A vertical handover method and device in a visible light-femtocell heterogeneous network

Abstract

The embodiment of the invention discloses a vertical handover method and apparatus in a visible light and Femto heterogeneous network. According to a bankruptcy credit distribution model in a cooperative game and a size of each parameter of each network, a weight coefficient of service providing capacity corresponding to each parameter of each network is determined, and according to a current service type of a user, by applying an analytic hierarchy process, a weight coefficient of an importance degree of each parameter for the current user is determined; and according to the weight coefficients of the service providing capacity and the weight coefficients of the importance degrees, weight coefficients of comprehensive performance of two networks are determined, the network of which the comprehensive performance has a greater weight coefficient is used as a target network, and when a network currently accessed to is not the target network, the network is handed over to the target network. The apparatus comprises a monitoring module, a calculating module, a locking module, and a decision handover module. According to the vertical handover method and apparatus in the visible light and Femto heterogeneous network, which are disclosed by the invention, continuity of data transmission is ensured, a ping-pong effect caused by frequent handover is reduced, service requests of the user are homogenized, and channel resources are reasonably distributed.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a vertical switching method and device in a visible light-home base station heterogeneous network. Background technique [0002] Visible light communication (visible light communication, VLC), as an emerging wireless communication technology, can organically combine communication and lighting, and realize high-speed data transmission at the same time with the help of a wide-coverage lighting network, so that it can be connected as long as there are lighting facilities. wireless network. Visible light communication has many advantages, such as: high transmission power, low energy consumption, no electromagnetic interference, excellent security, no need for radio spectrum certification, etc. However, the short wavelength of visible light results in short communication distance, impenetrable obstacles, and limited coverage. In the indoor environment, Femto, as an emer...

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Problems solved by technology

[0003] In order to ensure the communication quality in the visible light-femtocell heterogeneous network and avoid data transmission interruption, it is very important to propose a suitable vertical handover (VHO) method between VLC and Femto for the fusion of visible light communication heterogeneous networks; prior art In this method, the actual needs of users and the current quality of service of each network are not considered. Therefore, this method may affect the performance of the visible light-femtocell heterogeneous network, and may also affect the communication quality of users.

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