# US 12,193,028 B2 · Detecting method, transmitting method and apparatus for common control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,193,028 B2 - Document ID: US12193028B2 - Status: Granted - Kind: B2 - Application number: 18/295,680 - Filed: 2023-04-04 - Published: 2023-10-05 - Granted: 2025-01-07 - Earliest claimed: 2013-01-18 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Lei Guan; Lixia Xue; Yongxing Zhou; Qiang Li; Jingyuan Sun - Web page: https://patentgrep.com/patent/US12193028B2 ## CPC - H04W 48/12: using downlink control channel - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04L 5/0073: {Allocation arrangements that take into account other cell interferences} - H04L 41/12: Discovery or management of network topologies - H04L 45/02: Topology update or discovery - 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} - H04W 72/04: Wireless resource allocation - H04W 88/02: Terminal devices - 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 includes: transmitting a first common control channel on a first resource, wherein the first resource is one candidate resource of a first candidate resource set within downlink resources of a cell, wherein the first common control channel carries a common search space indication information, wherein the common search space indication information indicates an actual resource of a common search space in a second candidate resource set of the cell, wherein the second candidate resource set is a subset of a common search space candidate resource set, wherein the common search space candidate resource set comprises at least two subsets, and wherein each subset of the at least two subsets corresponds to a candidate resource of the first candidate resource set; and transmitting a physical downlink control channel in the actual resource of the common search space. ## Claims ### Claim 1 A method, comprising: transmitting, by an apparatus, a first common control channel on a first resource that is a candidate resource of a first candidate resource set within downlink resources of a cell, wherein the first common control channel carries a common search space indication information indicating a candidate resource of a common search space in a second candidate resource set that is a subset of a common search space candidate resource set, wherein the common search space candidate resource set comprises at least two subsets corresponding to at least two candidate resources of the first candidate resource set; and transmitting, by the apparatus, a physical downlink control channel on the candidate resource of the common search space. ### Claim 2 (depends on 1) The method according to claim 1, wherein position information of the first resource indicates the second candidate resource set. ### Claim 3 (depends on 1) The method according to claim 1, wherein the first candidate resource set comprises four candidate resources for carrying common control channels, and the common search space candidate resource set comprises four subsets. ### Claim 4 (depends on 1) The method according to claim 1, wherein the downlink resources are frequency resources for detecting the first common control channel of the cell, and wherein a bandwidth of the downlink resources is equal to a predefined value. ### Claim 5 (depends on 1) The method according to claim 1, wherein the first common control channel carries a system radio frame number. ### Claim 6 (depends on 1) The method according to claim 1, wherein the first common control channel is a physical broadcasting channel. ### Claim 7 (depends on 1) The method according to claim 1, further comprising: determining, by the apparatus, the first resource from the first candidate resource set. ### Claim 8 An apparatus, comprising one or more processors configured to: transmit a first common control channel on a first resource that is a candidate resource of a first candidate resource set within downlink resources of a cell, wherein the first common control channel carries a common search space indication information indicating a candidate resource of a common search space in a second candidate resource set that is a subset of a common search space candidate resource set, wherein the common search space candidate resource set comprises at least two subsets corresponding to at least two candidate resources of the first candidate resource set; and transmit a physical downlink control channel on the candidate resource of the common search space. ### Claim 9 (depends on 8) The apparatus according to claim 8, wherein position information of the first resource indicates the second candidate resource set for a user equipment (UE). ### Claim 10 (depends on 8) The apparatus according to claim 8, wherein the first candidate resource set comprises four candidate resources for carrying a common control channel, and the common search space candidate resource set comprises four subsets. ### Claim 11 (depends on 8) The apparatus according to claim 8, wherein the downlink resources are frequency resources for detecting the first common control channel of the cell, and wherein a bandwidth of the downlink resources is equal to a predefined downlink resource bandwidth. ### Claim 12 (depends on 8) The apparatus according to claim 8, wherein the first common control channel carries a system radio frame number. ### Claim 13 (depends on 8) The apparatus according to claim 8, wherein the first common control channel is a physical broadcasting channel. ### Claim 14 (depends on 8) The apparatus according to claim 8, wherein the one or more processors are further configured to determine the first resource from the first candidate resource set. ### Claim 15 A method, comprising: transmitting, by a first apparatus, a first common control channel on a first resource that is a candidate resource of a first candidate resource set within downlink resources of a cell, wherein the first common control channel carries a common search space indication information indicating a candidate resource of a common search space in a second candidate resource set that is a subset of a common search space candidate resource set, wherein the common search space candidate resource set comprises at least two subsets corresponding to at least two candidate resources of the first candidate resource set; receiving, by a second apparatus, the first common control channel on the first resource; transmitting, by the first apparatus, a physical downlink control channel on the candidate resource of the common search space; and receiving, by the second apparatus, the physical downlink control channel on the candidate resource of the common search space. ### Claim 16 (depends on 15) The method according to claim 15, wherein the method further comprising: determining, by the second apparatus based on position information of the first resource and the common search space indication information, the candidate resource of the common search space in the second candidate resource set of the cell. ### Claim 17 (depends on 15) The method according to claim 15, wherein position information of the first resource indicates the second candidate resource set for the second apparatus. ### Claim 18 (depends on 15) The method according to claim 15, wherein the first candidate resource set comprises four candidate resources for carrying a common control channel, and the common search space candidate resource set comprises four subsets. ### Claim 19 (depends on 15) The method according to claim 15, wherein the downlink resources are frequency resources for detecting the first common control channel of the cell, and wherein a bandwidth of the downlink resources is equal to a predefined downlink resource bandwidth. ### Claim 20 (depends on 15) The method according to claim 15, wherein the first common control channel carries a system radio frame number, and wherein the first common control channel is a physical broadcasting channel. ### Claim 21 (depends on 15) The method according to claim 15, wherein the method further comprising: determining, by the first apparatus, the first resource from the first candidate resource set.