eCPRI Intel® FPGA IP User Guide

ID 683685
Date 11/11/2021

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4.3.4. Header Mapper/De-Mapper

The Header mapper/De-mapper block append or remove the eCPRI common header from the eCPRI message. The Mapper block calculates the payload size of the incoming Avalon-ST packet and append it into the packet as part of the eCPRI common header field. The table below shows the eCPRI common header format. The eCPRI protocol version is a read only field and the Protocol Revision parameter determines the value of this field. The concatenation and message type are determined from the Avalon-ST sink sideband interface signals which come along with eCPRI message. The payload size is calculated when the eCPRI message enter eCPRI IP at Avalon-ST interface.
Table 13.  eCPRI Common Header Format
0 (MSB) 1 2 3 4 5 6 7 (LSB) No. of Bytes
eCPRI Protocol Version= 0001b Reserved Concatenation 1
eCPRI Message Type 1
eCPRI Payload Size 2