Wireless network communication apparatus

Abstract

The present invention provides a wireless network communication device, including at least one upper-layer automatic request for retransmission entity, wherein the automatic request for retransmission entity in acknowledgment mode has a sending part and a receiving part: the sending part includes: a split cascading unit for The data unit is divided and cascaded; the retransmission buffer unit is used to cache the divided and concatenated protocol data unit, and the cached protocol data unit is processed; the receiving part includes: a rearrangement unit for receiving The protocol data units are sorted; the reorganization unit reorganizes the sorted protocol data units, and submits them to the high-level after forming service data units; wherein, the splitting and cascading of the data units includes: inputting the splitting and cascading units The retransmitted PDUs are divided and concatenated again, and corresponding data header information is added. It is used for the new outer ARQ entity architecture proposed for the EUTRAN system, providing functions that cannot be supported by the R6 protocol architecture, and improving system performance.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to the optimization of the physical architecture of the radio link layer (RLC) in the acknowledged mode (AM) and the unacknowledged mode (UM) in the base station of the evolved universal terrestrial radio access network, specifically A wireless network communication device. Background technique [0002] From the perspective of the evolution of the wideband CDMA (WCMDA) system, in the early 1990s, some communication companies and research organizations in Europe started research on WCDMA. From 1998 to now, the technical specifications of the WCDMA system have gone through Specification (Release) 99, Release 4, Release 5, and Release 6 are several stages, and the standardization work on Release 7 has already begun to be implemented. At the same time, the longer-term LTE (Long Term Evolution) research has gradually become a new focus of standardization work. [0...

AI Technical Summary

Problems solved by technology

[0033] To sum up, the shortcomings of the existing technology are: the RLC layer in R6 is located in the radio network control (RNC), the sending end of the RLC UM entity and AM entity supports split concatenation based on equal-sized PDUs, and the receiving end supports SDU orderly Submission and out-of-order delivery, and the UM and AM entities of RLC are established according to the business

In the EUTRAN system, the RNC is canceled, and the RLC layer is moved down to the base station. It can be used as a separate layer, or it can be combined with the MAC layer to form the MAC+ layer. In this way, in order to better utilize the transmission efficiency of the air interface and reduce filling, split cascading can Based on the flexible PDU size; and the access network architecture of the EUTRAN system is an all-IP architecture, and the PDCP layer is located at the access gateway (aGW). In this way, only by receiving data in the order in which the data packets are sent by the PDCP layer can the errors in decompression be reduced. However, the orderly delivery of SDUs at the RLC layer cannot guarantee the orderly reception of the PDCP layer.

In summary, the RLC layer AM and UM entity characteristics of the R6 protocol can no longer meet the requirements of the EUTRAN system

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