Alcatel-Lucent 9500 MPR User Manual page 148

Tx Side
Following the flow from user Ethernet port to radio, the section performs:
– Reception of incoming Ethernet frames from the optical or electrical user interface (through INCA)
– Recovery of the clock coming from the MSS
– Management of the 1+1 EPS protection layer 2 messages
– Switch of the management frames from user port to internal processor
– Generation of MPT-HC to MPT-HC messages needed for radio link (ATPC, ACM, ...)
– Compression of the TDMoEth frames header (TDM2TDM - MEF8, TDM2ETH - MEF8)
– Management of the Quality of Service
– Fragmentation of the Ethernet frames
– Shaping of the traffic to adapt it to radio bandwidth
– Tx Modem frame building
– In 1+1, duplication of the built Tx modem frame and sending to the second MPT-HC through the pro-
tection coupling port
– In 1+1, reception of the Tx modem frame coming from the second MPT-HC
– In 1+1, switch of the Tx modem frame between the local and the one coming from second MPT-HC
depending on the EPS position
– Tx Radio frame building (FEC, pilots, ...)
– Synchronisation of the symbol rate to the MSS recovered clock
– Modulation in I and Q analogue signals to be sent to the RF section.
Rx Side
Following the flow from radio to user Ethernet port, the section performs:
– Reception of the I and Q analogue signals coming from the RF section
– Demodulation of the Rx radio frame into Rx modem frame
– In 1+1, Recovery of the symbol clock and duplication to the second MPT-HC
– In 1+1, duplication of the Rx modem frame and sending to the second MPT-HC through the protec-
tion coupling port
– In 1+1, reception of the Rx modem frame coming from the second MPT-HC
– In 1+1, hosts the RPS decision machine
– In 1+1, switch of the Rx modem frame between the local and the one coming from second MPT-HC
depending on the traditional RPS position and the modem frames quality
– Enhanced RPS
9500 MPR Rel. 3.1
146/980 3DB18809AAAA Issue 1
User Manual
Product information and planning