Efficient user plane architecture

A data transmitting node for transmitting data over a wireless interface in a communication system to a data receiving node, comprising:

• a third layer processing unit for performing an automatic repeat request, ARQ, retransmission according to a status report fed back from the data receiving node;
• a second layer processing unit for receiving, from the third layer processing unit, a third layer data unit, segmenting the third layer data unit according to the status report and based on a resource allocation and forming a plurality of second layer data units including the respective segments of the segmented third layer data unit;
• a first layer processing unit for receiving from the second layer one or more of the plurality of the second layer data units and mapping the one or more of the plurality of the second layer data units onto the resources allocated for data transmission;
• and
• a transmitter for transmitting the data mapped onto the allocated resources.

A data receiving node, comprising:

• a receiver for receiving data over a wireless interface in a communication system from a data transmitting node;
• a first layer processing unit for de-mapping one or more of a plurality of second layer data units from the resources allocated for data transmission and for providing the one or more of the plurality of the de-mapped second layer data units to a second layer processing unit;
• the second layer processing unit for performing de-multiplexing of a plurality of third layer unit segments and segmentation control information from the one or more of the plurality of second layer data units, and forwarding the plurality of the demultiplexed third layer unit segments together with the segmentation control information to a third layer processing unit;
• the third layer processing unit for performing re-ordering of the plurality of the demultiplexed third layer unit segments and assembly of the demultiplexed third layer unit segments into a third layer data unit.

A method for transmitting data over a wireless interface in a communication system to a data receiving node, comprising:

• performing a third layer processing including performing an automatic repeat request, ARQ, retransmission according to a status report fed back from the data receiving node and for re-segmenting or not data to be retransmitted based on segment length information included in the status report including adding to the data a segmentation control information;
• performing a second layer processing including receiving, from the third layer processing unit, a third layer data unit, segmenting the third layer data unit based on a resource allocation and forming a plurality of second layer data units including the respective segments of the third layer data unit and the segmentation control information which is modified if re-segmentation is to be applied;
• and
• performing a first layer processing including receiving from the second layer one or more of the plurality of the second layer data units and mapping the one or more of the plurality of the second layer data units onto the resources allocated for data transmission.

A method for transmitting data over a wireless interface in a communication system to a data receiving node, comprising:

• a third layer processing including performing an automatic repeat request, ARQ, retransmission according to a status report fed back from the data receiving node;
• a second layer processing including receiving, from the third layer processing unit, a third layer data unit, segmenting the third layer data unit according to the status report and based on a resource allocation and forming a plurality of second layer data units including the respective segments of the segmented third layer data unit;
• and
• a first layer processing including receiving from the second layer one or more of the plurality of the second layer data units and mapping the one or more of the plurality of the second layer data units onto the resources allocated for data transmission.