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“Today, society is very dependent on real-time data access, and this puts forward new and higher requirements for related communication technologies. Fundamentally, people want to have the exact same data connectivity performance as they do at home everywhere, and one of the very important occasions is in the car, because people spend a lot of time in the car every day, including commuting to and from get off work and leisure travel.
Today, society is very dependent on real-time data access, and this puts forward new and higher requirements for related communication technologies. Fundamentally, people want to have the exact same data connectivity performance as they do at home everywhere, and one of the very important occasions is in the car, because people spend a lot of time in the car every day, including commuting to and from get off work and leisure travel.
There are three key criteria that must be met in order to enable wireless communication in vehicles. First, the connection must be fast enough to support the required data rates to be able to provide great multimedia services. Second, it provides high reliability even in environments more demanding than those in the consumer electronics industry. Finally, a higher level of security must be in place to ensure the security of data transmission/reception.
As more and more cars on the road begin to adopt advanced wireless connectivity, and as a result, data consumption has skyrocketed, obtaining sufficient available wireless medium has become a major technical challenge. Vehicles must share the network with other vehicles in the vicinity, and in highly congested areas there may be hundreds of these vehicles.
Adopting LTE/5G communication technology is an effective way to solve this problem. However, the economic viability of this approach remains in question as it relies on licensed wireless network usage. This may result in increased financial expenses and adversely affect the viability of business models associated with different services.
The next-generation Wi-Fi standard, 802.11ax, is an ideal alternative. Optimized for high user density scenarios, the new 802.11ax standard can significantly increase network capacity and spectral efficiency over previous Wi-Fi technologies. The standard also adds Wi-Fi OFDMA modulation to handle large numbers of data streams simultaneously, and support for Multi-Channel MIMO (MU-MIMO) for significantly improved overall coverage.
Compared with the use of mobile networks, 802.11ax-based vehicle-to-infrastructure communication (V2I: Vehicle to Infrastructure) is more cost-effective. Additionally, the lower latency it supports means that by relaying information between nearby vehicles or infrastructure, alerts in real-time (or through the vehicle’s ADAS system) can alert drivers to unusual road conditions, such as accidents on the road ahead, etc. . The driver can thus make a timely response and avoid potential dangers. In addition, this connection can also be used for telemetry and analysis. By securely transmitting data from a vehicle’s numerous sensors to the cloud in real-time, automakers can analyze this data to check performance metrics, estimate when the next repair will take place, or identify any serious issues that need immediate attention. The vehicle acts as an 802.11ax base station (STA) and is able to upload such data to any nearby 802.11ax access point (AP) without delays due to insufficient bandwidth at the access point. 802.11ax supports OFDMA and MU-MIMO technologies, allowing the medium to be shared with other parties instead of competing for the medium, resulting in improved space, spectrum and time utilization.
Another capability that 802.11ax connectivity can deliver is over-the-air firmware updates after the vehicle leaves the factory. Vehicles are constantly being improved, and automakers want to implement these new features in time for the life of the car, but cars are on the road for years and replacement cycles far outstrip products like smartphones. In the past, when updating, it was necessary to send the car back to the dealer, and then update it through the wired interface, which was not only very inconvenient for the car owner, but also had to be operated by technicians on site, and the cost was considerable. Regular firmware updates over a wireless network certainly offer a better option, all owners need are adequate bandwidth and security.
Utilizing a secure and reliable wireless platform to do this for all relevant models at the same time allows automakers to gain more logistical and economic benefits. At the same time, owners appreciate the fact that they don’t have to spend their busy schedules sending their vehicles back to dealerships for updates. Even if an update is required before a car is sold, such as a vehicle waiting to be shipped out at a port, or parked in a production plant’s parking lot waiting to be shipped out, the advantages of over-the-air updates over direct physical contact are clear. Operations are much more efficient, and far fewer human resources are required to undertake tasks, saving significant time and expense.
Now let’s get back to the passengers in the car and their needs. The number of Wi-Fi endpoints that need to be installed in the car is increasing dramatically, and so must the connectivity. Compared to previous generations of technology, 802.11ax access points can connect to more handheld devices (thanks to its OFDMA capability), allowing content such as digital entertainment to be transmitted, while still ensuring a high-quality user experience without any compromises. Depressed situation.
Figure 1: Marvell’s 88Q9098 802.11ax Combo SoC
For the connected car market, Marvell introduced the industry’s first 802.11ax Wi-Fi wireless connectivity solution, the 88Q9098. The SoC meets AEC-Q100 Grade 2 requirements for the automotive industry, integrates 2×2 plus 2×2 simultaneous dual Wi-Fi, dual-mode Bluetooth 5/Bluetooth Low Energy (BLE) and 802.11p, and supports Gigabit-class data transmission. Because this wireless connectivity combo is designed for the car, rather than taking and repurposing an existing consumer-targeted SoC, it can better handle the rigors of car handling. It operates over a temperature range of -40°C to +105°C and integrates a range of protection mechanisms against electrostatic discharge (ESD) shock and electromagnetic interference (EMI). Other important features include instantaneous radar detection, if a radar signal is present on an occupied channel, it is quickly moved to another channel, and data is protected by symmetric encryption with Elliptic Curve Cryptography (ECC) Stream safe from hackers.
FIGURE 2: 88Q9098 FUNCTIONAL BLOCK DIAGRAM
The 802.11ax protocol means that the Wi-Fi performance people experience when accessing in the car is the same as the performance they experience at home/office. By implementing car-optimized solutions, it is possible to achieve seamless wireless connectivity, and the services that are now reliant on some aspects of life will become ubiquitous and available in a timely manner, no matter where you are or what you are doing. .