Method for managing multicast group in mobile communication system
First Claim
1. A method for managing a multicast group in a mobile communication system providing a multimedia broadcast/multicast service (MBMS) to a multicast group consisting of a plurality of terminals, comprising:
- comparing movement information of a terminal and multicast group member information and determining whether to selectively notify a core network of the movement of the terminal based on the comparison, thereby minimizing unnecessary signaling from a network controller (RNC) to a core network,wherein if the terminal is moved to a multicast area (MA) that the RNC manages and the corresponding MA can provide an MBMS service, the RNC updates the multicast group member information and does not notify the core network of the movement of the terminal.
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Abstract
A multicast service of a 3GPP Universal Mobile Telecommunications System (UMTS) is disclosed. By allowing an RNC to manage multicast group member information by multicast services on multicast areas, when a user terminal being currently provided with an MBMS service moves, the RNC sends information on the movement of the terminal to a core network. Since the RNC notifies the core network of the terminal'"'"'s movement selectively on the basis of the multicast group member information by multicast services on the multicast area, the network resource can be effectively used, and especially, unnecessary transmission of terminal'"'"'s movement information from the RNC to the multicast group managing entity of the core network can be prevented.
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Citations
21 Claims
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1. A method for managing a multicast group in a mobile communication system providing a multimedia broadcast/multicast service (MBMS) to a multicast group consisting of a plurality of terminals, comprising:
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comparing movement information of a terminal and multicast group member information and determining whether to selectively notify a core network of the movement of the terminal based on the comparison, thereby minimizing unnecessary signaling from a network controller (RNC) to a core network, wherein if the terminal is moved to a multicast area (MA) that the RNC manages and the corresponding MA can provide an MBMS service, the RNC updates the multicast group member information and does not notify the core network of the movement of the terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method for managing a multicast group in a mobile communication system providing a multimedia broadcast/multicast service (MBMS) to a multicast group consisting of a plurality of terminals, comprising
receiving an initial value of multicast group member information from a multicast group managing entity of a core network; -
determining movement information of the terminal when the terminal is moved between multicast areas (MAs); comparing by a network controller (RNC), the movement information of the terminal and the multicast group member information; and selectively notifying the core network of the movement of the terminal by a network controller (RNC) according to the comparing, wherein if the terminal is moved to a multicast area (MA) that the RNC manages and the corresponding MA can provide an MBMS service the RNC updates the multicast group member information and does not notify the core network of the movement of the terminal. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A method of managing a multicast group in a mobile communication system providing a multimedia broadcast/multicast service (MBMS) to a multicast group consisting of a plurality of terminals, comprising:
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detecting a movement of a terminal with respect to multicast areas (MAs); determining whether the moved terminal belongs to a same multicast area or a different multicast area; determining whether the moved terminal is handled by a same network controller (RNC) or a different RNC; determining whether a multicast area of the moved terminal provides a same MBMS service or a different MBMS service; defining movement information of the terminal based upon all three said determining; and conditionally notifying a core network of the movement of the terminal according to the defined movement information of the terminal. - View Dependent Claims (19, 20)
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21. A method of multicast data in a mobile communication system providing a multimedia broadcast/multicast service (MBMS), the method comprising:
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receiving a service announcement and a service notification provided by a network; registering a multicast group to receive a specific multicast service; receiving the specific multicast data from a core network via a network controller (RNC) after registering; moving from one location to other location while receiving the specific multicast data; wherein, after the moving, the RNC performs; determining whether the moved terminal belongs to a same multicast area or a different multicast area; determining whether the moved terminal is handled by a same RNC or a different RNC; determining whether a multicast area of the moved terminal provides a same MBMS service or a different MBMS service; defining movement information of the terminal based upon all three said determining; conditionally notifying a core network of the movement of the terminal according to the defined movement information of the terminal; and continuously receiving the specific multicast data from a core network without any interruption from a network.
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Specification