This post underlines the LTE CPRI compression. Let's have a look together below to find more information on the topic.
User-plane data consumes a large amount of CPRI bandwidth resources in each cell. To support more carriers or RRUs/RFUs/pRRUs on a CPRI port, the CPRI Compression feature is introduced. This feature compresses the I/Q bit width and lowers the sampling rate to reduce the CPRI bandwidth resources required by the CPRI data transmission.
The CPRI compression is applied when the CPRI bandwidth is insufficient.
Bennefits
1. Extends carrier or RRU/RFU/pRRU specifications:
2. Reduces the required CPRI fiber optic cables:
The compression ratio is the ratio of bandwidth occupied by uncompressed data to bandwidth occupied by compressed data.
The following table lists the compression ratios used by the common and enhanced CPRI compression for different cell bandwidths.
Compression ratio for macro eNodeBs
Scenarios where CPRI compression should be enabled:
