Sizing X2 Bandwidth for Inter-Connected eNBs
Sizing X2 Bandwidth for Inter-Connected eNBs
复制标题
DOI：
10.1109/vetecf.2009.5378834
复制
发表时间：
2009-09
期刊：
影响因子：
--
通讯作者：
I. Widjaja;Humberto J. La Roche
中科院分区：
文献类型：
--
作者：
I. Widjaja;Humberto J. La Roche
LTE是由3GPP开发的下一代无线网络技术。LTE的一个独特之处在于相邻的enb可以通过X2接口直接互连，以促进控制消息的直接交换，并在切换期间转发用户数据。本文研究了控制平面业务和用户平面业务的X2带宽需求。我们首先考虑单个ue独立跨越单元边界的情况。然后，我们扩展到ue组可能同时跨越单元边界的情况。在这两种情况下，我们分析X2接口上满足特定性能目标所需的带宽。我们的结果通常表明，与S1-U带宽相比，X2带宽需求非常小。然而，当多组终端同时执行切换时，X2带宽需求可能会显著增加。
LTE is a next-generation wireless network technol- ogy being developed by 3GPP. One unique aspect of LTE is that neighboring eNBs can be directly interconnected through X2 interface to facilitate direct exchange of control messages and to forward user data during handover. In this paper, we investigate the X2 bandwidth requirement for both control-plane traffic and user-plane traffic. We first consider the case where individual UEs cross cell boundaries independently. We then extend to the case where groups of UEs may cross cell boundaries simultaneously. In both cases, we analyze the bandwidth needed on the X2 interface to meet a certain performance objective. Our results generally indicate that the X2 bandwidth requirement is very small compared to S1-U bandwidth. However, the X2 bandwidth requirement may potentially increase significantly when groups of UEs perform handover simultaneously.