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New Techniques Proposal – Spatial Frequency Sharing and BSS Management

New Techniques Proposal – Spatial Frequency Sharing and BSS Management. May 2010. Date: 2010-05-01. Slide 1. James Yee, MediaTek, et. al. May 2010. Slide 2. James Yee, MediaTek, et. al. May 2010. Slide 3. James Yee, MediaTek, et. al. May 2010. Slide 4.

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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 May 2010 Date: 2010-05-01 Slide 1 James Yee, MediaTek, et. al.

  2. May 2010 Slide 2 James Yee, MediaTek, et. al.

  3. May 2010 Slide 3 James Yee, MediaTek, et. al.

  4. May 2010 Slide 4 James Yee, MediaTek, et. al.

  5. Proposal overview May 2010 • This presentation is part and in support of the complete proposal described in 802.11-10/432r0 (slides) and 802.11-10/433r0 (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 Slide 5 James Yee, MediaTek, et. al.

  6. 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.

  7. PCP/AP Clustering (9.24 of [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 7 James Yee, MediaTek, et. al.

  8. 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 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 • 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 8 James Yee, MediaTek, et. al.

  9. Cluster Related Frames May 2010 • Optionally carried in mmWave Beacons • Cluster Report element Slide 9 James Yee, MediaTek, et. al.

  10. Spatial frequency sharing and Interference mitigation (11.33 of [1]) May 2010 • Interference Assessment • Using Directional Channel Quality Request / Report (7.3.2.21.12, 7.3.2.22.11) to assess the possibility for spatial sharing of SPs. • Spatial Sharing and Interference Mitigation • Spatial Sharing is achieved with SP scheduled to overlap with existing SPs based on the results of interference assessments. • New Fields and Frame types • Directional Channel Quality Request / Report • ANIPI (average noise plus interference power indicator) Slide 10 James Yee, MediaTek, et. al.

  11. 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 11 James Yee, MediaTek, et. al.

  12. Directional Channel Quality Request / Reports May 2010 Slide 12 James Yee, MediaTek, et. al.

  13. 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 13 James Yee, MediaTek, et. al.

  14. 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 14 James Yee, MediaTek, et. al.

  15. 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 15 James Yee, MediaTek, et. al.

  16. Network Management May 2010 • Network Management (11.22 of [1]) • Allows Directed Multicast Service (DMS) described in 11.22.15 of the TGv draft [3] 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 16 James Yee, MediaTek, et. al.

  17. Summary May 2010 • Our proposal describes mechanisms proposed in 11-10-0433-00 [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 17 James Yee, MediaTek, et. al.

  18. References May 2010 • [1] 11-10-0433-00-00ad-CP-specification, PHY/MAC Complete Proposal to TGad, May 2010. • [2] 11-10-0432-00-00ad-CP-presentation, PHY/MAC Complete Proposal to TGad, May 2010. • [3] TGv draft d10.0 Slide 18 James Yee, MediaTek, et. al.

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