Wireless discovery using a reduced traffic load process

Patent metadata

Field	Value
Publication number	US-9204335-B2
Application number	US-201213719480-A
Country	US
Kind code	B2
Filing date	Dec 19, 2012
Priority date	May 2, 2012
Publication date	Dec 1, 2015
Grant date	Dec 1, 2015

Abstract

Traffic load over a wireless medium due to wireless access point discovery is reduced. The wireless stations and wireless access points support wireless discovery using a reduced traffic load process. The reduced traffic load process includes providing aggregated short probe responses.

First claim

What is claimed is:

1. A wireless station, comprising:
a transceiver to transmit and receive wireless signals via a wireless medium; and
a processor arranged to set parameters associated with a probability function, and to randomly identify a scanning type selected from active scanning or passive scanning based on the parameters associated with the probability function set by the processor, to cause the transceiver to scan based on the scanning type randomly identified.

2. The wireless station of claim 1 , wherein the probability function is fixed.

3. The wireless station of claim 1 , wherein the processor, upon detection of a predetermined condition, overrides the probability function to provide discretion to the processor to select the scanning type.

4. The wireless station of claim 3 , wherein the predetermined condition comprises wireless access discovery for emergency services.

5. The wireless station of claim 1 , wherein the parameters of the probability function are dependent on network events.

6. The wireless station of claim 5 , wherein the network events comprise one selected from a group consisting of a probe request, a probe response, a beacon, a measurement pilot, and a short beacon.

7. The wireless station of claim 1 , wherein the probability function includes a bias to increase a probability of selecting one of passive scanning or active scanning.

8. The wireless station of claim 1 , wherein the processor is arranged to switch channels when a short response is not received before a minimum response time lapses.

9. The wireless station of claim 1 , wherein the processor is arranged to act on a reference provided in a received short probe response.

10. A system, comprising:
a memory arranged to store data thereon; and
a processor, coupled to the memory, the processor arranged to access the memory and to set parameters associated with a probability function, to randomly identify a scanning type selected from active scanning or passive scanning based on the parameters associated with the probability function set b the processor, and to scan based on the scanning type randomly identified.

11. The system of claim 10 , wherein the probability function is fixed.

12. The system of claim 10 , wherein the processor, upon detection of a predetermined condition, is arranged to override the probability function to provide discretion to the processor to select the scanning type.

13. The system of claim 10 , wherein the probability function includes a bias to increase a probability of selecting one of passive scanning or active scanning.

14. The system of claim 10 , wherein the processor is arranged to switch channels when a short response is not received before a minimum response time lapses.

15. The system of claim 10 , wherein the processor is arranged to act on a reference provided in a received short probe response.

16. A method for reducing traffic load over a wireless medium due to wireless access point discovery, comprising:
setting parameters associated with a probability function;
randomly identifying a scanning type selected from active scanning or passive scanning based on the set parameters associated with the probability function; and
scanning based on the scanning type randomly identified.

17. The method of claim 16 , further comprising configuring at least one wireless station and at least one wireless access point to support wireless discovery using a reduced traffic load process, generating a short probe response at one of a plurality of wireless access points in response to receipt of a probe request from the at least one wireless station, wherein the short probe response provides only requisite information to the at least one wireless station for performing link setup to reduce the traffic load on the wireless medium, and transmitting the short probe response to the at least one wireless station.

18. The method of claim 17 , wherein the generating the short probe response comprises generating the short probe response with only partial information of capabilities and attributes of one of the plurality of wireless access points, scheduling information of full wireless access point capabilities and an indication of correct decoding of the probe request.

19. The method of claim 17 , wherein the configuring at least one of the at least one wireless station and the at least one wireless access point to support wireless discovery using the reduced traffic load process comprises setting parameters associated with a probability function at the at least one wireless station, randomly identifying a scanning type based on the set parameters associated with the probability function, and performing scanning based on the randomly identified scanning type.

Assignees

• Segev Jonathan
• Stephens Adrian P
• Qi Emily H
• Gong Xiaohong X
• Park Minyoung
• Intel Corp

Inventors

• Segev Jonathan
• Stephens Adrian P
• Qi Emily H
• Gong Xiaohong X
• Park Minyoung

Classifications

• H04W48/20

  Selecting an access point · CPC title

• H04W28/06 Primary

  Optimizing {the usage of the radio link}, e.g. header compression, information sizing {, discarding information (system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365)} · CPC title

• H04W48/16 Primary

  Discovering, processing access restriction or access information · CPC title