partners engineering execellence

Case Study – Maximize Competitive Advantage with Power Optimized Products


With increasing number of consumers becoming concerned about the environmental impact their devices can create and hence, choosing products with higher energy ratings, careful consideration of optimal power consumption by devices has become important. The benefits of incorporating energy efficiency is not only related to end user value but also impacts a manufacturer through enhanced device performance & life, decreased operational and energy consumption costs; thereby leading towards significant competitive advantage.

Considering the same, a leading OEM of office automation products planned to optimize power consumption of their MFDs. They approached Celstream with a need to reduce the power consumption of the controller boards by 50%.

  • To first understand and then modify complex systems software developed by a third party – with limited support.
  • Deliver an optimized product within a challenging timeframe of 3 months to enhance competitiveness of the client’s portfolio
Key Highlights

  • Quick understanding of 3rd party systems architecture & complex software
  • Modification of complex source code to implement power saving infrastructure in order to reduce the power consumption in sleep mode
  • Better than expected power saving efficiency
    • Initial Target – Reduce power consumption by 50%
    • Achieved Target- Reduced power consumption by 60%
Celstream's Response

The key highlights of the solution development included:

  • Understanding the third party systems architecture and identification of possible power saving options
  • Measurement of power consumption of each subsystem and the overall power consumption of the device
  • Benchmark power consumption by comparing the obtained measurements with datasheets of various subsystems
  • Investigation of the architecture necessary to implement power saving infrastructure
  • Design and develop software infrastructure for device to enter and exit sleep modes
  • Implementation and enhancement of device drivers and system startup code within the developed power saving infrastructure
  • Source code modification and optimization for each subsystem to match the sleep mode operations with datasheets
  • Validation and rectification of subsystems to ensure that they are in power saving mode while in sleep, to achieve the desired overall power consumption
  • Validation and rectification of subsystems to operate with full functionality when in wake-up mode
Benefits to Customer

  • On time delivery of the optimizations within the challenging time frame of 3 months
  • Quick ramp up on an entirely new controller architecture and proprietary code base
  • Delivery of better than expected power saving efficiency of 60%
  • Enabled competitive advantage at a lower operational & development cost

Celstream used the following key software tools and technologies for developing the effective solution:

    • Linux Device Drivers
    • Marvell Controllers
    • C
    • USB, Wi-Fi®, Ethernet
    • DDR
    • Power Management
    • Linux Kernel

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