The td-scdma LTE system mobility management (i.e., re-election/switch) the main purpose is to realize the resource equilibrium, frequency reuse, a better quality of the user is always in the network community, to carry on the business; Mobility management according to the state of UE without is divided into two aspects: the first is the idle state of mobile management, another is the connection mode of mobile management, under the free state of mobile management mainly through choice or heavy on the selected to realize the village transformation, controlled by the UE transformation occurs; Connection state of mobility management mainly through the village to implement switch, switch controlled by the base station,

a, mobility management is what

Mobility management is a necessary 杋 cellular mobile communication system, can assist the L tau epsilon system load balancing, and improve the user experience, and overall system performance,

2, mobility management knowledge

Mobility including the mobility and the connection under the idle condition of mobility,

Plot selection, the re-election mobility of a free state, the basic use of UMTS system principle, only changed the measurement attributes, neighborhood selection/re-election criteria, such as PLMN selection based on the principle of UMTS PLMN selection principles of

Switch belongs to the mobility of the connection state, switch in the LTE system USES the network control, UE to assist the way

LTE belong to after switch to switch: switch process initiated by the source base station, is characterized by the source base station take the initiative to send UE context (context) to the target base stations,