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New Techniques Proposal – Spatial Frequency Sharing and BSS Management

New Techniques Proposal – Spatial Frequency Sharing and BSS Management. Date: 2010-05-19. Proposal overview. This presentation is part and in support of the complete proposal described in 802.11-10/432r2 (slides) and 802.11-10/433r2 (text) that: Supports data transmission rates up to 7 Gbps

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New Techniques Proposal – Spatial Frequency Sharing and BSS Management

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  1. New Techniques Proposal – Spatial Frequency Sharing and BSS Management Date: 2010-05-19 James Yee, MediaTek, et. al.

  2. James Yee, MediaTek, et. al.

  3. James Yee, MediaTek, et. al.

  4. James Yee, MediaTek, et. al.

  5. James Yee, MediaTek, et. al.

  6. Proposal overview • This presentation is part and in support of the complete proposal described in 802.11-10/432r2 (slides) and 802.11-10/433r2 (text) that: • Supports data transmission rates up to 7 Gbps • Supplements and extends the 802.11 MAC and is backward compatible with the IEEE 802.11 standard • Enables both the low power and the high performance devices, guaranteeing interoperability and communication at gigabit rates • Supports beamforming, enabling robust communication at distances beyond 10 meters • Supports GCMP security and advanced power management • Supports coexistence with other 60GHz systems • Supports fast session transfer among 2.4GHz, 5GHz and 60GHz James Yee, MediaTek, et. al.

  7. Motivations behind these New Techniques • Enhance performance… • In Dense environments • Via Clustering – coordinated beacon • Via Spatial sharing based on Interference Assessments • In the presence of clock drifts and BSS timing perturbations • Dynamic shifting and resizing of beacon interval • Support • Peer and Service Discovery James Yee, MediaTek, et. al.

  8. PCP/AP Clustering (9.24 of 11-10-0433-02[1]) May 2010 • Goal: improve OBSS performance in a dense environment. • Overview: a PCP/AP cluster consists of a Synchronization-PCP/AP and member PCPs/APs. The S-PCP/AP and member PCPs/APs of a cluster synchronize their Beacon Intervals (BIs) and may schedule transmissions in non-overlapping time periods with respect to each other. • Each member periodically transmit Beacons during scheduled Beacon SPs. Slide 8 James Yee, MediaTek, et. al.

  9. PCP/AP Clustering (cont’d) May 2010 • Cluster Formation • A distributed process with each joining PCP/AP monitoring for empty Beacon SPs for scheduling its own beacon transmission. • Cluster Maintenance • Non-PCP STAs may forward Cluster Report IE to its PCP/AP to assist in interference mitigation. • Also can request its PCP/AP to form a Cluster (i.e., upon detection of interference or if it desires to form a co-channel BSS) • S-PCP/S-AP handover to a member PCP/AP • In the event of a S-PCP/S-AP failure. • New Fields and Frame types • Beacon: PCP/AP Clustering Control field (7.2.4.1) • Cluster Report Element (7.3.2.109) • Fields defined to indicate whether the IE contains a Request or Report Slide 9 James Yee, MediaTek, et. al.

  10. Cluster Related Frames May 2010 • Optionally carried in mmWave Beacons • Cluster Report element Slide 10 James Yee, MediaTek, et. al.

  11. Spatial frequency sharing and Interference mitigation (11.33 of [1]) May 2010 • Interference Assessment • Should be based on Directional Channel Quality Request / Report (7.3.2.21.12, 7.3.2.22.11) to assess the possibility for spatial sharing of SPs, but is implementation dependent. • Spatial Sharing and Interference Mitigation • Spatial Sharing is achieved with SP scheduled to overlap with existing SPs based on the results of interference assessments. • STA may include the TSCONST field with the ADDTS request sent to the PCP/AP for interference mitigation. • New Fields and Frame types • Directional Channel Quality Request / Report • ANIPI (average noise plus interference power indicator) Slide 11 James Yee, MediaTek, et. al.

  12. Example: Spatial Sharing (11.33.4 of [1]) May 2010 • STAs should already be beamformed with each other. • Goal: Determine if SP1 and SP2 can overlap in time. Slide 12 James Yee, MediaTek, et. al.

  13. Directional Channel Quality Request / Reports May 2010 Slide 13 James Yee, MediaTek, et. al.

  14. Additional Frames for Interference Mitigation May 2010 • TS Schedule Constraint (TSCONST) in 7.3.2.97 Extended mmWave TSPEC Element • Constraint subfield Slide 14 James Yee, MediaTek, et. al.

  15. mmWave BSS Peer and Service Discovery (11.31 of [1]) May 2010 • A STA may request information about either a single STA in the PBSS or about all of the STAs in the PBSS • Using Action Frames • Information Request frame • Information Response frame Slide 15 James Yee, MediaTek, et. al.

  16. Changing mmWave BSS parameters (11.32 of [1]) May 2010 • Beacon timing • Moving the BT (11.32.1) • Changing BI duration (11.32.2) Slide 16 James Yee, MediaTek, et. al.

  17. Why change BSS parameters May 2010 • Interference Mitigation • Move beacon time in order to mitigate the effects of interfering overlapping BSS. • Adapting to Application timing requirements • Example, adapt MAC layer beacon interval timing with video frame timing. Slide 17 James Yee, MediaTek, et. al.

  18. Network Management May 2010 • Network Management (11.22 of [1]) • Allows Directed Multicast Service (DMS) described in 11.22.15 of the TGv draft [2] to work in a PBSS, where DMS-capable STA transmits group addressed MSDUs as individually addressed A-MSDUs. • DMS is well suited for directional 60GHz transmissions. Slide 18 James Yee, MediaTek, et. al.

  19. Summary May 2010 • Our proposal describes mechanisms proposed in 11-10-0433-02 [1] for spatial sharing and for performance enhancement in dense environments. • Clustering, Directional Channel Quality assessment. • Mechanisms for interference mitigation and application layer adaptation are also defined • moving of BT and changing of BI duration. • DMS Extensions to PBSS Slide 19 James Yee, MediaTek, et. al.

  20. References May 2010 • [1] 11-10-0433-02-00ad-CP-specification, PHY/MAC Complete Proposal to TGad, May 2010. • [2] IEEE P802.11v/D10.0 Slide 20 James Yee, MediaTek, et. al.

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