1. AP Connection Period in TDLS
March 2010
doc.: IEEE /0247r0
March 2010
AP Connection Period in TDLS
Date:
Authors:
Sudheer Grandhi, InterDigital Communications, LLC
Sudheer Grandhi, InterDigital Communications, LLC

2. March 2010
doc.: IEEE /0247r0
March 2010
Abstract
This presentation contains the details of the proposed change for the comment submitted by Sudheer Grandhi in the first IEEE P802.11z 15 day recirculation Sponsor Ballot.
Sudheer Grandhi, InterDigital Communications, LLC
Sudheer Grandhi, InterDigital Communications, LLC

3. Need for AP Connection in TDLS
March 2010
Need for AP Connection in TDLS
Applications that need Internet access
Internet Gaming
Digital Rights Management
Relevant Information download
Context/Content based Advertisements
Future Applications ?
To support the above Applications TDLS needs
AP connection times/periods for internet access
Especially during “Off Channel” operation
Sudheer Grandhi, InterDigital Communications, LLC

4. AP Connection Period Function
March 2010
AP Connection Period Function
AP Connection period “Capability”
AP Connection period “Setup” (and “Cancellation”)
AP Connection Period “Activity”
Sudheer Grandhi, InterDigital Communications, LLC

5. AP Connection Period Capability
March 2010
AP Connection Period Capability
Capability information exchange
Via TDLS Setup Request/Response messages
Include capability indication in the extended capabilities
A TDLS STA may try to setup an AP Connection period schedule with a peer TDLS STA only if such a capability is indicated as supported
Sudheer Grandhi, InterDigital Communications, LLC

6. AP Connection Period Setup : Procedure
March 2010
AP Connection Period Setup : Procedure
AP Connection periods can be setup by
TDLS peers exchanging relevant information
TDLS Request/Response message exchange
Relevant information can include
AP connection times or periodicity
AP connection durations
Start Time and End Time
Cancellation
Sudheer Grandhi, InterDigital Communications, LLC

7. AP Connection Period Setup : Options
March 2010
AP Connection Period Setup : Options
Option1: Modify existing TDLS messages for eg.
TDLS Setup
TDLS Peer PSM
TDLS Channel Switch
Option2: New TDLS messages
TDLS AP connection period Request message
TDLS AP connection period Response message
Sudheer Grandhi, InterDigital Communications, LLC

8. AP Connection Period Setup : Option2 (Preferred)
March 2010
AP Connection Period Setup : Option2 (Preferred)
TDLS AP connection Period Request message
Sent either through AP or directly to TDLS peer
Includes information such as: AP connection periodicity, Duration, Time reference, End Time, Cancellation
TDLS AP connection Period Response message
Includes information: Accept/Reject, Status code.
Sudheer Grandhi, InterDigital Communications, LLC

9. AP Connection Period Activity
March 2010
AP Connection Period Activity
If TDLS STA on “Base Channel”
Connect/communicate with AP
If TDLS STA on “Off Channel”
Switch to “Base Channel”
Switch back to “Off Channel”
Communicating with AP during TDLS
TDLS STA establishes and determines how data is sent and received during AP Connection periods based on AP capabilities
Any available MAC mechanisms may be used when AP supports them eg. PS-poll, Reverse Direction etc.
Sudheer Grandhi, InterDigital Communications, LLC

10. Proposed Change (1/3) Add the following section: March 2010
AP Connection Period in TDLS A TDLS STA shall be able to establish AP connection periods during TDLS operation to access the distribution system or the Internet to support applications such as Internet gaming, digital rights management and context aware information or advertisements download. A TDLS STA shall be able to setup such AP connection periods by negotiating with peer TDLS STAs.
A TDLS STA shall determine how data is sent and received during AP Connection periods based on the capabilities supported by the AP. Any available MAC mechanisms when supported by the AP may be used during AP connection periods eg. PS-poll, Reverse Direction Grant etc.. A TDLS STA if on an off channel shall switch to the base channel to communicate with the AP during its AP connection period and return to the off channel before the AP connection period expires.
Sudheer Grandhi, InterDigital Communications, LLC

11. March 2010
Proposed Change (2/3)
Insert the following two lines in Table 7-57 in Section :
12 TDLS AP Connection Period Request
13 TDLS AP Connection Period Response
Change Reserved Action field values to “14-255” in Table 7-57
Sudheer Grandhi, InterDigital Communications, LLC

12. March 2010
Proposed Change (3/3)
Add Section: TDLS AP Connection Period Request frame format
Include information fields: AP connection periodicity, Duration, Time reference, End Time, Cancellation
Sent either through AP or directly to TDLS peer
Add Section: TDLS AP connection Period Response frame format
Include information fields: Accept/Reject, Status code
Sudheer Grandhi, InterDigital Communications, LLC

13. March 2010
Summary
AP Connection Periods during TDLS operation needed to support applications that require internet access.
Two options/approaches suggested for supporting such a mechanism: (1) Inclusion in existing messages (2) New messages (simple and preferred solution)
Sudheer Grandhi, InterDigital Communications, LLC