# US 11,122,550 B2 · Method and apparatus for controlling specific service in network congestion state in wireless communication system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,122,550 B2 - Document ID: US11122550B2 - Status: Granted - Kind: B2 - Application number: 15/933,177 - Filed: 2018-03-22 - Published: 2018-08-02 - Granted: 2021-09-14 - Earliest claimed: 2012-09-14 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sang Soo Jeong; Song Yean Cho; Han Na Lim; Jin Uk Lee - Web page: https://patentgrep.com/patent/US11122550B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 47/2433: {Allocation of priorities to traffic types} - H04L 47/28: in relation to timing considerations - H04L 61/103: across network layers, e.g. resolution of network layer into physical layer addresses or address resolution protocol [ARP] - H04M 15/57: {for integrated multimedia messaging subsystem [IMS]} - H04W 28/0268: {using specific QoS parameters for wireless networks, e.g. QoS class identifier [QCI] or guaranteed bit rate [GBR] (negotiating SLA or negotiating QoS H04W28/24)} - H04W 28/12: using signalling between network elements - H04W 68/00: User notification, e.g. alerting and paging, for incoming communication, change of service or the like - H04W 68/12: Inter-network notification - H04W 28/0289: {Congestion control (load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)} - H04W 48/02: Access restriction performed under specific conditions - H04W 68/02: Arrangements for increasing efficiency of notification or paging channel - H04W 88/16: Gateway arrangements - 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) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract The present invention relates to a method and apparatus for controlling a specific service in a network congestion state in a wireless communication system. Particularly, the method for controlling a service by a base station in a wireless communication system according to the present invention comprises: a step of receiving a paging message from a mobility management entity (MME) when a certain terminal generates a downlink packet; a step of checking the setup state of the core network domain included in the paging message; and a paging processing step of, if the core network domain is set as a packet-based voice call service, processing the paging message as a priority. ## Claims ### Claim 1 A method performed by a gateway in a communication system, the method comprising: receiving, from a core network node, a downlink packet including header information, the header information including a value identifying an internet protocol (IP) multimedia subsystem (IMS) service; generating a downlink data notification message including paging policy information, the paging policy information including the value identifying the IMS service; and transmitting, to a mobility management entity, the downlink data notification message, wherein the paging policy information indicates that the mobility management entity identifies a paging strategy for the IMS service based on the paging policy information, and wherein the paging strategy includes information on a retransmission associated with a paging. ### Claim 2 (depends on 1) The method of claim 1, wherein the paging strategy for the IMS service is used to perform a procedure associated with the paging by the mobility management entity. ### Claim 3 (depends on 1) The method of claim 1, wherein the paging strategy for the IMS service is configured in the mobility management entity based on the paging policy information. ### Claim 4 (depends on 1) The method of claim 1, wherein the paging policy information is associated with a quality of service class identifier (QCI) 5. ### Claim 5 A gateway in a communication system, the gateway comprising: a transceiver; and a controller coupled with the transceiver and configured to: receive, from a core network node, a downlink packet including header information, the header information including a value identifying an internet protocol (IP) multimedia subsystem (IMS) service, generate a downlink data notification message including paging policy information, the paging policy information including the value identifying the IMS service, and transmit, to a mobility management entity, the downlink data notification message, wherein the paging policy information indicates that the mobility management entity identifies a paging strategy for the IMS service based on the paging policy information, and wherein the paging strategy includes information on a retransmission associated with a paging. ### Claim 6 (depends on 5) The gateway of claim 5, wherein the paging strategy for the IMS service is used to perform a procedure associated with the paging by the mobility management entity. ### Claim 7 (depends on 5) The gateway of claim 5, wherein the paging strategy for the IMS service is configured in the mobility management entity based on the paging policy information. ### Claim 8 (depends on 5) The gateway of claim 5, wherein the paging policy information is associated with a quality of service class identifier (QCI) 5. ### Claim 9 A method performed by a mobility management entity in a communication system, the method comprising: receiving, from a gateway, a downlink data notification message for a downlink packet; identifying that the downlink data notification message includes paging policy information, the paging policy information including a value identifying an internet protocol (IP) multimedia subsystem (IMS) service; identifying a paging strategy for the IMS service based on the paging policy information, the paging strategy including information on a retransmission associated with a paging; and performing a procedure associated with the paging based on the paging strategy, wherein the value identifying the IMS service is included in header information of the downlink packet transmitted from a core network node to the gateway. ### Claim 10 (depends on 9) The method of claim 9, wherein the paging policy information is associated with a quality of service class identifier (QCI) 5. ### Claim 11 (depends on 9) The method of claim 9, wherein the downlink packet includes general packet radio service tunneling protocol user plane (GTP-U) packet. ### Claim 12 A mobility management entity in a communication system, the mobility management entity comprising: a transceiver; and a controller coupled with the transceiver and configured to: receive, from a gateway, a downlink data notification message for a downlink packet, identify that the downlink data notification message includes paging policy information, the paging policy information including a value identifying an internet protocol (IP) multimedia subsystem (IMS) service, identify a paging strategy for the IMS service based on the paging policy information, the paging strategy including information on a retransmission associated with a paging, and perform a procedure associated with the paging based on the paging strategy, wherein the value identifying the IMS service is included in header information of the downlink packet transmitted from a core network node to the gateway. ### Claim 13 (depends on 12) The mobility management entity of claim 12, wherein the paging policy information is associated with a quality of service class identifier (QCI) 5. ### Claim 14 (depends on 12) The mobility management entity of claim 12, wherein the downlink packet includes general packet radio service tunneling protocol user plane (GTP-U) packet. ### Claim 15 (depends on 1) The method of claim 1, wherein the paging strategy for the IMS service is different from a paging strategy for other service. ### Claim 16 (depends on 5) The gateway of claim 5, wherein the paging strategy for the IMS service is different from a paging strategy for other service. ### Claim 17 (depends on 9) The method of claim 9, wherein the paging strategy for the IMS service is different from a paging strategy for other service. ### Claim 18 (depends on 12) The mobility management entity of claim 12, wherein the paging strategy for the IMS service is different from a paging strategy for other service.