Method and device for flexible, selective SSDF relaying
AssigneeOrange
InventorsRaphael Visoz, Abdulaziz Mohamad, Antoine Berthet
Life of this patent
Estimating the term…
Abstract
A method and relay for relaying messages. The relay includes tests reliability relating solely to messages estimated with error and taken in their form prior to error detection in order to be able to separate messages that are reliable and messages that are not reliable. The relay also includes a shaper unit having a channel interleaver and a modulator taking account only of the messages estimated without error and of those messages estimated with error that are reliable, this shaping being performed in soft form if at least one message estimated with error successfully passes the reliability test.
Claims13
A relaying method:
- relaying messages by a relay in a telecommunications system having M sources, L relays, and D destinations, M≥1, L≥1, D≥1, the transmissions between the sources, the relays, and the destinations taking place via a transmission channel, wherein relaying comprises the following acts performed by the relay:
- soft decoding code words transmitted by at least one source during a given first number of the channel uses in order to obtain vectors of soft values representing the decoded messages;
- detecting errors in the vectors in order to be able to separate messages estimated without error from messages estimated with error;
- reliability testing relating solely to the vectors of messages estimated with error in order to be able to separate messages that are reliable from messages that are not reliable;
- shaping, comprising channel interleaving and modulation taking account only of the messages estimated without error and of those messages estimated with error that are reliable, this shaping being performed in soft form if at least one message estimated with error successfully passes the reliability testing;
- and
- during a second given number of channel uses, transmitting a signal that is representative of the messages taken into account by the shaping.
A relay for a telecommunications system having M sources, L relays, and D destinations, M≥1, L≥1, D≥1, for performing a relaying method, the relay comprising:
- an electronic circuit or processor configured according to instructions of a relaying program to perform acts comprising:
- soft decoding code words transmitted by at least one source during a given first number of the channel uses in order to obtain vectors of soft values representing the decoded messages;
- detecting errors in the vectors in order to separate messages estimated without error from messages estimated with error;
- reliability testing relating solely to the vectors of messages estimated with error in order to be able to separate messages that are reliable from messages that are not reliable;
- and
- shaping comprising:
- channel interleaving and modulation taking account only of the messages estimated without error and of those messages estimated with error that are reliable, this shaping being performed in soft form if at least one message estimated with error successfully passes the reliability testing;
- and
- a transmitter, which transmits during a second given number of channel uses a signal representative of the messages taken into account by the shaper unit.
Dependencies are inferred from the claim text.