# US 11,310,010 B2 · Hybrid-SRS combination signaling > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,310,010 B2 - Document ID: US11310010B2 - Status: Granted - Kind: B2 - Application number: 16/476,616 - Filed: 2017-12-29 - Published: 2019-12-05 - Granted: 2022-04-19 - Earliest claimed: 2017-01-09 - Assignees: Telefonaktiebolaget LM Ericsson (publ) - Applicants: Telefonaktiebolaget LM Erícsson (publ) - Inventors: Sebastian Faxér; Fredrik Athley; Mattias Frenne; Virgile Garcia; Andreas Nilsson; Sven Petersson - Web page: https://patentgrep.com/patent/US11310010B2 ## CPC - 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)} - H04B 7/0456: Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting - H04B 7/0634: {Antenna weights or vector/matrix coefficients} - H04B 7/0639: {Using selective indices, e.g. of a codebook, e.g. pre-distortion matrix index [PMI] or for beam selection} - H04B 7/0691: {using subgroups of transmit antennas} - H04L 27/2601: {Multicarrier modulation systems} - H04W 72/21: in the uplink direction of a wireless link, i.e. towards the network - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04B: TRANSMISSION - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract Some embodiments include a method in a wireless device capable of uplink transmission in a wireless communication network. The wireless device comprises a plurality of antenna ports. The method comprises determining one or more subsets of the plurality of antenna ports. Each subset of antenna ports comprises antenna ports that can be coherently combined to form a precoding of a transmission layer for transmitting from the subset of antenna ports. The method further comprises communicating an indication of the one or more subsets to a network node, and receiving, from the network node, an instruction of a precoding to use for an uplink transmission. The instruction is based on the indicated one or more subsets. The method further comprises precoding an uplink transmission based on the received instruction, and transmitting the transmission to the network node. ## Claims ### Claim 1 A method in a wireless device operable to perform uplink transmission in a wireless communication network, the wireless device comprising a plurality of antenna ports, the method comprising: determining one or more subsets of the plurality of antenna ports, wherein each subset of antenna ports comprises antenna ports that are coherently combinable to form a precoding of a transmission layer for transmitting from the subset of antenna ports, and wherein each antenna port is associated with one or more baseband ports and whether a first antenna port is coherently combined with a second antenna port is based on physical properties of the baseband ports associated with the first antenna port and the baseband ports associated with the second antenna port; communicating an indication of the one or more subsets to a network node, wherein communicating the indication of the one or more subsets comprising sending, to the network node, a radio resource control (RRC) message that includes the indication; receiving, from the network node, an instruction of a precoding to use for an uplink transmission, the instruction based on the indicated one or more subsets; precoding an uplink transmission based on the received instruction; and transmitting the uplink transmission to the network node. ### Claim 2 (depends on 1) The method of claim 1, wherein the indication of the one or more subsets indicates which antenna ports are combinable. ### Claim 3 (depends on 1) The method of claim 1, wherein the indication of the one or more subsets indicates which antenna ports are not combinable. ### Claim 4 (depends on 1) The method of claim 1, wherein the indication of the one or more subsets indicates allowable precoders of a codebook. ### Claim 5 (depends on 1) The method of claim 1, wherein the indication of the one or more subsets indicates unallowable precoders of a codebook. ### Claim 6 (depends on 1) The method of claim 1, wherein the instruction of the precoding to use for the uplink transmission comprises a codebook selection. ### Claim 7 A wireless device operable to perform uplink transmission in a wireless communication network, the wireless device comprising a plurality of antenna ports and processing circuitry operable to: determine one or more subsets of the plurality of antenna ports, wherein each subset of antenna ports comprises antenna ports that are coherently combinable to form a precoding of a transmission layer for transmitting from the subset of antenna ports, and wherein each antenna port is associated with one or more baseband ports and whether a first antenna port is coherently combined with a second antenna port is based on physical properties of the baseband ports associated with the first antenna port and the baseband ports associated with the second antenna port; communicate an indication of the one or more subsets to a network node, wherein the processing circuitry is operable to communicate the indication of the one or more subsets by sending, to the network node, a radio resource control (RRC) message that includes the indication; receive, from the network node, an instruction of a precoding to use for an uplink transmission, the instruction based on the indicated one or more subsets; precode an uplink transmission based on the received instruction; and transmit the uplink transmission to the network node. ### Claim 8 (depends on 7) The wireless device of claim 7, wherein the indication of the one or more subsets indicates which antenna ports are combinable. ### Claim 9 (depends on 7) The wireless device of claim 7, wherein the indication of the one or more subsets indicates which antenna ports are not combinable. ### Claim 10 (depends on 7) The wireless device of claim 7, wherein the indication of the one or more subsets indicates allowable precoders of a codebook. ### Claim 11 (depends on 7) The wireless device of claim 7, wherein the indication of the one or more subsets indicates unallowable precoders of a codebook. ### Claim 12 (depends on 7) The wireless device of claim 7, wherein the instruction of the precoding to use for the uplink transmission comprises a codebook selection. ### Claim 13 A method in a network node operable to receive an uplink transmission in a wireless communication network from a wireless device comprising a plurality of antenna ports, the method comprising: receiving, from the wireless device, an indication of one or more subsets of the plurality of antenna ports, wherein each subset of antenna ports comprises antenna ports that are coherently combinable to form a precoding of a transmission layer for transmitting from the subset of antenna ports, and wherein each antenna port is associated with one or more baseband ports and whether a first antenna port is coherently combined with a second antenna port is based on physical properties of the baseband ports associated with the first antenna port and the baseband ports associated with the second antenna port, wherein receiving the indication comprises receiving a radio resource control (RRC) message; determining a precoding for the wireless device to use for an uplink transmission based on the received indication; and sending an instruction to use the determined precoding to the wireless device. ### Claim 14 (depends on 13) The method of claim 13, wherein the indication of the one or more subsets indicates which antenna ports are combinable. ### Claim 15 (depends on 13) The method of claim 13, wherein the indication of the one or more subsets indicates which antenna ports are not combinable. ### Claim 16 (depends on 13) The method of claim 13, wherein the indication of the one or more subsets indicates allowable precoders of a codebook. ### Claim 17 (depends on 13) The method of claim 13, wherein the indication of the one or more subsets indicates unallowable precoders of a codebook. ### Claim 18 (depends on 13) The method of claim 13, wherein the instruction to use the precoding for the uplink transmission comprises a codebook selection. ### Claim 19 A network node operable to receive an uplink transmission in a wireless communication network from a wireless device comprising a plurality of antenna ports, the network node comprising processing circuitry operable to: receive, from the wireless device, an indication of one or more subsets of the plurality of antenna ports, wherein each subset of antenna ports comprises antenna ports that are coherently combinable to form a precoding of a transmission layer for transmitting from the subset of antenna ports, and wherein each antenna port is associated with one or more baseband ports and whether a first antenna port is coherently combined with a second antenna port is based on physical properties of the baseband ports associated with the first antenna port and the baseband ports associated with the second antenna port, wherein the processing circuitry is operable to receive the indication by receiving a radio resource control (RRC) message; determine a precoding for the wireless device to use for an uplink transmission based on the received indication; and send an instruction to use the determined precoding to the wireless device. ### Claim 20 (depends on 19) The network node of claim 19, wherein the indication of the one or more subsets indicates which antenna ports are combinable. ### Claim 21 (depends on 19) The network node of claim 19, wherein the indication of the one or more subsets indicates which antenna ports are not combinable. ### Claim 22 (depends on 19) The network node of claim 19, wherein the indication of the one or more subsets indicates allowable precoders of a codebook. ### Claim 23 (depends on 19) The network node of claim 19, wherein the indication of the one or more subsets indicates unallowable precoders of a codebook. ### Claim 24 (depends on 19) The network node of claim 19, wherein the instruction to use the precoding for the uplink transmission comprises a codebook selection.