Scrambling of physical channels and reference signals in wireless communication networks
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsStefan Parkvall, Robert Baldemair, Claes Tidestav, Mattias Frenne
Life of this patent
Estimating the term…
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.
Claims20
A method in a radio network node, the method comprising:
- sending, to a wireless device, a configuration of a first parameter;
- obtaining a pseudo-random sequence initialization value, the pseudo-random sequence initialization value being based, at least in part, on a first identifier and on a second identifier, wherein at least the first identifier is equal to the first parameter and the second identifier corresponds 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.
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 and on a second identifier, the first identifier being equal to a first parameter if at least the first parameter has been configured and the second identifier corresponds 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.
A wireless device, the 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 and on a second identifier,
- the first identifier being equal to a first parameter if at least the first parameter has been configured and the second identifier corresponds 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.
Dependencies are inferred from the claim text.