# US 2019/0380133 A1 · Method for transmitting srs, network device and terminal device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0380133 A1 - Document ID: US20190380133A1 - Status: Published application - Kind: A1 - Application number: 16/550,728 - Filed: 2019-08-26 - Published: 2019-12-12 - Earliest claimed: 2016-09-23 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Hai TANG - Web page: https://patentgrep.com/patent/US20190380133A1 ## CPC - H04W 72/542: using measured or perceived quality - H04L 5/0037: {Inter-user or inter-terminal allocation} - H04L 5/0048: {Allocation of pilot signals, i.e. of signals known to the receiver (allocation of control signalling H04L5/0053; use of control signalling H04L5/0091)} - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/006: {Quality of the received signal, e.g. BER, SNR, water filling} - H04W 72/04: Wireless resource allocation - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/0453: Resources in frequency domain, e.g. a carrier in FDMA - H04W 72/20: Control channels or signalling for resource management - H04W 72/51: based on terminal or device properties - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Disclosed in the present invention are a method for transmitting a sounding reference signal (SRS), a network device and a terminal device. The method comprises: a network device determining multiple symbols used for transmitting an SRS in a first uplink subframe; the network device transmitting first indication information to each of multiple terminal devices, the first indication information being used for indicating a symbol of the multiple symbols corresponding to said each terminal device, a first terminal device of the multiple terminal devices corresponding to a first symbol of the multiple symbols, the first symbol being used for transmitting the SRS of the first terminal device. Thus, during the transmission between the network device and the terminal device using uplink-downlink channel reciprocity, influences caused by channel characteristic aging can be reduced. ## Claims ### Claim 1 A method for transmitting a channel sounding reference signal (SRS), comprising: receiving, by a first terminal device, first indication information from a network device, the first indication information indicating a position of a first symbol for transmitting an SRS of the first terminal device; and transmitting, by the first terminal device, the SRS of the first terminal device to the network device on the first symbol. ### Claim 2 (depends on 1) The method of claim 1, wherein the first indication information indicates the position of the first symbol for transmitting the SRS of the first terminal device in a first uplink subframe. ### Claim 3 (depends on 2) The method of claim 2, wherein the first uplink subframe comprises multiple symbols for transmitting SRSs of multiple terminal devices, the multiple terminal devices comprise the first terminal device, and the multiple symbols comprise the first symbol. ### Claim 4 (depends on 1) The method of claim 1, wherein a length of the first symbol for transmitting the SRS of the first terminal device is unequal to a length of a second symbol for transmitting downlink data of the first terminal device. ### Claim 5 (depends on 1) The method of claim 1, wherein 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. ### Claim 6 (depends on 1) The method of claim 1, wherein a frequency-domain range configured for transmission of the downlink data of the first terminal device is the same as a frequency-domain range configured for transmission of the SRS of the first terminal device. ### Claim 7 (depends on 1) The method of claim 1, further comprising: transmitting, by the first terminal device, second indication information indicating a channel aging speed 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 the second symbol for transmitting the downlink data of the first terminal device. ### Claim 8 (depends on 7) The method of claim 7, wherein the multiple symbols further comprise a symbol for transmitting an SRS of a second terminal device, the channel aging speed of the first terminal device is higher than a channel aging speed of the second terminal device, 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 downlink data of the first terminal device is arranged before a symbol for transmitting downlink data of the second terminal device. ### Claim 9 (depends on 7) The method of claim 7, wherein the second indication information comprises a magnitude of the channel aging speed of the first terminal device or a speed level corresponding to the channel aging speed of the first terminal device. ### Claim 10 A terminal device for transmitting a channel Sounding Reference Signal (SRS), comprising: a transceiver, configured to: receive first indication information from a network device, the first indication information indicating a position of a first symbol for transmitting an SRS of the first terminal device; and transmit the SRS of the first terminal device to the network device on the first symbol. ### Claim 11 (depends on 10) The terminal device of claim 10, wherein the first indication information indicates the position of the first symbol for transmitting the SRS of the first terminal device in a first uplink subframe. ### Claim 12 (depends on 11) The terminal device of claim 11, wherein the first uplink subframe comprises multiple symbols for transmitting SRSs of multiple terminal devices, the multiple terminal devices comprise the first terminal device, and the multiple symbols comprise the first symbol. ### Claim 13 (depends on 10) The terminal device of claim 10, wherein a length of the first symbol for transmitting the SRS of the first terminal device is unequal to a length of a second symbol for transmitting downlink data of the first terminal device. ### Claim 14 (depends on 10) The terminal device of claim 10, wherein 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. ### Claim 15 (depends on 10) The terminal device of claim 10, wherein a frequency-domain resource configured for transmission of downlink data of the first terminal device is as same as the frequency-domain range configured for transmission of the SRS of the first terminal device. ### Claim 16 (depends on 10) The terminal device of claim 10, wherein the transceiver is further configured to: transmit second indication information indicating a channel aging speed of the first terminal device to the network device, the first indication information received from the network device further indicating a position of the second symbol for transmitting the downlink data of the first terminal device. ### Claim 17 (depends on 16) The terminal device of claim 16, wherein the multiple symbols further comprise a symbol for transmitting an SRS of a second terminal device, the channel aging speed of the first terminal device is higher than a channel aging speed of the second terminal device, the first symbol for transmitting the SRS of the first terminal device is arranged after a symbol for transmitting an SRS of the second terminal device, and the second symbol for transmitting the downlink data of the first terminal device is arranged before a symbol for transmitting downlink data of the second terminal device. ### Claim 18 (depends on 16) The terminal device of claim 16, wherein the second indication information comprises a magnitude of the channel aging speed of the first terminal device or a speed level corresponding to the channel aging speed of the first terminal device. ### Claim 19 A terminal device for transmitting a channel Sounding Reference Signal (SRS), comprising: a transceiver, configured to transmit indication information indicating a channel aging speed of a first terminal device to a network device. ### Claim 20 (depends on 19) The terminal device of claim 19, wherein the channel aging speed of the first terminal device is higher than a channel aging speed of a second terminal device, a first symbol for transmitting an SRS of the first terminal device is arranged after a symbol for transmitting an SRS of the second terminal device, and a second symbol for transmitting downlink data of the first terminal device is arranged before a symbol for transmitting downlink data of the second terminal device.