An extremely-distributed switching control system for mobile communications networks

该项目研究用于移动通信的极端分布式交换控制网络，其中片上系统交换系统位于每个基站。这将有助于在未来的多媒体移动通信网络中向高速移动终端提供高速分组通信。这也是为了在微蜂窝网络中容纳基于IP的高速终端，这是无线资源重用所不可缺少的。本项目关注的是PON(无源光网络)作为移动通信网络的接入网络。PON的广播机制允许在几个微小区之间移动期间的连续分组通信。该报告提出了一种动态逻辑宏小区的概念，通过向每个基站和无线链路广播相同的分组，允许在逻辑宏小区区域中进行软切换。此外，动态逻辑宏小区可以随着终端的移动而移动。这可以抑制在硬切换时的比特差错，该比特差错永远不会在小区边界发生。对于基于IP的通信，FA(外地代理)位于PON的多个OLT(光线路终端)S之外，允许终端在直径40公里的区域内无需FA切换即可移动。本报告还介绍了基于IP的终端的软切换过程。在动态逻辑宏小区中，使用相同的广播IP地址。

This project studies extremely-distributed switching control networks for mobile communications, where a system-on-a-on-chip switching system locates at each base-station. This is to contribute to providing high-speed packet communications to high-speed mobile terminals in the future multimedia mobile communication network. This is also to permit accommodation of IP-based high-speed terminals in micro-cellular network which is indispensable for radio resource reuse.This project focused on PON (Passive Optical Network) as an access network for the mobile communication network. The broadcasting mechanism of the PON allows continuous packet communications during the movement among several micro-cells. This report proposes a dynamic logical macro-cells concept, which allows the soft-handover in the logical macro-cell region by broadcasting the identical packet to every base station and wireless link. In addition, the dynamic logical macro-cell can move following the movement of the terminals. This can inhibit bit errors at hard-handover which never falls to happen at the border of the cells. As for the IP-based communications, FA (Foreign Agent) locates beyond several OLTs (Optical Line Terminal)s of PON, and permits terminal movement without FA switch-over in a region of 40 km diameter. This report also presents soft-handover procedure for IP-based terminals. In the dynamic logical macro-cell, an identical broadcasting IP address is used.