WO2017190659A1 - 配置探测参考信号的方法和装置 - Google Patents

配置探测参考信号的方法和装置 Download PDF

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Publication number
WO2017190659A1
WO2017190659A1 PCT/CN2017/082875 CN2017082875W WO2017190659A1 WO 2017190659 A1 WO2017190659 A1 WO 2017190659A1 CN 2017082875 W CN2017082875 W CN 2017082875W WO 2017190659 A1 WO2017190659 A1 WO 2017190659A1
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srs
subframe configuration
level
cell
base station
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PCT/CN2017/082875
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English (en)
French (fr)
Inventor
黄逸
武露
秦熠
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华为技术有限公司
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Priority to EP17792485.9A priority Critical patent/EP3444973B1/en
Publication of WO2017190659A1 publication Critical patent/WO2017190659A1/zh
Priority to US16/180,935 priority patent/US10819484B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/14—Two-way operation using the same type of signal, i.e. duplex
    • H04L5/1469—Two-way operation using the same type of signal, i.e. duplex using time-sharing
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • H04W64/006—Locating users or terminals or network equipment for network management purposes, e.g. mobility management with additional information processing, e.g. for direction or speed determination
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management

Definitions

  • Embodiments of the present invention relate to the field of communications, and in particular, to a method and apparatus for configuring a sounding reference signal.
  • Massive Multiple Input Multiple Output can further increase system capacity by utilizing more spatial freedom.
  • the accuracy of the downlink channel information becomes one of the important factors that restrict performance.
  • the base station can effectively obtain the downlink channel information required by the beamforming technology by utilizing the uplink and downlink channel reciprocity. Therefore, the Massive MIMO technology in the TDD system has a natural advantage.
  • Hybrid Beamforming is an effective method to reduce processing complexity and cost.
  • HBF technology is a two-stage beamforming technology (as shown in Figure 1): On the one hand, the base station uses the phase shifter to achieve the first-stage dynamic analog beamforming by changing the downtilt angle of the antenna, which can reduce the baseband processing by spatial dimensionality reduction. Complexity; on the other hand, the second-stage digital beamforming is implemented by baseband processing to achieve multi-user scheduling and inter-user interference suppression. The second-stage digital beamforming technology needs to obtain effective channel information.
  • the base station in the TDD system can accurately estimate the effective channel information according to the received Sounding Reference Signal (SRS).
  • SRS Sounding Reference Signal
  • the base station in order to achieve the first-level dynamic analog beamforming, the base station also needs to obtain complete channel information (such as long-term statistical characteristics of complete channel information, complete channel matrix, etc.).
  • complete channel information such as long-term statistical characteristics of complete channel information, complete channel matrix, etc.
  • the existing SRS configuration scheme is mainly designed for the acquisition of effective channel information, and does not well support the base station to obtain complete channel information.
  • the embodiment of the invention provides a method and a device for configuring an SRS, which can facilitate the base station to acquire complete channel information.
  • a first aspect provides a method for configuring an SRS, the method comprising: determining, by a base station, a moving speed of a user equipment UE; the base station determining, according to a moving speed of the UE, a plurality of UE-level SRS subframe configuration sets a UE-level subframe configuration set allocated by the UE, and determining a UE-level SRS subframe configuration parameter from the UE-level subframe configuration set allocated to the UE, where the SRS subframe configuration parameter is used to indicate And sending, by the base station, the UE-level SRS subframe configuration parameter and the identifier information of the UE-level subframe configuration set to the UE.
  • the density of the SRS transmitted by the UE can be adaptively adjusted according to the moving speed of the UE, thereby facilitating the base station to acquire the complete channel information. In addition, it is also possible to avoid waste of SRS resources.
  • the UE-level SRS subframe configuration parameter may be mapped to an SRS configuration period and an SRS subframe offset in the UE-level SRS subframe configuration set.
  • the SRS subframe configuration parameter is an SRS subframe configuration index in a UE-level SRS subframe configuration set.
  • the UE-level SRS subframe configuration set may be stored in the form of a table.
  • the UE-level SRS subframe configuration set may also be referred to as a UE-level SRS subframe configuration table.
  • the multiple UE-level SRS subframe configuration sets may correspond to different moving speeds.
  • the method further includes: the base station sends the quantity L 1 to the UE, where L 1 is a maximum number of symbols used for sending the SRS in one subframe. . This can prevent the UE from performing PUSCH transmission on symbols that other UEs may use to transmit SRS.
  • the L 1 symbols used to transmit the SRS in one subframe are distributed on the last L 1 symbols of the subframe.
  • the quantity L 1 is determined according to a ratio of a physical antenna number of the base station to an antenna port number.
  • the method further includes: sending, by the base station, indication information to the UE, where the indication information is used by And indicating that the UE sends L 2 SRSs after triggering the aperiodic SRS, or indicates that the UE sends L 2 SRSs in each period, where L 2 is greater than 1 and less than or A positive integer equal to L 1 .
  • the manner in which the L 2 SRSs are sent may be determined according to a base station according to a moving speed of the UE.
  • a plurality of manners of transmitting SRS corresponding to the moving speed of the UE may be pre-configured in the base station, so that the requirement of the SRS for obtaining complete channel information by the base station in different mobile scenarios may be satisfied.
  • the indication information is further used to instruct the UE transmits SRS L 2 th after triggering aperiodic SRS, or to instruct the UE to transmit SRS th L 2 in each cycle.
  • the base station can inform the UE of the number of SRSs transmitted after triggering the aperiodic SRS by the indication information, or the number of SRSs transmitted in each period.
  • the base station and the UE may also be pre-agreed number of SRS transmission period of each subframe and the maximum number of a symbol for transmitting the SRS is the same as L 1, or after a triggering aperiodic SRS.
  • the base station does not need to send the indication information to the UE to notify the UE of the number of SRSs transmitted after triggering the aperiodic SRS, or the number of SRSs transmitted in each period.
  • the method includes: sending, in the one subframe that is indicated by the UE-level SRS subframe configuration parameter L 2 SRS.
  • symbols for transmitting the L 2 SRSs are collectively distributed on the last L 2 symbols of the 1 subframe.
  • the manner includes multiple sub-frames starting from a subframe indicated by the UE-level SRS subframe configuration parameter
  • the L 2 SRSs are transmitted on the frame.
  • the sending is performed on multiple subframes starting with a subframe indicated by the UE-level SRS subframe configuration parameter
  • the L 2 SRSs include: transmitting Y SRSs on an nth subframe starting from a subframe indicated by the SRS subframe configuration parameter, until the L 2 SRSs are sent, where
  • N is a positive integer greater than or equal to 2 and less than or equal to L 2 .
  • symbols for transmitting the Y SRSs are collectively distributed on the last Y symbols of the nth subframe.
  • the method further includes: determining, by the base station, a moving speed of all UEs in the cell; Determining a used cell-level SRS subframe configuration set from a plurality of cell-level SRS subframe configuration sets according to a moving speed of all UEs in the cell, and determining a cell-level SRS from the determined cell-level SRS subframe configuration set.
  • a subframe configuration parameter where the cell-level SRS subframe configuration set corresponds to the multiple UE-level SRS subframe configuration sets, and the cell-level SRS subframe configuration parameter is used to indicate that the cell is used to send an SRS.
  • the base station sends the cell-level SRS subframe configuration parameter and the identifier information of the cell-level SRS subframe configuration set to the UE.
  • Each of the cell-level SRS subframe configuration sets includes multiple cell-level SRS subframe configuration parameters.
  • the cell-level SRS subframe configuration set may also be stored in the form of a table.
  • the cell-level SRS subframe configuration set may also be referred to as a cell-level SRS subframe configuration table.
  • the SRS resource of the cell can be adaptively adjusted according to the moving speed of all the UEs in the cell, so that the SRS resource required for the base station to obtain the complete channel information can be satisfied, and the waste of the SRS resource of the cell can be avoided.
  • the UE may determine, on which subframe sets, the UE may send the SRS, so that the SRS transmission between different UEs in the cell and the PUSCH transmission of the physical uplink shared channel can be avoided. conflict.
  • the base station may determine, according to the average moving speed of all UEs in the cell, the adopted cell-level SRS subframe configuration set from the multiple cell-level SRS subframe configuration sets.
  • the cell-level SRS subframe configuration parameter may be mapped to an SRS configuration period and an SRS subframe offset set in the cell-level SRS subframe configuration set.
  • the cell-level SRS subframe configuration parameter is an SRS subframe configuration index in a cell-level SRS subframe configuration set.
  • the multiple cell-level SRS subframe configuration sets may correspond to different speed value intervals.
  • the base station By configuring multiple cell-level SRS subframe configuration sets, it is more convenient for the base station to determine the cell-level SRS subframe configuration set to be used according to the moving speed of all UEs in the cell.
  • the base station may further determine, according to the moving speed of all UEs in the cell and the number of UEs in the cell, the adopted cell-level subframe configuration set from the multiple cell-level SRS subframe configuration sets.
  • the cell-level SRS subframe configuration set is determined according to the moving speed of all UEs in the cell and the number of UEs in the cell, which can further satisfy the requirement of the SRS resource of the cell and avoid the waste of the SRS resource. .
  • the base station and the UE may also configure only one cell-level SRS subframe configuration set.
  • the base station only needs to determine the adoption from the cell-level SRS subframe configuration set according to the moving speed of all UEs in the cell and the number of UEs. Cell level SRS subframe configuration parameters.
  • a second aspect provides a method for configuring an SRS, where the method includes: receiving, by a user equipment, a UE-level SRS subframe configuration parameter sent by a base station, and a UE-level subframe configuration set to which the UE-level SRS subframe configuration parameter belongs
  • the UE-level subframe configuration set is determined by the base station according to the moving speed of the UE from multiple UE-level subframe configuration sets; the UE is configured according to the UE-level SRS subframe configuration parameter and
  • the identifier of the UE-level subframe configuration set determines a subframe for transmitting the SRS.
  • the UE may also be configured with a plurality of UE-level subframe configuration sets in advance, and the UE-level subframe configuration set allocated by the base station to the UE may be determined according to the identifier of the UE-level subframe configuration set sent by the base station.
  • the method further includes: receiving, by the UE, the quantity L 1 sent by the base station, where L 1 is a maximum of a symbol for sending an SRS in one subframe The number, L 1 is a positive integer greater than one.
  • the L 1 symbols used to transmit the SRS in one subframe are distributed on the last L 1 symbols of the subframe.
  • the quantity L 1 is determined according to a ratio of a physical antenna number of the base station to an antenna port number.
  • the method further includes: the UE receiving the indication information sent by the base station, the indication information Means for indicating that the UE sends L 2 SRSs after triggering the aperiodic SRS, or for indicating that the UE sends L 2 SRSs in each period, where L 2 is greater than 1 And a positive integer less than or equal to L 1 , where L 1 is the maximum number of symbols used to transmit the SRS within one subframe.
  • the manner in which the L 2 SRSs are sent may be determined according to a base station according to a moving speed of the UE.
  • the indication information is further used to instruct the UE transmits SRS L 2 th after triggering aperiodic SRS, or to instruct the UE to transmit SRS th L 2 in each cycle.
  • the method includes: continuously transmitting the L on one subframe indicated by the SRS subframe configuration parameter 2 SRS.
  • the method includes: performing, by using, a plurality of subframes starting from a subframe indicated by the SRS subframe configuration parameter Sending the L 2 SRSs.
  • the sending, by using the multiple subframes that start with the subframe indicated by the SRS subframe configuration parameter, L 2 SRSs include: transmitting Y SRSs on the nth subframe starting from the subframe indicated by the SRS subframe configuration parameter, until the L 2 SRSs are sent, where
  • N is a positive integer greater than or equal to 2 and less than or equal to L 2 .
  • the method further includes: receiving, by the UE, a cell-level SRS subframe configuration sent by the base station And the identifier of the cell-level SRS subframe configuration set to which the cell-level SRS subframe configuration parameter belongs, where the cell-level SRS subframe configuration set is that the base station uses multiple cell-level SRSs according to the moving speed of all UEs in the cell. And determining, by the UE, the subframe set for transmitting the SRS in the cell according to the cell-level SRS subframe configuration parameter and the identifier information of the cell-level SRS subframe configuration set.
  • the receiving base station determines the identifier of the used cell-level SRS subframe configuration set and the cell-level SRS subframe configuration parameter according to the moving speed of all the UEs in the cell, and determines the subframe set used for transmitting the SRS in the cell according to the two, and can determine On which subframe sets, there may be UEs transmitting SRS, which can avoid transmitting the physical uplink shared channel PUSCH on subframes of other UEs in the cell that may be used to transmit SRS.
  • a base station is provided for performing the method of the first aspect or any one of the possible implementations of the first aspect.
  • the base station may comprise means for performing the method of the first aspect or any of the possible implementations of the first aspect.
  • a user equipment is provided for performing the method of any of the possible implementations of the second aspect or the second aspect.
  • the user equipment may comprise means for performing the method described in the second aspect or any of the possible implementations of the second aspect.
  • a base station including a processor, a transmitter, a memory, and a bus system, wherein the processor, the transmitter, and the memory are connected by the bus system, and the memory is configured to store an instruction,
  • the processor is configured to execute the instructions stored by the memory, and the performing of the instructions stored in the memory causes the base station to perform the method of any of the first aspect or the first aspect of the first aspect.
  • a user equipment including a processor, a receiver, a memory, and a bus system, the processor, the receiver, and the memory being connected by the bus system, the memory for storing instructions
  • the processor is configured to execute the instructions stored by the memory, and the performing of the instructions stored in the memory causes the user equipment to perform the method of any one of the possible implementations of the second aspect or the second aspect .
  • a computer readable storage medium storing one or more programs, the one or more programs comprising instructions that, when executed by a base station, cause the The base station performs the method of the first aspect or any one of the possible implementations of the first aspect.
  • a computer readable storage medium storing one or more programs, the one or more programs including instructions that, when executed by a user device, cause The user equipment performs the method of any of the possible implementations of the second aspect or the second aspect.
  • Figure 1 is a schematic block diagram of a hybrid beamforming scheme.
  • FIG. 2 is a schematic flowchart of a method for configuring an SRS according to an embodiment of the present invention
  • FIG. 3 is a schematic diagram of resource allocation of SRSs of different densities according to an embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a manner of transmitting an SRS according to an embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a base station according to another embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a user equipment according to another embodiment of the present invention.
  • WCDMA Wideband Code Division Multiple Access Wireless
  • HSPA High-Speed Packet Access
  • LTE Long Term Evolution
  • future networks such as 5G systems, and other communication systems that interconnect terminals wirelessly.
  • the base station in the embodiment of the present invention is an access entity in a wireless communication system, and may be a base station (Base Transceiver Station, BTS) in GSM or CDMA, or a base station (NodeB) in WCDMA, or may be in LTE.
  • BTS Base Transceiver Station
  • NodeB base station
  • the embodiment of the present invention is not limited to the evolved Node B (eNB or e-NodeB) and the base station in the future network 5G.
  • the user equipment may be, but not limited to, a mobile station (Mobile Station, MS), a mobile terminal (Mobile Terminal), a mobile phone (Mobile Telephone), a mobile phone (handset).
  • a Radio Access Network such as a computer, etc.
  • the user equipment can also be portable and pocket-sized. , handheld, computer built-in or in-vehicle mobile devices.
  • the SRS is divided into periodic SRS and aperiodic SRS.
  • the UE periodically transmits the SRS to the base station periodically according to the UE-level subframe configuration parameters until the SRS is disabled.
  • the base station is triggered by Downlink Control Information (DCI), and the DCI includes configuration information of the SRS.
  • DCI Downlink Control Information
  • the terminal configures the parameter according to the subframe configuration parameter only in the first subframe that satisfies the condition. Send an SRS on it.
  • the SRS subframe configuration includes a cell-specific SRS subframe configuration and a UE-specific SRS subframe configuration.
  • the UE-level SRS subframe is configured to configure the SRS resource of each UE, the cell-level SRS subframe is configured as the SRS resource configuration shared by all the users in the cell, and the UE-level SRS subframe is configured as the SRS resource configuration of the UE.
  • the cell-level SRS subframe configuration can be understood as an SRS resource pool, and the base station can allocate SRS resources for the UEs in the cell from the SRS resource pool.
  • the wireless uplink signal is in units of subframes, and the duration of each subframe is 1 millisecond (ms).
  • Each sub-frame is divided into 14 single carrier frequency division multiple access (SC-FDMA) symbols in the uplink direction.
  • SC-FDMA single carrier frequency division multiple access
  • the description is directly used herein. If the SRS is sent on a certain subframe, the SRS will occupy the last symbol of the subframe. If the last symbol of a subframe is assigned to an SRS, the symbol will not be used to transmit other upstream and upstream signals.
  • subframe used for transmitting the SRS described in the embodiment of the present invention refers to an uplink subframe or a special subframe.
  • Table 1 below shows the uplink and downlink subframe configuration in the TDD system.
  • D represents a downlink subframe
  • U represents an uplink subframe
  • S represents a special subframe (which can be used as an uplink subframe).
  • the special subframe includes three special time slots, namely, Downlink Pilot Time Slot (DwPTS), Guard Period (GP) and Uplink Pilot Time Slot (UpPTS), and DwPTS.
  • DwPTS Downlink Pilot Time Slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • DwPTS Downlink Pilot Time Slot
  • DwPTS Downlink Pilot Time Slot
  • GP Guard Period
  • UpPTS Uplink Pilot Time Slot
  • a cell-level SRS subframe configuration table is used as an example to describe a cell-level SRS subframe configuration set
  • a UE-level SRS subframe configuration table is taken as an example to describe a UE-level SRS subframe configuration set.
  • Table 2 shows the cell-level SRS subframe configuration table in the TDD system specified by the existing protocol, and various configurations are listed in Table 2.
  • the srs-SubframeConfig field that is sent by the base station to the UE is used to indicate the cell-level SRS subframe configuration parameter.
  • the transmission shift ⁇ SFC predetermined set of sub-frame number of the SRS can be transmitted.
  • Only the last symbol on the subframe specified by the srs-SubframeConfig field can be used to send the SRS.
  • the SRS configuration period is 5 ms
  • the transmission offset is ⁇ 1, 2 ⁇ .
  • the cell-level SRS resources are distributed in the subframe. 1 and subframe 2; in the period from subframe 0 to subframe 9 having a length of 10 ms, the cell-level SRS resources are distributed on subframe 1, subframe 2, subframe 6, and subframe 7.
  • Table 3 shows the UE-level periodic SRS subframe configuration table in the TDD system specified by the existing protocol
  • Table 4 shows the UE-level aperiodic SRS subframe configuration table in the TDD system specified by the existing protocol.
  • the srs-ConfigIndex field in the Information Element (IE) SoundingRS-UL-ConfigDedicated sent by the base station to the UE is used to indicate the UE-level periodic SRS configuration parameter
  • the signal SoundingRS-UL-ConfigDedicatedAperiodic-r10 The srs-ConfigIndexAp-r10 field is used to indicate UE level aperiodic SRS subframe configuration parameters.
  • the subframe in which the periodic SRS is transmitted satisfies:
  • n f is the system frame number
  • k SRS is shown in Table 5.
  • the first stage beamforming is designed according to a fixed antenna downtilt angle. Can't adjust.
  • the base station configures static beamforming on the SRS for channel estimation to obtain effective channel information.
  • the existing SRS scheme is mainly designed for the acquisition of effective channel information, and does not well support the requirement of HBF dynamic analog precoding to obtain the long-term statistical characteristics of complete channel information.
  • the long-term statistical characteristics of the complete channel information of the UE are unchanged for a period of time, and the UE can continuously transmit multiple sets of wideband SRSs in the channel coherence time, and the base station can configure different analog beamforming on different SRSs and obtain channel estimation. Group broadband effective channel information.
  • the base station can estimate the instantaneous full channel information of the broadband, and calculate the long-term statistical characteristics of the complete channel information. Therefore, in the embodiment of the present invention, the UE can continuously send multiple sets of SRSs in the channel coherence time, so that the base station can obtain complete channel information.
  • the density requirements of the base station for obtaining complete channel information for SRS are also different for UEs with different moving speeds. For example, when the UE moves at a small speed, the long-term statistical characteristics of the complete channel change slowly. The density of the SRS required for the base station to obtain the complete channel information is low. If the SRS density sent by the UE is large, the time domain resources will be caused. waste. When the moving speed of the UE is large, the long-term statistical characteristics of the complete channel change rapidly. The density of the SRS required for the base station to obtain the complete channel information is high. If the SRS density of the UE is small, the base station will not be able to obtain the complete channel information. .
  • the moving speed of the UE will affect the SRS resource requirement, and multiple UE-level subframe configurations may be pre-configured in the base station and the UE in order to meet different requirements of the SRS resources of the UE at different moving speeds. table.
  • the overall moving speed of all the UEs in the cell may also affect the size of the SRS resource pool of the cell, and may be pre-configured in the system in order to meet the different requirements of the SRS resources in different UE mobile scenarios in the cell.
  • Cell level SRS subframe configuration table may be pre-configured in the system in order to meet the different requirements of the SRS resources in different UE mobile scenarios in the cell.
  • the number of UEs in a cell also affects the demand for SRS resources.
  • pre-configuring a plurality of cell-level SRS subframe configuration tables it is possible to flexibly adjust the cell SRS resource configuration when the number of UEs in the cell changes, thereby avoiding waste of SRS resources. For example, when the number of UEs in a cell increases, the SRS density of the cell-level configuration is increased to improve channel estimation accuracy; when the number of UEs in the cell decreases, the SRS density of the cell-level configuration is reduced to avoid waste of SRS resources.
  • the multiple cell-level SRS subframe configuration table may include a cell-level SRS subframe configuration table specified by the existing protocol, as shown in Table 2, and other pre-configured cell-level SRS subframe configuration tables, such as a table. 6 is shown. It should be noted that embodiments of the present invention are not limited to the examples of other cell-level SRS subframe configuration tables shown in Table 6.
  • a new cell-level SRS subframe configuration parameter field (for example, srs-SubframeConfig-BF field) may be predefined to indicate SRS subframe configuration parameters in other cell-level SRS subframe configuration tables.
  • multiple cell-level SRS subframe configuration tables may correspond to scenarios of different SRS density requirements, respectively.
  • each cell-level SRS subframe configuration table may include multiple cell-level SRS subframe configuration parameters, so that an appropriate cell-level SRS may be selected according to the average speed of all UEs in the cell and the number of UEs in the cell. Subframe configuration parameters.
  • embodiments of the present invention may also be transmitted in L 1 L 1 th SRS symbol for transmitting the SRS in the uplink subframe, L 1 is a positive integer greater than 1. This not only increases the resources for transmitting the SRS, but also further increases the adjustment range of the transmitted SRS density.
  • L 1 may also be transmitted continuously on SRS L 1 th consecutive symbols uplink subframe.
  • the density of the SRSs transmitted by the UE can be further increased, which can facilitate the base station to obtain the complete channel information and the SRS in the high-speed mobile scenario of the UE.
  • the number L 1 of symbols for transmitting the SRS on one uplink subframe may be determined by the base station, and then the number L 1 is transmitted to the UE.
  • a set may be pre-configured in the base station, and the base station may select L 1 from the set and send it to the UE.
  • the set of L 1 is ⁇ 2, 4, 8 ⁇ .
  • an algorithm may be pre-configured in the base station, and the base station may calculate L 1 according to the pre-configured algorithm. For example, if L 1 is defined as the ratio of the number of physical antennas of the base station to the number of antenna ports, the base station can calculate L 1 according to the ratio of the number of physical antennas to the number of antenna ports.
  • the base station and the UE may also pre-agreed the quantity L 1 , and the base station may not send the quantity L 1 to the UE.
  • the base station and the UE may also pre-arrange the location of the L 1 symbols used to transmit the SRS on one uplink subframe. For example, the L 1 symbols used to transmit the SRS are concentrated on the last L 1 symbols of the uplink subframe.
  • the value of L 1 may also be included in the cell-level SRS subframe configuration table that is pre-configured in the base station, as shown in Table 7.
  • Frame configuration parameter field can srs-SubframeConfig added bit information is used to indicate L 1
  • the frame configuration may also be a new parameter field in a predefined cell-level SRS subframe (e.g. srs-SubframeConfig- existing protocols in a predetermined cell-level SRS subframe BF field) indicating cell-level SRS subframe configuration table shown in table 7 include SRS periodicity, offset, and transmitting a sub-frame L SRS configuration parameters.
  • the embodiment of the present invention does not limit this, and the base station may also send the indication information of L 1 to the UE in other manners.
  • the multiple UE-level SRS subframe configuration table may include a periodic or non-periodic UE-level SRS subframe configuration table specified by the existing protocol, as shown in Table 3 and Table 4, and other pre-configured configurations.
  • UE level SRS subframe configuration table may include a periodic or non-periodic UE-level SRS subframe configuration table specified by the existing protocol, as shown in Table 3 and Table 4, and other pre-configured configurations.
  • UE level SRS subframe configuration table may include a periodic or non-periodic UE-level SRS subframe configuration table specified by the existing protocol, as shown in Table 3 and Table 4, and other pre-configured configurations.
  • UE level SRS subframe configuration table may include a periodic or non-periodic UE-level SRS subframe configuration table specified by the existing protocol, as shown in Table 3 and Table 4, and other pre-configured configurations.
  • each cell-level SRS subframe configuration table corresponds to at least one UE-level SRS subframe configuration table.
  • a new UE-level SRS subframe configuration parameter field (eg, srs-ConfigIndex-Prebf field) may be predefined to represent SRS subframe configuration parameters in other periodic UE-level SRS subframe configuration tables.
  • a new aperiodic UE-level SRS subframe configuration parameter field (for example, srs-ConfigIndexAp-Prebf field) may be predefined to indicate SRS subframe configuration in other UE-level aperiodic SRS subframe configuration tables. parameter.
  • the cell-level SRS subframe configuration table and the UE-level SRS subframe configuration table in the embodiment of the present invention are described above.
  • the method for configuring the SRS in the embodiment of the present invention is described below with reference to FIG.
  • FIG. 2 is a schematic flow chart of a method 200 of configuring an SRS according to an embodiment of the present invention.
  • the base station determines a moving speed of the UE.
  • the base station may determine the moving speed of the UE according to the location information reported by the UE.
  • the base station determines, according to the moving speed of the UE, a UE-level SRS subframe configuration table from the multiple UE-level SRS subframe configuration tables corresponding to the adopted cell-level SRS subframe configuration table, and determines the UE-level subframe from the determined UE-level subframe.
  • the UE-level SRS subframe configuration parameter is determined in the configuration table, and the UE-level SRS subframe configuration parameter is used to indicate a subframe for transmitting the SRS.
  • Multiple UE level SRS subframe configurations may correspond to different speed intervals.
  • the first UE-level SRS subframe configuration table in the multiple UE-level SRS subframe configuration tables corresponds to the speed interval [v 1 , v 2 ]
  • the second UE-level SRS subframe configuration table and the speed interval [v 3 , v 4 ] Correspondence, and so on, no longer repeat them.
  • the UE-level SRS subframe configuration parameter may be a periodic SRS subframe configuration parameter or an aperiodic SRS subframe configuration parameter.
  • the base station sends, to the UE, a UE-level SRS subframe configuration parameter and identifier information of the UE-level subframe configuration table.
  • the identifier information of the UE-level SRS subframe configuration parameter and the UE-level subframe configuration table may be carried in the same configuration field.
  • the step 203 includes: the base station sends a message to the UE, where the field of the message carries the UE-level SRS subframe configuration parameter and the identifier information of the UE-level SRS subframe configuration table.
  • bit information of a specific length may be added in a UE-level SRS subframe configuration field specified by an existing protocol for identifying the UE-level SRS subframe configuration table.
  • the identifier information of the UE-level SRS subframe configuration parameter and the UE-level SRS subframe configuration table may be carried in the srs-ConfigIndex field; for the aperiodic SRS, the UE-level SRS subframe configuration parameter and the UE-level SRS sub-
  • the identification information of the frame configuration table is carried in the srs-ConfigIndexAp-r10 field.
  • a new UE-level SRS subframe configuration field such as srs-ConfigIndex-Prebf or srs-ConfigIndexAp-Prebf, may also be defined.
  • the identifier information of the UE-level SRS subframe configuration parameter and the UE-level SRS subframe configuration table may be carried in the srs-ConfigIndex-Prebf field; for the aperiodic SRS, the UE-level SRS subframe configuration parameter and the UE level
  • the identification information of the SRS subframe configuration table is carried in the srs-ConfigIndexAp-Prebf field.
  • identification information of the UE-level SRS subframe configuration parameter and the UE-level subframe configuration table may also be carried in different configuration fields. This embodiment of the present invention does not limit this.
  • the UE-level SRS subframe configuration parameter may carry the srs-ConfigIndex field or srs sent by the base station to the UE.
  • the identification information of the UE-level SRS subframe configuration table may not be sent by default, or may be sent to the UE through other fields or cells.
  • the base station may determine a UE-level SRS subframe configuration table and a UE-level SRS subframe configuration parameter allocated to the UE according to the moving speed of the UE.
  • the SRS time domain resources of different densities can be allocated to the UEs of different mobile speeds, so that the requirements of the SRS for obtaining the complete channel information by the base station can be satisfied, thereby facilitating the base station to obtain complete channel information and avoiding waste of time domain resources.
  • FIG. 3 is a schematic diagram showing the resource configuration of SRSs of different densities.
  • a low-density SRS may be used to acquire a valid channel, or may also be used for a UE whose mobile speed is lower than a preset threshold to acquire complete channel information
  • a high-density SRS may be used for UE acquisition with a moving speed higher than a preset threshold. Full channel information.
  • the base station may determine one or more UE-level SRS subframe configuration parameters from the UE-level subframe configuration table, and correspondingly, in step 203, the base station may send the determined one or more UEs to the UE.
  • Level SRS subframe configuration parameters In this case, the UE may select, from the received one or more UE-level SRS subframe configuration parameters, a subframe indicated by at least one of the SRS subframe configuration parameters to send the SRS.
  • the UE determines, according to the received UE-level SRS subframe configuration parameter and the identifier information of the UE-level SRS subframe configuration table, a subframe used for sending the SRS.
  • the UE finds the UE-level SRS subframe configuration table allocated by the base station from multiple pre-configured multiple UE-level SRS subframe configuration tables according to the identifier information of the UE-level SRS subframe configuration table, and configures the UE-level SRS subframe according to the UE-level SRS subframe configuration.
  • the parameter determines a subframe for transmitting the SRS from the UE-level SRS subframe configuration table.
  • the UE-level SRS subframe configuration parameter is a periodic SRS subframe configuration parameter
  • the UE may periodically send the SRS on the specified subframe for transmitting the SRS.
  • the UE-level SRS subframe configuration parameter is an aperiodic SRS subframe configuration parameter
  • the UE after receiving the trigger information sent by the base station, the UE sends the SRS on the specified subframe for transmitting the SRS.
  • method 200 can also include:
  • the base station determines the moving speed of all UEs in the cell.
  • step 201 may not be performed at this time.
  • the base station determines, according to the moving speed of all the UEs in the cell, the adopted cell-level SRS subframe configuration table from the multiple cell-level SRS subframe configuration table, and determines the cell-level SRS from the determined cell-level SRS subframe configuration table.
  • the subframe configuration parameter, the cell-level SRS subframe configuration parameter is used to indicate a subframe set for transmitting the SRS in the cell.
  • the currently adopted cell level SRS subframe configuration table may be determined through step 202', and is performed before step 202.
  • the base station may determine, according to the average moving speed of all the UEs in the cell, the adopted cell-level SRS subframe configuration table from the multiple cell-level SRS subframe configuration table.
  • the base station sends the cell-level SRS subframe configuration parameter and the identifier information of the adopted cell-level SRS subframe configuration set to the UE.
  • the cell-level SRS subframe configuration parameter and the identifier information of the cell-level SRS subframe configuration table may be carried in the same configuration field.
  • the step 203' includes: the base station sends a message to the UE, where the field of the message carries the cell-level SRS subframe configuration parameter and the identifier information of the cell-level SRS subframe configuration table.
  • the identification information of a specific length may be added to the cell-level SRS subframe configuration field specified by the existing protocol to indicate the cell-level SRS subframe configuration table.
  • the cell-level SRS subframe configuration parameter and the identifier information of the cell-level SRS subframe configuration table may be carried in the srs-SubframeConfig field.
  • a new cell SRS subframe configuration field such as srs-SubframeConfig-BF
  • srs-SubframeConfig-BF can also be defined.
  • the identifier information of the cell-level SRS subframe configuration parameter and the cell-level SRS subframe configuration table may be carried in the srs-SubframeConfig-BF field.
  • the srs-SubframeConfig or srs-SubframeConfig-BF can be sent to the UE through the System Information Block (SIB) 2.
  • SIB System Information Block
  • cell level SRS subframe configuration parameter and the identity information of the cell level SRS subframe configuration table may also be carried in different configuration fields. This embodiment of the present invention does not limit this.
  • the cell-level SRS subframe configuration parameter is carried in the base station to the UE, as in the prior art.
  • the identifier information of the cell-level SRS subframe configuration table may not be sent by default, or sent to the UE through other fields or cells.
  • steps 203 and 203' may be performed at the same time or may be performed at different times, which is not limited by the embodiment of the present invention.
  • the base station may simultaneously send the cell-level SRS configuration information and the UE-level SRS configuration information to the UE, or may only send the UE-level SRS configuration information to the UE. For example, when the base station configures the SRS resource for the UE again after the base station sends the cell-level SRS configuration information to the UE, the base station may only send the UE-level SRS configuration information to the UE.
  • the UE determines, according to the cell-level SRS subframe configuration parameter sent by the base station and the identifier information of the adopted cell-level SRS subframe configuration set, the subframe set used for transmitting the SRS in the cell.
  • PUSCH Physical Uplink Shared Channel
  • the method 200 may further include: the base station sends the quantity L 1 to the UE, where L 1 is the maximum number of symbols used to transmit the SRS in one subframe, and L 1 is a positive integer greater than 1.
  • the indication information of L 1 may be added to the existing cell-level SRS subframe configuration parameter field srs-SubframeConfig. It is also possible to add the indication information of L 1 in the existing UE-level SRS subframe configuration parameter fields srs-ConfigIndex and srs-ConfigIndexAp-r10.
  • the embodiment of the present invention is not limited thereto, and a new cell-level SRS subframe configuration parameter field (for example, srs-SubframeConfig-BF field) or a UE-level SRS subframe configuration parameter field (for example, srs-ConfigIndex-Prebf field) may be defined.
  • the indication information of L 1 is carried in the cell-level SRS subframe configuration parameter field or the UE-level SRS subframe configuration parameter field.
  • the location of the symbol for transmitting the SRS in one subframe may be pre-configured in the base station and the UE, or may be pre-agreed by the base station and the UE.
  • the positions of the L 1 symbols used to transmit the SRS in one subframe may be collectively distributed on the last L 1 symbols of the subframe.
  • the number of the received UE L 1 in the cell can be prevented in the other UE may be used for transmission on PUSCH symbol of the subframe for transmitting the SRS.
  • the method 200 may further include: the base station sending the indication information to the UE.
  • the indication information is used to indicate that the UE sends L 2 SRSs after triggering the aperiodic SRS; for the periodic SRS, the indication information may be used to indicate that the UE sends the L in each period. 2 SRSs, where L 2 is a positive integer greater than 1 and less than or equal to L 1 .
  • the UE according to the indication information received may send an aperiodic SRS L 2 th after receiving the trigger aperiodic SRS or SRS transmission periodicity L 2 in each period.
  • the indication information sent by the base station is further used to indicate a manner in which the L 2 SRSs are sent.
  • the UE transmits L 2 SRSs according to the indication indicated by the indication information.
  • the base station can indicate the number of SRSs that the UE transmits after triggering the aperiodic SRS or the number of SRSs that the UE transmits in each cycle.
  • the base station and the UE may also pre-determine the number of SRSs that the UE transmits after triggering the aperiodic SRS or the number L 2 of the SRS that the UE transmits in each cycle, for example, the number L 2 is equal to L 1 .
  • the base station only needs to send indication information to the UE, which is used to indicate the manner in which the SRS is transmitted. That is, method 200 may further comprise: sending indication information to the UE, the indication information indicates the UE transmits SRS L 2 th embodiment employed after triggering aperiodic SRS, or to instruct the UE to transmit in each period L 2 ways of SRS adoption.
  • the manner in which the L 2 SRSs are sent may be determined by the base station according to the moving speed of the UE.
  • the base station may instruct the UE to transmit L 2 SRSs in a plurality of different manners according to the moving speed of the UE.
  • the correspondence between the moving speed of the UE and the manner of transmitting the SRS may be pre-configured in the base station.
  • the method includes transmitting L 2 SRSs on one subframe indicated by the UE-level SRS subframe configuration parameter.
  • L 2 SRSs may be continuously transmitted on the last L 2 symbols of the subframe.
  • the length of the UpPTS is 1 or 2 symbols. Therefore, a special subframe can only be used to continuously transmit 2 SRSs. Therefore, in this scenario, the UE-level SRS subframe configuration table can be used.
  • the uplink subframe is configured to transmit the SRS, which can further improve the density of the SRS transmitted by the UE, and is applicable to a scenario in which the UE moves at a high speed.
  • the subframe offsets are 1, 6 corresponding to the special subframes, and the configuration of the SRS subframe offsets of 1, 6 is not included in the UE-level SRS subframe configuration table shown in Table 8 and Table 16, Therefore, if Table 8 and Table 16 are used for the SRS configuration in the scenario, the UE may send more than 2 SRSs in one uplink subframe, which will facilitate the base station in the UE. Obtain complete channel information in a high-speed moving scene.
  • Table 8 can be used for subframe configuration of periodic SRS
  • Table 16 can be used for subframe configuration of aperiodic SRS. It should be understood that the embodiments of the present invention are described by way of example only, and are not limited thereto.
  • the method includes transmitting L 2 SRSs on multiple subframes starting from a subframe indicated by the UE-level SRS subframe configuration parameter.
  • Table 9 can be used for subframe configuration of periodic SRS
  • Table 3 can be used for subframe configuration of aperiodic SRS.
  • a n-th stage from the UE in a subframe SRS subframe configuration parameter indicating the start of Transmitting Y SRSs on the frame until the L 2 SRSs are sent comprising: a n-th stage from the UE in a subframe SRS subframe configuration parameter indicating the start of Transmitting Y SRSs on the frame until the L 2 SRSs are sent, wherein
  • N is a positive integer greater than or equal to 2 and less than or equal to L 2
  • the normal subframe refers to the uplink subframe shown in Table 1. Indicates rounding up.
  • the value of N is related to the moving speed of the UE. The faster the moving speed of the UE, the smaller the value of N.
  • L 2 SRSs may be indicated by information having a length of 2 bits, as shown in Table 17. It should be understood that, according to the combination of the values of N and L 2 , other length information may also be used to indicate the manner in which L 2 SRSs are transmitted.
  • the base station may instruct the UE to transmit four consecutive SRS in a subframe satisfying the condition; when the mobile UE When the speed V 2 ⁇ V ⁇ V 1 , the base station may instruct the UE to continuously transmit 2 SRSs in each of the two subframes that satisfy the condition; when the moving speed of the UE is V ⁇ V 2 , the base station may indicate that the UE is satisfied.
  • One SRS is transmitted on each of the four sub-frames of the condition.
  • the moving speed V of the UE is a critical value of the moving speed corresponding to the two sending modes
  • the base station may instruct the UE to send the SRS by using any one of the two sending modes.
  • the base station may indicate that the UE is in the Two SRSs are continuously transmitted on each of the two subframes satisfying the condition, or the UE is instructed to transmit one SRS on each of the four subframes satisfying the condition.
  • FIG. 5 is a schematic structural diagram of a base station 500 according to an embodiment of the present invention.
  • Base station 500 is used to implement the method performed by the base station in method 200 of FIG.
  • the base station 500 can include a determining unit 510 and a transmitting unit 520.
  • the determining unit 510 is configured to: determine a moving speed of the user equipment UE; and determine, according to the moving speed of the UE, a UE-level subframe configuration set from the multiple UE-level SRS subframe configuration sets corresponding to the adopted cell-level SRS subframe configuration set. Determining a UE-level SRS subframe configuration parameter from the determined UE-level subframe configuration set, where the UE-level SRS subframe configuration parameter is used to indicate a subframe for transmitting the SRS.
  • the sending unit 520 is configured to send, to the UE, the UE-level SRS subframe configuration parameter determined by the determining unit and the identifier information of the UE-level subframe configuration set.
  • the density of the SRS transmitted by the UE can be adaptively adjusted according to the moving speed of the UE, thereby facilitating the base station to acquire the complete channel information.
  • the UE 500 may further include a receiving unit, configured to receive the SRS sent by the UE, and other uplink signals.
  • a receiving unit configured to receive the SRS sent by the UE, and other uplink signals.
  • the determining unit 510 is further configured to: determine a moving speed of all UEs in the cell; determine, according to a moving speed of all UEs in the cell, a adopted cell-level SRS subframe configuration set from the multiple cell-level SRS subframe configuration set, And determining a cell-level SRS subframe configuration parameter from the cell-level SRS subframe configuration set, where the cell-level SRS subframe configuration parameter is used to indicate a subframe set used for transmitting the SRS in the cell.
  • the sending unit 520 is further configured to send, to the UE, a cell level SRS subframe configuration parameter determined by the determining unit and an identifier of the cell level SRS subframe configuration set.
  • the sending unit 520 is further configured to send the quantity L 1 to the UE, where L 1 is a maximum number of symbols used for transmitting the SRS in one subframe, and L 1 is a positive integer greater than 1.
  • the sending unit 520 is further configured to, send indication information to the UE, the UE transmits indication information indicates L 2 th after triggering aperiodic SRS SRS, or to instruct the UE to transmit in each L 2 th cycle SRS.
  • the indication information is further used to indicate a manner in which the L 2 SRSs are transmitted, where L 2 is a positive integer greater than 1 and less than or equal to L 1 .
  • the sending unit 520 is further configured to send, to the UE, indication information, where the indication information is used to indicate a manner in which the UE sends the L 2 SRSs after triggering the aperiodic SRS, or is used to indicate that the UE is in each period.
  • the method includes transmitting L 2 SRSs on one subframe indicated by the UE-level SRS subframe configuration parameter.
  • the method includes transmitting L 2 SRSs on a plurality of subframes starting from a subframe indicated by the UE-level SRS subframe configuration parameter.
  • the UE-level SRS subframe configuration parameter plurality of subframes indicated by the two L 2 starts SRS transmission comprising: a transmission of Y in the n th sub-frame from the SRS subframe configuration parameter indicating the start of SRS, until L 2 SRSs are sent, of which
  • N is a positive integer greater than or equal to 2 and less than or equal to L 2 .
  • base station 600 can include a processor 610, a transmitter 620, a memory 630, and a bus system 640.
  • Processor 610, transmitter 620, and memory 630 are coupled by a bus system 640.
  • the memory 630 can be used to store code and the like executed by the processor 610.
  • the bus system 640 includes a power bus, a control bus, and a status signal bus in addition to the data bus.
  • the base station 600 may further include a receiver, configured to receive the SRS sent by the UE, and other uplink signals.
  • the base station 500 shown in FIG. 5 and the base station 600 shown in FIG. 6 can implement various processes implemented by the base station in the foregoing method embodiments. To avoid repetition, details are not described herein again.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the processor may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programming logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory.
  • the volatile memory can be a Random Access Memory (RAM) that acts as an external cache.
  • RAM Random Access Memory
  • many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM).
  • SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • DDR SDRAM Double Data Rate Synchronous Dynamic Random Access Memory
  • ESDRAM Enhanced Synchronous Dynamic Random Access Memory
  • Synchronous Connection Dynamic Random Access memory Synchronous Connection Dynamic Random Access memory
  • SLDRAM Synchronous Connection Dynamic Random Access memory
  • DR RAM direct memory bus random access memory
  • FIG. 7 is a schematic structural diagram of a UE 700 according to an embodiment of the present invention. As shown in FIG. 7, the UE 700 includes a receiving unit 710 and a determining unit 720.
  • the receiving unit 710 is configured to receive, by the base station, a UE-level SRS subframe configuration parameter and an identifier of a UE-level subframe configuration set to which the UE-level SRS subframe configuration parameter belongs, where the UE-level subframe configuration set is a base station according to a moving speed of the UE. Determined by using a plurality of UE-level subframe configuration sets corresponding to the adopted cell-level SRS subframe configuration set;
  • the determining unit 720 is configured to determine, according to the UE-level SRS subframe configuration parameter received by the receiving unit and the identifier of the UE-level subframe configuration set, the subframe used for sending the SRS.
  • the UE 700 may further include a sending unit for transmitting the SRS, and other uplink signals.
  • the receiving unit 710 is further configured to: receive a cell-level SRS subframe configuration parameter sent by the base station, and an identifier of a cell-level SRS subframe configuration set to which the cell-level SRS subframe configuration parameter belongs, where the cell-level SRS subframe configuration set is The base station determines from the plurality of cell-level SRS subframe configuration sets according to the moving speed of all UEs in the cell.
  • the determining unit 720 is further configured to determine, according to the cell-level SRS subframe configuration parameter and the identifier of the cell-level SRS subframe configuration set received by the receiving unit, a subframe set for transmitting the SRS in the cell.
  • the receiving base station determines the identifier of the used cell-level SRS subframe configuration set and the cell-level SRS subframe configuration parameter according to the moving speed of all the UEs in the cell, and determines the subframe set used for transmitting the SRS in the cell according to the two, and can determine On which subframe sets, there may be UEs transmitting SRS, which can avoid transmitting the physical uplink shared channel PUSCH on subframes of other UEs in the cell that may be used to transmit SRS.
  • the receiving unit 710 is further configured to receive, by the base station, the quantity L 1 , where L 1 is a maximum number of symbols used for transmitting the SRS in one subframe, and L 1 is a positive integer greater than 1.
  • the receiving unit 710 is further configured to indication information received by the base station, the UE transmits indication information indicates L 2 th after triggering aperiodic SRS SRS; or indication information indicates UE within each cycle L 2 SRSs are transmitted, where L 2 is a positive integer greater than 1 and less than or equal to L 1 .
  • the indication information is further used to indicate a manner in which the L 2 SRSs are sent.
  • the method includes: transmitting L 2 SRSs on one subframe indicated by the UE-level SRS subframe configuration parameter; or, the manner includes multiple subframes starting from a subframe indicated by the UE-level SRS subframe configuration parameter. Send L 2 SRSs on.
  • L 2 th SRS transmission includes a plurality of subframes
  • the UE-level SRS subframe configuration parameter indicating the start the transmission on n th frame from the UE in a subframe-level SRS subframe configuration parameter indicating the start of Y SRS, until L 2 SRSs are sent, of which
  • N is a positive integer greater than or equal to 2 and less than or equal to L 2 .
  • the receiving unit 710 in the embodiment of the present invention may be implemented by a receiver, and the determining unit 720 may be implemented by a processor.
  • the UE 800 can include a processor 810, a receiver 820, a memory 830, and a bus system 840.
  • the processor 810, the receiver 820, and the memory 830 are coupled by a bus system 840.
  • the memory 830 can be used to store code and the like executed by the processor 810.
  • bus system 840 includes a power bus, a control bus, and a status signal bus.
  • the UE 800 may also include a transmitter for transmitting the SRS, as well as other uplink signals.
  • the UE 700 shown in FIG. 7 and the UE 800 shown in FIG. 8 can implement various processes implemented by the UE in the foregoing method embodiments. To avoid repetition, details are not described herein again.
  • the above method embodiments of the present application may be applied to a processor or implemented by a processor.
  • the processor may be an integrated circuit chip with signal processing capabilities.
  • each step of the foregoing method embodiment may be completed by an integrated logic circuit of hardware in a processor or an instruction in a form of software.
  • the above described processor may be a general purpose processor, DSP, ASIC, FPGA or other programmable logic device, discrete gate or transistor logic device, discrete hardware component.
  • the methods, steps, and logical block diagrams disclosed in the embodiments of the present invention may be implemented or carried out.
  • the general purpose processor may be a microprocessor or the processor or any conventional processor or the like.
  • the steps of the method disclosed in the embodiments of the present invention may be directly implemented as a hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor.
  • the software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like.
  • the storage medium is located in the memory, and the processor reads the information in the memory and combines the hardware to complete the steps of the above method.
  • the memory in the embodiments of the present invention may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory.
  • the non-volatile memory may be a ROM, a PROM, an EPROM, an EEPROM, or a flash memory.
  • the volatile memory can be RAM, which acts as an external cache.
  • many forms of RAM are available, such as SRAM, DRAM, SDRAM, DDR SDRAM, ESDRAM, SLDRAM, and DR RAM. It should be noted that the memories of the systems and methods described herein are intended to comprise, without being limited to, these and any other suitable types of memory.
  • the disclosed systems, devices, and methods may be implemented in other manners.
  • the device embodiments described above are merely illustrative, for example, unitary Partitioning is only a logical function partitioning. In actual implementation, there may be another way of dividing. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.
  • the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

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Abstract

本发明实施例提供了一种配置探测参考信号的方法和装置。该方法包括：基站确定用户设备UE的移动速度；基站根据UE的移动速度，从采用的小区级SRS子帧配置集合对应的多个UE级SRS子帧配置集合中确定一个UE级子帧配置集合，并从确定的UE级子帧配置集合中确定UE级SRS子帧配置参数，UE级SRS子帧配置参数用于指示用于发送SRS的子帧；基站向UE发送UE级SRS子帧配置参数和UE级子帧配置集合的标识信息。通过根据UE的移动速度确定为UE分配的UE级SRS子帧配置集合和UE级SRS子帧配置参数，使得能够根据UE的移动速度自适应调整UE发送SRS的密度，从而能够有利于基站获取完整信道信息。

Description

配置探测参考信号的方法和装置
本申请要求于2016年05月05日提交中国专利局、申请号为201610293651.3、发明名称为“配置探测参考信号的方法和装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明实施例涉及通信领域，尤其涉及配置探测参考信号的方法和装置。
背景技术
作为5G关键技术之一，大规模天线(Massive Multiple Input Multiple Output，Massive MIMO)能够通过利用更多的空间自由度进一步提高系统容量。基站配置大规模发射天线后，下行信道信息的准确性成为制约性能的重要因素之一。在时分双工(Time Division Duplexing，TDD)系统中，基站能够利用上下行信道互易性有效地获取波束成形技术所需要的下行信道信息，因此TDD系统中采用Massive MIMO技术具有天然的优势。
基站如果采用传统的数字波束成形技术，就需要为每根发射天线配置一条射频链路。在TDD Massive MIMO系统中，这会使得基站成本较高并且基带处理复杂度增加。采用混合波束成形(Hybrid Beamforming，HBF)是一种能够降低处理复杂度和成本的有效方法。HBF技术是一种两级波束成形技术(如图1所示)：一方面，基站利用移相器通过改变天线的下倾角实现第一级动态的模拟波束成形，能够通过空间降维降低基带处理复杂度；另一方面，第二级数字波束成形通过基带处理实现，从而达到多用户调度和用户间干扰抑制的目的。第二级数字波束成形技术需要获取有效信道信息，TDD系统中基站根据接收到的信道探测参考信号(Sounding Reference Signal,SRS)能够较为准确地估计有效信道信息。同时，为实现第一级动态的模拟波束成形，基站还需获取完整信道信息(如完整信道信息的长期统计特性，完整信道矩阵等)。而现有的SRS配置方案主要是针对有效信道信息的获取进行设计的，不能很好地支持基站获取完整信道信息。
发明内容
本发明实施例提出了一种配置SRS的方法和装置，能够有利于基站获取完整信道信息。
第一方面，提供了一种配置SRS的方法，所述方法包括：基站确定用户设备UE的移动速度；所述基站根据所述UE的移动速度从多个UE级SRS子帧配置集合中确定为所述UE分配的UE级子帧配置集合，并从为所述UE分配的所述UE级子帧配置集合中确定UE级SRS子帧配置参数，所述SRS子帧配置参数用于指示用于发送SRS的子帧；所述基站向所述UE发送所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识信息。
通过根据UE的移动速度从多个UE级SRS子帧配置集合中确定为UE分配的UE级SRS子帧配置集合，并从该UE级SRS子帧配置集合中确定UE级SRS子帧配置参数，使得能够根据UE的移动速度自适应调整UE发送SRS的密度，从而能够有利于基站获取完整信道信息。另外，还能够避免SRS资源的浪费。
所述UE级SRS子帧配置参数可映射为所述UE级SRS子帧配置集合中的SRS配置周期和SRS子帧偏移。例如，所述SRS子帧配置参数为UE级SRS子帧配置集合中的SRS子帧配置索引。
所述UE级SRS子帧配置集合可以表的形式存储，此时，所述UE级SRS子帧配置集合也可以称为UE级SRS子帧配置表。
可选地，所述多个UE级SRS子帧配置集合可以与不同的移动速度相对应。
结合第一方面，在第一方面的第一种可能的实现方式中，还包括：所述基站向所述UE发送数量L1，L1为一个子帧内用于发送SRS的符号的最大数量。这样能够避免UE在其他UE可能用于发送SRS的符号上进行PUSCH传输
可选地，一个子帧内用于发送SRS的L1个符号集中分布在所述子帧的最后L1个符号上。
可选地，所述数量L1是根据所述基站的物理天线数和天线端口数的比值确定的。
结合第一方面或第一方面的第一种可能的实现方式，在第一方面的第二种可能的实现方式中，还包括：所述基站向所述UE发送指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式，L2为大于1且小于或等于L1的正整数。
可选地，发送所述L2个SRS采用的方式可以是根据基站根据UE的移动速度确定的。
基站中可以预先配置多种与UE的移动速度相对应的发送SRS的方式，从而能够满足基站在不同移动场景下为获取完整信道信息对SRS的需求。
可选地，所述指示信息还用于指示所述UE在触发非周期性SRS之后发送L2个SRS，或者用于指示所述UE在每个周期内发送L2个SRS。
换句话说，基站可以通过指示信息通知UE在触发非周期性SRS之后发送SRS的数量，或者每个周期内发送SRS的数量。
可选地，基站还可以和UE预先约定触发非周期性SRS之后或者每个周期内发送SRS的数量与一个子帧内用于发送SRS的符号的最大数量L1相同。此时基站无需向UE发送指示信息通知UE在触发非周期性SRS之后发送SRS的数量，或者每个周期内发送SRS的数量。
结合第一方面的第二种可能的实现方式，在第一方面的第三种可能的实现方式中，所述方式包括在所述UE级SRS子帧配置参数指示的1个子帧上发送所述L2个SRS。
可选地，用于发送所述L2个SRS的符号集中分布在所述1个子帧的最后L2个符号上。
结合第一方面的第二种可能的实现方式，在第一方面的第四种可能的实现方式中，所述方式包括在从所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
结合第一方面的第四种可能的实现方式，在第一方面的第五种可能的实现方式中，所述在所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：在从所述SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至在发送完所述L2个SRS，其中，
Figure PCTCN2017082875-appb-000001
Figure PCTCN2017082875-appb-000002
N为大于或等于2且小于或等于L2的正整数。
可选地，用于发送所述Y个SRS的符号集中分布在所述第n个子帧的最后Y个符号上。
结合第一方面或第一方面的上述任一种可能的实现方式，在第一方面的第六种可能的实现方式中，还包括：所述基站确定小区内所有UE的移动速度；所述基站根据所述小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定采用的小区级SRS子帧配置集合，并从确定的所述小区级SRS子帧配置集合中确定小区级SRS子帧配置参数，其中所述小区级SRS子帧配置集合与所述多个UE级SRS子帧配置集合相对应，所述小区级SRS子帧配置参数用于指示所述小区内用于发送SRS的子帧集合；所述基站向所述UE发送所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识信息。
其中，每个小区级SRS子帧配置集合中包括多种小区级SRS子帧配置参数。小区级SRS子帧配置集合也可以表的形式存储，此时，小区级SRS子帧配置集合也可以称为小区级SRS子帧配置表。
通过根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定采用的小区级SRS子帧配置集合，并从该小区级SRS子帧配置集合确定采用的小区级子帧配置参数，能够根据小区内所有UE的移动速度自适应调整小区的SRS资源，从而既能够满足既基站获取完整信道信息所需SRS资源的需求，又能够避免小区SRS资源的浪费。
另外，所述UE接收到小区级SRS子帧配置参数之后可确定在哪些子帧集合上可能会有UE发送SRS，这样能够避免小区内不同UE的SRS传输和物理上行共享信道PUSCH传输之间发生冲突。
可选地，基站可以根据小区内所有UE的平均移动速度从多个小区级SRS子帧配置集合中确定采用的小区级SRS子帧配置集合。
所述小区级SRS子帧配置参数可映射为所述小区级SRS子帧配置集合中的SRS配置周期和SRS子帧偏移集合。例如，所述小区级SRS子帧配置参数为小区级SRS子帧配置集合中的SRS子帧配置索引。
可选地，所述多个小区级SRS子帧配置集合可以与不同的速度取值区间相对应。
通过配置多个小区级SRS子帧配置集合，使得基站根据小区内所有UE的移动速度为确定采用的小区级SRS子帧配置集合的操作更加便捷。
可选地，所述基站还可以根据小区内所有UE的移动速度和小区内UE的数量从多个小区级SRS子帧配置集合中确定采用的小区级子帧配置集合。
由于小区内UE的数量会影响SRS资源的需求，根据小区内所有UE的移动速度和小区内UE的数量来确定小区级SRS子帧配置集合，能够进一步满足小区SRS资源的需求并避免SRS资源浪费。
应理解，基站和UE也可以只配置一个小区级SRS子帧配置集合，此时基站只需要根据小区内所有UE的移动速度和UE的数量从该小区级SRS子帧配置集合中确定采用 的小区级SRS子帧配置参数。
第二方面，提供了一种配置SRS的方法，所述方法包括：用户设备UE接收基站发送的UE级SRS子帧配置参数和所述UE级SRS子帧配置参数所属的UE级子帧配置集合的标识，所述UE级子帧配置集合是所述基站根据所述UE的移动速度从多个UE级子帧配置集合中确定的；所述UE根据所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识确定用于发送SRS的子帧。
UE中也可以预先配置多个UE级子帧配置集合，根据基站发送的UE级子帧配置集合的标识即可确定基站为UE分配的UE级子帧配置集合。
应理解，所述方法与上述第一方面所述方法相对应，在此适当省略相应的内容。
通过接收基站根据UE的移动速度确定的UE级SRS子帧配置集合标识和UE级SRS子帧配置参数，并根据二者确定用于发送SRS的子帧，能够使得发送的SRS满足基站为获取完整信道信息对SRS的需求。
结合第二方面，在第二方面的第一种可能的实现方式中，还包括：所述UE接收所述基站发送的数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
可选地，一个子帧内用于发送SRS的L1个符号集中分布在所述子帧的最后L1个符号上。
可选地，所述数量L1是根据所述基站的物理天线数和天线端口数的比值确定的。
结合第二方面或第二方面的第一种可能的实现方式，在第二方面的第二种可能的实现方式中，还包括：所述UE接收所述基站发送的指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数，L1为一个子帧内用于发送SRS的符号的最大数量。
可选地，发送所述L2个SRS采用的方式可以是根据基站根据UE的移动速度确定的。
可选地，所述指示信息还用于指示所述UE在触发非周期性SRS之后发送L2个SRS，或者用于指示所述UE在每个周期内发送L2个SRS。
结合第二方面的第二种可能的实现方式，在第二方面的第三种可能的实现方式中，所述方式包括在所述SRS子帧配置参数指示的1个子帧上连续发送所述L2个SRS。
结合第二方面的第二种可能的实现方式，在第二方面的第四种可能的实现方式中，所述方式包括在从所述SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
结合第二方面的第四种可能的实现方式，在第二方面的第五种可能的实现方式中，所述在所述SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：在从所述SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
Figure PCTCN2017082875-appb-000003
Figure PCTCN2017082875-appb-000004
N为大于或等于2且小于或等于L2的正整数。
结合第二方面或第二方面的上述任一种可能的实现方式，在第二方面的第六种可能的实现方式中，还包括：所述UE接收所述基站发送的小区级SRS子帧配置参数和所述小区级SRS子帧配置参数所属的小区级SRS子帧配置集合的标识，所述小区级SRS子帧配置集合是所述基站根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定的；所述UE根据所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识信息确定小区内用于发送SRS的子帧集合。
通过接收基站根据小区内所有UE的移动速度确定采用的小区级SRS子帧配置集合的标识和小区级SRS子帧配置参数，并根据二者确定小区内用于发送SRS的子帧集合，能够确定在哪些子帧集合上可能会有UE发送SRS，这样能够避免在小区内其他UE的可能用于发送SRS的子帧上传输物理上行共享信道PUSCH。
第三方面，提供了一种基站，用于执行第一方面或第一方面的任一种可能的实现方式所述的方法。
具体地，所述基站可以包括用于执行第一方面或第一方面的任一种可能的实现方式中所述的方法的单元。
第四方面，提供了一种用户设备，用于执行第二方面或第二方面的任一种可能的实现方式所述的方法。
具体地，所述用户设备可以包括用于执行第二方面或第二方面的任一种可能的实现方式中所述的方法的单元。
第五方面，提供了一种基站，包括处理器、发送器、存储器和总线系统，所述处理器、所述发送器和所述存储器通过所述总线系统相连，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，并且对所述存储器中存储的指令的执行使得所述基站执行第一方面或第一方面的任一种可能的实现方式所述的方法。
第六方面，提供了一种用户设备，包括处理器、接收器、存储器和总线系统，所述处理器、所述接收器和所述存储器通过所述总线系统相连，所述存储器用于存储指令，所述处理器用于执行所述存储器存储的指令，并且对所述存储器中存储的指令的执行使得所述用户设备执行第二方面或第二方面的任一种可能的实现方式所述的方法。
第七方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储一个或多个程序，所述一个或多个程序包括指令，所述指令当被基站执行时，使所述基站执行第一方面或第一方面的任一种可能的实现方式所述的方法。
第八方面，提供了一种计算机可读存储介质，所述计算机可读存储介质存储一个或多个程序，所述一个或多个程序包括指令，所述指令当被用户设备执行时，使所述用户设备执行第二方面或第二方面的任一种可能的实现方式所述的方法。
附图说明
图1是混合波束成形方案的示意性框图。
图2是根据本发明实施例的配置SRS的方法的示意性流程图；
图3是根据本发明实施例不同密度的SRS的资源配置示意图；
图4是根据本发明实施例的发送SRS采用的方式的示意图；
图5是根据本发明实施例的基站的结构示意图；
图6是根据本发明另一实施例的基站的结构示意图；
图7是根据本发明实施例的用户设备的结构示意图；
图8是根据本发明另一实施例的用户设备的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行描述。
本发明的技术方案，可以应用于各种无线通信系统，例如：宽带码分多址(Wideband Code Division Multiple Access Wireless，WCDMA)、高速分组接入(High-Speed Packet Access，HSPA)、长期演进(long term evolution，LTE)网络、未来网络，如5G等等系统以及其它将终端以无线方式互相连接的通信系统。
本发明实施例中的基站，为无线通信系统中的接入实体，可以是GSM或CDMA中的基站(Base Transceiver Station，BTS)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(evolved Node B，eNB或e-NodeB)，未来网络5G中的基站，本发明实施例对此并不限定。
还应理解，在本方面实施例中，用户设备(User Equipment，UE)可以是但不限于移动台(Mobile Station，MS)、移动终端(Mobile Terminal)、移动电话(Mobile Telephone)、手机(handset)及便携设备(portable equipment)等，该用户设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，例如，计算机等，用户设备还可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置。
SRS分成周期性SRS和非周期性SRS。周期性SRS一旦启用，UE会按照UE级子帧配置参数周期性地持续向基站发送SRS，直到SRS去使能为止。对于非周期SRS，基站会通过下行控制信息(Downlink control information，DCI)触发，该DCI中包含SRS的配置信息，终端收到该DCI后根据子帧配置参数仅在满足条件的第一个子帧上发送一个SRS。
SRS子帧配置包括小区级(cell specific)SRS子帧配置和UE级(UE specific)SRS子帧配置。其中UE级SRS子帧配置用于配置各个UE的SRS资源，小区级SRS子帧配置为小区内所有用户共用的SRS资源配置，UE级SRS子帧配置为UE的SRS资源配置。换句话说，小区级SRS子帧配置可以理解为SRS资源池，基站可以从该SRS资源池中为小区内的UE分配SRS资源。
无线上行信号以子帧为单位，每个子帧的时长为1毫秒(ms)。在上行方向上每个子帧分成14个单载波频分多址(Single Carrier Frequency Division Multiple Access，SC-FDMA)符号，为简洁，本文直接采用符号进行描述。如果SRS在某个子帧上发送，则SRS将占据该子帧的最后一个符号。如果子帧的最后一个符号分配给了SRS，则该符号将不能用于传输其他上行数据和上行信号。
应理解，本发明实施例中描述的用于发送SRS的子帧指的是上行子帧或特殊子帧。 下表1所示为在TDD系统中上下行子帧配置。
表1、上下行子帧配置表
Figure PCTCN2017082875-appb-000005
其中，D代表下行子帧，U代表上行子帧，S代表特殊子帧(可以当做上行子帧用)。特殊子帧包括3个特殊时隙，即下行导频时隙(Downlink Pilot Time Slot，DwPTS)，保护间隔(Guard Period，GP)和上行导频时隙(Uplink Pilot Time Slot，UpPTS)，DwPTS用于下行信号的发送，GP是上下行转换的保护间隔，UpPTS用于上行信号的发送，它的长度可以配置为1～2个符号。
为描述方便，本发明实施例中以小区级SRS子帧配置表为例描述小区级SRS子帧配置集合，以UE级SRS子帧配置表为例描述UE级SRS子帧配置集合。
表2所示为现有协议规定的TDD系统中小区级SRS子帧配置表，表2中列出了多种配置。现有协议中规定基站向UE下发的srs-SubframeConfig字段指用于指示小区级SRS子帧配置参数。在每个SRS子帧配置周期内，传输偏移ΔSFC规定了能够发送SRS的子帧号集合。srs-SubframeConfig字段指定的子帧上只有最后一个符号可用于发送SRS。以子帧配置1为例，SRS配置周期为5ms，传输偏移为{1,2}，则在子帧0到子帧4的长度为5ms的周期内，小区级的SRS资源分布在子帧1和子帧2上；在子帧0到子帧9的长度为10ms的周期内，小区级的SRS资源分布在子帧1、子帧2、子帧6和子帧7上。
表2、小区级SRS子帧配置表
Figure PCTCN2017082875-appb-000006
Figure PCTCN2017082875-appb-000007
表3所示为现有协议规定的TDD系统中UE级周期性SRS子帧配置表，表4所示为现有协议规定的TDD系统中UE级非周期性SRS子帧配置表。现有协议中规定基站向UE下发的信元(Information Element，IE)SoundingRS-UL-ConfigDedicated中的srs-ConfigIndex字段用于指示UE级周期性SRS配置参数，信元SoundingRS-UL-ConfigDedicatedAperiodic-r10中的srs-ConfigIndexAp-r10字段用于指示UE级非周期性SRS子帧配置参数。
在TDD系统中，对于SRS周期TSRS＞2的小区而言，发送周期性SRS的子帧满足：
(10·nf+kSRS-Toffset)modTSRS＝0      (1)；
对于SRS周期TSRS＝2的SRS传输而言，发送SRS的子帧满足：
(kSRS-Toffset)mod5＝0     (2)。
其中，nf为系统帧号，kSRS的定义参见表5。
表3、周期性SRS子帧配置表
Figure PCTCN2017082875-appb-000008
Figure PCTCN2017082875-appb-000009
表4、非周期性SRS子帧配置表
Figure PCTCN2017082875-appb-000010
表5、TDD系统中的kSRS
Figure PCTCN2017082875-appb-000011
在传统的二级波束成形方案中，第一级波束成形根据固定的天线下倾角进行设计， 不能调整。此时基站在SRS上配置静态波束成形进行信道估计可以得到有效信道信息。而现有的SRS方案主要是针对有效信道信息的获取进行设计的，不能很好地支持HBF动态模拟预编码获取完整信道信息长期统计特性的需求。
假设在一段时间内，UE的完整信道信息长期统计特性不变，UE可以在信道相干时间内连续发送多组宽带SRS，基站可以在不同的SRS上配置不同的模拟波束成形并进行信道估计得到多组宽带有效信道信息。据此，基站可以估算宽带的瞬时完整信道信息，并计算得到完整信道信息的长期统计特性。因此，本发明实施例中UE可以在信道相干时间内连续发送多组SRS，这样即可有利于基站获取完整信道信息。
由于不同移动速度的UE的信道相干时间不同，因此对于不同移动速度的UE来说，基站为获取完整信道信息对SRS的密度需求也不同。例如，UE移动速度较小时，完整信道的长期统计特性变化较慢，基站获取完整信道信息所需SRS的密度较低，此时如果UE发送的SRS密度较大，则将会造成时域资源的浪费。UE移动速度较大时，完整信道的长期统计特性变化较快，基站获取完整信道信息所需SRS的密度较高，此时如果UE发送的SRS密度较小，则将不利于基站获取完整信道信息。
在本发明实施例中，考虑到UE的移动速度将会影响SRS资源需求，为了满足不同移动速度的UE对SRS的资源的不同需求，可以在基站和UE中预先配置多个UE级子帧配置表。
可选地，对于小区而言，小区内所有UE的整体移动速度也会影响小区SRS资源池的大小，为了满足小区中不同UE移动场景对SRS的资源的不同需求，可以在系统中预先配置多个小区级SRS子帧配置表。
而且，小区内UE的数量也会影响SRS资源的需求。通过预先配置多个小区级SRS子帧配置表，使得能够在小区内UE的数目发生变化时，灵活调整小区SRS资源配置，避免SRS资源浪费。例如，小区内的UE数目增加时，增加小区级配置的SRS密度以提高信道估计准确性；小区内的UE数目减少时，降低小区级配置的SRS密度以避免SRS资源浪费。
本发明实施例中多个小区级SRS子帧配置表可以包括现有协议规定的小区级SRS子帧配置表，如表2所示，以及预先配置的其他小区级SRS子帧配置表，如表6所示。应注意，本发明实施例并不限于表6所示的其他小区级SRS子帧配置表的例子。
表6、小区级SRS子帧配置表
Figure PCTCN2017082875-appb-000012
Figure PCTCN2017082875-appb-000013
本发明实施例中可以预定义一种新的小区级SRS子帧配置参数字段(例如srs-SubframeConfig-BF字段)来表示其他小区级SRS子帧配置表中的SRS子帧配置参数。
可选地，多个小区级SRS子帧配置表可以分别与不同SRS密度需求的场景相对应。
需要说明的是，每个小区级SRS子帧配置表中可包括多种小区级SRS子帧配置参数，这样可以结合小区内所有UE的平均速度以及小区内UE的数量，选择合适的小区级SRS子帧配置参数。
可选地，本发明实施例中还可以在用于发送SRS的上行子帧的L1个符号上发送L1个SRS，L1为大于1的正整数。这样不仅增加了用于发送SRS的资源，还能够进一步加大发送的SRS密度的调整范围。
进一步地，还可以在上行子帧的L1个连续的符号上连续发送L1个SRS。
通过采用在一个子帧上连续发送多个SRS的方式，能够进一步增加UE发送SRS的密度，能够有利于基站在UE高速移动场景下为获取完整信道信息对SRS的需求。
可以由基站确定在一个上行子帧上的用于发送SRS的符号的数量L1，然后将该数量L1发送至UE。
例如，可以在基站中预先配置一个集合，基站可以从该集合中选取L1并发送至UE。例如L1的集合为{2,4,8}。或者，还可以在基站中预先配置算法，基站可以根据该预先配置的算法进行计算得到L1。例如，假设L1定义为基站物理天线数和天线端口数的比值，则基站可以根据物理天线数和天线端口数的比值进行计算得到L1。
或者，基站和UE也可以预先约定该数量L1，此时基站可以不向UE发送该数量L1。
基站和UE还可以预先约定在一个上行子帧上的用于发送SRS的L1个符号的位置。例如用于发送SRS的L1个符号集中在上行子帧的最后L1个符号上。
可选地，预先配置在基站中的小区级SRS子帧配置表中还可以包括L1的取值，如表7所示。
可以在现有协议规定的小区级SRS子帧配置参数字段srs-SubframeConfig中增加比特信息用于指示L1，还可以在预定义的新的小区级SRS子帧配置参数字段(例如srs-SubframeConfig-BF字段)中表示如表7所示小区级SRS子帧配置表中包括SRS配置周期、传输偏移和L1的SRS子帧配置参数。但本发明实施例对此并不限定，基站还可以采用其他方式向UE发送L1的指示信息。
表7、小区级SRS子帧配置表
Figure PCTCN2017082875-appb-000014
Figure PCTCN2017082875-appb-000015
本发明实施例中，多个UE级SRS子帧配置表可以包括现有协议规定的周期性或非周期性UE级SRS子帧配置表，如表3和表4所示，以及预先配置的其他UE级SRS子帧配置表。应注意，本发明实施例并不限于表8、表9、表16所示的UE级SRS子帧配置表的例子。
应注意，本发明实施例中，每个小区级SRS子帧配置表对应至少一个UE级SRS子帧配置表。
可以预定义一种新的UE级SRS子帧配置参数字段(例如srs-ConfigIndex-Prebf字段)来表示其他周期性的UE级SRS子帧配置表中的SRS子帧配置参数。同样，还可以预定义一种新的非周期性的UE级SRS子帧配置参数字段(例如srs-ConfigIndexAp-Prebf字段)来表示其他UE级非周期性SRS子帧配置表中的SRS子帧配置参数。
表8、UE级SRS子帧配置表
Figure PCTCN2017082875-appb-000016
表9、UE级SRS子帧配置表
Figure PCTCN2017082875-appb-000017
表10
Figure PCTCN2017082875-appb-000018
表11
Figure PCTCN2017082875-appb-000019
表12
Figure PCTCN2017082875-appb-000020
表13
Figure PCTCN2017082875-appb-000021
表14
Figure PCTCN2017082875-appb-000022
表15
Figure PCTCN2017082875-appb-000023
表16、UE级SRS子帧配置表
Figure PCTCN2017082875-appb-000024
以上介绍了本发明实施例中的小区级SRS子帧配置表和UE级SRS子帧配置表，下面结合图1介绍本发明实施例的配置SRS的方法。
图2是根据本发明实施例的配置SRS的方法200的流程示意图。
201、基站确定UE的移动速度。
例如，基站可以根据UE上报的位置信息确定UE的移动速度。
202、基站根据UE的移动速度，从采用的小区级SRS子帧配置表对应的多个UE级SRS子帧配置表中确定一个UE级SRS子帧配置表，并从确定的该UE级子帧配置表中确定UE级SRS子帧配置参数，UE级SRS子帧配置参数用于指示用于发送SRS的子帧。
多个UE级SRS子帧配置可以与不同的速度区间相对应。例如，多个UE级SRS子帧配置表中的第一UE级SRS子帧配置表与速度区间[v1，v2]相对应，第二UE级SRS子帧配置表与速度区间[v3，v4]相对应，以此类推，不再赘述。
其中，UE级SRS子帧配置参数可以为周期性SRS子帧配置参数或非周期性SRS子帧配置参数。
203、基站向UE发送UE级SRS子帧配置参数和该UE级子帧配置表的标识信息。
可选地，UE级SRS子帧配置参数和UE级子帧配置表的标识信息可以携带在同一个配置字段中。相应地，步骤203包括：基站向UE发送消息，该消息的字段中携带UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息。
例如，可在现有协议规定的UE级SRS子帧配置字段中增加特定长度(如1比特)的比特信息用于标识该UE级SRS子帧配置表。对于周期性SRS，UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息可以携带在srs-ConfigIndex字段中；对于非周期性SRS，UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息携带在srs-ConfigIndexAp-r10字段中。
再如，还可以定义一种新的UE级SRS子帧配置字段，如srs-ConfigIndex-Prebf或srs-ConfigIndexAp-Prebf。对于周期性SRS，UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息可以携带在srs-ConfigIndex-Prebf字段中；对于非周期性SRS，UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息携带在srs-ConfigIndexAp-Prebf字段中。
应理解，UE级SRS子帧配置参数和UE级子帧配置表的标识信息也可以携带在不同的配置字段中。本发明实施例对此不做限定。
考虑到与现有技术兼容，如果步骤202中确定的UE级SRS子帧配置表为现有协议规定的，则UE级SRS子帧配置参数可以携带在基站向UE发送的srs-ConfigIndex字段或srs-ConfigIndexAp-r10字段中，此时该UE级SRS子帧配置表的标识信息可以默认不发送，或者通过其他字段或信元发送至UE。
本发明实施例中，基站可以根据UE的移动速度确定为UE分配的UE级SRS子帧配置表和UE级SRS子帧配置参数。这样能够为不同移动速度的UE分配不同密度的SRS时域资源，使得既能够满足基站为获取完整信道信息对SRS的需求，从而有利于基站获取完整信道信息，又能够避免时域资源浪费。
图3所示为不同密度的SRS的资源配置的示意图。例如，低密度的SRS可以用于获取有效信道，或者也可以用于移动速度低于预设阈值的UE获取完整信道信息，而高密度的SRS可以用于移动速度高于预设阈值的UE获取完整信道信息。
需要说明的是，步骤202中基站可以从UE级子帧配置表中确定一种或多种UE级SRS子帧配置参数，相应地步骤203中基站可以向UE发送确定的一种或多种UE级SRS子帧配置参数。这种情况下，UE可以从接收到的一种或多种UE级SRS子帧配置参数中选择其中的至少一种SRS子帧配置参数指示的子帧用来发送SRS。
204、UE根据接收到的UE级SRS子帧配置参数和UE级SRS子帧配置表的标识信息确定用于发送SRS的子帧。
具体地，UE根据UE级SRS子帧配置表的标识信息从预先配置的多个UE级SRS子帧配置表中找到基站分配的该UE级SRS子帧配置表，并根据UE级SRS子帧配置参数从该UE级SRS子帧配置表中确定用于发送SRS的子帧。
如果UE级SRS子帧配置参数为周期性SRS子帧配置参数，此时UE可以周期性地在指定的用于发送SRS的子帧上发送SRS。
如果UE级SRS子帧配置参数为非周期性SRS子帧配置参数，UE在接收到基站下发的触发信息后，UE会在指定的用于发送SRS的子帧上发送SRS。
可选地，当基站和UE中配置了多个小区级SRS子帧配置表时，在确定UE级SRS 子帧配置表之前，还需要确定采用的小区级SRS子帧配置表。相应地，方法200还可以包括：
201’、基站确定小区内所有UE的移动速度。
应注意，当执行步骤201’之后，由于小区内所有UE的移动速度包括UE的移动速度，此时可以不执行步骤201。
202’、基站根据小区内所有UE的移动速度从多个小区级SRS子帧配置表中确定采用的小区级SRS子帧配置表，并从确定的小区级SRS子帧配置表中确定小区级SRS子帧配置参数，小区级SRS子帧配置参数用于指示小区内用于发送SRS的子帧集合。
经过步骤202’可以确定当前采用的小区级SRS子帧配置表，在步骤202之前执行。
可选地，基站可以根据小区内所有UE的平均移动速度从多个小区级SRS子帧配置表中确定采用的小区级SRS子帧配置表。
203’、基站向UE发送小区级SRS子帧配置参数和采用的小区级SRS子帧配置集合的标识信息。
可选地，小区级SRS子帧配置参数和小区级SRS子帧配置表的标识信息可以携带在同一个配置字段中。相应地，步骤203’包括：基站向UE发送消息，该消息的字段中携带小区级SRS子帧配置参数和小区级SRS子帧配置表的标识信息。
例如，可在现有协议规定的小区级SRS子帧配置字段中增加特定长度(如1比特)的标识信息用于指示该小区级SRS子帧配置表。小区级SRS子帧配置参数和小区级SRS子帧配置表的标识信息可以携带在srs-SubframeConfig字段中。
再如，还可以定义一种新的小区SRS子帧配置字段，如srs-SubframeConfig-BF。小区级SRS子帧配置参数和小区级SRS子帧配置表的标识信息可以携带在srs-SubframeConfig-BF字段中。
srs-SubframeConfig或srs-SubframeConfig-BF可以通过系统信息块(System Information Block，SIB)2下发给UE。
应理解，小区级SRS子帧配置参数和小区级SRS子帧配置表的标识信息也可以携带在不同的配置字段中。本发明实施例对此不做限定。
考虑到与现有技术兼容，如果步骤202’中确定的小区级SRS子帧配置表为现有协议规定的，则与现有技术相同，小区级SRS子帧配置参数携带在基站向UE发送的srs-SubframeConfig字段中，此时该小区级SRS子帧配置表的标识信息可以默认不发送，或者通过其他字段或信元发送至UE。
需要说明的是，步骤203、203’可以同时执行，也可以不同时执行，本发明实施例对此并不限定。
基站可以同时向UE发送小区级SRS配置信息和UE级SRS配置信息，也可以只向UE发送UE级SRS配置信息。例如，基站向UE发送小区级SRS配置信息之后的在一定时段内，基站再次为UE配置SRS资源时，基站可以只向UE发送UE级SRS配置信息。
204’、UE根据基站发送的小区级SRS子帧配置参数和采用的小区级SRS子帧配置集合的标识信息确定小区内用于发送SRS的子帧集合。
这样能够避免在小区内其他UE的用于发送SRS的子帧中用于发送SRS的符号上传输物理上行共享信道(Physical Uplink Shared Channel，PUSCH)。
可选地，方法200还可以包括：基站向UE发送数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
本发明实施例中，可以在现有的小区级SRS子帧配置参数字段srs-SubframeConfig中增加L1的指示信息。也可以在现有的UE级SRS子帧配置参数字段srs-ConfigIndex和srs-ConfigIndexAp-r10中增加L1的指示信息。但本发明实施例并不限于此，还可以定义新的小区级SRS子帧配置参数字段(例如srs-SubframeConfig-BF字段)或UE级SRS子帧配置参数字段(例如srs-ConfigIndex-Prebf字段)，在该小区级SRS子帧配置参数字段或UE级SRS子帧配置参数字段中携带L1的指示信息。
一个子帧内用于发送SRS的符号的位置可以预先配置在基站和UE中，或者也可以由基站和UE预先约定。
例如，一个子帧内用于发送SRS的L1个符号的位置可以集中分布在所述子帧的最后L1个符号上。
相应地，UE根据接收到的数量L1能够避免在小区内其他UE可能用于发送SRS的子帧的符号上进行PUSCH传输。
可选地，方法200还可以包括：基站向UE发送指示信息。对于非周期性SRS来说，该指示信息用于指示UE在触发非周期性SRS之后发送L2个SRS；对于周期性SRS来说，该指示信息可以用于指示UE在每个周期内发送L2个SRS，其中，L2为大于1且小于或等于L1的正整数。相应地，UE根据接收到的该指示信息，可以在接收到非周期SRS的触发后发送L2个非周期性SRS，或在每个周期内发送L2个周期性SRS。可选地，基站发送的该指示信息还用于指示发送L2个SRS采用的方式。相应地，UE根据该指示信息指示的方式发送L2个SRS。
换句话说，基站可以指示UE在触发非周期性SRS之后发送SRS的数量或者UE在每个周期内发送SRS的数量。
应理解，基站和UE还可以预先预定UE在触发非周期性SRS之后发送SRS的数量或者UE在每个周期内发送SRS的数量L2，例如该数量L2等于L1。此时，基站只需向UE发送指示信息，用于指示发送SRS采用的方式。也就是说，方法200还可以包括：向UE发送指示信息，该指示信息用于指示UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示UE在每个周期内发送L2个SRS采用的方式。
可选地，发送L2个SRS采用的方式可以是基站根据UE的移动速度确定的。基站根据UE的移动速度可以指示UE采用多种不同的方式发送L2个SRS。例如，基站中可以预先配置UE的移动速度与发送SRS的方式之间的对应关系。
可选地，该方式包括在UE级SRS子帧配置参数指示的1个子帧上发送L2个SRS。例如，可以在该子帧的最后L2个符号上连续发送L2个SRS。
对于特殊子帧来说，UpPTS长度为1个或2个符号，因此一个特殊子帧最多只能用于连续发送2个SRS，因此，在这种场景下，可以在UE级SRS子帧配置表中配置上行子帧用于发送SRS，这样能够进一步提高UE发送SRS的密度，适用于UE高速移动的场景。
例如，由表1可知子帧偏移为1、6对应的是特殊子帧，表8和表16所示UE级SRS子帧配置表中不包括SRS子帧偏移为1、6的配置，因此如果将表8和表16用于该场景下的SRS配置，则UE可以在一个上行子帧上发送2个以上SRS，这将有利于基站在UE 高速移动的场景下获取完整信道信息。例如，表8可用于周期性SRS的子帧配置，表16可用于非周期性SRS的子帧配置。应理解，本发明实施例仅以此为例进行描述，对此并不限定。
可选地，该方式包括在从UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送L2个SRS。例如，该场景下，表9可用于周期性SRS的子帧配置，表3可用于非周期性SRS的子帧配置。同样，本发明实施例仅以此为例进行描述，对此并不限定。
可选地，在从UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：在从UE级SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
Figure PCTCN2017082875-appb-000025
Figure PCTCN2017082875-appb-000026
N为大于或等于2且小于或等于L2的正整数，普通子帧指的是表1中所示的上行子帧，
Figure PCTCN2017082875-appb-000027
表示向上取整。
N的取值与UE的移动速度有关，UE的移动速度越快，N的取值越小。
可以用长度可以为2比特(bit)的信息指示发送L2个SRS采用的方式，如表17所示。应理解，根据N和L2的取值的组合情况，也可以用其他长度的信息指示发送L2个SRS采用的方式。
表17
Figure PCTCN2017082875-appb-000028
如图4所示，假设在一个周期内发送4个SRS，则当UE的移动速度V＞V1时，基站可以指示UE在满足条件的一个子帧上连续发送4个SRS；当UE的移动速度V2＜V＜V1时，基站可以指示UE在满足条件的两个子帧中的每个子帧上连续发送2个SRS； 当UE的移动速度V＜V2时，基站可以指示UE在满足条件的四个子帧中的每个子帧上发送1个SRS。当UE的移动速度V为两种发送方式对应的移动速度的临界值时，基站可以指示UE采用该两种发送方式中的任一种发送SRS，例如V＝V2时，基站可以指示UE在满足条件的两个子帧中的每个子帧上连续发送2个SRS，或者指示UE在满足条件的四个子帧中的每个子帧上发送1个SRS。
图5是根据本发明实施例的基站500的结构示意图。基站500用于实现图2所示方法200中由基站执行的方法。基站500可以包括确定单元510和发送单元520。
确定单元510用于：确定用户设备UE的移动速度；根据UE的移动速度，从采用的小区级SRS子帧配置集合对应的多个UE级SRS子帧配置集合中确定一个UE级子帧配置集合，并从确定的UE级子帧配置集合中确定UE级SRS子帧配置参数，UE级SRS子帧配置参数用于指示用于发送SRS的子帧。
发送单元520，用于向UE发送确定单元确定的UE级SRS子帧配置参数和UE级子帧配置集合的标识信息。
通过根据UE的移动速度从多个UE级SRS子帧配置集合中确定为UE分配的UE级SRS子帧配置集合，并从该UE级SRS子帧配置集合中确定UE级SRS子帧配置参数，使得能够根据UE的移动速度自适应调整UE发送SRS的密度，从而能够有利于基站获取完整信道信息。
可选地，UE500还可以包括接收单元，用于接收UE发送的SRS，以及其他上行信号。
可选地，确定单元510还用于：确定小区内所有UE的移动速度；根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定采用的小区级SRS子帧配置集合，并从小区级SRS子帧配置集合中确定小区级SRS子帧配置参数，小区级SRS子帧配置参数用于指示小区内用于发送SRS的子帧集合。相应地，发送单元520还用于，向UE发送确定单元确定的小区级SRS子帧配置参数和小区级SRS子帧配置集合的标识。
可选地，发送单元520还用于，向UE发送数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
可选地，发送单元520还用于，向UE发送指示信息，指示信息用于指示UE在触发非周期性SRS之后发送L2个SRS，或者用于指示UE在每个周期内发送L2个SRS。可选地，指示信息还用于指示发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数。
可替代地，发送单元520还用于，向UE发送指示信息，该指示信息用于指示UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示UE在每个周期内发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数。
可选地，该方式包括在UE级SRS子帧配置参数指示的1个子帧上发送L2个SRS。或者，该方式包括在从UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送L2个SRS。
可选地，在UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送L2个SRS包括：在从SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完L2个SRS，其中，
Figure PCTCN2017082875-appb-000029
Figure PCTCN2017082875-appb-000030
N为大于或等于2且小于或等于L2的正整数。
应注意，本发明实施例中确定单元510可以由处理器实现，发送单元可以由发送器实现。如图6所示，基站600可以包括处理器610、发送器620、存储器630和总线系统640，处理器610、发送器620和存储器630通过总线系统640相连。其中，存储器630可以用于存储处理器610执行的代码等。
总线系统640除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
可选地，基站600还可以包括接收器，用于接收UE发送的SRS，以及其他上行信号。
图5所示的基站500和图6所示的基站600能够实现前述方法实施例中由基站实现的各个过程，为避免重复，在此不再赘述。
应注意，本申请上述方法实施例可以应用于处理器中，或者由处理器实现。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor，DSP)、专用集成电路(Application Specific Integrated Circuit，ASIC)、现成可编程门阵列(Field Programmable Gate Array，FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本发明实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是只读存储器(Read-Only Memory，ROM)、可编程只读存储器(Programmable ROM，PROM)、可擦除可编程只读存储器(Erasable PROM，EPROM)、电可擦除可编程只读存储器(Electrically EPROM，EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory，RAM)，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如静态随机存取存储器(Static RAM，SRAM)、动态随机存取存储器(Dynamic RAM，DRAM)、同步动态随机存取存储器(Synchronous DRAM，SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM，DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM，ESDRAM)、同步连接动态随机 存取存储器(Synchlink DRAM，SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM，DR RAM)。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
图7是根据本发明实施例的UE 700的结构示意图。如图7所示，UE 700包括接收单元710和确定单元720。
接收单元710，用于接收基站发送的UE级SRS子帧配置参数和UE级SRS子帧配置参数所属的UE级子帧配置集合的标识，UE级子帧配置集合是基站根据UE的移动速度从采用的小区级SRS子帧配置集合对应的多个UE级子帧配置集合中确定的；
确定单元720，用于根据接收单元接收到的UE级SRS子帧配置参数和UE级子帧配置集合的标识确定用于发送SRS的子帧。
通过接收基站根据UE的移动速度确定的UE级SRS子帧配置集合标识和UE级SRS子帧配置参数，并根据二者确定用于发送SRS的子帧，能够使得发送的SRS满足基站为获取完整信道信息对SRS的需求。
可选地，UE 700还可以包括发送单元，用于发送SRS，以及其他上行信号。
可选地，接收单元710还用于，接收基站发送的小区级SRS子帧配置参数和小区级SRS子帧配置参数所属的小区级SRS子帧配置集合的标识，小区级SRS子帧配置集合是基站根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定的。相应地，确定单元720还用于，根据接收单元接收到的小区级SRS子帧配置参数和小区级SRS子帧配置集合的标识确定小区内用于发送SRS的子帧集合。
通过接收基站根据小区内所有UE的移动速度确定采用的小区级SRS子帧配置集合的标识和小区级SRS子帧配置参数，并根据二者确定小区内用于发送SRS的子帧集合，能够确定在哪些子帧集合上可能会有UE发送SRS，这样能够避免在小区内其他UE的可能用于发送SRS的子帧上传输物理上行共享信道PUSCH。
可选地，接收单元710还用于，接收基站发送的数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
可选地，接收单元710还用于，接收基站发送的指示信息，指示信息用于指示UE在触发非周期性SRS之后发送L2个SRS；或者，指示信息用于指示UE在每个周期内发送L2个SRS，其中，L2为大于1且小于或等于L1的正整数。
可选地，指示信息还用于指示发送L2个SRS采用的方式。
可选地，该方式包括在UE级SRS子帧配置参数指示的1个子帧上发送L2个SRS；或者，该方式包括在从UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送L2个SRS。
可选地，在UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送L2个SRS包括：在从UE级SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完L2个SRS，其中，
Figure PCTCN2017082875-appb-000031
Figure PCTCN2017082875-appb-000032
N为大于或等于2且小于或等于L2的正整数。
应注意，本发明实施例中接收单元710可以由接收器实现，确定单元720可以由处理器实现。如图8所示，UE 800可以包括处理器810、接收器820、存储器830和总线系统840，处理器810、接收器820和存储器830通过总线系统840相连。其中，存储器830可以用于存储处理器810执行的代码等。
总线系统840除包括数据总线之外，还包括电源总线、控制总线和状态信号总线。
可选地，UE 800还可以包括发送器，用于发送SRS，以及其他上行信号。
图7所示的UE 700和图8所示的UE 800能够实现前述方法实施例中由UE实现的各个过程，为避免重复，在此不再赘述。
应注意，本申请上述方法实施例可以应用于处理器中，或者由处理器实现。处理器可能是一种集成电路芯片，具有信号的处理能力。在实现过程中，上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、DSP、ASIC、FPGA或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本发明实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本发明实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成，或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器，闪存、只读存储器，可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器，处理器读取存储器中的信息，结合其硬件完成上述方法的步骤。
可以理解，本发明实施例中的存储器可以是易失性存储器或非易失性存储器，或可包括易失性和非易失性存储器两者。其中，非易失性存储器可以是ROM、PROM、EPROM、EEPROM或闪存。易失性存储器可以是RAM，其用作外部高速缓存。通过示例性但不是限制性说明，许多形式的RAM可用，例如SRAM、DRAM、SDRAM、DDR SDRAM、ESDRAM、SLDRAM和DR RAM。应注意，本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本领域普通技术人员可以意识到，结合本文中所公开的实施例描述的各示例的单元及算法步骤，能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行，取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能，但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统、装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，单元的 划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。
功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U盘、移动硬盘、只读存储器(Read-Only Memory，ROM)、随机存取存储器(Random Access Memory，RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上，仅为本申请的具体实施方式，但本申请的保护范围并不局限于此，任何熟悉本技术领域的技术人员在本申请揭露的技术范围内，可轻易想到变化或替换，都应涵盖在本申请的保护范围之内。因此，本申请的保护范围应以权利要求的保护范围为准。

Claims (28)

  1. 一种配置探测参考信号SRS的方法，其特征在于，包括：
    基站确定用户设备UE的移动速度；
    所述基站根据所述UE的移动速度，从采用的小区级SRS子帧配置集合对应的多个UE级SRS子帧配置集合中确定一个UE级子帧配置集合，并从确定的所述UE级子帧配置集合中确定UE级SRS子帧配置参数，所述UE级SRS子帧配置参数用于指示用于发送SRS的子帧；
    所述基站向所述UE发送所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识信息。
  2. 根据权利要求1所述的方法，其特征在于，还包括：
    所述基站向所述UE发送数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
  3. 根据权利要求1或2所述的方法，其特征在于，还包括：
    所述基站向所述UE发送指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数，L1为一个子帧内用于发送SRS的符号的最大数量。
  4. 根据权利要求3所述的方法，其特征在于，所述方式包括在所述UE级SRS子帧配置参数指示的1个子帧上发送所述L2个SRS。
  5. 根据权利要求3所述的方法，其特征在于，所述方式包括在从所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
  6. 根据权利要求5所述的方法，其特征在于，所述在所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：
    在从所述SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
    Figure PCTCN2017082875-appb-100001
    Figure PCTCN2017082875-appb-100002
    N为大于或等于2且小于或等于L2的正整数。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，还包括：
    所述基站确定小区内所有UE的移动速度；
    所述基站根据所述小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定采用的所述小区级SRS子帧配置集合，并从所述小区级SRS子帧配置集合中确定小区级SRS子帧配置参数，所述小区级SRS子帧配置参数用于指示所述小区内用于发送SRS 的子帧集合；
    所述基站向所述UE发送所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识。
  8. 一种配置探测参考信号SRS的方法，其特征在于，包括：
    用户设备UE接收基站发送的UE级SRS子帧配置参数和所述UE级SRS子帧配置参数所属的UE级子帧配置集合的标识，所述UE级子帧配置集合是所述基站根据所述UE的移动速度从采用的小区级SRS子帧配置集合对应的多个UE级子帧配置集合中确定的；
    所述UE根据所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识确定用于发送SRS的子帧。
  9. 根据权利要求8所述的方法，其特征在于，还包括：
    所述UE接收所述基站发送的数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
  10. 根据权利要求8或9所述的方法，其特征在于，还包括：
    所述UE接收所述基站发送的指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式采用的方式，其中，L2为大于1且小于或等于L1的正整数，L1为一个子帧内用于发送SRS的符号的最大数量。
  11. 根据权利要求10所述的方法，其特征在于，所述方式包括在所述UE级SRS子帧配置参数指示的1个子帧上发送所述L2个SRS。
  12. 根据权利要求10所述的方法，其特征在于，所述方式包括在从所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
  13. 根据权利要求12所述的方法，其特征在于，所述在所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：
    在从所述UE级SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
    Figure PCTCN2017082875-appb-100003
    Figure PCTCN2017082875-appb-100004
    N为大于或等于2且小于或等于L2的正整数。
  14. 根据权利要求8至13中任一项所述的方法，其特征在于，还包括：
    所述UE接收所述基站发送的小区级SRS子帧配置参数和所述小区级SRS子帧配置参数所属的小区级SRS子帧配置集合的标识，所述小区级SRS子帧配置集合是所述基站根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定的；
    所述UE根据所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识确定小区内用于发送SRS的子帧集合。
  15. 一种基站，其特征在于，包括：
    确定单元，用于确定用户设备UE的移动速度；
    所述确定单元还用于，根据所述UE的移动速度，从采用的小区级SRS子帧配置集合对应的多个UE级SRS子帧配置集合中确定一个UE级子帧配置集合，并从确定的所述UE级子帧配置集合中确定UE级SRS子帧配置参数，所述UE级SRS子帧配置参数用于指示用于发送SRS的子帧；
    发送单元，用于向所述UE发送所述确定单元确定的所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识信息。
  16. 根据权利要求15所述的基站，其特征在于，
    所述发送单元还用于，向所述UE发送数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
  17. 根据权利要求15或16所述的基站，其特征在于，
    所述发送单元还用于，向所述UE发送指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数，L1为一个子帧内用于发送SRS的符号的最大数量。
  18. 根据权利要求17所述的基站，其特征在于，所述方式包括在所述UE级SRS子帧配置参数指示的1个子帧上发送所述L2个SRS。
  19. 根据权利要求17所述的基站，其特征在于，所述方式包括在从所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
  20. 根据权利要求19所述的基站，其特征在于，所述在所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：
    在从所述SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
    Figure PCTCN2017082875-appb-100005
    Figure PCTCN2017082875-appb-100006
    N为大于或等于2且小于或等于L2的正整数。
  21. 根据权利要求15至20中任一项所述的基站，其特征在于，
    所述确定单元还用于：确定小区内所有UE的移动速度；根据所述小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定采用的所述小区级SRS子帧配置集合，并从所述小区级SRS子帧配置集合中确定小区级SRS子帧配置参数，所述小区级SRS 子帧配置参数用于指示所述小区内用于发送SRS的子帧集合；
    所述发送单元还用于，向所述UE发送所述确定单元确定的所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识。
  22. 一种用户设备UE，其特征在于，包括：
    接收单元，用于接收基站发送的UE级SRS子帧配置参数和所述UE级SRS子帧配置参数所属的UE级子帧配置集合的标识，所述UE级子帧配置集合是所述基站根据所述UE的移动速度从采用的小区级SRS子帧配置集合对应的多个UE级子帧配置集合中确定的；
    确定单元，用于根据所述接收单元接收到的所述UE级SRS子帧配置参数和所述UE级子帧配置集合的标识确定用于发送SRS的子帧。
  23. 根据权利要求22所述的用户设备，其特征在于，
    所述接收单元还用于，接收所述基站发送的数量L1，L1为一个子帧内用于发送SRS的符号的最大数量，L1为大于1的正整数。
  24. 根据权利要求22或23所述的用户设备，其特征在于，
    所述接收单元还用于，接收所述基站发送的指示信息，所述指示信息用于指示所述UE在触发非周期性SRS之后发送L2个SRS采用的方式，或者用于指示所述UE在每个周期内发送L2个SRS采用的方式，其中，L2为大于1且小于或等于L1的正整数，L1为一个子帧内用于发送SRS的符号的最大数量。
  25. 根据权利要求24所述的用户设备，其特征在于，所述方式包括在所述UE级SRS子帧配置参数指示的1个子帧上发送所述L2个SRS。
  26. 根据权利要求24所述的用户设备，其特征在于，所述方式包括在从所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS。
  27. 根据权利要求26所述的用户设备，其特征在于，所述在所述UE级SRS子帧配置参数指示的子帧开始的多个子帧上发送所述L2个SRS包括：
    在从所述UE级SRS子帧配置参数指示的子帧开始的第n个子帧上传输Y个SRS，直至发送完所述L2个SRS，其中，
    Figure PCTCN2017082875-appb-100007
    Figure PCTCN2017082875-appb-100008
    N为大于或等于2且小于或等于L2的正整数。
  28. 根据权利要求22至27中任一项所述的用户设备，其特征在于，
    所述接收单元还用于，接收所述基站发送的小区级SRS子帧配置参数和所述小区级SRS子帧配置参数所属的小区级SRS子帧配置集合的标识，所述小区级SRS子帧配置集合是所述基站根据小区内所有UE的移动速度从多个小区级SRS子帧配置集合中确定的；
    所述确定单元还用于，根据所述接收单元接收到的所述小区级SRS子帧配置参数和所述小区级SRS子帧配置集合的标识确定小区内用于发送SRS的子帧集合。
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CN112262592A (zh) * 2018-06-22 2021-01-22 华为技术有限公司 负载均衡方法及设备
CN112262592B (zh) * 2018-06-22 2022-02-08 华为技术有限公司 负载均衡方法及设备
US11405825B2 (en) 2018-06-22 2022-08-02 Huawei Technologies Co., Ltd. Load balancing method and device
WO2020168350A1 (en) * 2019-02-15 2020-08-20 Apple Inc. System and method for dynamically configuring user equipment sounding reference signal(srs) resources
US11664874B2 (en) 2019-02-15 2023-05-30 Apple Inc. System and method for dynamically configuring user equipment sounding reference signal (SRS) resources
CN113541899A (zh) * 2020-04-21 2021-10-22 维沃移动通信有限公司 Srs的频域参数更新方法和设备

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US20190109689A1 (en) 2019-04-11
CN107347005B (zh) 2020-09-11
EP3444973A1 (en) 2019-02-20
CN107347005A (zh) 2017-11-14
US10819484B2 (en) 2020-10-27
EP3444973B1 (en) 2020-08-12

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