Controlling and enhancing handoff between wireless access points

• US 20080212535A1
• Filed: 05/06/2008
• Published: 09/04/2008
• Est. Priority Date: 09/12/2002
• Status: Active Grant

• Current Assignee: Avago Technologies International Sales Pte Limited (Broadcom, Inc.)
• Original Assignee: Broadcom Corporation (Broadcom, Inc.)
• Inventors: Seshadri, Nambi, Karaoguz, Jeyhan
• Granted Patent: US 8,019,342 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04L 12/1403 Architecture for metering, charging or billing
• CPC Class Codes: H04L 12/1457 using an account
• CPC Class Codes: H04L 63/08 for authentication of entities cryptographic mechanisms or cryptographic arrangements for entity authentication H04L9/32
• CPC Class Codes: H04L 63/083 using passwords cryptographic mechanisms or cryptographic arrangements for entity authentication using a predetermined code H04L9/3226
• CPC Class Codes: H04L 63/105 Multiple levels of security
• CPC Class Codes: H04M 15/8038 Roaming or handoff
• CPC Class Codes: H04W 12/08 Access security
• CPC Class Codes: H04W 12/50 Secure pairing of devices
• CPC Class Codes: H04W 12/72 Subscriber identity
• CPC Class Codes: H04W 36/0038 of security context information
• CPC Class Codes: H04W 4/24 Accounting or billing
• CPC Class Codes: H04W 8/20 Transfer of user or subscriber data
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A process of maintaining access information between wireless hotspots is disclosed. A logon request from a wireless portable device is received by a first access point of a first wireless hotspot and use of the first access point by the wireless portable device is authenticated to establish an access session. Then, information related to the access session is passed to a shared register accessible by a plurality of wireless hotspots and the access session is monitored to determine whether a disconnect by the wireless portable device occurs. Additionally, when the wireless portable device moves from a coverage area of the first wireless hotspot to one coverage area of one of the plurality of wireless hotspots, the information related to the access session may be used to facilitate access to the one of the plurality of wireless hotspots by the wireless portable device.

Claims

1. A wireless portable device comprising:

a transmitter configured to transmit a logon request to a first access point of a first wireless hotspot,

wherein the wireless portable device is authenticated in order to establish an access session with the first access point,

wherein information related to the access session is passed to a shared register accessible by a plurality of wireless access providers, and

wherein when the wireless portable device moves from a coverage area of the first wireless hotspot to a coverage area of one of the plurality of wireless access providers, the information related to the access session may be used to facilitate access to the one of the plurality of wireless access providers by the wireless portable device.

2. The wireless portable device of claim 1, wherein information related to the access session is purged from the shared register after a predetermined time after the disconnect by the wireless portable device is detected.

3. The wireless portable device of claim 1, wherein in order to be authenticated, the wireless portable device is configured to transmit a public key and an identifier to the first access point, and wherein the wireless portable device is configured to transmit login and password data to establish the access session with the first wireless hotspot.

4. The wireless portable device of claim 3, wherein the public key and a wireless telephone number of the wireless portable device are authenticated by requesting billing authorization for the wireless telephone number from a wireless telephone service provider.

5. A method comprising:

transmitting a logon request from a wireless portable device to a first access point of a first wireless hotspot,

wherein the wireless portable device is authenticated in order to establish an access session with the first access point,

wherein information related to the access session is passed to a shared register accessible by a plurality of wireless access providers, and

wherein, when the wireless portable device moves from a coverage area of the first wireless hotspot to a coverage area of one of the plurality of wireless access providers, the information related to the access session may be used to facilitate access to the one of the plurality of wireless access providers by the wireless portable device.

6. The method of claim 5, further comprising purging information related to the access session from the shared register after a predetermined time after the disconnect by the wireless portable device is detected.

7. The method of claim 5, further comprising:

transmitting a public key and an identifier to the first access point for authentication; and

transmitting login and password data to establish the access session with the first wireless hotspot.

8. The method of claim 7, wherein the public key and a wireless telephone number of the wireless portable device are authenticated by requesting billing authorization for the wireless telephone number from a wireless telephone service provider.

9. A wireless portable device comprising:

a transmitter configured to transmit a logon request to a first access point of a first wireless hotspot,

wherein the wireless portable device is authenticated in order to establish an access session with the first access point,

wherein information related to the access session is passed to a local register of the first access point, and

wherein, when the wireless portable device leaves a coverage area of the first wireless hotspot and then re-associates with the first access point, the access session is re-initiated.

10. The wireless portable device of claim 9, wherein the wireless portable device is configured to transmit authorization data, based on a level of authorization between the plurality of wireless access providers, in order to re-initiate the access session.

11. The wireless portable device of claim 9, wherein the re-initiation of the access session does not require a new authentication of the wireless portable device.

12. A method comprising:

transmitting a logon request from a wireless portable device to a first access point of a first wireless hotspot,

wherein the wireless portable device is authenticated in order to establish an access session with the first access point, and

wherein information related to the access session is passed to a local register of the first access point;

re-initiating the access session when the wireless portable device leaves a coverage area of the first wireless hotspot and then re-associates with the first access point.

13. The method of claim 12, further comprising transmitting authorization data from the wireless portable device, based on a level of authorization between the plurality of wireless access providers, in order to re-initiate the access session.

14. The method of claim 13, wherein the re-initiating of the access session does not require a new authentication of the wireless portable device.