1 / 8

Block Ack Identifier

Block Ack Identifier. Ivan Oakes, STMicroelectronics July 2004. Immediate Block Ack. Block Ack has both Immediate and Delayed forms In the Immediate form BlockAck is sent SIFS - (RxTxTurnAroundTime) after BlockAckReq

alfreda-hughes
Download Presentation

Block Ack Identifier

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. Block Ack Identifier Ivan Oakes, STMicroelectronics July 2004 Ivan Oakes, STMicroeletronics

  2. Immediate Block Ack • Block Ack has both Immediate andDelayed forms • In the Immediate form BlockAck is sent SIFS - (RxTxTurnAroundTime)after BlockAckReq • Typically hardware must lookup TA and TID and obtain the corresponding BlockAckBitmap – can this be simplified? Ivan Oakes, STMicroeletronics

  3. Adding Block Ack Identifier • This process can be simplified if a BlockAckIdentifier (“BID”) is exchanged at initialisation • The process being similar to use of AID in Association + PS-Poll . • BID would be 16bit and assigned by the receiver using an algorithm of its choosing in response to a ADDBA request Ivan Oakes, STMicroeletronics

  4. Adding Block Ack Identifier • The BID is used by the originator when requesting with a BlockAckReq • The receiver can use the BID to look up the appropriate BlockAck bitmap quickly • For example by allocating the BID as an index into an array of bitmaps - the choice of BID is up to the implementer of the receiver Ivan Oakes, STMicroeletronics

  5. BID - Example Of Use ADDBS.Req Allocate BID, e.g. 0, 1, or 2 as index into records ADDBS.Res(BID) Records of receive Success 0 1 DATA 2 Database of Records One per TA + TID BID Used to lookup quickly Bitmap BlockAckReq(BID) SIFS BlockAck(Bitmap) Ivan Oakes, STMicroeletronics

  6. Block Ack Identifier - Changes • ADDBA response (7.4.4.2) extended to have BID: • Order 7: BlockAckIdentifier (BID) • BlockAckReq modified to have BID • “BAR Control” replaced BID (16 bits) Note: If the receiver sets BID = TID in ADDBA response, then there is no change to the BlockAckReq from draft 802.11e-D8. Ivan Oakes, STMicroeletronics

  7. Block Ack Identifier • Full text of change is in document11-04-0745-00-000e Motion follows… Ivan Oakes, STMicroeletronics

  8. Motion • Request that the Editor incorporate changes in Document 11-04-0745-00-000e relating to Block Ack Identifier (BID) into the TGe draft. Ivan Oakes, STMicroeletronics

More Related