In 3GPP Long Term Evolution (LTE) networks, the frequency reuse schemes such as fractional frequency reuse (FFR) and soft frequency reuse (SFR) are used to improve system capacity. The allocation of transmit power and subcarriers to each cell in these schemes are fixed prior to network deployment. This limits the potential performance of these frequency reuse schemes. In this paper, we propose to improve the capacity of SFR scheme by jointly optimizing subcarrier and power allocation in multi-cell LTE networks. An iterative algorithm that can adaptively vary the number of major subcarriers and adjust the transmit power for each cell according to wireless traffic loads is proposed. Simulation results show that the proposed algorithm outperforms the existing Reuse 1, FFR and static SFR schemes in both system throughput and cell edge user performance.
|Title of host publication||2012 IEEE Wireless Communications and Networking Conference, WCNC 2012|
|Number of pages||6|
|Publication status||Published - 2012|
|Event||2012 IEEE Wireless Communications and Networking Conference, WCNC 2012 - Paris, France|
Duration: 1 Apr 2012 → 4 Apr 2012
|Other||2012 IEEE Wireless Communications and Networking Conference, WCNC 2012|
|Period||1/04/12 → 4/04/12|