Ratio resource sharing and contention scheme for device-to-device communication in white space spectrum bands
First Claim
1. A method for resource sharing between user terminals in device-to-device communications, comprising:
- obtaining, at a user terminal, frequency and timing synchronization with adjacent user terminals, through at least one of downlink and uplink synchronization with a base station operating in licensed bands;
receiving, at the user terminal, a primary or secondary synchronization signal from the base station to synchronize frequency and timing with the adjacent user terminals;
establishing a device-to-device communication in a white space band;
partitioning a radio spectrum for device-to-device communication into a radio resource grid including a plurality of resource block sets, the radio spectrum being the white space band; and
dividing each resource block set of the plurality of resource block sets in a part of the radio spectrum that is available into a device-to-device common control channel and a device-to-device data channel,wherein the method further includes;
setting a virtual central frequency as a reference for the partitioning of the radio spectrum for device-to-device communication into the radio resource grid;
configuring a size of the resource block sets by the base station, the resource block sets comprising plurality of resource blocks, a resource block set being a partitioning unit of a two-dimensional radio resource grid of time and frequency corresponding to the radio resource grid; and
partitioning the radio resource grid between used, free and unusable radio resources of at least one communication system.
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Accused Products
Abstract
The present invention discloses a method, an apparatus and a computer program for resource contention in device-to-device communication links. The method partitions the time-frequency radio resource grid with a resource block set forming the resource unit in the grid, for all available, used and unusable frequency bands around a given virtual central frequency. Each resource block set is partitioned into a common control channel and a data channel. With a given procedure of control data transmission between transmitting and receiving user terminals, the resources are competed and shared. Frequency shifting with short distance frequency change or frequency transference with a larger frequency hopping into a free radio resource is available. The competition procedure is done in order to fairly share the frequency bands as a function of time between different device-to-device communication links in a localized manner.
16 Citations
16 Claims
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1. A method for resource sharing between user terminals in device-to-device communications, comprising:
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obtaining, at a user terminal, frequency and timing synchronization with adjacent user terminals, through at least one of downlink and uplink synchronization with a base station operating in licensed bands; receiving, at the user terminal, a primary or secondary synchronization signal from the base station to synchronize frequency and timing with the adjacent user terminals; establishing a device-to-device communication in a white space band; partitioning a radio spectrum for device-to-device communication into a radio resource grid including a plurality of resource block sets, the radio spectrum being the white space band; and dividing each resource block set of the plurality of resource block sets in a part of the radio spectrum that is available into a device-to-device common control channel and a device-to-device data channel, wherein the method further includes; setting a virtual central frequency as a reference for the partitioning of the radio spectrum for device-to-device communication into the radio resource grid; configuring a size of the resource block sets by the base station, the resource block sets comprising plurality of resource blocks, a resource block set being a partitioning unit of a two-dimensional radio resource grid of time and frequency corresponding to the radio resource grid; and partitioning the radio resource grid between used, free and unusable radio resources of at least one communication system. - View Dependent Claims (2, 3, 4, 5)
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6. A user terminal that shares resources with other user terminals in device-to-device communications, comprising:
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circuitry including a processor connected to a memory and configured to; obtain frequency and timing synchronization with adjacent user terminals, through at least one of downlink and uplink synchronization with a base station operating in licensed bands; receive a primary or secondary synchronization signal from the base station to synchronize frequency and timing with the adjacent user terminals; establish a device-to-device communication in a white space band, wherein a radio spectrum for device-to-device communication is partitioned into a radio resource grid including a plurality of resource block sets, the radio spectrum being the white space band; and each resource block set of the plurality of resource block sets in a part of the radio spectrum that is available is partitioned into a device-to-device common control channel and a device-to-device data channel, wherein a virtual central frequency is set as a reference for the partitioning of the radio spectrum for device-to-device communication into the radio resource grid; a size of the resource block sets is set by the base station, the resource block sets comprising plurality of resource blocks, a resource block set being a partitioning unit of a two-dimensional radio resource grid regarding time and frequency corresponding to the radio resource grid; and the radio resource grid is partitioned between used, free and unusable radio resources of at least one communication system. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A non-transitory computer readable medium comprising computer readable instructions that, when executed by circuitry, causes the circuitry to perform steps for resource sharing between user terminals in device-to-device communications, the steps comprising:
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obtaining, at a user terminal, frequency and timing synchronization with adjacent user terminals, through at least one of downlink and uplink synchronization with a base station operating in licensed bands; receiving, at the user terminal, a primary or secondary synchronization signal from the base station to synchronize frequency and timing with the adjacent user terminals; establishing a device-to-device communication in a white space band; partitioning a radio spectrum for device-to-device communication into a radio resource grid including a plurality of resource block sets, the radio spectrum being the white space band; dividing each resource block set of the plurality of resource block sets in a part of the radio spectrum that is available into a device-to-device common control channel and a device-to-device data channel; setting a virtual central frequency as a reference for the partitioning of the radio spectrum for device-to-device communication into the radio resource grid; configuring a size of the resource block sets by the base station, the resource block sets comprising plurality of resource blocks, a resource block set being a partitioning unit of a two-dimensional radio resource grid of time and frequency corresponding to the radio resource grid; and partitioning the radio resource grid between used, free and unusable radio resources of at least one communication system.
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Specification