Digital City

Building FTTB to LTE/4GBy the time Safaricom acquires Spectrum

Front Haul and Backhaul will be already in place

SDC What you can see

16th January 2014

LTE Model

Met

ro

Spurs

Spurs

Extension to

RRU

Extension to

RRU

16th January 2014

Conventional BTS are located adjacent to the mast and antennas.

CPRI (Common Public Radio Interface) allows the use of a distributed architecture where BTS, are connected to remote radio heads via lossless fibre links that carry the CPRI data.

FTTB: building RRU Fronthaul

SDC Metro Fiber Manhole

16th January 2014

The Buildings to be connectedWe build the Backhaul and the Fronthaul while

Safaricom battles for Spectrum

16th January 2014

• At the moment the network is being optimized for backhauling• Extra splicings and all that to accommodate IPRAN

• We will do a further optimization• http://www.aglmediagroup.com/dark-fiber-the-coming-revolution-in-backhaul/ • The location of LTE core will be optimized taking in consideration geometry of BTS

sites, moving away from restriction of the geometry of old landline networks.• Subscriber transition to LTE, after voice over LTE (VoLTE) is embedded in all the

smartphones, paves the way for switches to be shut down • We will worry about latency.• The fastest path between two points is a straight line, not ring around the rosie.• A core, not a switch, serves LTE radio access networks. An LTE core is smaller. • Then after all that:• We will do a further optimization for content delivery• Because we are also building an OCDN (Operator Content Network)• We will get there.

We are building a OCDN