# US 9,520,981 B2 · Method and apparatus for providing automatic control channel mapping > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,520,981 B2 - Document ID: US9520981B2 - Status: Granted - Kind: B2 - Application number: 12/596,714 - Filed: 2008-01-11 - Published: 2010-10-14 - Granted: 2016-12-13 - Earliest claimed: 2007-01-12 - Assignees: Nokia Technologies Oy - Applicants: Frank Frederiksen; Troels Emil Kolding - Inventors: Frank Frederiksen; Troels Emil Kolding - Web page: https://patentgrep.com/patent/US9520981B2 ## CPC - H04L 5/023: {Multiplexing of multicarrier modulation signals, e.g. multi-user orthogonal frequency division multiple access [OFDMA] (multicarrier modulation H04L27/2601)} - H04L 5/0044: {Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH} - H04W 28/18: Negotiating wireless communication parameters - H04W 72/00: Local resource management - 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 An approach is provided for control signaling. A sub-set of channel parameters is received. Control channels are automatically mapped to physical resources of a communication network according to the received channel parameters. ## Claims ### Claim 1 A method comprising: receiving a sub-set of channel parameters through system information signaling; automatically mapping control channels to physical resources of a communication network according to the received channel parameters; and determining a number of the control channels based on the channel parameters, wherein the control channels are separately coded, wherein the channel parameters include a number of transmission symbols available in the control channels, and wherein the number of transmission symbols is determined based on a number of sub-carriers available for control information transmission in each of the transmission symbols, wherein the control channels are interleaved, and wherein the interleaving comprises a matrix of bits of control information corresponding to the control channels, and comprises an inter-column permutation pattern of the matrix; and transmitting the control information over the control channels mapped to the physical resources. ### Claim 2 (depends on 1) A method according to claim 1, wherein the physical resources include a plurality of sub-carriers. ### Claim 3 (depends on 2) A method according to claim 2, wherein a portion of the sub-carriers are allocated to a transmission symbol that includes an Orthogonal Frequency Division Multiplexing (OFDM) symbol. ### Claim 4 (depends on 3) A method according to claim 3, wherein the number of OFDM symbols is variable, the method further comprising: determining the number of OFDM symbols based on a desired number of the control channels. ### Claim 5 (depends on 1) A method according to claim 1, further comprising: adjusting an effective control channel code rate to obtain a desired number of the control channels. ### Claim 6 (depends on 1) A method according to claim 1, further comprising: allocating unused sub-carrier symbols according to an interleaving scheme to equally divide the unused sub-carrier symbols over a plurality of transmission symbols. ### Claim 7 (depends on 1) A method according to claim 1, further comprising: transmitting data over one of the control channels, the communication network having a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) architecture. ### Claim 8 An apparatus, comprising: at least one processor, and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: receive a sub-set of channel parameters through system information signaling, automatically map control channels to physical resources of a communication network according to the received channel parameters, and determine a number of the control channels based on the channel parameters, wherein the control channels are separately coded, wherein the channel parameters include a number of transmission symbols available in the control channels, and wherein the number of transmission symbols is determined based on a number of sub-carriers available for control information transmission in each of the transmission symbols, wherein the control channels are interleaved, and wherein the interleaving comprises a matrix of bits of control information corresponding to the control channels, and comprises an inter-column permutation pattern of the matrix, and transmit the control information over the control channels mapped to the physical resources. ### Claim 9 (depends on 8) An apparatus according to claim 8, wherein the physical resources include a plurality of sub-carriers. ### Claim 10 (depends on 8) An apparatus according to claim 8, wherein an effective control channel code rate is adjusted to obtain a desired number of the control channels. ### Claim 11 (depends on 8) An apparatus according to claim 8, further comprising: interleaving logic configured to equally divide unused sub-carrier symbols over a plurality of transmission symbols, wherein the unused sub-carrier symbols are allocated according to an interleaving scheme. ### Claim 12 (depends on 8) An apparatus according to claim 8, further comprising: a plurality of transmit antennas; and a transceiver coupled to the transmit antennas and configured to transmit data over one of the control channels, the communication network having a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) architecture. ### Claim 13 An apparatus, comprising: at least one processor; and at least one memory including computer program code, wherein the at least one memory and the computer program code are configured to, with the at least one processor, cause the apparatus at least to: determine location of one of a plurality of coded control channels established over a multiple input multiple output (MIMO) communication system by automatically mapping the control channels to a plurality of sub-carriers designated for use within the system, wherein the sub-carriers are allocated to a plurality of transmission symbols that include Orthogonal Frequency Division Multiplexing (OFDM) symbols, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to receive a sub-set of channel parameters through system information signaling, wherein the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to determine a number of the control channels based on the sub-set of channel parameters, wherein the channel parameters include a number of transmission symbols available in the control channels, and wherein the number of transmission symbols is determined based on a number of sub-carriers available for control information transmission in each of the transmission symbols, wherein the control channels are interleaved, and wherein the interleaving comprises a matrix of bits of control information corresponding to the control channels, and comprises an inter-column permutation pattern of the matrix, and transmit the control information over the control channels mapped to the physical resources. ### Claim 14 (depends on 13) An apparatus according to claim 13, wherein the number of OFDM symbols in each of the control channels is variable, the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to determine the number of OFDM symbols based on a desired number of the control channels. ### Claim 15 (depends on 13) An apparatus according to claim 13, wherein the number of OFDM symbols is predetermined, and the at least one memory and the computer program code are further configured to, with the at least one processor, cause the apparatus at least to adjust an effective control channel code rate to obtain a desired number of the control channels. ### Claim 16 (depends on 13) An apparatus according to claim 13, further comprising: a plurality of antennas; and a transceiver configured to transmit data over one of the control channels of the MIMO communication system, the MIMO communication system having a Third Generation Partnership Project (3GPP) Long Term Evolution (LTE) architecture.