There are a huge number of discussions going on in the world regarding wireless network deployments. Every new smart phone has wireless data capabilities, with 3G becoming main stream and next generation LTE currently being fielded. LTE is expected to enable data transfer rates to mobile devices between 15 and 100 times faster than 3G networks.
All of this wireless data ultimately needs to feed back into the network. With the explosion of wireless internet traffic, we are increasingly seeing a need to aggregate and backhaul wireless traffic using optical fiber links.
The Common Public Radio Interface specification, or CPRI (pronounced sip-ri) for short, is a standard for wireless backhaul. CPRI was a major initiative formed in 2003 by several well-known telecommunication companies: Ericsson, Huawei, NEC, Nortel, Nokia Siemens Networks, and Alcatel Lucent. The CPRI committee set out to define a new standardized interface for the interconnect point between the Radio Equipment (RE) and the Radio Equipment Controller (REC) within a base station.
Finisar has several SFP/SFP+ transceiver modules ideal for wireless and other base station applications, including CPRI. Finisar’s CPRI reference guide provides some useful information such as typical system architecture, supported radio standards, and the physical layer specification per the CPRI standard. You can download this guide anytime from the blue download section of our web page. In addition, the reference guide includes a Finisar compatibility product matrix that should make it easy to identify CPRI-ready products for wireless applications.
One of the great advantages of CPRI is its intent not to create yet another standard that would govern optical or electrical transceivers, but rather to leverage existing standards and technologies. For suppliers like Finisar, this means we can leverage the economies of scale of optical modules that are already in large volume production and combine those volumes with CPRI wireless applications. Furthermore, Finisar’s 4 Gb/s and 8 Gb/s products are already poised to easily handle the needs of next generation wireless equipment, including WiMAX and LTE.
Please feel free to share your comments on the CPRI wireless standard and optical transceivers.