Method and device for processing packets by packet data convergence protocol (PDCP) layer
A technology for converging protocols and packet data, applied in the field of network communication, it can solve the problems of RX_HFN losing synchronization, the receiving end cannot correctly decrypt the data, and the data transmission cannot be carried out smoothly, so as to ensure the smooth progress and maintain the effect of synchronization.
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[0019] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] The method provided by the present invention mainly includes: after the PDCP layer of the receiving end receives the PDU, it compares the sequence number of the PDU with the value of the state variable Next_PDCP_RX_SN, and determines whether the received PDU is a normal data packet or an out-of-sequence data packet according to the comparison result; If it is an out-of-sequence data packet, keep RX_HFN unchanged; if it is a normal data packet, further determine whether the sequence number of the received PDU is inverted, if it is, add 1 to the value of RX_HFN; otherwise keep the value of RX_HFN constant.
[0021] The method of the present invention can be based on the current PDCP specification, start to execute the method provided by the pre...
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