AP Connection Period in TDLS

1. AP Connection Period in TDLS Authors: Date: 2010-03-16 Sudheer Grandhi, InterDigital Communications, LLC

2. 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

3. 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 • AP Connection period “Capability” • AP Connection period “Setup” (and “Cancellation”) • AP Connection Period “Activity” Sudheer Grandhi, InterDigital Communications, LLC

5. 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 • 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 • Option1: Modify/Use 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 : Option1 • TDLS Setup messages modified to include AP Connection Period information • TDLS Peer PSM messages( two possibilities) • Modified to include AP Connection Period information • Used as is but make specification clear to allow AP connection during Peer PSM “non-Awake” time • TDLS Channel Switch messages( two possibilities) • Modifiedto include AP Connection Period information • Used as is but make specification clear on how AP connection may be achieved Sudheer Grandhi, InterDigital Communications, LLC

9. AP Connection Period Setup : Option 2 • 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 • Sent either through AP or directly to TDLS peer • Includes information: Accept/Reject, Status code. Sudheer Grandhi, InterDigital Communications, LLC

10. AP Connection Period Activity • If TDLS STA on “Base Channel” • Connect/communicate with AP • If TDLS STA on “Off Channel” • Switch to “Base Channel” • Connect/communicate with AP • 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

11. Proposed Change (1/4) • Add the following section: 11.19.7 AP Connection Period in TDLSA 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

12. Proposed Change (2/4) • Update specification with text to “Use as is” or “Modify” for AP Connection purposes in Section 7.4.11 • TDLS Setup messages • TDLS Peer PSM messages • TDLS Channel Switch messages Sudheer Grandhi, InterDigital Communications, LLC

13. Proposed Change (3/4) • Insert the following two lines in Table 7-57 in Section 7.4.11: • 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

14. Proposed Change (4/4) • Add Section: 7.4.11.13 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: 7.4.11.14 TDLS AP connection Period Response frame format • Include information fields: Accept/Reject, Status code • Sent either through AP or directly to TDLS peer Sudheer Grandhi, InterDigital Communications, LLC

15. Summary • AP Connection Periods during TDLS operation needed to support applications that require internet access. • Two options/approaches suggested for supporting such a mechanism: • Option (1) Use/Modify existing messages • Option (2) New messages Sudheer Grandhi, InterDigital Communications, LLC