pport of UEs that operate only on a fraction of the carrier bandwidth, like narrowband IoT devices. Efficient scheduling of LLC is rather challenging as such traffic is typically bursty and random, and requires immediate scheduling with a short transmission time to fulfill the corresponding latency budget. Instead of pre-reserving radio resources for LLC traffic bursts, it is proposed to use preemptive scheduling. Figures 10.50 and 10.51 illustrate the principle of preemptive scheduling for efficient transmission of LLC traffic. The basic principle is as follows: mobile broadband traffic is scheduled on all the available radio resource. Once an LLC packet arrives at the base station, the MAC scheduler immedi- ately transmits it to the designated device by overwriting part of an ongoing scheduled transmission, using mini-slot transmission. This has the advantage that the LLC pay- load is transmitted immediately without waiting for ongoing scheduled transmissions to be completed, and without the need for pre-reserving radio resources for LLC traf- fic. The price of preemptive scheduling is paid by the user, parts of whose transmission are overwritten. To minimize the impact on the user that experiences the preemption, related recovery mechanisms are introduced. These include an indication to the victim device that part of its transmission has been preempted. This enables the terminal to take this effect into account when decoding the transmission; that is, it knows that part of the transmission is corrupted. Moreover, options for smart HARQ retransmission options are considered, where the damaged part of the preempted transmission is first retransmitted. We show next that the flexible 5G design together with agile scheduler allows the tough performance requirements to be fulfilled. Results from system-level simulations are presented to illustrate the benefits of some of the 5G scheduling enhancements. We first show mobile broadband performance results for file download over the Transmis- sion Control Protocol (TCP)