# US 2019/0245665 A1 · Method, device and system for transmitting enhanced downlink control channel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0245665 A1 - Document ID: US20190245665A1 - Status: Published application - Kind: A1 - Application number: 16/385,252 - Filed: 2019-04-16 - Published: 2019-08-08 - Earliest claimed: 2011-08-18 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Qiang Wu; Yiqun Qian; Yang Li; Jianghua Liu - Web page: https://patentgrep.com/patent/US20190245665A1 ## 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)} - H04L 5/0016: {Time-frequency-code} - H04L 5/0023: {Time-frequency-space} - H04L 5/0026: {Division using four or more dimensions, e.g. beam steering or quasi-co-location [QCL]} - H04L 5/0053: {Allocation of signalling, i.e. of overhead other than pilot signals} - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - 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 The present invention discloses a method, a device and a system for transmitting an enhanced downlink control channel, which belong to the communications field. The method for sending an enhanced downlink control channel includes: presetting a multiplexing unit, where the multiplexing unit includes at least one resource block pair, and the at least one resource block pair includes E-PDCCH resources and DM RS resources, and the E-PDCCH resources include multiple control channel elements; sending at least one E-PDCCH corresponding to at least one UE in at least one control channel element of the multiplexing unit, and sending the DM RS corresponding to the at least one UE. The present invention reduces the granularity of an enhanced downlink control channel, saves resources and enhances the downlink control channel, thereby providing more control channels for the UE to use. ## Claims ### Claim 1 A method for receiving a downlink control channel, comprising: receiving, using a demodulation reference (DM RS) port, a signal on at least one resource block pair, each of the at least one resource block pair comprises downlink control channel resources and DM RS resources, the downlink control channel resources comprise multiple control channel elements, and an allocation pattern of the control channel elements in the at least one resource block pair is bound to the DM RS port; performing channel estimation using all DM RSs received on the at least one resource block pair; and demodulating the signal received on the downlink control channel resources in the at least one resource block pair using a result of the channel estimation, to obtain a downlink control channel. ### Claim 2 (depends on 1) The method according to claim 1, wherein the at least one resource block pair is one resource block pair. ### Claim 3 (depends on 1) The method according to claim 1, wherein the at least one resource block pair is at least two resource block pairs, and the at least two resource block pairs corresponds to one DM RS port. ### Claim 4 (depends on 3) The method according to claim 3, wherein the at least two resource block pairs are continuous PRB pairs. ### Claim 5 A device for receiving a downlink control channel, comprising: a processor; and a non-transitory memory, wherein the memory stores an execution instruction; and when the processor executes the execution instruction to enable the device to perform the following steps: receiving, using a DM RS port, a signal on at least one resource block pair, each of the at least one resource block pair comprises downlink control channel resources and demodulation reference DM RS resources, the downlink control channel resources comprise multiple control channel elements, and an allocation pattern of the control channel elements in the at least one resource block pair is bound to the DM RS port; performing channel estimation using all DM RSs received on the at least one resource block pair; and demodulating the signal received on the downlink control channel resources in the at least one resource block pair using a result of the channel estimation, to obtain a downlink control channel. ### Claim 6 (depends on 5) The device according to claim 5, wherein the at least one resource block pair is one resource block pair. ### Claim 7 (depends on 5) The device according to claim 5, wherein the at least one resource block pair is at least two resource block pairs, and the at least two resource block pairs corresponds to one DM RS port. ### Claim 8 (depends on 7) The device according to claim 7, wherein the at least two resource block pairs are continuous PRB pairs. ### Claim 9 A non-transitory computer-readable medium storing processor-executable instructions, the processor-executable instructions, when executed by a processor, facilitating performance of a data transmission method, the data transmission method comprising: receiving, using a DM RS port, a signal on at least one resource block pair, each of the at least one resource block pair comprises downlink control channel resources and demodulation reference DM RS resources, the downlink control channel resources comprise multiple control channel elements, and an allocation pattern of the control channel elements in the at least one resource block pair is bound to the DM RS port; performing channel estimation using all DM RSs received on the at least one resource block pair; and demodulating the signal received on the downlink control channel resources in the at least one resource block pair using a result of the channel estimation, to obtain a downlink control channel. ### Claim 10 (depends on 9) The non-transitory computer-readable medium according to claim 9, wherein the at least one resource block pair is one resource block pair. ### Claim 11 (depends on 9) The non-transitory computer-readable medium according to claim 9, wherein the at least one resource block pair is at least two resource block pairs, and the at least two resource block pairs corresponds to one DM RS port. ### Claim 12 (depends on 11) The non-transitory computer-readable medium according to claim 11, wherein the at least two resource block pairs are continuous PRB pairs.