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

Volume

3

fYear

2001

fDate

6/23/1905 12:00:00 AM

Firstpage

1329

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2001. VTC 2001 Fall. IEEE VTS 54th

Conference_Location

Atlantic City, NJ

ISSN

1090-3038

Print_ISBN

0-7803-7005-8

Type

conf

DOI

10.1109/VTC.2001.956412

Filename

956412