Capacity-Fairness Trade-Off Using Coordinated Multi-Cell Processing

Abstract

Abstract-Multi-cell processing, also called Coordinated Multiple Point (CoMP), is a promising distributed technique that uses neighbour cells' antennas. It is expected to be the part of next generation cellular standards such as LTE-A. Small cell networks in dense urban environments are limited by interferences and CoMP can strongly take advantage of this fact to improve cell-edge users' throughput. The present study introduces a distributed criterion for mobiles to select their optimal set of Base Stations (BS) to perform CoMP, and evaluates the impact of this association on the fairness and the total cell throughput. For that, we use a known theoretical expression for the capacity outage probability of CoMP under Rayleigh fading and evaluate the goodputs of antennas associations. The proposed criterion is used in combination with α-fair resource allocation to perform a joint double-objective optimization of fairness and efficiency.

Subcarrier allocation in multi-cell OFDMA wireless networks with non-coherent base station cooperation and controllable fairness

“…is the channel gain of MU k on subcarrier f in cell n. Similar to [10], Alamouti-like pre-coding is used to optimize the received SINR. Thus, the beamforming that is necessary for a coherent-BSC can be avoided here.…”

“…Last equation in C.1 means one subcarrier is either allocated to local MU, or allocated to cooperative MU in neighboring cells. Almost all previous works utilize passive cooperation between BS, which applies a "request and response" mode [10]. When a MU suffers from poor SINR, this MU or its local BS will send request of cooperation to its cooperative BS.…”

“…To this end, non-coherent BSC (NC-BSC) is proposed in the present paper which needs neither clock synchronization nor phase alignment. Among the previous works that involved in non-coherent coordination among BS include [9] where the two-cell framework of NC-BSC power allocation problem is investigated, and [10] which deals with the optimal selection of cooperative set of BS with the capacity-fairness tradeoff.…”

Capacity growth of heterogeneous cellular networks

“…In related work, a substantial effort has been expended to understand the extent and to mitigate overlay‐underlay interference issues, for example in [6] and [8]. The rest of this paper is organized as follows.…”