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AUTOMOTIVE ELECTRONICS FEATURE


The need for wireless speed


802.11ax SoCs for vehicles


Words by Jeff James & Avinash Ghirnikar, Marvell S


ociety’s constant access to and dependence on data sets new, heightened expectations for communication technology. People want the same connectivity while roaming in their cars, as in their homes. In order to succeed, therefore, automotive wireless connectivity has to meet three key criteria. It must be fast enough, supporting data rates that enable compelling multimedia services. Next, it should remain reliable, in spite of the demanding setting. Finally, it has to have elevated levels of security to protect the data being transmitted and received. But with more cars on our roads


utilising advanced wireless connectivity and ramping up their data consumption: every car will need to share the network with other cars located in their vicinity, and in highly congested areas there could potentially be hundreds of them. Well, a solution has emerged: 802.11ax. Optimised for high user density scenarios, 802.11ax has greater capacity and improved spectral efficiency compared to prior Wi-Fi standards; it can simultaneously handle a large number of data streams, and its MU-MIMO capabilities offer coverage improvements.


By using 802.11ax, V2I communications


may be made more cost-effective than via cellular. Furthermore, the low latency operation it supports means potential safety issues can be brought to the awareness of the driver (or the vehicle’s ADAS) in real-time, through the passing of information between nearby cars and/ or infrastructure. Likewise, this connectivity can be


E-MAR19-EUROQUARTZ:Layout 1 08/03/2019 10:03 Page 1


utilised in telematics/analysis activities. All the data acquired from the various sensors distributed throughout modern vehicles, can be securely transmitted back to the cloud. The manufacturer could thus check performance metrics, predict when servicing will be required, or identify any problems. Acting as an 802.11ax station (STA), the car will be able to upload data of this kind to any nearby 802.11ax access point (AP) without delays, due to other vehicles competing for AP bandwidth. In a similar manner to the domestic environment, the number of Wi-Fi endpoints is rising dramatically. In this regard, 802.11ax APs are able to connect to more handheld devices than previous generations, thanks to their OFDMA capabilities. This allows for the transfer


of entertainment content, while still ensuring a positive user experience. As an example of this technology, Marvell offers the 88Q9098 AEC- qualified 802.11ax SoC, capable of providing gigabit levels of data delivery. It encompasses 2x2 concurrent dual Wi- Fi, along with dual-mode Bluetooth 5/ BLE and 802.11p functionality. As this wireless connectivity combo device is purpose-built for automobile designs, it is better equipped for the rigors of automotive operation. In terms of security, Marvell’s technology also comes equipped with radar detection and ECC cryptography features. To elaborate on their use, if a radar signal appears on an occupied frequency, the technology will bounce to another channel, while the ECC cryptography will guard against hackers attempting to gain access to the data streams.


Marvell’s SoC intends to enter the market at a key time: as the world’s wireless map continues to expand, 802.11ax looks to plot the course for automotive electronics going forward.


Marvell Mercury has become an appr Mercury has become an approved supplier t


Automot ive Industry Approval for Mercury ed supplier to the Automotive industrtive industry,


 to longevity and ruggedness as well as design innovation in the taxing automotive component environment.


Mercury Europe provides sales, customer service, engineering expertise and market promotion in the Europe-wide market for quartz crystal product.


t: +44 (0)1460 230010 f: +44 (0)1460 230011


www.mecxtal-europe.com / ELECTRONICS ELECTRONICS | JUNE 2019 31 www.marvell.com


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