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US 10,897,766 B2Granted
Scrambling of physical channels and reference signals in wireless communication networks
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsStefan Parkvall, Robert Baldemair, Claes Tidestav, Mattias Frenne
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Abstract
Radio network nodes, wireless devices, and related methods are provided in which a pseudo-random sequence initialization value, which is used during the generation of pseudo-random and/or scrambling sequences, is based, at least in part, on a first identifier, wherein the first identifier is equal to a first parameter if the first parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier.
Claims16
A method in a radio network node, the method comprising:
- obtaining a pseudo-random sequence initialization value, the pseudo-random sequence initialization value being based, at least in part, on a first identifier, the first identifier equaling a scrambling parameter if the scrambling parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier, and the first identifier equaling a cell identifier if the scrambling parameter has not been configured and if the second identifier does not correspond to a wireless-device-specific identifier;
- obtaining a pseudo-random sequence based, at least in part, on the pseudo-random sequence initialization value;
- scrambling a downlink message with the obtained pseudo-random sequence;
- and
- transmitting the scrambled downlink message to a wireless device.
2 more elements
A radio network node comprising processing:
- circuitry configured to:
- obtain a pseudo-random sequence initialization value, the pseudo-random sequence initialization value being based, at least in part, on a first identifier, the first identifier equaling a scrambling parameter if the scrambling parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier, and the first identifier equaling a cell identifier if the scrambling parameter has not been configured and if the second identifier does not correspond to a wireless-device-specific identifier;
- obtain a pseudo-random sequence based, at least in part, on the pseudo-random sequence initialization value;
- scramble a downlink message with the obtained pseudo-random sequence;
- and
- transmit the scrambled downlink message to a wireless device.
3 more elements
A method in a wireless device, the method comprising:
- obtaining a pseudo-random sequence initialization value, the pseudo-random sequence initialization value being based, at least in part, on a first identifier, the first identifier equaling a scrambling parameter if the scrambling parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier, and the first identifier equaling a cell identifier if the scrambling parameter has not been configured and if the second identifier does not correspond to a wireless-device-specific identifier;
- obtaining a pseudo-random sequence based, at least in part, on the pseudo-random sequence initialization value;
- receiving a scrambled downlink message from a radio network node;
- and
- unscrambling the received scrambled downlink message with the obtained pseudo-random sequence.
2 more elements
A wireless device comprising:
- processing circuitry configured to:
- obtain a pseudo-random sequence initialization value, the pseudo-random sequence initialization value being based, at least in part, on a first identifier, the first identifier equaling a scrambling parameter if the scrambling parameter has been configured and if a second identifier corresponds to a wireless-device-specific identifier, and the first identifier equaling a cell identifier if the scrambling parameter has not been configured and if the second identifier does not correspond to a wireless-device-specific identifier;
- obtain a pseudo-random sequence based, at least in part, on the pseudo-random sequence initialization value;
- receive a scrambled downlink message from a radio network node;
- and
- unscramble the received scrambled downlink message with the obtained pseudo-random sequence.
3 more elements
Dependencies are inferred from the claim text.