Handover between macrocell and femtocell for UMTS based networks
Handover between macrocell and femtocell for UMTS based networks
复制标题
基于 UMTS 网络的宏蜂窝和毫微微蜂窝之间的切换
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
Y. Jang
中科院分区：
文献类型：
--
作者：
M. Z. Chowdhury;W. Ryu;E. Rhee;Y. Jang
使用家庭基站和现有的xDSL或其他电缆线路作为回程连接的毫微微蜂窝网络可以满足无线通信系统即将到来的高数据速率的需求，并且可以扩展覆盖范围。因此，需要修改现有网络的切换过程来支持宏蜂窝/毫微微蜂窝集成网络。为了将毫微微蜂窝网络与现有的基于 UMTS 的宏蜂窝网络集成，对现有网络和协议架构进行一些修改是必要的。由于不同的 2 层小区（宏小区和毫微微小区）环境，这些修改改变了切换过程的信号流。宏小区和毫微微小区之间的切换应考虑信干比参数的测量。频繁且不必要的切换是分层网络环境的另一个问题，必须对其进行优化以提高宏蜂窝/毫微微蜂窝集成网络的性能。在本文中，我们首先提出基于集中器和不基于集中器的毫微微蜂窝网络架构。然后，我们提出具有适当参数的信号流，用于基于 3GPP UMTS 的宏蜂窝和毫微微蜂窝网络之间的切换。本文还提出了一种最小化不必要切换的方案。我们模拟所提出的切换优化方案以验证性能。
The femtocell networks that use home base station and existing xDSL or other cable line as backhaul connectivity can fulfill the upcoming demand of high data rate for wireless communication system as well as can extend the coverage area. Hence the modified handover procedure for existing networks is needed to support the macrocell/femtocell integrated network. Some modifications of existing network and protocol architecture for the integration of femtocell networks with the existing UMTS based macrocell networks are essential. These modifications change the signal flow for handover procedures due to different 2-tier cell (macrocell and femtocell) environment. The measurement of signal-to-interference ratio parameter should be considered for handover between macrocell and femtocell. A frequent and unnecessary handover is another problem for hierarchical network environment that must be optimized to improve the performance of macrocell/femtocell integrated network. In this paper, firstly we propose the concentrator based and without concentrator based femtocell network architecture. Then we present the signal flow with appropriate parameters for the handover between 3GPP UMTS based macrocell and femtocell networks. A scheme for unnecessary handoff minimization is also presented in this paper. We simulate the proposed handover optimization scheme to validate the performance.