(Department of Communication and Information Systems,Chongqing University of Post and Telecommunications,Chongqing 400065,China)
Abstract: the paper introduces the reasons for handover,the classification of handover failures,and the related main signalingprocess. The paper also presents a method to optimize the process of handover, designs handover signaling flow on the side of UE, and uses TTCN as simulation tools, considering the RRC layer as the simulation object and the other layers as simulation environment to simulate handover process.
Keywords:TD_LTE;Handover;Handover too early;Handover too late;Ping-pong handover
Reference：
[1]3GPP TS 36.331, Evolved Universal Terrestrial Radio Access (E-UTRA); Radio Resource Control (RRC) protocol specification, v9.0.0(2009-09).
[2]3GPP TS 36.300,Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description, v9.0.0(2009-06) .
[3]3GPP TS 23.401,General Packet Radio Service (GPRS) enhancements for Evolved Universal Terrestrial Radio Access Network (E-UTRAN) access, V11.3.0 (2012-09)
[4]Zhao,X,W.&H,Lin.&M,Zhang.&Y,H,jiang.&P,Zhang.&R,Yue.&G,R,Li.3GPP Long Term Evolution:Architecture and Specification.BeiJing:posts & telecom press,2010:336-340.
[5]Shen,J.&S,Q,Suo.&H,Y,Quan.&X,W,Zhao.&H,J,Hu.&Y,H,Jiang.3GPP Long Term Evolution:Principle and System Design,BeiJing:posts & telecom press,2008.
[Author]:
Shao Ming Miao:(1987 -), female, graduate students, research direction : LTE RRC protocolexploitation.
