A Simple Scheduling Restriction Scheme for Interference Coordinated Networks
A Simple Scheduling Restriction Scheme for Interference Coordinated Networks
复制标题
一种简单的干扰协调网络调度限制方案
DOI：
10.1109/vtcfall.2012.6399036
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
N. Miki
中科院分区：
文献类型：
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作者：
M. Jeong;N. Miki
调度限制在高级LTE中作为减少干扰协调异构网络（HetNet）中的功率消耗和网络开销的技术引起了很多关注。具有小区间干扰协调（ICIC）的这种网络提供具有不同信道质量统计的两个无线电资源。其中一个资源被保护（不受保护）免受小区间干扰（因此，称为受保护（不受保护）资源），并且具有较高（较低）的平均信道质量。在没有调度限制的情况下，信道质量反馈将加倍以反映两个资源的这种质量差异。我们提出了一个简单的调度限制方案，解决了这个问题，没有显着的性能下降。在两个资源之间具有相对较大（较小）平均信道质量差的用户仅在受保护（非受保护）资源中被调度，并且由简化静态信道下的比例公平资源分配（PFRA）确定的边界用户取决于PFRA而在两个资源中的任一个或两个上被调度。使大多数用户仅在一个资源中被调度，可以避免在其他资源上的信道质量反馈所需的功耗和网络开销。LTE-Advanced下行链路的系统级仿真表明，由于我们的调度限制方案的性能下降不到2%，平均反馈减少40%。
Scheduling restriction is attracting much attention in LTE-Advanced as a technique to reduce power consumption and network overhead in interference coordinated heterogeneous networks (HetNets). Such a network with inter-cell interference coordination (ICIC) provides two radio resources with different channel quality statistics. One of the resources is protected (unprotected) from inter-cell interference (hence, called protected (non-protected) resource) and has higher (lower) average channel quality. Without scheduling restriction, the channel quality feedbacks would be doubled to reflect such quality difference of the two resources. We present a simple scheduling restriction scheme that addresses the problem without significant performance degradation. Users with relatively larger (smaller) average channel quality difference between the two resources are scheduled in the protected (non-protected) resource only, and a boundary user, determined by a proportional fair resource allocation (PFRA) under simplified static channels, is scheduled on either of the two resources or both depending on PFRA. Having most users scheduled in only one of the resources, power consumption and network overheads that would otherwise be required for the channel quality feedbacks on the other resource can be avoided. System level simulation of LTE-Advanced downlink shows that the performance degradation due to our scheduling restriction scheme is less than 2%, with the average feedback reduction of 40%.