# US 12,120,642 B2 · Method for demodulating shared reference signal, terminal device, and network device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,642 B2 - Document ID: US12120642B2 - Status: Granted - Kind: B2 - Application number: 17/455,954 - Filed: 2021-11-22 - Published: 2022-03-17 - Granted: 2024-10-15 - Earliest claimed: 2021-11-22 - Assignees: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Applicants: Guangdong Oppo Mobile Telecommunications Corp., Ltd. - Inventors: Hai Tang - Web page: https://patentgrep.com/patent/US12120642B2 ## CPC - H04L 5/005: {of common pilots, i.e. pilots destined for multiple users or terminals} - H04W 72/02: Selection of wireless resources by user or terminal - H04L 5/0051: {of dedicated pilots, i.e. pilots destined for a single user or terminal} - H04L 5/0094: {Indication of how sub-channels of the path are allocated} - H04L 5/10: with dynamo-electric generation of carriers; with mechanical filters or demodulators - H04W 28/20: Negotiating bandwidth - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/0064: {Rate requirement of the data, e.g. scalable bandwidth, data priority} - H04L 25/0202: {Channel estimation} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Embodiments of the present application provide a method for demodulating a shared reference signal, a terminal device, and a network device. The method comprises: a terminal device receives first indication information sent by a network device, the first indication information being used for indicating resource information of a target resource group allocated for the terminal device; and the terminal device determines the length of the sequence of a shared reference signal according to the resource information of the target resource group, wherein the shared reference signal is a reference signal shared by multiple terminal devices, and the length of the sequence of the shared reference signal is used for demodulating the shared reference signal. Embodiments of the present application can implement channel estimation or channel measurement. ## Claims ### Claim 1 A method for demodulating a shared reference signal, comprising: receiving, by a terminal device, first indication information sent by a network device; and determining, by the terminal device, a target sequence corresponding to the terminal device from a sequence of the shared reference signal according to the first indication information, wherein the shared reference signal is a reference signal shared by a plurality of terminal devices and the target sequence is used to demodulate a target reference signal corresponding to the terminal device from the shared reference signal, wherein the first indication information is to indicate position information of the target sequence, and determining, by the terminal device, the target sequence corresponding to the terminal device from the sequence of the shared reference signal according to the first indication information comprises: determining, by the terminal device, the target sequence from the sequence of the shared reference signal according to the position information of the target sequence and a length of the target sequence, or wherein the first indication information is to indicate resource information of a target resource group, and determining, by the terminal device, the target sequence corresponding to the terminal device from the sequence of the shared reference signal according to the first indication information comprises: determining, by the terminal device, a position of the target sequence in the sequence of the shared reference signal according to the resource information of the target resource group; and determining, by the terminal device, the target sequence from the sequence of the shared reference signal according to the position of the target sequence in the sequence of the shared reference signal and a length of the target sequence. ### Claim 2 (depends on 1) The method of claim 1, wherein the first indication information is to indicate a starting position of the target sequence in the sequence of the shared reference signal. ### Claim 3 (depends on 1) The method of claim 1, wherein the first indication information is to indicate a position of a resource in the target resource group in a system resource. ### Claim 4 A method for demodulating a shared reference signal, comprising: determining, by a network device, first indication information; and sending, by the network device, the first indication information to a terminal device for determining a target sequence corresponding to the terminal device from a sequence of the shared reference signal according to the first indication information, wherein the shared reference signal is a reference signal shared by a plurality of terminal devices and the target sequence is used to demodulate a target reference signal corresponding to the terminal device from the shared reference signal, wherein the first indication information is to indicate position information of the target sequence, or wherein the first indication information is to indicate resource information of a target resource group. ### Claim 5 (depends on 4) The method of claim 4, wherein the first indication information is to indicate a starting position of the target sequence in the sequence of the shared reference signal. ### Claim 6 (depends on 4) The method of claim 4, wherein the first indication information is to indicate a position of a resource in the target resource group in a system resource. ### Claim 7 A terminal device, comprising: a transceiver, configured to receive first indication information sent by a network device; and a processor, configured to determine a target sequence corresponding to the terminal device from a sequence of a shared reference signal according to the first indication information, wherein the shared reference signal is a reference signal shared by a plurality of terminal devices and the target sequence is used to demodulate a target reference signal corresponding to the terminal device from the shared reference signal, wherein the first indication information is to indicate position information of the target sequence, and the processor is configured to determine the target sequence from the sequence of the shared reference signal according to the position information of the target sequence and a length of the target sequence, or wherein the first indication information is to indicate resource information of a target resource group, and the processor is configured to: determine a position of the target sequence in the sequence of the shared reference signal according to the resource information of the target resource group and determine the target sequence from the sequence of the shared reference signal according to the position of the target sequence in the sequence of the shared reference signal and a length of the target sequence. ### Claim 8 (depends on 7) The terminal device of claim 7, wherein the first indication information is to indicate a starting position of the target sequence in the sequence of the shared reference signal. ### Claim 9 (depends on 7) The terminal device of claim 7, wherein the first indication information is to indicate a position of a resource in the target resource group in a system resource. ### Claim 10 A network device, comprising: a processor, configured to determine first indication information; and a transceiver, configured to send the first indication information to a terminal device for determining a target sequence corresponding to the terminal device from a sequence of a shared reference signal according to the first indication information, wherein the shared reference signal is a reference signal shared by a plurality of terminal devices and the target sequence is used to demodulate a target reference signal corresponding to the terminal device from the shared reference signal, wherein the first indication information is to indicate position information of the target sequence, or wherein the first indication information is to indicate resource information of a target resource group. ### Claim 11 (depends on 10) The network device of claim 10, wherein the first indication information is to indicate a starting position of the target sequence in the sequence of the shared reference signal. ### Claim 12 (depends on 10) The network device of claim 10, wherein the first indication information is to indicate a position of a resource in the target resource group in a system resource.