小区分层结构(精阅)（Residential hierarchical structure (read carefully)）.doc

小区分层结构(精阅)（Residential hierarchical structure (read carefully)） The hierarchical structure of cell The hierarchical structure of cell download I. Introduction A lot of big business plan is to get enough capacity using small cell structure. Application of low CELL is often small antenna coverage is made, so to get better coverage must have a number of areas. There is a way to reduce the cell number of small CELL provides the main service area coverage, and coverage of CELL small CELL signal strength is not enough, in order to achieve this goal, the need for a distribution service between large and small CELL CELL logic. The hierarchical structure of the cell (HCS) is to provide the logic. This function is performed in the BSC. Two, background The first GSM positioning operation is based on the best service, which means that under normal circumstances the mobile station selection area is MS the current location on the transmission power of the highest area, so if you want to achieve small CELL for business and CELL absorption to cover the idea, must be in the same area having different size the cells are mixed together, it will not be easy. Although the signal from the adjacent CELL received, if the local interference is small, small CELL also have enough quality. Suppose that a mobile station is locked in a small CELL to a mobile CELL, when CELL becomes better when even small CELL can provide acceptable quality of the mobile station will switch to CELL or. With another additional reason complex layer cell is capacity redundancy. If the maximum volume of business in the design of a network with only small CELL calculation, so the high-rise residential will be used to share a part of the business at the peak of the business. Layered cell structure function allows a network with community structure of two or three layers of high-rise residential for large CELL and low layer cell for small CELL. Hierarchical cell function is an integral part of the positioning operation.