Dormancy indication in sidelink communication systems

Abstract

Certain aspects of this disclosure provide techniques for signaling a user equipment (UE) to put a sidelink (SL) component carrier (CC) into sleep mode or to take the SL CC out of sleep mode (such as in mode 1 or mode 2 sidelink communication). In one example, a method performed by the UE includes: receiving an indication to put a first CC into sleep mode; and, in response to the indication, putting the SL CC into sleep mode. In another example, a method includes: sending an indication that the first UE will put the SL CC into sleep mode; and receiving an acknowledgment (ACK) of the indication.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority to U.S. Application No. 17 / 485,058, filed September 24, 2021, which claims the benefit and priority to U.S. Provisional Patent Applications Nos. 63 / 084,973 and 63 / 084,988, filed September 29, 2020, all of which are assigned to the assignee of this application and are incorporated herein by reference in their entirety, as fully set forth below and for all applicable purposes. Technical Field

[0003] Various aspects of this disclosure relate to wireless communication, and more specifically, various aspects of this disclosure relate to techniques for signaling a user equipment (UE) to put a sidelink (SL) component carrier (CC) into sleep mode or to take the SL CC out of sleep mode. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. These wireless communication systems can employ multiple access technologies that enable communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, etc.). Examples of such multiple access systems include the 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) system, the improved LTE (LTE-A) system, 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, and Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems.

[0005] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different wireless devices to communicate at the city, country, region, and even global levels. New radio (e.g., 5G NR) is an example of an emerging telecommunications standard. NR is a set of enhancements to the LTE mobile standard released by 3GPP. NR is designed to better support mobile broadband internet access by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using OFDMA with cyclic prefix (CP) on the downlink (DL) and uplink (UL). To this end, NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.

[0006] However, with the continued growth in demand for mobile broadband access, there is a need for further improvements to NR and LTE technologies. Preferably, these improvements should be applicable to other multiple access technologies and telecommunications standards that employ these technologies. Summary of the Invention

[0007] The systems, methods, and apparatuses of this disclosure have several aspects, none of which are solely responsible for their desired properties. Without limiting the scope of this disclosure as set forth in the following claims, some features will now be briefly discussed. Upon consideration of this discussion, and especially after reading the section entitled "Detailed Description," it will be understood how the features of this disclosure provide advantages, including improved sidelink communication and reduced UE power consumption.

[0008] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a user equipment (UE). In general, the method includes: receiving an instruction to put a first component carrier (CC) into sleep mode; and, in response to the instruction, putting a sidelink (SL) CC into sleep mode.

[0009] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a base station (BS). In general, the method includes: sending an instruction to a UE to put a first CC into sleep mode; and determining that the UE, in response to the instruction, puts the SL CC into sleep mode.

[0010] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a first UE. In general, the method includes: sending an indication that the first UE will put its SLCC into a sleep state; and receiving an acknowledgment (ACK) of the indication.

[0011] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a first UE. In summary, the method includes: receiving an indication that a second UE will put its SLCC into a sleep state; and sending an ACK for the indication.

[0012] Certain aspects of the subject matter described in this disclosure can be implemented in a method for wireless communication by a BS. In general, the method includes: receiving an indication that a first UE will put its SLCC into a sleep state; and sending an ACK for the indication.

[0013] Various aspects of this disclosure provide units, apparatus, processors, and computer-readable media for performing the methods described herein.

[0014] The foregoing has provided a fairly broad overview of the features and technical advantages of examples according to this disclosure in order to better understand the following detailed description. Additional features and advantages will be described below. The disclosed concepts and specific examples can be readily used as the basis for modifying or designing other structures for achieving the same purpose as this disclosure. Such equivalent constructions do not depart from the scope of the appended claims. The characteristics of the concepts disclosed herein (both their organization and manner of operation) and their associated advantages will be better understood when considered in conjunction with the accompanying drawings, based on the following description. Each drawing in the accompanying drawings is provided for illustrative and descriptive purposes and is not intended to define a limitation of the claims.

[0015] While aspects and embodiments are described herein by way of example, those skilled in the art will understand that additional implementations and use cases may arise in many different arrangements and scenarios. The innovations described herein can be implemented across many different platform types, devices, systems, shapes, sizes, and package arrangements. For example, various embodiments and / or uses may arise via integrated chip embodiments and other devices based on non-modular components (e.g., end-user devices, vehicles, communication devices, computing devices, industrial equipment, retail / purchasing devices, medical devices, AI-enabled devices, etc.). While some examples may or may not be specific to a particular use case or application, a wide variety of applicability to the described innovations is possible. Implementations can range from chip-level or modular components to non-modular, non-chip-level implementations, and further to aggregated, distributed, or OEM devices or systems incorporating one or more aspects of the described innovations. In some practical settings, devices incorporating the described aspects and features may also necessary include additional components and features for the implementation and practice of the claimed and described embodiments. For example, the transmission and reception of wireless signals necessarily involve multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders / converters, etc.). The innovations described herein are intended to be implemented in a variety of devices, chip-level components, systems, distributed arrangements, end-user equipment, etc., with different sizes, shapes, and constructions. Attached Figure Description

[0016] To gain a more detailed understanding of the features described above, reference can be made to various aspects (briefly outlined above), some of which are illustrated in the accompanying drawings. However, it should be noted that the drawings illustrate only certain typical aspects of this disclosure and are therefore not intended to limit its scope, as the description may allow for other equally valid aspects.

[0017] Figure 1This is a block diagram conceptually illustrating an example wireless communication network according to certain aspects of this disclosure.

[0018] Figure 2 This is a block diagram conceptually illustrating the design of an example base station (BS) and user equipment (UE) according to certain aspects of this disclosure.

[0019] Figure 3 These are example frame formats for certain wireless communication systems (e.g., New Radio (NR)) based on certain aspects of this disclosure.

[0020] Figure 4 An example discontinuous reception (DRX) scenario is shown in accordance with certain aspects of this disclosure.

[0021] Figure 5 This is an exemplary timeline of SCell activation and deactivation based on various aspects of this disclosure.

[0022] Figure 6 This is a flowchart illustrating example operations for wireless communication by a UE in accordance with certain aspects of this disclosure.

[0023] Figure 7 This is a flowchart illustrating example operations for wireless communication by a BS in accordance with certain aspects of this disclosure.

[0024] Figure 8 The aspects shown in this disclosure may include being configured to perform Figure 6 Communication devices that operate various components.

[0025] Figure 9 The aspects shown in this disclosure may include being configured to perform Figure 7 Communication devices that operate various components.

[0026] Figure 10 This is a schematic diagram of a communication system based on various aspects of this disclosure.

[0027] Figure 11 This is a flowchart illustrating example operations for wireless communication by a UE in accordance with certain aspects of this disclosure.

[0028] Figure 12 This is a flowchart illustrating example operations for wireless communication by a UE in accordance with certain aspects of this disclosure.

[0029] Figure 13 This is a flowchart illustrating example operations for wireless communication by a BS in accordance with certain aspects of this disclosure.

[0030] Figure 14The aspects shown in this disclosure may include being configured to perform Figure 11 and / or Figure 12 Communication devices that operate various components.

[0031] Figure 15 The aspects shown in this disclosure may include being configured to perform Figure 13 Communication devices that operate various components.

[0032] To aid understanding, the same reference numerals have been used where possible to designate common elements for the purposes of the figures. It is intended that elements disclosed in one aspect can be usefully applied to other aspects without requiring specific description. Detailed Implementation

[0033] This disclosure provides apparatus, methods, processing systems, and computer-readable media for signaling a user equipment (UE) to put a sidelink (SL) component carrier (CC) into sleep or to take the SL CC out of sleep in mode 1 or mode 2 sidelink communication.

[0034] In various aspects of this disclosure, such as in a Mode 1 communication system, the BS (e.g., gNB) schedules SL transmissions performed by the UE. The BS may send DCI format 3_0 with resource allocation to the UE to enable the UE to perform / provide SL transmissions for another UE. In various aspects of this disclosure, the UE may use carrier aggregation (CA) with multiple SL CCs to transmit SL transmissions. According to various aspects of this disclosure, not all SL CCs need to be used continuously, and therefore it may be advantageous to put some SL CCs into sleep mode.

[0035] For example, a UE can receive DCI 3_0 in any Uu CC configured on that UE. Such a configuration can lead to high monitoring overhead (e.g., power consumption), especially when the UE uses a CA with multiple SL CCs. Therefore, putting some SL CCs into sleep mode allows the UE to stop monitoring the control channels in those CCs, thereby saving power. Aspects of this disclosure enable the BS to instruct the first UE to put one or more SL CCs into sleep mode, thereby allowing the first UE to save power. Aspects of this disclosure also enable the BS to notify other UEs that the first UE has put SL CCs into sleep mode, so that other UEs do not attempt to send SL transmissions to the first UE via those SL CCs.

[0036] In various aspects of this disclosure, such as in a Mode 2 communication system, the UE schedules SL transmissions to other UEs. The UE may send sidelink control information (SCI) containing information about resources to be used for sending SL transmissions to another UE (e.g., the Physical Sidelink Shared Channel (PSSCH)), as well as other transmission parameters. In various aspects of this disclosure, the UE may use a CA with multiple SL CCs to send SL transmissions. According to various aspects of this disclosure, not all SL CCs need to be used continuously, and therefore it may be advantageous to put some SL CCs into SL sleep mode.

[0037] For example, a UE can receive an SCI in any SL CC configured on that UE. If the UE uses a CA with multiple SL CCs, this will result in high monitoring overhead (e.g., power consumption). In the example, putting some SL CCs to sleep allows the UE to stop monitoring the control channel in those CCs, and the UE saves power. However, if an SL CC is in sleep mode at the first UE, other UEs should not send an SCI to the first UE via that SL CC, and it is expected that the first UE will notify other UEs that it has put the SL CC to sleep. Therefore, aspects of this disclosure enable the first UE to notify other UEs that it will put one or more SL CCs to sleep, thereby allowing the first UE to save power. In some aspects of this disclosure, the first UE directly notifies other UEs that it will put one or more SL CCs to sleep and waits for acknowledgment (ACK) of the notification from the other UEs. In some aspects of this disclosure, the first UE notifies the BS to notify other UEs that it has put the SL CC to sleep, and the BS only sends an ACK to the first UE after receiving an ACK from the other UEs.

[0038] The following description provides examples of signaling a user equipment (UE) in a communication system to put a sidelink (SL) component carrier (CC) into sleep mode or to take the SL CC out of sleep mode, without limiting the scope, applicability, or examples set forth in the claims. Changes may be made to the function and arrangement of the elements discussed without departing from this disclosure. Various processes or components may be omitted, substituted, or added as appropriate in the various examples. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Furthermore, features described with respect to some examples may be combined with those in other examples. For example, an apparatus or a method may be implemented using any number of aspects set forth herein. Furthermore, the scope of this disclosure is intended to cover such apparatuses or methods implemented using structures, functions, or structures and functions other than or different from those set forth herein. It should be understood that any aspect of the disclosure herein may be embodied by one or more elements of the claims. The term “exemplary” is used herein to mean “serving as an example, instance, or illustration.” Any aspect described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other aspects.

[0039] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific Radio Access Technology (RAT) and can operate on one or more frequencies. A RAT can also be referred to as a radio technology, air interface, etc. A frequency can also be referred to as a carrier, subcarrier, frequency channel, tone, subband, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks with different RATs.

[0040] The techniques described herein can be used in a variety of wireless network and radio technologies. While this document may use terms commonly associated with 3G, 4G, and / or newer radio technologies (e.g., 5G NR) to describe aspects, aspects of this disclosure can be applied to communication systems based on other generations.

[0041] NR access can support a variety of wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or greater), millimeter wave (mmW) targeting high carrier frequencies (e.g., 24 GHz to 53 GHz or greater), massive machine-type communication (mMTC) targeting non-backward compatible MTC technologies, and / or mission-critical ultra-reliable low-latency communication (URLLC). These services can include latency and reliability requirements. These services can also have different transmission time intervals (TTIs) to meet corresponding quality of service (QoS) requirements. Furthermore, these services can coexist in the same subframe. NR supports beamforming and can dynamically configure beam direction. It can also support MIMO transmission with precoding. MIMO configurations in DL can support up to 8 transmit antennas, with up to 8 streams in multi-layer DL transmission and up to 2 streams per UE. Multi-layer transmission with up to 2 streams per UE can be supported. Aggregation of multiple cells with up to 8 serving cells can be supported.

[0042] Figure 1 An example wireless communication network 100 in which various aspects of this disclosure can be implemented is shown. For example, the wireless communication network 100 may be an NR system (e.g., a 5G NR network). Figure 1 As shown, the wireless communication network 100 can communicate with the core network 132. The core network 132 can communicate with one or more base stations (BS) 110 and / or user equipment (UE) 120 in the wireless communication network 100 via one or more interfaces.

[0043] Depending on certain aspects, BS 110 and UE 120 can be configured to signal to the UE to put the sidelink (SL) component carrier (CC) into sleep mode or to take the SL CC out of sleep mode. For example... Figure 1 As shown, BS 110a includes a CC manager 112, which, according to various aspects of this disclosure, sends an instruction to the UE (e.g., UE 120a) to put a first CC into sleep mode; and determines that the UE, in response to the instruction, puts the SL CC into sleep mode. UE 120a includes an SL CC manager 122, which, according to various aspects of this disclosure, receives an instruction to put a first CC into sleep mode; and, in response to the instruction, puts the SL CC into sleep mode.

[0044] According to some aspects, SL information manager 112 receives an indication that a first user equipment (e.g., UE 120a) will put the SLCC into a sleep state; and sends an acknowledgment (ACK) of that indication. According to various aspects of this disclosure, SL manager 122a sends an indication (e.g., to BS 110a and / or UE 120b) that a UE will put the SLCC into a sleep state; and receives an ACK of that indication (e.g., from BS 110a and / or UE 120b). SL manager 122a may also receive (e.g., from BS 110a and / or UE 120b) an indication that a second UE (e.g., UE 120b) will put the SLCC into a sleep state; and sends an ACK of that indication (e.g., to BS 110a and / or UE 120b). UE 120b includes an SL manager 122b, which (e.g., sends an indication to BS 110a and / or UE 120a) that the UE will put the SL CC into a sleep state; and (e.g., receives an ACK for the indication from BS 110a and / or UE 120a). According to various aspects of this disclosure, the SL manager 122b may also (e.g., receive an indication from BS 110a and / or UE 120a) that a second UE (e.g., UE 120a) will put the SL CC into a sleep state; and (e.g., sends an ACK for the indication to BS 110a and / or UE 120a).

[0045] like Figure 1 As shown, the wireless communication network 100 may include multiple BSs 110a-z (each individually referred to herein as BS 110 or collectively as BS 110) and other network entities. BS 110 may provide communication coverage for a specific geographic area (sometimes referred to as a "cell"), which may be fixed or movable depending on the location of the mobile BS 110. In some examples, BS 110 may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless communication network 100 using any suitable transport network via various types of backhaul interfaces (e.g., direct physical connection, wireless connection, virtual network, etc.). Figure 1 In the example shown, BS 110a, 110b, and 110c can be macro BSs for macro cells 102a, 102b, and 102c, respectively. BS 110x can be a pico BS for pico cell 102x. BS 110y and 110z can be femto BSs for femto cells 102y and 102z, respectively. A BS can support one or more cells.

[0046] BS 110 communicates with UEs 120a-y (each also individually referred to herein as UE 120 or collectively as UE 120) in the wireless communication network 100. UEs 120 (e.g., 120x, 120y, etc.) may be distributed throughout the wireless communication network 100, and each UE 120 may be fixed or mobile. The wireless communication network 100 may also include relay stations (e.g., relay station 110r) (also referred to as repeaters, etc.) that receive transmissions of data and / or other information from upstream stations (e.g., BS 110a or UE 120r) and transmit such transmissions to downstream stations (e.g., UE 120 or BS 110), or relay transmissions between UEs 120 to facilitate communication between devices.

[0047] Network controller 130 can communicate with a group of BSs 110 and provide coordination and control for these BSs 110 (e.g., via backhaul). In various aspects, network controller 130 can communicate with core network 132 (e.g., 5G core network (5GC)), which provides various network functions such as access and mobility management, session management, user plane functions, policy control functions, authentication server functions, unified data management, application functions, network openness functions, network repository functions, network slice selection functions, etc.

[0048] Figure 2 Example components of BS 110a and UE 120a are shown (e.g., Figure 1 The wireless communication network 100 can be used to implement various aspects of the present disclosure.

[0049] At BS 110a, the transmitting processor 220 can receive data from the data source 212 and control information from the controller / processor 240. Control information can be used for the Physical Broadcast Channel (PBCH), Physical Control Format Indicator Channel (PCFICH), Physical Hybrid ARQ Indicator Channel (PHICH), Physical Downlink Control Channel (PDCCH), Group Common PDCCH (GC PDCCH), etc. Data can be used for the Physical Downlink Shared Channel (PDSCH), etc. The Media Access Control (MAC)-Control Element (MAC-CE) is a MAC layer communication structure that can be used for exchanging control commands between wireless nodes. The MAC-CE can be carried in shared channels (such as the Physical Downlink Shared Channel (PDSCH), Physical Uplink Shared Channel (PUSCH), or Physical Sidelink Shared Channel (PSSCH)).

[0050] Processor 220 can process (e.g., encode and symbol map) data and control information separately to obtain data symbols and control symbols. Processor 220 can also generate reference signals, for example, for the primary synchronization signal (PSS), secondary synchronization signal (SSS), PBCH demodulation reference signal (DMRS), and channel state information reference symbol (CSI-RS). Transmit (TX) multiple-input multiple-output (MIMO) processor 230 can perform spatial processing (e.g., precoding, if applicable) on data symbols, control symbols, and / or reference symbols, and can provide output symbol streams to modulators (MODs) 232a-232t. Each modulator 232 can (e.g., for OFDM, etc.) process its corresponding output symbol stream to obtain an output sample stream. Each modulator can further process (e.g., convert to analog, amplify, filter, and up-convert) the output sample stream to obtain a downlink signal. The downlink signal from modulators 232a-232t can be transmitted via antennas 234a-234t respectively.

[0051] At UE 120a, antennas 252a-252r can receive downlink signals from BS 110a and can provide the received signals to demodulators (DEMODs) 254a-254r in the transceiver. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the corresponding received signal to obtain an input sample. Each demodulator can further process the input sample (e.g., for OFDM, etc.) to obtain received symbols. MIMO detector 256 can obtain received symbols from all demodulators 254a-254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receiver processor 258 can process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for UE 120a to data sink 260, and provide decoded control information to controller / processor 280.

[0052] On the uplink, at UE 120a, the transmitting processor 264 can receive and process data from data source 262 (e.g., for the Physical Uplink Shared Channel (PUSCH)) and control information from controller / processor 280 (e.g., for the Physical Uplink Control Channel (PUCCH)). The transmitting processor 264 can also generate reference symbols for reference signals (e.g., for Sounding Reference Signals (SRS)). Symbols from the transmitting processor 264 can be pre-encoded (if applicable) by the TX MIMO processor 266, further processed by modulators (e.g., for SC-FDM, etc.) in transceivers 254a-254r, and transmitted to BS 110a. At BS 110a, the uplink signal from UE 120a can be received by antenna 234, processed by modulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiving processor 238 to obtain decoded data and control information transmitted by UE 120a. The receiver processor 238 can provide decoded data to the data sink 239 and decoded control information to the controller / processor 240.

[0053] Memory 242 and 282 can store data and program code for BS 110a and UE 120a, respectively. Scheduler 244 can schedule the UE for data transmission on the downlink and / or uplink.

[0054] The antenna 252, processors 266, 258, 264, and / or controller / processor 280 of UE 120a and / or the antenna 234, processors 220, 230, 238, and / or controller / processor 240 of BS 110a can be used to perform the various techniques and methods described herein. For example, such as Figure 2 As shown, the controller / processor 240 of BS 110a has a CC manager 241, which, according to various aspects described herein, sends an instruction to the user equipment (UE) to put the first CC into sleep mode; and determines that the UE responds to the instruction to put the SL CC into sleep mode. Figure 2 As shown, the controller / processor 280 of UE 120a has an SL CC manager 281, which, according to various aspects described herein, receives an instruction to put a first CC into sleep mode; and, in response to the instruction, puts the SL CC into sleep mode. Although shown at the controller / processor, other components of UE 120a may be used to perform the operations described herein.

[0055] NR can utilize Orthogonal Frequency Division Multiplexing (OFDM) with a cyclic prefix (CP) on both the uplink and downlink. NR can support half-duplex operation using Time Division Duplex (TDD). OFDM and Single-Carrier Frequency Division Multiplexing (SC-FDM) divide the system bandwidth into multiple orthogonal subcarriers, which are often referred to as tones, frequency bands, etc. Data can be modulated onto each subcarrier. Modulation symbols can be transmitted in the frequency domain using OFDM and in the time domain using SC-FDM. The spacing between adjacent subcarriers can be fixed, and the total number of subcarriers can depend on the system bandwidth. The minimum resource allocation, called a resource block (RB), can be 12 consecutive subcarriers. The system bandwidth can also be divided into subbands. For example, a subband can cover multiple RBs. NR can support a basic subcarrier spacing (SCS) of 15 kHz and can define other SCSs (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.) relative to the basic SCS.

[0056] Figure 3 This is a diagram illustrating an example of frame format 300 for NR. The transmission timeline for each of the downlink and uplink can be divided into units of radio frames. Each radio frame can have a predetermined duration (e.g., 10 ms) and can be divided into 10 subframes with indices 0 to 9. Each subframe can include a variable number of time slots (e.g., 1, 2, 4, 8, 16... time slots), depending on the SCS. Each time slot can include a variable number of symbol periods (e.g., 7, 12, or 14 symbols), depending on the SCS. An index can be assigned to the symbol periods in each time slot. Micro-slots (which may be referred to as sub-slot structures) can refer to transmission time intervals with a duration less than a time slot (e.g., 2, 3, or 4 symbols). Each symbol in a time slot can indicate the link direction for data transmission (e.g., DL, UL, or flexible), and the link direction of each subframe can be dynamically switched. The link direction can be based on the time slot format. Each time slot can include DL / UL data and DL / UL control information.

[0057] In NR, a Synchronization Signal Block (SSB) is transmitted. In some aspects, SSBs can be transmitted in bursts, where each SSB in the burst corresponds to a different beam direction used for UE-side beam management (e.g., including beam selection and / or beam refinement). An SSB includes a PSS, an SSS, and a two-symbol PBCH. It can be transmitted at fixed time slot locations (such as in...). Figure 5SSBs are transmitted in symbols 0-3 shown in the diagram. PSS and SSS can be used by the UE for cell search and acquisition. PSS can provide half-frame timing, and SS can provide CP length and frame timing. PSS and SSS can provide cell identification. PBCH carries some basic system information, such as downlink system bandwidth, timing information within the radio frame, SS burst set periodicity, system frame number, etc. SSBs can be organized into SS bursts to support beam scanning. Additional system information, such as Residual Minimum System Information (RMSI), System Information Block (SIB), and Other System Information (OSI), can be transmitted on the Physical Downlink Shared Channel (PDSCH) in some subframes. For mmWave, SSBs can be transmitted up to sixty-four times, for example, using up to sixty-four different beam directions. Multiple transmissions of SSBs are called SS burst sets. SSBs in an SS burst set can be transmitted in the same frequency region, while SSBs in different SS burst sets can be transmitted in different frequency regions.

[0058] According to various aspects of this disclosure, the UE can be instructed to put the Uu interface component carriers into sleep mode (e.g., sleep state). The UE can be instructed to put only the component carriers used for the secondary cell (SCell) into sleep mode, and may not need to put the carriers used for the primary cell (PCell) into sleep mode.

[0059] In various aspects of this disclosure, a UE instructed to put its Uu interface CC into sleep mode can move the corresponding SCell to a state equivalent to the sleep bandwidth portion (BWP) state. In this state, the UE skips (i.e., does not perform) all PDCCH monitoring for the sleep SCell (i.e., similar to UE behavior for the sleep BWP). In this state, the UE can receive only the channel state information reference signal (CSI-RS) transmitted by the SCell and maintain the automatic gain control (AGC) procedure for the SCell.

[0060] According to various aspects of this disclosure, when the scheduled SCell is in sleep mode, a UE instructed to put the Uu interface to sleep mode may not monitor the PDCCH for the SCell, even for cross-carrier scheduling.

[0061] In various aspects of this disclosure, SCells can be moved into and out of sleep in non-overlapping sleep groups, each group being addressed by bits (e.g., in a bitmap) in the downlink control information (DCI) directed to the UE.

[0062] According to various aspects of this disclosure, when a bit in the DCI indicates that the UE should exit sleep mode, the UE configures that SCell to be in the default first non-sleep BWP.

[0063] In all aspects of this disclosure, when the UE is instructed to put the SCell to sleep, the UE stops any UL transmissions in the SCell, suspends any uplink grants of type 1 configurations in the SCell, and clears any uplink grants of type 2 configurations in the SCell.

[0064] According to various aspects of this disclosure, when the UE is instructed to put the SCell to sleep, the UE can stop all probe reference signal (SRS) transmissions (including aperiodic SRS, semi-periodic SRS and periodic SRS) in the SCell.

[0065] In various aspects of this disclosure, placing the Uu interface CC in sleep mode allows the UE to save power by eliminating PDCCH monitoring in the sleep CC.

[0066] According to aspects of this disclosure, switching from hibernation to non-hibernation may be faster than performing SCell activation on the UE.

[0067] In various aspects of this disclosure, in a Mode 1 communication system, the BS (e.g., gNB) schedules sidelink (SL) transmissions performed by the UE. The BS may send DCI format 3_0 with resource allocation to the UE for the UE to perform SL transmissions.

[0068] According to various aspects of this disclosure, a UE transmitting a sidelink transmission may send sidelink control information (SCI) in format 1 (SCI1) and / or format 2 (SCI2) to a UE intending to receive SL transmissions via the physical sidelink control channel (PSCCH) and / or physical sidelink shared channel (PSSCH). SCI1 or SCI2 may contain information about the SL transmission, including resource information and transmission parameters.

[0069] In various aspects of this disclosure, the UE may use carrier aggregation (CA) with multiple SL component carriers to transmit SL transmissions.

[0070] According to aspects of this disclosure, not all Uu-CCs need to be used continuously, and therefore it may be advantageous to put some Uu-CCs into Uu sleep mode. For example, a UE may receive DCI in any Uu-CC configured on that UE, which would result in high monitoring overhead (e.g., power consumption) if the UE uses a CA with multiple Uu-CCs. In this example, putting some Uu-CCs into sleep mode allows the UE to stop monitoring the control channel in those CCs, and the UE saves power.

[0071] In some cases, UE (e.g., Figure 1-2The UE 120a) shown can be placed in Discontinuous Receiver (DRX) mode to save power. For example... Figure 4 As shown in example timeline 400, in DRX mode, the UE enters sleep mode to conserve power and periodically wakes up to monitor the Physical Downlink Control Channel (PDCCH) for potential scheduled downlink reception and / or uplink transmissions for the UE. If DRX is not configured, the UE can always be ready to receive the PDCCH.

[0072] like Figure 4 As shown, DRX consists of a sleep portion 402 and a wake-up portion 404. The wake-up portion is referred to as the "on duration," during which the UE monitors the transmission of PDCCH for scheduled data. If a PDCCH (carrying DCI) is detected, the on duration can be extended. The duration after the UE is woken up (including the on duration and the extended portion) is referred to as the "active time." The wake-up signal (WUS) 410 can be monitored by the UE outside the active time. The WUS can be detected using relatively simple receiver components, allowing the UE to remain in a reduced power state. The WUS indicates whether the UE should (more fully) wake up for PDCCH monitoring. In some cases, the PDCCH may contain a SCell sleep indication field. If DRX is configured for the UE, there are various scenarios for sending such a PDCCH. According to the first scenario, outside the active time, the PDCCH can be sent as a PDCCH WUS. According to the second scenario, within the active time, the PDCCH 412 may or may not schedule data separately. If DRX is not configured (which can be considered a third scenario), the same mechanism used during the active period can be applied (i.e., PDCCH can schedule data separately or not).

[0073] The SCell sleep indication field in the PDCCH can individually indicate sleep for each SCell group (e.g., where the same behavior applies to each SCell in the group). In some cases, switching between sleep-type and non-sleep-type behaviors can be achieved by switching between the sleep bandwidth portion (BWP) and the regular BWP that allows full utilization of the SCell. For example, the SCells configured for the UE can be grouped into two groups. In the example, the SCell sleep indication for the first group puts all SCells in the first group into sleep.

[0074] Based on various aspects of this disclosure, the grouping of SCells may differ for hibernation indications in WUS and hibernation indications in PDCCH during active time.

[0075] Figure 5Based on various aspects of this disclosure, by UE and BS (e.g., Figure 1-2 The exemplary timeline 500 shows the SCell activation and deactivation operations performed by UE 120a and BS 110a. At 502, outside of DRX active time 560, the BS transmits a WUS, which includes a sleep indication 504 for each of the first SCell group 550 and the second SCell group 552. The sleep indication 504 indicates that the UE should activate the first SCell group and put the second SCell group to sleep. The UE activates the first SCell group at 510 and puts the second SCell group to sleep at 512. During DRX active time, the BS transmits a control channel 520, which schedules a PDSCH 522 and includes a sleep indication 524 for each of the first SCell group 550 and the second SCell group 552.

[0076] The first SCell group includes SCell 1 and SCell 2. The second SCell group includes SCell 3 and SCell 4. Sleep indication 524 instructs the UE to keep the first SCell group and the second SCell group from sleeping. At 526, the UE keeps both the first and second SCell groups from sleeping. Subsequently, the BS transmits a control channel (CCH) 530, which does not schedule a PDSCH and includes a sleep indication 532 for each of SCell 1, SCell 2, SCell 3, and SCell 4. Sleep indication 532 instructs the UE to keep SCell 1 asleep, keep SCell 2 awake, keep SCell 3 awake, and keep the SCell 4 group asleep. At 534, the UE keeps SCell 1 asleep, keeps SCell 2 awake, keeps SCell 3 awake, and keeps the SCell 4 group asleep.

[0077] Although Figure 5 The SCell operation is illustrated (where the SCell group is the same for a sleep indication in the WUS and for a sleep indication in the PDCCH that schedules the PDSCH), but this disclosure is not limited thereto. That is, the UE can use one SCell group when responding to a sleep indication in the WUS, and the UE can use a different SCell group when responding to a sleep indication in the PDCCH that is not in the WUS.

[0078] According to various aspects of this disclosure, when the UE puts the SL CC into a sleep state, the UE does not monitor SL SCIs from other UEs in the sleep SL CC, and the UE saves power by not monitoring SCIs in the SL CC. Additionally, the UE may (or may not) transmit SL CSIs, SRSs, and / or SSB RSs to other UEs in the SL CC. Specifically, the UE may (or may not) transmit beamforming detection (BFD) reference signals in the sleep SL CC.

[0079] In various aspects of this disclosure, the UE can receive SL CSI, SRS, and / or SSB RS from other UEs while in sleep mode (SL CC). Specifically, the UE can continue to receive BFD RS from other UEs while in sleep mode (SL CC).

[0080] According to various aspects of this disclosure, the UE may (or may not) receive the PSSCH and / or transmit the PSFCH in a dormant SL CC. The UE may be scheduled to receive the PSSCH via cross-carrier SL scheduling, where the control channel on another (non-dormant) CC is scheduled for the PSSCH on the dormant SL CC. In this case, the UE can still save power by not monitoring the SCI in the dormant SL CC.

[0081] In various aspects of this disclosure, the UE may (or may not) send SCI and / or PSSCH and receive PSFCH in sleep SL CC.

[0082] Currently known technologies do not define signaling for communication systems to instruct UEs to put SLCC into sleep mode or to take SLCC out of sleep mode.

[0083] Therefore, it is desirable to develop technologies and devices for notifying the UE by signaling whether to put the SL CC into sleep mode or to take the SL CC out of sleep mode.

[0084] Example side-link sleep indication in a mode 1 communication system

[0085] This disclosure provides techniques and apparatus for signaling a UE to put the SL CC into sleep mode or to take the SL CC out of sleep mode.

[0086] As previously described, the BS (e.g., gNB) can send a sleep indication to the UE, causing the UE to put the Uu interface CC into sleep mode. In various aspects of this disclosure, for sleep purposes, both the BS and the UE can treat the SL CC as another Uu interface CC. That is, the BS can do so in the WUS or on the control channel applied to the SL CC (e.g., see [link to WUS]). Figure 5 The UE sends a sleep instruction in the SL CC, and the UE that receives the sleep instruction can put the indicated SL CC into sleep mode.

[0087] In various aspects of this disclosure, the group used for sleep indication based on WUS or PDCCH may include SL CC. For example, a UE may be configured with two Uu interface SCells and two SL CCs. In this example, group 1 may include a first Uu interface SCell and SL CC1. Still in this example, group 2 may include a second Uu interface SCell and SL CC2. In this example, a sleep indication for group 1 will cause the UE to put the first Uu interface SCell and SL CC1 into sleep mode. Similarly, a sleep indication for group 2 will cause the UE to put the second Uu interface SCell and SL CC2 into sleep mode. For sleep indications in PDCCH that do not schedule PDSCH (e.g., see...), Figure 5 In CCH 530, the sleep indicator can use 4 bits, where each bit indicates whether one of the Uu interface SCells or one of the SL CCs is in sleep or not. Therefore, sleep indicator 1010 can mean putting the second Uu SCell and SL CC2 into sleep mode.

[0088] In another example, instead of the grouping described above, the UE can be configured with four groups. In this example, group 1 can include only the first Uu interface SCell; group 2 can include only the second Uu SCell; group 3 can include only SL CC1; and group 4 can include only SL CC2. That is, the groups can mix or not mix Uu interface SCells and SL CCs.

[0089] According to various aspects of this disclosure, the UE can derive the SL CC sleep indication from the Uu interface SCell sleep indication based on rules. For example, the UE can be configured with 4 Uu interface SCells and 4 SL CCs. In this example, group 1 includes the first and second Uu interface SCells, and group 2 includes the third and fourth Uu interface SCells. In this example, if the UE receives a sleep indication for group 1, the UE puts the first and second Uu interface SCells into sleep and puts the first and second SL CCs into SL sleep based on rules configured by the BS (e.g., gNB) or based on network communication standards (e.g., the sleep state of the i-th SL CC must be the same as the sleep state of the i-th Uu interface SCell).

[0090] In various aspects of this disclosure, the UE may receive from the BS a configuration indicating the correspondence between one or more Uu interface SCells and one or more SL CCs, such that a sleep indication for a Uu interface SCell also indicates that the UE should put the corresponding SL CC into sleep mode.

[0091] According to various aspects of this disclosure, when the SL CC and Uu interface SCell operate on the same set of frequency resources (e.g., frequency band, channel, or subchannel), the UE or BS can determine that the UE should put the SL CC into sleep mode based on a sleep indication that puts the Uu interface SCell into sleep mode.

[0092] In various aspects of this disclosure, the SLCC can be instructed to go to sleep in a separate control message from the BS (e.g., gNB). That is, the BS can send a message to the UE instructing the UE to put the SLCC to sleep without affecting the Uu interface SCell (if any) configured on the UE.

[0093] Based on various aspects of this disclosure, SL CCs can be grouped, and instructions for hibernation for a group apply to all SL CCs within that group.

[0094] In various aspects of this disclosure, the hibernation instruction may specify individual SL CCs to be put into hibernation, rather than specifying a group as previously described, similar to using a PDCCH without scheduling a PDSCH (e.g., Figure 5 The CCH 530 shown indicates the Uu interface SCell.

[0095] According to various aspects of this disclosure, the control message used to indicate hibernation for each SL CC or SL CC group can be DCI format 3_0 or Media Access Control (MAC)-Control Element (MAC-CE).

[0096] Figure 6 This is a flowchart illustrating an example operation 600 for wireless communication according to certain aspects of this disclosure. Operation 600 can be performed by a UE (e.g., UE 120a in wireless communication network 100). Operation 600 can be implemented in one or more processors (e.g., Figure 2 The software components that execute and run on the controller / processor 280. Furthermore, the UE's transmission and reception of signals during operation 600 can be achieved, for example, through one or more antennas (e.g., Figure 2 This can be achieved via antenna 252. In some aspects, the UE's transmission and / or reception of signals can be achieved via a bus interface for acquiring and / or outputting signals from one or more processors (e.g., controller / processor 280).

[0097] At 602, operation 600 can begin by receiving an instruction to put the first CC into sleep mode. At 604, operation 600 can continue by putting the SL CC into sleep mode in response to the instruction regarding the first CC. For example, the instruction to put the first CC into sleep mode could be an instruction for Uu CC to sleep mode. For the purpose of sleep indication, the UE can treat the SL CC as another Uu CC and apply the instruction for the first CC to the SL CC. As mentioned above, in some cases, the group used for sleep indication based on WUS or PDCCH can include CL CC. In another option, the UE can derive the SL CC sleep indication from the first CC sleep indication (e.g., Uu sleep indication) based on one or more rules. In the previous example, the UE can include four Uu SCells and four SL CCs. Group 1 includes the first and second Uu interface SCells, and Group 2 includes the third and fourth Uu interface SCells. When the UE receives a sleep indication for Group 1, the UE puts the first and second Uu interface SCells into sleep mode and the first and second SL CCs into SL sleep mode based on rules configured by the BS (e.g., gNB) or based on network communication standards.

[0098] Figure 7 This is a flowchart illustrating an example operation 700 for wireless communication according to certain aspects of this disclosure. Operation 700 can be performed, for example, by a BS (e.g., BS 110a in wireless communication network 100). Operation 700 can be complementary to operation 600 performed by a UE. Operation 700 can be implemented in one or more processors (e.g., Figure 2 The software components executed and running on the controller / processor 240. Furthermore, the transmission and reception of signals by the BS in operation 700 can be achieved, for example, via one or more antennas (e.g., Figure 2 This can be achieved via antenna 234. In some aspects, the BS can transmit and / or receive signals via a bus interface that acquires and / or outputs signals from one or more processors (e.g., controller / processor 240).

[0099] At 702, operation 700 can begin by sending an instruction to the UE to put the first CC into sleep mode. At 704, operation 700 can continue by determining that the UE responds to the instruction to put the SL CC into sleep mode. The example of operation 700 can complement the examples discussed for operation 600 and the previously given aspects.

[0100] Figure 8 A communication device 800 is shown, which includes components configured to perform operations for the techniques disclosed herein (such as in...). Figure 6The communication device 800 includes various components (e.g., corresponding to unit plus functional components) of the operation shown herein. The communication device 800 includes a processing system 802 coupled to a transceiver 808 (e.g., a transmitter and / or receiver). The transceiver 808 is configured to transmit and receive signals for the communication device 800 via an antenna 810, such as the various signals described herein. The processing system 802 may be configured to perform processing functions for the communication device 800, including processing signals received and / or to be transmitted by the communication device 800.

[0101] Processing system 802 includes a processor 804 coupled to a computer-readable medium / memory 812 via a bus 806. In some aspects, the computer-readable medium / memory 812 is configured to store instructions (e.g., computer-executable code) that, when executed by the processor 804, cause the processor 804 to perform actions... Figure 6 The operations shown herein, or other operations used to perform the various techniques discussed herein for signaling the UE to put the SL CC into sleep mode or to exit sleep mode, are described. In some aspects, the computer-readable medium / memory 812 stores: code 814 for receiving an instruction to put the first CC into sleep mode; and code 816 for putting the SL CC into sleep mode in response to the instruction. In some aspects, the processor 804 has circuitry configured to implement the code stored in the computer-readable medium / memory 812. The processor 804 includes: circuitry 824 for receiving an instruction to put the first CC into sleep mode; and circuitry 826 for putting the SL CC into sleep mode in response to the instruction.

[0102] Figure 9 A communication device 900 is shown, which includes components configured to perform operations using the techniques disclosed herein (such as in...). Figure 7 The communication device 900 includes various components (e.g., corresponding to unit plus functional components) of the operation shown herein. The communication device 900 includes a processing system 902 coupled to a transceiver 908 (e.g., a transmitter and / or receiver). The transceiver 908 is configured to transmit and receive signals for the communication device 900 via an antenna 910, such as the various signals described herein. The processing system 902 may be configured to perform processing functions for the communication device 900, including processing signals received and / or to be transmitted by the communication device 900.

[0103] Processing system 902 includes processor 904 coupled to computer-readable medium / memory 912 via bus 906. In some aspects, computer-readable medium / memory 912 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 904, cause processor 904 to perform actions... Figure 7The operations shown herein, or other operations used to perform the various techniques discussed herein for signaling the UE to put the SL CC into sleep mode or to exit sleep mode, are described. In some aspects, the computer-readable medium / memory 912 stores: code 914 for sending an instruction to the UE to put the first CC into sleep mode; and code 916 for determining that the UE, in response to the instruction, puts the SL CC into sleep mode. In some aspects, the processor 904 has circuitry configured to implement the code stored in the computer-readable medium / memory 912. The processor 904 includes: circuitry 924 for sending an instruction to the UE to put the first CC into sleep mode; and circuitry 926 for determining that the UE, in response to the instruction, puts the SLCC into sleep mode.

[0104] Example side-link sleep indication in a mode 2 communication system

[0105] This disclosure provides, among other things, means, processing systems and computer-readable media, for signaling a user equipment (UE) to put a side-link (SL) component carrier CC into sleep mode and to wait for an acknowledgment (ACK) before putting the SL CC into sleep mode.

[0106] Figure 10 This is a schematic diagram of a communication system 1000 according to various aspects of this disclosure. The communication system includes a gNB 1010 (which may be...) Figure 1-2 The example shown is BS 110a) and UEs 1020 and 1022 (which can be...). Figure 1 Examples of UEs 120a and 120b are shown. In the communication system, each of the UEs is configured with two SL CCs, 1030 and 1032. UE 1022 has SL CC 1032 in sleep mode. According to various aspects of this disclosure, it is expected that UE 1020 will not send any SL communication (such as SCI or PSSCH) via SL CC 1032 because UE 1022 has SL CC 1031 in sleep mode.

[0107] Based on various aspects of this disclosure, BS (e.g., Figure 10The gNB (1010) shown can indicate to other UEs that a UE's SLCC is in sleep mode. In some aspects, when a UE's SLCC is put into sleep mode, the UE notifies the BS (e.g., the gNB), and the BS notifies other UEs. Similarly, in some aspects, when a UE's SLCC exits sleep mode, the BS also notifies other UEs. In some aspects, which UEs are notified depends on the connectivity of the UE with the sleeping SLCC. In some aspects, the BS can only notify (e.g., via a sidelink) UEs connected to the UE with the sleeping SLCC. In some aspects, the BS can send an ACK to the UE with the sleeping SLCC to let the UE know that other UEs have been notified. In some of these aspects, the UE only puts the SLCC into sleep mode after receiving an ACK.

[0108] Return to Figure 10 In all aspects of this disclosure, when UE 1022 determines to put SL CC 1032 into sleep mode, UE 1022 sends notification 1040 to gNB 1010. gNB sends another notification 1042 to UE 1020. UE 1020 sends an acknowledgment 1044 to gNB for notification 1042. gNB then sends an acknowledgment 1046 to UE 1022 for notification 1040. Upon receiving acknowledgment 1046, UE 1022 puts SL CC 1032 into sleep mode.

[0109] In various aspects of this disclosure, a first UE can directly notify other UEs that it will put its SLCC into sleep mode. In such aspects, the notification can be sent via one or more of SCI, SCI2, PSSCH, or the Physical Side Link Feedback Channel (PSFCH). In some aspects of this disclosure, for each UE, there may be a "primary SLCC" (e.g., similar to a Uu interface primary cell (PCell)) that the UE has never put into sleep mode. In some aspects of this disclosure, sleep notifications for other SLCCs (i.e., SLCCs that are not primary SLCCs) can be sent and / or received via the primary SLCC. In some aspects of this disclosure, before the first UE can put its SLCC into sleep mode, a sleep notification from the first UE to another UE must be followed by an ACK from that other UE.

[0110] Figure 10An example is shown where a first UE directly notifies another UE that it will put SL CC 1032 into sleep mode. In this example, UE 1022 determines that SL CC 1032 will be put into sleep mode and sends a sleep notification 1050 for SL CC 1032 to UE 1020. UE 1020 sends an ACK 1052 for the sleep notification, so that UE 1022 knows that UE 1020 will not send SCI in SL CC 1032. Otherwise, if UE 1020 does not receive the sleep notification due to some error, and UE 1022 believes that UE 1020 has received the notification, then UE 1020 can send an SCI in SL CC 1032 that UE 1022 will not receive, because UE 1022 has stopped monitoring SL CC 1032.

[0111] Figure 11 This is a flowchart illustrating an example operation 1100 for wireless communication according to certain aspects of this disclosure. Operation 1100 can be performed by a UE (e.g., UE 120a or UE 120b in wireless communication network 100). Operation 1100 can be implemented in one or more processors (e.g., Figure 2 The software components executed and running on the controller / processor 280. Furthermore, the UE's transmission and reception of signals during operation 1100 can be achieved, for example, through one or more antennas (e.g., Figure 2 This can be achieved via antenna 252. In some aspects, the UE's transmission and / or reception of signals can be achieved via a bus interface for acquiring and / or outputting signals from one or more processors (e.g., controller / processor 280).

[0112] At 1102, operation 1100 can begin by sending an indication that the first UE will put the SLCC into a sleep state. At 1104, operation 1100 can continue by receiving an ACK for the indication.

[0113] Figure 12 This is a flowchart illustrating an example operation 1200 for wireless communication according to certain aspects of this disclosure. Operation 1200 may be performed by a UE (e.g., UE 120a or UE 120b in wireless communication network 100). Operation 1200 may be complementary to operation 1100 performed by another UE. Operation 1200 may be implemented in one or more processors (e.g., Figure 2 The software components executed and running on the controller / processor 280. Furthermore, the UE's transmission and reception of signals during operation 1200 can be achieved, for example, through one or more antennas (e.g., Figure 2This can be achieved via antenna 252. In some aspects, the UE's transmission and / or reception of signals can be achieved via a bus interface for acquiring and / or outputting signals from one or more processors (e.g., controller / processor 280).

[0114] At 1202, operation 1200 can begin by receiving an indication that the second UE will put the SL CC into a sleep state. At 1204, operation 1200 can continue by sending an ACK for the indication.

[0115] Figure 13 This is a flowchart illustrating an example operation 1300 for wireless communication according to certain aspects of this disclosure. Operation 1300 can be performed, for example, by a BS (e.g., BS 110a in wireless communication network 100). Operation 1300 can be complementary to operation 1200 performed by a UE. Operation 1300 can be implemented in one or more processors (e.g., Figure 2 The software components that execute and run on the controller / processor 240. Furthermore, the transmission and reception of signals by the BS in operation 1300 can be achieved, for example, via one or more antennas (e.g., Figure 2 This can be achieved via antenna 234. In some aspects, the BS can transmit and / or receive signals via a bus interface that acquires and / or outputs signals from one or more processors (e.g., controller / processor 240).

[0116] At 1302, operation 1300 can begin by receiving an indication that the first UE will put the SLCC into a sleep state. At 1304, operation 1300 can continue by sending an ACK for that indication. At 1306, operation 1300 can optionally continue by sending another indication to the second UE that the first UE will put the SLCC into a sleep state. At 1308, operation 1300 can optionally continue by receiving another ACK for the other indication from the second UE.

[0117] Figure 14 A communication device 1400 is shown, which includes components configured to perform operations for the techniques disclosed herein (such as in...). Figure 5-6Various components (e.g., corresponding to unit plus functional components) are shown in the diagram. The communication device 1400 includes a processing system 1402 coupled to a transceiver 1408 (e.g., a transmitter and / or receiver). The transceiver 1408 is configured to transmit and receive signals for the communication device 1400 via an antenna 1410, such as the various signals described herein. 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.

[0118] Processing system 1402 includes processor 1404 coupled to computer-readable medium / memory 1412 via bus 1406. In some aspects, computer-readable medium / memory 1412 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1404, cause processor 1404 to perform actions... Figure 11-12 The operations shown herein, or other operations used to perform the various techniques discussed herein for signaling a UE to put the SL component carrier CC into sleep mode, are described. In some aspects, the computer-readable medium / memory 1412 stores: code 1414 for transmitting an indication that a first UE will put the SL CC into sleep mode; code 1416 for receiving an ACK for that indication; code 1418 for receiving an indication that a second UE will put the SL CC into sleep mode; and code 1420 for transmitting an ACK for that indication. 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 1424 for transmitting an indication that a first UE will put the SL CC into sleep mode; circuitry 1426 for receiving an ACK for that indication; circuitry 1428 for receiving an indication that a second UE will put the SL CC into sleep mode; and circuitry 1430 for transmitting an ACK for that indication.

[0119] Figure 15 A communication device 1500 is shown, which includes components configured to perform operations for the techniques disclosed herein (such as in...). Figure 7 Various components (e.g., corresponding to unit plus functional components) are shown in the diagram. The communication device 1500 includes a processing system 1502 coupled to a transceiver 1508 (e.g., a transmitter and / or receiver). The transceiver 1508 is configured to transmit and receive signals for the communication device 1500 via an antenna 1510, such as the various signals described herein. 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.

[0120] Processing system 1502 includes processor 1504 coupled to computer-readable medium / memory 1512 via bus 1506. In some aspects, computer-readable medium / memory 1512 is configured to store instructions (e.g., computer-executable code) that, when executed by processor 1504, cause processor 1504 to perform actions... Figure 13 The operations shown herein may be other operations used to perform the various techniques discussed herein for signaling a UE to put the SL component carrier CC into sleep mode. In some aspects, the computer-readable medium / memory 1512 stores: code 1514 for receiving an indication that a first UE will put the SL CC into sleep mode; code 1516 for sending an ACK to that indication; code 1518 for sending another indication to a second UE that the first UE will put the SL CC into sleep mode; and code 1520 for receiving another ACK to the other indication from the second UE. In some aspects, the processor 1504 has circuitry configured to implement the code stored in the computer-readable medium / memory 1512. The processor 1504 includes: circuitry 1524 for receiving an indication that the first UE will put the SL CC into sleep mode; circuitry 1526 for sending an ACK to that indication; circuitry 1528 for sending another indication to the second UE that the first UE will put the SL CC into sleep mode; and circuitry 1530 for receiving another ACK to the other indication from the second UE.

[0121] Example

[0122] Aspect 1: A method for wireless communication by a user equipment (UE) includes: receiving an instruction to put a first component carrier (CC) into sleep mode; and in response to the instruction regarding the first CC, putting a side link (SL) CC into sleep mode.

[0123] Aspect 2: The method according to aspect 1 further includes: when the SL CC is in the sleep state, avoiding decoding of the control channel transmitted via the SL CC.

[0124] Aspect 3: The method according to one of aspects 1-2, wherein the first CC includes a CC for a secondary cell (SCell).

[0125] Aspect 4: The method according to any one of aspects 1-3, wherein receiving the instruction includes: receiving the physical downlink control channel (PDCCH) via the primary CC.

[0126] Aspect 5: The method according to one of aspects 1-4, wherein the instruction further indicates placing the first auxiliary CC group, including the first CC, into sleep mode.

[0127] Aspect 6: The method according to aspect 5, wherein the indication comprises bits in a bitmap, wherein each entry in the bitmap corresponds to a different CC group.

[0128] Aspect 7: The method according to any one of Aspects 1-6, wherein the first CC includes a CC for a secondary cell (SCell), and the method further includes: determining the SL CC corresponding to the CC for the SCell.

[0129] Aspect 8: The method according to aspect 7 further includes: receiving a signal indicating the correspondence between the SL CC and the CC used for the SCell.

[0130] Aspect 9: The method according to any one of Aspects 1-8, wherein the indication is received in a control message from a base station (BS), wherein the control message does not affect the configuration of the secondary cell (SCell) for the UE.

[0131] Aspect 10: The method according to one of Aspect 9, wherein the instruction further instructs to place the first CC group including the SL CC into hibernation.

[0132] Aspect 11: According to the method of aspect 9, wherein the control message includes type 3_0 downlink control information (DCI).

[0133] Aspect 12: According to the method of aspect 9, wherein the control message includes a Media Access Control Element (MAC-CE).

[0134] Aspect 13: The method according to one of aspects 1-12, wherein receiving the instruction further includes: receiving another instruction to place the SL CC into the hibernation state.

[0135] Aspect 14: A method for wireless communication by a base station (BS), comprising: sending an instruction to a user equipment (UE) to put a first component carrier (CC) into sleep mode; and determining that the UE, in response to the instruction regarding the first CC, puts a side link (SL) CC into sleep mode.

[0136] Aspect 15: The method according to aspect 14, wherein the instruction further instructs the CC for the secondary cell (SCell) to be placed in the dormant state.

[0137] Aspect 16: The method according to one of aspects 14-15, wherein sending the indication includes: sending the physical downlink control channel (PDCCH) via the primary CC.

[0138] Aspect 17: The method according to one of aspects 14-16, wherein the instruction further indicates placing a first CC group including the first CC into a dormant state.

[0139] Aspect 18: The method according to aspect 17, wherein the indication comprises bits in a bitmap, wherein each entry in the bitmap corresponds to a different CC group.

[0140] Aspect 19: A method according to one of aspects 14-18, wherein the first CC includes a CC for a secondary cell (SCell), and the method further includes: determining the SL CC corresponding to the CC for the SCell.

[0141] Aspect 20: The method according to aspect 19 further includes: sending a signal indicating the correspondence between the SL CC and the CC used for the SCell.

[0142] Aspect 21: The method according to one of aspects 14-20, wherein the indication is sent to the UE in a control message, wherein the control message does not affect the configuration of the secondary cell (SCell) for the UE.

[0143] Aspect 22: The method according to aspect 21, wherein the instruction further instructs to place the first CC group including the SL CC into hibernation.

[0144] Aspect 23: According to the method of aspect 21, wherein the control message includes type 3_0 downlink control information (DCI).

[0145] Aspect 24: The method according to aspect 21, wherein the control message includes a Media Access Control Element (MAC-CE).

[0146] Aspect 25: The method according to any one of aspects 14-24 further includes: notifying at least one other UE that the UE has placed the SL CC into the sleep state.

[0147] Aspect 26: According to one of aspects 14-25, the method of sending the instruction further includes: sending another instruction to put the SL CC into the hibernation state.

[0148] Aspect 27: The method according to one of aspects 14-26, wherein the determination is based on receiving an acknowledgment (ACK) from the UE.

[0149] Aspect 28: An apparatus for wireless communication, comprising a unit for performing one or more methods according to aspects 1-27.

[0150] Aspect 29: An apparatus for wireless communication, comprising: a memory; and a processor coupled to the memory, the memory and the processor being configured to perform one or more methods according to aspects 1-27.

[0151] Aspect 30: A computer-readable medium comprising instructions that, when executed by a processing system, cause the processing system to perform one or more methods according to aspects 1-27.

[0152] Aspect 31: A method for wireless communication by a first user equipment (UE), comprising: sending an indication that the first UE will put a sidelink (SL) component carrier (CC) into a sleep state; and receiving an acknowledgment (ACK) of the indication.

[0153] Aspect 32: The method according to aspect 31 further includes: placing the SL CC into the sleep state in response to the ACK.

[0154] Aspect 33: The method according to any one of aspects 31-32 further includes: avoiding decoding of the control channel transmitted via the SL CC when the SL CC is in the sleep state.

[0155] Aspect 34: The method according to one of aspects 31-33, wherein: sending the indication includes: sending the indication to a base station (BS); and the ACK is received from the BS.

[0156] Aspect 35: The method according to one of aspects 31-34, wherein: sending the indication includes: sending the indication to a second UE; and the ACK is received from the second UE.

[0157] Aspect 36: According to the method of aspect 35, sending the indication includes sending the indication in at least one of side link control information (SCI), physical side link shared channel (PSSCH), or physical side link feedback channel (PSFCH).

[0158] Aspect 37: According to the method of aspect 35, sending the instruction includes: sending the instruction via a primary SL CC different from the SL CC.

[0159] Aspect 38: The method according to aspect 35 further includes: sending a third UE another indication that the first UE will put the SL CC into the sleep state; receiving another ACK from the third UE for the other indication; and avoiding putting the SL CC into the sleep state until the ACK and the other ACK are received.

[0160] Aspect 39: A method for wireless communication by a first user equipment (UE), comprising: receiving an indication that a second UE will put a sidelink (SL) component carrier (CC) into a sleep state; and sending an acknowledgment (ACK) of the indication.

[0161] Aspect 40: The method according to aspect 39 further includes: after sending the ACK, avoiding sending the control channel to the first and second UEs via the SLCC.

[0162] Aspect 41: The method according to one of aspects 39-40, wherein: receiving the indication includes: receiving the indication from a base station (BS); and the ACK is sent to the BS.

[0163] Aspect 42: The method according to one of aspects 39-41, wherein: receiving the indication includes: receiving the indication from the second UE; and the ACK is sent to the second UE.

[0164] Aspect 43: The method according to aspect 42, wherein receiving the indication includes receiving the indication in at least one of side link control information (SCI), physical side link shared channel (PSSCH), or physical side link feedback channel (PSFCH).

[0165] Aspect 44: According to the method of aspect 42, receiving the instruction includes: receiving the instruction via a main SL CC different from the SL CC.

[0166] Aspect 45: A method for wireless communication by a base station (BS), comprising: receiving an indication that a first user equipment (UE) will put a sidelink (SL) component carrier (CC) into a sleep state; and sending an acknowledgment (ACK) of the indication.

[0167] Aspect 46: The method according to aspect 45 further includes: sending a second UE another indication that the first UE will put the SL CC into the sleep state; and receiving another ACK from the second UE for the other indication.

[0168] Aspect 47: According to the method of aspect 46, wherein the BS avoids sending the ACK until the BS receives the other ACK.

[0169] Aspect 48: An apparatus for wireless communication, comprising a unit for performing one or more methods according to aspects 31-47.

[0170] Aspect 49: An apparatus for wireless communication, comprising: a memory; and a processor coupled to the memory, the memory and the processor being configured to perform one or more methods according to aspects 31-47.

[0171] Aspect 50: A computer-readable medium comprising instructions that, when executed by a processing system, cause the processing system to perform one or more methods according to aspects 31-47.

[0172] Additional considerations

[0173] The techniques described in this article can be used in various wireless communication technologies, such as NR (e.g., 5G NR), 3GPP Long Term Evolution (LTE), Improved 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. CDMA networks can implement radio technologies such as Universal Terrestrial Radio Access (UTRA), cdma2000, etc. UTRA includes Wideband CDMA (WCDMA) and other variations of CDMA. cdma2000 encompasses the IS-2000, IS-95, and IS-856 standards. TDMA networks can implement radio technologies such as Global System for Mobile Communications (GSM). OFDMA networks can implement radio technologies such as NR (e.g., 5G RA), evolved UTRA (E-UTRA), Ultra Mobile Broadband (UMB), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, and Flash-OFDMA. UTRA and E-UTRA are part of the Universal Mobile Telecommunications System (UMTS). LTE and LTE-A are versions of UMTS using E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, and GSM are described in documents from an organization called the 3rd Generation Partnership Project (3GPP). CDMA2000 and UMB are described in documents from an organization called the 3rd Generation Partnership Project 2 (3GPP2). NR is an emerging wireless communication technology currently being deployed.

[0174] In 3GPP, the term "cell" can refer to the coverage area of ​​a Node B (NB) and / or the NB subsystem serving that coverage area, depending on the context in which the term is used. In NR systems, the term "cell" is interchangeable with BS, Next Generation Node B (gNB or gNodeB), Access Point (AP), Distributed Unit (DU), and Carrier or Transmitter / Receiver Point (TRP). A BS can provide communication coverage for macrocells, picocells, femtocells, and / or other types of cells. A macrocell can cover a relatively large geographic area (e.g., a radius of several kilometers) and can allow unrestricted access by UEs with service subscriptions. A picocell can cover a relatively small geographic area and can allow unrestricted access by UEs with service subscriptions. A femtocell can cover a relatively small geographic area (e.g., a residential area) and can allow restricted access by UEs associated with that femtocell (e.g., UEs in a Closed Subscriber Group (CSG), UEs for users in a residential area, etc.). A BS used for a macrocell can be called a macro BS. A BS used for a picocell can be called a pico BS. A BS used for a femtocell can be called a femtocell BS or a home BS.

[0175] A UE can also be referred to as a mobile station, terminal, access terminal, subscriber unit, station, customer premises equipment (CPE), cellular phone, smartphone, 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 apparatus, biometric sensor / device, wearable device (e.g., smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music device, video device, satellite radio unit, etc.), vehicle component or sensor, smart meter / sensor, industrial manufacturing equipment, GPS device, or any other suitable device configured to communicate via wireless or wired media. Some UEs can be considered machine-type communication (MTC) devices or evolved MTC (eMTC) devices. MTC and eMTCUE include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., which can communicate with the BS, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or from a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links. Some UEs can be considered Internet of Things (IoT) devices, which can be narrowband IoT (NB-IoT) devices.

[0176] In some examples, access to the air interface can be scheduled. A scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and apparatuses within its service area or cell. The scheduling entity may be responsible for scheduling, allocating, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, the subordinate entity utilizes the resources allocated by the scheduling entity. A base station is not the only entity that can be used as a scheduling entity. In some examples, a UE can be used as a scheduling entity and can schedule resources for one or more subordinate entities (e.g., one or more other UEs), and other UEs can utilize the resources scheduled by that UE for wireless communication. In some examples, a UE can be used as a scheduling entity in a peer-to-peer (P2P) network or a mesh network. In the mesh network example, in addition to communicating with a scheduling entity, UEs can also communicate directly with each other.

[0177] The methods disclosed herein include one or more steps or actions for implementing the methods. These method steps and / or actions may be interchanged with each other without departing from the scope of the claims. In other words, unless a specific order of steps or actions is specified, the order and / or use of a particular step and / or action may be modified without departing from the scope of the claims.

[0178] As used herein, the phrase “at least one of” in a list of items refers to any combination of those items, including a single member. For example, “at least one of a, b, or c” is intended to cover a, b, c, ab, ac, bc, and abc, as well as any combination of multiples of the same element (e.g., aa, aaa, aab, aac, abb, acc, bb, bbb, bbc, cc, and ccc, or any other ordering of a, b, and c).

[0179] As used herein, the term "determine" encompasses a wide variety of actions. For example, "determine" can include calculation, operation, processing, derivation, investigation, lookup (e.g., searching in a table, database, or other data structure), ascertainment, and so on. Furthermore, "determine" can include receiving (e.g., receiving information), accessing (e.g., accessing data in memory), and so on. Additionally, "determine" can include parsing, selecting, choosing, establishing, and so on.

[0180] The foregoing description is provided to enable any person skilled in the art to implement the various aspects described herein. Various modifications to these aspects will be apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects. Therefore, the claims are not intended to be limited to the aspects shown herein, but are to be consistent with the full scope of the language used in the claims, wherein, unless specifically stated otherwise, references to elements in the singular form are not intended to mean “one and only one,” but rather “one or more.” Unless otherwise expressly stated, the term “some” refers to one or more. All structural and functional equivalents of the elements throughout the various aspects described in this disclosure are expressly incorporated herein by reference and intended to be included by the claims, such structural and functional equivalents being known or to be known by those skilled in the art. Furthermore, nothing disclosed herein is intended to be offered to the public, whether or not such disclosure is expressly stated in the claims. No claim element is to be interpreted pursuant to paragraph 6 of 35 U.S.SC § 112 unless the element is expressly stated using the phrase “unit for…” or, in the case of a method claim, using the phrase “step for…”.

[0181] The various operations of the methods described above can be performed by any suitable unit capable of performing the corresponding function. These units may include various hardware and / or software components and / or modules, including but not limited to: circuits, application-specific integrated circuits (ASICs), or processors. Typically, in the presence of operations as shown in the figures, those operations may have corresponding paired units plus functional components with similar numbering.

[0182] The various illustrative logic blocks, modules, and circuits described in connection with this disclosure can be implemented or executed using a general-purpose processor, digital signal processor (DSP), application-specific integrated circuit (ASIC), 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. The processor may be a microprocessor, but alternatively, it may be any commercially available processor, controller, microcontroller, or state machine. The processor may also be implemented as a combination of computing devices, such as a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors combined with a DSP core, or any other such configuration.

[0183] If implemented in hardware, an example hardware configuration could include a processing system within a wireless node. The processing system could utilize a bus architecture. Depending on the specific application and overall design constraints of the processing system, the bus could include any number of interconnect buses and bridges. The bus could connect various circuitry, including a processor, machine-readable media, and a bus interface. In addition, the bus interface could be used to connect a network adapter to the processing system via the bus. The network adapter could be used to implement signal processing functions at the PHY layer. In the user terminal (see...) Figure 1 In this case, a user interface (e.g., keypad, display, mouse, joystick, etc.) can also be connected to the bus. The bus can also connect various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, etc., which are well known in the art and therefore will not be described further. The processor can be implemented using one or more general-purpose and / or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuits capable of executing software. Those skilled in the art will recognize how the functions described for the processing system can be optimally implemented based on the specific application and the overall design constraints imposed on the system as a whole.

[0184] If implemented in software, the functionality can be stored or transmitted as one or more instructions or code on or through a computer-readable medium. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other terms, software should be broadly interpreted to mean instructions, data, or any combination thereof. Computer-readable media includes both computer storage media and communication media, with communication media encompassing any medium that facilitates the transfer of a computer program from one place to another. The processor may be responsible for managing the bus and general-purpose processing, including executing software modules stored on the machine-readable storage medium. The computer-readable storage medium may be coupled to the processor so that the processor can read information from and write information to the storage medium. Alternatively, the storage medium may be an integral part of the processor. For example, the machine-readable medium may include a transmission line, a carrier wave modulated by data, and / or a separate computer-readable storage medium containing instructions stored thereon, all accessible to the processor via a bus interface. Alternatively or additionally, the machine-readable medium or any portion thereof may be integrated into the processor; for example, this could be a cache and / or a general-purpose register file. For example, examples of machine-readable storage media may include RAM (random access memory), flash memory, ROM (read-only memory), PROM (programmable read-only memory), EPROM (erasable programmable read-only memory), EEPROM (electrically erasable programmable read-only memory), registers, disks, optical disks, hard drives, or any other suitable storage media, or any combination thereof. Machine-readable media may be embodied in a computer program product.

[0185] Software modules may include a single instruction or many instructions, and may be distributed across several different code segments, within different programs, and across multiple storage media. Computer-readable media may include multiple software modules. A software module includes instructions that, when executed by a device such as a processor, cause a processing system to perform various functions. A software module may include sending modules and receiving modules. Each software module may reside in a single storage device or be distributed across multiple storage devices. For example, when a triggering event occurs, a software module may be loaded from a hard drive into RAM. During the execution of a software module, the processor may load some of the instructions into a cache to increase access speed. One or more cache lines may then be loaded into a general-purpose register file for execution by the processor. It will be understood that when the functionality of a software module is referred to below, this functionality is implemented by the processor when executing the instructions from that software module.

[0186] Furthermore, any connection is appropriately referred to as computer-readable medium. For example, if software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technology (e.g., infrared (IR), radio, and microwave), then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technology (e.g., infrared, radio, and microwave) is included in the definition of medium. As used herein, disk and disc include compressed optical disc (CD), laser disc, optical disc, digital versatile optical disc (DVD), floppy disk, and... Optical discs, where magnetic disks typically copy data magnetically, use lasers to optically copy data. Therefore, in some aspects, computer-readable media can include non-transitory computer-readable media (e.g., tangible media). Furthermore, in other aspects, computer-readable media can include transient computer-readable media (e.g., signals). Combinations of the above should also be included within the scope of computer-readable media.

[0187] Therefore, certain aspects may include a computer program product for performing the operations given herein. For example, such a computer program product may include a computer-readable medium having instructions stored (and / or encoded thereon) thereon, which can be executed by one or more processors to perform the operations described herein. For example, for performing the operations described herein and... Figure 6 and / or Figure 7 The instructions for the operation are shown in the figure.

[0188] Furthermore, it should be understood that modules and / or other suitable units for performing the methods and techniques described herein can be downloaded and / or otherwise obtained by the user terminal and / or base station, where applicable. For example, such a device can be coupled to a server to facilitate the transmission of units for performing the methods described herein. Alternatively, the various methods described herein can be provided via storage units (e.g., RAM, ROM, physical storage media such as compressed optical discs (CDs) or floppy disks, etc.) so that the user terminal and / or base station can access the various methods when the storage units are coupled to or provided to the device. Furthermore, any other suitable techniques for providing the methods and techniques described herein to the device can be used.

[0189] It should be understood that the claims are not limited to the precise configuration and components shown above. Various modifications, alterations, and variations may be made in the arrangement, operation, and details of the methods and apparatus described above without departing from the scope of the claims.

Claims

1. An apparatus for a user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured individually or uniformly as follows: The instruction to put a first CC group, including a first CC, into sleep mode is received by receiving the physical downlink control channel (PDCCH) via the primary component carrier (CC), wherein the first CC includes a CC for the secondary cell (SCell); Determine the side link (SL) CC corresponding to the CC used for the SCell; Receive a signal indicating the correspondence between the SL CC and the CC used for the SCell; and In response to the instruction, the SL CC is put into a sleep state.

2. The apparatus according to claim 1, wherein, The one or more processors are also configured individually or uniformly to: When the SL CC is in the sleep state, decoding of the control channel transmitted via the SL CC is avoided.

3. The apparatus according to claim 1, wherein, The instruction is received in a control message from a network entity, wherein the control message does not affect the configuration of the SCell used by the UE.

4. The apparatus according to claim 3, wherein, The first CC group includes the SL CC.

5. The apparatus according to claim 1, wherein, The one or more processors are also configured individually or uniformly to receive the instruction by receiving another instruction to put the SL CC into the sleep state.

6. A network entity for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured individually or uniformly as follows: The instruction to put a first CC group, including a first CC, into sleep mode is sent to the user equipment (UE) via the physical downlink control channel (PDCCH) transmitted via the primary component carrier (CC), wherein the first CC includes a CC for the secondary cell (SCell); Determine the side link (SL) CC corresponding to the CC used for the SCell; Send a signal indicating the correspondence between the SL CC and the CC used for the SCell; and determine that the UE, in response to the indication, puts the SL CC into a sleep state.

7. The network entity according to claim 6, wherein, The instruction is sent to the UE in a control message, wherein the control message does not affect the configuration of the SCell used by the UE.

8. The network entity according to claim 7, wherein, The first CC group includes the SL CC.

9. The network entity according to claim 6, wherein the one or more processors are further configured individually or uniformly to: The UE is notified to at least one other UE that it has put the SL CC into the sleep state.

10. The network entity according to claim 6, wherein, The one or more processors are also configured individually or uniformly to: The instruction is sent by sending another instruction to put the SL CC into the hibernation state.

11. The network entity according to claim 6, wherein, The determination is based on receiving an acknowledgment (ACK) from the UE.

12. An apparatus for a first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured individually or uniformly as follows: The first UE sends an indication to the second UE via the Physical Downlink Control Channel (PDCCH) transmitted via the primary component carrier (CC) that the first UE will put the SL CC group, which includes the first side downlink (SL) CC, into a dormant state. Receive an acknowledgment (ACK) of the indication from the second UE; Send another indication to the third UE that the first UE will put the SL CC group into the sleep state; Receive another ACK for the other indication from the third UE; as well as Avoid putting the SL CC group into the sleep state until the ACK and the other ACK are received.

13. The apparatus according to claim 12, wherein, The one or more processors are also configured individually or uniformly to: When the first SLCC is in the sleep state, decoding of the control channel transmitted via the first SLCC is avoided.

14. The apparatus according to claim 12, wherein, The one or more processors are also configured individually or uniformly to: The indication is sent by sending the indication to a network entity, wherein the ACK is received from the network entity.

15. The apparatus according to claim 12, wherein, The one or more processors are also configured individually or uniformly to: The indication is transmitted by sending the indication in at least one of the following: Side Link Control Information (SCI), Physical Side Link Shared Channel (PSSCH), or Physical Side Link Feedback Channel (PSFCH).

16. The apparatus according to claim 12, wherein, Sending the instruction includes sending the instruction via a primary SL CC that is different from the first SL CC.

17. An apparatus for a first user equipment (UE) for wireless communication, comprising: Memory; as well as One or more processors coupled to the memory, the one or more processors being configured individually or uniformly as follows: The second UE receives an indication that it will put the SL CC group, including the first side link (SL) CC, into a dormant state by receiving the physical downlink control channel (PDCCH) via the main component carrier; Send an acknowledgment (ACK) for the indicated instruction; Send another instruction to the second UE regarding the first UE's intention to put the SL CC group into the sleep state; Receive another ACK for the other indication from the second UE; as well as Avoid sending the ACK until the first UE receives the other ACK.

Images