Scheduling and bandwidth fractional adaptation techniques for extended reality

Abstract

Certain aspects of the present disclosure provide techniques for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). A method that may be performed by a user equipment (UE) includes obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for receiving a first transmission on the BWP; changing at least one of the following: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay or changing the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. application No. 17 / 228,036, filed on April 12, 2021, which claims the benefit of and priority to U.S. Provisional Patent Application No. 63 / 009,411, filed on April 13, 2020, and the entire contents of the above applications are hereby incorporated by reference. Technical Field

[0003] Aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). Background Art

[0004] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts. These wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple-access systems include the Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, the Advanced LTE (LTE-A) system, the Code Division Multiple Access (CDMA) system, the Time Division Multiple Access (TDMA) system, the Frequency Division Multiple Access (FDMA) system, the Orthogonal Frequency Division Multiple Access (OFDMA) system, the Single Carrier Frequency Division Multiple Access (SC-FDMA) system, and the Time Division Synchronous Code Division Multiple Access (TD-SCDMA) system, to name a few.

[0005] In some examples, a wireless multiple-access communication system may include multiple base stations (BSs), each of which is capable of simultaneously supporting communication for multiple communication devices (also referred to as user equipment (UE)). In an LTE or LTE-A network, a set of one or more BSs may define an evolved Node B (eNB). In other examples (e.g., in next-generation, new radio (NR) or 5G networks), a wireless multiple-access communication system may include multiple distributed units (DUs) (e.g., edge units (EUs), edge nodes (ENs), radio heads (RHs), smart radio heads (SRHs), transmit receive points (TRPs), etc.) in communication with multiple central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), where the set of one or more DUs in communication with the CUs may define an access node (e.g., which may be referred to as a BS, next-generation Node B (gNB or gNodeB), TRP, etc.). A BS or DU may communicate with a set of UEs on downlink (DL) channels (eg, for transmissions from the BS or DU to the UE) and uplink (UL) channels (eg, for transmissions from the UE to the BS or DU).

[0006] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at a city level, a national level, a regional level, and even a global level. New radio (e.g., fifth generation (5G) NR) is an example of an emerging telecommunication standard. NR is a collection of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband Internet access by improving spectral efficiency, reducing costs, improving services, utilizing new spectrum, and better integrating with other open standards using OFDMA with cyclic prefix (CP) on the DL and on the UL. To these ends, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0007] However, as the demand for mobile broadband access continues to grow, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should also apply to other multiple access technologies and the telecommunication standards that employ them. Summary of the Invention

[0008] The systems, methods, and devices of the present disclosure each have several aspects, no single one of which is solely responsible for its desirable attributes. Without limiting the scope of the present disclosure as expressed by the appended claims, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description," a skilled artisan will understand how the features of the present disclosure provide advantages, including power savings for devices that perform extended reality (XR) functions using wireless communication.

[0009] Certain aspects provide a method for wireless communication performed by a user equipment (UE). In general terms, the method includes obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for receiving a first transmission on a bandwidth part (BWP); changing at least one of: changing the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay or changing the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0010] Certain aspects provide a method for wireless communication performed by a network entity. In general terms, the method includes obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for sending a first transmission to a UE on a BWP; changing the at least one of the following for the first transmission to the UE: changing the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay or changing the bandwidth on the BWP to a new bandwidth; and sending the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0011] Certain aspects provide an apparatus for wireless communication. Generally speaking, the apparatus includes a processor configured to: obtain an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for receiving a first transmission on a BWP; change at least one of: the minimum control channel to data channel delay to a new minimum control channel to data channel delay or the bandwidth on the BWP to a new bandwidth; and receive the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP; and a memory coupled to the processor.

[0012] Certain aspects provide an apparatus for wireless communication. Generally speaking, the apparatus includes a processor configured to: obtain an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for sending a first transmission to a UE on a BWP; change the at least one of the following for the first transmission to the UE: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay or changing the bandwidth on the BWP to a new bandwidth; and sending the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP; and a memory coupled to the processor.

[0013] Certain aspects provide an apparatus for wireless communication. Generally speaking, the apparatus includes: means for obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for receiving a first transmission on a BWP; means for changing at least one of: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay or changing the bandwidth on the BWP to a new bandwidth; and means for receiving the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0014] Certain aspects provide an apparatus for wireless communication. In general, the apparatus includes: means for obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for sending a first transmission to a UE on a BWP; means for changing at least one of the following for the first transmission to the UE: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay or changing the bandwidth on the BWP to a new bandwidth; and means for sending the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0015] Certain aspects provide a computer-readable medium for wireless communications. The computer-readable medium includes instructions that, when executed by a processing system, cause the processing system to perform operations, generally comprising: obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for receiving a first transmission on a BWP; changing at least one of: the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay or the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0016] Certain aspects provide a computer-readable medium for wireless communications. The computer-readable medium includes instructions that, when executed by a processing system, cause the processing system to perform operations, generally comprising: obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for sending a first transmission to a UE on a BWP; changing at least one of the following for the first transmission to the UE: changing the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay or changing the bandwidth on the BWP to a new bandwidth; and sending the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0017] To accomplish the foregoing and related ends, one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims. The following description and the accompanying drawings set forth in detail certain illustrative features of one or more aspects. However, these features are indicative of only a few of the various ways in which the principles of the various aspects may be employed. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order that the manner in which the above-recited features of the present disclosure may be understood in detail, a more particular description (briefly summarized above) may be made by reference to various aspects, some of which are illustrated in the drawings. It is to be noted, however, that the drawings illustrate only certain typical aspects of the present disclosure and are not therefore to be considered limiting of its scope, as the description may admit to other equally effective aspects.

[0019] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0020] Figure 2 is a block diagram conceptually illustrating designs of example base stations (BSs) and user equipment (UEs) in accordance with certain aspects of the present disclosure.

[0021] Figure 3 is an example frame format for certain wireless communication systems (e.g., New Radio (NR)) in accordance with certain aspects of the present disclosure.

[0022] Figure 4 is a block diagram illustrating an example architecture of a core network (CN) in communication with a radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0023] Figure 5 is a table illustrating various fifth generation (5G) quality indicators according to certain aspects of the present disclosure.

[0024] Figure 6 is a table illustrating various use cases for extended reality (XR) according to certain aspects of the present disclosure.

[0025] Figure 7 A wireless communication system for XR is shown in accordance with certain aspects of the present disclosure.

[0026] Figure 8 Three transmission timelines are shown, in accordance with certain aspects of the present disclosure.

[0027] Figure 9 is a flow diagram illustrating example operations for wireless communications by a UE, in accordance with certain aspects of the present disclosure.

[0028] Figure 10 is a flow diagram illustrating example operations for wireless communications by a BS, in accordance with certain aspects of the present disclosure.

[0029] Figure 11 Two example transmission timelines illustrating a UE performing a micro-sleep are shown, in accordance with certain aspects of the present disclosure.

[0030] Figure 12A communications device according to certain aspects of the present disclosure is shown, which may include various components configured to perform operations for the techniques disclosed herein.

[0031] Figure 13 A communications device according to certain aspects of the present disclosure is shown, which may include various components configured to perform operations for the techniques disclosed herein.

[0032] To facilitate understanding, identical reference numerals have been used, where possible, to designate identical elements that are common to the figures. It is contemplated that elements disclosed in one aspect may be beneficially utilized on other aspects without specific recitation. DETAILED DESCRIPTION

[0033] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). In various aspects of the present disclosure, XR technology allows interaction between activities in a virtual environment and a real environment. XR includes augmented reality (AR), mixed reality (MR), and virtual reality (VR). An XR device is a mobile device (e.g., smart glasses, watches, or cellular phones) that can support wireless data exchange with a server. XR applications can support dynamic reconstruction of 3D environments and / or the fusion of real and virtual environments. XR applications may require high-quality video data and very low latency. Since XR devices can be wearable and mobile, it is expected that XR devices can have good battery life (e.g., one day) and avoid overheating so that users will have a good experience.

[0034] The following description provides examples of techniques for improving downlink (DL) wireless data transmission for XR applications to increase the power efficiency of those DL wireless data transmissions and XR applications in wireless communication systems. Changes may be made in the functionality and arrangement of the elements discussed without departing from the scope of this disclosure. Various examples may omit, substitute, or add various processes or components as appropriate. For example, the methods described may be performed in an order different from that described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined in some other examples. For example, an apparatus may be implemented or a method may be practiced using any number of the aspects set forth herein. Furthermore, the scope of this disclosure is intended to encompass such apparatuses or methods implemented using other structures, functions, or both in addition to or different from the various aspects of the disclosure set forth herein. It should be understood that any aspect of the disclosure disclosed herein may be embodied by one or more elements of the claims. The word "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any aspect described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other aspects.

[0035] In general, any number of wireless networks can be deployed in a given geographic area. Each wireless network can support a specific radio access technology (RAT) and can 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, subcarrier, frequency channel, tone, subband, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks with different RATs.

[0036] The techniques described herein can be used for various wireless networks and radio technologies. Although various aspects may be described herein using terms typically associated with 3G, 4G, and / or new radio (e.g., 5G NR) wireless technologies, various aspects of the present disclosure can be applied to communication systems based on other generations.

[0037] NR access (e.g., 5G technology) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or above), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or above), massive machine type communication MTC (mMTC) targeting non-backward compatible MTC technology, and / or mission critical targeting ultra-reliable low latency communication (URLLC). These services may include latency and reliability requirements. These services may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. In addition, these services can coexist in the same subframe.

[0038] The electromagnetic spectrum is typically subdivided into various categories, bands, channels, etc. based on frequency / wavelength. In 5G NR, two initial operating bands have been identified with the frequency range designations FR1 (410 MHz–7.125 GHz) and FR2 (24.25 GHz–52.6 GHz). The frequencies between FR1 and FR2 are often referred to as mid-band frequencies. Although a portion of FR1 is greater than 6 GHz, FR1 is often (interchangeably) referred to as the “sub-6 GHz” band in various documents and articles. A similar naming issue sometimes arises regarding FR2, which is often (interchangeably) referred to as the “millimeter wave” band in documents and articles, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz), which is identified as the “millimeter wave” band by the International Telecommunication Union (ITU).

[0039] In view of the above, unless otherwise specified, it should be understood that if the term "sub-6 GHz" is used herein, it can be broadly referred to as a frequency that can be less than 6 GHz, can be within FR1, or can include mid-band frequencies. In addition, unless otherwise specified, it should be understood that if the term "millimeter wave" is used herein, it can be broadly referred to as a frequency that can include mid-band frequencies, can be within FR2, or can be within the EHF band.

[0040] NR supports beamforming and can dynamically configure beam directions. Multiple-input multiple-output (MIMO) transmission with precoding can also be supported. MIMO configurations in the downlink (DL) can support up to 8 transmit antennas, with multi-layer DL transmission of up to 8 streams and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Multiple cell aggregation with up to 8 serving cells can be supported.

[0041] Example Wireless Communication System

[0042] Figure 1 An example wireless communication network 100 is shown in which aspects of the present disclosure may be performed. For example, the wireless communication network 100 may include one or more base stations (BSs) 110 and / or one or more user equipments (UEs) 120 configured to perform techniques for scheduling and bandwidth part (BWP) adaptation for extended reality (XR). Figure 1 As shown, UE 120a includes an XR adaptation manager 122, which may be configured to perform Figure 9 900. BS 110a includes an XR adaptation manager 112, which may be configured to perform Figure 10 Operation 1000.

[0043] The wireless communication network 100 may be a New Radio (NR) system (e.g., a fifth generation (5G) NR network). Figure 1 As shown, the wireless communication network 100 may communicate with a core network (CN) 132. The CN 132 may communicate with one or more BSs 110a-z (each also individually referred to herein as a BS 110 or collectively referred to herein as BS 110) and / or UEs 120a-y (each also individually referred to herein as a UE 120 or collectively referred to herein as UE 120) in the wireless communication network 100 via one or more interfaces.

[0044] BS 110 may provide communication coverage for a particular geographic area (sometimes referred to as a "cell"), which may be fixed or may be mobile depending on the location of mobile BS 110. In some examples, multiple BSs 110 may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces (e.g., direct physical connections, wireless connections, virtual networks, etc.) using any suitable transport network. Figure 1 In the example shown, BSs 110a, 110b, and 110c may be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x may be a pico BS for pico cell 102x. BSs 110y and 110z may be femto BSs for femto cells 102y and 102z, respectively. BS 110 may support one or more cells.

[0045] BS 110 communicates with UEs 120 in wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be dispersed throughout wireless communication network 100, and each UE 120 may be stationary or mobile. Wireless communication network 100 may also include relay stations (e.g., relay station 110r) (also referred to as relays, etc.) that receive transmissions of data and / or other information from upstream stations (e.g., BS 110a or UE 120r) and transmit transmissions of data and / or other information to downstream stations (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between wireless devices.

[0046] The network controller 130 may communicate with a set of BSs 110 and provide coordination and control (e.g., via a backhaul) for these BSs 110. In various aspects, the network controller 130 may communicate with a CN 132 (e.g., a 5G core network (5GC)), which provides various network functions such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network exposure functions, network repository functions, network slice selection functions, etc.

[0047] The radio access network (RAN) may include a network controller 160 and a BS 110. The RAN may communicate with a CN 132 and an application server (AS). According to certain aspects, the BS 110 and the UE 120 may be configured for one or more services involving traffic flows associated with one or more applications running on the UE 120 between an application provider (e.g., an AS) and / or the BS 110 and the UE 120. For example, the UE 120a may be requesting admission to one or more traffic flows for application-related services (e.g., requesting that the BS 110a act as a link between the UE 120a and the AS).

[0048] The wireless communication network 100 may also include a relay station. A relay station is a station that receives transmissions of data and / or other information from an upstream station (e.g., BS 110 or UE 120) and sends transmissions of data and / or other information to a downstream station (e.g., UE 120 or BS 110). A relay station may also be a UE 120 that relays transmissions for other UEs 120. Figure 1 In the example shown in , a relay station 110r may communicate with a BS 110a and a UE 120r to facilitate communication between the BS 110a and the UE 120r. A relay station may also be referred to as a relay BS, a relay, or the like.

[0049] The wireless communication network 100 may be a heterogeneous network including different types of BSs 110 (e.g., macro BSs, pico BSs, femto BSs, relays, etc.). These different types of BSs 110 may have different transmit power levels, different coverage areas, and different impacts on interference in the wireless communication network 100. For example, a macro BS may have a high transmit power level (e.g., 20 watts), while a pico BS, a femto BS, and a relay may have a lower transmit power level (e.g., 1 watt).

[0050] The wireless communication network 100 may support synchronous operation or asynchronous operation. For synchronous operation, the BSs 110 may have similar frame timing, and transmissions from different BSs 110 may be approximately aligned in time. For asynchronous operation, the BSs 110 may have different frame timing, and transmissions from different BSs 110 may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0051] exist Figure 1 , a solid line with double arrows indicates desired transmissions between a UE 120 and a serving BS 110, which is a BS 110 designated to serve the UE 120 on the downlink (DL) and / or uplink (UL). A thin dashed line with double arrows indicates potentially interfering transmissions between the UE 120 and the BS 110.

[0052] Figure 2 BS 110a and UE 120a are shown (e.g., Figure 1 Example components of the wireless communication network 100).

[0053] At BS 110a, transmit processor 220 may receive data from data source 212 and control information from controller / processor 240. Control information may be used for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ (automatic repeat request) indicator channel (PHICH), a physical downlink control channel (PDCCH), a group common PDCCH (GC PDCCH), etc. Data may be used for a physical downlink shared channel (PDSCH), etc. A medium access control-control element (MAC-CE) is a MAC layer communication structure that may be used for the exchange of control commands between wireless nodes. A MAC-CE may be carried in a shared channel, such as a PDSCH, a physical uplink shared channel (PUSCH), or a physical sidelink shared channel (PSSCH).

[0054] The transmit processor 220 may process (e.g., encode and symbol map) data and control information, respectively, to obtain data symbols and control symbols. The processor 220 may also generate reference signals, such as for a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a channel state information reference symbol (CSI-RS). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols (if applicable), and may provide an output symbol stream to a modulator (MOD) in a transceiver 232a-232t. Each MOD in the transceiver 232a-232t may process a corresponding output symbol stream (e.g., for orthogonal frequency division multiplexing (OFDM) or the like) to obtain an output sample stream. Each MOD in the transceiver 232a-232t may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a DL signal. DL signals from the MODs in transceivers 232a-232t may be transmitted via antennas 234a-234t, respectively.

[0055] At UE 120a, antennas 252a-252r can receive DL signals from BS 110 and can provide received signals to demodulators (DEMODs) in transceivers 254a-254r, respectively. Each DEMOD in transceiver 254 can condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each DEMOD in transceiver 254 can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 can obtain received symbols from all DEMODs in transceivers 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 258 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 260, and provide decoded control information to a controller / processor 280.

[0056] On the UL, at UE 120a, a transmit processor 264 may receive and process data from a data source 262 (e.g., for the PUSCH) and control information from a controller / processor 280 (e.g., for the physical uplink control channel (PUCCH)). The transmit processor 264 may also generate reference symbols for reference signals (e.g., for the sounding reference signal (SRS)). The symbols from the transmit processor 264 may be precoded by a transmit MIMO processor 266 (if applicable), further processed by a MIMO detector (e.g., for SC-FDM, etc.) in transceivers 254a-254r, and transmitted to BS 110a. At BS 110a, the UL signal from UE 120a may be received by antenna 234, processed by a DEMOD in transceiver 232, detected by a MIMO detector 236 (if applicable), and further processed by a receive processor 238 to obtain decoded data and control information transmitted by UE 120a. The receive processor 238 may provide decoded data to a data sink 239 and decoded control information to a controller / processor 240 .

[0057] Memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.A scheduler 244 may schedule UE 120a for data transmission on the DL and / or UL.

[0058] The antennas 252, processors 266, 258, 264, and / or controller / processor 280 of the UE 120a and / or the antennas 234, processors 220, 230, 238, and / or controller / processor 240 of the BS 110a may be used to perform the various techniques and methods described herein. Figure 2 As shown, the controller / processor 240 of BS 110a has an XR adaptation manager 241, which may be configured to execute Figure 10 The operations shown in and other operations disclosed herein. Figure 2 As shown, the controller / processor 280 of the UE 120a has an XR adaptation manager 281, which may be configured to execute Figure 9 Although illustrated at the controller / processor level, other components of the UE 120a and BS 110a may be used to perform the operations described herein.

[0059] NR can utilize OFDM with a cyclic prefix (CP) on both the UL and DL. NR can support half-duplex operation using time division duplex (TDD). OFDM and single-carrier frequency division multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are often also referred to as tones, bins, etc. Each subcarrier can be modulated with data. Modulation symbols can be sent in the frequency domain with OFDM and in the time domain with SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation, called a resource block (RB), can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15 kHz, and other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.) can be defined relative to the basic SCS.

[0060] Figure 3 3 is a diagram illustrating an example of a frame format 300 for NR. The transmission timeline for each of DL and UL can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10 ms) and can be divided into 10 subframes with indices 0 to 9, each subframe being 1 ms. Each subframe can include a variable number of slots (e.g., 1, 2, 4, 8, 16... slots), depending on the SCS. Each slot can include a variable number of symbol periods (e.g., 7, 12, or 14 symbols), depending on the SCS. An index can be assigned to the symbol periods in each slot. The subslot structure can refer to a transmission time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols). Each symbol in a slot can be configured for a link direction (e.g., DL, UL, or flexible) for data transmission, and the link direction of each subframe can be dynamically switched. The link direction can be based on the slot format. Each slot can include DL / UL data and DL / UL control information.

[0061] In NR, synchronization signal blocks (SSBs) are transmitted. In certain aspects, SSBs may be transmitted in bursts, where each SSB in the burst corresponds to a different beam direction for UE-side beam management (e.g., including beam selection and / or beam refinement). SSBs include PSS, SSS, and two-symbol PBCH. They may be transmitted at fixed slot locations (such as Figure 3The SSB is sent in symbols 0-3 shown in the figure. PSS and SSS can be used by UE for cell search and acquisition. PSS can provide half-frame timing, and synchronization signal (SS) can provide CP length and frame timing. PSS and SSS can provide cell identity. PBCH carries certain basic system information, such as downlink system bandwidth, timing information within the radio frame, SS burst set periodicity, system frame number, etc. SSB can be organized into SS bursts to support beam scanning. Additional system information, such as remaining minimum system information (RMSI), system information block (SIB), other system information (OSI), can be sent on PDSCH in certain subframes. For millimeter waves, SSB can be sent up to sixty-four times, for example, using up to sixty-four different beam directions. Multiple transmissions of SSB are called SS burst sets. SSBs in an SS burst set can be sent in the same frequency region, while SSBs in different SS burst sets can be sent at different frequency regions.

[0062] Figure 4 is a diagram illustrating a CN 400 (e.g., such as Figure 1 4 and 5. The CN 132 in FIG. 4 is a block diagram of an example architecture in which the CN 132 in FIG. 4 communicates with the RAN 424 and the AS 402. Figure 4 As shown, the example architecture includes a CN 400, a RAN 424, a UE 422, and a data network (DN) 428 (eg, operator services, Internet access, or third-party services).

[0063] The CN 400 may host core network functions. The CN 400 may be deployed centrally. The CN 400 functions may be offloaded (e.g., to Advanced Wireless Services (AWS)) to attempt to handle peak capacity. Figure 4 As shown, CN 400 can be implemented by one or more network entities that perform network functions (NFs), including: network slice selection function (NSSF) 404, network exposure function (NEF) 406, NF repository function (NRF) 408, policy control function (PCF) 410, unified data management (UDM) 412, application function (AF) 414, authentication server function (AUSF) 416, access and mobility management function (AMF) 418, session management function (SMF) 420; user plane function (UPF) 426, and various other functions (not shown) (such as unstructured data storage function (UDSF)); unified data repository (UDR); 5G-equipment identity register (5G-EIR); and / or security edge protection proxy (SEPP).

[0064] The AMF 418 may include the following functions (some or all of which may be supported in one or more instances of the AMF 418): termination of the RAN control plane (CP) interface (N2); termination of the non-access stratum (NAS) (e.g., N1), NAS ciphering and integrity protection; registration management; connection management; reachability management; mobility management; lawful interception (for AMF events and interfaces with L1 systems); transport of session management (SM) messages between the UE 422 and the SMF 420; a transparent proxy for routing SM messages; access authentication; access authorization; transport of short message service (SMS) messages between the UE 422 and the SMS function (SMSF); a security anchor function (SEAF); a security context management (SCM), which receives keys from the SEAF that it uses to derive access network specific keys; location service management for regulated services; and communication between the UE 422 and the location management function (LMF) and in the RAN. Transmission of location service messages between 424 and LMF; allocation of Evolved Packet Service (EPS) bearer ID for interworking with EPS; and / or UE mobility event notification; and / or other functions.

[0065] The SMF 420 can support session management (e.g., session establishment, modification, and release), UE IP address allocation and management, Dynamic Host Configuration Protocol (DHCP) functions, termination of NAS signaling related to session management, downlink data notification, and service steering configuration for the UPF for correct service routing. The UPF 426 can support packet routing and forwarding, packet inspection, Quality of Service (QoS) processing, external Protocol Data Unit (PDU) session points interconnected with the DN 228, and anchor points for intra-RAT and inter-RAT mobility. The PCF 410 can support a unified policy framework that provides policy rules to control protocol functions and / or access subscription information for policy decisions in the UDR. The AUSF 416 can act as an authentication server. The UDM 412 can support the generation of authentication and key agreement (AKA) credentials, user identity processing, access authorization, and subscription management. The NRF 408 can support service discovery functions and maintain NF profiles and available NF instances. The NSSF may support: selecting a network slice instance to serve the UE 422, determining allowed network slice selection assistance information (NSSAI), and / or determining a set of AMFs to be used to serve the UE 422.

[0066] NEF 406 can support: disclosure of capabilities and events, secure provision of information from external applications to the 3GPP network, and conversion of internal / external information. AF 414 can support: application impact on service routing, access to NEF 406 and / or interaction with the policy framework for policy control.

[0067] like Figure 4 As shown, CN 400 can communicate with AS 402, UE 422, RAN 424, and DN 428. In some examples, CN 200 communicates with AS 402 via NEF 406 and / or AF 414.

[0068] Example Services and QoS Parameters

[0069] A communication system, such as a wireless communication network (e.g., wireless communication network 100 or RAN 424), can provide communication services to user equipment (UE) (e.g., UE 120 or UE 422). For example, 5th generation (5G) New Radio (NR) can support services such as enhanced mobile broadband (eMBB) services targeting wide bandwidth (e.g., 80 MHz or above), ultra-reliable low latency communication (URLLC) services, and other services including extended reality (XR) services discussed in more detail below. Services can include latency and reliability requirements. Services can have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements.

[0070] The traffic requirements for a service can be summarized via a set of parameters (e.g., QoS parameters) and associated with the traffic flows supporting the service. Parameters may include a packet error rate (PER), a packet delay budget (PDB), and / or a guaranteed bit rate (GBR). The PER may be the ratio (in percentage) of successfully received packets. For example, the PER may define an upper limit on the rate of protocol data units (PDUs) (e.g., IP packets) that have been processed by the sender of a link layer protocol (e.g., Radio Link Control (RLC) in a radio access network (RAN) accessed by the Third Generation Partnership Project (3GPP)) but not successfully delivered to an upper layer (e.g., Packet Data Convergence Protocol (PDCP) in a RAN accessed by 3GPP) by the corresponding receiver. Thus, the PER may define an upper limit on the packet loss rate associated with non-congestion. The PDB may be defined as an upper limit on the time that packets can be delayed between a UE (e.g., UE 422) and a UPF (e.g., UPF 426) on the core network (CN) side. The GBR may indicate the bandwidth (bit rate) that the network guarantees.

[0071] The resource type may determine whether dedicated network resources associated with a QoS flow-level guaranteed flow bit rate (GFBR) value are permanently allocated (e.g., by an admission control function in a radio base station (BS)), whereas non-GBR QoS flows may be pre-authorized via static policy and charging control. GBR QoS flows may use either a GBR resource type or a delay critical GBR resource type. For traffic flows of type "delay critical GBR" (e.g., for URLLC traffic flows), a parameter called Maximum Data Burst Volume (MDBV) is specified to describe the traffic burst. The MDBV represents the maximum amount of data that the 5G-AN is required to serve within a period of time in the 5G-AN PDB (e.g., the 5G-AN part of the PDB). The MDBV may be a parameter associated with a standardized indicator value (e.g., 5QI to RAN (e.g., Figure 4 RAN 424) and, if received, should be used instead of the default value.

[0072] Figure 5 Table 500 in Figure 5 shows example QoS parameters that can be configured for various services. In some examples, conversational voice services, conversational video services (e.g., real-time streaming), and video services (e.g., buffered streaming), and / or TCP-based services (e.g., the World Wide Web, email, chat, FTP, peer-to-peer file sharing, progressive video, etc.) can be associated with eMBB services. In some examples, remote control services (e.g., UEs remotely operated by a person or computer, such as remote pilots or vehicle-to-everything (V2X) applications operating remote vehicles without a driver, or remote vehicles located in hazardous environments) can be associated with URLCC. In some examples, low-latency eMBB applications can be associated with XR services. XR services can refer to services such as augmented reality (AR), virtual reality (VR), and cloud gaming. AR and VR services can be characterized by human interaction with an environment or a person, or controlling a UE, and relying on audio-visual feedback. In use cases such as VR and interactive conversation, latency requirements include latency at the application layer (e.g., codec), which can be specified outside of 3GPP.

[0073] exist Figure 5 The QoS parameters and services shown in table 500 are illustrative only, and various other QoS parameters and services may be specified.

[0074] At high PDB values ​​(e.g., equal to or exceeding 100ms), traffic bursts within the PDB range can be approximated by GBR*PDB. For some traffic flows measured at each PDB, the percentage of time that a burst exceeds GBR*PDB is small relative to the PER. Dropping packets in such a burst will have a negligible impact on the PER of the traffic. Therefore, for such traffic flows, the size of the transmitted traffic burst may not be important. However, for traffic flows at low PDB and low PER values, the amount of traffic handled by the 5G system may be much higher than GBR*PDB. In this case, describing the traffic burst is useful.

[0075] As mentioned above, MDBV is specified for traffic flows of type "delay-critical GBR", which are expected to handle low-throughput traffic. Therefore, in some cases, the value range used for MDBV is capped at 4095 bytes (e.g., when signaled on a 5G network interface). Even in the case of a PDB of 1ms, the throughput cap of 4095 bytes means that the maximum throughput on the flow cannot exceed 4095 bytes / ms (i.e., approximately 32.76Mbps). On traffic flows with larger PDB values, the supported throughput may be even lower. However, for certain services, such as XR services (e.g., AR, VR, cloud gaming), the throughput requirements (e.g., up to 250Mbps) and the PDB requirements (e.g., 25ms) may be higher.

[0076] Example Extended Reality

[0077] New Radio (NR) is an emerging wireless communication technology under development in conjunction with the 5G Technology Forum (5GTF). NR access (e.g., 5G NR) can support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or above), millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or above), massive machine type communication (mMTC) targeting non-backwards compatible machine type communication (MTC) technology, and / or mission-critical ultra-reliable low latency communication (URLLC). Wireless communication services may include latency (e.g., file delay budget (FDB) and / or packet delay budget (PDB)) and reliability requirements (e.g., file error rate (FER) and / or packet error rate (PER)), and may also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. Extended Reality (XR) is a wireless communication service for services that require low latency (eg, PDB between 5 ms and 25 ms) and high bit rate (eg, PER less than or equal to 1e-3).

[0078] Figure 6Table 600 illustrating various use cases for XR is shown. For example, virtual reality (VR) can be used for cloud gaming, VR split rendering, and augmented reality (AR) split compute. Cloud gaming generally refers to gaming on a user device where at least some of the graphics processor unit (GPU) processing is performed on a cloud server that can implement a more powerful GPU. Similarly, GPU processing for VR and AR can be split between a GPU on the cloud and a GPU on the user device. However, cloud gaming, split rendering, and split compute services require low latency to maintain an acceptable gaming experience. As shown, cloud gaming can be implemented using QoS or over the top (OTT) on a 5G network. In addition, different use cases may have different location and mobility requirements.

[0079] According to aspects of the present disclosure, the power consumption of AR devices may be a challenge to their usefulness. To be a useful enhancement to smartphones, it is desirable that AR devices (e.g., such as those in Figure 7 The battery life of AR glasses, such as the AR glasses 726 shown in FIG, matches expectations for smartphone battery life (i.e., a full day of use between charges). However, a design constraint for AR glasses is that battery capacity is severely limited because the proximity of the AR glasses to the user's forehead makes it desirable to prevent high temperatures (i.e., of the battery).

[0080] In aspects of the present disclosure, AR glasses physically tethered to a smartphone may be a successful design given the technical constraints. For the described form factor, power requirements may still be challenging, in part due to a potential 2-watt power budget for AR glasses, including power for a system-on-chip (SoC) (e.g., a graphics processing unit (GPU), a central processing unit (CPU), and / or memory), a display, a camera, and / or sensors.

[0081] Figure 7 A wireless communication system 700 (e.g., a 5G system) for XR is shown. As shown, the wireless communication system 700 may include a UE 720 (e.g., Figure 1 UE 120), including BS 710 (e.g. Figure 1 BS 110) of the radio access network (RAN) 702 (e.g., Figure 1720) and the Internet 712. In some aspects, the UE 720 can be associated with or tethered to the AR glasses 726 via, for example, a universal serial bus (USB) interface 722 for VR or AR applications. As shown, the 5G system 700 can communicate with an edge cloud server 750, which can include logical entities such as an XR edge data network (DN) 728 and an XR edge application function 724. The edge cloud server 750 refers to a cloud server that is located closer to the UE 720 to allow data for various applications as described herein to be transmitted with lower latency. For example, the CN to XR edge server latency can be negligible compared to the 5G system 700 latency. The edge cloud server 750 can be associated with the XR public cloud AF 730.

[0082] According to aspects of the present disclosure, XR downlink (DL) traffic can be H.264 and / or H.265 encoded video. The video can be quasi-periodic, with a burst for each frame, and thus the burst rate in bursts per second is equal to the frame rate of the video in frames per second (fps). Alternatively, the video can be quasi-periodic, with two possibly interleaved "eye buffers" per frame, and thus the burst rate in bursts per second is equal to 2 times the frame rate in fps.

[0083] In some aspects of the present disclosure, a frame may be split into multiple files, where each file may be processed separately.

[0084] According to aspects of the present disclosure, each frame file can be intra-coded (i.e., I-frame), predicted (i.e., P-frame), or bi-directionally predicted (i.e., B-frame). An I-frame can include a complete video frame or image, such as a JPG or BMP image file. In contrast, a P-frame can include only the changes in the image from the previous frame. For example, only the portion of the image that has changed since the previous frame is encoded, and the encoder does not store the unchanged pixels in the frame (e.g., the background), thereby saving space. Therefore, I-frames are larger than P-frames (e.g., in terms of the number of bits). B-frames save even more space by using the difference between the current frame and both the previous and following frames to specify its content. Therefore, B-frames can be smaller than I-frames and P-frames.

[0085] In aspects of the present disclosure, uplink (UL) transmissions for cloud gaming applications include controller information, while for VR split rendering, UL transmissions may include controller information and user gesture information.

[0086] According to aspects of the present disclosure, UL transmissions may be more periodic than DL transmissions to convey the latest information from the controller to the server.

[0087] In aspects of the present disclosure, the AR split compute architecture may include a second stream for AR UL transmission on the edge and / or cloud for computer vision (e.g., to determine user pose information).

[0088] Figure 8 A transmission timeline 800 is shown in accordance with certain aspects of the present disclosure. The transmission timeline 800 illustrates XR DL traffic. As described above, XR DL traffic can exhibit a quasi-periodic pattern because the underlying data frames are generated quasi-periodically. The frame rate is typically 120 or 60 Hz, which corresponds to an inter-frame spacing of 8.3 ms and 16.7 ms (as shown at 850). The transmission timeline 800 illustrates how the bursts can vary in size, with a burst for I-frames at 805 and a burst for P-frames at 810.

[0089] Connected discontinuous reception (C-DRX) can be configured for power-efficient communication. In C-DRX operation, the UE periodically wakes up (e.g., powers on the receiver) to receive data. In order to configure C-DRX for power-efficient communication of XR frames, it is desirable that the periodicity of C-DRX matches the interframe spacing of the XR application. In the described C-DRX operation, once the frame data is received, the UE goes to sleep (e.g., powers off the receiver or part of the receiver). Each frame can consist of several slices that can be sent in multiple time slots. These slices together constitute a data burst.

[0090] In aspects of the present disclosure, the latency requirements for XR operations (e.g., a 10 ms latency budget as shown at 825) are more stringent than file transfer protocol (FTP) download or web browsing latency budgets.

[0091] According to aspects of the present disclosure, if C-DRX is configured on the UE, data for a frame should be successfully received within one DRX cycle.

[0092] In Rel-15, the K0 value (i.e., the control channel-to-data channel delay for the physical downlink shared channel (PDSCH)), which may be indicated in the scheduling downlink control information (DCI), may be configured via radio resource control (RRC) in the time domain resource allocation (TDRA) table, and the specific K0 value may be indicated in the scheduling DCI. The gNB may ensure that all configured K0 values ​​are non-zero. The UE may then find the minimum of all K0 values ​​and check whether the minimum K0 is non-zero. If so, the UE may perform extended micro-sleep. In Rel-16, an explicit threshold for the minimum K0 may be configured. The above discussion also applies to K2 (i.e., the control channel-to-data channel delay for the physical uplink shared channel (PUSCH)) in a similar manner. That is, in Rel-15, the K2 value (i.e., the control channel-to-data channel delay for the PUSCH), which may be indicated in the scheduling DCI, may be configured via RRC in the TDRA table. The gNB may ensure that all configured K2 values ​​are greater than a certain minimum non-zero value. The UE may then find the minimum of all K2 values ​​and check that it is greater than some minimum non-zero value to facilitate power saving.In Rel-16, an explicit threshold for the minimum K2 may be configured.

[0093] According to various aspects of the present disclosure, it is desirable to save as much UE power as possible while minimizing the impact on communication latency. It is also desirable to consider different communication environments, such as single or multiple XR UEs in a cell. Existing C-DRX designs (e.g., used in Rel-15) do not consider the specific characteristics and requirements of XR services. The UE behavior is fixed throughout the active duration of the DRX cycle.

[0094] In aspects of the present disclosure, with a minimum control channel to data channel delay of 1 slot, the UE can still perform physical downlink control channel (PDCCH) monitoring in each slot during the period between traffic bursts. Therefore, it is desirable to develop more improvements for XR operation.

[0095] Example scheduling offset and bandwidth fraction adaptation for extended reality

[0096] According to various aspects of the present disclosure, one or more techniques for improving downlink (DL) wireless data transmission for extended reality (XR) applications can be implemented to improve the power efficiency of DL wireless data transmission and XR applications. Among the various aspects of the present disclosure, user equipment (UE) power saving and latency joint optimization techniques are provided, which result in reduced power consumption and latency suitable for XR applications.

[0097] According to aspects of the present disclosure, K0 may be adapted (eg, dynamically changed) to support XR communication.

[0098] In aspects of the present disclosure, the bandwidth of the bandwidth part (BWP) may be adapted to support XR communications.

[0099] According to various aspects of the present disclosure, relevant configuration parameter values ​​(e.g., K0 or bandwidth) may be configured or indicated by a network entity (e.g., a base station (BS)) based on radio resource control (RRC) signaling, medium access control-control element (MAC-CE), or in downlink control information (DCI).

[0100] In various aspects of the present disclosure, relevant configuration parameter values ​​may be autonomously adjusted by the UE according to the stage of the communication process.

[0101] In certain aspects, K0 is the time slot offset between the scheduling DCI and the corresponding scheduled physical downlink shared channel (PDSCH). In various aspects of the present disclosure, K0 adaptation can be achieved by switching between same-slot scheduling, where the scheduling DCI and the scheduled PDSCH are in the same time slot (i.e., K0=0), and cross-slot scheduling, where the scheduling DCI and the scheduled PDSCH are in different time slots (i.e., K0>0). Same-slot scheduling results in lower latency and relatively higher power consumption, while cross-slot scheduling results in lower power consumption and relatively higher latency.

[0102] According to various aspects of the present disclosure, a BWP is a small capsule of many configurations. Among these configurations is the bandwidth used for transmitting and receiving signals. Compared to a smaller BWP bandwidth, which results in lower power consumption and relatively higher latency, a larger BWP bandwidth results in lower latency and relatively higher power consumption.

[0103] In various aspects of the present disclosure, for transmissions of the same information data within a hybrid automatic repeat request (HARQ) process, K0 is set to greater than 0 (i.e., cross-slot scheduling) for the first M transmissions of the same information data within the HARQ process (e.g., M=1 if there is only the first or new transmission), and K0 is set to 0 for subsequent retransmissions.

[0104] According to aspects of the present disclosure, setting K0 to greater than 0 allows the UE to enter sleep (e.g., micro-sleep) after receiving a physical downlink control channel (PDCCH) without storing samples for potential PDSCH allocations (i.e., potential PDSCH allocations in the received PDCCH) before the scheduling PDCCH is decoded. As a result, when K0>0, the UE can save power by turning off the UE's receiver after receiving the PDCCH.

[0105] In various aspects of the present disclosure, when the latency requirement for the first M transmissions of the same information data within a HARQ process is not critical, the UE can use cross-slot scheduling to save power. If the UE cannot successfully decode the first M transmissions, the network entity switches the scheduling to same-slot scheduling to avoid additional delays in the UE receiving the transmission.

[0106] Figure 9 900 is a flow diagram illustrating example operations 900 for wireless communication in accordance with certain aspects of the present disclosure. Operations 900 may be performed, for example, by a UE (e.g., Figure 1 Operation 900 may be performed by a UE 120a in the wireless communication network 100. Operation 900 may be implemented as a processor in one or more processors (e.g., Figure 2 In addition, in operation 900, the UE may transmit and receive signals, for example, through one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the UE may be implemented via a bus interface that obtains and / or outputs signals by one or more processors (e.g., the controller / processor 280).

[0107] Operations 900 may begin, at 905, with obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for receiving a first transmission on a BWP.

[0108] At 910, the UE changes at least one of the following: the minimum control channel to data channel delay to a new minimum control channel to data channel delay, or the bandwidth on the BWP to a new bandwidth.

[0109] At 915, the UE receives a first transmission on the BWP using at least one of a new minimum control channel to data channel delay or a new bandwidth of the BWP.

[0110] In certain aspects, a UE receives a first configuration of a first BWP and a second configuration of a second BWP. The first BWP is configured for a lower traffic rate, and the second BWP is configured for a higher traffic rate. The UE obtains an indication to switch from the first BWP to the second BWP. In response to obtaining the indication, the UE switches from the first BWP to the second BWP.

[0111] According to aspects of the present disclosure, the UE changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay may include changing from a first number of time slots to a second number of time slots that is less than the first number.

[0112] In aspects of the present disclosure, the UE changing the bandwidth of the BWP to a new bandwidth may include changing from a first bandwidth to a second bandwidth greater than the first bandwidth.

[0113] According to aspects of the present disclosure, the UE obtaining the indication may include receiving a new minimum control channel to data channel delay or a new bandwidth on the BWP in at least one of an RRC signal, a MAC-CE, or a DCI.

[0114] In various aspects of the present disclosure, the UE obtaining the indication may include the UE determining to change the minimum control channel to data channel delay or to change the bandwidth of the BWP.

[0115] According to aspects of the present disclosure, the UE obtaining the indication may include the UE sending a negative acknowledgement (NACK) in response to receiving the retransmission. In some such aspects, obtaining the indication may include receiving a threshold number of retransmissions.

[0116] In various aspects of the present disclosure, the UE obtaining the indication may include the UE receiving a threshold number of second transmissions. In such aspects of the present disclosure, the UE receiving the threshold number of second transmissions may include the UE receiving the threshold number of second transmissions during an active portion of a connected mode discontinuous reception (C-DRX) configuration.

[0117] Figure 10 is a flow diagram illustrating example operations 1000 for wireless communications in accordance with certain aspects of the present disclosure. Operations 1000 may be performed, for example, by a network entity (e.g., Figure 1 The operations 1000 may be performed by a BS 110a in the wireless communication network 100. The operations 1000 may be complementary to the operations 900 performed by the UE. The operations 1000 may be implemented as a process in one or more processors (e.g., Figure 2 In addition, in operation 1000, the BS may transmit and receive signals, for example, through one or more antennas (e.g., Figure 2 In some aspects, the transmission and / or reception of signals by the BS may be implemented via a bus interface of one or more processors (eg, controller / processor 240) that obtains and / or outputs signals.

[0118] Operations 1000 may begin, at 1005, by obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for sending a first transmission to a UE on a BWP.

[0119] At 1010, the network entity changes at least one of the following for a first transmission to the UE: a minimum control channel to data channel delay to a new minimum control channel to data channel delay, or a bandwidth on a BWP to a new bandwidth.

[0120] At 1015, the network entity sends a first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0121] According to aspects of the present disclosure, the network entity changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay may include the network entity changing from a first number of time slots to a second number of time slots less than the first number.

[0122] In aspects of the present disclosure, the network entity changing the bandwidth of the BWP to a new bandwidth may include the network entity changing from a first bandwidth to a second bandwidth that is greater than the first bandwidth.

[0123] According to aspects of the present disclosure, the network entity obtaining the indication may include the network entity receiving a new minimum control channel to data channel delay or a new bandwidth on the BWP in at least one of an RRC signal, a MAC-CE, or a DCI.

[0124] In aspects of the present disclosure, the network entity obtaining the indication may include the network entity determining to change a minimum control channel to data channel delay or to change a bandwidth of a BWP.

[0125] According to aspects of the present disclosure, the network entity obtaining the indication may include the network entity receiving a negative acknowledgement (NACK) in response to sending the retransmission. In some such aspects, the network entity obtaining the indication may include the network entity sending a threshold number of retransmissions.

[0126] In various aspects of the present disclosure, the network entity obtaining the indication may include the network entity sending a threshold number of second transmissions. In some such aspects, the network entity sending the threshold number of second transmissions may include the network entity sending the threshold number of second transmissions during an active portion of the UE's CDRX configuration.

[0127] Figure 11A transmission timeline 1100 illustrating a UE performing a micro-sleep according to certain aspects of the present disclosure is shown. In the transmission timeline 1100, cross-slot scheduling is used at 1112. Thus, during slots 1110 and 1120, the UE starts a micro-sleep at 1114 after receiving the PDCCH. The PDCCH conveys a grant for the first transmission (first Tx) of the PDSCH 164 to be received by the UE. The UE fails to decode the PDSCH 1164 and sends a NACK 1152 to the network entity. In response to the NACK 1152, at 1130, K0 is changed to 0 (i.e., same slot scheduling) for retransmission (ReTx). As described above, K0 may be changed to 0 in response to a configuration sent by the network entity, or the UE may autonomously change K0 to 0. In this example, M=1. In time slot 1122, the network entity sends PDCCH 1174, which conveys a grant for PDSCH 1184 in the same time slot (i.e., K0=0). The UE successfully decodes PDSCH 1184 and sends an acknowledgement (ACK) 1154. In response to ACK 1154, K0 is changed back to 1 at 1160. At 1132, the network entity sends PDCCH 1190, which conveys a grant for another first transmission of PDSCH 1192 occurring one time slot after PDCCH 1190, and the UE enters a micro-sleep during time slot 1132.

[0128] In certain aspects, for each data burst, the UE assumes K0>0 until the first N PDSCHs (e.g., N=1) are received, i.e., the first N PDSCHs are based on cross-slot scheduling. The UE then uses (i.e., assumes) K0=0 (i.e., same-slot scheduling) for the remaining PDSCHs of the data burst.

[0129] In certain aspects, if the UE is configured with CDRX, each data burst may be distributed during the wake-up portion (ie, CDRX active duration) by matching the CDRX cycle and inactivity timer with a burst pattern including an inter-burst interval and a burst duration.

[0130] In certain aspects, if C-DRX is not configured on the UE, the UE should go to sleep (eg, using deep sleep, light sleep, micro sleep, or a combination) and wake up according to a burst pattern.

[0131] In certain aspects, for transmissions of the same information data within a HARQ process, the bandwidth of the BWP transmitting the transmission may be set to a first value, B1, for the first L (e.g., L=1) transmissions. Then, if the UE fails to decode all of the first L transmissions, the bandwidth may be set to a second value, B2 (e.g., B2>B1), for subsequent retransmissions of the same information data within the HARQ process.

[0132] In certain aspects, for each data burst, the bandwidth of the BWP transmitting the data burst may be set to a first value B1 until the UE receives the first K (e.g., K=1) PDSCHs. The bandwidth may then be set to a second value B2 (e.g., B2>B1) for the remaining PDSCHs of the data burst.

[0133] In certain aspects, the network entity and the UE may elect to employ one or more KO adaptation and BWP bandwidth adaptation techniques and independently set the relevant parameters (eg, the network entity and the UE set the parameters without communicating changes to each other).

[0134] Figure 12 A communication device 1200 is shown, which may include components configured to perform operations for the techniques disclosed herein (such as in Figure 9 1200). The communication device 1200 includes a processing system 1202 coupled to a transceiver 1208 (e.g., a transmitter and / or a receiver). The transceiver 1208 is configured to transmit and receive signals for the communication device 1200, such as the various signals described herein, via an antenna 1210. The processing system 1202 may be configured to perform processing functions for the communication device 1200, including processing signals received and / or to be transmitted by the communication device 1200.

[0135] The processing system 1202 includes a processor 1204 coupled to a computer-readable medium / memory 1212 via a bus 1206. In certain aspects, the computer-readable medium / memory 1212 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1204, cause the processor 1204 to perform operations in the computer-readable medium / memory. Figure 9 12 or other operations for performing the various techniques discussed herein. In certain aspects, the computer-readable medium / memory 1212 stores: code for obtaining 1214, code for changing 1216, and code for receiving 1218. The code for obtaining 1214 may include code for obtaining an indication to change at least one of the bandwidth or the minimum control channel to data channel delay for receiving the first transmission on the BWP. The code for changing 1216 may include code for changing at least one of the minimum control channel to data channel delay to a new minimum control channel to data channel delay or the bandwidth on the BWP to a new bandwidth. The code for receiving 1218 may include code for receiving the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0136] Processor 1204 may include circuitry configured to implement code stored in computer-readable medium / memory 1212, such as for executing Figure 9 The processor 1204 may include circuitry 1220 for obtaining, circuitry 1222 for changing, and circuitry 1224 for receiving. The circuitry 1220 for obtaining may include circuitry for obtaining an indication to change at least one of a bandwidth or a minimum control channel to data channel delay for receiving the first transmission on the BWP. The circuitry 1222 for changing may include circuitry for changing at least one of the minimum control channel to data channel delay to a new minimum control channel to data channel delay or the bandwidth on the BWP to a new bandwidth. The circuitry 1224 for receiving may include circuitry for receiving the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0137] Figure 13 A communication device 1300 is shown, which may include components configured to perform operations for the techniques disclosed herein (such as in Figure 10 1300). The communication device 1300 includes a processing system 1302 coupled to a transceiver 1308 (e.g., a transmitter and / or a receiver). The transceiver 1308 is configured to transmit and receive signals for the communication device 1300, such as the various signals described herein, via an antenna 1310. The processing system 1302 may be configured to perform processing functions for the communication device 1300, including processing signals received and / or to be transmitted by the communication device 1300.

[0138] The processing system 1302 includes a processor 1304 coupled to a computer-readable medium / memory 1312 via a bus 1306. In certain aspects, the computer-readable medium / memory 1312 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1304, cause the processor 1304 to perform operations in the computer-readable medium / memory. Figure 10The computer-readable medium / memory 1312 may include code for performing the operations shown in FIG. 13 or other operations for performing various techniques discussed herein. In certain aspects, the computer-readable medium / memory 1312 stores code for obtaining 1314, code for changing 1316, and code for receiving 1318. The code for obtaining 1314 may include code for obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for sending a first transmission to a UE on a BWP. The code for changing 1316 may include code for changing at least one of the following for the first transmission to the UE: changing the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay, or changing the bandwidth on the BWP to a new bandwidth. The code for sending 1318 may include code for sending the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0139] Processor 1304 may include circuitry configured to implement code stored in computer-readable medium / memory 1312, such as for executing Figure 10 The operations shown in FIG. 1 and other operations for performing various techniques discussed herein may be performed. For example, processor 1304 may include circuitry for obtaining 1320, circuitry for changing 1322, and circuitry for sending 1324. Circuitry for obtaining 1320 may include circuitry for obtaining an indication to change at least one of a bandwidth or a minimum control channel-to-data channel delay for sending a first transmission to a UE on a BWP. Circuitry for changing 1322 may include circuitry for changing at least one of the following for the first transmission to the UE: changing the minimum control channel-to-data channel delay to a new minimum control channel-to-data channel delay, or changing the bandwidth on the BWP to a new bandwidth. Circuitry for sending 1324 may include circuitry for sending the first transmission on the BWP using at least one of the new minimum control channel-to-data channel delay or the new bandwidth of the BWP.

[0140] Example aspects

[0141] Implementation examples are described in the following numbered aspects.

[0142] In a first aspect, a method for wireless communication by a user equipment (UE) comprises: obtaining an indication for changing at least one of a bandwidth or a minimum control channel to data channel delay for receiving a first transmission on a bandwidth part (BWP); changing the at least one of: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, or changing the bandwidth on the BWP to a new bandwidth; and receiving the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0143] In a second aspect, alone or in combination with the first aspect, changing the at least one item of the minimum control channel to data channel delay to a new minimum control channel to data channel delay comprises changing from a first number of time slots to a second number of time slots less than the first number.

[0144] In a third aspect, alone or in combination with one or more of the first and second aspects, changing the bandwidth of the BWP to the new bandwidth includes changing from a first bandwidth to a second bandwidth greater than the first bandwidth.

[0145] In a fourth aspect, obtaining the indication, alone or in combination with one or more of the first to third aspects, comprises receiving the new minimum control channel to data channel delay or the new bandwidth on the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

[0146] In a fifth aspect, alone or in combination with one or more of the first to fourth aspects, obtaining the indication includes: determining, by the UE, to change the minimum control channel to data channel delay or to change the bandwidth of the BWP.

[0147] In a sixth aspect, alone or in combination with one or more of the first to fifth aspects, obtaining the indication includes sending a negative acknowledgement (NACK) in response to receiving the retransmission.

[0148] In a seventh aspect, alone or in combination with one or more of the first to sixth aspects, obtaining the indication includes: receiving a threshold number of retransmissions.

[0149] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, obtaining the indication includes receiving a threshold number of second transmissions.

[0150] In a ninth aspect, alone or in combination with one or more of the first to eighth aspects, receiving the threshold number of second transmissions comprises receiving the threshold number of second transmissions during an active portion of a connected mode discontinuous reception (CDRX) configuration.

[0151] In a tenth aspect, a method for wireless communication by a network entity comprises: obtaining an indication for changing at least one of a bandwidth or a minimum control channel to data channel delay for sending a first transmission to a user equipment (UE) on a bandwidth part (BWP); changing the at least one of the following for the first transmission to the UE: changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, or changing the bandwidth on the BWP to a new bandwidth; and sending the first transmission on the BWP using at least one of the new minimum control channel to data channel delay or the new bandwidth of the BWP.

[0152] In the eleventh aspect, alone or in combination with the tenth aspect, changing at least one of the minimum control channel to data channel delay to a new minimum control channel to data channel delay includes: changing from a first number of time slots to a second number of time slots less than the first number.

[0153] In a twelfth aspect, alone or in combination with one or more of the tenth and eleventh aspects, changing the bandwidth of the BWP to the new bandwidth comprises changing from a first bandwidth to a second bandwidth greater than the first bandwidth.

[0154] In the thirteenth aspect, obtaining the indication, alone or in combination with one or more of the tenth to twelfth aspects, includes receiving the new minimum control channel to data channel delay or the new bandwidth on the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

[0155] In a fourteenth aspect, alone or in combination with one or more of the tenth to thirteenth aspects, obtaining the indication includes: determining, by the BS, to change the minimum control channel to data channel delay or to change the bandwidth of the BWP.

[0156] In a fifteenth aspect, alone or in combination with one or more of the tenth to fourteenth aspects, obtaining the indication comprises: receiving a negative acknowledgement (NACK) in response to sending the retransmission.

[0157] In a sixteenth aspect, either alone or in combination with one or more of the tenth to fifteenth aspects, obtaining the indication comprises sending a threshold number of retransmissions.

[0158] In a seventeenth aspect, alone or in combination with one or more of aspects ten to sixteen, obtaining the indication comprises sending a threshold number of second transmissions.

[0159] In the eighteenth aspect, alone or in combination with one or more of the tenth to seventeenth aspects, sending the threshold number of second transmissions includes: sending the threshold number of second transmissions during an active portion of a connected mode discontinuous reception (CDRX) configuration of the UE.

[0160] An apparatus for wireless communication, comprising: at least one processor; and a memory coupled to the at least one processor, the memory comprising code executable by the at least one processor to cause the apparatus to perform a method according to any one of the first to eighteenth aspects.

[0161] An apparatus comprising: a unit for performing the method according to any one of the first to eighteenth aspects.

[0162] A computer-readable medium having stored thereon computer-executable code for wireless communication, the computer-executable code, when executed by at least one processor, causing an apparatus to perform the method according to any one of the first to eighteenth aspects.

[0163] Additional considerations

[0164] The techniques described herein can be used for various wireless communication technologies such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), LTE-Advanced (LTE-A), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single Carrier Frequency Division Multiple Access (SC FDMA), Time Division Synchronous Code Division Multiple Access (TD-SCDMA), and other networks. The terms "network" and "system" are often used interchangeably. A CDMA network can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, and the like. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, and the like. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization named "3rd Generation Partnership Project" (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2). NR is an emerging wireless communication technology that is currently being deployed.

[0165] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the terms "cell" and "base station," next-generation Node B (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmit / receive point (TRP) are interchangeable. A base station (BS) can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residence) and can allow restricted access by UEs associated with the femtocell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a residence, etc.). A base station for a macrocell can be referred to as a macro base station. A base station for a picocell can be referred to as a pico base station. A BS for a femto cell may be referred to as a femto BS or a home BS.

[0166] A UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, customer premises equipment (CPE), a cellular phone, a smartphone, a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet computer, a camera, a gaming device, a netbook, a smartbook, an appliance, a medical device or apparatus, a biometric sensor / device, a wearable device (e.g., a smart watch, smart clothing, smart glasses, a smart wristband, smart jewelry (e.g., a smart ring, a smart bracelet, etc.)), an entertainment device (e.g., a music device, a video device, a satellite radio unit, etc.), 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) devices or evolved MTC (eMTC) devices. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node can provide, for example, connectivity to a network (e.g., a wide area network such as the Internet or a cellular network) or to a network via a wired or wireless communication link. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0167] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication between some or all devices and apparatuses within its service area or cell. The scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communications, the subordinate entities utilize the resources allocated by the scheduling entity. The BS is not the only entity that can be used as a scheduling entity. In some examples, a UE may be used as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs may utilize the resources scheduled by the UE to perform wireless communications. In some examples, a UE may be used as a scheduling entity in a peer-to-peer (P2P) network and / or in a mesh network. In the mesh network example, in addition to communicating with the scheduling entity, UEs may also communicate directly with each other.

[0168] The methods disclosed herein include one or more steps or actions for implementing the methods. These method steps and / or actions may be interchangeable with one another without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of specific steps and / or actions may be modified without departing from the scope of the claims.

[0169] As used herein, a phrase referring to "at least one of" a list of items refers to any combination of those items, including single members. For example, "at least one of a, b, or c" is intended to encompass a, b, c, ab, ac, bc, and abc, as well as any combination and multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0170] As used herein, the term "determining" includes a wide variety of actions. For example, "determining" may include calculating, computing, processing, deriving, investigating, searching (e.g., searching in a table, database, or another data structure), ascertaining, and the like. Furthermore, "determining" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Furthermore, "determining" may include resolving, selecting, choosing, establishing, and the like.

[0171] The foregoing description is provided to enable any person skilled in the art to implement the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the overall principles defined herein may be applied to other aspects. Accordingly, the claims are not intended to be limited to the aspects shown herein, but are to be given the full scope consistent with the text of the claims, wherein, unless otherwise specifically stated, reference to an element in the singular is not intended to mean "one and only one," but rather "one or more." Unless otherwise explicitly stated, the term "some" refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure are expressly incorporated herein by reference and are intended to be encompassed by the claims, as such structural and functional equivalents are known or become known to those skilled in the art. Furthermore, nothing disclosed herein is intended to be dedicated to the public, regardless of whether such disclosure is explicitly recited in the claims. No claim element is to be interpreted under 35 U.S.C. § 112, paragraph 6, unless the element is explicitly recited using the phrase "means for..." or, in the case of a method claim, the element is recited using the phrase "step for..."

[0172] The various operations of the methods described above may be performed by any suitable unit capable of performing the corresponding functions. These units may include various hardware and / or software components and / or modules, including but not limited to: circuits, application specific integrated circuits (ASICs) or processors. Generally, where there are operations shown in the figures, those operations may have corresponding paired units plus functional components with similar numbers.

[0173] The various illustrative logic blocks, modules, and circuits described in conjunction with the present disclosure may be implemented or performed using a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device (PLD), discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. A general purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices, for example, a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.

[0174] If implemented in hardware, an example hardware configuration may include a processing system in a wireless node. The processing system may be implemented using a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus may include any number of interconnecting buses and bridges. The bus may connect various circuits including a processor, a machine-readable medium, and a bus interface. In addition, the bus interface may also be used to connect a network adapter to the processing system via the bus. The network adapter may be used to implement signal processing functions at the physical layer. In a user terminal (see Figure 1 ), a user interface (e.g., a keypad, display, mouse, joystick, etc.) may also be connected to the bus. The bus may also connect various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described further. The processor may be implemented using one or more general and / or special purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits that can execute software. Those skilled in the art will recognize how to best implement the functionality described for the processing system based on the specific application and the overall design constraints imposed on the entire system.

[0175] If implemented in software, the functionality may be stored on or transmitted via a computer-readable medium as one or more instructions or codes. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, data, or any combination thereof. Computer-readable media include both computer storage media and communication media, including any medium that facilitates the transfer of computer programs from one location to another. The processor may be responsible for managing the bus and general processing, including executing software modules stored on a machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be an integral part of the processor. For example, the machine-readable medium may include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium with instructions stored thereon, separate from the wireless node, all of which may be accessed by the processor via a bus interface. Alternatively, or in addition, the machine-readable medium or any portion thereof may be integrated into the processor, for example, in the form of a cache and / or a general register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, magnetic disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. The machine-readable medium may be embodied in a computer program product.

[0176] A software module may include a single instruction or many instructions and may be distributed across several different code segments, distributed among different programs, and distributed across multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include a sending module and a receiving module. Each software module may be located in a single storage device or distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During execution of the software module, the processor may load some of the instructions into a cache to increase access speed. Subsequently, one or more cache lines may be loaded into a general register file for execution by the processor. It will be understood that when a function of a software module is mentioned below, such function is implemented by the processor when executing instructions from the software module.

[0177] Also, any connection is properly termed a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies (e.g., infrared (IR), radio, and microwave), then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies (e.g., infrared, radio, and microwave) are included in the definition of medium. As used herein, disk and disc include compact disc (CD), laser disc, optical disc, digital versatile disc (DVD), floppy disk, and optical disc. Optical disks, where magnetic disks typically reproduce data magnetically, and optical disks reproduce data optically using lasers. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Furthermore, for other aspects, computer-readable media may include transitory computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0178] Thus, certain aspects may include a computer program product for performing the operations presented herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein. For example, a computer program product for performing the operations described herein and Figure 9 and / or instructions for the operations shown in 10.

[0179] In addition, it should be understood that the modules and / or other appropriate units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station where applicable. For example, such a device can be coupled to a server to facilitate the transmission of units for performing the methods described herein. Alternatively, the various methods described herein can be provided via a storage unit (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or a floppy disk, etc.) so that the user terminal and / or base station can obtain the various methods when the storage unit is coupled to or provided to the device. In addition, any other appropriate technology for providing the methods and techniques described herein to a device can be used.

[0180] It is to be understood that the claims are not limited to the precise configuration and components shown above. Various modifications, changes and variations may be made in the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A method for wireless communication by a user equipment (UE), comprising: obtaining an indication for changing a bandwidth and a minimum control channel to data channel delay of a bandwidth part (BWP) for receiving a first transmission on the BWP; changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, and changing the bandwidth of the BWP to a new bandwidth of the BWP; as well as The first transmission is received on the BWP using the new minimum control channel to data channel delay and the new bandwidth of the BWP.

2. The method according to claim 1, wherein Changing the minimum control channel to data channel delay to the new minimum control channel to data channel delay includes changing from a first number of time slots to a second number of time slots that is less than the first number.

3. The method according to claim 1, wherein Changing the bandwidth of the BWP to the new bandwidth includes changing from a first bandwidth to a second bandwidth that is greater than the first bandwidth.

4. The method according to claim 1, wherein Obtaining the indication includes receiving the new minimum control channel to data channel delay and the new bandwidth of the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

5. The method according to claim 1, wherein Obtaining the indication includes: determining, by the UE, to change the minimum control channel to data channel delay and to change the bandwidth of the BWP.

6. The method according to claim 1, wherein Obtaining the indication includes sending a negative acknowledgement (NACK) in response to receiving the retransmission.

7. The method according to claim 6, wherein: Obtaining the indication includes receiving a threshold number of retransmissions.

8. The method according to claim 1, wherein Obtaining the indication includes receiving a threshold number of second transmissions.

9. The method according to claim 8, wherein Receiving the threshold number of second transmissions includes receiving the threshold number of second transmissions during an active portion of a connected mode discontinuous reception (CDRX) configuration.

10. A method for wireless communication by a network entity, comprising: obtaining an indication for changing a bandwidth and a minimum control channel to data channel delay of a bandwidth part (BWP) for sending a first transmission to a user equipment (UE) on the BWP; For the first transmission to the UE, changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, and changing the bandwidth of the BWP to a new bandwidth of the BWP; as well as The first transmission is sent over the BWP using the new minimum control channel to data channel delay and the new bandwidth of the BWP.

11. The method according to claim 10, wherein: Changing the minimum control channel to data channel delay to the new minimum control channel to data channel delay includes changing from a first number of time slots to a second number of time slots that is less than the first number.

12. The method according to claim 10, wherein: Changing the bandwidth of the BWP to the new bandwidth includes changing from a first bandwidth to a second bandwidth that is greater than the first bandwidth.

13. The method according to claim 10, wherein: Obtaining the indication includes receiving the new minimum control channel to data channel delay and the new bandwidth of the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

14. The method according to claim 10, wherein: Obtaining the indication includes determining, by the network entity, to change the minimum control channel to data channel delay and to change the bandwidth of the BWP.

15. The method according to claim 10, wherein Obtaining the indication includes receiving a negative acknowledgement (NACK) in response to sending the retransmission.

16. The method according to claim 15, wherein Obtaining the indication includes sending a threshold number of retransmissions.

17. The method according to claim 10, wherein Obtaining the indication includes sending a threshold number of second transmissions.

18. The method according to claim 17, wherein Sending the threshold number of second transmissions includes sending the threshold number of second transmissions during an active portion of a connected mode discontinuous reception (CDRX) configuration of the UE.

19. A wireless communication device, comprising: At least one processor and memory configured to: obtaining an indication for changing a bandwidth and a minimum control channel to data channel delay of a bandwidth part (BWP) for receiving a first transmission on the BWP; changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, and changing the bandwidth of the BWP to a new bandwidth of the BWP; as well as The first transmission is received on the BWP using the new minimum control channel to data channel delay and the new bandwidth of the BWP.

20. The device according to claim 19, wherein Changing the minimum control channel to data channel delay to the new minimum control channel to data channel delay includes changing from a first number of time slots to a second number of time slots that is less than the first number.

21. The apparatus according to claim 19, wherein Changing the bandwidth of the BWP to the new bandwidth includes changing from a first bandwidth to a second bandwidth that is greater than the first bandwidth.

22. The apparatus according to claim 19, wherein Obtaining the indication includes receiving the new minimum control channel to data channel delay and the new bandwidth of the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

23. The apparatus according to claim 19, wherein Obtaining the indication includes determining to change the minimum control channel to data channel delay and to change the bandwidth of the BWP.

24. The apparatus according to claim 19, wherein Obtaining the indication includes sending a negative acknowledgement (NACK) in response to receiving the retransmission.

25. A wireless communication device, comprising: At least one processor and memory configured to: obtaining an indication for changing a bandwidth and a minimum control channel to data channel delay of a bandwidth part (BWP) for sending a first transmission to a user equipment (UE) on the BWP; For the first transmission to the UE, changing the minimum control channel to data channel delay to a new minimum control channel to data channel delay, and changing the bandwidth on the BWP to a new bandwidth of the BWP; as well as The first transmission is sent over the BWP using the new minimum control channel to data channel delay and the new bandwidth of the BWP.

26. The device according to claim 25, wherein Changing the minimum control channel to data channel delay to the new minimum control channel to data channel delay includes changing from a first number of time slots to a second number of time slots that is less than the first number.

27. The apparatus according to claim 25, wherein Changing the bandwidth of the BWP to the new bandwidth includes changing from a first bandwidth to a second bandwidth that is greater than the first bandwidth.

28. The apparatus according to claim 25, wherein Obtaining the indication includes receiving the new minimum control channel to data channel delay and the new bandwidth on the BWP in at least one of a radio resource control (RRC) signal, a medium access control-control element (MAC-CE), or downlink control information (DCI).

29. The apparatus according to claim 25, wherein Obtaining the indication includes determining to change the minimum control channel to data channel delay and to change the bandwidth of the BWP.

30. The apparatus of claim 25, wherein: Obtaining the indication includes receiving a negative acknowledgement (NACK) in response to sending the retransmission.

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