (e.g., each subframe 2 is shown in fig. 3A^mA time slot, where m is a set of parameters for transmission, such as 0, 1, 2, 3, 4, etc.). Each slot may include a set of L symbol periods. For example, each slot may include fourteen symbol periods (e.g., as shown in fig. 3A), seven symbol periods, or another number of symbol periods. In the case where a subframe includes two slots (e.g., when m ═ 1), the subframe may include 2L symbol periods, where the 2L symbol periods in each subframe may be allocated indices of 0 to 2L-1. In some aspects, scheduling units for FDD may be frame-based, subframe-based, slot-based, symbol-based, and so on.

Although some techniques are described herein in connection with frames, subframes, slots, etc., the techniques may be equally applied to other types of wireless communication structures, 5G NR, which may be referred to using terms other than "frame," "subframe," "slot," etc. In some aspects, a wireless communication structure may refer to periodic time-bounded communication units defined by a wireless communication standard and/or protocol. Additionally or alternatively, configurations of different wireless communication structures than that shown in fig. 3A may be used.

In some telecommunications (e.g., NR), a base station may transmit a synchronization signal. For example, a base station may transmit a Primary Synchronization Signal (PSS), a Secondary Synchronization Signal (SSS), etc., on the downlink of each cell supported by the base station. The UE may use PSS and SSS for cell search and acquisition. For example, the UE may use the PSS to determine symbol timing and the UE may use the SSS to determine a physical cell identifier associated with the base station and frame timing. The base station may also transmit a Physical Broadcast Channel (PBCH). The PBCH may carry some system information, such as system information supporting initial access of the UE.

In some aspects, a base station may transmit a PSS, an SSs, and/or a PBCH according to a synchronization communication hierarchy (e.g., a Synchronization Signal (SS) hierarchy) that includes multiple synchronization communications (e.g., SS blocks), as described below in connection with fig. 3B.

Fig. 3B is a block diagram conceptually illustrating an example SS hierarchy, which is an example of a synchronous communication hierarchy. As shown in fig. 3B, the SS hierarchy may include a set of SS bursts, which may include a plurality of SS bursts (identified as SS burst 0 through SS burst B-1, where B is the maximum number of repetitions of an SS burst that may be transmitted by a base station). As further shown, each SS burst may include one or more SS blocks (identified as SS block 0 through SS block (b)_{max_SS}-1), wherein b_{max_SS}-1 is the maximum number of SS blocks that an SS burst can carry). In some aspects, different SS blocks may be beamformed differently. As shown in fig. 3B, the wireless node may transmit the set of SS bursts periodically, such as every X milliseconds. In some aspects, the set of SS bursts may have a fixed or dynamic length, shown as Y milliseconds in fig. 3B.

The set of SS bursts shown in fig. 3B is an example of a set of synchronous communications, and other sets of synchronous communications may be used in conjunction with the techniques described herein. Moreover, the SS blocks shown in fig. 3B are examples of synchronous communications, and other synchronous communications may be used in conjunction with the techniques described herein.

In some aspects, SS blocks include resources that carry PSS, SSs, PBCH, and/or other Synchronization signals (e.g., Third Synchronization Signal (TSS)) and/or Synchronization channels. In some aspects, multiple SS blocks are included in an SS burst, and the PSS, SSs, and/or PBCH may be the same on each SS block of the SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, the SS block may be at least four symbol periods in length, with each symbol carrying one or more of PSS (e.g., occupying one symbol), SSs (e.g., occupying one symbol), and/or PBCH (e.g., occupying two symbols).

In some aspects, as shown in fig. 3B, the symbols of the SS blocks are consecutive. In some aspects, the symbols of the SS blocks are non-consecutive. Similarly, in some aspects, one or more SS blocks of an SS burst may be transmitted in consecutive radio resources (e.g., consecutive symbol periods) during one or more time slots. Additionally or alternatively, one or more SS blocks of an SS burst may be transmitted in non-contiguous radio resources.

In some aspects, an SS burst may have a burst period, whereby a base station transmits SS blocks of an SS burst according to the burst period. In other words, the SS block may be repeated during each SS burst. In some aspects, the set of SS bursts may have a burst set periodicity, whereby the base station transmits SS bursts of the set of SS bursts according to a fixed burst set periodicity. In other words, the SS bursts may be repeated during each set of SS bursts.

The base station may transmit system information, such as System Information Blocks (SIBs), on a Physical Downlink Shared Channel (PDSCH) in certain time slots. The base station may send control information/data on a Physical Downlink Control Channel (PDCCH) in C symbol periods of a slot, where B may be configurable for each slot. The base station may transmit traffic data and/or other data on the PDSCH in the remaining symbol periods of each slot.

As described above, fig. 3A and 3B are provided as examples. Other examples may be different than that described with respect to fig. 3A and 3B.

Fig. 4 shows an example slot format 410 with a conventional cyclic prefix. The available time-frequency resources may be divided into resource blocks. Each resource block may cover a set of subcarriers (e.g., 12 subcarriers) in one slot and may include multiple resource elements. Each resource element may cover one subcarrier in one symbol period (e.g., in time) and may be used to transmit one modulation symbol, which may be a real or complex value.

In some telecommunication systems (e.g., NR), a staggered structure may be used for each of the downlink and uplink for FDD. For example, a Q interleave may be defined with an index from 0 to Q-1, where Q may be equal to 4, 6, 8, 10, or some other value. Each interlace may include slots separated by Q frames. Specifically, interlace Q may include slots Q, Q + Q, Q +2Q, etc., where Q ∈ {0, …, Q-1 }.

The UE may be located within the coverage of multiple BSs. One of the BSs may be selected to serve the UE. The serving BS may be selected based at least in part on various criteria such as received signal strength, received signal quality, path loss, and the like. The received signal quality may be quantified by a signal-to-interference-and-noise ratio (SNIR), a Reference Signal Received Quality (RSRQ), or some other metric. The UE may operate in a dominant interference scenario, where the UE may observe high interference from one or more interfering BSs.

Although various aspects of the examples described herein may be associated with NR or 5G technologies, various aspects of the present disclosure may be applicable to other wireless communication systems. A New Radio (NR) may refer to a radio configured to operate according to a new air interface (e.g., different from an Orthogonal Frequency Division Multiple Access (OFDMA) -based air interface) or a fixed transport layer (e.g., different from an Internet Protocol (IP)). In various aspects, NR may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) and/or SC-FDM on the uplink, CP-OFDM may be utilized on the downlink and include support for half-duplex operation using TDD. In various aspects, the NR may utilize, for example, OFDM with CP (referred to herein as CP-OFDM) and/or discrete fourier transform spread orthogonal frequency division multiplexing (DFT-s-OFDM) on the uplink, may utilize CP-OFDM on the downlink and include support for half-duplex operation using TDD. NR may include mission critical for enhanced mobile broadband (eMBB) services for broadband (e.g., 80 megahertz (MHz) and above), millimeter wave (mmW) for high carrier frequencies (e.g., 60 gigahertz (GHz)), massive MTC (MTC) for non-backward compatible MTC technologies, and/or for ultra-reliable low latency communication (URLLC) services.

In some aspects, a single component carrier bandwidth of 100MHz may be supported. The NR resource blocks may span 12 subcarriers with a subcarrier bandwidth of 60 or 120 kilohertz (kHz) for a duration of 0.1 milliseconds (ms). Each radio frame may include 40 slots and may have a length of 10 ms. Thus, each slot may have a length of 0.25 ms. Each slot may indicate a link direction (e.g., DL or UL) for data transmission, and the link direction of each slot may be dynamically switched. Each slot may include DL/UL data as well as DL/UL control data.

Beamforming may be supported and beam directions may be dynamically configured. MIMO transmission with precoding may also be supported. MIMO configuration in DL may support up to 8 transmit antennas, multi-layer DL transmission with up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE may be supported. Aggregation of multiple cells (up to 8 serving cells) may be supported. Alternatively, the NR may support a different air interface in addition to the OFDM based interface. The NR network may comprise entities such as central units or distributed units.

As described above, fig. 4 is provided as an example. Other examples may be different than that described with respect to fig. 4.

Fig. 5 illustrates an example logical architecture of a distributed RAN 500 in accordance with various aspects of the present disclosure. The 5G access node 506 may include an Access Node Controller (ANC) 502. ANC may be a Central Unit (CU) of the distributed RAN 500. The backhaul interface to the next generation core network (NG-CN)504 may terminate at the ANC. The backhaul interface to the neighboring next generation access node (NG-AN) may terminate at the ANC. An ANC may include one or more TRPs 508 (which may also be referred to as a BS, NR BS, nodeb, 5G NB, AP, gNB, or some other terminology). As described above, "TRP" may be used interchangeably with "cell".

The TRP 508 may be a Distributed Unit (DU). The TRP may be connected to one ANC (ANC 502) or multiple ANCs (not shown). For example, for RAN sharing, radio as a service (RaaS), AND service specific AND deployments, a TRP may be connected to multiple ANCs. The TRP may include one or more antenna ports. The TRP may be configured to serve traffic to the UE individually (e.g., dynamic selection) or jointly (e.g., joint transmission).

The local architecture of the RAN 500 may be used to illustrate a fronthaul (frontaul) definition. An architecture may be defined that supports outbound solutions across different deployment types. For example, the architecture may be based at least in part on transport network capabilities (e.g., bandwidth, latency, and/or jitter).

The architecture may share features and/or components with LTE. According to various aspects, the next generation AN (NG-AN)510 may support dual connectivity with NRs. The NG-ANs may share a common fronthaul for LTE and NR.

The architecture may enable cooperation between TRPs 508. For example, cooperation may be preset within and/or between the TRPs via ANC 502. According to various aspects, the inter-TRP interface may not be required/present.

According to various aspects, there may be dynamic configuration of separate logical functions within the architecture of RAN 500. Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), Medium Access Control (MAC) protocols may be placed at ANC or TRP as appropriate.

According to various aspects, a BS may include a Central Unit (CU) (e.g., ANC 502) and/or one or more distributed units (e.g., one or more TRPs 508).

As noted above, fig. 5 is provided as an example only. Other examples may be different than that described with respect to fig. 5.

Fig. 6 illustrates an example physical architecture of a distributed RAN 600 in accordance with various aspects of the present disclosure. The centralized core network unit (C-CU)602 may carry (host) core network functions. The C-CU can be deployed centrally. To handle peak capacity, C-CU functionality may be offloaded (e.g., to Advanced Wireless Services (AWS)).

A centralized RAN unit (C-RU)604 may carry one or more ANC functions. Alternatively, the C-RU may carry the core network functions locally. The C-RU may have a distributed deployment. The C-RU may be closer to the network edge.

Distributed Unit (DU)606 may carry one or more TRPs. The DUs may be located at the edge of a Radio Frequency (RF) enabled network.

As noted above, fig. 6 is provided as an example only. Other examples may be different than that described with respect to fig. 6.

In a communication system, a base station may transmit a downlink signal that may be received by one or more UEs within and/or around the edge of the coverage area of the base station. In some cases, due to signal reflections caused by various environmental factors, the transmission of the downstream signal may reach another base station, such as a reflection from a mountain, a reflection from the surface of a body of water (e.g., a lake, the ocean, etc.), a reflection from an atmospheric wave guide, and so forth.

In some cases, the downlink signal may cause interference in the coverage area of another base station and/or the coverage area of a base station. For example, during scheduled uplink transmissions in a coverage area, propagation delays due to large distances (e.g., on the order of tens or hundreds of kilometers) between a base station and another base station may cause downlink signals to enter the coverage area of another base station and may interfere with and/or completely block uplink transmissions. As another example, the downlink signal may cause interference to other downlink signals transmitted in the coverage area of the base station.

Some aspects described herein provide techniques and apparatus for resource rate matching for remote interference management. In some aspects, a receiver (e.g., BS110, UE120, etc.) may detect interference to one or more uplink communications on a PUSCH associated with the receiver. In some aspects, interference may be caused by one or more Reference Signal (RS) communications transmitted by a transmitter (e.g., BS110, UE120, etc.). In some aspects, a receiver may adjust one or more radio resource allocations of a PUSCH associated with the receiver based at least in part on detecting interference. In this way, the radio resources of the PUSCH associated with the receiver do not overlap with the radio resources used by the one or more RS communications transmitted by the transmitter. This minimizes interference between the radio resources of the PUSCH and one or more RS communications, which increases the reliability of the receiver and/or transmitter by reducing the number of lost communications caused by interference, reduces the use of processing, memory and radio resources of the receiver and/or transmitter by reducing the number of communications retransmissions due to interference or the like.

In some aspects, a transmitter (e.g., BS110, UE120, etc.) may determine to transmit one or more RS communications, and may reserve one or more radio resources for transmitting the one or more RS communications based at least in part on determining to transmit the one or more RS communications. In this way, the transmitter may refrain from transmitting one or more downlink communications using the one or more radio resources, and may transmit the one or more RS communications using the one or more radio resources. This minimizes and/or eliminates interference between one or more RS communications and one or more downlink communications, which in turn reduces the number of lost communications caused by the interference and reduces the use of processing, memory and radio resources of the transmitter by reducing the number of retransmissions of downlink communications and/or RS communications due to interference and the like.

Fig. 7A-7C are diagrams illustrating an example 700 of resource rate matching for remote interference management, in accordance with various aspects of the present disclosure. As shown in fig. 7A-7C, example 700 includes a plurality of BSs 110 (e.g., BS110 a, BS110b, etc.) and a plurality of UEs 120 (e.g., UE120 a, UE120b, UE 120C, UE120 d, UE120 f, etc.). In some aspects, BS110 and/or UE120 may be included in the same communication system, may be included in multiple different communication systems, and so on.

In some aspects, BS110 a and BS110b may each be associated with a respective coverage area. For example, BS110 a may generate and provide a first coverage area in which a plurality of UEs 120 (e.g., UE120 a, UE120b, UE120 c, etc.) may be located; BS110b may generate and provide a second coverage area in which a plurality of UEs 120 (e.g., UE120 d, UE120 e, UE120 f, etc.) may be located; and so on. The BS110 a and the UE120 in the first coverage area may communicate using various types of communication, such as uplink communication, downlink communication, and the like. Similarly, BS110b and UE120 in the second coverage area may communicate using various types of communications, such as uplink communications, downlink communications, and so on. In some aspects, the first coverage area and the second coverage area may not overlap, and/or may be geographically separated by a large distance (e.g., on the order of tens of kilometers, hundreds of kilometers, etc.).

As shown in fig. 7A, BS110 a may transmit downlink communications in a first coverage area. For example, BS110 a may transmit downlink communications to UE120 in a first coverage area. As indicated by reference numeral 710, in some aspects, the BS110 a may transmit one or more Reference Signal (RS) communications (and thus may be referred to as a transmitter), which may be one of downlink communications. For example, BS110 a may periodically transmit one or more RS communications at certain time intervals, may semi-periodically transmit one or more RS communications, may randomly transmit one or more RS communications, and so on. In some aspects, the reference signals may include demodulation reference signals (DMRS), channel state information reference signals (CSI-RS), Phase Tracking Reference Signals (PTRS), Sounding Reference Signals (SRS), cell-specific reference signals (CRS), Primary Synchronization Signals (PSS), Secondary Synchronization Signals (SSS), one or more signals of a Synchronization Signal Block (SSB), remote interference management reference signals (RIM RS), and/or the like.

In some aspects, one or more RS communications may cause interference in the communication system. For example, as shown in fig. 7A, one or more RS communications may leave a first coverage area and enter a second coverage area associated with BS110b, and may cause interference in the second coverage area. BS110b (which may be referred to as a receiver due to receiving one or more RS communications) may detect interference caused by the one or more RS communications and may send a notification to BS110 a that the one or more RS communications are causing interference in the second coverage area. BS110 a may receive the notification and may adjust one or more downlink transmission parameters associated with BS110 a based on the received notification.

In some aspects, the interference in the second coverage area caused by the one or more RS communications may include interference to one or more uplink communications on a PUSCH associated with BS110 b. For example, as shown in fig. 7A, propagation delays due to the distance between BS110 a and BS110b may cause one or more RS communications to at least partially overlap with one or more uplink communications between BS110b and UE120 in the second coverage area. As an example, a first RS communication (e.g., RS1) may at least partially overlap an uplink communication transmitted by UE120 d and an uplink communication transmitted by UE120 e, a second RS communication (e.g., RS2) may at least partially overlap an uplink communication transmitted by UE120 e, a third RS communication (e.g., RS3) may at least partially overlap an uplink communication transmitted by UE120 f, and so on.

In some aspects, transmission of one or more RS communications may cause interference in the first coverage area. For example, as shown in fig. 7A, transmission of one or more RS communications may cause interference to one or more downlink communications transmitted by BS110 a to UEs 120 in the first coverage area. As an example, a first RS communication (e.g., RS1) may at least partially overlap a downlink communication sent by BS110 a to UE120 a and a downlink communication sent by BS110 a to UE120b, a second RS communication (e.g., RS2)) may at least partially overlap a downlink communication sent by BS110 a to UE120b, a third RS communication (e.g., RS3) may at least partially overlap a downlink communication sent by BS110 a to UE120 c, and so on. Since one or more RS communications may be RIM RS communications, the RS communications may be transmitted at a relatively large transmit power such that the RS communications travel long distances to reach the coverage area of a remote BS (e.g., BS110 b). As a result, the relatively large transmit power of the RS communication may cause interference to downlink communications that at least partially overlap with the RS communication.

As shown in fig. 7B, BS110B may mitigate and/or eliminate interference caused by transmission of one or more RS communications to one or more uplink communications on a PUSCH associated with BS 110B. As shown at reference numeral 720, BS110b may detect interference caused by transmission of one or more RS communications to one or more uplink communications on a PUSCH associated with BS110b, and may adjust one or more radio resource allocations of the PUSCH based at least in part on the detected interference. In some aspects, BS110b may detect interference based on receiving RS communications included in the one or more RS communications, based on receiving a sequence of RS communications included in the one or more RS communications, and/or the like.

In some aspects, BS110b may adjust one or more radio resource allocations of one or more resource blocks associated with the PUSCH, one or more resource elements associated with the PUSCH, and/or any other resource elements included in a frame structure of a physical layer of BS110 b.

In some aspects, BS110b may adjust one or more radio resource allocations at the resource block level. For example, if BS110b is not aware of a transmission schedule associated with transmission of one or more RS communications, BS110b may adjust one or more radio resource allocations at the resource block level. As another example, BS110b may determine a number of resource block symbols associated with one or more uplink communications that one or more RS communications are interfering, may determine whether the number of resource block symbols satisfies a threshold number of resource block symbols (e.g., 2 symbols, 10 symbols, etc.), and may adjust one or more radio resource allocations at the resource block level based at least in part on determining that the number of resource block symbols does not satisfy the threshold number of resource block symbols. As another example, BS110b may determine a signal strength of one or more RS communications, may determine whether the signal strength satisfies a threshold signal strength (e.g., a Received Signal Strength Indication (RSSI) threshold, a Reference Signal Received Power (RSRP) threshold, etc.), and may adjust one or more radio resource allocations on a resource block level based at least in part on determining that the signal strength does not satisfy the threshold signal strength.

In some aspects, to adjust the one or more resource allocations on a resource block level, BS110b may determine one or more radio resources (e.g., resource blocks) associated with BS110b that one or more RS communications are interfering and may refrain from using the one or more resource blocks. As a result, BS110B may avoid using the radio resources (e.g., resource elements) used by BS110 a to transmit one or more RS communications, as well as any other potential radio resources (e.g., resource elements) included in the one or more resource blocks that BS110 a may potentially use to transmit one or more RS communications, as shown in fig. 7B. For example, as shown in fig. 7B, BS110B may refrain from using one or more resource blocks for uplink communication on the PUSCH.

BS110b may refrain from using one or more resource blocks by sending an instruction to UE120 in the second coverage area instructing UE120 to refrain from using the one or more resource blocks to send uplink communications. The instructions may include rate matching bitmap-1 instructions (e.g., instructions specifying one or more frequencies that UE120 will not use to transmit uplink communications), rate matching bitmap-2 instructions (e.g., instructions specifying one or more time slots associated with one or more resource blocks that UE120 will not use to transmit uplink communications), rate matching bitmap-3 instructions (e.g., instructions specifying an effective period for a frequency and time configuration of the bitmap 1 and bitmap 2 instructions), and so on. In some aspects, the validity period of the frequency and time configuration may be one time unit, five time units, ten time units, or the like. If BS110b does not send the rate matching bitmap-3 instructions, or the rate matching bitmap-3 instructions are zero values, then the rate matching bitmap-1 instructions and the rate matching bitmap-2 instructions may be dynamic rather than static, in which case BS110b may configure the rate matching bitmap-1 instructions and the rate matching bitmap-2 instructions per time unit. In this manner, BS110b may use a smaller granularity in adjusting one or more resource allocations when BS110b does not know or cannot determine with a high probability the specific resource elements that BS110 a uses to transmit one or more RS communications.

In some aspects, BS110b may adjust one or more radio resource allocations at the resource element level. For example, BS110b may receive scheduling information associated with transmission of one or more RS communications (e.g., from BS110 a, from another device included in the communication system, etc.). Accordingly, BS110b may adjust one or more radio resource allocations at the resource element level based on the received scheduling information. As another example, BS110b may determine a number of resource block symbols associated with one or more uplink communications that one or more RS communications are interfering, may determine whether the number of resource block symbols satisfies a threshold number of resource block symbols, and may adjust one or more radio resource allocations at a resource element level based at least in part on determining that the number of resource block symbols satisfies the threshold number of resource block symbols. As another example, BS110b may determine a signal strength of one or more RS communications, may determine whether the signal strength satisfies a threshold signal strength, and may adjust one or more radio resource allocations at a resource element level based at least in part on determining that the signal strength satisfies the threshold signal strength.

In some aspects, to adjust the one or more resource allocations on a resource element level, BS110b may determine one or more radio resources (e.g., one or more resource elements) associated with BS110b that one or more RS communications are interfering (e.g., based on scheduling information, based on a number of resource block symbols, based on a signal strength of the one or more RS communications, etc.) and may refrain from using the one or more radio resources for uplink communications on the PUSCH. For example, as shown in fig. 7C, BS110b may refrain from using one or more resource elements associated with one or more RS communications while allowing uplink communications on the PUSCH using other resource elements included in the same resource block as the one or more resource elements.

BS110b may refrain from using one or more resource elements by transmitting configuration information to UEs 120 in the second coverage area, refrain from using one or more resource elements to transmit uplink communications, use one or more other resource elements to transmit uplink communications, and/or the like. The configuration information may include instructions for UE120 in the second coverage area to transmit one or more zero-power channel state information reference signals (CSI-RS) during reception of one or more resource elements of the RS communication at BS110 b. In this manner, when BS110b knows or can determine with a high probability that BS110 a is using specific resource elements for transmitting one or more RS communications, BS110b can use a larger granularity in adjusting one or more resource allocations, which improves the efficiency of utilization of radio resources in the second coverage area.

Returning to fig. 7B, BS110 a may mitigate and/or eliminate interference caused by the transmission of one or more RS communications to one or more downlink communications transmitted by BS110 a in the first coverage area. As indicated by reference numeral 730, BS110 a can determine to transmit one or more Reference Signal (RS) communications, and can reserve one or more radio resources in a first coverage area for transmitting the one or more RS communications based at least in part on determining to transmit the one or more RS communications. BS110 a may refrain from transmitting one or more downlink communications to UE120 in the first coverage area using the one or more radio resources. BS110 a may transmit one or more RS communications using one or more radio resources.

In some aspects, BS110 a may receive one or more radio resources at a resource block level, at a resource element level, and/or the like. For example, as shown in fig. 7B, BS110 a may reserve one or more resource blocks associated with BS110 a for transmitting one or more RS communications. BS110 a may reserve one or more radio resources at the resource block level based at least in part on, for example, being configured to transmit one or more RS communications semi-periodically. In this manner, any potential radio resources that may be used by BS110 to transmit one or more RS communications are reserved, which reduces the likelihood of interference to one or more downlink communications.

As another example, as shown in fig. 7C, BS110 a may reserve one or more resource elements associated with BS110 a for transmitting one or more RS communications. BS110 a may reserve one or more radio resources at the resource block level based at least in part on, for example, instructions configured to periodically transmit one or more RS communications (e.g., based on receiving scheduling information and/or periodically transmitting one or more RS communications). In this way, since BS110 a is aware of the transmission schedule for one or more RS communications, BS110 a may reserve one or more radio resources with greater granularity, which improves the efficiency of utilization of the radio resources in the first coverage area.

As described above, fig. 7A to 7C are provided as examples. Other examples may be different than that described with respect to fig. 7A-7C.

Fig. 8 is a diagram illustrating an example process 800, e.g., performed by a receiver, in accordance with various aspects of the present disclosure. Example process 800 is an example of a first BS (e.g., BS 110) performing resource rate matching for remote interference management.

As shown in fig. 8, in some aspects, process 800 may include detecting remote interference to one or more uplink communications on a PUSCH associated with a first BS, the remote interference caused by propagation of one or more RS communications transmitted by a second BS, the one or more RS communications exiting a coverage area of the second BS and entering a coverage area of the first BS due to reflection of the one or more RS communications, wherein the coverage areas of the first BS and the second BS are non-overlapping coverage areas (block 810). For example, as described above, the first BS (e.g., using antennas 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, memory 242, etc.) may detect remote interference to one or more uplink communications on a PUSCH associated with the first BS, the remote interference being caused by propagation of one or more RS communications transmitted by the second BS, the one or more RSs exiting the coverage area of the second BS and entering the coverage area of the first BS due to reflections of the communications by the one or more RSs. In some embodiments, the coverage area of the first BS and the coverage area of the second BS are non-overlapping coverage areas.

As further shown in fig. 8, in some aspects, process 800 may include adjusting one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting the remote interference (block 820). For example, the first BS (e.g., using controller/processor 240, memory 242, etc.) may adjust one or more radio resource allocations of a PUSCH associated with the first BS based at least in part on detecting remote interference, as described above.

Process 800 may include additional aspects such as any single aspect or any combination of aspects described below and/or in conjunction with one or more other processes described elsewhere herein.

In a first aspect, adjusting one or more radio resource allocations comprises: determining one or more radio resources associated with a first BS to which one or more RS communications are remotely interfering; and refrain from using the one or more radio resources for uplink communication on the PUSCH. In a second aspect, alone or in combination with the first aspect, the one or more radio resources comprise one or more resource blocks associated with the receiver.

In a third aspect, alone or in combination with one or more of the first or second aspects, avoiding using one or more radio resources for uplink communication on PUSCH comprises: sending rate matching bitmap-1 instructions to one or more UEs in a coverage area of a first BS that avoid using one or more radio resources for uplink communication on a PUSCH; rate matching bitmap-2 instructions that avoid using one or more radio resources for uplink communication on PUSCH; avoiding use of one or more radio resources for at least one of the rate matching bits of the uplink communication on the PUSCH-3 instructions.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, the process 800 further comprises: receiving scheduling information associated with transmission of one or more RS communications; and adjusting one or more radio resource allocations comprises: based at least in part on the scheduling information, refraining from using one or more radio resources associated with the first BS for uplink communication on the PUSCH, the one or more radio resources overlapping with transmission of the one or more RS communications.

In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, adjusting the one or more radio resource allocations comprises: transmitting, to one or more UEs in a coverage area of the first BS, configuration information associated with the one or more radio resource allocations, the configuration information for configuring the one or more UEs to transmit one or more zero-power CSI-RSs. In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, transmitting configuration information associated with the one or more radio resource allocations comprises at least one of periodically transmitting the configuration information or semi-periodically transmitting the configuration.

In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, detecting remote interference to one or more uplink communications comprises: an RS communication sequence transmitted by the second BS is received, and remote interference is detected based at least in part on the received RS communication sequence. In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, adjusting the one or more radio resource allocations comprises: determining a number of resource block symbols associated with one or more uplink communications; determining whether the number of resource block symbols meets a threshold number of resource block symbols; and refrain from using one or more resource elements associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols satisfies the threshold number of resource block symbols.

In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, adjusting the one or more radio resource allocations comprises: determining a number of resource block symbols associated with one or more uplink communications; determining whether the number of resource block symbols meets a threshold number of resource block symbols; and refrain from using one or more resource blocks associated with the resource block symbol for uplink communication on the PUSCH based at least in part on determining that the number of resource block symbols does not satisfy the threshold number of resource block symbols.

In a tenth aspect, alone or in combination with one or more of the first to ninth aspects, adjusting the one or more radio resource allocations comprises: determining a signal strength of one or more RS communications; determining whether the signal strength satisfies a threshold signal strength; and refrain from using the one or more resource elements for uplink communication on the PUSCH based at least in part on determining that the signal strength satisfies the threshold signal strength. In an eleventh aspect, alone or in combination with one or more of the first to tenth aspects, adjusting the one or more radio resource allocations comprises determining a signal strength of the one or more RS communications; determining whether the signal strength satisfies a threshold signal strength; refraining from using one or more resource blocks for uplink communication on the PUSCH based at least in part on determining that the signal strength does not satisfy the threshold signal strength.

Although fig. 8 shows example blocks of the process 800, in some aspects the process 8 may include more blocks, fewer blocks, different blocks, or a different arrangement of blocks than shown in fig. 8. Additionally or alternatively, two or more blocks of the process 800 may be performed in parallel.

Fig. 9 is a diagram illustrating an example process 900 performed, for example, by a receiver, in accordance with various aspects of the present disclosure. Example process 900 is an example of a BS (e.g., BS 110) performing resource rate matching for remote interference management.

As shown in fig. 9, in some aspects, process 900 may include determining to transmit one or more RIM RS communications (block 910). For example, as described above, the BS (e.g., using controller/processor 240, memory 242, etc.) may determine to transmit one or more RIM RS communications.

As further illustrated in fig. 9, in some aspects, process 900 may include determining that transmissions of one or more RIM RS communications will cause interference to transmissions of one or more downlink communications that at least partially overlap with transmissions of the one or more RIM RS communications (block 920). For example, as described above, the BS (e.g., using controller/processor 240, memory 242, etc.) may determine that transmission of one or more RIM RS communications will cause interference to transmission of one or more downlink communications that at least partially overlap with transmission of the one or more RIM RS communications.

As further shown in fig. 9, in some aspects, process 900 may include reserving one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications, wherein the BS will refrain from transmitting the one or more downlink communications using the one or more radio resources (block 930). For example, as described above, the BS (e.g., using controller/processor 240, memory 242, etc.) may reserve one or more radio resources for transmitting one or more RIM RS communications based at least in part on determining that transmission of the one or more RIM RS communications will interfere with transmission of the one or more downlink communications. In some embodiments, the BS will refrain from transmitting one or more downlink communications using one or more radio resources.

As further shown in fig. 9, in some aspects, process 900 may include transmitting one or more RIM RS communications using one or more radio resources (block 940). For example, as described above, the BS (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antennas 234, etc.) may transmit one or more RIM RS communications using one or more radio resources.

Process 900 may include additional aspects such as any single aspect or any combination of aspects described below and/or in conjunction with one or more other processes described elsewhere herein.

In the first aspect, the one or more radio resources comprise at least one of one or more resource blocks associated with the BS or one or more resource elements associated with the BS. In a second aspect, alone or in combination with the first aspect, the process 900 further comprises: receiving scheduling information associated with transmitting one or more RS communications; reserving one or more radio resources includes: one or more resource elements associated with the BS are reserved based on receiving the scheduling information.

Although fig. 9 shows example blocks of the process 900, in some aspects, the process 8 may include more blocks, fewer blocks, different blocks, or a different arrangement of blocks than shown in fig. 9. Additionally or alternatively, two or more blocks of process 900 may be performed in parallel.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the various aspects to the precise form disclosed. Modifications and variations are possible in light of the above disclosure or may be acquired from practice of various aspects.

As used herein, the term "component" is intended to be broadly interpreted as hardware, firmware, or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, or a combination of hardware and software.

Some aspects are described herein in connection with a threshold. As used herein, meeting a threshold may refer to a value that is greater than the threshold, greater than or equal to the threshold, less than or equal to the threshold, not equal to the threshold, and the like.

It is apparent that the systems and/or methods described herein may be implemented in various forms of hardware, firmware, or a combination of hardware and software. The actual specialized control hardware or software code used to implement the systems and/or methods is not limiting of these aspects. Thus, the operation and behavior of the systems and/or methods were described herein without reference to the specific software code-it being understood that software and hardware may be designed to implement the systems and/or methods based, at least in part, on the description herein.

Even though specific combinations of features are recited in the claims and/or disclosed in the specification, these combinations are not intended to limit the disclosure of the various aspects. In fact, many of these features may be combined in ways not specifically recited in the claims and/or disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of the various aspects includes each dependent claim in combination with every other claim in the set of claims. A phrase referring to "at least one of" a list of items refers to any combination of those items, including a single member. For example, "at least one of a, b, or c" is intended to encompass a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination of multiple identical elements (e.g., a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b-b, b-b-c, c-c, and c-c-c, or any other order of a, b, and c).

No element, act, or instruction used herein should be construed as critical or essential unless explicitly described as such. In addition, as used herein, the articles "a" and "an" are intended to include one or more items, and may be used interchangeably with "one or more". Further, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, unrelated items, combinations of related and unrelated items, etc.) and may be used interchangeably with "one or more". Where only one item is intended, the term "only one item" or similar language is used. Also, as used herein, the terms "has," "have," "having," and the like are intended to be open-ended terms. Further, the phrase "based on" is intended to mean "based, at least in part, on" unless explicitly stated otherwise.