Abstract:

The multi-carriers aggregation was an key technology for LTE-advanced（LTE-A）system，it can solve the needs of bandwidth resources of LTE-A. Since the radio of different frequency bands have different transmission power/coverage，which will result in the trouble of handoff between cells. In this paper，based on LTE handoff process，analysing carrier handoff scenes and carrier handoff process at the same cell and different cells in carrier aggregation. In order to reduce the failure rate of multi-carriers handoff，handoff desire should be sent to more adaptive contiguous cells and selecting the optimal cell. Two multi-carriers handoff methods are designed for multi-objective eNB.

Key words: LTE-A, multi-carrier system, handoff process analysis