RADIO COMMUNICATION APPARATUS AND INTERFERENCE AVOIDING METHOD
First Claim
1. A communication method for performing frequency hopping using a plurality of slots, the communication method comprising:
- communication including;
setting, among a plurality of frequency bands, a frequency band according to each of the plurality of slots; and
performing communication with a communication apparatus using the set frequency band;
standby including;
setting, among the plurality of frequency bands, the frequency band according to each of the plurality of slots by skipping at least one slot among the plurality of slots according to a predetermined cycle, the predetermined cycle being prime to the number of a plurality of frequency bands; and
receiving a signal from the communication apparatus using the set frequency band.
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Abstract
The invention provides a frequency hopping method for switching a hopping carrier frequency in a predetermined hopping pattern based on a hopping carrier table, in which there is provided intermittent receiving means for starting carrier frequency designating means every constant cycle to give a command for receiving the control channels of opposed radio base stations. In the case in which a hopping order in a hopping carrier table is skipped by n to carry out switching every intermittent receiving cycle in an intermittent receiving operation, an intermittent receiving cycle is set in such a manner that the n and a total number m of hopping carrier frequencies in the hopping carrier table have a prime relationship with each other.
Moreover, the electric field strength of a carrier frequency in a spare carrier list is measured by the intermittent receiving operation and an interference counter of a spare carrier is increased or decreased corresponding to a frequency at which the electric field strength exceeds a predetermined threshold, and a carrier frequency deleted from a hopping pattern is set to have the worst value as the initialized value of the interference counter. A standby is maintained in a state of a non-exchange until the frequency at which an electric field strength measured for the frequency exceeds a threshold is sufficiently reduced, and the same frequency is recycled as an exchangeable carrier frequency after sufficiently confirming that a communication can be carried out.
64 Citations
10 Claims
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1. A communication method for performing frequency hopping using a plurality of slots, the communication method comprising:
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communication including; setting, among a plurality of frequency bands, a frequency band according to each of the plurality of slots; and performing communication with a communication apparatus using the set frequency band; standby including; setting, among the plurality of frequency bands, the frequency band according to each of the plurality of slots by skipping at least one slot among the plurality of slots according to a predetermined cycle, the predetermined cycle being prime to the number of a plurality of frequency bands; and receiving a signal from the communication apparatus using the set frequency band. - View Dependent Claims (2, 3, 4, 5)
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6. A method for performing communication, the method including a communication state and a standby state, the method comprising the following steps:
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in the communication state, setting, among a plurality of hopping carrier frequencies, a frequency band corresponding to each of a plurality of slots in a cycle based on frequency hopping, the cycle being repeated in the communication; and performing communication with the communication apparatus using the hopping carrier frequencies; in the standby state, selecting the slot in the cycles so as to skip at least one slot from a present cycle to a next cycle, the number of the cycles and the number of hopping carrier frequencies being set to have a prime relationship; and receiving a signal from the communication apparatus using the selected slot in the standby state. - View Dependent Claims (7, 8, 9, 10)
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Specification