Wednesday, June 13, 2007

Broadcom Introduces Impulse Noise Protection for ADSL and VDSL Modems

Broadcom introduced an impulse noise protection technology that provides a significant improvement in residual bit error rate (BER) on ADSL2+/VDSL2 lines.

The new impulse protection solution, marketed as Broadcom "PhyR" (pronounced "Fire") technology, incorporates Broadcom's ADSL2+/VDSL2 firmware. In contrast to previous impulse noise protection techniques, Broadcom said its PhyR technology provides a number of key advantages:

  • As much as a ten times higher impulse noise resilience

  • Significantly lower residual BER or packet-loss

  • An extended network service area (higher rate, longer reach, lower delay)

  • Simplified network provisioning (no per user "tuning")

  • Firmware upgrade to central office and customer premise equipment

  • Transparency to network and upper layer applications (significantly reduces the burden on networks that use higher layer retransmission schemes for improving network efficiency)

All new and previously deployed Broadcom central office and consumer premise equipment silicon solutions are firmware upgradeable to the innovative PhyR firmware.

Broadcom believes the technology is especially useful for video services provisioned over traditional copper loops, which are susceptible to noise sources in the ambient environment that limit the coverage area over which services can be made available, or may even reduce video quality by inducing "macro-blocking." area. Broadcom's PhyR technology significantly improves noise protection without inducing limitations of reach, rate, margin or latency.

PhyR field trials and system demonstrations are currently underway as a means to validate the robustness of the technology. Broadcom said that at present, live field data demonstrates a ten-fold reduction of error lines resulting in a vastly improved video experience. The field trials also show 3dB of equivalent coding gain that enables a dramatic extension of IPTV services or even data-only service reach.

Broadcom's PhyR impulse noise protection and retransmission technology is currently being considered for DSL standardization.