Design And Implementation Of The Controlling Plane Platform Under TD-LTE Broadband Wireless Trunking

TD-LTE Broadband wireless multimedia trunking system combines TD-LTE technology with trunking communication.This paper focuses on the S1 interface between MME and eNB of Broadband wireless multimedia trunking system.The S1 interface is in charge of the transporting of signal between MME and eNB.Chapter 1 gives introduction of the development of TD-LTE,the backgrounds of trunking communication system.Also,it describes the author's work and the structure of this paper.Chapter 2 introduces the structure of TD-LTE Broadband wireless multimedia trunking system based on chapter 1,gives clear analysis of the controlling plane.This chapter also gives inclusion of the design of papers and openair codes,in the end of this chapter a possible solution of S1 design is given.Chapter 3 and 4 describe the designation and realization of the S1 AP.In chapter 3,the requirement analysis was given,and a series of functions,such as the S1 management,the transport of NAS,the context management,the UE capability indication and intertask interface,were designed.Chapter 4 gives the realization of the function based on Chapter 3.It's divided into two part.One is for the eNB and the other is for the MME.The flowcharts are given according to the different parts of functions.Chapter 5 tests the realization the S1 interface,including unit test and integration test.Unit test makes sure of the each function part's correctness while the integration test makes sure of the whole system's functioning well.The last chapter summarizes the paper and guides the further development of the unrealized function.