Resource allocation method for d2d communications, base station using the same, and user equipment using the same

A resource allocation method for device to device (D2D) communications of a plurality of user equipments (UEs), the method comprises:

• determining frequency index and time index of each of the resource groups in a time-frequency domain for each of a plurality of resource patterns, and the frequency index and the time index fulfil the following conditions:
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• wherein gl(k) and il(k) are the frequency index and the time index of the lth resource group in the kth resource pattern, respectively;
• M is the number of frequency indices, N is the number of time indices for resource groups to reside in each of the plurality of resource patterns, and L is the number of UE groups in each of the plurality of resource patterns.

A resource allocation method for device to device (D2D) communications of a plurality of user equipments (UEs), the method comprises:

• determining frequency index and time index of each of resource groups in a time-frequency domain for each of the plurality of resource patterns, and the frequency index and the time index fulfil the following conditions:
• gl(k)=(gl(0)+p·k mod M)mod M
• il=(k)=(il(0)+q·k·(gl(0)+r)mod N)mod N
• , wherein k is index of the plurality of resource patterns, M is the number of occupying spectra of the resource groups in each of the plurality of resource patterns, N is the number of time periods of the resource groups in each of the plurality of resource patterns, p is a positive integer which is relatively prime with M, q is a positive integer which is relatively prime with N, r is an integer in the range {0, 1, . . . , N−1}, gl(k) is the frequency index of the lth resource group in the kth resource pattern, il(k) is the time index of the lth resource group in the kth resource pattern.

A base station, comprising

• a transceiver which transmits and receives wireless signals;
• a control circuit to the transceiver and is configured for:
• assigning a plurality of resource patterns, wherein each of the plurality of resource patterns comprises resource groups, and each of the resource groups comprises resource blocks;
• determining frequency index and time index of each of the resource groups in a time-frequency domain of each of the plurality of resource patterns, and there exists at least one of the plurality of resource patterns such that the time index of a first resource group and the time index of a second group are different;
• and
• assigning the resource groups of each of the plurality of resource patterns to a plurality of UEs respectively according to the frequency index and the time index of each of the resource groups in the time-frequency domain of each of the plurality of resource patterns.

A base station, comprising

• a transceiver which transmits and receives wireless signals;
• a control circuit to the transceiver and is configured for:
• assigning a plurality of resource patterns, wherein each of the plurality of resource patterns comprises resource groups, and each of the resource groups comprises resource blocks;
• determining frequency index and time index of each of the resource groups in a time-frequency domain of each of the plurality of resource patterns, and the frequency index and the time index fulfil the following conditions:
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• wherein gl(k) and il(k) are the frequency index and the time index of the lth resource group in the kth resource pattern, respectively;
• M is the number of frequency indices, N is the number of time indices for resource groups to reside in each of the plurality of resource patterns, and L is the number of UE groups in each of the plurality of resource patterns.

A base station, comprising

• a transceiver which transmits and receives wireless signals;
• a control circuit to the transceiver and is configured for:
• assigning a plurality of resource patterns, wherein each of the plurality of resource patterns comprises resource groups, and each of the resource groups comprises resource blocks;
• determining frequency index and time index of each of resource groups in a time-frequency domain for each of the plurality of resource patterns, and the frequency index and the time index fulfil the following conditions:
• gl(k)=(gl(0)+p·k mod M)mod M
• il(k)=(il(0)+q·k·(gl(0)+r)mod N)mod N
• , wherein k is index of the plurality of resource patterns, M is the number of occupying spectra of the resource groups in each of the plurality of resource patterns, N is the number of time periods of the resource groups in each of the plurality of resource patterns, p is a positive integer which is relatively prime with M, q is a positive integer which is relatively prime with N, r is an integer in the range {0, 1, . . . , N−1}, gl(k) is the frequency index of the lth resource group in the kth resource pattern, il(k) is the time index of the lth resource group in the kth resource pattern.

A user equipment, comprising

• a transceiver which transmits and receives wireless signals;
• a control circuit to the transceiver and is configured for:
• determining frequency index and time index of each of the resource groups in a time-frequency domain of each of the plurality of resource patterns, and the frequency index and the time index fulfil the following conditions
• gl(k)=(gl(0)+p·k mod M)mod M
• il(k)=(il(0)+q·k·(gl(0)+r)mod N)mod N
• , wherein k is index of the plurality of resource patterns, M is the number of occupying spectra of the resource groups in each of the plurality of resource patterns, N is the number of time periods of the resource groups in each of the plurality of resource patterns, p is a positive integer which is relatively prime with M, q is a positive integer which is relatively prime with N, r is an integer in the range {0, 1, . . . , N−1}, gl(k) is the frequency index of the lth resource group in the kth resource pattern, il(k) is the time index of the lth resource group in the kth resource pattern.