Access network query protocol method and apparatus

Patent metadata

Field	Value
Publication number	US-2019239261-A1
Application number	US-201916378065-A
Country	US
Kind code	A1
Filing date	Apr 8, 2019
Priority date	Jan 11, 2012
Publication date	Aug 1, 2019
Grant date	—

Abstract

A method performed by a STA may comprise transmitting a first ANQP message to an AP and receiving a second ANQP message in response. The second ANQP message may comprise a CCC value representing a configuration instance of the AP which is incremented by one upon a configuration change. The CCC value may wrap around once a maximum value is reached. The first ANQP message may comprise the CCC value or may comprise another CCC value which is different than the CCC value.

First claim

What is claimed is:

1 . A method performed by a station (STA), the method comprising:
transmitting, by the STA to an access point (AP), a first access network query protocol (ANQP) message; and receiving, in response to transmitting the first ANQP message, a second ANQP message comprising a configuration change count (CCC) value, wherein the CCC value represents a configuration instance of the AP and the CCC value represents a value which is incremented by one upon a configuration change of the AP and wraps around once a maximum value is reached.

2 . The method of claim 1 , wherein the first ANQP message comprises the CCC value.

3 . The method of claim 1 , wherein the first ANQP comprises another CCC value which is different than the CCC value.

4 . The method of claim 1 , wherein the first ANQP message is transmitted to a plurality of APs.

5 . The method of claim 1 , wherein the second ANQP message comprises configuration information including ANQP attributes.

6 . The method of claim 5 , wherein the ANQP attributes correspond to the CCC value.

7 . The method of claim 6 , further comprising:
storing the ANQP attributes and the CCC value.

8 . The method of claim 7 , further comprising:
receiving a beacon frame comprising another CCC value; determining whether the another CCC value matches the stored CCC value; and transmitting a third ANQP message to the AP in response to the determining; wherein the another CCC value does not match the stored CCC value.

9 . A method performed by a station (STA), the method comprising:
receiving, from an access point (AP), a beacon frame comprising a configuration change count (CCC) value; determining that there is no corresponding CCC value in a memory of the STA; and transmitting a first access network query protocol (ANQP) message, to the AP.

10 . The method of claim 9 , further comprising:
receiving, in response to transmitting the first ANQP message, a second ANQP message comprising the configuration change count (CCC) value and a plurality of ANQP attributes correspond to the CCC value.

11 . The method of claim 10 , further comprising:
storing the ANQP attributes and the CCC value.

12 . The method of claim 10 , further comprising:
receiving another beacon frame comprising another CCC value; determining whether the another CCC value matches the stored CCC value; and not transmitting another ANQP message to the AP in response to the determining; wherein the another CCC value matches the stored CCC value.

13 . The method of claim 9 , wherein the CCC value represents a configuration instance of the AP and the CCC value represents a value which is incremented by one upon a configuration change of the AP and wraps around once a maximum value is reached.

14 . The method of claim 9 , wherein the ANQP message is transmitted to a plurality of APs.

15 . A station (STA) comprising:
a transmitter configured to transmit, to an access point (AP), a first access network query protocol (ANQP) message; and a receiver configured to receive, in response to transmission of the first ANQP message, a second ANQP message comprising a configuration change count (CCC) value, wherein the CCC value represents a configuration instance of the AP and the CCC value represents a value which is incremented by one upon a configuration change of the AP and wraps around once a maximum value is reached.

16 . The STA of claim 15 , wherein the first ANQP message comprises the CCC value.

17 . The STA of claim 15 , wherein the second ANQP message comprises configuration information including ANQP attributes.

18 . The STA of claim 17 , wherein the ANQP attributes correspond to the CCC value.

19 . The STA of claim 18 , further comprising:
memory configured to store the ANQP attributes and the CCC value.

20 . The STA of claim 19 , further comprising:
the receiver configured to receive a beacon frame comprising another CCC value; circuitry configured to determine whether the another CCC value matches the stored CCC value; and the transmitter configured to, on a condition the another CCC value does not match the stored CCC value, transmit a third ANQP message to the AP in response to the determining.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Wang Lei
• Targali Yousif
• Grandhi Sudheer A
• Wang Xiaofei
• Zhang Guodong

Classifications

• H04W76/11 Primary

  Allocation or use of connection identifiers · CPC title

• H04L9/0844

  with user authentication or key authentication, e.g. ElGamal, MTI, MQV-Menezes-Qu-Vanstone protocol or Diffie-Hellman protocols using implicitly-certified keys · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04W76/10 Primary

  Connection setup · CPC title

• H04L12/06

  Answer-back mechanisms or circuits · CPC title