Grant-Free Random Access in Machine-Type Communication: Approaches and Challenges
Grant-Free Random Access in Machine-Type Communication: Approaches and Challenges
Massive machine-type communication (MTC) is expected to play a key role in supporting Internet of Things (IoT) applications such as smart cities, smart factories, and connected vehicles through cellular networks. MTC is characterized by a large number of MTC devices and their sparse activities, which are difficult to be supported …