×

Discussion Board

Results 1 to 11 of 11
  1. #1
    Regular Contributor
    Join Date
    Mar 2003
    Posts
    50

    GPRS connection problems on 6600..

    I have coded a program for Series 60 (Nokia 6600), which uses both TCP and UDP sockets to communicate with the server. TCP is used for controling the session and UDP for transferring RTP data to the server. The program basically works fine, but there are couple of problems..

    1)
    If GPRS connection breaks during the session, a new TCP connection cannot be established without rebooting the phone. Not even if I close all GPRS connections from my own program or from the connection manager. After the connection breaks, I cannot anymore connect to any server even if I close my software and use some other software (e.g. WAP browser) with other access points. Has anyone noticed similar behaviour or is there any known solutions to reset the GPRS connection totally without rebooting the phone?

    2)
    If I send very small UDP packets (<100B bytes), sending bit rate drops dramatically. I know that the packet overhead increases when using smaller packets but that is not the reason. It seems that RSocket::SendTo() call takes too long to finish and thus I cannot send as much packets I would like to. What is the best way to send continuous stream of very small UDP packets as quick as possible? Currently I can send only around 10-15 packets per second, no matter how small packets I send. If I comment out the line with RSocket::SendTo() call and the following User::WaitForRequest() call, the code runs several thousand times per second. I have already tried to change the thread's priority and the socket's sending buffer size without results.

    If someone has solutions to these problems or have noticed similar behaviour, please let me know..

  2. #2
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    Re: GPRS connection problems on 6600..

    Have you Resolved the second problem? How to resolve it?
    Now I encountered the same problem: If i send many rtp packets, the socket server
    will not send the rtp packet util waitting for six sencond.

  3. #3
    Regular Contributor
    Join Date
    Sep 2004
    Posts
    90

    Re: GPRS connection problems on 6600..

    1) We had similiar problems. After firmware update for 6600 it's gone.

    Tobias

  4. #4
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    Re: GPRS connection problems on 6600..

    hello, Tobias ,thanks!
    Would you tell me how to update the fireware of the nokia 6600?

  5. #5
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    Re: GPRS connection problems on 6600..

    Quote Originally Posted by tobias_stoeger
    1) We had similiar problems. After firmware update for 6600 it's gone.

    Tobias
    Have you similar problems for the first question?or for both questions?

  6. #6
    Regular Contributor
    Join Date
    Sep 2004
    Posts
    90

    Re: GPRS connection problems on 6600..

    You have to bring your device to a nokia service center/shop and ask for latest firmware.

  7. #7
    Regular Contributor
    Join Date
    Sep 2004
    Posts
    90

    Re: GPRS connection problems on 6600..

    -> "1)"
    first q

  8. #8
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    Re: GPRS connection problems on 6600..

    Quote Originally Posted by tobias_stoeger
    You have to bring your device to a nokia service center/shop and ask for latest firmware.
    1)Have you encountered the same problem: If i send many rtp packets, the socket server
    will not send the rtp packet util waitting for six sencond.

    2)the latest fireware update the socket server problem?

  9. #9
    Regular Contributor
    Join Date
    Sep 2004
    Posts
    90

    Re: GPRS connection problems on 6600..

    my answer is only related to topic 1)

  10. #10
    Registered User
    Join Date
    Oct 2005
    Posts
    16

    Re: GPRS connection problems on 6600..

    Could you tell me how to resolve the problem?thanks
    Problem: Nokia 6600 Socket Server Problem
    Desciption: In Gprs, encoding using AMR515, send a packet every 200ms, every packet less than 250 bytes.
    when we send rtp packets in 100 seconds using UDP, we find there
    are 6-7 senconds interval that the socket server send noting.And the server didn't receive any
    packet, but the rtp packets did't lose. we can find this problem usually.
    Question: How to reduce the 6-7 senconds delay?

    this is the client and the sever log recoder:
    1.No.+ number: packet seqence

    2.Send Data From Queue: from the buffer send data

    3.RunL: iStatus。

    4.Cancel Write。

    5.DoCancel: call DoCancel() function

    6.every send exprired time:300ms,resend times: 0



    //client log

    No.608Send RTP Data: 17:5:28:500000
    Send Data From Queue: 17:5:28:531250
    No.609Send RTP Data: 17:5:28:671875
    No.610Send RTP Data: 17:5:28:796875
    RunL: 17:5:28:843750TimeOut = 400 No.608Send RTP Data: 17:5:28:50
    Send Data From Queue: 17:5:28:859375
    RunL: 17:5:28:890625TimeOut = 130 No.609Send RTP Data: 17:5:28:67
    Send Data >From Queue: 17:5:28:921875
    RunL: 17:5:28:937500TimeOut = 115 No.610Send RTP Data: 17:5:28:79
    No.611Send RTP Data: 17:5:29:62500
    Send Data From Queue: 17:5:29:93750
    No.612Send RTP Data: 17:5:29:171875
    No.613Send RTP Data: 17:5:29:234375
    RunL: 17:5:29:265625TimeOut = 265 No.611Send RTP Data: 17:5:29:62
    Send Data From Queue: 17:5:29:296875
    RunL: 17:5:29:328125TimeOut = 130 No.612Send RTP Data: 17:5:29:17
    Send Data >From Queue: 17:5:29:343750
    RunL: 17:5:29:390625TimeOut = 145 No.613Send RTP Data: 17:5:29:23
    No.614Send RTP Data: 17:5:29:734375
    Send Data From Queue: 17:5:29:812500
    No.615Send RTP Data: 17:5:29:968750
    No.616Send RTP Data: 17:5:30:140625
    Cancel Write
    DoCancel
    Send Data From Queue: 17:5:30:343750
    No.617Send RTP Data: 17:5:30:500000
    No.618Send RTP Data: 17:5:30:656250
    No.619Send RTP Data: 17:5:30:812500
    Cancel Write
    DoCancel
    Send Data From Queue: 17:5:30:984375
    No.620Send RTP Data: 17:5:31:156250
    No.621Send RTP Data: 17:5:31:281250
    No.622Send RTP Data: 17:5:31:437500
    Cancel Write
    DoCancel
    Send Data From Queue: 17:5:31:562500
    RunL: 17:5:31:609375TimeOut = 145 No.617Send RTP Data: 17:5:30:50
    Send Data From Queue: 17:5:31:640625
    No.623Send RTP Data: 17:5:31:765625
    No.624Send RTP Data: 17:5:31:906250
    No.625Send RTP Data: 17:5:32:15625
    Cancel Write
    DoCancel
    Send Data From Queue: 17:5:32:109375
    RunL: 17:5:32:140625TimeOut = 130 No.619Send RTP Data: 17:5:30:81
    Send Data From Queue: 17:5:32:171875
    RunL: 17:5:32:203125TimeOut = 130 No.620Send RTP Data: 17:5:31:15
    Send Data >From Queue: 17:5:32:218750
    RunL: 17:5:32:265625TimeOut = 145 No.621Send RTP Data: 17:5:31:28
    Send Data From Queue: 17:5:32:281250
    RunL: 17:5:32:328125TimeOut = 145 No.622Send RTP Data: 17:5:31:43



    //Server log

    17:05:58:392 235 No.608Send RTP Data: 17:5:28:500000

    17:05:58:529 235 No.609Send RTP Data: 17:5:28:671875

    17:05:58:690 235 No.610Send RTP Data: 17:5:28:796875

    17:05:59:090 235 No.612Send RTP Data: 17:5:29:171875

    17:05:59:269 235 No.613Send RTP Data: 17:5:29:234375

    17:05:59:471 235 No.614Send RTP Data: 17:5:29:734375

    17:05:59:657 235 No.615Send RTP Data: 17:5:29:968750

    17:05:59:830 235 No.616Send RTP Data: 17:5:30:140625

    17:06:06:141 235 No.617Send RTP Data: 17:5:30:500000

    17:06:06:320 235 No.618Send RTP Data: 17:5:30:656250

    17:06:06:522 235 No.619Send RTP Data: 17:5:30:812500

    17:06:06:719 235 No.620Send RTP Data: 17:5:31:156250

    17:06:06:903 235 No.621Send RTP Data: 17:5:31:281250


    from the above we can see from 17:05:59 to 17:06:06 the client send nothing to the sever

    how to resolve it? how to make the 6-7s interval to 2-3s interval ?
    thanks

  11. #11
    Registered User
    Join Date
    Dec 2005
    Posts
    10

    Wink Re: GPRS connection problems on 6600..

    I have a similar problem on a 7610:
    only 10 to 15 UDP packets per second are sent, and it delays audio capturing too.
    The funny thing is that sometimes when I leave the application running for a few minutes, suddenly the speed increases and the audio is streamed (almost) perfectly!
    However, the application will stop sending UDP completely after some time, while it still thinks it's sending UDP. The SocketServer must be broken in that time or something, because I need to restart the phone completely for any UDP to be sent afterwards.

    Anybody any ideas?

    The way I'm streaming is very simple (in pseudo code):

    MaiscBufferCopied()
    {
    if (aBuffer.Length() == 640)
    {
    if (&aBuffer == iDualBuffer[1])
    iBufferInUse = 0;
    else
    iBufferInUse = 1;
    }
    iInputStream->ReadL(*iDualBuffer[iBufferInUse]);

    if (iBufferInUse == 0)
    SendAudio(*iDualBuffer[1]); // this function creates an RTP packet and sends it over UDP
    else
    SendAudio(*iDualBuffer[0]);

    }


    SendAudio()
    {
    //Convert PCM to GSM with codec

    RTPPacket rtpPacket = new RTPPacket(........)

    iSocket.SendTo(.....)
    User::WaitForRequest(....)

    }

    Grtzz
    Paul.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •