Systems and methods for SRS configurations
Adaptive SRS port indication and power sharing methods improve SRS configurations by addressing inefficiencies in existing systems, enhancing signal measurement and reducing energy consumption.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZTE CORP
- Filing Date
- 2025-02-10
- Publication Date
- 2026-06-11
AI Technical Summary
Existing wireless communication systems face inefficiencies in reference signal configurations, particularly for SRS, leading to signal degradation due to blocked antenna ports and increased energy consumption, as they lack flexible port indication and adaptive mapping capabilities.
Implementing adaptive SRS port indication methods through RRC, MAC CE, and DCI signaling to allow flexible port association, cancellation of unnecessary port transmissions, and power sharing among active ports, along with QCL association with other reference signals to enhance measurement efficiency.
Enhances signal measurement and transmission efficiency by reducing overhead and energy consumption, while enabling effective antenna port utilization even in obstructed conditions.
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Figure CN2025076629_11062026_PF_FP_ABST
Abstract
Description
SYSTEMS AND METHODS FOR SRS CONFIGURATIONSTECHNICAL FIELD
[0001] The disclosure relates generally to wireless communications, including but not limited to systems and methods for SRS configurations.BACKGROUND
[0002] The standardization organization Third Generation Partnership Project (3GPP) is currently in the process of specifying a new Radio Interface called 5G New Radio (5G NR) as well as a Next Generation Packet Core Network (NG-CN or NGC) . The 5G NR will have three main components: a 5G Access Network (5G-AN) , a 5G Core Network (5GC) , and a User Equipment (UE) . In order to facilitate the enablement of different data services and requirements, the elements of the 5GC, also called Network Functions, have been simplified with some of them being software based, and some being hardware based, so that they could be adapted according to need.SUMMARY
[0003] The example embodiments disclosed herein are directed to solving the issues relating to one or more of the problems presented in the prior art, as well as providing additional features that will become readily apparent by reference to the following detailed description when taken in conjunction with the accompany drawings. In accordance with various embodiments, example systems, methods, devices and computer program products are disclosed herein. It is understood, however, that these embodiments are presented by way of example and are not limiting, and it will be apparent to those of ordinary skill in the art who read the present disclosure that various modifications to the disclosed embodiments can be made while remaining within the scope of this disclosure.
[0004] At least one aspect is directed to a system, method, apparatus, or a computer-readable medium of the following. A method can include receiving, by a wireless communication device from a wireless communication node, a first message. The first message can indicate port information associated with a reference signal. The method can include sending, by the wireless communication device to the wireless communication node, the reference signal.
[0005] the port information can be indicated per reference signal resource for the reference signal. The method can include determining the by the wireless communication device, port index information of the reference signal. The port index information refers to one or more port indices associated with the reference signal. The port index information can be determined based on at least one of the port information can be received in the first message: a time domain resource or a frequency resource. A first portion of the port information can be included in the first message, the first portion of the port information can include at least one of a set of restricted ports, port indices, group (s) of ports, an index of one entry in a list of port indices, or a list indicating the port indices.
[0006] Each entry of the list of port indices includes one or more port indices. A second portion of the port information can be included in the first message , the second portion of the port information can include at least one of an indication that a number of Ant-Ports and / or associated port indices can be flexible or an indication that a function of flexible port association can be enabled or disabled. The wireless communication node can receive from the wireless communication device, a second signaling including at least one of UE capability report, UE request, port assist information.
[0007] The port assist information can include at least one of port group, port grouping parameter, or pair list. The first portion of the port information are indicated via a second message. The method can include prior to sending the reference signal, sending, by the wireless communication device to the wireless communication node, a third message indicating the port information for the reference signal. The first portion of the port information can be modified by a third message. The third message can be at least one of a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling.
[0008] The first message or the second message can be at least one of RRC signaling, a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling. The port information can be configured per reference signal within a resource set for the reference signal. The port information can include X which represents a total number of ports for all reference signal included in the resource set, wherein the port index (ices) associated with each reference signal can be determined by the number of ports per reference signal and X.
[0009] Transmission of the reference signal with remaining ports can be canceled. The remaining ports can be determined by a number of the ports and port information configured for the reference signal. Power configured for transmitting via the remaining ports can be used for transmission via the indicated ports. Usage of the power for the transmitting via the remaining ports occurs when at least one condition can be satisfied, the at least one condition including an indicated port and the remaining ports are in the same time domain resource, or a power of the remaining ports can be equally shared among the indicated ports. The port information can be portion of TCI / QCL information when the associated reference signal can be included in the TCI / QCL information wherein the reference signal includes at least one of a Sounding Reference Signal (SRS) , CSI-RS, or a DM-RS.BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Various example embodiments of the present solution are described in detail below with reference to the following figures or drawings. The drawings are provided for purposes of illustration only and merely depict example embodiments of the present solution to facilitate the reader’s understanding of the present solution. Therefore, the drawings should not be considered limiting of the breadth, scope, or applicability of the present solution. It should be noted that for clarity and ease of illustration, these drawings are not necessarily drawn to scale.
[0011] FIG. 1 illustrates an example cellular communication network in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure;
[0012] FIG. 2 illustrates a block diagram of an example base station and a user equipment device, in accordance with some embodiments of the present disclosure;
[0013] FIG. 3 depicts an example of a different Ant Layout, in accordance with an embodiment of the present disclosure;
[0014] FIG. 4 depicts an example of a flowchart for a port set restriction, in accordance with an embodiment of the present disclosure;
[0015] FIG. 5 depicts an example of the subbands, in accordance with an embodiment of the present disclosure;
[0016] FIG. 6 depicts a flowchart for configuring the SRS, in accordance with an embodiment of the present disclosure;
[0017] FIG. 7 depicts a flowchart of a method for SRS configurations, in accordance with an embodiment of the present disclosure.DETAILED DESCRIPTION
[0018] A. Mobile Communication Technology and Environment
[0019] FIG. 1 illustrates an example wireless communication network, and / or system, 100 in which techniques disclosed herein may be implemented, in accordance with an embodiment of the present disclosure. In the following discussion, the wireless communication network 100 may be any wireless network, such as a cellular network or a narrowband Internet of things (NB-IoT) network, and is herein referred to as “network 100. ” Such an example network 100 includes a base station 102 (hereinafter “BS 102” ; also referred to as wireless communication node) and a user equipment device 104 (hereinafter “UE 104” ; also referred to as wireless communication device) that can communicate with each other via a communication link 110 (e.g., a wireless communication channel) , and a cluster of cells 126, 130, 132, 134, 136, 138 and 140 overlaying a geographical area 101. In Figure 1, the BS 102 and UE 104 are contained within a respective geographic boundary of cell 126. Each of the other cells 130, 132, 134, 136, 138 and 140 may include at least one base station operating at its allocated bandwidth to provide adequate radio coverage to its intended users.
[0020] For example, the BS 102 may operate at an allocated channel transmission bandwidth to provide adequate coverage to the UE 104. The BS 102 and the UE 104 may communicate via a downlink radio frame 118, and an uplink radio frame 124 respectively. Each radio frame 118 / 124 may be further divided into sub-frames 120 / 127 which may include data symbols 122 / 128. In the present disclosure, the BS 102 and UE 104 are described herein as non-limiting examples of “communication nodes, ” generally, which can practice the methods disclosed herein. Such communication nodes may be capable of wireless and / or wired communications, in accordance with various embodiments of the present solution.
[0021] FIG. 2 illustrates a block diagram of an example wireless communication system 200 for transmitting and receiving wireless communication signals (e.g., OFDM / OFDMA signals) in accordance with some embodiments of the present solution. The system 200 may include components and elements configured to support known or conventional operating features that need not be described in detail herein. In one illustrative embodiment, system 200 can be used to communicate (e.g., transmit and receive) data symbols in a wireless communication environment such as the wireless communication environment 100 of Figure 1, as described above.
[0022] System 200 generally includes a base station 202 (hereinafter “BS 202” ) and a user equipment device 204 (hereinafter “UE 204” ) . The BS 202 includes a BS (base station) transceiver module 210, a BS antenna 212, a BS processor module 214, a BS memory module 216, and a network communication module 218, each module being coupled and interconnected with one another as necessary via a data communication bus 220. The UE 204 includes a UE (user equipment) transceiver module 230, a UE antenna 232, a UE memory module 234, and a UE processor module 236, each module being coupled and interconnected with one another as necessary via a data communication bus 240. The BS 202 communicates with the UE 204 via a communication channel 250, which can be any wireless channel or other medium suitable for transmission of data as described herein.
[0023] As would be understood by persons of ordinary skill in the art, system 200 may further include any number of modules other than the modules shown in Figure 2. Those skilled in the art will understand that the various illustrative blocks, modules, circuits, and processing logic described in connection with the embodiments disclosed herein may be implemented in hardware, computer-readable software, firmware, or any practical combination thereof. To clearly illustrate this interchangeability and compatibility of hardware, firmware, and software, various illustrative components, blocks, modules, circuits, and steps are described generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware, or software can depend upon the particular application and design constraints imposed on the overall system. Those familiar with the concepts described herein may implement such functionality in a suitable manner for each particular application, but such implementation decisions should not be interpreted as limiting the scope of the present disclosure
[0024] In accordance with some embodiments, the UE transceiver 230 may be referred to herein as an “uplink” transceiver 230 that includes a radio frequency (RF) transmitter and a RF receiver each can include circuitry that is coupled to the antenna 232. A duplex switch (not shown) may alternatively couple the uplink transmitter or receiver to the uplink antenna in time duplex fashion. Similarly, in accordance with some embodiments, the BS transceiver 210 may be referred to herein as a “downlink” transceiver 210 that includes a RF transmitter and a RF receiver each can include circuity that is coupled to the antenna 212. A downlink duplex switch may alternatively couple the downlink transmitter or receiver to the downlink antenna 212 in time duplex fashion. The operations of the two transceiver modules 210 and 230 may be coordinated in time such that the uplink receiver circuitry is coupled to the uplink antenna 232 for reception of transmissions over the wireless transmission link 250 at the same time that the downlink transmitter is coupled to the downlink antenna 212. Conversely, the operations of the two transceivers 210 and 230 may be coordinated in time such that the downlink receiver is coupled to the downlink antenna 212 for reception of transmissions over the wireless transmission link 250 at the same time that the uplink transmitter is coupled to the uplink antenna 232. In some embodiments, there is close time synchronization with a minimal guard time between changes in duplex direction.
[0025] The UE transceiver 230 and the base station transceiver 210 are configured to communicate via the wireless data communication link 250, and cooperate with a suitably configured RF antenna arrangement 212 / 232 that can support a particular wireless communication protocol and modulation scheme. In some illustrative embodiments, the UE transceiver 210 and the base station transceiver 210 are configured to support industry standards such as the Long Term Evolution (LTE) and emerging 5G standards, and the like. It is understood, however, that the present disclosure is not necessarily limited in application to a particular standard and associated protocols. Rather, the UE transceiver 230 and the base station transceiver 210 may be configured to support alternate, or additional, wireless data communication protocols, including future standards or variations thereof.
[0026] In accordance with various embodiments, the BS 202 may be an evolved node B (eNB) , a serving eNB, a target eNB, a femto station, or a pico station, for example. In some embodiments, the UE 204 may be embodied in various types of user devices such as a mobile phone, a smart phone, a personal digital assistant (PDA) , tablet, laptop computer, wearable computing device, etc. The processor modules 214 and 236 may be implemented, or realized, with a general purpose processor, a content addressable memory, a digital signal processor, an application specific integrated circuit, a field programmable gate array, any suitable programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof, designed to perform the functions described herein. In this manner, a processor may be realized as a microprocessor, a controller, a microcontroller, a state machine, or the like. A processor may also be implemented as a combination of computing devices, e.g., a combination of a digital signal processor and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a digital signal processor core, or any other such configuration.
[0027] Furthermore, the steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in firmware, in a software module executed by processor modules 214 and 236, respectively, or in any practical combination thereof. The memory modules 216 and 234 may be realized as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art. In this regard, memory modules 216 and 234 may be coupled to the processor modules 210 and 230, respectively, such that the processors modules 210 and 230 can read information from, and write information to, memory modules 216 and 234, respectively. The memory modules 216 and 234 may also be integrated into their respective processor modules 210 and 230. In some embodiments, the memory modules 216 and 234 may each include a cache memory for storing temporary variables or other intermediate information during execution of instructions to be executed by processor modules 210 and 230, respectively. Memory modules 216 and 234 may also each include non-volatile memory for storing instructions to be executed by the processor modules 210 and 230, respectively.
[0028] The network communication module 218 generally represents the hardware, software, firmware, processing logic, and / or other components of the base station 202 that enable bi-directional communication between base station transceiver 210 and other network components and communication nodes configured to communication with the base station 202. For example, network communication module 218 may be configured to support internet or WiMAX traffic. In a typical deployment, without limitation, network communication module 218 provides an 802.3 Ethernet interface such that base station transceiver 210 can communicate with a conventional Ethernet based computer network. In this manner, the network communication module 218 may include a physical interface for connection to the computer network (e.g., Mobile Switching Center (MSC) ) . The terms “configured for, ” “configured to” and conjugations thereof, as used herein with respect to a specified operation or function, refer to a device, component, circuit, structure, machine, signal, etc., that is physically constructed, programmed, formatted and / or arranged to perform the specified operation or function.
[0029] The Open Systems Interconnection (OSI) Model (referred to herein as, “open system interconnection model” ) is a conceptual and logical layout that defines network communication used by systems (e.g., wireless communication device, wireless communication node) open to interconnection and communication with other systems. The model is broken into seven subcomponents, or layers, each of which represents a conceptual collection of services provided to the layers above and below it. The OSI Model also defines a logical network and effectively describes computer packet transfer by using different layer protocols. The OSI Model may also be referred to as the seven-layer OSI Model or the seven-layer model. In some embodiments, a first layer may be a physical layer. In some embodiments, a second layer may be a Medium Access Control (MAC) layer. In some embodiments, a third layer may be a Radio Link Control (RLC) layer. In some embodiments, a fourth layer may be a Packet Data Convergence Protocol (PDCP) layer. In some embodiments, a fifth layer may be a Radio Resource Control (RRC) layer. In some embodiments, a sixth layer may be a Non Access Stratum (NAS) layer or an Internet Protocol (IP) layer, and the seventh layer being the other layer.
[0030] Various example embodiments of the present solution are described below with reference to the accompanying figures to enable a person of ordinary skill in the art to make and use the present solution. As would be apparent to those of ordinary skill in the art, after reading the present disclosure, various changes or modifications to the examples described herein can be made without departing from the scope of the present solution. Thus, the present solution is not limited to the example embodiments and applications described and illustrated herein. Additionally, the specific order or hierarchy of steps in the methods disclosed herein are merely example approaches. Based upon design preferences, the specific order or hierarchy of steps of the disclosed methods or processes can be re-arranged while remaining within the scope of the present solution. Thus, those of ordinary skill in the art will understand that the methods and techniques disclosed herein present various steps or acts in a sample order, and the present solution is not limited to the specific order or hierarchy presented unless expressly stated otherwise.
[0031] B. SYSTEMS AND METHODS FOR SRS CONFIGURATIONS
[0032] In the legacy system (e.g., 4G, 5G) , as the most important component, the configuration of the reference signal (e.g., channel state information (CSI-RS) , sounding reference signal (SRS) , de-modulation reference signal (DM-RS) ) can be essential to enable the measurement / report, especially for multiple input and output system (MIMO) . For example, to enable the MIMO related measurement for either DL or UL, the reference resource with more than one port can be configured, e.g., SRS with However, for the given number of Antport configured by RRC parameter, the represented AntPort always are assumed consecutively, i.e., if the port index can be pi= {1000, 1001} . FIG. 3 depicts an example of a different Ant Layout 300.
[0033] In some cases, since the transmission and / or reception of partial Ant may be blocked by the human body or other component, it will lead to the degradation of signal strength. To enable the efficient measurement and indication of such event, including following DL / UL measurement and transmission indication, the enabling of flexible port indication for one RS should be supported. For example, by assuming the Ant#1~4 are associated with Port#1~4 for SRS transmission, if the Ant#2 and Ant#4 are blocked, to enable the more efficient UL measurement with reduced RS overhead and energy consumption, it’s better to transmit a 2-ports SRS mapped to Port#1 and Port#3. But, in the legacy system, it’s always mapped to Port#1 and Port#2. And the transmission with either 4-ports SRS or two SRSs cannot address the issues.
[0034] In existing system, the configuration of the RS, e.g., SRS, can be via the RRC signaling, to control the parameters of each RS, e.g., resource location, number of antenna port, as below:
[0035] It can be observed that for each SRS resource configured with it always corresponds to the port number sequentially, i.e., pi=1000+i.
[0036] The aforementioned issues described herein cannot be addressed, and new solution with higher flexibility and lower reference resource overhead can be expected.
[0037] Embodiment-1: → Adaptive SRS port indication per SRS resource
[0038] To enable the adaptive mapping between SRS resource and its associated port index, a plurality of cases can be considered (e.g., the port information can be configured by the signaling, such as RRC, MAC CE, DCI, or combined signaling) .
[0039] In some cases, whether to support the adaptive operation can be part of UE capability. In some cases, the indication can either indicate the used / available / recommended port information or non-used / available / recommended. In some cases, the port number associated to the SRS resource can be sequentially selected, but only from the set of port.
[0040] In one example, the indication of set of port can be signaled from the BS to the UE via higher layer signaling. For example, in RRC, the resource configuration of SRS (e.g., which can be applied for all resource instead of per resource) , one IE (information element) can be introduced to indicate the applicable port group information (e.g., {Port-1, Port-3, Port-4, Port-6} ) . For the Yth SRS as the 2-port SRS, the 1st two, i.e., Port-1, Port-3, can be sequentially associated. FIG. 4 depicts an example of a flowchart 400 for a port set restriction.
[0041] In some cases, the port set can be indicated via a bitmap (e.g., for the UE supported 8 ports (e.g., via the capability report) , 11010011 can be to indicate the available port information once the corresponding value of the bit can be 1) . For example, in MAC CE signaling, the SRS (e.g., semi-persistent, aperiodic) , the MAC CE can be used to indicate the applicable port group information. The corresponding signaling can be either send to the UE with a dedicated MAC CE or as part of the MAC CE to trigger the transmission of SRS.
[0042] In the resource configuration of each resource, one IE (information element) can be introduced to indicate associated port index. For example, Associated RS-Ports = {n1, n2} or {n3, n5} , {n1. n3, n4} ;
[0043] In one example, if the associated port index can be configured, the number of Ant port supported for this SRS resource can be implicitly determined by the number of value in AssociatedSRS-Ports. For example, if AssociatedSRS-Ports = {n3, n5} , the number of Ant port for this resource can be 2. The maximum number of Ant port supported by the device can be obtained at gNB side by receiving the UE capability. In one example, without configuration of this IE, the association can be following the sequentially mapping approach by default.
[0044] In the resource configuration of each resource, one IE (information element) can be introduced to indicate the associated port index or groups of port, such as, after receiving the reporting (e.g., UE capability report or port group / pair list reporting) . For example,
[0045] The IE can indicate the “Index” or partial index (if additional restriction, e.g., availability condition at UE side, can be reported by UE to gNB or / known at gNB side) in the above list. The number of Ant port supported for this SRS resource can be implicitly determined by the number of index in AssociatedSRS-Ports.
[0046] In another example, if different lists are used per number of Ports per group (e.g., List-1 for port group / pairing with for two ports, List-2 for port group / pairing with for three ports) , the selection of the list can be implicitly indicated by the IE nrofSRS-Ports.
[0047] In the resource configuration of each resource, an indicator (e.g., RRC IE) can be included to inform the UE that the Number of Ant-Port and / or associated port index can be flexible. For example, in the RRC configuration, a new indicator (e.g., FlexibleAssociatedSRS-Ports =Enabled can be used to only enable or enable / disable the function (e.g., flexible port association) .
[0048] In one example, in the RRC configuration, a new indicator (e.g., AI-enabled-measurementSRS = Enabled) can be used to only enable or enable / disable the function (i.e., once the AI based UL can be enabled) . The gNB may derive the full channel information via only measuring the sub-set of the channel (e.g., channel in spatial domain) . In some case, the port selection of port, or condition for port selection, can be exchanged (e.g., configured by gNB to UE or vice versa) as part of assistant information for AI related method, e.g., part of configuration for performance monitoring.
[0049] In one example, in the RRC configuration, the new value, e.g., “Flexible / adaptive / None” can be indicated as nrofSRS-Ports = {n1, n2, n3, n4, flexible / adaptive} (i.e., as one of the candidate value) , AssociatedSRS-Ports = flexible / adaptive / None, or “flexible / adaptive / None” as one of row in the aforementioned port group / pair list. In above examples, the associated Ant-port can be indicated by another RRC signaling (e.g., the 2nd RRC signaling) to indicate the associated port, by the MAC CE signaling (e.g., in the MAC CE signaling indication, a field can be included in MAC CE to indicate the port (s) information for each SRS resource) , by the DCI signaling (e.g., the “Index” , one DCI filed , jointly encoded bits with resource indication of SRI, or partial of “bits” in the bitfield for SRS indication can be used to indicate the port (s) information) , or according to other information related to the SRS resource (e.g., Resource information, such as, one additionally list can be configured to inform the association between port and time (e.g., symbol) and / or frequency information (e.g., RBs, subband) . FIG. 5 depicts an example of the subbands 500. Once the resource can be SRS can be configured, the port information can be obtained. The flexibility can be achieved via the resource allocation.
[0050] In some examples, the association between port and resource can be sequentially mapped. In some cases, the association between port and resource can be mapped per two ports. The Ant-port can be indicated by the port information associated to this SRS can be informed by the UE to BS, as shown in FIG. 6. FIG. 6 depicts a flowchart 600 for configuring the SRS.
[0051] For example, in Step-X, before the sending of SRS, an UL signaling can be sent from UE to BS to inform the port information, which can be either before or after the configuration of the SRS (e.g., for periodic, before the configuration and for semi- / periodic, after the configuration can be also possible) . The signaling can be one of UL request, e.g., scheduling request, Buffer status report request, sounding request, or other requests to trigger the measurement initialized by the UE.
[0052] In another example, the UE can send the SRS in Step-Z with the port information reported in Step-X for this SRS before. In Step-Y1, the BS may send the scheduling information (e.g., DCI, MAC CE) to UE to trigger the SRS transmission, e.g., aperiodic or semi-persistent SRS transmission. In another example, in Step-X, the UE may send the port index (es) or Index of content in the Port (s) group List, (e.g., which can be reported by UE before) . In Step-X, the UE may send the more than one port or port group information for Yth SRS. The port information can be derived by indicating the port grouping information (e.g., {Port-1, Port-2} , {Port-3, Port-5) or a parameter to derive the port information. For example, if the NumofPort (e.g., 3) information can be included in the configuration of Step-1, a parameter (e.g., with value X (X =2) ) can be used to determine the port grouping with the predefined rule as (e.g., port grouping cycling jointly determined by {NumofPort, parameter X} ) (e.g., if the maximum number of Port supported by UE: {Port-1, Port-2, Port-3} , {Port-3, Port-4, Port-5} , {Port-5, Port-6, Port-1} ) . In another example, the recommended port for SRS from UE side can be determined by the configured threshold, (e.g., for the SRS, which can be associated with one CSI-RS (e.g., QCLed or indicated by TCI or spatial filter) , if the received signal strength (e.g., RSRP, RSRQ, SINR) at each Rx port can be different (e.g., exceed the threshold configured BS) , the port can be assumed not to be part of the report port group) , or the available ports can be determined according to the candidate TPMI, which can be used for UL transmission (e.g., if port 2 / 3 / 4 / 5 and 8 can be available (e.g., determined by signal) , but only 2-5 ports are reported if the candidate codebook for UL can be for these ports.
[0053] In another example, the report of the port information can be triggered by the UE can be configured to report (e.g., periodically) , the UE can be triggered by higher layer (e.g., the UE identifies that some of ports are blocked by human body (e.g., hand or head) ) .
[0054] In some cases, for each RS resource (e.g., semi-persistent SRS or aperiodic SRS, the MAC CE signaling can be used to modify the port information of the SRS information) . For example, in the MAC CE signaling as listed below:
[0055] For the Field-2, in some examples, it can be used to as a flag to indicate whether the port infor can be updated. If so, following the indication can be Field-3.
[0056] In the Field-1, which can be used to indicate the SRS resource index or SRS resource set index and SRS resource index.
[0057] In one example, the indication in Field-3 can be the “Index” of the aforementioned list.
[0058] In some cases, for SRS transmission (e.g., aperiodic SRS transmission) one DCI filed or partial of “bits” in the bitfield for SRS indication can be used to indicate the port (s) information. In one example, the indication can be the “Index” of the aforementioned list.
[0059] Embodiment-2: → Adaptive SRS port indication per SRS resource set
[0060] For the SRS indication, more than one SRS resources are included in one SRS resource set, e.g., for Set-1 {SRS1, SRS2, SRS3, SRS4} are indicated. To support the efficiently UL sounding or antenna switching, the ports for each resource within the same Set can be indicated. In some cases, for the configuration of Set-1, the configuration of Set-1 can be the total number of support AntPort (e.g., X = 8) and a number of AntPort per SRS resource (e.g., Y = 2) , that are indicated to UE. The ports can be sequentially mapped to each resource (e.g., Port-1 &2 for SRS1, Port-3 &4 for SRS2, etc. ) . In some cases, the number of AntPot per SRS resource can be different, which can be either indicated in the configuration per SRS resource (e.g., or indicated in the SRS set configuration (e.g., NumberOfPortPerSRSresource = {1, 2, 2, 3) ) } . For each SRS, the corresponding port can be Port-1 for SRS1, Port-2 and 3 for SRS2, Port 4 and 5 for SRS3, and Port 6-8 for SRS4.
[0061] Embodiment-3: → Cancelling of the SRS transmission
[0062] In some cases, for the pth SRS with N-ports (e.g., configured by N_” ap” ^” SRS” ) , if only M ports (e.g., M<N) are indicated to associate with pth SRS. The transmission of M+1, …N ports can be cancelled. The indicated M ports can be sequentially associated to this SRS. In some examples, the indication of M port (e.g., determined by one of the methods mentioned above) can be via an indication (e.g., RRC, MAC CE) of Value M. In some examples, the function can be enabled / disabled by the BS signaling. The transmission of the M-N ports, which can be not part of M ports, can be cancelled. For example, if N = 4, M = 2 ports (e.g., Port-1, 3) are indicated. Then, for this SRS with 4-ports, the transmission of port-1 and port-3 are kept and others are cancelled.
[0063] In some cases, if the transmission of part of ports are cancelled, the transmission power can be used for the transmission of other ports which are in same the resource (e.g., symbol and / or RBs) . For example, for ports {1000, 1001, 1004, 1005} in same symbol, if 1005 and 1001 are cancelled, the power can be used for {1000 and 1004} . If all ports for one SRS are transmitted in different resource, e.g., {1000, 1001, 1004, 1005} and {1002, 1003, 1006, 1007} in mth symbol and nth symbol respectively. Then, if only ports in one symbol (e.g., {1002, 1003, 1006, 1007} ) are cancelled, the equally power split cross all ports are still assumed. If different number of ports in different resource, (e.g., symbol, are cancelled, the equally power split cross all ports are still assumed) .
[0064] Embodiment-4: → QCL association between SRS with UL reference signal
[0065] If anther reference signal (e.g., DM-RS) can be assumed to be QCL with SRS, which can be conducted in reference signal level (e.g., SRS1 can be assumed as the QCL source of TCI indication, which can be for DM-RS used for PUSCH transmission) . If the adaptive reference point can be supported, the port information can be configured as part of TCI / QCL information, for example:
[0066] In some examples, the portInfor refers to the information which configured by the BS, e.g., as portion of the port information. In some example, the portInfor refers to the port index (e.g., one or more) determined by the UE, e.g., according to the received port information.
[0067] FIG. 7 depicts a flowchart of a method 700 for SRS configurations. The method 700 can be implemented by the components of the system 100 or the system 200 as described herein. In an overview, at step 705, a wireless communication node can send a first message to the wireless communication device. At step 710, the wireless communication device can receive the first message. At step 715, the wireless communication device can send a reference signal to the wireless communication device. At step 720, the wireless communication node can receive the reference signal.
[0068] At step 705, a wireless communication node can send a first message to the wireless communication device. The first message can indicate port information associated with a reference signal. The port information can be indicated per reference signal resource for the reference signal. A first portion of the port information can be included in the first message. The first portion of the port information can include at least one of a set of restricted ports, port indices, group (s) of ports, an index of the one entry in a list of port indices, or a list indicating the port indices. Each entry of the list of port indices includes one or more port indices. A second portion of the port information can be included in the first message. The second portion of the port information can include at least one of an indication that a number of Ant-Ports and / or associated port indices can be flexible or an indication that the function of flexible port association can be enabled or disabled. The wireless communication node can receive from the wireless communication device, the second signaling including at least one of UE capability report, UE request, port assist information. The port assist information can include at least one of port group, port grouping parameter, or pair list. The first portion of port information are indicated via a second message
[0069] At step 710, the wireless communication device can receive the first message. The wireless communication device can determine the port index information of the reference signal. The port index information can refer to the one or more port indices associated with the reference signal. The port index information can be determined based on at least one of the port information received in the first message, the time domain resource, or the frequency resource. Prior to sending the reference signal, the wireless communication device can send to the wireless communication node, a third message indicating the port information for the reference signal. The first portion of the port information can be modified by a third message. The third message can be at least one of a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling. The first message or the second message can be at least one of RRC signaling, a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling.
[0070] At step 715, the wireless communication device can send a reference signal. The port information can be configured per reference signal within a resource set for the reference signal. The port information can include X, wherein X represents the total number of ports for all reference signal included in the resource set, wherein the port index (ices) associated with each reference signal can be determined by the number of ports per reference signal and X. Transmission of the reference signal with remaining ports can be canceled. The remaining ports can be determined by the number of the ports and port information configured for the reference signal. Power configured for transmitting via the remaining ports can be used for transmission via the indicated ports. Usage of the power for the transmitting via the remaining ports occurs when at least one of the following conditions are satisfied: an indicated port and the remaining ports are in the same time domain resource; or a power of the remaining ports can be equally shared among the indicated ports. The port information can be portion of TCI / QCL information when the associated reference signal can be included in the TCI / QCL information
[0071] At step 720, the wireless communication node can receive the reference signal. The reference signal includes at least one of a Sounding Reference Signal (SRS) , CSI-RS, or a DM-RS.
[0072] While various embodiments of the present solution have been described above, it should be understood that they have been presented by way of example only, and not by way of limitation. Likewise, the various diagrams may depict an example architectural or configuration, which are provided to enable persons of ordinary skill in the art to understand example features and functions of the present solution. Such persons would understand, however, that the solution is not restricted to the illustrated example architectures or configurations but can be implemented using a variety of alternative architectures and configurations. Additionally, as would be understood by persons of ordinary skill in the art, one or more features of one embodiment can be combined with one or more features of another embodiment described herein. Thus, the breadth and scope of the present disclosure should not be limited by any of the above-described illustrative embodiments.
[0073] It is also understood that any reference to an element herein using a designation such as “first, ” “second, ” and so forth does not generally limit the quantity or order of those elements. Rather, these designations can be used herein as a convenient means of distinguishing between two or more elements or instances of an element. Thus, a reference to first and second elements does not mean that only two elements can be employed, or that the first element must precede the second element in some manner.
[0074] Additionally, a person having ordinary skill in the art would understand that information and signals can be represented using any of a variety of different technologies and techniques. For example, data, instructions, commands, information, signals, bits and symbols, for example, which may be referenced in the above description can be represented by voltages, currents, electromagnetic waves, magnetic fields or particles, optical fields or particles, or any combination thereof.
[0075] A person of ordinary skill in the art would further appreciate that any of the various illustrative logical blocks, modules, processors, means, circuits, methods and functions described in connection with the aspects disclosed herein can be implemented by electronic hardware (e.g., a digital implementation, an analog implementation, or a combination of the two) , firmware, various forms of program or design code incorporating instructions (which can be referred to herein, for convenience, as “software” or a “software module) , or any combination of these techniques. To clearly illustrate this interchangeability of hardware, firmware and software, various illustrative components, blocks, modules, circuits, and steps have been described above generally in terms of their functionality. Whether such functionality is implemented as hardware, firmware or software, or a combination of these techniques, depends upon the particular application and design constraints imposed on the overall system. Skilled artisans can implement the described functionality in various ways for each particular application, but such implementation decisions do not cause a departure from the scope of the present disclosure.
[0076] Furthermore, a person of ordinary skill in the art would understand that various illustrative logical blocks, modules, devices, components and circuits described herein can be implemented within or performed by an integrated circuit (IC) that can include a general-purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, or any combination thereof. The logical blocks, modules, and circuits can further include antennas and / or transceivers to communicate with various components within the network or within the device. A general-purpose processor can be a microprocessor, but in the alternative, the processor can be any conventional processor, controller, or state machine. A processor can also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other suitable configuration to perform the functions described herein.
[0077] If implemented in software, the functions can be stored as one or more instructions or code on a computer-readable medium. Thus, the steps of a method or algorithm disclosed herein can be implemented as software stored on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that can be enabled to transfer a computer program or code from one place to another. A storage media can be any available media that can be accessed by a computer. By way of example, and not limitation, such computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired program code in the form of instructions or data structures and that can be accessed by a computer.
[0078] In this document, the term “module” as used herein, refers to software, firmware, hardware, and any combination of these elements for performing the associated functions described herein. Additionally, for purpose of discussion, the various modules are described as discrete modules; however, as would be apparent to one of ordinary skill in the art, two or more modules may be combined to form a single module that performs the associated functions according to embodiments of the present solution.
[0079] Additionally, memory or other storage, as well as communication components, may be employed in embodiments of the present solution. It will be appreciated that, for clarity purposes, the above description has described embodiments of the present solution with reference to different functional units and processors. However, it will be apparent that any suitable distribution of functionality between different functional units, processing logic elements or domains may be used without detracting from the present solution. For example, functionality illustrated to be performed by separate processing logic elements, or controllers, may be performed by the same processing logic element, or controller. Hence, references to specific functional units are only references to a suitable means for providing the described functionality, rather than indicative of a strict logical or physical structure or organization.
[0080] Various modifications to the embodiments described in this disclosure will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other embodiments without departing from the scope of this disclosure. Thus, the disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the novel features and principles disclosed herein, as recited in the claims below.
Claims
1.A wireless communication method, comprising:receiving, by a wireless communication device from a wireless communication node, a first message, wherein the first message indicates port information associated with a reference signal; andsending, by the wireless communication device to the wireless communication node, the reference signal.2.The wireless communication method of claim 1, wherein the port information is indicated per reference signal resource for the reference signal.3.The wireless communication method of claim 1, further comprising:determining the by the wireless communication device, port index information of the reference signal, wherein the port index information refers to one or more port indices associated with the reference signal.4.The wireless communication method of claim 3, the port index information is determined based on at least one of the port information is received in the first message: a time domain resource or a frequency resource.5.The wireless communication method of claim 1, wherein a first portion of the port information is included in the first message, the first portion of the port information comprising at least one of a set of restricted ports, port indices, group (s) of ports, an index of one entry in a list of port indices, or a list indicating the port indices.6.The wireless communication method of claim 5, wherein each entry of the list of port indices includes one or more port indices.7.The wireless communication method of claim 1, wherein a second portion of the port information is included in the first message , the second portion of the port information comprising at least one of an indication that a number of Ant-Ports and / or associated port indices is flexible or an indication that a function of flexible port association is enabled or disabled.8.The wireless communication method of claim 5 or 7, wherein the wireless communication node receives from the wireless communication device, a second signaling including at least one of UE capability report, UE request, port assist information.9.The wireless communication method of claim 8, wherein the port assist information comprises at least one of port group, port grouping parameter, or pair list.10.The wireless communication method of claim 7, wherein the first portion of the port information are indicated via a second message.11.The wireless communication method of claim 1 or 7, further comprising:prior to sending the reference signal, sending, by the wireless communication device to the wireless communication node, a third message indicating the port information for the reference signal.12.The wireless communication method of claim 5 or 7, wherein the first portion of the port information can be modified by a third message.13.The wireless communication method of claim 12, wherein the third message is at least one of a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling.14.The wireless communication method of claim 5, 7, or 10, wherein the first message or the second message is at least one of RRC signaling, a Medium Access Control (MAC) Control Element (CE) , or a Downlink Control Information (DCI) signaling.15.The wireless communication method of claim 1, wherein the port information is configured per reference signal within a resource set for the reference signal.16.The wireless communication method of claim 15, wherein the port information comprises X, wherein X represents a total number of ports for all reference signal included in the resource set, wherein the port index (ices) associated with each reference signal is determined by the number of ports per reference signal and X.17.The wireless communication method of claim 1, wherein transmission of the reference signal with remaining ports is canceled.18.The wireless communication method of claim 17, wherein the remaining ports is determined by a number of the ports and port information configured for the reference signal.19.The wireless communication method of claim 18, wherein power configured for transmitting via the remaining ports is used for transmission via the indicated ports.20.The wireless communication method of claim 19, wherein usage of the power for the transmitting via the remaining ports occurs when at least one condition is satisfied, the at least one condition including an indicated port and the remaining ports are in the same time domain resource, or a power of the remaining ports is equally shared among the indicated ports.21.The wireless communication method of claim 1, wherein the port information is portion of TCI / QCL information when the associated reference signal is included in the TCI / QCL information.22.The wireless communication method of claim 1, wherein the reference signal includes at least one of a Sounding Reference Signal (SRS) , CSI-RS, or a DM-RS.23.A wireless communications apparatus comprising a processor and a memory, wherein the processor is configured to read code from the memory and implement a method recited in any of claims 1 to 22.24.A computer program product comprising a computer-readable program medium code stored thereupon, the code, when executed by a processor, causing the processor to implement a method recited in any of claims 1 to 22.25.A wireless communication method, comprising:sending, by a wireless communication node to a wireless communication device, a first message, wherein the first message indicates port information associated with a reference signal; andreceiving, by the wireless communication node from the wireless communication device, the reference signal.