阅读说明：本技术 具有分组延迟预算约束的资源分配 (Resource allocation with packet delay budget constraints ) 是由 A·巴拉德瓦杰 T·V·阮 K·古拉蒂 S·K·巴盖尔 S·帕蒂尔 于 2020-04-16 设计创作，主要内容包括：概括而言,本公开内容的各个方面涉及无线通信。在一些方面中,用户设备(UE)可以在分组到达之后选择选择窗口。该选择窗口可以是至少部分地基于与分组相关联的延迟预算来选择的。UE可以至少部分地基于选择窗口来确定控制排除区域值。UE可以至少部分地基于控制排除区域值来执行与确定用于发送与分组相关联的传输集合的可用资源相关联的资源选择。提供了大量其它方面。(In general, various aspects of the disclosure relate to wireless communications. In some aspects, a User Equipment (UE) may select a selection window after a packet arrives. The selection window may be selected based at least in part on a delay budget associated with the packet. The UE may determine a control exclusion area value based at least in part on the selection window. The UE may perform resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value. Numerous other aspects are provided.)

1. A method of wireless communication performed by a User Equipment (UE), comprising:

the selection window is selected after the arrival of a packet,

wherein the selection window is selected based at least in part on a delay budget associated with the packet;

determining a control exclusion area value based at least in part on the selection window; and

performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

2. The method of claim 1, wherein the delay budget is a packet delay budget.

3. The method of claim 1, wherein performing the resource selection comprises:

determining a first set of available resources for a first transmission of the set of transmissions, an

A second set of available resources for a second transmission of the set of transmissions is determined.

4. The method of claim 3, wherein the first set of available resources and the second set of available resources are included in the selection window.

5. The method of claim 3, wherein the first transmission is sent in the first set of available resources,

wherein the second set of available resources is reserved based at least in part on control information included in the first transmission.

6. The method of claim 3, wherein the second transmission is sent in the second set of available resources,

wherein a third set of available resources is reserved based at least in part on control information included in the second transmission.

7. The method of claim 6, wherein another resource selection is performed at a time of the second transmission to determine the third set of available resources,

wherein the other resource selection performed at the time of the second transmission is only used to determine the third set of available resources.

8. The method of claim 3, further comprising:

determining that a particular set of available resources is not available after performing the resource selection,

wherein the particular set of available resources comprises the first set of available resources or the second set of available resources; and

performing a resource re-evaluation based at least in part on determining that the particular set of available resources is unavailable.

9. The method of claim 8, further comprising:

scaling the control exclusion area value based at least in part on determining that the particular set of available resources is not available in one or more selection windows,

wherein performing the resource re-evaluation comprises:

performing the resource re-evaluation based at least in part on the scaled control exclusion area value.

10. A User Equipment (UE) 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:

the selection window is selected after the arrival of a packet,

wherein the selection window is selected based at least in part on a delay budget associated with the packet;

determining a control exclusion area value based at least in part on the selection window; and

performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

11. The UE of claim 10, wherein the delay budget is a packet delay budget.

12. The UE of claim 10, wherein the one or more processors are to, when performing the resource selection:

determining a first set of available resources for a first transmission of the set of transmissions, an

A second set of available resources for a second transmission of the set of transmissions is determined.

13. The UE of claim 12, wherein the first set of available resources and the second set of available resources are included in the selection window.

14. The UE of claim 12, wherein the first transmission is transmitted in the first set of available resources,

wherein the second set of available resources is reserved based at least in part on control information included in the first transmission.

15. The UE of claim 12, wherein the second transmission is transmitted in the second set of available resources,

wherein a third set of available resources is reserved based at least in part on control information included in the second transmission.

16. The UE of claim 15, wherein another resource selection is performed at a time of the second transmission to determine the third set of available resources,

wherein the other resource selection performed at the time of the second transmission is only used to determine the third set of available resources.

17. The UE of claim 12, wherein the one or more processors are further to:

determining that a particular set of available resources is not available after performing the resource selection,

wherein the particular set of available resources comprises the first set of available resources or the second set of available resources; and

performing a resource re-evaluation based at least in part on determining that the particular set of available resources is unavailable.

18. The UE of claim 17, wherein the one or more processors are further to:

scaling the control exclusion area value based at least in part on determining that the particular set of available resources is not available in one or more selection windows,

wherein the one or more processors are to, when performing the resource re-evaluation:

performing the resource re-evaluation based at least in part on the scaled control exclusion area value.

19. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising:

one or more instructions that, when executed by one or more processors of a User Equipment (UE), cause the one or more processors to:

the selection window is selected after the arrival of a packet,

wherein the selection window is selected based at least in part on a delay budget associated with the packet;

determining a control exclusion area value based at least in part on the selection window; and

performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

20. The non-transitory computer-readable medium of claim 19, wherein the delay budget is a packet delay budget.

21. The non-transitory computer-readable medium of claim 19, wherein the one or more instructions, when causing the one or more processors to perform the resource selection, cause the one or more processors to:

determining a first set of available resources for a first transmission of the set of transmissions, an

A second set of available resources for a second transmission of the set of transmissions is determined.

22. The non-transitory computer-readable medium of claim 21, wherein the first set of available resources and the second set of available resources are included in the selection window.

23. The non-transitory computer-readable medium of claim 21, wherein the first transmission is sent in the first set of available resources,

wherein the second set of available resources is reserved based at least in part on control information included in the first transmission.

24. The non-transitory computer-readable medium of claim 21, wherein the second transmission is sent in the second set of available resources,

wherein a third set of available resources is reserved based at least in part on control information included in the second transmission.

25. The non-transitory computer-readable medium of claim 24, wherein another resource selection is performed at a time of the second transmission to determine the third set of available resources,

wherein the other resource selection performed at the time of the second transmission is only used to determine the third set of available resources.

26. The non-transitory computer-readable medium of claim 21, wherein the one or more processors, when executed by the one or more processors, further cause the one or more processors to:

determining that a particular set of available resources is not available after performing the resource selection,

wherein the particular set of available resources comprises the first set of available resources or the second set of available resources; and

performing a resource re-evaluation based at least in part on determining that the particular set of available resources is unavailable.

27. The non-transitory computer-readable medium of claim 26, wherein the one or more processors, when executed by the one or more processors, further cause the one or more processors to:

scaling the control exclusion area value based at least in part on determining that the particular set of available resources is not available in one or more selection windows,

wherein, in causing the one or more processors to perform the resource re-evaluation, the one or more instructions cause the one or more processors to:

performing the resource re-evaluation based at least in part on the scaled control exclusion area value.

28. An apparatus for wireless communication, comprising:

means for selecting a selection window after a packet arrives,

wherein the selection window is selected based at least in part on a delay budget associated with the packet;

means for determining a control exclusion area value based at least in part on the selection window; and

means for performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

29. The apparatus of claim 28, wherein the delay budget is a packet delay budget.

30. The apparatus of claim 28, wherein the means for performing the resource selection comprises:

means for determining a first set of available resources for a first transmission of the set of transmissions, an

Means for determining a second set of available resources for a second transmission of the set of transmissions.

Technical Field

Aspects of the present disclosure generally relate to wireless communications, and to techniques and apparatus for resource allocation with Packet Delay Budget (PDB) constraints.

Background

Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems 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 an enhanced set of Universal Mobile Telecommunications System (UMTS) mobile standards promulgated by the third generation partnership project (3 GPP).

A wireless communication network may include a plurality of Base Stations (BSs) capable of supporting communication for a plurality of 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, the 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 employed in various telecommunications standards to provide a common protocol that enables different user equipment to communicate on a city, country, region, or even global level. New Radios (NR), which may also be referred to as 5G, are an enhanced set of LTE mobile standards promulgated by the third generation partnership project (3 GPP). NR is designed to better integrate with other open standards by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the Downlink (DL), CP-OFDM and/or SC-FDM (e.g., also known as discrete fourier transform spread OFDM (DFT-s-OFDM)) on the Uplink (UL), as well as supporting beamforming, Multiple Input Multiple Output (MIMO) antenna techniques, and carrier aggregation, thereby better supporting mobile broadband internet access. However, as the demand for mobile broadband access continues to grow, 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 User Equipment (UE) may comprise: selecting a selection window after arrival of a packet, wherein the selection window is selected based at least in part on a delay budget associated with the packet; determining a control exclusion area value based at least in part on the selection window; and performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

In some aspects, a UE 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: selecting a selection window after arrival of a packet, wherein the selection window is selected based at least in part on a delay budget associated with the packet; determining a control exclusion area value based at least in part on the selection window; and performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

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 one or more processors of the UE, may cause the one or more processors to: selecting a selection window after arrival of a packet, wherein the selection window is selected based at least in part on a delay budget associated with the packet; determining a control exclusion area value based at least in part on the selection window; and performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

In some aspects, an apparatus for wireless communication may comprise: means for selecting a selection window after arrival of a packet, wherein the selection window is selected based at least in part on a delay budget associated with the packet; means for determining a control exclusion area value based at least in part on the selection window; and means for performing resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the control exclusion area value.

Aspects include, in general, methods, apparatuses, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and processing systems substantially as 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 nature of the concepts disclosed herein (both their organization and method of operation), together with the advantages associated therewith, will be better understood from the following description when considered in connection with the accompanying figures. Each of the figures is provided for the purposes 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, 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 in a wireless communication network communicating with a UE in accordance with various aspects of the present disclosure.

Fig. 3A-3D are diagrams illustrating examples associated with resource allocation with Packet Delay Budget (PDB) constraints in accordance with various aspects of the disclosure.

Fig. 4 is a schematic diagram illustrating an example process performed, for example, by a user device, in accordance with various aspects of the present disclosure.

Detailed Description

Various aspects of the disclosure are described more fully below 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 in combination 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. Moreover, the scope of the present disclosure is intended to cover such an apparatus or method implemented with 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 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 aspects may be described herein using terms commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure may be applied in other generation-based communication systems, such as 5G and beyond (including NR technologies).

Fig. 1 is a schematic diagram illustrating a wireless network 100 in which aspects of the present disclosure may be implemented. The wireless 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 BS 110a, BS 110b, BS 110c, and BS 110d) 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 a coverage area of a BS and/or a BS subsystem serving that coverage area, depending on the context in which the term is used.

The 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 unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs having an association 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 for the femto cell may be referred to as a femto BS or a home BS. In the example shown in fig. 1, BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c 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 cell may not necessarily be stationary, and the geographic area of the cell 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 wireless network 100 by various types of backhaul interfaces, such as a direct physical connection, a virtual network, and/or the like 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 is capable of relaying transmissions for other UEs. In the example shown in fig. 1, relay station 110d may communicate with macro BS 110a and UE120 d to facilitate communication between BS 110a 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. BSs may also communicate with one another, 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 stationary or mobile. A UE may also be called 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) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or apparatus, a biometric sensor/device, a wearable device (smartwatch, smartclothing, smartglasses, a smartwristband, smartjewelry (e.g., a smartring, smartbracelet, etc.)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter/sensor, an industrial manufacturing device, 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, a robot, a drone, a remote device, a sensor, a meter, a monitor, a location tag, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. The wireless node may provide a connection to or to a network (e.g., a wide area network such as the internet or a cellular network), for example, via a wired or wireless communication link. 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, such as a processor component, a memory component, and the like.

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. Frequencies may also be referred to as carriers, channels, etc. Each frequency may support a single RAT in a given geographic area in order 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 UE120e) may communicate directly using one or more sidelink (sidelink) channels (e.g., without using base station 110 as an intermediary to communicate with each other). For example, the UE120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-anything (V2X) protocol (e.g., which 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.

In some aspects, resource selection for sidelink communications between UEs 120 may be performed in order to meet one or more delay budgets associated with a given packet, as described elsewhere herein. For example, as described below, the UE120 may select a selection window upon arrival of a packet, determine a CE area value based at least in part on the selection window, and perform resource selection in connection with determining available resources for transmitting a transmission set associated with the packet based at least in part on the CE area value.

As noted above, fig. 1 is provided as an example. Other examples may differ from the example 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 in general.

At base station 110, transmit processor 220 may receive data for one or more UEs from a data source 212, 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.), as well as 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 (e.g., precoding) 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 greater 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 sink 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 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 decoded data to a data sink 239 and decoded control information to 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.

Controller/processor 240 of base station 110, controller/processor 280 of UE120, and/or any other component in fig. 2 may perform one or more techniques associated with resource allocation with Packet Delay Budget (PDB) constraints, as described in more detail elsewhere herein. For example, controller/processor 240 of base station 110, controller/processor 280 of UE120, and/or any other component in fig. 2 may perform or direct operations such as process 400 of fig. 4 and/or other processes as 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, UE120 may include: means for selecting a selection window after arrival of a packet, wherein the selection window is selected based at least in part on a delay budget associated with the packet; means for determining a control exclusion area value based at least in part on the selection window; means for performing resource selection associated with determining available resources for transmitting a set of transmissions associated with a packet based at least in part on a control exclusion area value; and so on. In some aspects, such means may include one or more components of UE120 described in conjunction with fig. 2.

As noted above, fig. 2 is provided as an example. Other examples may differ from the example described with respect to fig. 2.

In some communication systems (such as 5G or NR), a UE may communicate with other UEs using sidelink communication. For example, in an NR vehicle-to-anything (V2X) communication system, a first UE may transmit to a second UE, and the second UE may transmit to the first UE, using a distributed channel access mechanism. In a distributed channel access mechanism, resource allocation needs to be performed without the central scheduling unit providing scheduling information. In other words, the UEs need to perform resource allocation among themselves (instead of performing resource allocation by a network entity such as a base station).

The resource allocation mechanism for such a communication system should take into account the delay budget associated with a given packet, such as the Packet Delay Budget (PDB) and the hybrid automatic repeat request (HARQ) delay budget (HDB). PDB is a constraint that indicates the maximum delay between the arrival time of a packet and the last transmission time of the packet. For example, each packet that arrives (i.e., at the transmitter of the UE for transmission by the transmitter) is associated with a PDB and a number of transmissions (the number of times the packet will be sent). The PDB and number of transmissions may vary between packets depending on, for example, the application or service associated with the packet (e.g., to achieve a desired coverage or range). HDB is a constraint that indicates the maximum delay between the first transmission associated with a packet and the last transmission associated with the packet.

In some such communication systems (e.g., NR V2X communication systems) that support UEs that communicate using sidelink, reserved-only transmissions (e.g., transmissions that include only a control channel) and transmissions that include multiple reservations (e.g., transmissions that include multiple resource reservations associated with multiple future transmissions) may not be allowed. In such a case, the key constraint is that all transmissions associated with the packet should occur within the PDB. In addition, all transmissions need to occur within the HDB. Current resource allocation mechanisms for such communication systems fail to properly address these delay budget constraints.

Furthermore, in a communication system such as the NR V2X communication system, one form of sensing may be used for resource selection and resource reservation. The purpose of this sensing is to detect occupied resources so that these occupied resources can be avoided during resource selection (e.g., to prevent collisions and/or improve reliability). By control channel decoding (e.g. due to Cyclic Redundancy Check (CRC)), a reliable estimation of the occupied resources is possible. The control channel information may be used to indicate occupied and reserved (time/frequency) resources to the UE, which the UE may then avoid when performing resource selection. Here, since the UE may be configured to continuously detect and decode all control channel transmissions, the UE may be aware of ongoing transmissions, resources that have been reserved for future transmissions, the number of aggregated slots, the allocated subband frequencies, and so on. Thus, when a packet arrives and the UE needs to perform resource selection in association with sending the transmission set associated with the packet, occupied and/or reserved resources may be excluded from the selection.

The UE may be configured to determine available resources based at least in part on a Control Exclusion (CE) region. A CE region is defined as a region where application resources exclude and avoid occupied and/or reserved resources (e.g., such that occupied and/or reserved resources are not selected for transmission). The given UE transmits CE region information (e.g., information defining a CE region associated with the given UE) in a control channel (e.g., a Physical Sidelink Control Channel (PSCCH)) along with, for example, resource reservations. The CE region may be, for example, signal-based (e.g., based on Reference Signal Received Power (RSRP), etc.), distance-based (e.g., based on radial distance (in, for example, meters)), or path loss-based. Thus, all UEs receiving the control channel may decode the control channel to determine (and maintain) the resource allocation map based on the resource reservation and the indicated CE region.

One problem with using CE regions is that if there are many UEs reserving resources, the channel may become so congested that there are not enough resources available for transmission. This may result in significant delays that may result in violations of the delay budget associated with a given packet. One possible solution to address such a situation is to allow a UE to modify or scale the CE area such that the CE area indicated by another UE is changed in order to enable more resources to be considered available.

Some techniques and apparatus described herein provide resource allocation with PDB constraints. In some aspects, the UE may select a selection window after the arrival of a packet, the selection window selected based at least in part on a delay budget (e.g., PDB or HDB) associated with the packet. The UE may then determine a CE area value based at least in part on the selection window. Here, the CE area value may be determined based at least in part on the selection window. The UE may then perform resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the CE area value. Additional details are provided below.

Fig. 3A-3D are diagrams illustrating an example 300 associated with resource allocation with Packet Delay Budget (PDB) constraints in accordance with various aspects of the disclosure. In example 300, a UE (identified as UE0, which may be UE 120) has received one or more respective control channel transmissions from each UE in other groups of UEs (identified as UE1, UE2, and UE3, each of which may be UE 120). As described above, each control transmission may include information associated with resource reservations for the respective UE and information defining a CE region associated with the respective UE. For example, a control channel transmission received from UE1 may include information identifying a set of resources reserved for future transmissions by UE1 and information defining a CE region (identified as CE1) associated with UE1 (e.g., distance, signal strength, etc.). As another example, a control channel transmission received from UE2 may include information identifying a set of resources reserved for future transmissions by UE2 and information defining a CE region (identified as CE2) associated with UE 2. As yet another example, the control channel transmission received from UE3 may include information identifying a set of resources reserved for future transmissions by UE3 and information defining a CE region (identified as CE3) associated with UE 3. A UE may receive multiple control channel transmissions from a given UE, each control channel transmission identifying a resource reservation and defining a CE region.

As shown in fig. 3A and by reference numeral 302, packets may arrive at the UE (e.g., data packets (including data from a data buffer) may arrive at a transmitter of the UE for transmission by the UE). In some aspects, as described above, a packet may be associated with a PDB and/or HDB and a transmission number N (i.e., the number of times the packet is to be sent). In some aspects, the number of PDBs, HDBs, and/or transmissions may depend on the application or service associated with the packet (e.g., to achieve a desired coverage or reliability).

As shown by reference numeral 304, the UE may select a selection window (sometimes referred to as a contention window) after the packet arrives. In some aspects, the selection window may begin when a packet arrives. In some aspects, the selection window may begin after the arrival of a packet (e.g., there may be a small delay, such as a 1-to-4 slot delay, between the time of the arrival of the packet and the beginning of the selection window). The selection window is a window interval in which the UE performs resource selection in association with identifying available resources for a set of transmissions associated with the packet.

In some aspects, the UE may select the selection window based at least in part on a delay budget associated with the packet. For example, as shown in fig. 3A, the UE may select a selection window based at least in part on the PDB (e.g., the length of the selection window may match the length of the PDB). As another example, the UE may divide the smaller of the PDB and HDB by the total number of transmissions in the transmission set N (CW ═ min (PDB, HDB)/N), which results in the selection of the window. Thus, in some aspects, the UE may select the selection window based at least in part on the PDB (e.g., when the PDB is less than the HDB), while in other aspects, the UE may select the selection window based at least in part on the HDB (e.g., when the HDB is less than the PDB). As a specific example, if the PDB is 100 milliseconds (ms), the HDB is 32ms, and the number of transmissions is 4 (N-4), the UE may select the selection window to be 8ms (e.g., because 100ms >32ms, and 32 ms/4-8 ms).

As an initial operation, in some aspects, a UE performs resource selection based at least in part on a selection window and CE regions indicated by other UEs, as shown by reference numeral 306. For example, as illustrated by the right portion of fig. 3A, after a packet arrives and the UE selects a CW, the UE may determine whether there are available resources in the selection window based at least in part on a resource map maintained by the UE (e.g., based at least in part on a control channel transmission received by the UE). Here, the UE may determine whether the UE is within the CE area of the other UE such that the UE should comply with resource occupancy and/or resource reservation of the other UE.

In example 300, and referring to fig. 3B, the UE determines that the UE is within CE1 associated with UE1, CE2 associated with UE2, and CE3 associated with UE 3. As a simple example, each of CE1, CE2, and CE3 may be distance-based CE regions that indicate a distance of 1000 meters (m). Here, the UE may determine UE distance UE 1700 m, distance UE 2900 m, and distance UE 3500 m. Thus, the UE may determine that the UE is within CE1, CE2, and CE3, and thus, the UE will adhere to the resource occupancy and reservations associated with UE1, UE2, and UE3, respectively. As another example, each of CE1, CE2, and CE3 may be signal-based CE regions that indicate a signal power of-3 dBm. Here, the UE may determine that the UE1 reference signal received power is-1.5 dBm, the UE2 reference signal received power is-2.8 dBm, and the UE3 reference signal received power is-0.5 dBm. Thus, the UE may determine that the UE is within CE1, CE2, and CE3, and thus, the UE will adhere to the resource occupancy and reservations associated with UE1, UE2, and UE3, respectively.

Returning to fig. 3A, based at least in part on determining that the UE is within CE1, CE2, and CE3, the UE may attempt to determine a set of available resources in a control window. As shown by the right portion of fig. 3A, since the UE is within the CE region associated with each of UE1, UE2, and UE3, the UE may comply with resource occupancy associated with UE1, UE2, and UE3 (e.g., such that resources used or reserved for use by UE1, UE2, or UE3 are deemed unavailable). In this example, the UE may determine that there are no resources available in the selection window, as shown by reference numeral 308.

In some aspects, a UE may scale a CE area associated with one or more UEs based at least in part on a CE area value. The CE region value may be, for example, a distance value (e.g., -100m when the CE region is distance-based), a signal strength value (e.g., -3dBm when the CE region is RSRP-based), or a path loss value. In some aspects, the UE may scale one or more CE regions based at least in part on determining that there are no resources available in the upcoming selection window. Additionally or alternatively, the UE may scale one or more CE regions without determining whether resources are available in the selection window (i.e., the UE may scale the CE regions before performing resource selection).

As shown by reference numeral 310, the UE may determine a CE area value based at least in part on the selection window. In some aspects, the UE may determine a CE area value based at least in part on the selection window (e.g., the CE area value may be a statistical metric that should result in available resources for the average selection window). In some aspects, the UE may determine the CE area value based at least in part on the selection window and the historical resource occupancy information. The historical resource occupancy information includes information identifying occupied resources in a previous time period (e.g., the last 1 second, the last 10 time slots, etc.). In some aspects, the UE may determine historical resource occupancy information based at least in part on information stored by the UE (e.g., the UE may continuously maintain resource occupancy information for a previous time period).

In some aspects, the UE may determine the CE area value by: (1) splitting historical resource occupancy information based at least in part on a selection window to obtain a plurality of historical selection window intervals, (2) calculating a plurality of resource occupancy ratios, each resource occupancy ratio associated with a respective one of the plurality of historical selection window intervals, and (3) selecting a CE area value based at least in part on the plurality of resource occupancy ratios. In some aspects, the UE may identify a set of congestion intervals (e.g., the 50 most congested intervals) in a plurality of historical selection window intervals based at least in part on a plurality of resource occupancy ratios, and may select a CE area value that results in a threshold percentage of resources available in the threshold percentage set of congestion intervals. For example, as indicated in fig. 3C, the UE may select a CE area value that results in at least X% (e.g., X ═ 10, 25, etc.) of the resources available in a set of congestion intervals of Y% (e.g., Y ═ 20, 40, etc.). In some aspects, the threshold percentage of available resources is based at least in part on a total number of transmissions associated with the packet. In other words, in some aspects, X may depend on the number of transmissions N associated with the packet (e.g., because a relatively large number of transmissions may require relatively more available resources).

As illustrated by reference numeral 312, the UE may perform resource selection associated with determining available resources for transmitting a set of transmissions associated with the packet based at least in part on the CE area value. For example, as shown by the right portion of fig. 3C, after the UE determines the CE area value, the UE may apply the CE area value to CE areas associated with the UE1, the UE2, and the UE 3. Here, the UE may determine whether there are available resources in the upcoming selection window based at least in part on a resource map maintained by the UE and according to the scaled CE region. In other words, the UE may determine whether the UE is within the scaled CE region of the other UE such that the UE should comply with resource occupancy and/or resource reservation of the other UE.

In this example, and referring to fig. 3D, the UE determines that the UE is within scaled CE1 associated with UE1 and scaled CE3 associated with UE3, but the UE is not within scaled CE2 associated with UE 2. As a simple example, each of CE1, CE2, and CE3 may be distance-based CE regions, which indicate a distance of 1000m, as described above. However, if the CE area value determined by the UE indicates that the UE is to apply-125 m scaling, the UE determines whether the UE is within 875m of each of the other UEs (because 1000 m-125 m-875 m). As described above, the UE may determine the UE distance UE 1700 m, the distance UE 2900 m, and the distance UE 3500 m. Thus, the UE may determine that the UE is within scaled CE1 and scaled CE3, but the UE is outside of scaled CE 2. Thus, the UE may determine that the UE is to comply with the resource occupancy and reservations associated with UE1 and UE3, but may ignore the resource occupancy and reservations associated with UE 2.

Returning to fig. 3C, as shown by reference numeral 314, in performing the resource selection, the UE may determine a first set of available resources for a first transmission in the set of transmissions (identified as UE0(1) in the right portion of fig. 3C), and may determine a second set of available resources for a second transmission in the set of transmissions (identified as UE0(2) in the right portion of fig. 3C). In some aspects, the first set of available resources and the second set of available resources may be included in a selection window. In this way, the UE may utilize scaling of the CE region to better achieve completion of transmissions associated with a given packet within the delay budget.

In some aspects, a UE may send a first transmission in a first set of available resources, and a second set of available resources may be reserved based at least in part on control information included in the first transmission (e.g., information in a PSCCH). Similarly, in some aspects, the UE may send a second transmission in a second set of available resources. In some aspects, the third set of available resources may be reserved based at least in part on control information included in the second transmission. In some aspects, the UE may perform another resource selection (e.g., as described above) at the time of the second transmission to determine a third set of available resources. In some aspects, the resource selection performed at the time of the second transmission is only used to determine the third set of available resources (e.g., at the time of the retransmission, the above process may be repeated to identify a single set of resources instead of two sets of resources).

In some aspects, after performing resource selection, the UE may determine that a particular set of available resources (e.g., the first set of resources and/or the second set of resources) is unavailable. For example, the UE may identify a set of available resources based at least in part on performing resource selection, and may determine that the set of resources is unavailable at a later time (e.g., when the set of resources has been reserved or is currently being used by another UE). In such a case, the UE may perform resource re-evaluation (i.e., reselection) based at least in part on determining that the particular set of available resources is unavailable. In some aspects, the UE may scale the CE area value based at least in part on determining that the particular set of available resources is unavailable, and may perform resource re-evaluation based at least in part on the scaled CE area value.

In some aspects, a UE may send a first transmission in a first set of available resources. If a resource re-evaluation is subsequently triggered (e.g., when the UE later determines that the second set of available resources is not available), the UE may perform the resource re-evaluation based at least in part on the HDB associated with the packet rather than the PDB (e.g., because the initial transmission has been completed).

In some aspects, when performing resource selection (e.g., based at least in part on CE area values), the UE may determine that there are no available sets of resources in the first selection window, and may attempt to determine an available set of resources in the second selection window. In some aspects, the UE may repeat the process in additional selection windows until the threshold is met (e.g., until a threshold percentage of the delay budget has elapsed, until the UE has swept a threshold number of selection windows, etc.).

In some aspects, when performing resource selection (e.g., based at least in part on a CE area value), the UE may determine that there are no available resource sets for a threshold number of selection windows, and the UE may scale the CE area value based at least in part on determining that there are no available resource sets for the threshold number of selection windows. For example, a UE may scale CE area values (e.g., in the manner described above) in association with further modifying CE areas associated with other UEs. Here, after scaling the CE area value, the UE may attempt to determine a set of available resources in one or more selection windows based at least in part on the scaled control exclusion area value.

3A-3D are provided as examples. Other examples may differ from those described with respect to fig. 3A-3D.

Fig. 4 is a schematic diagram illustrating an example process 400 performed, for example, by a UE, in accordance with various aspects of the present disclosure. The example process 400 is an example in which a UE (e.g., UE120, etc.) performs operations associated with resource allocation with packet delay budget constraints.

As shown in fig. 4, in some aspects, process 400 may include: a selection window is selected after the packet arrives (block 410). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, etc.) may select the selection window upon arrival of a packet, as described above. In some aspects, the selection window is selected based at least in part on a delay budget associated with the packet.

As further shown in fig. 4, in some aspects, process 400 may include: a control exclusion area value is determined based at least in part on the selection window (block 420). For example, the UE (e.g., using the receive processor 258, the transmit processor 264, the controller/processor 280, the memory 282, etc.) may determine a control exclusion area value based at least in part on the selection window, as described above.

As further shown in fig. 4, in some aspects, process 400 may include: resource selection associated with determining available resources for sending a set of transmissions associated with the packet is performed based at least in part on the control exclusion area value (block 430). For example, the UE (e.g., using the receive processor 258, the transmit processor 264, the controller/processor 280, the memory 282, etc.) may perform resource selection associated with determining available resources for transmitting a transmission set associated with the packet based at least in part on the control-excluded region value, as described above.

Process 400 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, a selection window is selected based at least in part on dividing a delay budget associated with a packet by a total number of transmissions in a set of transmissions.

In a second aspect, alone or in combination with the first aspect, the delay budget is a packet delay budget.

In a third aspect, alone or in combination with one or more of the first and second aspects, the delay budget is a hybrid automatic repeat request (HARQ) delay budget.

In a fourth aspect, alone or in combination with one or more of the first through third aspects, determining the control exclusion area value comprises: splitting historical resource occupancy information based at least in part on a selection window to obtain a plurality of historical selection window intervals; calculating a plurality of resource occupancy ratios, each resource occupancy ratio of the plurality of resource occupancy ratios being associated with a respective one of a plurality of historical selection window intervals; and selecting a control exclusion area value based at least in part on the plurality of resource occupancy ratios.

In a fifth aspect, alone or in combination with one or more of the first through fourth aspects, the UE may identify a set of congestion intervals in a plurality of historical selection window intervals based at least in part on a plurality of resource occupancy ratios. Here, when selecting the control exclusion area value, the UE may select the control exclusion area value that results in a threshold percentage of resources being available in a threshold percentage of the set of congestion intervals.

In a sixth aspect, alone or in combination with one or more of the first through fifth aspects, the threshold percentage of available resources is based at least in part on a total number of transmissions associated with the packet.

In a seventh aspect, alone or in combination with one or more of the first through sixth aspects, performing resource selection comprises: determining a first set of available resources for a first transmission of a set of transmissions; and determining a second set of available resources for a second transmission of the set of transmissions.

In an eighth aspect, the first set of available resources and the second set of available resources are included in a selection window, alone or in combination with one or more of the first through seventh aspects.

In a ninth aspect, alone or in combination with one or more of the first through eighth aspects, the first and second sets of available resources are included in different selection windows.

In a tenth aspect, alone or in combination with one or more of the first through ninth aspects, the first transmission is sent in a first set of available resources. Here, the second set of available resources is reserved based at least in part on control information included in the first transmission.

In an eleventh aspect, alone or in combination with one or more of the first through tenth aspects, the second transmission is sent in a second set of available resources. Here, the third set of available resources is reserved based at least in part on control information included in the second transmission.

In a twelfth aspect, separately or in combination with one or more of the first through eleventh aspects, another resource selection is performed at the time of the second transmission to determine a third set of available resources. Here, another resource selection performed at the time of the second transmission may be used only for determining the third set of available resources.

In a thirteenth aspect, alone or in combination with one or more of the first through twelfth aspects, the UE may determine that a particular set of available resources is unavailable after performing the resource selection. Here, the particular set of available resources includes the first set of available resources and/or the second set of available resources. The UE may perform resource re-evaluation based at least in part on determining that a particular set of available resources is unavailable.

In a fourteenth aspect, alone or in combination with one or more of the first through thirteenth aspects, the UE may scale the control exclusion area value based at least in part on determining that the particular set of available resources is not available in the one or more selection windows, and in performing the resource re-evaluation, the UE may perform the resource re-evaluation based at least in part on the scaled control exclusion area value.

In a fifteenth aspect, alone or in combination with one or more of the first through fourteenth aspects, the first transmission is sent in a first set of available resources and the resource re-evaluation is performed based at least in part on a hybrid automatic repeat request (HARQ) delay budget associated with the packet based at least in part on the first transmission being sent.

In a sixteenth aspect, alone or in combination with one or more of the first to fifteenth aspects, performing resource selection comprises: determining, based at least in part on the control exclusion area value, that there is no available set of resources in the first selection window; and attempting to determine a set of available resources in the second selection window based at least in part on the control exclusion area value.

In a seventeenth aspect, alone or in combination with one or more of the first to sixteenth aspects, performing resource selection comprises: determining, based at least in part on the control exclusion area value, that there is no available set of resources in a threshold number of selection windows; scaling a control exclusion area value based at least in part on determining that there are no available resource sets in a threshold number of selection windows; and attempting to determine a set of available resources in one or more selection windows based at least in part on the scaled control exclusion area value.

Although fig. 4 shows example blocks of the process 400, in some aspects the process 400 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in fig. 4. Additionally or alternatively, two or more of the blocks of process 400 may be performed in parallel.

The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit 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, and/or a combination of hardware and software. As used herein, a processor is implemented in hardware, firmware, and/or a combination of hardware and software.

As used herein, meeting a threshold may refer to a value greater than a threshold, greater than or equal to a threshold, less than or equal to a threshold, not equal to a threshold, and/or the like, depending on the context.

It will be apparent that the systems and/or methods described herein may be implemented in different forms of hardware, firmware, and/or combinations of hardware and software. The actual specialized control hardware or software code used to implement the systems and/or methods is not limiting of various 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 if 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. Indeed, many of these features may be combined in ways not specifically recited in the claims and/or specifically disclosed in the specification. Although each dependent claim listed below may depend directly on only one claim, the disclosure of the various aspects includes a combination of each dependent claim 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 the same elements in multiples (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 ordering 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 items and unrelated items, etc.) and may be used interchangeably with "one or more. Where only one item is intended, the phrase "only one" or similar language is used. Further, as used herein, the terms "having," "has," "having," and/or 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.