# US 2014/0192704 A1 · Method and apparatus for indicating downlink channel measurement and method and apparatus performing downlink channel measurement in a relaying system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0192704 A1 - Document ID: US20140192704A1 - Status: Published application - Kind: A1 - Application number: 13/879,320 - Filed: 2011-08-05 - Published: 2014-07-10 - Earliest claimed: 2011-08-05 - Assignees: NEC (China) Co., Ltd. - Inventors: Su Yi; Yu Zhang; Zhennian Sun; Ming Lei - Web page: https://patentgrep.com/patent/US20140192704A1 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - 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 provides a method and apparatus for indicating downlink channel measurement and a method and apparatus for performing channel measurement. The method for indicating downlink channel measurement comprises: receiving information on interferes of a user equipment; generating, based on downlink subframe configuration information, a downlink channel measurement indication for each of possible combinations of the interferers, wherein the channel measurement indication is adapted to indicate a subframe group to be measured by a user equipment; and sending the downlink channel measurement indication to the user equipment so as to indicate the user equipment to perform corresponding downlink channel measurement. According to embodiments of the present invention, the subframe groups that are required to be measured by the user equipment may be determined with respect to possible combinations of interferers corresponding to different levels of interference. Thus, the user equipment may perform channel measurement for respective subframe groups. Therefore, the channel quality as determined in such way will be more accurate and reliable and better match the actual channel condition. Moreover, it also provides a possibility for the serving node to perform the scheduling more accurately and effectively. ## Claims ### Claim 1 A method of indicating downlink channel measurement in a relaying system, comprising receiving information on interferers of a user equipment; generating, based on downlink subframe configuration information, a downlink channel measurement indication for each of possible combinations of the interferers, wherein the downlink channel measurement indication is configured to indicate a subframe group to be measured by the user equipment, sending the downlink channel measurement indication to the user equipment so as to indicate the user equipment to perform a corresponding downlink channel measurement. ### Claim 2 (depends on 1) The method according to claim 1, further comprising forming the possible combinations of the interferers for the user equipment. ### Claim 3 (depends on 1) The method according to claim 1, further comprising receiving the downlink subframe configuration information of neighboring cells. ### Claim 4 (depends on 1) The method according to claim 1, wherein the downlink subframe configuration information is represented by bitmaps, and wherein the channel measurement indication is generated by performing, based on a type of the user equipment and properties of the interferers, a logic operation on the bitmaps representing corresponding downlink subframe configuration information. ### Claim 5 (depends on 4) The method according to claim 4, wherein the channel measurement indication is represented by a bitmap. ### Claim 6 (depends on 1) The method according to claim 1, wherein the downlink subframe configuration information comprises information on backhaul subframe configuration and information on almost blank subframe configuration. ### Claim 7 (depends on 1) The method according to claim 1, wherein the interferers are dominant interferes of the user equipment. ### Claim 8 (depends on 1) The method according to claim 1, further comprising: performing scheduling for each subframe based on the channel quality for the subframe group reported by the user equipment. ### Claim 9 An apparatus for indicating downlink channel measurement in a relaying system, comprising interferer information receiving unit, for receiving information on interferers of a user equipment; measurement indication generation unit, for generating, based on downlink subframe configuration information, a downlink channel measurement indication for each of possible combinations of the interferers, wherein the downlink channel measurement indication is configured to indicate a subframe group to be measured by the user equipment, measurement indication sending unit, for sending the downlink channel measurement indication to the user equipment so as to indicate the user equipment to perform a corresponding downlink channel measurement. ### Claim 10 (depends on 9) The apparatus according to claim 9, further comprising interferer combination formation unit, for forming the possible combinations of the interferers for the user equipment. ### Claim 11 (depends on 9) The apparatus according to claim 9, further comprising configuration information receiving unit, for receiving the downlink subframe configuration information of neighboring cells. ### Claim 12 (depends on 9) The apparatus according to claim 9, wherein the downlink subframe configuration information is represented by bitmaps, and wherein the measurement indication generation unit is configured for generating the channel measurement indication by performing, based on a type of the user equipment and properties of the interferers, a logic operation on the bitmaps representing corresponding downlink subframe configuration information. ### Claim 13 (depends on 12) The apparatus according to claim 12, wherein the channel measurement indication is represented by a bitmap. ### Claim 14 (depends on 9) The apparatus according to claim 9, wherein the downlink subframe configuration information comprises information on backhaul subframe configuration and information on almost blank subframe configuration. ### Claim 15 (depends on 9) The apparatus according to claim 9, wherein the interferers are dominant interferes of the user equipment. ### Claim 16 (depends on 9) The apparatus according to claim 9, further comprising: scheduling unit for performing scheduling for each subframe based on the channel quality for the subframe group reported by the user equipment. ### Claim 17 A method of performing downlink channel measurement in a relaying system, comprising reporting information on interferers of a user equipment to its serving node, receiving a downlink channel measurement indication from the serving node, wherein the downlink channel measurement indication is adapted to indicate a subframe group to be measured by the user equipment, performing the downlink channel measurement for the subframe group based on the downlink channel measurement indication. ### Claim 18 (depends on 17) The method according to claim 17, comprising determining the channel quality for the subframe group from the downlink channel measurement, sending to the serving node the channel quality for the subframe group. ### Claim 19 An apparatus for performing downlink channel measurement in a relaying system, comprising interferer information reporting unit, for reporting information on interferers of a user equipment to its serving node, measurement indication receiving unit, for receiving a downlink channel measurement indication from the serving node, wherein the downlink channel measurement indication is adapted to indicate a subframe group to be measured by the user equipment, channel measurement unit, for performing the downlink channel measurement for the subframe group based on the downlink channel measurement indication. ### Claim 20 (depends on 19) The apparatus according to claim 19, comprising channel quality determination unit, for determining the channel quality for the subframe group from the downlink channel measurement, channel quality sending unit, for sending to the serving node the channel quality for the subframe group.