Title :
An improved location-based handover algorithm for GSM systems
Author :
Juang, Rong-Terng ; Lin, Hsin-Piao ; Lin, Ding-Bing
Author_Institution :
Inst. of Comput. & Commun., Nat. Taipei Univ. of Technol., Taiwan
Abstract :
The variation of signal strength caused by shadowing is a random process, and handover decision mechanisms based on measurements of signal strength induce the "ping-pong effect". The paper proposes an improved handover algorithm, which identifies the correlation among shadowing components based on an estimation of mobile velocity, to suppress the ping-pong effect. The impact of velocity estimation errors on handover performance is investigated. Simulation results indicate that the proposed approach can reduce the number of unnecessary handovers by 9-17% compared to the conventional method, while the signal outage probability remains similar.
Keywords :
cellular radio; mobility management (mobile radio); parameter estimation; probability; GSM systems; handover decision mechanisms; location-based handover algorithm; mobile velocity estimation; ping-pong effect suppression; shadowing; signal outage probability; signal strength variation; Fading; Fluctuations; Fuzzy logic; GSM; Global Positioning System; Quality of service; Random processes; Shadow mapping; Signal processing; Table lookup;
Conference_Titel :
Wireless Communications and Networking Conference, 2005 IEEE
Print_ISBN :
0-7803-8966-2
DOI :
10.1109/WCNC.2005.1424716
