Method and arrangement for D2D discovery
First Claim
1. A method in a first user equipment (UE) for sending beacon signals, which beacon signals are to be received by a second UE to discover the first UE for Device to Device (D2D) communication, which first UE is comprised in a wireless network, the method comprising:
- receiving from a network node information about a set of available peer discovery resources to be used in a peer discovery frame by the first UE for sending beacon signals, which beacon signals are to be detected by the second UE,obtaining, from the network node, information about a number of registered first UEs within a cell or tracking area associated with the network node,obtaining a beacon transmission probability, which beacon transmission probability is the probability that the first UE transmits a beacon signal in a specific peer discovery frame, and wherein obtaining the beacon transmission probability comprises determining the beacon transmission probability based on a number of available peer discovery resources in the set of available peer discovery resources and a number of active first UEs,at each specific peer discovery frame determining according to the beacon transmission probability, whether or not a beacon signal shall be transmitted during that specific peer discovery frame, andwhen determining to transmit a beacon signal during that specific peer discovery frame, sending the beacon signal by choosing one of the peer discovery resources out of the received set of available peer discovery resources.
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Abstract
A method for sending beacon signals is provided. The beacon signals are to be received by a slave device to discover the master device for Device to Device communication. The master device receives information from a network node. The information informs about a set of available peer discovery resources to be used in a peer discovery frame by the master device for sending beacon signals. The beacon signals are detected by the slave device. The master device obtains a beacon transmission probability. At each specific peer discovery frame, the master device determines according to the beacon transmission probability, whether or not a beacon signal shall be transmitted during that specific peer discovery frame. When determining to transmit a beacon signal during that specific peer discovery frame, master device sends the beacon signal by choosing one of the peer discovery resources out of the received set of available peer discovery resources.
50 Citations
26 Claims
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1. A method in a first user equipment (UE) for sending beacon signals, which beacon signals are to be received by a second UE to discover the first UE for Device to Device (D2D) communication, which first UE is comprised in a wireless network, the method comprising:
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receiving from a network node information about a set of available peer discovery resources to be used in a peer discovery frame by the first UE for sending beacon signals, which beacon signals are to be detected by the second UE, obtaining, from the network node, information about a number of registered first UEs within a cell or tracking area associated with the network node, obtaining a beacon transmission probability, which beacon transmission probability is the probability that the first UE transmits a beacon signal in a specific peer discovery frame, and wherein obtaining the beacon transmission probability comprises determining the beacon transmission probability based on a number of available peer discovery resources in the set of available peer discovery resources and a number of active first UEs, at each specific peer discovery frame determining according to the beacon transmission probability, whether or not a beacon signal shall be transmitted during that specific peer discovery frame, and when determining to transmit a beacon signal during that specific peer discovery frame, sending the beacon signal by choosing one of the peer discovery resources out of the received set of available peer discovery resources. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 23)
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9. A method in a network node for assisting in Device to Device (D2D) discovery, which network node is comprised in a wireless network, the method comprising:
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receiving from respective one or more first user equipments (UEs), a registration that the first UE requests to be detected by a second UE; sending information to the respective one or more first UEs, which information comprises a number of registered first UEs and a set of available peer discovery resources, which set of available peer discovery resources are to be used in a peer discovery frame by the respective one or more first UEs for sending beacon signals, which beacon signals are to be received by second UEs to discover the first UE for D2D communication, the method further comprising determining a beacon transmission probability based on a number of available peer discovery resources in the set of available peer discovery resources and the number of registered first UEs, and which beacon transmission probability is the probability that the first UE transmits a beacon signal in a specific peer discovery frame, sending the beacon transmission probability to the respective one or more first UEs. - View Dependent Claims (10, 11, 24)
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12. A first user equipment (UE) for sending beacon signals, which beacon signals are to be received by a second UE to discover the first UE for Device to Device (D2D) communication, which first UE is comprised in a wireless network, the first UE comprising:
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a receiving circuit configured to receive from a network node information about a set of available peer discovery resources to be used in a peer discovery frame by the first UE for sending beacon signals, which beacon signals are to be detected by the second UE, an obtaining circuit configured to obtain a beacon transmission probability, which beacon transmission probability is the probability that the first UE transmits a beacon signal in a specific peer discovery frame, a sending circuit configured to at each specific peer discovery frame determine according to the beacon transmission probability, whether or not a beacon signal shall be transmitted during that specific peer discovery frame, and when determining to transmit a beacon signal during that specific peer discovery frame, send the beacon signal by choosing one of the peer discovery resources out of the received set of available peer discovery resources, characterized in that the obtaining circuit further is configured to obtain from the network node, information about a number of registered first UEs within a cell or tracking area associated with the network node, and wherein the obtaining circuit further is configured to obtain the beacon transmission probability by determining the beacon transmission probability based on a number of available peer discovery resources in the set of available peer discovery resources and a number of active first UEs. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 25)
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20. A network node for assisting in Device to Device (D2D) discovery, which network node is comprised in a wireless network, the network node comprises:
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a receiving circuit configured to receive from respective one or more first user equipments (UEs), a registration that the first UE requests to be detected by a second UE; a sending circuit configured to send information to the respective one or more first UEs, which information comprises a number of registered second UEs and a set of available peer discovery resources, which set of available peer discovery resources are to be used in a peer discovery frame by the respective one or more first UEs for sending beacon signals, which beacon signals are to be received by second UEs to discover the first UE for D2D communication, characterized in that the network node further comprises a processor configured to determine a beacon transmission probability based on a number of available peer discovery resources in the set of available peer discovery resources and the number of registered first UEs, which beacon transmission probability is the probability that the first UE transmits a beacon signal in a specific peer discovery frame, and wherein the sending circuit further is configured to send the beacon transmission probability to the respective one or more first UEs. - View Dependent Claims (21, 22, 26)
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Specification