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  1. #1
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    Wifi-N only connects at 65Mbps

    I have at home an Apple Airport Express (latest Wifi-N version) acting as a wireless router which is shared by my notebook (also Wifi-N) and BDP 9600. Tested connection speed at the same distance from both my notebook and 9600. The test distance is about few feets away from the Apple Airport Express. My notebook displays a connected speed of 144Mbps which is about I come to expect for a Wifi-N connection. But 9600 only display 65Mbps. No watter what i tried and changed, the max display is 65Mbps.

    Are other people having the same problem?
    Could it be the aluminum case of 9600 shielding off radio signals?
    Could it be my 9600's Wifi-N chip crippled or faulty?
    Or it's a bug in the firmware?

    My model is 9600/98 and FW version 1.56. Thanks

  2. #2
    DerShortyy
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    hi kvic,
    i've experienced the same issue with my router and TV. In my opinion it has somehing to do with the number of devices which are connected to the router at the same time and the max bandwidth of your internet connection. the max bandwidth of 300mbit of a wifi n network has to be shared by all devices. maybe 'm wrong but this is my explanation to that issue...
    did you experienced any streaming issues (stuttering or time outs )
    best regards

  3. #3
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    hi DerShortyy
    What's the speed you see on your 9600 when you check the wireless network page in Setup?
    The speed shown on this page shall not have anything to do with your internet connection speed. It's the pure radio link speed between the wireless router and 9600. It might have to do with number of wireless clients connected to the wireless router. however, I also tried shutting down all clients except 9600, the speed shown on 9600's wireless network page is still 65Mbps.

    So I would conclude that the 9600 built-in Wifi-N chip is crippled (in my unit at least). Or the aluminium case significantly reduces the signal strength.

    cheers!

  4. #4
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    Philips - Remko's Avatar
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    Hi kvic,

    here a picture taken on our sample, with your same set-up: just one PC and the BDP9600 connected, but we used a Netgear hardware and not Apple Airport.

    There are many aspects that can affect the WiFi performance of the devices, and I would exclude a BDP technical limitation or failure.

    Regards,


    Click image for larger version. 

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    Forum Mod

  5. #5
    DerShortyy
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    Hi Kvic,

    in my opinion the TCP/IP communication between your router and your 9600 is not optimized. Of course, philips can not test the compatibility of every device which is not philips. Maybe you can try this to solve your problem: http://www.speedguide.net/downloads.php
    There must be something in the settings of your router which causes the "limitation". Regrettably, i don´t have a 9600 but i can confirm your experience with my TV. The TV also doesn´t connect with the max. range of bandwdth, but I don´t have trouble with that.

    Best regards

  6. #6
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    Hi Remko

    Thanks for the testing and screenshot. I did some more testing between my 9600 and Airport Express (AX) (802.11n version).
    With choosing different wireless options on AX.

    case 1. Wireless mode on AX = 802.11n (802.11b/g compatible)
    9600 connects at 65Mbps
    (My notebook with Intel 5300 AGN wireless-N chipset connects at 144Mbps)

    case 2. Wireless mode on AX = 802.11n (2.4GHz only)
    9600 connects at 65Mbps
    (My notebook connects at 144Mbps)

    case 3. Wireless mode on AX = 802.11n (802.11a compatible)
    9600 fails to find AX
    (My notebook also fails to find AX)

    case 4. Wireless mode on AX = 802.11n (5GHz only)
    9600 fails to find AX
    (My notebook also fails to find AX)

    My iPad2 (which shall have the latest 802.11n chipset) does connect in case #1, #2, #4. I can't remember #3 and don't bother to re-test). Since iPad2 is also Apple products...so I won't comment and take it as a reference.

    But at least we could make some comparison on case #1 and #2 between 9600 and Intel 5300 AGN.
    In both cases, 9600 connects only at 65Mbps. Originally I thought it's due to aluminum casing / assembly variety on 9600 that deteriorates the signal into/out of 9600's wireless antenna. However, you can see in my snapshot below. My 9600 has five bars when it connects at 65Mpbs. Signal quality wise, the bars on 9600 tell me I'm as good as yours connecting at 150Mbps.

    Hence, I would infer it's some compatibility issue between 9600's wireless-N chip and Apple Airport Express's wireless-N chip. Or maybe it's the firmware inside the wireless chips aren't that compatible between the two. I'm not sure which one is right or wrong as both Philips and Apple are respectable firms.

    Click image for larger version. 

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    hi DerShortyy
    I know those stuff and believe me I would probably know more than the guide you quoted. As I mentioned in my original response, the speed you see on 9600 is at "radio link layer" which is way below the optimization you could do in the upper layers of the protocol stack. But thanks for your link and response.

    cheers

  7. #7
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    Hi kvic,

    can you use a sw like "NetStumbler" to check how many WLAN transmit on your same CH 11? Maybe switch to another channel can improve your WiFi reception.

    Andrea

  8. #8
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    Hi Kiro

    thanks for your suggestion. I used a program named Xirrus Wi-Fi Inspector. And then based the survey, I picked channel 11 because it's used least, virtually none around me. Most people are taught to avoid 11 by optimization guides as 11 comes to be default in my region. Also checked not much adjacent channels. Not much overlap.

    I tried getting 9600 to establish an ad hoc network with my HP notebook (intel 5300 AGN wireless chipset).
    9600 is not capable of joining ad hoc network which makes sense and it's fine.

    Unfortunately I don't have another Wifi-N router to try

    cheers

  9. #9
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    Hi,

    I did more research on this topic. Here are my inferred conclusions.

    1. My HP notebook (a 2008 model) although comes with Intel Wifi Link 5300 AGN which supports both 2.4Ghz or 5Ghz 802.11n. But I think HP was slacking and never implemented 5Ghz support at the system level.

    2. Same is true for Philips 9600. The on-board Wifi-N chipset only supports 2.4GHz 802.11n (please prove me wrong). This still allows the product to pass the baseline/minimum Wifi-N certification though.

    3. With my Apple Airport Express, BDP 9600 gets 65Mbps and my HP notebook gets 144Mbps. Philips test engineer gets 150Mbps with his Dlink router. What do all these tell?

    (a) BDP 9600 on-board Wifi-N chipset *only* supports/operates at *one* spatial stream mode.
    Read the "Data Rate" table on http://en.wikipedia.org/wiki/IEEE_802.11n-2009. In particular, this line

    7 1 64-QAM 5/6 65.00 72.20 135.00 150.00

    You will see what I mean, assuming 9600's display is correct.

    (b) The reason Philips engineer gets 150Mbps because his Netgear router supports fat channel (40MHz) at 2.4GHz 802.11n even only with one spatial stream.

    I kind of conclude there is either a firmware issue on the 9600 Wifi-N chipset or 9600 comes with the cheapest chipset that barely passes Wifi-N certification. If the latter, pretty sad in a flagship product like 9600.

    Could Philips check and explain how many "spatial streams" does the 9600 onboard 802.11n chipset support please?

    thanks
    Last edited by kvic; 09-24-2011 at 07:05 AM.

  10. #10
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    Hi,

    I bought it last weekend and asked for some info in the specialised shop. They said it is Wi-Fi n certified and it is certified based on the performance requirements for a 1x1 Wi-Fi module.

    I have it connected now at the moment and have 150Mbps connection also and all goes good. As far as my knowledge goes ( not far ) is that 150Mbps is can be achieved via channel bonding (40Mhz channels). Some routers support channel bonding, and not all. In channel bonding the throughput may also not reach 150Mbps depending on the network conditions.

    Bye

  11. #11
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    Philips,

    Is 9600's onboard 802.11n chip 2x2:2, meaning two receive antenna, two transmit antenna?

    thanks

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