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Load management in future wideband DS-CDMA systems with non-uniform traffic distribution

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1 Author(s)
Hjelm, B. ; Colorado Univ., Boulder, CO, USA

A vast importance is being placed worldwide on the development of third-generation mobile systems and wideband code division multiple access (CDMA) is emerging as the dominant choice for future personal communications systems. In a wideband CDMA based cellular network, the mobile arriving to the system will choose the base station with minimum path loss. Though planned with sufficient capacity, uneven traffic load in a cellular system may occur, creating a “hot spot” exceeding the pre-determined capacity and introducing large blocking probability. When non-uniform traffic distribution occurs it is desirable to re-allocate the radio resources to allow all cells to carry the desired amount of traffic. This work shows that it is possible to gain capacity by moving the cell borders and an algorithm for adaptive power planning is proposed that decrease the cell size by changing the output power of the base station with a high traffic load. The algorithm is simulated, using a snapshot model, and it is shown that the algorithm reduces system outage

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Personal, Indoor and Mobile Radio Communications, 2000. PIMRC 2000. The 11th IEEE International Symposium on  (Volume:2 )

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