Wireless roaming using a distributed store

Patent metadata

Field	Value
Publication number	US-10779339-B2
Application number	US-201815945430-A
Country	US
Kind code	B2
Filing date	Apr 4, 2018
Priority date	Jan 7, 2015
Publication date	Sep 15, 2020
Grant date	Sep 15, 2020

Abstract

Systems, methods, and computer-readable storage media for wireless roaming are disclosed. An access point receives a communication request from a wireless device and determines a home broadcast domain associated with the wireless device. The access point determines that the home broadcast domain is different than the broadcast domain associated with the access point and proceeds to identify a second access point that is associated with the home broadcast domain of the wireless device. The access point establishes a tunnel between the access point and the second access point for routing traffic associated with the wireless device.

First claim

We claim:

1. A method comprising:
identifying a home broadcast domain of a wireless device in response to a communication request from the wireless device received via a first access point of a plurality of access points;
determining whether the wireless device is roaming based on a determination that a broadcast domain associated with the first access point is different than the home broadcast domain associated with the wireless device from a distributed store;
identifying a second access point of the plurality of access points associated with the home broadcast domain of the wireless device; and
establishing, based on the determination that the wireless device is roaming, a tunnel between the first access point and the second access point.

2. The method of claim 1 , further comprising:
routing, via the first access point, traffic associated with the wireless device through the tunnel and to the second access point.

3. The method of claim 1 , wherein the distributed store comprises a distributed hash table based on at least a portion of the plurality of access points, and wherein broadcast domain information is stored at a subset of the plurality of access points.

4. The method of claim 1 , further comprising:
flooding an update to the plurality of access points indicating an association between (a) the wireless device and (b) the home broadcast domain of the wireless device and/or the broadcast domain associated with the first access point.

5. The method of claim 1 , wherein the broadcast domain associated with the first access point comprises a native Virtual Local Area Network (VLAN) associated with the first access point.

6. The method of claim 5 , further comprising:
sending, via the first access point, at least one broadcast message to other access points on the broadcast domain, the at least one broadcast message having an identification of the broadcast domain.

7. The method of claim 1 , further comprising:
identifying a failure associated with the tunnel;
sending a request to third access point on the home broadcast domain of the wireless device;
receiving a reply from the third access point on the home broadcast domain of the wireless device; and
establishing a second tunnel between the third access point and the first access point.

8. A system on a wireless network, the system comprising:
a processor; and
a non-transitory computer-readable storage medium having stored therein instructions which, when executed by the processor, cause the processor to perform operations comprising:
identifying a home broadcast domain of a wireless device in response to a communication request from the wireless device received via a first access point of a plurality of access points;
determining whether the wireless device is roaming based on a determination that a broadcast domain associated with the first access point is different than the home broadcast domain associated with the wireless device from a distributed store;
identifying a second access point of the plurality of access points associated with the home broadcast domain of the wireless device; and
establishing, based on the determination that the wireless device is roaming, a tunnel between the first access point and the second access point.

9. The system of claim 8 , wherein the operations include routing traffic associated with the wireless device through the tunnel and to the second access point.

10. The system of claim 8 , wherein the tunnel comprises one of a layer 2 protocol tunnel or a virtual private network tunnel.

11. The system of claim 8 , wherein a network identification (ID) and/or a network tag associated with the wireless device are retrieved from the distributed store.

12. The system of claim 8 , wherein the distributed store comprises a distributed hash table stored at the plurality of access points on the wireless network.

13. The system of claim 8 , wherein the operations include:
identifying a failure associated with the tunnel;
sending a request to third access point on the home broadcast domain of the wireless device;
receiving a reply from the third access point on the home broadcast domain of the wireless device; and
establishing a second tunnel between the third access point and the first access point.

14. The system of claim 13 , wherein the operations include routing, via the first access point, traffic associated with the wireless device through the second tunnel and to the third access point.

15. A non-transitory computer-readable storage medium having stored therein instructions which, when executed by a processor, cause the processor to perform operations comprising:
identifying a home broadcast domain of a wireless device in response to a communication request from the wireless device received via a first access point of a plurality of access points;
determining whether the wireless device is roaming based on a determination that a broadcast domain associated with the first access point is different than the home broadcast domain associated with the wireless device from a distributed store;
identifying a second access point of the plurality of access points associated with the home broadcast domain of the wireless device; and
establishing, based on the determination that the wireless device is roaming, a tunnel between the first access point and the second access point.

16. The non-transitory computer-readable storage medium of claim 15 , wherein the operations include routing traffic associated with the wireless device through the tunnel and to the second access point.

17. The non-transitory computer-readable storage medium of claim 15 , wherein the tunnel comprises one of a layer 2 protocol tunnel or a virtual private network tunnel.

18. The non-transitory computer-readable storage medium of claim 17 , wherein a network identification (ID) and/or a network tag associated with the wireless device are retrieved from the distributed store.

19. The non-transitory computer-readable storage medium of claim 15 , wherein the distributed store comprises a distributed hash table stored at the plurality of access points on a wireless network of the first access point.

20. The non-transitory computer-readable storage medium of claim 15 , wherein the operations include:
identifying a failure associated with the tunnel;
sending a request to third access point on the home broadcast domain of the wireless device;
receiving a reply from the third access point on the home broadcast domain of the wireless device; and
establishing a second tunnel between the third access point and the first access point.

Assignees

• Cisco Tech Inc

Inventors

• Verkaik Patrick Douglas
• Zernik Asa Daniel
• Patel Jignesh Devji
• Milosavljevic Nebojsa
• Frey Clifford A

Classifications

• H04W4/06 Primary

  Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services · CPC title

• H04W8/04

  Registration at HLR or HSS [Home Subscriber Server] · CPC title

• H04W76/12 Primary

  Setup of transport tunnels · CPC title

• H04W8/082

  for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents · CPC title

• H04L12/189

  in combination with wireless systems (selective distribution or broadcast in wireless communication networks H04W4/06) · CPC title