Method and system for setting up a call in a mobile communication system supporting PTT service
First Claim
1. A method for setting up a call in a mobile communication system supporting a Push-To-Talk (PTT) service in association with a radio access network (RAN) and an Internet Protocol (IP) network, the method comprising the steps of:
- (a) if an access terminal (AT) in a group logs on, performing session setup with a server providing the PTT service using a multicast protocol; and
(b) after the session setup, performing a group call between ATs in the group using a shared channel in the RAN between an access network (AN) and the AT.
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Accused Products
Abstract
A method and system for providing a Push-To-Talk (PTT) service in association with a Radio Access Network (RAN) and an Internet Protocol (IP) network are provided. Each of access terminals (ATs) supporting the PTT service is allocated a multicast IP during session setup, and joins in a chat room for a group for the PTT service using a multicast protocol message. Each of access networks (ANs) allocates a shared channel to the RAN to process a group call between ATs in the group if the AT is an AT in the group. A PTT system performs session setup with the AT, allocates information including a multicast IP allocated to the group of the AT during the session setup, and after the session setup, provides the PTT service between the ATs in the group using a routing protocol for the multicast IP in the IP network. Each router configures a multicast tree of the group, and upon receiving transmission data from the AT, transmits the data to the ATs in the group according to the multicast tree.
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Citations
14 Claims
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1. A method for setting up a call in a mobile communication system supporting a Push-To-Talk (PTT) service in association with a radio access network (RAN) and an Internet Protocol (IP) network, the method comprising the steps of:
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(a) if an access terminal (AT) in a group logs on, performing session setup with a server providing the PTT service using a multicast protocol; and
(b) after the session setup, performing a group call between ATs in the group using a shared channel in the RAN between an access network (AN) and the AT. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for providing a Push-To-Talk (PTT) service in association with a Radio Access Network (RAN) and an Internet Protocol (IP) network, comprising:
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a plurality of access terminals (ATs) supporting the PTT service, for receiving a multicast IP allocated thereto during session setup, and joining in a chat room for a group for the PTT service using a multicast protocol message;
a plurality of access networks (ANs) for allocating a shared channel to the RAN to process a group call between ATs in the group if the AT is an AT in the group;
a plurality of PTT systems for performing session setup with the AT, allocating information including a multicast IP allocated to the group of the AT during the session setup, and after the session setup, providing the PTT service between the ATs in the group using a routing protocol for the multicast IP in the IP network; and
a plurality of routers for configuring a multicast tree of the group, and upon receiving transmission data from the AT, transmitting the data to the ATs in the group according to the multicast tree. - View Dependent Claims (12, 13, 14)
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Specification