Reception Status of Frames Transmitted in Random Access RUs

Slides:



Advertisements
Similar presentations
PS-Poll TXOP Using RTS/CTS Protection
Advertisements

Submission doc.: IEEE /0608r1 May 2015 Tomoko Adachi, ToshibaSlide 1 Regarding trigger frame in UL MU Date: Authors:
Submission doc.: IEEE 11-15/0550r0 May 2015 K. Yunoki and B. Zhao, KDDI R&D Labs.Slide 1 L-Preamble Issues for UL-OFDMA Date: Authors:
Submission doc.: IEEE /0064r1 January 2015 Tomoko Adachi, ToshibaSlide 1 Consideration on UL-MU overheads Date: Authors:
Submission doc.: IEEE /0567r0 May 2015 Xiaofei Wang (InterDigital)Slide 1 Multi-STA BA for SU Transmissions Date: Authors:
Submission Vida Ferdowsi, NewracomSlide 1 doc.: IEEE /0856r0July 2015 Compressed Uplink Trigger Frame Date: Authors:
Doc.: IEEE /0840r1 Submission AP Assisted Medium Synchronization Date: Authors: September 2012 Minyoung Park, Intel Corp.Slide 1.
Submission doc.: IEEE /1097r1 September 2015 Narendar Madhavan, ToshibaSlide 1 Reducing Channel Sounding Protocol Overhead for 11ax Date:
Doc.: IEEE /1280r1 November 2015 SubmissionStéphane Baron et. al., Canon Traffic priority for random Multi User Uplink OFDMA Date: Slide.
Doc.: IEEE /1047r0 September 2015 SubmissionStéphane Baron et. al., Canon Random RU selection process upon TF-R reception Date: Slide.
Submission September 2015 doc.: IEEE /1327r0 November 2015 Yujin Noh, Newracom Slide 1 Diversity Mode in OFDMA Date: Authors:
Doc.: IEEE /0066r0 Submission January 2015 Yongho Seok, NEWRACOM Downlink OFDMA Protocol Design Date: Authors: Slide 1.
Doc.: IEEE /1052r0 SubmissionSlide 1Young Hoon Kwon, Newracom Bandwidth for UL MU Transmission Date: Authors: September 2015.
Submission doc.: IEEE /1098r1 September 2015 Narendar Madhavan, ToshibaSlide 1 ACK/BA frame for UL MU under cascading structure Date:
Submission doc.: IEEE /0881r1 July 2015 Woojin Ahn, Yonsei Univ.Slide 1 Regarding buffer status of UL-STAs in UL- OFDMA Date: Authors:
Submission doc.: IEEE /0854r2 July 2015 Tomoko Adachi, ToshibaSlide 1 DL OFDMA Signalling Date: Authors:
Submission doc.: IEEE /1340r2 November 2015 Narendar Madhavan, ToshibaSlide 1 NDP Announcement for HE Sequence Date: Authors:
Submission doc.: IEEE /1116r1 September 2015 Jinsoo Ahn, Yonsei UniversitySlide 1 Trigger Frame Channel Access Date: Authors:
Submission doc.: IEEE /1340r0 November 2015 Narendar Madhavan, ToshibaSlide 1 NDP Announcement for HE Sequence Date: Authors:
Doc.: IEEE /0591r1 May 2016 SubmissionPatrice NEZOU et al., Canon Issues related to OCW management Date: Slide 1 Authors: NameAffiliationAddress .
HE Trigger Frame Format
Submission doc.: IEEE /0674r0 May 2016 Hanseul Hong, Yonsei UniversitySlide 1 EIFS excess problem of Acknowledgement for UL MU procedure Date:
Doc.: IEEE /0048r0 SubmissionSlide 1Young Hoon Kwon, Newracom Protection using MU-RTS/CTS Date: Authors: January 2016.
Doc.: IEEE /0333r0 March 2016 SubmissionStéphane Baron et al., Canon Issue related to unused UL OFDMA RUs Date: Slide 1 Authors: NameAffiliationAddress .
Multi-STA BA Design Date: Authors: March 2016 Month Year
Location Measurement Protocol for Unassociated STAs
MU BAR Frame Format Date: Authors: November 2015 Month Year
UL OFDMA Random Access Control
WUR coexistence with existing power save mode
Compressed Uplink Trigger Frame
How to collect STAs’ Tx demands for UL MU
AP access procedure for UL MU operation
WUR Acknowledgement Indication
WUR Acknowledgement Indication
Traffic priority for random Multi User Uplink OFDMA
Further Discussion on “Lost Ack” During Unscheduled Service Period
Further Discussion on “Lost Ack” During Unscheduled Service Period
Channel Access for WUR FDMA
Resource Allocation for Unassociated STAs – Follow Up
Considerations on Trigger Frame for Random Access Procedure
Issues related to OCW management
Regarding HE NDPA frame for DL Sounding Sequence
Regarding UL MU protection
MAC Clarifications Date: Authors: September 2016
Performance evaluation of Real Time Communication over Wi-Fi
Usage Model for Power Saving AP
Follow up on Issue related to unused UL OFDMA RUs
Discussion on CR for CID 5066
Duration/ID field in UL-MU
Performance evaluation of Real Time Communication over Wi-Fi
WUR Acknowledgement Indication
Further Consideration for WUR Acknowledgement Indication
Performance evaluation of Real Time Communication over Wi-Fi
Regarding buffer status of UL-STAs in UL-OFDMA
Performance evaluation of Real Time Communications over Wi-Fi
Explicit Block Ack Request in DL MU PPDU
Performance evaluation of Real Time Communications over Wi-Fi
UL MU Random Access Analysis
Random Access UL MU Resource Allocation and Indication
Congestion control for UL MU random access
TGbb MAC Channel Access features proposal
TGbb MAC Channel Access features proposal
Multiplexing of Acknowledgements for Multicast Transmission
Channel Access for WUR FDMA
Considerations on post wake-up sequences
Considerations on Trigger Frame for Random Access Procedure
Further Consideration for WUR Acknowledgement Indication
Location Measurement Protocol for 11ax
Regarding trigger frame in UL MU
Consideration on Multi-AP Ack Protocol
Presentation transcript:

Reception Status of Frames Transmitted in Random Access RUs November 2015 doc.: IEEE 802.11-15/1341r1 November 2015 Reception Status of Frames Transmitted in Random Access RUs Date: 2015-11-09 Authors: Tomoko Adachi, Toshiba Tomoko Adachi, Toshiba

November 2015 doc.: IEEE 802.11-15/1341r1 November 2015 Abstract This presentation considers the reception status of UL frames transmitted in UL OFDMA-based random access. Tomoko Adachi, Toshiba Tomoko Adachi, Toshiba

UL OFDMA-based random access November 2015 UL OFDMA-based random access The detailed concept was presented in [1] and incorporated in [2]. An STA initializes its OBO to a random value in the range 0 to CWO. OBO is counted down equal to the number of random access RUs and when it becomes 0, the STA gets the right to access one of the random access RUs in the current TF-R. Tomoko Adachi, Toshiba

Discussion Points (1) –DL Rsp November 2015 Discussion Points (1) –DL Rsp Packet loss due to not only channel condition but also collision may occur by STAs selecting the same RU. For a STA to judge whether its transmission succeeded or not, want a DL response SIFS after its UL transmission. It can be a M-BA (or ACK) or a TF instead by determining new allocations for successful STAs. If it is a TF, the AP immediately needs to determine assignment info in SIFS, while a M-BA (or ACK) can gain processing time. TF-R RU 1 AID X RU 2 RU 3 STA 3 RU 4 AID 10 RU 5 AID 15 UL-OFDMA DL Rsp STA 10 STA 1 STA 2 STA 15 STA 3can know it succeeded and STAs 1 and 2 can know they failed by DL Rsp STAs 1-3 get the right to access random access RUs t SIFS Tomoko Adachi, Toshiba

Discussion Points (2) – CWO selection November 2015 Discussion Points (2) – CWO selection CWOmin and CWOmax were introduced in [1] but how to select CWO from between them is not clarified. In CSMA/CA, retrying STAs increase CWO. This is to avoid accessing at the same time where number of contending STAs is unknown. All the STAs accessing at the same time will fail unless there is no capture effect. Should it be the same in UL OFDMA- based random access? Situation is a little bit different from CSMA/CA because there may be successful STAs while some fail in the same time frame. CW in CSMA/CA [3] Tomoko Adachi, Toshiba

Discussion Points (2) – CWO selection (cont’d) November 2015 Discussion Points (2) – CWO selection (cont’d) Way of re-selecting CWO Same as CSMA/CA Successful STAs will get unnecessary gain compared to failed STAs. Same CWO for both successful and failed STAs CWO will never be changed at STAs. What is the meaning of setting CWOmin and CWOmax, then? Give priority to failed STAs Can do this by changing CWO selection rule from CSMA/CA case. ex.1: Increase CWO when transmission succeeded. Note: Should take care of the reset condition. ex.2: Decrease CWO when transmission failed. Note: Should take care of the situation where all the transmissions in random access RUs fail and fall into deadlock. Tomoko Adachi, Toshiba

November 2015 Summary Reception status of frames transmitted in random access RUs was considered. In order for the STAs to judge whether their transmission succeeded or not, a DL response SIFS after their transmission is necessary. A TF might be used instead of a M-BA/ACK. Considering the situation that there may be STAs that succeeded and failed at the same time, that is different from CSMA/CA, giving priority to failed STAs in re- selecting CWO seems reasonable. Tomoko Adachi, Toshiba

November 2015 References [1] 802.11-15/1105r0 “UL OFDMA-based Random Access Procedure” [2] 802.11-15/0132r9 “Specification Framework for TGax” [3] IEEE Std 802.11-2012 Tomoko Adachi, Toshiba

November 2015 doc.: IEEE 802.11-15/1341r1 November 2015 Straw Poll 1 Do you think we should leave the possibility of using a TF as a DL response frame in substitution of a M- BA/ACK in UL-OFDMA random access sequence? Y:N:A = 7:13:26 Tomoko Adachi, Toshiba Tomoko Adachi, Toshiba

November 2015 Straw Poll 2 Do you think we should further consider a mechanism to solve the fairness issue among STAs that transmitted after the same TF-R, when failed STAs increase their CWOs while there are successful STAs not changing their CWOs? Y:N:A = 10:3:35 Tomoko Adachi, Toshiba