Radio communication system, base station, relay station, mobile station, and packet transmission control method
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United States of America Patent
Stats
-
Apr 14, 2009
Grant Date -
Jul 3, 2003
app pub date -
Dec 26, 2002
filing date -
Dec 28, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The object is to control interference in a permissible range by applying the CDMA system to signal collision in the conventional CSMA and TDMA base multihop systems and to relax the hidden terminal problem and others to enhance the throughput of the entire system by grouping of channel groups in multihop transmission and by control of transmission based on an interference level from another station. A multihop relay station calculates a desired signal level, for example, from an interference level at its own station of a packet sent from a mobile station, and notifies the mobile station of the desired signal level; and the mobile station calculates a transmission power amount of a packet from the desired signal level, determines whether the packet is transmissible to the station as a source of the desired signal level, and transmits the packet to the source station determined as a packet-transmissible station.
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