阅读说明：本技术 带宽部分信令和切换 (Bandwidth portion signaling and handover ) 是由 P·P·L·洪 陈万士 P·加尔 H·李 骆涛 J·蒙托霍 于 2018-11-21 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,用户设备确定从第一带宽部分到第二带宽部分的带宽部分切换。该用户设备在确定带宽部分切换之后并且至少部分地基于以下项来从第一带宽部分转换到第二带宽部分：针对从第一带宽部分到第二带宽部分的转换而定义的临界区。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 determines a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion. The user equipment transitions from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on: a critical section defined for a transition from the first bandwidth portion to the second bandwidth portion. Numerous other aspects are provided.)

1. A method of wireless communication, comprising:

determining, by a User Equipment (UE), a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion; and

transitioning, by the UE, from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

2. The method of claim 1, wherein the bandwidth portion switch is an uplink bandwidth portion switch or a downlink bandwidth portion switch.

3. The method of claim 1, wherein the UE is configured to: determining the bandwidth part switching based at least in part on receiving a downlink control information message.

4. The method of claim 1, wherein the UE does not receive or transmit during the critical section.

5. The method of claim 1, wherein the critical section is defined from an end of a third symbol of a slot in which the UE receives a downlink control channel including a downlink control information message to a beginning of the slot indicated by an offset value identified by the downlink control information message.

6. The method of claim 1, wherein the critical section is defined for two or more of a plurality of carriers based at least in part on the bandwidth partial switch for a carrier of the plurality of carriers.

7. The method of claim 1, wherein the critical section is defined to end at a beginning of a time slot in which an uplink shared channel is scheduled.

8. The method of claim 1, wherein the critical section is defined to end at a beginning of a time slot in which a downlink shared channel is scheduled.

9. The method of claim 1, wherein the critical section is defined from a downlink control information message associated with indicating the bandwidth portion switch to an uplink shared channel.

10. The method of claim 1, wherein the critical section is defined from a bandwidth part switching transition time to a last symbol of an uplink shared channel.

11. The method of claim 1, wherein the UE is not configured to: receiving another bandwidth part switching downlink control information during the critical section.

12. The method of claim 1, wherein the UE is not configured to: receiving a scheduling downlink control information message associated with a link direction corresponding to the bandwidth portion switch during the critical section.

13. The method of claim 1, wherein the UE is configured to: discarding a downlink control information message associated with the bandwidth partial handover based at least in part on a length of time of the critical section.

14. The method of claim 1, wherein the UE is configured to: discarding sounding reference signal requests during or after the bandwidth portion switch.

15. The method of claim 1, wherein the UE is configured to: discarding periodic channel state information reports during or after the bandwidth portion switch.

16. 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:

determining a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion; and

after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

17. The UE of claim 16, wherein the bandwidth part switch is an uplink bandwidth part switch or a downlink bandwidth part switch.

18. The UE of claim 16, wherein the UE is configured to: determining the bandwidth part switching based at least in part on receiving a downlink control information message.

19. The UE of claim 16, wherein the UE does not receive or transmit during the critical section.

20. The UE of claim 16, wherein the critical section is defined from an end of a third symbol of a slot in which the UE receives a downlink control channel including a downlink control information message to a beginning of the slot indicated by an offset value identified by the downlink control information message.

21. 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:

determining a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion; and

after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

22. The non-transitory computer-readable medium of claim 21, wherein the bandwidth portion switch is an uplink bandwidth portion switch or a downlink bandwidth portion switch.

23. The non-transitory computer-readable medium of claim 21, wherein the UE is configured to: determining the bandwidth part switching based at least in part on receiving a downlink control information message.

24. The non-transitory computer-readable medium of claim 21, wherein the UE does not receive or transmit during the critical section.

25. The non-transitory computer-readable medium of claim 21, wherein the critical section is defined as from an end of a third symbol of a slot in which the UE receives a downlink control channel including a downlink control information message to a beginning of the slot indicated by an offset value identified by the downlink control information message.

26. An apparatus for wireless communication, comprising:

means for determining a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion; and

means for transitioning from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

27. The apparatus of claim 26, wherein the bandwidth portion switch is an uplink bandwidth portion switch or a downlink bandwidth portion switch.

28. The apparatus of claim 26, wherein the apparatus is configured to: determining the bandwidth part switching based at least in part on receiving a downlink control information message.

29. The apparatus of claim 26, wherein the apparatus does not receive or transmit during the critical section.

30. The apparatus of claim 26, wherein the critical section is defined from an end of a third symbol of a slot of a downlink control channel in which the apparatus receives a downlink control information message to a beginning of a slot indicated by an offset value identified by the downlink control information message.

Technical Field

Aspects of the present disclosure relate generally to wireless communications, and more specifically to techniques and apparatuses for bandwidth portion signaling and handover.

Background

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 (L TE). L TE/enhanced L TE 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 New Radio (NR), which may also be referred to as 5G, is an enhanced set of L TE 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 the new spectrum and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) (CP-OFDM) on the downlink (D L), using CP-OFDM and/or SC-FDM (e.g., also referred to as discrete Fourier transform spread Spectrum OFDM (DFT-s-OFDM)) on the uplink (U L), thereby better supporting mobile broadband Internet access, and supporting beamforming, Multiple Input Multiple Output (MIMO) antenna technology and carrier aggregation broadband access.

Disclosure of Invention

In some aspects, a method of wireless communication may comprise: a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion is determined by a User Equipment (UE). The method may include: transitioning, by the UE, from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

In some aspects, a user equipment 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: a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion is determined. The memory and the one or more processors may be configured to: after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

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 a user device, may cause the one or more processors to: a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion is determined. The one or more instructions, when executed by the one or more processors, may cause the one or more processors to: after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

In some aspects, an apparatus for wireless communication may comprise: means for determining a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion. The apparatus may include: means for transitioning from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on: a critical region defined for the transition from the first bandwidth portion to the second bandwidth portion.

Aspects include, in general, methods, apparatuses, devices, computer program products, non-transitory computer-readable media, user equipment, wireless communication devices, base stations, access points, and processing systems as substantially described herein with reference to and as illustrated by the accompanying figures 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 of the invention, 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 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 subframe format with a normal cyclic prefix, in accordance with various aspects of the present disclosure.

Fig. 5-8 are diagrams illustrating example scenarios associated with bandwidth segment management in accordance with various aspects of the present disclosure.

Fig. 9A-9D are diagrams illustrating example scenarios associated with bandwidth segment management in accordance with various aspects of the present disclosure.

Fig. 10A and 10B are diagrams illustrating example scenarios associated with bandwidth segment management in accordance with various aspects of the present disclosure.

Fig. 11A and 11B are diagrams illustrating example scenarios associated with bandwidth segment management in accordance with various aspects of the present disclosure.

Fig. 12 is a diagram illustrating an example scenario associated with bandwidth segment management in accordance with various aspects of the present disclosure.

Fig. 13 is a 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 at least in part on the teachings herein, one skilled in the art should appreciate that the scope of the present disclosure is intended to encompass 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 is 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 diagram illustrating a network 100 in which aspects of the present disclosure may be implemented, the network 100 may be an L TE network or some other wireless network (e.g., a 5G or NR network). the 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" may 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, BSs may be interconnected to each other and/or to one or more other BSs or network nodes (not shown) in wireless network 100 by various types of backhaul interfaces (e.g., direct physical connections, virtual networks, 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 referred to as an access terminal, mobile station, subscriber unit, station, etc. -a UE may be a cellular telephone (e.g., a smartphone), a Personal Digital Assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless telephone, a wireless local loop (W LL) station, a tablet device, 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)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smartmeter/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 (such as 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. A frequency may also be referred to as a carrier, a frequency channel, 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.

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 using 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.

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 TXMIMO 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.

In some aspects, one or more components of UE120 may be included in a housing. 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 bandwidth portion signaling and handover, 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 1300 of fig. 13 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 determining a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion; means for transitioning from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion switch and based at least in part on a critical section defined for transitioning from the first bandwidth portion to the second bandwidth portion; 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 by way of example only. Other examples are possible and may differ from the example described with respect to fig. 2.

FIG. 3A illustrates an example frame structure 300 for Frequency Division Duplexing (FDD) in a telecommunication system (e.g., NR). The transmission timeline for each of the downlink and uplink may be divided into units of radio frames. Each radio frame may have a predetermined duration and may be divided into a set of Z (Z ≧ 1) subframes (e.g., with indices of 0 through Z-1). The subframes may each include a set of slots (e.g., two slots per subframe are illustrated in FIG. 3A). The slots may each include a set of L symbol periods.

Although some techniques are described herein in connection with frames, subframes, slots, etc., the techniques may be equally applicable to other types of wireless communication structures, which may be referred to in the 5G NR using terms other than "frame," "subframe," "slot," etc. In some aspects, a wireless communication structure may refer to a communication unit defined by a wireless communication standard and/or protocol for periodic time. Additionally or alternatively, wireless communication fabric configurations other than those 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 for each cell supported by the base station. The PSS and SSS may be used by the UE for cell search and acquisition. For example, PSS may be used by a UE to determine symbol timing and SSS may be used by a UE to determine a physical cell identifier and frame timing associated with a base station. The base station may also transmit a Physical Broadcast Channel (PBCH). The PBCH may carry certain system information, e.g., system information supporting the UE for initial access.

In some aspects, a base station may transmit a PSS, a SSs, and/or a PBCH according to a synchronization communication hierarchy (e.g., 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 tier 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 sent 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 is_{max_SS-1}Is the maximum number of SS blocks that can be carried by an SS burst). In some aspects, different SS blocks may be beamformed in different ways. The wireless node may send the set of SS bursts periodically, such as every X milliseconds, as shown in fig. 3B. 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. Further, 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 a PSS, SSs, PBCH, and/or other synchronization signals (e.g., a 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 between each SS block of the SS burst. In some aspects, a single SS block may be included in an SS burst. In some aspects, an SS block may be at least four symbol periods in length, where each symbol carries one or more of PSS (e.g., occupies one symbol), SSs (e.g., occupies one symbol), and/or PBCH (e.g., occupies 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 block are discontinuous. 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 subframes. Additionally or alternatively, one or more SS blocks of an SS burst may be transmitted in discontinuous radio resources.

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

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

As noted above, fig. 3A and 3B are provided as examples. Other examples are possible and may differ from the examples described with respect to fig. 3A and 3B.

Fig. 4 shows an example subframe format 410 with a normal 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 real or complex valued. In some aspects, subframe format 410 may be used to transmit SS blocks carrying PSS, SSS, PBCH, etc., as described herein.

For example, Q interlaces may be defined having indices of 0 to Q-1, where Q may be equal to 4, 6,8, 10, or some other value, each interlace may include subframes that are spaced apart by Q frames.

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 (e.g., received signal strength, received signal quality, path loss, etc.). The received signal quality may be quantified by a signal-to-noise-and-interference ratio (SINR), or 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.

In aspects, NRs may utilize OFDM with CP (referred to herein as cyclic prefix OFDM or CP-OFDM) on the uplink and/or SC-FDM, may utilize CP-OFDM on the downlink and include support for half-duplex operation using Time Division Duplex (TDD), and/or may utilize discrete frequency division multiplexing (DFT-s-OFDM), may utilize CP-OFDM on the uplink and include support for half-duplex operation using CP (referred to herein as CP-OFDM) and/or may utilize discrete fourier transform spread spectrum orthogonal frequency division multiplexing (DFT-s-OFDM), may utilize CP-OFDM on the downlink and include support for half-duplex operation using CP, for example, and/or may utilize OFDM with CP on the uplink (referred to herein as CP-OFDM) and/or may utilize OFDM with sub-half-duplex operation using CP, may include high bandwidth OFDM, high bandwidth, MTC, high bandwidth, MTC, or low bandwidth, MTC, and high bandwidth, MTC, or low bandwidth, MTC, and high bandwidth, MTC, or high bandwidth, MTC, targeted for example, megabandwidth, MTC, cmdbs-OFDM, may be used on the uplink.

In some aspects, a single component carrier bandwidth of 100MHz may be supported NR resource blocks may span 12 subcarriers having a subcarrier bandwidth of 60 or 120 kilohertz (kHz) in a 0.1 millisecond (ms) duration each radio frame may include 40 subframes having a length of 10 ms.

MIMO transmission with precoding may be supported, MIMO configuration in D L may support up to 8 transmit antennas, with multiple layers of D L transmitting up to 8 streams and up to 2 streams per UE.

As noted above, fig. 4 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 4.

Fig. 5-8 are diagrams illustrating example scenarios 500, 600, 700, and 800 associated with bandwidth portion management in accordance with various aspects of the present disclosure.

The New Radio (NR) supports the use of a number of different digital schemes (e.g., subcarrier spacing options of 15kHz, 30kHz, 60kHz, 120kHz, etc.) and a number of different slot durations (e.g., 0.5ms, 0.25ms, 0.125ms, etc.). Further, the wideband bandwidth (e.g., system bandwidth, etc.) in the NR may be up to 100MHz (e.g., for frequency bands below 6 GHz), up to 400MHz (e.g., for frequency bands above 6 GHz), and so on. In some cases, there may be scenarios where the UE monitors only a subset of the broadband bandwidth or utilizes only a subset of the broadband bandwidth to serve the UE. This subset may be referred to as a bandwidth portion and may be limited due to UE capabilities, due to the UE being in a power saving mode, and so on.

For example, as shown in fig. 5, overall carrier 510 may span a wideband bandwidth, and bandwidth portion (BWP)520 may span a portion of overall carrier 510. For example, the bandwidth portion 520 may be smaller than the overall carrier 510 due to UE capabilities (such as reduced UE bandwidth capabilities). As a more specific example, the UE may be an NB-IoT UE with limited bandwidth capabilities.

As another example, and as shown in fig. 6, overall carrier 610 may span a wideband bandwidth, and first bandwidth portion (BWP1)620 may span a portion of overall carrier 610, and second bandwidth portion (BWP2)630 may span a portion of the first bandwidth portion. In this case, the first bandwidth portion 620 may represent the UE bandwidth capability and the second bandwidth portion 630 may represent the bandwidth to be monitored by or provided to the UE. For example, the UE may be able to communicate over the entire first bandwidth portion 620, but may be configured to communicate only in the second bandwidth portion 630 (e.g., for a period of time) to conserve battery power. In this case, the UE can transition between a full bandwidth configuration (where the UE monitors the first bandwidth portion 620 or is served on the first bandwidth portion 620) and a bandwidth portion configuration (where the UE monitors the second bandwidth portion 630 or is served on the second bandwidth portion 630). For example, when a UE is scheduled to transmit or receive data (e.g., a threshold amount of data), the UE may transition to a full bandwidth configuration and when the UE is not scheduled to transmit or receive data, the UE may transition to a bandwidth portion configuration to conserve battery power.

As another example, and as shown in fig. 7, overall carrier 710 may span a wideband bandwidth, which may be divided into multiple bandwidth portions, such as a first bandwidth portion (BWP1)720 and a second bandwidth portion (BWP2) 730. Bandwidth portions 720, 730 may each span a portion of the overall carrier 710. In some aspects, different bandwidth portions may be associated with different digital schemes (such as 15kHz, 30kHz, 60kHz, 120kHz, etc.). Additionally or alternatively, guard bands 740 (e.g., gaps) may be configured between different bandwidth portions to reduce interference between bandwidth portions and/or digital schemes.

As another example, and as shown in fig. 8, monolithic carrier 810 may span a wideband bandwidth, which may be divided into multiple bandwidth portions, such as a first bandwidth portion (BWP1)820 and a second bandwidth portion (BWP2) 830. Further, the overall carrier 810 may include a third bandwidth portion 840 that is not used by the UE. For example, the first bandwidth portion 820 and the second bandwidth portion 830 may be associated with the same network operator and/or may be used to support in-band carrier aggregation, while the third bandwidth portion 840 may be associated with a different network operator and/or may not be used for carrier aggregation. In some implementations, a Synchronization Signal (SS) block (e.g., comprising one or more of a PSS, SSs, PBCH, etc.) may be transmitted on one bandwidth portion and may include information for multiple bandwidth portions to conserve network resources.

In some aspects, a carrier, such as carrier 810, may comprise a bandwidth portion pair. The bandwidth part pair may comprise a downlink bandwidth part and an uplink bandwidth part sharing a common center frequency. In this case, the UE may be configured to transition between the first bandwidth part pair and the second bandwidth part pair, between the first bandwidth part of the first bandwidth part pair and the second bandwidth part of the second bandwidth part pair (without transitioning from the second bandwidth part of the first bandwidth part pair), and so on.

Although different types of bandwidth portions are described in connection with the scenarios of fig. 5-8, the techniques described herein involve signaling and switching for bandwidth portions. For example, the UE may receive an indication that the UE is to switch from the first bandwidth portion to the second bandwidth portion, and the UE may switch from the first bandwidth portion to the second bandwidth portion. In some aspects, the UE and the BS may define a critical section for a time period during which a bandwidth portion switch is to occur, and may transition from the first bandwidth portion to the second bandwidth portion based at least in part on one or more defined behaviors associated with the critical section.

As noted above, fig. 5-8 are provided as examples. Other examples are possible and may differ from the examples described in connection with fig. 5-8.

Fig. 9A-9D are diagrams illustrating an example scenario 900 of bandwidth portion signaling and handover in accordance with various aspects of the present disclosure. As shown in fig. 9A, a UE905 may communicate with a base station 910. In some aspects, the UE905 may correspond to one or more UEs described elsewhere herein, such as UE 120. Additionally or alternatively, base station 910 can correspond to one or more base stations described elsewhere herein, such as base station 110, and/or the like.

As further shown in fig. 9A and by reference numeral 915, the UE905 may determine to transition from a first bandwidth portion to a second bandwidth portion in a time division duplex communication system. For example, the UE905 may determine to transition from the first bandwidth portion to the second bandwidth portion based at least in part on receiving the downlink control information message, based at least in part on expiration of a timer, and so on. As indicated by reference numeral 920, the UE905 may transition from the first bandwidth portion to the second bandwidth portion. For example, the UE905 may transition from a first portion of a carrier associated with a first bandwidth portion to a second portion of the carrier associated with a second bandwidth portion after determining to transition and based at least in part on defined critical regions associated with one or more defined behaviors for the UE905 during the wide portion transition.

As in FIG. 9A andand as further shown by reference numeral 925, the bandwidth portion switching may occur during a defined critical section. The defined critical section may be associated with a transition timeline 930 for a downlink bandwidth portion switch. As shown, the critical region may be defined starting from a Downlink Control Information (DCI) message received by the UE905 and associated with scheduling a Physical Downlink Shared Channel (PDSCH) and triggering a bandwidth portion switch. In some aspects, the critical section may continue to an uplink control information message that includes an acknowledgement message (ACK) provided by the UE 905. In some aspects, a critical section may be associated with a set of time periods (such as a first time period k from a downlink control information message to a physical downlink shared channel allocation₀And a second time period k from physical downlink shared channel allocation to acknowledgement message₁) And (4) associating. For example, the first time period may relate to a radio frequency switching delay and the second time period may relate to a shared channel assignment.

In some aspects, a critical section may be associated with multiple time slots. For example, critical sections may be defined for: first time slot (time slot)_n) Including a portion of the first bandwidth portion (@ old BWP) and a transition period (RF switch); second time slot (time slot)_n+1) Including a portion of the second bandwidth portion (@ new BWP); third time slot (time slot)_n+2) Comprising another portion of the second bandwidth portion; and so on.

In some aspects, the UE905 may set a minimum value of the bandwidth part timer to avoid errors. For example, when the bandwidth part timer is less than a threshold (e.g., k for the downlink as described herein)₀+k₁K for the uplink₂Etc.), the bandwidth portion timer may expire during the critical section. Therefore, the UE905 may use the threshold as a minimum value for the bandwidth part timer to avoid triggering another bandwidth part switch during the bandwidth part switch. In some aspects, the UE905 may start the critical section based at least in part on the bandwidth part timer to avoid collision with a downlink control information message that triggers the bandwidth part switch. In some aspects, the UE905 may trigger a UE to targetThe bandwidth part of the bandwidth part pair (e.g., paired uplink bandwidth part and downlink bandwidth part) is switched.

Although the defined critical sections described herein may be described in terms of a single serving cell for a UE (e.g., UE 905), the critical sections may be for UEs associated with multiple bandwidth portions for multiple cells (e.g., for carrier aggregation). For example, when there is a bandwidth portion switch on a first carrier, critical sections may be defined for one or more second carriers. In this case, the critical section may be applied to the first carrier, the one or more second carriers, and the like.

As shown in fig. 9B, the defined critical section may be associated with a transition timeline 935 for uplink bandwidth portion switching. As shown, the critical section may be defined starting from a Downlink Control Information (DCI) message received by the UE905 and associated with scheduling a Physical Uplink Shared Channel (PUSCH) and triggering a bandwidth portion switch. In some aspects, the critical section may continue to a Physical Uplink Shared Channel (PUSCH) allocated for the UE 905. In some aspects, the critical section may relate to a time period k from a downlink control information message to a transition to the second bandwidth portion and related to a radio frequency handover delay₂And (4) associating. In some aspects, a critical section may be associated with multiple time slots. For example, critical sections may be defined for: first time slot (time slot)_n) Including a portion of the first bandwidth portion (@ old BWP), a transition period (RF switch); second time slot (time slot)_n+1) Including a portion of the second bandwidth portion (@ new BWP); and so on.

As shown in fig. 9C, the defined critical section may be associated with a transition timeline 930' for downlink bandwidth portion switching. For example, the UE905 may receive multiple downlink control information messages associated with multiple downlink shared channel allocations. In some aspects, a critical section may include a plurality of time slots, such as: first time slot (time slot) of first bandwidth part_n) A first downlink control information message and a first Physical Downlink Shared Channel (PDSCH); second time slot (time slot) of the first bandwidth part_n+1) For a second downlink control information message and a second PDSCH; third time slot (time slot) for transition period_n+2) (ii) a One or more fourth time slots (time slots) for the second bandwidth part_n+3Time slot_n+4Time slot_n+5Etc.); and so on. In some aspects, the plurality of downlink control information messages may include a first downlink control information message associated with triggering a bandwidth portion switch. For example, the UE905 may receive a downlink control information message identifying the second bandwidth portion, which may trigger the UE905 to transition to the second bandwidth portion.

In some aspects, the plurality of downlink control information messages may include a second downlink control information message received after the first downlink control information message. For example, the UE905 may receive a second downlink control information message identifying the first bandwidth portion prior to the radio frequency handover (e.g., to allocate PDSCH for the first bandwidth portion prior to the RF handover) and may continue to transition to the second bandwidth portion after receiving PDSCH in the first bandwidth portion. Alternatively, the UE905 may receive a second downlink control information message identifying the second bandwidth portion prior to the RF handover. The UE905 may discard the second downlink control information message based at least in part on the bandwidth portion collision during the critical section. In some aspects, the UE905 may receive a second downlink control information message after the radio frequency handover during the critical section. In this case, the UE905 may decode the second downlink control information message, such as to determine a grant for use in the second bandwidth portion.

As shown in fig. 9D, the defined critical section may be associated with a transition timeline 935' for uplink bandwidth portion switching. For example, the UE905 may receive multiple downlink control information messages associated with multiple downlink shared channel allocations. Similar to the downlink bandwidth part switching described with respect to fig. 9C, when the second downlink control information message is not associated with an appropriate bandwidth part (e.g., a first bandwidth part before the RF switch, and a second bandwidth part after the RF switch), the UE905 may discard the second downlink control information message due to the collision, may decode the grant in the second downlink control information message and discard the instruction regarding the bandwidth part switching due to the collision, and so on. After completion of the critical section, the UE905 may allow another bandwidth portion to switch, thereby avoiding errors, etc., related to providing acknowledgement messages on the unmonitored bandwidth portions. In this way, the UE905 improves bandwidth portion signaling and handover relative to another technique without a defined critical section.

As noted above, fig. 9A-9D are provided as examples. Other examples are possible and may differ from the examples described with respect to fig. 9A-9D.

Fig. 10A and 10B are diagrams illustrating an example scenario 1000 of bandwidth portion signaling and handover in accordance with various aspects of the present disclosure. As shown in fig. 10A, UE1005 may communicate with base station 1010. In some aspects, UE1005 may correspond to one or more UEs described elsewhere herein, such as UE 120. Additionally or alternatively, base station 1010 can correspond to one or more base stations described elsewhere herein, such as base station 110, and/or the like.

As further shown in fig. 10A and by reference numeral 1015, the UE1005 may determine to transition from the first bandwidth portion to the second bandwidth portion in a frequency division duplex communication system having a first frequency band and a second frequency band. For example, based at least in part on receiving the downlink control information message, based at least in part on expiration of a timer, and/or the like, the UE1005 may determine to transition from the first bandwidth portion of the first frequency band to the second bandwidth portion of the second frequency band. As indicated by reference numeral 1020, the UE1005 may transition from the first bandwidth portion to the second bandwidth portion. For example, the UE1005 may transition from the first bandwidth portion to the second bandwidth portion after determining to transition and based at least in part on defined critical regions associated with one or more defined behaviors for the UE1005 during the wide portion transition.

As shown in fig. 10A and further by reference numeral 1025, bandwidth portion switching may occur during defined critical sections. Definition ofMay be associated with a transition timeline 1030 for downlink bandwidth portion switching. As shown, the critical region may be defined starting from a Downlink Control Information (DCI) message received by UE1005 and associated with triggering a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion. In some aspects, the critical section may continue to an uplink control information message that includes an acknowledgement message (ACK) provided by UE 1005. In some aspects, a critical section may be associated with a set of time periods (such as a first time period k from a downlink control information message to a physical downlink shared channel allocation₀And a second time period k from physical downlink shared channel allocation to acknowledgement message₁) And (4) associating. For example, the first time period may relate to a radio frequency switching delay and the second time period may relate to a shared channel allocation.

In some aspects, a critical section may be associated with multiple time slots. For example, critical sections may be defined for: first time slot (time slot)_n) Including a portion of the first bandwidth portion (@ old BWP) and a transition period (RF switch); second time slot (time slot)_n+1) Including a portion of the second bandwidth portion (@ new BWP); third time slot (time slot)_n+2) Comprising another portion of the second bandwidth portion; and so on.

As shown in fig. 10B, the defined critical section may be associated with a shortened transition timeline 1035 for uplink bandwidth portion switching. As shown, the critical section may be defined starting from a Downlink Control Information (DCI) message received by UE1005 and associated with triggering a bandwidth portion switch. In some aspects, the critical section may continue to a Physical Uplink Shared Channel (PUSCH) allocated for UE 1005. In some aspects, the critical section may relate to a time period k from a downlink control information message to a transition to the second bandwidth portion and related to a radio frequency handover delay₂And (4) associating. In some aspects, a critical section may be associated with multiple time slots. For example, critical sections may be defined for: first time slot (time slot)_n) Including a portion of the first bandwidth portion (@ old BWP), a transition period (RF switch); second time slot (time slot)_n+1) Including a portion of the second bandwidth portion (@ new BWP); and so on.

In some aspects, the UE1005 may be configured with a transition timeline 1030 instead of transition timeline 1035 for frequency division duplexing in uplink bandwidth portion switching, downlink bandwidth portion switching, etc., to avoid errors related to conflicting uplink and downlink bandwidth portion messaging. For example, using the shortened critical section associated with transition timeline 1035, UE1005 may receive collision messages on the downlink and uplink, respectively, associated with concurrent receiver and transmitter operations by UE 1005. In this case, UE1005 and BS 1010 may determine to avoid concurrent receiver and transmitter operations when granting to trigger a bandwidth portion switch and when using a shortened critical region. In some aspects, when using a shortened critical region, the BS 1010 may use stored information identifying timing for the bandwidth portion switch to avoid collisions. In this way, UE1005 and BS 1010 may reduce the likelihood of errors relative to another technique that uses shortened critical sections.

In some aspects, BS 1010 and UE1005 may only allow a single bandwidth partial handover for frequency division duplexing during the critical section. Additionally or alternatively, BS 1010 and UE1005 may allow multiple concurrent bandwidth portion handovers for frequency division duplexing. For example, the UE1005 may perform the uplink bandwidth part switching and the downlink bandwidth part switching concurrently. In this case, when k is₂And k₀When there is a threshold amount of difference, BS 1010 may detect a downlink control information message associated with an uplink grant (U L DCI message) from UE1005 on the first bandwidth portion₂And k₀Without a threshold amount of difference, BS 1010 may attempt to detect an Acknowledgement (ACK) message from UE1005 on the first and second bandwidth portions using a blind detection procedure.

As noted above, fig. 10A and 10B are provided as examples. Other examples are possible and may differ from the example described with respect to fig. 10A and 10B.

Fig. 11A and 11B are diagrams illustrating an example scenario 1100 of bandwidth portion signaling and handover in accordance with various aspects of the present disclosure. As shown in fig. 11A, a UE1105 may communicate with a base station 1110. In some aspects, UE1105 may correspond to one or more UEs described elsewhere herein, such as UE120 or the like. Additionally or alternatively, base station 1110 can correspond to one or more base stations described elsewhere herein, such as base station 110, and/or the like.

As further shown in fig. 11A and by reference number 1115, the UE1105 may determine to transition from a first bandwidth portion to a second bandwidth portion in, for example, a time division duplex communication system. For example, the UE1005 may determine to transition from the first bandwidth portion to the second bandwidth portion based at least in part on receiving the downlink control information message, based at least in part on expiration of a timer, and/or the like. As indicated by reference numeral 1120, the UE1105 may transition from the first bandwidth portion to the second bandwidth portion. For example, the UE1105 may transition from the first bandwidth portion to the second bandwidth portion after determining to transition and based at least in part on defined critical regions associated with one or more defined behaviors for the UE1105 during the bandwidth portion transition.

As further shown in fig. 11A and by reference numeral 1125, a bandwidth portion switch may occur during a defined critical section. The defined critical section may be associated with transition timeline 1130 for downlink bandwidth portion switching. As shown, the critical section may be defined starting from a Downlink Control Information (DCI) message received by the UE1105 and associated with triggering a bandwidth portion switch. In some aspects, the critical section may continue to an uplink control information message that includes an acknowledgement message (ACK) provided by the UE 1105. In some aspects, a critical section may be associated with a set of time periods (such as a first time period k)₀And a second period k₁) And (4) associating.

In some aspects, the UE1105 may receive a downlink control information message associated with triggering a bandwidth portion switch and having no resource allocation (e.g., for a physical downlink shared channel). In some aspects, there is noIn the case of resource allocation, the UE1105 may be based at least in part on k₀And k₁To define critical sections. For example, if a resource allocation has been provided for a physical downlink shared channel, the UE1105 may determine to be allocated for k₀And k₁And the time period can be used for critical sections. In this case, k₀And k₁Indicating a delay from the reception of the downlink control information message to the acknowledgement message.

As shown in fig. 11B and by transitioning timeline 1135, UE1105 may be based at least in part on k₀Instead of k₁To define critical sections. For example, based at least in part on determining that no physical downlink shared channel processing time is needed (e.g., based at least in part on not providing a physical downlink shared channel assignment in the downlink control information message), the UE1105 may not allocate time for physical downlink shared channel processing for the critical zone. In this case, critical sections may occur in a shortened time period relative to critical sections of conversion timeline 1130.

In some aspects, the UE1105 may determine to send an acknowledgement message on a first bandwidth portion and may delay a bandwidth portion switch based at least in part on receiving a downlink control information message without a resource allocation. In some aspects, the UE1105 may not perform a bandwidth partial handover based at least in part on receiving a downlink control information message without a resource allocation. For example, for uplink bandwidth part switching, the UE1105 may not perform bandwidth part switching after receiving a downlink control information message without resource allocation, thereby avoiding errors associated with failure to send an acknowledgement message.

In some aspects, such as for frequency division duplexing, the UE1105 may determine to switch from the first bandwidth portion to the second bandwidth portion on a downlink, on an uplink, on both a downlink and an uplink (e.g., for paired bandwidth portions), and so on based at least in part on a received downlink control information message. For example, with respect to a downlink control information message without a resource allocation, the UE1105 may determine that a field (e.g., a modulation and control scheme field, a redundancy version field, a hybrid automatic repeat request field, etc.) is reused to identify an uplink bandwidth portion. In this case, the UE1105 may use a configured uplink control channel (e.g., a physical uplink control channel) to provide an acknowledgement for the downlink control information message.

As noted above, fig. 11A and 11B are provided as examples. Other examples are possible and may differ from the example described with respect to fig. 11A and 11B.

Fig. 12 is a diagram illustrating an example scenario 1200 of bandwidth portion signaling and handover in accordance with various aspects of the present disclosure. As shown in fig. 12, a UE1205 may communicate with a base station 1210. In some aspects, UE1205 may correspond to one or more UEs described elsewhere herein, such as UE 120. Additionally or alternatively, base station 1210 can correspond to one or more base stations described elsewhere herein, such as base station 110, and/or the like.

As further shown in fig. 12 and by reference numeral 1215, the UE1205 may determine to transition from the first bandwidth portion to the second bandwidth portion. For example, based at least in part on receiving the downlink control information message, the UE1205 may determine to transition from the first bandwidth portion to the second bandwidth portion. In this case, the UE1205 may be configured to receive the downlink control information message during the first three OFDM symbols of the slot. In some aspects, the BS 1210 may be configured to not provide the plurality of downlink control information messages, and the UE1205 may be configured to not receive the plurality of downlink control information messages. For example, UE1205 may be configured to receive a single downlink control information message in a single time slot that triggers a bandwidth portion switch. In some aspects, for the paired spectrum case, UE1205 may be configured to receive up to two downlink control information messages (up to one for each link direction) that trigger a bandwidth portion switch in a single time slot. Additionally or alternatively, the UE1205 may be configured such that a single downlink control information message that triggers a bandwidth part switch is active (e.g., a downlink control information message that does not trigger multiple bandwidth part switches concurrently).

In some aspects, the UE1205 and the BS 1210 may utilize handshake exchange to synchronize initiation and completion of the bandwidth portion handover. For example, when using the first downlink control information message format, the BS 1210 can acknowledge the bandwidth portion switch based at least in part on receiving an acknowledgement message from the UE1205 for the downlink shared channel. Additionally or alternatively, for the second downlink control information message format, the BS 1210 can acknowledge the bandwidth part switch based at least in part on decoding an uplink shared channel in the bandwidth part to which the UE1205 was switched.

As further shown in fig. 12 and by reference numeral 1220, the UE1205 may transition from the first bandwidth portion to the second bandwidth portion. For example, the UE1205 may transition from the first bandwidth portion to the second bandwidth portion after determining to transition and based at least in part on defined critical regions associated with one or more defined behaviors for the UE1205 during the wide portion transition.

As further shown in fig. 12 and by reference numeral 1225, the bandwidth portion switching may occur during defined critical sections. The defined critical section may be associated with a transition timeline 1230 for a downlink bandwidth portion switch. As shown, the critical section may be defined (i.e., validated) starting from a Downlink Control Information (DCI) message received by the UE1205 and associated with triggering a bandwidth portion switch. Additionally or alternatively, the critical region may be defined starting from the last OFDM symbol of the PDCCH transmitting the downlink control information message. Additionally or alternatively, the critical section may be defined from the beginning of a subframe or half subframe immediately after expiration of the bandwidth portion timer. In some aspects, critical sections may be defined to take effect from the beginning of the bandwidth portion switch transition time.

In some aspects, the critical section may continue (i.e., take effect) until the UE1205 provides an uplink control information message that includes an acknowledgement message (ACK). Additionally or alternatively, critical sections may be defined to continue until k₀(e.g., for downlink bandwidth partial handover) or k₂(for uplink bandwidth portion switching) to the start of the indicated time slot. Additionally or alternatively, the critical region may be defined to continue until a time slot during which UE1205 may receive downlink signals or transmit uplink signals. In some aspects, a critical section may be defined to take effect until the end of the last symbol of an acknowledgement message corresponding to a downlink shared channel scheduled using a downlink control information message that triggers a bandwidth portion switch. In some aspects, a critical section may be defined to be valid until the end of the last symbol of the uplink shared channel scheduled using a downlink control information message that triggers a bandwidth portion switch.

In some aspects, during the critical section, the UE1205 may not receive another downlink control information message that triggers the bandwidth portion switch, scheduling downlink control information associated with the link direction in which the bandwidth portion switch is occurring, and the like. In some aspects, the UE1205 may be configured to not transmit uplink signals during critical regions (e.g., during a bandwidth portion handover). Similarly, the BS 1210 may be configured not to transmit downlink signals during the critical section, and the UE1205 may be configured not to receive downlink signals during the critical section.

In some aspects, a critical section may be associated with a set of time periods (such as a first time period k)₀A second period k₁A third time period k₂Etc.). In some aspects, when the time period (e.g., k) is to be measured₀Or k₂) Defined as being less than a threshold (e.g., an amount less than a delay to accommodate the bandwidth part switch), UE1205 may discard the downlink control information message that triggered the bandwidth part switch and may not complete the bandwidth part switch.

In some aspects, the UE1205 may discard the scheduled transmission based at least in part on the occurrence of the bandwidth portion switch. For example, the UE1205 may drop the downlink shared channel when the bandwidth portion switch begins after the downlink control information message for the scheduled downlink and before the downlink shared channel (e.g., PDSCH) scheduled by the downlink control information message for the scheduled downlink. Additionally or alternatively, the UE1205 can drop the uplink shared channel when the bandwidth portion switching begins after the downlink control information message scheduling the uplink and before the uplink shared channel (e.g., PUSCH) scheduled by the downlink control information message scheduling the uplink.

In some aspects, the UE1205 may discard aperiodic or semi-persistent channel state information messages scheduled before the bandwidth portion switch to occur after the bandwidth portion switch. In some aspects, the UE1205 may discard sounding reference signals requested to occur during a wide portion handover, after a wide portion handover, during critical sections, after critical sections, and so on. In some aspects, the UE1205 may forgo reporting channel state information when uplink control channel (e.g., PUCCH) resources for periodic channel state information report messages or semi-persistent channel state information report messages are unavailable during a partial bandwidth switch or after a partial bandwidth switch. In some aspects, the UE1205 may forgo sending an acknowledgement message for a downlink shared channel (e.g., PDSCH) transmission of the downlink bandwidth portion after the bandwidth portion switch (e.g., uplink bandwidth portion switch or downlink bandwidth portion switch).

As noted above, fig. 12 is provided as an example. Other examples are possible and may differ from the example described with respect to fig. 12.

Diagram 1300 is a diagram illustrating an example process 1300, e.g., performed by a UE, in accordance with various aspects of the present disclosure. Example process 1300 is an example in which a UE (e.g., UE120, UE905, UE1005, UE1105, UE1205, etc.) performs bandwidth part signaling and handover.

As shown in fig. 13, in some aspects, process 1300 may include: a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion is determined (block 1310). For example, as described above, the UE (e.g., using controller/processor 280) may determine a bandwidth portion switch from a first bandwidth portion to a second bandwidth portion.

As further shown in fig. 13, in some aspects, process 1300 may include: after determining the bandwidth portion switch and based at least in part on a critical region defined for a transition from the first bandwidth portion to the second bandwidth portion, a transition is made from the first bandwidth portion to the second bandwidth portion (block 1320). For example, as described above, the UE (e.g., using antennas 252, DEMOD254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, MOD254, antennas 252, controller/processor 280, etc.) may transition from the first bandwidth portion to the second bandwidth portion after determining the bandwidth portion transition and based at least in part on a critical region defined for transitioning from the first bandwidth portion to the second bandwidth portion.

Process 1300 may include additional aspects, such as any single aspect and/or any combination of aspects described below and/or in conjunction with one or more other processes described elsewhere herein.

In some aspects, the bandwidth portion switch is an uplink bandwidth portion switch or a downlink bandwidth portion switch. In some aspects, the UE is configured to: determining the bandwidth part switching based at least in part on receiving a downlink control information message. In some aspects, the UE does not receive or transmit during the critical section. In some aspects, the critical section is defined from an end of a third symbol of a slot in which the UE receives a downlink control channel including a downlink control information message to a beginning of the slot indicated by an offset value identified by the downlink control information message.

In some aspects, the critical section is defined for at least one carrier of a plurality of carriers. In some aspects, the critical section is defined to end at the beginning of a time slot in which the uplink shared channel is scheduled. In some aspects, the critical section is defined to end at the beginning of a time slot in which the downlink shared channel is scheduled. In some aspects, the UE is configured to: discarding periodic channel state information reports during or after the bandwidth portion switch.

In some aspects, the UE is operating in a time division duplex or frequency division duplex communication system. In some aspects, the bandwidth portion switching is related to at least one of a downlink grant or an uplink grant. In some aspects, the wide portion switch will not occur concurrently with another wide portion switch.

In some aspects, the time slot includes an indication of the bandwidth portion switch and does not include another indication of another bandwidth portion switch for the same link direction. In some aspects, the critical section is defined from a downlink control information message associated with indicating the bandwidth portion switch to an uplink control information message including an acknowledgement. In some aspects, the critical section is defined as the last symbol of the acknowledgement from the bandwidth portion switch transition time.

In some aspects, the critical section is defined from a downlink control information message associated with indicating the bandwidth portion switch to an uplink shared channel. In some aspects, the critical section is defined as starting from a bandwidth part switching transition time to a last symbol of the uplink shared channel. In some aspects, the UE is not configured to: receiving another bandwidth part switching downlink control information during the critical section.

In some aspects, the UE is not configured to: receiving a scheduling downlink control information message associated with a link direction corresponding to the bandwidth portion switch during the critical section. In some aspects, the UE is configured to: discarding a downlink control information message associated with the bandwidth partial handover based at least in part on a length of time of the critical section. In some aspects, the bandwidth part switch is a downlink bandwidth part switch and is started after a downlink control information message scheduling the downlink and before a corresponding downlink shared channel, and wherein the UE is configured to: discarding the downlink shared channel based at least in part on the bandwidth partial switch not being triggered by downlink control information of the scheduled downlink.

In some aspects, the bandwidth part switch is an uplink bandwidth part switch and is started after a downlink control information message scheduling an uplink and before a corresponding uplink shared channel, and wherein the UE is configured to: discarding the uplink shared channel based at least in part on the bandwidth portion switch not being triggered by downlink control information of the scheduled uplink. In some aspects, the UE is configured to: discarding sounding reference signal requests during or after the bandwidth portion switch. In some aspects, the UE is configured to: discarding periodic channel state information reports during or after the bandwidth portion switch.

In some aspects, the UE is configured to: not sending an acknowledgement message corresponding to a downlink shared channel transmission of a downlink bandwidth portion prior to the bandwidth portion switch. In some aspects, a first downlink control information message is received to trigger the bandwidth portion switch, and a second downlink control information message received after the first downlink control information message and during the critical section is associated with the second bandwidth portion. In some aspects, a first downlink control information message is received to trigger the bandwidth portion switch, and a second downlink control information message received after the first downlink control information message and during the critical section is associated with the first bandwidth portion and discarded.

In some aspects, a first downlink control information message is received to trigger the bandwidth part switch, and a second downlink control message is received before the bandwidth part switch. In some aspects, another bandwidth portion switch occurs after the critical section is completed. In some aspects, the critical section is defined from a downlink control information message associated with indicating the bandwidth portion switch to a downlink shared channel.

In some aspects, the downlink grant and the uplink grant can trigger a respective bandwidth portion switch during the critical section. In some aspects, a message from the UE may be detected in the first bandwidth portion and the second bandwidth portion. In some aspects, a message from the UE may be detected in the first bandwidth portion but not the second bandwidth portion.

In some aspects, the bandwidth portion switch is triggered without resource allocation. In some aspects, the critical section is defined as having time slots for unallocated downlink shared channels. In some aspects, the critical section is defined as having no at least a portion of time slots for unallocated downlink shared channels.

In some aspects, acknowledgements are provided on the first bandwidth portion, and the bandwidth portion switching is delayed for an acknowledgement period. In some aspects, a bandwidth portion timer associated with the first bandwidth portion is associated with a threshold minimum. In some aspects, the bandwidth portion switch is triggered based at least in part on a timer.

Although fig. 13 shows example blocks of the process 1300, in some aspects the process 1300 may include additional blocks, fewer blocks, different blocks, or blocks arranged in a different manner than those depicted in fig. 13. Additionally or alternatively, two or more of the blocks of process 1300 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, 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, satisfying 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 the like.

It will be apparent that the systems and/or methods described herein may be implemented in various forms of hardware, firmware, 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 description, these combinations are not intended to limit the disclosure of possible 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 possible 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 any combination of a, b, c, a-b, a-c, b-c, and a-b-c, as well as multiples of the same element (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 term "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.