Methods and devices for allocating resources in device-to-device communication
First Claim
Patent Images
1. A method in a base station of a wireless network, the base station in communication with at least a first mobile station and a second mobile station the method comprising:
- allocating, in the base station, a first radio resource for a Device-to-Device (“
D2D”
) group, wherein the D2D group comprises the first mobile station and the second mobile station;
generating, in the base station, a control message, wherein the control message indicates that the first mobile station should transmit using the first radio resource and the second mobile station should receive using the first radio resource, wherein generating the control message comprises;
generating a control message that includes a bitmap, wherein the bitmap incudes a first grant-indicator bit for the first mobile station and a second grant-indicator bit for the second mobile station;
setting the first grant-indicator bit to a transmit vale that indicates that the first mobile station should transmit using the first radio resource; and
setting the second grant-indicator bit to a receive value to indicate that the second mobile station should receive using the first radio resource; and
sending, by the base station, the control message to the first and second mobile stations.
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Abstract
This disclosure sets forth methods and devices for allocating resources in Device-to-Device (“D2D”) communications in which a base station sends a control message containing a D2D resource allocation (e.g., the identity of resource blocks and subframes that can be used for D2D) and a bitmap. The bitmap contains grant-indicator bits that tell each mobile station within the D2D group whether it is permitted to receive or transmit using the allocated D2D resources.
22 Citations
18 Claims
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1. A method in a base station of a wireless network, the base station in communication with at least a first mobile station and a second mobile station the method comprising:
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allocating, in the base station, a first radio resource for a Device-to-Device (“
D2D”
) group, wherein the D2D group comprises the first mobile station and the second mobile station;generating, in the base station, a control message, wherein the control message indicates that the first mobile station should transmit using the first radio resource and the second mobile station should receive using the first radio resource, wherein generating the control message comprises; generating a control message that includes a bitmap, wherein the bitmap incudes a first grant-indicator bit for the first mobile station and a second grant-indicator bit for the second mobile station; setting the first grant-indicator bit to a transmit vale that indicates that the first mobile station should transmit using the first radio resource; and setting the second grant-indicator bit to a receive value to indicate that the second mobile station should receive using the first radio resource; and sending, by the base station, the control message to the first and second mobile stations. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A base station of a wireless network, the base station comprising:
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a processor; and a non-transitory memory; wherein the base station is configured to allocate a first radio resource for a Device-to-Device (“
D2D ”
) group;wherein the D2D group comprises a first mobile station and a second mobile station; wherein the base station is configured to generate a control message; wherein the control message indicates that the first mobile station should transmit using the first radio resource; wherein the control message indicates that the second mobile station should receive using the first radio resource; wherein the control message includes a bitmap, wherein; the bitmap includes a first grant-indicator bit for the first mobile station and a second grant-indicator bit for the second mobile station; wherein the first grant-indicator bit is set to a transmit value that indicates that the first mobile station should transmit using the first radio resource; and wherein the second grant-indicator bit is set to a receive value to indicate that the second mobile station should receive using the first radio resource; and wherein the base station is configured to send the control message to the first and second mobile stations.
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9. A method in a first mobile station for a wireless network, the method comprising:
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determining whether data for direct transmission to at least one second mobile station are available; transmitting a scheduling request to a base station of the wireless network if data are available; receiving a first control message from the base station that indicates an uplink grant in response to the scheduling request; generating a buffer status report that indicates an amount of the data for direct transmission; transmitting the buffer status report to the base station; receiving a second control message from the base station indicating a D2D grant in response to the buffer status report, wherein the second control message indicates a radio resource of the base station allocated for mobile stations of a D2D group that includes the mobile station, grant-indication information that indicates which mobile stations of the D2D group are allowed to transmit using the radio resource and which mobile stations of the D2D group are required to receive using the radio resource. wherein the grant-indication information comprises a bitmap with a grant-indicator bit for each mobile station of the D2D group; selecting a portion of the grant-indication information that corresponds to the mobile station comprising selecting grant-indicator bit that corresponds to the mobile station; determining whether to transmit or receive using the radio resource based on the selected portion of the grant-indication information comprising determining whether the selected grant-indicator bit is a transmit value or a receive value, wherein the second control message indicates that the first mobile station should transmit using the first radio resource, wherein the second control message indicates that the second mobile station should receive using the first radio resource; and transmitting the data to the at least one second mobile station according to the D2D grant of the second control message. - View Dependent Claims (10, 11)
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12. A method in a mobile station for a wireless network, the method comprising:
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receiving a control message from a base station of the wireless network, wherein the control message indicates a radio resource of the base station allocated for mobile stations of a D2D group that includes the mobile station, grant-indication information that indicates which mobile stations of the D2D group are allowed to transmit using the radio resource and which mobile stations of the D2D group are required to receive using the radio resource, wherein the grant-indication information comprises a bitmap with a grant-indicator bit for each mobile station of the D2D group; selecting a portion of the grant-indication information that corresponds to the mobile station comprising selecting the grant-indicator bit that corresponds to the mobile station; determining whether to transmit or receive using the radio resource based on the selected portion of the grant-indication information comprises determining whether the selected grant-indicator bit is a transmit value or a receive value; and transmitting or receiving using the allocated radio resource based on the determination of whether to transmit or receive. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification