BR112019005504B1 - METHOD OF TRANSMISSION OF CHANNEL SOUND REFERENCE SIGNALS AND TERMINAL DEVICE FOR TRANSMITTING CHANNEL SOUND REFERENCE SIGNAL - Google Patents

Abstract

A method of transmitting sound reference signals (SRS), a network device and a terminal device are described in the present invention. The method comprises: a network device that determines various symbols used for SRS transmission in the first upper link subframe; wherein the network device transmits first indication information to each of the plurality of terminal devices, the first indication information is used to indicate a symbol among the plurality of symbols corresponding to each said terminal device, the first terminal device among the plurality of terminal devices corresponds to a first symbol among the plurality of symbols and the first symbol is used to transmit the SRS of the first terminal device. During transmission between the network device and the terminal device using reciprocity of upper link and lower link channels, therefore, the influences caused by the characteristic aging of channels can be reduced.

Description

Field of Invention

[001] Embodiments of the present invention relate to the field of wireless communications and, more specifically, to a method of transmitting sound reference signals (SRS) from channels, network device and terminal device.

Background of the Invention

[002] Multiple Input and Multiple Output (MIMO) is a core technology for Fourth Generation (4G) and Fifth Generation (5G) communication. In a Long Term Evolution (LTE)/LTE Advanced (LTE-A) system, closed-loop MIMO based on codebook feedback becomes mainstream and is fully developed. In a 5G massive MIMO system, closed-loop non-codebook MIMO technology based on uplink/downlink channel reciprocity will be applied more widely. This means that Channel State Information (CSI) is obtained in advance by estimating upper link channels for beamforming/lower link precoding transmission.

[003] Closed-loop MIMO transmission using reciprocity of upper link and lower link channels in a 5G communication system is also faced with many technical challenges. Two main challenges are the channel aging problem and the limit problem on the quantity of upper link reference signals, such as channel SRSs. As the channel aging effect of a 4G system is not that serious, the latencies between an SRS, codebook feedback and signal transmission of an LTE system may not exceed a channel's coherence time, even though they are relatively long. . The LTE system is not particularly optimized, therefore, to reduce channel measurement latency for data transmission. For periodic SRS or aperiodic SRS, the SRS is configured on only one last symbol of each upper link subframe.

[004] In the 5G system, however, the channel aging effect can be greatly intensified and the coherence time can also be greatly reduced.

Brief Description of the Invention

[005] Embodiments of the present invention provide a transmission method of SRS, network device and terminal device, which can reduce the influence caused by channel aging in a transmission process based on reciprocity of upper link and lower link channels.

[006] First aspect provides a channel SRS transmission method, which is characterized by including the following operations.

[007] A network device determines several transmission symbols of SRSs in the first upper link subframe.

[008] The network device transmits first indication information to each of several terminal devices, wherein the first indication information indicates the symbol corresponding to each terminal device among the several symbols, first terminal device among the several terminal devices corresponds to first symbol among the multiple symbols and the first symbol is used to transmit SRS from the first terminal device.

[009] As all transmission symbols of the SRSs of the various terminal devices are located in the first upper link subframe, the influence caused by channel aging can be reduced in a transmission process based on reciprocity of upper link and link channels. bottom of the network device and terminal devices.

[0010] Alternatively, the number of subframes between the first upper link subframe and the first lower link subframe after the first upper link subframe may be less than or equal to a previously determined amount.

[0011] Alternatively, a following subframe of the first upper link subframe may be a lower link subframe.

[0012] Alternatively, the length of the first symbol for transmission of the SRS according to the first terminal device may be different from the length of a second symbol for transmission of lower link data from the first terminal device.

[0013] Alternatively, the method may further include the following: determining, by the network device, a frequency domain resource for transmitting the SRS of the first terminal device, wherein the first indication information transmitted to the first terminal device by the network device further indicates the frequency domain capability for transmitting the SRS of the first terminal device.

[0014] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device may be identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[0015] Alternatively, the method may additionally include the following: receiving, by the network device, second indication information indicating channel aging speed of the first terminal device from the first terminal device.

[0016] Alternatively, the method may additionally include the following: determining, by the network device, the second symbol for transmitting the lower link data of the first terminal device in accordance with the channel aging rate, wherein the first information of indication transmitted to the first terminal device by the network device further indicates the second symbol for transmitting the lower link data from the first terminal device.

[0017] Alternatively, the various symbols may additionally include a symbol for SRS transmission of a second terminal device, the channel aging rate of the first terminal device may be higher than the channel aging rate of the second terminal device, which first symbol for transmitting the SRS of the first terminal device may be located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device may be located before a symbol for transmitting data of the second terminal device.

[0018] Alternatively, the second indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[0019] Second aspect provides a network device that can be configured to perform each process performed by the network device in the SRS transmission method in accordance with the first aspect and each embodiment. The network device includes a determination module and a transmitter module. The determination module is configured to determine various symbols for transmission of SRSs in first upper link subframe. The transmission module is configured to transmit first indication information to each of a plurality of terminal devices, wherein the first indication information indicates the symbol corresponding to each terminal device among the plurality of symbols determined by the determination module, wherein a first device terminal among the plurality of terminal devices corresponds to a first symbol among the plurality of symbols and the first symbol is used to transmit SRS from the first terminal device.

[0020] Third aspect provides a network device that can be configured to perform each process performed by the network device in the SRS transmission method in accordance with the first aspect and each embodiment. The network device includes a processor and a transceiver. The processor is configured to determine various symbols for transmitting SRSs in a first upper link subframe. The transceiver is configured to transmit first indication information to each of a plurality of terminal devices, wherein the first indication information indicates the symbol corresponding to each terminal device among the plurality of symbols determined by a determination module, wherein a first terminal device among the plurality of terminal devices corresponds to a first symbol among the plurality of symbols and the first symbol is used to transmit SRS from the first terminal device.

[0021] Fourth aspect provides a channel SRS transmission method, which is characterized by including the following steps.

[0022] First terminal device receives first indication information from a network device, wherein the first indication information indicates first symbol for transmission of SRSs from the first terminal device in first upper link subframe, the first upper link subframe includes several symbols for transmitting SRSs from plural terminal devices, the plural terminal devices include the first terminal device, and the plural symbols include the first symbol.

[0023] The first terminal device transmits the SRS from the first terminal device to the network device in the first symbol.

[0024] As all transmission symbols of the SRSs of the various terminal devices are located in the first upper link subframe, the influence caused by channel aging can be reduced in a transmission process based on reciprocity of upper link and link channels. bottom of the network device and terminal devices.

[0025] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe may be less than or equal to a previously determined number.

[0026] Alternatively, a following subframe of the first upper link subframe may be a lower link subframe.

[0027] Alternatively, the length of the first symbol for SRS transmission from the first terminal device may be different from the length of a second symbol for lower link data transmission from the first terminal device.

[0028] Alternatively, the first indication information received from the network device by the first terminal device may further indicate a frequency domain resource for transmitting the SRS of the first terminal device.

[0029] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device may be identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[0030] Alternatively, the method may additionally include the following: transmitting, by the first terminal device, second indication information indicating the channel aging rate of the first terminal device to the network device, wherein the first indication information received from the network device by the first terminal device further indicates a position of the second symbol for transmitting the lower link data from the first terminal device.

[0031] Alternatively, the various symbols may additionally include a symbol for SRS transmission of a second terminal device, the channel aging rate of the first terminal device may be higher than the channel aging rate of the second terminal device, which first symbol for transmitting the SRS of the first terminal device may be located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device may be located before a symbol for transmitting data of the second terminal device.

[0032] Alternatively, the second indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[0033] Fifth aspect provides a terminal device, which can be configured to execute each process performed by the terminal device in the SRS transmission method according to the fourth aspect and each embodiment. The terminal device includes a receiver module and a transmitter module. The receiver module is configured to receive first indication information from a network device, wherein the first indication information indicates first symbol for SRS transmission from the first terminal device in first upper link subframe, the first upper link subframe includes several symbols for transmitting SRSs from plural terminal devices, the plural terminal devices include the first terminal device, and the plural symbols include the first symbol. The transmitter module is configured to transmit the SRS from the first terminal device to the network device on the first symbol received by the receiver module.

[0034] Sixth aspect provides a terminal device, which can be configured to execute each process performed by the terminal device in the SRS transmission method according to the fourth aspect and each embodiment. The terminal device includes a processor and a transceiver. The transceiver is configured to receive first indication information from a network device, wherein the first indication information indicates first symbol for SRS transmission from the first terminal device in first upper link subframe, the first upper link subframe includes several symbols for transmitting SRSs from plural terminal devices, the plural terminal devices include the first terminal device and the plural symbols include the first symbol, and transmitting the SRS from the first terminal device to the network device on the first symbol received by a receiving module.

[0035] Seventh aspect provides a channel SRS transmission method, which is characterized by the inclusion of the following step.

[0036] A network device receives indication information that indicates channel aging speed of a first terminal device from the first terminal device.

[0037] Alternatively, the network device may determine first symbol for SRS transmission of the first terminal device and second symbol for lower link data transmission of the first terminal device according to the channel aging speed.

[0038] The network device can obtain the channel aging speed of the first terminal device according to second indication information, so that the system transmission resource can be reasonably configured according to the channel aging speed for implement programming on the terminal device and the like.

[0039] Alternatively, the channel aging rate of the first terminal device may be higher than the channel aging rate of a second terminal device, the first symbol for transmitting the SRS of the first terminal device may be located after the symbol for transmission of the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device may be located before a symbol for transmitting lower link data of the second terminal device.

[0040] As the network device can configure a resource for transmitting the SRS and a resource for transmitting the downlink data to the terminal device according to the channel aging speed of the terminal device, the resources can be reasonably utilized and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[0041] Alternatively, the indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[0042] Eighth aspect provides a network device that can be configured to perform each process performed by the network device in the SRS transmission method according to the seventh aspect and each embodiment. The network device includes a receiver module. The receiver module is configured to receive, from the first terminal device, indication information indicating channel aging speed of a first terminal device.

[0043] Ninth aspect provides a network device that can be configured to perform each process performed by the network device in the SRS transmission method in accordance with the seventh aspect and each embodiment. The network device includes a processor and a transceiver. The transceiver is configured to receive, from the first terminal device, indication information indicating channel aging speed of a first terminal device.

[0044] Tenth aspect provides a method of transmitting channel SRS, which is characterized by including: transmission, by a first terminal device, of indication information indicating channel aging speed from a first terminal device to a network.

[0045] The first terminal device transmits its own channel aging speed to the network device, in order to allow the network device to obtain the channel aging speed of the first terminal device according to the second indication information, so that the system transmission resource can be reasonably configured according to the aging speed of channels to implement programming on the terminal device and the like.

[0046] Alternatively, the channel aging rate of the first terminal device may be higher than the channel aging rate of a second terminal device, the first symbol for SRS transmission of the first terminal device may be located after the symbol for SRS transmission of the second terminal device and second symbol for lower link data transmission of the first terminal device may be located before a symbol for lower link data transmission of the second terminal device.

[0047] How the terminal device transmits its own channel aging speed to the network device in order to allow the network device to configure a resource for transmitting the SRS and a resource for transmitting the downlink data to the device terminal, resources can be reasonably utilized and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[0048] Alternatively, the indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[0049] Eleventh aspect provides a terminal device, which can be configured to execute each process performed by the terminal device in the SRS transmission method according to the tenth aspect and each embodiment. The terminal device includes a transmitter module. The transmitter module is configured to transmit indication information indicating aging speed of channels from a first terminal device to a network device.

[0050] Twelfth aspect provides a terminal device, which can be configured to execute each process performed by the terminal device in the SRS transmission method according to the tenth aspect and each embodiment. The terminal device includes a processor and a transceiver. The transceiver is configured to transmit indication information indicating channel aging speed from a first terminal device to a network device.

[0051] Thirteenth aspect provides a computer-readable storage medium that stores a program, wherein the program allows a network device to perform any data transmission method in accordance with the first aspect and each of its realizations .

[0052] Fourteenth aspect provides a computer-readable storage medium that stores a program, wherein the program allows a terminal device to perform any data transmission method in accordance with the fourth aspect and each of its realizations.

[0053] Fifteenth aspect provides a computer-readable storage medium that stores a program, wherein the program allows a network device to perform any data transmission method in accordance with the seventh aspect and each of its realizations .

[0054] Sixteenth aspect provides a computer-readable storage medium that stores a program, wherein the program allows a network device to perform any data transmission method in accordance with the tenth aspect and each of its realizations .

Brief Description of Figures

[0055] In order to more clearly describe the technical solutions of the embodiments of the present invention, the drawings necessary for use in the embodiments of the present invention will simply be presented below. It is clear that the drawings described below are only some embodiments of the present invention. Other drawings may additionally be obtained by those of ordinary skill in the art according to the figures without creative work.

[0056] Fig. 1 illustrates a schematic architectural diagram of an application scenario in accordance with an embodiment of the present invention.

[0057] Fig. 2 illustrates a schematic diagram on channel aging and coherence time according to the state of the art.

[0058] Fig. 3 illustrates a schematic diagram of SRS transmission according to the state of the art.

[0059] Fig. 4 illustrates an interaction flowchart of an SRS transmission method in accordance with an embodiment of the present invention.

[0060] Fig. 5 illustrates a schematic diagram of an SRS transmission method in accordance with an embodiment of the present invention.

[0061] Fig. 6 illustrates a schematic diagram of an SRS transmission symbol and a data transmission symbol in accordance with an embodiment of the present invention.

[0062] Fig. 7 illustrates a schematic diagram of an SRS resource and a data resource in accordance with an embodiment of the present invention.

[0063] Fig. 8 illustrates a schematic diagram of an SRS resource and a data resource in accordance with an embodiment of the present invention.

[0064] Fig. 9 illustrates an interaction flowchart of an SRS transmission method according to another embodiment of the present invention.

[0065] Fig. 10 illustrates a structural block diagram of a network device in accordance with an embodiment of the present invention.

[0066] Fig. 11 illustrates a structural block diagram of a network device in accordance with an embodiment of the present invention.

[0067] Fig. 12 illustrates a schematic structural diagram of a system chip according to another embodiment of the present invention.

[0068] Fig. 13 illustrates a structural block diagram of a terminal device according to an embodiment of the present invention.

[0069] Fig. 14 illustrates a structural block diagram of a terminal device according to an embodiment of the present invention.

[0070] Fig. 15 illustrates a schematic structural diagram of a system chip according to another embodiment of the present invention.

[0071] Fig. 16 illustrates a structural block diagram of a network device according to another embodiment of the present invention.

[0072] Fig. 17 illustrates a structural block diagram of a network device according to another embodiment of the present invention.

[0073] Fig. 18 illustrates a schematic structural diagram of a system chip according to another embodiment of the present invention.

[0074] Fig. 19 illustrates a structural block diagram of a terminal device according to another embodiment of the present invention.

[0075] Fig. 20 illustrates a structural block diagram of a terminal device according to another embodiment of the present invention.

[0076] Fig. 21 illustrates a schematic structural diagram of a system chip according to another embodiment of the present invention.

Detailed Description of the Invention

[0077] The technical solutions of the embodiments of the present invention will be clearly and completely described below in combination with the figures in the embodiments of the present invention. It is clear that the described embodiments are not all embodiments, but part of the embodiments of the present invention. All other achievements obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0078] It should be understood that the technical solutions of the embodiments of the present invention can be applied to various communication systems, such as a current Global System for Mobile Communications (GSM) communication system, Code Division Multiple Access system (CDMA), Broadband Code Division Multiple Access (WCDMA) system, General Packet Radio Service (GPRS), LTE system, Universal Mobile Telecommunications System (UMTS) and similar, and are particularly applied to a 5G system future.

[0079] In the embodiments of the present invention, the terminal device may also be User Equipment (UE), access terminal, user unit, user station, mobile station, mobile radio station, remote station, remote terminal, mobile device , user terminal, terminal, wireless communication device, user agent or user device. The access terminal may be cellular telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Circuit (WLL) station, Personal Digital Assistant (PDA), handheld device with wireless communication function, computing device, other processing device connected to a wireless modem, vehicle-mounted device, wearable device, terminal device in a future 5G network, terminal device in a future evolved Public Land Mobile Network (PLMN), or the like.

[0080] In embodiments of the present invention, the network device may be a device configured to communicate with the terminal device. The network device can be a Base Transceiver Station (BTS) in GSM or CDMA, it can also be a Node B (NB) in the WCDMA system, it can also be an Evolutionary Node B (eNB or eNode B) in the LTE system and it can also be be a wireless controller in a Cloud Radio Access Network (CRAN) scenario. Alternatively, the network device may be a relay station, access point, vehicle-mounted device, wearable device, network device in the future 5G communication network, network device in the future evolved PLMN, or the like.

[0081] Fig. 1 illustrates a schematic architectural diagram of an application scenario in accordance with an embodiment of the present invention. A basic network architecture of a communication system illustrated in Fig. 1 may include a network device, such as eNode B, and at least one terminal device, such as UE 20, UE 30, UE 40, UE 50, UE 60 , UE 70, UE 80 and UE 90. Each of the UEs 20 to 90 and the eNode B 10 may include at least one antenna. As illustrated in Fig. 3, eNode B 10 is configured to provide a communication service to at least one of UEs 20 to 90 for access to a core network. The UEs 20 to 90 seek a synchronization signal, broadcast signal and the like transmitted by the eNode B 10 for access to the network, in order to communicate with the network. At least one of the UEs 20 to 90 may, for example, perform data transmission with the eNode B 10 based on non-codebook closed-loop MIMO technology based on uplink/downlink channel reciprocity. This means that eNode B 10 obtains CSI in advance through upper link channel estimation and uses CSI for lower link precoding or beamforming transmission.

[0082] The network according to embodiments of the present invention may indicate PLMN or Device to Device (D2D) network, Machine to Machine/Human (M2M) network or other network. Fig. 1 illustrates just one example of an application scenario in accordance with embodiments of the present invention. Embodiments of the present invention can also be applied to other scenarios. Furthermore, Fig. 1 is just an example of a simplified schematic diagram. The network may additionally include another network device that is not shown in Fig. 1.

[0083] The solutions described in the present invention can be applied to a non-codebook closed-loop MIMO scenario based on the reciprocity of upper link and lower link channels. Compared with closed-loop MIMO transmission based on codebook feedback, non-codebook closed-loop MIMO transmission can obtain more accurate CSI than that obtained through a codebook feedback method and sustains formation narrow beam systems of massive MIMO and Multi-User MIMO (MU-MIMO) involving massive terminals. Furthermore, massive upper link signaling caused by massive lower link CSI Reference Signals (CSI-RSs) and codebook feedback in massive MIMO can be avoided. One can also avoid huge overhead link overflow caused by MU-MIMO involving massive terminals, for example, for SRSs.

[0084] There are, however, many technical problems for closed-loop MIMO transmission based on reciprocity of upper link and lower link channels in 5G system, such as the channel aging problem and the limit problem for the number of SRSs.

[0085] The feasibility of closed-loop MIMO depends on channel coherence. This means that the hypothesis can be formulated that the channel does not obviously age in channel coherence time and the channel measurement result obtained at a previous time can be adopted for precoding/beamforming at a next time. If the delay in obtaining CSI for data transmission exceeds the channel coherence time, however, the problem of channel aging may occur.

[0086] Fig. 2 illustrates a schematic diagram about channel aging and coherence time. For eNode B 10 and UE 20 of Fig. 1 and for SRS, for example, the non-codebook closed-loop MIMO transmission process based on reciprocity of uplink and downlink channels includes the following steps .

[0087] At 201, eNode B 10 transmits SRS request to UE 20.

[0088] At 202, the UE 20 receives the SRS request from eNode B 10 at 201 and transmits SRS to eNode B 10.

[0089] At 203, eNode B 10 performs channel estimation according to the received SRS to obtain CSI.

[0090] At 204, eNode B 10 performs precoding design for lower link transmission in accordance with CSI.

[0091] At 205, eNode B 10 transmits programming command and/or data to UE 20.

[0092] At 206, eNode B 10 transmits next SRS request to UE 20.

[0093] At 207, the UE 20 receives the SRS request from eNode B 10 at 206 and transmits SRS for the SRS request to eNode B 10.

[0094] The period of time between two adjacent moments when the UE 20 transmits the SRSs to the eNode B 10 can be called coherence time. If the delay in obtaining CSI from eNode B 10 in 203 exceeds the coherence time of the channel, the problem of channel aging (alternatively called channel aging) may occur.

[0095] As the channel aging effect of a 4G system is not that serious, the delays between an SRS, codebook feedback and signal transmission of an LTE system may not exceed a channel's coherence time, even though are relatively long. The LTE system is not particularly optimized, therefore, to reduce channel measurement delay for data transmission. For periodic SRS or aperiodic SRS, the SRS is configured only on one last symbol of each upper link subframe. Fig. 3 illustrates a schematic diagram of upper link data transmission according to the prior art. Only one symbol in each upper link subframe of a 4G system is adopted to transmit SRS. Fig. 3 illustrates SRS transmission conditions of two conditions of a non-frequency hopping mode and a frequency hopping mode. Under both conditions, one last symbol of each upper link subframe is used to transmit SRS.

[0096] Fig. 4 illustrates an interaction flowchart of an SRS transmission method in accordance with an embodiment of the present invention. First terminal device and network device are illustrated in Fig. 4. The first terminal device can be, for example, any terminal device from UE 20 to UE 90 illustrated in Fig. 1 and the network device can be eNode B 10 illustrated in Fig. 1. As illustrated in Fig. 4, the specific flow of the SRS transmission method includes the following steps.

[0097] At 410, the network device determines several transmission symbols of SRSs in the first upper link subframe.

[0098] Various symbols can be used to transmit SRSs from various terminal devices.

[0099] Furthermore, each symbol among the various symbols can be used to transmit the SRS of a terminal device.

[00100] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe is less than or equal to a previously determined number.

[00101] Additionally, the first upper link subframe is followed by a lower link subframe.

[00102] This means that the network device can configure the various symbols to transmit the SRSs of the various terminal devices in a last upper link subframe, i.e. the first upper link subframe, before an upper link switching point to lower link from an upper link subframe to a lower link subframe. The SRS may be, for example, a channel SRS.

[00103] At 420, the network device transmits first indication information to the first terminal device.

[00104] The first indication information indicates first symbol for SRS transmission of the first terminal device in the first upper link subframe. The first upper link subframe includes the various symbols for transmitting the SRSs of the various terminal devices. The various terminal devices include the first terminal device. The various symbols include the first symbol.

[00105] In other words, the first indication information is configured to instruct the first terminal device to transmit the SRS on the first symbol among the plural symbols.

[00106] Specifically, the network device may indicate a symbol position for transmitting the SRS to the first terminal device, that is, indicate the specific symbol in which the first terminal device transmits the SRS in the various symbols, through the first information indication.

[00107] In fact, the network device transmits the first indication information to each terminal device among the various terminal devices. The first indication information indicates the symbol corresponding to each terminal device among the various symbols. The first terminal device among the several terminal devices corresponds to the first symbol among the several symbols. The first symbol is used to transmit the SRS of the first terminal device. In carrying out the present invention, descriptions are made with the network device and the first terminal device as an example.

[00108] Alternatively, the first indication information may arise from control signaling.

[00109] At 430, the first terminal device receives the first indication information from the network device.

[00110] The first indication information indicates the position of the first symbol for transmitting the SRS of the first terminal device in the first upper link subframe. The first upper link subframe includes the various symbols for transmitting the SRSs.

[00111] At 404, the first terminal device transmits the SRS of the first terminal device to the network device in the first symbol.

[00112] Fig. 5, for example, illustrates a schematic diagram of an SRS transmission method in accordance with an embodiment of the present invention. The first upper link subframe includes the various symbols for transmitting various SRSs, and the next subframe after the first upper link subframe is a lower link subframe. The network device may transmit lower link control signaling to indicate the specific symbol among the plurality of symbols for each terminal device among the plurality of terminal devices to transmit the SRS. As illustrated in Fig. 5, for example, the network device instructs the first terminal device to adopt a symbol 1 (i.e., the first symbol) to transmit the SRS, instructs a second terminal device to adopt a symbol 2 to transmit SRS and instructs a third terminal device to adopt a 3 symbol to transmit SRS. Since all symbols adopted by the first terminal device, the second terminal device and the third terminal device to transmit the SRSs are located in the first upper link subframe, the reliability of the CSI determined by the network device according to the SRSs is high. This means that a channel state determined by the network device according to the SRSs of the three end devices most closely approximates a channel state when the three end devices transmit downlink data.

[00113] It should be understood that the various symbols for transmitting the various SRSs in the first upper link subframe can be found in any positions of the first upper link subframe. Preferably, the various symbols for transmitting the SRSs are distributed in positions close to the upper link to lower link switching point of the upper link subframe to the lower link subframe. As illustrated in Fig. 5, the first symbol configured for the first terminal device to transmit the SRS, the second symbol configured for the second terminal device to transmit the SRS, and the third symbol configured for the third terminal device to transmit the SRS are distributed sequentially at positions adjacent to the upper link to lower link switching point of the upper link subframe to the lower link subframe.

[00114] If the SRS is closer to the upper link to lower link switching point of the upper link subframe to the lower link subframe, the symbol that transmits the SRS is closer to a symbol that transmits lower link data in a time domain, the network device can obtain more accurate CSI using channel reciprocity, and the channel state obtained by the network device is closer to the channel state when the lower link data is transmitted.

[00115] In an existing 4G system, only one symbol in a subframe can be used to transmit SRS and the last upper link subframe, i.e. the first upper link subframe, before the upper link to link switching point from the upper link subframe to the lower link subframe cannot be fully utilized. Lower Link Control Information (DCI) and a System Information Block (SIB) can therefore only indicate the specific subframe that transmits the SRS and may not indicate the specific symbol that transmits the SRS in the subframe.

[00116] In carrying out the present invention, the network device determines the various symbols for transmitting the SRSs in the first upper link subframe, so that the channel state determined by the network device according to the SRSs is closest to the state When lower link data is transmitted, the influence caused by channel aging is reduced in a transmission process based on the reciprocity of upper link and lower link channels and the transmission efficiency and accuracy of link precoding bottom and beamforming are improved by fully utilizing channel reciprocity.

[00117] In another embodiment, the length of the first symbol for transmission of the SRS according to the first terminal device is different from the length of a second symbol for transmission of lower link data from the first terminal device.

[00118] Specifically, in the existing 4G system, a unified symbol length is adopted for carrier, and the same symbol length is adopted for a symbol for SRS transmission and for a symbol for downlink data transmission. Different symbol lengths can be adopted for the symbol for transmitting the SRS and for the symbol for transmitting the lower link data. Physical layer parameters related to SRS can be optimized independently; one can, for example, adopt shorter symbol length for the SRS so that it contains more symbols for transmitting SRSs in a unit of time, so that the time domain allocation granularity of SRSs is reduced to achieve flexibility allocation of resources for transmission of SNSs.

[00119] Fig. 6, for example, illustrates a schematic diagram of an SRS transmission symbol and a lower link data transmission symbol. The length of the first symbol for transmitting the SRS of the first terminal device is different from the length of the second symbol for transmitting the lower link data of the first terminal device. Since the length of the symbol transmitting the SRS is shorter than the length of the symbol transmitting the lower link data, the first upper link subframe may contain more symbols for transmitting SRSs and SRS of more terminal devices may also be transmitted in the first upper link subframe.

[00120] In another embodiment, the SRS transmission method further includes the following: determining, by the network device, a frequency domain resource for transmitting the SRS from the first terminal device. The first indication information transmitted to the first terminal device by the network device at 420 further indicates the frequency domain capability for transmitting the SRS of the first terminal device.

[00121] This means that the network device can dynamically configure a time domain resource and a frequency domain resource adopted when the terminal transmits the SRS through lower link physical layer control signaling. Configuration about the time domain feature includes the symbol configured for the first terminal device to transmit the SRS. Configuration about the frequency domain resource includes the frequency domain resource configured for the first terminal device to transmit the SRS, such as a Resource Block (RB).

[00122] Specifically, in the existing 4G system, a base station semi-statically configures a resource that transmits SRS via Radio Resource Control (RRC) signaling. The base station can activate aperiodic SRS through an SRS request in lower link physical layer control signaling, but it can only activate the SRS transmission feature in accordance with the RRC signaling, it may not directly configure the aperiodic SRS feature. transmission of SRS and may not dynamically regulate a frequency domain resource to transmit SRS in a frequency domain, so that many unnecessary resources may be occupied to cause waste of resources and the transmission of SRS from massive terminal devices in the same band of frequencies in 5G massive MIMO technology may not be sustained. In the embodiment, the network device may adopt physical layer control signaling to dynamically configure the time and frequency domain resources to transmit the SRSs, and the network device may configure the symbol to transmit the SRS in the first upper link subframe. in the time domain and can control the frequency domain resource to transmit the SRS in a certain transmission bandwidth, for example, configuring RB to transmit the corresponding SRS to each terminal device in the frequency domain. In this way, fewer transmission resources can be occupied for transmitting SRSs, and when the network device obtains CSI based on channel reciprocity, many resources occupied by SRS transmission of terminal devices can be saved.

[00123] In another embodiment, a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[00124] Specifically, the network device may simultaneously configure the facility for the first terminal to transmit the SRS and a facility for the terminal to transmit the lower link data via the same lower link physical layer control signaling. A frequency domain resource configured for the first endpoint device to transmit the SRS and a frequency domain resource configured for the first endpoint device to transmit downlink data are the same frequency domain resource. In the existing 4G system, the configuration about the resource for SRS transmission and the configuration about the resource for transmitting the lower link data, which are performed by the network device, are not associated. While carrying out the present invention, the facility for transmitting the SRS and the facility for transmitting the lower link data can be configured simultaneously in the same control signaling. A resource indication field is adopted, for example, to configure the resource for SRS transmission and the resource for transmission of lower link data. You can therefore reduce unnecessary overhead signage.

[00125] In the embodiment, when the network device obtains CSI based on channel reciprocity and transmits the lower link data in accordance with the CSI, the resource for transmitting the SRS and the resource for transmitting the lower link data may adopt the same frequency domain feature. Since the system can perform frequency selective programming function through periodic SRS, the channel reciprocity SRS may not need to be transmitted in a wider frequency range.

[00126] Fig. 7 illustrates a schematic diagram of an SRS resource and a data resource. The control signaling transmitted by the network device at 420 may simultaneously indicate the resource configured for the terminal device to transmit the SRS and the resource that receives the downlink data. The frequency domain SRS transmission capability and the frequency domain lower link data receiving capability of the same terminal device may be identical. The first terminal device transmits the SRS of the first terminal device in the first symbol, for example, and the network device transmits the lower link data from the first terminal device to the first terminal device in the frequency domain resource adopted by the first terminal device to transmit the SRS. The second terminal device transmits the SRS of the second terminal device in the second symbol and the network device transmits the lower link data of the second terminal device to the second terminal device in frequency domain resource adopted by the second terminal device to transmit the SRS. The third terminal device transmits the SRS of the third terminal device in the third symbol and the network device transmits downlink data from the third terminal device to the third terminal device in frequency domain resource adopted by the third terminal device to transmit the SRS.

[00127] In another embodiment, before the operation of transmitting, by the network device, control signaling to the first terminal device, that is, before 420, the SRS transmission method additionally includes 450 to 470.

[00128] At 450, the first terminal device transmits second indication information to the network device, wherein the second indication information indicates channel aging speed of the first terminal device.

[00129] At 460, the network device receives the second indication information from the first terminal device.

[00130] At 470, the network device determines second symbol for lower link data transmission of the first terminal device according to the channel aging speed indicated by the second indication information.

[00131] In this case, the control signaling transmitted to the terminal device by the network device at 420 optionally further indicates a position of the second symbol configured to receive the lower link data from the first terminal device.

[00132] Alternatively, the indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[00133] The speed level may indicate a series of speed levels divided by the network device or terminal device for different channel aging speeds. The aging speed level can also be determined in advance by the terminal device and the network device. The terminal device can determine its own corresponding channel aging level according to its own channel aging speed and report it to the network device through the indication information.

[00134] Specifically, each terminal device reports information about its own channel aging speed to the network device and the network device may indicate symbol positions for transmitting the SRSs of the terminal devices and second symbols for transmitting downlink data of the terminal devices. terminal devices in the various symbols to transmit the SRSs in the first upper link subframe to different terminals according to the channel aging speeds of different terminal devices. The first terminal device may, for example, transmit the second indication information, which indicates the channel aging speed of the first terminal device to the network device via upper link control signaling, and the network device configures the resource. for transmitting the SRS and the facility for transmitting the lower link data to the first terminal device according to the second indication information reported by the first terminal device.

[00135] The manner in which the network device configures a feature for transmitting SRS and a feature for transmitting downlink data to a terminal device in accordance with indication information indicating the channel aging speed of the terminal device will be described below in combination with the schematic diagram of an SRS resource and a data resource in Fig. 8 with two terminal devices, such as the first terminal device and the second terminal device, for example, in detail.

[00136] In another embodiment, the various symbols, determined by the network device at 410, in the first upper link subframe include a symbol for SRS transmission from a second terminal device. If the channel aging speed of the first terminal device is higher than the channel aging speed of the second terminal device, the first symbol for SRS transmission of the first terminal device is located after the symbol for SRS transmission of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00137] Specifically, the time when the terminal device transmits the SRS and the time when the corresponding downlink data is received need to be as close as possible. If the channel aging speed of the terminal device is higher, the SRS and data must come closer together to keep up with the channel aging. There are, however, limited near symbol resources and lower link data transmission channel resources in the first upper link subframe, and the network device, if it does not master the channel aging speed information of the terminal device, cannot utilize these precious resources efficiently to implement optimal resource configuration. In the embodiment, the terminal device transmits the indication information indicating its own channel aging speed to the network device, and then the network device can dominate the terminals with relatively high channel aging speeds and the terminals with relatively low channel aging speeds, so as to preferentially schedule SRS transmission symbol resources and lower link data transmission channel resources more favorable to achieve channel reciprocity for the terminal devices with relatively low channel aging speeds. high. The terminal device may determine, for example, its own channel aging rate by means of channel measurement information from downlinks, changing Global Positioning System (GPS) coordinates, changing attitude of the terminal device, and the like, and report them to the network device.

[00138] It should be understood that the SRS according to the embodiment of the present invention may include channel SRS and may also include another SRS. There are no limits in the present.

[00139] Based on the solutions of the embodiment of the present invention, the influence caused by channel aging can be reduced in the transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[00140] Fig. 9 illustrates an interaction flowchart of an SRS transmission method according to another embodiment of the present invention. First terminal device and network device are illustrated in Fig. 9. The first terminal device can be, for example, any terminal device from UE 20 to UE 90 illustrated in Fig. 1 and the network device can be eNode B 10 illustrated in Fig. 1. As illustrated in Fig. 9, the specific flow of the SRS transmission method includes the following steps.

[00141] At 910, the first terminal device determines second indication information, wherein the second indication information indicates channel aging speed of the first terminal device.

[00142] At 920, the first terminal device transmits the second indication information to the network device.

[00143] At 930, the network device receives the second indication information from the first terminal device.

[00144] The network device can obtain the channel aging speed of the first terminal device according to the second indication information, so that the system transmission resource can be reasonably configured according to the channel aging speed for implement programming on the terminal device and the like.

[00145] Alternatively, the method additionally includes 940.

[00146] At 940, the network device determines first symbol for SRS transmission of the first terminal device and second symbol for lower link data transmission of the first terminal device according to the channel aging speed indicated by the second indication information .

[00147] Alternatively, the indication information may include the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[00148] The speed level may indicate a series of speed levels divided by the network device or terminal device for different channel aging speeds. The aging speed level can also be determined in advance by the terminal device and the network device. The terminal device can determine its own corresponding channel aging level according to its own channel aging speed and report it to the network device through the indication information.

[00149] Specifically, each terminal device reports information about its own channel aging speed to the network device, and the network device may indicate symbol positions for transmitting SRSs from the terminal devices and second symbols for transmitting downlink data from the terminal devices. terminal devices in the various symbols to transmit the SRSs in first upper link subframe to different terminals according to the channel aging speeds of different terminal devices. The first terminal device may, for example, transmit the second indication information, which indicates the channel aging speed of the first terminal device to the network device via upper link control signaling, and the network device configures a resource for transmitting the SRS and a facility for transmitting the lower link data to the first terminal device according to the second indication information reported by the first terminal device.

[00150] As the network device can configure the resource for transmitting the SRS and the resource for transmitting the downlink data to the terminal device according to the channel aging speed of the terminal device, the resources can be reasonably utilized and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[00151] It should be understood that, in carrying out the present invention, if it is necessary to occupy several symbols for transmitting the lower link data from the first terminal device, the second symbol, mentioned herein, configured to transmit the lower link data bottom of the first terminal device may designate a start symbol among the plurality of symbols for transmitting the bottom link data of the first terminal device and the lengths of the symbols transmitting the bottom link data after the start symbol and the length of the start symbol are identical and all adopt a data symbol length. The length of the data symbol may be identical or different from the length of the first symbol for SRS transmission of the first terminal device. If only one symbol is occupied for transmission of lower link data from the first terminal device, the second symbol is the symbol.

[00152] In another embodiment, the channel aging rate of the first terminal device is higher than the channel aging rate of a second terminal device, the first symbol for transmitting the SRS of the first terminal device is located after the symbol for SRS transmission of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00153] Specific descriptions in 910 to 940 according to the embodiment may designate descriptions of 450 to 470 and, for simplicity, will not be detailed herein.

[00154] In the embodiment, as the network device can configure the resource for transmitting the SRS and the resource for transmitting the downlink data to the terminal device according to the channel aging speed of the terminal device, the resources can be reasonably used, and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[00155] It should be understood that, in various embodiments of the present invention, the magnitude of a numerical sequence of each process does not indicate an execution sequence, the execution sequence of each process should be determined by its function and internal logic and not shall form a limit for the processes of implementing the embodiments of the present invention.

[00156] The data transmission method according to embodiments of the present invention is described in detail above. A network device and a terminal device in accordance with embodiments of the present invention will be described below. It should be understood that the network device and the terminal device according to the embodiments of the present invention can perform various methods in the above-mentioned embodiments of the present invention. This means that the specific work process of each following device can designate the corresponding process in the method realizations.

[00157] Fig. 10 illustrates a schematic block diagram of a network device 1000 in accordance with an embodiment of the present invention. As illustrated in Fig. 10, the network device 1000 includes a determination module 1001 and a transmitter module 1002.

[00158] The determination module 1001 is configured to determine various symbols for transmitting SRSs in the first upper link subframe.

[00159] The transmitter module 1002 is configured to transmit first indication information to each of a plurality of terminal devices, wherein the first indication information indicates the symbol corresponding to each terminal device among the plurality of symbols determined by the determination module, wherein a first terminal device among the plurality of terminal devices corresponds to the first symbol among the plurality of symbols and the first symbol is configured to transmit SRS from the first terminal device.

[00160] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe is less than or equal to a previously determined amount.

[00161] Alternatively, the first upper link subframe is followed by a lower link subframe.

[00162] Alternatively, the length of the first symbol for SRS transmission of the first terminal device is different from the length of a second symbol for lower link data transmission of the first terminal device.

[00163] Alternatively, determination module 1001 is further configured to: - determine a frequency domain resource to transmit the SRS of the first terminal device.

[00164] The first indication information transmitted to the first terminal device by the transmitter module 1002 further indicates the frequency domain capability for transmitting the SRS of the first terminal device.

[00165] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[00166] Alternatively, the network device 1000 additionally includes a receiver module 1003.

[00167] The receiver module 1003 is configured to receive, from the first terminal device, second indication information that indicates channel aging speed of the first terminal device.

[00168] Alternatively, the determination module 1001 is further configured to determine the second symbol for transmission of the lower link data of the first terminal device according to the channel aging rate, wherein the first indication information transmitted to the first terminal device by the network device additionally indicates the second symbol for transmitting the lower link data from the first terminal device.

[00169] Alternatively, the various symbols additionally include a symbol for SRS transmission of a second terminal device and the channel aging rate of the first terminal device is greater than the channel aging rate of the second terminal device.

[00170] The first symbol for transmitting the SRS of the first terminal device is located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting data link of the second terminal device.

[00171] Alternatively, the second indication information includes the magnitude of the channel aging speed of the first terminal device or the speed level corresponding to the channel aging speed of the first terminal device.

[00172] As all symbols for transmitting the SRSs of the various terminal devices are located in the first upper link subframe, the influence caused by channel aging can be reduced in a transmission process based on reciprocity of upper link and link channels. bottom of the network device and terminal devices.

[00173] It should be noted that, in carrying out the present invention, the determination module 1001 can be implemented by a processor and the transmitter module 1002 can be implemented by a transceiver. As illustrated in Fig. 10, a network device 1100 may include a processor 1110, transceiver 1120, and memory 1130. The transceiver 1120 may include a receiver 1121 and a sender 1122. The memory 1130 may be configured to store code executed by the processor 1110 and similar. Each component of the network device 1100 is coupled via a bus system 940. The bus system 1140 includes a data bus and further includes a power bus, control bus, status signal bus, and the like.

[00174] Processor 1110 is configured to determine various symbols for transmitting SRSs in first upper link subframe.

[00175] The transceiver 1120 is configured to transmit first indication information to each of a plurality of terminal devices, wherein the first indication information indicates the symbol corresponding to each terminal device among the plurality of symbols determined by a determination module, wherein a first terminal device among the plurality of terminal devices corresponds to a first symbol among the plurality of symbols and the first symbol is configured to transmit SRS from the first terminal device.

[00176] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe is less than or equal to a previously determined number.

[00177] Alternatively, the first upper link subframe is followed by a lower link subframe.

[00178] Alternatively, the length of the first symbol for SRS transmission of the first terminal device is different from the length of a second symbol for lower link data transmission of the first terminal device.

[00179] Alternatively, processor 1110 is further configured to determine a frequency domain resource for transmitting the SRS of the first terminal device.

[00180] The first indication information transmitted to the first terminal device by transceiver 1120 further indicates the frequency domain capability for transmitting the SRS of the first terminal device.

[00181] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[00182] Alternatively, transceiver 1120 is further configured to receive, from the first terminal device, second indication information indicating channel aging speed of the first terminal device.

[00183] The processor 1110 is further configured to determine the second symbol for transmitting the lower link data of the first terminal device according to the channel aging speed.

[00184] Alternatively, the various symbols additionally include a symbol for SRS transmission of a second terminal device and the channel aging rate of the first terminal device is greater than the channel aging rate of the second terminal device.

[00185] The first symbol for transmitting the SRS of the first terminal device is located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting data link of the second terminal device.

[00186] Alternatively, the second indication information includes the magnitude of the channel aging speed of the first terminal device or the speed level corresponding to the channel aging speed of the first terminal device.

[00187] Fig. 12 illustrates a schematic structural diagram of a system chip according to an embodiment of the present invention. The system chip 1200 of Fig. 12 includes an input interface 1201, output interface 1202, at least one processor 1203, and memory 1204. The input interface 1201, the output interface 1202, the processor 1203, and the memory 1204 are connected via bus 1205. Processor 1203 is configured to execute a code in memory 1204. When the code is executed, processor 1203 implements the method executed by the network device in Fig. 4 to Fig. 8.

[00188] The network device 1000 illustrated in Fig. 10, the network device 1100 illustrated in Fig. 11, or the system chip 1200 illustrated in Fig. 12 may implement each process implemented by the network device in the method embodiments of Fig. 4 to Fig. 8. No further details will be presented here to avoid repetition.

[00189] Fig. 13 illustrates a schematic block diagram of a terminal device 1300 in accordance with an embodiment of the present invention. As illustrated in Fig. 13, the terminal device 1300 includes a receiver module 1301 and a transmitter module 1302.

[00190] The receiver module 1301 is configured to receive first indication information from a network device, wherein the first indication information indicates first symbol for SRS transmission from the first terminal device in first upper link subframe, the first subframe of top link includes multiple symbols for transmitting SRSs from multiple terminal devices, the multiple endpoint devices include the first terminal device, and the multiple symbols include the first symbol.

[00191] The transmitter module 1302 is configured to transmit the SRS from the first terminal device to the network device on the first symbol received by the receiver module 1301.

[00192] As all transmission symbols of the SRSs of the various terminal devices are located in the first upper link subframe, the influence caused by channel aging can be reduced in a transmission process based on reciprocity of upper link and link channels. bottom of the network device and terminal devices.

[00193] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe is less than or equal to a previously determined number.

[00194] Alternatively, the first upper link subframe is followed by a lower link subframe.

[00195] Alternatively, the length of the first symbol for SRS transmission of the first terminal device is different from the length of a second symbol for lower link data transmission of the first terminal device.

[00196] Alternatively, the first indication information received from the network device by the first terminal device further indicates a frequency domain resource for transmitting the SRS of the first terminal device.

[00197] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[00198] Alternatively, the transmitter module 1302 is further configured to transmit second indication information that indicates the channel aging rate of the first terminal device to the network device, wherein the first indication information received from the network device by the module receiver 1301 further indicates a position of the second symbol for transmitting the lower link data from the first terminal device.

[00199] Alternatively, the various symbols additionally include a symbol for SRS transmission from a second terminal device, the channel aging rate of the first terminal device is higher than the channel aging rate of the second terminal device, the first symbol for transmitting the SRS of the first terminal device is located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00200] Alternatively, the second indication information includes the magnitude of the channel aging speed of the first terminal device or the speed level corresponding to the channel aging speed of the first terminal device.

[00201] It should be noted that, in carrying out the present invention, the receiver module 1301 and the transmitter module 1302 can be implemented by a transceiver. As illustrated in Fig. 14, a terminal device 1400 may include a processor 1410, transceiver 1420, and memory 1430. The transceiver 1420 may include a receiver 1421 and a sender 1422. The memory 1430 may be configured to store code executed by the processor 1410 and similar. Each component of the terminal device 1400 is coupled via a bus system 1440. The bus system 1440 includes a data bus and further includes a power bus, control bus, status signal bus, and the like.

[00202] Transceiver 1420 is configured to receive first indication information from a network device, wherein the first indication information indicates first symbol for SRS transmission from the first terminal device in first upper link subframe, the first upper link subframe top includes various symbols for transmitting SRSs from various terminal devices, the various terminal devices include the first terminal device and the various symbols include the first symbol, and transmitting the SRS from the first terminal device to the network device in the first symbol received by a receiver module.

[00203] Alternatively, the number of subframes between the first upper link subframe and first lower link subframe after the first upper link subframe is less than or equal to a previously determined number.

[00204] Alternatively, the first upper link subframe is followed by a lower link subframe.

[00205] Alternatively, the length of the first symbol for SRS transmission of the first terminal device is different from the length of a second symbol for lower link data transmission of the first terminal device.

[00206] Alternatively, the first indication information received from the network device by the first terminal device further indicates a frequency domain resource for transmitting the SRS of the first terminal device.

[00207] Alternatively, a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first terminal device.

[00208] Alternatively, the transceiver 1420 is further configured to transmit second indication information that indicates the channel aging rate of the first terminal device to the network device, wherein the first indication information received from the network device by a module receiver 1301 further indicates a position of the second symbol for transmitting the lower link data from the first terminal device.

[00209] Alternatively, the various symbols additionally include a symbol for SRS transmission from a second terminal device, the channel aging rate of the first terminal device is higher than the channel aging rate of the second terminal device, the first symbol for transmitting the SRS of the first terminal device is located after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00210] Alternatively, the second indication information includes the magnitude of the channel aging speed of the first terminal device or the speed level corresponding to the channel aging speed of the first terminal device.

[00211] Fig. 15 illustrates a schematic structural diagram of a system chip in accordance with an embodiment of the present invention. The system chip 1500 of Fig. 15 includes an input interface 1501, output interface 1502, at least one processor 1503, and memory 1504. The input interface 1501, the output interface 1502, the processor 1503, and the memory 1504 are connected via bus 1505. Processor 1503 is configured to execute a code in memory 1504. When the code is executed, processor 1503 implements the method executed by the terminal device in Fig. 4 to Fig. 8.

[00212] The terminal device 1300 illustrated in Fig. 13, the terminal device 1400 illustrated in Fig. 14, or the system chip 1500 illustrated in Fig. 15 can implement each process implemented by the terminal device in the method embodiments of Fig. 4 to Fig. 8. No further details will be presented here to avoid repetition.

[00213] Fig. 16 illustrates a schematic block diagram of a network device 1600 in accordance with an embodiment of the present invention. As illustrated in Fig. 16, network device 1600 includes a receiver module 1601 configured to receive, from the first terminal device, indication information indicating channel aging rate of a first terminal device.

[00214] Alternatively, the network device 1600 additionally includes a determination module 1602, configured to determine first symbol for SRS transmission of the first terminal device and second symbol for lower link data transmission of the first terminal device according to the speed of channel aging.

[00215] Alternatively, the channel aging rate of the first terminal device is greater than the channel aging rate of a second terminal device, the first symbol for SRS transmission of the first terminal device is located after a symbol for SRS transmission of the second terminal device and the second symbol for transmitting lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00216] Alternatively, the indication information includes magnitude of the channel aging speed of the first terminal device or the speed level corresponding to the channel aging speed of the first terminal device.

[00217] As the network device can configure the resource configured to transmit the SRS and the resource to transmit the lower link data to the terminal device according to the channel aging speed of the terminal device, the resources can be reasonably utilized and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[00218] It should be noted that, in carrying out the present invention, the receiver module 1701 and the determination module 1702 can be implemented by a transceiver. As illustrated in Fig. 17, a network device 1700 may include a processor 1710, transceiver 1720, and memory 1730. The transceiver 1720 may include a receiver 1721 and a sender 1722. The memory 1730 may be configured to store code executed by the processor 1710 and similar. Each component of the network device 1700 is coupled via a bus system 1740. The bus system 1740 includes a data bus and further includes a power bus, control bus, status signal bus, and the like.

[00219] Transceiver 1720 is configured to receive, from the first terminal device, indication information indicating channel aging speed of a first terminal device.

[00220] Alternatively, processor 1710 is configured to determine first symbol for SRS transmission from the first terminal device and second symbol for lower link data transmission from the first terminal device in accordance with the channel aging rate received by transceiver 1720.

[00221] Alternatively, the channel aging rate of the first terminal device is greater than the channel aging rate of a second terminal device, the first symbol for SRS transmission of the first terminal device is located after a symbol for SRS transmission of the second terminal device and the second symbol for transmitting lower link data of the first terminal device is located before a symbol for transmitting lower link data of the second terminal device.

[00222] Alternatively, the indication information includes magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[00223] Fig. 18 illustrates a schematic structural diagram of a system chip in accordance with an embodiment of the present invention. The system chip 1800 of Fig. 18 includes an input interface 1801, output interface 1802, at least one processor 1803, and memory 1804. The input interface 1801, the output interface 1802, the processor 1803, and the memory 1804 are connected via bus 1805. Processor 1803 is configured to execute a code in memory 1804. When the code is executed, processor 1803 implements the method executed by the network device in Fig. 9.

[00224] The network device 1600 illustrated in Fig. 16, the network device 1700 illustrated in Fig. 17, or the system chip 1800 illustrated in Fig. 18 can implement each process implemented by the network device in realizing the method of Fig. 8. No further details will be presented here to avoid repetition.

[00225] Fig. 19 illustrates a schematic block diagram of a terminal device 1900 in accordance with an embodiment of the present invention. As illustrated in Fig. 19, the network device 1900 includes a transmitter module 1901 configured to transmit indication information indicating channel aging speed from a first terminal device to a network device.

[00226] Alternatively, the channel aging rate of the first terminal device is greater than the channel aging rate of a second terminal device, the first symbol for SRS transmission of the first terminal device is located after a symbol for SRS transmission of the second terminal device and the second symbol for lower link data transmission of the first terminal device is located before a symbol for lower link data transmission of the second terminal device.

[00227] Alternatively, the indication information includes magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[00228] How the terminal reports its own channel aging speed to the network device in order to allow the network device to configure a resource for transmitting the SRS and a resource for transmitting the lower link data to the terminal device of According to the channel aging speed of the terminal device, resources can be reasonably utilized and the influence caused by channel aging can be reduced in a transmission process based on the reciprocity of upper link and lower link channels of the network device and the terminal device.

[00229] It should be noted that, in carrying out the present invention, the receiver module 2001 and the transmitter module 2002 can be implemented by a transceiver. As illustrated in Fig. 20, a terminal device 2000 may include a processor 2010, transceiver 2020, and memory 2030. The transceiver 2020 may include a receiver 2021 and a sender 2022. The memory 2030 may be configured to store code executed by the processor 2010 and similar. Each component of the network device 2000 is coupled via a bus system 2040. The bus system 2040 includes a data bus and further includes a power bus, control bus, status signal bus, and the like.

[00230] The processor 2010 is configured to determine indication information that indicates aging speed of channels of a first terminal device.

[00231] Alternatively, the transceiver 2020 is configured to transmit the indication information determined by the processor 2010 to a network device in order to allow the network device to determine first symbol for SRS transmission from the first terminal device and second symbol to lower link data transmission of the first terminal device according to the channel aging speed of the first terminal device.

[00232] Alternatively, the channel aging rate of the first terminal device is higher than the channel aging rate of a second terminal device, the first symbol for SRS transmission of the first terminal device is located after a symbol for transmission of SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device are located before a symbol for transmitting lower link data of the second terminal device.

[00233] Alternatively, the indication information includes magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device.

[00234] Fig. 21 illustrates a schematic structural diagram of a system chip in accordance with an embodiment of the present invention. The system chip 2100 of Fig. 21 includes an input interface 2101, output interface 2102, at least one processor 2103, and memory 2104. The input interface 2101, the output interface 2102, the processor 2103, and the memory 2104 are connected via bus 2105. Processor 2103 is configured to execute a code in memory 2104. When the code is executed, processor 2103 implements the method executed by the terminal device in Fig. 9.

[00235] The terminal device 1900 illustrated in Fig. 19, the terminal device 2000 illustrated in Fig. 20, or the system chip 2100 illustrated in Fig. 21 can implement each process implemented by the terminal device in realizing the method of Fig. 8. No further details will be presented here to avoid repetition.

[00236] It should be understood that the processor according to the embodiment of the present invention may be an integrated circuit chip and has signal processing capability. In one embodiment, each step of the method realizations may be performed by a hardware logic circuit integrated into the processor or instruction in software form. The processor may be a universal processor, Digital Signal Processor (DSP), Application Specific Integrated Circuit (ASIC), Field Programmable Gate Assembly (FPGA), or other programmable logic device, discrete gate, or transistor and component logic device. discrete hardware. Each method, step and logical block diagram described in embodiments of the present invention can be implemented or performed. The universal processor may be a microprocessor or the processor may also be any conventional processor and the like. The steps of the methods described in combination with the embodiments of the present invention may be carried out directly for execution and completion by a hardware decoding processor or execution and completion by a combination of hardware and software modules in the decoding processor. The software module may be located on a mature storage medium in this field, such as Random Access Memory (RAM), flash memory, Read-Only Memory (ROM), Programmable ROM (PROM), or Electrically Erasable PROM (EEPROM). and a record. The storage medium is located in a memory and the processor reads information in the memory and performs the method steps in combination with hardware.

[00237] It can be understood that the memory according to the embodiment of the present invention may be volatile memory or non-volatile memory, or may include volatile and non-volatile memories. Non-volatile memory can be ROM, PROM, Erasable PROM (EPROM), EEPROM or flash memory. The volatile memory can be RAM and is used as an external high-speed cache. It is described, as an example, but without limitations, that RAMs can be adopted in various forms, such as Static RAM (SRAM), Dynamic RAM (DRAM), Synchronous DRAM (SDRAM), Double Data Rate SDRAM (DDRSDRAM ), Enhanced SDRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DR RAM). It should be noted that the system and method memory of the present invention is intended to include, but is not limited to, memories of these and any other appropriate types.

[00238] Furthermore, the terms “system” and “network”, according to the present invention, are normally interchangeable in the present invention. In the present invention, the term “and/or” is merely an association relationship that describes associated objects and indicates that three relationships may exist. A and/or B, for example, may represent three conditions: that is, existence independent of A, existence of both A and B, and existence independent of B. Furthermore, the character “/” in the present invention typically indicates that the previous and next associated objects form an “or” relationship.

[00239] It should be understood that, in the embodiments of the present invention, “B corresponding to A” indicates that B is associated with A and B can be determined according to A. It should also be understood that the determination of B according to with A does not indicate that B is only determined according to A; B can also be determined according to A and/or other information.

[00240] Those of ordinary skill in the art can understand that the algorithm units and operations of each example described in combination with the embodiments described in the present invention can be implemented by means of electronic hardware or a combination of computer software and electronic hardware. The execution of these functions in hardware or software form depends on specific applications and design constraints of technical solutions. Professionals can perform the functions described for each specific application using different methods, but this performance must fall within the scope of the present invention.

[00241] Those skilled in the art can clearly learn that the system, device and unit specific work processes described above may indicate the corresponding processes of method realization and will not be elaborated at present for convenience and speed of description.

[00242] In some embodiments provided by the present invention, it should be understood that the described system, device and method can be implemented in another way. The device realization described above, for example, is only schematic and, for example, the division of units is only logical function division and other forms of division may be adopted during practical implementation. Several components or units may, for example, be combined or integrated into another system or some features may be ignored or not implemented. Furthermore, coupling, direct coupling or communication connection between each component displayed or discussed may be communication connection or indirect coupling, implemented through some interfaces, the device or units, and may be electrical, mechanical or adopt other forms.

[00243] Units described as separate parts may or may not be physically separate and parts displayed in the form of units may or may not be physical units and may therefore be located in the same location or may also be distributed to several network units. Units can be selected, in whole or in part, to achieve the purpose of the output solutions according to practical need.

[00244] Furthermore, each functional unit of each embodiment of the present invention can be integrated into a processing unit, each unit can also exist independently and two or more than two units can also be integrated into one unit.

[00245] When realized in the form of a functional software unit and sold or used as an independent product, the function can also be stored on computer-readable storage media. Based on this understanding, technical solutions in accordance with the present invention that substantially or partially make contributions to the state of the art or technical solutions, in whole or in part, may be realized in the form of a software product and the product of computer software is stored on a storage medium, which includes a series of instructions configured to enable a computer device (which may be a personal computer, server, network device or similar) to execute, in whole or in part, the steps of the method according to each embodiment of the present invention. The above-mentioned storage medium includes: various media capable of storing program codes, such as U disk, mobile hard disk, ROM, RAM, magnetic disk or optical disk.

[00246] The above is only the specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any variations or substitutions evident to those skilled in the art within the scope of the technique described by the present invention must fall within the scope of protection of the present invention. The scope of protection of the present invention must therefore be subject to the scope of protection of the claims.

Claims (12)

1. METHOD OF TRANSMISSION OF SOUND REFERENCE SIGNALS (SRS) OF CHANNELS, characterized by comprising: - receipt, by a first terminal device, of first indication information from a network device, the first indication information indicates a first symbol for transmitting SRS from the first terminal device in a first upper link subframe, the first upper link subframe comprising multiple symbols for transmitting SRSs from multiple terminal devices, the multiple terminal devices comprising the first terminal device, and the multiple symbols comprising the first symbol; and - transmission, by the first terminal device, of the SRS of the first terminal device to the network device in the first symbol; wherein a length of the first symbol for transmitting the SRS of the first terminal device is different from a length of a second symbol for transmitting lower link data of the first terminal device. 2. METHOD according to claim 1, characterized in that the first indication information received from the network device by the first terminal device further indicates a frequency domain resource for transmitting the SRS of the first terminal device. 3. METHOD, according to claim 1 or 2, characterized in that a frequency domain band configured for transmission of the lower link data of the first terminal device is identical to a frequency domain band configured for transmission of the SRS of the first device terminal. 4. METHOD according to any one of claims 1 to 3, characterized in that it additionally comprises: - transmission, by the first terminal device, of second indication information indicating channel aging speed from the first terminal device to the network device; wherein the first indication information received from the network device by the first terminal device indicates the second symbol for transmitting the lower link data of the first terminal device. 5. METHOD according to claim 4, characterized in that the various symbols additionally comprise a symbol for transmitting SRS from a second terminal device, wherein the channel aging rate of the first terminal device is greater than the channel aging rate of the second terminal device; and - the first symbol for transmitting the SRS of the first terminal device is arranged after the symbol for transmitting the SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is arranged before a symbol for transmitting lower link data from the second terminal device. 6. METHOD according to claim 4 or 5, characterized in that the second indication information comprises the magnitude of the channel aging speed of the first terminal device or speed level corresponding to the channel aging speed of the first terminal device. 7. TERMINAL DEVICE FOR TRANSMITTING CHANNEL SOUND REFERENCE SIGNAL (SRS), characterized by comprising: - a receiver module, configured to receive first indication information from a network device, the first indication information indicates a first symbol for transmission of SRS of the first terminal device in a first upper link subframe, the first upper link subframe comprising multiple symbols for transmitting SRSs of multiple terminal devices, the multiple terminal devices comprising the first terminal device, and the multiple symbols comprising the first symbol; and - a transmitter module, configured to transmit the SRS from the first terminal device to the network device in the first symbol; wherein a length of the first symbol for transmitting the SRS of the first terminal device is different from a length of a second symbol for transmitting lower link data of the first terminal device. 8. TERMINAL DEVICE according to claim 7, characterized in that the first indication information received from the network device by the first terminal device further indicates a frequency domain resource for transmitting the SRS of the first terminal device. 9. TERMINAL DEVICE, according to claim 7 or 8, characterized in that a frequency domain resource configured for transmission of lower link data of the first terminal device is identical to the frequency domain range configured for transmission of the SRS of the first device terminal. 10. TERMINAL DEVICE according to any one of claims 7 to 9, characterized in that the transmission module is additionally configured to: - transmit second indication information indicating channel aging speed from the first terminal device to the network device; wherein the first indication information received from the network device by the receiving module further indicates the position of the second symbol for transmitting the lower link data of the first terminal device. 11. TERMINAL DEVICE according to claim 10, characterized in that the various symbols additionally comprise a symbol for SRS transmission from a second terminal device, wherein the channel aging rate of the first terminal device is greater than the channel aging rate of channels of the second terminal device; wherein the first symbol for transmitting the SRS of the first terminal device is disposed after a symbol for transmitting SRS of the second terminal device and the second symbol for transmitting the lower link data of the first terminal device is disposed before a symbol for transmitting lower link data from the second terminal device. 12. TERMINAL DEVICE, according to claim 10 or 11, characterized by the second indication information comprising the magnitude of the channel aging speed of the first terminal device, a speed level corresponding to the channel aging speed of the first terminal device.