Congestion control for various radio access technologies on unlicensed frequency bands

Abstract

In summary, various aspects of this disclosure relate to wireless communication. In some aspects, a user equipment (UE) can identify one or more channel occupancy times (COTs) associated with a first radio access technology (RAT) on an unlicensed frequency band. The UE can calculate congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in one or more COTs. The UE can use the congestion control parameters to communicate via the unlicensed frequency band. Numerous other aspects are provided.

Description

[0001] Cross-references to related applications

[0002] This patent application claims priority to U.S. Provisional Patent Application No. 63 / 057,788, filed July 28, 2020, entitled “CONGESTION CONTROL FOR MULTIPLE RADIO ACCESS TECHNOLOGIES ON AN UNLICENSEDBAND”; and U.S. Non-Provisional Patent Application No. 17 / 349,625, filed June 16, 2021, entitled “CONGESTION CONTROL FOR MULTIPLE RADIO ACCESS TECHNOLOGIES ON AN UNLICENSEDBAND”, which are expressly incorporated herein by reference. Technical Field

[0003] In summary, various aspects of this disclosure relate to wireless communications and to techniques and apparatus for congestion control of a variety of radio access technologies on unlicensed frequency bands. Background Technology

[0004] Wireless communication systems are widely deployed to provide a variety of telecommunications services such as telephone, video, data, messaging, and broadcasting. Typical wireless communication systems 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 technologies include Code Division Multiple Access (CDMA) systems, Time Division Multiple Access (TDMA) systems, Frequency Division Multiple Access (FDMA) systems, Orthogonal Frequency Division Multiple Access (OFDMA) systems, Single Carrier Frequency Division Multiple Access (SC-FDMA) systems, Time Division Synchronous Code Division Multiple Access (TD-SCDMA) systems, and Long Term Evolution (LTE). LTE / Improved LTE is an enhanced set of the Universal Mobile Telecommunications System (UMTS) mobile standard released by the 3rd Generation Partnership Project (3GPP).

[0005] A wireless network may include multiple base stations (BSs) capable of supporting communication for multiple user equipments (UEs). UEs can communicate with the BS via downlinks and uplinks. A downlink (or forward link) refers to the communication link from the BS to the UE, while an uplink (or reverse link) refers to the communication link from the UE to the BS. As will be described in more detail herein, a BS may be referred to as a Node B, gNB, Access Point (AP), Radio Headend, Transmit / Receive Point (TRP), New Radio (NR) BS, 5G Node B, etc.

[0006] The above multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that enables different user equipment to communicate at the city, country, region, and even global levels. NR (which can also be referred to as 5G) is an enhancement set of the LTE mobile standard released by 3GPP. NR is designed to better integrate with other open standards by improving spectrum efficiency, reducing costs, improving service, utilizing new spectrum, and using Orthogonal Frequency Division Multiplexing (OFDM) with Cyclic Prefix (CP) on the downlink (DL) and CP-OFDM and / or SC-FDM (e.g., also known as Discrete Fourier Transform Spread Spectrum OFDM (DFT-s-OFDM)) on the uplink (UL), thereby better supporting mobile broadband internet access, as well as beamforming, multiple-input multiple-output (MIMO) antenna technologies, and carrier aggregation. As the demand for mobile broadband access continues to grow, further improvements to LTE, NR, and other wireless access technologies remain useful. Summary of the Invention

[0007] In some aspects, a method of wireless communication performed by a user equipment (UE) includes: identifying one or more channel occupancy times (COTs) associated with a first radio access technology (RAT) on an unlicensed frequency band; calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and using the congestion control parameters to communicate via the unlicensed frequency band.

[0008] In some aspects, a method of wireless communication performed by a first UE includes: receiving from a second UE via a sidelink channel an indication of one or more Channels of the Unlicensed Frequency Band (COT) associated with a first RAT on an unlicensed frequency band; calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in the one or more COTs; and using the congestion control parameters to communicate via the unlicensed frequency band.

[0009] In some aspects, a UE for wireless communication includes: a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: identify one or more COTs associated with a first RAT on an unlicensed frequency band; calculate congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and use the congestion control parameters to communicate via the unlicensed frequency band.

[0010] In some aspects, a first UE for wireless communication includes: a memory and one or more processors operatively coupled to the memory, the memory and the one or more processors being configured to: receive from a second UE via a sidelink channel an indication of one or more COTs associated with a first RAT on an unlicensed frequency band; calculate congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in the one or more COTs; and use the congestion control parameters to communicate via the unlicensed frequency band.

[0011] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a UE, cause the UE to: identify one or more Channels of the Unlicensed Frequency Band (COT) associated with a first Radio Access Point (RAT) on an unlicensed frequency band; calculate congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and use the congestion control parameters to communicate via the unlicensed frequency band.

[0012] In some aspects, a non-transitory computer-readable medium storing a set of instructions for wireless communication includes: one or more instructions that, when executed by one or more processors of a first UE, cause the first UE to: receive from a second UE via a sidelink channel an indication of one or more Channels of the Unlicensed Radio Access (COT) associated with a first Radio Access (RAT) on an unlicensed frequency band; calculate congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in the one or more COTs; and use the congestion control parameters to communicate via the unlicensed frequency band.

[0013] In some aspects, an apparatus for wireless communication includes: a unit for identifying one or more Channels of the Unlicensed Frequency Band (COT) associated with a first Radio Access Terminal (RAT) on an unlicensed frequency band; a unit for calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and a unit for using the congestion control parameters to communicate via the unlicensed frequency band.

[0014] In some aspects, an apparatus for wireless communication includes: a unit for receiving, via a sidelink channel, an indication from a second device of one or more Channels of the Unlicensed Frequency Band (COT) associated with a first RAT on an unlicensed frequency band; a unit for calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in the one or more COTs; and a unit for using the congestion control parameters to communicate via the unlicensed frequency band.

[0015] In general, the aspects include methods, apparatus, systems, computer program products, non-transitory computer-readable media, user equipment, base stations, wireless communication equipment and / or processing systems as fully described herein with reference to the accompanying drawings and description and as shown by the accompanying drawings and description.

[0016] 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.

[0017] While aspects have been described herein by way of example, those skilled in the art will understand that such aspects can be implemented in many different arrangements and scenarios. The innovations described herein can be implemented using different platform types, devices, systems, shapes, sizes, and / or package arrangements. For example, some aspects can be implemented 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, or AI-enabled devices). Aspects can be implemented in chip-level components, modular components, non-modular components, non-chip-level components, device-level components, or system-level components. Devices incorporating the described aspects and features may include additional components and features for the implementation and enforcement of the claimed and described aspects. For example, the transmission and reception of wireless signals may include multiple components for analog and digital purposes (e.g., hardware components including antennas, RF chains, power amplifiers, modulators, buffers, processors, interleavers, adders, or summers). The innovations described herein are intended to be implemented in a variety of devices, chip-level components, systems, distributed arrangements, or end-user devices with different sizes, shapes, and configurations. Attached Figure Description

[0018] To gain a full understanding of the foregoing features of this disclosure, a more specific description of the invention, briefly summarized above, can be obtained by referring to various aspects, 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 the scope of the disclosure, as other equally valid aspects are permissible under this description. The same reference numerals in different drawings may identify the same or similar elements.

[0019] Figure 1 This is a schematic diagram illustrating an example of a wireless network according to this disclosure.

[0020] Figure 2 This is a schematic diagram illustrating an example of communication between a base station and a user equipment (UE) in a wireless network according to the present disclosure.

[0021] Figure 3 This is a schematic diagram illustrating an example of sidelink communication according to this disclosure.

[0022] Figure 4 This is a schematic diagram illustrating examples of sidelink communication and access link communication according to this disclosure.

[0023] Figure 5 This is a schematic diagram illustrating an example of congestion control parameter measurement according to this disclosure.

[0024] Figure 6-7 This is a schematic diagram illustrating an example of congestion control associated with various radio access technologies on unlicensed frequency bands according to this disclosure.

[0025] Figure 8-9 This is a schematic diagram illustrating an example process associated with congestion control of various radio access technologies on unlicensed frequency bands according to the present disclosure. Detailed Implementation

[0026] The various aspects of this disclosure are described more fully below with reference to the accompanying drawings. However, this disclosure may be embodied in many different forms and should not be construed as limited to any particular structure or function presented throughout this disclosure. Rather, these aspects are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art. Based on the teachings herein, those skilled in the art will understand that the scope of this disclosure is intended to cover any aspect of this disclosure disclosed herein, whether implemented independently of or in combination with any other aspect of this disclosure. For example, an apparatus or a method may be implemented using any number of the 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 the aspects of this disclosure set forth herein. It should be understood that any aspect of this disclosure disclosed herein may be embodied by one or more elements of the claims.

[0027] Several aspects of a telecommunications system will now be described with reference to various devices and techniques. These devices and techniques will be described in detail below and illustrated in the accompanying drawings, through various frames, modules, components, circuits, steps, processes, algorithms, etc. (collectively referred to as “elements”). These elements can be implemented using hardware, software, or a combination thereof. Whether such an element is implemented as hardware or software depends on the specific application and the design constraints imposed on the entire system.

[0028] It should be noted that while this document may use terms commonly associated with 5G or NR radio access technology (RAT) to describe aspects, aspects of this disclosure may be applied to other RATs, such as 3G RAT, 4G RAT and / or RATs after 5G (e.g., 6G).

[0029] Figure 1This is a schematic diagram illustrating an example of a wireless network 100 according to this disclosure. The wireless network 100 may be or may include elements of a 5G (NR) network and / or an LTE network, as well as other examples. The wireless network 100 may include multiple base stations 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities. A base station (BS) is an entity that communicates with a user equipment (UE) and may also be referred to as an NR BS, Node B, gNB, 5G Node B (NB), access point, Transmit / Receive Point (TRP), etc. Each BS can provide communication coverage for a specific geographic area. In 3GPP, the term "cell" may refer to the coverage area of ​​a BS and / or the BS subsystem serving that coverage area, depending on the context in which the term is used.

[0030] A BS can provide communication coverage for macrocells, picocells, femtocells, and / or another type of cell. 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 User Group (CSG)). A BS used for macrocells can be referred to as a macro BS. A BS used for picocells can be referred to as a pico BS. A BS used for femtocells can be referred to as a femtocell BS or a home BS. Figure 1 In the examples shown, BS 110a can be a macro BS for macro cell 102a, BS 110b can be a pico BS for pico cell 102b, and BS 110c can be a femto BS for femto cell 102c. A BS can support one or more (e.g., three) cells. The terms “eNB,” “base station,” “NR BS,” “gNB,” “TRP,” “AP,” “Node B,” “5G NB,” and “cell” are used interchangeably herein.

[0031] In some respects, the cell may not be stationary, and the geographical area of ​​the cell may move depending on the location of the mobile BS. In some respects, BSs may be interconnected with each other and / or with one or more other BSs or network nodes (not shown) in the wireless network 100 using any suitable transport network via various types of backhaul interfaces (such as direct physical connections or virtual networks).

[0032] The wireless network 100 may also include a relay station. A relay station is an entity that can receive data transmissions from an upstream station (e.g., a BS or a UE) and transmit the data transmissions to a downstream station (e.g., a UE or a BS). A relay station can also be a UE capable of relaying transmissions for other UEs. Figure 1 In the example shown, relay BS 110d can communicate with macro BS 110a and UE 120d to facilitate communication between BS 110a and UE 120d. A relay BS can also be referred to as a relay station, relay base station, repeater, etc.

[0033] Wireless network 100 can be a heterogeneous network comprising different types of Base Stations (BSs) such as macro BSs, pico BSs, femto BSs, repeater BSs, etc. These different types of BSs can have different transmit power levels, different coverage areas, and different effects on interference in wireless network 100. For example, macro BSs can have high transmit power levels (e.g., 5 to 40 watts), while pico BSs, femto BSs, and repeater BSs can have lower transmit power levels (e.g., 0.1 to 2 watts).

[0034] Network controller 130 can be coupled to a group of base stations (BSs) and can provide coordination and control for these BSs. Network controller 130 can communicate with the BSs via backhaul. BSs can also communicate with each other via wireless or wired backhaul (e.g., directly or indirectly).

[0035] UE 120 (e.g., 120a, 120b, 120c) may be distributed throughout the wireless network 100, and each UE may be stationary or mobile. UE may also be referred to as an access terminal, terminal, mobile station, user unit, station, etc. UE may be a cellular phone (e.g., a smartphone), personal digital assistant (PDA), wireless modem, wireless communication device, handheld device, laptop computer, cordless phone, wireless local loop (WLL) station, tablet device, camera, gaming device, netbook, smartbook, ultrabook, medical device or apparatus, biometric sensor / device, wearable device (smartwatch, smart clothing, smart glasses, smart wristband, smart jewelry (e.g., smart ring, smart bracelet, etc.)), entertainment device (e.g., music or video device, or 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.

[0036] Some UEs can be considered Machine-Type Communication (MTC) or Evolved or Enhanced Machine-Type Communication (eMTC) UEs. MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, and / or location tags, which can communicate with a base station, another device (e.g., a remote device), or some other entity. Wireless nodes can provide connectivity to or to a network (e.g., a wide area network such as the Internet or cellular networks) via wired or wireless communication links, for example. Some UEs can be considered Internet of Things (IoT) devices, and / or can be implemented as NB-IoT (Narrowband Internet of Things) devices. Some UEs can be considered Customer Premises Equipment (CPE). UE 120 can be included within a housing housing the components of UE 120, such as processor components and / or memory components. In some aspects, the processor components and memory components can be coupled together. For example, the processor components (e.g., one or more processors) and memory components (e.g., memory) can be operatively coupled, communicatively coupled, electronically coupled, and / or electrically coupled.

[0037] Typically, any number of wireless networks can be deployed in a given geographical area. Each wireless network can support a specific 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, channel, etc. Each frequency can support a single RAT in a given geographical area to avoid interference between wireless networks using different RATs. In some cases, NR or 5G RAT networks can be deployed.

[0038] In some respects, two or more UEs 120 (e.g., shown as UE 120a and UE 120e) may communicate directly using one or more sidelink channels (e.g., without using base station 110 as an intermediary for communication with each other). For example, UE 120 may communicate using peer-to-peer (P2P) communication, device-to-device (D2D) communication, vehicle-to-everything (V2X) protocols (e.g., which may include vehicle-to-vehicle (V2V) protocols or vehicle-to-infrastructure (V2I) protocols) and / or mesh networks. In this case, UE 120 may perform scheduling operations, resource selection operations, and / or other operations described herein as being performed by base station 110.

[0039] Devices in the wireless network 100 can communicate using the electromagnetic spectrum, which can be subdivided into various categories, bands, channels, etc., based on frequency or wavelength. For example, devices in the wireless network 100 can communicate using an operating band with a first frequency range (FR1) (spanning from 410 MHz to 7.125 GHz), and / or can communicate using an operating band with a second frequency range (FR2) (spanning from 24.25 GHz to 52.6 GHz). The frequencies between FR1 and FR2 are sometimes referred to as intermediate frequencies (IFs). Although a portion of FR1 is greater than 6 GHz, FR1 is generally referred to as the "below 6 GHz" band. Similarly, FR2 is generally referred to as the "millimeter wave" band, although it is different from the extremely high frequency (EHF) band (30 GHz–300 GHz) designated as the "millimeter wave" band by the International Telecommunication Union (ITU). Therefore, unless otherwise explicitly stated, it should be understood that the terms "below 6 GHz" and the like (if used herein) can broadly refer to frequencies below 6 GHz, frequencies within FR1, and / or intermediate frequencies (e.g., above 7.125 GHz). Similarly, unless otherwise explicitly stated, it should be understood that the terms "millimeter wave" and the like (if used herein) can broadly refer to frequencies within the EHF band, frequencies within FR2, and / or intermediate frequencies (e.g., below 24.25 GHz). It is anticipated that the frequencies included in FR1 and FR2 may be modified, and the techniques described herein are applicable to those modified frequency ranges.

[0040] As pointed out above, Figure 1 This is provided as an example. Other examples may differ from the one provided. Figure 1 The example described.

[0041] Figure 2 This is a schematic diagram illustrating an example of communication between a base station 110 and a UE 120 in a wireless network 100 according to the present disclosure. The base station 110 may be equipped with T antennas 234a to 234t, and the UE 120 may be equipped with R antennas 252a to 252r, wherein generally, T ≥ 1 and R ≥ 1.

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

[0043] At UE 120, antennas 252a to 252r can receive downlink signals from base station 110 and / or other base stations, and can provide the received signals to demodulators (DEMODs) 254a to 254r respectively. Each demodulator 254 can adjust (e.g., filter, amplify, down-convert, and digitize) the received signal to obtain an input sample. Each demodulator 254 can further process the input sample (e.g., for OFDM) to obtain a received symbol. MIMO detector 256 can obtain the received symbols from all R demodulators 254a to 254r, perform MIMO detection on the received symbols (if applicable), and provide the detected symbols. Receive processor 258 can process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to data sink 260, and provide decoded control information and system information to controller / processor 280. The term "controller / processor" can refer to one or more controllers, one or more processors, or a combination thereof. The channel processor can determine the Reference Signal Received Power (RSRP) parameter, Received Signal Strength Indicator (RSSI) parameter, Reference Signal Received Quality (RSRQ) parameter, and / or CQI parameter, as well as other examples. In some aspects, one or more components of the UE 120 may be included in the housing 284.

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

[0045] Antennas (e.g., antennas 234a to 234t and / or antennas 252a to 252r) may include or be included within the following: one or more antenna panels, antenna groups, antenna element sets, and / or antenna arrays, and other examples. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include one or more antenna elements. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include coplanar antenna element sets and / or non-coplanar antenna element sets. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements within a single housing and / or multiple antenna elements within housings. Antenna panels, antenna groups, antenna element sets, and / or antenna arrays may include antenna elements coupled to one or more transmitting and / or receiving components (such as...) Figure 2 One or more antenna elements (one or more components).

[0046] On the uplink, at UE 120, the transmitting processor 264 can receive and process data from data source 262 and control information from controller / processor 280 (e.g., for reporting RSRP, RSSI, RSRQ, and / or CQI). The transmitting processor 264 can also generate reference symbols for one or more reference signals. Symbols from the transmitting processor 264 can be pre-coded (if applicable) by TX MIMO processor 266, further processed by modulators 254a to 254r (e.g., for DFT-s-OFDM or CP-OFDM), and transmitted to base station 110. In some aspects, the modulator and demodulator (e.g., MOD / DEMOD 254) of UE 120 can be included in the modem of UE 120. In some aspects, UE 120 includes a transceiver. The transceiver may include any combination of antenna 252, modulator and / or demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264 and / or TX MIMO processor 266. The transceiver may be used by a processor (e.g., controller / processor 280) and memory 282 to perform aspects of any of the methods described herein, for example, as referenced. Figure 6-9 Described.

[0047] At base station 110, uplink signals from UE 120 and other UEs can be received by antenna 234, processed by demodulator 232, detected by MIMO detector 236 (if applicable), and further processed by receiver processor 238 to obtain decoded data and control information transmitted by UE 120. Receiver processor 238 can provide decoded data to data sink 239 and decoded control information to controller / processor 240. Base station 110 may include communication unit 244 and communicate with network controller 130 via communication unit 244. Base station 110 may include scheduler 246 to schedule UE 120 for downlink and / or uplink communication. In some aspects, modulators and demodulators (e.g., MOD / DEMOD 232) of base station 110 may be included in the modem of base station 110. In some aspects, base station 110 includes a transceiver. The transceiver may include any combination of antenna 234, modulator and / or demodulator 232, MIMO detector 236, receiver processor 238, transmitter processor 220, and / or TX MIMO processor 230. The transceiver may be used by a processor (e.g., controller / processor 240) and memory 242 to perform aspects of any of the methods described herein, for example, as referenced. Figure 6-9 Described.

[0048] The controller / processor 240 of base station 110, the controller / processor 280 of UE 120 and / or Figure 2 Any other components may perform one or more techniques associated with congestion control for various radio access technologies on unlicensed frequency bands, as described in more detail elsewhere herein. In some aspects, the controller / processor 240 of base station 110, the controller / processor 280 of UE 120, and / or Figure 2 Any other component can perform or direct, for example Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. Memory 242 and 282 may store data and program code for base station 110 and UE 120, respectively. In some aspects, memory 242 and / or memory 282 may include a non-transitory computer-readable medium storing one or more instructions (e.g., code and / or program code) for wireless communication. In some aspects, one or more instructions, when executed by one or more processors of base station 110 and / or UE 120 (e.g., directly, or after compilation, translation, and / or interpretation), may cause one or more processors, UE 120, and / or base station 110 to perform or instruct, for example... Figure 8 The process 800 Figure 9 The operation of process 900 and / or other processes as described herein. In some aspects, execution instructions may include run instructions, translation instructions, compilation instructions and / or interpretation instructions, and other examples.

[0049] In some aspects, the UE (e.g., UE 120) may include: a unit for identifying one or more COTs associated with a first RAT on an unlicensed frequency band; a unit for calculating congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in one or more COTs; and / or a unit for using the congestion control parameters to communicate via the unlicensed frequency band. In some aspects, such a unit may include a combination of Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TXMIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0050] In some aspects, the first UE (e.g., UE 120) may include: a unit for receiving from the second UE via a sidelink channel an indication of one or more COTs associated with a first RAT on an unlicensed frequency band; a unit for calculating congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in one or more COTs; and / or a unit for using the congestion control parameters to communicate via the unlicensed frequency band. In some aspects, such a unit may include a combination of Figure 2 One or more components of the described UE 120, such as controller / processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256 and / or receive processor 258.

[0051] Although Figure 2 The boxes in the diagram are shown as different components, but the functions described above with respect to these boxes can be implemented in a single hardware, software, or combined component, or in various combinations of components. For example, the functions described with respect to transmit processor 264, receive processor 258, and / or TX MIMO processor 266 can be performed by or under the control of controller / processor 280.

[0052] As pointed out above, Figure 2 This is provided as an example. Other examples may differ from the one provided. Figure 2 The example described.

[0053] Figure 3 This is a schematic diagram illustrating example 300 of sidelink communication according to this disclosure.

[0054] like Figure 3As shown, the first UE 305-1 can communicate with the second UE 305-2 (and one or more other UEs 305) via one or more sidelink channels 310. UEs 305-1 and 305-2 can communicate using one or more sidelink channels 310 for P2P communication, D2D communication, V2X communication (e.g., which may include V2V communication, V2I communication, and / or vehicle-to-pedestrian (V2P) communication), and / or mesh networking. In some aspects, UEs 305 (e.g., UEs 305-1 and / or UEs 305-2) can correspond to one or more other UEs described elsewhere herein, such as UE 120. In some aspects, the one or more sidelink channels 310 can use a PC5 interface and / or can operate in a high-frequency band (e.g., the 5.9 GHz band). Alternatively or concurrently, UE 305 may use Global Navigation Satellite System (GNSS) timing to synchronize the timing of transmission time intervals (TTIs) (e.g., frames, subframes, time slots, and / or symbols).

[0055] like Figure 3 As further shown, one or more sidelink channels 310 may include a Physical Sidelink Control Channel (PSCCH) 315, a Physical Sidelink Shared Channel (PSSCH) 320, and / or a Physical Sidelink Feedback Channel (PSFCH) 325. Similar to the Physical Downlink Control Channel (PDCCH) and / or Physical Uplink Control Channel (PUCCH) used for cellular communication with base station 110 via access link or access channel, PSCCH 315 can be used to transmit control information. Similar to the Physical Downlink Shared Channel (PDSCH) and / or Physical Uplink Shared Channel (PUSCH) used for cellular communication with base station 110 via access link or access channel, PSSCH 320 can be used to transmit data. In some aspects, PSCCH 315 may carry sidelink control information (SCI) 330, which may indicate various control information for sidelink communication, such as one or more resources (e.g., time resources, frequency resources, and / or space resources), wherein transport blocks (TB) 335 may be carried on PSCCH 320. TB 335 may include data. PSCCH 325 may be used to transmit sidelink feedback 340, such as hybrid automatic repeat request (HARQ) feedback (e.g., acknowledgment or negative acknowledgment (ACK / NACK) information), transmit power control (TPC), and / or scheduling request (SR).

[0056] In some aspects, one or more sidelink channels 310 may use a resource pool. In some aspects, scheduling assignments may be transmitted across time using specific resource blocks (RBs) in a subchannel (e.g., included in SCI 330). In some aspects, data transmissions associated with a scheduling assignment (e.g., on PSSCH 320) may occupy adjacent RBs in the same subframe as the scheduling assignment (e.g., using frequency division multiplexing). In some aspects, scheduling assignments and associated data transmissions are not transmitted on adjacent RBs.

[0057] In some aspects, UE 305 may operate using a transmission mode in which resource selection and / or scheduling is performed by UE 305 (e.g., instead of base station 110). In some aspects, UE 305 may perform resource selection and / or scheduling by sensing channel availability for transmission. In some aspects, UE 305 may measure RSSI parameters (e.g., sidelink RSSI (S-RSSI) parameters) associated with various sidelink channels, may measure RSRP parameters (e.g., PSSCH-RSRP parameters) associated with various sidelink channels, may measure RSRQ parameters (e.g., PSSCH-RSRQ parameters) associated with various sidelink channels, and may select the channel for transmission of sidelink communication based at least in part on these measurements.

[0058] Alternatively or alternatively, UE 305 may use SCI 330 received in PSCCH 315 to perform resource selection and / or scheduling, and SCI 320 may indicate occupied resources and / or channel parameters. Alternatively or alternatively, UE 305 may perform resource selection and / or scheduling by determining the Channel Busy Rate (CBR) associated with various sidelink channels, which may be used for rate control (e.g., by indicating the maximum number of resource blocks that UE 305 can use for a particular set of subframes).

[0059] In a transport mode where resource selection and / or scheduling is performed by UE 305, UE 305 can generate a sidelink grant and can send the grant in SCI 330. The sidelink grant can indicate one or more parameters (e.g., transport parameters) to be used for an upcoming sidelink transport, such as one or more resource blocks (e.g., for TB 335) to be used for an upcoming sidelink transport on PSSCH 320, one or more subframes to be used for an upcoming sidelink transport, and / or the MCS to be used for an upcoming sidelink transport. In some aspects, UE 305 can generate a sidelink grant indicating one or more parameters for semi-persistent scheduling (SPS), such as the period of the sidelink transport. Additionally or alternatively, UE 305 can generate a sidelink grant for event-driven scheduling (e.g., for on-demand sidelink messages).

[0060] As pointed out above, Figure 3 This is provided as an example. Other examples may differ from the one provided. Figure 3 The example described.

[0061] Figure 4 This is a schematic diagram illustrating example 400 of sidelink communication and access link communication according to the present disclosure.

[0062] like Figure 4 As shown, the transmitter (Tx) / receiver (Rx) UE 405 and the Rx / Tx UE 410 can communicate with each other via a side link, as described above. Figure 3 As described. Further, in some sidelink modes, base station 110 may communicate with Tx / Rx UE 405 via a first access link. Alternatively, in some sidelink modes, base station 110 may communicate with Rx / Tx UE 410 via a second access link. Tx / Rx UE 405 and / or Rx / Tx UE 410 may correspond to one or more UEs described elsewhere herein, such as... Figure 1 UE 120. Therefore, the direct link between UE 120 (e.g., via the PC5 interface) can be referred to as a sidelink, and the direct link between base station 110 and UE 120 (e.g., via the Uu interface) can be referred to as an access link. Sidelink communication can be transmitted via the sidelink, and access link communication can be transmitted via the access link. Access link communication can be downlink communication (from base station 110 to UE 120) or uplink communication (from UE 120 to base station 110).

[0063] As pointed out above, Figure 4 This is provided as an example. Other examples may differ from the one provided. Figure 4 The example described.

[0064] Figure 5 This is a schematic diagram illustrating example 500 of congestion control parameter measurement according to this disclosure.

[0065] In some aspects, the UE can measure one or more sidelink congestion control parameters for unlicensed frequency bands. Sidelink congestion control parameters may include sidelink CBR and / or sidelink channel occupancy (CR). Sidelink CBR and sidelink CR can be used as measures of sidelink congestion control on unlicensed frequency bands.

[0066] In some aspects, sidelink congestion control can affect or limit one or more transmission parameters of the UE. Transmission parameters may include MCS index and MCS table, number of subchannels per transmission, number of retransmissions, transmission power, and / or CR limit.

[0067] In some aspects, when the sidelink congestion control parameters indicate that the channel congestion meets a threshold, the UE can perform transmission on the sidelink channel according to a first set of transmission parameters. Conversely, when the sidelink congestion control parameters indicate that the channel congestion does not meet a threshold, the UE can perform transmission on the sidelink channel according to a second set of transmission parameters.

[0068] In some aspects, the UE can measure or estimate the sidelink CBR, at least in part, based on sidelink Received Signal Strength Indicator (RSSI) measurements. The sidelink RSSI can be defined as the linear average of the total received power (in watts (W)) observed in a configured subchannel within an OFDM symbol configured for a PSCCH or PSSCH, starting from the second OFDM symbol in that time slot. The UE can measure the sidelink CBR at time slot n, where the sidelink CBR can be defined as a portion of a subchannel in a resource pool, and the sidelink RSSI of that resource pool measured by the UE satisfies a pre-configured threshold sensed on the measurement window. The measurement window can be defined by [na, n-1] according to the higher-level parameter of time window size CBR (timeWindowSize-CBR), where a is equal to 100 or 100·2. μ A positive integer representing the number of time slots. The parameter μ can be a positive integer indicating the new radio digital scheme (numerology). Therefore, the measurement window can be a sliding measurement window that depends on the values ​​of n and a.

[0069] like Figure 5As shown, the UE can measure or estimate the side-link CBR at time slot n (e.g., time slot n0 or time slot n1) based at least in part on the side-link RSSI measurement. The side-link CBR measured at time slot n can correspond to a measurement window. After measuring the side-link CBR at time slot n, the UE can perform transmission in the transmission (Tx) time slot according to the congestion control processing time (N) (in time slots). Figure 5 As shown, N can be equal to two time slots, but this is not intended to impose a limit. The UE can perform transmission in the Tx time slot based on the side link CBR measured in the first n time slots. In some aspects, the UE can limit the transmission power and / or the number of retransmissions based on the side link CBR measured in the first n time slots.

[0070] In some aspects, such as Figure 5 As shown, N can depend on the UE processing capacity and the value of μ (new radio digital scheme). In some aspects, for the first UE processing capacity, N equals 2 when μ equals 0; N equals 2 when μ equals 1; N equals 4 when μ equals 2; or N equals 8 when μ equals 3. For the second UE processing capacity, N equals 2 when μ equals 0; N equals 4 when μ equals 1; N equals 8 when μ equals 2; or N equals 16 when μ equals 3. In some aspects, the UE can apply a single processing capacity (e.g., the first UE processing capacity or the second UE processing capacity) in sidelink congestion control.

[0071] In some aspects, the UE can determine the sidelink CR at time slot n as an additional metric for sidelink congestion control. The sidelink CR can be defined as the total number of subchannels licensed for transmission in time slot [na, n-1] and in time slot [n, n+b] divided by the total number of subchannels configured in the transmission pool at [na, n+b]. Additionally, a and b are positive integers determined by the UE implementation, where a+b+1 equals 1000 or 1000·2. μ Each time slot.

[0072] In some aspects, the UE can be configured with higher-layer parameters for sidelink CR limiting (sl-CR-Limit), and the UE can transmit PSSCH in slot n. In this case, for priority value k, the UE can ensure the following limitation: ∑ i≥k CR(i)≤CR Limit (k), where CR(i) is the CR evaluated in slot nN of the PSSCH transmission for which the "priority" field in SCI is set to i, and CR Limit(k) corresponds to the higher-layer parameter sl-CR-Limit associated with the priority value k and the CBR range, which includes the side-link CBR measured in slot nN, such as Figure 5 As shown. ∑ i≥k CR(i)≤CR Limit The limitation of (k) can be implemented by the UE, which may include the UE dropping one or more transmissions in slot n to satisfy the limitation.

[0073] In some cases, the sidelink quality of service (QoS) management solution within the UE (or sidelink node) may be a function of sidelink congestion control (CBR) and sidelink CR. However, in cases where multiple RATs exist on unlicensed frequency bands, the sidelink RSSI measurement used for sidelink CBR measurement may include transmissions associated with multiple RATs on the unlicensed frequency bands. In some aspects, the presence of both a first RAT and a second RAT may cause the sidelink RSSI measurement used for sidelink CBR measurement to include transmissions associated with both the first RAT and the second RAT. The first RAT may include a WiFi RAT, a new radio uplink / downlink RAT, and / or a Bluetooth RAT, and the second RAT may include a new radio sidelink RAT. Due to the presence of both the first RAT and the second RAT (e.g., interference between the first RAT and the second RAT), the sidelink RSSI and sidelink CBR and / or sidelink CR measured by the second RAT may not accurately represent the sidelink congestion control metric for the UE. Furthermore, when evaluating the sidelink congestion control (CR), the total number of subchannels may include those that the UE cannot transmit in due to first RAT interference, making the measured sidelink CR potentially inaccurate in representing the level of sidelink congestion. In cases of inaccurate understanding of the sidelink congestion control (CBR) and CR due to the presence of first RAT, the UE may incorrectly adjust or fail to adjust the transmission parameters used for sidelink congestion control, negatively impacting UE performance.

[0074] The techniques and apparatus described herein can improve the accuracy of measured sidelink CBR and CR in the presence of first RAT interference by detecting the COT of a first RAT (e.g., a WiFi RAT) and measuring the sidelink CBR and CR outside the COT of the first RAT. Therefore, the measurement accuracy of the UE's sidelink CBR and CR may not be affected by the presence of the first RAT, since the sidelink CBR and CR are measured outside the COT of the first RAT. Furthermore, by accurately understanding the level of sidelink congestion or its absence, the UE can accordingly (e.g., by using an appropriate set of transmission parameters) perform transmissions on the sidelink channel.

[0075] In various aspects of the techniques and apparatus described herein, the UE can measure the sidelink CBR and sidelink CR when it does not detect a COT associated with a first RAT (e.g., a WiFi RAT), which differs from previous solutions that measure the sidelink CBR and sidelink CR within a COT associated with a second RAT (e.g., an NR sidelink RAT). In some aspects described herein, subchannels within a COT associated with the first RAT may not be used for sidelink CBR and sidelink CR measurements associated with the second RAT. In some aspects, for sidelink CBR, the UE can perform sidelink RSSI measurements when it does not detect a COT associated with the first RAT. Additionally, for sidelink CR, the total number of subchannels configured for the UE to perform sidelink CR evaluation may include subchannels in which the UE does not detect a COT associated with the first RAT.

[0076] As pointed out above, Figure 5 This is provided as an example. Other examples may differ from the one provided. Figure 5 The example described.

[0077] Figure 6 This is a schematic diagram illustrating example 600 of congestion control for various radio access technologies on unlicensed frequency bands according to the present disclosure.

[0078] As shown by reference numeral 605 in the accompanying figure, the UE (e.g., UE 120) can identify the Congestion Control Item (COT) associated with a first RAT on an unlicensed frequency band. The UE can be configured to use a second RAT on the unlicensed frequency band and may use the first RAT for communication. In some aspects, the first RAT may be a WiFi RAT, and the COT may be a WiFi COT, and the second RAT may be a new radio-side crosslink RAT. The UE can identify the COT by recognizing the start and end of the COT. The UE can identify the start of the COT at least in part based on detecting the preamble of the packet associated with the first RAT. The UE can identify the end of the COT at least in part based on analyzing the payload of the packet associated with the first RAT. By recognizing the start and end of the COT, the UE can determine the COT, which can be defined as the duration or number of subchannels in the time domain. As described further in detail below, the UE can use the COT to calculate congestion control parameters associated with the second RAT on the unlicensed frequency band.

[0079] In some aspects, the UE can identify the start of COT at least in part based on detecting the preamble of a packet associated with the first RAT. In other words, the first RAT can be used to transmit packets on an unlicensed frequency band, and the transmission of packets on the unlicensed frequency band can be detected by the UE. The preamble may include a Short Training Field (STF), which indicates the start of COT to the UE. The preamble including the STF can be included in the packet header of the packet. When the first RAT corresponds to a WiFi RAT, the preamble may include an 8μs STF and an 8μs Long Training Field (LTF). The STF and / or LTF can indicate the start of a packet to the UE, and thus indicate the start of COT associated with the first RAT.

[0080] The UE can identify the end of the COT at least in part based on detecting the payload of the packet associated with the first RAT. In some aspects, the UE can read the payload and identify the Network Allocation Vector (NAV) (also referred to as NAV information) included in the payload. In some aspects, the NAV may include a duration field specifying the transmission time associated with the packet. In some aspects, the duration field included in the NAV may be defined in microseconds and may be limited to a maximum of 32767 microseconds. Based at least in part on the duration field in the NAV, the UE can determine the end of the packet, and therefore the end of the COT associated with the first RAT.

[0081] In some respects, the UE may determine the COT in part based on the preamble and the NAV included in the payload, whereby the preamble may indicate the start of the COT associated with the first RAT and the NAV may indicate the end of the COT associated with the first RAT.

[0082] In some aspects, the first RAT (e.g., WiFi RAT) and the second RAT (e.g., a new radio-side walkway RAT) may be associated with different digital schemes. A “digital scheme” can refer to the configuration of waveform parameters, where different digital schemes are considered as OFDM-based subframes with different parameters (such as subcarrier spacing / symbol time and / or cyclic prefix (CP) size). As a result of the different digital schemes associated with the first and second RATs, the UE's detection of the preamble and / or packets associated with the first RAT may involve additional complexity or computation. In some aspects, the UE may perform resampling to convert the digital scheme of the first RAT to the digital scheme of the second RAT to detect the payload preamble and / or packets associated with the first RAT.

[0083] As shown by reference numeral 610 in the attached figure, the UE can calculate congestion control parameters associated with a second RAT (e.g., a new radio sidelink RAT) on an unlicensed frequency band. The congestion control parameters can be the sidelink CBR and / or the sidelink CR. In some aspects, the UE can calculate the congestion control parameters by excluding sub-channels in one or more COTs associated with the first RAT (e.g., a WiFi RAT). In other words, the UE can calculate the congestion control parameters at least in part based on the sub-channels associated with the second RAT included in the time window (in addition to the sub-channels in one or more COTs associated with the first RAT).

[0084] In some aspects, to calculate the sidelink CBR, the UE may determine the number of subchannels in the measurement window, excluding subchannels whose RSSI measurements in one or more COTs associated with the first RAT satisfy a threshold. The UE may divide the number of subchannels by the total number of subchannels in the measurement window (excluding subchannels in one or more COTs associated with the first RAT) to determine the sidelink CBR. Each subchannel in one or more COTs may include time-domain and frequency-domain elements, such that each subchannel used to calculate the sidelink CBR may include both time-domain and frequency-domain elements. The time-domain elements used to calculate the sidelink CBR may include the set of symbols (e.g., all symbols) in the time slot configured for the PSCCH or PSSCH (except for the initial symbol or the first symbol of the time slot).

[0085] In some aspects, to calculate the sidelink CR, the UE may determine the number of subchannels authorized, reserved by, or used for UE transmission in the transport pool, excluding subchannels in one or more COTs associated with the first RAT. The UE may divide the number of subchannels by the total number of subchannels in the transport pool (excluding subchannels in one or more COTs associated with the first RAT) to determine the sidelink CR. Each subchannel in one or more COTs may include time-domain and frequency-domain elements, such that each subchannel used to calculate the sidelink CR may include both time-domain and frequency-domain elements. The time-domain element used to calculate the sidelink CR may include the set of symbols (e.g., all symbols) in the time slot configured for the PSCCH or PSSCH (except for the initial or first symbol of the time slot).

[0086] In some aspects, when communicating via unlicensed frequency bands, the UE may apply congestion control parameters (e.g., sidelink CBR and / or sidelink CR). In some aspects, depending on the congestion control parameters, the UE may adjust or limit one or more transmission parameters. Transmission parameters may include the MCS index and MCS table used by the UE, the number of subchannels per transmission by the UE, the number of retransmissions allowed by the UE, the UE's transmission power, and / or CR limits for the UE.

[0087] As described above, the UE (e.g., a first UE) can identify the Congestion Control Parameter (COT) associated with a first Radio Access Point (RAT) (e.g., a WiFi RAT) on an unlicensed frequency band. In some aspects, the first UE can transmit an indication of the COT to a second UE on a sidelink channel. The second UE can receive the indication of the COT associated with the first RAT on the unlicensed frequency band from the first UE via the sidelink channel. The second UE can calculate congestion control parameters (e.g., sidelink CBR and / or sidelink CR) associated with a second RAT (e.g., a new radio sidelink RAT) on the unlicensed frequency band. The second UE can calculate the congestion control parameters by excluding subchannels in the COT associated with the first RAT. The second UE can use the congestion control parameters to communicate via the unlicensed frequency band.

[0088] In some aspects, the first UE can transmit indications of the COT associated with the first RAT on an unlicensed frequency band to multiple UEs on the sidelink channel. Therefore, the first UE that successfully determines accurate COT information can share such information with other UEs, enabling other UEs to perform sidelink CBR and sidelink CR measurements with improved accuracy.

[0089] In some aspects, as described above, the UE can be configured to communicate using a first RAT and a second RAT in an unlicensed frequency band. In some aspects, the first RAT can be a new unlicensed radio RAT, and the second RAT can be a new radio sidelink RAT operating in an unlicensed frequency band. In these aspects, the new radio sidelink RAT can share the medium with a new unlicensed radio RAT deployment (e.g., a Uu interface associated with another operator). In these aspects, the UE can use the techniques described above to determine the COT associated with the first RAT (e.g., the new unlicensed radio RAT), and the UE can calculate congestion control parameters by excluding subchannels in the COT associated with the first RAT. In other words, the UE can exclude subchannels belonging to another new unlicensed radio RAT deployment or operator for congestion control assessment. In some aspects, as described above, the UE can send COT information associated with the first RAT (e.g., the new unlicensed radio RAT) to other UEs, enabling those other UEs to perform sidelink CBR and / or sidelink CR measurements with improved accuracy.

[0090] As pointed out above, Figure 6 This is provided as an example. Other examples may differ from the one provided. Figure 6 The example described.

[0091] Figure 7 This is a schematic diagram illustrating example 700 of congestion control for various radio access technologies on unlicensed frequency bands according to the present disclosure.

[0092] As shown by reference numeral 705 in the attached figure, the UE can identify the COT associated with the first RAT on an unlicensed frequency band. The UE can be configured to use a second RAT on the unlicensed frequency band and may use the first RAT for communication. In some aspects, the first RAT may be a WiFi RAT, and the COT may be a WiFi COT, and the second RAT may be a new radio-side crosslink RAT.

[0093] In some respects, the UE can identify the COT in part by recognizing the start of the COT. As mentioned above, the UE can identify the start of the COT in part based on detecting the preamble of the packet associated with the first RAT. The preamble may include an STF indicating the start of the COT to the UE.

[0094] In some aspects, the UE can detect the preamble of a packet without recognizing or receiving the packet's payload. Therefore, in these aspects, the UE does not detect packets including NAV information to determine the end of the COT, and thus does not determine the COT.

[0095] In some aspects, the UE can determine or infer the end of COT at least in part based on the energy level associated with the unlicensed frequency band related to a threshold. The UE can detect a second energy level associated with the unlicensed frequency band at a first time point associated with a preamble. The UE can detect the second energy level associated with the unlicensed frequency band at a second time point. The UE can determine that the difference between the first energy level and the second energy level detected at a second time point after the first time point satisfies a threshold. The UE can identify the end of COT at least in part based on determining that the difference between the first energy level and the second energy level satisfies a threshold.

[0096] In some aspects, upon receiving a preamble, the UE can detect the energy level associated with the unlicensed frequency band, and the absence of significant energy drops on multiple sub-channels (e.g., energy changes that do not meet thresholds) indicates that a COT still exists for these sub-channels. On the other hand, when the UE detects a significant energy drop in the unlicensed frequency band (e.g., energy changes that meet thresholds), the UE can infer or determine that the corresponding sub-channel (e.g., a sub-channel in the time domain experiencing a significant energy drop) indicates the end of the COT. Therefore, the UE can determine the start of the COT in part based on the energy level associated with the unlicensed frequency band using the preamble and the end of the COT.

[0097] In some aspects, the UE can use COT to calculate congestion control parameters for the second RAT on unlicensed frequency bands, such as regarding Figure 6 Described.

[0098] In some aspects, when the UE does not detect a packet associated with the preamble, the UE may not perform resampling to convert the digital scheme of the first RAT to the digital scheme of the second RAT. In other words, the UE can use the digital scheme associated with the second RAT (e.g., a new radio-side walk-link RAT) to detect the preamble associated with the first RAT (e.g., a WiFi RAT) in the time domain without resampling, which can reduce complexity and computation at the UE.

[0099] In some aspects, the UE (e.g., a first UE) can identify the Congestion Control Parameter (COT) associated with a first Radio Access Point (RAT) (e.g., a WiFi RAT) on an unlicensed frequency band. In some aspects, the first UE can transmit an indication of the COT to a second UE on a sidelink channel. The second UE can receive an indication of the COT associated with the first RAT on the unlicensed frequency band from the first UE via the sidelink channel. The second UE can calculate congestion control parameters (e.g., sidelink CBR and / or sidelink CR) associated with a second RAT (e.g., a new radio sidelink RAT) on the unlicensed frequency band. The second UE can calculate the congestion control parameters by excluding subchannels in the COT associated with the first RAT. The second UE can use the congestion control parameters to communicate via the unlicensed frequency band.

[0100] In some aspects, the first UE can transmit indications of the COT associated with the first RAT on an unlicensed frequency band to multiple UEs on the sidelink channel. Therefore, the first UE that successfully determines accurate COT information can share such information with other UEs, enabling other UEs to perform sidelink CBR and sidelink CR measurements with improved accuracy.

[0101] In some aspects, as described above, the UE can be configured to communicate using a first RAT and a second RAT in an unlicensed frequency band. In some aspects, the first RAT can be a new unlicensed radio RAT, and the second RAT can be a new radio sidelink RAT operating in an unlicensed frequency band. In these aspects, the new radio sidelink RAT can share the medium with a new unlicensed radio RAT deployment (e.g., a Uu interface associated with another operator). In these aspects, the UE can use the techniques described above to determine the COT associated with the first RAT (e.g., the new unlicensed radio RAT), and the UE can calculate congestion control parameters by excluding subchannels in the COT associated with the first RAT. In other words, the UE can exclude subchannels belonging to another new unlicensed radio RAT deployment or operator for congestion control assessment. In some aspects, as described above, the UE can send COT information associated with the first RAT (e.g., the new unlicensed radio RAT) to other UEs, enabling those UEs to perform sidelink CBR and sidelink CR measurements with improved accuracy.

[0102] As pointed out above, Figure 7 This is provided as an example. Other examples may differ from the one provided. Figure 7 The example described.

[0103] Figure 8This is a schematic diagram illustrating an example process 800 performed by a UE, for example, in accordance with this disclosure. Example process 800 is an example in which a UE (e.g., UE 120) performs operations associated with congestion control for various radio access technologies on unlicensed frequency bands.

[0104] like Figure 8 As shown, in some aspects, process 800 may include: identifying one or more COTs associated with a first RAT on an unlicensed frequency band (block 810). For example, a UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may identify one or more COTs associated with a first RAT on an unlicensed frequency band, as described above.

[0105] like Figure 8 As further shown, in some aspects, process 800 may include: calculating congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding one or more sub-channels in a COT (block 820). For example, a UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may calculate congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding one or more sub-channels in a COT, as described above.

[0106] like Figure 8 As further shown, in some aspects, process 800 may include: using congestion control parameters to communicate via an unlicensed frequency band (block 830). For example, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may use congestion control parameters to communicate via an unlicensed frequency band, as described above.

[0107] Process 800 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0108] In the first aspect, the congestion control parameters are calculated at least in part based on sub-channels included in the time window, in addition to sub-channels in one or more COTs.

[0109] In the second aspect, either alone or in combination with the first aspect, one or more COTs are identified at least in part based on a preamble associated with the first RAT, a block associated with the first RAT, or a combination thereof.

[0110] In the third aspect, identifying a COT in one or more COTs, either alone or in combination with one or more of the first and second aspects, includes: identifying the start of the COT based at least in part on detecting the preamble of a packet associated with the first RAT; and identifying the end of the COT based at least in part on detecting the payload of a packet associated with the first RAT.

[0111] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the first RAT is a Wi-Fi RAT, the preamble includes a short training field indicating the start of the COT, and the payload includes a network assignment vector indicating the duration of the COT.

[0112] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, detecting the payload of the packet associated with the first RAT includes: performing resampling to convert the digital scheme of the first RAT into the digital scheme of the second RAT.

[0113] In the sixth aspect, identifying a COT in one or more COTs, either alone or in combination with one or more of the first to fifth aspects, includes: identifying the start of the COT at least in part based on detecting a preamble of a packet associated with a first RAT; detecting a first energy level associated with an unlicensed frequency band at a first time associated with the preamble; determining that the difference between the first energy level and a second energy level detected at a second time after the first time satisfies a threshold; and identifying the end of the COT at least in part based on determining that the difference between the first energy level and the second energy level satisfies a threshold.

[0114] In the seventh aspect, either alone or in combination with one or more of the first to sixth aspects, process 800 includes: sending an instruction to one or more wireless communication devices for one or more COTs.

[0115] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the first RAT is the Wi-Fi RAT, and the second RAT is the New Radio RAT.

[0116] In the ninth aspect, either alone or in combination with one or more of the first to eighth aspects, the first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio sidelink RAT.

[0117] In the tenth aspect, either alone or in combination with one or more aspects from the first to the ninth aspect, the congestion control parameter is at least one of channel busy rate or channel occupancy rate.

[0118] In the eleventh aspect, either alone or in combination with one or more aspects from the first to the tenth aspects, the congestion control parameter is the channel busy rate, which is calculated at least in part based on the following operations: determining the number of subchannels in the measurement window whose received signal strength indicator measurement satisfies a threshold, excluding one or more subchannels in the COT; and dividing the number of subchannels by the total number of subchannels in the measurement window excluding one or more subchannels in the COT.

[0119] In the twelfth aspect, either alone or in combination with one or more aspects from the first to the eleventh aspects, the congestion control parameter is a channel occupancy rate, which is calculated at least in part based on: determining the number of subchannels in the transmission pool that are authorized to, reserved by, or used by the UE for transmission by the UE, excluding subchannels in one or more COTs; and dividing the number of subchannels by the total number of subchannels in the transmission pool that are excluding subchannels in one or more COTs.

[0120] In the thirteenth aspect, either alone or in combination with one or more aspects from the first to the twelfth aspects, each subchannel in one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

[0121] In the fourteenth aspect, either alone or in combination with one or more of the first to thirteenth aspects, the time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

[0122] In the fifteenth aspect, either alone or in combination with one or more aspects from the first to the fourteenth aspects, the second RAT is a side-link RAT.

[0123] Although Figure 8 An example box of process 800 is shown, but in some aspects, process 800 may include... Figure 8 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 800 may be executed in parallel.

[0124] Figure 9This is a schematic diagram illustrating an example process 900 performed, for example, by a first UE according to this disclosure. Example process 900 is an example in which a UE (e.g., UE 120) performs operations associated with congestion control of various radio access technologies on an unlicensed frequency band.

[0125] like Figure 9 As shown, in some aspects, process 900 may include receiving from a second UE via a sidelink channel an indication of one or more COTs associated with a first RAT on an unlicensed frequency band (block 910). For example, the first UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, controller / processor 280, and / or memory 282) may receive from the second UE via a sidelink channel an indication of one or more COTs associated with a first RAT on an unlicensed frequency band, as described above.

[0126] like Figure 9 As further shown, in some aspects, process 900 may include: calculating congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding one or more sub-channels in a COT (block 920). For example, a UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280, and / or memory 282) may calculate congestion control parameters associated with a second RAT on an unlicensed frequency band, wherein the congestion control parameters are calculated by excluding one or more sub-channels in a COT, as described above.

[0127] like Figure 9 As further shown, in some aspects, process 900 may include: using congestion control parameters to communicate via an unlicensed frequency band (block 930). For example, the UE (e.g., using antenna 252, demodulator 254, MIMO detector 256, receive processor 258, transmit processor 264, TX MIMO processor 266, modulator 254, controller / processor 280 and / or memory 282) may use congestion control parameters to communicate via an unlicensed frequency band, as described above.

[0128] Process 900 may include additional aspects, such as any single aspect or any combination thereof described below and / or in conjunction with one or more other process descriptions elsewhere described herein.

[0129] In the first aspect, the congestion control parameters are calculated at least in part based on sub-channels included in the time window, in addition to sub-channels in one or more COTs.

[0130] In the second aspect, either alone or in combination with the first aspect, the first RAT is a Wi-Fi RAT, and the second RAT is a new radio RAT.

[0131] In the third aspect, either alone or in combination with one or more of the first and second aspects, the first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio sidelink RAT.

[0132] In the fourth aspect, either alone or in combination with one or more of the first to third aspects, the congestion control parameter is at least one of channel busy rate or channel occupancy rate.

[0133] In the fifth aspect, either alone or in combination with one or more of the first to fourth aspects, the congestion control parameter is the channel busy rate, which is calculated at least in part based on the following operations: determining the number of subchannels in the measurement window whose received signal strength indicator measurements satisfy a threshold, excluding one or more subchannels in the COT; and dividing the number of subchannels by the total number of subchannels in the measurement window excluding one or more subchannels in the COT.

[0134] In the sixth aspect, either alone or in combination with one or more aspects from the first to the fifth aspects, the congestion control parameter is the channel occupancy rate, which is calculated at least in part based on the following operations: determining the number of subchannels in the transmission pool that are authorized to, reserved by, or used by the UE for transmission by the UE, excluding subchannels in one or more COTs; and dividing the number of subchannels by the total number of subchannels in the transmission pool that are excluding subchannels in one or more COTs.

[0135] In the seventh aspect, either alone or in combination with one or more aspects from the first to the sixth aspects, each subchannel in one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

[0136] In the eighth aspect, either alone or in combination with one or more of the first to seventh aspects, the time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

[0137] In the ninth aspect, either alone or in combination with one or more aspects from the first to the eighth aspects, the second RAT is a side-link RAT.

[0138] Although Figure 9 An example box of process 900 is shown, but in some aspects, process 900 may include... Figure 9 The boxes depicted in the diagram are compared to additional boxes, fewer boxes, different boxes, or boxes arranged in a different manner. Alternatively, two or more boxes in process 900 may be executed in parallel.

[0139] The following provides a summary of some aspects of this disclosure:

[0140] Aspect 1: A method of wireless communication performed by a user equipment (UE), comprising: identifying one or more channel occupancy times (COTs) associated with a first radio access technology (RAT) on an unlicensed frequency band; calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and using the congestion control parameters to communicate via the unlicensed frequency band.

[0141] Aspect 2: According to the method of aspect 1, wherein the congestion control parameters are calculated at least in part based on sub-channels included in the time window other than the sub-channels in the one or more COTs.

[0142] Aspect 3: The method according to any one of Aspects 1 to 2, wherein the one or more COTs are identified at least in part based on a preamble associated with the first RAT, a block associated with the first RAT, or a combination thereof.

[0143] Aspect 4: The method according to any one of Aspects 1 to 3, wherein identifying a COT in one or more COTs comprises: identifying the start of the COT at least in part based on detecting the preamble of a packet associated with the first RAT; and identifying the end of the COT at least in part based on detecting the payload of the packet associated with the first RAT.

[0144] Aspect 5: According to the method of aspect 4, wherein the first RAT is a Wi-Fi RAT, the preamble includes a short training field indicating the start of the COT, and the payload includes a network allocation vector indicating the duration of the COT.

[0145] Aspect 6: According to the method of aspect 4, wherein detecting the payload of the packet associated with the first RAT includes: performing resampling to convert the digital scheme of the first RAT into the digital scheme of the second RAT.

[0146] Aspect 7: The method according to any one of Aspects 1 to 6, wherein identifying a COT in one or more COTs comprises: identifying the start of the COT at least in part based on detecting a preamble of a packet associated with the first RAT; detecting a first energy level associated with the unlicensed frequency band at a first time associated with the preamble; determining that the difference between the first energy level and a second energy level detected at a second time after the first time satisfies a threshold; and identifying the end of the COT at least in part based on determining that the difference between the first energy level and the second energy level satisfies the threshold.

[0147] Aspect 8: The method according to any one of aspects 1 to 7 further includes: sending an instruction to one or more wireless communication devices for the one or more COTs.

[0148] Aspect 9: The method according to any one of Aspects 1 to 8, wherein the first RAT is a Wi-Fi RAT and the second RAT is a new radio RAT.

[0149] Aspect 10: The method according to any one of Aspects 1 to 9, wherein the first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio side downlink RAT.

[0150] Aspect 11: The method according to any one of Aspects 1 to 10, wherein the congestion control parameter is at least one of channel busy rate or channel occupancy rate.

[0151] Aspect 12: The method according to any one of Aspects 1 to 11, wherein the congestion control parameter is a channel busy rate, the channel busy rate being calculated at least in part based on: determining the number of subchannels excluding subchannels in the one or more COTs that satisfy a threshold for the received signal strength indicator measurement for that measurement window; and dividing the number of subchannels by the total number of subchannels excluding subchannels in the one or more COTs in the measurement window.

[0152] Aspect 13: The method according to any one of Aspects 1 to 12, wherein the congestion control parameter is a channel occupancy rate, the channel occupancy rate being calculated at least in part based on: determining the number of subchannels in the transmission pool that are authorized to, reserved by, or used by the UE for transmission by the UE, excluding subchannels in the one or more COTs; and dividing the number of subchannels by the total number of subchannels in the transmission pool that are excluding subchannels in the one or more COTs.

[0153] Aspect 14: The method according to any one of Aspects 1 to 13, wherein each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

[0154] Aspect 15: The method according to aspect 14, wherein the time-domain component includes all symbols in a time slot configured for a physical-side crosslink control channel or a physical-side crosslink shared channel, except for the initial symbol of the time slot.

[0155] Aspect 16: The method according to any one of Aspects 1 to 15, wherein the second RAT is a side link RAT.

[0156] Aspect 17: A method of wireless communication performed by a first user equipment (UE), comprising: receiving from a second UE via a sidelink channel an indication of one or more channel occupancy times (COTs) associated with a first radio access technology (RAT) on an unlicensed frequency band; calculating congestion control parameters associated with a second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding subchannels in the one or more COTs; and using the congestion control parameters to communicate via the unlicensed frequency band.

[0157] Aspect 18: The method according to aspect 17, wherein the congestion control parameters are calculated at least in part based on sub-channels included in the time window other than the sub-channels in the one or more COTs.

[0158] Aspect 19: The method according to any one of Aspects 17 to 18, wherein the first RAT is a Wi-Fi RAT and the second RAT is a new radio RAT.

[0159] Aspect 20: The method according to any one of Aspects 17 to 19, wherein the first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio side downlink RAT.

[0160] Aspect 21: The method according to any one of Aspects 17 to 20, wherein the congestion control parameter is at least one of channel busy rate or channel occupancy rate.

[0161] Aspect 22: The method according to any one of Aspects 17 to 21, wherein the congestion control parameter is a channel busy rate, the channel busy rate being calculated at least in part based on: determining the number of subchannels excluding the one or more COTs that satisfy a threshold for the received signal strength indicator measurement for that measurement window; and dividing the number of subchannels by the total number of subchannels excluding the one or more COTs in the measurement window.

[0162] Aspect 23: The method according to any one of Aspects 17 to 22, wherein the congestion control parameter is a channel occupancy rate, the channel occupancy rate being calculated at least in part based on: determining the number of subchannels in the transmission pool that are authorized to, reserved by, or used by the UE for transmission by the UE, excluding subchannels in the one or more COTs; and dividing the number of subchannels by the total number of subchannels in the transmission pool that are excluding subchannels in the one or more COTs.

[0163] Aspect 24: The method according to any one of Aspects 17 to 23, wherein each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

[0164] Aspect 25: The method according to aspect 24, wherein the time-domain component includes all symbols in a time slot configured for a physical-side crosslink control channel or a physical-side crosslink shared channel, except for the initial symbol of the time slot.

[0165] Aspect 26: The method according to any one of Aspects 17 to 25, wherein the second RAT is a side link RAT.

[0166] Aspect 27: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 1-16.

[0167] Aspect 28: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more of aspects 1-16.

[0168] Aspect 29: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 1-16.

[0169] Aspect 30: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in accordance with one or more of aspects 1-16.

[0170] Aspect 31: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 1-16.

[0171] Aspect 32: An apparatus for wireless communication at a device, comprising: a processor; a memory coupled to the processor; and instructions stored in the memory and executable by the processor to cause the apparatus to perform the method according to one or more of aspects 17-26.

[0172] Aspect 33: An apparatus for wireless communication, comprising a memory and one or more processors coupled to the memory, the memory and the one or more processors being configured to perform the method according to one or more aspects of aspects 17-26.

[0173] Aspect 34: An apparatus for wireless communication, comprising at least one unit for performing the method according to one or more of aspects 17-26.

[0174] Aspect 35: A non-transitory computer-readable medium storing code for wireless communication, said code including instructions executable by a processor to perform the methods described in one or more of aspects 17-26.

[0175] Aspect 36: A non-transitory computer-readable medium storing a set of instructions for wireless communication, the set of instructions comprising one or more instructions which, when executed by one or more processors of a device, cause the device to perform the method according to one or more aspects of aspects 17-26.

[0176] The foregoing disclosure provides explanations and descriptions, but is not intended to be exhaustive or to limit the aspects to the precise form disclosed. Modifications and variations may be made based on the foregoing disclosure, or modifications and variations may be derived from practice in the aspects.

[0177] As used herein, the term "component" is intended to be interpreted broadly as hardware and / or a combination of hardware and software. Whether referred to as software, firmware, middleware, microcode, hardware description language, or other names, "software" should be interpreted broadly as instructions, instruction sets, code, code segments, program code, programs, subroutines, software modules, applications, software applications, software packages, routines, subroutines, objects, executable files, threads of execution, procedures and / or functions, and other examples. As used herein, processors are implemented using hardware and / or a combination of hardware and software. It will be apparent that the systems and / or methods described herein can be implemented using various forms of hardware and / or combinations of hardware and software. The actual specialized control hardware or software code used to implement these systems and / or methods is not a limitation in any respect. Therefore, the operation and behavior of systems and / or methods are described herein without referencing specific software code—it is to be understood that software and hardware can be designed to implement systems and / or methods, at least in part, based on the descriptions herein.

[0178] As used in this article, depending on the context, satisfying the threshold can refer to a value greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, etc.

[0179] Even if a specific combination of features is recited in the claims and / or disclosed in the specification, such combinations are not intended to limit the disclosure of the aspects. In fact, many of these features can be combined in ways that are not specifically recited in the claims and / or specifically disclosed in the specification. While each dependent claim listed below may directly depend on only one claim, the disclosure of an aspect includes a combination of each dependent claim with every other claim in the claim set. As used herein, the phrase “at least one of” in the list of items refers to any combination of those items, including single members. For example, “at least one of a, b, or c” is intended to 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).

[0180] None of the elements, actions, or instructions used herein should be construed as critical or necessary unless explicitly stated otherwise. Furthermore, as used herein, the articles “a” and “an” are intended to include one or more items and are interchangeable with “one or more.” Furthermore, as used herein, the article “the” is intended to include one or more items referenced in combination with the article “the” and is interchangeable with “one or more.” Furthermore, as used herein, the terms “set” and “group” are intended to include one or more items (e.g., related items, unrelated items, or a combination of related and unrelated items) and are interchangeable with “one or more.” Where only one item is anticipated, the phrase “only one” or similar language is used. Furthermore, as used herein, the terms “has,” “have,” “having,” etc., are intended to be open-ended terms. Furthermore, unless explicitly stated otherwise, the phrase “based on” is intended to mean “at least partially based on.” Furthermore, as used herein, the term “or” is intended to be inclusive when used in a series and may be used interchangeably with “and / or” unless otherwise expressly stated (e.g., if used in conjunction with “any” or “only one of”).

Claims

1. 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 to: Identify one or more Channel Occupancy Time (COT) associated with the first Radio Access Technology (RAT) on an unlicensed frequency band; Calculate congestion control parameters associated with the second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and Use the congestion control parameters to communicate via the unlicensed frequency band. The congestion control parameter is at least one of channel busy rate or channel occupancy rate. The channel busy rate is calculated at least in part based on the following operations: Determine the number of first sub-channels, excluding those in one or more COTs, that satisfy the threshold measured by the received signal strength indicator in the measurement window; and Divide the first number of sub-channels by the total number of sub-channels in the measurement window that excludes the sub-channels in the one or more COTs, or The channel occupancy rate is calculated, at least in part, based on the following operations: Determine the number of second subchannels, excluding subchannels in one or more COTs, that are authorized to, reserved by, or used for transmission by the UE in the transmission pool; and Divide the number of the second sub-channel by the total number of sub-channels in the transmission pool, excluding the sub-channels in the one or more COTs.

2. The UE according to claim 1, wherein, The one or more COTs are identified at least in part based on the preamble associated with the first RAT, the block associated with the first RAT, or a combination thereof.

3. The UE according to claim 1, wherein, When identifying a COT in one or more COTs, the one or more processors are configured to: The start of the COT is identified at least in part based on detecting the preamble of the packet associated with the first RAT; and The end of the COT is identified at least in part based on detecting the payload of the packet associated with the first RAT.

4. The UE according to claim 3, wherein, The first RAT is a Wi-Fi RAT, the preamble includes a short training field indicating the start of the COT, and the payload includes a network allocation vector indicating the duration of the COT.

5. The UE according to claim 3, wherein, When detecting the payload of the packet associated with the first RAT, the one or more processors are configured to perform resampling to convert the digital scheme of the first RAT into the digital scheme of the second RAT.

6. The UE according to claim 1, wherein, When identifying a COT in one or more COTs, the one or more processors are configured to: The start of the COT is identified at least in part based on detecting the preamble of the packet associated with the first RAT; Detect a first energy level associated with the unlicensed frequency band at a first time point associated with the preamble; Determine that the difference between the first energy level and the second energy level detected at a second time after the first time satisfies a threshold. as well as The end of the COT is identified at least in part based on determining that the difference between the first energy level and the second energy level satisfies the threshold.

7. The UE according to claim 1, wherein, The one or more processors are also configured to send an instruction to the one or more COTs to one or more wireless communication devices.

8. The UE according to claim 1, wherein, The first RAT is a Wi-Fi RAT, and the second RAT is a new radio RAT.

9. The UE according to claim 1, wherein, The first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio side downlink RAT.

10. The UE according to claim 1, wherein, Each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

11. The UE according to claim 10, wherein, The time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

12. The UE according to claim 1, wherein, The second RAT is the side link RAT.

13. 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 to: Receive from the second UE via a side link channel an indication of one or more Channel Occupancy Time (COT) associated with a first Radio Access Technology (RAT) on an unlicensed frequency band; Calculate congestion control parameters associated with the second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and Use the congestion control parameters to communicate via the unlicensed frequency band. The congestion control parameter is at least one of channel busy rate or channel occupancy rate. The channel busy rate is calculated at least in part based on the following operations: Determine the number of first sub-channels, excluding those in one or more COTs, that satisfy the threshold measured by the received signal strength indicator in the measurement window; and Divide the first number of sub-channels by the total number of sub-channels in the measurement window that excludes the sub-channels in the one or more COTs, or The channel occupancy rate is calculated, at least in part, based on the following operations: Determine the number of second subchannels, excluding subchannels in one or more COTs, that are authorized to, reserved by, or used for transmission by the UE in the transmission pool; and Divide the number of the second sub-channel by the total number of sub-channels in the transmission pool, excluding the sub-channels in the one or more COTs.

14. The first UE according to claim 13, wherein, Each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

15. The first UE according to claim 14, wherein, The time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

16. A method for wireless communication performed by a user equipment (UE), comprising: Identify one or more Channel Occupancy Time (COT) associated with the first Radio Access Technology (RAT) on an unlicensed frequency band; Calculate congestion control parameters associated with the second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and Use the congestion control parameters to communicate via the unlicensed frequency band. The congestion control parameter is at least one of channel busy rate or channel occupancy rate. The channel busy rate is calculated at least in part based on the following operations: Determine the number of first sub-channels, excluding those in one or more COTs, that satisfy the threshold measured by the received signal strength indicator in the measurement window; and Divide the first number of sub-channels by the total number of sub-channels in the measurement window that excludes the sub-channels in the one or more COTs, or The channel occupancy rate is calculated, at least in part, based on the following operations: Determine the number of second subchannels, excluding subchannels in one or more COTs, that are authorized to, reserved by, or used for transmission by the UE in the transmission pool; and Divide the number of the second sub-channel by the total number of sub-channels in the transmission pool, excluding the sub-channels in the one or more COTs.

17. The method according to claim 16, wherein, The one or more COTs are identified at least in part based on the preamble associated with the first RAT, the block associated with the first RAT, or a combination thereof.

18. The method according to claim 16, wherein, Identifying the COT in one or more COTs includes: The start of the COT is identified at least in part based on detecting the preamble of the packet associated with the first RAT; and The end of the COT is identified at least in part based on detecting the payload of the packet associated with the first RAT.

19. The method according to claim 18, wherein, The first RAT is a Wi-Fi RAT, the preamble includes a short training field indicating the start of the COT, and the payload includes a network allocation vector indicating the duration of the COT.

20. The method according to claim 18, wherein, Detecting the payload of the packet associated with the first RAT includes performing resampling to convert the digital scheme of the first RAT to the digital scheme of the second RAT.

21. The method according to claim 16, wherein, Identifying the COT in one or more COTs includes: The start of the COT is identified at least in part based on detecting the preamble of the packet associated with the first RAT; Detect a first energy level associated with the unlicensed frequency band at a first time point associated with the preamble; Determine that the difference between the first energy level and the second energy level detected at a second time after the first time satisfies a threshold; and The end of the COT is identified at least in part based on determining that the difference between the first energy level and the second energy level satisfies the threshold.

22. The method of claim 16, further comprising: Send an instruction to one or more wireless communication devices for the one or more COTs.

23. The method according to claim 16, wherein, The first RAT is a Wi-Fi RAT, and the second RAT is a new radio RAT.

24. The method of claim 16, wherein, The first RAT is a new radio uplink / downlink RAT, and the second RAT is a new radio side downlink RAT.

25. The method according to claim 16, wherein, Each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

26. The method according to claim 25, wherein, The time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

27. The method according to claim 16, wherein, The second RAT is the side link RAT.

28. A method for wireless communication performed by a first user equipment (UE), comprising: Receive from the second UE via a side link channel an indication of one or more Channel Occupancy Time (COT) associated with a first Radio Access Technology (RAT) on an unlicensed frequency band; Calculate congestion control parameters associated with the second RAT on the unlicensed frequency band, wherein the congestion control parameters are calculated by excluding sub-channels in the one or more COTs; and Use the congestion control parameters to communicate via the unlicensed frequency band. The congestion control parameter is at least one of channel busy rate or channel occupancy rate. The channel busy rate is calculated at least in part based on the following operations: Determine the number of first sub-channels, excluding those in one or more COTs, that satisfy the threshold measured by the received signal strength indicator in the measurement window; and Divide the first number of sub-channels by the total number of sub-channels in the measurement window that excludes the sub-channels in the one or more COTs, or The channel occupancy rate is calculated, at least in part, based on the following operations: Determine the number of second subchannels, excluding subchannels in one or more COTs, that are authorized to, reserved by, or used for transmission by the UE in the transmission pool; and Divide the number of the second sub-channel by the total number of sub-channels in the transmission pool, excluding the sub-channels in the one or more COTs.

29. The method according to claim 28, wherein, Each subchannel in the one or more COTs includes a time-domain component and a frequency-domain component, and wherein each subchannel used to calculate the congestion control parameters includes a time-domain component and a frequency-domain component.

30. The method according to claim 29, wherein, The time-domain component includes all symbols in the time slots configured for the physical-side crosslink control channel or the physical-side crosslink shared channel, except for the initial symbol of the time slot.

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