Power Control in Wireless Communications Networks - from a Control Theory Perspective
نویسندگان
چکیده
The global communications system today (the telephone system yesterday) is considered as the largest man-made system all categories. While the demand for increased bandwidth in such systems increases, an increased interest in utilizing the available resources efficiently can be observed. Here, the subset of wireless cellular communications systems will be in focus and methods for transmitter power control. Relevant aspects of power control are discussed with emphasis on practical issues, using an automatic control framework. Generally, power control of each connection is distributedly implemented as cascade control, with an inner loop to compensate for fast variations and an outer loop focusing on longer term statistics. Issues as capacity, load and stability are discussed and related to whether it is possible to accommodate the requirements of all users or not. The operation of such algorithms are illustrated by simulations. Copyright c © 2002 IFAC
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