1 / 5

Error Recovery for TXOP Sharing

Error Recovery for TXOP Sharing. Authors:. Date: 2011-01-16. Outline. Motivation Error recovery rule for TXOP sharing. Error recovery rules for MU MIMO TXOP sharing need to be clarified. MU MIMO TXOP sharing allows multiple secondary ACs to be piggybacked with a primary AC

dustin-flowers
Download Presentation

Error Recovery for TXOP Sharing

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Error Recovery for TXOP Sharing Authors: Date:2011-01-16 Michelle Gong, et al

  2. Outline • Motivation • Error recovery rule for TXOP sharing Michelle Gong, et al

  3. Error recovery rules for MU MIMO TXOP sharing need to be clarified • MU MIMO TXOP sharing allows multiple secondary ACs to be piggybacked with a primary AC • The TXOP is obtained using EDCA parameters of the primary AC • In the following example: • AC_VI is the primary AC • AC_VO and AC_BE are secondary ACs • If traffic from multiple ACs are transmitted in one burst, which EDCAF should perform exponential backoff if there is a transmission failure? AC_VI (STA1) BAR BAR AP AC_VO(STA2) AC_BE(STA3) STA1 STA2 BA BA STA3 SIFS SIFS SIFS SIFS SIFS BA Michelle Gong, et al

  4. Error recovery procedure for an MU MIMO multi-AC TXOP is a simple extension of the existing error recovery procedure Backoff AC_VI backoff Doubles CW for AC_VI , no change to AC_VO and AC_BE AC_VI (STA1) AC_VO(STA2) AC_BE(STA3) AckTimeOut If a valid response to the initial frame of a TXOP is not received, the AP shall initiate an exponential backoff for the primary AC and resume the backoff procedure for the secondary ACs without changing their CWs The reason is that only the primary AC’s EDCA parameters are relevant in a shared TXOP Michelle Gong, et al

  5. Pre-motion 1 Do you support updating the TGac spec framework to include the following protocol rule? • For MU MIMO TXOP sharing: • If a valid response to the initial frame of a TXOP is not received, the AP shall initiate an exponential backoff for the primary AC Michelle Gong, et al

More Related