This paper first introduces the TD-LTE HetNet

present the realization of TD-LTE HetNet in recent

medium-term on account of TDD spectrum resources and deployment requirements

and put forward the basic requirements of the interlayer mobility management

and then analyses the interlayer interoperability mechanism of 3GPP

at last

this paper analyzes the complete and practical scheme of cell selection based on the quality and priority

the handover mechanism based on frequency priority and load balance apply to the deployment of multi frequency network.