Long-Range Low-Energy Systems for the Internet of Things

物联网是指在未来几年内将连接到互联网的许多设备。根据各种消息来源，到2020年，连接到互联网的设备数量估计在260亿到500亿之间(2012年所有连接到互联网的设备数量估计约为87亿)。这些新设备中的许多都将是电池供电(或能量采集)的嵌入式系统，在这些系统中，远程通信和低能耗对它们的成功至关重要。在设备需要小巧轻便的情况下，电池可以控制设备的大小和重量，这一点尤其正确。此外，对于远距离通信，可能需要中继器(中继无线信息以扩大范围的设备)，同样，低能耗操作将是关键。

The internet of things refers to the many devices that will be connected to the internet over the next number of years. According to various sources, the number of devices connected to the internet by 2020 is estimated to be from 26 to 50 billion (the number of all devices connected to the internet in 2012 was estimated to be around 8.7 billion). Many of these new devices will be battery powered (or energy harvested) embedded systems where long-range communcations and low-energy are crucial to their success. This is particularly true in cases where the devices needs to be small and light where the battery can dominate the size and weight of the device. In addition, for long-range communications, there will likely be a need for repeaters (devices that relay the wireless information to extend the range) and once again, low-energy operation will be critical.