Priority distinguishing and dispatching method of heterogeneous flow in 4G network

Abstract

The invention discloses a priority distinguishing and dispatching method of heterogeneous flow in a 4G network. The priority distinguishing and dispatching method comprises the following steps: firstly, obtaining time delaying and packet loss rates of a user according to CQI fed back by the user and calculating a weighting coefficient; considering four factors including packet header time delaying, a queue length, a speed and a throughput to establish a mathematical model according to actual conditions of 4G transmission; finally, setting the weighting coefficient according to the level of flow priority and calculating a dispatching priority factor. According to the priority distinguishing and dispatching method disclosed by the invention, different dispatching priorities are distinguished according to the importance of a service flow; meanwhile, QoS (Quality of Service) indexes including the time delaying, the throughput, the packet loss rate and the like can also be considered, and the equality of dispatching is guaranteed. Under an LTE (Long Term Evolution)-Sim simulation environment, an MP-MLWDF (Multi-priorities-Modified Largest Wait Delay First) algorithm and an existing SQPS (Single-Queue Priority Scheduler) Algorithm are subjected to a comparison test and a simulation result shows that performances of the MP-MLWDF algorithm are remarkably 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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