Wireless network virtualization method based on equivalent capacity in single-cell LTE-A system

Abstract

The invention belongs to the technical field of wireless network virtualization, and discloses a wireless network virtualization method based on equivalent capacity in a single-cell LTE-A system. The method comprises the following steps: introducing an LTE-A uplink system as a system model and a wireless channel as a Rayleigh channel; representing the Rayleigh channel through a finite state Markov model, dividing a channel state threshold to acquire a state transition probability matrix; computing a probability distribution of a service rate in a scheduling slot; computing equivalent capacity information when each service process selects each resource distribution mode in one scheduling slot; establishing a target function of a resource allocation model with the maximum system equivalent capacity; and solving out a channel allocation variable of the resource allocation model by use of a branch and a bound method. The problem that the data is inaccurate due to the time-variant characteristic and the attenuation characteristic of a wireless channel is solved. The customization service is provided for the services types in different varieties, the overall overhead for the deployment and the operation of a mobile cellular network is lowered.

Description

technical field [0001] The invention belongs to the technical field of wireless network virtualization, in particular to a wireless network virtualization method based on equivalent capacity, which can be used in a single-cell LTE-A system. Background technique [0002] With the rapid development of the Internet, the past network architecture has obviously fallen into a rigid state. Virtualization technology is an effective way to solve this problem and has become a hotspot in the research of next-generation Internet technology. Wireless network virtualization abstracts and isolates physical wireless infrastructure and radio spectrum resources into virtual resources to form a wireless virtual network for application by different virtual network operators. It can flexibly provide users with customized services and greatly reduce network deployment and running costs. At the same time, the wireless virtual network can operate independently, making it easier for new achievement...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the problems existing in the existing technology are: unlike the finite channel, the wireless channel is a complex time-varying channel, and its fading characteristics are greatly affected by the propagation environment, resulting in path propagation loss, shadow fading loss and Path loss such as multipath fading loss, in most wireless network virtualization studies, for the convenience of research, channel changes are ignored, and the channel does not change within a certain period of time by default, but this assumption is obviously unreasonable and cannot be based on channel Changes in real-time update resource allocation, dynamically adjust the allocation strategy, resulting in the situation that the allocation result does not match the actual channel, and at the same time, due to the random change of the channel, it also makes the calculation complicated when analyzing the channel state information in the process of resource allocation. high degree of problem

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