# US 2017/0289924 A1 · Method and apparatus for transmitting uplink demodulation reference signals > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0289924 A1 - Document ID: US20170289924A1 - Status: Published application - Kind: A1 - Application number: 15/474,604 - Filed: 2017-03-30 - Published: 2017-10-05 - Earliest claimed: 2016-03-31 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Jingxing FU; Bin YU; Chen Qian; Qi Xiong - Web page: https://patentgrep.com/patent/US20170289924A1 ## CPC - H04W 52/246: {where the output power of a terminal is based on a path parameter calculated in said terminal} - H04L 5/0016: {Time-frequency-code} - 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 5/0051: {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} - H04W 52/146: {Uplink power control} - H04W 52/325: {Power control of control or pilot channels} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L 5/1469: {using time-sharing} - 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 A method and an apparatus for transmitting uplink demodulation reference signals (DMRSs) is provided. The method includes a user equipment (UE) determines an uplink DMRS format for demodulating a physical uplink shared channel (PUSCH) according to frequency-domain resources occupied by the PUSCH, in which the uplink DMRS format includes a comb occupied by a PUSCH DMRS sequence. The comb is subcarriers having specified intervals occupied by demodulation reference signals, and the specified intervals between the occupied subcarriers are same. For the DMRSs using the comb format, subcarriers with specific intervals are used for channel estimation, and values of the channel estimation are used for data demodulation. The UE transmits uplink information and the demodulation reference signals on physical resources using the uplink DMRS format. The present disclosure can improve the multiplexing ratio of uplink physical resources in a multi-UE scenario. ## Claims ### Claim 1 A method of a terminal in wireless communication, the method comprising: receiving, from a base station, information on a comb; generating demodulation-reference signal (DM-RS) base on the information on a comb; determining a transmit power of the DM-RS based on the information on a comb; and transmitting, to the base station, the DM-RS based on the transmit power of the DM-RS. ### Claim 2 (depends on 1) The method according to claim 1, further comprising: determining a length of DM-RS sequence to be generated, wherein the length of DM-RS sequence is not a multiple of 12. ### Claim 3 (depends on 1) The method according to claim 1, wherein information on a comb comprising information on repetition factor of the DM-RS. ### Claim 4 (depends on 1) The method according to claim 1, further comprising: receiving, from base station, downlink control information comprising information on orthogonal cover code and cyclic shift, wherein the generating DM-RS further based on the information on orthogonal cover code and cyclic shift. ### Claim 5 A method of a base station in wireless communication, the method comprising: transmitting, to a terminal, information on a comb; and receiving, from the terminal, demodulation-reference signal (DM-RS), wherein the DM-RS is generated based on the information on a comb and the DM-RS is transmitted on transmit power based on the information on a comb. ### Claim 6 (depends on 5) The method according to claim 5, wherein a length of DM-RS sequence is not a multiple of 12. ### Claim 7 (depends on 5) The method according to claim 5, wherein the information on a comb comprising information on repetition factor of the DM-RS. ### Claim 8 A terminal in wireless communication, the terminal comprising: a transceiver configured to transmit and receive signals; and a controller coupled to the transceiver and configured to control to: receive, from a base station, information on a comb, generate demodulation-reference signal (DM-RS) base on the information on a comb, determine transmit power of the DM-RS based on the information on a comb, and transmit, to the base station, the DM-RS based on the transmit power of the DM-RS. ### Claim 9 (depends on 8) The terminal according to claim 8, wherein the controller is further configured to control to determine a length of DM-RS sequence to be generated, wherein the length of DM-RS sequence is not a multiple of 12. ### Claim 10 (depends on 8) The terminal according to claim 8, wherein the information on a comb comprising information on repetition factor of the DM-RS. ### Claim 11 (depends on 8) The terminal according to claim 8, wherein the controller is further configured to control to receive, from base station, downlink control information comprising information on orthogonal cover code and cyclic shift, and wherein the generating DM-RS further based on the information on orthogonal cover code and cyclic shift. ### Claim 12 A base station in wireless communication, the base station comprising: a transceiver configured to transmit and receive signals; and a controller coupled to the transceiver and configured to: transmit, to a terminal, information on a comb, and receive, from the terminal, demodulation-reference signal (DM-RS), wherein the DM-RS is generated based on the information on a comb and the DM-RS is transmitted on transmit power based on the information on a comb. ### Claim 13 (depends on 12) The base station according to claim 12, wherein a length of DM-RS sequence is not a multiple of 12. ### Claim 14 (depends on 12) The base station according to claim 12, wherein the information on a comb comprising information on repetition factor of the DM-RS.