# US 2014/0194124 A1 · Method, apparatus, and system for controlling and measuring cell handover > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0194124 A1 - Document ID: US20140194124A1 - Status: Published application - Kind: A1 - Application number: 14/204,784 - Filed: 2014-03-11 - Published: 2014-07-10 - Earliest claimed: 2011-09-13 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Dengkun XIAO; Jing HAN; Yuxiang ZHANG - Web page: https://patentgrep.com/patent/US20140194124A1 ## CPC - H04W 36/0061: {of neighbour cell information} - H04L 25/03: Shaping networks in transmitter or receiver, e.g. adaptive shaping networks - H04L 25/03949: {equalizer selection or adaptation based on feedback (multiple signaling inclusive of a precoding command for adapting the transmitter H04L1/0031; feedback for transmit diversity systems H04B7/0619; selection of codebook or precoding matrix for MIMO diversity systems H04B7/0456)} - H04W 36/0072: {of resource information of target access point} - H04W 36/0077: {of access information of target access point} - H04W 74/0833: Random access procedures, e.g. with 4-step access - H04W 16/28: using beam steering - 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) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract The present invention discloses a method, an apparatus, and a system for controlling and measuring a cell handover, where the method for controlling a cell handover includes: acquiring terminal information; and after a random access request sent by a terminal is received, performing, according to the terminal information, beamforming for a random access response corresponding to the random access request, and sending the random access response to the terminal, where the random access response includes: configuration information of a resource required by the terminal during communication after the terminal hands over from a source cell covered by a source base station to a target cell covered by a target base station. A success rate of performing a cell handover by the terminal is improved in embodiments of the present invention. ## Claims ### Claim 1 A method for controlling a cell handover, comprising: acquiring terminal information; and after a random access request sent by a terminal is received, performing, according to the terminal information, beamforming for a random access response corresponding to the random access request, and sending the random access response to the terminal, wherein: the random access response comprises: configuration information of a resource required by the terminal during communication after the terminal hands over from a source cell covered by a source base station to a target cell covered by a target base station. ### Claim 2 (depends on 1) The method according to claim 1, wherein the terminal information comprises at least one of the following: (a) location information of the terminal and (b) precoding matrix indication information of the target cell measured by the terminal. ### Claim 3 (depends on 1) The method according to claim 1, wherein the acquiring terminal information comprises: acquiring the terminal information according to a received handover request that is sent by the source base station and comprises the terminal information. ### Claim 4 (depends on 3) The method according to claim 3, wherein the handover request further comprises: information about a low power node that is located in the source cell and serves the terminal; before the performing beamforming for the random access response, the method further comprises: allocating, to the terminal according to the information about the low power node that serves the terminal, the resource required by the terminal during communication after the terminal hands over to the target cell. ### Claim 5 (depends on 1) The method according to claim 1, wherein the method further comprises at least one of the following: (a) receiving first base station configuration update information sent by a neighboring base station, wherein the first base station configuration update information comprises: information about a low power node that is currently located in a neighboring cell covered by the neighboring base station; and(b) when the information about the low power node that is located in a current cell changes, sending second base station configuration update information to the neighboring base station, wherein the second base station configuration update information comprises: current information about the low power node that is currently located in the current cell. ### Claim 6 A method for controlling a cell handover, comprising: acquiring terminal information; and sending the terminal information to a target base station, to enable the target base station to perform, according to the terminal information, beamforming for a random access response of a terminal that hands over from a source cell covered by a source base station to a target cell covered by the target base station. ### Claim 7 (depends on 6) The method according to claim 6, wherein the terminal information comprises at least one of the following: (a) location information of the terminal and (b) precoding matrix indication information of the target cell measured by the terminal. ### Claim 8 (depends on 6) The method according to claim 6, wherein the sending the terminal information to the target base station comprises: sending a handover request to the target base station, wherein the handover request comprises the terminal information. ### Claim 9 (depends on 8) The method according to claim 8, wherein the handover request further comprises: information about a low power node that is located in the source cell and serves the terminal. ### Claim 10 (depends on 7) The method according to claim 7, wherein before the sending precoding matrix indication information of the target cell measured by the terminal to the target base station, the method further comprises: sending a measurement indication that comprises neighboring cell information to the terminal, wherein the measurement indication is used to instruct the terminal to measure precoding matrix indication information of a neighboring cell; and receiving the precoding matrix indication information of the neighboring cell measured by the terminal, wherein the neighboring cell comprises the target cell. ### Claim 11 (depends on 6) The method according to claim 6, wherein the method further comprises at least one of the following: (a) receiving first base station configuration update information sent by a neighboring base station, wherein the first base station configuration update information comprises: information about a low power node that is currently located in a neighboring cell; and (b) when information about the low power node that is located in a current cell changes, sending second base station configuration update information to the neighboring base station, wherein the second base station configuration update information comprises: current information about the low power node that is currently located in the current cell. ### Claim 12 A method for measuring cell information, comprising: receiving a measurement indication that is sent by a source base station and comprises neighboring cell information; and measuring precoding matrix indication information of a neighboring cell according to the neighboring cell information and sending the precoding matrix indication information to the source base station, wherein the neighboring cell comprises a target cell. ### Claim 13 A base station, comprising: an acquiring module, configured to acquire terminal information; a processing module, configured to: after a random access request sent by a terminal is received, perform, according to the terminal information acquired by the acquiring module, beamforming for a random access response corresponding to the random access request; and a sending module, configured to send the random access response for which the beamforming has been performed by the processing module to the terminal, wherein the random access response comprises: configuration information of a resource required by the terminal during communication after the terminal hands over from a source cell covered by a source base station to a target cell covered by a target base station. ### Claim 14 (depends on 13) The base station according to claim 13, wherein the terminal information comprises at least one of the following: (a) location information of the terminal and (b) precoding matrix indication information of the target cell measured by the terminal. ### Claim 15 (depends on 13) The base station according to claim 13, wherein: the acquiring module is configured to acquire the terminal information according to a received handover request that is sent by the source base station and comprises the terminal information. ### Claim 16 (depends on 15) The base station according to claim 15, wherein the handover request further comprises: information about a low power node that is located in the source cell and serves the terminal; the base station further comprising: an allocating module, configured to: before the processing module performs the beamforming for the random access response, allocate, to the terminal according to the information about the low power node that serves the terminal, the resource required by the terminal during communication after the terminal hands over to the target cell. ### Claim 17 (depends on 13) The base station according to claim 13, wherein: the sending module is further configured to: when information about a low power node that is located in a current cell changes, send second base station configuration update information to a neighboring base station, wherein the second base station configuration update information comprises: current information about the low power node that is currently located in the current cell; and/or the base station further comprises: a neighboring base station information receiving module, configured to receive first base station configuration update information sent by a neighboring base station, wherein the first base station configuration update information comprises: current information about a low power node that is currently located in a neighboring cell covered by the neighboring base station. ### Claim 18 A base station, comprising: an acquiring module, configured to acquire terminal information; and a sending module, configured to send the terminal information acquired by the acquiring module to a target base station, to enable the target base station to perform, according to the terminal information, beamforming for a random access response of a terminal that hands over from a source cell covered by a source base station to a target cell covered by the target base station. ### Claim 19 (depends on 18) The base station according to claim 18, wherein the terminal information comprises at least one of the following: (a) location information of the terminal and (b) precoding matrix indication information of the target cell measured by the terminal. ### Claim 20 (depends on 18) The base station according to claim 18, wherein: the sending module is configured to send a handover request to the target base station, wherein the handover request comprises the terminal information. ### Claim 21 (depends on 20) The base station according to claim 20, wherein the handover request further comprises: information about a low power node that is located in the source cell and serves the terminal. ### Claim 22 (depends on 19) The base station according to claim 19, further comprising: a receiving module, wherein: the sending module is further configured to send a measurement indication that comprises neighboring cell information to the terminal, wherein the measurement indication is used to instruct the terminal to measure precoding matrix indication information of a neighboring cell; and the receiving module is configured to receive the precoding matrix indication information of the neighboring cell measured by the terminal, wherein the neighboring cell comprises the target cell. ### Claim 23 (depends on 20) The base station according to claim 20, wherein: the sending module is further configured to: when information about a low power node that is located in a current cell changes, send second base station configuration update information to a neighboring base station, wherein the second base station configuration update information comprises: current information about the low power node that is currently located in the current cell; and/or the base station further comprises: a receiving module, configured to receive first base station configuration update information sent by the neighboring base station, wherein the first base station configuration update information comprises: current information about a low power node that is currently located in a neighboring cell covered by the neighboring base station. ### Claim 24 A terminal, comprising: a receiving module, configured to receive a measurement indication that is sent by a source base station and comprises neighboring cell information; a measuring module, configured to measure precoding matrix indication information of a neighboring cell according to the neighboring cell information comprised in the measurement indication received by the receiving module, wherein the neighboring cell comprises a target cell; and a sending module, configured to send the precoding matrix indication information of the neighboring cell measured by the measuring module to the source base station.