Performance of Uplink Carrier Aggregation in LTE-Advanced Systems

Carrier aggregation (CA) has been proposed to aggregate two or more component carriers (CCs) to support a much wider transmission bandwidth for LTE-Advanced systems. With carrier aggregation, it is possible to schedule a user equipment (UE) on multiple component carriers simultaneously. In this paper, we evaluate the performance of uplink CA in LTE-Advanced systems with different CC allocation schemes. We first present the radio resource management (RRM) framework of multi-component carrier LTE-Advanced systems, with special attention on CC selection, adaptive transmission bandwidth, and uplink power control. Simulation results show that with CA and advanced CC selection algorithm, the cell edge user throughput of LTE-Advanced UEs maintains the same as Rel'8 UEs, but substantial performance gains can be achieved in terms of average and cell center user throughput, especially in low load traffic conditions.

[1]  Li Chen,et al.  Analysis and Simulation for Spectrum Aggregation in LTE-Advanced System , 2009, 2009 IEEE 70th Vehicular Technology Conference Fall.

[2]  Klaus I. Pedersen,et al.  Performance of Uplink Fractional Power Control in UTRAN LTE , 2008, VTC Spring 2008 - IEEE Vehicular Technology Conference.

[3]  Malek Boussif,et al.  Load adaptive power control in LTE Uplink , 2010, 2010 European Wireless Conference (EW).

[4]  Chunyan Feng,et al.  A Resource Scheduling Algorithm Based on User Grouping for LTE-Advanced System with Carrier Aggregation , 2009, 2009 International Symposium on Computer Network and Multimedia Technology.

[5]  Preben E. Mogensen,et al.  Carrier load balancing methods with bursty traffic for LTE-Advanced systems , 2009, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications.

[6]  Preben E. Mogensen,et al.  Resource allocation considerations for multi-carrier LTE-Advanced systems operating in backward compatible mode , 2009, 2009 IEEE 20th International Symposium on Personal, Indoor and Mobile Radio Communications.

[7]  Yang Yang,et al.  Carrier aggregation for LTE-advanced mobile communication systems , 2010, IEEE Communications Magazine.

[8]  Preben E. Mogensen,et al.  Adaptive Transmission Bandwidth Based Packet Scheduling for LTE Uplink , 2008, 2008 IEEE 68th Vehicular Technology Conference.