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Hitachi

Corporate InformationResearch & Development

November 7, 2016

Report from Presenter


Photo 1 Presentation scene

The 5th Global Conference on Consumer Electronics (GCCE2016) was held in Kyoto, Japan, from October 11 to 14, 2016. GCCE was held for researchers mainly from Japan and Asia to discuss about technologies on consumer electronics. In GCCE2016, there were 152 oral presentations, 88 poster presentations and 12 demo presentations. I made a presentation titled "Incremental update method for resource-constrained in-vehicle ECUs" (Photo 1).

Today, the complexity of the control software of in-vehicle ECUs are increasing rapidly. The increasing of connectivity to the internet brings security risks on vehicle. In this situation, it is proposed to introduce the Over the Air firmware update technology (OTA); which is proven in consumer electronics field; to automotive filed. OTA is the technology which updates the software in remote. Using OTA, the improvement of vehicle functions and countermeasure to security risks will be achieved without the labor of users.


Fig. 1 Proposed method
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One of the major challenges to introduce OTA to automotive field is reduction of update time to improve availability of the vehicle. In order to solve the problem, we proposed incremental update method which reduces the amount of data transmission in vehicle. It is effective for update time reduction to reduce the amount of data transmission because of the narrow bandwidth of in-vehicle network. In the presentation, we introduced our approach which apply three improvements to the BSDIFF*1; block base comparison, two stage compression and data format serialization (Fig. 1). Then, we showed it is applicable to resource-constrained microcontroller for in-vehicle ECUs.

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