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VLSI AND SYSTEM DESIGN
Case Study
Case Study on VLSI Design
 
Complex Switch Board Design
 
 
The customer
Our customer is a leading architect of Internet communications solutions. The Europe headquartered company builds next generation networks, delivering integrated end-to-end voice and data networking solutions.
 
The challenge
The customer wanted to develop a complex, high-speed, next generation terabit router board consisting of three printed board Assembly designs. Approximately 2800 components were required to be placed on the board, out of which more than 500 were ICs. The routing of such a high-density board with various constraints, high-speed signals and strict routing restrictions in the stipulated time was one of the key challenges.
 
The solution

The Solution was the design, development and verification of complex boards that encompassed four main subsystems:

Switch & Line subsystem that handles upto 10Gbps traffic
Clock subsystem that provides clock reference for the Switch system
Processor subsystem based on Motorola’s latest Power Quicc series
Set of physical Input/Output boards having STM-1/OC-3, STM-4/OC-12, STM-16/OC-48 and Gigabit Ethernet interfaces

The key highlights of the design were:
24-layer controlled impedance board (505 x 350mm) containing 16 signal layers
Routing of about 18000 Signals
Differential Pairs (upto 622 MHz) and single ended nets (upto 133 MHz)
Signal integrity analysis (pre & post layout)
Bus frequencies upto 133 MHz on the board

Concurrent design approach was used to design the board in which schematic entry, placement and routing took place simultaneously, thus shrinking design turnaround time significantly
 
The benefit
Wipro provided exceptional results on the technical front and ensured that there zero defects in the final deliverables.

The customer’s high speed terabit switch/router product, of which Wipro’s switch board design was an integral component, was successfully demonstrated at international forums to overwhelming response from visiting customers, industry analysts, media and press editors. And we recorded yet another customer success, reinforcing Wipro’s promise of established design and implementation expertise along with superior quality management.

 
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