Wi-Fi in the car: how to meet the concurrent needs of multiple systems and applications: Page 5 of 5

December 11, 2017 //By Richard Barrett, Cypress Semiconductor
Wi-Fi in the car: how to meet the concurrent needs of multiple systems and applications
People today have become used to living within wireless reach of the internet every minute of every day. At home, at the workplace, or when out on foot or on public transport, the internet is instantly accessible to anyone carrying a smartphone. So why not in the car as well?

The security of a connected car is a systems issue which concerns every ‘pipe’ between the vehicle and the outside world, whether Wi-Fi, Bluetooth, LTE or a hard wire. But securing the Wi-Fi channel is an important part of a complete security strategy for the car. Any Wi-Fi chip embedded in the vehicle should therefore support the latest, proven standards for encryption and authentication. The CYW89359 supports technologies including:

  • WPA and WPA2 for authentication
  • the Chinese Wireless Authentication and Privacy Infrastructure (WAPI) standard
  • Advanced Encryption Standard (AES) and Temporal Key Integrity Protocol (TKIP) for encryption

Key issues in Wi-Fi implementation in the vehicle

This article has described the most likely use cases for an in-vehicle Wi-Fi network. It is clear from this description that any implementation of Wi-Fi in a passenger car needs to provide for seamless, uninterrupted and concurrent operation of multiple applications over the 2.4GHz and 5GHz radio frequencies, including internet connectivity for end user devices, display sharing services, and Bluetooth applications.

Car manufacturers specifying wireless connectivity need to integrate solutions that offer simultaneous operation of separate communications streams over the 2.4GHz and 5GHz Wi-Fi channels and over the Bluetooth 2.4GHz channel.

This is the requirement that the CYW89359 from Cypress meets, while providing a complete on-chip implementation of the Wi-Fi and Bluetooth protocols, thus relieving a host controller of the burden of implementing these radio functions.

About the author:

Richard Barrett is Automotive Product Marketing Director, Cypress Semiconductor (www.cypress.com)



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