A Heterogeneous Wireless Network Load Balancing Method Based on Adjustable Predictive Service Bandwidth

Abstract

The invention relates to a service bandwidth adjustability prediction based heterogeneous wireless network load balancing method. The service bandwidth adjustability prediction based heterogeneous wireless network load balancing method comprises the steps of 1) establishing a seasonal moving average differential model; 2) calculating a prediction step length, obtaining a predicting moment of a call arrival rate and predicting the call arrival rate of the heterogeneous wireless network in the current time bucket through the seasonal moving average differential model so as to obtain the call arrival rate at the predicting moment; 3) selecting a target network to which a service is switched by adopting an SAW algorithm or by adopting an improved SAW algorithm based on the call arrival rate at the predicting moment; and 4) after the service is switched to the target network, establishing a power and exponential function transfer curve based on the call arrival rate at the predicting moment and adjusting a service access bandwidth nonlinearly. Compared with the prior art, the service bandwidth adjustability prediction based heterogeneous wireless network load balancing method has the advantages of balanced active load, accurate and scientific prediction algorithm, predictable bandwidth adjustment algorithm, rapid and effective load control, decreased fluctuation of load, low call blocking rate and the like.

Description

technical field [0001] The invention relates to a network load balancing method, in particular to a heterogeneous wireless network load balancing method based on predictive service bandwidth adjustable. Background technique [0002] Chinese Invention Patent Publication CN 103889001 A discloses an adaptive load balancing method based on future load prediction, which uses Markov chains to predict the network load at the next moment, thereby adaptively adjusting the threshold for triggering the load balancing method And a method model for access control; the method calculates the probability of light load or heavy load in the future through the load status before the network through the transition probability defined by the present invention, and the calculated probability is based on the load benefit defined by the present invention function to calculate the future load benefit value of the network. When a user in the network requests to switch access or initiate a new access...

AI Technical Summary

Problems solved by technology

[0003] This kind of load balancing strategy includes some common load balancing strategies. Most of them passively adjust the load balancing when the load is uneven. When the load is high, it is easy to cause load imbalance, and the call blocking rate increases. When the load is light, the utilization rate of network resources is low.

[0004] Currently, some service bandwidth adjustment strategies mostly use hierarchical adjustment methods to adjust service bandwidth, which cannot dynamically adjust service bandwidth according to real-time changes in network load, and when the network load is extremely high or extremely low, the classification is not detailed enough, resulting in insufficient load regulation, and Load fluctuations are not suppressed

[0005] The load of the heterogeneous wireless network is an inertial system, and the current service access will affect the future network load balancing

Existing switching algorithms do not consider the effect of load lag

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