Method and apparatus for transmitting and receiving packet data using predefined length indicant in mobile communication system

Method and apparatus for transmitting and receiving packet data using predefined length indicant in mobile communication system

  • CN 101,171,806 B
  • Filed: 05/04/2006
  • Issued: 06/13/2012
  • Est. Priority Date: 05/04/2005
  • Status: Active Grant
First Claim
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1. method that in GSM, transmits data comprises:

  • Receive service data unit SDU from higher level, and determine whether and can SDU be included among the protocol Data Unit PDU;

    Structure comprises the PDU of head and data field, if wherein SDU can be included among the PDU, then this head comprises that sequence number SN field and indication PDU do not have whole be included in the data field of SDU a bit field of segmentation, splicing or filling;

    If SDU can not be comprised among the PDU, then be segmented into a plurality of fragments according to the big young pathbreaker SDU of PDU that can transmit;

    Make up a plurality of PDU;

    The data field of each PDU comprises a fragment of these a plurality of fragments;

    The head of each PDU this bit field and this at least one LI field of comprising this SN field, indicating at least one length indicator LI field to exist wherein;

    Wherein, if the data field of this PDU comprises the intermediate segment of this SDU, then this LI field is set to indicate this PDU to comprise this intermediate segment but first fragment that neither comprises this SDU does not comprise the predefined value of last fragment yet;

    AndPDU is sent to receiver.

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