Methods and arrangements for device discovery
First Claim
1. A method executed in a second wireless terminal for discovering a first wireless terminal, wherein the second wireless terminal is configured with a set of one or more identities of wireless terminals with which device-to-device (D2D) communication is possible, the method comprising:
- detecting a control signal transmitted from the first wireless terminal, wherein the control signal carries an identity;
decoding the control signal; and
for each identity in the set, executing the following steps until all the identities in the set have been selected or until a match is found;
hashing a reference control signal comprising the identity from the set, taking a time stamp used for the control signal transmission as one input parameter of the hashing function, anddetermining whether the output signal of the hashing matches the decoded control signal.
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Accused Products
Abstract
The present disclosure relates to methods and devices for transmission of discovery signal signals and detection of discovery signal signals for device-to-device communication. According to some aspects, the disclosure relates to a method executed in a second wireless terminal for discovering a first wireless terminal, wherein the second wireless terminal 20 is configured with a set of one or more identities of wireless terminals with which device-to-device, D2D, communication is possible. The method comprises the following steps detecting a control signal transmitted from the first wireless terminal, wherein the control signal carries an identity and decoding S13 the received signal. The wireless terminal then, for each identity in the set, hashes S14 a reference control signal comprising an identity of the wireless terminal, taking a time stamp used for the control signal transmission as one input parameter of the hashing function and determines S15 if an output signal of the hashing matches the decoded signal, until all the identities in the set have been selected or until a match is found.
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Citations
14 Claims
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1. A method executed in a second wireless terminal for discovering a first wireless terminal, wherein the second wireless terminal is configured with a set of one or more identities of wireless terminals with which device-to-device (D2D) communication is possible, the method comprising:
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detecting a control signal transmitted from the first wireless terminal, wherein the control signal carries an identity; decoding the control signal; and for each identity in the set, executing the following steps until all the identities in the set have been selected or until a match is found; hashing a reference control signal comprising the identity from the set, taking a time stamp used for the control signal transmission as one input parameter of the hashing function, and determining whether the output signal of the hashing matches the decoded control signal. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A second wireless terminal adapted for discovering a first wireless terminal, wherein the second wireless terminal is configured with a set of one or more identities of wireless terminals with which device-to-device (D2D) communication is possible, the second wireless terminal comprising:
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receiver circuitry adapted to detect a control signal transmitted from the first wireless terminal, wherein the control signal carries an identity; baseband circuitry adapted to decode the control signal; and processing circuitry adapted to, for each identity in the set, repeat the following steps until all the identities in the set have been selected or until a match is found; i. hash a reference control signal comprising the identity from the set, taking a time stamp used for the control signal transmission as one input parameter of the hashing function, and ii. compare an output signal of the hashing with the decoded control signal. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A non-transitory computer-readable medium comprising, stored thereupon, computer readable code that, when run on a wireless terminal configured with a set of one or more identities of wireless terminals with which device-to-device (D2D) communication is possible, causes the wireless terminal to:
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detect a control signal transmitted from another wireless terminal, wherein the control signal carries an identity; decode the control signal; and for each identity in the set, execute the following steps until all the identities in the set have been selected or until a match is found; hashing a reference control signal comprising the identity from the set, taking a time stamp used for the control signal transmission as one input parameter of the hashing function, and determining whether the output signal of the hashing matches the decoded control signal.
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Specification