A method for resource allocation and service access control based on virtual subnet

Abstract

The invention belongs to the field of communication technology, and discloses a method for resource allocation and service access control based on a virtual subnet. The MAC layer initializes a set of user service flow policies, calculates equivalent bandwidth information, and then counts the information of each user with QoS characteristics. Effective bandwidth request, build physical layer resource allocation model through equivalent bandwidth request, use branch and bound method to solve subchannel allocation matrix, then calculate QoS index and equivalent capacity information, build MAC layer service access model through equivalent capacity, The gradient iterative solution algorithm is used to maximize the utility function of the MAC layer, and the link segmentation variable and the service access variable of the service flow of the virtual network service user are obtained. The present invention can perform access control on multi-user and multi-service requirements through equivalent bandwidth and equivalent capacity in the uplink of the LTE-A system, and provide users with customized services under different maximum time delay constraints.

Description

technical field [0001] The invention belongs to the field of communication technology, and in particular relates to a resource allocation and service access control algorithm based on a virtual subnet, which can be used in a single-cell LTE-A system to perform access control for multi-user and multi-service requirements Background technique [0002] With the sharp increase in the contradiction between the inherent indeformation of mobile communication network design and the variability of users' rapidly increasing business needs, it is difficult for the simple traditional mobile communication system to meet the diverse needs of users in the future. Through the virtualization technology of wireless networks, Physical infrastructure and radio spectrum resources are abstracted, isolated, and shared. Mobile cellular network facilities can be separated from the services they provide and provide different services on the same physical facility. The overall cost of mobile cellular n...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the existing problems in the existing technology are: In the existing research on wireless network virtualization technology, the traditional method of researching service delay is to first estimate the parameters of the channel model, such as the service rate and service time. Mean and variance, and then extract the QoS characteristics from the constructed queuing model. Due to the time-varying and fading characteristics of the wireless channel, the channel is in a constantly changing state within a scheduling time slot. When calculating the mean and variance of the service rate and service time The calculation complexity is high, and the process of extracting the delay QoS characteristics by using queuing theory is obviously not easy to realize, and it is easy to cause the obtained data to be inaccurate during the estimation process. The existing research has not given an efficient and convenient way to meet the The user's delay QoS performance cannot provide users with more types and higher quality services in the virtual network. In addition, the existing research defaults to sufficient channel resources, which can fully access the user's service requests. This is different from the actual wireless communication. The scene does not match

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