Telkom is the Indonesian state-owned telecom operator offering enterprise, mobile (via its Telkomsel brand), home (mostly via IndiHome), wholesale, and international (via WIB) communications services. Telkom is the perennial leader in the country's fixed and mobile telecom markets.
Telkom's home services grow fast under its IndiHome brand. Since 2009, Telkom and ZTE have started a close cooperation to provide high-speed connectivity services through fiber-to-the-home (FTTH) deployment and diverse video services using ZTE's IPTV platform. This greatly enhances user satisfaction, expanding Telkom's subscriber base to more than 4.7 million. Accounting for 64% of home service revenue, IndiHome has become Telkom's star brand service.
Amid a rapidly developing broadband market, Telkom launched a large-scale FTTH construction in 2009 to provide users with higher bandwidth and better service experience. After nearly ten years of development, Telkom has boasted an optical distribution network (ODN) with a coverage capacity of around 16 million lines. The vast fiber resources have given Telkom huge advantages in business operation and have further boosted its IndiHome brand. To accelerate its digital transformation, Telkom has also actively explored fiber-to-the-mobile (FTTM) deployment that can quickly expand mobile backhaul transport services while fully utilizing existing fibers.
2G, 3G and 4G BTSs coexist in Telkom's existing network, and their service bandwidth and interfaces are different. 2G BTSs use E1 interfaces, while 3G and 4G BTSs adopt GE/FE interfaces.
ZTE's FTTM solution is compatible with the in-service BTSs and ensures smooth network evolution. By allowing TDM services to be carried over a PON, the solution can make full use of existing fiber resources.
BTSs require the transport network to have traffic classification, service differentiation, and bandwidth multiplexing capabilities. ZTE's FTTM solution enables GPON to differentiate services and set proper priorities for them to guarantee their respective bandwidth. Commercial verifications show that GPON has strict QoS assurance. For one-way end-to-end traffic, the transmission delay is less than 50 ms, the delay jitter is shorter than 10 ms, and the packet loss ratio is lower than 1%. In the signaling plane, the transmission delay is less than 100 ms, the delay jitter is shorter than 10 ms, and the packet loss ratio is lower than 0.1%.
Telkom has deployed ZTE's FTTM solution to achieve integrated access to TDM and IP data. The commercial FTTM has become the world's largest GPON-based integrated network for mobile backhaul and fixed access and also the industry's first GPON transport network for all service scenarios.
The FTTM solution employs ZTE's multi-unit access terminals including F820 and F829 to connect to the Node Bs and BTSs in the downlink and the OLT in the uplink. From the OLT, the uplink connection extends to Metro-E and IP/MPLS networks (Fig. 1).
Currently, Telkom's mobile transport network contains about 180,000 BTSs of different standards, and roughly 30% of them are backhauled through a GPON. The successful implementation of the ZTE FTTM solution won a high recognition from Telkom. With its deployment still expanding, the solution will help Telkom further increase the utilization of its GPON network.
TITAN, ZTE's flagship new-generation OLT, supports various PON technologies. TITAN delivers both 5G fronthaul and backhaul services, and is also compatible with 3G and 4G services. It supports P2MP 10G PON/50G PON or P2P transmission in the downstream direction and provides n×100GE or OTU4 interfaces in the upstream direction. Telkom can use TITAN to upgrade its existing 4G LTE sites to 5G and backhaul its 5G services.
TITAN can also offer enhanced functions like MEC, network slicing and SDN/NFV, providing stronger technical support for Telkom's 5G rollout down the road. At present, Telkom has completed the first-phase test with TITAN. With its new architecture and technologies, TITAN will soon be ready for Telkom's 5G deployment.
Telkom's large-scale commercial deployment of FTTM is a good example of successful FTTM application, because it fully reuses fiber resources of home broadband and simplifies network while ensuring service quality. As long-term partners, Telkom and ZTE keep exploring new technologies and solutions together to help Telkom lead the 5G race.