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Routing selection method for software defined network

A software-defined network and selection algorithm technology, applied in data exchange networks, electrical components, digital transmission systems, etc., can solve the problem of unsolved core network allocation and routing, etc.

Active Publication Date: 2016-06-29
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The literature [ZhangSQ, ZhangQ, BannazadehH, etal.NetworkFunctionVirtualizationenabledmulticastroutingonSDN, Communications (ICC), 2015] proposed a graph theory-based SDN network routing algorithm, which is used in SDN multicast networks, and through network function virtualization technology, Realize the establishment of an appropriate multicast topology, but the algorithm does not solve the problem of assigning routes for the core network

Method used

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  • Routing selection method for software defined network
  • Routing selection method for software defined network
  • Routing selection method for software defined network

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Embodiment Construction

[0043] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0044] SDN uses OpenFlow to separate the control function from the forwarding function, and the remote controller completes the network control function. OpenFlow switches store flow tables for packet lookup and forwarding. The switch is connected to the external controller through the secure channel through the OpenFlow protocol to query and manage the flow table. The flow table includes header fields (Headerfields, matching multiple header fields), activity counters (Counters), and 0 or more execution actions (Actions). The OpenFlow switch searches for the packet, and if it matches, executes the relevant policy; otherwise, forwards the packet to the controller through a secure channel, and the controller executes the corresponding decision.

[0045] figure 1 Shown is a block diagram of an exemplary communication system according to an ...

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Abstract

The invention relates to a routing selection method for a software defined network, and belongs to the field of mobile communication technology. The method comprises the following steps: obtaining an SDN (Software Defined Network) connection diagram by a controller according to a user equipment (UE) routing request message; determining a candidate base station (BS), a candidate switch (SW) and a candidate link according to the business demand of the UE; and determining each link weight based on power consumption and a delay joint utility function, generating a network weighted graph, and determining a target routing based on a Dijkstra algorithm. According to the routing selection method provided by the invention, the business demand of the UE, the transmission rates of the BS and the SW,a power message and delay and other information are comprehensively considered, the optimized routing selection of the UE under SDN architecture is realized for jointly optimizing the routing power consumption and the delay, the network power consumption can be effectively saved, the delay is shortened and the network stability is improved.

Description

technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a software-defined network routing selection method. Background technique [0002] Software Defined Networks (Software Defined Networks, SDN) is a new innovative network platform based on OpenFlow proposed by Stanford University. The typical architecture of SDN is divided into three layers. The top layer is the application layer, including various services and applications; the middle layer is the control layer, which is mainly responsible for processing the arrangement of data forwarding device resources, maintaining network topology and status information, etc.; the bottom layer It is the data layer, which is mainly responsible for data processing, forwarding and state collection based on the flow table. The main features of SDN are separation of control plane and data plane, centralized network control, open network interface between control plane and data plane eq...

Claims

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Application Information

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IPC IPC(8): H04L12/721
CPCH04L45/12H04L45/38
Inventor 柴蓉胡恂陈前斌
Owner CHONGQING UNIV OF POSTS & TELECOMM
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