Method and equipment for supporting space element self-adaption

Abstract

The embodiment of the invention relates to a method and equipment for supporting space element self-adaption. An exemplary device, e.g., a UE, may include a transceiver and a processor coupled to the transceiver. The processor is configured to: receive a first signaling indicating at least one RS set, where each RS set includes at least one RS resource; determining at least one RS group based on the at least one RS set; and performing reporting based on at least one of the at least one RS group or the at least one RS set.

Description

Technical Field

[0001] Embodiments of the present application generally relate to wireless communication technology, and more particularly, to a method and apparatus for supporting spatial element adaptation. Background Art

[0002] Wireless communication systems are widely deployed to provide various telecommunication services, such as telephony, video, data, messaging, broadcast, etc. Wireless communication systems may employ multiple access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., time, frequency, and power). Examples of wireless communication systems may include fourth generation (4G) systems, such as long term evolution (LTE) systems, LTE-Advanced (LTE-A) systems, or LTE-A Pro systems, and fifth generation (5G) systems, which may also be referred to as new radio (NR) systems. However, wireless communication systems still need to evolve in pursuit of better quality of service, better service experience, and lower cost.

[0003] According to the RAN1#111 agreement, it is necessary to further study the adaptive technologies and enhancements of spatial elements, including but not limited to the following aspects: enhancements to (CSI) reference signal (RS) (re)configuration, CSI / radio resource management (RRM) / radio link monitoring (RLM) measurements, CSI reporting (e.g., multiple CSI reports), and beam management for gNB to switch between different spatial domain configurations. Summary of the invention

[0004] At least one object of the present application is to provide a technical solution to support spatial element adaptation, which involves determining the RS (or RS resources) used for measurement (e.g., CSI-RS measurement and / or synchronization signal block (SSB) measurement), and then switching among different spatial domain configurations based on the RS measurement report.

[0005] Some embodiments of the present application provide an exemplary remote device (e.g., UE), comprising: a transceiver; and a processor coupled to the transceiver. The processor is configured to: receive first signaling indicating at least one RS set, wherein each RS set includes at least one RS resource; determine at least one RS group based on the at least one RS set; and perform reporting based on at least one of the following: the at least one RS group or the at least one RS set.

[0006] Some other embodiments of the present application provide an exemplary wireless communication method, for example, a method performed in a UE, comprising: receiving a first signaling indicating at least one RS set, wherein each RS set includes at least one RS resource; determining at least one RS group based on the at least one RS set; and performing reporting based on at least one of: the at least one RS group or the at least one RS set.

[0007] Still other embodiments of the present application provide a radio access network (RAN) node, e.g., a gNB, comprising: a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: transmit a first signaling indicating at least one RS set, wherein each RS set comprises at least one RS resource; determine at least one RS group based on the at least one RS set; and receive a report based on the at least one RS group or at least one of the at least one RS set.

[0008] In some embodiments of the present application, the at least one RS group is respectively the at least one RS set.

[0009] In some embodiments of the present application, the processor is configured to: receive a second signaling indicating the following information: at least one of the following: a window size of an RS set or at least one time instance of an RS set; or a window size of an RS set and an offset of an RS set; or a window size of an RS set, an offset of an RS set and at least one time instance of an RS set; or one or more RS resource indexes within an RS set in the at least one RS set; or an RS set number within an RS group; or the number of time instances of an RS set within an RS group; or an RS resource number within an RS group; or the number of RS groups; or the number of elements in each RS group; or at least one port index within each RS resource; and determine the at least one RS group based on the at least one RS set and the information indicated in the second signaling.

[0010] According to some embodiments of the present application, when the at least one RS resource in the RS set is a periodic RS resource, the window size and the offset are in units of the periodicity of the at least one RS resource.

[0011] According to some embodiments of the present application, when the second signaling indicates the window size, the at least one time instance of the RS set will be determined based on the window size.

[0012] According to some embodiments of the present application, when the second signaling indicates the window size and the offset, the at least one time instance of the RS set will be determined based on the window size and the offset.

[0013] According to some embodiments of the present application, each RS element in the RS group in the at least one RS group is an RS resource pair. In some scenarios, each RS resource pair in the RS group is configured. In some scenarios, the two RS resources in the RS resource pair are from the same RS set or different RS sets.

[0014] In some embodiments of the present application, the start time for determining the at least one RS group is configured by a medium access control (MAC) control element (CE), a group common downlink control information (DCI), or a dynamic scheduling DCI.

[0015] In some embodiments of the present application, the stop time for determining the at least one RS group is configured by MAC CE, group common DCI or dynamic scheduling DCI, or is based on a configured or predefined timer.

[0016] According to some embodiments of the present application, the start of the timer is based on determining a time instance when the at least one RS group starts.

[0017] In some embodiments of the present application, the report based on at least one of the at least one RS group or the at least one RS set includes reporting at least one of the following: differential reporting metrics regarding different RS sets; differential reporting metrics regarding different RS groups; or differential reporting metrics regarding both different RS sets and different RS groups.

[0018] According to some embodiments of the present application, the differential reporting metric includes at least one of the following: differential reference signal received power (RSRP), differential reference signal received quality (RSRQ), differential received signal strength indicator (RSSI), differential layer 1-signal to interference and noise ratio (L1-SINR), differential rank indicator (RI) or differential channel quality indicator (CQI).

[0019] According to some embodiments of the present application, the report based on at least one of the at least one RS group or the at least one RS set further includes reporting at least one of the RS set index or the RS group index. In some scenarios, the number of the at least one of the RS set index or the RS group index is configured.

[0020] According to some embodiments of the present application, the different RS sets include a configured or predefined reference RS set, and the different RS groups include a configured or predefined reference group.

[0021] According to some embodiments of the present application, at least one of the following is configured: an RS set index or an RS group index associated with determining the differential reporting metric.

[0022] According to some embodiments of the present application, the differential reporting metric is based on periodic RS resources and aperiodic RS resources in an RS set or RS group, and the RS set or RS group is determined based on the periodic RS resource that is closest to and earlier than the aperiodic RS.

[0023] According to some embodiments of the present application, at least one of the following is based on a report identification: an RS set index or a group index associated with determining the differential reporting metric.

[0024] In some embodiments of the present application, the time instance for performing the reporting is configured, or based on the time instance of the non-periodic RS, or based on the event associated with the differential reporting metric.

[0025] In view of the above, the embodiments of the present application provide technical solutions to support spatial element adaptation, such as CSI and / or SSB measurements and corresponding reports, etc., to adaptively adjust the spatial elements, which can save signaling overhead and thus will facilitate the deployment and implementation of NR. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To describe the manner in which the advantages and features of the present disclosure can be obtained, the description of the present disclosure is presented by reference to specific embodiments of the present disclosure illustrated in the accompanying drawings. These drawings depict only exemplary embodiments of the present disclosure and are therefore not to be considered limiting of its scope.

[0027] Figure 1 is a schematic diagram illustrating an exemplary wireless communication system according to some embodiments of the present application.

[0028] Figure 2 is a flowchart illustrating an exemplary process of a method for supporting spatial element adaptation according to some embodiments of the present application.

[0029] Figure 3 is a schematic diagram illustrating determination of an RS group in scenario 2 according to some embodiments of the present application.

[0030] Figure 4 is a schematic diagram illustrating determination of an RS group in scenario 3 according to some embodiments of the present application.

[0031] Figure 5 is a schematic diagram illustrating determination of an RS group in scenario 3 according to some other embodiments of the present application.

[0032] Figure 6 A block diagram illustrating an exemplary apparatus supporting spatial element adaptation according to some embodiments of the present application.

[0033] Figure 7 A block diagram illustrating an exemplary apparatus supporting spatial element adaptation according to some other embodiments of the present application. DETAILED DESCRIPTION

[0034] The detailed description of the accompanying drawings is intended as a description of the preferred embodiments of the present application, and is not intended to represent the only form in which the present application can be practiced. It should be understood that the same or equivalent functions can be implemented by different embodiments intended to be included in the spirit and scope of the present application.

[0035] Reference will now be made in detail to some embodiments of the present application, examples of which are illustrated in the accompanying drawings. For ease of understanding, embodiments are provided under specific network architectures and new service scenarios (e.g., 3rd Generation Partnership Project (3GPP) 5G, 3GPP LTE, etc.). It is considered that, with the development of network architectures and new service scenarios, all embodiments in the present application are also applicable to similar technical problems; and in addition, the terms stated in the present application may be changed, which should not affect the principles of the present application.

[0036] Figure 1 A schematic diagram illustrating an exemplary wireless communication system 100 in accordance with some embodiments of the present application.

[0037] like Figure 1 As shown in FIG. 1 , a wireless communication system 100 includes a UE 103 and a base station (BS) 101. Although for simplicity, Figure 1 Only one BS is illustrated in FIG. 1 , but it is considered that in some other embodiments of the present application, the wireless communication system 100 may include more BSs. Similarly, although for simplicity, in Figure 1 Only one UE is illustrated in the figure, but it is considered that in some other embodiments of the present application, the wireless communication system 100 may include more UEs.

[0038] The wireless communication system 100 is compatible with any type of network capable of sending and receiving wireless communication signals. For example, the wireless communication system 100 is compatible with wireless communication networks, cellular telephone networks, networks based on time division multiple access (TDMA), networks based on code division multiple access (CDMA), networks based on orthogonal frequency division multiple access (OFDMA), LTE networks, networks based on 3GPP, 3GPP 5G networks, satellite communication networks, high altitude platform networks, and / or other communication networks.

[0039] BS 101 may also be referred to as an access point, an access terminal, a base, a macro cell, a Node B, an enhanced Node B (eNB), a gNB, a home Node B, a relay node or a device, or described using other terms used in the art. BS 101 is typically part of a radio access network, which may include a controller communicatively coupled to BS 101.

[0040] In addition, BS101 may be configured with one transmit-receive point (TRP) (or panel), i.e., operating in a single TRP scenario, or configured with multiple TRPs (or panels), i.e., operating in a multi-TRP scenario. That is, one or more TRPs are associated with BS101. The TRP may act as a small BS. Two TRPs may have the same cell ID (identifier or index) or different cell IDs. The two TRPs may communicate with each other via a backhaul link. Such a backhaul link may be an ideal backhaul link or a non-ideal backhaul link. The latency of an ideal backhaul link may be considered to be zero, and the latency of a non-ideal backhaul link may be tens of milliseconds, and is much larger than the latency of an ideal backhaul link, for example, on the order of tens of milliseconds.

[0041] A single TRP may be used to serve one or more UEs 103 under the control of BS 101. In different scenarios, TRP may be referred to by different terms, which may be represented by a TCI state index or a CORESETPoolIndex value, etc. It should be understood that the TRP (or panel) configured for BS 101 may be transparent to UE 103.

[0042] UE 103 may include a computing device, such as a desktop computer, a laptop computer, a personal digital assistant (PDA), a tablet computer, a smart TV (e.g., a TV connected to the Internet), a set-top box, a game console, a security system (including a security camera), a car computer, a network device (e.g., a router, a switch, and a modem), etc. According to an embodiment of the present application, UE 103 may include a portable wireless communication device, a smart phone, a cellular phone, a flip phone, a device with a subscriber identity module, a personal computer, a selective call receiver, or any other device capable of sending and receiving communication signals on a wireless network. In some embodiments of the present application, UE 103 may include a wearable device, such as a smart watch, a fitness bracelet, an optical head-mounted display, etc. In addition, UE 103 may be referred to as a subscriber unit, a mobile device, a mobile station, a user, a terminal, a mobile terminal, a wireless terminal, a fixed terminal, a subscriber station, a user terminal or a device, or described using other terms used in the art.

[0043] For example, regarding the spatial elements in a wireless communication system, they generally include antenna elements, transmit (Tx) radio units (RUs) (with subarrays / full connections), antenna panels, transmit receive points (TRxPs) (co-located or geographically separated from each other) and logical antenna ports (corresponding to specific signals and channels, also called logical ports or antenna ports), etc. According to the RAN1#111 protocol, it is necessary to further study the adaptive technology and enhancement of spatial elements, which include but are not limited to the following aspects:

[0044] Mechanism to indicate spatial element adaptation to the user equipment (UE)

[0045] Signaling update of active channel state information (CSI) reference signal (RS) configuration

[0046] Enhancements to CSI-RS (re)configuration, CSI / Radio Resource Management (RRM) / Radio Link Monitoring (RLM), CSI reporting (e.g., multiple CSI reports), and beam management for gNBs to switch between different spatial domain configurations

[0047] If required, associated UE behavior in case of spatial element adaptation, e.g., measurement, CSI feedback, power control, physical uplink shared channel (PUSCH) / physical downlink shared channel (PDSCH) repetition, sounding reference signal (SRS) transmission, transmit configuration indication (TCI) configuration, beam management, beam failure recovery, radio link monitoring, cell (re)selection, handover, initial access, etc.

[0048] Therefore, for the gNB decision on spatial domain adaptation, multiple CSI reports corresponding to different active antenna ports or active TXRUs are required. Therefore, how to determine the CSI measurement resources for multiple CSI reports and how to determine the corresponding multiple CSI reports should be considered and solved. For example, a more specific problem that needs to be solved is how to reduce the signaling overhead corresponding to RS configuration and reporting.

[0049] Taking into account at least the above research projects, embodiments of the present application propose a technical solution for supporting spatial element adaptation, for example, a method and apparatus for supporting spatial element adaptation, which mainly focuses on determining measurement resources and reports to save signaling overhead, including, for example, reducing the overhead of both measurement resources and reports in the case of multiple CSI reports. The CSI report may be based on CSI-RS and / or SSB. Exemplary spatial domain adaptation may be adaptation for antenna port switching on and off, or TXRU switching on and off, or TRP switching on and off, etc.

[0050] Figure 2 1 is a flowchart illustrating an exemplary process of a method for supporting spatial element adaptation according to some embodiments of the present application. Although the method is described at the system level between a RAN node (e.g., a gNB in ​​the network side) and a remote device (e.g., a UE in the remote side), a person skilled in the art should understand that the method implemented in the RAN node and the remote device can be implemented separately and / or incorporated by other devices with similar functions.

[0051] refer to Figure 2In step 201, a RAN node (e.g., a gNB) may transmit a first signaling (e.g., radio resource control (RRC) signaling or MAC CE signaling) indicating at least one RS set (each RS or RS resource may be represented by an index, etc.) to a remote side (e.g., to a UE). For example, the first signaling may indicate multiple CSI-RS or SSB sets, or indicate only one CSI-RS or SSB set. Each RS set includes at least one RS resource, such as a CSI-RS resource or SSB, etc., which may be periodic, semi-persistent, or aperiodic. In another example, the indicated RS set may include only one RS resource. The number of RS resources in different RS sets may be the same or different. In some embodiments of the present application, each RS set corresponds to a pattern of a spatial domain element (e.g., a spatial domain filter (or beam)). In other embodiments, each RS set may correspond to spatial domain adaptation, such as antenna port on or off, TRP on or off, or TXRU on or off. Therefore, in step 202, the UE will receive the first signaling.

[0052] At least one RS group based on at least one RS set may be determined for measurement in various ways. For example, in step 203, the gNB will determine at least one RS group based on at least one RS set in various ways; and correspondingly, in step 204, the UE will determine at least one RS group based on at least one RS set in various ways. The elements within each RS group may be RS resources, or RS resource pairs, or RS sets, or port indexes, etc. The two RS resources in each RS resource pair are from the same RS set or different RS sets. Therefore, each RS group may include one or more separate RS resources, or one or more separate RS resource pairs, or one or more RS sets, or one or more port indexes, etc.

[0053] The start time and stop time determined based on the measurement resources of at least one RS set, for example, the time to start determining at least one RS group and the time to stop determining at least one RS group can be determined in various ways. According to some embodiments of the present application, the start time for determining at least one RS group is configured by the network side, for example, via MAC CE, group common DCI, or dynamic scheduling DCI. Similarly, the stop time for determining at least one RS group can also be configured by the network side, for example, via MAC CE, group common DCI, or dynamic scheduling DCI. There may be a configured or predefined delay between receiving signaling and applying signaling. However, in some other embodiments of the present application, the stop time for determining at least one RS group may be based on a configured or predefined timer. The start of the timer is based on an example of the time when the determination of at least one RS group starts, for example, based on a time slot at which the determination of at least one RS group starts or based on other methods.

[0054] In step 206, the UE will perform reporting based on at least one of the at least one RS group or at least one RS set, for example, based only on at least one RS group, based only on at least one RS set, or based on both at least one RS group and at least one RS set, etc. The report may be used for beam management or for CSI reporting, etc. Therefore, in step 207, the gNB will receive a report based on at least one RS group or at least one RS set. For example, the UE may report a plurality of CSI reports to the gNB, the CSI reports being based on a plurality of CSI-RS groups determined from a plurality of CSI-RS sets.

[0055] A report based on at least one RS group or at least one RS set may be based on a differential reporting metric. In some scenarios, the report may further include reporting at least one of an RS set index or an RS group index. The number of at least one of the RS set index or the RS group index is configured or predefined.

[0056] According to some embodiments of the present application, the report based on at least one RS group or at least one RS set includes reporting at least one of the following: differential reporting metrics about different RS sets (e.g., differential reporting metrics based on RS resources from different RS sets); differential reporting metrics about different RS groups (e.g., differential reporting metrics based on RS resources, RS resource pairs, RS resource sets, or RS port sets from different RS groups); or differential reporting metrics about both different RS sets and different RS groups (e.g., differential reporting metrics based on RS resources, RS resource pairs, or RS port sets from different RS groups determined from different RS sets). Exemplary differential reporting metrics include at least one of the following: differential RSRP, differential RSRQ, differential RSSI, differential L1-SINR, differential RI, or differential CQI, etc. For example, the report based on at least one of at least one RS group or at least one RS set may report differential RSRP between different CSI-RS groups, or report differential RSRP and differential RSRQ between different CSI-RS groups, etc.

[0057] The RS set and / or RS group associated with determining the differential reporting metric can be determined in various ways. For example, in some embodiments of the present application, the RS set index and / or RS group index associated with determining the differential reporting metric is configured. In some other embodiments of the present application, the RS set index and / or group index associated with determining the differential reporting metric is based on a report identifier. For example, for an RS group with periodic RS resources and an RS group with aperiodic RS resources, when they belong to the same report identifier, the corresponding differential reporting metric between the two RS groups will be reported. For comparison based on periodic RS resources and aperiodic RS resources, the RS sets and / or RS groups to which the periodic resources and aperiodic RS resources respectively belong can also be determined based on the periodic RS resources that are closest to and earlier than the aperiodic RS.

[0058] Each differential reporting metric associated with an RS set may be generated based on a comparison between the RS set and another corresponding RS set (also referred to as a reference RS set). Similarly, each differential reporting metric associated with an RS group may be generated based on a comparison between the RS group and another corresponding RS group (also referred to as a reference RS group) (e.g., a configured or predefined reference RS group). For example, the different RS sets to be compared may include a configured or predefined reference RS set for comparison to determine the differential reporting metric. Similarly, the different RS groups to be compared may include a configured or predefined reference group for comparison to determine the differential reporting metric.

[0059] The report based on at least one RS group and / or at least one RS set may further include reporting at least one of the RS set index or the RS group index, for example, the index of the RS set with the maximum reporting metric and / or the index of the RS group with the maximum reporting metric. According to some embodiments of the present application, the number of at least one of the RS sets (e.g., RS set index) or RS groups (e.g., RS group index) is configured. For example, in the case where there are 4 CSI-RS groups determined based on multiple CSI-RS sets, and the gNB configures the number of RS groups to be reported for each report to be 2, then the UE will only report two differential reporting metrics associated with the two RS groups compared to two reference RS groups (e.g., the other two RS groups in the four groups), and report the indexes of the two RS groups with the maximum reporting metrics in addition to the differential reporting metrics of the two RS groups. As an example, it is assumed that there are group indexes 0, 1, 2, and 3. Group indexes 0 and 1 belong to a part of the four groups. Group indexes 2 and 3, which are two reference RS groups, belong to another part of the four groups. Group index 1 has an RSRP value greater than group index 0, and group index 2 has an RSRP value greater than group index 3. Finally, group indices 1 and 2 will be reported since they are the two groups with the largest reported metrics.

[0060] The time of the report can also be determined in various ways. According to some embodiments of the present application, the time instance of performing the report is configured by the gNB, for example. According to some other embodiments of the present application, the time instance of performing the report is based on the time instance of the non-periodic RS. For example: for periodic RS reporting, based on the triggering of the non-periodic RS report, when the non-periodic RS report has the same report identifier as the periodic RS report, the measurement result based on at least one of the periodic RS and the non-periodic RS will be reported. Take another example: for periodic RS reporting, based on the triggering of the non-periodic RS report, when both the periodic RS and the non-periodic RS belong to the same RS group, the measurement result based on at least one of the periodic RS and the non-periodic RS will be reported. According to some other embodiments of the present application, the time instance of performing the report is based on an event associated with a differential reporting metric. For example: when the difference between the measurement results based on the inactive RS group and the active RS group is greater than a configured or predefined threshold, the differential reporting metric will be reported. The active RS group may correspond to a spatial domain configuration currently adopted by a network node. The inactive RS group may correspond to a spatial domain configuration that is not currently adopted by the network and may be adopted by the network later or previously. The spatial domain configuration may correspond to an antenna port being on or off, a TXRU being on or off, or a TRP being on or off, etc.

[0061] In order to help understand the technical solution of the present application, a more detailed embodiment of the present application will be described below. It should be well known to those skilled in the art that, due to the consistency between the network side and the remote side, although some embodiments are only described as examples with respect to one side, the corresponding operations in the other side except for special operations should also be determined. In addition, the measurement resource determination and reporting described herein mainly consider the novel part of the adaptive aspect of the spatial element, and other measurement resource determination and reporting technologies applied to the spatial element adaptation can also refer to the known technology.

[0062] Measurement resource determination

[0063] As stated above, there are various schemes for determining adaptive measurement resources corresponding to spatial domain elements.

[0064] For example, according to some embodiments of the present application (scenario 1), at least one RS set indicated by the first signaling will be directly determined as at least one RS group, that is, at least one RS group is the same as at least one RS set respectively indicated by the first signaling, and at least one RS set will be used for measurement. For example, the multiple RS groups used for measurement are multiple CSI-RS sets configured via the first signaling, and different CSI-RS sets may have the same or different numbers of RS elements, for example, multiple CSI-RS resources. In the scenario of multiple TRPs, at least one RS group will be determined for each TRP, for example, based on the corresponding TRP identifier or CORESETPoolIndex value (each corresponding to a TRP).

[0065] According to some other embodiments of the present application, at least one RS group will be determined from at least one indicated RS set based on additional configuration or predefined information (or rules). In addition, RS resources (alone or in pairs) from at least one indicated RS set, or one or more RS sets from at least one indicated RS set will be determined (or divided or grouped or selected) to generate at least one RS group. Alternatively, one or more port indexes for each resource from at least one indicated RS set will be determined (or divided or grouped or selected) to generate at least one RS group. Therefore, each RS group includes one or more RS resources (which may be alone or in pairs), or one or more RS sets, or one or more port indexes. In some scenarios, there may be overlap in time slots or symbols for data (and / or channels) and RS groups. An exemplary solution to this problem is the QCL assumption, that is, the spatial domain relationship of data (and / or channels) will follow the spatial domain relationship of RS groups. In a multi-TRP scenario, at least one RS group may be determined for each TRP, for example, based on the corresponding TRP identifier or CORESETPoolIndex value, or based on a joint consideration of both a single TRP and multiple TRPs (if possible).

[0066] For example, according to some embodiments of the present application, the network side will further configure information for determining at least one RS group, and indicate the information to the remote side through a second signaling (e.g., another RRC signaling or MAC CE signaling or DCI signaling). Exemplary information includes but is not limited to the following:

[0067] a) at least one of: a window size of a set of RSs or at least one time instance of a set of RSs; or

[0068] b) the window size of the RS set and the offset of the RS set; or

[0069] c) a window size of a RS set, an offset of a RS set, and at least one time instance of a RS set; or

[0070] d) one or more RS resource indexes within an RS set in at least one RS set; or

[0071] e) RS set number within the RS group; or

[0072] f) the number of time instances of RS sets within a RS group; or

[0073] g) RS resource number within the RS group; or

[0074] h) the number of RS groups; or

[0075] i) the number of elements in each RS group; or

[0076] j) At least one port index within each RS resource.

[0077] At least one RS group will be determined based on at least one RS set and the information indicated in the second signaling. In some scenarios, a single item in the above information may be indicated to the UE for RS group determination. In some other scenarios, a combination of some of the above items may be indicated to the UE for RS group determination.

[0078] In some embodiments (scenario 2) of the present application, at least one RS group may be determined based on the indicated RS set according to different time domain positions (e.g., time instances, etc.). An exemplary scenario is that there is only one RS set configuration, for example, one CSI-RS resource set configuration, which contains periodic RS resources (or a set of RS that is considered to be repeated periodically). For example, when the SCS is 15KHz, the CSI-RS set contains CSI-RS resources #0, #1, #2, and #3, the periodicity (or period) of the CSI-RS set and each CSI-RS resource is 40ms, and the offsets of each CSI-RS resource are 0 time slots, 1 time slot, 2 time slots, and 3 time slots, respectively. Therefore, the time domain resources of CSI-RS resource #0 will be time slot #0, time slot #40, time slot #80, etc. The time domain resources of CSI-RS resource #1 will be time slot #1, time slot #41, time slot #81, etc. The time domain resources of CSI-RS resource #2 will be time slot #2, time slot #42, time slot #82, etc. The time domain resources of CSI-RS #3 will be time slot #3, time slot #43, time slot #83, etc. At least one RS group can be determined by dividing the periodic RS resources in the RS set (or repeated periodic RS set) into at least one RS group based on the RS set configuration according to different time domain positions (e.g., time instances). In some embodiments of the present application, the number of elements in each RS group can be configured in the second signaling. For example, the RS set number within the RS group or the number of time instances of the RS set within the RS group can be configured in the second signaling. In some other embodiments of the present application, the number of RS groups can be configured in the second signaling. In some other embodiments of the present application, a combination of part or all of the above information can be configured in the second signaling.

[0079] In some scenarios, different time domain positions may also be configured or determined based on the window size and offset (if any, it may be zero). The exemplary window size may be a multiple of the periodicity of the RS resources in the RS set (in some scenarios where the RS set is considered periodic, it may also be expressed as the periodicity of the RS set). The exemplary offset may also be in units of the periodicity of the RS resources in the RS resource set (in some scenarios where the RS set is considered periodic, it may also be expressed as the periodicity of the RS set). For example, in the case where the second signaling indicates the window size, at least one time instance of the RS set will be determined based on the window size. In the case where the second signaling indicates the window size and offset, at least one time instance of the RS set will be determined based on the window size and offset. In the case where at least one RS resource in the RS set is a periodic RS resource, the window size and offset are in units of the periodicity of at least one RS resource. In some embodiments of the present application, all time instances, windows, and offsets (if any, they may be zero) for grouping RS sets may be configured.

[0080] Each periodic RS set within the window (or RS resources within the period) may be associated with the same or different RS groups. Different RS groups may be associated with different spatial domain adaptations, such as different antenna ports turned on or off, different TRPs turned on or off, or different TXRUs turned on or off. In a multi-TRP scenario, the RS group may be determined based on each TRP, for example, based on a corresponding TRP identifier or CORESETPoolIndex value, etc.; or the determination of RS groups for both single TRP and multiple TRPs may be considered jointly.

[0081] Figure 3 is a schematic diagram illustrating determination of an RS group in scenario 2 according to some embodiments of the present application.

[0082] like Figure 3 As shown in FIG. 1 , there is one RS set configuration, e.g., one CSI-RS resource set configuration that configures a CSI-RS resource set, and the CSI-RS resource set repeats periodically. Assume that the window size is twice the periodicity of the CSI-RS set (or two periods), and the offset is zero. The number of RS sets within an RS group is 1. Then, two CSI-RS groups, e.g., group #0 and group #1, may be determined, each including one RS set.

[0083] On the other hand, the RS set configuration can also be expressed as an RS set with multiple periodic RS resources. Assume that the window size is twice the periodicity of the RS resources within the RS set and the offset is zero. The number of time instances of the RS set per RS ​​group is 1. Then, two CSI-RS groups can be determined, for example, group #0 and group #1, each containing 4 RS resources within the periodicity.

[0084] In some other embodiments (scenario 3) of the present application, at least one RS group may be determined based on the indicated RS set according to different RS resources, for example, according to an RS resource index, etc. An exemplary scenario is that there is only one RS set configuration, for example, one CSI-RS resource set configuration, which configures an RS set with periodic RS resources (or an RS set considered to be repeated periodically). Another exemplary scenario is that there is only one RS set configuration, for example, one CSI-RS resource set configuration, which configures an RS set with aperiodic CSI-RS resources. According to some embodiments of the present application, at least one RS group may be determined based on RS resources, for example, according to an RS resource index, etc., by dividing the periodic RS resources in an RS set (or a repeated periodic RS set) into at least one RS group based on an RS set configuration. Different RS groups may be associated with different spatial domain adaptations. The elements of each RS group may be separate RS resources (or RS resource indexes), for example, one or more CSI-RS resources; or may be RS resource pairs (or RS resource index pairs), for example, one or more CSI-RS resource pairs.

[0085] For example, in some embodiments of the present application, one or more RS resource indexes within the RS set may be configured in the second signaling, which are used for the RS group. In some other embodiments of the present application, the element number may be configured in the second signaling, for example, the RS resource number within the RS group. In some other embodiments of the present application, the number of RS groups may be configured in the second signaling. In some other embodiments of the present application, the number of RS groups and / or the number of elements in each RS group may be configured in the second signaling.

[0086] In the scenario of multiple TRPs, the determination of the RS group may be based on each TRP, for example, based on the corresponding TRP identifier or CORESETPoolIndex value, etc.; or the determination of the RS groups of both single TRP and multiple TRPs may be considered jointly. In some embodiments of the present application, in the case of joint determination of RS groups of both single TRP and multiple TRPs, each element in each RS group is an RS resource pair. Each RS resource in the RS resource pair corresponds to a TRP. The RS resource pair index of each RS group may be configured by the network side, for example, by the gNB via a second signaling.

[0087] There may be partial overlap or no overlap between elements (e.g., RS resources (e.g., RS resource indexes)) of different RS groups, i.e., different RS groups include partially identical or completely different RS resources. For both beam management and CSI measurement, the partial overlap case may be applied to scenarios where the beam width does not change and only the beam number changes, while the no overlap case may be applied to scenarios where both the beam width and the beam number change.

[0088] Figure 4 is a schematic diagram illustrating determination of RS groups in scenario 3 according to some embodiments of the present application, wherein there is no overlap between RS resources of different RS groups.

[0089] like Figure 4 As shown in , there is an RS set configuration, for example, a CSI-RS resource set configuration that configures a CSI-RS resource set, and the CSI-RS resource set is repeated periodically. On the other hand, the RS set configuration can also be expressed as an RS set with multiple periodic RS resources. Assume that two RS groups are determined, wherein the first RS group (for example, group #0) is configured with two RSs (or RS pairs in a multi-TRP scenario) including RS resources #0 and #2; and the second RS group (for example, group #1) is configured with the other two RSs (or another RS ​​pair in a multi-TRP scenario) including RS resources #1 and #3. Therefore, different RS groups contain completely different RS resources.

[0090] Figure 5is a schematic diagram illustrating determination of RS groups in scenario 3 according to some other embodiments of the present application, wherein there is partial overlap between RS resources of different RS groups.

[0091] like Figure 5 As shown in , there is one RS set configuration, for example, one CSI-RS resource set configuration that configures a CSI-RS resource set, and the CSI-RS resource set is repeated periodically. On the other hand, the RS set configuration can also be expressed as an RS set with multiple periodic RS resources. Assume that two RS groups are determined, wherein two RSs including RS resources #0 and #2 are configured for the first RS group (e.g., group #0), and three RSs including RS resources #1, #2, and #3 are configured for the second RS group (e.g., group #1). Therefore, since both include RS #2, the two RS groups partially overlap.

[0092] In some other embodiments (scenario 4) of the present application, at least one RS group may be determined based on the indicated RS set according to different port indexes within each resource. An exemplary scenario is that there is only one RS set configuration, for example, one CSI-RS resource set configuration, which configures an RS set with periodic RS resources (or an RS set deemed to be periodic) or one or more non-periodic RS resources. Another exemplary scenario is that there is only one RS set configuration, for example, one CSI-RS resource set configuration, which configures an RS set with non-periodic RS resources. In the case where the exemplary RS set configuration configures an RS set with only one RS, the RS set configuration may also be regarded as an RS configuration, for example, one CSI-RS resource configuration, which configures one CSI-RS resource.

[0093] Each RS group includes one or more port indexes within a resource (indicated as one resource or a resource within an indicated RS set). In some embodiments of the present application, at least one port index within each RS resource may be configured in the second signaling. Different RS groups may be associated with different spatial domain adaptations, for example, all TXRUs corresponding to antenna ports are set to off. The transmission of RS from the network side is based on the maximum port index. There may be partial overlap or non-overlap between the port indexes of different RS groups, that is, different RS groups contain partially identical or completely different port indexes. In a multi-TRP scenario, the determination of the RS group may be based on each TRP, for example, based on the corresponding TRP identifier or CORESETPoolIndex value, etc.

[0094] RS Report

[0095] The UE will perform reporting based on at least one of at least one RS group or at least one RS set, for example, reporting at least one of the following: differential reporting metrics about different RS sets; differential reporting metrics about different RS groups; or differential reporting metrics about both different RS sets and different RS groups. The RS group and / or RS set (reference RS set or reference RS group) used as a reference in each comparison can be configured or implicitly determined in various ways, for example, by the configured RS set index and / or group index or the number of RS set indexes and / or group indexes, etc. The RS group and / or RS set (reported RS set or reported RS group) used to report its differential reporting metric in each comparison can also be configured or implicitly determined in various ways, for example, by the configured RS set index and / or group index or the number of RS set indexes and / or group indexes. In some embodiments of the present application, all RS sets and / or determined RS groups may be used for comparison (as reference RS sets and / or reference RS groups, or as reported RS sets and / or reported RS groups), while in some other embodiments of the present application, only part of the RS sets and / or determined RS groups may be used for comparison.

[0096] Specifically, in some scenarios, the comparison is performed among periodic resources. Considering scenario 1 in the measurement resource determination, at least one RS set index (or group index) may be configured as a reference RS set or as an RS set to report its differential reporting metric. For scenarios 2 to 4 in the measurement resource determination, part or all of the RS groups may be used for comparison. For example, at least one RS group index for comparison (or for reporting) or the number of RS groups for comparison (or for reporting) may be configured by the network side. For example, there are 4 RS groups determined in the scenario, for example, group #0, group #1, group #2, and group #3, and the number of reports is configured to be 2. Then, the comparison will be performed between every two RS groups according to additional configuration information (or rules) or predefined information (or rules) to generate two reports, for example, between group #0 and group #1, and between subset #2 and subset #3. Which one of group #0 and group #1 and which one of group #2 and group #3 serves as a reference RS group or a reporting RS group may be determined based on configured information (or rules) or predefined information (or rules).

[0097] In some other scenarios, the comparison is performed between a periodic RS in an RS set or RS group and an aperiodic RS in an RS set or RS group. According to some embodiments of the present application, the comparison may be based on the measurement results of the aperiodic RS and the most recent periodic RS, wherein the periodic RS precedes the aperiodic RS. According to some other embodiments of the present application, the periodic RS and the aperiodic RS may be associated with the same reporting identifier, and then the comparison result, such as the differential reporting metric between the periodic RS and the aperiodic RS, may be reported.

[0098] In the case of RS reporting for beam management, at least one of the following will be reported: differential RSRP, differential RSRQ, differential RSSI, or differential L1-SINR between different RS groups. In some embodiments of the present application, the RS group index associated with the report will also be reported to the network side. How many RS groups (which may or may not have corresponding reporting metrics, such as RSRP, RSRQ, RSSI, and / or L1-SINR, etc.) will be reported can be configured by the network side. An exemplary reporting metric for an RS group (e.g., RSRP, RSRQ, RSSI, and / or L1-SINR) can be determined based on the best value among all resources of the RS group or based on the average of the best N values ​​of the reporting metric among all resources of the RS group, where N is a configuration or predefined integer greater than or equal to 1. The differential reporting metric between different RS sets is similar.

[0099] In the scenario of multiple TRPs for beam management, reporting can be performed per TRP or among different TRPs.

[0100] In case the reporting is per TRP, considering scenarios 2 to 4 in the measurement determination, each TRP may be associated with an RS set, and RS group reporting may be performed separately for each RS set.

[0101] In the case where reporting is performed among multiple TRPs, considering scenarios 2 to 4 in the measurement determination, when each TRP is associated with an RS set, in addition to the report metric, the report will also include a set index, for example, a differential report metric (or RS group index) for the RS group. The differential report metric is between different RS groups in different RS sets. In some embodiments of the present application, the RS set index and the RS group index are reported as a pair. The corresponding differential report metric may also be reported together with the RS set index and the RS group index. In some other embodiments of the present application, the RS set index and the RS group index may correspond to different bit fields. For example, the set index is reported in the first field, and the RS group index associated with the set index is reported in the second field. The corresponding report metric may also be reported together with the RS group index.

[0102] In the case of RS reporting for CSI reporting, at least one of the following will be reported: the differential value of RI between different RS groups, precoding matrix indicator (PMI), channel quality indication (CQI), layer indication (LI). If one RS group has one CQI and the other RS ​​group used for comparison has two CQIs, only the first corresponding CQI will be used to determine the differential value. Regarding PMI, RI, LI, etc., they will be reported based on each RS group. In some embodiments of the present application, the RS group index associated with the report will also be reported to the network side. How many RS groups will be reported (which may or may not have corresponding reporting metrics, such as RI, PMI, CQI and / or LI, etc.) can be configured or predefined by the network side. The exemplary reporting metrics of the RS group (e.g., RI and / or CQI, etc.) can be determined based on the best value of RI and / or CQI among all resources of the RS group, or based on the average of the best N values ​​of RI and / or CQI among all resources of the RS group. The differential reporting metrics between different RS sets are similar.

[0103] In the scenario of multiple TRPs for CSI reporting, differential reporting metrics (e.g., differential RI and CQI) may be used for RS groups corresponding to a single RS resource of a single TRP. In some other embodiments of the present application, differential reporting metrics (e.g., differential RI and CQI) may also be between different RS sets and different RS groups for comparison between different TRPs. In addition, there may be reporting metrics (e.g., differential RI and CQI) between RS groups consisting of different set indices and different resource pair indices. An exemplary resource pair index may also be represented by a set index. For example, the RS set index corresponding to the first TRP is 0, the set index corresponding to the second TRP is 1, and the set index corresponding to the resource pair of both the first and second TRPs is 2. Therefore, the RS set index and the RS group index may also be reported in the same field (e.g., as a pair), or in different bit fields.

[0104] In addition to the method, an embodiment of the present application also proposes a device that supports spatial element adaptation.

[0105] For example, Figure 6 A block diagram illustrating a device 600 supporting spatial element adaptation according to some embodiments of the present application.

[0106] like Figure 6As shown in , the device 600 may include at least one non-transitory computer-readable medium 601, at least one receiving circuit system 602, at least one transmitting circuit system 604, and at least one processor 606, which is coupled to the non-transitory computer-readable medium 601, the receiving circuit system 602, and the transmitting circuit system 604. The at least one processor 606 may be a central processing unit (CPU), a digital signaling processor (DSP), a microprocessor, etc. The device 600 may be a RAN node (e.g., a gNB) configured to perform the method described in the above content, etc., or a remote device (e.g., a UE).

[0107] Although in this figure, elements such as at least one processor 606, transmit circuitry 604, and receive circuitry 602 are described in the singular, plural forms are contemplated unless limitation to the singular is explicitly stated. In some embodiments of the present application, receive circuitry 602 and transmit circuitry 604 may be combined into a single device, such as a transceiver. In certain embodiments of the present application, apparatus 600 may further include an input device, a memory, and / or other components.

[0108] In some embodiments of the present application, a non-transitory computer-readable medium 601 may have computer-executable instructions stored thereon to cause a processor to implement a method for a RAN node (e.g., a gNB as described above). For example, when the computer-executable instructions are executed, the processor 606 interacts with the receiving circuit system 602 and the transmitting circuit system 604 to perform the steps for the RAN node as described above.

[0109] In some embodiments of the present application, the non-transitory computer-readable medium 601 may have computer-executable instructions stored thereon to enable the processor to implement a method for a remote device (e.g., a UE as described above). For example, when the computer-executable instructions are executed, the processor 606 interacts with the receiving circuit system 602 and the transmitting circuit system 604 to perform the steps for the remote device as described above.

[0110] Figure 7 is a block diagram of a device 700 supporting spatial element adaptation according to some other embodiments of the present application.

[0111] refer to Figure 7, the apparatus 700 (e.g., a RAN node or a UE) may include at least one processor 702 and at least one transceiver 704 coupled to the at least one processor 702. The transceiver 704 may include at least one separate receive circuit system 706 and transmit circuit system 704, or at least one integrated receive circuit system 706 and transmit circuit system 704. The at least one processor 702 may be a CPU, a DSP, a microprocessor, etc.

[0112] According to some embodiments of the present application, device 700 is a RAN node (e.g., a gNB), which includes: a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: transmit a first signaling indicating at least one RS set, wherein each RS set includes at least one RS resource; determine at least one RS group based on at least one RS set; and receive a report based on at least one RS group or at least one RS set.

[0113] According to some embodiments of the present application, device 700 is a remote device (e.g., UE), which includes: a transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: receive first signaling indicating at least one RS set, wherein each RS set includes at least one RS resource; determine at least one RS group based on at least one RS set; and perform reporting based on at least one of: at least one RS group or at least one RS set.

[0114] The method according to the embodiment of the present application can also be implemented on a programmed processor. However, the controller, flow chart and module can also be implemented on a general or special-purpose computer, a programmed microprocessor or microcontroller and peripheral integrated circuit elements, an integrated circuit, a hardware electronic or logic circuit (such as a discrete element circuit), a programmable logic device, etc. In general, any device capable of implementing the flow chart shown in the figure can be used to implement the processor function of the present application. For example, an embodiment of the present application provides a device including a processor and a memory. Computer programmable instructions for implementing the method are stored in a memory, and the processor is configured to execute the computer programmable instructions to implement the method. The method may be a method as stated above or other methods according to an embodiment of the present application.

[0115] Alternative embodiments preferably implement the method according to the embodiments of the present application in a non-transitory computer-readable storage medium storing computer programmable instructions. The instructions are preferably executed by a computer executable component that is preferably integrated with a network security system. The non-transitory computer-readable storage medium may be stored on any suitable computer-readable medium, such as a random access memory (RAM), a read-only memory (ROM), a flash memory, an electrically erasable programmable read-only memory (EEPROM), an optical storage device (a compact disk (CD) or a digital video disk (DVD)), a hard drive, a floppy disk drive, or any suitable device. The computer executable component is preferably a processor, but the instructions may be executed alternatively or additionally by any suitable dedicated hardware device. For example, an embodiment of the present application provides a non-transitory computer-readable storage medium having computer programmable instructions stored therein. The computer programmable instructions are configured to implement the method as stated above or other methods according to the embodiments of the present application.

[0116] In addition, in the present disclosure, the term "includes, including" or any other variant thereof is intended to cover non-exclusive inclusion, so that the process, method, article or equipment comprising a series of elements not only comprises those elements, but also may comprise other elements that are not explicitly listed or inherent to such process, method, article or equipment. In the absence of more constraints, elements beginning with "a, an" etc. do not exclude the presence of additional identical elements in the process, method, article or equipment comprising the elements. In addition, the term "another" is defined as at least a second or more. The term "having" etc. as used herein is defined as "comprising".

Claims

1. A user equipment UE, comprising: Transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: receiving first signaling indicating at least one reference signal (RS) set, wherein each RS set includes at least one RS resource; determining at least one RS group based on the at least one RS set; and Reporting is performed based on at least one of: the at least one RS group or the at least one RS set.

2. The UE according to claim 1, wherein: The processor is configured to: Receiving second signaling indicating: At least one of: a window size of a set of RSs or at least one time instance of a set of RSs; or The window size of the RS set and the offset of the RS set; or A window size of an RS set, an offset of an RS set, and at least one time instance of an RS set; or One or more RS resource indexes within an RS set in the at least one RS set; or RS set number within the RS group; or The number of time instances of RS sets within an RS group; or RS resource number within the RS group; or The number of RS groups; or The number of elements in each RS group; or at least one port index within each RS resource; and The at least one RS set and the information indicated in the second signaling are used to determine the at least one RS set. RS group.

3. The UE according to claim 2, wherein: In case the second signaling indicates the window size, the at least one time instance of the RS set will be determined based on the window size.

4. The UE according to claim 1, wherein: Each element in the RS group of the at least RS groups is an RS-resource pair.

5. The UE according to claim 4, wherein: The two RS resources in the RS resource pair are from the same RS set or different RS sets.

6. The UE according to claim 1, wherein: The start time for determining the at least one RS group is configured by a medium access control MAC control element CE, a group common downlink control information DCI or a dynamic scheduling DCI.

7. The UE according to claim 1, wherein: The stop time for determining the at least one RS group is configured by a medium access control MAC control element CE, a group common downlink control information DCI or a dynamic scheduling DCI, or is based on a configured or predefined timer.

8. The UE according to claim 1, wherein: The reporting based on at least one of the at least one RS group or the at least one RS set comprises reporting at least one of: Differential reporting metrics on different RS sets; Report metrics differentially for different RS groups; or Metrics are reported differentially both for different RS sets and for different RS groups.

9. The UE according to claim 8, wherein: The reporting based on at least one of the at least one RS group or the at least one RS set further includes reporting at least one of an RS set index or an RS group index.

10. The UE according to claim 8, wherein: The different RS sets include a configured or predefined reference RS set, and the different RS groups include a configured or predefined reference group.

11. The UE according to claim 8, wherein: The differential reporting metric is based on periodic RS resources and aperiodic RS resources in an RS set or RS group, and the RS set or RS group is determined based on the periodic RS resource that is closest to and earlier than the aperiodic RS.

12. The UE according to claim 8, wherein: At least one of the following is based on a report identification: an RS set index or a group index associated with determining the differential reporting metric.

13. The UE according to claim 1, wherein: The time instances at which the reporting is performed are configured to be based on either the time instances of the aperiodic RS or based on events associated with the differentially reported metrics.

14. A radio access network RAN ​​node, comprising: Transceiver; and a processor coupled to the transceiver, wherein the processor is configured to: Transmitting first signaling indicating at least one reference signal (RS) set, wherein each RS set includes at least one RS resource; determining at least one RS group based on the at least one RS set; and A report is received based on at least one of the at least one RS group or the at least one RS set.

15. A wireless communication method, comprising: receiving first signaling indicating at least one reference signal (RS) set, wherein each RS set includes at least one RS resource; determining at least one RS group based on the at least one RS set; and Reporting is performed based on at least one of: the at least one RS group or the at least one RS set.

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