0无线WiFi 802.11 ABGN标志已解决: 无线视频流的问题

I have a very strange issue which is caus­ing prob­lems play­ing videos over a wireless‑n net­work. Play­ing the videos causes the net­work to drop out after a short peri­od. Some­times this only lasts for 2–3 seconds, 这只是导致视频口吃。其他时候,辍学是更持久,并需要将近一分钟恢复, 除非无线电台被关闭并重新打开, 于是重建NEC tion发生.

Run­ning a con­tinu­ous ping dur­ing this res­ults in timeouts when the con­nec­tion drops. The con­nec­tion is more likely to recov­er with­in 2–3 seconds if the video is paused as soon as the prob­lem occurs. Now the strange part. If I sim­ul­tan­eously copy a large file over the wire­less at the same time as play­ing the video then play­back is fine and no drop outs occur! This is affect­ing a wire­less con­nec­tion between a Draytek Vigor2820Vn and 2 dif­fer­ent laptops with Intel 5×00 wire­less cards. Both laptops are run­ning Win­dows 7 x64. I have also tried with an Intel 6300 Wire­less card.

我迄今已检测并建立了以下的事实 (注: all speeds are giv­en in bits not bytes)…

Wireless Network Draytek Vigor2820Vn Problems Network Layout

1. The dir­ec­tion of the file trans­fer does­n’t mat­ter, 它可以为CLI-ENT或在CLI-ENT (e.g. 从A至C或从C至A).  它也可以是INI-TI-ated由CLI-ENT, or by the oth­er end of the trans­fer (即. INI-TI-ated由Ç).
2. 文件传输可以在不同的计算机从视频源, 或同一, 它总是具有相同的“保护”作用. (即. 文件是流ing从C至A, 文件复制从B到A)
3. 播放后只 1 video with a bitrate of 2Mbps does­n’t seem to exhib­it the issue? 2 Videos with a total of 4Mbps do suf­fer. Videos up to and includ­ing 13Mbps all exhib­it the same issue. High­er rates haven’t been tested but I expect them to have the same problem.
4. There are no oth­er nearby wire­less net­works effect­ing net­work per­form­ance, and file trans­fers work reli­ably at approx 70Mbps so the con­nec­tion is not band­width limited.
5. 升高同时缓冲区中 WMP to 30 seconds has no bene­fit. Fur­ther­more the jud­ders in video play­back still occur at the same time as the ping timeouts so the buf­fer does­n’t even seem to be working?
6. 路由器的固件是最新最新, and it has had the wire­less board replaced without resolv­ing the prob­lem. The issue also occurred with older firmware.
7. The drivers for the wire­less cards are up to date. The issue also occurred the same with older drivers.
8. 当连接切断它切断所有的无线客户端, 即使是那些没有参与这样流的问题*似乎*可能是在连接在路由器端, 不是CLI-ENT结束? (即. 当流ing从C至A, B is also cut off temporarily)
9. A web-down­load at ~300k/sec (2.4Mbps的) does­n’t offer the same pro­tect­ive effect as the ~70Mbps file transfer.
10. 出现该问题,甚至如果CLI-ENT (一台笔记本电脑) is on bat­tery or plugged in. So it seems unlikely to be power-man­age­ment related?
11. Dis­abled IPv6 without any benefit
12. 从双方双赢DOWS试过流时的视频 2003 (serv­er C) 和Win-DOWS 7 (桌上电脑□) 不改变主机, 那么问题出不相关的SMB 2.0
13. 尝试播放与多种播放器,包括媒体中心 7, Win­dows Media Play­er 12 x64的, Win­dows Media Play­er 12 86, MPC-HC x64的VLC — all exhib­it the problem
14. Upgrad-ing到英特尔 6300 wire­less card makes no difference
15. The dis­tance from router makes no difference
16. 该问题发生的速度更快更强烈的交通
17. The prob­lem hap­pens sig­ni­fic­antly less with a short­er wire­less key

我最好的理论是,路由器有一个不起眼的问题,即它是减少无线速度在检测到连接在低用量时,, but this low speed state isn’t suf­fi­cient for the peaks of required band­width in vari­able bit rate video streams and goes into some kind of error state which is only relieved when the video play­back is hal­ted. Copy­ing a file is suf­fi­ciently intens­ive to pre­vent this state being entered, but a web-down­load isn’t.

接下来,我想尝试使用Windows XP的笔记本电脑之一为 THE 而不是Win7的, altho I don’t expect this to help. Then I’d like to try a dif­fer­ent router / wireless‑n WAP which if my the­ory is cor­rect will cure the prob­lem. Sadly I don’t have a source of a wireless‑n WAP 或路由器的时刻.

If any­one has any oth­er ideas for things to try/test, or has a sim­il­ar prob­lem please get in touch!

更新资料 1 (5/一月-2011)

我不是唯一的人遇到此. Googling shows up a range of oth­er people who have had sim­il­ar issues but as yet no solu­tions. List of links below…

更新资料 2 (23-三月 - 2011)

我已经更新的帖子变量项配件, 并增加了一系列的下方链接.

I’m at a point now where I need to test my laptop with a dif­fer­ent Wireless‑N net­work. If it works then I think I can con­clude there is a prob­lem with my router. If it does­n’t work then there is some­thing wrong with either Intel wire­less cards, 或与戴尔斯图-DIO笔记本电脑!

http://www.sevenforums.com/network-sharing/110061-windows-7-wireless-connections-drop-out.html — Sound sim­il­ar, but not quite the same. My adaptor still sees wire­less net­works as far as I can tell

HTTP://forums.whirlpool.net.au/archive/1300843 - 有人说,ING的英特尔卡, but oth­ers say­ing chan­ging card did­n’t help. Noth­ing conclusive.

HTTP://forums.lenovo.com/t5/W‑Series-ThinkPad-Laptops/INTEL-5100–5300-Network-Dropouts-Disconnects/m‑p/97708 — Anoth­er spec­u­lat­ing about Intel drivers, 但仍然有一个未解决的问题, 所以不是非常有帮助

http://forums.smallnetbuilder.com/showthread.php?t=1997&page=3 — Sim­il­ar sound­ing prob­lem with a Belkin router. Prob­lem resolved by repla­cing router.

更新资料 3 (30-五月-2011)

我测试过的笔记本电脑CON-NEC,ted到 2 more wireless‑n net­works. It works without any issue. In con­clu­sion there is either a fault with the draytek or there is an incom­pat­ib­il­ity. Hav­ing already sent the draytek back once before I am rather dis­ap­poin­ted that draytek failed to resolve the issue.

如果你认为,ING的get婷的居易, con­sider an altern­at­ive. I can recom­mend the Net­gear DGND3700

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