Emerging Wireless Technologies of 2015: A Guide for M2M & IoT

When designing next‑generation M2M or Internet of Things products, staying ahead of the wireless curve is essential. Below is a concise overview of the key wireless standards that were emerging in 2015, with a focus on performance, range, and practical deployment considerations.

Wireless Gigabit: Wi‑Fi 802.11ad (60 GHz)

Wi‑Fi has evolved from 802.11b/g/n to 802.11ac, each step adding speed, stability, and capacity. However, the 2.4 GHz and 5 GHz bands hit a practical ceiling for throughput. 802.11ad moves the conversation to the 60 GHz millimeter‑wave spectrum, delivering up to 7 Gbps under ideal conditions. The trade‑off is a very short range (typically < 10 ft) due to oxygen absorption and limited penetration. Deploying 802.11ad requires new radios and antennas, so existing routers, laptops, and phones cannot support it without hardware upgrades.

Long‑Range Wi‑Fi: Wi‑Fi 802.11ah (Sub‑GHz)

On the opposite end of the spectrum, 802.11ah operates in sub‑GHz bands (915 MHz in the Americas, 868 MHz in Europe), offering lower data rates but dramatically extended range and improved building penetration. These characteristics make 802.11ah a strong candidate for IoT deployments that prioritize coverage over peak throughput. The main challenge is the lack of a single worldwide sub‑GHz band, which can complicate global device design.

Bluetooth Smart (Low Energy)

Bluetooth Low Energy (BLE), also known as Bluetooth Smart, continues to use the 2.4 GHz ISM band but introduces a highly power‑efficient protocol for short bursts of data. This makes BLE ideal for beacon‑based proximity systems (e.g., Apple iBeacon) and for low‑power sensors such as OBD readers or GPS trackers. By eliminating continuous transmissions, BLE can extend battery life from days to months in many applications.

Wireless Power Transfer

While most discussions focus on data, wireless power is an equally exciting frontier. WiTricity’s research demonstrates coupling a low‑frequency radio (≈ 9.9 MHz) to generate a near‑field that can wirelessly beam power between a charger and a device—potentially extending to electric vehicles. This technology is still in development but holds promise for truly untethered charging solutions.

Symphony Link

For those needing ultra‑long‑range radio solutions, Link Labs offers the Symphony Link system. Please review our whitepaper for a detailed technical overview.