Title :
Mobile radio window random-access algorithm with diversity
Author :
Yücel, Burak ; Deliç, Hakan
Author_Institution :
Dept. of Electr. & Electron. Eng., Bogazici Univ., Istanbul, Turkey
fDate :
11/1/2000 12:00:00 AM
Abstract :
We consider a mobile radio random-access algorithm equipped with a choice of three distinct antenna diversity plans (two-fold, maximum selection, or ideal selection diversity) to improve the performance. The algorithm is stable with high throughput and low delays. The mobile environment is regulated by the presence of multipath fading, shadowing, and path loss. The capture model is a threshold model based on the signal-to-interference ratio. The maximum throughput and optimal window size of the algorithm are analytically computed. The delay performance is evaluated through simulations, and significant improvement is demonstrated over slotted ALOHA under various mobile scenarios
Keywords :
access protocols; delays; digital simulation; diversity reception; fading channels; land mobile radio; losses; multipath channels; packet radio networks; radiofrequency interference; random processes; antenna diversity; capture model; delay performance; high throughput; ideal selection diversity; low delays; maximum selection diversity; maximum throughput; mobile radio link; mobile radio window random-access algorithm; multipath fading; multipath scattering; optimal window size; packet transmission; path loss; shadowing; signal-to-interference ratio; simulations; slotted ALOHA; stable algorithm; threshold model; two-fold diversity; Antennas and propagation; Computational modeling; Delay; Fading; Land mobile radio; Mobile antennas; Multiaccess communication; Shadow mapping; Signal processing; Throughput;
Journal_Title :
Vehicular Technology, IEEE Transactions on
