# US 12,114,221 B2 · Method, equipment and system for handing over cell in communication system supporting carrier aggregation > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,114,221 B2 - Document ID: US12114221B2 - Status: Granted - Kind: B2 - Application number: 18/213,285 - Filed: 2023-06-23 - Published: 2023-10-19 - Granted: 2024-10-08 - Earliest claimed: 2010-07-27 - Assignees: Sony Group Corporation - Applicants: Sony Group Corporation - Inventors: Yuxin Wei - Web page: https://patentgrep.com/patent/US12114221B2 ## CPC - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - H04L 5/0007: {the frequencies being orthogonal, e.g. OFDM(A) or DMT} - H04L 5/001: {the frequencies being arranged in component carriers} - H04L 5/0091: {Signalling for the administration of the divided path, e.g. signalling of configuration information} - H04W 24/08: Testing, {supervising or monitoring} using real traffic - H04W 36/08: Reselecting an access point - H04W 36/165: {for reducing network power consumption (H04W36/18 - H04W36/22 take precedence)} - H04W 36/30: by measured or perceived connection quality data - H04W 36/304: {due to measured or perceived resources with higher communication quality} - H04W 36/38: by fixed network equipment - H04W 72/541: using the level of interference - H04W 72/542: using measured or perceived quality - H04W 76/19: Connection re-establishment - H04W 76/27: Transitions between radio resource control [RRC] states - H04W 36/00692: {using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] (allocation of physical resources in CoMP or in CA H04L5/0035)} - H04W 72/00: Local resource management - 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, an equipment and a system for handing over a cell in a communication system supporting carrier aggregation. The method includes: when a terminal in the communication system moves to the edge of the currently serving cell, the terminal selects one or more neighbor cells from one or more neighbor cells as measurement objects according to the carrier aggregation manner of the one or more neighbor cells; the terminal measures the capabilities of the measurement objects, and obtains one or more measurement results; and the terminal sends a source base station which currently serving the terminal one or more measurement results as capability measurement reports of the one or more neighbor cells. Also provided are an equipment for handing over a cell in a communication system supporting carrier aggregation, a terminal including the said equipment and a communication system including the said terminal. ## Claims ### Claim 1 An electronic device comprising a circuit configured to: serve a terminal device in a carrier aggregation manner through a plurality of cells; receive from the terminal device measurement reports for a plurality of neighbor cells; determine, based on the measurement reports, a destination base station to which the terminal device is to be handed over; select one or more candidate cells to be accessed for the terminal device from all cells belonging to the destination base station in the plurality of neighbor cells; and send to the terminal device, a radio resource control (RRC) connection reconfigure message carrying mobility control information which contains information of one or more cells of the cells belonging to the destination base station to be accessed, in order to hand over the terminal device to the destination base station, wherein, the terminal device establishes an access to all cells, of the one or more cells of the cells belonging to the destination base station to be accessed, at a time after being handed over, and enters a carrier aggregation mode immediately upon establishing the access to the all cells, of the one or more cells of the cells belonging to the destination base station to be accessed. ### Claim 2 (depends on 1) The electronic device according to claim 1, wherein the selected one or more cells comprise: a subset of cells belonging to the destination base station that are selected by the circuit based on a selection criteria when all cells belonging to the destination base station are in the same frequency band, or all cells belonging to the destination base station when all cells belonging to the destination base station are not in the same frequency band. ### Claim 3 (depends on 1) The electronic device according to claim 1, wherein the circuit is configured to use one cell, of the one or more cells belonging to the destination base station to be accessed, as a primary cell to be accessed when the one or more cells to be accessed are in different frequency bands, and contain only information of the primary cell to be accessed in the RRC connection reconfigure message, so that the terminal device enters a single cell mode after being handed over. ### Claim 4 (depends on 3) The electronic device according to claim 3, wherein the primary cell to be accessed is a cell, of the one or more cells belonging to the destination base station to be accessed, having a best performance among the one or more cells to be accessed. ### Claim 5 (depends on 3) The electronic device according to claim 3, wherein the primary cell to be accessed is the cell, of the one or more cells belonging to the destination base station to be accessed, whose frequency is the same as that of a currently serving cell of the terminal device among the one or more cells to be accessed. ### Claim 6 (depends on 1) The electronic device according to claim 1, wherein based on the one or more cells to be accessed being in the same frequency band, the circuit is configured to include information of the one or more cells to be accessed in a handover request, and send the handover request to the destination base station for access control estimation. ### Claim 7 (depends on 3) The electronic device according to claim 3, wherein the circuit is further configured to include only the information of the primary cell to be accessed in a handover request, and send the handover request to the destination base station for access control estimation. ### Claim 8 (depends on 7) The electronic device according to claim 7, wherein the electronic device is implemented as a base station. ### Claim 9 An electronic device comprising a circuit configured to: connect with a base station through a plurality of cells for carrier aggregation communication; perform a measurement on a plurality of neighbor cells based on a configuration of the base station; generate a measurement report based on the measurement; send the measurement report to the base station, wherein the base station determines a destination base station to which the electronic device is to be handed over based on the measurement report, and the base station selects one or more candidate cells to be accessed for the terminal device from all cells belonging to the destination base station in the plurality of neighbor cells; and receive, from the base station, a radio resource control (RRC) connection reconfigure message carrying mobility control information which contains information of one or more cells of the cells belonging to the destination base station to be accessed, in order to hand over to the destination base station, wherein, the electronic device establishes an access to all cells, of the one or more cells of the cells belonging to the destination base station to be accessed, at a time after being handed over, and enters a carrier aggregation mode immediately upon establishing the access to the all cells, of the one or more cells of the cells belonging to the destination base station to be accessed. ### Claim 10 (depends on 9) The electronic device according to claim 9, wherein the selected one or more cells comprise: a subset of cells belonging to the destination base station that are selected by the circuit based on a selection criteria when all cells belonging to the destination base station are in the same frequency band, or all cells belonging to the destination base station when all cells belonging to the destination base station are not in the same frequency band. ### Claim 11 (depends on 9) The electronic device according to claim 9, wherein the RRC connection reconfigure message contains only information of one cell, of the one or more cells belonging to the destination base station to be accessed, to be used as a primary cell is received from the base station, when the one or more cells to be accessed are in different frequency bands, so that the electronic device enters a single cell mode after being handed over. ### Claim 12 (depends on 11) The electronic device according to claim 11, wherein the primary cell to be accessed is a cell, of the one or more cells belonging to the destination base station to be accessed, having a best performance among the one or more cells to be accessed. ### Claim 13 (depends on 11) The electronic device according to claim 11, wherein the primary cell to be accessed is the cell, of the one or more cells belonging to the destination base station to be accessed, whose frequency is the same as that of a currently serving cell of the terminal device among the one or more cells to be accessed. ### Claim 14 (depends on 13) The electronic device according to claim 13, wherein the electronic device is implemented as a terminal. ### Claim 15 A communication method performed by a base station, comprising: serving a terminal device in a carrier aggregation manner through a plurality of cells; receiving from the terminal device measurement reports for a plurality of neighbor cells; determining, based on the measurement reports, a destination base station to which the terminal device is to be handed over; selecting one or more candidate cells to be accessed for the terminal device from all cells belonging to the destination base station in the plurality of neighbor cells; and sending to the terminal device a radio resource control (RRC) connection reconfigure message carrying mobility control information which contains information of one or more cells of the cells belonging to the destination base station to be accessed, in order to hand over the terminal device to the destination base station, wherein, the terminal device establishes an access to all cells, of the one or more cells of the cells belonging to the destination base station to be accessed, at a time after being handed over, and enters a carrier aggregation mode immediately upon establishing the access to the all cells, of the one or more cells of the cells belonging to the destination base station to be accessed. ### Claim 16 (depends on 15) The method according to claim 15, wherein the selected one or more cells comprise: a subset of cells belonging to the destination base station that are selected by the circuit based on a selection criteria when all cells belonging to the destination base station are in the same frequency band, or all cells belonging to the destination base station when all cells belonging to the destination base station are not in the same frequency band. ### Claim 17 (depends on 15) The method according to claim 15, wherein the method further comprises using one cell, of the one or more cells belonging to the destination base station to be accessed, as a primary cell to be accessed when the one or more cells to be accessed are in different frequency bands, and containing only information of the primary cell to be accessed in the RRC connection reconfigure message, so that the terminal device enters a single cell mode after being handed over. ### Claim 18 (depends on 17) The method according to claim 17, wherein the primary cell to be accessed is a cell, of the one or more cells belonging to the destination base station to be accessed, having a best performance among the one or more cells to be accessed.