H - Electricity – 04 – B
Patent
H - Electricity
04
B
H04B 7/216 (2006.01) H04L 12/56 (2006.01) H04Q 7/20 (2006.01) H04Q 7/30 (2006.01) H04Q 7/32 (2006.01) H04Q 7/38 (2006.01)
Patent
CA 2415132
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 calculate 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, on the basis of the transmission power amount, and transmits the packet by a power of the transmission power amount to the source station determined as a packet-transmissible station. On this occasion, an interference signal is weakened by assignment of channel groups 1,2 for transmission of signals.
Fujiwara Atsushi
Otsu Toru
Takeda Shinji
Yamao Yasushi
Yoshino Hitoshi
Fetherstonhaugh & Co.
Ntt Docomo Inc.
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