Push-to-talk group call system using CDMA 1x-EVDO cellular network
First Claim
1. A method of communicating with a plurality of wireless access terminals over a wireless network, the method comprising the steps of:
- assigning a floor to a first of said access terminals based on a message received from at least one of said access terminals; and
transmitting at least one of a broadcast flow and a multicast flow to the access terminals other than the first access terminal, said flow comprising data received from the first access terminal.
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Accused Products
Abstract
A push-to-talk (“PTT”) group call system, for use as, e.g., a public safety wireless network, includes a CDMA-based 1x-EVDO radio access network operably connected to a PTT server over an IP network. The radio access network includes base stations for radio communications with a number of distributed mobile stations. In carrying out wireless communications, the group call system combines IP-based voice and other real-time multimedia services with the 1x-EVDO radio access network'"'"'s Broadcast Multicast Service. This allows a number of users to receive the same copy of an IP-based media stream for point-to-multipoint, group transmissions. To reduce call setup times, the group call system uses “standing” call groups, which are ongoing group communication channels pre-established between the PTT server and authorized group users. Thus, mobile stations link to one or more standing call groups of interest upon power-up, prior to users speaking.
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Citations
20 Claims
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1. A method of communicating with a plurality of wireless access terminals over a wireless network, the method comprising the steps of:
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assigning a floor to a first of said access terminals based on a message received from at least one of said access terminals; and
transmitting at least one of a broadcast flow and a multicast flow to the access terminals other than the first access terminal, said flow comprising data received from the first access terminal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method of communicating over a wireless network comprising the steps of:
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registering with the network for a standing call group comprising a plurality of access terminals each provided with parameters for accessing at least one of a broadcast flow and a multicast flow; and
accessing the at least one of the broadcast flow and multicast flow based on the parameters, wherein the at least one of the broadcast flow and multicast flow comprises data from one of said plurality of access terminals. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A method of communicating with a plurality of wireless access terminals over a wireless network, the method comprising the steps of:
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transmitting parameters to the access terminals for commonly accessing at least one of a broadcast flow and a multicast flow;
granting a floor to the first access terminal based on a message from a first of said access terminals; and
transmitting data received from the first access terminal to the other access terminals over the at least one of the broadcast flow and multicast flow. - View Dependent Claims (19, 20)
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Specification