Method and system for handovers using service description data
First Claim
1. A method, in a terminal device, of handing over a wireless communications session from a first access point to a second access point, the method comprising:
- (a) establishing a link with the second access point;
(b) receiving service description data from the second access point;
(c) selecting a group key based on the service description data; and
(b) authenticating the link with the second access point using the selected group key.
1 Assignment
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Accused Products
Abstract
Terminal devices efficiently transition from a first access point to a second access point based on service discovery information that is transmitted by the second access point. In Bluetooth implementations, the present invention advantageously may be implemented without requiring modifications to a terminal device'"'"'s terminal module. Accordingly, in handing over a wireless communications session from a first access point to a second access point, a terminal device establishes a link with the second access point. The terminal device receives service description data, such as an SDP message, from the second access point, selects a group key based on the service, and authenticates the link with the second access point using the selected group key.
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Citations
40 Claims
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1. A method, in a terminal device, of handing over a wireless communications session from a first access point to a second access point, the method comprising:
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(a) establishing a link with the second access point;
(b) receiving service description data from the second access point;
(c) selecting a group key based on the service description data; and
(b) authenticating the link with the second access point using the selected group key. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A terminal device that is capable of handing over a wireless communications session from a first access point to a second access point, the terminal device comprising:
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means for establishing a link with the second access point;
means for receiving service description data from the second access point;
means for selecting a group key based on the service description data; and
means for authenticating the link with the second access point using the selected group key. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, in a current access point, of handing over a wireless communications session with a terminal device from a previous access point, the method comprising:
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(a) establishing a link with the terminal device;
(b) sending service description data to the terminal device; and
(c) authenticating the link with the second access point using a group key based on the service description data. - View Dependent Claims (18, 19, 20, 21, 22)
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23. An access point that is capable of handing over a wireless communications session with a terminal device from a previous access point, the access point comprising:
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means for establishing a link with the terminal device;
means for sending service description data to the terminal device; and
means for authenticating the link with the second access point using a group key based on the service description data. - View Dependent Claims (24, 25, 26, 27, 28)
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29. A method, in a terminal device, of handing over a wireless communications session from a first access point to a second access point, the method comprising:
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(a) entering a first coverage area associated with the first access point;
(b) establishing a first link with the first access point (c) receiving service description data from the first access point;
(d) selecting a first group key based on the service description data from the first access point;
(e) authenticating the first link using the first group key;
(f) establishing a communications session with the first access point;
(g) entering a second coverage area associated with the second access point;
(h) establishing a second link with the second access point;
(i) receiving service description data from the second access point;
(j) selecting a second group key based on the service description data from the second access point;
(k) authenticating the second link using the second group key; and
(l) continuing the communications session with the second access point. - View Dependent Claims (30, 31, 32, 33)
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34. A terminal device that is capable of handing over a wireless communications session from a first access point to a second access point, the terminal device comprising:
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means for entering a first coverage area associated with the first access point;
means for establishing a first link with the first access point means for receiving service description data from the first access point;
means for selecting a first group key based on the service description data from the first access point;
means for authenticating the first link using the first group key;
means for establishing a communications session with the first access point;
means for entering a second coverage area associated with the second access point;
means for establishing a second link with the second access point;
means for receiving service description data from the second access point;
means for selecting a second group key based on the service description data from the second access point;
means for authenticating the second link using the second group key; and
means for continuing the communications session with the second access point. - View Dependent Claims (35, 36, 37, 38)
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39. A computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system of a terminal device to hand over a wireless communications session from a first access point to a second access point, the computer program logic comprising:
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program code for enabling the processor to establish a link with the second access point;
program code for enabling the processor to receive service description data from the second access point;
program code for enabling the processor to select a group key based on the service description data; and
program code for enabling the processor to authenticate the link with the second access point using the selected group key.
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40. A computer program product comprising a computer useable medium having computer program logic recorded thereon for enabling a processor in a computer system of an access point to hand over a wireless communications session with a terminal device from a previous access point, the computer program logic comprising:
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program code for enabling the processor to establish a link with the terminal device;
program code for enabling the processor to send service description data to the terminal device; and
program code for enabling the processor to authenticate the link with the second access point using a group key based on the service description data.
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Specification