Throughput Optimization of Multi-BSS IEEE 802.11 Networks With Universal Frequency Reuse
Throughput Optimization of Multi-BSS IEEE 802.11 Networks With Universal Frequency Reuse
复制标题
具有通用频率复用的多 BSS IEEE 802.11 网络的吞吐量优化
DOI：
10.1109/tcomm.2017.2706280
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发表时间：
2017-08-01
影响因子：
8.3
通讯作者：
Hei, Xiaojun
中科院分区：
文献类型：
--
作者：
Gao, Yayu;Dai, Lin;Hei, Xiaojun
对于具有多个基本服务集（BSS）的IEEE 802.11网络，大多数研究都集中在如何为BSS分配不同的频率子信道以最小化同频干扰。然而，随着子信道带宽的显着增加，研究通用频率复用的网络性能变得越来越重要。在本文中，我们重点关注上行链路 M-BSS IEEE 802.11 网络，其中所有 BSS 共享频带而不是在不同的子信道上运行。通过根据可以听到的接入点（AP）集合将每个BSS中的节点分为多个组，得到饱和条件下M个BSS的稳态点，作为每个组中的节点数和每个BSS节点的初始退避窗口大小的函数。最大网络吞吐量的进一步特征是最佳地选择所有节点的初始退避窗口大小，并且显示出密切依赖于多个 AP 可以侦听的节点的百分比。与正交频分的比较表明，尽管最大网络吞吐量由于BSS之间的干扰而下降，但通过通用频率复用仍然可以实现更高的网络数据速率，这使其成为多BSS IEEE 802.11网络的优选选择。
For IEEE 802.11 networks with multiple basic service sets (BSSs), most studies have focused on how to allocate different frequency sub-channels to BSSs for minimizing the co-channel interference. With the significant increase of the sub-channel bandwidth, however, it becomes increasingly important to study the network performance with universal frequency reuse. In this paper, we focus on an uplink M-BSS IEEE 802.11 network, where all the BSSs share the frequency band rather than operate at different sub-channels. By dividing the nodes in each BSS into multiple groups according to the set of access points (APs) they can be heard by, the steady-state points of M BSSs in saturated conditions are obtained as the functions of the number of nodes in each group and the initial backoff window size of nodes of each BSS. The maximum network throughput is further characterized by optimally choosing the initial backoff window sizes of all the nodes and shown to be closely dependent on the percentage of nodes that can be heard by multiple APs. The comparison with orthogonal frequency division reveals that although the maximum network throughput is degraded due to interference among BSSs, a higher network data rate can still be achieved by universal frequency reuse, which makes it a preferable option for multi-BSS IEEE 802.11 networks.