# US 9,521,008 B2 · Method and device for receiving a multimedia broadcast multicast service in a 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 9,521,008 B2 - Document ID: US9521008B2 - Status: Granted - Kind: B2 - Application number: 14/347,854 - Filed: 2012-10-10 - Published: 2014-08-21 - Granted: 2016-12-13 - Earliest claimed: 2011-10-10 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Soeng-Hun Kim; Kyeong-In Jeong - Web page: https://patentgrep.com/patent/US9521008B2 ## CPC - H04L 12/189: {in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06)} - H04L 12/1881: {with schedule organisation, e.g. priority, sequence management} - H04W 36/06: Reselecting a communication resource in the serving access point - H04W 4/06: Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services - H04W 36/0007: {for multicast or broadcast services, e.g. MBMS (multicast or broadcast application services H04W4/06; resource management for broadcast services H04W72/30; connection management for selective distribution or broadcast H04W76/40)} - H04W 36/22: for handling the traffic - H04W 48/18: Selecting a network or a communication service - H04W 72/30: Resource management for broadcast services - H04W 76/40: for selective distribution or broadcast - Y02D 30/70: in wireless communication networks - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - Y02D: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE ## Abstract The present invention relates to a method and device for receiving a multimedia broadcast multicast service (MBMS) in a mobile communication system. The method for receiving the MBMS of a terminal in the mobile communication system according to an embodiment of the present invention is characterized in that it includes: determining whether service area ID (SAI) information on a serving cell is broadcast during the MBMS; receiving the SAI information on the serving cell when it is determined that the SAI information is broadcast; determining, by using the received SAI information of the serving cell, whether an SAI of the MBMS matches the SAI of the serving cell; and changing the cell reselection priority of the frequency of the serving cell to the highest priority if it is determined that the SAI of the MBMS matches the SAI of the serving cell. According to the present invention, it is possible to efficiently receive MBMS services by enabling a terminal to select a proper frequency or cell when an MBMS service of interest starts. ## Claims ### Claim 1 A method for receiving multimedia broadcast multicast service (MBMS) by a terminal in a mobile communication system, the method comprising: obtaining MBMS information including at least one MBMS service area identifier (SAI); receiving a service area identifier (SAI) of a serving cell through a system information block (SIB); determining whether the SAI of the serving cell corresponds to an MBMS SAI included in the MBMS information; configuring a cell reselection priority of a frequency corresponding to the SAI of the serving cell to a highest priority if the SAI of the serving cell corresponds to the MBMS SAI included in the MBMS information, and performing cell reselection based on the cell reselection priority in a radio resource control (RRC) idle state. ### Claim 2 (depends on 1) The method of claim 1, further comprising: configuring a cell reselection priority of a frequency included in the MBMS information to the highest priority if the SAI of the serving cell is not transmitted. ### Claim 3 (depends on 2) The method of claim 2, further comprising waiting, if the frequency in the MBMS information is absent, until the serving cell changes. ### Claim 4 (depends on 1) The method of claim 1, further comprising waiting, if the SAI of the serving cell does not correspond to the MBMS SAI included in the MBMS information, until the serving cell changes. ### Claim 5 A terminal for receiving multimedia broadcast multicast service (MBMS) in a mobile communication system, the terminal comprising: a transceiver configured to transmit and receive a signal; and a controller configured to: obtain MBMS information including at least one MBMS service area identifier (SAI), receive a service area identifier (SAI) of a serving cell through a system information block (SIB), determine whether the SAI of the serving cell corresponds to an MBMS SAI included in the MBMS information, configure a cell reselection priority of a frequency corresponding to the SAI of the serving cell to a highest priority if the SAI of the serving cell corresponds to the MBMS SAI included in the MBMS information, and perform cell reselection based on the cell reselection priority in a radio resource control (RRC) idle state. ### Claim 6 (depends on 5) The terminal of claim 5, wherein the controller is further configured to configure a cell reselection priority of a frequency included in the MBMS information to the highest priority if the SAI of the serving cell is not transmitted. ### Claim 7 (depends on 6) The terminal of claim 6, wherein the controller is further configured to wait, if the frequency in the MBMS information is absent, until the serving cell changes. ### Claim 8 (depends on 5) The terminal of claim 5, wherein the controller is further configured to wait, if the SAI of the serving cell does not correspond to the MBMS SAI included in the MBMS information, until the serving cell changes.