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Resource allocation method based on equivalent capacity in wireless virtual network

A technology of resource allocation and virtual network, which is applied in the direction of network traffic/resource management, wireless communication, electrical components, etc., can solve problems such as unsatisfactory communication requirements, high computational complexity, and slow solution process, and achieve simplified channel complexity, Ease of Solving and Measuring Accurate Effects

Active Publication Date: 2017-05-31
XIDIAN UNIV
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  • Application Information

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Problems solved by technology

[0003] Different service requests have different quality of service. The existing wireless virtual network mainly uses the concept of Shannon capacity to quantify resources, and uses theories such as queuing theory to measure its QOS quality; or through iteration, each After the second iteration, compare and judge with the delay constraint, and solve it, but the solution process is slow; or establish a nonlinear large-scale model, the modeling is complicated, and the computational complexity is too high; neither can meet the increasingly flexible and changeable communication needs

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  • Resource allocation method based on equivalent capacity in wireless virtual network
  • Resource allocation method based on equivalent capacity in wireless virtual network
  • Resource allocation method based on equivalent capacity in wireless virtual network

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Embodiment 1

[0024] When the existing wireless virtual network allocates resources, it mainly uses theories such as Shannon capacity and queuing theory, or through iteration, the solution process is slow; or the establishment of a nonlinear large-scale model is complex and the computational complexity is too high. Aiming at this current situation, the present invention conducts research, and proposes a resource allocation method based on equivalent capacity in a wireless virtual network, see figure 1 :

[0025] (1) Introduce the SC-FDMA uplink system as a wireless virtual network system model. The system includes a physical base station and multiple users. The base station and each user are equipped with a transmitting antenna and a receiving antenna respectively. The total physical bandwidth of the base station is The resources are divided into multiple resource blocks, and each resource block is composed of several subcarriers. The subcarriers are the physical resources to be allocated i...

Embodiment 2

[0036] The resource allocation method based on equivalent capacity in the wireless virtual network is the same as in embodiment 1, and the step (2a) is divided into different state spaces according to the threshold, that is, a new wireless fading channel model is generated:

[0037] In a typical propagation channel, the received signal experiences Rayleigh fading and additive Gaussian noise, for an average signal-to-noise ratio SNRγ 0 The received signal, the received instantaneous signal-to-noise ratio SNR is distributed with the following probability density function:

[0038]

[0039] where γ 0 is the average signal-to-noise ratio of the received signal, and γ is the instantaneous signal-to-noise ratio at the sampling moment of the received signal.

[0040] According to the division formula of signal-to-noise ratio SNR gate line in Rayleigh fading channel, obtain the threshold value of each state of signal-to-noise ratio in the channel; Use Γ=[Γ 1 ,Γ 2 ,…,Γ M+1 ] T ...

Embodiment 3

[0047] The resource allocation method based on equivalent capacity in the wireless virtual network is the same as in embodiment 1-2, and the statistical information of carrier resources is obtained in step (2b), specifically:

[0048] In the channel model, as shown in Figure (2), a scheduling time slot T s Consists of L frame slots, and the channel state is every time T f a change occurs; r l (i) represent the state information of the lth frame time slot in the i'th scheduling time slot; according to the division of the state space according to the present invention, the values ​​of all data rates are in a limited state space ψ={ψ 1 ,ψ 2 ,…,ψ M}, the value of the data rate ψ m vs. Received SNR Status¶ m There is a one-to-one correspondence between the two, and the value of the data rate is expressed as ψ m =Blog 2 (1 / γ m ). Let P(ψ) represent the space of transition probabilities of all states on the table ψ, the i-th scheduling of the l-th frame P i l The probabili...

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Abstract

The invention discloses a resource allocation method based on equivalent capacity in a wireless virtual network, for solving the problem of resource virtualization and distribution and service flow admission control. The method comprises the following steps: importing an SC-FDMA uplink system to serve as a wireless virtual network system; establishing a finite state Markoff channel model, and obtaining carrier resource statistical information; obtaining equivalent bandwidth information according to different service requests; giving a QOS index sequence to obtain equivalent capacity information; establishing an optimal resource allocation model according to the equivalent bandwidth information and the equivalent capacity information; and resolving the optimal resource allocation model by using a branch and bound method to obtain an optimal equivalent capacity resource allocation scheme. According to the resource allocation method disclosed by the invention, the resource measurement is more accurate and compact, the resource utilization rate is improved, a dynamic pricing mechanism is imported, so that the resource allocation between virtual networks is more balanced and rational, the access rate is high, the delay is shorter, a flexible and varied resource allocation scheme and admission control technology are provided, and a new technical scheme is provided for the implementation of virtual operators.

Description

technical field [0001] The present invention belongs to the technical field of communication, and in particular relates to a wireless virtual resource allocation method, in particular to a resource allocation method based on equivalent capacity in a wireless virtual network, which can be used in an SC-FDMA uplink system for multi-user multi-service Resource allocation and access control are required. Background technique [0002] With the continuous development of communication technology, the number and types of business requests are rapidly expanding and enriching, which greatly increases the pressure of various applications to compete for wireless resources. They not only have different resource requests, but also propose different service qualities. Requirements, so it is necessary to properly configure and manage the limited wireless resources. In order to solve this problem, wireless network virtualization came into being. Mobile network operators can use virtualizati...

Claims

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Application Information

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IPC IPC(8): H04W28/16H04W28/20
CPCH04W28/16H04W28/20
Inventor 卢小峰刘博文韩丛端赵丹萍范宁练籼汛
Owner XIDIAN UNIV
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