# US 10,455,568 B2 · Method and apparatus for transmitting and receiving control channel by beamforming in a wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,455,568 B2 - Document ID: US10455568B2 - Status: Granted - Kind: B2 - Application number: 15/644,625 - Filed: 2017-07-07 - Published: 2017-10-26 - Granted: 2019-10-22 - Earliest claimed: 2012-12-21 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Hyun-Kyu Yu; Tae-Young Kim; Jeong-Ho Park; Cheol Jeong - Web page: https://patentgrep.com/patent/US10455568B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04B 7/0617: {for beam forming} - H04B 7/0682: {using phase diversity (e.g. phase sweeping)} - H04L 5/0023: {Time-frequency-space} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - 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)} - H04W 72/046: {the resource being in the space domain, e.g. beams} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04B: TRANSMISSION - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A method and apparatus for transmitting and receiving a control channel by beamforming in a wireless communication system are provided. The transmission method includes determining a plurality of pieces of control information to be transmitted on control channels and determining transmission beams for use in beamforming transmission of the plurality of pieces of control information, mapping at least one piece of beam region information indicating at least one beam region in a control channel region and the plurality of pieces of control information to the at least one beam region in the control channel region, at least one piece of control information corresponding to the same transmission beam being arranged in one beam region, and transmitting the mapped beam region information and the mapped control information by transmission beams corresponding to the beam regions in the control channel region. ## Claims ### Claim 1 A method for transmitting control information by a base station in a wireless communication system, the method comprising: generating at least two control information sets to be transmitted on at least two control channels, and allocating a transmission beam to be used for beamforming transmission of the at least two control information sets to the at least two control channels; generating a control format indication to be transmitted by the transmission beam on a control format channel related to at least two control channels, wherein: the control format indication indicates a first resource region in which including the at least two control channels in a control channel resource region having time-frequency resources, the at least two control channels and the control format channel are arranged in a second resource region grouped in the control channel resource region based on the transmission beam, and the at least two control channels are arranged following the control format channel in the second resource region; and transmitting the control format indication on the control format channel and the at least two control information sets on the at least two control channels by using the transmission beam. ### Claim 2 (depends on 1) The method of claim 1, wherein the control format indication includes: information about at least one of a position of the first resource region, a number of the at least two control information sets included in the first resource region, a type of each of the at least two control information sets, a position of each of the at least two control information sets in the first resource region, a size of each of the at least two control information sets, or modulation and coding schemes (MCSs) applied to the at least two control channels. ### Claim 3 (depends on 1) The method of claim 1, wherein the control channel resource region further includes one or more resource regions each including at least one control channel allocated to a same transmission beam, and each of the one or more resource regions is arranged following a corresponding control format channel. ### Claim 4 (depends on 1) The method of claim 1, wherein the control channel resource region includes a plurality of control format channels including the control format channel and a plurality of control channels including the at least two control channels, and the plurality of control format channels are arranged following all of resource regions including the plurality of control channels. ### Claim 5 (depends on 4) The method of claim 4, wherein the plurality of control format channels are arranged in a same order as an arrangement of the resource regions. ### Claim 6 (depends on 1) The method of claim 1, wherein the control format indication indicates presence or absence of the at least two control channels set allocated to the transmission beam. ### Claim 7 (depends on 1) The method of claim 1, wherein the control format indication includes a reference signal scrambled with a sequence mapped to the transmission beam. ### Claim 8 (depends on 1) The method of claim 1, wherein the first resource region includes a control channel allocated to a beam having a narrower beamwidth than the transmission beam. ### Claim 9 A method for receiving control information by a mobile station in a wireless communication system, the method comprising: obtaining a control format indication transmitted by a transmission beam of a base station on a control format channel in a control channel resource region having time-frequency resources, the control format indication indicating a first resource region including at least two control channels in the control channel resource region; and obtaining at least two control information sets transmitted by the transmission beam on the at least two control channels in the first resource region indicated by the control format indication, wherein the at least two control channels and the control format channel are arranged in a second resource region grouped in the control channel resource region based on the transmission beam, and wherein the at least two control channels are arranged following the control format channel in the second resource region. ### Claim 10 (depends on 9) The method of claim 9, wherein the control format indication includes: information about at least one of a position of the first resource region, a number of the at least two control information sets, a type of each of the at least two control information sets, a position of each of the at least two control information sets in the resource region, a size of each of the at least two control information sets, or modulation and coding schemes (MCSs) applied to the at least two control channels. ### Claim 11 (depends on 9) The method of claim 9, wherein the control channel resource region further includes one or more resource regions each including at least one control channel allocated to a same transmission beam, and each of the one or more resource regions is arranged following a corresponding control format indication. ### Claim 12 (depends on 9) The method of claim 9, wherein the control channel resource region includes a plurality of control format channels including the control format channel and a plurality of control channels including the at least two control channels, and the plurality of control format channels are arranged following all of resource regions including the plurality of control channels. ### Claim 13 (depends on 12) The method of claim 12, wherein the plurality of control format channels are arranged in a same order as an arrangement of the resource regions. ### Claim 14 (depends on 9) The method of claim 9, wherein the control format indication indicates presence or absence of the at least two control channels allocated to the transmission beam. ### Claim 15 (depends on 9) The method of claim 9, wherein the control format indication includes a reference signal scrambled with a sequence mapped to the transmission beam. ### Claim 16 (depends on 9) The method of claim 9, wherein the first resource region includes a control channel allocated to a beam having a narrower beamwidth than the transmission beam. ### Claim 17 A base station for transmitting a control channel by beamforming in a wireless communication system, the base station comprising: a transceiver; and at least one processor configured to: generate at least two control information sets to be transmitted on at least two control channels, and allocate a transmission beam to be used for beamforming transmission of the at least two control information sets to the at least two control channels, and generate a control format indication to be transmitted by the transmission beam on a control format channel related to at least two control channels, wherein: the control format indication indicates a first resource region including the at least two control channels in a control channel resource region having time-frequency resources, the at least two control channels and the control format channel are arranged in a second resource region grouped in the control channel resource region based on the transmission beam, and the at least two control channels are arranged following the control format channel in the second resource region; and control the transceiver to transmit the control format indication on the control format channel and the at least two control information sets on the at least two control channels by using the transmission beam. ### Claim 18 (depends on 17) The base station of claim 17, wherein the control format indication includes: information about at least one of a position of the first resource region, a number of the at least two control information sets included in the first resource region, a type of each of the at least two control information sets, a position of each of the at least two control information sets in the first resource region, a size of each of the at least two control information sets, or modulation and coding schemes (MCSs) applied to the at least two control channels. ### Claim 19 (depends on 17) The base station of claim 17, wherein the control channel resource region further includes one or more resource regions each including at least one control region allocated to a same transmission beam, and each of the one or more resource regions is arranged following a corresponding control format channel. ### Claim 20 (depends on 17) The base station of claim 17, wherein the control channel resource region includes a plurality of control format channels including the control format channel and a plurality of control channels including the at least two control channels, and the plurality of control format channels are arranged following all of resource regions including the plurality of control channels. ### Claim 21 (depends on 20) The base station of claim 20, wherein the plurality of control format channels are arranged in a same order as an arrangement of the resource regions. ### Claim 22 (depends on 19) The base station of claim 19, wherein the control format indication indicates presence or absence of the at least two control channels allocated to the transmission beam. ### Claim 23 (depends on 17) The base station of claim 17, wherein the control format indication includes a reference signal scrambled with a sequence mapped to the transmission beam. ### Claim 24 (depends on 17) The base station of claim 17, wherein the first resource region includes a control channel allocated to a beam having a narrower beamwidth than the transmission beam. ### Claim 25 A mobile station for receiving control information in a wireless communication system, the mobile station comprising: a transceiver; and at least one processor configured to control the transceiver to: obtain a control format indication transmitted by a transmission beam of a base station on a control format channel in a control channel resource region having time-frequency resources, the control format indication indicating a first resource region including at least two control channels in the control channel resource region, and obtain at least two control information sets transmitted by the transmission beam on the at least two control channels in the first resource region indicated by the control format indication, wherein the at least two control channels and the control format channel are arranged in a second resource region grouped in the control channel resource region based on the transmission beam, and wherein the at least two control channels are arranged following the control format channel in the second resource region. ### Claim 26 (depends on 25) The mobile station of claim 25, wherein the control format indication includes: information about at least one of a position of the first resource region, a number of the at least two control information sets, a type of the at least two control information sets, a position of each of the at least two control information sets in the first resource region, a size of each of the at least two control information sets, or modulation and coding schemes (MCSs) applied to the at least two control channels. ### Claim 27 (depends on 25) The mobile station of claim 25, wherein the control channel resource region further includes one or more resource regions each including at least one control channel allocated to a same transmission beam, and each of the one or more resource regions is arranged following a corresponding control format indication. ### Claim 28 (depends on 25) The mobile station of claim 25, wherein the control channel resource region includes a plurality of control format channels including the control format channel and a plurality of control channels including the at least two control channels, and the plurality of control format channels are arranged following all of resource regions including the plurality of control channels. ### Claim 29 (depends on 28) The mobile station of claim 28, wherein the plurality of control format channels are arranged in a same order as an arrangement of the resource regions. ### Claim 30 (depends on 25) The mobile station of claim 25, wherein the control format indication indicates presence or absence of the at least two control channels allocated to the transmission beam. ### Claim 31 (depends on 25) The mobile station of claim 25, wherein the control format indication includes a reference signal scrambled with a sequence mapped to the transmission beam. ### Claim 32 (depends on 25) The mobile station of claim 25, wherein the first resource region includes a control channel allocated to a beam having a narrower beamwidth than the transmission beam.