Resource allocation with sensing of long term evolution (LTE) and new radio (NR) sidelink

Abstract

A UE, including an Internet of Vehicles (V2X) device, other user equipment (UE), a baseband processor, or other network device, may perform sensing on candidate resources on an LTE sidelink resource pool of a long term evolution (LTE) sidelink channel and an NR resource pool of a new radio (NR) sidelink channel, the candidate resource is used for sidelink (SL) communication on the NR sidelink channel based on a sensing result of the sensing of the candidate resource. According to the sensing result, the SL communication may be transmitted on the NR sidelink channel based on an LTE candidate resource of the LTE sidelink channel and an NR candidate resource of the NR sidelink channel in co-channel coexistence.

Description

Technical Field

[0001] The present disclosure relates to a wireless technology including sensed resource selection with a Long Term Evolution (LTE) side link and a New Radio (NR) side link. Background Art

[0002] Mobile communications in the next generation wireless communication system 5G or New Radio (NR) networks will provide ubiquitous connectivity and access to information and the ability to share data around the world. 5G networks and network slices will be unified, service-based frameworks that will target common and sometimes conflicting performance standards to provide services to extremely diverse application domains ranging from enhanced mobile broadband (eMBB) to massive machine type communications (mMTC), ultra-reliable low latency communications (URLLC), and other communications. Generally speaking, NR will evolve based on the third generation partnership project (3GPP) long term evolution (LTE) advanced technology and additional enhanced radio access technologies (RATs) to achieve seamless and faster wireless connectivity solutions. Another type of mobile communication includes vehicle communications, in which vehicles transmit or exchange vehicle-related information. Vehicle communications may include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-pedestrian (V2P), in which direct communications without base stations may be adopted, such as in sidelink (SL) communications.

[0003] In some cases, the vehicle-related information is intended for a single vehicle or other entity. In other cases, such as emergency alerts, the vehicle-related information is intended for a large number of vehicles or other entities. Emergency alerts may include collision warnings, loss of control warnings, etc.

[0004] V2X communications and associated applications provide ever-increasing potential benefits for safety between vehicles and pedestrian devices, which may include one or more of the following: bicyclists, children pushed in strollers / puffer carriages, walkers, joggers, people boarding trains and buses, drivers, passengers, or more with mobile devices. V2X communications can ensure that vehicles with adequate safety components and applications and other devices such as pedestrian user equipment (P-UE) are sufficiently aware of each other to avoid, for example, collisions. BRIEF DESCRIPTION OF THE DRAWINGS

[0005] Figure 1 An exemplary block diagram illustrating an example of a user equipment (UE) that can be used in conjunction with various embodiments (aspects) described herein, the UE being communicatively coupled with a network component as a peer device via a network.

[0006] Figure 2 Diagrams are shown that illustrate example components of devices that may be employed in accordance with various aspects discussed herein.

[0007] Figure 3 An example simplified block diagram of a user equipment (UE) wireless communication device or other network device / component (e.g., eNB, gNB) according to various aspects is shown.

[0008] Figure 4 An example full sensing and selection window timeline is shown in accordance with various aspects.

[0009] Figure 5 Another example partial sensing and selection window timeline in accordance with various aspects is shown.

[0010] Figure 6 An example process flow for resource allocation selection according to various aspects is shown.

[0011] Figure 7 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0012] Figure 8 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0013] Fig. 9 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0014] Fig.10 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0015] Fig.11 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0016] Fig.12 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown.

[0017] Fig.13 Another example process flow for resource allocation selection for co-channel coexistence with LTE SL and NR SL according to various aspects is shown. DETAILED DESCRIPTION

[0018] The following detailed description refers to the accompanying drawings. The same figure numbers in different drawings may identify the same or similar features, elements, operations, etc. In addition, the present disclosure is not limited to the following description, because other specific implementations can be utilized and structural or logical changes can be made without departing from the scope of the present disclosure.

[0019] The present invention describes various aspects of a user equipment (UE) device that operates in a side link (SL) communication and selects resources to implement SL communication. The UE device may be a pedestrian UE (P-UE) device, a vehicle-to-everything (V2X) device, or other UE that may include vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) device communication, or other direct communication between UEs (which may include side link (SL) communication); each transmitter and receiver may include a user equipment (UE) device. When referred to herein, the UE may include any of these devices and may also include, for example, a roadside unit (RSU), a drone, other vehicle devices, an Internet of Things (IoT) device, or other user equipment devices.

[0020] Power saving and latency are important considerations when utilizing SL communications, which can be direct communications between UE terminals (e.g., a transmitter UE and a receiver UE in a unicast transmission). Specifically, because safety-related traffic requires low latency, uplink and downlink communications through base stations may not necessarily meet latency requirements in certain situations (e.g., emergency messaging or other emergency situations). Therefore, sidelink communications can be configured for direct communications between UEs such as autonomous vehicles, pedestrian UEs, etc.

[0021] Currently, LTE side link (SL) communication and NR SL communication are configured by two different mechanisms with two different SL channels, although some processes are shared, such as autonomous resource allocation for both LTE SL and NR SL. However, LTE SL and NR SL do not necessarily share the same channel, and therefore, co-channel coexistence is not configured by frequency division multiplexing (FDM) or time division multiplexing (TDM). Specifically, for some V2X network configurations (for example, ITS (Intelligent Transport System) bandwidth is limited for cellular V2X). Because SL resources (especially for ITS bands) may be limited, there is a need for LTE SL and NR SL to share the same resources of two frequency / time resources in a configuration known as co-channel coexistence. Therefore, various aspects of this document configure and enable NR SL and LTE SL to dynamically share the same time and frequency resources in co-channel coexistence of SL.

[0022] Two different types of NR sidelink communication categories can be implemented based on the configured resource allocation method: Mode-1 communication and Mode-2 communication. NR Mode-1 communication includes a method in which a base station (e.g., gNB or eNB) allocates available resources for direct communication between terminals (different UEs) and can be used when all terminals performing sidelink communication are within coverage. NR Mode-2 communication is a method in which each UE or terminal selects available resources for direct communication (e.g., SL communication) and can be used even when the terminal is out of coverage. Because the base station does not intervene in the resource allocation for Mode-2 communication, the UE identifies the available resources itself.

[0023] In LTE SL, Mode-4 is similar to NR Mode-2 communication, where the UE senses and selects resources for SL communication without allocation from the base station. Sensing is used to identify resources available for the sidelink in order to decode the Physical Sidelink Control Channel (PSCCH) during a sensing window of a certain period before performing SL transmission. This enables, for example, SL channels to coexist fairly with other UEs. In response to acquiring the SL channel and selecting resources, the UE may provide Sidelink Control Information (SCI) to the receiver UE; further enabling the receiver UE to respond on the SL channel.

[0024] In one aspect, a UE (e.g., a V2X UE or other UE having processing circuitry and memory) may be configured to perform sensing on a candidate resource on an LTE side link resource pool associated with an LTE side link channel and on an NR resource pool associated with an NR side link channel, the candidate resource being used for side link (SL) communication based on a sensing result of the sensing of the candidate resource. The UE may then send SL communication on a side link channel (e.g., an NR SL channel) based on selected LTE candidate resources of an LTE side link channel coexisting on the side link channel and selected LTE candidate resources of an NR side link channel. The sensing of the NR side link resource pool may be based on a sensing result of an LTE side link resource pool that overlaps with the NR side link resource pool in time and frequency. A side link resource selection process may be performed for NR side link data to be sent based on a higher priority of the sensing result associated with the LTE side link resource pool. Alternatively or additionally, the NR side link resource pool may have a higher priority than the LTE side link resource pool.

[0025] Aspects include processes for supporting co-channel coexistence between an LTE side link and an NR side link (SL). Specifically, the NR SL may be in Mode-2 SL operation and the LTE SL may be in Mode-4 operation; therefore, the UE's NR SL resource allocation may take into account the LTE SL resource reservation. Additionally or alternatively, the NR SL may be in Mode-1 SL operation and the LTE SL may be in Mode-4 operation; therefore, the NR SL UE may report LTE sensing results to the base station.

[0026] In one aspect, sensing operations performed on candidate resources on an LTE side link resource pool of an LTE side link channel may be performed during an LTE sensing window, and sensing operations may be performed on candidate resources on an NR side link resource pool of an NR side link channel that coexists with the LTE side link channel during an NR sensing window. The LTE sensing window may be configured for full sensing operations or partial sensing operations in the LTE side link channel, and the NR sensing window may be configured for full sensing operations or partial sensing operations in the NR side link channel. When partial sensing is used, power consumption may be reduced to the extent that decoding time is reduced. According to aspects of the present invention, sensing operations on an LTE resource pool may be based on sensing results on an LTE resource pool, and vice versa.

[0027] In one example, the UE may perform a full sensing operation in the NR sidelink channel during the NR sensing window and in the LTE sidelink channel during the LTE sensing window based on the overlapping time and resources between the LTE sidelink resource pool and the NR sidelink resource pool. The NR sensing window may be based on the initial NR time slot (n) that triggers the NR sidelink resource selection process, the side link (SL) sensing window parameters of the preconfigured one or more time slots, and the processing time (T proc,0 ), where n may be an integer. The LTE sensing window may be based on an LTE logical or physical subframe (n') corresponding to an initial NR time slot (n), a frequency division duplex (FDD) / time division duplex configuration parameter, and a predefined positive integer or in-device coordination time between the LTE side link module component and the NR side link module component.

[0028] Figure 1 1 is an example network 100 according to one or more implementations described herein. Example network 100 may include UE 110-1, UE 110-2, etc. (collectively referred to as "UE 110" and individually referred to as "UE 110"), a radio access network (RAN) 120, a core network (CN) 130, an application server 140, and an external network 150.

[0029] The systems and devices of the example network 100 may operate in accordance with one or more communication standards, such as the 2nd Generation (2G), 3rd Generation (3G), 4th Generation (4G) (e.g., Long Term Evolution (LTE)), or 5th Generation (5G) (e.g., New Radio (NR)) communication standards of the 3rd Generation Partnership Project (3GPP). Additionally or alternatively, one or more of the systems and devices of the example network 100 may operate in accordance with other communication standards and protocols discussed herein, including future versions or generations of 3GPP standards (e.g., 6th Generation (6G) standards, 7th Generation (7G) standards, etc.), Institute of Electrical and Electronics Engineers (IEEE) standards (e.g., Wireless Metropolitan Area Networks (WMAN), Worldwide Interoperability for Microwave Access (WiMAX), etc.), and more.

[0030] As shown, UE 110 may include a smart phone (e.g., a handheld touch screen mobile computing device that can be connected to one or more wireless communication networks). Additionally or alternatively, UE 110 may include other types of mobile or non-mobile computing devices capable of wireless communication, such as a personal data assistant (PDA), a pager, a laptop computer, a desktop computer, a wireless handset, etc. In some specific implementations, UE 110 may include an Internet of Things (IoT) device (or IoT UE), smart glasses on extended reality (XR), and a vehicle UE or vehicle device entity, including vehicle-to-everything (V2X) devices, vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), and vehicle-to-pedestrian (V2P) devices, etc. The vehicle device entity may also include a roadside unit (RSU), which is an entity that supports V2I and is implemented in an eNodeB or a stationary / non-stationary UE / IoT that includes any of one or more components / circuits described herein. Such a UE may include a network access layer designed for low-power applications that utilize short-term UE connections. Additionally or alternatively, the IoT UE may utilize one or more types of technologies such as machine-to-machine (M2M) communication or machine-type communication (MTC) (e.g., to exchange data with an MTC server or other device via a public land mobile network (PLMN), proximity services (ProSe) or device-to-device (D2D) communication, sensor networks, IoT networks, and more. Depending on the scenario, the M2M or MTC exchange of data may be a machine-initiated exchange, and the IoT network may include IoT UEs (which may include uniquely identifiable embedded computing devices within the Internet infrastructure) interconnected with ephemeral connections. In some scenarios, the IoT UE may execute background applications (e.g., keep-alive messages, status updates, etc.) to facilitate connectivity to the IoT network.

[0031] UE 110 may communicate and establish a connection (e.g., communicatively coupled) with RAN 120, which may involve one or more radio channels 114-1 and 114-2, each of which may include a physical communication interface / layer. In some implementations, the UE may be configured with dual connectivity (DC) as a multi-radio access technology (multi-RAT) or multi-radio dual connectivity (MR-DC), where a UE capable of multiple receptions and transmissions (Rx / Tx) may use resources provided by different network nodes (e.g., 122-1 and 122-2), which may be connected via a non-ideal backhaul (e.g., where one of the network nodes provides NR access and the other network node provides E-UTRA for LTE or NR access for 5G). In such a scenario, one network node may act as a master node (MN) and the other node may act as a secondary node (SN). The MN and the SN may be connected via a network interface, and at least the MN may be connected to CN 130. In addition, at least one of the MN or SN may operate with shared spectrum channel access, and the functionality specified for UE 110 may be used for an integrated access and backhaul mobile terminal (IAB-MT). Similar to UE 110, the IAB-MT may access the network using one network node or using two different nodes with an enhanced dual connectivity (EN-DC) architecture, a new radio dual connectivity (NR-DC) architecture, or other direct connections such as a sidelink communication channel as SL interface 112.

[0032] The NR SL physical layer of the SL interface 112 may include several physical channels and signals. The SL physical channel is a collection of resource elements that carry information of higher layers of the protocol stack. The SL physical channel may include a physical sidelink broadcast channel (PSBCH) that carries the SL-BCH transport channel, where the master information block (MIB) for the SL is periodically transmitted (every 160ms) and includes system information for UE-to-UE communication (e.g., SL TDD configuration, in-coverage flag). The PSBCH is sent in the S-SSB together with the sidelink primary synchronization signal / sidelink secondary synchronization signal (S-PSS / SSS). The SL physical channel may also include a physical sidelink feedback channel (PSFCH) for sending HARQ feedback from a receiver UE to a transmitter UE (or initiating UE) on the SL for unicast or multicast communication. The physical sidelink shared channel (PSSCH) and the physical sidelink control channel (PSCCH) may be configured so that each PSSCH containing a transport block (i.e., user data traffic) is associated with the PSCCH. The PSCCH may be transmitted on the same time slot as the PSSCH and contains control information about the shared channel.

[0033] In some implementations, a base station (as described herein) may be an example of a network node 122. As shown, the UE 110 may also or alternatively be connected to an access point (AP) 116 via a connection interface 118, which may include an air interface that enables the UE 110 to be communicatively coupled to the AP 116. The AP 116 may include a wireless local area network (WLAN), a WLAN node, a WLAN termination point, etc. The connection 1207 may include a local wireless connection, such as a connection consistent with any IEEE 702.11 protocol, and the AP 116 may include a wireless fidelity router or other AP. Figure 1 110 , but AP 116 may be connected to another network (e.g., the Internet) without being connected to RAN 120 or CN 130. In some scenarios, UE 110, RAN 120, and AP 116 may be configured to utilize LTE-WLAN aggregation (LWA) technology or LTE WLAN radio level technology integrated with IPsec tunnel (LWIP). LWA may involve UE 110 in RRC_CONNECTED state being configured by RAN 120 to utilize radio resources of LTE and WLAN. LWIP may involve UE 110 using WLAN radio resources (e.g., connection interface 118) via an IPsec protocol tunnel to authenticate and encrypt packets (e.g., Internet Protocol (IP) packets) communicated through connection interface 118. IPsec tunneling may include encapsulating the entire original IP packet and adding a new packet header, thereby protecting the original header of the IP packet.

[0034] The RAN 120 may include one or more RAN nodes 122-1 and 122-2 (collectively, RAN nodes 122, and individually, RAN nodes 122) that enable establishment of channels 114-1 and 114-2 between the UE 110 and the RAN 120. The RAN node 122 may include a network access point configured to provide a radio baseband function for data and / or voice connections between a user and a network based on one or more of the communication technologies described herein (e.g., 2G, 3G, 4G, 5G, WiFi, etc.). Thus, as an example, the RAN node may be an E-UTRAN Node B (e.g., an enhanced Node B, eNodeB, eNB, 4G base station, etc.), a next generation base station (e.g., a 5G base station, an NR base station, a next generation eNB (gNB), etc.). The RAN node 122 may include a roadside unit (RSU), a transmit receive point (TRxP or TRP), and one or more other types of base stations. In some scenarios, the RAN node 122 may be a dedicated physical device, such as a macrocell base station or a low power (LP) base station for providing a femtocell, picocell or other similar cell with a smaller coverage area, smaller user capacity or higher bandwidth than a macrocell.

[0035] Some or all of the RAN nodes 122 may be implemented as one or more software entities running on a server computer as part of a virtual network that may be referred to as a centralized RAN (CRAN) or a virtual baseband unit pool (vBBUP). In these specific implementations, the CRAN or vBBUP may implement a RAN functional split, such as a packet data convergence protocol (PDCP) split, where the radio resource control (RRC) and PDCP layers may be operated by the CRAN / vBBUP, and other layer 2 (L2) protocol entities may be operated by individual RAN nodes 122; a medium access control (MAC) / physical (PHY) layer split, where the RRC, PDCP, radio link control (RLC), and MAC layers may be operated by the CRAN / vBBUP, and the PHY layer may be operated by individual RAN nodes 122; or a "lower PHY" split, where the RRC, PDCP, RLC, MAC layer, and upper portions of the PHY layer may be operated by the CRAN / vBBUP, and the lower portions of the PHY layer may be operated by individual RAN nodes 122. The virtualization framework may allow idle processor cores of the RAN node 122 to perform or execute other virtualized applications.

[0036] In some implementations, the individual RAN nodes 122 may represent individual gNB distributed units (DUs) connected to a gNB control unit (CU) via respective F1 interfaces. In such implementations, the gNB-DU may include one or more remote radio heads or radio frequency (RF) front end modules (RFEMs), and the gNB-CU may be operated by a server (not shown) located in the RAN 120 or by a server pool (e.g., a group of servers configured to share resources) in a manner similar to CRAN / vBBUP. Additionally or alternatively, one or more of the RAN nodes 122 may be next generation eNBs (i.e., gNBs) that may provide Evolved Universal Terrestrial Radio Access (E-UTRA) user plane and control plane protocol terminations to the UE 110 and may be connected to the 5G core network (5GC) 130 via an NG interface.

[0037] Any of the RAN nodes 122 may serve as an endpoint for an air interface protocol and may be a first point of contact for the UE 110. In some implementations, any of the RAN nodes 122 may perform various logical functions of the RAN 120, including but not limited to functions of a radio network controller (RNC), such as radio bearer management, uplink and downlink dynamic radio resource management, and data packet scheduling, and mobility management. The UE 110 may be configured to communicate with each other or any of the RAN nodes 122 over a multi-carrier communication channel using orthogonal frequency division multiplexing (OFDM) communication signals according to various communication techniques, such as but not limited to OFDMA communication techniques (e.g., for downlink communications) or single carrier frequency division multiple access (SC-FDMA) communication techniques (e.g., for uplink and ProSe or sidelink (SL) communications), although the scope of such implementations may not be limited in this respect. An OFDM signal may include a plurality of orthogonal subcarriers.

[0038] In some implementations, a downlink resource grid may be used for downlink transmissions from any of the RAN nodes 122 to the UE 110, and similar techniques may be used for uplink transmissions. The grid may be a time-frequency grid (e.g., a resource grid or a time-frequency resource grid) that represents the physical resources for the downlink in each time slot. Such a time-frequency plane representation is common for OFDM systems, which makes radio resource allocation intuitive. Each column and each row of the resource grid corresponds to an OFDM symbol and an OFDM subcarrier, respectively. The duration of the resource grid in the time domain corresponds to a time slot in a radio frame. The smallest time-frequency unit in the resource grid is represented as a resource element. Each resource grid includes resource blocks, which describe the mapping of certain physical channels to resource elements. Each resource block may include a set of resource elements (REs); in the frequency domain, this may represent the minimum amount of resources that can currently be allocated. Such resource blocks are used to transmit several different physical downlink channels.

[0039] In addition, the RAN node 122 may be configured to wirelessly communicate with the UE 110 or another UE over a licensed medium (also referred to as a "licensed spectrum" or "licensed band"), an unlicensed shared medium (also referred to as an "unlicensed spectrum" or "unlicensed band"), or a combination thereof. For example, a licensed spectrum may include channels operating within a frequency range, while an unlicensed spectrum may include a 5 GHz band or higher. A licensed spectrum may correspond to a channel or frequency band that is selected, reserved, regulated, etc. for certain types of wireless activities (e.g., wireless telecommunications network activities), while an unlicensed spectrum may correspond to one or more frequency bands that are not restricted for certain types of wireless activities. Whether a particular frequency band corresponds to a licensed medium or an unlicensed medium may depend on one or more factors, such as frequency allocations determined by a public sector organization (e.g., a government agency, a regulatory agency, etc.) or by a private sector organization involved in developing wireless communication standards and protocols.

[0040] To operate in the unlicensed spectrum, the UE 110 and the RAN node 122 may operate using NR unlicensed (NR-U), license assisted access (LAA), eLAA, or feLAA mechanisms. In these specific implementations, the UE 110 and the RAN node 122 may perform one or more known medium sensing operations or carrier sensing operations to determine whether one or more channels in the unlicensed spectrum are unavailable or otherwise occupied before transmitting in the unlicensed spectrum. The medium / carrier sensing operations may be performed according to a listen-before-talk (LBT) protocol or a clear channel assessment (CCA). Category 4 CCA / LBT may be a full or complete CCA compared to a shorter CCA such as a single and / single CCA or other CCAs (e.g., CAT 1CCA or CAT 2CCA) for sensing whether a channel is busy / reserved or available for acquisition for communication.

[0041] The LAA mechanism can be built on the carrier aggregation (CA) technology of the LTE-Advanced system. In CA, each aggregated carrier is called a component carrier (CC). In some cases, each CC may have a different bandwidth from other CCs. In a time division duplex (TDD) system, the number of CCs and the bandwidth of each CC may be the same for DL ​​and UL. CA also includes individual service cells to provide individual CCs. The coverage of the service cells may be different, for example, because CCs on different frequency bands will experience different path losses. The primary service cell or PCell can provide a primary component carrier (PCC) for both UL and DL, and can handle RRC and non-access stratum (NAS) related activities. Other service cells are called SCells, and each SCell can provide a single secondary component carrier (SCC) for both UL and DL. SCCs can be added and removed as needed, and changing PCCs may require UE 110 to undergo switching. In LAA, eLAA, and feLAA, some or all of the SCells may operate in an unlicensed spectrum (referred to as "LAA SCell"), and the LAA SCell is assisted by the PCell operating in the licensed spectrum. When a UE is configured with more than one LAA SCell, the UE may receive UL grants on the configured LAA SCells, indicating different PUSCH starting positions within the same subframe.

[0042] The PDSCH may carry user data and higher layer signaling to the UE 110. A physical downlink control channel (PDCCH) may carry, among other things, information about a transport format and resource allocation related to the PDSCH channel. The PDCCH may also inform the UE 110 about transport formats, resource allocations, and hybrid automatic repeat request (HARQ) information related to uplink shared channels. Typically, downlink scheduling (e.g., allocating control and shared channel resource blocks to the UE 110-2 within the cell) may be performed on any of the RAN nodes 122 based on channel quality information fed back from any of the UEs 110. Downlink resource allocation information may be transmitted on the PDCCH for (e.g., allocated to) each of the UEs 110.

[0043] PDCCH uses control channel elements (CCEs) to convey control information, where many CCEs (e.g., 6, etc.) can be composed of resource element groups (REGs), where REGs are defined as physical resource blocks (PRBs) in OFDM symbols. Before being mapped to resource elements, PDCCH complex-valued symbols may first be organized into quaternions, which may then be arranged, for example, using a sub-block interleaver for rate matching. Each PDCCH may be sent using one or more of these CCEs, where each CCE may correspond to nine sets of four physical resource elements, referred to as REGs. Four quadrature phase shift keying (QPSK) symbols may be mapped to each REG. Depending on the size of the DCI and channel conditions, one or more CCEs may be used to send the PDCCH. Four or more different PDCCH formats may be defined in LTE with different numbers of CCEs (e.g., aggregation levels, L=1, 2, 4, 8, or 16).

[0044] Some implementations may use the concept of resource allocation for control channel information, which is an extension of the above concept. For example, some implementations may utilize an extended (E)-PDCCH that uses PDSCH resources for control information transmission. One or more ECCEs may be used to send EPDCCH. Similar to the above, each ECCE may correspond to nine sets of four physical resource elements, referred to as EREGs. In some cases, an ECCE may have other numbers of EREGs.

[0045] The RAN nodes 122 may be configured to communicate with each other via an interface 123. In a specific implementation where the system is an LTE system, the interface 123 may be an X2 interface. The X2 interface may be defined between two or more RAN nodes 122 (e.g., two or more eNBs / gNBs or a combination thereof) connected to an evolved packet core (EPC) or CN 130, and / or between two eNBs connected to the EPC. In some specific implementations, the X2 interface may include an X2 user plane interface (X2-U) and an X2 control plane interface (X2-C). The X2-U may provide a flow control mechanism for user data packets transmitted over the X2 interface, and may be used to transmit information about the delivery of user data between eNBs or gNBs. For example, X2-U may provide specific sequence number information about user data transmitted from a master eNB (MeNB) to a secondary eNB (SeNB); information about successful in-sequence delivery of PDCP packet data units (PDUs) from the SeNB to the UE 110 for user data; information about PDCP PDUs that are not delivered to the UE 110; information about the current minimum expected buffer size at the SeNB for sending user data to the UE; etc. X2-C may provide intra-LTE access mobility functions (e.g., including context transfer from a source eNB to a target eNB, user plane transmission control, etc.), load management functions, and inter-cell interference coordination functions.

[0046] As shown, the RAN 120 may be connected to (e.g., communicatively coupled to) the CN 130 via a next generation (NG) interface 124. The NG interface 124 may be divided into two parts: a next generation (NG) user plane (NG-U) interface 128, which carries traffic data between the RAN node 122 and the user plane function (UPF); and an S1 control plane (NG-C) interface 126, which is a signaling interface between the RAN node 122 and the access and mobility management function (AMF). The core network CN 130 may also be a 5G core network (5GC) 220.

[0047] The CN 130 may include a plurality of network elements 132 configured to provide various data and telecommunication services to customers / subscribers (e.g., users of the UE 110) connected to the CN 130 via the RAN 120. In some implementations, the CN 130 may include an evolved packet core (EPC), a 5G CN, or one or more additional or alternative types of CNs. The components of the CN 130 may be implemented in one physical node or separate physical nodes, including components for reading and executing instructions from a machine-readable or computer-readable medium (e.g., a non-transitory machine-readable storage medium). In some implementations, network function virtualization (NFV) may be used to virtualize any or all of the above-described network node roles or functions via executable instructions stored in one or more computer-readable storage media (described in further detail below). A logical instance of the CN 130 may be referred to as a network slice, and a logical instance of a portion of the CN 130 may be referred to as a network sub-slice. Network Function Virtualization (NFV) architecture and infrastructure can be used to virtualize one or more network functions onto physical resources including a combination of industry-standard server hardware, storage hardware, or switches (alternatively performed by proprietary hardware). In other words, the NFV system can be used to perform a virtual or reconfigurable implementation of one or more EPC components / functions.

[0048] As shown, CN 130, application server 140 and external network 150 can be connected to each other through interfaces 134, 136 and 138, which may include IP network interfaces. Application server 140 may include one or more server devices or network elements (e.g., virtual network functions (VNFs) that provide applications that use IP bearer resources through CM 130 (e.g., universal mobile telecommunications system packet service (UMTS PS) domain, LTE PS data service, etc.). Application server 140 may also or alternatively be configured to support one or more communication services (e.g., voice over IP (VoIP sessions, push-to-talk (PTT) sessions, group communication sessions, social networking services, etc.)) of UE 110 via CN 130. Similarly, external network 150 may include one or more of various networks, including the Internet, thereby providing network access to various additional services, information, interconnectivity and other network features to mobile communication networks and UE 110.

[0049] Figure 2Example components of a device 200 according to some aspects are shown. In some aspects, the device 200 may include application circuitry 202, baseband circuitry 204, radio frequency (RF) circuitry 206, front end module (FEM) circuitry 208, one or more antennas 210, and power management circuitry (PMC) 212 (coupled together at least as shown). The components of the illustrated device 200 may be included in a UE or a RAN node. In some aspects, the device 200 may include fewer elements (e.g., a RAN node may not utilize application circuitry 202, but instead include a processor / controller to process IP data received from a CN (e.g., 5GC 120 or Evolved Packet Core (EPC))).

[0050] The application circuitry 202 may include one or more application processors. For example, the application circuitry 202 may include circuitry such as, but not limited to, one or more single-core or multi-core processors. The processor may include any combination of general-purpose processors and special-purpose processors (e.g., graphics processors, application processors, etc.). The processor may be coupled to or may include a memory / storage device that may be configured to execute instructions stored in the memory / storage device to enable various applications or operating systems to run on the device 200.

[0051] The baseband circuit 204 may include circuits such as, but not limited to, one or more single-core or multi-core processors. The baseband circuit 204 may include one or more baseband processors or control logic components to process baseband signals received from the receive signal path of the RF circuit 206 and generate baseband signals for the transmit signal path of the RF circuit 206. The baseband processing circuit 204 may interact with the application circuit 202 to generate and process baseband signals and control the operation of the RF circuit 206. For example, in some aspects, the baseband circuit 204 may include a third generation (3G) baseband processor 204A, a fourth generation (4G) baseband processor 204B, a fifth generation (5G) baseband processor 204C, or other baseband processors 204D for other existing generations, generations in development, or generations to be developed in the future (e.g., second generation (2G), sixth generation (6G), etc.). The baseband circuit 204 (e.g., one or more baseband processors 204A-D) may handle various radio control functions that may communicate with one or more radio networks via the RF circuit 206. In other aspects, some or all of the functionality of the baseband processors 204A-D may be included in a module stored in the memory 204G and executed via the central processing unit 204E. The memory 204G may include executable components or instructions to cause one or more processors (e.g., the baseband circuit 204) to perform aspects, processes, or operations herein. Radio control functions may include, but are not limited to, signal modulation / demodulation, encoding / decoding, radio frequency shifting, etc. In some aspects, the modulation / demodulation circuitry of the baseband circuit 204 may include fast Fourier transform (FFT), pre-coding, or constellation mapping / demapping functions. In some aspects, the encoding / decoding circuitry of the baseband circuit 204 may include convolution, tail-biting convolution, turbo, Viterbi, or low-density parity check (LDPC) encoder / decoder functions. The aspects of modulation / demodulation and encoder / decoder functions are not limited to these examples, and in other aspects may include other suitable functions.

[0052] In some aspects, the baseband circuitry 204 may include one or more audio digital signal processors (DSPs) 204F. The audio DSPs 204F may include elements for compression / decompression and echo cancellation, and in other aspects may include other suitable processing elements. In some aspects, the components of the baseband circuitry may be appropriately combined in a single chip, in a single chipset, or disposed on the same circuit board. In some aspects, some or all of the constituent components of the baseband circuitry 204 and the application circuitry 202 may be implemented together, such as, for example, on a system on a chip (SOC).

[0053] In some aspects, the baseband circuitry 204 may provide communications compatible with one or more radio technologies. For example, in some aspects, the baseband circuitry 204 may support communications with NG-RAN, Evolved Universal Terrestrial Radio Access Network (EUTRAN) or other wireless metropolitan area network (WMAN), wireless local area network (WLAN), wireless personal area network (WPAN), NR-U network, etc. Aspects in which the baseband circuitry 204 is configured to support radio communications of more than one wireless protocol may be referred to as multi-mode baseband circuitry.

[0054] RF circuit 206 can communicate with a wireless network through a non-solid medium using modulated electromagnetic radiation. In various aspects, RF circuit 206 may include switches, filters, amplifiers, etc. to facilitate communication with a wireless network. RF circuit 206 may include a receive signal path, which may include circuits that down-convert RF signals received from FEM circuit 208 and provide baseband signals to baseband circuit 204. RF circuit 206 may also include a transmit signal path, which may include circuits that up-convert baseband signals provided by baseband circuit 204 and provide RF output signals to FEM circuit 208 for transmission.

[0055] In some aspects, the receive signal path of the RF circuit 206 may include a mixer circuit 206a, an amplifier circuit 206b, and a filter circuit 206c. In some aspects, the transmit signal path of the RF circuit 206 may include a filter circuit 206c and a mixer circuit 206a. The RF circuit 206 may also include a synthesizer circuit 206d for synthesizing the frequencies used by the mixer circuit 206a of the receive signal path and the transmit signal path. In some aspects, the mixer circuit 206a of the receive signal path may be configured to down-convert the RF signal received from the FEM circuit 208 based on the synthesized frequency provided by the synthesizer circuit 206d. The amplifier circuit 206b may be configured to amplify the down-converted signal, and the filter circuit 206c may be a low pass filter (LPF) or a band pass filter (BPF) configured to remove unwanted signals from the down-converted signal to generate an output baseband signal. The output baseband signal may be provided to the baseband circuit 204 for further processing. In some aspects, the output baseband signal can be a zero frequency baseband signal, although this is not required.In some aspects, the mixer circuit 206a of the receive signal path can include a passive mixer, although the scope of the various aspects is not limited in this respect.

[0056] refer to Figure 3, a block diagram of a user equipment (UE) device or another network device / component (e.g., V-UE / P-UE, IoT, gNB, eNB, or other participating network entity / component) is shown. The UE device 300 includes: one or more processors 310 (e.g., one or more baseband processors), the one or more processors including processing circuits and associated interfaces; transceiver circuits 320 (e.g., including RF circuits, the RF circuits may include transmitter circuits (e.g., associated with one or more transmit chains) or receiver circuits (e.g., associated with one or more receive chains), the transmitter circuits and receiver circuits may use common circuit elements, different circuit elements, or a combination thereof); and a memory 330 (which may include any of a variety of storage media and may store instructions or data associated with one or more of the processors 310 or the transceiver circuits 320).

[0057] Memory 330 (and other memory components discussed herein, such as memory, data storage, etc.) may include one or more machine-readable media containing instructions, which, when executed by a machine or component herein, cause the machine or other device to perform the actions of the method or device or system for communicating using multiple communication technologies according to the aspects, embodiments, and examples described herein. It should be understood that the aspects described herein may be implemented by hardware, software, firmware, or any combination thereof. When implemented in software, the function may be stored as one or more instructions or codes on a computer-readable medium (e.g., a memory or other storage device described herein) or sent via a computer-readable medium. Computer-readable media include both computer storage media and communication media, which include any media that facilitates transferring a computer program from one place to another. Storage media or computer-readable storage devices may be any available media that can be accessed by a general-purpose computer or a special-purpose computer. By way of example only and not limitation, such computer-readable media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage devices, magnetic disk storage devices or other magnetic storage devices or other tangible or non-transient media that can be used to carry or store required information or executable instructions. Moreover, any connection may also be referred to as a computer-readable medium.

[0058] The memory 330 may include executable instructions that may be coupled in or communicatively to the processor or processing circuit 310. For example, the memory may include performing sensing on a candidate resource on an LTE side link resource pool of an LTE side link channel and an NR resource pool of an NR side link channel, the candidate resource being used for SL communication on an NR SL channel based on a sensing result of the sensing of the candidate resource. The communication / transceiver circuit 320 may also send SL communication on the NR side link channel based on a set of LTE candidate resources for the LTE side link channel in co-channel coexistence and a set of NR candidate resources for the NR side link channel according to the sensing result.

[0059] In one aspect, the UE / gNB device 300 is operable to be configured in the following manner: based on unequal protection between different transport blocks (TBs) in a physical layer encapsulation (e.g., EPC packets, transmission opportunities, MCOTs, single transmission bursts, TTIs, or other encapsulation protocols or related encapsulation parameters used to encapsulate data from higher layers (e.g., MAC layers) into frames for air transmission, to process / generate / encode / decode physical (PHY) layer transmissions to / from higher layers including multiple different TBs. The physical (PHY) layer transmissions may be received, transmitted, or provided by the communication / transmitter circuit 320 to similarly process / generate physical layer transmissions with the spatial layer via a physical channel in an NR network or other network.

[0060] The processor or processing circuit 310 can be a component of an application / processing circuit or a processor of a baseband circuit, which can be used to execute components or elements of one or more instances of a protocol stack. For example, in one aspect, the processor 310 of the baseband circuit, alone or in combination with the processing circuit, can be configured to a receiver UE (e.g., 110-2 or other UE) for NR Mode-2 SL communication or LTE Mode-4 SL communication. Because NR Mode-2 SL communication and LTE Mode-4 communication include SL communication in which the base station does not intervene in resource allocation, the processing circuit 310 can further perform a set of candidate resources (or candidate resource sets (S A )) resource selection process, and further making at least a subset of candidate resources in the set of candidate resources meet a threshold (e.g., reference signal received power (RSRP) or similar power threshold). For example, the candidate resource set (S A ) or a threshold amount (in terms of percentage, ratio, or number) of a subset of candidate resources may be equal to the total number of candidate resources (S M ) overlap. After ensuring that the threshold is met, a report of the candidate resource set can be sent from the PHY layer to a higher layer (e.g., the MAC layer) to enable SL communication. In addition, a full sensing window or partial sensing with a partial sensing window can be configured as part of the resource selection process. Various aspects can also consider when the candidate resource set (S A) is below a threshold.

[0061] Figure 4 Example timing of a sensing and selection process 400 according to various aspects is shown. In 5G NR Mode-2 SL communication, the base station does not intervene in the resource selection process of the UE or terminal node, so each UE selects its own available resources. Each UE performs a sensing process 402 by decoding the PSCCH to determine which resources are not occupied by other terminals. Resource sensing 402 can be performed by a UE (e.g., UE 110-1 as a transmitting UE to a receiving UE 110-2) before data is sent, or before the transmitting UE sends / reports to the receiver UE, which can be from the PHY layer to higher layers (e.g., MAC layer or higher layers outside) for LTE SL and NR SL communications in co-channel coexistence, where time and frequency resources are shared or overlapped by both in one SL channel.

[0062] In the example timing of the sensing and selection process 400, the length of the sensing window 402 is set to 1100ms, but can be larger or smaller (e.g., 100ms) as a complete or full sensing window based on the resource pool configuration. The timing of the sensing and selection process 400 corresponds to full sensing, which can be primarily applied to various UEs (e.g., V-UEs or other UEs) that impose less stringent restrictions on power consumption on the UE, but is not limited to any particular UE. "T" represents the timing corresponding to the start of the selection window. The sensing window 402 starts at time T-1100ms, that is, 1100ms before T.

[0063] During the sensing window 402 period, each terminal undergoes a sensing process of decoding the PSCCH resource blocks being used by all UEs in the area. Therefore, resource sensing 402 can be used to identify occupied resources (e.g., as indicated by shaded resources / resource blocks) and exclude these occupied resource blocks from a candidate resource set (or a set of candidate resources). If the UE does not monitor some resources, these resources may also be unavailable. After obtaining the candidate resource set through the sensing process 402, the resource blocks to be used for data transmission are selected during the selection window 404 by subtracting the excluded or unavailable resources from the total candidate resources. Through this process, even if the base station does not allocate resource blocks, for example, UE 110-1 can identify the resource blocks being used by all other terminals, and thus prevent conflicts by selecting appropriate resource candidates for SL communication (e.g., as indicated in the resource blocks marked with slashes). Here, at least a subset of the NR SL candidate resources among the reported candidate resources may be determined to overlap with the LTE SL candidate resources, such as by enabling resource selection details for SL communication with co-channel coexistence of LTE SL and NR SL based on a partial sensing method and in parallel with the corresponding protocol in 3GPP.

[0064] Figure 5 An example timing of a partial sensing / reduced sensing and selection process 500 according to various aspects is shown. Sensing is performed only for a partial sensing window 502 (e.g., 40ms or other partial period) of the entire or full observation period of 200ms as full sensing, which is a smaller portion or partial window of full sensing (e.g., sensing window 402 or other window time greater than the partial period). "T" represents the timing of the start of a resource selection window (RSW) 504. Here, for example, sensing at each UE is performed only for 40ms, corresponding to a time interval from T-1100ms to T-160ms. As an example, because PSCCH decoding is performed only for 40ms (T-1100ms to T-160ms), RSW 504 can be reduced to 40ms (from T to T+40ms).

[0065] One purpose of partial sensing is to enable the UE to perform sensing with reduced power consumption for efficiency. The power consumption of the UE may be directly associated with the duration of sensing, so reducing the sensing duration (i.e., performing partial sensing) may achieve power savings. However, if the sensing duration is extremely shortened, system performance may be degraded. Therefore, partial sensing also allows UE110-1, for example, as a transmitting UE in sidelink communication, to avoid selecting some resources reserved by other UEs and may not always be able to detect any reserved resources with higher periodicity (e.g., control channel elements (CCE) or CCE candidates, subframes, bandwidth, frequency, transmit opportunities, number of antenna ports, orthogonal frequency division symbols, other resources or resource parameters), which may share the same selection window.

[0066] Example protocols that may be standardized by 3GPP include resource allocation procedures as described throughout the present disclosure, wherein both LTE SL resources of an LTE channel co-existing with the LTE channel and NR SL resources of an NR channel are sensed on a single SL channel, such as for NR SL data transmission or other data. Sensing for candidate resources may be performed by UE 110-1, for example, on an LTE sidelink resource pool for an LTE sidelink channel during an LTE sensing window, and on an NR sidelink resource pool for an NR sidelink channel co-existing with the LTE sidelink channel during an NR sensing window. The sLTE sensing window may be configured for full sensing operations or partial sensing operations in the LTE sidelink channel, and the NR sensing window may be configured for full sensing operations or partial sensing operations in the NR sidelink channel to provide SL transmissions (e.g., NR data transmissions, sidelink control information (SCI) transmissions, or other data) via SL transmissions based on these various aspects including sensing on both the LTE SL and the NR SL.

[0067] Although the method described in the present disclosure is shown and described as a series of actions or events in this article, it should be understood that the order of such actions or events shown should not be interpreted as having a limiting meaning. For example, some actions can occur in different orders or simultaneously with other actions or events other than those shown or described in this article. In addition, it may not be necessary for all the actions shown to implement one or more aspects or embodiments of this specification. In addition, one or more actions in the actions depicted herein may be performed in one or more separate actions or stages. For ease of description, reference may be made to the above-mentioned accompanying drawings. However, the method is not limited to any specific embodiment, aspect or example provided in the present disclosure, and can be applied to any one of the systems / devices / components disclosed herein.

[0068] Figure 6An example processing flow 600 of a sensing and resource candidate selection process 600 according to various aspects is shown. NR V2X UE SL communication can be configured with two different resource allocation modes, namely Mode 1 and Mode 2 resource allocation schemes. For the Mode 2 resource allocation scheme, a transmitting UE (e.g., UE 110-1) selects sidelink transmission resources based on its own sensing and resource selection process. For example, previously, the UE did not necessarily consider the SL from the Rx UE 110-2, so that side information was not reported from the Rx UE 110-2. However, UE 110-1 as a transmitting UE can be configured to receive a report from the receiving UE 110-2 to select some resources, or operate based on its own sensing and SL resource pool. In NR V2X, UE 110-1 can operate a resource selection process that includes identifying a set of candidate resources.

[0069] In 5G NR Mode-2 SL communication and in LTE Mode-4 SL communication, the base station 120 does not intervene in the resource selection process of the UE or terminal node, so each UE selects its own available resources. In contrast, NR Mode-1 communication receives resource allocations from the base station 120. In NR Mode-2 and LTE Mode-4 SL communication, each UE performs a sensing process 600 by decoding the PSCCH to determine which resources are not occupied by other terminals. Resource sensing 602 is performed before data is sent, or before a UE (e.g., UE 110-1) sends to a receiver UE (e.g., UE 110-2), which may be from a PHY layer to a higher layer (e.g., a MAC layer or a higher layer).

[0070] In the example timing of the sensing and selection process flow 600, at 610, UE 110-1 obtains an initial RSRP threshold (or measurement threshold), which may be based on the quality of service (QoS) of the sidelink data to be transmitted. The sensing window is used to monitor resources from other UEs and perform sidelink received signal strength indicator (S-RSSI) / RSRP measurements to select the most appropriate resource within the selection window for use in SL communication.

[0071] At 620, process flow 600 includes, when UE 110-1 obtains data to be transmitted and is triggered to determine resources within the window, determining that there are candidate resources M. total The total number S Mresource selection window. The determination may be based on the total number (M) of sidelink candidate resources within a period, a timing window, or the time of potential candidate resources. The PHY layer of the transmitting UE 110-1 determines the parameters of the resource selection window of the RSW (e.g., RSW 504 or other window) and the total number of candidate resources in the window, which may be represented as M. The RSW may be represented, for example, as [n+T1, n+T2], where n may be the time of the resource selection slot, and T1 is the start slot time offset and T2 is the end slot time offset. The sensing window may be configured for sensing before the RSW (e.g., 504) decodes the PSCCH, and may be a partial sensing window or a full sensing window, for example, depending on mode 2 for NR sensing and mode 4 for LTE sensing whether it is in sidelink co-channel coexistence.

[0072] At 630, the initial candidate resource set S A Can be initialized to include all resources in the resource selection window. A Here, all resources in the timing resource selection window can be set as a candidate resource set / a set of candidate resources, denoted as S A , or referred to as an initial candidate set of all resources in the resource selection window (eg, 504).

[0073] At 640, UE 110-1 may select from a set of candidate resources S A Candidate resources for which UE 110-1 has not sensed resources in a sensed resource window with a configured resource reservation period before the candidate time slot are excluded. Here, the UE may identify resources for which resource reservation information is unknown whether it is associated at the time slot.

[0074] At 650, UE 110-1 may select from a set of candidate resources S A 1 may exclude candidate resources from the candidate resource set S, which may be based on the reservation of the candidate resources by another UE. Here, the transmitting UE 110-1 excludes resources by determining whether other UEs have reserved resources, such as by decoding the SCI sent by other UEs to determine whether there is an associated reservation. If UE 110-1 detects that some resources have been reserved by another UE by performing a sensing operation, UE 110-1 may exclude resources from the candidate resource set S. Aexcluding those reserved resources, in particular those excluded by another UE having an RSRP threshold greater than the RSRP threshold used for the resource selection process flow. The transmissions received by UE 110-1 may occupy resources that are periodically allocated and may be projected onto some resources within the UE (re)selection window (n) (e.g., window 504). Therefore, because the UE (e.g., 110-1) knows that these resources are occupied by its reception of these transmissions, UE 110-1 may be operable to exclude these resources from, for example, a set of resource candidates (e.g., a data set storage or other storage) reserved for retransmission by another UE device or network component. UE 110-1 may independently process each partial sensing window allocated, for example, within a period of a few seconds, a few milliseconds (ms), or other complete sensing window. Therefore, if multiple partial sensing windows are configured within the configured sensing window, UE 110-1 may independently process each of them, detecting all corresponding resource reservation periods and corresponding resources to be excluded from use when selecting resources and generating SL transmissions.

[0075] Additionally or alternatively, UE 110-1 may evaluate whether other UEs are transmitting above an RSRP threshold, which may also depend on the data priority level of the reserved SCI. If another UE is very close to the transmitting UE 110-1, the associated signal strength will be greater; and therefore, if the same resource is selected, it may cause large interference from the reservation of other UEs. UE 110-1 may utilize the RSRP threshold to check the RSRP measurement of the resource.

[0076] At 660, UE 110-1 may determine a set of candidate resources S A Is the number of resources in less than X*M? total or X*S M , where X can be, for example, a positive integer or a percentage. If the result of the determination is "yes", then at 670, UE 110-1 can increase the RSRP threshold (e.g., by 3 dB) and repeat 630 to 650. For example, UE 110-1 can determine whether any of the remaining resources are available and whether the remaining resources are a certain percentage of the total number of resources, and re-execute processes 630 to 650 in another iteration by increasing the RSRP threshold; thus, given the exclusion of some resources and potentially making the candidate resource set S A Once the total number of resources S M If X percentage of the candidate resource set is within the candidate set, UE 110-1 may report the candidate result to a higher layer for random resource selection. In other words, if “no” is the determination at 680, UE 110-1 may report the candidate resource set S to a higher layer. A .

[0077] refer to Figure 7 , an example process flow 700 for resource allocation in the presence of sensing an LTE sidelink channel and an NR sidelink channel according to various aspects is shown. UE 110-1 can be operated to configure a SL channel with co-channel coexistence between an LTE sidelink and an NR sidelink, wherein the LTE sidelink is in LTE mode-4 and the NR sidelink is in NR mode 2; therefore, UE 110-1 can select resources on its own without involving the networks of both the NR SL and the LTE SL. Because UE 110-1 operates to generate co-channel coexistence, the resource allocation process of the NR sidelink UE considers the LTE SL resource reservation for resource allocation. Although the resources for NR SL transmission can come at least in part from the NR resource reservation, the transmission resource candidates can also come from the LTE SL resource reservation. Therefore, the SL channel can be generated to share the same time and frequency resources for both the LTE SL and the NR SL in the same SL channel in co-channel coexistence for transmitting data (such as NR data or LTE data).

[0078] exist Figure 7 In the example process flow 700 of , UE 110-1 has the capability to operate in Mode 2 and Mode 4 for NR and LTE, respectively, for sidelink communications in a SL channel with co-channel coexistence. At 710, as an initial step in Mode 4 operation, UE 110-1 performs sensing on a LTE SL resource pool.

[0079] At 720, UE 110-1 may then perform sensing on an NR SL resource pool that overlaps with the LTE SL resource pool in time and frequency. By operating in Mode 2 for NR sidelink data, at 730, UE 110-1 may select resources for NR SL transmission based on sensing results from both LTE SL and NR SL in a resource selection process. The resources may have different priorities corresponding to the sensing results of LTE SL and NR SL, respectively. When selecting resources for NR SL transmission through an NR sidelink UE resource selection operation with co-channel coexistence, UE 110-1 considers both LTE and NR SL while considering these priorities.

[0080] In an aspect, UE 110-1 may include different modules or components, including an LTE SL module component 740 and an NR SL module component 750, which may be configured to perform process flow 700 for SL co-channel coexistence. LTE module component 740 may be configured to perform sensing on an LTE side link resource pool at 710, and NRSL module component 750 may be configured to perform sensing on an NR side link resource pool that overlaps in time and frequency with the LTE side link resource pool in co-channel coexistence. In one example, NR SL module component 750 may perform sensing based on sensing results of the LTE side link resource pool from LTE module component 740. LTE SL module component 740 communicates its sensing results to NR SL module component 750 to facilitate NR SL resource selection at 730 of process flow 700.

[0081] UE 110-1 is configured with in-device coexistence capability for short-term time division multiplexing (TDM); therefore, LTE resources and NR resources can be shortened accordingly based on information exchange between LTE side link resources and NR side link resources within the UE, especially from LTE SL module component 740 to NR SL module component 750; although the opposite situation from NR SL module component 750 to LTE SL module component 740 is foreseeable. UE 110-1 configures an LTE side link resource pool with time-frequency overlap with the NR side link resource pool for co-channel coexistence with the NR side link resource pool by considering the different NR and LTE resources available and with different priorities for sensing results in different NR and LTE resource pools.

[0082] In one aspect, for example, LTE sidelink sensing results may be processed by UE 110-1 with a higher priority than NR SL sensing results; although the opposite may also be configured. Considering that LTE sidelink operation does not necessarily perform resource reassessment and preemption operations, it means that NR SL resources are more protected and resource reassessment / preemption operations may be performed to ensure that resource reservations are still available, which is not always the same as LTE SL operation.

[0083] One or more LTE resource pools may overlap with NR resource pools. Therefore, LTE SL module component 740 of SL UE 110-1 does not have to send data to another UE (e.g., UE 110-2), but instead receives data. LTE SL module component 740 can therefore perform sensing operations or channel measurements without sending data to the outside of UE 110-1 as NR SL module component 750 does.

[0084] At 710 and 720 of process flow 700, UE 110-1 may perform sensing of candidate resources for transmission on both the LTE side link resource pool and the NR side link resource pool. UE 110-1 may determine whether to sense the LTE resource pool. The UE's NRSL module component 750 may select a transmit resource pool. The NR SL module component 740 may examine the LTE SL (such as a V2X system information block (SIB)) and identify one or more LTE transmit resource pools that overlap with the selected NR transmit pool. If any overlap in resources (time and frequency resources) is determined, sensing may be performed only on the LTE SL. For each of the LTE transmit pools, UE 110-1 may perform sensing.

[0085] In addition, UE 110-1 may have NR SL data to be sent to a receiving UE (e.g., 110-2) in the SL channel. Then, considering co-channel coexistence by considering LTE SL and NR SL, UE 110-1 may perform NR side link resource selection process 700. In one example, LTE side link sensing results may be processed with higher priority for transmission (such as for V2X SL transmission).

[0086] In one aspect, alternatively or additionally, NR SL may be in NR sidelink mode 1, which means that the base station (e.g., gNB 120) controls the NR SL resources, and at the same time UE 110-1 operates on LTE sidelink mode 4 (where UE 110-1 may independently perform sensing for LTE SL without resource allocation from the base station). In this scenario, NR sidelink UE 110-1 may report the LTE sidelink sensing results to gNB 120 so that gNB 120 considers the LTE SL channel occupants when allocating resources.

[0087] In one aspect, UE 110-1 may perform sensing on candidate resources on an LTE sidelink resource pool of an LTE sidelink channel during an LTE sensing window and on candidate resources on an NR sidelink resource pool of an NR sidelink channel that co-exists with the LTE sidelink channel during an NR sensing window. The LTE sensing window may be configured for full sensing operation or partial sensing operation in the LTE sidelink channel, and the NR sensing window may be configured for full sensing operation or partial sensing operation in the NR sidelink channel. Depending on the configuration of the LTE sensing window and the NR sensing window, UE 110-1 may perform resource selection accordingly, such that one configuration may depend on another configuration, such as a full / partial LTE sensing window depends on an NR full / partial sensing window, or vice versa.

[0088] refer to Figure 8, another example process flow 800 for resource allocation in co-channel coexistence according to aspects for full sensing in NR SL resources and LTE SL resources is shown. The process flow 800 further details the configuration of a sensing window for resource allocation and selection operations in the case of sensing in co-channel coexistence when UE 110-1 utilizes LTE SL and NR SL sensing. The resource selection window may be past in time, such that, for example, the NR SL resource pool selection process starts at time slot n, then the first case is full sensing on LTE and NR SL.

[0089] During a resource sensing window or sensing window period, each terminal undergoes a sensing process of decoding the physical sidelink control channel (PSCCH) resource blocks used by all UEs in an area. Therefore, sensing can be used to identify occupied resources and exclude these occupied resource blocks from the candidate resource set. If the UE does not monitor some resources or they have reservations from other UEs, these resources may also be unavailable. After obtaining the set of candidate resources through the sensing process, the resource blocks to be used for data transmission are selected during the selection window by subtracting the excluded or unavailable resources from the total candidate resources. Through this process, even if the base station does not allocate resource blocks, the UE can identify the resource blocks being used by all other terminals, and thus prevent conflicts by selecting appropriate resource candidates for SL communication.

[0090] In one aspect, both LTE and NR resource pools may be sensed by performing full sensing, or both LTE and NR resource pools may be sensed without power saving based sensing, wherein sensing is performed over a shorter duration (e.g., 40 milliseconds (ms) or other partial period) compared to full sensing over an entire observation period from start to end (e.g., 200 ms or other period longer than a partial sensing window).

[0091] Process flow 800 may be performed by UE 110-1 to determine a sensing window for performing resource selection, e.g., as in process flow 700. At 810, process flow 800 may initiate with UE 110-1 identifying overlapping time and frequency resources shared by an LTE resource pool (e.g., an LTE V2X resource pool) and an NR resource pool (e.g., an NR V2X resource pool). At 820, higher layer parameters for NR SL resource selection may be received at time slot n. At 830, a set S of all resources may be configured based on the sensing window. m Processing resource selection window parameters (e.g., T 1 , T 2 ). The resource sensing window can be expressed as [n+T 1 ,n+T 2], where n may be the time of the resource selection slot, and T1 may be the start slot time offset of the sensing window, and T2 may be the end slot time offset. At 840, when UE 110-1 performs full sensing in both NR SL and LTE SL resources, the NR sidelink may be configured based on [nT 0 ,nT proc,0 ] to configure the NR sensing window, and according to [n'-10*P step ,n'-1] to configure the LTE sensing window.

[0092] UE 110-1 may perform a full sensing operation in the NR sidelink channel during the NR sensing window and in the LTE sidelink channel during the LTE sensing window based on the overlapping time and resources between the LTE sidelink resource pool and the NR sidelink resource pool. The NR sensing window may be based on an initial NR time slot (n) that may trigger the NR sidelink resource selection process 800, a side link (SL) sensing window parameter of one or more time slots that may be preconfigured, and a processing time (T proc,0 ), where n may be an integer. The LTE sensing window may be based on an LTE logical or physical subframe (n') corresponding to an initial NR time slot (n), an FDD / TDD configuration parameter, and a predefined positive integer or in-device coordination time between the LTE side link module component and the NR side link module component.

[0093] The sensing window for NR SL can be expressed as: [nT 0 ,nT proc,0 ], where parameter T proc,0 may be the processing time of the sensing result, and T 0 It can be a time period, such as 100ms or other time increments based on resource pool configuration or parameters. 0 For example, it may be equal to the sl-SensingWindow (pre-)configured for the NR sidelink resource pool. Therefore, when UE 110-1 completes sensing, it uses the sensing results in the NR sensing window for data transmission.

[0094] Then, for LTE SL, the LTE sensing window can be expressed as: [n'-10*P step ,n'-1], where parameter n' is different from time slot n in the NR domain and is an LTE subframe that is an LTE logical or physical subframe. The n'-1 portion of the sensing window may correspond to an LTE SL subframe so that one subframe is allocated to process and decode the sensing results. Therefore, UE 110-1 may map the LTE sensing window to NR time slot n by mapping from time slot n to subframe n'. For example, parameter P step(eg, 100 ms for FDD, or other time increments) may depend on FDD / TDD configuration or parameters.

[0095] Alternatively or additionally, the LTE sensing window may be expressed as: [n'-10*P step ,n'-X], where the LTE SL window may end earlier as indicated by a negative X and ensure that the LTE SL module component 740 passes its sensing results to the NR SL module component 750, or passes across different SL module components of UE 110-1. Therefore, the additional processing time X may be factored into the LTE sensing window configuration because of the sensing results of the candidate resources being passed across different SL modules. The additional processing time X may be greater than 1, for example, such as 2ms, 3ms, 4ms, etc., and may depend on the UE capability of UE 110-1 according to the in-device coordinated time to pass the sensing results from the LTE SL module component 740 to the NR SL module component 750.

[0096] refer to Fig. 9 , another example process flow 900 for resource allocation in co-channel coexistence according to aspects for partial sensing in NR SL resources and full sensing in LTE SL resources is shown. For NR SL resources, partial sensing may be performed in a portion of a time slot within a full sensing window period or less than a full sensing window period. The process flow 900 may have similarities to Figure 8 and further includes performing partial sensing in the NR SL and full sensing in the LTE SL at 940, wherein the LTE sensing window may be based on the NR sensing window based on periodic partial sensing (PBPS) or continuous partial sensing (CPS).

[0097] In an aspect, periodicity-based partial sensing or PBPS may be configured for partial sensing of NR SL resources, wherein UE 110-1 monitors time slot resources (e.g., sensing opportunities). If UE 110-1 determines that any time slot is a candidate resource time slot, UE 110-1 selects the corresponding earlier time slot for sensing, wherein the time for time slot sensing may be represented as: t y-k*Preserve , where t y is the selected resource candidate time slot, and based on the resource pool configuration (e.g., additional periodic sensing opportunities), K can be 1 or 2 to perform sensing according to the periodicity for partial sensing operations on the NR SL. K can implement a sensing periodicity of multiple time slots (e.g., 1 or 2 time slots) before the selected candidate resource. If configured, P reserveIt may be a periodicity corresponding to the resource pool configuration (eg, a periodic sensing opportunity reservation period list); otherwise, for example, the periodicity may be derived from a side link configuration list (eg, an sl-resource reservation period list).

[0098] Additionally or alternatively, UE 110-1 may utilize a sensing window (or sensing opportunity) to perform continuous partial sensing or CPS to partially sense the NR SL resources. The time or sensing window for sensing may be expressed as: [n+T A ,n+T B ], where n is the initial NR time slot, T A The first selected resource candidate time slot (t y0 ) before M logical time slots, and T B It can be expressed as the first selected resource candidate time slot t y0 T in the previous time slot proc,0 +T proc,1 Processing time. M may be defined by resource pool configuration (e.g., continuous sensing window periodic or continuous sensing window aperiodic) depending on the traffic type (periodic or aperiodic). For example, CPS may be used to detect aperiodic sensing resource reservation, where the traffic is aperiodic.

[0099] In one aspect, the first selected candidate time slot t used in the partial sensing operation may be based on the sensing results determined in the NR SL resource. y0 To perform full sensing on LTE SL resources. Full sensing in LTE SL can be obtained from the above Figure 8 The LTE full sensing described above is modified so that, for example, the full sensing can be based on the first selected candidate time slot t as used in the NR partial sensing. y0 , instead of n' being mapped to the initial NR time slot n. Therefore, since NR SL partial sensing is performed, the LTE full sensing operation can be based on the selected candidate time slot in the NR SL, so that according to the selected candidate time slot t y0 To configure the LTE SL sensing window. For example, the sensing window for the LTE side link can be [t' y0 -10*P step ,t' y0 -X], where t' y0 is corresponding to and mapped to the selected candidate time slot t y0 LTE logical or physical subframe. As described above, X may be determined by the additional processing time X incorporated into the LTE sensing window configuration because of the sensing results involved in transferring the candidate resources across different SL modules. The additional processing time X may be greater than 1, such as 2ms, 3ms, 4ms, etc., or alternatively 1. For example, parameter P step(eg, 100 ms for FDD, or other time increments) may depend on FDD / TDD configuration or parameters.

[0100] refer to Fig.10 , shows another example process flow 1000 for resource allocation in co-channel coexistence according to aspects for full sensing in NR SL resources and partial sensing in LTE SL resources. For NR SL resources, full sensing may be performed in a full sensing window period. The process flow 800 may have the same Figure 8 and Fig. 9 The method further comprises performing, at 1040, full sensing in the NR SL and partial sensing in the LTE SL, wherein the sensing opportunity (or LTE sensing window) for the LTE SL resources is within the full resource selection window for the NR SL.

[0101] In one aspect, the sensing window for NR SL can be expressed as: 0 ,nT proc,0 ], as above for NR full sensing window configuration Figure 8 T 0 It can be equal to the sl-SensingWindow (pre-)configured for the NR side link resource pool. The sensing opportunity of the LTE side link can be expressed as:

[0102] where t y The parameter P may be a candidate subframe for the LTE sidelink within the resource selection window for the NR sidelink. Based on the resource pool configuration, K may be 1 or 2 (e.g., additional periodic sensing opportunities) to perform sensing according to a periodicity. K may implement a sensing periodicity of multiple time slots (e.g., 1 or 2 time slots) before the candidate resource is selected. For example, the parameter P step (eg, 100 ms for FDD, or other time increments) may depend on FDD / TDD configuration or parameters.

[0103] refer to Fig.11 , shows another example process flow 1100 for resource allocation in co-channel coexistence according to aspects for partial sensing in NR SL resources and partial sensing in LTE SL resources. For NR SL resources, partial sensing may be performed in a partial sensing window period. The process flow 1100 may have the same Figures 8 to 10 The method may be similar to actions 810 to 830 of , and further include performing partial sensing in the NR SL and partial sensing in the LTE SL at 1140, wherein the LTE sensing window overlaps in time / frequency with a candidate time slot in the NR sensing window for the NR SL resources.

[0104] In one aspect, the sensing occasions at the LTE SL may be based on where t y is the selected candidate time slot for NR SL transmission, and K can be 1 or 2 based on the resource pool configuration (e.g., additional periodic sensing opportunity) so as to perform sensing according to periodicity. For NR SL, the UE may perform the above-mentioned Fig. 9 When UE 110-1 performs PBPS, the UE may y-k*Preserve The monitoring time slot is t y is the selected candidate time slot for SL transmission. UE 110-1 may use the sensing window [n+T A ,n+T B ] to perform CPS, where T A It can be in the first selected resource candidate time slot (t y0 ) before M logical time slots, and T B It can be expressed as y0 T in the previous time slot proc,0 +T proc,1 Processing time. M may be defined by the resource pool configuration (e.g., continuous sensing window periodicity or continuous sensing window aperiodicity) depending on the service type (periodic or aperiodic service). The sensing opportunity of the LTE sensing window for the LTE sidelink may be expressed as where t y is a candidate subframe for the LTE sidelink that has a time overlap with any candidate time slot in the NR sidelink; based on the resource pool configuration, K may be 1 or 2 (e.g., additional periodic sensing opportunities) to perform sensing according to periodicity, and P step (eg, 100 ms for FDD, or other time increments) may depend on FDD / TDD configuration or parameters.

[0105] refer to Fig.12 , shows another example process flow 1200 according to various aspects, which can be from Figures 8 to 11 Any one or more of flows at “A” for resource allocation for SL transmission in co-channel coexistence with LTE SL and NR SL resources.

[0106] Process 1200 from Figures 8 to 11 Continuing at "A" of any one or more of , at 1210, UE 110-1 obtains a resource exclusion initial RSRP threshold list (or data set). At least one threshold list corresponds to and includes RSRP for LTE resource reservation, and at least another threshold list corresponds to and includes RSRP for NR resource reservation.

[0107] In one aspect, the selected RSRP may depend on the priority of the data being sent or to be received, so that different data priorities sent in the SL channel coexisting on the same channel may be associated with different RSRP values ​​of the RSRP list. The RSRP list may be obtained, preconfigured or received by a higher layer. For example, two independently (pre) configured initial RSRP threshold lists may be preconfigured corresponding to LTE and NR, respectively.

[0108] In one example, the RSRP threshold list may include an “sl-Thres-RSRP-List” for NR SL. This RSRP list may serve as an initial RSRP threshold list, where the actual RSRP threshold depends on the transmission data priority (p i ) and NR reserved data priority (p j ), where the sending data priority (p i ) may correspond to the data priority reserved by other UEs, and the NR reserved data priority (p j ) corresponds to the data priority of transmitting UE 110-1. Therefore, UE 110-1 may determine the RSRP from the RSRP threshold list based on the data priority of other SL transmission data of other UEs and its own SL data transmitted for NR SL. For LTE SL, an additional threshold list (e.g., “sl-Thres-RSRP-LTE-List”) may be used for sensing on the LTE SL channel. This list may serve as an initial RSRP threshold list for LTE SL, where the actual RSRP threshold depends on the transmission data priority (p i ) and LTE reserved data priority (p j UE 110-1 may also reserve P based on LTE resources. j To determine the RSRP threshold from the additional threshold list, and send the NR SL data that UE 110-1 will use for NR SL transmission as Pi. Therefore, UE110-1 can use an independent priority list for an initial RSRP threshold that depends on the LTE SL data priority and the NR SL data priority sent in the co-channel coexistence shared time / frequency resources on the SL channel.

[0109] Alternatively or additionally, a single combined RSRP threshold list may be used to determine the RSRP threshold in a resource allocation process for SL communication with co-channel coexistence between LTE SL and NR SL. The above two lists (e.g., "sl-Thres-RSRP-List" for NRSL and "sl-Thres-RSRP-LTE-List" for LTE SL) may be related to each other so that only one list is used and an offset is (pre)configured to utilize the other list. The offset may be an RSRP offset that is an additional parameter (e.g., as a single offset value) configured by or per resource pool. For example, if UE 110-1 obtains an initial RSRP from an NRSL RSRP threshold list (e.g., "sl-Thres-RSRP-List" for NR SL), then for LTE SL, the additional offset may be factored into it, such as, for example, an addition or subtraction operation, or other operation to obtain the initial LTE threshold. Therefore, the “sl-Thres-RSRP-List” may serve as an initial RSRP threshold list, where the actual RSRP threshold depends on the transmission data priority (p i ) and any other NR reserved data priority (p j Then, for the sending data priority (p i ) and LTE reserved data priority (p j ), the corresponding initial RSRP threshold can be determined by adding the (pre) configured RSRP offset to the “sl-Thres-RSRP-List”.

[0110] At 1220 and 1230, the process flow 1200 for resource allocation is similar to Figure 6 The process flow 600 continues with steps 630 to 640 for performing resource allocation by sensing and selecting available SL resources in the co-channel coexistence between the NR SL and the LTE SL. At 1220, the initial candidate resource set S A Can be initialized to include all resources in the resource selection window. A At 1230, UE 110-1 may select from a set of candidate resources S A Candidate resources for which UE 110-1 has not sensed resources in a sensed resource window with a configured resource reservation period before the candidate time slot, such as those resources that are not periodically monitored, are excluded.

[0111] At 1240, the process flow 1200 continues by excluding candidate resources determined to be reserved by other UEs having an RSRP that meets a threshold based on the data priority (if reserved) for SL transmission on the SL channel. In one aspect, the exclusion may depend on whether the reservation or use of the resources is from LTE SL or from NR SL resources. For example, an LTE SL resource reservation may have a higher priority than an NR SL resource reservation, or vice versa, an NR SL resource reservation has a higher priority than an LTE SL reservation. In the resource selection window, if a candidate resource is reserved by another UE with a sufficiently large RSRP measurement that is greater than a threshold, the transmitting UE 110-1 may exclude the candidate resource, depending on whether the reservation is from LTE SL or from NR SL resources. The RSRP may be based on the aspects above at 1230, or an RSRP threshold increased from an initial RSRP threshold (as discussed below with respect to process flow action 1250).

[0112] At 1250, something like Figure 6 660 makes a determination, wherein UE 11-1 may determine a candidate resource set S A Is the number of resources in less than X*M? total or X*S M , where X can be a positive integer or a percentage of the total number of candidate resources. If the determination is "yes", then at 160, UE 110-1 can increase the RSRP threshold (e.g., by 3 dB) and repeat 1220 to 1250 to determine whether any of the remaining resources are available, the remaining resources being a certain percentage of the total number of resources in another iteration when the RSRP threshold is increased; thus, given the exclusion of some resources and potentially making the candidate resource set S A Once the total number of resources S M If X percentage of the candidate set is within the candidate set, UE 110-1 may report the candidate results to higher layers for random resource selection. In other words, if “no” is the determination at 1270, UE 110-1 may report the candidate resource set S to higher layers. A .

[0113] In an aspect, at 1260, the increase may be based on 3 dB increments for at least one of: NR SL or LTE SL; thus, 3 dB may be applied to one or both. Alternatively or additionally, a 3 dB increase may be applied to the RSRP threshold only for NR SL, and another different incremental increase (e.g., 5 dB) may be applied to LTE SL.

[0114] refer to Fig.13, an example processing flow 1300 for resource allocation for SL transmission with co-channel coexistence of LTE SL and NR SL resources according to various aspects is shown. The processing flow 1300 of UE 110-1 can support NR SL in mode-1 SL operation and LTE SL in mode-4 operation; therefore, the NR SL UE can report LTE sensing results to the base station.

[0115] At 1310, UE 110-1 may operate NR SL in mode-1 operation and operate LTE SL in mode-4 operation, for example, in co-channel coexistence between LTE SL and NR.

[0116] At 1320, UE 110-1 may perform resource sensing for LTE SL but not for NR SL resources because, for example, NR SL transmission resources are allocated by the base station or gNB 120. Although UE 110-1 is configured for operation of SL resource allocation, SL sensing, and SL transmission co-channel coexistence between LTE SL and NR SL, in Mode-1, UE 110-1 obtains its NR SL resources from the base station and performs its own resource allocation and sensing only from candidates for LTE SL because LTE SL resources are configured in Mode-4 LTE SL resource allocation.

[0117] At 1330, UE 110-1 still operates to report its LTE sensing results even though resource allocation for SL transmission is being configured in co-channel coexistence between NR SL and LTE SL. UE 110-1 reports its sensing results on the same co-channel so that base station or gNB 120 can obtain information about LTE resource usage, through which the base station or gNB can consider the information when scheduling NR resources for NR SL resource allocation for UE 110-1 and other UEs in its vicinity or in the same network.

[0118] In one aspect, in response to a trigger or trigger condition, UE 110-1 may report its LTE sensing results to the base station. For example, the trigger condition may be a request received from the base station or gNB 120, because gNB 120 may know that UE 110-1 performed sensing on LTE SL and also provide a request to UE 110-1 to provide some sensing results for LTE SL.

[0119] Alternatively or additionally, the reporting may be event triggered. For example, if UE 110-1 has some NR SL data to send, it may request NR SL authorization from gNB 120 and report its LTE sensing results to gNB 120 at this time.

[0120] Alternatively or additionally, the reporting may depend on the LTE channel busy rate (CBR). For example, if the LTE SL channel is busy, or exceeds a CBR threshold, UE 110-1 may be triggered to report the sensing results to gNB 120, further indicating through the report that there is a lot of resource usage from the LTE SL, and that care may be taken not to conflict with other LTE SL transmissions.

[0121] In one aspect, the reporting frequency of the sensing results can be aperiodic or periodic. For example, the reporting can be configured according to a periodic pattern or sporadically (eg, in an aperiodic pattern).

[0122] In one aspect, the reporting format may adopt a format of a resource mapping such as a two-dimensional time and frequency dimension resource mapping. Alternatively or additionally, the reporting format may be indicated as a time domain resource indicator value (TRIV), a frequency domain resource indicator value (FRIV), and a resource-based periodicity or priority.

[0123] At 1340, the NR SL data transmission UE may transmit a scheduling request (SR) report and a buffer status report (BSR) to the base station to subsequently obtain NR SL resources for NR SL transmission. For NR SL data transmission, UE 110-1 may first request SL grant from gNB 120, but in addition it may check the granted resources from the gNB to determine whether gNB 120 still grants resources that have some conflicts with LTE sensing results that have not been reported by the gNB, which may occur due to the LTE sensing results not being reported in a timely manner.

[0124] At 1350, UE 110-1 may obtain a SL transmission grant on the particular SL channel from base station or gNB 120. UE 110-1 may additionally check whether the granted NR SL resources have potential conflicts, such as conflicts with updated LTE SL results. If no conflict potential is detected, UE 110-1 may perform the NR SL transmission; otherwise, it may drop the transmission or take additional / repeated actions as described herein.

[0125] In one aspect, if UE 110-1 determines that there is a potential conflict between the NR sidelink grant and any LTE sidelink reservation, UE 110-1 may not transmit on the granted NR sidelink resources and may report a sidelink hybrid automatic repeat request negative acknowledgement (SL HARQ-NACK) to gNB 120 to indicate the SL transmission failure. Alternatively or additionally, UE 110-1 may use the scheduled grant and ignore LTE occupancy. Alternatively or additionally, UE 110-1 may compare the LTE SL priority associated with the potentially conflicting reservation or resources with the NR SL data priority it is attempting to SL transmit. For example, if UE 110-1 has its own NR SL data to transmit, it may have a higher priority than the LTE SL priority of the resources with the potential conflict. If the LTE SL has a higher priority, UE 110-1 may discard the NR grant. If it is reserved by another UE with a lower data priority, UE 110-1 may continue to transmit. However, if the LTE SL is reserved with higher priority data and UE 110-1 has its own NR SL to send with lower priority data, it may discard the NR grant. If there is no conflict, UE 110-1 may transmit on the granted NR sidelink resources.

[0126] It is understood that the use of personally identifiable information should be subject to privacy policies and practices that are generally recognized to meet or exceed industry or government requirements for maintaining user privacy. Specifically, personally identifiable information data should be managed and processed to minimize the risk of unintentional or unauthorized access or use, and the nature of the authorized use should be clearly stated to users.

[0127] The present disclosure will now be described with reference to the accompanying drawings, wherein throughout the text, similar figure numerals are used to refer to similar elements, and the structures and devices shown therein need not be drawn to scale. As used herein, the terms "component", "system", "interface", etc. are intended to refer to entities, hardware, software (e.g., in execution) or firmware related to a computer. For example, a component can be a processor (e.g., a microprocessor, a controller or other processing device), a process running on a processor, a controller, an object, an executable file, a program, a storage device, a computer, a tablet computer, or a user equipment (e.g., a mobile phone, etc.) with a processing device. By way of example, an application and a server running on a server can also be a component. One or more components may reside in a process, and a component may be located on a computer and / or distributed between two or more computers. This article may describe a set of elements or other sets of components, wherein the term "set" may be interpreted as "one or more".

[0128] In addition, these components can execute from various computer-readable storage media having various data structures stored thereon, such as using modules. The components can communicate via local or remote processes, such as according to signals having one or more data packets (e.g., data from one component interacts with another component in a local system, a distributed system, or an entire network, such as the Internet, a local area network, a wide area network, or a similar network with other systems via signals).

[0129] As another example, a component may be a device having a specific functionality provided by mechanical parts that operate through electrical or electronic circuits, where the electrical or electronic circuits may be operated by software applications or firmware applications executed by one or more processors. The one or more processors may be internal or external to the device and may execute at least a portion of the software application or firmware application. As another example, a component may be a device that provides a specific functionality through electronic components without mechanical parts; the electronic components may include one or more processors therein to execute at least a portion of the software and / or firmware that gives the electronic components their functionality.

[0130] The use of the word "exemplary" is intended to present concepts in a specific way. As used in this application, the term "or" is intended to mean an inclusive "or" rather than an exclusive "or". That is, unless otherwise specified or clear from the context, "X adopts A or B" is intended to mean any natural inclusive arrangement of natural inclusive arrangements. That is, if X adopts A; X adopts B; or X adopts both A and B, then "X adopts A or B" is satisfied in any of the aforementioned cases. In addition, the articles "one" and "an" used in this application and the appended claims should generally be interpreted as meaning "one or more" unless otherwise specified or clear from the context to point to a singular form. In addition, to the extent that the terms "including", "comprising", "having", "having", "with" or their variations are used in the specific embodiments and claims, such terms are intended to be included in a manner similar to the term "comprising". In addition, in the case of discussing one or more numbered items (e.g., "first X", "second X", etc.), generally, the one or more numbered items can be different or they can be the same, but in some cases, the context may indicate that they are different or that they are the same.

[0131] As used herein, the term "circuit" may refer to, may be a part of, or may include an application specific integrated circuit (ASIC), electronic circuit, processor (shared, dedicated, or group), or associated memory (shared, dedicated, or group) operably coupled to the circuit that executes one or more software programs or firmware programs, combinational logic circuits, or other suitable hardware components that provide the described functionality. In some embodiments, the circuit may be implemented in one or more software modules or firmware modules, or the functionality associated with the circuit may be implemented by one or more software modules or firmware modules. In some embodiments, the circuit may include logic that is at least partially operable in hardware.

[0132] As used in this specification, the term "processor" may refer to substantially any computing processing unit or device, including but not limited to single-core processors; single processors with software multithreaded execution capabilities; multi-core processors; multi-core processors with software multithreaded execution capabilities; multi-core processors with hardware multithreading technology; parallel platforms; and parallel platforms with distributed shared memory. In addition, a processor may refer to an integrated circuit, an application-specific integrated circuit, a digital signal processor, a field programmable gate array, a programmable logic controller, a complex programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions or processes described herein. The processor may utilize nanoscale architectures, such as but not limited to molecular and quantum dot-based transistors, switches, and gates, in order to optimize space usage or enhance the performance of mobile devices. The processor may also be implemented as a combination of computing processing units.

[0133] Examples (implementations) may include subject matter, such as methods, devices for performing actions or boxes of the method, and at least one machine-readable medium comprising instructions that, when executed by a machine (e.g., a processor with memory, an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), etc.), cause the machine to perform actions of a method or device or system for concurrent communication using multiple communication technologies according to the embodiments and examples described herein.

[0134] In addition, various aspects or features described herein may be implemented as methods, devices or articles using standard programming or engineering techniques. As used herein, the term "article" is intended to cover computer programs that can be accessed from any computer-readable device, carrier or medium. For example, computer-readable media may include, but are not limited to, magnetic storage devices (e.g., hard disks, floppy disks, magnetic strips, etc.), optical disks (e.g., compact disks (CDs), digital versatile disks (DVDs), etc.), smart cards, and flash memory devices (e.g., EPROMs, cards, sticks, key drives, etc.). In addition, the various storage media described herein may represent one or more devices or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing or carrying instructions or data. In addition, a computer program product may include a computer-readable medium having one or more instructions or codes that are operable to cause a computer to perform the functions described herein.

[0135] Communication media embodies computer readable instructions, data structures, program modules, or other structured or unstructured data in a data signal such as a modulated data signal, such as a carrier wave or other transport mechanism, and includes any information delivery or transmission media. The term "modulated data signal" or signal refers to a signal that has one or more of its characteristics set or changed in a manner that encodes information in one or more signals. By way of example, and not limitation, communication media include wired media such as a wired network or direct-wired connection, and wireless media such as acoustic, RF, infrared and other wireless media.

[0136] An exemplary storage medium may be coupled to a processor so that the processor can read information from the storage medium and write information to the storage medium. In an alternative, the storage medium may be integrated with the processor. In addition, in some aspects, the processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a user terminal. In an alternative, the processor and the storage medium may reside in a user terminal as discrete components. In addition, in some aspects, the process or action of a method or algorithm may reside on a machine-readable medium or a computer-readable medium as one or any combination or set of codes or instructions, and may be incorporated into a computer program product.

[0137] In this regard, although the subject matter disclosed herein has been described in conjunction with various embodiments and corresponding drawings, it should be understood that other similar embodiments may be used or modifications and additions may be made to the described embodiments, where applicable, to perform the same, similar, alternative or alternative functions of the disclosed subject matter without departing from the described embodiments. Therefore, the disclosed subject matter should not be limited to any single embodiment described herein, but should be interpreted in accordance with the breadth and scope of the following claims.

[0138] In particular, with respect to the various functions performed by the above-described components (components, devices, circuits, systems, etc.), unless otherwise specified, the terms used to describe such components (including references to "means") are intended to correspond to any component or structure that performs the specified function of the component (e.g., functionally equivalent), even if not structurally equivalent to the disclosed structure that performs the function in the exemplary implementations of the disclosure shown herein. In addition, while particular features have been disclosed with respect to only one of several implementations, for any given or particular application, such features may be combined with one or more other features of other implementations, which may be desirable and advantageous.

Claims

1. A user equipment (UE), the UE comprising: Memory; as well as a processing circuit coupled to the memory, the processing circuit being configured to, when executing instructions stored in the memory, cause the UE to: performing sensing on a long term evolution (LTE) sidelink resource pool of an LTE sidelink channel and a new radio (NR) sidelink channel resource pool of an NR sidelink channel for candidate resources, the candidate resources to be used for sidelink (SL) communication on the NR sidelink channel based on a result of the sensing; as well as According to the result of the sensing, the SL communication is sent on the NR side link channel based on the LTE candidate resources of the LTE side link channel and the NR candidate resources of the NR side link channel.

2. The UE according to claim 1, wherein the processing circuit is further configured to: Based on the result of the sensing of the LTE side link resource pool that overlaps with the NR side link resource pool in time and frequency, resource selection is performed on the candidate resources on the NR side link resource pool.

3. The UE according to claim 1, wherein the processing circuit is further configured to: A higher priority of the result of the sensing is associated with the LTE sidelink resource pool, and a sidelink resource selection process is performed for the NR sidelink data to be sent.

4. The UE according to claim 1, wherein the processing circuit is further configured to: The sensing of the candidate resources is performed on the LTE side link resource pool of the LTE side link channel during an LTE sensing window and on the NR side link resource pool of the NR side link channel co-existing with the LTE side link channel during an NR sensing window, wherein the LTE sensing window is configured for a full sensing operation or a partial sensing operation in the LTE side link channel, and the NR sensing window is configured for the full sensing operation or the partial sensing operation in the NR side link channel.

5. The UE according to claim 1, wherein the processing circuit is further configured to: Based on the overlapping time and frequency resources between the LTE side link resource pool and the NR side link resource pool, a full sensing operation is performed in the NR side link channel during the NR sensing window and the full sensing operation is performed in the LTE side link channel during the LTE sensing window.

6. The UE according to claim 5, wherein the NR sensing window is based on an initial NR time slot (n) triggering the NR side link resource selection process, a side link (SL) sensing window parameter of one or more time slots preconfigured or indicated by higher layer signaling, and a processing time (T proc,0 ), wherein n comprises an integer, and wherein the LTE sensing window is based on an LTE logical or physical subframe (n') corresponding to the initial NR timeslot (n), a frequency division duplex (FDD) / time division duplex (TDD) configuration parameter, and a predefined positive integer or in-device coordination time between an LTE side link module component and an NR side link module component.

7. The UE according to claim 1, wherein the processing circuit is further configured to: Based on overlapping time and frequency resources between the LTE side link resource pool and the NR side link resource pool, a partial sensing operation is performed in the NR side link channel during an NR sensing window and a full sensing operation is performed in the LTE side link channel during an LTE sensing window, wherein the LTE sensing window is based on a first selected candidate time slot for the partial sensing operation in the NR side link channel for the co-channel coexistence between the NR side link channel and the LTE side link channel.

8. The UE according to claim 1, wherein the processing circuit is further configured to: Based on the overlapping time and frequency resources between the LTE side link resource pool and the NR side link resource pool, a full sensing operation is performed in the NR side link channel during an NR sensing window and a partial sensing operation is performed in the LTE side link channel during an LTE sensing window, wherein the candidate subframe of the LTE side link channel is within the NR sensing window of the NR side link channel for the co-channel coexistence between the NR side link channel and the LTE side link channel.

9. The UE according to claim 1, wherein the processing circuit is further configured to: Based on the overlapping time and frequency resources between the LTE side link resource pool and the NR side link resource pool, a partial sensing operation is performed in the NR side link channel during the NR sensing window and another partial sensing operation is performed in the LTE side link channel during the LTE sensing window, wherein the candidate subframe of the LTE side link channel temporally overlaps with the candidate time slot in the NR side link channel for the co-channel coexistence between the NR side link channel and the LTE side link channel.

10. The UE according to claim 1, wherein the processing circuit is further configured to: An initial RSRP for excluding candidate resources is determined based on two separate reference signal received power (RSRP) threshold lists or a single RSRP threshold list with an offset value, wherein the two separate RSRP threshold lists include a first RSRP threshold list for NR reservation of the candidate resources and a second RSRP threshold list for LTE reservation of the candidate resources.

11. The UE according to claim 1, wherein the processing circuit is further configured to: Based on whether the reservation is on the LTE sidelink channel or the NR sidelink channel, candidate resources reserved by other UEs with an RSRP threshold are excluded.

12. The UE according to claim 1, wherein the processing circuit is further configured to: In response to the selected candidate resources being less than a percentage of total available candidate resources, increasing the RSRP threshold for evaluating the LTE side link candidate resources differently than the NR side link candidate resources, or having the same increase for both the LTE side link candidate resources and the NR side link candidate resources.

13. The UE according to claim 1, wherein the result of the sensing includes an LTE sidelink mode-4 sensing result and an NR sidelink mode-2 sensing result, or only includes the LTE sidelink mode-4 sensing result when operating in an NR sidelink mode-1 co-existing with the LTE sidelink channel, The processing circuit is further configured to report the LTE SL mode-4 sensing result to a base station to obtain an NR scheduling grant for NR sidelink data transmission on the NR sidelink channel based on the LTE SL mode-4 sensing result.

14. The UE according to claim 13, wherein the processing circuit is further configured to determine whether there is a potential conflict between the NR side link resources of the NR side link grant and the LTE side link reservation; and in response to the existence of the potential conflict, discard the NR scheduling grant; report a sidelink hybrid automatic repeat request negative acknowledgment (SL-HARQ NACK); use the NR scheduling grant; or determine the data priority between the LTE side link priority and the NR side link priority of the LTE side link reservation; and in response to the LTE side link priority being higher, discard the NR scheduling grant.

15. A method for resource allocation in sidelink (SL) communication, the method comprising: performing, via a processing circuit, sensing candidate resources on a Long Term Evolution (LTE) sidelink candidate resource pool of an LTE sidelink channel and a New Radio (NR) sidelink channel candidate resource pool of an NR sidelink channel, the candidate resources to be used for sidelink (SL) communication on the NR sidelink channel based on a result of the sensing; as well as Via the processing circuit and in accordance with the result of the sensing, the SL communication is provided on the NR side link channel based on the LTE candidate resources of the LTE side link channel and the NR candidate resources of the NR side link channel.

16. The method according to claim 15, further comprising: Determining overlapping time and frequency resources shared by the LTE candidate resource pool and the NR candidate resource pool; receiving parameters for NR resource selection at a time slot; as well as A resource selection window parameter that determines the total number of candidate resources.

17. The method according to claim 16, further comprising: The NR sensing window for the NR side link channel and the LTE sensing window for the LTE side link channel are configured based on the LTE sensing in the full sensing operation or the partial sensing operation of the LTE side link channel and the NR sensing window in the full sensing operation or the partial sensing operation of the NR side link channel.

18. The method according to claim 17, further comprising: Obtain one or more initial reference signal received power (RSRP) threshold lists, the one or more initial RSRP threshold lists comprising at least one of: an LTE reservation list or an NR reservation list; Eliminating candidate resources according to at least one of: the one or more initial RSRP thresholds or RSRP offset values ​​associated with at least one of: the LTE reservation list or the NR reservation list and priorities of the LTE candidate resource pool and the NR candidate resource pool; as well as In response to the selected candidate resources being less than a percentage of total available candidate resources, increasing the one or more initial RSRP thresholds for the LTE side link candidate resources differently than the NR side link candidate resources, or having the same increase for both the LTE side link candidate resources and the NR side link candidate resources.

19. A baseband processor, comprising: Memory; a processing circuit coupled to the memory, the processing circuit being configured to, when executing instructions stored in the memory, cause the baseband processor to: performing sensing on a long term evolution (LTE) sidelink resource pool of an LTE sidelink channel and a new radio (NR) sidelink channel resource pool of an NR sidelink channel for candidate resources, the candidate resources to be used for sidelink (SL) communication on the NR sidelink channel based on a result of the sensing; as well as According to the result of the sensing, the SL communication is sent on the NR side link channel based on the LTE candidate resources of the LTE side link channel and the NR candidate resources of the NR side link channel.

20. The baseband processor of claim 19, wherein the result of the sensing includes an LTE sidelink Mode-4 sensing result and an NR sidelink Mode-2 sensing result, or only includes the LTE sidelink Mode-4 sensing result when operating in an NR sidelink Mode-1 co-existing with the LTE sidelink channel, and The processing circuit is further configured to report the LTE SL mode-4 sensing result to a base station to obtain an NR scheduling grant for NR sidelink data transmission on the NR sidelink channel based on the LTE SL mode-4 sensing result.

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