Method, wireless network SDN controller and system for switching cells

A controller and wireless network technology, applied in the field of communication, can solve the problems of lack of centralized control of wireless resources, user terminal cell handover failure, etc.

Active Publication Date: 2016-07-06
CHINA TELECOM CORP LTD
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AI Technical Summary

Problems solved by technology

The 4th generation mobile communication system LTE-A (Long Term Evolution-Advanced) adopts a flat network architecture. In the existing technology, this flat network architecture integrating data and control plays an important role in mobility management. In addition to transmitting data, wireless access points have to complete all functions related to wireless resource management, including mobility management.
At the same time, due to the lack of centralized control of radio resources, the probability of user terminal cell handover failure is also high

Method used

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  • Method, wireless network SDN controller and system for switching cells
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  • Method, wireless network SDN controller and system for switching cells

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Embodiment Construction

[0055] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0056] The relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0057] figure 1 An embodiment of the method for cell handover of the present i...

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Abstract

The invention discloses a method, wireless network SDN controller and system for switching cells. The method comprises the following steps: when a measurement report sent by a user terminal is received and it is determined that a switching condition is satisfied, sending a switching request to a core network SDN controller; issuing corresponding uplink and downlink data flow table rules to object access points; issuing corresponding data forwarding flow table rules to source access points; sending switching indication to the user terminal through the source access points; when an air interface switching completion message sent by the user terminal through the object access points is received, sending a path conversion request to the core network SDN controller; and when the object access points receive all caching data forwarded by the source access points, indicating the source access points to delete the data forwarding flow table rules and releasing occupied wireless resources. According to the invention, by use of an SDN network architecture, data forwarding and route control are separated, the requirement for the transmission bandwidth between cells is reduced, and a unified platform is provided for cross-system switching.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method for cell switching, a wireless network SDN controller and a system. Background technique [0002] Wireless cell handover is the main form of mobility management in mobile communication systems. The 4th generation mobile communication system LTE-A (Long Term Evolution-Advanced) adopts a flat network architecture. In the existing technology, this flat network architecture integrating data and control plays an important role in mobility management. There is a defect in the aspect that the wireless access point has to complete all functions related to wireless resource management including mobility management in addition to transmitting data. When the user terminal moves and switches between cells, the network must transmit all information related to the user terminal between the wireless access points, which increases the bandwidth requirement between the wi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/00H04W36/08H04W36/30
Inventor 陆晓东
Owner CHINA TELECOM CORP LTD
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