1. doc.: IEEE 802.11-13/0433r0 SubmissionSlide 1 Date: 2013-04-24 Presenter: MAC Protocol to Support Dynamic Bandwidth for 802.11aj (60GHz) Xiaoming Peng April 2013

2. doc.: IEEE 802.11-13/0433r0 Submission Author List Slide 2Xiaoming Peng April 2013

3. doc.: IEEE 802.11-13/0433r0 Submission Abstract This document is to propose a channelization for China 60GHz frequency band for 802.11aj (60GHz) This document is to propose a MAC protocol amendment to support dynamic bandwidth for 802.11aj (60GHz) This contribution has been discussed in CWPAN group Slide 3Xiaoming Peng April 2013

4. doc.: IEEE 802.11-13/0433r0 Submission Background: China 60GHz Spectrum The released 60GHz spectrum in China only has 5GHz bandwidth, corresponding to channel 2 & 3 used in IEEE 802.11ad. USA, Canada, Korea Europe China Japan Australia Slide 4Xiaoming Peng April 2013

5. doc.: IEEE 802.11-13/0433r0 Submission Proposed Channelization for 60GHz bands for 802.11aj (1/2) Advantage of the proposed channelization for 60GHz bands in China  China only has 5GHz bandwidth available in 59-64GHz  only has two logical channels if only use 2.16 GHz BW  Further divide 2.16GHz band used in 802.11ad channelization into two 1.08GHz sub-bands, then it become 6 logical channels: 2 bands with 2.16GHz bandwidth (Channel 2 & 3), 4 bands with 1.08GHz bandwidth (Channel 5, 6, 7, 8) ； 5 Channelization for 60GHz bands in China Xiaoming Peng April 2013

6. doc.: IEEE 802.11-13/0433r0 Submission Proposed Channelization for 60GHz bands for 802.11aj (2/2) Support dynamic bandwidth  Capable of supporting wider applications for lower power, e.g. Smart Phone, Tablet etc.  The impact to implementation in RF, Analog baseband is very minimal. It only needs to add to support four more new center frequency in PLL design, a new filter to support 1.08GHz in analog baseband etc ；  The support of dynamic bandwidth in the channelization for China 60GHz bands provides the basis of keeping the interoperability with 802.11ad device ； 6 Channelization for 60GHz bands in China Xiaoming Peng April 2013

7. doc.: IEEE 802.11-13/0433r0 Submission Proposed MAC Protocol amendment for 802.11aj: support dynamic bandwidth and keep interoperability with 802.11ad  When operating in 2.16GHz channel （ Channel 2,3) ， it is capable of keeping interoperability with 802.11ad device ；  When operating in 1.08GHz （ Channel 5,6,7,8 ）， it sends common beacon over 2.16GHz channel. The common beacon can use 802.11ad beacon as baseline so that 802.11ad device can also recognize the common beacon;  This allows 802.11aj device to keep the interoperability with 802.11ad device while exploring the benefits in channels with 1.08GHz bandwidth. MAC Protocol: Support Dynamic Bandwidth Proposed frame structure for IEEE 802.11aj Revised 60GHz Channelization Common Beacon (e.g., 802.11ad DMG Beacon frames) Slide 7Xiaoming Peng April 2013

8. doc.: IEEE 802.11-13/0433r0 Submission Proposed MAC Protocols (1) PCP/AP 1 operates in Channel 2 with 3 devices (STA 1, STA 2 and STA 3) STA (to become PCP/AP 2) wants to share Channel 2 –STA (to become PCP/AP 2) joins PCP/AP 1’s network and requests for the split of Channel 2. 9 Xiaoming Peng Channel Split Request frame Action field format OrderInformation 1Category 2DMG Action 3Dialog Token 4Channel Switch Announcement element April 2013

9. doc.: IEEE 802.11-13/0433r0 Submission Proposed MAC Protocols (2) Proposed Frame Structure to support Dynamic Bandwidth for 802.11aj 10 Xiaoming Peng OrderInformation 1Category 2DMG Action 3Dialog Token 4Channel Splitting field 5Beacon Interval field (optional) 6Channel Switch Announcement element (optional) 7Extended Schedule element (optional) Channel Split Response frame Action field format If PCP/AP 1 agrees to split Channel 2 –PCP/AP 1 replies a Channel Split Response frame to the STA (to become PCP/AP 2). –PCP/AP 1 informs other STAs through a Channel Switch Announcement element contained in DMG Beacon/Announce frames. –PCP/AP 1 proceeds to split Channel 2 April 2013

10. doc.: IEEE 802.11-13/0433r0 Submission Proposed MAC Protocols (3) After the split of Channel 2 into Channel 5 and Channel 6, –PCP/AP 1 sends out common DMG beacons in Channel 2 during NP1 to announce its operation and shows its channel bandwidth status (using the reserved B44-45 to indicate Channel Bandwidth info) contained in Beacon Interval Control field. –Following which PCP/AP 2 (The STA become PCP/AP 2) sends out common DMG beacon in Channel 2 during NP2 to announce its operation and shows its channel bandwidth status. PCP/AP 1 and PCP/AP 2 each creates a quiet period (QP) in their respective networks. PCP/AP 2 synchronizes with PCP/AP 1 by receiving the time stamps in PCP/AP 1’s common DMG beacons in its BTI. Non-AP/non-PCP STAs continue their packet transmissions in small band network in Channel 5 after tuning in and receiving the DMG Beacon frames sent out by PCP/AP 1 in its BTI, coupled with the necessary procedures like beamforming, associations and new schedules for service periods (SPs) and contention-based periods (CBAPs). Non-AP/non-PCP devices STAs that want to join the network in Channel 6 have to tune in and receive DMG Beacon frames sent by PCP/AP 2 in its BTI, coupled with the necessary procedures. 11 Xiaoming Peng April 2013

11. doc.: IEEE 802.11-13/0433r0 Submission Proposed MAC Protocols (4) Constant monitoring of Channel 2 common DMG beacons sent out by PCP/APs 1 and 2 in NP1 and NP2, respectively. Assume Channel 5 ceases its network operation. –Absence is noted by PCP/AP 2 when it detects no common DMG beacon frames sent during NP1. –PCP/AP 2 shall wait for a aMaxExpireDuration duration before making the decision that Channel 5 network has ceased operation. Case 1: After which, the PCP/AP 2 can proceed to expand its bandwidth from Channel 6 to Channel 2 (see the following figure), or Case 2: After which, the PCP/AP2 can proceed to remain its operation in Channel 6. 12 Xiaoming Peng April 2013

12. doc.: IEEE 802.11-13/0433r0 Submission Case Study A: Support Dynamic Bandwidth Case A: Two PCP/APs operate in two adjacent small bands within the same large band. Slide 12Xiaoming Peng April 2013

13. doc.: IEEE 802.11-13/0433r0 Submission Case Study B: Support Dynamic Bandwidth Case B: Only one PCP/AP operates in a small band when the adjacent small band is unoccupied. Slide 13Xiaoming Peng April 2013

14. doc.: IEEE 802.11-13/0433r0 Submission Case Study C: Support Dynamic Bandwidth Case C: Only one PCP/AP operates in a large band when the large band is available. Slide 14Xiaoming Peng This is similar to 802.11ad April 2013

15. doc.: IEEE 802.11-13/0433r0 Submission Conclusion This presentation proposed a channelization for China 60GHz frequency band for 802.11aj (60GHz) This presentation proposed a MAC protocol amendment to support dynamic bandwidth for 802.11aj (60GHz) Xiaoming PengSlide 15 April 2013

16. doc.: IEEE 802.11-13/0433r0 Submission Reference [1] 11-12-1197r0 - Physical Channel Consideration for Chinese 60GHz band [2] 11-13-0176r0 - Proposal of Channelization for 802.11aj [3] 11-13-0175r1 - Backward Compatibility Feature for 802.11aj [4] 11-12-0140r9 - IEEE 802.11.aj PAR [5] 11-12-0141r7 - IEEE 802.11.aj 5C Slide 16Xiaoming Peng April 2013

17. doc.: IEEE 802.11-13/0433r0 SubmissionSlide 17 Thank YOU Xiaoming Peng April 2013