tag:blogger.com,1999:blog-4773314040776233134.post6681020303074091781..comments2024-03-08T00:46:56.200-08:00Comments on Wi-Fi notebook: 11n Block AcknowledgementSumanth Kavurihttp://www.blogger.com/profile/11033407265529189813noreply@blogger.comBlogger22125tag:blogger.com,1999:blog-4773314040776233134.post-88096787354359572792021-07-13T04:40:21.162-07:002021-07-13T04:40:21.162-07:00My Quickbooks Support provides complete assistance...My Quickbooks Support provides complete assistance that helps to avoid any kind of delay and also take complete care of the financial information of your business. Please Call at +1 8334250444.<br /><a href="https://myquickbook.com/" rel="nofollow">My Quick Books</a><br />Thanks for the visit our website<br /><br />Quick Bookhttps://www.blogger.com/profile/16697184776393204490noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-23924559248085062102021-05-20T04:07:30.712-07:002021-05-20T04:07:30.712-07:00Hey! What a wonderful blog. I loved your blog. Qui...Hey! What a wonderful blog. I loved your blog. QuickBooks is the best accounting software, however, it has lots of bugs like QuickBooks Error. To fix such issues, you can contact experts via <a href="https://local.google.com/place?id=13955325213352415079&use=srp" rel="nofollow"> QuickBooks Customer Service </a>Lauren Kathyhttps://www.blogger.com/profile/06643156998170761114noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-14987986327884364652020-02-20T01:01:41.686-08:002020-02-20T01:01:41.686-08:00 starting sequence number + bit number. would you ... starting sequence number + bit number. would you help to explain that?<br />why starting sequence number 3 + bit number 03 = 3 and 4 Anonymoushttps://www.blogger.com/profile/12788643787547687712noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-47087302364765711572019-09-11T03:41:05.558-07:002019-09-11T03:41:05.558-07:00Hi ,
I had a doubt regarding frames in aggregatio...Hi , <br />I had a doubt regarding frames in aggregation,may i know after how many frames transfer client can initiate a block ack request.Thanks in advanceAnonymoushttps://www.blogger.com/profile/11308856081058551468noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-10374181598821841442017-11-07T04:45:36.952-08:002017-11-07T04:45:36.952-08:00There is alot of documentation out there describin...There is alot of documentation out there describing WHAT the mechanics are behind aggregation and block ack, and the high level advantages and disadvantages are clearly cited, and it is clear that either side may initiate Block ACK session(s). However, I do not see clear documentation as to WHY Aggregation and Block ACK would/should be initiated... what are some clear and exact thresholds and triggers to consider related to (either or both sides) starting or stopping Aggregation/BlockACK? Thanks in advance for feedback...Anonymoushttps://www.blogger.com/profile/01700472998634358795noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-67623641091484112332017-07-27T09:28:53.520-07:002017-07-27T09:28:53.520-07:00Hi Sumanth,
Thanks for explanation.
I have one d...Hi Sumanth,<br /><br />Thanks for explanation.<br /><br />I have one doubt like, In what scenarios the individual MPDU's can miss in one aggregated packet, and how recipient will reply with Block Ack bitmap field.<br /><br />Thanks in advance. Anonymoushttps://www.blogger.com/profile/08612571581506955696noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-42968446941399385542017-06-23T04:33:47.773-07:002017-06-23T04:33:47.773-07:00Simple yet effective article !!!!
Does block ACK w...Simple yet effective article !!!!<br />Does block ACK works only with AMPDU enabled only, Can it work with AMPDU disabled and AMSDU enabled?Ahsel Ahmedhttps://www.blogger.com/profile/06125457605812503115noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-68253456948158056072017-06-21T14:17:50.779-07:002017-06-21T14:17:50.779-07:00Hello, first thanks for sharing so valuable knowle...Hello, first thanks for sharing so valuable knowledge.<br /><br />I have some questions about ADDBA, don't know if you could do me a favor to answer it.<br /><br />I am solving a bug about ADDBA of my android board. My board uses wl12xx as wifi moudule. wl12xx can only handle 3 BA sessions.<br /><br />If AP requests more than 3 BA sessions, wl12xx driver will print log: "wl12xx: ERROR exceeded max RX BA sessions".<br /><br />So the first question is: how does AP decide the number of BA sessons(also the number of TIDs)? <br />I cannot find any code to negociate the BA session number. How did the AP know it should only use 3 TIDs?<br />I didn't see the message in normal case: "wl12xx: ERROR exceeded max RX BA sessions". Only occasionally, I can see this message.<br /><br />I have trid on 2 different APs:<br /><br />the 1st AP use TID values: 0, 1, 2<br />the 2nd AP use TID values: 0, 2, 3<br /><br />so the second question: How does AP decide TID values?<br /><br />Thanks!<br />didokahttps://www.blogger.com/profile/06887432653555202824noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-80857223346426162062017-05-08T06:01:45.877-07:002017-05-08T06:01:45.877-07:00Very good points and details regarding the wifi is...Very good points and details regarding the wifi issue. We are into laptop and <a href="http://sornavalliconserv.in" rel="nofollow">printer service </a> and blogs like these has helped us a lot in upgrading ourselves. Anonymoushttps://www.blogger.com/profile/08040498457140141114noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-51278797087173376912017-05-04T05:41:07.758-07:002017-05-04T05:41:07.758-07:00Wifi problems are very irritating. Your post regar...Wifi problems are very irritating. Your post regarding wifi problem solution is good. Keep writing on other problems of <a href="http://delllaptopservicecenterschennai.in/" rel="nofollow">laptop service</a> and desktops also. Will be happy to ready. Thanks.Shailesh Mehtahttps://www.blogger.com/profile/10020291612347757281noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-26414774555686821972017-05-02T02:51:53.711-07:002017-05-02T02:51:53.711-07:00Good post on wifi issue. Sometimes internet connec...Good post on wifi issue. Sometimes internet connection also gives trouble and we think it is the wifi of the pc which might be fault. Good blog and keep writing more on other issues also. We provide computer and <a href="http://sornavalliconserv.in" rel="nofollow">electronic name board</a> service and this post was very useful for us to upgrade ourselves.Jamuna Ranihttps://www.blogger.com/profile/08573141789030337212noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-18483806829453994812017-04-26T04:13:12.316-07:002017-04-26T04:13:12.316-07:00Good points. Was fun to read and learn this way. N...Good points. Was fun to read and learn this way. Nowadays all the laptops are with wifi and even desktops are with wifi. Thanks for sharing your input and keep writing more on other <a href="http://hpservicecenterschennai.in" rel="nofollow">laptop service</a> issues.Anonymoushttps://www.blogger.com/profile/10258427791144804369noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-31320899422014414612017-04-25T02:58:44.200-07:002017-04-25T02:58:44.200-07:00How does the STA know when to send the BA in an im...How does the STA know when to send the BA in an implicit BA scenario. I you say the last packet is the trigger, then what if the last packet is lost.<br />Thank youAnonymoushttps://www.blogger.com/profile/18223479808697605744noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-73170868757770896512017-02-17T03:02:26.588-08:002017-02-17T03:02:26.588-08:00How can one sent ADDBA request to an AP on TID0How can one sent ADDBA request to an AP on TID0Anonymoushttps://www.blogger.com/profile/17126958746134631420noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-64065419310780680092016-12-08T04:26:49.393-08:002016-12-08T04:26:49.393-08:00One reason that I can think of: All STAs may not b...One reason that I can think of: All STAs may not be able to respond to an immediate/implicit Block ACK request.<br /><br />An STA needs to perform the below operations before sending a block ACK<br />- Deaggregate the AMPDU<br />- Compute FCS for each MPDU<br />A "Soft" MAC based STA may not be able perform the above operations in time to respond to an immediate BAR.<br /><br />Note: This is my view and there could be more reasons for having two types of BAs.<br /><br />Regards,<br />SumanthSumanth Kavurihttps://www.blogger.com/profile/11033407265529189813noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-45229118565594760972016-12-07T04:19:14.328-08:002016-12-07T04:19:14.328-08:00Dear sir,
In your post, you answered" what a...Dear sir,<br /><br />In your post, you answered" what are the different types of BA. I wonder about why we need two types of BA? I hope can hear your comment. Thank you so muchAnonymoushttps://www.blogger.com/profile/01426972852025810182noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-66062681764175319722016-07-21T07:30:51.339-07:002016-07-21T07:30:51.339-07:00nice...nice...Anonymoushttps://www.blogger.com/profile/06799929605565512047noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-61986041321737551842016-01-11T17:37:40.076-08:002016-01-11T17:37:40.076-08:00great post. i may copy this article on my blog (wi...great post. i may copy this article on my blog (wirelessonthego.postach.io) and credit you..<br /><br />i am analyzing a packet capture where i see implicit BA from the AP to the client but the client qos data prior to that shows ACK policy as normal ACK Anonymoushttps://www.blogger.com/profile/08008373977679997527noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-12530061299235433622015-05-13T02:49:28.114-07:002015-05-13T02:49:28.114-07:00Thanks :-) Thanks :-) Ruwanhttps://www.blogger.com/profile/09011253370549598661noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-81711514805133667702014-12-05T05:55:36.553-08:002014-12-05T05:55:36.553-08:00Hi Sumanth,
Very good explanation. Please explain...Hi Sumanth,<br /><br />Very good explanation. Please explain the following topics too<br />1. Block Ack Req frame with significance of each field<br />2. Block Ack Response frame with significance of each field<br />3. Block Ack Req/Response VariantsSaravanan Shanmugaveluhttps://www.blogger.com/profile/16417411741177330718noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-27107154846459504342014-06-13T18:10:12.780-07:002014-06-13T18:10:12.780-07:00Thanks Krishna.
Implicit BA request is not mention...Thanks Krishna.<br />Implicit BA request is not mentioned in ADDBA. ADDBA specifies when the BlockACK would be sent: immediate or delayed and Ack Policy specifies whether a "BA Request" would be sent or not. <br />So for Implicit BA request:<br />- ADDBA : "Immediate BA" <br />- Ack Policy in data frame: "Implicit BA" <br />Sumanth Kavurihttps://www.blogger.com/profile/11033407265529189813noreply@blogger.comtag:blogger.com,1999:blog-4773314040776233134.post-61687368617680922572014-05-07T22:00:29.285-07:002014-05-07T22:00:29.285-07:00A very good and useful article Sumanth!
Some mino...A very good and useful article Sumanth! <br />Some minor comments:<br />- BA policy (can add delayed along with immediate)<br />- Also is the implicit BA also mentioned as part of the Block Ack Policy in the ADDBA?Krishnahttps://www.blogger.com/profile/03565464544091791453noreply@blogger.com