Monday, June 6, 2005

Alcatel and Freescale Align on GPON

Alcatel and Freescale Semiconductor have collaborated to a Gigabit PON (GPON) standards-compliant silicon solution. The chip leverages Freescale's PowerQUICC communications processor architecture based on PowerPC cores and digital signal processors (DSPs) based on StarCore technology, along with Alcatel's implementation of the standard GPON medium access control (MAC). Alcatel's implementation of the GPON MAC offers full compliance to ITU-T G.984 with data rates of 2.5Gbps downstream and 1.25Gbps upstream at a 1:128 split ratio. The MAC also integrates advanced encryption standard, forward error correction in both upstream and downstream directions, and dynamic bandwidth assignment.

The companies said their GPON chip provides full functionality for triple play services, including high-definition IPTV. This includes full QoS support and high bandwidth throughput of 200 Mbps per user and higher, thus eliminating much of the additional circuitry needed to implement economical GPON solutions. The scalable SoC solution can also be easily extended to support business applications, such as E1/T1 circuit emulation services and residential gateway functionality.

  • Earlier this month, Alcatel introduced a GPON solution for its ISAM access family, offering full compliance to the new ITU standard (G.984.x) with 2.4 Gbps of downstream bandwidth and of 1.2 Gbps upstream bandwidth. In comparison, BPON supports 622 Mbps of downstream bandwidth and 155 Mbps upstream. BPON is ATM-based, whereas GPON is native IP. GPON also supports up to a 1:64 passive split and a 20 km reach (28dB link budget). Alcatel said carriers may choose to deploy GPON in new areas of their network, BPON in current network rollouts, and a mixed BPON/GPON environment in others.

See also