Abstract:

As one of the key use cases in Long Term Evolution Self-Organization Network (LTE SON), the coverage and capacity optimization (CCO) is the technology which provides the optimal coverage and capacity performance support high-data-rate service and decrease the operator capital expenditures (CAPEX) and operational expenditures (OPEX). In LTE system, some factors (e.g. load, traffic type, user distribution, uplink power setting, inter-cell interference and etc) limit the coverage and capacity performance. From the view of single cell, it always pursuits maximize performance of coverage and capacity by optimizing the uplink power setting and intra-cell resource allocation, but this may result in decreasing the performance of its neighbor cells. Therefore, the benefit of every cell conflicts each other. In order to tradeoff the benefit of every cell and maximize the performance for the whole network, this paper proposes a multi-cell uplink power allocation scheme based on non-cooperative games. The scheme aims to make the performance of coverage and capacity balanced by negotiation of the uplink power parameters among multi-cells. So the performance of every cell can reach the Nash equilibrium, making it feasible to reduce the inter-cell interference by setting an appropriate uplink power parameter. Finally, the simulation shows the proposed algorithm can effectively enhance the performance of coverage and capacity in LTE network.

Key words:

coverage and capacity, power control, non-cooperative game, Nash equilibrium