Unicast and Broadcast Packet Sharing Method for OFDM Multi-Base Station System with Array Antenna on Mobile Terminal

Takeo FUJII  Masao NAKAGAWA  

Publication
IEICE TRANSACTIONS on Communications   Vol.E85-B   No.2   pp.514-522
Publication Date: 2002/02/01
Online ISSN: 
DOI: 
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technology
Keyword: 
OFDM,  unicast and broadcast packet,  adaptive array antenna,  frequency sharing,  multi base station,  

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Summary: 
In this paper, we propose a method of unicast and broadcast packet sharing for the orthogonal frequency division multiplexing (OFDM) multi-base station (BS) indoor wireless communication system using an adaptive array antenna on mobile terminals. The adaptive array antenna placed on the mobile terminal allows quality improvement due to the diversity effect when the data transmitted from all BSs are the same, and provides capacity improvement by channel sharing when the data from each BS are different. In the proposed sharing method, unicast packets are transmitted independently from multiple BSs in order to increase the communication capacity, and broadcast packets are transmitted simultaneously with other BSs in order to enhance the communication quality without retransmission. Furthermore, by modifying the packet assignment procedure, we confirm that quality can be improved for unicast packets in a low traffic environment.