Transmission and reception of sensing reference signal
Patent Information
- Application Number
- PCT/CN2025/129375
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2025-10-22
- Publication Date
- 2026-08-27
Smart Images

Figure CN2025129375_27082026_PF_FP_ABST
Abstract
Description
TRANSMISSION AND RECEPTION OF SENSING REFERENCE SIGNALTECHNICAL FIELD
[0001] The present disclosure relates to wireless communications, and more specifically to network nodes and methods for supporting transmission and reception of sensing reference signal (RS) .BACKGROUND
[0002] A wireless communications system may include one or multiple network communication devices, such as base stations, which may be otherwise known as an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. Each network communication devices, such as a base station 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) . 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) ) .
[0003] 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) . 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, the 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.
[0004] For base station based sensing, sensing BS may act as different roles and three basic sensing modes may be supported, namely monostatic (same base station sends and receives the sensing signal) , base station bistatic (different base stations sends and receives the sensing signal) and base station-UE bistatic (base station sends and UE receives or UE sends and base station receives) .
[0005] Based on the user and industrial requirements, there may be two fundamental scenarios in ISAC, namely, area-based sensing and object-based sensing. Area-based sensing 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 the smart transportation and smart home deployment. Object-based sensing is to sense, identify, monitor, and track the target object within a certain area, for example, monitoring the illegal UAV intrusion. The sensing object may either be with signal transmission capability or not.
[0006] Some aspects of wireless communication may utilize object sensing. Certain types of object sensing may employ radar sensing, which may be designated as monostatic sensing and bistatic / multistatic sensing. For example, when sensing certain types of objects (such as UAVs) , object sensing or radar sensing may be used. In object or radar sensing, due to the irregular shape of the target object, the reflected signals may be unevenly distributed in all directions.
[0007] For object-based sensing, if a RAN node must continuously transmit sensing signals (e.g., sensing RS) over a specific beam or bandwidth, it will lead to unnecessary waste of radio resources. For instance, in scenarios such as detecting unauthorized drone intrusions, RAN nodes do not need to transmit sensing signals or detect reflected signals at all times. Another case is that the RAN node uses a sparse radio resource to detect the object. Once the object is detected, the RAN node increases more radio resource e.g., for tracking the object.
[0008] Thus, a method supporting on-demand sensing RS needs to be developed to balance radio resource efficiency with the satisfaction of sensing Quality of Service (QoS) requirements.SUMMARY
[0009] The present disclosure relates to UE, RAN node, core network (CN) node and methods that support transmission and reception of sensing RS. With the UE, RAN node, CN node devices and methods, balance between radio resource efficiency and the satisfaction of sensing QoS requirements may be achieved.
[0010] Some implementations of a UE described herein may include a processor and a transceiver coupled to the processor, wherein the processor is configured to: receive, via the transceiver from a core network (CN) node, a set of pre-defined sensing RS configurations for RAN nodes; transmit, via the transceiver, a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations; receive the pre-defined sensing RS configuration via the transceiver; and apply the pre-defined sensing RS configuration for receiving sensing RS.
[0011] In some implementations, the pre-defined sensing RS configuration is one of the following: the pre-defined sensing RS configuration for a serving RAN node for the UE, and the pre-defined sensing RS configuration for a neighbor RAN node of the serving RAN node.
[0012] In some implementations, the pre-defined sensing RS configuration comprises at least one of the following: an identity (ID) of the pre-defined sensing RS configuration, an ID of the RAN node, start time of the pre-defined sensing RS configuration, or a duration of the pre-defined sensing RS configuration.
[0013] In some implementations, the processor is configured to transmit the request for the pre-defined sensing RS configuration by: determining whether at least one radio condition is fulfilled; and based on determining that the at least one radio condition is fulfilled, transmit, via the transceiver to a serving RAN node of the UE, the request for the pre-defined sensing RS configuration for a neighbor RAN node of the serving RAN node.
[0014] In some implementations, the request comprises at least one of the following: an ID of the RAN node, an ID of the pre-defined sensing RS configuration, start time of the pre-defined sensing RS configuration, or a duration of the pre-defined sensing RS configuration.
[0015] Some implementations of a RAN node described herein may include a processor and a transceiver coupled to the processor, wherein the processor is configured to:transmit, via the transceiver to a CN node, information related to sensing RS configurations supported by the RAN node; and receive a set of pre-defined sensing RS configurations via the transceiver from the CN node.
[0016] In some implementations, the information related to sensing RS configurations supported by the RAN node comprises at least one of the following: a first indication indicating whether the RAN node can act as a sensing transmission node, at least one transmission periodicity of a sensing RS supported by the RAN node, at least one transmission bandwidth of the sensing RS supported by the RAN node, a second indication indicating whether the RAN node can act as a sensing reception node, at least one reception periodicity of a reflected sensing RS supported by the RAN node, or at least one reception bandwidth of a reflected sensing RS supported by the RAN node.
[0017] In some implementations, the set of pre-defined sensing RS configurations comprises a first pre-defined sensing RS configuration for a sensing transmission node.
[0018] In some implementations, the first pre-defined sensing RS configuration for the sensing transmission node comprises at least one of the following: an ID of the first pre-defined sensing RS configuration for the sensing transmission node, a transmission periodicity of a sensing RS or a sensing RS set, an offset of the sensing RS, or a transmission bandwidth of the sensing RS or the sensing RS set.
[0019] In some implementations, the set of pre-defined sensing RS configurations comprises a second pre-defined sensing RS configuration for a sensing reception node.
[0020] In some implementations, the second pre-defined sensing RS configuration for the sensing reception node comprises at least one of the following: an ID of the second pre-defined sensing RS configuration for the sensing reception node, a reception periodicity of a reflected sensing RS or a reflected sensing RS set, an offset of the reflected sensing RS, or a reception bandwidth of the reflected sensing RS or the reflected sensing RS set.
[0021] In some implementations, the RAN node acts as a sensing reception node. In such implementations, the set of pre-defined sensing RS configurations comprises a third pre-defined sensing RS configuration for a neighbor RAN node acting as a sensing transmission node.
[0022] In some implementations, the processor is further configured to: transmit, via the transceiver to the CN node, a request for a pre-defined sensing RS configuration in the set of pre-defined sensing RS configurations; receive the pre-defined sensing RS configuration via the transceiver from the CN node; and apply the pre-defined sensing RS configuration for transmitting or receiving sensing RS.
[0023] In some implementations, the request comprises at least one of the following: an ID of the RAN node, an ID of the pre-defined sensing RS configuration, start time of the sensing RS, or a duration of the sensing RS.
[0024] In some implementations, the pre-defined sensing RS configuration comprises at least one of the following: an ID of the pre-defined sensing RS configuration for the second RAN node, start time of the pre-defined sensing RS configuration, or a duration of the pre-defined sensing RS configuration.
[0025] In some implementations, the processor is further configured to: receive an initial sensing RS configuration via the transceiver from the CN node; and based on determining that a duration of the pre-defined sensing RS configuration expires, switch to the initial sensing RS configuration.
[0026] Some implementations of a CN node described herein may include a processor and a transceiver coupled to the processor, wherein the processor is configured to: receive, via the transceiver from a RAN node, information related to sensing RS configurations supported by the RAN node; and transmit a set of pre-defined sensing RS configurations via the transceiver to the RAN node or a UE.
[0027] In some implementations, the information related to sensing RS configurations supported by the RAN node comprises at least one of the following: a first indication indicating whether the RAN node can act as a sensing transmission node, at least one transmission periodicity of a sensing RS supported by the RAN node, at least one transmission bandwidth of the sensing RS supported by the RAN node, a second indication indicating whether the RAN node can act as a sensing reception node, at least one reception periodicity of a reflected sensing RS supported by the RAN node, or at least one reception bandwidth of a reflected sensing RS supported by the RAN node.
[0028] In some implementations, the set of pre-defined sensing RS configurations comprises a first pre-defined sensing RS configuration for a sensing transmission node.
[0029] In some implementations, the first pre-defined sensing RS configuration for the sensing transmission node comprises at least one of the following: an ID of the first pre-defined sensing RS configuration for the sensing transmission node, a transmission periodicity of a sensing RS or a sensing RS set, an offset of the sensing RS, or a transmission bandwidth of the sensing RS or the sensing RS set.
[0030] In some implementations, the set of pre-defined sensing RS configurations comprises a second pre-defined sensing RS configuration for a sensing reception node.
[0031] In some implementations, the second pre-defined sensing RS configuration for the sensing reception node comprises at least one of the following: an ID of the second pre-defined sensing RS configuration for the sensing reception node, a reception periodicity of a reflected sensing RS or a reflected sensing RS set, an offset of the reflected sensing RS, or a reception bandwidth of the reflected sensing RS or the reflected sensing RS set.
[0032] In some implementations, the RAN node acts as a sensing reception node. In such implementations, the set of pre-defined sensing RS configurations comprises a third pre-defined sensing RS configuration for a neighbor RAN node acting as a sensing transmission node.
[0033] In some implementations, the processor is further configured to: receive, via the transceiver from the RAN node, a request for a pre-defined sensing RS configuration in the set of pre-defined sensing RS configurations; and transmit the pre-defined sensing RS configuration via the transceiver to the RAN node.
[0034] In some implementations, the request comprises at least one of the following: an ID of the RAN node, an ID of the pre-defined sensing RS configuration, start time of the sensing RS, or a duration of the sensing RS.
[0035] In some implementations, the pre-defined sensing RS configuration comprises at least one of the following: an ID of the pre-defined sensing RS configuration for the second RAN node, start time of the pre-defined sensing RS configuration, or a duration of the pre-defined sensing RS configuration.
[0036] In some implementations, the processor is further configured to: before transmitting the set of pre-defined sensing RS configurations, transmit an initial sensing RS configuration via the transceiver to the RAN node.
[0037] Some implementations of a method described herein may include: receiving a set of pre-defined sensing RS configurations for RAN nodes from a CN node; transmitting a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations; receiving the pre-defined sensing RS configuration; and applying the pre-defined sensing RS configuration for receiving sensing RS.
[0038] Some implementations of a method described herein may include: transmitting, to a CN node, information related to sensing RS configurations supported by the RAN node; and receiving a set of pre-defined sensing RS configurations from the CN node.
[0039] Some implementations of a method described herein may include: receiving, from a RAN node, information related to sensing RS configurations supported by the RAN node; and transmitting a set of pre-defined sensing RS configurations to the RAN node or a UE.
[0040] Some implementations of a processor described herein may include at least one memory and a controller coupled with the at least one memory and configured to cause the controller to: receive, via the transceiver from a CN node, a set of pre-defined sensing RS configurations for RAN nodes; transmit, via the transceiver, a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations; receive the pre-defined sensing RS configuration via the transceiver; and apply the pre-defined sensing RS configuration for receiving sensing RS.
[0041] Some implementations of a processor described herein may include at least one memory and a controller coupled with the at least one memory and configured to cause the controller to: transmit, via the transceiver to a CN node, information related to sensing RS configurations supported by the RAN node; and receive a set of pre-defined sensing RS configurations via the transceiver from the CN node.
[0042] Some implementations of a processor described herein may include at least one memory and a controller coupled with the at least one memory and configured to cause the controller to: receive, via the transceiver from a RAN node, information related to sensing RS configurations supported by the RAN node; and transmit a set of pre-defined sensing RS configurations via the transceiver to the RAN node or a UE.
[0043] It is to be understood that the summary section is not intended to identify key or essential features of embodiments of the present disclosure, nor is it intended to be used to limit the scope of the present disclosure. Other features of the present disclosure will become easily comprehensible through the following description.BRIEF DESCRIPTION OF THE DRAWINGS
[0044] Fig. 1 illustrates an example of a wireless communications system that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure;
[0045] Figs. 2A, 2B, 2C and 2D illustrate another example of a wireless communications system that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure, respectively;
[0046] Figs. 3, 4 and 5 illustrate a flowchart of a method that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure, respectively;
[0047] Figs. 6 and 7 illustrate a signaling diagram illustrating an example process that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure, respectively;
[0048] Fig. 8 illustrates an example of a device that supports transmission and reception of sensing RS in accordance with some aspects of the present disclosure; and
[0049] Fig. 9 illustrates an example of a processor that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure.DETAILED DESCRIPTION
[0050] Principles of the present disclosure will now be described with reference to some embodiments. It is to be understood that these embodiments are described only for the purpose of illustration and help those skilled in the art to understand and implement the present disclosure, without suggesting any limitation as to the scope of the disclosure. The disclosure described herein may be implemented in various manners other than the ones described below.
[0051] In the following description and claims, unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skills in the art to which this disclosure belongs.
[0052] References in the present disclosure to “one embodiment, ” “an example embodiment, ” “an embodiment, ” “some embodiments, ” and the like indicate that the embodiment (s) described may include a particular feature, structure, or characteristic, but it is not necessary that every embodiment includes the particular feature, structure, or characteristic. Moreover, such phrases do not necessarily refer to the same embodiment (s) . Further, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is submitted that it is within the knowledge of one skilled in the art to affect such feature, structure, or characteristic in connection with other embodiments whether or not explicitly described.
[0053] It shall be understood that although the terms “first” and “second” or the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element could also be termed as a second element, and similarly, a second element could also be termed as a first element, without departing from the scope of embodiments. As used herein, the term “and / or” includes any and all combinations of one or more of the listed terms.
[0054] The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments. As used herein, the singular forms “a” , “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms “comprises” , “comprising” , “has” , “having” , “includes” and / or “including” , when used herein, specify the presence of stated features, elements, and / or components etc., but do not preclude the presence or addition of one or more other features, elements, components and / or combinations thereof.
[0055] As described above, for object-based sensing, if a RAN node must continuously transmit sensing signals over a specific beam or bandwidth, it will lead to unnecessary waste of radio resources. Thus, a method supporting on-demand sensing RS needs to be developed to balance radio resource efficiency with the satisfaction of sensing Quality of Service (QoS) requirements.
[0056] In view of the above, the present disclosure provides a solution that supports transmission and reception of sensing RS. In this solution, a UE receives a set of pre-defined sensing RS configurations for radio RAN nodes. The UE transmits a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations. The UE receives the pre-defined sensing RS configuration. In turn, the UE applies the pre-defined sensing RS configuration for receiving sensing RS. With this solution, balance between radio resource efficiency and the satisfaction of sensing QoS requirements may be achieved.
[0057] Aspects of the present disclosure are described in the context of a wireless communications system.
[0058] Fig. 1 illustrates an example of a wireless communications system 100 that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. The wireless communications system 100 may include one at least one of network entities 102 (also referred to as network equipment (NE) ) , one or more terminal devices or UEs 104, a core network 106, and a packet data network 108. 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 5G network, such as an NR 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. 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.
[0059] The network entities 102 may be dispersed throughout a geographic region to form the wireless communications system 100. One or more of the network entities 102 described herein may be or include or may be referred to as a network node, a base station (BS) , a network element, a radio access network (RAN) node, a base transceiver station, an access point, a NodeB, an eNodeB (eNB) , a next-generation NodeB (gNB) , or other suitable terminology. A network entity 102 and a UE 104 may communicate via a communication link 110, which may be a wireless or wired connection. For example, a network entity 102 and a UE 104 may perform wireless communication (e.g., receive signaling, transmit signaling) over a Uu interface. The network entities 102 may be collectively referred to as network entities 102 or individually referred to as a network entity 102. Hereinafter, some implementations of the present disclosure will be described by taking a gNB as an example of the network entity 102. Thus, the network entity 102 may be used interchangeably with the gNB 102.
[0060] A network entity 102 may provide a geographic coverage area 112 for which the network entity 102 may support services (e.g., voice, video, packet data, messaging, broadcast, etc. ) for one or more UEs 104 within the geographic coverage area 112. For example, a network entity 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, a network entity 102 may be moveable, for example, a satellite associated with a non-terrestrial network. 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 112 may be associated with different network entities 102. Information and signals described herein may be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits, symbols, and chips that may be referenced throughout the description may be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0061] The one or more UEs 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 mobile device, a wireless device, a remote device, a remote unit, a handheld device, or a subscriber 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. In some implementations, a UE 104 may be stationary in the wireless communications system 100. In some other implementations, a UE 104 may be mobile in the wireless communications system 100.
[0062] The one or more UEs 104 may be devices in different forms or having different capabilities. Some examples of UEs 104 are illustrated in Fig. 1. A UE 104 may be capable of communicating with various types of devices, such as the network entities 102, other UEs 104, or network equipment (e.g., the core network 106, the packet data network 108, a relay device, an integrated access and backhaul (IAB) node, or another network equipment) , as shown in Fig. 1. Additionally, or alternatively, a UE 104 may support communication with other network entities 102 or UEs 104, which may act as relays in the wireless communications system 100.
[0063] A UE 104 may also be able to support wireless communication directly with other UEs 104 over a communication link 114. 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.
[0064] A network entity 102 may support communications with the core network 106, or with another network entity 102, or both. For example, a network entity 102 may interface with the core network 106 through one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The network entities 102 may communicate with each other over the backhaul links 116 (e.g., via an X2, Xn, or another network interface) . In some implementations, the network entities 102 may communicate with each other directly (e.g., between the network entities 102) . In some other implementations, the network entities 102 may communicate with each other or indirectly (e.g., via the core network 106) . In some implementations, one or more network entities 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) .
[0065] In some implementations, a network entity 102 may be configured in a disaggregated architecture, which may be configured to utilize a protocol stack physically or logically distributed among two or more network entities 102, such as an integrated access backhaul (IAB) network, an open radio access network (O-RAN) (e.g., a network configuration sponsored by the O-RAN Alliance) , or a virtualized RAN (vRAN) (e.g., a cloud RAN (C-RAN) ) . For example, a network entity 102 may include one or more of a CU, a DU, a radio unit (RU) , a RAN intelligent controller (RIC) (e.g., a near-real time RIC (Near-RT RIC) , a non-real time RIC (Non-RT RIC) ) , a service management and orchestration (SMO) system, or any combination thereof.
[0066] An RU may also be referred to as a radio head, a smart radio head, a remote radio head (RRH) , a remote radio unit (RRU) , or a transmission reception point (TRP) . One or more components of the network entities 102 in a disaggregated RAN architecture may be co-located, or one or more components of the network entities 102 may be located in distributed locations (e.g., separate physical locations) . In some implementations, one or more network entities 102 of a disaggregated RAN architecture may be implemented as virtual units (e.g., a virtual CU (VCU) , a virtual DU (VDU) , a virtual RU (VRU) ) .
[0067] Split of functionality between a CU, a DU, and an RU may be flexible and may support different functionalities depending upon which functions (e.g., network layer functions, protocol layer functions, baseband functions, radio frequency functions, and any combinations thereof) are performed at a CU, a DU, or an RU. For example, a functional split of a protocol stack may be employed between a CU and a DU such that the CU may support one or more layers of the protocol stack and the DU may support one or more different layers of the protocol stack. In some implementations, the CU may host upper protocol layer (e.g., an L3, an L2) functionality and signaling (e.g., radio resource control (RRC) , service data adaption protocol (SDAP) , packet data convergence protocol (PDCP) ) . The CU may be connected to one or more DUs or RUs, and the one or more DUs or RUs may host lower protocol layers, such as an L1 (e.g., physical (PHY) layer) or an L2 (e.g., radio link control (RLC) layer, medium access control (MAC) layer) functionality and signaling, and may each be at least partially controlled by the CU.
[0068] Additionally, or alternatively, a functional split of the protocol stack may be employed between a DU and an RU such that the DU may support one or more layers of the protocol stack and the RU may support one or more different layers of the protocol stack. The DU may support one or multiple different cells (e.g., via one or more RUs) . In some implementations, a functional split between a CU and a DU, or between a DU and an RU may be within a protocol layer (e.g., some functions for a protocol layer may be performed by one of a CU, a DU, or an RU, while other functions of the protocol layer are performed by a different one of the CU, the DU, or the RU) .
[0069] A CU may be functionally split further into CU control plane (CU-CP) and CU user plane (CU-UP) functions. A CU may be connected to one or more DUs via a midhaul communication link (e.g., F1, F1-c, F1-u) , and a DU may be connected to one or more RUs via a fronthaul communication link (e.g., open fronthaul (FH) interface) . In some implementations, a midhaul communication link or a fronthaul communication link may be implemented in accordance with an interface (e.g., a channel) between layers of a protocol stack supported by respective network entities 102 that are in communication via such communication links.
[0070] The core network 106 may support user authentication, access authorization, tracking, connectivity, and other access, routing, or mobility functions. The core network 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 network entities 102 associated with the core network 106.
[0071] The core network 106 may communicate with the packet data network 108 over one or more backhaul links 116 (e.g., via an S1, N2, N2, or another network interface) . The packet data network 108 may include an application server 118. In some implementations, one or more UEs 104 may communicate with the application server 118. A UE 104 may establish a session (e.g., a protocol data unit (PDU) session, or the like) with the core network 106 via a network entity 102. The core network 106 may route traffic (e.g., control information, data, and the like) between the UE 104 and the application server 118 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 core network 106 (e.g., one or more network functions of the core network 106) .
[0072] In the wireless communications system 100, the network entities 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 network entities 102 and the UEs 104 may support different resource structures. For example, the network entities 102 and the UEs 104 may support different frame structures. In some implementations, such as in 4G, the network entities 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 network entities 102 and the UEs 104 may support various frame structures (i.e., multiple frame structures) . The network entities 102 and the UEs 104 may support various frame structures based on one or more numerologies.
[0073] 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.
[0074] 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.
[0075] 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.
[0076] 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 network entities 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 network entities 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 network entities 102 and the UEs 104, among other equipment or devices for short-range, high data rate capabilities.
[0077] 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.
[0078] Fig. 2A illustrates another example of a wireless communications system 200A that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. As shown in Fig. 2A, the wireless communications system 200A may comprise a RAN node 210, a CN node 220 and a sensing object 212.
[0079] In some implementations, the RAN node 210 may be implemented as a nodeB e.g., gNB, a TRP or a DU.
[0080] In some implementations, the CN node 220 may be implemented as a node in the CN 106. For example, the CN node 220 may be implemented as a sensing function (SF) that is responsible for sensing session management in the CN 106.
[0081] In some implementations, the gNB-CU may be a logical node hosting RRC, SDAP and PDCP protocols of the gNB or RRC and PDCP protocols of the en-gNB that controls the operation of one or more gNB-DUs. The gNB-CU terminates the F1 interface connected to the gNB-DU.
[0082] In some implementations, the gNB-DU may be a logical node hosting RLC, MAC and PHY layers of the gNB or en-gNB, and its operation is partly controlled by gNB-CU. One gNB-DU supports one or multiple cells. One cell is supported by only one gNB-DU. The gNB-DU terminates the F1 interface connected with the gNB-CU.
[0083] In some embodiments, a first sensing mode may be performed in the wireless communications system 200A. The first sensing mode is also referred to as a monostatic sensing mode.
[0084] In some embodiments, in the first sensing mode, a sensing signal is transmitted by a RAN node and received or measured by the RAN node itself. In such embodiments, the RAN node 210 may be implemented as a sensing transmitter and a sensing receiver.
[0085] For example, in the wireless communications system 200A, the RAN node 210 transmits a sensing signal. The sensing signal is reflected by the sensing object 212. The RAN node 210 receives the reflected signal associated with the sensing signal. Hereinafter, the reflected signal associated with the sensing signal is also referred to as a reflected sensing RS.
[0086] In some embodiments, the sensing signal may also be referred to as a sensing RS. For example, the sensing signal may comprise at least one of the following: a new type of reference signal, a tracking reference signal (TRS) , a positioning reference signal (PRS) , or a channel state information reference signal (CSI-RS) .
[0087] Alternatively, the RAN node 210 may transmit a sensing signal set or a sensing signal burst.
[0088] Alternatively, the RAN node 210 may transmit a sensing RS set or a sensing RS burst.
[0089] Fig. 2B illustrates another example of a wireless communications system 200B that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure.
[0090] The wireless communications system 200B is different from the wireless communications system 200A in that the wireless communications system 200B may further comprise a RAN node 230.
[0091] In some implementations, each of the RAN node 210 and the RAN node 230 may be implemented as a gNB, a TRP or a DU.
[0092] In some implementations, the CN node 220 may be implemented as an SF that is responsible for sensing session management in the CN 106.
[0093] In some implementations, a second sensing mode may be performed in the wireless communications system 200B. The second sensing mode is also referred to as a BS bistatic mode.
[0094] In some implementations, in the second sensing mode, a sensing signal is transmitted by a RAN node and received or measured by another RAN node. In such implementations, the RAN node 210 may be implemented as a sensing transmitter and the RAN node 230 may be implemented as a sensing receiver.
[0095] For example, in the wireless communications system 200B, the RAN node 210 transmits a sensing signal. The sensing signal is reflected by the sensing object 212. The RAN node 230 receives the reflected signal associated with the sensing signal.
[0096] Fig. 2C illustrates another example of a wireless communications system 200C that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure.
[0097] The wireless communications system 200C is different from the wireless communications system 200A in that the wireless communications system 200C may further comprise the UE 104 and a RAN node 240.
[0098] In some implementations, each of the RAN node 210 and the RAN node 240 may be implemented as a gNB, a TRP or a DU.
[0099] In some implementations, the RAN node 240 may act as a neighbor RAN node of the RAN node 210. The UE 104 may perform a mobility procedure from a cell of the RAN node 210 to a cell of the RAN node 240.
[0100] In some implementations, the CN node 220 may be implemented as a CN node. For example, the CN node 220 may be implemented as an SF that is responsible for sensing session management in the CN 106.
[0101] In some implementations, a third sensing mode may be performed in the wireless communications system 200C. The third sensing mode is also referred to as a BS-UE bistatic mode.
[0102] In some implementations, in the third sensing mode, a sensing signal is transmitted by a RAN node and received or measured by the UE 104. In such implementations, the RAN node 210 or the RAN node 240 may be implemented as a sensing transmitter and the UE 104 may be implemented as a sensing receiver.
[0103] For example, in the wireless communications system 200C, the RAN node 210 or the RAN node 240 transmits a sensing signal. The sensing signal is reflected by the sensing object 212. The UE 104 receives the reflected signal associated with the sensing signal.
[0104] Fig. 2D illustrates another example of a wireless communications system 200D that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure.
[0105] As shown in Fig. 2D, the wireless communications system 200D may comprise the RAN node 210, the RAN node 230, the RAN node 240, the CN node 220 and the sensing object 212.
[0106] In some implementations, there may be sensing collaborations among the RAN node 210, the RAN node 230 and the RAN node 240, and the BS bistatic mode may be performed. In such implementations, each of the RAN node 230 and the RAN node 240 may be implemented as a sensing transmitter and the RAN node 210 may be implemented as a sensing receiver. The RAN node 230 transmits a sensing signal. The sensing signal is reflected by the sensing object 212. The RAN node 210 receives the reflected signal associated with the sensing signal from the RAN node 230. The RAN node 240 transmits a sensing signal. The sensing signal is reflected by the sensing object 212. The RAN node 210 receives the reflected signal associated with the sensing signal from the RAN node 240.
[0107] Fig. 3 illustrate a flowchart of a method 300 that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. In some implementations, the method 300 can be implemented at a UE, such as the UE 104 as shown in Fig. 1. For the purpose of discussion, the method 300 will be described with reference to Fig. 1.
[0108] At 310, the UE 104 receives a set of pre-defined sensing RS configurations for RAN nodes.
[0109] In some implementations, the UE 104 may receive, from the CN node 220, the set of pre-defined sensing RS configurations for RAN nodes.
[0110] At 320, the UE 104 transmits a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations.
[0111] In some implementations, the UE 104 may transmit, to a serving RAN node of the UE 104, the request for a pre-defined sensing RS configuration for the serving RAN node in the set of pre-defined sensing RS configurations. For example, the UE 104 may transmit, to the RAN node 210, the request for a pre-defined sensing RS configuration for the RAN node 210 of the UE 104.
[0112] Alternatively, in some implementations, the UE 104 may transmit, to a serving RAN node of the UE 104, the request for a pre-defined sensing RS configuration for a neighbour RAN node in the set of pre-defined sensing RS configurations. For example, the UE 104 may transmit, to the RAN node 210, the request for a pre-defined sensing RS configuration for the RAN node 240 of the UE 104.
[0113] At 330, the UE 104 receives the pre-defined sensing RS configuration. In some implementations, the UE 104 may receive, from the RAN node 210, the pre-defined sensing RS configuration for the RAN node 210 or 240.
[0114] At 340, the UE 104 applies the pre-defined sensing RS configuration for receiving sensing RS.
[0115] With the method 300, balance between radio resource efficiency and the satisfaction of sensing QoS requirements may be achieved.
[0116] Fig. 4 illustrate a flowchart of a method 400 that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. In some implementations, the method 400 can be implemented at a RAN node, such as the RAN node 210 as shown in 2A, 2B, 2C or 2D, or the RAN node 230 in Fig. 2B, or the RAN node 240 in Fig. 2C, or the RAN node 240 in Fig. 2D. For the purpose of discussion, the method 400 will be described with reference to Fig. 2A, 2B, 2C or 2D by taking the RAN node 210 for example.
[0117] At 410, the RAN node 210 transmits, to the CN node 220, information related to sensing RS configurations supported by the RAN node 210.
[0118] At 420, the RAN node 210 receives a set of pre-defined sensing RS configurations from the CN node 220.
[0119] With the method 400, balance between radio resource efficiency and the satisfaction of sensing QoS requirements may be achieved.
[0120] Fig. 5 illustrate a flowchart of a method 500 that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. In some implementations, the method 500 can be implemented at a CN node, such as the CN node 220 as shown in 2A, 2B, 2C or 2D.
[0121] At 510, the CN node 220 receives, from a RAN node, information related to sensing RS configurations supported by the RAN node.
[0122] At 520, the CN node 220 transmits a set of pre-defined sensing RS configurations to the RAN node or the UE 104.
[0123] Fig. 6 illustrates a signaling diagram illustrating an example process 600 that supports switching between sensing signal transmission patterns in accordance with aspects of the present disclosure. The process 600 may be considered as an example implementation of the method 400 or 500. The process 600 may involve the RAN node 210, the RAN node 230, the RAN node 240 and the CN node 220 in Fig. 2D. For the purpose of discussion, the process 600 and some example implementations of the process 700 will be described with reference to Fig. 2D.
[0124] As shown in Fig. 6, the RAN node 210 transmits 610, to the CN node 220, information related to sensing RS configurations supported by the RAN node 210.
[0125] In some implementations, the information related to sensing RS configurations supported by the RAN node 210 may comprise a first indication indicating whether the RAN node 210 can act as a sensing transmission node. The sensing transmission node means a node which is capable of transmitting sensing RS.
[0126] In some implementations, if the RAN node 210 can act as a sensing transmission node, the information related to sensing RS configurations supported by the RAN node 210 may further comprise at least one of the following: ‐ at least one transmission periodicity of a sensing RS supported by the RAN node 210, or ‐ at least one transmission bandwidth of the sensing RS supported by the RAN node 210.
[0127] In some implementations, the at least one transmission periodicity of the sensing RS supported by the RAN node 210 may define at least one allowed periodicity that the RAN node 210 allows to send the sensing signal as a sensing transmission node. For example, the at least one transmission periodicity may be at least one of the following in the unit of slots: 4, 5, 8, 16 or 32.
[0128] In some implementations, the at least one transmission bandwidth of the sensing RS may define the allowed bandwidth that the RAN node 210 allows to send the sensing signal as a sensing transmission node. For example, the at least one transmission bandwidth of the sensing RS may define the number of PRBs that sensing RS can be occupied. For example, the number of PRBs that sensing RS can be occupied may be 4 or 8.
[0129] In some implementations, the information related to sensing RS configurations supported by the RAN node 210 may comprise a second indication indicating whether the RAN node 210 can act as a sensing reception node.
[0130] In some implementations, if the RAN node 210 can act as a sensing reception node, the information related to sensing RS configurations supported by the RAN node 210 may further comprise at least one of the following: ‐ at least one reception periodicity of a reflected sensing RS supported by the RAN node 210, or ‐ at least one reception bandwidth of a reflected sensing RS supported by the RAN node 210.
[0131] In some implementations, the at least one reception periodicity of the reflected sensing RS supported by the RAN node 210 may define at least one allowed periodicity that the RAN node 210 allows to detect the reflected sensing RS as a sensing reception node. For example, the at least one reception periodicity may be at least one of the following in the unit of slots: 4, 5, 8, 16 or 32.
[0132] In some implementations, the at least one reception bandwidth of the reflected sensing RS may define at least one allowed bandwidth that the RAN node 210 allows to detect the reflected sensing RS as a sensing reception node. For example, the at least one reception bandwidth may define the number of PRBs that the reflected sensing RS can be occupied. For example, the number of PRBs that sensing RS can be occupied may be 4 or 8.
[0133] Similarly, the RAN node 230 transmits 612, to the CN node 220, information related to sensing RS configurations supported by the RAN node 220. The RAN node 240 transmits 614, to the CN node 220, information related to sensing RS configurations supported by the RAN node 240.
[0134] The information related to sensing RS configurations supported by the RAN nodes 230 and 240 is similar to the information related to sensing RS configurations supported by the RAN node 210. Details of the information are omitted for brevity.
[0135] In some implementations, the information related to sensing RS configurations supported by a RAN node may be per RAN node. In such implementations, an ID of the RAN node may be provided to the CN node 220.
[0136] According to the information related to sensing RS configurations supported by the RAN node 210, the CN node 220 transmits 620 a set of pre-defined sensing RS configurations to the RAN node 210. The set of pre-defined sensing RS configurations transmitted to the RAN node 210 is a set of possible sensing RS configurations which can be requested by the RAN node 210 in an on-demand way. In this regard, a pre-defined sensing RS configuration is also referred to as “an on-demand pre-defined sensing RS configuration” , and the sensing RS based on the pre-defined sensing RS configuration is also referred to as “an on-demand sensing RS” .
[0137] The on-demand sensing RS may have at least one of the following advantages.
[0138] Firstly, the on-demand sensing RS may improve efficiency and lead to overhead reduction. The sensing RS transmission to all beam sweeping directions results in an unnecessary transmission of sensing RS. Thus, a solution is required to identify a mechanism to optimize the sensing RS transmission. By selecting the optimum number of beams and beam directions for sensing RS transmission and by switching off the sensing RS transmission in a more opportunistic way, on-demand sensing RS also avoids unnecessary overhead, waste of energy, etc. in the case that no sensing task is required during a particular time or in a particular area of a network.
[0139] Secondly, the on-demand sensing RS may lead to latency reduction. On-demand sensing RS enables to minimize or eliminate additional latency associated with signaling or procedure for reconfiguration of sensing RS configuration. For example, a sensing RS configuration may be dynamically activated or deactivated with low latency with on-demand sensing RS.
[0140] Thirdly, the on-demand sensing RS may improve accuracy. On-demand sensing RS enables sensing RS configuration to be updated based on conditions at a receiving UE 104 (e.g. radio environment) and measurements made by the UE 104 or network for improving positioning accuracy.
[0141] In some implementations, a pre-defined sensing RS configuration in the set may comprise at least one of the following: ‐ an ID of the pre-defined sensing RS configuration, wherein the ID identifies the pre-defined sensing RS configuration; ‐ a transmission periodicity of a sensing RS or a sensing RS set; ‐ an offset of the sensing RS, wherein the offset is with respect to the system frame number (SFN) #0 and slot#0; or ‐ a transmission bandwidth of the sensing RS or the sensing RS set.
[0142] In some implementations, the set of pre-defined sensing RS configurations may comprise a first pre-defined sensing RS configuration for a sensing transmission node.
[0143] In some implementations, the first pre-defined sensing RS configuration for the sensing transmission node may comprise at least one of the following: ‐ an ID of the first pre-defined sensing RS configuration for the sensing transmission node, wherein the ID identifies the first pre-defined sensing RS configuration; ‐ a transmission periodicity of a sensing RS or a sensing RS set; ‐ an offset of the sensing RS, wherein the offset is with respect to the SFN#0 and slot#0; or ‐ a transmission bandwidth of the sensing RS or the sensing RS set.
[0144] Additionally or alternatively, in some implementations, the set of pre-defined sensing RS configurations may comprise a second pre-defined sensing RS configuration for a sensing reception node.
[0145] In some implementations, the second pre-defined sensing RS configuration for the sensing reception node may comprise at least one of the following: ‐ an ID of the second pre-defined sensing RS configuration for the sensing reception node, wherein the ID identifies the second pre-defined sensing RS configuration; ‐ a reception periodicity of a reflected sensing RS or a reflected sensing RS set, ‐ an offset of the reflected sensing RS, wherein the offset is with respect to the SFN#0 and slot#0; or ‐ a reception bandwidth of the reflected sensing RS or the reflected sensing RS set.
[0146] Similarly, according to the information related to sensing RS configurations supported by the RAN node 230, the CN node 220 transmits 622 a set of pre-defined sensing RS configurations to the RAN node 230. The set of pre-defined sensing RS configurations transmitted to the RAN node 230 is similar to set of pre-defined sensing RS configurations transmitted to the RAN node 210. Details of the set of pre-defined sensing RS configurations transmitted to the RAN node 230 are omitted for brevity.
[0147] Similarly, according to the information related to sensing RS configurations supported by the RAN node 240, the CN node 220 transmits 624 a set of pre-defined sensing RS configurations to the RAN node 240. The set of pre-defined sensing RS configurations transmitted to the RAN node 240 is similar to set of pre-defined sensing RS configurations transmitted to the RAN node 210. Details of the set of pre-defined sensing RS configurations transmitted to the RAN node 240 are omitted for brevity.
[0148] In some implementations, the CN node 220 may also transmit an initial sensing RS configuration to at least one of the RAN nodes 210, 230 and 240. The initial sensing RS configuration indicates the sensing RS configuration that a RAN node initially uses when receiving the set of pre-defined sensing RS configurations. The initial sensing RS configuration may also comprise a first initial sensing RS configuration for a sensing transmission node and a second initial sensing RS configuration for a sensing reception node respectively.
[0149] In some implementations, for a potential sensing reception node, the CN node 220 may transmit pre-defined sensing RS configurations of the neighbour RAN nodes. For example, if the RAN node 210 is a sensing reception node, the CN node 220 may transmit pre-defined sensing RS configurations of the RAN node 230 and the RAN node 240 to the RAN node 210. In this way, in case of sensing collaborations e.g., bi-static sensing mode, the RAN node 210 can request on-demand sensing RS configurations of the RAN node 230 and the RAN node 240.
[0150] With continued reference to Fig. 6, the RAN node 210 transmits 630, to the CN node 220, a request for a pre-defined sensing RS configuration in the set of pre-defined sensing RS configurations.
[0151] In some implementations, the request for the pre-defined sensing RS configuration may comprise at least one of the following: ‐ an ID of the RAN node 210, ‐ an ID of the requested pre-defined sensing RS configuration, ‐ start time of the sensing RS, or ‐ a duration of the sensing RS.
[0152] In some implementations, in the mono-static sensing mode, a RAN node may act as both a sensing transmission node and a sensing reception node. For instance, the RAN node 210 acts as a sensing RAN node operating in this mono-static mode. The RAN node 210 may request a pre-defined sensing RS configuration of the RAN node 210. Specifically, the RAN node 210 requests one of the pre-defined sensing RS configurations in the set by indicating the corresponding pre-defined sensing RS configuration ID in the request. In addition to the requested pre-defined sensing RS configuration ID, the RAN node 210 may further include requests for start time and a duration of the sensing RS in the same request.
[0153] In some implementations, in the bi-static sensing mode, the sensing transmission node and the sensing reception node are distinct entities. For example, the RAN node 210 may act as the sensing reception node while the RAN node 230 may act as the sensing transmission node. The RAN node 210 may request the pre-defined sensing RS configuration of the RAN node 230 by indicating the pre-defined sensing RS configuration ID, and the ID of the RAN node 230. In addition to the requested pre-defined sensing RS configuration ID, the RAN node 210 may further include requests for start time and a duration of the sensing RS of the RAN node 230 in the same request.
[0154] Based on the request, the CN node 220 transmits 640 the pre-defined sensing RS configuration to the RAN node 210.
[0155] In some implementations, the CN node 220 may determine whether to change the sensing RS transmission as requested by the RAN node 210. If the CN node 220 determines to change the sensing RS transmission, the CN node 220 may transmit an ID of the pre-defined sensing RS configuration of a sensing transmission node to the sensing transmission node. The ID of the pre-defined sensing RS configuration is used to identify the pre-defined sensing RS configuration as described in one of actions 620, 622 and 624. The CN node 220 may transmit an ID of the pre-defined sensing RS configuration of a sensing reception node to the sensing reception node. The ID of the pre-defined sensing RS configuration is used to identify the pre-defined sensing RS configuration as described in one of actions 620, 622 and 624.
[0156] The CN node 220 may also provide the start time and duration of the pre-defined sensing RS configuration.
[0157] In some implementations, in the mono-static sensing mode as described in the action 630, the RAN node 210 may act as a sensing RAN node operating in this mono-static mode. The CN node 220 may transmit, to the RAN node 210, both an ID of a first pre-defined sensing RS configuration for a sensing transmission node and an ID of a second pre-defined sensing RS configuration for a sensing reception node.
[0158] In some implementations, in the bi-static sensing mode as described in the action 630, the RAN node 210 may act as the sensing reception node while the RAN node 230 may act as the sensing transmission node. The CN node 220 may transmit 642 the ID of the first pre-defined sensing RS configuration for the sensing transmission node to the RAN node 230 and transmit 640 the ID of the second predefined sensing RS configuration for the sensing reception node to the RAN node 210.
[0159] Upon reception of the first predefined sensing RS configuration for the sensing transmission node, the RAN node 230 applies the corresponding pre-defined sensing RS configuration for transmitting the sensing RS.
[0160] Upon reception of the second predefined sensing RS configuration for the sensing reception node, the RAN node 210 applies the corresponding pre-defined sensing RS configuration for receiving the reflected sensing RS.
[0161] In some implementations, when the duration of the received pre-defined sensing RS configuration expires, the RAN node 210 may switch to or fall back to the initial sensing RS configuration or the default sensing RS configuration. In case there is no duration is configured, the RAN node 210 may transmit, to the CN node 220, a request for a new pre-defined sensing RS configuration and switch to the requested new pre-defined sensing RS configuration indicated by the CN node 220.
[0162] Fig. 7 illustrates a signaling diagram illustrating an example process 700 that supports switching between sensing signal transmission patterns in accordance with aspects of the present disclosure. The process 700 may be considered as an example implementation of the method 300. The process 700 may involve the UE 104, the RAN node 210, the RAN node 240 and the CN node 220 in Fig. 2C. For the purpose of discussion, the process 700 and some example implementations of the process 700 will be described with reference to Fig. 2C.
[0163] Generally, in the process 700, the RAN node 210 may act as a serving RAN node of the UE 104, and the RAN node 240 may act as a neighbor RAN node of the RAN node 210. The UE 104 may perform a mobility procedure from a first cell of the RAN node 210 to a second cell of the RAN node 240.
[0164] As shown in Fig. 7, the RAN node 210 transmits 710, to the CN node 220, information related to sensing RS configurations supported by the RAN node 210. The RAN node 240 transmits 712, to the CN node 220, information related to sensing RS configurations supported by the RAN node 240. The actions 710 and 712 are similar to the actions 610 and 614. Details of these actions are omitted for brevity.
[0165] According to the information related to sensing RS configurations supported by the RAN node 210, the CN node 220 transmits 720 a set of pre-defined sensing RS configurations to the RAN node 210. According to the information related to sensing RS configurations supported by the RAN node 240, the CN node 220 transmits 722 a set of pre-defined sensing RS configurations to the RAN node 240. The actions 720 and 722 are similar to the actions 620 and 624. Details of these actions are omitted for brevity.
[0166] The CN node 220 transmits 724 the set of pre-defined sensing RS configurations to the UE 104.
[0167] In some implementations, the set of pre-defined sensing RS configurations may comprise pre-defined sensing RS configurations per RAN node or per cells.
[0168] In some implementations, the set of pre-defined sensing RS configurations may comprise pre-defined sensing RS configurations for the RAN node 210 and pre-defined sensing RS configurations for the RAN node 240.
[0169] The UE 104 transmits 730, to the RAN node 210, a request for a pre-defined sensing RS configuration for the RAN node 240 in the set of pre-defined sensing RS configurations.
[0170] For example, when the UE 104 moves from a first cell of the RAN node 210 to a second cell of the RAN node 240, the UE 104 may transmit, to the RAN node 210, the request for the pre-defined sensing RS configuration for the RAN node 240 head of handover, which can improve sensing interruption due to handover.
[0171] In some implementations, the request for the pre-defined sensing RS configuration for the RAN node 240 may comprise at least one of the following: ‐ an ID of the RAN node 240, ‐ an ID of the requested pre-defined sensing RS configuration, ‐ start time of the requested pre-defined sensing RS configuration, or ‐ a duration of the requested pre-defined sensing RS configuration.
[0172] In some implementations, the UE 104 may determine whether at least one radio condition is fulfilled. If the at least one radio condition is fulfilled, the UE 104 may transmit, to the RAN node 210, the request for the pre-defined sensing RS configuration for the RAN node 240. Such implementations enable the target cell to transmit the sensing RS according to the sensing RS configuration before handover.
[0173] For example, the serving RAN node (such as the RAN node 210) can configure the at least one radio condition to trigger the UE 104 to request the pre-defined sensing RS configuration of a neighbour RAN node (such as the RAN node 240) . The at least one radio condition may include measurement events e.g. A3 or A5. If the measurement events are fulfilled, the UE 104 can request the pre-defined sensing RS configuration of the neighbour RAN node according to at least one configured radio condition. This enables the target cell to transmit the sensing RS according to the sensing RS configuration before handover.
[0174] In some implementations, after success handover to the target cell of the RAN node 240, the UE 104 can request the pre-defined sensing RS configuration of target cells when the UE 104 determines the handover is successful.
[0175] In some implementations, the UE 104 may transmit the request for the pre-defined sensing RS configuration for the RAN node 240 by RRC message or MAC CE.
[0176] The RAN node 210 forwards 732, to the RAN node 240, the request for the pre-defined sensing RS configuration for the RAN node 240.
[0177] In some implementations, when the RAN node 210 receives the request for the pre-defined sensing RS configuration for the RAN node 240, the RAN node 210 identifies the ID of the requested RAN node. The RAN node 210 forwards the request to the requested RAN node 240 via Xn interface or liked interface. The forwarded request may comprise at least one of the following: ‐ the ID of the requested pre-defined sensing RS configuration, ‐ an ID of the RAN node 240, ‐ start time of the requested pre-defined sensing RS configuration, or ‐ a duration of the requested pre-defined sensing RS configuration.
[0178] Upon receiving the request, the RAN node 240 determines whether to change the sensing RS transmission as requested by the UE 104. If the RAN node 240 determines to change the sensing RS transmission, the RAN node 240 transmits 740 the requested pre-defined sensing RS configuration to the RAN node 210.
[0179] In some implementations, the RAN node 240 may also transmit at least one of the following to the RAN node 210: ‐ an ID of the requested pre-defined sensing RS configuration, wherein the ID is used to identify the pre-defined sensing RS configuration as described in the action 724; ‐ start time of the requested pre-defined sensing RS configuration; or ‐ a duration of the requested pre-defined sensing RS configuration.
[0180] The RAN node 210 transmits 742 the requested pre-defined sensing RS configuration to the UE 104.
[0181] In some implementations, when the RAN node 210 receives the sensing RS configuration from the requested RAN node 240, the RAN node 210 transmits it to the UE 104. The requested pre-defined sensing RS configuration may comprise the ID of the predefined sensing RS configuration and the ID of the requested RAN node 240.
[0182] Upon reception of the pre-defined sensing RS configuration, the UE 104 applies 750 the pre-defined sensing RS configuration for receiving sensing RS.
[0183] Fig. 8 illustrates an example of a device 800 that supports transmission and reception of sensing RS in accordance with aspects of the present disclosure. The device 800 may be an example of a network entity 102 or a UE 104 as described herein. The device 800 may support wireless communication with one or more network entities 102, UEs 104, or any combination thereof. The device 800 may include components for bi-directional communications including components for transmitting and receiving communications, such as a processor 802, a memory 804, a transceiver 806, and, optionally, an I / O controller 808. 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) .
[0184] The processor 802, the memory 804, the transceiver 806, or various combinations thereof or various components thereof may be examples of means for performing various aspects of the present disclosure as described herein. For example, the processor 802, the memory 804, the transceiver 806, or various combinations or components thereof may support a method for performing one or more of the operations described herein.
[0185] In some implementations, the processor 802, the memory 804, the transceiver 806, or various combinations or components thereof may be implemented in hardware (e.g., in communications management circuitry) . The hardware may include a processor, a digital signal processor (DSP) , an application-specific integrated circuit (ASIC) , a field-programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic, discrete hardware components, or any combination thereof configured as or otherwise supporting a means for performing the functions described in the present disclosure. In some implementations, the processor 802 and the memory 804 coupled with the processor 802 may be configured to perform one or more of the functions described herein (e.g., executing, by the processor 802, instructions stored in the memory 804) .
[0186] For example, the processor 802 may support wireless communication at the device 800 in accordance with examples as disclosed herein. The processor 802 may be configured to operable to support a means for performing the following: receiving a set of pre-defined sensing RS configurations for RAN nodes; transmitting a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations; receiving the pre-defined sensing RS configuration; and applying the pre-defined sensing RS configuration for receiving sensing RS.
[0187] Alternatively, the processor 802 may be configured to operable to support a means for performing the following: transmitting, to a CN node, information related to sensing RS configurations supported by the RAN node; and receiving a set of pre-defined sensing RS configurations from the CN node.
[0188] Alternatively, the processor 802 may be configured to operable to support a means for performing the following: receiving, from a RAN node, information related to sensing RS configurations supported by the RAN node; and transmitting a set of pre-defined sensing RS configurations to the RAN node.
[0189] Fig. 9 illustrates an example of a processer 900 that supports transmission and reception of sensing RS in accordance with other aspects of the present disclosure. The processor 900 may be an example of a processor configured to perform various operations in accordance with examples as described herein. The processor 900 may include a controller 902 configured to perform various operations in accordance with examples as described herein. The processor 900 may optionally include at least one memory 904. Additionally, or alternatively, the processor 900 may optionally include one or more arithmetic-logic units (ALUs) 906. 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) .
[0190] The processor 900 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 900) 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) .
[0191] The controller 902 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 900 to cause the processor 900 to support various operations in accordance with examples as described herein. For example, the controller 902 may operate as a control unit of the processor 900, generating control signals that manage the operation of various components of the processor 900. These control signals include enabling or disabling functional units, selecting data paths, initiating memory access, and coordinating timing of operations.
[0192] The controller 902 may be configured to fetch (e.g., obtain, retrieve, receive) instructions from the memory 904 and determine subsequent instruction (s) to be executed to cause the processor 900 to support various operations in accordance with examples as described herein. The controller 902 may be configured to track memory address of instructions associated with the memory 904. The controller 902 may be configured to decode instructions to determine the operation to be performed and the operands involved. For example, the controller 902 may be configured to interpret the instruction and determine control signals to be output to other components of the processor 900 to cause the processor 900 to support various operations in accordance with examples as described herein. Additionally, or alternatively, the controller 902 may be configured to manage flow of data within the processor 900. The controller 902 may be configured to control transfer of data between registers, arithmetic logic units (ALUs) , and other functional units of the processor 900.
[0193] The memory 904 may include one or more caches (e.g., memory local to or included in the processor 900 or other memory, such RAM, ROM, DRAM, SDRAM, SRAM, MRAM, flash memory, etc. In some implementation, the memory 904 may reside within or on a processor chipset (e.g., local to the processor 900) . In some other implementations, the memory 904 may reside external to the processor chipset (e.g., remote to the processor 900) .
[0194] The memory 904 may store computer-readable, computer-executable code including instructions that, when executed by the processor 900, cause the processor 900 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 902 and / or the processor 900 may be configured to execute computer-readable instructions stored in the memory 904 to cause the processor 900 to perform various functions (e.g., functions or tasks supporting transmit power prioritization) . For example, the processor 900 and / or the controller 902 may be coupled with or to the memory 904, the processor 900, the controller 902, and the memory 904 may be configured to perform various functions described herein. In some examples, the processor 900 may include multiple processors and the memory 904 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.
[0195] The one or more ALUs 906 may be configured to support various operations in accordance with examples as described herein. In some implementation, the one or more ALUs 906 may reside within or on a processor chipset (e.g., the processor 900) . In some other implementations, the one or more ALUs 906 may reside external to the processor chipset (e.g., the processor 900) . One or more ALUs 906 may perform one or more computations such as addition, subtraction, multiplication, and division on data. For example, one or more ALUs 906 may receive input operands and an operation code, which determines an operation to be executed. One or more ALUs 906 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 906 may support logical operations such as AND, OR, exclusive-OR (XOR) , not-OR (NOR) , and not-AND (NAND) , enabling the one or more ALUs 906 to handle conditional operations, comparisons, and bitwise operations.
[0196] The processor 900 may be configured to operable to support a means for performing the following: receiving a set of pre-defined sensing RS configurations for RAN nodes; transmitting a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations; receiving the pre-defined sensing RS configuration; and applying the pre-defined sensing RS configuration for receiving sensing RS.
[0197] Alternatively, the processor 900 may be configured to operable to support a means for performing the following: transmitting, to a CN node, information related to sensing RS configurations supported by the RAN node; and receiving a set of pre-defined sensing RS configurations from the CN node.
[0198] Alternatively, the processor 900 may be configured to operable to support a means for performing the following: receiving, from a RAN node, information related to sensing RS configurations supported by the RAN node; and transmitting a set of pre-defined sensing RS configurations to the RAN node.
[0199] It shall be noted that implementations of the present disclosure which have been described with reference to Figs. 1 to 7 are also applicable to the device 800 and the processor 900.
[0200] It should be noted that the methods described herein describes possible implementations, and that the operations and the steps may be rearranged or otherwise modified and that other implementations are possible. Further, aspects from two or more of the methods may be combined.
[0201] The various illustrative blocks and components described in connection with the disclosure herein may be implemented or performed with a general-purpose processor, a DSP, an ASIC, a CPU, an FPGA or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof designed to perform the functions described herein. A general-purpose processor may be a microprocessor, but in the alternative, the processor may be any processor, controller, microcontroller, or state machine. A processor may also be implemented as a combination of computing devices (e.g., a combination of a DSP and a microprocessor, multiple microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
[0202] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope of the disclosure and appended claims. For example, due to the nature of software, functions described herein may be implemented using software executed by a processor, hardware, firmware, hardwiring, or combinations of any of these. Features implementing functions may also be physically located at various positions, including being distributed such that portions of functions are implemented at different physical locations.
[0203] 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. By way of example, non-transitory computer-readable media may include RAM, ROM, electrically erasable programmable ROM (EEPROM) , flash memory, compact disk (CD) ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other non-transitory medium that may be used to carry or store desired program code means in the form of instructions or data structures and that may be accessed by a general-purpose or special-purpose computer, or a general-purpose or special-purpose processor.
[0204] As used herein, including in the claims, 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.
[0205] 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) , comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, via the transceiver from a core network (CN) node, a set of pre-defined sensing reference signal (RS) configurations for radio access network (RAN) nodes;transmit, via the transceiver, a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations;receive the pre-defined sensing RS configuration via the transceiver; andapply the pre-defined sensing RS configuration for receiving sensing RS.2.The UE of claim 1, wherein the pre-defined sensing RS configuration is one of the following:the pre-defined sensing RS configuration for a serving RAN node for the UE, andthe pre-defined sensing RS configuration for a neighbor RAN node of the serving RAN node.3.The UE of claim 1, wherein the pre-defined sensing RS configuration comprises at least one of the following:an identity (ID) of the pre-defined sensing RS configuration,an ID of the RAN node,start time of the pre-defined sensing RS configuration, ora duration of the pre-defined sensing RS configuration.4.The UE of claim 1, wherein the processor is configured to transmit the request for the pre-defined sensing RS configuration by:determining whether a radio condition is fulfilled; andbased on determining that the radio condition is fulfilled, transmit, via the transceiver to a serving RAN node of the UE, the request for the pre-defined sensing RS configuration for a neighbor RAN node of the serving RAN node.5.The UE of claim 1, wherein the request comprises at least one of the following:an identity (ID) of the RAN node,an ID of the pre-defined sensing RS configuration,start time of the pre-defined sensing RS configuration, ora duration of the pre-defined sensing RS configuration.6.A radio access network (RAN) node, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:transmit, via the transceiver to a core network (CN) node, information related to sensing reference signal (RS) configurations supported by the RAN node; andreceive a set of pre-defined sensing RS configurations via the transceiver from the CN node.7.The RAN node of claim 6, wherein the information related to sensing RS configurations supported by the RAN node comprises at least one of the following:a first indication indicating whether the RAN node can act as a sensing transmission node,at least one transmission periodicity of a sensing RS supported by the RAN node,at least one transmission bandwidth of the sensing RS supported by the RAN node,a second indication indicating whether the RAN node can act as a sensing reception node,at least one reception periodicity of a reflected sensing RS supported by the RAN node, orat least one reception bandwidth of a reflected sensing RS supported by the RAN node.8.The RAN node of claim 6, wherein the set of pre-defined sensing RS configurations comprises a first pre-defined sensing RS configuration for a sensing transmission node.9.The RAN node of claim 8, wherein the first pre-defined sensing RS configuration for the sensing transmission node comprises at least one of the following:an identity (ID) of the first pre-defined sensing RS configuration for the sensing transmission node,a transmission periodicity of a sensing RS or a sensing RS set,an offset of the sensing RS, ora transmission bandwidth of the sensing RS or the sensing RS set.10.The RAN node of claim 6, wherein the set of pre-defined sensing RS configurations comprises a second pre-defined sensing RS configuration for a sensing reception node.11.The RAN node of claim 10, wherein the second pre-defined sensing RS configuration for the sensing reception node comprises at least one of the following:an identity (ID) of the second pre-defined sensing RS configuration for the sensing reception node,a reception periodicity of a reflected sensing RS or a reflected sensing RS set, an offset of the reflected sensing RS, ora reception bandwidth of the reflected sensing RS or the reflected sensing RS set.12.The RAN node of claim 6, wherein the RAN node acts as a sensing reception node; andwherein the set of pre-defined sensing RS configurations comprises a third pre-defined sensing RS configuration for a neighbor RAN node acting as a sensing transmission node.13.The RAN node of claim 6, wherein the processor is further configured to:transmit, via the transceiver to the CN node, a request for a pre-defined sensing RS configuration in the set of pre-defined sensing RS configurations;receive the pre-defined sensing RS configuration via the transceiver from the CN node; andapply the pre-defined sensing RS configuration for transmitting or receiving sensing RS.14.The RAN node of claim 13, wherein the request comprises at least one of the following:an identity (ID) of the RAN node,an ID of the pre-defined sensing RS configuration,start time of the sensing RS, ora duration of the sensing RS.15.The RAN node of claim 6, wherein the pre-defined sensing RS configuration comprises at least one of the following:an identity (ID) of the pre-defined sensing RS configuration for the second RAN node,start time of the pre-defined sensing RS configuration, ora duration of the pre-defined sensing RS configuration.16.The RAN node of claim 6, wherein the processor is further configured to:receive an initial sensing RS configuration via the transceiver from the CN node; andbased on determining that a duration of the pre-defined sensing RS configuration expires, switch to the initial sensing RS configuration.17.A core network (CN) node, comprising:a processor; anda transceiver coupled to the processor,wherein the processor is configured to:receive, via the transceiver from a radio access network (RAN) node, information related to sensing reference signal (RS) configurations supported by the RAN node; andtransmit a set of pre-defined sensing RS configurations via the transceiver to the RAN node or a user equipment (UE) .18.The CN node of claim 17, wherein the information related to sensing RS configurations supported by the RAN node comprises at least one of the following:a first indication indicating whether the RAN node can act as a sensing transmission node,at least one transmission periodicity of a sensing RS supported by the RAN node,at least one transmission bandwidth of the sensing RS supported by the RAN node,a second indication indicating whether the RAN node can act as a sensing reception node,at least one reception periodicity of a reflected sensing RS supported by the RAN node, orat least one reception bandwidth of a reflected sensing RS supported by the RAN node.19.The CN node of claim 17, wherein the set of pre-defined sensing RS configurations comprises a first pre-defined sensing RS configuration for a sensing transmission node.20.A processor for wireless communication, comprising:at least one memory; anda controller coupled with the at least one memory and configured to cause the controller to:receive, via a transceiver, a set of pre-defined sensing reference signal (RS) configurations for radio access network (RAN) nodes;transmit, via the transceiver, a request for a pre-defined sensing RS configuration for a RAN node in the set of pre-defined sensing RS configurations;receive the pre-defined sensing RS configuration via the transceiver; andapply the pre-defined sensing RS configuration for receiving sensing RS.