Multiplexing/demultiplexing of higher layer PDUs – Multiplexing/demultiplexing of multiple TBFs on the same PDTCH. – Scheduling of RLC/MAC data and control PDUs delivered to the physical channel on – a shared channel Splitting/recombining RLC/MAC PDUs onto/from several shared logical channels. – RLC operates in Acknowledge mode (AM) or UnAcknowledged mode (UM). Functions include: Segmentation of layer PDUs into RLC data blocks – Concatenation of layer PDUs into RLC data blocks – Padding to fill out RLC data – Reassembly of RLC data blocks into upper layer PDU – In-sequence delivery of upper layer PDUs – Link Adaptation – Ciphering and deciphering in Iu Mode – Sequence number check to detect lost RLC blocks. – For Iu mode of operation, RLC can also operate in Transparent Mode for carrying spectrally efficient VoIP. In addition to the RLC provides the following functions when operating in ACK mode: Backward (BEC) procedure enabling the selective retransmission of RLC data blocks. – Discard of RLC SDUs not yet segmented into RLC PDUs, according to the – requirements of the associated . 4.3.7. RRC layer design Radio Resource Control (RRC) layer design for SRI- is based on ETSI GERAN Iu mode RRC specifications () specifications with satellite specific optimizations to cater to long delay environments and achieve better spectral efficiency. RRC state model is based on RRC states defined in TS and is illustrated in Fig. . RRC functions include: Assignment, reconfiguration, and release of radio resources for the RRC connection – Establishment, reconfiguration, and release of – Release of signalling connections – Paging – Routing of higher layer PDUs – Control of requested QoS – Control of – Integrity – Support for –
– Multiplexing/demultiplexing of higher layer PDUs – Multiplexing/demultiplexing of multiple TBFs on the same PDTCH. – Scheduling of RLC/MAC data and control PDUs delivered to the physical channel on a shared channel – Splitting/recombining RLC/MAC PDUs onto/from several shared logical channels. RLC operates in Acknowledge mode (AM) or UnAcknowledged mode (UM). Functions include: – Segmentation of layer PDUs into RLC data blocks – Concatenation of layer PDUs into RLC data blocks – Padding to fill out RLC data – Reassembly of RLC data blocks into upper layer PDU – In-sequence delivery of upper layer PDUs – Link Adaptation – Ciphering and deciphering in Iu Mode – Sequence number check to detect lost RLC blocks. For Iu mode of operation, RLC can also operate in Transparent Mode for carrying spectrally efficient VoIP. In addition to the RLC provides the following functions when operating in ACK mode: – Backward (BEC) procedure enabling the selective retransmission of RLC data blocks. – Discard of RLC SDUs not yet segmented into RLC PDUs, according to the requirements of the associated . 4.3.7. RRC layer design Radio Resource Control (RRC) layer design for SRI- is based on ETSI GERAN Iu mode RRC specifications () specifications with satellite specific optimizations to cater to long delay environments and achieve better spectral efficiency. RRC state model is based on RRC states defined in TS and is illustrated in Fig. . RRC functions include: – Assignment, reconfiguration, and release of radio resources for the RRC connection – Establishment, reconfiguration, and release of – Release of signalling connections – Paging – Routing of higher layer PDUs – Control of requested QoS – Control of – Integrity – Support for
R-REC-M.1850-0-201408-D!!MSW-E.docx