Default resource bandwidth and inactivity timers

Abstract

Various aspects of the present disclosure generally relate to wireless communications. In some aspects, a user equipment may communicate using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a bandwidth part (BWP); and switching to a default resource bandwidth as the active bandwidth based at least in part on the expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP. Numerous other aspects are provided.

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This patent application claims priority to Greek Patent Application No. 20200100279, entitled “DEFAULT RESOURCE BANDWIDTHAND INACTIVITY TIMER”, filed on May 25, 2020 and assigned to the assignee of this application. The disclosure of the prior application is considered part of this patent application and is incorporated into this patent application by reference.

[0003] Public domain

[0004] Aspects of the present disclosure relate generally to wireless communications and to techniques and apparatus for default resource bandwidth and inactivity timers.

[0005] background

[0006] Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasting. Typical wireless communication systems may employ multiple access technologies that can support communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency division multiple access (FDMA) systems, orthogonal frequency division multiple access (OFDMA) systems, single carrier frequency division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and long term evolution (LTE). LTE / LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP).

[0007] A wireless network may include several base stations (BSs) that can support communication of several user equipments (UEs). User equipments (UEs) may communicate with base stations (BSs) via downlinks and uplinks. Downlinks (or forward links) refer to the communication link from a BS to a UE, while uplinks (or reverse links) refer to the communication link from a UE to a BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, access point (AP), radio head, transmit receive point (TRP), new radio (NR) BS, 5G Node B, and the like.

[0008] The above multiple access technologies have been adopted in various telecommunication standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global level. New Radio (NR) (which may also be referred to as 5G) is an enhancement set to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP). NR is designed to better support mobile broadband Internet access by using orthogonal frequency division multiplexing (OFDM) (CP-OFDM) with cyclic prefix (CP) on the downlink (DL), using CP-OFDM and / or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)) on the uplink (UL), and supporting beamforming, multiple input multiple output (MIMO) antenna technology and carrier aggregation to improve spectrum efficiency, reduce costs, improve services, utilize new spectrum, and better integrate with other open standards. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR and other radio access technologies are still useful.

[0009] Overview

[0010] In some aspects, a wireless communication method performed by a user equipment (UE) may include communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a bandwidth part (BWP); and switching to a default resource bandwidth as the active bandwidth based at least in part on the expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP.

[0011] In some aspects, a UE for wireless communication may include a memory and one or more processors operatively coupled to the memory. The memory and the one or more processors may be configured to communicate using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a BWP; and switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP.

[0012] In some aspects, a non-transitory computer-readable medium may store one or more instructions for wireless communication. The one or more instructions, when executed by one or more processors of a UE, may cause the one or more processors to: communicate using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a BWP; and switch to a default resource bandwidth as an active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP.

[0013] In some aspects, an apparatus for wireless communications may include means for communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a BWP; and means for switching to a default resource bandwidth as an active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP.

[0014] Aspects generally include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication devices, and / or processing systems as substantially described herein with reference to and as illustrated in the accompanying figures and specification.

[0015] The foregoing has broadly outlined the features and technical advantages of examples according to the present disclosure in an effort to make the following detailed description better understood. Additional features and advantages will be described hereinafter. The disclosed concepts and specific examples can be easily used as a basis for modifying or designing other structures for implementing the same purpose as the present disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein, both in terms of their organization and method of operation, and the associated advantages will be better understood by considering the following description in conjunction with the accompanying drawings. Each of the accompanying drawings is provided for the purpose of illustration and description and is not intended to define limitations on the claims. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to understand the above-stated features of the present disclosure in detail, the above briefly summarized content may be described in more detail with reference to various aspects, some of which are illustrated in the accompanying drawings. However, it should be noted that the accompanying drawings only illustrate certain typical aspects of the present disclosure and should not be considered to limit its scope, as the description may allow for other equally effective aspects. The same reference numerals in different drawings may identify the same or similar elements.

[0018] Figure 1 is a diagram illustrating an example of a wireless network in accordance with various aspects of the present disclosure.

[0019] Figure 2 is a diagram illustrating an example of a base station and a UE in communication in a wireless network according to various aspects of the present disclosure.

[0020] Figures 3A-3C is a diagram illustrating an example of full-duplex communication according to various aspects of the present disclosure.

[0021] Figure 4 is a diagram illustrating an example of frequency resource allocation for full-duplex communication according to various aspects of the present disclosure.

[0022] Figure 5is a diagram illustrating an example of using default resource bandwidth and inactivity timer according to various aspects of the present disclosure.

[0023] Figure 6 is a diagram illustrating an example of using multiple default resource bandwidths and inactivity timers in accordance with various aspects of the present disclosure.

[0024] Figure 7 is a diagram illustrating example processes associated with using default resource bandwidth and inactivity timers in accordance with various aspects of the present disclosure.

[0025] Figure 8 is a block diagram of an example device for wireless communications in accordance with various aspects of the present disclosure.

[0026] Detailed Description

[0027] The various aspects of the present disclosure are described more fully below with reference to the accompanying drawings. However, the present disclosure can be implemented in many different forms and should not be interpreted as being limited to any specific structure or function given throughout the present disclosure. On the contrary, these aspects are provided to make the present disclosure thorough and complete, and it will fully convey the scope of the present disclosure to those skilled in the art. Based on the teachings of this article, those skilled in the art will appreciate that the scope of the present disclosure is intended to cover any aspect of the present disclosure disclosed herein, whether it is independently implemented or implemented in combination with any other aspect of the present disclosure. For example, any number of aspects set forth herein can be used to implement a device or practice method. In addition, the scope of the present disclosure is intended to cover such devices or methods practiced using supplements or other other structures, functionality, or structures and functionality as the various aspects of the present disclosure set forth herein. It should be understood that any aspect of the present disclosure disclosed herein can be implemented by one or more elements of the claims.

[0028] Several aspects of telecommunication systems will now be presented with reference to various devices and techniques. These devices and techniques will be described in the following detailed description and illustrated in the accompanying drawings by various blocks, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using hardware, software, or a combination thereof. Whether such elements are implemented as hardware or software depends on the specific application and the design constraints imposed on the overall system.

[0029] It should be noted that although various aspects may be described herein using terminology associated with 5G or NR radio access technology (RAT), various aspects of the present disclosure may be applied to other RATs, such as 3G RAT, 4G RAT, and / or RATs after 5G (e.g., 6G).

[0030] Figure 11 is a diagram illustrating an example of a wireless network 100 according to various aspects of the present disclosure. The wireless network 100 may be a 5G (NR) network, an LTE network, etc. or may include elements thereof. The wireless network 100 may include several base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, a B node, a gNB, a 5G B node (NB), an access point, a transmit receive point (TRP), etc. Each BS may provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to a coverage area of ​​a BS and / or a BS subsystem serving the coverage area, depending on the context in which the term is used.

[0031] A BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and / or another type of cell. A macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscriptions. A pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscriptions. A femto cell may cover a relatively small geographic area (e.g., a residence) and may allow restricted access by UEs associated with the femto cell (e.g., UEs in a closed subscriber group (CSG)). 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 , BS 110a may be a macro BS for macro cell 102a, BS 110b may be a pico BS for pico cell 102b, and BS 110c may be a femto BS for femto cell 102c. A BS may support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” may be used interchangeably herein.

[0032] In some aspects, the cells may not necessarily be stationary, and the geographic area of ​​the cells may move depending on the location of the mobile BS. In some aspects, the BSs may be interconnected to each other and / or to one or more other BSs or network nodes (not shown) in the wireless network 100 via various types of backhaul interfaces (such as direct physical connections, virtual networks, etc.) using any suitable transport network.

[0033] The wireless network 100 may also include a relay station. A relay station is an entity that can receive transmissions of data from an upstream station (e.g., a BS or a UE) and send transmissions of the data to a downstream station (e.g., a UE or a BS). A relay station may also be a UE that can relay transmissions for other UEs. Figure 1 In the example shown in , a relay station 110d may communicate with a macro BS 110a and a UE 120d to facilitate communication between the BS 110a and the UE 120d. A relay station may also be referred to as a relay BS, a relay base station, a relay, or the like.

[0034] The wireless network 100 may be a heterogeneous network including different types of BSs (e.g., macro BSs, pico BSs, femto BSs, relay BSs, etc.). These different types of BSs may have different transmit power levels, different coverage areas, and different effects on interference in the wireless network 100. For example, a macro BS may have a high transmit power level (e.g., 5 to 40 watts), while a pico BS, a femto BS, and a relay BS may have a lower transmit power level (e.g., 0.1 to 2 watts).

[0035] A network controller 130 may be coupled to a set of BSs and may provide coordination and control of these BSs. The network controller 130 may communicate with each BS via a backhaul. The BSs may also communicate with each other directly or indirectly via a wireless or wired backhaul.

[0036] UEs 120 (e.g., 120a, 120b, 120c) may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile. UEs may also be referred to as access terminals, terminals, mobile stations, subscriber units, stations, etc. A UE may be a cellular phone (e.g., a smart phone), a personal digital assistant (PDA), a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, a biometric sensor / device, a wearable device (smart watch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet)), an entertainment device (e.g., a music or video device, or a satellite radio), a vehicle component or sensor, a smart meter / sensor, an industrial manufacturing equipment, a global positioning system device, or any other suitable device configured to communicate via a wireless or wired medium.

[0037] Some UEs may be considered as machine type communication (MTC) UEs, or evolved or enhanced machine type communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which may communicate with a base station, another device (e.g., a remote device), or some other entity. A wireless node may provide connectivity to or to a network (e.g., a wide area network (such as the Internet) or a cellular network) via, for example, a wired or wireless communication link. Some UEs may be considered as Internet of Things (IoT) devices, and / or may be implemented as NB-IoT (narrowband Internet of Things) devices. Some UEs may be considered as client equipment (CPE). UE 120 may be included inside a housing that houses components of UE 120, such as a processor component, a memory component, etc. In some aspects, a processor component and a memory component may be coupled together. For example, a processor component (e.g., one or more processors) and a memory component (e.g., a memory) may be operationally coupled, communicatively coupled, electronically coupled, electrically coupled, etc.

[0038] In general, any number of wireless networks may be deployed in a given geographic area. Each wireless network may support a specific RAT and may operate on one or more frequencies. RAT may also be referred to as radio technology, air interface, etc. Frequency may also be referred to as carrier, frequency channel, etc. Each frequency may support a single RAT in a given geographic area to avoid interference between wireless networks of different RATs. In some cases, NR or 5G RAT networks may be deployed.

[0039] In some aspects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly (e.g., without using base station 110 as an intermediary to communicate with each other) using one or more sidelink channels. For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols, vehicle-to-infrastructure (V2I) protocols, etc.), mesh networks, etc. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described elsewhere herein as being performed by base station 110.

[0040] As indicated above, Figure 1 are provided as examples. Other examples may differ from those described herein. Figure 1 Examples described.

[0041] Figure 2is a diagram illustrating an example 200 of a base station 110 and a UE 120 in communication in a wireless network 100 in accordance with various aspects of the present disclosure. The base station 110 may be equipped with T antennas 234a through 234t and the UE 120 may be equipped with R antennas 252a through 252r, where in general T≥1 and R≥1.

[0042] At the base station 110, the transmit processor 220 may receive data for one or more UEs from the data source 212, select one or more modulation and coding schemes (MCS) for each UE based at least in part on a channel quality indicator (CQI) received from the UE, process (e.g., encode and modulate) the data for the UE based at least in part on the MCS selected for each UE, and provide data symbols for all UEs. The transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI), etc.) and control information (e.g., CQI requests, grants, upper layer signaling, etc.), and provide overhead symbols and control symbols. The transmit processor 220 may also generate reference symbols for reference signals (e.g., cell-specific reference signals (CRS)), demodulation reference signals (DMRS), etc.) and synchronization signals (e.g., primary synchronization signals (PSS) and secondary synchronization signals (SSS)). The transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on ​​data symbols, control symbols, overhead symbols, and / or reference symbols, where applicable, and may provide T output symbol streams to T modulators (MOD) 232a to 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc.) to obtain an output sample stream. Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The T downlink signals from modulators 232a to 232t may be transmitted via T antennas 234a to 234t, respectively. According to various aspects described in more detail below, position coding may be used to generate synchronization signals to convey additional information.

[0043] At UE 120, antennas 252a to 252r may receive downlink signals from base station 110 and / or other base stations and may provide received signals to demodulators (DEMODs) 254a to 254r, respectively. Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) the received signal to obtain input samples. Each demodulator 254 may further process the input samples (e.g., for OFDM, etc.) to obtain received symbols. A MIMO detector 256 may obtain received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols where applicable, and provide detected symbols. A receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller / processor 280. The channel processor may determine reference signal received power (RSRP), received signal strength indicator (RSSI), reference signal received quality (RSRQ), channel quality indicator (CQI), etc. In some aspects, one or more components of UE 120 may be included in housing 284.

[0044] The network controller 130 may include a communication unit 294, a controller / processor 290, and a memory 292. The network controller 130 may include, for example, one or more devices in a core network. The network controller 130 may communicate with the base station 110 via the communication unit 294.

[0045] On the uplink, at the UE 120, a transmit processor 264 may receive and process data from a data source 262 and control information from a controller / processor 280 (e.g., for reports including RSRP, RSSI, RSRQ, CQI, etc.). The transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266, where applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, etc.), and transmitted to the base station 110. In some aspects, the UE 120 includes a transceiver. The transceiver may include any combination of antenna(s) 252, modulators and / or demodulators 254, a MIMO detector 256, a receive processor 258, a transmit processor 264, and / or a TX MIMO processor 266. The transceiver may be used by a processor (eg, controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 5-7 as described.

[0046] At the base station 110, uplink signals from the UE 120 and other UEs may be received by the antenna 234, processed by the demodulator 232, detected by the MIMO detector 236 where applicable, and further processed by the receive processor 238 to obtain decoded data and control information transmitted by the UE 120. The receive processor 238 may provide the decoded data to the data sink 239 and the decoded control information to the controller / processor 240. The base station 110 may include a communication unit 244 and communicate with the network controller 130 via the communication unit 244. The base station 110 may include a scheduler 246 to schedule the UE 120 for downlink and / or uplink communications. In some aspects, the base station 110 includes a transceiver. The transceiver may include any combination of antenna(s) 234, modulator and / or demodulator 232, MIMO detector 236, receive processor 238, transmit processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (eg, controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as described with reference to Figure 5-7 as described.

[0047] The controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the may perform one or more techniques associated with using the default resource bandwidth and inactivity timer, as described in more detail elsewhere herein. For example, the controller / processor 240 of the base station 110, the controller / processor 280 of the UE 120, and / or Figure 2 Any other component of the Figure 7 The operations of process 700 and / or other processes as described herein. Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions for wireless communication. For example, the one or more instructions, when executed (e.g., directly, or after compilation, conversion, interpretation, etc.) by one or more processors of base station 110 and / or UE 120, may perform or direct, for example, Figure 7 The process 700 of and / or operations of other processes as described herein. In some aspects, executing instructions may include running instructions, converting instructions, compiling instructions, interpreting instructions, etc.

[0048] In some aspects, UE 120 may include means for communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a bandwidth part (BWP), means for switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP, and the like. In some aspects, such means may include in conjunction with Figure 2 One or more components of UE 120 are depicted, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and the like.

[0049] As indicated above, Figure 2 are provided as examples. Other examples may differ from those described herein. Figure 2 Examples described.

[0050] Figures 3A-3C are diagrams illustrating examples 300 , 310 , 320 of full-duplex (FD) communications. Figure 3A The example 300 includes UE1 302 and two base stations (eg, TRPs) 304-1, 304-2, where UE1 302 is sending an uplink (UL) transmission to base station 304-1 and receiving a downlink (DL) transmission from base station 304-2. Figure 3A In example 300, FD is enabled for UE1 302, but not for base stations 304-1, 304-2. Figure 3B The example 310 includes two UEs, UE1 302-1 and UE2 302-2, and a base station 304, where UE1 302-1 is receiving a DL transmission from the base station 304 and UE2 302-2 is transmitting a UL transmission to the base station 304. Figure 3B In example 310, FD is enabled for the base station 304, but not for the UEs, namely UE1 302-1 and UE2 302-2. Figure 3C Example 320 includes UE1 302 and base station 304, where UE1 302 is receiving a DL transmission from base station 304 and UE1 302 is transmitting a UL transmission to base station 304. Figure 3C In example 320 , FD is enabled for both UE1 302 and base station 304 .

[0051] FD communication may include in-band full-duplex (IBFD) communication, in which devices may transmit and receive on at least some of the same time and frequency resources. In IBFD, UL and DL resources may partially overlap or completely overlap. FD communication may include sub-band frequency division duplex (FDD) (which may be referred to as "flexible duplex"). In flexible duplex, the device may use the same time resources but different frequency resources for transmission and reception. The DL frequency resources may be separated from the UL frequency resources by a guard band. The guard band is typically small, spanning a small number of resource blocks, and thereby allows some self-interference between the UL and DL signals.

[0052] FD communication may be conditioned on beam separation of UL beams and DL beams at respective antenna panels. Utilizing FD communication may provide a reduction in latency so that it is possible to receive DL signals in UL-only time slots, which may enable a reduction in latency. In addition, FD communication may enhance spectral efficiency per cell or per UE and may allow for more efficient use of resources. Beam separation of UL and DL beams helps to limit or reduce self-interference that may occur during FD communication. Selecting UL and DL beams on different antenna panels may minimize self-interference. Determining the UL and DL beams separated on their respective antenna panels may provide reliable FD communication by facilitating the selection of beam pairs that minimize or reduce self-interference.

[0053] As indicated above, Figures 3A-3C are provided as one or more examples. Other examples may differ from those regarding Figures 3A-3C Examples described.

[0054] Figure 4 is a diagram illustrating an example 400 of frequency resource allocation for full-duplex communication in accordance with various aspects of the present disclosure. As shown, a device may include a first panel (shown as Panel 1) and a second panel (shown as Panel 2). Figure 4 The panels illustrated in are associated with a base station, but similar concepts apply to panels associated with a UE.

[0055] Panel 1 may be used for DL ​​transmissions (shown as "Tx") at both edges of the frequency band. Panel 2 may be used for UL transmissions (shown as "Rx") in the middle of the frequency band. As shown by reference numeral 410, the two panels may be used for DL ​​Tx during the first time slot. As shown by reference numeral 420, during the second and third time slots, panel 1 may be used for DL ​​Tx and panel 2 may be used for UL Rx. Sub-band full duplex may be used so that DL Tx is in a different portion of the frequency band than UL Rx, as shown. A guard band 430 may be placed between the DL Tx resources and the UL Rx resources. The frequency band 410 may be divided into one or more bandwidth parts (BWPs). As shown by reference numeral 440, the two panels may be used for UL Rx during the fourth time slot.

[0056] In some cases, the available bandwidth within the BWP may be compromised due to UL bands, guard bands, etc. In order to configure multiple frequency resources that can be used in situations such as this, resource bandwidth can be used. Resource bandwidth is a bandwidth that includes at least a portion of the BWP. The primary resource bandwidth is the resource bandwidth that the device of the BWP switches to as the active bandwidth upon receiving a BWP switching trigger. There is no mechanism for automatically switching between resource bandwidths. As a result, the device will continue to use the current resource bandwidth as the active bandwidth until an instruction to switch to a different resource bandwidth is received. This may result in consumption of unnecessary resources associated with the active bandwidth, unnecessary signaling overhead, and the like.

[0057] Some techniques and apparatus described herein enable automatic switching from a current resource bandwidth to a default resource bandwidth based at least in part on the expiration of an inactivity timer. As a result, bandwidth resources can be preserved, signaling overhead can be reduced, and the like. In some aspects, multiple default resource bandwidths can be configured according to a default resource bandwidth order. As a result, a device can switch from one default bandwidth to another default bandwidth based at least in part on the expiration of an inactivity timer, which can facilitate more flexibility in frequency resource allocation.

[0058] As indicated above, Figure 4 is provided as one or more examples. Other examples may differ from the Figure 4 Examples described.

[0059] Figure 5 is a diagram illustrating an example 500 associated with using a default resource bandwidth and an inactivity timer in accordance with various aspects of the present disclosure. Figure 5 As shown, example 500 includes base station 110 and UE 120 .

[0060] As indicated by reference numeral 505, the base station 110 may transmit and the UE 120 may receive a configuration of a default resource bandwidth (shown as "RBW 2"). In some aspects, the configuration may be carried in a radio resource control (RRC) message. In some aspects, for example, as shown, the base station 110 may configure several resource bandwidths (shown as "RBW 1", "RBW 2", "RBW 3", and "RBW 4"). In some aspects, the resource bandwidth may correspond to a specific BWP, as shown. As shown, the resource bandwidth (e.g., RBW 1, etc.) may include the entire BWP. In some aspects, the resource bandwidth (e.g., RBW 2, RBW 3, RBW 4, etc.) may include a portion of the BWP. In some aspects, the resource bandwidth (e.g., RBW 3, etc.) may be separable, including more than one portion of the BWP.

[0061] In some aspects, any one or more of these resource bandwidths may be configured as a default resource bandwidth. In some aspects, the default resource bandwidth may be designated for half-duplex operation. In some aspects, base station 110 may configure additional resource bandwidths (including one or more additional default resource bandwidths) associated with one or more additional BWPs. In some aspects, the additional resource bandwidth may be Figure 5 The same resource bandwidth shown in Figure 5 The resource bandwidth shown is different from the resource bandwidth, and so on.

[0062] In some aspects, the base station 110 may transmit and the UE 120 may receive the configuration of the inactivity timer. In some aspects, the configuration of the inactivity timer may be transmitted together with the configuration of the default resource bandwidth. In some aspects, the configuration of the inactivity timer may be carried in an RRC message. In some aspects, the inactivity timer may correspond to the BWP and at least one additional BWP. In some aspects, the inactivity timer may correspond to the BWP and at least one additional inactivity timer may correspond to at least one additional BWP. In some aspects, as described below in conjunction with Figure 6 As described, more than one inactivity timer can be configured.

[0063] In some aspects, the inactivity timer may correspond to the initial resource bandwidth. In some aspects, the inactivity timer may be based at least in part on an additional inactivity timer corresponding to the BWP. In some aspects, the duration of the inactivity timer may be shorter than the additional inactivity timer. In some aspects, the inactivity timer may be greater than or equal to the additional inactivity timer.

[0064] As shown in reference numeral 510, UE 120 and base station 110 may communicate using an initial resource bandwidth as an active bandwidth. In some aspects, for example, the initial resource bandwidth may be RBW 1, RBW 3, or RBW 4. In some aspects, the initial resource bandwidth may include at least a first portion of the BWP. As shown in reference numeral 515, UE 120 may switch to a default resource bandwidth (RBW 2) as an active bandwidth based at least in part on the expiration of a timer. In some aspects, the default resource bandwidth may include at least a second portion of the BWP. In some aspects, the expiration of a timer may include the expiration of an inactivity timer. As shown in reference numeral 520, UE 120 and base station 110 may communicate using a default resource bandwidth.

[0065] Aspects of the techniques and apparatus described herein enable automatic switching from a current resource bandwidth to a default resource bandwidth based at least in part on the expiration of an inactivity timer. As a result, bandwidth resources can be preserved, signaling overhead can be reduced, and the like.

[0066] As indicated above, Figure 5 are provided as examples. Other examples may differ from those described herein. Figure 5 Examples described.

[0067] Figure 6 is a diagram illustrating an example 600 of using multiple default resource bandwidths and inactivity timers in accordance with various aspects of the present disclosure. As shown, a BWP may be configured with several resource bandwidths (shown as "RBW 1," "RBW 2," "RBW 3," and "RBW 4").

[0068] As shown by reference numeral 610, the BWP may be configured with multiple default resource bandwidths (RBW 2 and RBW 3). In some aspects, the configuration may indicate a default resource bandwidth order associated with the multiple default bandwidths. In some aspects, the default resource bandwidth order may indicate an order according to which a UE (e.g., UE 120) will switch to each default resource bandwidth. In some aspects, the default bandwidth and / or the default resource bandwidth order may be configured using an RRC message.

[0069] As shown in reference numeral 620, the configured default resource bandwidth order may indicate an order in which the UE may switch to more than one default resource bandwidth, wherein the switching is based at least in part on timer expiration. As shown, for example, the current active resource bandwidth may be RBW 4. Upon expiration of a first inactivity timer, the UE switches from RBW 4 to a first default resource bandwidth (RBW 3) as the active resource bandwidth. Upon expiration of a second inactivity timer, the UE switches from RBW 3 to a second default resource bandwidth (RBW 2). Any number of default resource bandwidths and any number of timer expiration may be configured.

[0070] In some aspects, a single timer may be associated with both default resource bandwidths, the active resource bandwidth of the BWP, etc. For example, in some aspects, the expiration of the first timer may include a first expiration of an inactivity timer corresponding to the active resource bandwidth (causing the UE to switch from the active bandwidth to the first default resource bandwidth as the active bandwidth) and the expiration of the additional timer may include a second expiration of the same inactivity timer (causing the UE to switch from the first default resource bandwidth as the active bandwidth to the second default resource bandwidth as the active bandwidth). In some aspects, the inactivity timer may be reset based at least in part on the UE switching to the next default resource bandwidth as the active bandwidth.

[0071] In some aspects, each timer expiration may include the expiration of a different timer. In some aspects, each of the multiple timers may be associated with a different resource bandwidth. For example, in some aspects, the expiration of a first timer may include the expiration of a first resource bandwidth inactivity timer corresponding to RBW 4, and the expiration of a second timer may include the expiration of a second resource bandwidth inactivity timer corresponding to a default resource bandwidth.

[0072] In this way, the UE may switch from one default bandwidth to another default resource bandwidth based at least in part on the expiration of an inactivity timer, which may facilitate more flexibility in frequency resource allocation.

[0073] As indicated above, Figure 6 are provided as examples. Other examples may differ from those described herein. Figure 6 Examples described.

[0074] Figure 7 is a diagram illustrating an example process 700, performed, for example, by a UE, in accordance with various aspects of the present disclosure. Example process 700 is an example in which a UE (eg, UE 120, etc.) performs operations associated with using a default resource bandwidth and an inactivity timer.

[0075] like Figure 7 As shown, in some aspects, process 700 may include using an initial resource bandwidth as an active bandwidth for communication, wherein the initial resource bandwidth includes at least a first portion of the BWP (block 710). For example, the UE (e.g., using the receive processor 258, the transmit processor 264, the controller / processor 280, the memory 282, etc.) may use the initial resource bandwidth as the active bandwidth for communication, as described above. In some aspects, the initial resource bandwidth includes at least a first portion of the BWP, as described above in conjunction with Figure 5 and 6 Described.

[0076] like Figure 7As further shown in FIG. 7 , in some aspects, process 700 may include switching to a default resource bandwidth as an active bandwidth based at least in part on the expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP (block 720). For example, the UE (e.g., using receive processor 258, transmit processor 264, controller / processor 280, memory 282, etc.) may switch to a default resource bandwidth as an active bandwidth based at least in part on the expiration of a timer, as described above. In some aspects, the default resource bandwidth includes at least a second portion of the BWP, as described above in conjunction with Figure 5 and 6 Described. In some aspects, the default resource bandwidth may be designated for half-duplex operation. In some aspects, the timer expiration includes the expiration of an inactivity timer. In some aspects, the inactivity timer is used for the BWP, and the inactivity timer is used for at least one additional BWP. In some aspects, the inactivity timer is used for the BWP, and at least one additional inactivity timer is used for at least one additional BWP. In some aspects, the inactivity timer corresponds to the initial resource bandwidth and is based at least in part on the additional inactivity timer, and the additional inactivity timer corresponds to the BWP. In some aspects, the duration of the inactivity timer may be shorter than the additional inactivity timer. In some aspects, the inactivity timer corresponds to the initial resource bandwidth, and the additional inactivity timer corresponds to the default resource bandwidth.

[0077] Process 700 may include additional aspects, such as any single aspect or any combination of aspects described below and / or in conjunction with one or more other processes described elsewhere herein.

[0078] In a first aspect, process 700 includes receiving a configuration of a default resource bandwidth in an RRC message.

[0079] In a second aspect, alone or in combination with the first aspect, process 700 includes receiving a configuration of an inactivity timer in an RRC message.

[0080] In a third aspect, either alone or in combination with one or more of the first to second aspects, process 700 includes switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on the expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP.

[0081] In a fourth aspect, alone or in combination with one or more of the first to third aspects, the UE switches to an additional default resource bandwidth as an active bandwidth based at least in part on the default resource bandwidth order.

[0082] In a fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the timer expiration comprises a first expiration of an inactivity timer associated with the BWP, and the additional timer expiration comprises a second expiration of an inactivity timer associated with the BWP, wherein the inactivity timer is reset at least in part based on the UE switching to a default resource bandwidth as the active bandwidth.

[0083] In a sixth aspect, either alone or in combination with one or more of the first to fifth aspects, the timer expiration includes the expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and the additional timer expiration includes the expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

[0084] In a seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 700 includes receiving a configuration of a default resource bandwidth order associated with a plurality of default bandwidths including the default bandwidth and at least one additional default bandwidth, wherein the default resource bandwidth order indicates an order in which the UE will switch to the default resource bandwidth and the at least one additional bandwidth.

[0085] In an eighth aspect, alone or in combination with one or more of the first to seventh aspects, the configuration of the default resource bandwidth order is received in an RRC message.

[0086] although Figure 7 An example block diagram of process 700 is shown, but in some aspects, process 700 may include Figure 7 Additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in the process 700. Additionally or alternatively, two or more blocks of the process 700 may be executed in parallel.

[0087] Figure 8 800 is a block diagram of an example apparatus 800 for wireless communication. Apparatus 800 may be a UE, or a UE may include apparatus 800. In some aspects, apparatus 800 includes a receiving component 802 and a transmitting component 804, which may be in communication with each other (e.g., via one or more buses and / or one or more other components). As shown, apparatus 800 may use receiving component 802 and transmitting component 804 to communicate with another apparatus 806 (such as a UE, a base station, or another wireless communication device). As further shown, apparatus 806 may include a resource bandwidth switching component 808, among other examples.

[0088] In some aspects, the apparatus 800 may be configured to perform Figure 5-6 Additionally or alternatively, the apparatus 800 may be configured to perform one or more of the processes described herein (such as Figure 7In some aspects, the apparatus 800 and / or Figure 8 One or more components shown in the figure may include the above combination Figure 2 Additionally or alternatively, Figure 8 One or more components shown in the above may be combined Figure 2 In one or more components described herein, the components may be implemented in a computer program product. Additionally or alternatively, one or more components in the component set may be implemented at least in part as software stored in a memory. For example, a component (or a portion of a component) may be implemented as instructions or codes stored in a non-transitory computer-readable medium and may be executed by a controller or processor to perform the function or operation of the component.

[0089] The receiving component 802 may receive communications (such as reference signals, control information, data communications, or combinations thereof) from the device 806. The receiving component 802 may provide the received communications to one or more other components of the device 800. In some aspects, the receiving component 802 may perform signal processing (such as filtering, amplification, demodulation, analog-to-digital conversion, demultiplexing, deinterleaving, demapping, equalization, interference cancellation, or decoding, among other examples) on the received communications and may provide the processed signals to one or more other components of the device 806. In some aspects, the receiving component 802 may include a combination of the above. Figure 2 One or more antennas, demodulators, MIMO detectors, receive processors, controllers / processors, memories, or combinations thereof of the described UE.

[0090] Transmission component 804 may transmit communications (such as reference signals, control information, data communications, or combinations thereof) to device 806. In some aspects, one or more other components of device 806 may generate communications and may provide the generated communications to transmission component 804 for transmission to device 806. In some aspects, transmission component 804 may perform signal processing (such as filtering, amplification, modulation, digital-to-analog conversion, multiplexing, interleaving, mapping, or encoding, among other examples) on the generated communications and may transmit the processed signals to device 806. In some aspects, transmission component 804 may include a combination of the above. Figure 2 One or more antennas, modulators, transmit MIMO processors, transmit processors, controllers / processors, memory, or combinations thereof of the described UE. In some aspects, the transmitting component 804 can be co-located with the receiving component 802 in a transceiver.

[0091] Receiving component 802 and / or transmitting component 804 can facilitate communicating using an active bandwidth, wherein the active bandwidth comprises at least a portion of the BWP. Resource bandwidth switching component 808 can facilitate switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer.

[0092] Figure 8 The number and arrangement of components shown in the figure are provided as examples. In practice, there may be Figure 8 Additional components, fewer components, different components, or differently arranged components than those shown in FIG. Figure 8 Two or more components shown in may be implemented in a single component, or Figure 8 The single component shown in may be implemented as multiple distributed components. Additionally or alternatively, Figure 8 The component set (e.g., one or more components) shown in Figure 8 One or more functions performed by another set of components shown in FIG.

[0093] The following provides an overview of various aspects of the disclosure:

[0094] Aspect 1: A wireless communication method performed by a user equipment (UE), comprising: communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth includes at least a first portion of a bandwidth part (BWP); and switching to a default resource bandwidth as the active bandwidth based at least in part on the expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP.

[0095] Aspect 2: The method according to aspect 1 further comprises receiving the configuration of the default resource bandwidth in a radio resource control message.

[0096] Aspect 3: The method as recited in any one of Aspects 1 or 2, wherein the default resource bandwidth is designated for half-duplex operation.

[0097] Aspect 4: The method according to any one of aspects 1-3, wherein the expiration of the timer comprises the expiration of an inactivity timer.

[0098] Aspect 5: The method according to aspect 4 further comprises receiving the configuration of the inactivity timer in a radio resource control message.

[0099] Aspect 6: The method according to any one of aspects 4 or 5, wherein the inactivity timer is for the BWP, and wherein the inactivity timer is for at least one additional BWP.

[0100] Aspect 7: The method of aspect 4, wherein the inactivity timer is for the BWP, and wherein at least one additional inactivity timer is for at least one additional BWP.

[0101] Aspect 8: The method as recited in any one of Aspects 4-7, wherein the inactivity timer corresponds to the active bandwidth.

[0102] Aspect 9: The method of aspect 8, wherein the inactivity timer is based at least in part on an additional inactivity timer, and wherein the additional inactivity timer corresponds to the BWP.

[0103] Aspect 10: The method of aspect 9, wherein the duration of the inactivity timer may be shorter than the additional inactivity timer.

[0104] Aspect 11: The method of aspect 4, wherein the inactivity timer corresponds to the initial resource bandwidth, and wherein the additional inactivity timer corresponds to the default resource bandwidth.

[0105] Aspect 12: The method as described in any of aspects 1-11 further includes switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on the expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP.

[0106] Aspect 13: The method of aspect 12, wherein the UE switches to the additional default resource bandwidth as the active bandwidth based at least in part on a default resource bandwidth order.

[0107] Aspect 14: A method as described in either Aspect 12 or 13, wherein the timer expiration includes a first expiration of an inactivity timer associated with the BWP, and wherein the additional timer expiration includes a second expiration of the inactivity timer associated with the BWP, wherein the inactivity timer is reset at least in part based on the UE switching to the default resource bandwidth as the active bandwidth.

[0108] Aspect 15: A method as described in Aspect 12, wherein the expiration of the timer includes the expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and wherein the expiration of the additional timer includes the expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

[0109] Aspect 16: The method as described in any one of Aspects 1-15 further includes receiving a configuration of a default resource bandwidth order associated with multiple default bandwidths including the default bandwidth and at least one additional default bandwidth, wherein the default resource bandwidth order indicates the order according to which the UE will switch to the default resource bandwidth and the at least one additional bandwidth.

[0110] Aspect 17: The method according to Aspect 16, wherein the configuration of the default resource bandwidth order is received in a radio resource control message.

[0111] Aspect 18: An apparatus for wireless communication at a device, comprising: a processor, a memory coupled to the processor; and instructions, the instructions being stored in the memory and executable by the processor to cause the apparatus to perform a method as in one or more of Aspects 1-17.

[0112] Aspect 19: A device for wireless communication, comprising: a memory and one or more processors coupled to the memory, wherein the memory and the one or more processors are configured to perform the method of one or more aspects of aspects 1-17.

[0113] Aspect 20: An apparatus for wireless communication, comprising: at least one device for performing the method of one or more aspects of aspects 1-17.

[0114] Aspect 21: A non-transitory computer-readable medium storing code for wireless communication, the code comprising instructions executable by a processor to perform the method of one or more aspects of aspects 1-17.

[0115] Aspect 22: A non-transitory computer-readable medium storing an instruction set for wireless communication, the instruction set comprising one or more instructions that, when executed by one or more processors of a device, cause the device to perform a method as in one or more aspects of aspects 1-17.

[0116] The foregoing disclosure provides illustration and description, but is not intended to be exhaustive or to limit the aspects to the precise forms disclosed. Modifications and variations may be made in light of the above disclosure or may be acquired by practice of the various aspects.

[0117] As used herein, the term "component" is intended to be broadly interpreted as a combination of hardware, firmware, and / or hardware and software. As used herein, a processor is implemented with a combination of hardware, firmware, and / or hardware and software. It will be apparent that the system and / or method described herein can be implemented in different forms of hardware, firmware, and / or a combination of hardware and software. The actual dedicated control hardware or software code used to implement these systems and / or methods does not limit various aspects. Thus, the operation and behavior of these systems and / or methods are described herein without reference to specific software codes--it is understood that software and hardware can be designed to implement these systems and / or methods based at least in part on the description herein.

[0118] As used herein, satisfying a threshold may refer to a value being greater than a threshold, greater than or equal to a threshold, less than a threshold, less than or equal to a threshold, equal to a threshold, not equal to a threshold, etc., depending on the context.

[0119] Although specific feature combinations are described in the claims and / or disclosed in the specification, these combinations are not intended to limit the disclosure of various aspects. In fact, many of these features can be combined in a manner not specifically described in the claims and / or not disclosed in the specification. Although each dependent claim listed below can be directly subordinate to only one claim, the disclosure of various aspects includes that each dependent claim is combined with each other claim in this group of claims. The phrase quoting "at least one of" a column of items refers to any combination of these items, including a single member. As an example, "at least one of a, b or c" is intended to cover: a, b, c, ab, ac, bc, and abc, and any combination with multiple identical elements (for example, aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other sorting of a, b and c).

[0120] Elements, actions or instructions used herein should not be interpreted as key or necessary unless explicitly described as such. Moreover, as used herein, the articles "one" and "a" are intended to include one or more items, and can be used interchangeably with "one or more". In addition, as used herein, the article "the" is intended to include one or more items quoted in conjunction with the article "the", and can be used interchangeably with "one or more". In addition, as used herein, the terms "set" and "group" are intended to include one or more items (e.g., related items, non-related items, combinations of related and non-related items, etc.), and can be used interchangeably with "one or more". In the case of intending to have only one item, the phrase "only one" or similar language is used. Moreover, as used herein, the terms "having", "containing", "including", etc. are intended to be open terms. In addition, the phrase "based on" is intended to mean "based at least in part on", unless otherwise explicitly stated. Furthermore, as used herein, the term "or" when used in a sequence is intended to be inclusive and may be used interchangeably with "and / or" unless explicitly stated otherwise (e.g., when used in conjunction with "either of" or "only one of").

Claims

1. A wireless communication method performed by a user equipment UE, comprising: communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth comprises at least a first portion of a contiguous bandwidth portion BWP, wherein the BWP comprises a plurality of resource bandwidths, wherein a resource bandwidth comprises the entire BWP and other resource bandwidths comprise portions of the BWP, and wherein at least one resource bandwidth comprises more than one disjoint portions of the BWP, wherein one or more of the plurality of resource bandwidths are configured as default resource bandwidths; switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP; as well as switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP, wherein the timer expiration comprises expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and Wherein the additional timer expiration comprises expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

2. The method of claim 1, wherein at least one additional inactivity timer is used for at least one additional BWP.

3. The method of claim 1, wherein the UE switches to the additional default resource bandwidth as the active bandwidth based at least in part on a default resource bandwidth order.

4. The method of claim 1 , further comprising receiving a radio resource control message comprising at least one of: The configuration of the default resource bandwidth, Configuration of the inactivity timer, or Configuration of default resource bandwidth order.

5. A user equipment UE for wireless communication, comprising: Memory; as well as one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth comprises at least a first portion of a contiguous bandwidth portion BWP, wherein the BWP comprises a plurality of resource bandwidths, wherein a resource bandwidth comprises the entire BWP and other resource bandwidths comprise portions of the BWP, and wherein at least one resource bandwidth comprises more than one disjoint portions of the BWP, wherein one or more of the plurality of resource bandwidths are configured as default resource bandwidths; switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP; as well as switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP, wherein the timer expiration comprises expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and Wherein the additional timer expiration comprises expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

6. The UE of claim 5, wherein at least one additional inactivity timer is used for at least one additional BWP. 7 . The UE of claim 5 , wherein the UE switches to the additional default resource bandwidth as the active bandwidth based at least in part on a default resource bandwidth order.

8. The UE of claim 5, wherein the memory and the one or more processors are further configured to receive a radio resource control message including at least one of: The configuration of the default resource bandwidth, Configuration of the inactivity timer, or Configuration of default resource bandwidth order.

9. A non-transitory computer-readable medium storing one or more instructions for wireless communication, the one or more instructions comprising: One or more instructions that, when executed by one or more processors of a user equipment UE, cause the one or more processors to: communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth comprises at least a first portion of a contiguous bandwidth portion BWP, wherein the BWP comprises a plurality of resource bandwidths, wherein a resource bandwidth comprises the entire BWP and other resource bandwidths comprise portions of the BWP, and wherein at least one resource bandwidth comprises more than one disjoint portions of the BWP, wherein one or more of the plurality of resource bandwidths are configured as default resource bandwidths; switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP; as well as switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP, wherein the timer expiration comprises expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and Wherein the additional timer expiration comprises expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

10. The non-transitory computer readable medium of claim 9, wherein at least one additional inactivity timer is used for at least one additional BWP.

11. The non-transitory computer-readable medium of claim 9, wherein the UE switches to the additional default resource bandwidth as the active bandwidth based at least in part on a default resource bandwidth order.

12. An apparatus for wireless communication, comprising: means for communicating using an initial resource bandwidth as an active bandwidth, wherein the initial resource bandwidth comprises at least a first portion of a contiguous bandwidth portion BWP, wherein the BWP comprises a plurality of resource bandwidths, wherein a resource bandwidth comprises the entire BWP and other resource bandwidths comprise portions of the BWP, and wherein at least one resource bandwidth comprises more than one disjoint portions of the BWP, wherein one or more of the plurality of resource bandwidths are configured as default resource bandwidths; means for switching to a default resource bandwidth as the active bandwidth based at least in part on expiration of a timer, wherein the default resource bandwidth includes at least a second portion of the BWP; as well as means for switching from the default resource bandwidth to an additional default resource bandwidth as the active bandwidth based at least in part on expiration of an additional timer, wherein the additional default resource bandwidth includes at least a third portion of the BWP, wherein the timer expiration comprises expiration of a first resource bandwidth inactivity timer associated with the initial resource bandwidth, and Wherein the additional timer expiration comprises expiration of a second resource bandwidth inactivity timer associated with the default resource bandwidth.

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