Presence management in packet-switched networks using circuit-switched USSD signaling
First Claim
1. A method of managing presence information in a packet-switched wireless communication network, said method comprising:
- sending a circuit-switched presence update message from a mobile unit to a presence server in the packet-switched network; and
updating the presence information for the mobile unit in the presence server.
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Accused Products
Abstract
A method of managing presence information in a packet-switched wireless communication network such as a General Packet Radio Service (GPRS) network or a Wideband Code Division Multiple Access (WCDMA) network. Instead of using the Session Initiation Protocol (SIP) to send presence update messages to a presence server in the packet-switched network, the MS/UE sends its presence information to the presence server using a circuit-switched Unstructured Supplementary Services Data (USSD) message that is sent via a USSD gateway. The USSD message includes an IP address of the presence server, and the USSD gateway extracts the IP address and forwards the presence update message to the presence server.
52 Citations
18 Claims
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1. A method of managing presence information in a packet-switched wireless communication network, said method comprising:
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sending a circuit-switched presence update message from a mobile unit to a presence server in the packet-switched network; and
updating the presence information for the mobile unit in the presence server. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method of managing presence information in a packet-switched wireless communication network, said method comprising:
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sending a packet-switched presence message from a mobile unit to a presence server in the packet-switched network during initial registration of the mobile unit with the packet-switched wireless communication network, said packet-switched presence message including presence information for the mobile unit, an identification number for the mobile unit, and an indication that the mobile unit supports circuit-switched presence reporting;
sending a packet-switched acknowledgment message from the presence server to the mobile unit in response to the packet-switched presence message, said packet-switched acknowledgment message including an Internet Protocol (IP) address of the presence server and an indication that the presence server supports circuit-switched presence management;
thereafter, determining by the mobile unit that a change in the presence status of the mobile unit has occurred;
sending a circuit-switched presence update message from the mobile unit to the presence server; and
updating the presence information for the mobile unit in the presence server. - View Dependent Claims (8, 9, 10, 11)
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12. An Unstructured Supplementary Services Data (USSD) gateway comprising:
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means for receiving a circuit-switched USSD presence update message from a mobile unit, said USSD presence update message including an Internet Protocol (IP) address of a presence server in a packet-switched wireless communications network;
means for extracting the IP address of the presence server from the USSD message; and
means for forwarding the presence update message to the presence server utilizing the extracted IP address of the presence server.
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13. A method of reporting presence information for a mobile station attached for packet-switched operation in a General Packet Radio Service (GPRS) wireless communication network, wherein the mobile station has entered a STANDBY state, said method comprising:
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receiving by the mobile station, a page for a circuit-switched call;
suspending packet-switched GPRS operation by the mobile station; and
sending a circuit-switched presence update message from the mobile station to a presence server in the GPRS network, said circuit-switched presence update message including an indication that the mobile station is unavailable. - View Dependent Claims (14, 15, 16, 17, 18)
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Specification