A user request processing method based on software-defined network southbound interface protocol
A software-defined network, user-requested technology, applied in electrical components, wireless communication, etc., can solve the problems of difficult integration of heterogeneous networks, poor performance such as delay, and difficult to expand, and achieve flexible, fast and efficient processing, easy to expand, algorithmic simple effect
Inactive Publication Date: 2018-05-29
TSINGHUA UNIV
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Problems solved by technology
[0014] 1. Complicated upgrades: If a certain network element or a certain layer protocol of the user plane needs to be upgraded, such as adopting a new algorithm or protocol, the corresponding network element and layer protocol in the entire network must be upgraded, which will bring great inconvenience. Huge upgrade costs;
[0015] 2. It is difficult to support the fusion of heterogeneous radio access technologies (Radio Access Technologies, hereinafter referred to as RAT): In the existing network architecture, different RATs (such as LTE and wifi) have different user planes. The user plane cannot communicate at all, and can only interact through interfaces or tunnels provided by gateways, etc.
This makes the integration of heterogeneous RATs and heterogeneous networks very difficult, and performance such as delay is very poor.
[0016] Due to the above shortcomings, the algorithm for processing user requests in the current stacked architecture is relatively complex, difficult to expand, and less flexible
Method used
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[0030] The user request processing method based on the software-defined network southbound interface protocol proposed by the present invention, its flow chart is as follows figure 1 shown, including the following steps:
[0031] (1) According to the software-defined network southbound interface protocol, establish the first flow table requested by the user in wireless communication. The flow entries contained in the first flow table are timeout timers, counters, action sets, and matching domains. At the same time, establish a flow table for processing A plurality of second flow tables requested by the user, the flow entries contained in the second flow table are action sets, matching domains and priorities;
[0032] (2) Initialize the user request in the wireless communication, that is, clear the counter in the user request and clear the action set;
[0033] (3) according to the priority in the second flow table of step (1), according to the order of priority, the matching f...
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The invention relates to a user request processing method based on a software-defined network southing interface protocol, and belongs to the technical field of wireless communication. User request data and a module for processing a user request are redefined through concepts of flow items and flow tables in a software-defined network OpenFlow protocol. The user request reaches second flow tables and is matched with the second flow tables, whether matching items exist or not is judged, a counter in user flow is updated after matching is finished, an action set in the user flow is updated, after the user request is matched with the flow items in the second flow tables each time, whether a time-out timer in the user request exceeds the threshold value or not is judged, whether the user request is matched with other flow tables in the second flow tables or not is determined according to the judgment result, and finally, the corresponding action set is executed according to the actuating quantity in the user request. The method is low in complexity and easy to expand, the flexibility of a whole processing system is improved, and meanwhile the user experience quality is improved as well.
Description
technical field [0001] The invention relates to a user request processing method based on a southbound interface protocol of a software-defined network, and belongs to the technical field of wireless communication. Background technique [0002] Software-defined networking (hereinafter referred to as SDN) is a network virtualization technology. SDN uses the idea of layering to separate control and data. SDN is divided into data plane, control plane and application plane from bottom to top (or from south to north). The data plane and the control plane use the SDN control data plane interface (control-data-plane interface, hereinafter referred to as CDPI) to communicate. CDPI has a unified communication standard, and currently mainly adopts the OpenFlow protocol. The SDN northbound interface (NBI) is responsible for the communication between the control plane and the application plane. The NBI allows users to customize development according to actual needs. [0003] The co...
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IPC IPC(8): H04W24/02
CPCH04W24/02
Inventor 曾捷粟欣张黎刘莉莉赵明许希斌
Owner TSINGHUA UNIV