1. Avoiding duplicated queries in 11aq
April 2013
doc.: IEEE /0796
Jan 2014
Avoiding duplicated queries in 11aq
Date:
Authors:
Ping FANG, Huawei
Ping FANG, Ping FANG, Huawei

2. April 2013
doc.: IEEE /0426
Jan 2014
Abstract
If existing GAS frames are used, when an 11aq-STA wants to find a service, it will send query to APs around it one by one in unicast. Then for APs belong to the same ESS, this will cause duplicated queries to the same service server. And the duplicated queries will be wasted.
This contribution discussed this issue and possible optimized options.
Ping FANG, Huawei
RYU Cheol. ETRI

3. AP overlap cases Jan 2014 Server/Proxy Query Query AP1 Response
STA
Ping FANG, Huawei

4. AP1 and AP2 connect to same Server
Jan 2014
Duplicated Queries
AP1 and AP2 connect to same Server
STA
AP1
AP2
Server/ Proxy
Query (using unicast GAS Request)
Service Query
Service Query response
Response (using unicast GAS Response)
Duplicated query for the same service
Query (using unicast GAS Request)
Service Query
Service Query response
Response (using unicast GAS Response)
Ping FANG, Huawei

5. Possible Solutions to Avoid Duplicated Queries
Jan 2014
Possible Solutions to Avoid Duplicated Queries
Option 1: allowing 11aq-STAs to broadcast GAS frames
Need to study if there is any impact on legacy STAs’ behavior
Duplicated response could still be there
Option 2: 11aq APs indicates if they are connected to the same server/proxy
Ping FANG, Huawei

6. Jan 2014
Straw Poll 1
Do you support that TGaq develop a mechanism to enable a STA to avoid duplicated queries when multiple APs in the same area are connected to the same server/proxy?
Yes:
No:
Need more information:
Ping FANG, Huawei

7. Jan 2014
Straw Poll 2
Do you support allowing broadcasted GAS frames (GAS Request and GAS Response frames) in 11aq?
Yes:
No:
Need more information:
Ping FANG, Huawei

8. Jan 2014
Straw Poll 3
Do you support that 11aq APs indicates if they are connected to the same server/proxy?
Yes:
No:
Need more information:
Ping FANG, Huawei