0Entschlossen: Wireless-Video-Streaming-Problem

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, which just causes a video stut­ter. Oth­er times the drop out is more per­man­ent and takes nearly a minute to recov­er, es sei denn, die drahtlose Funk ausgeschaltet und wieder auf, worauf recon-ang-tion erfolgt.

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.

Die ich bisher getestet und etabliert die folgenden Fakten (Anmerkung: all speeds are giv­en in bits not bytes)…

1. The dir­ec­tion of the file trans­fer does­n’t mat­ter, es kann auf die Client-oder von der Client-sein (e.g. von A bis C oder von C nach A).  Es kann auch ini-ti-ATED von der Client-sein, or by the oth­er end of the trans­fer (d.h. ini-ti-ATED von C).
2. Die Dateiübertragung kann auf einem anderen Computer als der Quelle des Videos sein, oder dieselbe, Es hat immer die gleiche "schützende" Wirkung. (d.h. Datei Streaming-von C nach A, Datei-Kopie ist von B nach A)
3. Spiele-ten nur 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. Zunehmende die Puffer-in WMP nach 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. Der Router-Firmware ist up-to-date, 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. Wenn die Verbindung unterbricht sie schneidet alle Wireless-Clients, auch diejenigen, die nicht in der Streaming beteiligt, so dass die Ausgabe * scheint * wahrscheinlich am Router Ende der Verbindung werden, nicht das Client-Ende? (d.h. wenn-ten Strom von C zu A, B is also cut off temporarily)
9. A web-down­load at ~300k/sec (2.4Mbps) does­n’t offer the same pro­tect­ive effect as the ~70Mbps file transfer.
10. Das Problem tritt auf, auch wenn der Client- (ein Laptop) is on bat­tery or plugged in. So it seems unlikely to be power-man­age­ment related?
11. Dis­abled IPv6 without any benefit
12. Versucht Streaming-Video von sowohl Windows- 2003 (serv­er C) und Windows 7 (Desktop-D) Hosts ohne Änderung, so Problem ist nicht auf SMB bezogenen 2.0
13. Versucht die Wiedergabe mit einer Vielzahl von Spielern wie Media Center 7, Win­dows Media Play­er 12 x64, Win­dows Media Play­er 12 x86, MPC-HC x64 und VLC — all exhib­it the problem
14. Upgrad-ten zu einem Intel 6300 wire­less card makes no difference
15. The dis­tance from router makes no difference
16. Das Problem tritt schneller je intensiver der Verkehr
17. The prob­lem hap­pens sig­ni­fic­antly less with a short­er wire­less key

Meine beste Theorie ist, dass der Router über eine obskure Angelegenheit, wo es reduziert Wireless Geschwindigkeit, wenn es erkennt, dass die Verbindung unter geringer Nutzung, 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.

Weiter möchte ich einen der Laptops mit Windows XP als zu versuchen die OS statt Win7, 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 oder Router im Moment.

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

Aktualisierung 1 (5/Jan-2011)

Ich bin nicht der einzige, bei denen dieses. Googling shows up a range of oth­er people who have had sim­il­ar issues but as yet no solu­tions. List of links below…

Aktualisierung 2 (23-März 2011)

Ich habe ver-schiedenen Teilen der Beitrag aktualisiert, und hat eine Reihe von Links unten.

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, oder mit Dell Stu-dio-Laptops!

https://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

https://forums.whirlpool.net.au/archive/1300843 - Manche Leute sagen, seine Intel-ten Karten, but oth­ers say­ing chan­ging card did­n’t help. Noth­ing conclusive.

https://forums.lenovo.com/t5/W‑Series-ThinkPad-Laptops/INTEL-5100–5300-Network-Dropouts-Disconnects/m‑p/97708 — Anoth­er spec­u­lat­ing about Intel drivers, aber immer noch mit einem ungelösten Problem, so nicht sehr hilfreich

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

Aktualisierung 3 (30-Mai-2011)

Ich habe den Laptop-con-ang-ten getestet 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.

Wenn Sie denken,-ing von get-ting ein Draytek sind, con­sider an altern­at­ive. I can recom­mend the Net­gear DGND3700