AP-local dynamic switching

• US 9,258,702 B2
• Filed: 06/11/2007
• Issued: 02/09/2016
• Est. Priority Date: 06/09/2006
• Status: Active Grant

• Current Assignee: Juniper Networks Incorporated
• Original Assignee: Trapeze Networks Incorporated (Juniper Networks Incorporated)
• Inventors: Murphy, James, Morain, Gary Eugene, Chesnutt, Stan
• Primary Examiner(s): Khajuria, Shripal
• Assistant Examiner(s): Sciacca, Scott M
• Application Number:
  US12/304,100
• Publication Number:
  US 20100329177A1
• Time in Patent Office: 3,165 Days
• Field of Search: 370/328, 370/351, 709/238, 709/244
• US Class Current: 1/1
• CPC Class Codes: H04W 12/06 Authentication
• CPC Class Codes: H04W 40/02 Communication route or path selection, e.g. power-based or shortest path routing
• CPC Class Codes: H04W 76/12 Setup of transport tunnels
• CPC Class Codes: H04W 8/082 for traffic bypassing of mobility servers, e.g. location registers, home PLMNs or home agents
• CPC Class Codes: H04W 80/02 Data link layer protocols
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 84/22 with access to wired networks
• CPC Class Codes: H04W 88/14 Backbone network devices

Abstract

A technique for implementing AP-local dynamic switching involves Layer 2 switching. This may be accomplished by providing data associated with wireless stations to an AP sufficient to enable the AP to determine whether traffic from a particular wireless station should be locally switched. Alternatively, the wireless station may be able to determine whether to locally switch traffic based upon the traffic itself. For example, it may be desirable to AP-locally switch voice traffic to avoid latency, which is particularly detrimental to voice transmissions such as voice-over-IP. Traffic that is not to be switched locally is Layer 2 tunneled upstream.

Claims

1. An apparatus, comprising:

a processor coupled to a memory and that is configured to execute a dynamic switching module; and

the dynamic switching module implemented in a non-transitory computer readable medium, and configured to be coupled to a radio and a station switching record (SSR) database storing an SSR associated with a first wireless station that is operatively coupled to an access point (AP) that defines a first virtual access point and a second virtual access point;

the dynamic switching module configured to send a signal such that (1) when the first wireless station is operatively coupled to the first virtual access point, traffic received by the radio from the first wireless station is Layer 2 (L2) switched locally via the first virtual access point to a second wireless station connected to the AP, and (2) when on the first wireless station is operatively coupled to the second virtual access point, the traffic received by the radio from the first wireless station is L2 tunneled upstream via the second virtual access point to the second wireless station,

the traffic including a priority characteristic of the first wireless station, the priority characteristic being associated with a sender of the traffic.

2. The apparatus of claim 1, wherein, in operation, the SSR is received over the radio from an upstream source.

3. The apparatus of claim 1, wherein, the SSR includes data selected from at least one of a station media access control (MAC), service set identification (SSID), virtual local area network (VLAN) name, authentication, authorization and accounting (AAA) data, and user data.

4. The apparatus of claim 1, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 switched locally over the radio to a downstream destination.

5. The apparatus of claim 1, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 switched locally over the radio to an upstream destination.

6. The apparatus of claim 1, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 tunneled upstream over the radio for switching at an upstream switch.

7. The apparatus of claim 1, wherein the dynamic switching module is configured to be coupled to an Ethernet interface.

8. The apparatus of claim 7, wherein, in operation, the SSR is received over the Ethernet interface from an upstream source.

9. The apparatus of claim 7, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 switched locally or L2 tunneled upstream in accordance with the signal over the Ethernet interface.

10. The apparatus of claim 7, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 switched locally over the Ethernet interface to an upstream destination.

11. The apparatus of claim 7, wherein the dynamic switching module is configured to send the signal such that the traffic is L2 switched locally over the Ethernet interface for switching at an upstream switch.

12. The apparatus of claim 1, wherein the first virtual access point and the second virtual access point are each associated with a respective service set identification (SSID), an SSID of the first virtual access point is different from an SSID of the second virtual access point.

13. An apparatus, comprising:

a processor coupled to a memory and that is configured to execute a dynamic switching engine; and

the dynamic switching engine configured to be coupled to a wireless switch and an access point (AP) that define a first virtual access point and a second virtual access point and is connected to a first wireless station; and

the dynamic switching engine implemented in at least one of a processor or a memory, the dynamic switching engine configured to determine whether to (1) Layer 2 switch traffic locally at the AP via the first virtual access point to a second wireless station connected to the AP based upon the first wireless station being operatively coupled to the first virtual access point or (2) Layer 2 tunnel the traffic upstream via the second virtual access point toward the wireless switch for upstream switching to the second wireless station connected to the AP based upon the first wireless station being operatively coupled to the second virtual access point,

the traffic including a priority characteristic of the first wireless station, the priority characteristic being associated with a sender of the traffic.

14. The apparatus of claim 13, wherein the priority characteristic is based on a characteristic of a target of the traffic.

15. The apparatus of claim 13, wherein the dynamic switching engine is configured to Layer 2 switch traffic locally at the AP if the traffic includes voice data.

16. The apparatus of claim 13, wherein the first virtual access point and the second virtual access point are each associated with a respective service set identification (SSID), an SSID of the first virtual access point is different from an SSID of the second virtual access point.

17. A method, comprising:

defining, at an access point (AP) that is operatively coupled to a first wireless station and a second wireless station, a first virtual access point and a second virtual access point;

based on the first wireless station being operatively coupled to the second virtual access point, Layer 2 tunneling traffic from the first wireless station upstream via the second virtual access point to a the second wireless station; and

based on the first wireless station being operatively coupled to the first virtual access point, Layer 2 switching the traffic from the first wireless station AP-locally via the first virtual access point to the second wireless station,

the traffic including a priority characteristic of the first wireless station, the priority characteristic being associated with a sender of the traffic.

18. The method of claim 17, further comprising:

receiving data indicating the priority characteristic of the first wireless station; and

determining whether to AP-locally switch the traffic using the data associated with the first wireless station based upon the priority characteristic.

19. The method of claim 17, wherein the priority characteristic of the first wireless station is based on a characteristic of a target of the traffic.

20. The method of claim 17, wherein the first virtual access point and the second virtual access point are each associated with a respective service set identification (SSID), an SSID of the first virtual access point is different from an SSID of the second virtual access point.