Design And Implementation Of The Low-Layer Driver And U-Interface Protocol Stack In LTE Network

As the latest communication technology standards, Long Term Evolution(LTE) promotes wireless communication rate dramatically by adoptingmultiple new mobile communication technologies. Compared to3Gstandards, it adopts a smooth update style in network architecture, whichsaves investment. These two aspects make LTE technology morecompetitive in the area of mobile communication in the future. Althoughit is still in the pilot phase and is led by several main large-scalecommunication manufactures, LTE, with the features of high bandwidthand mobility, must be adopted by small wireless communication systems.However, standard LTE air interface seems too bulky and complexwhile dealing with the applications from small wireless communicationsystems. In order to adapt LTE air interface to small wirelesscommunication systems, this paper adopts one implementationmechanism based on multi buffer queues through the deep analysis of airinterface combined with the practical project requirements anddevelopment platform. First, this article elaborates the methods and stepsof developing LTE link low-layer driver on Xilinx platform. Then, extended from the architecture of the LTE air interface, the functions ofPacket Data Convergence Protocol (PDCP), Radio Link Control (RLC)and Media Access Control (MAC) sub-layers of LTE protocol aretop-down designed and explained respectively. Moreover, the datastructure, data processing flow used by every sub-layer while realizingthe above functions, and every sub-layer’s module function are alsoinvolved. At last, through the test from the top software, the air interfacefrom this paper can satisfy the requirements of current systems in theaspect of data processing rate.