Methods Researchment Of Digital Trunking Radio On Voice Handover

Digital Trunking Walkie Talkie is a wireless terminal device based on digital trunk protocol.It is one of the important communication methods in professional wireless communication field.It has the unique advantages in production scheduling,public security,emergency communication and immediate communication.It also plays an important role in the national economy and people's lives.Due to its multi-functional and technical performance improvement and reformment,it has an important and far-reaching impact on inevitable combination of wireless communication field.Firstly,this paper briefly introduces the hierarchical model and the air interface of the digital trunking protocol,highlight the important position of the voice service in the digital trunking Walkie Talkie.Then,introduce the types and switching criterion of handover in wireless communication system.Introduce the TDMA technology and its advantages in digital trunking communication system.Secondly,due to the location of moving,terminal device receives signal weaker and weaker.The case may seriously affect the quality of calling,or even could not launch voice transmission.Introduce the voice handover function,according to the states of device in calling,the function is divided into the transmission and reception of voice.In the end,discuss and research its methods in-depth.Thirdly,the analysis of the missing word(including transmission and reception of voice)in handover is discussed.In particular,the optimized method is discussed,studied and demonstrated.The method of time slot synchronization in full network station is proposed.Optimize the handover to reduce the voice out of the words,and improve user experience.Then,according to the limitation of application with time slot synchronization,introduce the method of voice buffer technology,verify the theory and deduction in handover.In short,the handover function of calling is an important business of digital trunking Walkie Talkie.Through the discussion and research about time slot synchronization technology of full network and voice buffer technology,which are put forward and realized to improve voice calling effect,so that the digital trunking Walkie Talkie may have the widely range applications in the future.