Method and device for adaptive pre-coding

A network node which supports an Enhanced General Packet Radio Service (EGPRS), the network node being arranged to receive Radio Link Control (RLC) data blocks transmitted from another network node in an EGPRS system as some pre-coded transmissions and some non-precoded transmissions, and to detect if a successfully received RLC data block, at least a part of which is received in a non-precoded transmission has been received successfully previously, and if that is the case, to use all or parts of the RLC data block in order to perform a pre-coder estimate, wherein the network node is further arranged to recognize if a dummy block, which is a block that is empty of payload, or at least a part of an RLC data block has been received in a precoded or a non-precoded transmission from the other network node based on having received from the other network node a pattern indicating when transmissions will be made precoded and/or non-precoded.

A method for operating a network node which supports an Enhanced General Packet Radio Service (EGPRS) and which is arranged to transmit Radio Link Control (RLC) data blocks to at least one other network node in an EGPRS system and to receive acknowledgments from the other network node for successfully received RLC data blocks, the method comprising checking if an RLC data block for transmission has been transmitted previously or has been transmitted previously but has not been acknowledged, and transmitting RLC data blocks which have not been transmitted previously with a first likelihood for precoding, and transmitting RLC data blocks which have been transmitted previously but have not been acknowledged as pre-emptive transmissions, with a second likelihood for precoding, whereby some of the transmissions of RLC data blocks that have been and have not been transmitted previously will be transmitted with said precoding.

A method for operating a network node which supports an Enhanced General Packet Radio Service (EGPRS), the method comprising receiving receive Radio Link Control (RLC) data blocks from another network node in an EGPRS system as some pre-coded transmission and/or and some non-precoded transmissions, and detecting if a successfully received RLC data block, at least part of which is received in a non-precoded transmission, has been received successfully previously, and if that is the case, performing a pre-coder estimate using all or parts of the RLC data block, the method further comprising recognizing if a dummy block, which is a block that is empty of payload, or all or parts of an RLC data block has been received in a precoded transmission from the other network node based on having received from the other network node a pattern indicating when transmissions will be made precoded and/or non-precoded.