Scheduling wireless device-to-device communications
First Claim
1. A method performed by a radio access node, the method comprising:
- the radio access node transmitting Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) which specifies(i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal; and
(ii) radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment for use by the first wireless terminal in D2D communication with the second wireless terminal; and
the radio access node encoding a cyclical redundancy check (CRC) portion of the DCI with a D2D radio network temporary identity (RNTI) of the first wireless terminal.
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Accused Products
Abstract
A radio access node (22) which communicates over a radio interface (24) with a first wireless terminal (261). The radio access node (22) generates a device-to-device (D2D) grant (54) which specifies radio resources that the first wireless terminal (261) is permitted to use for device-to-device (D2D) communication with a second wireless terminal (second wireless terminal 262). The radio access node (22) transmits the subframe (S) including the D2D grant (54) to the first wireless terminal (261). The first wireless terminal (261) transmits data (56) to the second wireless terminal using radio resources permitted by the D2D grant. In an example embodiment and mode the D2D grant is included in a downlink control channel such as PDCCH; in another example embodiment and mode the D2D grant is included in a downlink shared channel (PDSCH).
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Citations
21 Claims
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1. A method performed by a radio access node, the method comprising:
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the radio access node transmitting Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) which specifies (i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal; and (ii) radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment for use by the first wireless terminal in D2D communication with the second wireless terminal; and the radio access node encoding a cyclical redundancy check (CRC) portion of the DCI with a D2D radio network temporary identity (RNTI) of the first wireless terminal. - View Dependent Claims (2, 3, 4)
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5. A method performed by a wireless terminal, the method comprising:
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the wireless terminal receiving Downlink Control Information (DCI) on a Physical Downlink Control Channel (PDCCH) which specifies (i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal (ii) and radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment; the first wireless terminal performing transmission of the scheduling assignment to the second wireless terminal using the specified radio resources for transmission of the scheduling assignment; and the first wireless terminal performing transmission of the D2D data to the second wireless terminal using the specified radio resources for transmission of the D2D data. - View Dependent Claims (6, 7, 8, 9)
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10. A radio access node of a communications network comprising:
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a processor configured; to generate Downlink Control Information (DCI) on the Physical Downlink Control Channel (PDCCH) which specifies (i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal and (ii) radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment for use by the first wireless terminal for device-to-device (D2D) communication with the second wireless terminal; to encode a cyclical redundancy check (CRC) portion of the Downlink Control Information (DCI) with a D2D radio network temporary identity (RNTI) of the first wireless terminal to specify that the D2D grant is directed to the first wireless terminal; a transmitter adapted to transmit the DCI to the first wireless terminal over a radio interface. - View Dependent Claims (11, 12, 13)
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14. A wireless terminal comprising:
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a receiver configured to receive a Physical Downlink Control Channel (PDCCH) over a radio interface; a processor configured to obtain Downlink Control Information (DCI) on the Physical Downlink Control Channel (PDCCH) which specifies (i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal and (ii) radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment for use by the first wireless terminal in performing device-to-device (D2D) communication with the second wireless terminal; and a transmitter configured to perform transmission of the scheduling assignment to the second wireless terminal using the specified radio resources for transmission of the scheduling assignment and perform transmission of the D2D data to the second wireless terminal using the specified radio resources for transmission of the D2D data. - View Dependent Claims (15, 16, 17, 18)
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19. A method in a wireless terminal comprising:
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receiving a Physical Downlink Control Channel (PDCCH) over a radio interface; obtaining Downlink Control Information (DCI) on the Physical Downlink Control Channel (PDCCH) which specifies (i) radio resources for transmission of a scheduling assignment that is transmitted from a first wireless terminal to a second wireless terminal and (ii) radio resources for transmission of device-to-device (D2D) data that is scheduled by the scheduling assignment for use by the first wireless terminal in performing device-to-device (D2D) communication with the second wireless terminal; performing transmission of the scheduling assignment to the second wireless terminal using the specified radio resources for transmission of the scheduling assignment; and performing transmission of the D2D data to the second wireless terminal using the specified radio resources for transmission of the D2D data. - View Dependent Claims (20, 21)
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Specification