Apparatus and method to enable device-to-device (D2D) discovery in cellular networks
First Claim
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1. User equipment comprising processing circuitry to couple the user equipment to a second user equipment (dUE2) in a device-to-device (D2D) configuration, wherein the processing circuitry is arranged to:
- receive control channel information regarding the dUE2 from an evolved Node B (eNB) for a D2D connection;
measure signal strength information from an uplink control channel transmitted by the dUE2;
transmit the signal strength information to the eNB; and
in response to transmission of the signal strength information, receive from the eNB allocation of a set of resources for D2D use by the UE and the dUE2 based on the signal strength information, the set of resources comprising a corrected modulation and coding scheme (MCS) at corrected transmission power for D2D use by the UE and dUE2 in response to the signal strength information indicating a particular MCS to use for D2D use by the UE and dUE2, wherein the allocation of the set of resources from the eNB is unreceived in response to the signal strength information failing to indicate a usable MCS for D2D use by the UE and dUE2.
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Abstract
An apparatus and method of allowing user equipment (UE) to transmit information directly with other user equipment, using a device-to-device (D2D) mode is disclosed herein. A D2D UE (dUE1) that wishes so communicate to another UE (dUE2) in D2D mode makes various communications requests to an Evolved Node B (eNB), which can facilitate the connection between dUE1 and dUE2 by having the dUE1 measure the signals from dUE2 to help establish a D2D connection between the dUE1 and the dUE2.
13 Citations
24 Claims
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1. User equipment comprising processing circuitry to couple the user equipment to a second user equipment (dUE2) in a device-to-device (D2D) configuration, wherein the processing circuitry is arranged to:
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receive control channel information regarding the dUE2 from an evolved Node B (eNB) for a D2D connection; measure signal strength information from an uplink control channel transmitted by the dUE2; transmit the signal strength information to the eNB; and in response to transmission of the signal strength information, receive from the eNB allocation of a set of resources for D2D use by the UE and the dUE2 based on the signal strength information, the set of resources comprising a corrected modulation and coding scheme (MCS) at corrected transmission power for D2D use by the UE and dUE2 in response to the signal strength information indicating a particular MCS to use for D2D use by the UE and dUE2, wherein the allocation of the set of resources from the eNB is unreceived in response to the signal strength information failing to indicate a usable MCS for D2D use by the UE and dUE2. - View Dependent Claims (2, 3, 4, 5, 6, 17, 18, 19, 20, 21, 22)
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7. A method for coupling a first user equipment (dUE1) to a second user equipment (dUE2) in a device-to-device (D2D) cluster operating within a Long Term Evolution (LTE) cell, said method comprising:
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receiving a request from the dUE1 to communicate with the dUE2 in a D2D cluster; sending first information to the dUE1 regarding allocation information for a Physical Uplink Control Channel (PUCCH) of the dUE2; receiving second information from the dUE1 regarding communications between the eNB and the dUE2 based on the first information; determining whether the second information indicates a usable modulation and coding scheme (MCS) to use for D2D use by the dUE1 and dUE2; allocating a set of resources for D2D use by the dUE1 and the dUE2 based on the first and second information the set of resources determined by estimating a corrected MCS and corrected transmission power for D2D use by the dUE1 and dUE2 in response to determining that the second information indicates a particular MCS to use for D2D use by the dUE1 and dUE2, and refraining from allocating the set of resources in response to a determination that the second information fails to indicate a usable MCS for D2D use by the dUE1 and dUE2; and transmitting information regarding the set of resources to both the dUE1 and the dUE2. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An evolved Node B (eNB) comprising:
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a transceiver; and processing circuitry adapted to; receive a request from a first user equipment (dUE1) to communicate with a second user equipment (dUE2) in a device to device (D2D) cluster; send first information to the dUE1 regarding allocation information for a Physical Uplink Control Channel (PUCCH) of the dUE2; receive second information from the dUE1 regarding communications between the eNB and the dUE2 based on the first information; determine whether the second information indicates a modulation and coding scheme (MCS) to use for D2D; allocate a set of resources for D2D use by the dUE1 and the dUE2 based on the second information, the allocation comprising a corrected MCS and corrected transmission power for D2D use by the dUE1 and dUE2 in response to a determination that the second information indicates an MCS to use for D2D use by the dUE1 and dUE2, and refrain from allocation of the set of resources and transmission of the information regarding the set of resources in response to a determination that the second information fails to indicate a MCS for D2D use by the dUE1 and dUE2; and transmit information regarding the set of resources to both the dUE1 and the dUE2, wherein said information regarding the set of resources enables the dUE1 and the dUE2 to send and receive communications in a D2D mode. - View Dependent Claims (15, 16)
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23. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of an evolved NodeB (eNB) to communicate with user equipment (UE), the one or more processors to configure the eNB to:
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receive a request from the dUE1 to communicate with the dUE2 in a D2D cluster; send first information to the dUE1 regarding allocation information for a Physical Uplink Control Channel (PUCCH) of the dUE2; receive second information from the dUE1 regarding communications between the eNB and the dUE2 based on the first information; determine whether the second information indicates a usable modulation and coding scheme (MCS) to use for D2D use by the dUE1 and dUE2, allocate a set of resources for D2D use by the dUE1 and the dUE2 based on the first and second information, the set of resources determined by estimating a corrected MCS and corrected transmission power for D2D use by the dUE1 and dUE2 in response to determining that the second information indicates a particular MCS to use for D2D use by the dUE1 and dUE2, and refraining from allocating the set of resources in response to a determination that the second information fails to indicate a usable MCS for D2D use by the dUE1 and dUE2; and transmit information regarding the set of resources to both the dUE1 and the dUE2. - View Dependent Claims (24)
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Specification