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Date: 2013-04-24

MAC Protocol to Support Dynamic Bandwidth for 802.11aj (60GHz). Date: 2013-04-24. Presenter:. Author List. This document is to propose a channelization for China 60GHz frequency band for 802.11aj (60GHz)

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Date: 2013-04-24

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  1. MAC Protocol to Support Dynamic Bandwidth for 802.11aj (60GHz) Date: 2013-04-24 Presenter: Xiaoming Peng

  2. Author List Xiaoming Peng

  3. 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 Abstract Xiaoming Peng

  4. 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 Japan China Australia Xiaoming Peng

  5. 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)； Proposed Channelization for 60GHz bands for 802.11aj (1/2) Channelization for 60GHz bands in China Xiaoming Peng

  6. 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； Proposed Channelization for 60GHz bands for 802.11aj (2/2) Channelization for 60GHz bands in China Xiaoming Peng

  7. 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 Revised 60GHz Channelization Proposed frame structure for IEEE 802.11aj Common Beacon (e.g., 802.11ad DMG Beacon frames) Xiaoming Peng

  8. 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. Channel Split Request frame Action field format Xiaoming Peng

  9. Proposed MAC Protocols (2) • 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 Channel Split Response frame Action field format Xiaoming Peng Proposed Frame Structure tosupport Dynamic Bandwidth for 802.11aj

  10. 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 STAscontinue 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. Xiaoming Peng

  11. 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. Xiaoming Peng

  12. Case A: Two PCP/APs operate in two adjacent small bands within the same large band. Case Study A: Support Dynamic Bandwidth Xiaoming Peng

  13. Case B: Only one PCP/AP operates in a small band when the adjacent small band is unoccupied. Case Study B: Support Dynamic Bandwidth Xiaoming Peng

  14. Case C: Only one PCP/AP operates in a large band when the large band is available. Case Study C: Support Dynamic Bandwidth This is similar to 802.11ad Xiaoming Peng

  15. 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) Conclusion Xiaoming Peng

  16. [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 Reference Xiaoming Peng

  17. Thank YOU Xiaoming Peng

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