Method and apparatus of supporting data transmissions
By aligning PDU session and DRB establishment with the UE's sensing role, the proposed solution addresses inefficiencies in ISAC systems, optimizing resource usage and reducing transmission delays.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- LENOVO (BEIJING) LTD
- Filing Date
- 2025-09-18
- Publication Date
- 2026-07-30
AI Technical Summary
Existing wireless communication systems face challenges in efficiently establishing PDU sessions and DRBs for sensing tasks in integrated sensing and communication (ISAC), leading to unnecessary resource maintenance or delayed data transmission.
The proposed solution involves configuring UEs to act as sensing reception devices by establishing PDU sessions and DRBs based on sensing indication information, allowing for explicit or implicit activation and deactivation of DRBs, and optimizing the timing of PDU session establishment to balance resource maintenance and delay.
This approach enhances resource efficiency and reduces delays in data transmission by aligning PDU session and DRB establishment with the UE's sensing role, optimizing radio resource usage and transmission efficiency.
Smart Images

Figure CN2025122187_30072026_PF_FP_ABST
Abstract
Description
METHOD AND APPARATUS OF SUPPORTING DATA TRANSMISSIONSTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to techniques of supporting data transmissions.BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may support wireless communications for one or multiple user communication devices, which may be otherwise known as user equipment (UE) , or other suitable terminology. The wireless communications system may support wireless communications with one or multiple user communication devices by utilizing resources of the wireless communication system (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers, or the like) ) . Additionally, the wireless communications system may support wireless communications across various radio access technologies including third generation (3G) radio access technology, fourth generation (4G) radio access technology, fifth generation (5G) radio access technology, among other suitable radio access technologies beyond 5G (e.g., sixth generation (6G) ) .SUMMARY
[0003] An article “a” before an element is unrestricted and understood to refer to “at least one” of those elements or “one or more” of those elements. The terms “a, ” “at least one, ” “one or more, ” and “at least one of one or more” may be interchangeable. As used herein, including in the claims, “or” as used in a list of items (e.g., a list of items prefaced by a phrase such as “at least one of” or “one or more of” or “one or both of” ) indicates an inclusive list such that, for example, a list of at least one of A, B, or C means A or B or C or AB or AC or BC or ABC (i.e., A and B and C) . Also, as used herein, the phrase “based on” shall not be construed as a reference to a closed set of conditions. For example, an example step that is described as “based on condition A” may be based on both a condition A and a condition B without departing from the scope of the present disclosure. In other words, as used herein, the phrase “based on” shall be construed in the same manner as the phrase “based at least in part on. Further, as used herein, including in the claims, a “set” may include one or more elements.
[0004] Some implementations of the methods and apparatuses described herein may further include a UE for wireless communication, which may include: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the UE to: receive, from a radio access network (RAN) node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE;and send, to the RAN node, a sensing reporting associated with the sensing task via a data radio bearer (DRB) associated with a protocol data unit (PDU) session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.
[0005] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the UE to trigger a PDU session establishment procedure for the PDU session in a case of: receiving authorization for the UE of acting as a sensing reception UE from a core network (CN) ; receiving a message initiating that the UE is a candidate sensing reception UE from a CN; or receiving a request of triggering the PDU session establishment procedure from a CN.
[0006] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include sensing session related configuration for the sensing task, and the at least one processor is configured to further cause the UE to: receive PDU session related information for the PDU session from the RAN node before receiving the sensing session related configuration; and receive, from the RAN node, DRB related configuration for the DRB together with the sensing session related configuration or after receiving the sensing session related configuration; and establish the DRB based on the DRB related configuration.
[0007] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the UE to: receive deferment indication information together with the PDU session related information, indicating that establishment of DRB for the PDU session will be deferred until the UE is configured to act as a sensing reception UE.
[0008] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include one or multiple of sensing session related configuration for the sensing task or an activation indication indicating to activate DRB in inactive state for the PDU session, and the at least one processor is configured to further cause the UE to: receive PDU session related information for the PDU session and DRB related configuration for the DRB from the RAN node before receiving the sensing indication related information, wherein the DRB related configuration includes inactivation indication information indicating that DRB for the PDU session will be inactive until the UE is configured to act as a sensing reception UE; keep the DRB in the inactive state until receiving the sensing indication related information; and activate the DRB in the inactive state in the case of receiving the sensing indication related information.
[0009] In some implementations of the methods and apparatuses described herein, keeping the DRB in the inactive state may include not establishing entities of the DRB, and activating the DRB in the inactive state may include establishing the entities of the DRB based on the DRB related configuration.
[0010] In some implementations of the methods and apparatuses described herein, keeping the DRB in the inactive state may include: establishing the entities of the DRB based on the DRB related configuration, and one or multiple of: suspending part or all of established entities, suspending data transmission for the DRB, or not monitoring physical downlink control channel (PDCCH) addressing to a radio network temporary identifier (RNTI) dedicated to the DRB; and activating the DRB in the inactive state may include one or multiple of: resuming suspended entities, resuming suspended data transmission for the DRB, and / or monitoring PDCCH addressing to the RNTI dedicated to the DRB.
[0011] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the UE to: trigger a PDU session establishment procedure for the PDU session in the case of receiving the sensing indication related information; receive PDU session related information for the PDU session and DRB related configuration for the DRB from the RAN node; and establish the DRB based on the DRB related configuration.
[0012] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include one or multiple of: sensing session related configuration for the sensing task; a sensing indication indicating the UE to act as a sensing reception UE; UE route selection policy (URSP) assistance information of the PDU session; or a request of triggering the PDU session establishment procedure.
[0013] Some implementations of the methods and apparatuses described herein may further include a processor for wireless communication, which may include: at least one controller coupled with at least one memory and configured to cause the processor to: receive, from a RAN node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; and send, to the RAN node, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.
[0014] Some implementations of the methods and apparatuses described herein may further include a network equipment (NE) for wireless communication, which may include: at least one memory; and at least one processor coupled with the at least one memory and configured to cause the NE to: send, to a UE, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; receive, from the UE, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of sending the sensing indication related information; and send, to a CN, the sensing reporting via a transport tunnel, wherein the transport tunnel is only associated with the PDU session or associated with multiple PDU sessions including the PDU session, and part or all of the multiple PDU sessions are associated with the sensing task or different sensing tasks.
[0015] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include sensing session related configuration for the sensing task, and the at least one processor is configured to further cause the NE to: receive, from the CN, a PDU session setup request for the PDU session with deferment indication information, indicating that establishment of DRBs for the PDU session will be deferred until the UE is configured to act as a sensing reception UE; and send, to the UE, PDU session related information for the PDU session based on the PDU session setup request before sending the sensing indication related information.
[0016] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive, from the CN, a sensing session setup request to indicate the sensing session related configuration; and send, to the UE, DRB related configuration for the DRB together with the sensing session related configuration or after sending the sensing session related configuration.
[0017] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include one or multiple of sensing session related configuration for the sensing task or an activation indication to activate DRBs in active state for the PDU session, and the at least one processor is configured to further cause the NE to: receive, from the CN, a PDU session setup request for the PDU session with inactivation indication information, indicating that DRBs for the PDU session will be inactive until the UE is configured to act as a sensing reception UE; and send, to the UE, PDU session related information for the PDU session and DRB related configuration for the DRB based on the PDU session setup request before sending the sensing indication related information, wherein the DRB related configuration includes the inactivation indication information.
[0018] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive, from the CN, a sensing session setup request to indicate the sensing session related configuration, or the sensing session related configuration and activation indication, wherein the sensing indication related information is sent based on the sensing session setup request.
[0019] In some implementations of the methods and apparatuses described herein, the sensing session setup request may include candidate related information indicating a plurality of candidate sensing reception UEs, and the at least one processor is configured to further cause the NE to: determine one or multiple UEs including the UE from the plurality of candidate sensing reception UEs as sensing reception UEs for the sensing task indicated in the sensing session setup request.
[0020] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include one or multiple of sensing session related configuration for the sensing task or a sensing indication indicating the UE to act as a sensing reception UE, and the at least one processor is configured to further cause the NE to: receive, from the CN, candidate related information indicating a plurality candidate sensing reception UEs; determine one or multiple UEs including the UE from the plurality of candidate sensing reception UEs as sensing reception UEs for the sensing task; and send the sensing session related configuration with or without the sensing indication to the one or multiple UEs.
[0021] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive URSP assistance information of the PDU session from the CN; and send the URSP assistance information to the UE.
[0022] In some implementations of the methods and apparatuses described herein, the sensing indication related information may include a request of triggering the PDU session establishment procedure from a CN, and the at least one processor is configured to further cause the NE to: receive, from the CN, candidate related information indicating a plurality of candidate sensing reception UEs; determine one or multiple UEs including the UE from the plurality of candidate sensing reception UEs as sensing reception UEs for the sensing task; and send ID of the one or multiple UEs to the CN.
[0023] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive, from the CN, a sensing session setup request to establish a sensing session associated with the PDU session, including one or multiple of: identification (ID) of the sensing session, ID allocated by the CN to identify the sensing session within the CN in a direct interface between the CN and the NE, or uplink tunnel information allocated by the CN; send, to the CN, a sensing session setup response, including one or multiple of: ID of the sensing session, ID allocated by the NE to identify the sensing session within the NE in the direct interface between the CN and the NE, or downlink tunnel information allocated by the NE; then, receive, from the CN, a PDU session setup request to establish the PDU session between the UE and the CN, wherein the PDU session setup request includes session association information used to associate the PDU session with the sensing session or the transport tunnel, including one or multiple of: the sensing session ID, the ID allocated by the CN to identify the sensing session, the ID allocated by the NE to identify the sensing session, the uplink tunnel information or the downlink tunnel information; and identify the sensing reporting associated with the sensing task based on the session association information to send the sensing reporting to the CN via the transport tunnel associated with the PDU session.
[0024] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive, from the CN, a PDU session setup request to establish the PDU session between the UE and the CN; then receive, from the CN, a sensing session setup request to establish a sensing session associated with the PDU session, including one or multiple of: ID of the sensing session, ID allocated by the CN to identify the sensing session within the CN in a direct interface between the CN and the NE, or uplink tunnel information allocated by the CN, and the sensing session setup request further includes session association information used to associate the PDU session with the sensing session or the transport tunnel, including one or multiple of: IDs of sensing reception UEs for the sensing task or PDU session IDs for the sensing task; send, to the CN, a sensing session setup response, including one or multiple of: ID of the sensing session, ID allocated by the NE to identify the sensing session within the NE in the direct interface between the CN and the NE, or downlink tunnel information allocated by the NE; and identify the sensing reporting associated with the sensing task based on the session association information to send the sensing reporting to the CN via the transport tunnel associated with the PDU session.
[0025] In some implementations of the methods and apparatuses described herein, the at least one processor is configured to further cause the NE to: receive NE related configuration of configuring the NE to act as a sensing reception NE; determine sensing data associated with the sensing task available at the NE; and send the sensing data to the CN via a transport tunnel identified by the uplink tunnel information allocated by the CN.
[0026] Some implementations of the methods and apparatuses described herein may further include a method performed by a UE, which may include: receive, from a RAN node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; and send, to the RAN node, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.BRIEF DESCRIPTION OF THE DRAWINGS
[0027] Figure 1 illustrates an example of a wireless communications system in accordance with aspects of the present disclosure.
[0028] Figure 2 illustrates an example of UP based protocol stack for ISAC in accordance with aspects of the present disclosure.
[0029] Figure 3 illustrates an example of sensing data transmission procedure under scheme#1 in accordance with aspects of the present disclosure.
[0030] Figure 4 illustrates an example of sensing data transmission procedure under scheme#2 in accordance with aspects of the present disclosure.
[0031] Figure 5 illustrates an example of a UE in accordance with aspects of the present disclosure.
[0032] Figure 6 illustrates an example of a processor in accordance with aspects of the present disclosure.
[0033] Figure 7 illustrates an example of a NE in accordance with aspects of the present disclosure.
[0034] Figure 8 illustrates a flowchart of method performed by a UE in accordance with aspects of the present disclosure.
[0035] Figure 9 illustrates a flowchart of method performed by a NE in accordance with aspects of the present disclosure.DETAILED DESCRIPTION
[0036] Integrated sensing and communication (ISAC) is regarded as one of the key features and technological advancements in certain types of wireless communications (e.g., 5G-A and 6G etc. ) . It can be extensively applied in numerous industrial and daily scenarios, ranging from unmanned aerial vehicle (UAV) detection and management, environmental monitoring, to intelligent transportation and health care. Moreover, in recent years, low-altitude economy, which relies on UAV, has shown promising development, and there is an urgent need to promote the commercial use of sensing to guarantee UAV detection and management.
[0037] Based on user and industrial requirements, there are some fundamental scenarios in ISAC, e.g., area-based sensing and object-based sensing. Regarding area-based sensing, it is to monitor and sense the target environment or area for the desired information, such as the traffic load, weather report, human respiration status etc., for smart transportation and smart home deployment. Regarding object-based sensing, it is to sense, identify, monitor, and track the sensing object (or target object) within a certain area, for example, monitoring illegal UAV intrusion etc. The sensing object is with signal transmission capability or not. In each scenario, UE may be configured to act as a sensing reception device (or sensing reception node or the like) to receive reflected sensing signals, determine or collect sensing data (or sensing measurement results etc. ) and send the sensing data to the network side, e.g., to the CN via RAN. Such a procedure involves when and how to establish the PDU session for sensing data transmission from the UE and how to efficiently transmit the sensing data from RAN to CN etc., which has not been settled.
[0038] To support data transmission in ISAC or the like, various aspects of the present disclosure propose that for a sensing task (or sensing session) , the CN, e.g., a sensing function (SF) or the like may determine (or select) one or multiple UEs to act as sensing reception UEs, or provide a plurality of candidate sensing reception UEs for RAN and the RAN may determine one or multiple sensing reception UEs from the plurality of candidate sensing reception UEs. A PDU session associated with the sensing task may be established before or after the UE is indicated or configured to act as a sensing reception UE, while the DRB associated with the PDU session is established or activated after the UE is configured to act as a sensing reception UE for the sensing task. For example, in the case that the PDU session for a sensing task (or sensing session) is established before the UE is configured to act as a sensing reception UE, the DRB associated with the PDU session will be established after the UE is configured to act as a sensing reception UE for the sensing task, or keep inactive until the UE is configured to act as the sensing reception UE. In the case that the PDU session for a sensing task is established after the UE is configured to act as a sensing reception UE for the sensing task, the DRB (s) associated with the PDU session will also be established after the UE is configured to be a sensing reception UE for the sensing task. For example, the RAN side may provide the PDU session related information and DRB related configuration together to the UE after UE is configured to act as a sensing reception UE. Accordingly, various aspects of the present disclosure would balance radio resource maintenance at UE side and PDU session establishment delay.
[0039] On the other hand, one sensing reception UE is associated with one PDU session, and one sensing reception UE may act as a sensing reception UE for one or multiple sensing tasks. In addition, one PDU session may correspond to one transport tunnel for transmitting sensing data or sensing measurement results etc., between RAN node and CN. In the case that there are multiple sensing reception devices involved in the same sensing task, e.g., multiple sensing reception UEs, there will be multiple transport tunnels between the RAN node and the CN for the same sensing task. To improve transmission efficiency, some aspects of the present disclosure propose that a single transport tunnel can be associated with multiple PDU sessions, which may be for the same sensing tasks or different sensing tasks, such a transport tunnel may be referred to as a common transport tunnel or shared transport tunnel or the like. In the case that the RAN node is also a sensing reception device for a sensing task, the sensing data determined at the RAN node may also be sent via the common transport tunnel for the sensing task.
[0040] Aspects of the present disclosure are described in the context of a wireless communications system.
[0041] Figure 1 illustrates an example of a wireless communications system 100 in accordance with aspects of the present disclosure. The wireless communications system 100 may include one or more NE 102, one or more UE 104, and a core network (CN) 106. The wireless communications system 100 may support various radio access technologies. In some implementations, the wireless communications system 100 may be a 4G network, such as an LTE network or an LTE-Advanced (LTE-A) network. In some other implementations, the wireless communications system 100 may be a NR network, such as a 5G network, a 5G-Advanced (5G-A) network, or a 5G ultrawideband (5G-UWB) network. In other implementations, the wireless communications system 100 may be a combination of a 4G network and a 5G network, or other suitable radio access technology including Institute of Electrical and Electronics Engineers (IEEE) 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20. The wireless communications system 100 may support radio access technologies beyond 5G, for example, 6G. Additionally, the wireless communications system 100 may support technologies, such as time division multiple access (TDMA) , frequency division multiple access (FDMA) , or code division multiple access (CDMA) , etc.
[0042] The one or more NE 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the NE 102 described herein may be or include or may be referred to as a network node, a base station, a network element, a network function, a network entity, a radio access network (RAN) , a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. An NE 102 and a UE 104 may communicate via a communication link, which may be a wireless or wired connection. For example, an NE 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface.
[0043] An NE 102 may provide a geographic coverage area for which the NE 102 may support services for one or more UEs 104 within the geographic coverage area. For example, an NE 102 and a UE 104 may support wireless communication of signals related to services (e.g., voice, video, packet data, messaging, broadcast, etc. ) according to one or multiple radio access technologies. In some implementations, an NE 102 may be moveable, for example, a satellite associated with a non-terrestrial network (NTN) . In some implementations, different geographic coverage areas 112 associated with the same or different radio access technologies may overlap, but the different geographic coverage areas may be associated with different NE 102. In some embodiments, the NEs 102 may include one or more relay nodes, integrated access and backhaul (IAB) nodes or wireless access backhaul (WAB) nodes which can provide wireless access services for UEs 104. A relay node (or an IAB node or a WAB node) can directly connect to a BS or hop through one or more relay nodes (or one or more IAB or WAB nodes) before reaching the BS.
[0044] The one or more UE 104 may be dispersed throughout a geographic region of the wireless communications system 100. A UE 104 may include or may be referred to as a remote unit, a mobile device, a wireless device, a remote device, a subscriber device, a transmitter device, a receiver device, or some other suitable terminology. In some implementations, the UE 104 may be referred to as a unit, a station, a terminal, or a client, among other examples. Additionally, or alternatively, the UE 104 may be referred to as an Internet-of-Things (IoT) device, an Internet-of-Everything (IoE) device, or machine-type communication (MTC) device, among other examples.
[0045] A UE 104 may be able to support wireless communication directly with other UEs 104 over a communication link. For example, a UE 104 may support wireless communication directly with another UE 104 over a device-to-device (D2D) communication link. In some implementations, such as vehicle-to-vehicle (V2V) deployments, vehicle-to-everything (V2X) deployments, or cellular-V2X deployments, the communication link 114 may be referred to as a sidelink. For example, a UE 104 may support wireless communication directly with another UE 104 over a PC5 interface.
[0046] An NE 102 may support communications with the CN 106, or with another NE 102, or both. For example, an NE 102 may interface with other NE 102 or the CN 106 through one or more backhaul links (e.g., S1, N2, N3, or network interface) . In some implementations, the NE 102 may communicate with each other directly. In some other implementations, the NE 102 may communicate with each other indirectly (e.g., via the CN 106) . In some implementations, one or more NE 102 may include subcomponents, such as an access network entity, which may be an example of an access node controller (ANC) . An ANC may communicate with the one or more UEs 104 through one or more other access network transmission entities, which may be referred to as a radio heads, smart radio heads, or transmission-reception points (TRPs) .
[0047] The CN 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The CN 106 may be an evolved packet core (EPC) , or a 5G core (5GC) , which may include a control plane entity that manages access and mobility (e.g., a mobility management entity (MME) , an access and mobility management functions (AMF) ) and a user plane entity that routes packets or interconnects to external networks (e.g., a serving gateway (S-GW) , a Packet Data Network (PDN) gateway (P-GW) , or a user plane function (UPF) ) . In some implementations, the control plane entity may manage non-access stratum (NAS) functions, such as mobility, authentication, and bearer management (e.g., data bearers, signal bearers, etc. ) for the one or more UEs 104 served by the one or more NE 102 associated with the CN 106.
[0048] The CN 106 may communicate with a packet data network over one or more backhaul links (e.g., via an S1, N2, N3, or another network interface) . The packet data network may include an application server. In some implementations, one or more UEs 104 may communicate with the application server. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the CN 106 via an NE 102. The CN 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server using the established session (e.g., the established PDU session) . The PDU session may be an example of a logical connection between the UE 104 and the CN 106 (e.g., one or more network functions of the CN 106) .
[0049] In the wireless communications system 100, the NEs 102 and the UEs 104 may use resources of the wireless communications system 100 (e.g., time resources (e.g., symbols, slots, subframes, frames, or the like) or frequency resources (e.g., subcarriers, carriers) ) to perform various operations (e.g., wireless communications) . In some implementations, the NEs 102 and the UEs 104 may support different resource structures. For example, the NEs 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the NEs 102 and the UEs 104 may support a single frame structure. In some other implementations, such as in 5G and among other suitable radio access technologies, the NEs 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The NEs 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0050] One or more numerologies may be supported in the wireless communications system 100, and a numerology may include a subcarrier spacing and a cyclic prefix. A first numerology (e.g., μ=0) may be associated with a first subcarrier spacing (e.g., 15 kHz) and a normal cyclic prefix. In some implementations, the first numerology (e.g., μ=0) associated with the first subcarrier spacing (e.g., 15 kHz) may utilize one slot per subframe. A second numerology (e.g., μ=1) may be associated with a second subcarrier spacing (e.g., 30 kHz) and a normal cyclic prefix. A third numerology (e.g., μ=2) may be associated with a third subcarrier spacing (e.g., 60 kHz) and a normal cyclic prefix or an extended cyclic prefix. A fourth numerology (e.g., μ=3) may be associated with a fourth subcarrier spacing (e.g., 120 kHz) and a normal cyclic prefix. A fifth numerology (e.g., μ=4) may be associated with a fifth subcarrier spacing (e.g., 240 kHz) and a normal cyclic prefix.
[0051] A time interval of a resource (e.g., a communication resource) may be organized according to frames (also referred to as radio frames) . Each frame may have a duration, for example, a 10 millisecond (ms) duration. In some implementations, each frame may include multiple subframes. For example, each frame may include 10 subframes, and each subframe may have a duration, for example, a 1 ms duration. In some implementations, each frame may have the same duration. In some implementations, each subframe of a frame may have the same duration.
[0052] Additionally or alternatively, a time interval of a resource (e.g., a communication resource) may be organized according to slots. For example, a subframe may include a number (e.g., quantity) of slots. The number of slots in each subframe may also depend on the one or more numerologies supported in the wireless communications system 100. For instance, the first, second, third, fourth, and fifth numerologies (i.e., μ=0, μ=1, μ=2, μ=3, μ=4) associated with respective subcarrier spacings of 15 kHz, 30 kHz, 60 kHz, 120 kHz, and 240 kHz may utilize a single slot per subframe, two slots per subframe, four slots per subframe, eight slots per subframe, and 16 slots per subframe, respectively. Each slot may include a number (e.g., quantity) of symbols (e.g., OFDM symbols) . In some implementations, the number (e.g., quantity) of slots for a subframe may depend on a numerology. For a normal cyclic prefix, a slot may include 14 symbols. For an extended cyclic prefix (e.g., applicable for 60 kHz subcarrier spacing) , a slot may include 12 symbols. The relationship between the number of symbols per slot, the number of slots per subframe, and the number of slots per frame for a normal cyclic prefix and an extended cyclic prefix may depend on a numerology. It should be understood that reference to a first numerology (e.g., μ=0) associated with a first subcarrier spacing (e.g., 15 kHz) may be used interchangeably between subframes and slots.
[0053] In the wireless communications system 100, an electromagnetic (EM) spectrum may be split, based on frequency or wavelength, into various classes, frequency bands, frequency channels, etc. By way of example, the wireless communications system 100 may support one or multiple operating frequency bands, such as frequency range designations FR1 (410 MHz –7.125 GHz) , FR2 (24.25 GHz –52.6 GHz) , FR3 (7.125 GHz –24.25 GHz) , FR4 (52.6 GHz –114.25 GHz) , FR4a or FR4-1 (52.6 GHz –71 GHz) , and FR5 (114.25 GHz –300 GHz) . In some implementations, the NEs 102 and the UEs 104 may perform wireless communications over one or more of the operating frequency bands. In some implementations, FR1 may be used by the NEs 102 and the UEs 104, among other equipment or devices for cellular communications traffic (e.g., control information, data) . In some implementations, FR2 may be used by the NEs 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0054] FR1 may be associated with one or multiple numerologies (e.g., at least three numerologies) . For example, FR1 may be associated with a first numerology (e.g., μ=0) , which includes 15 kHz subcarrier spacing; a second numerology (e.g., μ=1) , which includes 30 kHz subcarrier spacing; and a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing. FR2 may be associated with one or multiple numerologies (e.g., at least 2 numerologies) . For example, FR2 may be associated with a third numerology (e.g., μ=2) , which includes 60 kHz subcarrier spacing; and a fourth numerology (e.g., μ=3) , which includes 120 kHz subcarrier spacing.
[0055] For BS based sensing in ISAC, a sensing BS (e.g., RAN node or NE or the like) can act as different roles and support multiple sensing modes, e.g., monostatic sensing mode where the same BS sends the sensing signals and receives the reflected sensing signals, BS bi-static sensing mode where different BSs respectively send sensing signals and receive the reflected sensing signals, and BS-UE bi-static sensing mode where BS sends sensing signals and UE receives the reflected sensing signals or UE sends sensing signals and BS receives the reflected sensing signals.
[0056] It is similar at the UE side, and the UE can act as a sensing reception device in some sensing modes, e.g., transmission-reception point (TRP) -UE bi-static sensing mode or BS-UE bi-static sensing mode etc. For example, the network, e.g., a RAN node may transmit sensing signals, and the UE detects or receives the reflected sensing signal to perform either area-based sensing or object-based sensing etc. When the UE collects the sensing data or sensing measurement results, the UE may send them to the network, e.g., by a sensing reporting. In some cases, the sensing reporting with sensing data or sensing measurement results etc., is transmitted over a PDU session between the sensing reception UE and CN, e.g., user plane function (UPF) , which may be referred to as user plane (UP) based sensing data transmission.
[0057] Figure 2 illustrates an example of UP based protocol stack for ISAC in accordance with aspects of the present disclosure.
[0058] Referring to Figure 2, according to the exemplary UP based protocol stack, non-access stratum (NAS) messages for sensing service or sensing data / sensing measurement results for sensing service are carried by PDU sessions, and one PDU session for sensing services is established between one sensing reception UE and the UPF or the like. The PDU session will be mapped into (or associated with) a DRB between the sensing reception UE and BS, e.g., between the access strum (AS) layers of the UE and BS, and mapped to a single transport tunnel, e.g., GPRS tunneling protocol user plane (GTP-U) tunnel between the BS and UPF. IP routing between the UPF and sensing function (SF) or the like for sensing services in the CN is over service-based interface (SBI) , IP connection, or application programming interface (API) etc.
[0059] However, if the PDU session and the corresponding DRB are established prior to the UE is configured (or indicated or determined or selected or the like) to act as a sensing reception UE, it would cause unnecessary to maintain the radio resources for the DRB. It would also a waste of UE capability and processing, e.g., to maintain radio link control (RLC) or media access control (MAC) entity for the DRB. On the other hand, if the PDU session and the corresponding DRB are established after the UE is configured to act as a sensing reception UE, it may cause an extra delay for establishing the PDU session if the time of configuring the UE to act as a sensing reception UE is improper.
[0060] Given that, various aspects of the present disclosure propose DRB establishment based on sensing indication related information associated with a sensing task, which indicates that the UE is configured to act as a sensing reception UE for the sensing task in an explicit manner or implicit manner. Regarding the PDU session for the sensing task, it may be established before or after the UE is configured to act as a sensing reception UE.
[0061] Specifically, in some cases (scheme#1) , a PDU session establishment procedure for a sensing task (it is also named as a sensing session) may be triggered before UE is indicated to act as a sensing reception UE and UE receives PDU session related information from RAN before the UE is indicated to act as a sensing reception UE. For example, in some implementations of the present disclosure, UE may receive DRB related configuration when or after the UE is configured to act as a sensing reception UE, e.g., implicitly by sensing session related configuration for the sensing task. After receiving the DRB related configuration, the UE will accordingly establish the DRB based on the DRB related configuration. In some implementations of the present disclosure, UE may also receive DRB related configuration before UE is configured to act as a sensing reception UE, e.g., received together with the PDU session related information. However, the DRB related configuration includes inactivation indication information, indicating that DRBs for the PDU session will be inactive until the UE is configured to act as a sensing reception UE or the like. Then, the UE will keep the DRB inactive until the UE is configured to act as a sensing reception UE, e.g., implicitly by sensing session related configuration for the sensing task and / or explicitly by an activation indication to activate the DRB in inactive state for the PDU session or the like.
[0062] In some cases (scheme#2) , a PDU session establishment procedure for the sensing task may be triggered after UE is configured to act as a sensing reception UE and UE receives PDU session related information from RAN after the UE is configured or indicated to act as a sensing reception . To reduce the delay for establishing the PDU session, various aspects of the present disclosure propose that, for a sensing task, CN may provide candidate related information indicating a plurality of candidate sensing reception UEs for RAN, and the RAN may select or determine one or multiple UEs as the sensing reception UEs for the sensing task, and configure the UEs to act as sensing reception UEs. At the UE side, UE may be indicated to act as a sensing reception implicitly by sensing session related configuration for the sensing task, URSP assistance information of the PDU session, or a request of triggering the PDU session establishment procedure, and / or explicitly indicated by a sensing indication indicating the UE to act as a sensing reception UE or the like. UE may also receive DRB related configuration when or after UE is indicated to act as a sensing reception UE, and establish the DRB based on the DRB related configuration accordingly.
[0063] Moreover, currently, the trigger of PDU session establishment is either by UE or by CN. In the case that the sensing reception UE is selected by the RAN side, how to trigger the PDU session establishment is also solved in the present disclosure.
[0064] More detailed implementations in accordance with various aspects of the present disclosure will be illustrated in the following respectively in view of scheme#1 and scheme#2.
[0065] Persons skilled in the art would understand a UE may be a sensing reception device for one or multiple sensing tasks or sessions, one or multiple sensing reception devices (UEs, and RAN node or entity etc. ) may be for the same sensing task, and multiple sensing reception UEs for the same sensing task or sensing session, may belong to the same RAN or different RANs. Although only one RAN node and UE, e.g., RAN#1 and UE#1 are illustrated based on a sensing task as an example herein, persons skilled in the art would understand how to apply the solutions disclosure in the present disclosure in scenarios involving multiple sensing tasks, multiple sensing reception UEs, multiple RANs or a combination thereof.
[0066] Figure 3 illustrates an example of sensing data transmission procedure under scheme#1 in accordance with aspects of the present disclosure. Considering that the present disclosure is interested in the internal architecture of CN, herein only SF is separate shown and other possibly involved CN nodes or functions are shown together as "other NF (s) . "
[0067] Referring to Figure 3, herein, it is assumed that part or all UEs served by a RAN node, e.g., UE#1 served by RAN#1 is authorized as a sensing reception UE or is selected as a candidate sensing reception UE.
[0068] For example, the UE may be authorized to act as a sensing reception UE according to its subscription information during a UE registration procedure, e.g., by an AMF or the like. In some cases, if the UE is authorized to act as a sensing reception UE, it means that the UE is a candidate sensing reception UE for potential or specific sensing task (s) . In some cases, whether an authorized UE is a candidate sensing reception UE for potential or specific sensing task (s) may be further determined by the CN, e.g., the SF or the like.
[0069] At step 301, the UE may trigger a PDU session establishment procedure towards the network to establish a PDU session for sensing data transmission, e.g., by sending a PDU session establishment request to the CN, e.g., to the AMF or session management function (SMF) etc. The PDU session establishment request may include sensing related information or parameters, e.g., the data network name (DNN) and / or single network slice selection assistance information (S-NSSAI) for the sensing related PDU session.
[0070] For example, in some cases, the UE may trigger a PDU session establishment procedure in the case that the UE is authorized to act as a sensing reception UE, e.g., in the case of receiving an authorization of sensing reception UE in a registration accept message or the like from the AMF or the like.
[0071] In some cases, the UE may trigger a PDU session establishment procedure in the case that the UE is selected as a candidate sensing reception UE, e.g., in the case of receiving a message indicating that the UE is selected as a candidate sensing reception UE from the SF or the like, e.g., by a candidate sensing reception device indication or the like.
[0072] In some cases, the CN, e.g., SF or the like may request (or indicate or the like) the UE to trigger a PDU session establishment procedure, which may also be considered as the CN indirectly triggers a PDU session establishment procedure. For example, in the case that the UE is authorized to act as a sensing reception UE or selected as a candidate sensing reception UE, the SF may send user plane information or URSP assistance information of the PDU session to be established, e.g., IP address and / or fully qualified domain name (FQDN) etc., to the UE via a downlink (DL) NAS transport message of the AMF or the like. Based on the received URSP assistance information, the UE may use URSP which includes UP based sensing related PDU session parameters, e.g., DNN and / or S-NSSAI etc., to establish a PDU session used for sensing data transmission.
[0073] At the CN side, after receiving the PDU session establishment request, the CN side may send a PDU session setup request to the RAN node at step 303. The CN may indicate the RAN node to defer the establishment of DRB associated with the PDU session or keep the DRB associated with the PDU session in inactive state until the UE is configured to act as a sensing reception UE.
[0074] For example, in accordance with some aspects of the present disclosure, the CN side may explicitly or implicitly indicate the RAN side to defer the establishment of DRBs associated with the PDU session until the UE is configured to act as a sensing reception UE. An exemplary PDU session setup request message may include but not limited to part or all of: explicit deferment indication information, e.g., a deferment indication, indicating that the DRBs for this PDU session will be deferred to be established; implicit deferment information, e.g., an indication related to whether the UE is selected as a sensing reception UE or the PDU session is for sensing purposes etc.; sensing related PDU session indication information, indicating that the PDU session is for sensing services, e.g., explicitly by an indication or implicitly by the PDU session ID etc.; the quality of service (QoS) parameters of the QoS flows of the PDU session or the QoS parameters of the PDU session; and NAS PDU for the PDU session, e.g., PDU session establishment accept message–NAS PDU etc.
[0075] Based on the PDU session setup request from the CN, the RAN node may send PDU session related information to the UE at step 305. In some cases, the RAN node may also send to the UE the explicit or implicit deferment indication information, indicating that the DRB for this PDU session will be deferred to be established.
[0076] After receiving the PDU session related information, at step 307, the UE may store the PDU session related information, e.g., PDU session ID and forward the NAS PDU of the PDU session to higher layer (e.g., NAS layer etc. ) . The UE AS layer may also indicate to UE NAS layer that the DRB for this PDU session has not been established yet.
[0077] When the CN, e.g., SF or the like decides to establish a sensing session or sensing task (just as an example for simplification and clarity, it is possible to establish multiple sensing tasks together) , the SF or the like may send a sensing session setup request (or sensing session establishment request) to the RAN at step 309, including sensing session related configuration (or sensing task related configuration or the like) for the sensing task or sensing session and ID of the established PDU session associated with the sensing session.
[0078] In some implementations of the present disclosure, the SF or the like may select one or multiple UEs as sensing reception UEs for the sensing task from the candidate sensing reception UEs or from the authorized sensing reception UEs. When a UE, e.g., UE#1 is selected as a sensing reception UE for the sensing session, an exemplary sensing session setup request message may further include ID of the UE, e.g., S-temporary mobile subscriber identity (S-TMSI) , cell-RNTI (C-RNTI) , or next generation application protocol (NGAP) associated UE ID etc.
[0079] In some implementations of the present disclosure, the SF or the like may provide IDs of a plurality of candidate sensing reception UEs for the sensing task to the RAN node, e.g., in the sensing session setup request. The RAN node may select the UE associated with the PDU session as a sensing reception UE for the sensing task, e.g., according to radio condition of the UE and the supported sensing frequency of the UE etc.
[0080] After receiving the sensing session setup request from the SF, the RAN node may provide the sensing session related configuration of the sensing task or session to the UE at step 311, e.g., via a radio resource control (RRC) configuration, which implicitly indicates that the UE is configured to act as a sensing reception UE for the sensing task or session. An exemplary sensing session related configuration may include ID of the sensing task or session and sensing signal reception related configuration etc.
[0081] The RAN node may also provide DRB related configuration of the DRB for the sensing task, e.g., in the RRC configuration. The DRB related configuration may include the associated PDU session ID, DRB ID, QoS flows to DRB mapping information, and packet data convergence protocol (PDCP) , RLC, MAC and physical (PHY) related configuration etc. Based on the DRB related configuration, the UE will establish the DRB associated with the PDU session established for the sensing task.
[0082] In accordance with some aspects of the present disclosure, the CN side may explicitly or implicitly indicate the RAN side to keep DRBs associated with the PDU session for the UE inactive until the UE is configured to act as a sensing reception UE. An exemplary PDU session setup request message may include but not limited to part or all of: explicit inactivation indication information, e.g., an inactivation indication, indicating that the DRB for this PDU session will be inactive until the UE is configured to act as a sensing reception UE;implicit inactivation information, e.g., an indication related to whether the UE is selected as a sensing reception UE or the PDU session is for sensing purposes etc.; sensing related PDU session indication information, indicating that the PDU session is for sensing services, e.g., explicitly by an indication or implicitly by the PDU session ID etc.; the QoS parameters of the QoS flows of the PDU session or the QoS parameters of the PDU session; and NAS PDU for the PDU session, e.g., PDU session establishment accept message–NAS PDU etc.
[0083] Based on the PDU session setup request from the CN, the RAN node may send PDU session related information and DRB related configuration of the DRB associated with the PDU session to the UE at step 305. An exemplary DRB related configuration may include the ID of the associated PDU session, DRB ID, QoS flows to DRB mapping or association information, and PDCP, RLC, MAC and PHY related configuration etc. The DRB related configuration may also include inactivation indication information, which may indicate that the DRB for the PDU session will be in inactive state until the UE is configured to act as a sensing reception UE in an explicit manner or implicit manner, e.g., indicating that the DRB related configuration is inactive or the PDU session is established with inactive DRB for sensing purpose etc. The inactive DRB or DRB in an inactive state means that UE shall not establish any entity of the DRB at all; or establish part or all entities of the DRB, but suspend the established entities, suspend data transmission over part or all entities of the DRB and / or not monitoring PDCCH addressing to a RNTI dedicated to the DRB etc. That is, even if the entities of the DRB in inactive state are established, UE needs not to maintain radio resources for the DRB.
[0084] After receiving the PDU session related information and DRB related configuration, at step 307, the UE may store the PDU session related information, e.g., PDU session ID and forward the NAS PDU of the PDU session to higher layer (e.g., NAS layer etc. ) . For the inactive DRB related configuration, in some cases, the UE may only store or keep the DRB related configuration or DRB context (including the DRB related configuration) without establishing the entities of the DRB. In some cases, besides storing the DRB related configuration or DRB context, the UE may also establish the PDCP entity but suspend the PDCP entity for the DRB, establish the RLC and MAC entities of the DRB, suspend data transmission for the DRB, e.g., suspend data transmission over the RLC and MAC entities of the DRB, and / or not monitor PDCCH addressing to a RNTI dedicated to the DRB for sensing services etc.
[0085] When the CN, e.g., SF or the like decides to establish a sensing session or sensing task (just as an example for simplification and clarity, it is possible to establish multiple sensing tasks together) , the SF or the like may send a sensing session setup request to the RAN at step 309, including sensing session related configuration (or sensing task related configuration or the like) for the sensing task or sensing session and ID of the established PDU session associated with the sensing session. Similarly, the SF or the like may select one or multiple UEs as sensing reception UEs for the sensing task; or provide IDs of a plurality of candidate sensing reception UEs for the RAN node, and it is assumed that the RAN node selects the UE associated with the PDU session as a sensing reception UE for the sensing task.
[0086] After receiving the sensing session setup request message from the SF, the RAN node may provide the sensing session related configuration for the sensing task to the UE at step 311, e.g., via a RRC configuration.
[0087] At step 313, the UE may activate the DRB in inactive state in the case of receiving the associated sensing session related configuration, which implicitly indicates that the UE is configured to act as a sensing reception UE for the sensing task. In some cases, the RAN node may provide an activation indication to the UE, e.g., also in the RRC configuration, which explicitly indicates the UE to activate the inactive DRB for the PDU session. The UE may activate the DRB in the case of receiving the activation indication.
[0088] For example, if part or all entities of the DRB, e.g., PDCP, RLC, and MAC etc., entities are not established, activating the DRB includes establishing the unestablished entities of the DRB according to the stored DRB related configuration. If the entities of the DRB have been established while been suspended or the data transmission over some entities is suspended, activating the DRB includes resuming the suspended entities, and / or suspended data transmission for the DRB etc. If UE does not monitor PDCCH addressing to the RNTI dedicated to the DRB in active state, activating the DRB also means that UE will start to monitor PDCCH addressing to the RNTI dedicated to the DRB.
[0089] Based on sensing session related configuration, e.g., sensing signal reception related configuration etc., UE will receive reflected sensing signals, determine sensing data, and send the sensing data via a sensing reporting to the CN via the PDU session. For example, UE may transmit the sensing reporting for a sensing task to the RAN via the DRB associated with the PDU session for the sensing task, and the RAN may transmit the sensing reporting to the CN, e.g., to UPF via the transport tunnel, e.g., GTP-U tunnel associated with the PDU session, and then the UPF may rout the sensing report to the SF or the like.
[0090] The transport tunnel is only associated with the single PDU session as legacy, or associated with multiple PDU sessions including the PDU session as a common transport tunnel. The common transport tunnel may be for sensing data transmission between the RAN node and all sensing reception UEs of the same sensing task or different sensing tasks (e.g., all sensing tasks associated with the RAN node) . Accordingly, session association information used to associate the PDU session with the sensing session or the transport tunnel will be provided for the RAN node.
[0091] Compared with legacy transport tunnel solution, when a common transport tunnel is applied, the main differences or supplementary details are illustrated below based on the above illustrated procedure.
[0092] For example, when the SF or the like sends the sensing session setup request to the RAN node at step 309, the sensing session setup request may include but not limited to part or all of: ID of the sensing session, ID allocated by the CN to identify the sensing session within the CN in a direct interface between the CN and the RAN node, e.g., SF allocated interface ID for the sensing session, and uplink (UL) tunnel information allocated by the CN, e.g., UL GTP-U tunnel information allocated by the CN. If the common transport tunnel is used for all sensing tasks associated with the RAN node, the sensing session ID may not be included. Exemplary uplink tunnel information allocated by the CN may include but not limited to IP address and / or TEID of the common transport tunnel.
[0093] The SF or the like may also send session association information to the RAN node, e.g., in the sensing session setup request. The session association information may include but not limited to part or all of IDs of sensing reception UEs for the sensing task and PDU session IDs for the sensing task etc.
[0094] After receiving the sensing session setup request, the RAN node may send a sensing session setup response to the SF or the like at step 310. The sensing session setup response may include but not limited to part or all of: ID of the sensing session, ID allocated by the RAN node to identify the sensing session within the RAN in the direct interface between the CN and the RAN node, e.g., RAN allocated interface ID for the sensing session, and downlink tunnel information, e.g., DL GTP-U tunnel information allocated by the RAN node etc. Similarly, if the common transport tunnel is used for all sensing tasks associated with the RAN nodes, the sensing session ID may not be included. Exemplary downlink tunnel information allocated by the RAN node may include but not limited to IP address and / or TEID of the common transport tunnel.
[0095] When the RAN node receives a sensing reporting from a sensing reception UE, e.g., UE#1, the RAN node may identify the sensing reporting associated with the sensing task based on the session association information between the PDU session and sensing session. The RAN node may send the sensing reporting to the CN via the transport tunnel identified by the UL GTP-U tunnel information or the like allocated by the CN. In some cases, in order to distinguish different UEs and PDU sessions for the same sensing task, the RAN node may include the associated UE ID, PDU session ID or both in the GTP-U header or GTP-U extension header of the GTP-U tunnel.
[0096] In some scenarios, the RAN node may also act as a sending reception device for the sensing task, e.g., by the entire RAN node or NE, or an entity of the RAN node, e.g. distributed unit (DU) , or TRP etc. When the sensing data associated with the sensing task is available at the RAN node, the RAN node may send the sensing data to the CN also via the common transport tunnel (or similar to legacy) , e.g., identified by the UL GTP-U tunnel information allocated by the CN sensing node. In some cases, the RAN node may include the ID of the RAN node, e.g., BS ID, DU ID or TRP ID in the GTP-U header or GTP-U extension header of the GTP-U tunnel of the sensing session to distinguish different RAN nodes or entities etc., that collected the sensing data.
[0097] Figure 4 illustrates an example of sensing data transmission procedure under scheme#2 in accordance with aspects of the present disclosure. Similarly, herein only SF is separate shown and other possibly involved CN nodes or functions are shown together as "other NF (s) . " Main differences between scheme #1 and scheme#2 are related to the establishment of PDU session and the associated DRB, thus some details of scheme#2 are the same as or similar to those illustrated in view of Figure 3, and will not repeat.
[0098] Referring to Figure 4, similarly, it is also assumed that part or all UEs served by a RAN node or NE, e.g., UE#1 served by RAN#1 is authorized as a sensing reception UE or is selected as a candidate sensing reception UE (for a specific sensing task or not) .
[0099] When the CN, e.g., the SF or the like decides to establish a sensing session or sensing task (just as an example for simplification and clarity, it is possible to establish multiple sensing tasks together) , the SF or the like may send a sensing session setup request to the RAN node at step 401, including sensing session related configuration for the sensing task or sensing session. For example, in the case that the transport tunnel for the sensing session is a common transport tunnel, the sensing session setup request may include but not limited to part or all of: ID of the sensing session, ID allocated by the CN (e.g., by SF or the like) to identify the sensing session within the CN in a direct interface between the CN and the RAN node, and uplink tunnel information allocated by the CN, e.g., UL GTP-U tunnel information allocated by the CN (e.g., the SF or the like) etc. If the common transport tunnel is used for all sensing tasks associated with the RAN nodes, the sensing session ID may not be included.
[0100] The SF or the like may also provide candidate related information for the RAN node, e.g., in the sensing session setup request, which indicates a plurality of candidate sensing reception UEs for the sensing task, e.g., by a list of candidate sensing reception UE IDs.
[0101] In some cases, the SF or the like may also provide URSP assistance information (or user plane information) of the PDU session to be established for the sensing session for the RAN node, e.g., in the sensing session setup request. The URSP assistance information may include but not limited to the IP address or FQDN of the PDU session to be established for the sensing session, or both.
[0102] In response to the sensing session setup request, the RAN node may send a sensing session setup response to the SF or the like at step 403. For example, in the case that the transport tunnel for the sensing session is a common transport tunnel, the sensing session setup response may include but not limited to part or all of: ID of the sensing session, ID allocated by the RAN node to identify the sensing session within the RAN node in the direct interface between the CN and the RAN node, and downlink tunnel information, e.g., DL GTP-U tunnel information allocated by the RAN node etc. Similarly, if the common transport tunnel is used for all sensing tasks associated with the RAN nodes, the sensing session ID may not be included.
[0103] On the other hand, the RAN node may select one or multiple UEs as the sensing reception UEs for the sensing task, e.g., according to radio conditions of each candidate sensing reception UE and the supported sensing frequency of each candidate sensing reception UE etc. For each sensing reception UE selected for the sensing task, the RAN node may provide sensing session related configuration of the sensing task to the UE at step 405, including but not limited to sensing session ID and sensing signal reception related configuration etc. In some cases, the RAN node may further provide a sensing indication, e.g., together with the sensing session related configuration, explicitly or implicitly indicating that the UE is configured to act as a sensing reception UE for the sensing task.
[0104] In the case that the RAN node receives the URSP assistance information from the CN, e.g., in the sensing session setup request, the RAN node may also provide the URSP assistance information for the UE, e.g., with sensing session related configuration of the sensing task.
[0105] The UE may trigger a PDU session establishment procedure at step 407, which may happen in various cases.
[0106] In some implementations of the present disclosure, the UE may trigger a PDU session establishment procedure based on the indication from the RAN node.
[0107] For example, when the UE, e.g., UE AS layer receives the sensing session related configuration, or the sensing indication, or both, the UE AS layer may indicate the UE NAS layer that the UE is configured to act as a sensing reception UE for the sensing task. Accordingly, the UE will trigger a PDU session establishment procedure, e.g., by sending a NAS PDU–PDU session establishment request to the network. In the case of receiving the URSP assistance information, the UE may use URSP, which includes user plane sensing related PDU session parameters, e.g., DNN and / or S-NSSAI dedicated for sensing related PDU session to establish a PDU session used for the sensing task.
[0108] In some implementations of the present disclosure, the UE may trigger a PDU session establishment procedure based on the request or indication from the CN.
[0109] For example, at step 404, after selecting the sensing reception UEs, the RAN node may notify the selected sensing reception UEs to the CN, e.g., to the SF or the like. In some cases, at step 406, for a selected sensing reception UE, e.g., UE#1, the CN, e.g., the SF or the like may request or indicate the sensing reception UE to trigger a PDU session establishment procedure. For example, the SF or the like may send to the UE the URSP assistance information of the PDU session to be established for the sensing session, e.g., via a DL NAS transport message of the AMF or the like.
[0110] On the other hand, after receiving the PDU session establishment request, the CN side may send a PDU session setup request to the RAN at step 409, and the RAN node may send PDU session related information to the UE at step 411 based on the PDU session setup request. In the case that the transport tunnel associated with the PDU session is a common transport tunnel, the PDU session setup request may further include session association information used to associate the PDU session with the sensing session or the transport tunnel, including but not limited to part or all of: sensing session ID, the ID allocated by the CN to identify the sensing session, the ID allocated by the RAN node to identify the sensing session, the uplink tunnel information, e.g., UL GTP-U tunnel information allocated by the CN, and the downlink tunnel information, e.g., DL GTP-U tunnel information allocated by the RAN node etc.
[0111] The RAN node may also send DRB related configuration for DRB associated with the PDU session to the UE, e.g., together with the PDU session related information in a RRC configuration. Based on the DRB related configuration, the UE may establish the DRB for the PDU session at step 413. When the UE has sensing data associated with the sensing task to be reported to the network side, the UE may send a sensing reporting to the CN via the PDU session, e.g., first from the UE to the RAN node via the DRB associated with the PDU session, then from the RAN node to the UPF via the transport tunnel associated with the PDU session and the UPF may route the sensing reporting to the SF.
[0112] Figure 5 illustrates an example of a UE 500 in accordance with aspects of the present disclosure. The UE 500 may include a processor 502, a memory 504, a controller 506, and a transceiver 508. The processor 502, the memory 504, the controller 506, or the transceiver 508, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
[0113] The processor 502, the memory 504, the controller 506, or the transceiver 508, or various combinations or components thereof may be implemented in hardware (e.g., circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
[0114] The processor 502 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 502 may be configured to operate the memory 504. In some other implementations, the memory 504 may be integrated into the processor 502. The processor 502 may be configured to execute computer-readable instructions stored in the memory 504 to cause the UE 500 to perform various functions of the present disclosure.
[0115] The memory 504 may include volatile or non-volatile memory. The memory 504 may store computer-readable, computer-executable code including instructions when executed by the processor 502 cause the UE 500 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as the memory 504 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
[0116] In some implementations, the processor 502 and the memory 504 coupled with the processor 502 may be configured to cause the UE 500 to perform one or more of the functions described herein (e.g., executing, by the processor 502, instructions stored in the memory 504) . For example, the processor 502 may support wireless communication at the UE 500 in accordance with examples as disclosed herein. The UE 500 may be configured to support a means for receiving, from a RAN node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; and a means for sending, to the RAN node, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.
[0117] The controller 506 may manage input and output signals for the UE 500. The controller 506 may also manage peripherals not integrated into the UE 500. In some implementations, the controller 506 may utilize an operating system such as or other operating systems. In some implementations, the controller 506 may be implemented as part of the processor 502.
[0118] In some implementations, the UE 500 may include at least one transceiver 508. In some other implementations, the UE 500 may have more than one transceiver 508. The transceiver 508 may represent a wireless transceiver. The transceiver 508 may include one or more receiver chains 510, one or more transmitter chains 512, or a combination thereof.
[0119] A receiver chain 510 may be configured to receive signals (e.g., control information, data and packets) over a wireless medium. For example, the receiver chain 510 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 510 may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receiver chain 510 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 510 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.
[0120] A transmitter chain 512 may be configured to generate and transmit signals (e.g., control information, data and packets) . The transmitter chain 512 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmitter chain 512 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 512 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
[0121] Figure 6 illustrates an example of a processor 600 in accordance with aspects of the present disclosure. The processor 600 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 600 may include a controller 602 configured to perform various operations in accordance with examples as described herein. The processor 600 may optionally include at least one memory 604, which may be, for example, an L1 / L2 / L3 cache. Additionally, or alternatively, the processor 600 may optionally include one or more arithmetic-logic units (ALUs) 606. One or more of these components may be in electronic communication or otherwise coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces (e.g., buses) .
[0122] The processor 600 may be a processor chipset and include a protocol stack (e.g., a software stack) executed by the processor chipset to perform various operations (e.g., receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) in accordance with examples as described herein. The processor chipset may include one or more cores, one or more caches (e.g., memory local to or included in the processor chipset (e.g., the processor 600) or other memory (e.g., random access memory (RAM) , read-only memory (ROM) , dynamic RAM (DRAM) , synchronous dynamic RAM (SDRAM) , static RAM (SRAM) , ferroelectric RAM (FeRAM) , magnetic RAM (MRAM) , resistive RAM (RRAM) , flash memory, phase change memory (PCM) , and others) .
[0123] The controller 602 may be configured to manage and coordinate various operations (e.g., signaling, receiving, obtaining, retrieving, transmitting, outputting, forwarding, storing, determining, identifying, accessing, writing, reading) of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. For example, the controller 602 may operate as a control unit of the processor 600, generating control signals that manage the operation of various components of the processor 600. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0124] The controller 602 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 604 and determine subsequent instruction (s) to be executed to cause the processor 600 to support various operations in accordance with examples as described herein. The controller 602 may be configured to track memory address of instructions associated with the memory 604. The controller 602 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 602 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 600 to cause the processor 600 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 602 may be configured to manage flow of data within the processor 600. The controller 602 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 600.
[0125] The memory 604 may include one or more caches (e.g., memory local to or included in the processor 600 or other memory) , such as RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementations, the memory 604 may reside within or on a processor chipset (e.g., local to the processor 600) . In some other implementations, the memory 604 may reside external to the processor chipset (e.g., remote to the processor 600) .
[0126] The memory 604 may store computer-readable, computer-executable code including instructions that, when executed by the processor 600, cause the processor 600 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as system memory or another type of memory. The controller 602 and / or the processor 600 may be configured to execute computer-readable instructions stored in the memory 604 to cause the processor 600 to perform various functions. For example, the processor 600 and / or the controller 602 may be coupled with or to the memory 604, the processor 600, the controller 602, and the memory 604 may be configured to perform various functions described herein. In some examples, the processor 600 may include multiple processors and the memory 604 may include multiple memories. One or more of the multiple processors may be coupled with one or more of the multiple memories, which may, individually or collectively, be configured to perform various functions herein.
[0127] The one or more ALUs 606 may be configured to support various operations in accordance with examples as described herein. In some implementations, the one or more ALUs 606 may reside within or on a processor chipset (e.g., the processor 600) . In some other implementations, the one or more ALUs 606 may reside external to the processor chipset (e.g., the processor 600) . One or more ALUs 606 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 606 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 606 may be configured with a variety of logical and arithmetic circuits, including adders, subtractors, shifters, and logic gates, to process and manipulate the data according to the operation. Additionally, or alternatively, the one or more ALUs 606 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 606 to handle conditional operations, comparisons, and bitwise operations.
[0128] The processor 600 may support wireless communication in accordance with examples as disclosed herein. The processor 600 may be configured to or operable to support a means for receiving, from a RAN node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; and a means for sending, to the RAN node, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.
[0129] Figure 7 illustrates an example of a NE 700 in accordance with aspects of the present disclosure. The NE 700 may include a processor 702, a memory 704, a controller 706, and a transceiver 708. The processor 702, the memory 704, the controller 706, or the transceiver 708, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. These components may be coupled (e.g., operatively, communicatively, functionally, electronically, electrically) via one or more interfaces.
[0130] The processor 702, the memory 704, the controller 706, or the transceiver 708, or various combinations or components thereof may be implemented in hardware (e.g., circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , or other programmable logic device, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure.
[0131] The processor 702 may include an intelligent hardware device (e.g., a general-purpose processor, a DSP, a CPU, an ASIC, an FPGA, or any combination thereof) . In some implementations, the processor 702 may be configured to operate the memory 704. In some other implementations, the memory 704 may be integrated into the processor 702. The processor 702 may be configured to execute computer-readable instructions stored in the memory 704 to cause the NE 700 to perform various functions of the present disclosure.
[0132] The memory 704 may include volatile or non-volatile memory. The memory 704 may store computer-readable, computer-executable code including instructions when executed by the processor 702 cause the NE 700 to perform various functions described herein. The code may be stored in a non-transitory computer-readable medium such as the memory 704 or another type of memory. Computer-readable media includes both non-transitory computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A non-transitory storage medium may be any available medium that may be accessed by a general-purpose or special-purpose computer.
[0133] In some implementations, the processor 702 and the memory 704 coupled with the processor 702 may be configured to cause the NE 700 to perform one or more of the functions described herein (e.g., executing, by the processor 702, instructions stored in the memory 704) . For example, the processor 702 may support wireless communication at the NE 700 in accordance with examples as disclosed herein. The NE 700 may be configured to support a means for sending, to a UE, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; a means for receiving, from the UE, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of sending the sensing indication related information; and a means for sending, to a CN, the sensing reporting via a transport tunnel, wherein the transport tunnel is only associated with the PDU session or associated with multiple PDU sessions including the PDU session, and part or all of the multiple PDU sessions are associated with the sensing task or different sensing tasks.
[0134] The controller 706 may manage input and output signals for the NE 700. The controller 706 may also manage peripherals not integrated into the NE 700. In some implementations, the controller 706 may utilize an operating system such as or other operating systems. In some implementations, the controller 706 may be implemented as part of the processor 702.
[0135] In some implementations, the NE 700 may include at least one transceiver 708. In some other implementations, the NE 700 may have more than one transceiver 708. The transceiver 708 may represent a wireless transceiver. The transceiver 708 may include one or more receiver chains 710, one or more transmitter chains 712, or a combination thereof.
[0136] A receiver chain 710 may be configured to receive signals (e.g., control information, data and packets) over a wireless medium. For example, the receiver chain 710 may include one or more antennas for receive the signal over the air or wireless medium. The receiver chain 710 may include at least one amplifier (e.g., a low-noise amplifier (LNA) ) configured to amplify the received signal. The receiver chain 710 may include at least one demodulator configured to demodulate the receive signal and obtain the transmitted data by reversing the modulation technique applied during transmission of the signal. The receiver chain 710 may include at least one decoder for decoding the demodulated signal to receive the transmitted data.
[0137] A transmitter chain 712 may be configured to generate and transmit signals (e.g., control information, data and packets) . The transmitter chain 712 may include at least one modulator for modulating data onto a carrier signal, preparing the signal for transmission over a wireless medium. The at least one modulator may be configured to support one or more techniques such as amplitude modulation (AM) , frequency modulation (FM) , or digital modulation schemes like phase-shift keying (PSK) or quadrature amplitude modulation (QAM) . The transmitter chain 712 may also include at least one power amplifier configured to amplify the modulated signal to an appropriate power level suitable for transmission over the wireless medium. The transmitter chain 712 may also include one or more antennas for transmitting the amplified signal into the air or wireless medium.
[0138] Figure 8 illustrates a flowchart of a method in accordance with aspects of the present disclosure. The operations of the method may be implemented by a UE as described herein. In some implementations, the UE may execute a set of instructions to control the function elements of the UE to perform the described functions.
[0139] At step 801, the method may include receiving, from a RAN node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE. The operations of step 801 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of 801 may be performed by a UE as described with reference to Figure 5.
[0140] At step 803, the method may include sending, to the RAN node, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information. The operations of step 803 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of step 803 may be performed by a UE as described with reference to Figure 5.
[0141] It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.
[0142] Figure 9 illustrates a flowchart of a method in accordance with aspects of the present disclosure. The operations of the method may be implemented by a NE as described herein. In some implementations, the NE may execute a set of instructions to control the function elements of the NE to perform the described functions.
[0143] At step 901, the method may include sending, to a UE, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE. The operations of step 901 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of step 901 may be performed by a NE as described with reference to Figure 7.
[0144] At step 903, the method may include receiving, from the UE, a sensing reporting associated with the sensing task via a DRB associated with a PDU session for the sensing task, wherein the DRB is established or activated in the case of sending the sensing indication related information. The operations of step 903 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of step 903 may be performed by a NE as described with reference to Figure 7.
[0145] At step 905, the method may include sending, to a CN, the sensing reporting via a transport tunnel, wherein the transport tunnel is only associated with the PDU session or associated with multiple PDU sessions including the PDU session, and part or all of the multiple PDU sessions are associated with the sensing task or different sensing tasks. The operations of step 905 may be performed in accordance with examples as described herein. In some implementations, aspects of the operations of step 905 may be performed by a NE as described with reference to Figure 7.
[0146] It should be noted that the method described herein describes a possible implementation, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible.
[0147] The description herein is provided to enable a person having ordinary skill in the art to make or use the disclosure. Various modifications to the disclosure will be apparent to a person having ordinary skill in the art, and the generic principles defined herein may be applied to other variations without departing from the scope of the disclosure. Thus, the disclosure is not limited to the examples and designs described herein but is to be accorded the broadest scope consistent with the principles and novel features disclosed herein.
Claims
1.A user equipment (UE) for wireless communication, comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the UE to:receive, from a radio access network (RAN) node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; andsend, to the RAN node, a sensing reporting associated with the sensing task via a data radio bearer (DRB) associated with a protocol data unit (PDU) session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.2.The UE of claim 1, wherein the at least one processor is configured to further cause the UE to trigger a PDU session establishment procedure for the PDU session in a case of:receiving authorization for the UE of acting as a sensing reception UE from a core network (CN) ;receiving a message initiating that the UE is a candidate sensing reception UE from a CN; orreceiving a request of triggering the PDU session establishment procedure from a CN.3.The UE of claim 1, wherein the sensing indication related information comprises sensing session related configuration for the sensing task, and the at least one processor is configured to further cause the UE to:receive PDU session related information for the PDU session from the RAN node before receiving the sensing session related configuration; andreceive, from the RAN node, DRB related configuration for the DRB together with the sensing session related configuration or after receiving the sensing session related configuration; andestablish the DRB based on the DRB related configuration.4.The UE of claim 3, wherein the at least one processor is configured to further cause the UE to:receive deferment indication information together with the PDU session related information, indicating that establishment of DRBs for the PDU session will be deferred until the UE is configured to act as a sensing reception UE.5.The UE of claim 1, wherein the sensing indication related information comprises one or multiple of sensing session related configuration for the sensing task or an activation indication indicating to activate DRBs in inactive state for the PDU session, and the at least one processor is configured to further cause the UE to:receive PDU session related information for the PDU session and DRB related configuration for the DRB from the RAN node before receiving the sensing indication related information, wherein the DRB related configuration includes inactivation indication information indicating that DRBs for the PDU session will be inactive until the UE is configured to act as a sensing reception UE;keep the DRB in the inactive state until receiving the sensing indication related information; andactivate the DRB in the inactive state in the case of receiving the sensing indication related information.6.The UE of claim 5, wherein keeping the DRB in the inactive state comprises not establishing entities of the DRB, and activating the DRB in the inactive state comprises establishing the entities of the DRB based on the DRB related configuration.7.The UE of claim 5, whereinkeeping the DRB in the inactive state comprises:establishing the entities of the DRB based on the DRB related configuration, and one or multiple of: suspending part or all of established entities, suspending data transmission for the DRB, or not monitoring physical downlink control channel (PDCCH) addressing to a radio network temporary identifier (RNTI) dedicated to the DRB; andactivating the DRB in the inactive state comprises one or multiple of:resuming suspended entities, resuming suspended data transmission for the DRB, and / or monitoring PDCCH addressing to the RNTI dedicated to the DRB.8.The UE of claim 1, wherein the at least one processor is configured to further cause the UE to:trigger a PDU session establishment procedure for the PDU session in the case of receiving the sensing indication related information;receive PDU session related information for the PDU session and DRB related configuration for the DRB from the RAN node; andestablish the DRB based on the DRB related configuration.9.The UE of claim 1, wherein the sensing indication related information comprises one or multiple of:sensing session related configuration for the sensing task;a sensing indication indicating the UE to act as a sensing reception UE;UE route selection policy (URSP) assistance information of the PDU session; ora request of triggering the PDU session establishment procedure.10.A processor for wireless communication, comprising:at least one controller coupled with at least one memory and configured to cause the processor to:receive, from a radio access network (RAN) node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; andsend, to the RAN node, a sensing reporting associated with the sensing task via a data radio bearer (DRB) associated with a protocol data unit (PDU) session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.11.A network equipment (NE) for wireless communication, comprising:at least one memory; andat least one processor coupled with the at least one memory and configured to cause the NE to:send, to a user equipment (UE) , sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE;receive, from the UE, a sensing reporting associated with the sensing task via a data radio bearer (DRB) associated with a protocol data unit (PDU) session for the sensing task, wherein the DRB is established or activated in the case of sending the sensing indication related information; andsend, to a core network (CN) , the sensing reporting via a transport tunnel, wherein the transport tunnel is only associated with the PDU session or associated with multiple PDU sessions including the PDU session, and part or all of the multiple PDU sessions are associated with the sensing task or different sensing tasks.12.The NE of claim 11, wherein the sensing indication related information comprises sensing session related configuration for the sensing task, and the at least one processor is configured to further cause the NE to:receive, from the CN, a PDU session setup request for the PDU session with deferment indication information, indicating that establishment of DRBs for the PDU session will be deferred until the UE is configured to act as a sensing reception UE; andsend, to the UE, PDU session related information for the PDU session based on the PDU session setup request before sending the sensing indication related information.13.The NE of claim 12, wherein the at least one processor is configured to further cause the NE to:receive, from the CN, a sensing session setup request to indicate the sensing session related configuration; andsend, to the UE, DRB related configuration for the DRB together with the sensing session related configuration or after sending the sensing session related configuration.14.The UE of claim 11, wherein the sensing indication related information comprises one or multiple of sensing session related configuration for the sensing task or an activation indication to activate DRBs in active state for the PDU session, and the at least one processor is configured to further cause the NE to:receive, from the CN, a PDU session setup request for the PDU session with inactivation indication information, indicating that DRBs for the PDU session will be inactive until the UE is configured to act as a sensing reception UE; andsend, to the UE, PDU session related information for the PDU session and DRB related configuration for the DRB based on the PDU session setup request before sending the sensing indication related information, wherein the DRB related configuration includes the inactivation indication information.15.The NE of claim 14, wherein the at least one processor is configured to further cause the NE to:receive, from the CN, a sensing session setup request to indicate the sensing session related configuration, or the sensing session related configuration and activation indication, wherein the sensing indication related information is sent based on the sensing session setup request.16.The NE of claim 13 or 15, wherein the sensing session setup request comprises candidate related information indicating a plurality of candidate sensing reception UEs, and the at least one processor is configured to further cause the NE to:determine one or multiple UEs including the UE from the plurality of candidate sensing reception UEs as sensing reception UEs for the sensing task indicated in the sensing session setup request.17.The NE of claim 11, wherein the sensing indication related information comprises one or multiple of sensing session related configuration for the sensing task or a sensing indication indicating the UE to act as a sensing reception UE, and the at least one processor is configured to further cause the NE to:receive, from the CN, candidate related information indicating a plurality candidate sensing reception UEs;determine one or multiple UEs including the UE from the plurality of candidate sensing reception UEs as sensing reception UEs for the sensing task; andsend the sensing session related configuration with or without the sensing indication to the one or multiple UEs.18.The NE of claim 11, wherein the at least one processor is configured to further cause the NE to:receive UE route selection policy (URSP) assistance information of the PDU session from the CN; andsend the URSP assistance information to the UE.19.The NE of claim 11, wherein the at least one processor is configured to further cause the NE to:receive, from the CN, a sensing session setup request to establish a sensing session associated with the PDU session, including one or multiple of: identification (ID) of the sensing session, ID allocated by the CN to identify the sensing session within the CN in a direct interface between the CN and the NE, or uplink tunnel information allocated by the CN;send, to the CN, a sensing session setup response, including one or multiple of: ID of the sensing session, ID allocated by the NE to identify the sensing session within the NE in the direct interface between the CN and the NE, or downlink tunnel information allocated by the NE;then, receive, from the CN, a PDU session setup request to establish the PDU session between the UE and the CN, wherein the PDU session setup request includes session association information used to associate the PDU session with the sensing session or the transport tunnel, including one or multiple of: the sensing session ID, the ID allocated by the CN to identify the sensing session, the ID allocated by the NE to identify the sensing session, the uplink tunnel information or the downlink tunnel information; andidentify the sensing reporting associated with the sensing task based on the session association information to send the sensing reporting to the CN via the transport tunnel associated with the PDU session.20.A method performed by a user equipment (UE) , comprising:receiving, from a radio access network (RAN) node, sensing indication related information associated with a sensing task, indicating the UE to act as a sensing reception UE; andsending, to the RAN node, a sensing reporting associated with the sensing task via a data radio bearer (DRB) associated with a protocol data unit (PDU) session for the sensing task, wherein the DRB is established or activated in the case of receiving the sensing indication related information.