Hong Kong Broadband Network (HKBN) on Thursday said its lead in the ultra fast broadband market is being steadily eroded, and it is turning to content delivery networks (CDN) to stay one step ahead.

The company made a name for itself four years ago when it launched a symmetric 1-Gbps fibre-to-the-home (FTTH) service for $26 per month. That has enabled it to carve out a 33% share of the country's ultra fast broadband market.

An average customer uses 10s of gigabytes of data per month, said Sui-Lun Lo, CTO of HKBN, during a presentation at CommunicAsia. The hungriest customers are using 2 terabytes per month, he said.

"1 Gbps is not enough," he said. "To maintain our competitive edge…we must put all the content our customers want at their fingertips."

To do this, HKBN has been busy establishing interconnection agreements with the local CDNs of the world's biggest Web companies, providing customers with instant access to their cached content.

For smaller Web companies that don't have a CDN in Hong Kong, HKBN has built its own, Lo said.

"We keep a temporary copy of the content in our cache, and when a customer requests it, we first check the Internet to see if it is still available," he explained. If it has been deleted from the Internet, HKBN immediately deletes it from its cache.

"The advantage of this is a better customer experience," Lo said, adding that downloading content from a local source also lowers its international bandwidth costs.