Proximity discovery, authentication and link establishment between mobile devices in 3GPP LTE
First Claim
1. A method for proximity discovery between a source device and one or more target devices, the method comprising:
- receiving in the source device a first data comprising an identifier, wherein the identifier is a temporary broadcast identifier;
receiving in the one or more target devices a second data comprising a first representation of the identifier;
broadcasting by the source device a signal comprising a second representation of the identifier;
receiving in the one or more target devices the signal; and
comparing in the one or more target devices the first representation of the identifier with the second representation of the identifier to obtain a comparison result for establishing a successful proximity discovery.
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Abstract
The invention enables a device to discover one or more other devices within range for a device-to-device mode of communication. This proximity discovery may trigger a target device, e.g. to start listening to signals from a source device or perform any other action based on the proximity discovery like e.g. charging at a toll gate. A source device that wants to be discovered broadcasts a message including an identifier or a representation of the identifier. This identifier may be an identifier of the target device to be contacted or of the source device or a derivation thereof or a common security association used by a set of peers. The target device compares the broadcast identifier with a known identifier to establish proximity discovery.
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Citations
17 Claims
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1. A method for proximity discovery between a source device and one or more target devices, the method comprising:
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receiving in the source device a first data comprising an identifier, wherein the identifier is a temporary broadcast identifier; receiving in the one or more target devices a second data comprising a first representation of the identifier; broadcasting by the source device a signal comprising a second representation of the identifier; receiving in the one or more target devices the signal; and comparing in the one or more target devices the first representation of the identifier with the second representation of the identifier to obtain a comparison result for establishing a successful proximity discovery. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A source device configured for performing a proximity discovery procedure with one or more target devices, the source device comprising:
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one or more processors and instructions stored in memory that when executed by the one or more processors cause the source device to carry out operations including; receiving a first data comprising an identifier, wherein the identifier is a temporary broadcast identifier; broadcasting a signal comprising a second representation of the identifier to the one or more target devices, wherein a second data comprising a first representation of the identifier is received in the one or more target devices, and wherein the one or more target devices are configured to receive the broadcasted signal and compare the first representation of the identifier with the second representation of the identifier to obtain a comparison result for establishing a successful proximity discovery. - View Dependent Claims (14)
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15. A target device configured for performing a proximity discovery procedure with a source device, the target device comprising:
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one or more processors and instructions stored in memory that when executed by the one or more processors cause the target device to carry out operations including; receiving a second data comprising a first representation of an identifier, wherein a first data comprising the identifier is received by the source device, and wherein the identifier is a temporary broadcast identifier; receiving a signal broadcast by the source device, the signal comprising a second representation of the identifier; and comparing the first representation of the identifier with the second representation of the identifier to obtain a comparison result for establishing a successful proximity discovery. - View Dependent Claims (16)
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17. A network comprising:
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a source device configured for;
receiving a first data comprising an identifier, wherein the identifier is a temporary broadcast identifier; anda target device configured for;
receiving a second data comprising a first representation of the identifier, receiving the broadcasted signal, and comparing the first representation of the identifier with the second representation of the identifier to obtain a comparison result for establishing a successful proximity discovery.
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Specification