To accommodate the rapid demand for video broadband services, broadband carriers seek to provide high speed and high quality data and IPTV services through existing DSL resources. The key to delivering stable DSL lines is reducing impulse noise interference. ITU-T G.998.4 retransmission technology is an important milestone for DSL technology because it improves DSL stability by diminishing impulse noise, lowering high bit error rates (BER), and reducing the number of dropped VoIP calls, and frozen, blank, or paused screens.
In this Huawei-led DSL retransmission test, chipsets from different suppliers passed the IOP test, even in high impulse noise environments. In the ADSL2+ IOP test between Broadcom and Lantiq, the payload throughputs showed little difference between retransmission features enabled with impulse noise, and retransmission features without impulse noise. The maximum packet delay caused by retransmission is approximately six milliseconds, and the anti-impulse-noise capability of the retransmission technology is more than 10 times that of traditional INP technologies.
“Broadcom is pleased to have reached interoperability of retransmission and to have contributed essential elements to ITU standardisation of this technology. We have demonstrated the outstanding performance advantages of this technique for several years, and now, by working with our partners, we believe retransmission will become an essential part of IPTV deployments worldwide,” said Greg Fischer, vice president and general manager of carrier access for Broadcom.
Said Hubert Christl, senior vice president and general manager of the Access Networks Business Unit for Lantiq: “As a leading DSL chipset supplier, Lantiq believes interoperability is the key to broad market adoption. With Lantiq’s contribution to the ITU-T standard, we enable system suppliers and carriers using standard-compliant equipment to introduce retransmission functionality with multi-service capabilities quickly to the market. This successful interop event is another validation of the benefits of retransmission, and Lantiq’s excellent performance during this event sets the stage for advanced service deployment.”
Deng Xiaohe, chief officer of access network product line, Huawei, said: “DSL retransmission technology will help carriers worldwide to construct best in class ultra- broadband, ultra-stable DSL networks. We believe that through our joint efforts with industry leading chipset suppliers, this technology will enable carriers to roll out new services that meet the needs of today’s consumers who seek, not only higher bandwidth and richer services, but better broadband service stability.”
As a major DSL shipment vendor, Huawei’s DSL products serve top tier carriers, including China Mobile, China Unicom, China Telecom, BT, Vodafone, DT, and FT.