Radio communication method and radio communication device
First Claim
1. A radio communication device in whose communication area other radio communication devices operate, comprising:
- a detection section that detects a number of the other radio communication devices within the communication area of the radio communication device during a time slot, the time slot being used by the radio communication device, and the other radio communication devices operating during the time slot being used by the radio communication device; and
a contention resolution section that performs contention resolution processing when the detection section detects one or more of the other radio communication devices operating during the time slot being used by the radio communication device,said contention resolution section comprising;
a time slot dividing section that divides the time slot into a plurality of divided time slots, anda slot setting section that sets at least one of the plurality of divided time slots as a time slot to be used by the radio communication device,wherein a number of the plurality of divided time slots is 2M where M is an integer, and 2M-1≦
N<
2M is satisfied where N is the detected number of the other communication devices.
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Accused Products
Abstract
The present invention discloses a technique for avoiding a signal collision in a wireless medium to improve communication throughput. According to this technique, in a radio communication system composed of a plurality of radio communication devices in such a manner that other radio communication devices exist within the communication area of a radio communication device, a given radio communication device is assigned a time slot periodically so that it can access the wireless medium in the time slot at higher priority than the other radio communication devices. This is achieved as follows: The radio communication device monitors the wireless medium, detects other radio communication devices operating within the communication area of the radio communication device, and divide communication time on the wireless medium into time slots of equal width according to the number of other radio communication devices. Then, each radio communication device selects one of these time slots so as not to share the selected time slot with any other radio communication device, and uses a waiting time shorter than those of the other radio communication devices to access the wireless medium in the selected time slot.
12 Citations
10 Claims
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1. A radio communication device in whose communication area other radio communication devices operate, comprising:
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a detection section that detects a number of the other radio communication devices within the communication area of the radio communication device during a time slot, the time slot being used by the radio communication device, and the other radio communication devices operating during the time slot being used by the radio communication device; and a contention resolution section that performs contention resolution processing when the detection section detects one or more of the other radio communication devices operating during the time slot being used by the radio communication device, said contention resolution section comprising; a time slot dividing section that divides the time slot into a plurality of divided time slots, and a slot setting section that sets at least one of the plurality of divided time slots as a time slot to be used by the radio communication device, wherein a number of the plurality of divided time slots is 2M where M is an integer, and 2M-1≦
N<
2M is satisfied where N is the detected number of the other communication devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A radio communication method being performed by a radio communication device in whose communication area other radio communication devices operate, comprising:
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detecting a number of the other radio communication devices within the communication area of the radio communication device during a time slot, the time slot being used by the radio communication device, and the other radio communication devices operating during the time slot being used by the radio communication device; and performing contention resolution processing when the radio communication device detects one or more of the other radio communication devices operating during the time slot being used by the radio communication device, wherein the radio communication device divides the time slot into a plurality of divided time slots, and sets at least one of the plurality of divided time slots as a time slot to be used by the radio communication device, and wherein a number of the plurality of divided time slots is 2M where M is an integer, and 2M-1≦
N<
2M is satisfied where N is the detected number of the other communication devices. - View Dependent Claims (10)
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Specification