Research On Multiuser Scheduling Strategy In Cooperative Communication Networks

With the rapid development of modern wireless communication, people have put forward higher requirements for communication technology. In this information age, people urgently need good communication model and scheduling algorithm. The cooperative communication system this paper studies is a system which has a wide coverage and is cooperated by many wireless nodes which have individual antennas. Cooperative communication system deals with all the sending and receiving as a whole. It uses the channel fading characteristics to achieve multiuser diversity rather than eliminates fading between channels. And the only method to attain multiuser diversity is through scheduling.This paper focuses on the study of scheduling algorithm applied in multiuser cooperative communication to better improve the communication capacity of the system and to guarantee the Quality of Service. Concerning communication environment, we establish multiuser cooperative communication models to carry out simulation experiments and analyses channel capacity, bit error rate and fairness of resources assignment on users in order to evaluate the employed scheduling algorithm. We add delay factor to qualify the improved algorithm with continual scheduling performance and schedule link of better performance in scheduling. By comparing the simulation experiments, we verify that the improved algorithm is more applicable to multiuser cooperative communication and it better guarantees the Quality of Service and improves fairness.