# US 10,375,699 B2 · Dynamic control method and device of SCell in mobile communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,375,699 B2 - Document ID: US10375699B2 - Status: Granted - Kind: B2 - Application number: 15/551,511 - Filed: 2016-02-29 - Published: 2018-02-01 - Granted: 2019-08-06 - Earliest claimed: 2015-02-27 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Namryul Jeon; Hyojoon Kim; Hanseok Kim; Wook Kim - Web page: https://patentgrep.com/patent/US10375699B2 ## CPC - H04W 72/52: based on load - H04L 43/16: Threshold monitoring - H04W 24/00: Supervisory, monitoring or testing arrangements - H04W 24/02: Arrangements for optimising operational condition - H04W 24/10: Scheduling measurement reports {; Arrangements for measurement reports} - 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 72/04: Wireless resource allocation - H04W 72/542: using measured or perceived quality - H04W 88/02: Terminal devices - H04W 88/08: Access point 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 Provided is a method of configuring a secondary cell (SCell) for a base station (eNB) in a mobile communication system. The method may include: identifying the carrier aggregation (CA) operation mode; identifying the amount of traffic for a user equipment (UE); determining whether to add an SCell in the UE on the basis of the CA operation mode and the traffic amount for the UE; and transmitting an SCell addition request message to the UE according to the determination result. There is also provided a base station applying the above method. In addition, there are provided a user equipment communicating with the base station and an SCell configuration method for the user equipment. ## Claims ### Claim 1 A method of configuring a secondary cell (SCell) for a base station (eNB) in a mobile communication system, the method comprising: identifying a carrier aggregation (CA) operation mode determined based on whether to use a measurement report received from a user equipment (UE) to determine addition or release of the SCell; identifying an amount of traffic for the UE; determining whether to add the SCell in the UE based on the CA operation mode and the traffic amount for the UE; and transmitting an SCell addition request message to the UE according to the determination. ### Claim 2 (depends on 1) The method of claim 1, wherein the CA operation mode comprises a first mode where whether to add an SCell is determined according to a primary cell (PCell) addition and a PCell release, and a second mode where whether to add an SCell is determined according to a PCell addition and a measurement report from the UE. ### Claim 3 A base station (eNB) in a mobile communication system, comprising: a transceiver configured to transmit and receive signals; and a controller configured to: control a process of identifying a carrier aggregation (CA) operation mode determined based on whether to use a measurement report received from a user equipment (UE) to determine addition or release of a secondary cell (S Cell), identify an amount of traffic for the UE, determine whether to add the SCell in the UE based on the CA operation mode and the traffic amount for the UE, and control the transceiver to transmit an SCell addition request message to the UE according to the determination result. ### Claim 4 (depends on 3) The base station of claim 3, wherein the CA operation mode comprises a first mode where whether to add an SCell is determined according to a primary cell (PCell) addition and a PCell release, and a second mode where whether to add an SCell is determined according to a PCell addition and a measurement report from the UE. ### Claim 5 (depends on 4) The base station of claim 4, wherein, when the CA operation mode is the first mode, the controller is further configured to control a process of: determining to add an SCell if the traffic amount is greater than or equal to a preset traffic threshold for adding the SCell, and determining to release an SCell if the traffic amount is less than a preset traffic threshold for releasing the SCell. ### Claim 6 (depends on 4) The base station of claim 4, wherein, when the CA operation mode is the second mode, the controller is further configured to control a process of: transmitting a measurement report configuration request message to the UE based on the traffic amount and the SCell addition; and receiving a measurement report message from the UE, wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and no SCell is configured, the measurement report configuration request message requests the UE to transmit a measurement report message when a reference signal measurement of the UE is greater than or equal to a preset first threshold, and wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and an SCell is configured, the measurement report configuration request message requests the UE to transmit a measurement report message when the reference signal measurement of the UE is less than a preset second threshold. ### Claim 7 (depends on 6) The base station of claim 6, wherein, upon reception of the measurement report message, the controller is further configured to control a process of determining, if no SCell is configured, to add an SCell, and determining, if an SCell is configured, to release the SCell. ### Claim 8 A method of configuring a secondary cell (SCell) for a user equipment (UE), the method comprising: maintaining a connection to at least one cell of a base station (eNB); determining whether to perform a cell measurement based on a carrier aggregation (CA) operation mode to determine addition or release of the SCell; receiving an SCell addition request message for the UE from the eNB; and configuring an SCell in the UE based on the SCell addition request message, wherein the SCell addition request message is based on the CA operation mode and an amount of traffic for the UE. ### Claim 9 (depends on 8) The method of claim 8, wherein the CA operation mode comprises a first mode where whether to add an SCell is determined according to a primary cell (PCell) addition and a PCell release, and a second mode where whether to add an SCell is determined according to a PCell addition and a measurement report from the UE. ### Claim 10 (depends on 9) The method of claim 9, wherein, when the CA operation mode is the first mode, the SCell addition request message requests the UE to add an SCell if the traffic amount is greater than or equal to a preset traffic threshold for adding the SCell, and wherein, when the CA operation mode is the first mode, the SCell addition request message requests the UE to release an SCell if the traffic amount is less than a preset traffic threshold for releasing the SCell. ### Claim 11 (depends on 9) The method of claim 9, further comprising, when the CA operation mode is the second mode: receiving a measurement report configuration request message from the eNB; performing a reference signal measurement in response to the measurement report configuration request message; and transmitting a measurement report message to the eNB based on the reference signal measurement, wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and no SCell is configured, the measurement report configuration request message requests the UE to transmit the measurement report message when a reference signal measurement of the UE is greater than or equal to a preset first threshold, and wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and an SCell is configured, the measurement report configuration request message requests the UE to transmit the measurement report message when the reference signal measurement of the UE is less than a preset second threshold. ### Claim 12 A user equipment (UE) comprising: a transceiver configured to transmit and receive signals; and a controller configured to control a process of: maintaining a connection to at least one cell of a base station (eNB), receiving a secondary cell (SCell) addition request message from the eNB, determining whether to perform a cell measurement based on a carrier aggregation (CA) operation mode to determine addition or release of the SCell, and configuring an SCell in the UE based on the SCell addition request message, wherein the SCell addition request message is determined based on a carrier aggregation (CA) operation mode and an amount of traffic for the UE. ### Claim 13 (depends on 12) The user equipment of claim 12, wherein the CA operation mode comprises a first mode where whether to add an SCell is determined according to a primary cell (PCell) addition and a PCell release, and a second mode where whether to add an SCell is determined according to a PCell addition and a measurement report from the UE. ### Claim 14 (depends on 13) The user equipment of claim 13, wherein, when the CA operation mode is the first mode, the SCell addition request message requests the UE to add an SCell if the traffic amount is greater than or equal to a preset traffic threshold for adding the SCell, and wherein, when the CA operation mode is the first mode, the SCell addition request message requests the UE to release an SCell if the traffic amount is less than a preset traffic threshold for releasing the SCell. ### Claim 15 (depends on 13) The user equipment of claim 13, wherein, when the CA operation mode is the second mode, the controller is configured to control a process of: receiving a measurement report configuration request message from the eNB, performing a reference signal measurement in response to the measurement report configuration request message, and transmitting a measurement report message to the eNB based on the reference signal measurement, wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and no SCell is configured, the measurement report configuration request message requests the UE to transmit the measurement report message when a reference signal measurement of the UE is greater than or equal to a preset first threshold, and wherein, if the traffic amount is greater than or equal to the traffic threshold for adding the SCell and an SCell is configured, the measurement report configuration request message requests the UE to transmit the measurement report message when the reference signal measurement of the UE is less than a preset second threshold.