PMC-Sierra enables wireless backhaul transport of Gigabit Ethernet services over OTN

SANTA CLARA, USA: PMC-Sierra Inc., the premier Internet infrastructure semiconductor solution provider, has introduced a complete reference design for its HyPHY chipset that supports standards-based transport of Ethernet-based services over the Optical Transport Network (OTN).

ITU-T G.709 version 3 (10/2009) specifies direct mapping of Gigabit Ethernet (GE) to the OTN layer by defining a new container for the smallest Optical Data Unit (ODU), ODU0 (1.238 Gbit/s), ensuring complete timing transparency and bandwidth efficiency of Ethernet-based client signals.

In conjunction with HyPHY’s innovative support for timing synchronization over packet services, the reference design enables cost-optimized Layer 1 OTN networks with full support for Ethernet network timing distribution, a critical requirement for wireless backhaul applications.

PMC-Sierra’s HyPHY chipset integrates support for mapping and multiplexing of GEs into sub-ODU1 (2.488Gbit/s) containers. The new PM5423-KIT ODU0 reference design leverages HyPHY’s flexible packet interfaces and unique OTN Payload Tributary Mapping (OPTM) technology to add support for the newly defined OTN mapping modes, including:

* Transparent GE mapping and de-mapping into/from ODU0 via GMP; and
* ITU-T ODU0 multiplexing and de-multiplexing into/from higher order ODUks.

“The exponential growth in Ethernet-based wireless backhaul, driven by 3G and LTE deployments, is accelerating the need for an efficient mechanism for GE transport over OTN,” said Travis Karr, vice president and general manager of PMC-Sierra’s Communication Products Division. “This reference design enhances our HyPHY product family for multi-service convergence over OTN and provides a time-to-market advantage for our customers.”

PMC-Sierra’s ODU0 reference design can be used with either the PM5420 HyPHY 20G or PM5426 HyPHY 10G device. It includes a complete collateral suite, including a hardware reference design for evaluation, design specification documentation, and FPGA source RTL for integration.

HyPHY chipset
HyPHY 20G delivers high capacity framing, mapping and multiplexing of Carrier Ethernet, SAN, OTN, transparent bit services such as video, and SONET/SDH to allow Carriers to reduce the number of network elements, while incrementally adding bandwidth or changing service mix per node without forklift upgrades.

The platform provides client-agnostic, rate-agile Small Form-Factor Pluggable (SFP) and 10 Gigabit pluggable (XFP or SFP+) interfaces and a set of flexible system interfaces for networking to a variety of switch fabric architectures. HyPHY 10G provides a lower density option for optical platforms. The HyPHY family integrates high-performance mixed-signal analog and media access control, along with numerous innovative features, including:

True Per-Port Rate and Protocol Flexibility: Independent, rate-agile SERDES for direct connect to SFP, SFP+ and XFP optical modules, reducing cost, power and footprint;
Multi-Service Muxponder: Single chip add-drop for both OTN and SONET/SDH;
Efficient Fiber Utilization: First to market with integrated pre-standard support for sub-ODU1 mapping of GE or other low speed client services; and
Carrier Ethernet: First to market with integrated support for Timing over Packet (IEEE 1588 and SynchE) and Ethernet Link OAM required in mobile backhaul.

The PM5423-KIT ODU0 FPGA reference design is available today. The PM5420 HyPHY 20G and PM5426 HyPHY 10G devices are also available.