A priority-based scheduling method for heterogeneous flows in 4G networks

Abstract

The invention discloses a scheduling method for priority distinction of heterogeneous streams in a 4G network, which includes first obtaining the user's time delay and packet loss rate and calculating the weighting coefficient according to the CQI fed back by the user, and then according to the actual situation of 4G transmission, Considering the four factors of packet header delay, queue length, rate, and throughput, a mathematical model is established. Finally, according to the flow priority, the weight coefficient is set respectively, and the scheduling priority factor is calculated. The invention distinguishes different scheduling priorities according to the importance of business flows, and can also consider QoS indicators such as time delay, throughput, packet loss rate, etc., and ensures the fairness of scheduling. In the LTE-Sim simulation environment, the MP-MLWDF algorithm is compared with the existing SQPS. The simulation results show that the performance of the MP-MLWDF algorithm has been significantly improved.

Description

technical field [0001] The invention belongs to the technical field of computer wireless communication networks, and in particular relates to a priority-discriminating scheduling method for heterogeneous flows in a 4G network. Background technique [0002] With the development of the LTE (Long Term Evolution) network, its high-speed, low-latency and other characteristics have effectively improved the user's mobile service experience and can better meet the user's business needs. As the leading technology of the new generation of broadband wireless mobile communications, LTE has been rapidly commercialized around the world. At the same time, with the diversified development of various multimedia services such as high-definition voice, web pages, and videos, it has become a new trend to differentiate the priorities of different services to provide QoS (Quality of Service) guarantees. [0003] Although the performance of the 4G system has been greatly improved, it still requir...

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Problems solved by technology

[0004] However, the above-mentioned scheduling algorithms belong to the system-level scheduling and are not suitable for real-time flows, and these scheduling algorithms do not take into account the needs of business flow priority scheduling

Prioritized scheduling is an important technology to ensure the effectiveness and practicability of wireless networks. However, the traditional prioritized scheduling algorithm is difficult to guarantee the delay and throughput due to the lack of scientific allocation of QoS parameters or other reasons. Other QoS indicators

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