CELL

1. In cellular mobile , the geographical area covered by the smaller of: a base station , or a subsystem ( sector antenna ) of that base station corresponding to a specific logical identification on the radio path . Note: Mobile stations in a cell may be reached by the corresponding radio equipment of the base station. 2. In communications , a string that contains a header and user information . Note 1: A cell is dedicated to one user for one session. Cells for a given system are usually of fixed length and smaller than a frame , such as 424 bits for a cell, compared to 1024 for a frame. Note 2: In asynchronous transfer mode (ATM) systems, a cell consists of 53 bytes, i.e., a 5- byte header field and a 48-byte information field . Note 3: A cell does not have error -correction capability and is therefore suited for low-BER communications systems, such as digital fiber optic systems. 3. In OSI, a fixed-length block labeled at the Physical Layer of the Open Systems Interconnection--Reference Model (OSI--RM). 4. In computer systems, an addressable, internal hardware location. 5. In computer applications, a single location on a spreadsheet.