Tengo un problema muy extraño que está causando problemas para reproducir vídeos a través de una red inalámbrica-n. Reproducción de los vídeos hace que la red caiga después de un corto período de tiempo. A veces esto sólo tiene una duración de 2-3 segundos, que acaba provoca un tartamudeo de vídeo. Otras veces, el abandono es más permanente y toma cerca de un minuto para recuperar, a no ser que la radio inalámbrica está apagado y de nuevo en, -ción recon-nec con lo cual se produce.
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. También he probado con un procesador Intel 6300 Wireless card.
Hasta ahora he probado y establecido los siguientes hechos (nota: all speeds are given in bits not bytes)...
1. The direction of the file transfer doesn’t matter, que puede ser para el cli-ent o del cli-ent (e.g. de A a C o de C a A). También puede ser ini-ti-ated por el cli-ent, or by the other end of the transfer (es decir. ini-ti-lización creada por las C). 2. La transferencia de archivos puede ser a un equipo diferente de la fuente de vídeo, o la misma, siempre tiene el mismo efecto "protector". (es decir. es un archivo de C a A ing stream-, copia de archivos es de B a A)
3. Play-ción sólo 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. Aumentando el buf-fer en WMP a 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. El router del firmware está actualizado al día, 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. Cuando la conexión se corta se corta todos los clientes inalámbricos, incluso aquellos que no están involucrados en la transmisión de lo que el tema * parece * probabilidades de estar en el extremo del router de la conexión, no el final cli-ent? (es decir. cuando stream-ing de C a A, B también se corta temporalmente)9. A web-download at ~300k/sec (2.4Mbps) doesn’t offer the same protective effect as the ~70Mbps file transfer.
10. El problema se produce incluso si el cli-ent (un ordenador portátil) is on battery or plugged in. So it seems unlikely to be power-management related?
11. Disabled IPv6 without any benefit
12. Vídeo ing stream-Trató de ambos Win-dows 2003 (server C) y Win-dows 7 (escritorio D) hosts sin cambio, así que problema no está relacionado con SMB 2.0
13. Intentado reproducción con una variedad de actores, incluyendo Media Center 7, Windows Media Player 12 x64, Windows Media Player 12 x86, MPC-HC x64 y VLC — all exhibit the problem
14. Mejoras-ción a un Intel 6300 wireless card makes no difference
15. The distance from router makes no difference
16. El problema ocurre más rápido cuanto más intenso es el tráfico
17. The problem happens significantly less with a shorter wireless key
Mi mejor teoría es que el router tiene un problema oscuro donde se está reduciendo la velocidad inalámbrica cuando se detecta que la conexión es con un uso bajo, 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.
Luego me gustaría probar uno de los ordenadores portátiles con Windows XP como el LA en lugar de 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 o router en el momento.
If anyone has any other ideas for things to try/test, or has a similar problem please get in touch!
Actualizar 1 (5/Jan-2011)
Yo no soy la única persona que experimenta este. Googling shows up a range of other people who have had similar issues but as yet no solutions. List of links below…
Actualizar 2 (23-Marzo-2011)
He actualizado partes vari-ous del puesto, y añadió una serie de enlaces a continuación.
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, o con los ordenadores portátiles de Dell Stu-DIO!
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 - Hay gente que dice-ción de sus tarjetas de Intel, 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, pero aún con un problema resuelto Unre-, por lo que no es muy útil
https://forums.smallnetbuilder.com/showthread.php?t=1997&page=3 — Similar sounding problem with a Belkin router. Problem resolved by replacing router.
Actualizar 3 (30-Mayo-2011)
He probado el portátil con-nec-ted a 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.
Si usted es pensar-ción de-tren un Draytek, consider an alternative. I can recommend the Netgear DGND3700
“Hi James I realise it has been a long while, but I just checked this on windows 11 (build 23H2)…”