Method for generating AM (Amplitude Modulation) PDU (Protocol Data Unit) fragments under LTE (Line Termination Equipment) RLC (Radio Link Control) AM mode

Abstract

The invention discloses a method for generating AM (Amplitude Modulation) PDU (Protocol Data Unit) fragments under an LTE (Line Termination Equipment) RLC (Radio Link Control) AM mode. The processing method does not use a traditional way of needing to re-perform data assembly and refill the control information of a head part when the AM PDC fragment is constructed, and the whole AM PDU as data is directly assembled and sent fragmentally. Therefore, the way makes the best of using the transmission reliability of the RLC AM; meanwhile, the transmission and receiving processes of the AM PDU fragments under the AM mode can be greatly simplified, thereby being more convenient to systematically realize the generating method.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for generating AM PDU fragments in an LTE RLC AM mode. Background technique [0002] In the RLC AM mode of LTE, the RLC layer ensures the reliability of AM PDU transmission through the feedback mechanism: that is, the sender needs to save the data packet until the receiver does not confirm receipt of an AM PDU. AM PDU, the sender needs to resend. Since the size of the data that can be sent by the RLC is limited by the allocation authorization of the MAC, it is possible to retransmit the data packet in fragments. [0003] In RLC AM mode, there are three data packet types: AM PDU, AM PDU fragmentation and status PDU, wherein the sender sends AM PDU and AM PDU fragmentation, which all belong to data PDU; and the receiver sends status PDU to The reception status of the data PDU is fed back to the sender. The AM PDU is used for the first transmission and the...

AI Technical Summary

Problems solved by technology

[0014] 1. For each AM PDU fragment, the sender of the RLC entity must re-fill the FI and E in the AM PDU fixed header, and the E and E in the extended header according to the specific conditions of the SDU included in the AM PDU fragment. LI, high computational complexity;

[0015] 2. This processing method does not take advantage of the transmission reliability of RLC itself in AM mode;

[0017] 4. When the receiving end of the RLC entity merges AM PDU fragments, if there is data duplication, superposition, etc., in addition to considering SO processing, it also needs to additionally merge or split E and LI, and the processing details Many, high computational complexity

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