Session control using a multicast address
AssigneeMotorola, Inc.
InventorsJheroen P. Dorenbosch, Niranjan N. Segal
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Abstract
A method (800, 900) and apparatus (1001) for controlling a session between communication units (141-146) sharing a group Internet Protocol (IP) multicast address. The method includes determining communication units from which a response to a session initiation protocol (SIP) control message is not required and preparing the control message which is sent to the communication units using the group address with information used to control from which of the of communication units the response is required. The SIP control message is sent to a second communication unit using a unicast address indicating that the response is required.
Claims20
A method for controlling a group call session between a plurality of communication units sharing a group address, the group call session controlled according to a session initiation protocol (SIP), the SIP specifying an SIP control message capable of being transferred to each of the plurality of communication units at an individual address and a response from the each of the plurality of communication units to the SIP control message, the method comprising:
- determining a first one or more of the plurality of communication units from which the response to the SIP control message associated with the SIP is not required;
- and
- preparing the SIP control message using the group address including information associated with the first one or more.
An apparatus for controlling a group call session between a plurality of communication units, the group call session controlled according to a session initiation protocol (SIP), the protocol specifying an SIP control message capable of being transferred to each of the plurality of communication units at an individual address and a response from the each of the plurality of communication units to the SIP control message, the apparatus comprising:
- a memory;
- and
- a processor coupled to the memory, the processor configured to:
- determine that the plurality of communication units share a group address;
- and
- send the SIP control message to the plurality of communication units using the group address, the SIP control message specifying one or more of the plurality of communication units from which the response is not required.
A method for controlling a group call session between a plurality of communication units at least some of the plurality of communication units sharing a group address, the group call session controlled according to a session initiation protocol (SIP), the SIP specifying an SIP control message capable of being transferred to each of the plurality of communication units at an individual address and a response from the each of the plurality of communication units to the SIP control message, the method comprising:
- determining a group of the plurality of communication units sharing the group address and one or more of the plurality of communication units not sharing the group address from which the response to the SIP control message associated with the SIP is not required;
- and
- preparing a first one of the SIP control message using the group address and a second one of the SIP control message using one or more respective individual addresses for the one or more of the plurality of communication units, the first SIP control message including first information associated with the group and the second SIP control message including second information associated with one of the group and the one or more of the plurality of communication units.
Dependencies are inferred from the claim text.