Title :
A downlink multiplexing method in TDD packet radio networks with a multibeam adaptive array
Author :
Higashinaka, Masatsugu ; Ohgane, Takeo ; Ogawa, Yasutaka
Author_Institution :
Graduate Sch. of Eng., Hokkaido Univ., Sapporo, Japan
fDate :
6/23/1905 12:00:00 AM
Abstract :
A PRMA permitting multiple reservation with a multibeam adaptive array has been investigated considering uplink performance improvement. A downlink multiplexing method for TDD packet radio networks with a multibeam adaptive array is investigated. The transmission weight is calculated using the array response vector obtained in the uplink, and the downlink SINR of each terminal is estimated from the obtained weights to decide the multiplexing possibility. In downlink slots, the base station searches states of the downlink slots in the previous frame for the number of multiplexing users. If it is not equal to the maximum, the base station selects terminals, additionally or newly, from limited terminals with long packet delay. The computer simulation results show the improvement in throughput and average packet delay without increasing the processing load
Keywords :
adaptive antenna arrays; cellular radio; delays; multibeam antennas; packet radio networks; packet reservation multiple access; packet switching; radio links; radiofrequency interference; PRMA; PRN; TDD packet radio networks; array response vector; average packet delay; base station; cellular radio; computer simulation results; downlink SINR; downlink multiplexing method; multibeam adaptive array; multiple reservation; packet delay; packet reservation multiple access; processing load; throughput; transmission weight; uplink SINR; uplink performance; Adaptive arrays; Base stations; Computer simulation; Downlink; Intelligent networks; Local area networks; Packet radio networks; Protocols; Signal to noise ratio; Throughput;
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.2001.956412
