Flexible Frame Design for Carrier Aggregation Device in IMT-Advanced System
Xuejun Liang, Weimin Wu, Limin Shui, Xiaxi Yang · 2012
In IMT-Advanced system, carrier aggregation makes use of continuous or non-continuous spectrum which may be scattered in many channels, and then the individual component carrier frame is combined to form a new frame structure named frame aggregation. In this paper, flexible frame aggregation strategies are designed for different carrier aggregation situation in order to reduce the duplex delay existed in time division duplex (TDD) mode. The flexible frame aggregation not only supports backward compatibility and asymmetric business but also improves the efficiency of hybrid automatic repeat request (HARQ) and channel quality information (CQI) feedback process.