What is the market-leading position of ADI in 5G radio solutions 
easier-to-use robots that help scale tasks safely and transform workforces.
Well, turning now to our communications business. 5G is beginning to broaden globally, especially in North America, as carriers look to deploy newly acquired C-band spectrum and ORAN continues to gain momentum also, with several of the largest European carriers setting ambitious 2025 ORAN deployment targets. This includes Vodafone, where our technologies are very well represented.
This quarter, we extended our market-leading position in 5G radio solutions with the introduction of the industry's first software-defined transceiver that includes a fully integrated digital front end. Our innovative radio architecture greatly improves power efficiency, thereby reducing radio weight, size and carrier expenses. This high level of integration eliminates FPGAs to simplify implementation and facilitate the proliferation of these emerging ORAN networks. Our next-generation transceiver platform is already designed in at a major Tier 1 global supplier that is gaining share in these 5G and ORAN deployments across North America as well as Europe.
Stepping back, we expect our communications business to return to growth in 2022. We have strong design momentum and our geographic mix has shifted with North America, Europe and Korea representing our largest sources of revenue.
Moving now on to automotive. Over the last two years, we've realigned our business to focus on electrification and in-cabin human experience. We're seeing the benefits of this strategy, as we continue to scale our market leadership in battery management, power management, audio systems and connectivity.
Starting firstly with our battery management systems, or BMS. Our wired and wireless portfolios provide unmatched accuracy to deliver market-leading vehicle range and can measure all key battery chemistries, including zero-cobalt LFP. Additionally, our solutions incorporate ASIL D functional safety and an ultra-low power continuous monitoring feature that ensures the battery remains stable even while parked, which is the first in the market.
In addition, this quarter marked the first time we recognized revenue for our wireless BMS solution, as General Motors prepares to ship its first of 30 EV models powered by the Ultium battery platform. And this is just the beginning for this groundbreaking BMS technology, as OEMs realized the power of wireless data in scaling their fleets.
Turning to audio systems and connectivity, as complexity continues to increase. There is very strong demand for our market-leading audio systems with signal processing, A2B connectivity, and active road noise cancellation. Our solutions offer the highest fidelity performance in the market, while reducing vehicle weight, removing nearly 100 pounds per vehicle. During the quarter, two leading OEMs adopted A2B and a Top 3 European vehicle manufacturer implemented A2B as its audio connectivity standard across its entire fleet.
In total, A2B is now designed in over 30 OEMs, including 18 of the Top 20 global automotive companies. Furthermore, interest in our active road noise cancellation feature continues to intensify. We are designed in at nine OEMs, up from five just a year ago, including Hyundai and a leading EV manufacturer. This added capability can more than double the value of our A2B solution.
In all, these are just a few of the countless examples of the tremendous work underway at ADI. We remain focused on delivering breakthrough innovations to stay ahead of our customers' needs.
So in closing, I have never been more confident about ADI's future. Over the last decade, we've built an industry-leading portfolio with unparalleled breadth and depth of capabilities that's aligned with more profitable end markets and our portfolio and leadership position will only get stronger with the acquisition of Maxim, enabling us to deliver strong returns in the years to come.
And so with that, I'll hand you over to Prashanth.
Prashanth Mahendra-Rajah -- Senior Vice President, Finance and Chief Financial Officer
Thank you, Vince. Good
easier-to-use robots that help scale tasks safely and transform workforces.
Well, turning now to our communications business. 5G is beginning to broaden globally, especially in North America, as carriers look to deploy newly acquired C-band spectrum and ORAN continues to gain momentum also, with several of the largest European carriers setting ambitious 2025 ORAN deployment targets. This includes Vodafone, where our technologies are very well represented.
This quarter, we extended our market-leading position in 5G radio solutions with the introduction of the industry's first software-defined transceiver that includes a fully integrated digital front end. Our innovative radio architecture greatly improves power efficiency, thereby reducing radio weight, size and carrier expenses. This high level of integration eliminates FPGAs to simplify implementation and facilitate the proliferation of these emerging ORAN networks. Our next-generation transceiver platform is already designed in at a major Tier 1 global supplier that is gaining share in these 5G and ORAN deployments across North America as well as Europe.
Stepping back, we expect our communications business to return to growth in 2022. We have strong design momentum and our geographic mix has shifted with North America, Europe and Korea representing our largest sources of revenue.
Moving now on to automotive. Over the last two years, we've realigned our business to focus on electrification and in-cabin human experience. We're seeing the benefits of this strategy, as we continue to scale our market leadership in battery management, power management, audio systems and connectivity.
Starting firstly with our battery management systems, or BMS. Our wired and wireless portfolios provide unmatched accuracy to deliver market-leading vehicle range and can measure all key battery chemistries, including zero-cobalt LFP. Additionally, our solutions incorporate ASIL D functional safety and an ultra-low power continuous monitoring feature that ensures the battery remains stable even while parked, which is the first in the market.
In addition, this quarter marked the first time we recognized revenue for our wireless BMS solution, as General Motors prepares to ship its first of 30 EV models powered by the Ultium battery platform. And this is just the beginning for this groundbreaking BMS technology, as OEMs realized the power of wireless data in scaling their fleets.
 Turning to audio systems and connectivity, as complexity continues to increase. There is very strong demand for our market-leading audio systems with signal processing, A2B connectivity, and active road noise cancellation. Our solutions offer the highest fidelity performance in the market, while reducing vehicle weight, removing nearly 100 pounds per vehicle. During the quarter, two leading OEMs adopted A2B and a Top 3 European vehicle manufacturer implemented A2B as its audio connectivity standard across its entire fleet.
In total, A2B is now designed in over 30 OEMs, including 18 of the Top 20 global automotive companies. Furthermore, interest in our active road noise cancellation feature continues to intensify. We are designed in at nine OEMs, up from five just a year ago, including Hyundai and a leading EV manufacturer. This added capability can more than double the value of our A2B solution.
In all, these are just a few of the countless examples of the tremendous work underway at ADI. We remain focused on delivering breakthrough innovations to stay ahead of our customers' needs.
So in closing, I have never been more confident about ADI's future. Over the last decade, we've built an industry-leading portfolio with unparalleled breadth and depth of capabilities that's aligned with more profitable end markets and our portfolio and leadership position will only get stronger with the acquisition of Maxim, enabling us to deliver strong returns in the years to come.
And so with that, I'll hand you over to Prashanth.
Prashanth Mahendra-Rajah -- Senior Vice President, Finance and Chief Financial Officer
Thank you, Vince. Good