Method and system for handover between wireless local area network and wireless wide area network
First Claim
1. A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising:
- communicating via the WWAN interface;
detecting whether its WLAN interface is available;
entering into a WWAN-to-WLAN state from a WWAN active state if its WLAN interface is available;
providing its presence information to a public server with known address in said WWAN-to-WLAN state.
5 Assignments
0 Petitions
Accused Products
Abstract
A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising steps of: communicating via the WWAN interface; inspecting whether its WLAN interface is available; entering into a WWAN-to WLAN state from a WWAN active state if its WLAN interface is available; said user terminal provides a public server with known network address with its presence information said WWAN-to-WLAN state; and acquiring the network address of another user terminal communicating with said user terminal from said server, sending a WLAN call request to said another user terminal by using said address; entering into WLAN active state after receiving the message for accepting the WLAN call request from said another user terminal.
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Citations
40 Claims
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1. A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising:
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communicating via the WWAN interface;
detecting whether its WLAN interface is available;
entering into a WWAN-to-WLAN state from a WWAN active state if its WLAN interface is available;
providing its presence information to a public server with known address in said WWAN-to-WLAN state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising:
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communicating via the WWAN interface;
receiving a WLAN call request from another user terminal communicating with said user terminal;
sending a response for accepting the WLAN call request to said another user terminal if the profile information indicates that said user terminal can switch radio interfaces during communication course, according to the profile information of said user terminal;
entering into the WLAN active state. - View Dependent Claims (13)
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14. A method with telephony function to be performed by a user terminal, for accessing Internet and supporting online communication services, comprising:
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receiving a WLAN call request from another user terminal with WLAN and WWAN interfaces communicating with said user terminal;
sending a response for accepting the WLAN call request to said another user terminal if the profile information indicates that said user terminal can switch to communicate via Internet during communication procedure, according to the profile information in said user terminal;
entering into the state of communicating-via-Internet. - View Dependent Claims (15)
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16. A method to be performed by a public server with known network address in Internet, comprising:
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setting the communication peer roster list for each user managed by said server;
recording the presence information of the user terminal used by the user according to the information delivered by the user when the user enters into the service area of WLAN connected via Internet;
recording the absence information of the user when the user leaves the WLAN service area. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A method to be performed by a user terminal with WWAN interface and WLAN interfaces, comprising:
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communicating via the WLAN interface;
inspecting whether the WLAN interface of said user terminal is available;
entering into a WLAN-to-WWAN state from a WWAN active state if said WLAN interface is not available;
sending a WWAN call request to another user terminal communicating with said user terminal in the WLAN-to-WWAN state. - View Dependent Claims (25, 26, 27, 28)
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29. A method with telephony function to be performed by a user terminal, for accessing Internet and supporting online communication services, comprising:
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communicating via the WLAN interface;
receiving a WWAN call request from another user terminal with WWAN and WLAN interfaces;
sending a message for accepting said WWAN call request to said another user terminal;
entering into the state of communicating with the WWAN interface.
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30. A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising:
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communicating via the WLAN interface;
inspecting whether the WLAN interface of said user terminal is available;
entering into WWAN state from WLAN active state if the WLAN interface is not available;
sending a handover request to another user terminal communicating with said user terminal in WLAN-to-WWAN state. - View Dependent Claims (31, 32, 33)
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34. A method to be performed by a user terminal with WWAN and WLAN interfaces, comprising:
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communicating via the WLAN interface;
receiving a handover request sent from another user terminal communicating with said user terminal so as to enter into WLAN-to-WWAN state from the state of communicating with the WLAN interface;
sending a WWAN call request to said another user terminal;
receiving the message for accepting the WWAN call request from said another user terminal;
entering into WWAN active state from WLAN-to-WWAN state.
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35. A user terminal with WWAN and WLAN interfaces, comprising:
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a communicating unit, for communicating via the WWAN interface;
an inspecting unit, for inspecting whether the user terminal'"'"'s WLAN interface is available;
a handover unit, for handover to a WWAN-to-WLAN state from a WWAN active state when inspecting that said WLAN interface is available;
a sending unit, for providing a public server with known network address with the presence information of said user terminal. - View Dependent Claims (36, 37, 38, 40)
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39. A user terminal with WWAN and WLAN interfaces, comprising:
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a communicating unit, for communicating via the WWAN interface;
a receiving unit, for receiving a WLAN call request from another user terminal communicating with said user terminal;
a sending unit, for sending a response for accepting said WLAN call request to said another user terminal if the profile information indicates that said user terminal can switch radio interfaces during communication course, according to the profile information of said user terminal;
a handover unit, for handover to a WLAN active state.
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Specification