Determining availability of members of a contact list in a communication device
First Claim
1. A method of determining availability of members of a contact list in a wireless communication system, wherein the method comprises:
- determining an availability status of members of a contact list by receiving messages that indicate changes in availability of client devices associated with the contact list; and
transmitting information regarding the availability of the client devices only when a change has occurred in the availability of a client device.
1 Assignment
0 Petitions
Accused Products
Abstract
A method of determining PTT availability of members of a contact list in a wireless PTT communication system makes efficient use of resources by updating client devices (118, 122, 126) with new PTT contact list status information only when necessary. The availability of client devices (118, 122, 126) associated with contact lists (528, 530, 532) are determined by a PTT controller (112) according to the content of messages from the client devices (118, 122, 126). New information regarding the availability of a client device associated with a contact list (528, 530, 532) is transmitted to relevant client devices (118, 122, 126) only when a change has occurred in the availability of a member. Likewise, a client device (118, 122, 126) notifies the PTT controller 112 of its availability only when a change occurs.
46 Citations
21 Claims
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1. A method of determining availability of members of a contact list in a wireless communication system, wherein the method comprises:
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determining an availability status of members of a contact list by receiving messages that indicate changes in availability of client devices associated with the contact list; and
transmitting information regarding the availability of the client devices only when a change has occurred in the availability of a client device. - View Dependent Claims (2, 3, 4)
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5. A method of indicating availability of a wireless client device that is associated with a contact list in a wireless communication system, wherein the method comprises:
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detecting a change in availability of the client device;
when a change in availability of the client device is detected, transmitting a message from the client device to a controller, wherein the message signals the change in availability to the controller. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12, 13, 14, 21)
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15. A method of updating the availability of members of a contact list in a wireless client device, wherein the method comprises:
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receiving from a controller a wireless message concerning the availability of other client devices, which are associated with the contact list, only when a change has occurred in the availability of at least one of the other client devices; and
storing information from the wireless message concerning the availability of the other client devices in a memory of the device. - View Dependent Claims (16, 17, 18, 19, 20)
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Specification