Bandwidth fractional adaptation technique for extended reality power saving

Abstract

Certain aspects of the present disclosure provide techniques for wireless communications, and more specifically provide techniques for bandwidth part adaptation for extended reality (XR) power saving. A method that may be performed by a UE generally includes receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication to switch from the first BWP to the second BWP; and switching from the first BWP to the second BWP in response to obtaining the indication.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to U.S. Application No. 17 / 202,284, filed on March 15, 2021, which claims priority to U.S. Provisional Application No. 62 / 990,411, filed on March 16, 2020, both of which are expressly incorporated herein by reference in their entireties. Background Art Technical Field

[0003] Aspects of the present disclosure relate to wireless communications and, more particularly, to techniques for bandwidth fraction adaptation for power conservation.

[0004] Description of Related Technology

[0005] Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcast, etc. 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, by way of example, the 3rd 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.

[0006] In some examples, a wireless multiple access communication system may include multiple base stations (BS), each of which is capable of simultaneously supporting communications of multiple communication devices or user equipment (UE). In an LTE or LTE-A network, a set of one or more base stations may define an eNodeB (eNB). In other examples (e.g., in a next generation, new radio (NR) or 5G network), 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.) communicating with multiple central units (CUs) (e.g., central nodes (CNs), access node controllers (ANCs), etc.), wherein a set of one or more DUs communicating with a CU may define an access node (e.g., may be referred to as a BS, a next generation NodeB (gNB or gNodeB), a TRP, etc.). A BS or DU may communicate with a set of UEs on a downlink channel (e.g., for transmission from a BS or DU to a UE) and an uplink channel (e.g., for transmission from a UE to a BS or DU).

[0007] These multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different wireless devices to communicate at municipal, national, regional, and even global levels. New radio (e.g., 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 downlink and uplink. For these purposes, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0008] However, as the demand for mobile broadband access continues to grow, there remains a need for further improvements in NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and the telecommunication standards that use these technologies. Summary of the invention

[0009] The systems, methods, and apparatus 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 claims below, some features will now be briefly discussed. After considering this discussion, and particularly after reading the section entitled "Detailed Description of the Invention," it will be understood how the features of the present disclosure provide benefits including power savings facilitated by adaptive bandwidth fraction switching.

[0010] Certain aspects provide a method for wireless communication performed by a user equipment (UE). The method generally includes receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication to switch from the first BWP to the second BWP; and switching from the first BWP to the second BWP in response to obtaining the indication.

[0011] Certain aspects provide a method for wireless communication performed by a base station (BS). The method generally includes sending a first configuration of a first BWP and a second configuration of a second BWP to a UE, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication for the UE to switch from the first BWP to the second BWP for transmission to the UE; and in response to obtaining the indication, switching from the first BWP to the second BWP for transmission to the UE.

[0012] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes a processor configured to: receive a first configuration of a first BWP and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtain an indication to switch from the first BWP to the second BWP; and switch from the first BWP to the second BWP in response to obtaining the indication; and a memory coupled to the processor.

[0013] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes a processor configured to: send a first configuration of a first BWP and a second configuration of a second BWP to a UE, wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; obtain an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and in response to obtaining the indication, switch from the first BWP to the second BWP for transmission to the UE; and a memory coupled to the processor.

[0014] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes means for receiving a first configuration of a first BWP and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; means for obtaining an indication to switch from the first BWP to the second BWP; and means for switching from the first BWP to the second BWP in response to obtaining the indication.

[0015] Certain aspects provide an apparatus for wireless communication. The apparatus generally includes means for sending a first configuration of a first BWP and a second configuration of a second BWP to a UE, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; means for obtaining an indication for the UE to switch from the first BWP to the second BWP for transmission to the UE; and means for switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0016] Certain aspects provide a computer-readable medium having stored thereon instructions for receiving a first configuration of a first BWP and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate, obtaining an indication to switch from the first BWP to the second BWP, and switching from the first BWP to the second BWP in response to obtaining the indication.

[0017] Certain aspects provide a computer-readable medium having stored thereon instructions for sending a first configuration of a first BWP and a second configuration of a second BWP to a UE, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate, obtaining an indication for the UE to switch from the first BWP to the second BWP for transmission to the UE, and switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0018] To achieve the foregoing and related objectives, one or more aspects include features fully described below and specifically pointed out in the claims. The following description and drawings set forth in detail certain illustrative features of one or more aspects. However, these features represent only some of the various ways in which the principles of the various aspects can be used. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] A more specific description may be obtained by reference to various aspects, so that the above-mentioned features briefly summarized above of the present disclosure may be understood in more detail, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings illustrate only certain typical aspects of the present disclosure and should not be considered as limiting its scope, as the specification allows for other equally effective aspects.

[0020] Figure 1 is a block diagram conceptually illustrating an example telecommunications system in accordance with certain aspects of the present disclosure.

[0021] Figure 2 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.

[0022] Figure 3 is a table showing various fifth generation (5G) quality indicators.

[0023] Figure 4 is a table showing various use cases for extended reality (XR).

[0024] Figure 5 A wireless communication system for XR is shown.

[0025] Figure 6 Three exemplary transmission timelines are shown according to aspects of the present disclosure.

[0026] Figure 7 Two example transmission timelines illustrating a UE performing micro-sleep are shown in accordance with certain aspects of the present disclosure.

[0027] Figure 8 is a flow diagram illustrating example operations for wireless communications performed by a user equipment (UE), in accordance with certain aspects of the present disclosure.

[0028] Fig. 9 is a flow diagram illustrating example operations for wireless communications performed by a base station (BS), in accordance with certain aspects of the present disclosure.

[0029] Fig.10 Exemplary reception timelines for two bandwidth parts (BWPs) are shown in accordance with aspects of the present disclosure.

[0030] Fig.11 An exemplary transmission timeline of a BS and a corresponding exemplary reception timeline of a UE according to aspects of the present disclosure are shown.

[0031] Fig.12 Exemplary wireless communications for XR are shown.

[0032] Fig.13 is a block diagram illustrating an example architecture of a distributed radio access network (RAN) in accordance with certain aspects of the present disclosure.

[0033] Fig.14 It is shown that according to aspects of the present disclosure, a method may include being configured to perform Figure 8 The components of a communication device (eg, UE) operating as shown.

[0034] Fig.15 It is shown that according to aspects of the present disclosure, a method may include being configured to perform Fig. 9 The components of the illustrated operation are of a communication device (eg, a BS).

[0035] 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

[0036] Aspects of the present disclosure provide apparatus, methods, processing systems, and computer-readable media for power saving for bandwidth part (BWP) adaptation. For example, a UE may be configured with a first BWP for a first service and a second BWP for a second service, wherein the second service may have a quality of service parameter configured to be different from the first BWP. Depending on when the second BWP will be used for the service, the UE may be triggered to switch between the first BWP and the second BWP. BWP adaptation may provide a framework for power saving advancements, for example, for low latency and / or high reliability services, such as extended reality (XR) or remote control applications.

[0037] The following description provides examples and is not intended to limit the scope, applicability, or examples set forth in the claims. Changes may be made to the functions and arrangements of the elements discussed without departing from the scope of the present disclosure. Various processes or components may be omitted, substituted, or added to each example as appropriate. For example, the method described may be performed in an order different from that described above, and various steps may be added, omitted, or combined. In addition, the features described in some examples may be combined in some other examples. For example, any number of aspects set forth herein may be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such a device or method that uses other structures, functions, or structures and functions other than or different from the various aspects set forth herein. It should be understood that any aspect disclosed herein may be implemented by one or more elements of the claims. The word "exemplary" is used herein to refer to "used as an example, instance, or illustration". Any aspect described herein as "exemplary" may not necessarily be considered preferred or advantageous over other aspects.

[0038] The techniques described herein can be used for various wireless communication technologies, such as 3GPP Long Term Evolution (LTE), Advanced LTE (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.

[0039] A CDMA network may implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA. cdma2000 covers IS-2000, IS-95, and IS-856 standards. A TDMA network may implement radio technologies such as Global System for Mobile Communications (GSM). An OFDMA network may implement radio technologies such as NR (e.g., 5G RA), Evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE802.11 (Wi-Fi), IEEE802.16 (WiMAX), IEEE 802.20, Flash-OFDMA, etc. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS that use EUTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the Third Generation Partnership Project (3GPP). cdma2000 and UMB are described in documents from an organization named "3rd Generation Partnership Project 2" (3GPP2).

[0040] The techniques described herein can be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, although various aspects are described herein using terms commonly associated with 3G and / or 4G wireless technologies, aspects of the present disclosure can be applied to communication systems based on other generations such as 5G and beyond, including NR technologies.

[0041] 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 be a NR system (e.g., a 5G NR network). Figure 1 As shown, a user equipment (UE) 120a includes an XR BWP module 122, which may be configured to receive a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; to obtain an indication of switching from the first BWP to the second BWP; and to switch from the first BWP to the second BWP in response to obtaining the indication. Figure 1 As shown, according to aspects described herein, BS 110a also includes an XR BWP module 112, which can be configured to send a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; for obtaining an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and for switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0042] The radio access network (RAN) 150 may include a network controller 160 and a BS 110. The RAN 150 may communicate with a core network 130 and an application server (AS) 140. According to certain aspects, the BS 110 and the UE 120 may be configured for one or more services (e.g., ultra-reliable low latency communications (URLLC), enhanced mobile broadband (eMBB), XR, etc.) involving an application provider (e.g., application server 140) and / or traffic flows between the BS 110 and the UE 120 associated with one or more applications running on the UE 120. For example, the UE 120a may request admission of one or more traffic flows for services related to the application (e.g., requesting that the BS 110a be used as a link between the UE 120a and the AS 140).

[0043] like Figure 1As shown, the wireless communication network 100 may include multiple base stations (BS) 110 and other network entities. The BS may be a station that communicates with a user equipment (UE). Each BS 110 may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a Node B (NB) and / or a NB subsystem serving a coverage area, depending on the context in which the term is used. In the NR system, the term "cell" and BS, next generation NodeB (gNB or gNodeB), access point (AP), distributed unit (DU), carrier, or transmit receive point (TRP) may be used interchangeably. In some examples, the cell may not necessarily be stationary, and the geographic area of ​​the cell may move according to the location of the mobile BS. In some examples, the BS may be interconnected and / or interconnected with one or more other BSs or network nodes (not shown) in the wireless communication network 100 by using various types of backhaul interfaces (such as direct physical connections, wireless connections, virtual networks, etc.) of any appropriate transmission network.

[0044] Generally, 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. RAT can also be referred to as radio technology, air interface, etc. Frequency can also be referred to as carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency can support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0045] A BS may provide communication coverage for macro cells, pico cells, femto cells, and / or other types of cells. A macro cell may cover a relatively large geographic area (e.g., a radius of several kilometers) and may allow unrestricted access to UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access to UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access to UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG), UEs for users in a home, etc.). A BS for a macro cell may be referred to as a macro BS. A BS for a pico cell may be referred to as a pico BS. A BS for a femto cell may be referred to as a femto BS or a home BS. In Figure 1 In the illustrated example, 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. A BS may support one or more (e.g., three) cells.

[0046] 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., a BS or a UE) and sends transmissions of data and / or other information to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that relays transmissions for other UEs. Figure 1 In the illustrated example, 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 is also referred to as a relay BS, a relay, or the like.

[0047] The wireless communication network 100 may be a heterogeneous network including different types of BSs, such as a macro BS, a pico BS, a femto BS, a relay, etc. These different types of BSs may have different transmission power levels, different coverage areas, and different interference impacts in the wireless communication network 100. For example, a macro BS may have a high transmission power level (e.g., 20 watts), while a pico BS, a femto BS, and a relay may have a lower transmission power level (e.g., 1 watt).

[0048] The wireless communication network 100 may support synchronous or asynchronous operation. For synchronous operation, the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time. For asynchronous operation, the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time. The techniques described herein may be used for both synchronous and asynchronous operation.

[0049] A network controller 160 may couple to a set of BSs and provide coordination and control for these BSs. Network controller 160 may communicate with BSs 110 via a backhaul. BSs 110 may also communicate with each other (eg, directly or indirectly) via a wireless or wired backhaul.

[0050] UE 120 (e.g., 120x, 120y, etc.) may be dispersed throughout the wireless communication network 100, and each UE may be stationary or mobile. UE may also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smart phone, personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet computer, camera, gaming device, netbook, smartbook, ultrabook, appliance, medical device or medical equipment, biometric sensor / device, wearable device such as smart watch, smart clothing, smart glasses, smart bracelet, smart jewelry (e.g., smart ring, smart bracelet, etc.), entertainment device (e.g., music device, video device, satellite radio, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, global positioning system device, or any other suitable device configured to communicate via wireless or wired medium. Some UEs may be considered as 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 or to a network (e.g., a wide area network such as the Internet or a cellular network) via a wired or wireless communication link. Some UEs may be considered Internet of Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.

[0051] Some wireless networks (e.g., LTE) use orthogonal frequency division multiplexing (OFDM) on the downlink and single carrier frequency division multiplexing (SC-FDM) on the uplink. OFDM and SC-FDM divide the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier can be modulated with data. In general, modulation symbols are 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 (K) can depend on the system bandwidth. For example, the spacing of the subcarriers can be 15kHz, and the minimum resource allocation (called a "resource block" (RB)) can be 12 subcarriers (or 180kHz). Therefore, for system bandwidths of 1.25, 2.5, 5, 10, or 20 megahertz (MHz), the nominal fast Fourier transform (FFT) size can be equal to 128, 256, 512, 1024, or 2048, respectively. The system bandwidth can also be divided into subbands. For example, a subband can cover 1.8MHz (e.g., 6 RBs), and there can be 1, 2, 4, 8, or 16 subbands for system bandwidths of 1.25, 2.5, 5, 10, or 20MHz, respectively. In LTE, the basic transmission time interval (TTI) or packet duration is a subframe of 1ms. In NR, the subframe is still 1ms, but the basic TTI is called a time slot. Depending on the subcarrier spacing, a subframe contains a variable number of time slots (e.g., 1, 2, 4, 8, 16, ... time slots). NR RBs are 12 consecutive frequency subcarriers. NR can support a basic subcarrier spacing of 15kHz, while other subcarrier spacings can be defined with respect to the basic subcarrier spacing, for example, 30kHz, 60kHz, 120kHz, 240kHz, etc. Symbol and time slot lengths scale with the subcarrier spacing. The CP length also depends on the subcarrier spacing.

[0052] NR may use OFDM with CP on both uplink and downlink and includes support for half-duplex operation using TDD. Beamforming may be supported and the beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported. In some examples, the MIMO configuration in the downlink may support up to 8 transmit antennas with up to 8 streams and multi-layer downlink transmissions of up to 2 streams per UE. In some examples, multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported to have up to 8 serving cells.

[0053] In some examples, the access air interface can be scheduled. The scheduling entity (e.g., BS) allocates resources for the communication between some or all devices and equipment within its service area or cell. The scheduling entity can be responsible for scheduling, allocating, reconfiguring and releasing resources for one or more subordinate entities. In other words, for scheduled communications, the subordinate entity uses the resources allocated by the scheduling entity. The base station is not the only entity that can be used as a scheduling entity. In some examples, the UE can be used as a scheduling entity, and resources can be scheduled for one or more subordinate entities (e.g., one or more other UEs), and other UEs can use the resources scheduled by the UE for wireless communication. In some examples, the UE can be used as a scheduling entity in a point-to-point (P2P) network and / or a mesh network. In the mesh network example, the UE can communicate directly with each other in addition to communicating with the scheduling entity.

[0054] In some examples, two or more slave entities (e.g., UEs) can communicate with each other using side link signals. Real-world applications of such side link communications may include public safety, short-range services, UE-to-network relays, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh networks, and / or various other appropriate applications. Generally, a side link signal may refer to a signal that is transmitted from one slave entity (e.g., UE1) to another slave entity (e.g., UE2) without relaying the communication through a scheduling entity (e.g., UE or BS), even if the scheduling entity may be used for scheduling and / or control purposes. In some examples, the side link signal may be transmitted using a licensed spectrum (unlike wireless local area networks, which typically use unlicensed spectrum).

[0055] exist Figure 1 In FIG. 1 , a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and / or uplink. A thin dashed line with double arrows indicates potentially interfering transmissions between a UE and a BS.

[0056] Figure 2 FIG. 2 is a diagram illustrating a method for communicating with the RAN 224 and the AS 202 (eg, such as Figure 1 AS140 in the communication) CN 200 (for example, such as Figure 1 A block diagram of an example architecture of a CN 130 in FIG. Figure 2 As shown, the example architecture includes CN 200, RAN 224, UE 222, and data network (DN) 228 (eg, operator services, Internet access, or third party services).

[0057] CN 200 may host core network functions. CN 200 may be centrally deployed. To handle peak capacity, CN 200 functions may be offloaded (e.g., to Advanced Wireless Services (AWS)). Figure 2 As shown, the example CN 200 may be implemented by one or more network entities that execute network functions (NFs), including a network slice selection function (NSSF) 204, a network exposure function (NEF) 206, a NF repository function (NRF) 208, a policy control function (PCF) 210, a unified data management (UDM) 212, an application function (AF) 214, an authentication server function (AUSF) 216, an access and mobility management function (AMF) 218, a session management function (SMF) 220; a user plane function (UPF) 226, and various other functions (not shown) such as an unstructured data storage function (UDSF); a unified data repository (UDR); a 5G-equipment identity register (5G-EIR); and / or a security edge protection proxy (SEPP).

[0058] The AMF 218 may include the following functions (some or all of the AMF functions may be supported in one or more instances of the AMF): termination of the RAN control plane (CP) interface (N2); termination of the non-access stratum (NAS) (e.g., N1), NAS encryption and integrity protection; registration management; connection management; reachability management; mobility management; lawful interception (for AMF events and interfaces to L1 systems); for transmission of session management (SM) messages between the UE 222 and the SMF 220; a transparent proxy for routing SM messages; access authentication; access authorization; for transmission of short message service (SMS) messages between the UE 222 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; for communication between the UE 222 and the location management function (LMF) and the RAN 224 Transmission of location service messages between LMF; Evolved Packet Service (EPS) bearer ID allocation for interworking with EPS; and / or UE mobility event notification; and / or other functions.

[0059] SMF 220 may 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 appropriate service routing of UPF. UPF 226 may support: packet routing and forwarding, packet inspection, quality of service (QoS) processing, external protocol data unit (PDU) session points interconnected to DN 228, and anchor points for intra-RAT and inter-RAT mobility. PCF 210 may support: unified policy framework, providing policy rules to control protocol functions, and / or access subscription information for policy decisions in UDR. AUSF216 may act as an authentication server. UDM 212 may support: generation of authentication and key agreement (AKA) credentials, user identity processing, access authorization, and subscription management. NRF 208 may support: service discovery functions, and maintenance of NF archives and available NF instances. The NSSF may support: selecting a network slice instance to serve the UE 222, determining allowed network slice selection assistance information (NSSAI), and / or determining a set of AMFs to be used to serve the UE 222.

[0060] NEF 206 can support: opening of capabilities and events, providing information from external applications to the security of 3GPP network, conversion of internal / external information. AF 214 can support: application influence on service routing, access to NEF 206, and / or interaction with policy framework for policy control.

[0061] like Figure 2 As shown, CN 200 can communicate with AS 202, UE 222, RAN 224, and DN 228. In some examples, CN 200 communicates with external AS 202 via NEF 206 and / or AF 214.

[0062] A communication system such as the wireless communication network 100 (e.g., RAN 224) can provide communication services to a UE (e.g., UE 222; UE 120a). For example, 5G NR can support services such as enhanced mobile broadband (eMBB) services for wide bandwidths (e.g., 80 MHz or above), ultra-reliable low latency communications (URLLC) services, and other services including XR services described in more detail below. 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.

[0063] The business requirements of a service can be summarized via a set of parameters (e.g., QoS parameters) and associated with a business flow supporting the service. Parameters may include a packet error rate (PER), a packet delay budget (PDB), and / or a guaranteed bit rate (GBR) (not shown). PER may be a percentage of successfully received packets. For example, PER may define an upper limit on the ratio of PDUs (e.g., IP packets) that have been processed by the sender of a link layer protocol (e.g., RLC in a RAN accessed by 3GPP) but have not been successfully delivered to an upper layer (e.g., PDCP in a RAN accessed by 3GPP) by a corresponding receiver. Thus, PER may define an upper limit on a non-congestion-related packet loss rate. PDB may be defined as an upper limit on the time that a packet can be delayed between a UE (e.g., UE 222) and a UPF (e.g., UPF 226) on the CN side. GBR may indicate the bandwidth (bit rate) that the network is to guarantee.

[0064] The resource type may determine whether dedicated network resources associated with a guaranteed flow bit rate (GFBR) value for a QoS flow level are permanently allocated (e.g., by an admission control function in a radio base station), whereas non-GBR QoS flows may be pre-authorized through 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 the Maximum Data Burst Volume (MDBV) is defined to describe traffic bursts. The MDBV represents the maximum amount of data that the 5G-AN needs to serve within a period of a 5G-AN PDB (e.g., the 5G-AN portion of the PDB). The MDBV may be signaled to the RAN (e.g., RAN 224) along with a standardized indicator value (e.g., 5QI), and if received, it may be used instead of a default value.

[0065] Figure 3Table 300 in shows example QoS parameters that can be configured for various services. In some examples, conversational voice services, conversational video services (e.g., such as live streaming), and video services (e.g., such as buffered streaming) and / or TCP-based services (e.g., such as the World Wide Web, email, chat, ftp, p2p file sharing, progressive video, etc.) can be associated with eMBB services. In some examples, remote control services (e.g., UEs are remotely operated by people or computers, such as remote drivers or V2X applications to operate remote vehicles without drivers or remote vehicles located in dangerous environments) can be associated with URLLC. 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 are characterized by human interaction with the environment or people, or controlling the UE, and rely on audio-visual feedback. In use cases like VR and interactive sessions, latency requirements include latency at the application layer (e.g., codec), which can be specified outside 3GPP.

[0066] Figure 3 The QoS parameters and services shown in table 300 are merely illustrative, and various other QoS parameters and services may be specified.

[0067] At high PDB values ​​(e.g., equal to or exceeding 100ms), bursts of traffic within the PDB range can be closely approximated by GBR*PDB. For some traffic flows measured at each PDB, the percentile of the number of times the burst exceeds GBR*PDB is small relative to the PER. The impact of dropped packets in this burst on the PER of the traffic will be negligible. Therefore, the size of the traffic burst transmitted for such traffic flows may not be important. However, for traffic flows at low PDB and low PER values, the amount of traffic handled by the 5G system can be much higher than GBR*PDB. In this case, it is useful to describe the traffic burst.

[0068] As described above, MDBV is specified for traffic flows of type "delay critical GBR" that are expected to handle low throughput traffic. Thus, in some cases, the range of values ​​used for MDBV is capped at 4095 bytes (e.g., when signaled on the 5G network interface). Even for a PDB of 1 ms, the throughput cap of 4095 bytes means that the maximum throughput on that flow may not exceed 4095 bytes / ms (i.e., approximately 32.76 Mbps). The supported throughput may be even lower on traffic flows with larger PDB values. However, for certain services, such as XR services (e.g., AR, VR, cloud gaming), the throughput requirements (e.g., up to 250 Mbps) and the PDB requirements (e.g., 25 ms) may be higher.

[0069] New Radio (NR) is an emerging wireless communication technology developed in conjunction with the 5G Technology Forum (5GTF). NR access (e.g., 5G NR) can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) for wide bandwidth (e.g., 80MHz or more), millimeter wave (mmW) for high carrier frequencies (e.g., 25GHz or more), massive machine type communication MTC (mMTC) for non-backward compatible MTC technology, and / or mission-critical ultra-reliable low-latency communication (URLLC). These 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 their respective quality of service (QoS) requirements. Extended Reality (XR) is a wireless communication service for services that require low latency (e.g., packet delay budget (PDB) between 5ms and 25ms) and high bit rate (e.g., packet error rate less than or equal to 1e-3).

[0070] Figure 4 4 is a table showing various use cases for XR. For example, virtual reality (VR) can be used for cloud gaming, VR split rendering, and augmented reality (AR) split computing. Cloud gaming generally refers to games on a user device where at least some of the graphics processor unit (GPU) processing is performed on a cloud server where a more powerful GPU can be implemented. 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 computing services require low latency to maintain an acceptable gaming experience. As shown, cloud gaming can be implemented on a 5G network using QoS or application services provided over the Internet (over the top, OTT). In addition, as shown, different use cases can have different location and mobility requirements.

[0071] According to aspects of the present disclosure, the power consumption of AR devices can be a challenge to their usefulness. As a useful enhancement to smartphones, it is desirable to enable AR devices (e.g., Figure 5 The battery life of the AR glasses shown matches the expectations of smartphone battery life (i.e., a full day of use on a single charge). However, a design constraint of the AR glasses is that the battery capacity is severely limited because the proximity of the glasses to the user's forehead makes it desirable to prevent high (i.e., battery) temperatures.

[0072] In aspects of the present disclosure, AR glasses that are physically tethered to a smartphone may be a successful design given the technical constraints. Power requirements may still challenge the described form factor, 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.

[0073] Figure 5 An exemplary wireless communication system 500 (e.g., a 5G system) for XR is shown. As shown, the exemplary wireless communication system 500 may include a UE 120, a radio access network (RAN) 100 including a BS 110, and the Internet 510. In some aspects, the UE 120 may be associated with or tethered to an AR glasses 520 via, for example, a universal serial bus (USB) interface 522 for VR or AR applications. As shown, the 5G system 502 may communicate with an edge cloud server 550, which may include logical entities such as an XR edge data network (DN) 522 and an XR edge application function 524. An edge cloud server generally refers to a cloud server that is located closer to the UE, allowing data for various applications described herein to be transmitted with lower latency. For example, the latency from the CN to the XR edge server may be negligible compared to the 5G system latency. As shown, the edge cloud server 550 may be associated with an XR public cloud AF 530.

[0074] According to aspects of the present disclosure, the XR downlink traffic may be H.264 and / or H.265 encoded video. The video may be quasi-periodic with one burst per frame, such that the burst rate in bursts per second is equal to the frame rate of the video in frames per second (fps). Alternatively, the video may be quasi-periodic with two possibly staggered "eye-buffers" per frame, such that the burst rate in bursts per second is equal to twice the frame rate in fps.

[0075] In the disclosed aspects, a frame may be split into multiple files, with each file being processed individually.

[0076] According to aspects of the present disclosure, the file for each frame may be intra-coded (i.e., I-frame), predicted (i.e., P-frame), or bi-directionally predicted (i.e., B-frame). Typically, an I-frame may include a complete video frame or image, similar to a JPG or BMP image file. In contrast, a P-frame may include only the changes in the image from a previous frame. For example, only the portions of the image that have changed since the previous frame are encoded, while pixels in the frame that have not changed (e.g., background) are not stored by the encoder, thereby saving space. Thus, an I-frame is typically larger (e.g., in number of bits) than a P-frame. A B-frame saves even more space by using the difference between the current frame and both the previous frame and the following frame to indicate its content. Thus, a B-frame may typically be smaller than an I-frame and a P-frame.

[0077] In aspects of the present disclosure, uplink transmissions for cloud gaming applications include controller information, while uplink transmissions for VR split rendering include controller information and user gesture information.

[0078] According to aspects of the present disclosure, the period of uplink transmission may be higher than that of downlink (DL) transmission to transmit the latest information from the controller to the server.

[0079] In aspects of the present disclosure, the AR split compute architecture may include a second stream for AR uplink transmission, for computer vision (e.g., determining user pose information), on the edge and / or the cloud.

[0080] Figure 6 Three exemplary transmission timelines 600, 620, and 640 are shown according to aspects of the present disclosure. Exemplary transmission timeline 600 shows XR downlink traffic. As previously described, downlink traffic can be quasi-periodic, with bursts that match the frame rate of the encoded video. Exemplary timeline 600 shows how the burst size can vary, with exemplary bursts for I frames at 605 and exemplary bursts for P frames at 610. Exemplary transmission timeline 620 shows VR split rendering uplink traffic. As previously described, VR split rendering uplink traffic can include periodic bursts 625 of similar size that occur more frequently than XR downlink traffic bursts. Exemplary transmission timeline 640 shows uplink traffic for an AR split computing architecture. As previously described, uplink traffic can include both periodic small bursts 645 for controller information and larger bursts 650 at a lower rate for computer vision.

[0081] According to aspects of the present disclosure, currently known connected discontinuous reception (C-DRX) technology does not work well for XR services. Although C-DRX was introduced in LTE, Release 15 (Rel-15) NR inherits a similar design. Current C-DRX technology is designed for power saving of delay-tolerant services (e.g., web browsing). In current C-DRX technology, the "enter sleep" behavior is controlled by a DRX inactivity timer and a "DRX command" based on a media access control control element (MAC-CE).

[0082] In aspects previously known in the present disclosure, the DRX inactivity timer is essentially an implicit "go to sleep (GTS)" signaling based on scheduling activity. A dilemma often arises with the DRX inactivity timer configuration, that is, if the DRX inactivity timer is configured for too long a period, then the power saved by using C-DRX is reduced. However, if the DRX inactivity timer is configured for too short a period, then the UE will go to sleep too quickly, which causes the service to be postponed to the next "wake-up" cycle and increases latency.

[0083] In aspects of the present disclosure, since XR traffic is both latency sensitive and quasi-periodic, it is desirable to develop C-DRX enhancements.

[0084] According to aspects of the present disclosure, efficiency improvements for short C-DRX cycles include explicit GTS commands, since for short DRX cycles, the delay for the UE to return to sleep can be a huge loss for power savings. The use of explicit indications can be superior to implicit signaling based on the DRX inactivity timer. However, MAC-CE based DRX commands have a latency of 3 milliseconds, which is too high a latency for XR applications.

[0085] According to aspects of the present disclosure, it may be advantageous to align the start of a DRX cycle and a start offset for the DRX cycle with a traffic burst cycle. However, this type of alignment is not supported in currently known NR technologies.

[0086] In aspects of the present disclosure, cross-slot scheduling (i.e., using a control channel in a current slot to schedule transmissions in later (multiple) slots) can facilitate enhanced micro-sleep techniques. In cross-slot scheduling, the BS (e.g., gNB) guarantees to the UE that each data transmission allocation is scheduled across slots, so that the UE's DL control channel processing will not be in the critical path for micro-sleep decisions. That is, with cross-slot scheduling, since the UE is guaranteed that the control channel does not schedule any data transmission in the same slot, the UE can receive the control channel at the beginning of the slot and immediately go to sleep for the remainder of the slot. (K0=1 is shown)

[0087] According to aspects of the present disclosure, cross-slot scheduling may be particularly important for larger subcarrier spacing (SCS) technologies because with larger SCS, the slot duration becomes shorter, and the fixed SW and / or HW delays used for DL ​​control channel processing reduce the portion of each slot that can be used for micro-sleep, compromising power savings.

[0088] In aspects previously known in the present disclosure, cross-slot scheduling is supported in Rel-15 and enhanced in Release 16 (Rel-16). In Rel-15, the K0 (i.e., control channel to data channel delay for PDSCH) value that may be indicated in the scheduling DCI may be RRC-configured in the time domain resource allocation (TDRA) table. 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 that the minimum K0 is non-zero, if so, then the UE may perform extended micro-sleep. In Rel-16, an explicit threshold for the minimum K0 may be configured. The above discussion may also be applied to K2 (i.e., control channel to data channel delay for PUSCH) in a similar manner. That is, in Rel-15, the K2 (i.e., control channel to data channel delay for PUSCH) value that may be indicated in the scheduling DCI may be RRC-configured in the time domain resource allocation (TDRA) table. The gNB can ensure that all configured K2 values ​​are greater than some minimum non-zero value. The UE can 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 minimum K2 can be configured.

[0089] Figure 7 Two exemplary transmission timelines 700 and 750 showing a UE performing micro-sleep according to aspects of the present disclosure are shown. In the exemplary transmission timeline 700, cross-slot scheduling is not used. Thus, because the UE cannot start micro-sleep until the UE decodes the corresponding control channels 714 and 724, during time slots 710 and 720, the UE continues to receive in parts 712 and 722 of the time slot. Cross-slot scheduling is used in the exemplary transmission timeline 750. Thus, because the corresponding control channels 764 and 774 are in earlier time slots 752 and 760 and the UE has decoded these control channels, which inform the UE that there is no grant for the UE during the period 762 and 772, during time slots 760 and 770, the UE performs micro-sleep for a longer period 762 and 772.

[0090] According to aspects of the present disclosure, using a minimum control channel to data channel delay of 1 slot (eg, minimum K0=1) for unicast PDSCH scheduling may result in slightly increased latency during traffic bursts, but as mentioned above with reference to Figure 7 As shown, power savings are achieved due to the longer micro-sleep time.

[0091] In aspects of the present disclosure, a minimum control channel to data channel delay of 1 slot is adopted, and the UE still performs PDCCH monitoring in each slot during the period between traffic bursts. Thus, it is expected that more improvements will be developed for extended reality operation. Parameters K0 and K2 may be referred to as minimum scheduling offsets for PDSCH and PUSCH, respectively. K0 and K2 may provide the minimum allowed delay between receiving a scheduling grant or other control signaling on a control channel (e.g., PDCCH) and transmitting on a data channel (e.g., PDSCH or PUSCH). In various aspects, K0 and K2 may be indicated in terms of slots or any other time domain resource units.

[0092] Example bandwidth partial adaptation for extended reality

[0093] As shown above, one or more aspects of the present disclosure provide bandwidth fraction adaptation for services with different service rates, such as XR services and voice / video services. For example, various aspects of the present disclosure describe BWP switching for dynamically adapting to changes in services over time, PDCCH monitoring period techniques for XR or other low-latency and / or high-reliability services, and cross-slot scheduling adaptation for XR. In aspects of the present disclosure, through other techniques used together with BWP adaptation, BWP adaptation can provide a framework for power saving improvements for low-latency and / or high-reliability services such as XR or remote control applications.

[0094] According to aspects of the present disclosure, the PDCCH monitoring period may be part of the BWP configuration. That is, each BWP may include a configuration of a period for monitoring the PDCCH in the BWP.

[0095] In aspects of the present disclosure, timing parameters (eg, K0, K1, and K2) may also be part of the BWP configuration.

[0096] According to aspects of the present disclosure, the semi-static configuration of the set of values ​​K0, K1, and K2 for a UE may be BWP-specific.

[0097] In aspects of the present disclosure, based on traffic arrival for a UE (e.g., traffic bursts for XR operations), a BS (e.g., gNB) may decide and signal a transition between BWPs for the UE.

[0098] According to aspects of the present disclosure, signaling (eg, by a BS) of transitions between BWPs for a UE may be used for both sub-6 GHz (Sub6) and millimeter wave (mmW) bands.

[0099] Figure 8 800 for wireless communications in accordance with certain aspects of the present disclosure. Operations 800 may be performed, for example, by a user equipment (UE) (e.g., UE 120 in wireless communication network 100). Operations 800 may be implemented as a processor (e.g., Fig.13 In addition, the UE may transmit and receive signals in operation 800 by, for example, one or more antennas (e.g., Fig.13 In some aspects, the transmission and / or reception of signals by the UE may be implemented via a bus interface through which one or more processors (eg, controller / processor 1380) acquire and / or output signals.

[0100] At block 805, operations 800 may begin, where the UE may receive a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, where the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate. For example, the first BWP may be configured with a monitoring period for a downlink control channel that is less frequent than another monitoring period configured for the second BWP. In other words, the UE may monitor downlink control message transmissions on the second BWP at a higher frequency than on the first BWP. The difference in configuration between the first BWP and the second BWP may enable power savings when the UE switches between services with lower traffic rates (e.g., eMBB services such as email, chat, file sharing, video, social media, etc.) and other services with higher traffic rates (e.g., XR services). The different traffic rates between the first configuration and the second configuration may indicate different or separate services for which the BWPs are configured. In various aspects, the first and second BWPs may be configured for different reliabilities (e.g., lower and higher PERs), different delays (e.g., lower and higher PDBs), or other quality of service parameters associated with different or separate services. That is, the first BWP may be configured for a first service (e.g., a voice or video eMBB service), and the second BWP may be configured for a second service (e.g., an XR or remote control application). For example, certain QoS rules may be associated with the first BWP and the second BWP, such that a first set of QoS rules may be associated with the first BWP to facilitate the first service with lower power consumption than the second service, and a second set of QoS rules may be associated with the second BWP to facilitate the second service. In certain aspects, the first BWP may be configured for lower power consumption than the second BWP, such as the first BWP being configured with shorter monitoring opportunities, less frequent monitoring opportunities, smaller bandwidth, and / or fewer antennas than the second BWP.

[0101] Operations 800 continue to block 810, where the UE may obtain an indication to switch from the first BWP to the second BWP. For example, as further described herein, the UE may receive a command to switch from the first BWP to the second BWP from a base station, such as a base station.

[0102] Operation 800 continues to block 815, where, in response to obtaining the indication, the UE may switch from the first BWP to the second BWP. After the switch, the UE may communicate with the base station via the second BWP. For example, the UE may receive XR services from the base station via the second BWP, such as those described herein. Figure 6 In some cases, the UE may send XR services to the base station via the second BWP, for example, Figure 6 as described.

[0103] According to aspects of the present disclosure, a first configuration of block 805 may include a first minimum control channel to data channel delay for a first BWP (e.g., a specific value for K0 and / or K2), a second configuration of block 805 may include a second minimum control channel to data channel delay for a second BWP, and the second minimum control channel to data channel delay may be less than the first minimum control channel to data channel delay. For example, the second minimum control channel to data channel delay may be configured as zero time slots (facilitating same time slot scheduling), and the first minimum control channel to data channel delay may be configured as one or more time slots.

[0104] In aspects of the present disclosure, the first configuration of block 805 may include a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, the second configuration may include a second period for monitoring the PDCCH on a second BWP, and the second period may be less than the first period. In other words, the second period may provide a higher frequency monitoring window than the first period. Stated another way, the second period may provide a DRX period that is shorter than the DRX period of the first period. For example, the second period may provide PDCCH monitoring in at least each time slot, and the first period may provide PDCCH monitoring in every other time slot.

[0105] According to aspects of the present disclosure, the first configuration of block 805 may include a first bandwidth of a first BWP, the second configuration of block 805 may include a second bandwidth of a second BWP, and the second bandwidth may be greater than the first bandwidth. The size of the bandwidth may be in the form of a frequency domain resource unit, such as a physical resource block (PRB). As an example, the second bandwidth may allocate more PRBs than the first bandwidth.

[0106] In aspects of the disclosure, a first configuration of block 805 may support a first number of receive antennas for a first BWP, a second configuration of block 805 may support a second number of receive antennas for a second BWP, and the second number of receive antennas may be greater than the first number of receive antennas.

[0107] Those skilled in the art will appreciate that the parameters described herein with respect to the first and second configurations are exemplary only. In addition to or as an alternative to those described, additional parameters or parameter types may be used, such as the first and second configurations having different subcarrier spacings, different frequency locations, and / or different frequency bands (e.g., below 6 GHz and mmW bands).

[0108] In various aspects, the first and second configurations may be configurations associated with a particular BWP. For example, a downlink or uplink BWP may include a BWP identifier, a set of BWP parameters (e.g., frequency location, bandwidth size, and / or subcarrier spacing), and a PDSCH or PUSCH configuration, wherein the PDSCH or PUSCH configuration may provide various channel-specific parameters, such as a TDRA table indicating potential values ​​for K0 or K2.

[0109] According to aspects of the present disclosure, the indication of block 810 may include a command received by the UE to switch from the first BWP. With respect to operation 800, the UE may receive a command from the base station indicating a switch from the first BWP to the second BWP, and perform the switch at block 815 in response to the command.

[0110] In aspects of the present disclosure, the indication of block 810 may include a trigger detected in a physical (PHY) layer of a transceiver in the UE, wherein the trigger is sent by at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack in a transceiver in a base station (BS). When one or a combination of upper layers (e.g., MAC, RLC, or PDCP layers) of a protocol stack at a base station anticipates or prepares for a burst of traffic at a higher traffic rate, the (multiple) upper layers may directly signal the physical layer at the base station to trigger a switch to a second BWP before the data packet actually arrives at the physical layer. For example, in response to an advance protocol stack signaling at the base station, the UE may receive an indication of a switch to a second BWP from the base station. In other words, the base station may implement an advance protocol stack signaling that facilitates triggering the UE to switch to the second BWP.

[0111] According to aspects of the present disclosure, the indication of block 810 may include expiration of a periodic timer for switching to a second BWP. For example, the UE may be configured with a periodic timer for switching from a first BWP to a second BWP and then switching from the second BWP to the first BWP in certain situations, e.g., Fig.11 as described.

[0112] In aspects of the present disclosure, the indication of block 810 may include at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE. With respect to operation 800, the UE may send a BSR or SR to the base station indicating that the UE has a higher traffic rate to be transmitted to the base station, and in response to sending the BSR or SR to the base station, the UE may switch to the second BWP in advance at block 510 before receiving a UL grant from the base station that facilitates low-latency transmission of the higher rate traffic to the base station.

[0113] According to aspects of the present disclosure, the indication of block 810 may include an uplink (UL) grant received by the UE. For example, the UE may receive a UL grant from a base station, and in response to the UL grant, the UE may switch to the second BWP.

[0114] In certain aspects, the UE may obtain another indication to switch from the second BWP to the first BWP, such as described herein with respect to an indication to switch from the first BWP to the second BWP. In response to obtaining the other indication, the UE may switch from the second BWP to the first BWP. Switching between the first BWP and the second BWP may achieve power savings at the UE. As an example, the UE may monitor the PDCCH less frequently with the first BWP than with the second BWP, which may enable the UE to consume less power when the first BWP is activated than when the second BWP is activated. In certain situations, the UE may communicate with fewer antennas when the first BWP is activated than when the second BWP is activated, which may enable the UE to consume less power when the first BWP is activated than when the second BWP is activated.

[0115] In aspects of the present disclosure, a UE performing operation 800 may receive a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher traffic rate of I frames; receive another indication that P frames are to be sent to the UE; and determine to switch to the second BWP based on the other indications.

[0116] Fig. 9 900 for wireless communication in accordance with certain aspects of the present disclosure. Operations 900 may be performed, for example, by a BS (e.g., such as BS 110 in wireless communication network 100). Operations 900 may be complementary to operations 800 performed by a UE. Operations 900 may be implemented as a process on one or more processors (e.g., Fig.13 In addition, the transmission and reception of signals by the BS in operation 900 may be performed by, for example, one or more antennas (e.g., Fig.13In some aspects, the transmission and / or reception of signals by the BS may be implemented via a bus interface that acquires and / or outputs signals of one or more processors (eg, the controller / processor 1340).

[0117] Operations 900 may begin at block 905 where the BS may send a first configuration of a first BWP and a second configuration of a second BWP to a UE, where the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate.

[0118] Operations 900 may continue at block 910 where the BS may obtain an indication for transmission to the UE to switch the UE from the first BWP to the second BWP.

[0119] At block 915, operations 900 may continue, where, in response to obtaining the indication, the BS may switch from the first BWP to the second BWP for communicating with the UE. After switching from the first BWP to the second BWP, the BS may communicate with the UE via the second BWP. For example, the BS may send XR services to the UE via the second BWP, such as Figure 6 In some cases, the BS may receive XR services from the UE via the second BWP, for example, Figure 6 as described.

[0120] According to aspects of the present disclosure, a first configuration of box 905 may include a first minimum control channel to data channel delay for a first BWP (e.g., a specific value for K0 and / or K2), a second configuration of box 905 may include a second minimum control channel to data channel delay for a second BWP, and the second minimum control channel to data channel delay may be less than the first minimum control channel to data channel delay.

[0121] In aspects of the present disclosure, a first configuration of box 905 may include a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, a second configuration of box 905 may include a second period for monitoring the PDCCH on a second BWP, and the second period may be less than the first period, for example, as described herein with respect to operation 800.

[0122] According to aspects of the disclosure, the first configuration of block 905 may include a first bandwidth of a first BWP, the second configuration of block 905 may include a second bandwidth of a second BWP, and the second bandwidth may be greater than the first bandwidth, eg, as described herein with respect to operation 800 .

[0123] In aspects of the present disclosure, a first configuration of box 905 may support a first number of receive antennas for a first BWP (e.g., by a rank indicator indicating the number of receive antennas supported), and a second configuration of box 905 may support a second number of receive antennas for a second BWP, and the second number of receive antennas may be greater than the first number of receive antennas, such as described herein with respect to operation 800.

[0124] According to aspects of the present disclosure, the indication of block 910 may include the arrival of traffic for the UE at a physical layer of a protocol stack of a transceiver in the BS, e.g., as described herein with respect to operation 800. In various aspects, the base station may detect the arrival of certain traffic at the physical layer, such as traffic with higher reliability (e.g., PER), lower latency (e.g., PDB), and / or higher traffic rate (e.g., data rate or bit rate) than other traffic scheduled on the first BWP. The base station may send a command to the UE indicating a switch from the first BWP to the second BWP in response to detecting the traffic, and perform the switch at block 915 in response to the command.

[0125] In aspects of the present disclosure, the indication of block 910 may include at least one of a MAC layer, an RLC layer, or a PDCP layer of a protocol stack of a transceiver in the BS sending a trigger to the UE, wherein the trigger is sent based on another indication of preparing a burst of traffic, e.g., as described herein with respect to operation 800. When one or a combination of upper layers (e.g., a MAC, RLC, or PDCP layer) of the protocol stack at the base station anticipates or prepares a burst of traffic at a higher traffic rate (higher reliability or lower latency than configured for the first BWP), the upper layer(s) may directly signal the physical layer at the base station to trigger a switch to the second BWP before the data packets actually arrive at the physical layer.

[0126] In certain aspects, the early trigger may be based at least in part on predicting the arrival of a burst of traffic at the UE. As an example, the base station may determine a periodicity of a burst pattern, such as when XR traffic will periodically arrive from an application server for downlink transmission to the UE. Based on the determined burst pattern, anticipating receipt of downlink XR traffic from the application server, the base station may signal the UE in advance to switch to the second BWP.

[0127] According to aspects of the present disclosure, the indication of block 910 may include expiration of a periodic timer for switching to a second BWP, e.g., as described herein with respect to operation 800. As an example, the base station may be configured with a periodic timer for switching from a first BWP to a second BWP and then switching from the second BWP to the first BWP in certain situations, e.g., as described herein with respect to operation 800. Fig.11 as described.

[0128] In aspects of the present disclosure, the indication of block 910 may include at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE, such as described herein with respect to operation 800 .

[0129] According to aspects of the present disclosure, the indication of block 910 may include an uplink (UL) grant sent by the BS to the UE, eg, as described herein with respect to operation 800 .

[0130] In certain aspects, the base station may obtain another indication to switch from the second BWP to the first BWP, such as described herein with respect to an indication to switch from the first BWP to the second BWP. In response to obtaining the other indication, the base station may switch from the second BWP to the first BWP. Switching between the first BWP and the second BWP for communication between the base station and the UE may achieve power savings at the UE.

[0131] In aspects of the present disclosure, a BS performing operation 900 may send a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher traffic rate of I frames; obtain another indication that the P frames are to be sent to the UE; and determine to switch to the second BWP based on the other indications.

[0132] Fig.10 Exemplary receive timelines 1000 and 1050 for two BWPs: BWP1 and BWP2 according to aspects of the present disclosure are shown. In the exemplary receive timeline 1000, the UE's receive operation for BWP1 is shown, which is configured for small traffic and lower traffic rates. As described above, the configuration can include a larger non-zero minimum K0 (e.g., 1 or 4 slots), a sparser PDCCH monitoring period (e.g., 2 slots), a narrower bandwidth for the BWP, and support for fewer receive antennas than the corresponding configuration for BWP2. In the exemplary receive timeline 1050, the UE's receive operation for the BWP2 configuration is shown, which is configured for traffic bursts. As described above, the configuration can include a smaller minimum K0 (e.g., 0), PDCCH monitoring per slot (e.g., a PDCCH monitoring period of 1 slot), a wider bandwidth for the BWP, and support for a greater number of receive antennas than the corresponding configuration for BWP1.

[0133] Fig.11An exemplary transmission timeline 1100 of a BS (e.g., a gNB) and a corresponding exemplary reception timeline 1150 of a UE are shown according to aspects of the present disclosure. At 1152 and 1162, the BS provides explicit signaling to the UE, and the explicit signaling may instruct the UE to switch between operating on BWP1 for power saving and operating on BWP2 for traffic bursts. In aspects of the present disclosure, the explicit signaling may be either a DL scheduling DCI or a UL scheduling DCI. According to some aspects of the present disclosure, in response to expiration of a BWP inactivity timer (e.g., for BWP2) instead of an explicit DCI, the UE may switch to BWP1, as shown in 1154. At 1164, the BS provides explicit signaling for the UE to switch between operating on BWP2 for receiving traffic bursts and operating on BWP1 for power saving. In some such aspects, the BS (e.g., gNB) may configure BWP1 as the "default BWP" for the UE, and configure the BWP inactivity timer to a small value, but not so small that the BWP inactivity timer will expire during a burst (including some intervals within a burst). According to some aspects of the present disclosure, if the BS (e.g., gNB) can estimate the arrival time of a traffic burst, then upon arrival of the burst, the BS may switch to BWP2 in advance and cause the UE to switch to BWP2 in advance, as shown in 1172. In such an aspect, when the BS estimates the arrival of the burst, the active BWP is BWP1. In aspects of the present disclosure, if switching BWPs is performed only upon actual arrival of a traffic burst, additional delays for traffic (e.g., up to 3 ms of BWP switching delay) may occur.

[0134] According to aspects of the present disclosure, when traffic arrives at the physical layer of the protocol stack from an application (eg, an XR application), switching from a first BWP configured for a lower traffic rate to a second BWP configured for a higher traffic rate may be triggered.

[0135] In aspects of the present disclosure, when one or a combination of upper layers of the protocol stack (e.g., MAC, RLC, or PDCP layers) anticipates and / or prepares for a burst of traffic, the upper layer(s) may directly signal the physical (PHY) layer to trigger a switch to a second BWP configured for a higher traffic rate, even before data packets actually arrive at the physical layer.

[0136] According to aspects of the present disclosure, switching from a first BWP configured for a lower traffic rate to a second BWP configured for a higher traffic rate may be triggered based on traffic burst arrival prediction.

[0137] In aspects of the present disclosure, a periodic timer (e.g., different from a DRX timer) may be configured to periodically switch to a second BWP configured for a higher traffic rate. In some aspects of the present disclosure, such a periodic timer may be similar to a BWP inactivity timer, but the periodic timer is always looping and is always running or running whenever an XR application is activated. In such aspects, when the timer expires, the timer triggers a switch to a second BWP unless the BWP is already activated.

[0138] According to aspects of the present disclosure, a UE or BS (e.g., a gNB) may use a BSR or SR from the UE as a trigger to switch to a second BWP configured for a higher traffic rate. In some such aspects, the UE or BS may switch to a third BWP optimized for uplink traffic (e.g., when there is no DL traffic).

[0139] In aspects of the present disclosure, a UE or BS (e.g., gNB) may be triggered by a UL grant to switch to a second BWP configured for a higher traffic rate.

[0140] According to aspects of the present disclosure, BWP configurations for supporting traffic bursts (e.g., for XR applications) may be further improved. In some aspects of the present disclosure, XR traffic arrival may be for I frames or P frames. As previously described, I frames are significantly larger (approximately 3 times) in size than P frames, but these two types of frames have similar deadline requirements. In aspects of the present disclosure, as an alternative to configuring a single BWP to handle traffic bursts, multiple BWPs may be configured, each BWP being cut to a different traffic level. For example, a first BWP may be configured for traffic between bursts, while a second BWP is configured to handle traffic bursts containing I frames and a third BWP is configured to handle traffic bursts containing P frames. In some such aspects, the peak throughput supported by the second BWP may be higher than the peak throughput supported by the third BWP, and the expected average power consumption for the third BWP may be lower than the expected average power consumption for the second BWP. In such aspects, depending on whether the traffic burst transmits an I frame or a P frame, the UE may switch to either the second BWP or the third BWP for the traffic burst.

[0141] Fig.12 Exemplary wireless communication systems 1200 (e.g., 5G systems) and 1250 for XR are shown. The exemplary wireless communication system includes Figure 5Many of the same components shown will not be described further. As shown, the exemplary wireless communication system 1200 includes AR glasses, and the AR glasses include a 5G transceiver, so that the AR glasses are actually UEs. The exemplary wireless communication system 1250, AR glasses 1270 are associated with the UE via a wireless connection such as a Wi-Fi Direct (WiFi-D) connection 1272 and / or a 5G side link connection 1274.

[0142] Fig.13 It is shown (for example, in Figure 1 The example components 1300 of the BS 110a and the UE 120a in the wireless communication network 100 of the present disclosure may be used to implement aspects of the present disclosure. For example, the antenna 1352, the processors 1366, 1358, 1364, and / or the controller / processor 1380 of the UE 120a and / or the antenna 1334, the processors 1320, 1330, 1338, and / or the controller / processor 1340 of the BS 110a may be used to perform the various techniques and methods described herein.

[0143] At BS 110a, a transmit processor 1320 may receive data from a data source 1312 and control information from a controller / processor 1340. The control information may be for a physical broadcast channel (PBCH), a physical control format indicator channel (PCFICH), a physical hybrid ARQ indicator channel (PHICH), a PDCCH, a group common PDCCH (GC PDCCH), etc. The data may be for a PDSCH, etc. The processor 1320 may process (e.g., encode and symbol map) the data and the control information, respectively, to obtain data symbols and control symbols. The transmit processor 1320 may also generate reference symbols, such as a primary synchronization signal (PSS), a secondary synchronization signal (SSS), and a cell-specific reference signal (CRS). A transmit (TX) multiple-input multiple-output (MIMO) processor 1330 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, and / or reference symbols (if applicable), and may provide output symbol streams to modulators (MODs) 1332a-1332t. Each modulator 1332 may process a corresponding output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal. The downlink signals from modulators 1332a-1332t may be transmitted via antennas 1334a-1334t, respectively.

[0144] At UE 120a, antennas 1352a-1352r can receive downlink signals from BS 110a and can provide received signals to demodulators (DEMODs) in transceivers 1354a-1354r, respectively. Each demodulator 1354 can condition (e.g., filter, amplify, downconvert, and digitize) a corresponding received signal to obtain input samples. Each demodulator can further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 1356 can obtain received symbols from all demodulators 1354a-1354r, perform MIMO detection on the received symbols (if applicable), and provide detected symbols. A receive processor 1358 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to a data sink 1360, and provide decoded control information to a controller / processor 1380.

[0145] At the uplink UE 120a, a transmit processor 1364 may receive and process data from a data source 1362 (e.g., for a physical uplink shared channel (PUSCH)) and control information from a controller / processor 1380 (e.g., for a physical uplink control channel (PUCCH)). The transmit processor 1364 may also generate reference symbols for reference signals (e.g., for a sounding reference signal (SRS)). The symbols from the transmit processor 1364 may be precoded by a TX MIMO processor 1366 (if applicable), further processed by a demodulator in the transceiver 1354a-1354r (e.g., for SC-FDM, etc.), and transmitted to the BS 110a. At BS 110a, the uplink signal from UE 120a may be received by antenna 1334, processed by modulator 1332, detected by MIMO detector 1336 (if applicable), and further processed by receive processor 1338 to obtain decoded data and control information sent by UE 120a. Receive processor 1338 may provide decoded data to data sink 1339 and decoded control information to controller / processor 1340.

[0146] Memories 1342 and 1382 may store data and program codes for BS 110a and UE 120a, respectively. A scheduler 1344 may schedule UEs for data transmission on the downlink and / or uplink.

[0147] Controllers / processors 1340 and 1380 may direct operations at BS 110 and UE 120, respectively. In some configurations, user equipment (UE) 120 includes an XR BWP module 1392 configured to receive a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; to obtain an indication to switch from the first BWP to the second BWP; and to switch from the first BWP to the second BWP in response to obtaining the indication. In some configurations, BS 110 also includes an XR BWP module 1390, which may be configured to send a first configuration of a first bandwidth part (BWP) and a second configuration of the second BWP to a user equipment (UE), wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; to obtain an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and to switch from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication. Controller / processor 1340 and / or other processors and circuits at BS 110 may perform or direct the execution of processes for the techniques described herein. Memories 1342 and 1382 may store data and program codes for BS 110 and UE 120, respectively. Scheduler 1344 may schedule data transmissions of UEs on the downlink and / or uplink.

[0148] Fig.14 A communication device 1400 (eg, UE) is shown, which may include various components (eg, components corresponding to means-plus-functions) configured to perform operations for the techniques disclosed herein, such as Figure 8 The communication device 1400 includes a processing system 1402 coupled to a transceiver 1408. The transceiver 1408 is configured to transmit and receive signals for the communication device 1400, such as the various signals described herein, via an antenna 1410. The processing system 1402 may be configured to perform processing functions for the communication device 1400, including processing signals received and / or to be transmitted by the communication device 1400.

[0149] The processing system 1402 includes a processor 1404 coupled to a computer-readable medium / memory 1412 via a bus 1406. In some aspects, the computer-readable medium / memory 1412 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1404, cause the processor 1404 to perform Figure 8The operations shown, or other operations for performing various techniques discussed herein. In some aspects, the computer-readable medium / memory 1412 stores code for receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate 1414, code for obtaining an indication of switching from the first BWP to the second BWP 1415, and code for switching from the first BWP to the second BWP in response to obtaining the indication 1416. In some aspects, the processor 1404 has circuitry configured to implement the code stored in the computer-readable medium / memory 1412. The processor 1404 includes circuitry 1420 for receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate, circuitry 1422 for obtaining an indication for causing the UE to switch from the first BWP to the second BWP for transmission to the UE, and circuitry 1424 for switching from the first BWP to the second BWP in response to obtaining the indication.

[0150] Fig.15 A communication device 1500 (e.g., a base station and / or a network controller) is shown, which may include components (e.g., components corresponding to means-plus-functions) configured to perform operations for the techniques disclosed herein, such as Fig. 9 The communication device 1500 includes a processing system 1502 coupled to a transceiver 1508. The transceiver 1508 is configured to transmit and receive signals for the communication device 1500, such as the various signals described herein, via an antenna 1510. The processing system 1502 may be configured to perform processing functions for the communication device 1500, including processing signals received and / or to be transmitted by the communication device 1500.

[0151] The processing system 1502 includes a processor 1504 coupled to a computer-readable medium / memory 1512 via a bus 1506. In some aspects, the computer-readable medium / memory 1512 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 1504, cause the processor 1504 to perform Fig. 9The operations shown, or other operations for performing various techniques discussed herein. In some aspects, the computer-readable medium / memory 1512 stores code for transmitting a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate 1514, code for obtaining an indication of switching from the first BWP to the second BWP 1515, and code for switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication 1516. In some aspects, the processor 1504 has circuitry configured to implement the code stored in the computer-readable medium / memory 1512. The processor 1504 has a circuit 1520 for sending a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate, a circuit 1522 for obtaining an indication for the UE to switch from the first BWP to the second BWP for transmission to the UE, and a circuit 1524 for switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0152] Example aspects

[0153] In addition to the aspects described above, specific combinations of aspects are within the scope of the present disclosure, some of which are detailed below:

[0154] Aspect 1. An apparatus for wireless communication, comprising: a transceiver configured to receive a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; a memory; and a processor coupled to the memory, the processor and the memory configured to obtain an indication of switching from the first BWP to the second BWP; and wherein the transceiver is further configured to switch from the first BWP to the second BWP in response to obtaining the indication.

[0155] Aspect 2. An apparatus according to Aspect 1, wherein the first configuration includes a first minimum control channel to data channel delay for a first BWP, wherein the second configuration includes a second minimum control channel to data channel delay for a second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

[0156] Aspect 3. An apparatus according to any one of Aspects 1 or 2, wherein: the first configuration includes at least one of a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, a first bandwidth of the first BWP, or support for a first number of receive antennas for the first BWP; the second configuration includes a second period for monitoring PDCCH on a second BWP, a second bandwidth of the second BWP, or support for a second number of receive antennas for the second BWP; the second period is smaller than the first period; the second bandwidth is larger than the first bandwidth; and the second number of receive antennas is larger than the first number of receive antennas.

[0157] Aspect 4. The apparatus according to any one of aspects 1-3, wherein: the transceiver is further configured to receive a command to switch from the first BWP; and the indication includes a command to switch from the first BWP.

[0158] Aspect 5. An apparatus according to any one of Aspects 1-4, wherein: the transceiver is further configured to detect a trigger in a physical (PHY) layer, wherein the trigger is sent by at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack in the transceiver in a base station (BS); and the indication includes the trigger.

[0159] Aspect 6. The apparatus according to any one of aspects 1-5, wherein: the processor and the memory are further configured to detect expiration of a periodic timer for switching to the second BWP; and the indication includes expiration of the periodic timer.

[0160] Aspect 7. An apparatus according to any one of Aspects 1-6, wherein: the transceiver is further configured to send at least one of a buffer status report (BSR) or a scheduling request (SR); and the indication includes at least one of the BSR or the SR.

[0161] Aspect 8. An apparatus according to any one of aspects 1-7, wherein: the transceiver is further configured to receive an uplink (UL) grant; and the indication includes a UL grant.

[0162] Aspect 9. An apparatus according to any one of Aspects 1-7, wherein: the transceiver is further configured to: receive a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher service rate of I frames, and receive another indication that P frames are to be sent to the apparatus; and the processor and memory are further configured to determine to switch to the second BWP based on the other indication.

[0163] Aspect 10. An apparatus for wireless communication, comprising: a transceiver configured to send a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; a memory; a processor coupled to the memory, the processor and the memory configured to obtain an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and wherein the transceiver is further configured to switch from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0164] Aspect 11. An apparatus according to Aspect 10, wherein the first configuration includes a first minimum control channel to data channel delay for a first BWP, wherein the second configuration includes a second minimum control channel to data channel delay for a second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

[0165] Aspect 12. An apparatus according to any one of Aspects 10 or 11, wherein: the first configuration includes at least one of a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, a first bandwidth of the first BWP, or support for a first number of receive antennas for the first BWP; and the second configuration includes at least one of a second period for monitoring PDCCH on a second BWP, a second bandwidth of the second BWP, or support for a second number of receive antennas for the second BWP; the second period is smaller than the first period; the second bandwidth is larger than the first bandwidth; and the second number of receive antennas is larger than the first number of receive antennas.

[0166] Aspect 13. An apparatus according to any one of aspects 10-12, wherein: the transceiver is further configured to obtain traffic for the UE on a physical layer of the protocol stack; and the indication includes arrival of traffic for the UE on the physical layer.

[0167] Aspect 14. An apparatus according to any one of Aspects 10-13, wherein: the transceiver is further configured to send a trigger to the UE on a media access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack based on another indication of a burst of prepared services; and the indication includes sending the trigger to the UE.

[0168] Aspect 15. The apparatus according to any one of aspects 10-14, wherein: the processor and the memory are configured to detect expiration of a periodic timer for switching to the second BWP; and the indication includes expiration of the periodic timer for switching to the second BWP.

[0169] Aspect 16. An apparatus according to any one of aspects 10-15, wherein: the transceiver is further configured to receive at least one of a buffer status report (BSR) or a scheduling request (SR) from the UE; and the indication includes at least one of the BSR or the SR.

[0170] Aspect 17. An apparatus according to any one of aspects 10-16, wherein: the transceiver is further configured to send an uplink (UL) grant to the UE; and the indication includes the UL grant.

[0171] Aspect 18. An apparatus according to any one of Aspects 10-17, wherein: the transmitter is further configured to send a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher service rate of I frames; the processor and memory are further configured to: obtain another indication that the P frame is to be sent to the UE, and determine to switch to the second BWP based on the other indication.

[0172] Aspect 19. A method for wireless communication by a user equipment (UE), comprising: receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; obtaining an indication to switch from the first BWP to the second BWP; and switching from the first BWP to the second BWP in response to obtaining the indication.

[0173] Aspect 20. A method according to Aspect 19, wherein the first configuration includes a first minimum control channel to data channel delay for a first BWP, wherein the second configuration includes a second minimum control channel to data channel delay for a second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

[0174] Aspect 21. A method according to any one of Aspects 19-20, wherein the first configuration includes a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, wherein the second configuration includes a second period for monitoring the PDCCH on a second BWP, and wherein the second period is smaller than the first period.

[0175] Aspect 22. The method according to any of aspects 19-21, wherein the first configuration comprises a first bandwidth of the first BWP, wherein the second configuration comprises a second bandwidth of the second BWP, and wherein the second bandwidth is greater than the first bandwidth.

[0176] Aspect 23. The method according to any one of aspects 19-22, wherein the first configuration supports a first number of receive antennas for a first BWP, wherein the second configuration supports a second number of receive antennas for a second BWP, and wherein the second number of receive antennas is greater than the first number of receive antennas.

[0177] Aspect 24. The method according to any one of aspects 19-23, wherein the indication comprises a command received by the UE to switch from the first BWP.

[0178] Aspect 25. A method according to any one of Aspects 19-24, wherein the indication includes a trigger detected in a physical (PHY) layer of a transceiver in a UE, wherein the trigger is sent by at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack of the transceiver in a base station (BS).

[0179] Aspect 26. The method according to any one of aspects 19-25, wherein the indication comprises expiration of a periodic timer for switching to the second BWP.

[0180] Aspect 27. The method according to any one of aspects 19-26, wherein the indication comprises at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE.

[0181] Aspect 28. The method according to any one of aspects 19-27, wherein the indication comprises an uplink (UL) grant received by the UE.

[0182] Aspect 29. The method according to any one of Aspects 19-28 further includes: receiving a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher traffic rate of I frames; receiving another indication that P frames are to be sent to the UE; and determining to switch to the second BWP based on the other indication.

[0183] Aspect 30. A method for wireless communication by a base station (BS), comprising: sending a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; obtaining an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0184] Aspect 31. A method according to Aspect 30, wherein the first configuration includes a first minimum control channel to data channel delay for a first BWP, wherein the second configuration includes a second minimum control channel to data channel delay for a second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

[0185] Aspect 32. A method according to any one of Aspects 30 or 31, wherein the first configuration includes a first period for monitoring a physical downlink control channel (PDCCH) on a first BWP, wherein the second configuration includes a second period for monitoring the PDCCH on a second BWP, and wherein the second period is smaller than the first period.

[0186] Aspect 33. The method according to any of aspects 30-32, wherein the first configuration comprises a first bandwidth of the first BWP, wherein the second configuration comprises a second bandwidth of the second BWP, and wherein the second bandwidth is greater than the first bandwidth.

[0187] Aspect 34. The method according to any one of aspects 30-33, wherein the first configuration supports a first number of receive antennas for a first BWP, wherein the second configuration supports a second number of receive antennas for a second BWP, and wherein the second number of receive antennas is greater than the first number of receive antennas.

[0188] Aspect 35. The method according to any one of aspects 30-34, wherein the indication comprises arrival of traffic for the UE on a physical layer of a protocol stack in a transceiver in the BS.

[0189] Aspect 36. A method according to any one of Aspects 30-35, wherein the indication includes at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack in a transceiver in a BS sending a trigger to the UE, wherein the trigger is sent based on another indication of preparing a burst of service.

[0190] Aspect 37. The method according to any one of aspects 30-36, wherein the indication comprises expiration of a periodic timer for switching to the second BWP.

[0191] Aspect 38. The method according to any one of aspects 30-37, wherein the indication comprises at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE.

[0192] Aspect 39. The method according to any one of aspects 30-38, wherein the indication comprises an uplink (UL) grant sent by the BS to the UE.

[0193] Aspect 40. The method according to any one of Aspects 30-39 further includes: sending a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for a higher traffic rate of I frames; obtaining another indication that the P frames are to be sent to the UE; and determining to switch to the second BWP based on the further indication.

[0194] Aspect 41. An apparatus for wireless communication, comprising: a component for receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; a component for obtaining an indication to switch from the first BWP to the second BWP; and a component for switching from the first BWP to the second BWP in response to obtaining the indication.

[0195] Aspect 42. The apparatus according to Aspect 41, comprising components for performing any one of Aspects 19 to 29.

[0196] Aspect 43. An apparatus for wireless communication, comprising: a component for sending a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower service rate and the second BWP is configured for a higher service rate; a component for obtaining an indication for the UE to switch from the first BWP to the second BWP for transmission to the UE; and a component for switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0197] Aspect 44. The apparatus according to aspect 43, comprising means for performing any one of aspects 30 to 40.

[0198] Aspect 45. A computer-readable medium having instructions stored thereon, the instructions being for: receiving a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication to switch from the first BWP to the second BWP; and switching from the first BWP to the second BWP in response to obtaining the indication.

[0199] Aspect 46. The computer-readable medium according to aspect 45, the computer-readable medium having stored thereon instructions for performing any one of aspects 19 to 29.

[0200] Aspect 47. A computer-readable medium having instructions stored thereon, the instructions being for: sending a first configuration of a first bandwidth part (BWP) and a second configuration of a second BWP to a user equipment (UE), wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication to cause the UE to switch from the first BWP to the second BWP for transmission to the UE; and switching from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

[0201] Aspect 48. The computer readable medium according to aspect 47, the computer readable medium having stored thereon instructions for performing any one of aspects 30 to 40.

[0202] Aspect 49. The apparatus according to any one of aspects 1-9, wherein the first BWP is configured for at least one of a first service or lower power consumption, and the second BWP is configured for at least one of a second service or higher power consumption.

[0203] Aspect 50. The apparatus according to any one of aspects 10-18, wherein the first BWP is configured for at least one of a first service or lower power consumption, and the second BWP is configured for at least one of a second service or higher power consumption.

[0204] Additional considerations

[0205] The method disclosed herein includes one or more steps or actions to implement the method. These method steps and / or actions can be interchangeable with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions has been specified, the order and / or use of specific steps and / or actions can be modified without departing from the scope of the claims.

[0206] 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. As an example, "at least one of a, b, or c" is meant to cover a, b, c, ab, ac, bc, and abc, as well as any combination with multiple identical elements (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc or any other arrangement of a, b, and c).

[0207] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" may include calculating, computing, processing, obtaining, investigating, searching (e.g., searching in a table, a database, or another data structure), ascertaining, and the like. Furthermore, "determine" may include receiving (e.g., receiving information), accessing (e.g., accessing data in a memory), and the like. Furthermore, "determine" may include deciding, selecting, choosing, establishing, and the like.

[0208] To enable those skilled in the art to implement the various aspects described herein, the previous description is provided. For those skilled in the art, various modifications to these aspects will be apparent, and the general principles defined herein can be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but are consistent with the broadest scope of the claim language, wherein, unless otherwise specified, the singular form of the element is not intended to mean "one and only one", but "one or more". Unless otherwise specifically stated, the term "some" refers to one or more. All structural and functional equivalents of the elements of the various aspects described throughout the present disclosure that are known or will be known to those skilled in the art are expressly incorporated herein as a reference and are intended to be included in the claims. In addition, whether or not this expression is explicitly stated in the claims, the content disclosed herein is not intended to be dedicated to the public. Any claim element should not be interpreted according to the provisions of Section 112 (f) of Volume 35 of the United States Code, unless the element is explicitly recorded using "a component for...", or in the case of a method claim, the element is recorded using the phrase "a step for...".

[0209] Each operation of the above method can be performed by any suitable component capable of performing the corresponding function. The component may include (a plurality of) various hardware and / or software components and / or modules, including but not limited to circuits, application specific integrated circuits (ASICs) or processors. Typically, where operations are shown in the figures, those operations may have corresponding equivalent similarly numbered components plus functional components.

[0210] The various illustrative logic blocks, modules and circuits described in conjunction with the present disclosure may be implemented or executed 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 an alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as, 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 a combination of any other such configured computing devices.

[0211] 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 together various circuits including a processor, a machine-readable medium, and a bus interface. In addition, the bus interface may be used to connect a network adapter to the processing system via the bus. The network adapter may be used to implement the signal processing functions of the PHY layer. In the user terminal 120 (see Figure 1 ), a user interface (e.g., keyboard, 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 will not be described further. The processor may be implemented with 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 described functionality of the processing system depending on the specific application and the overall design constraints imposed on the entire system.

[0212] If implemented in software, the function can be stored on a computer-readable medium or transmitted through a computer-readable medium as one or more instructions or codes. Whether it is called software, firmware, middleware, microcode, hardware description language or other, software should be broadly understood to represent instructions, data, or any combination thereof. Computer-readable media include computer storage media and communication media, including any medium that supports the transmission of computer programs from one place to another. The processor can 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 can be coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. In an alternative, the storage medium can be a component of the processor. For example, the machine-readable medium can include a transmission line, a carrier modulated by data, and / or a computer-readable storage medium separated from a wireless node with instructions stored thereon, all of which can be accessed by the processor through a bus interface. Alternatively or additionally, such as in the case of utilizing a cache and / or a general register file, the machine-readable medium or any part thereof can be integrated into the processor. Examples of machine-readable storage media may include, for example, 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. Machine-readable media may be implemented in a computer program product.

[0213] A software module may include a single instruction or many instructions, and may be distributed over several different code segments, in different programs, and over multiple storage media. A computer-readable medium may include multiple software modules. A software module includes instructions that cause a processing system to perform various functions when executed by a device such as a processor. A software module may include a sending module and a receiving module. Each software module may reside in a single storage device or may be distributed in multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into a RAM. During the execution of a software module, a processor may load some instructions into a cache to increase access speed. One or more cache lines are then loaded into a general register file for execution by the processor. When the functions of a software module are mentioned below, it should be understood that such functions are implemented when the processor executes instructions from that software module.

[0214] Any connection is also properly referred to as 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 such as infrared (IR), radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium. Disk and disc, as used herein, include laser discs (CDs), laser discs, compact discs, digital versatile discs (DVDs), floppy disks, and Blu-ray discs. Disks, where disks typically reproduce data magnetically, and discs use lasers to reproduce data optically. Thus, in some aspects, computer-readable media may include non-transitory computer-readable media (e.g., tangible media). Additionally, 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.

[0215] 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, and one or more processors may execute the instructions to perform the operations described herein. For example, instructions for performing the operations described herein.

[0216] In addition, it should be understood that the modules and / or other appropriate components for performing the methods and techniques described herein may be downloaded and / or otherwise obtained by a user terminal and / or a base station as appropriate. For example, such a device may be coupled to a server to support the transmission of components for performing the methods described herein. Alternatively, the methods described herein may be provided via a storage component (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 the base station may obtain the methods after the storage component is coupled or provided to the device. In addition, any other suitable technology for providing the methods and techniques described herein to a device may be utilized.

[0217] 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 to the arrangement, operation and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. A device for wireless communication, comprising: a transceiver configured to receive a first configuration of a first bandwidth portion BWP and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; Memory; as well as a processor coupled to the memory, the processor and the memory configured to obtain an indication of switching from the first BWP to the second BWP, the indication comprising expiration of a periodic timer for switching to the second BWP; and The transceiver is further configured to switch from the first BWP to the second BWP in response to obtaining the indication.

2. The apparatus of claim 1 , wherein the first configuration comprises a first minimum control channel to data channel delay for the first BWP, wherein the second configuration comprises a second minimum control channel to data channel delay for the second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

3. The device according to claim 1, wherein: The first configuration includes at least one of a first period for monitoring a physical downlink control channel (PDCCH) on the first BWP, a first bandwidth of the first BWP, or support for a first number of receive antennas for the first BWP; The second configuration includes a second period for monitoring the PDCCH on the second BWP, a second bandwidth of the second BWP, or support for a second number of receive antennas for the second BWP; The second period is shorter than the first period; The second bandwidth is greater than the first bandwidth; as well as The number of the second receiving antennas is greater than the number of the first receiving antennas. 4 . The apparatus of claim 1 , wherein the first BWP is configured for at least one of a first service or lower power consumption, and the second BWP is configured for at least one of a second service or higher power consumption.

5. The device according to claim 1, wherein: The transceiver is further configured to receive a command to switch from the first BWP; and The indication also includes the command to switch from the first BWP.

6. The device according to claim 1, wherein: The transceiver is further configured to detect a trigger in a physical (PHY) layer, wherein the trigger is sent by at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack in the transceiver in the base station; and The indication also includes the trigger.

7. The device according to claim 1, wherein: The transceiver is further configured to receive an uplink UL grant; and The indication also includes the UL Grant.

8. The device according to claim 1, wherein: The transceiver is further configured as: receiving a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for the higher traffic rate of I frames, and receiving another indication that a P frame is to be sent to the device; and The processor and the memory are further configured to determine to switch to the second BWP based on the other indication.

9. The device according to claim 1, wherein: The transceiver is further configured to send at least one of a buffer status report BSR or a scheduling request SR; and The indication also includes at least one of the BSR or the SR.

10. An apparatus for wireless communication, comprising: a transceiver configured to send a first configuration of a first bandwidth part BWP and a second configuration of a second BWP to a user equipment UE, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; Memory; a processor, coupled to the memory, the processor and the memory configured to obtain an indication for switching the UE from the first BWP to the second BWP for transmission to the UE, the indication comprising expiration of a periodic timer for switching to the second BWP; as well as The transceiver is further configured to switch from the first BWP to the second BWP for transmission to the UE in response to obtaining the indication.

11. The apparatus of claim 10, wherein the first configuration comprises a first minimum control channel to data channel delay for the first BWP, wherein the second configuration comprises a second minimum control channel to data channel delay for the second BWP, and wherein the second minimum control channel to data channel delay is less than the first minimum control channel to data channel delay.

12. The device according to claim 10, wherein: The first configuration includes at least one of a first period for monitoring a physical downlink control channel (PDCCH) on the first BWP, a first bandwidth of the first BWP, or support for a first number of receive antennas for the first BWP; as well as The second configuration includes at least one of a second period for monitoring the PDCCH on the second BWP, a second bandwidth of the second BWP, or support for a second number of receive antennas for the second BWP; The second period is shorter than the first period; The second bandwidth is greater than the first bandwidth; as well as The number of the second receiving antennas is greater than the number of the first receiving antennas. 13 . The apparatus of claim 10 , wherein the first BWP is configured for at least one of a first service or lower power consumption, and the second BWP is configured for at least one of a second service or higher power consumption.

14. The device according to claim 10, wherein: The transceiver is further configured to obtain a service for the UE on a physical layer of a protocol stack; and The indication also includes the traffic for the UE arriving on the physical layer.

15. The device according to claim 10, wherein: The indication further comprises at least one of a media access control MAC layer, a radio link control RLC layer, or a packet data convergence protocol PDCP layer of a protocol stack in the transceiver sending a trigger to the UE, wherein the trigger is sent based on another indication of preparing a burst of traffic.

16. The apparatus of claim 10, wherein: The transceiver is further configured to send an uplink UL grant to the UE; and The indication also includes the UL Grant.

17. The apparatus of claim 10, wherein: The transceiver is further configured to transmit a third configuration of a third BWP, wherein the second BWP is configured for P frames and the third BWP is configured for the higher traffic rate of I frames; The processor and the memory are further configured to: obtaining another indication that a P frame is to be sent to the UE, and The determination to switch to the second BWP is based on the other indication.

18. The apparatus of claim 10, wherein: The transceiver is further configured to receive at least one of a buffer status report BSR or a scheduling request SR from the UE; and The indication also includes at least one of the BSR or the SR.

19. A method for wireless communication by a user equipment UE, comprising: receiving a first configuration of a first bandwidth portion BWP and a second configuration of a second BWP, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; obtaining an indication of switching from the first BWP to the second BWP, wherein the indication comprises expiration of a periodic timer for switching to the second BWP; as well as In response to obtaining the indication, switching is performed from the first BWP to the second BWP.

20. The method of claim 19, wherein the indication further comprises a command received by the UE to switch from the first BWP.

21. The method of claim 19, wherein the indication further comprises a trigger detected in a physical (PHY) layer of the transceiver in the UE, wherein the trigger is sent by at least one of a medium access control (MAC) layer, a radio link control (RLC) layer, or a packet data convergence protocol (PDCP) layer of a protocol stack in the transceiver in the base station.

22. The method of claim 19, wherein the indication further comprises an uplink (UL) grant received by the UE.

23. The method of claim 19, wherein the indication further comprises at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE.

24. A method for wireless communication by a base station, comprising: Sending a first configuration of a first bandwidth part BWP and a second configuration of a second BWP to a user equipment UE, wherein the first BWP is configured for a lower traffic rate and the second BWP is configured for a higher traffic rate; Obtaining an indication for sending to the UE to switch the UE from the first BWP to the second BWP, wherein the indication comprises expiration of a periodic timer for switching to the second BWP; as well as In response to obtaining the indication, switching from the first BWP to the second BWP for transmission to the UE.

25. The method of claim 24, wherein the indication further comprises traffic for the UE arriving on a physical layer of a protocol stack in a transceiver in the base station.

26. The method of claim 24, wherein the indication further comprises at least one of a media access control MAC layer, a radio link control RLC layer, or a packet data convergence protocol PDCP layer of a protocol stack in a transceiver in the base station sending a trigger to the UE, wherein the trigger is sent based on another indication of preparing a burst of service.

27. The method of claim 24, wherein the indication further comprises an uplink (UL) grant sent by the base station to the UE.

28. The method of claim 24, wherein the indication comprises at least one of a buffer status report (BSR) or a scheduling request (SR) generated by the UE.

29. A computer readable medium storing instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 19 to 23.

30. A computer readable medium storing instructions which, when executed by a computer, cause the computer to perform the method according to any one of claims 24 to 28.

Images