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Doc.: IEEE 802.11-15/0150r0 Submission May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 1 GCR using SYNRA for GLK Date: 2015-01-13 Authors:

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Presentation on theme: "Doc.: IEEE 802.11-15/0150r0 Submission May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 1 GCR using SYNRA for GLK Date: 2015-01-13 Authors:"— Presentation transcript:

1 doc.: IEEE 802.11-15/0150r0 Submission May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 1 GCR using SYNRA for GLK Date: 2015-01-13 Authors:

2 doc.: IEEE 802.11-15/0150r0 Submission May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 2 Abstract Described the GCR protocol and proposes changes that makes GCR use SYNRA and hence support GLK. Note that DMG STAs do not support GCR (Cl. 4.3.20, Cl. 10.24.16.1) GCR is only supported if dot11RobustAVStreamingImplemented is true, which is true if and only if dot11DMSImplemented and dot11HighThroughputOptionImplemented are true.

3 doc.: IEEE 802.11-15/0150r0 Submission AP functions – GCR modifications A SYNRA is constructed every time a GLK STA associates. The SYNRA represents an RA that excludes the STA but includes all other STAs in the BSS –AP constructs as many SYNRAs as there are GLK STAs associated with the AP –STA’s Group membership is known to the AP (no need to exchange Group Membership Request/Response frames) –The AP deletes the SYNRA corresponding to the GLK STA when the GLK STA gets disassociated from the BSS A GCR Service is setup for every SYNRA –What is the choice of retransmission policy? Block ACK when SYNRA represents a small (< 10) GLK STAs; unsolitied retries, otherwise. –AP implicitly does the GCR Service setup which may be modified if the AP decides to move between Block ACKs and Unsolicited Retries –Since GCR Service setup is implicit (no explicit DMS Request from GLK STAs), unsolicited transmission of DMS Response that includes a GCR Response element is needed (this tells the member STAs what retransmission policy is used for the GCR) – Cl. 10.24.16.3.3 May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 3

4 doc.: IEEE 802.11-15/0150r0 Submission AP Functions – GCR Modifications Support for GLK should imply support for GCR –The spec mandates it only for dot11GCRActivated implementations If one or more GLK STAs go into PS mode, the AP will not buffer packets destined to those GLK STAs –Should buffering be enabled conditionally based on the knowledge AP has on PS? Buffer if the PS Duration is short and skip buffering otherwise? AP will advertise what it considers is a short PS Duration If buffering is enabled GCR-SP delivery allows for low latency delivery of buffered frames. May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 4

5 doc.: IEEE 802.11-15/0150r0 Submission GLK STA functions – GCR Modifications Support for GLK should imply support for GCR –The spec mandates it only for dot11GCRActivated implementations Receive and process autonomous DMS Response frames that include a GCR Response element –Handle corresponding GCR frames received appropriately Drop duplicates, respond to BARs, etc No need for a GCR Concealment Address –The non-AP STA need not pay attention to the GCR Concealed Address field in the GCR Response from the AP May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 5

6 doc.: IEEE 802.11-15/0150r0 Submission GATS DMS – directed multicast GCR – unsolicited retries GCR Advanced – block ACK and GCR-SP GCR for Mesh GCR phases -- announcement, setup, modification, and teardown GCR group addressed MSDUs shall be sent in an A- MSDU when –Retransmitted via the GCR unsolicited retry or GCR block ack retransmission policies or –Transmitted via the GCR-SP delivery method. May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 6

7 doc.: IEEE 802.11-15/0150r0 SubmissionOsama Aboul-Magd (Huawei Technologies)Slide 7 Overview of the GCR Protocol May 2013 STAAP/MAP DMS Request with GCR Request Element DMS Response with GCR Response Element DMS Request with GCR Request Element DMS Response with GCR Response Element Announce Teardown DMS Request with GCR Request Element DMS Response with GCR Response Element Setup...... GCR transmission of MSDU/A-MSDU

8 doc.: IEEE 802.11-15/0150r0 Submission Overview of the frames DMS Request – a set of DMS Request elements DMS Response – a set of DMS Response elements DMS Request element – a DMS Descriptor List (8.4.2.87) DMS Response element – a DMS Status List (8.4.2.88) May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 8

9 doc.: IEEE 802.11-15/0150r0 Submission DMS Descriptor Zero or moe DMSIDDMS Length Request Type TCLAS elements TCLAS processing element (optional) TSPEC element (optional) Optional subelements octets111variable0 or 30 or 57variable May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 9 DMSID – 0 when Request Type is ‘add’; otherwise an AP assigned DMSID is used Request Type – add/remove/change TCLAS elements – one or more if the Request Type is ‘add’ Optional subelements – GCR Request GATS Retransmission Policy – DMS/GCR Unsolicited Retries/GCR Block ACK GCR Delivery Method – no preference/non-GCR-SP/GCR-SP GCR Request Subelement IDLengthGATS Retransmission Policy GCR Delivery Method octets8844

10 doc.: IEEE 802.11-15/0150r0 Submission DMS Status DMSID – An AP assigned DMSID is used Response Type – Accpt/Denied/Terminate/GCR Advertise TCLAS elements – one or more if the Request Type is ‘add’ Optional subelements – GCR Response GATS Retransmission Policy – DMS/GCR Unsolicited Retries/GCR Block ACK GCR Delivery Method – no preference/non-GCR-SP/GCR-SP May 2013 Osama Aboul-Magd (Huawei Technologies)Slide 10 DMS StatusZero or moe DMSIDDMS Length Request Type Last Sequence Control TCLAS elements TCLAS processing element (optional) TSPEC element (optional) Optional subelements octets1112variable0 or 30 or 57variable GCR Response Subelement ID LengthGATS Retransmission Policy GCR Delivery Method GCR Concealed Address Schedule Element Octets110 or 1 0 or 60 or 14

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