A load balancing method and device in an indoor visible light heterogeneous network

Abstract

Embodiments of the invention disclose a load balancing method and device in an indoor visible light heterogeneous network. A mobile terminal is covered by a plurality of visible light APs in an overlapped manner, the visible light AP realizes one load balancing method, when receiving multiple light power, the mobile terminal sends information to the visible light AP, the visible light AP sends the information to a visible light management unit, the visible light management unit calculates a parameter value of the visible light AP correspondingly covered under each terminal device and sends a request access terminal device list to the visible light AP with the maximal parameter value, the visible light management unit determines a current utility value of the visible light AP according to related information of the visible light AP, finds the terminal device with the utility value larger than a threshold and notifies the visible light AP to access the terminal device, the visible light AP sends an access signal to the terminal device, and the terminal device accesses the visible light AP. By adopting the load balancing method and device provided by the technical scheme in the embodiments of the invention, load balancing is realized, and the resource utilization rate is improved.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a load balancing method and device in an indoor visible light heterogeneous network. Background technique [0002] Visible light communication (VLC) system, as a promising indoor small cell system for 5G network, offers the potential of huge data transmission rate exceeding 3Gbps while meeting the demand of energy-saving lighting. In addition, visible light communication makes full use of the license-free spectrum bandwidth, which can offload the load of the radio frequency (RF) network and significantly increase the network capacity without additional electromagnetic interference. [0003] However, there are some potential disadvantages of a single VL network: [0004] 1) Since light propagates in line-of-sight, the performance is poor under non-line-of-sight conditions; [0005] 2) Due to the small coverage of visible light access nodes, terminal equipment will...

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Problems solved by technology

[0004] 1) Since light propagates in line-of-sight, the performance is poor under non-line-of-sight conditions;

[0005] 2) Due to the small coverage of visible light access nodes, terminal equipment will frequently switch within the coverage of visible light cells when moving;

[0006] 3) Due to the line-of-sight propagation characteristics of light, the visible light uplink channel is easily blocked, resulting in poor communication conditions for the uplink channel

[0008] In the VLC-LTE heterogeneous network in the prior art, when terminal equipment is accessed, it is based on the maximum reference signal received power (RSRP), but due to the scalability, handover overhead, and fairness of RSRP Limitation, not suitable for load balancing of heterogeneous networks

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