Research Of Carrier Aggregation In LTE-Advanced

With the development of mobile communication technology and the increase of business diversification, the mobile communication market is facing more and more keen competition. Now 3G systems can't satisfy the requirement of market. So 3GPP brings up LTE-Advanced.This paper mainly discusses three contents. Firstly, analyze the type of CA, data aggregation schemes and the structure of scheduler. Secondly, research two scheduling algorithms under the multi-carrier aggregation. They are Joint carrier scheduling (JCS) and Independent carrier scheduling (ICS). Thirdly, two resource allocation rules are proposed to improve the performance of ICS. There are alternate allocation (AA) and Joint shortest queue (JSQ). Finally, evaluate the performance of two scheduling algorithms and resource allocation rules. The whole system simulation platform is implemented with C++. Through simulation, draw the following conclusions: (1) Under the three traffic models (full buffer, finite buffer and Burst), two antenna modes and different bandwidth, the performance of JCS is exceeded ICS. But when the traffic load is high, the performance is nearly equal. (2)In ICS scheme, the allocation rules JSQ is optimal performance.