Method of spatial band reuse in a multi-band communication system
First Claim
1. A control method of band multiplexing communications from a plurality of devices in the communication system, a rotation being established, by each device, between or among a plurality of frequency bands for transmission, the method comprising the steps of:
- a) transmitting a symbol set from each of the plurality of devices in the communication system in each of the established transmission frequency bands;
b) detecting, by at least one device of the plurality of devices, respective starting times of symbol sets for the other devices transmitting in the communication system for one of the plurality of frequency bands;
c) selecting, by the at least one device, a starting time of a symbol set based on the detected starting times of symbol sets for the other devices, selected start times limiting interference between symbol sets transmitted by the at least one device and the symbol sets transmitted by the other devices to less than a threshold level; and
d) adjusting, by the at least one device, the starting time in subsequent transmissions of respective symbols for each of the established transmission frequency bands based on the selected starting time in step (c).
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Abstract
A method of band multiplexing communications from a plurality of devices includes a rotation being established, by each device, between or among a plurality of frequency bands for transmission. A symbol set is transmitted from each device in each of the established transmission frequency bands and one device detects respective starting times of symbol sets for the other devices transmitting for one of the plurality of frequency bands. A starting time of a symbol set for the one device is selected based on the detected starting times for the other devices such that the selected start times limit interference between symbol sets transmitted by the one device and symbol sets transmitted by the other devices to less than a threshold level. The starting time of respective symbols is adjusted by the one device in subsequent transmissions for each of the established transmission frequency bands based on the selected starting time.
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Citations
26 Claims
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1. A control method of band multiplexing communications from a plurality of devices in the communication system, a rotation being established, by each device, between or among a plurality of frequency bands for transmission, the method comprising the steps of:
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a) transmitting a symbol set from each of the plurality of devices in the communication system in each of the established transmission frequency bands;
b) detecting, by at least one device of the plurality of devices, respective starting times of symbol sets for the other devices transmitting in the communication system for one of the plurality of frequency bands;
c) selecting, by the at least one device, a starting time of a symbol set based on the detected starting times of symbol sets for the other devices, selected start times limiting interference between symbol sets transmitted by the at least one device and the symbol sets transmitted by the other devices to less than a threshold level; and
d) adjusting, by the at least one device, the starting time in subsequent transmissions of respective symbols for each of the established transmission frequency bands based on the selected starting time in step (c). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 26)
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9. A control method of band multiplexing communications from a plurality of devices in a communication system, a rotation being established, by each device, between or among a plurality of frequency bands for transmission, the method comprising the steps of:
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a) transmitting a symbol set from at least one respective device of the plurality of devices in each of the established transmission frequency bands;
b) detecting, by a further device of the plurality of devices, the starting times of symbol sets for one of the plurality of frequency bands for each of the at least one respective devices transmitting in the communication system;
c) determining by the further device whether to transmit using the plurality of frequency bands according to the detected starting times of symbol sets for each of the at least one respective devices transmitting on the plurality of frequency bands; and
d) responsive to the further device determining in step (c) to transmit, selecting by the further device a starting time of a symbol set for the one frequency band used for detection in step (b) such that overlap of symbol set periods for the further device and each of the at least one respective devices transmitting is limited to less than a predetermined threshold level. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17)
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18. A control method of band multiplexing communications from a plurality of devices in a communication system, a rotation being established, by each device, between or among a plurality of frequency bands in a frequency band group for transmission, the communication system including a plurality of frequency band groups, the method comprising the steps of:
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a) transmitting a symbol set from at least one respective device of the plurality of devices in a respective frequency band group of the plurality of frequency band groups in each of the established transmission frequency bands;
b) detecting, by a further device of the plurality of devices, the starting times of symbol sets of the at least one respective device for one frequency band of the plurality of frequency bands in the respective frequency band group;
c) determining, by the further device, whether to transmit using the one respective frequency band group according to the detected starting times of symbol sets of the at least one respective device transmitting on the one frequency band in the one respective frequency band group;
d) responsive to the further device determining in step (c) not to transmit using the one respective frequency band group, repeating steps (b) and (c) until the further device determines that a further one of the plurality of frequency band groups is to be used for transmission of symbol sets; and
e) responsive to the further device determining in step (d) to transmit using the further one of the plurality of frequency band groups, selecting, by the further device, a starting time of a symbol set for a respective frequency band of the further one of the plurality of frequency band groups such that overlap of symbol set periods of symbol sets for the further one of the plurality of frequency bands is limited to less than a predetermined threshold period. - View Dependent Claims (19, 20, 21, 22, 23, 24)
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25. A device for communicating with at least one other device, comprising:
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a processor for establishing the rotation between or among a plurality of frequency bands;
a transmitter for transmitting a symbol set in each of the established transmission frequency bands; and
a receiver for detecting respective starting times of transmitted symbol sets from the at least one other device for one of the plurality of frequency bands, wherein the processor selects a starting time of a symbol set to be transmitted based on the detected starting times of symbol sets of the at least one other device, and controls the adjustment of the starting time by the transmitter in subsequent transmissions of respective symbols for each of the established transmission frequency bands based on the selected starting time, the selected start time being selected to limit interference between symbol sets transmitted by the device and the symbol sets transmitted by the at least one other device to less than a threshold level.
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Specification