Method and apparatus for identifying wireless access points using beacon frames

• US 9,467,818 B2
• Filed: 01/04/2012
• Issued: 10/11/2016
• Est. Priority Date: 01/04/2012
• Status: Active Grant

• Current Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Original Assignee: Cisco Technology, Inc. (Cisco Systems, Inc.)
• Inventors: O'Brien, Nolan D., Smith, Rodney
• Primary Examiner(s): Kao, Jutai
• Application Number:
  US13/343,574
• Publication Number:
  US 20130170432A1
• Time in Patent Office: 1,742 Days
• Field of Search: None
• US Class Current: 1/1
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• CPC Class Codes: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 48/10 using broadcasted information
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 8/245 from a network towards a terminal

Abstract

Techniques are described for identifying a wireless access point device using beacon messages and probe responses. An access point may generate and broadcast beacon messages which include an information element containing information specific to the device as well as to the current context of the device. For example, the information element may include a device vendor ID, product ID, and a device-unique ID. That is, the information element provides information related to the device itself independently from the configuration of the wireless network which the beacon message (or probe response) is associated with.

Claims

1. A method, comprising:

exposing, on a wireless access point device, at least a first wireless network hosted by a first virtual access point configured on the wireless access point device and a second wireless network hosted by a second virtual access point configured on the wireless access point device;

generating a first management frame corresponding to the first wireless network and a second management frame corresponding to the second wireless network, wherein the first and second management frames each include an information element storing a plurality of information fields, the information fields storing identification information identifying the wireless access point device independently from both a configuration of the first and second wireless networks and a first and second Media Access Control (MAC) address associated with the first and second virtual access points, respectively, and wherein at least a first one of the information fields identify the wireless access point device hosting the first and second virtual access points; and

broadcasting the first and second management frames to one or more client devices within range of the wireless access point.

2. The method of claim 1, wherein the first and second management frames are beacon messages broadcast to identify the first and second wireless networks exposed, respectively, by the first and second virtual access points to the one or more client devices.

3. The method of claim 1, further comprising:

receiving, on the first virtual access point, a probe request message, wherein the first management frame is generated and broadcast in response to the probe request message.

4. The method of claim 1, wherein the plurality of information fields include an access point vendor field, an access point product field and an access point device ID field.

5. The method of claim 1, wherein the plurality of information fields include an access point version field.

6. The method of claim 1, wherein the plurality of information fields include an access point device context field.

7. The method of claim 6, wherein the access point device context field identifies whether the first wireless network has either a default device configuration state or a user configured state.

8. The method of claim 6, wherein the access point device context field identifies whether the first wireless network is a guest wireless network or a primary wireless network.

9. A non-transitory computer-readable storage medium storing code for execution by a wireless access point, wherein the code, when executed by the wireless access point, performs an operation, comprising:

exposing, on a wireless access point device, at least a first wireless network hosted by a first virtual access point configured on the wireless access point device and a second wireless network hosted by a second virtual access point configured on the wireless access point device;

generating a first management frame corresponding to the first wireless network and a second management frame corresponding to the second wireless network, wherein the first and second management frames each include an information element storing a plurality of information fields, the information fields storing identification information identifying the wireless access point device independently from both a configuration of the first and second wireless networks and a first and second Media Access Control (MAC) address associated with the first and second virtual access points, respectively, and wherein at least a first one of the information fields identify the wireless access point device hosting the first and second virtual access points; and

broadcasting the first and second management frames to one or more client devices within range of the wireless access point.

10. The non-transitory computer-readable storage medium of claim 9, wherein the first and second management frames are beacon messages broadcast to identify the first and second wireless networks exposed, respectively, by the first and second virtual access points to the one or more client devices.

11. The non-transitory computer-readable storage medium of claim 9, wherein the operation further comprises:

receiving, on the first virtual access point, a probe request message, wherein the first management frame is generated and broadcast in response to the probe request message.

12. The non-transitory computer-readable storage medium of claim 9, wherein the plurality of information fields include an access point vendor field, an access point product field and an access point device ID field.

13. The non-transitory computer-readable storage medium of claim 9, wherein the plurality of information fields further include an access point version field.

14. The non-transitory computer-readable storage medium of claim 9, wherein the plurality of information fields include an access point device context field.

15. The computer-readable storage medium of claim 14, wherein the access point device context field identifies whether the first wireless network has either a default device configuration state or a user configured state.

16. The non-transitory computer-readable storage medium of claim 14, wherein the access point device context field identifies whether the first wireless network is a guest wireless network or a primary wireless network.

17. An apparatus, comprising:

a processor; and

a memory storing executable instructions which, when executed on the processor, perform an operation, comprising;

exposing, on a wireless access point device, at least a first wireless network hosted by a first virtual access point configured on the wireless access point device and a second wireless network hosted by a second virtual access point configured on the wireless access point device,

generating a first management frame corresponding to the first wireless and a second management frame corresponding to the second wireless network, wherein the first and second management frames each include an information element storing a plurality of information fields, the information fields storing identification information identifying the wireless access point device independently from both a configuration of the first and second wireless networks and a first and second Media Access Control (MAC) address associated with the first and second virtual access points associated with the first and second virtual access points, respectively, and wherein at least a first one of the information fields identify the wireless access point device hosting the first and second virtual access points, and

broadcasting the first and second management frames to one or more client devices within range of the wireless access point.

18. The apparatus of claim 17, wherein the first and second management frames are beacon messages broadcast to identify the first and second wireless networks exposed, respectively, by the first and second virtual access points to the one or more client devices.

19. The apparatus of claim 17, wherein the operation further comprises:

receiving, on the first virtual access point, a probe request message, wherein the first management frame is generated and broadcast in response to the probe request message.

20. The apparatus of claim 17, wherein the plurality of information fields include an access point vendor field, an access point product field and an access point device ID field.

21. The apparatus of claim 17, wherein the plurality of information fields further include an access point version field.

22. The apparatus of claim 17, wherein the plurality of information fields include an access point device context field.

23. The apparatus of claim 22, wherein the access point device context field identifies whether the first wireless network has either a default device configuration state or a user configured state.

24. The apparatus of claim 22, wherein the access point device context field identifies whether the first wireless network is a guest wireless network or a primary wireless network.

25. The apparatus of claim 22, wherein the context field identifies one or more network services supported by the first wireless network.

26. The apparatus of claim 22, wherein the context field identifies an uplink state for the first wireless network exposed on the wireless access point device.

27. The apparatus of claim 22, wherein the context field identifies at least one of a current load or an available radio bandwidth for the first wireless network exposed on the wireless access point device.