IEEE 802.11ay Multi-TID Aggregation Proposal
"Explore the proposal for enhancing Multi-TID Aggregation in IEEE 802.11-16/xxxxr0 standard to improve efficiency in 60GHz data transmission. The document discusses the limitations of existing BlockAck schemes, suggests enhancements for better link utilization, and addresses design principles for Multi-TID BlockAck support."
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July 2016 doc.: IEEE 802.11-16/xxxxr0 Multi-TID Aggregation for 11ay Date: 2016-07-24 Authors: Name Jinjing Jiang Affiliations Address Marvell Phone email jinjing@marvell.com Solomon.triaining@intel.c om carlos.cordeiro@intel.com Solomon Trainin Intel Carlos Cordeiro Intel Submission Slide 1 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 Introduction Future 60GHz PHY rate may hit ~100Gbps Multiple studies have shown that existing BlockAck scheme limits the efficiency of future 60GHz data pipe Overhead (preamble plus IFSs) is eminent when data payload is comparably short One enhancement of BlockAck scheme has been adopted in the Spec Framework [1] Increase BA window size from 64 to 1024 Submission Slide 2 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 Proposal for More Enhancement Multi-TID Aggregation There could be multiple flows among a pair of STAs, which have different QoS requirement Enable Aggregation of unicast Management Frame and single Data MPDU soliciting ACK It is not efficient in terms of link utilization to insert {single frame + ACK} exchanges in between high rate data frame exchange Management frame that asks for ACK is not allowed in AMPDU Single data MPDU from other TIDs Submission Slide 3 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 Design Principle for Multi-TID BA Support Existent structure of multi-TID BA defined in 11mc (9.3.1.9.4 Multi- TID BlockAck variant) contains multiple instances of the BA Information field with full size BA Bitmap, which increases the PPDU size almost in proportion to the number of delivered TIDs Byte count of the multi-TID BA is equal to (22+N*12), there N is number of TIDs sent in the same A-MPDU. If this approach is used for the extended BA Bitmap size of 1024 bits, the byte count becomes 22+N*(4+128) This substantially exceeds the optimal PPDU size (BA) compared to a single BA Bitmap of 1024 bits. N 1 2 4 8 BA Length (us) 3.96 4.84 6.58 10.36 Submission Slide 4 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 EDMG Multi-TID BA Variant Indication In latest 11ax/11ak draft spec, BlockAck Frame encoding is shown as the following BA Type BlockAck frame variant 0 0 Basic BlockAck Reserved Reserved Reserved Compressed BlockAck GLK-GCR BlockAck GCR BlockAck Reserved Extended Compressed BlockAck Reserved Reserved Reserved Multi-TID BlockAck Multi-STA BlockAck Extended Multi-TID BlockAck Reserved 00 01 10 11 00 01 10 11 00 01 10 11 00 01 10 11 0 1 1 0 1 1 Submission Slide 5 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 EDMG Multi-TID BA Format for Enabling Aggregation Submission Slide 6 Jinjing Jiang, Marvell
July, 2016 doc.: IEEE 802.11-16/xxxxr0 Reference [1] 11-15-1358-04-00ay-specification-framework-for- tgay Submission Slide 7 Jinjing Jiang, Marvell
doc.: IEEE 802.11-16/xxxxr0 Straw Poll/Motion 1 Do you agree to add to 11ay Specification: the extended Multi-TID BA variant for EDMG STAs is signaled by setting B1B2B3B4 == 1110 of the BA Control subfield? Y N A Submission
July, 2016 doc.: IEEE 802.11-16/xxxxr0 Straw Poll/Motion 2 Do you agree to add to 11ay Specification: the extended Multi-TID BA variant for EDMG STAs has the format as shown below. Y N A Submission Slide 9 Jinjing Jiang, Marvell
