Abstract
The spectral efficiency of wireless networks can be significantly improved by exploiting spatial multiplexing techniques known as multi-user MIMO. These techniques enable the allocation of multiple users to the same time-frequency block, thus reducing the interference between users. There is ample evidence that user groupings can have a significant impact on the performance of spatial multiplexing. The situation is even more complex when the data packets have priority and deadlines for delivery. Hence, combining packet queue management and beamforming would considerably enhance the overall system performance. In this paper, we propose a combination of beamforming and scheduling to improve the overall performance of multi-user MIMO systems in realistic conditions where data packets have both priority and deadlines beyond which they become obsolete. This method dubbed Reward Per Second (RPS), combines advanced matrix factorization at the physical layer with recently-developed queue management techniques. We demonstrate the merits of the this technique compared to other state-of-the-art scheduling methods through simulations.
Highlights
In recent years, the deployment of media-rich applications for mobile devices has increased
This challenge can only be addressed if channel throughput is increased and a proper scheduling mechanism that manages both priorities and deadlines is introduced into the network
To achieve the benefits of SDN orchestration, the base-stations or the C-RAN need to cross optimize the scheduling mechanism together with the physical layer beamforming [4,7,8,9] dealing with both priority and deadline constraints requires a new approach to user scheduling and resource allocation, which ensures that the scheduler and the physical layer are harmonized to optimize performance
Summary
The deployment of media-rich applications for mobile devices has increased. Enforcing low latency means that each packet has a deadline that needs to be met This challenge can only be addressed if channel throughput is increased and a proper scheduling mechanism that manages both priorities and deadlines is introduced into the network. Managing queues of packets aimed at independent users with different communication channels requires a cross-layer approach, as priorities and deadlines need to be measured against the effect of each user on other users grouped together. A simplified approach was presented in [39] where packets with priorities and deadlines were scheduled to static beams It is the goal of this paper to propose a cross-layer approach for scheduling and beamforming. We use a scheduling policy combined with the ZF beamforming technique to improve systems with traffic under a hard real-time environment, as well as priorities.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
