文件名称：覆盖区定义-华为CDMA2000
文件大小：3.95MB
文件格式：PPT
更新时间：2024-05-13 05:52:08
cdma
覆盖区定义 Cell 位置区 MSC 区 PLMN 区 服务区 扇区 CDMA 编号计划 小区 In a cell mobile communication network, there are many base stations and a mobile station has no fixed position. No matter where a mobile user in a service area moves, a mobile communication network must have the function of switching control so as to achieve such performance as location update, handoff and automatic roaming. In the mobile communication network architecture made up of a CDMA system, the definition of an area is shown in the figure. Service area A service area refers to the area where a mobile station can obtain services, namely, the area where the users in different communication networks (PLMN, PSTN or ISDN) can communicate with a mobile station without knowing its actual location. A service area may be made up of one or more Public Land Mobile Network (PLMN) and may be a country, part of a country or many countries. PLMN PLMN area is a geographic area where a PLMN provides communication services. PLMN can be considered as the extension of a network (such as ISDN or PSTN). One PLMN area may be made up of one or more Mobile Switching Centers (MSC). Within this area, there are common numbering systems (for example, the same national area code) and common routing plans. MSC forms the function interface between a fixed network and a PLMN and is used for call connection. MSC area An MSC area is part of the PLMN made up of the areas covered by all the cells controlled by an MSC. An MSC area can be made up of one or more location areas. Location area A location area refers to an area where a mobile station can move arbitrarily without any location update. A location area may be made up of one or more cells (or base station area). Paging signals can be transmitted simultaneously from all base stations in a location area to call a mobile station. Base station area An area covered by all cells included by one or more Base Transceiver Stations (BTS) located in the same base station point. Cell A wireless coverage area identified with a base station identification number or cell global identification. When an omni antenna is adopted, a cell is a base station area. Sector The area covered by a directional antenna in a base station is called a sector.