• Shaikh Ajmal Shafi
• Pratibha Chavan

With increasing demand of Internet and availability of handsets supporting high speed data rate. Technological evolution is to take place. 4G & 5G are the current technologies being used to cater the demand of high speed data download. These technologies are not only confined to high speed download or upload, but also they are different with their preceding technologies because of their ability to provide low latency. High Speed data, such as 10 Gbps in downlink & 1 Gbps in uplink and Low latency such as 1ms or less would make 5G as preferred and widely accepted technology in coming days. To provide high speed data and low latency a technique called cloud RAN (C-RAN) has been invented. In C-RAN base band processing unit and Radio units are kept away from each other. And these Hardware units are connected via a common public radio interface called (CPRI) instead of Coax or copper wire. In order to send the large amount of data, it needs to be compressed, which is the enhancement of CPRI. To compress the data, vector quantization-based algorithm is used for CPRI links, making use of Lloyd algorithm. For optimal performance methods, vector I/Q samples and enhanced initialization of the Lloyd algorithm for the Codebook training need to be investigated further.

Common public radio interface called (CPRI), Cloud RAN (C-RAN), Vector quantization(VQ), Code book, Lloyd algorithm, LBG (Linday- Buzo-Gray), Kekre’s Proportionate Error (KPE), Kekre’s Median Codebook Generation (KMCG), Kekre’s Fast Codebook Generation (KFCG).

"Vector quantization based CPRI compression algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.7, Issue 6, page no.1196-1199, June 2020, Available :http://www.jetir.org/papers/JETIR2006507.pdf

"Vector quantization based CPRI compression algorithm", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.7, Issue 6, page no. pp1196-1199, June 2020, Available at : http://www.jetir.org/papers/JETIR2006507.pdf