Receiving TM-RLC entity:
• The receiving TM-RLC entity receives TMD PDUs through the configured logical channels from the lower layer.
If segmentation is configured by upper layers, all TMD PDUs received within one TTI are reassembled to form the RLC SDU.
• If segmentation is not configured by upper layers, each TMD PDU is treated as a RLC SDU.
• The receiving TM RLC entity delivers RLC SDUs to upper layers through the TM-SAP.
Transmitting TM-RLC entity:
• The transmitting TM-RLC entity receives RLC SDUs from upper layers through the TM-SAP.
• All received RLC SDUs must be of a length that is a multiple of one of the valid
TMD PDU lengths.
• If segmentation has been configured by upper layers and a RLC SDU is larger than the TMD PDU size used by the lower layer for that TTI, the transmitting TM RLC entity segments RLC SDUs to fit the TMD PDUs size without adding RLC headers. All the TMD PDUs carrying one RLC SDU are sent in the same TTI, and no segment from another RLC SDU are sent in this TTI.
• If segmentation has not been configured by upper layers, then more than one RLC SDU can be sent in one TTI by placing one RLC SDU in one TMD PDU.
All TMD PDUs in one TTI must be of equal length.
• When the processing of a RLC SDU is complete, the resulting one or more TMD
PDU(s) are/is submitted to the lower layer through either a BCCH, DCCH,
PCCH, CCCH, SHCCH or a DTCH logical channel.
