System and method for efficient push-to-talk communications
First Claim
1. A method comprising:
- receiving a cellular wireless telephone network PTT session initiation;
identifying a plurality of common PTT session mobile stations in close proximity as a common PTT group in response to the cellular wireless telephone network PTT session initiation;
assigning a shared forward link channel to the common PTT group;
transmitting a PTT statement on the shared channel via the shared forward link channel;
comparing a number of members in the common PTT group to an overall number of mobile stations using forward link traffic channels in a sector to establish a PTT forward call ratio;
comparing the PTT forward call ratio to a threshold; and
if the PTT forward call ratio exceeds the threshold, permitting higher data rates in the forward link to requesting mobile stations in the sector.
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Abstract
A system and method are provided for efficient push-to-talk (PTT) communications in a cellular network of wireless telephones. The method comprises the steps of: receiving a PTT session initiation in a cellular wireless telephone network; identifying a plurality of common PTT session mobile stations in close proximity as a group; assigning a shared forward link channel to the group; and transmitting a PTT statement on the shared channel via the forward link. The shared channel can be a shared traffic channel or a common channel, such as a broadcast channel, forward common control channel, or paging channel. The shared forward link channel may be in either a circuit-switched or IP packet data system. Further, the shared forward link channel, in addition to including a shared forward fundamental channel, may also include a shared forward supplemental channel.
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Citations
21 Claims
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1. A method comprising:
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receiving a cellular wireless telephone network PTT session initiation; identifying a plurality of common PTT session mobile stations in close proximity as a common PTT group in response to the cellular wireless telephone network PTT session initiation; assigning a shared forward link channel to the common PTT group; transmitting a PTT statement on the shared channel via the shared forward link channel; comparing a number of members in the common PTT group to an overall number of mobile stations using forward link traffic channels in a sector to establish a PTT forward call ratio; comparing the PTT forward call ratio to a threshold; and if the PTT forward call ratio exceeds the threshold, permitting higher data rates in the forward link to requesting mobile stations in the sector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A mobile station operating in cellular network including a base station, the mobile station comprising:
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a transceiver configured to; receive a shared forward link channel assignment assigning a shared forward link channel to the mobile station and at least one other mobile station based, at least partially, on the proximity of the mobile station to the at least one other mobile station; receive a PTT statement on the shared forward link channel transmitted from the base station and received by the at least one other mobile station. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20)
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21. A method comprising:
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receiving a cellular wireless telephone network PTT session initiation; identifying a plurality of common PTT session mobile stations in close proximity as a common PTT group in response to the cellular wireless telephone network PTT session initiation; assigning a shared forward link channel to the common PTT group; transmitting a PTT statement on the shared channel via the shared forward link channel; receiving a second PTT statement after the PTT statement transmission; wherein identifying the plurality of common PTT session mobile stations further comprises re-identifying a second plurality of common PTT session mobile stations as a re-identified common PTT group; wherein assigning the shared forward link channel comprises assigning a second shared forward link channel to the re-identified common PTT group; and wherein transmitting the PTT statement comprises transmitting the second PTT statement on the second shared forward link channel.
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Specification