IEEE论文关于 traffic的

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An Adaptive Soft Handover Algorithm
for Traffic-load Shedding in the WCDMA Mobile

Communication System



Won-Ik Kim and Chang-Soon Kang

Mobile Telecommunication Research Laboratory

Electronics & Telecommunications Research Institute

Daejeon, KOREA

E-mail: woniks@etri.re.kr, cskang@etri.re.kr










































Abstract—In a mobile telecommunication environment, an
abrupt increase of mobile users in a specific cell causes an
unbalanced traffic-load distribution. When the increased traffic-
load exceeds the link capacity of a WCDMA system, it
significantly degrades the traffic quality of the mobile users. In
this paper, we propose an adaptive soft handover algorithm
(ASHA) to efficiently alleviate the overloaded traffic in a cell by
adjusting handover parameters. The proposed algorithm
virtually reduces the service coverage of the overloaded cell
without adjustment of base station transmission power.
Consequently, mobile users located in the area farthest away
from the heavily loaded cell site are handed over to lightly loaded
neighboring cells, so that the traffic-load of the overloaded cell is
decreased. The performance of the proposed algorithm is
analyzed in path loss and shadow fading environments and is
compared with that of a conventional soft handover algorithm.