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Study of a Multiuser Resource Allocation Scheme for a 2-Hop OFDMA Virtual Cellular Network

机译：2跳OFDMA虚拟蜂窝网络的多用户资源分配方案的研究

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摘要

In the next generation mobile network, the demand for high data rate transmission will require an increase in the transmission power if the current mobile cellular network architecture is used. Multihop networks are considered to be a key solution to this problem. However, a new resource allocation algorithm is also required for the new network architecture. In this paper, we propose a resource allocation scheme for a parallel relay 2-hop OFDMA virtual cellular network (VCN) which can be applied in a multiuser environment. We evaluate, by computer simulation, the ergodic channel capacity of the VCN using the proposed algorithm, and compare the results with those of the conventional single hop network (SHN). In addition, we analyze the effect of the location of the relay wireless ports on the ergodic channel capacity of the VCN. We also study the degree of fairness of the VCN, using the proposed scheme, compared with that of the SHN. For low transmission power, the simulation results show: a) the VCN can provide a better ergodic channel capacity and a better degree of fairness than the SHN, b) the distance ratio for which the ergodic channel capacity of the VCN is maximal can be found in the interval 0.2～0.3, c) the ergodic channel capacity of the VCN remains better than that of the SHN as the number of users increases, and d) as the distance between the relay WPs and the base station increases, the channel capacity of VCN approaches that of the SHN.
机译：在下一代移动网络中，如果使用当前的移动蜂窝网络架构，则对高数据速率传输的需求将要求传输功率的增加。多跳网络被认为是解决此问题的关键解决方案。但是，新的网络体系结构也需要新的资源分配算法。在本文中，我们提出了一种可在多用户环境中应用的并行中继2跳OFDMA虚拟蜂窝网络（VCN）的资源分配方案。我们通过计算机仿真使用提出的算法评估VCN的遍历信道容量，并将结果与​​常规单跳网络（SHN）进行比较。此外，我们分析了中继无线端口的位置对VCN遍历通道容量的影响。我们还使用提议的方案研究了VCN与SHN的公平程度。对于低传输功率，仿真结果表明：a）VCN可以提供比SHN更好的遍历信道容量和更好的公平性，b）可以找到VCN的遍历信道容量最大的距离比在0.2〜0.3范围内，c）随着用户数量的增加，VCN的遍历信道容量保持比SHN更好，并且d）随着中继WP与基站之间的距离增加，VCN的遍历信道容量VCN接近SHN。

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