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Vertical switching method based on dynamic weight optimization in heterogeneous network

A heterogeneous network and dynamic weight technology, applied in the field of vertical handover, can solve the problems of terminal handover blockage, reduced handover performance, and no consideration of dynamic changes in network conditions, etc.

Active Publication Date: 2017-08-18
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology

The utility function takes into account the power of the nodes and the loads of different access networks, but does not consider the dynamic changes of the network conditions, which may cause congestion at the terminal switching and reduce the switching performance

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  • Vertical switching method based on dynamic weight optimization in heterogeneous network
  • Vertical switching method based on dynamic weight optimization in heterogeneous network
  • Vertical switching method based on dynamic weight optimization in heterogeneous network

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Embodiment Construction

[0061] The technical solutions in the embodiments of the present invention will be described clearly and in detail below with reference to the drawings in the embodiments of the present invention. The described embodiments are only some of the embodiments of the invention.

[0062] The technical scheme that the present invention solves the above-mentioned technical problem is,

[0063] A vertical handover method based on dynamic weight optimization in a heterogeneous network, which designs the following vertical handover steps according to the dynamic changes in network conditions and the individual requirements of different service types of terminals for accessing the network:

[0064] 101. Acquire parameters of candidate networks, including: RSS, bandwidth, delay, service fee, and energy consumption. These parameters can be divided into two categories: benefit type and cost type, which are normalized respectively;

[0065] 102. The parameters normalized in step 101 are res...

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Abstract

The invention discloses a vertical switching method based on dynamic weight optimization in a heterogeneous wireless network. Aiming at the problems that the mobility of terminals and the time-varying characteristics of network states lead to dynamic performance, different service types have personalized requirements for networks, and poor vertical switching performance is caused, performance optimization is carried out from the following aspects: firstly, separately calculating subjective weights and objective weights of network parameters by using an analytic hierarchy process (AHP) and an entropy evaluation method, and initializing the combined weights based on a linear single objective optimization (SOP) theory; secondly, introducing weight adjustment factors, and dynamically adjusting the weight of each network parameter to adapt to the dynamic change performance of network conditions; and finally, selecting an optimum access network by adopting utility functions with adjustable switching thresholds based on the personalized requirements of a terminal. Experimental results show that by adopting the vertical switching method disclosed by the invention, the switching blocking rate and call drop rate of the terminal can be effectively reduced, unnecessary switching can be reduced, 'ping-pong effects' can be reduced, and the comprehensive performance of vertical switching can be improved.

Description

technical field [0001] The invention relates to a vertical handover method in a heterogeneous wireless network in the field of mobile communication, in particular to a method for vertical handover using dynamic weight optimization and a utility function with an adjustable handover threshold. Background technique [0002] In a heterogeneous wireless network, the handover that occurs when the MT connection is switched from one network to another is called vertical handover. Vertical handover technology is one of the key technologies of mobility management in heterogeneous wireless networks, which is directly related to the quality of service (QoS) of users. [0003] At present, most researches on vertical handover methods use multiple decision attributes related to the current network as decision indicators, and abstract the decision process of vertical handover as a multi-attribute decision-making problem. Therefore, in order to accurately describe and process these decision...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W36/14H04W36/30
CPCH04W36/14H04W36/30
Inventor 马彬邓红吴利平欧阳卫华
Owner CHONGQING UNIV OF POSTS & TELECOMM
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