Inter-Access Point Interference Avoidance for Broadband Wireless Access Systems.

Accession number;03A0163632
Title;Inter-Access Point Interference Avoidance for Broadband Wireless Access Systems.
Author; TSUBAKI TOSHIMITSU (Nippon Telegraph and Telephone Corp. (NTT), Network Innovation Lab., JPN) NUNO FUSAO (Nippon Telegraph and Telephone Corp. (NTT), Network Innovation Lab., JPN) OTA ATSUSHI (Nippon Telegraph and Telephone Corp. (NTT), Access Network Serv. Systems Lab., JPN) KAGAMI OSAMU (Nippon Telegraph and Telephone Corp. (NTT), Access Network Serv. Systems Lab., JPN)
Journal Title;IEICE Transactions on Communications (Japanese Edition)
Journal Code:S0622C
ISSN:1344-4697
VOL.J86-B;NO.3;PAGE.458-467(2003)
Figure&Table&Reference;FIG.13, TBL.2, REF.11
Pub. Country;Japan
Language;Japanese
Abstract;HiSWANa (ARIB STD-T70) of a wireless access system using 5 GHz band is expected to be a system capable of supplying data speed of more than 20 Mbit/s. In Japan, carrier frequency usable at 5 GHz is few on four waves, and by considering cases where plural base stations are present in a same area, it is necessary to solve lack of frequency resources. Under such a condition, it is effective to mutually carry out time division between base stations using the same frequency. In this paper, was proposed intra-base station shynchronization working the base stations through their autonomous dispersion control, for realization of time division, to report on their feature evaluation results. As results of computer simulation and experiment, it was elucidated that time division could be realized by the proposed intra-base station synchronization method under not only forecasting environment of every base stations but also disappered base station environment. And, it was also confirmed that under an environment of -72 dBm in receiving level between base stations, better stability of within 12 micro-seconds in BCH transmission timing error after time division could be obtained.
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