Title :
Packet communications with slotted ALOHA in a mobile cellular system
Author :
Yamada, Makoto ; Hara, Yoshitaka ; Kamio, Yukiyoshi ; Hara, Shinsuke
Author_Institution :
YRP Mobile Telecommun. Key Technol. Res. Labs. Co. Ltd., Yokosuka, Japan
fDate :
6/23/1905 12:00:00 AM
Abstract :
We present a simple uplink access technique for packet data communications in a mobile environment. This technique is an application of a random-access communication scheme with slotted ALOHA to a wireless cellular system. All base stations connected to a control station use a common frequency and have synchronized slots. Mobile terminals can transmit packets at any time and do not require slot reservation, handover control, or transmission power control. This system can perform base station diversity reception with selective combining or with maximal ratio combining (MRC) in the uplink. Computer simulation shows that throughput is much improved when base stations use adaptive array antennas. In addition, the effects of the limitation of retransmissions on throughput and service fairness for all mobile terminals are analyzed
Keywords :
access protocols; cellular radio; data communication; diversity reception; packet radio networks; telecommunication congestion control; telecommunication traffic; MRC; adaptive array antennas; base station diversity reception; common frequency; maximal ratio combining; mobile cellular system; packet data communications; random-access communication; retransmissions; selective combining; service fairness; slotted ALOHA; synchronized slots; throughput; uplink access technique; Adaptive arrays; Base stations; Communication system control; Data communication; Diversity reception; Frequency synchronization; Mobile communication; Power control; Throughput; Wireless cellular systems;
Conference_Titel :
Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th
Conference_Location :
Atlantic City, NJ
Print_ISBN :
0-7803-7005-8
DOI :
10.1109/VTC.2001.956419
