CN113766522A

CN113766522A - VLC-RF heterogeneous network deployment method, device, equipment and medium based on room division system

Info

Publication number: CN113766522A
Application number: CN202111157412.2A
Authority: CN
Inventors: 金宁; 陈晓冬; 李鹏翔; 杨智斌; 魏垚
Original assignee: China Telecom Corp Ltd
Current assignee: China Telecom Corp Ltd
Priority date: 2021-09-30
Filing date: 2021-09-30
Publication date: 2021-12-07
Anticipated expiration: 2041-09-30
Also published as: CN113766522B

Abstract

The present disclosure provides a VLC-RF heterogeneous network deployment method, apparatus, device and medium based on a room division system, wherein the method comprises: if the user terminal is detected to enter the communication range of the indoor distribution system, determining the energy efficiency value of the indoor distribution system and recording the energy efficiency value as a first energy efficiency value; sequentially replacing radio frequency links of a downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determining the experience quality of a user terminal on the VLC-RF heterogeneous network; when the experience quality after replacing the VLC link is detected to be larger than or equal to the preset quality, determining the energy efficiency value of the indoor distribution system again and recording the energy efficiency value as a second energy efficiency value; if the second energy efficiency value is larger than or equal to the first energy efficiency value, reserving the VLC-RF heterogeneous network; and if the second energy efficiency value is smaller than the first energy efficiency value or the experience quality after the VLC link is replaced is smaller than the preset quality, deploying the downlink as the radio frequency link. Through the embodiment of the disclosure, the communication performance of the indoor distribution system is improved, and the energy efficiency of the indoor distribution system is optimized.

Description

VLC-RF heterogeneous network deployment method, device, equipment and medium based on room division system

Technical Field

The present disclosure relates to the field of communications technologies, and in particular, to a VLC-RF heterogeneous network deployment method, apparatus, device, and medium based on a room division system.

Background

At present, with the popularization of mobile internet and the improvement of user requirements, indoor mobile services are more and more, with the formal business of 5G, it is more and more important to lay a high-quality and efficient 5G room distribution network, in the past 2G, 3G and 4G times, mobile networks are covered by using low frequency bands, and indoor signals are covered by building a traditional DAS (Direct-Attached Storage, open system Direct-connected Storage) room distribution system. With the development of mobile internet services, some scenes with large traffic and high traffic (such as campuses, hospitals, transportation hubs, and the like) start to use active room distribution systems.

In the related art, the 5G room subsystem has the disadvantages of difficult modification, high cost, high energy consumption and the like, and Visible Light Communication (VLC) has the advantages of high bandwidth, high speed, green energy saving and the like, can effectively improve the Communication performance of an indoor network, not only can meet the network requirement of increasing load capacity, but also can effectively reduce energy consumption, and has become a common access mode of the 5G room subsystem.

However, in the access scheme of the VLC based on the room division system, from the viewpoints of signal to noise ratio, simple information aggregation and the like, since the energy efficiency of the room division network may change due to the access of the VLC, the communication quality and the energy efficiency of the room division system cannot be balanced.

It is to be noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure, and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to provide a VLC-RF heterogeneous network deployment method, apparatus, device, and medium based on a room subsystem, which overcome, at least to some extent, the problems of inability to equalize communication quality and energy efficiency of the room subsystem due to limitations and disadvantages of the related art.

According to a first aspect of the embodiments of the present disclosure, there is provided a VLC-RF heterogeneous network deployment method based on a room division system, including: if the fact that the user terminal enters the communication range of the indoor distribution system is detected, determining an energy efficiency value of the indoor distribution system and recording the energy efficiency value as a first energy efficiency value; sequentially replacing the radio frequency link of the downlink with a VLC link to obtain a replaced VLC-RF heterogeneous network, and determining the experience quality of the user terminal on the VLC-RF heterogeneous network; when the experience quality after replacing the VLC link is detected to be larger than or equal to the preset quality, determining the energy efficiency value of the indoor distribution system again and recording the energy efficiency value as a second energy efficiency value; if the second energy efficiency value is determined to be larger than or equal to the first energy efficiency value, reserving deployment of the VLC-RF heterogeneous network; and if the second energy efficiency value is smaller than the first energy efficiency value or the experience quality after the VLC link is replaced is smaller than the preset quality, deploying the downlink as a radio frequency link.

In an exemplary embodiment of the present disclosure, sequentially replacing the radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determining the quality of experience of the user terminal for the VLC-RF heterogeneous network includes: determining n radio frequency links included in the downlink; reserving m radio frequency links in the n radio frequency links; sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network, wherein m is an integer smaller than n and larger than 0; determining a quality of experience of the user terminal for the VLC-RF heterogeneous network.

In an exemplary embodiment of the disclosure, determining the quality of experience of the user terminal for the VLC-RF heterogeneous network comprises: determining transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio of a downlink of the VLC-RF heterogeneous network; normalizing the transmission rate, the time delay, the throughput, the bit error rate, the received signal strength and the signal-to-noise ratio; carrying out weighted calculation on the normalized transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio; and determining the experience quality according to the result of the weighting calculation.

In an exemplary embodiment of the present disclosure, a sum of weight values for the weighted calculation of the normalized transmission rate, delay, throughput, bit error rate, received signal strength, and signal-to-noise ratio is 1.

In an exemplary embodiment of the present disclosure, sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network includes: and sequentially replacing the access points of the n-m radio frequency links with the access ends of the n-m VLC links to carry out visible light communication.

In an exemplary embodiment of the present disclosure, further comprising: detecting whether the network state or the user service state of the indoor distribution system changes; if the network state or the user service state is detected to be changed, triggering and detecting whether the user terminal enters a communication range of the indoor distribution system; and if the user terminal is detected to enter the communication range of the indoor subsystem, updating the VLC-RF heterogeneous network.

In an exemplary embodiment of the disclosure, determining the energy efficiency value of the indoor subsystem comprises: determining a sum of average throughputs of an uplink and a downlink of the indoor subsystem over a specified time period; determining energy consumption of the indoor subsystem over the specified time period; and determining the energy efficiency value according to the ratio of the sum of the average throughputs to the energy consumption.

According to a second aspect of the embodiments of the present disclosure, there is provided a VLC-RF heterogeneous network deployment apparatus based on a room division system, including: the determining module is set to determine the energy efficiency value of the indoor distribution system and record the energy efficiency value as a first energy efficiency value if the user terminal is detected to enter the communication range of the indoor distribution system; the determining module is further configured to sequentially replace the radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determine the quality of experience of the user terminal for the VLC-RF heterogeneous network; the determining module is further configured to determine the energy efficiency value of the indoor subsystem again and record the energy efficiency value as a second energy efficiency value when detecting that the experience quality after the VLC link is replaced is greater than or equal to the preset quality; the determining module is further configured to, if it is determined that the second energy efficiency value is greater than or equal to the first energy efficiency value, reserve deployment of the VLC-RF heterogeneous network; the determining module is further configured to deploy the downlink as a radio frequency link if it is determined that the second energy efficiency value is smaller than the first energy efficiency value or the quality of experience after replacing the VLC link is smaller than the preset quality.

According to a third aspect of the present disclosure, there is provided an electronic device comprising: a memory; and a processor coupled to the memory, the processor configured to perform the method of any of the above based on instructions stored in the memory.

According to a fourth aspect of the present disclosure, there is provided a computer-readable storage medium, on which a program is stored, which when executed by a processor, implements the VLC-RF heterogeneous network deployment method based on a room division system as set forth in any one of the above.

According to the embodiment of the disclosure, the radio frequency link of the downlink is sequentially replaced by the VLC link to obtain the replaced VLC-RF heterogeneous network, and the experience quality and the energy efficiency value of the user terminal for the VLC-RF heterogeneous network are determined to be compared, so that the communication quality and the reliability of the indoor distribution system are improved, the energy efficiency of the indoor distribution system is optimized, and the communication performance and the system energy efficiency are balanced.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It is to be understood that the drawings in the following description are merely exemplary of the disclosure, and that other drawings may be derived from those drawings by one of ordinary skill in the art without the exercise of inventive faculty.

FIG. 1 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in an exemplary embodiment of the present disclosure;

FIG. 2 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 3 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 4 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 5 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 6 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 7 is a flow chart of a VLC-RF heterogeneous network deployment method based on a room division system in another exemplary embodiment of the present disclosure;

FIG. 8 is a block diagram of a VLC-RF heterogeneous network deployment device based on a room-division system in an exemplary embodiment of the present disclosure;

FIG. 9 is an architectural diagram of a VLC-RF heterogeneous network deployment scheme based on a room-division system in an exemplary embodiment of the present disclosure;

FIG. 10 is a block diagram of an electronic device in an exemplary embodiment of the disclosure.

Detailed Description

Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the disclosure. One skilled in the relevant art will recognize, however, that the subject matter of the present disclosure can be practiced without one or more of the specific details, or with other methods, components, devices, steps, and the like. In other instances, well-known technical solutions have not been shown or described in detail to avoid obscuring aspects of the present disclosure.

Further, the drawings are merely schematic illustrations of the present disclosure, in which the same reference numerals denote the same or similar parts, and thus, a repetitive description thereof will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities. These functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor devices and/or microcontroller devices.

The following detailed description of exemplary embodiments of the disclosure refers to the accompanying drawings.

Fig. 1 is a flowchart of a VLC-RF heterogeneous network deployment method based on a room division system in an exemplary embodiment of the present disclosure.

Referring to fig. 1, a VLC-RF heterogeneous network deployment method based on a room division system may include:

step S102, if it is detected that the user terminal enters the communication range of the indoor distribution system, the energy efficiency value of the indoor distribution system is determined and recorded as a first energy efficiency value.

And step S104, sequentially replacing the radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determining the experience quality of the user terminal on the VLC-RF heterogeneous network.

And step S106, determining the energy efficiency value of the indoor subsystem again and recording the energy efficiency value as a second energy efficiency value when detecting that the experience quality after the VLC link is replaced is greater than or equal to the preset quality.

And step S108, if the second energy efficiency value is determined to be larger than or equal to the first energy efficiency value, reserving deployment of the VLC-RF heterogeneous network.

Step S110, if it is determined that the second energy efficiency value is smaller than the first energy efficiency value, or the quality of experience after replacing the VLC link is smaller than the preset quality, deploying the downlink as a radio frequency link.

In an exemplary embodiment of the present disclosure, the VLC-RF heterogeneous network is based on deployment of a downlink of the indoor subsystem, that is, the downlink includes a VLC link and an RF link, where the RF link is a radio frequency communication link used by a cellular base station accessing a core network, and the cellular base station may be an indoor routing device or a routing node.

In an exemplary embodiment of the disclosure, the VLC-RF heterogeneous network includes at least one downlink RF link, which overcomes the problem of communication interruption caused by blocking of optical signals.

Hereinafter, each step of the VLC-RF heterogeneous network deployment method based on the room distribution system will be described in detail.

In an exemplary embodiment of the present disclosure, as shown in fig. 2, sequentially replacing the radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determining the quality of experience of the user terminal for the VLC-RF heterogeneous network includes:

step S202, determining n radio frequency links included in the downlink.

Step S204, reserving m radio frequency links in the n radio frequency links.

And S206, sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network, wherein m is an integer smaller than n and larger than 0.

Step S208, determining the experience quality of the user terminal for the VLC-RF heterogeneous network.

In an exemplary embodiment of the present disclosure, the radio frequency link is replaced with VLC links in sequence according to the following steps:

step (1), firstly accessing 1 RF downlink channel, and the rest n-1 are all VLC channels. And measuring QoE standard values of the current subsystem, and recording the QoE standard values as Qt.

And (2) comparing whether Qt is greater than or equal to a set QoE threshold Q.

And (3) if Qt is greater than or equal to QoE threshold Q, indicating that the VLC-RF heterogeneous network meets the QoE requirement, wherein the VLC-RF heterogeneous network comprises 1 downlink RF channel and n-1 downlink VLC channels.

And (4) if Qt is smaller than QoE threshold Q, reducing the number of downlink VLC channels by one, increasing the number of downlink RF channels by one, and circularly executing the steps (2) - (3).

And (5) if the VLC channel of the downlink is reduced to 0 and Qt is less than QoE threshold Q, the downlink all adopts an RF link for communication.

In an exemplary embodiment of the present disclosure, as shown in fig. 3, determining the quality of experience of the user terminal for the VLC-RF heterogeneous network includes:

step S302, determining the transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio of the downlink of the VLC-RF heterogeneous network.

Step S304, the transmission rate, the time delay, the throughput, the error rate, the received signal strength and the signal-to-noise ratio are normalized.

And step S306, carrying out weighted calculation on the normalized transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio.

Step S308, determining the experience quality according to the result of the weighting calculation.

In an exemplary embodiment of the present disclosure, six parameters, namely transmission rate Ra, time delay De, throughput T, bit error rate Bler, received signal strength Rss and signal-to-noise ratio SNR, are obtained, and a calculation formula of the standard value Qt is as follows:

Qt＝a1×RaN+a2×DeN+a3×TN+a4×BlerN+a5×RssN+a6×SNRN。

the a1, a2, a. + a6 are weight values, the sum of the values is 1, that is, a1+ a2+ ·+ a6 is 1, and the weight value of each parameter is determined according to different service requirements.

Aiming at the difference of the six parameter dimensions, before calculating the Qt value, normalization processing is carried out on each parameter, and the Ran, the Den, the TN, the Blern, the RssN and the SNRN are respectively the transmission rate, the time delay, the throughput, the error rate, the received signal strength and the signal-to-noise ratio after normalization. In the normalization process, due to the fact that incremental quantity and decremental quantity exist at the same time, attention needs to be paid to normalization calculation of parameters by using different formulas, specific values of the parameters are mapped to a [0, 1] area, and finally, the Qt value is also a numerical value between [0, 1], and the Qt is closer to 1, which indicates that the QoE is higher.

The QoE standard value threshold is set according to communication scenes, network arrangement conditions, user service characteristics and the like, the actual QoE standard value is compared with the threshold, and if the actual QoE standard value is larger than or equal to the threshold, the user requirement is met, so that a satisfactory communication network can be provided for users.

In an exemplary embodiment of the present disclosure, as shown in fig. 4, sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network includes:

and S402, sequentially replacing the access points of the n-m radio frequency links with the access ends of the n-m VLC links to carry out visible light communication.

In an exemplary embodiment of the present disclosure, as shown in fig. 5, the VLC-RF heterogeneous network deployment method based on the room subsystem further includes:

step S502, detecting whether the network state or the user service state of the indoor distribution system changes.

Step S504, if detecting the network state or the user service state changes, triggering and detecting whether the user terminal enters the communication range of the indoor subsystem.

Step S506, if it is detected that the user terminal enters the communication range of the indoor subsystem, updating the VLC-RF heterogeneous network.

In the above embodiment, if it is detected that the network status or the user service status changes and it is detected that the user terminal enters the communication range of the indoor subsystem, the VLC-RF heterogeneous network is updated according to the steps S102 to S110.

In an exemplary embodiment of the present disclosure, as shown in fig. 6, determining the energy efficiency value of the indoor subsystem includes:

step S602, determining the sum of the average throughputs of the uplink and the downlink of the indoor subsystem in a specified time period.

Step S604, determining the energy consumption of the indoor subsystem in the designated time period.

Step S606, determining the energy efficiency value according to the ratio of the sum of the average throughputs and the energy consumption.

In an exemplary embodiment of the present disclosure, as shown in fig. 7, the VLC-RF heterogeneous network deployment method based on the room subsystem further includes:

step S702, a first effective value E1 of a radio frequency link only adopted by a downlink is measured.

Step S704, determining whether the user enters the visible light range, if yes, performing step S706, and if not, performing step S722.

Step S706, the indoor subsystem descends n channels, reserves m radio frequency channels, and accesses n-m VLC channels.

And step S708, measuring and calculating the current QoE standard value Qt.

Step S710, determining the quality of experience according to the result of the weighting calculation.

In step S712, it is determined whether Qt is greater than or equal to the QoE threshold, if yes, step S714 is performed, and if no, step S720 is performed.

And step S714, measuring an energy efficiency value E2 of the current subsystem.

In step S716, a determination is made as to whether E2 is greater than or equal to E1.

Step S718, deploy a VLC-RF heterogeneous network which comprises m radio frequency channels and accesses n-m VLC channels.

In step S720, n-m is equal to n-m-1, and n-m is determined to be greater than 0, if yes, step S706 is executed, and if no, step S722 is executed.

In step S722, data is transmitted downstream using only the RF link.

Step S724, determining that the network status and/or the user service status change, if yes, executing step S702, and if no, ending.

Corresponding to the method embodiment, the present disclosure further provides a VLC-RF heterogeneous network deployment apparatus based on a room division system, which may be used to execute the method embodiment.

Fig. 8 is a block diagram of a VLC-RF heterogeneous network deployment device based on a room division system in an exemplary embodiment of the present disclosure.

Referring to fig. 8, the VLC-RF heterogeneous network deployment apparatus 800 based on a room division system may include:

the determining module 802 is configured to determine an energy efficiency value of the indoor subsystem and record the energy efficiency value as a first energy efficiency value if it is detected that the user terminal enters a communication range of the indoor subsystem.

The determining module 802 is further configured to sequentially replace the radio frequency link of the downlink with a VLC link to obtain a replaced VLC-RF heterogeneous network, and determine the quality of experience of the user terminal for the VLC-RF heterogeneous network.

The determining module 802 is further configured to determine the energy efficiency value of the indoor subsystem again and record the energy efficiency value as a second energy efficiency value when detecting that the quality of experience after replacing the VLC link is greater than or equal to the preset quality.

The determining module 802 is further configured to, if it is determined that the second energy efficiency value is greater than or equal to the first energy efficiency value, reserve deployment of the VLC-RF heterogeneous network.

The determining module 802 is further configured to deploy the downlink as a radio frequency link if it is determined that the second energy efficiency value is smaller than the first energy efficiency value or the quality of experience after replacing the VLC link is smaller than the preset quality.

In an exemplary embodiment of the disclosure, the determining module 802 is further configured to: determining n radio frequency links included in the downlink; reserving m radio frequency links in the n radio frequency links; sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network, wherein m is an integer smaller than n and larger than 0; determining a quality of experience of the user terminal for the VLC-RF heterogeneous network.

In an exemplary embodiment of the disclosure, the determining module 802 is further configured to: determining transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio of a downlink of the VLC-RF heterogeneous network; normalizing the transmission rate, the time delay, the throughput, the bit error rate, the received signal strength and the signal-to-noise ratio; carrying out weighted calculation on the normalized transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio; and determining the experience quality according to the result of the weighting calculation.

In an exemplary embodiment of the disclosure, the determining module 802 is further configured to: detecting whether the network state or the user service state of the indoor distribution system changes; if the network state or the user service state is detected to be changed, triggering and detecting whether the user terminal enters a communication range of the indoor distribution system; and if the user terminal is detected to enter the communication range of the indoor subsystem, updating the VLC-RF heterogeneous network.

In an exemplary embodiment of the disclosure, the determining module 802 is further configured to: determining a sum of average throughputs of an uplink and a downlink of the indoor subsystem over a specified time period; determining energy consumption of the indoor subsystem over the specified time period; and determining the energy efficiency value according to the ratio of the sum of the average throughputs to the energy consumption.

In an exemplary embodiment of the disclosure, the determining module 802 is further configured to: and sequentially replacing the access points of the n-m radio frequency links with the access ends of the n-m VLC links to carry out visible light communication.

As shown in fig. 9, the VLC-RF heterogeneous network deployment scheme based on a room subsystem includes a base station 902 and a room subsystem 904, the room subsystem includes a coordinator and a plurality of user terminals, such as a first user terminal UE1, a second user terminal UE2 and a third user terminal UE3, but is not limited thereto, the coordinator can perform all the steps and functions of the above determination module 802, and the coordinator implements VLC-RF heterogeneous network deployment by deploying a VLC AP and a cellular base station RF, and monitoring communication quality and energy efficiency.

Since the functions of the VLC-RF heterogeneous network deployment apparatus 800 based on the indoor subsystem have been described in detail in the corresponding method embodiments, the detailed description of the disclosure is omitted here.

It should be noted that although in the above detailed description several modules or units of the device for action execution are mentioned, such a division is not mandatory. Indeed, the features and functionality of two or more modules or units described above may be embodied in one module or unit, according to embodiments of the present disclosure. Conversely, the features and functions of one module or unit described above may be further divided into embodiments by a plurality of modules or units.

In an exemplary embodiment of the present disclosure, an electronic device capable of implementing the above method is also provided.

As will be appreciated by one skilled in the art, aspects of the present invention may be embodied as a system, method or program product. Thus, various aspects of the invention may be embodied in the form of: an entirely hardware embodiment, an entirely software embodiment (including firmware, microcode, etc.) or an embodiment combining hardware and software aspects that may all generally be referred to herein as a "circuit," module "or" system.

An electronic device 1000 according to this embodiment of the invention is described below with reference to fig. 10. The electronic device 1000 shown in fig. 10 is only an example, and should not bring any limitation to the functions and the scope of use of the embodiments of the present invention.

As shown in fig. 10, the electronic device 1000 is embodied in the form of a general purpose computing device. The components of the electronic device 1000 may include, but are not limited to: the at least one processing unit 1010, the at least one memory unit 1020, and a bus 1030 that couples various system components including the memory unit 1020 and the processing unit 1010.

Wherein the storage unit stores program code that is executable by the processing unit 1010 to cause the processing unit 1010 to perform steps according to various exemplary embodiments of the present invention as described in the "exemplary methods" section above in this specification. For example, the processing unit 1010 may perform a method as shown in embodiments of the present disclosure.

The storage unit 1020 may include readable media in the form of volatile memory units, such as a random access memory unit (RAM)10201 and/or a cache memory unit 10202, and may further include a read-only memory unit (ROM) 10203.

The memory unit 1020 may also include a program/utility 10204 having a set (at least one) of program modules 10205, such program modules 10205 including, but not limited to: an operating system, one or more application programs, other program modules, and program data, each of which, or some combination thereof, may comprise an implementation of a network environment.

Bus 1030 may be any one or more of several types of bus structures including a memory unit bus or memory unit controller, a peripheral bus, an accelerated graphics port, a processing unit, and a local bus using any of a variety of bus architectures.

The electronic device 1000 may also communicate with one or more external devices 1040 (e.g., keyboard, pointing device, bluetooth device, etc.), with one or more devices that enable a user to interact with the electronic device 1000, and/or with any devices (e.g., router, modem, etc.) that enable the electronic device 1000 to communicate with one or more other computing devices. Such communication may occur through input/output (I/O) interfaces 1050. Also, the electronic device 1000 may communicate with one or more networks (e.g., a Local Area Network (LAN), a Wide Area Network (WAN), and/or a public network such as the internet) via the network adapter 1060. As shown, the network adapter 1060 communicates with the other modules of the electronic device 1000 over the bus 1030. It should be appreciated that although not shown, other hardware and/or software modules may be used in conjunction with the electronic device 1000, including but not limited to: microcode, device drivers, redundant processing units, external disk drive arrays, RAID systems, tape drives, and data backup storage systems, among others.

Through the above description of the embodiments, those skilled in the art will readily understand that the exemplary embodiments described herein may be implemented by software, or by software in combination with necessary hardware. Therefore, the technical solution according to the embodiments of the present disclosure may be embodied in the form of a software product, which may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, etc.) or on a network, and includes several instructions to enable a computing device (which may be a personal computer, a server, a terminal device, or a network device, etc.) to execute the method according to the embodiments of the present disclosure.

In an exemplary embodiment of the present disclosure, there is also provided a computer-readable storage medium having stored thereon a program product capable of implementing the above-described method of the present specification. In some possible embodiments, aspects of the invention may also be implemented in the form of a program product comprising program code means for causing a terminal device to carry out the steps according to various exemplary embodiments of the invention described in the above section "exemplary methods" of the present description, when said program product is run on the terminal device.

The program product for implementing the above method according to an embodiment of the present invention may employ a portable compact disc read only memory (CD-ROM) and include program codes, and may be run on a terminal device, such as a personal computer. However, the program product of the present invention is not limited in this regard and, in the present document, a readable storage medium may be any tangible medium that can contain, or store a program for use by or in connection with an instruction execution system, apparatus, or device.

The program product may employ any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. A readable storage medium may be, for example, but not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the foregoing. More specific examples (a non-exhaustive list) of the readable storage medium include: an electrical connection having one or more wires, a portable disk, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

A computer readable signal medium may include a propagated data signal with readable program code embodied therein, for example, in baseband or as part of a carrier wave. Such a propagated data signal may take many forms, including, but not limited to, electro-magnetic, optical, or any suitable combination thereof. A readable signal medium may also be any readable medium that is not a readable storage medium and that can communicate, propagate, or transport a program for use by or in connection with an instruction execution system, apparatus, or device.

Program code embodied on a readable medium may be transmitted using any appropriate medium, including but not limited to wireless, wireline, optical fiber cable, RF, etc., or any suitable combination of the foregoing.

Program code for carrying out operations for aspects of the present invention may be written in any combination of one or more programming languages, including an object oriented programming language such as Java, C + + or the like and conventional procedural programming languages, such as the "C" programming language or similar programming languages. The program code may execute entirely on the user's computing device, partly on the user's device, as a stand-alone software package, partly on the user's computing device and partly on a remote computing device, or entirely on the remote computing device or server. In the case of a remote computing device, the remote computing device may be connected to the user computing device through any kind of network, including a Local Area Network (LAN) or a Wide Area Network (WAN), or may be connected to an external computing device (e.g., through the internet using an internet service provider).

Furthermore, the above-described figures are merely schematic illustrations of processes involved in methods according to exemplary embodiments of the invention, and are not intended to be limiting. It will be readily understood that the processes shown in the above figures are not intended to indicate or limit the chronological order of the processes. In addition, it is also readily understood that these processes may be performed synchronously or asynchronously, e.g., in multiple modules.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A VLC-RF heterogeneous network deployment method based on a room subsystem is characterized in that an uplink of the room subsystem is a radio frequency link, a downlink of the room subsystem comprises at least one radio frequency link, and the VLC-RF heterogeneous network deployment method based on the room subsystem comprises the following steps:

if the fact that the user terminal enters the communication range of the indoor distribution system is detected, determining an energy efficiency value of the indoor distribution system and recording the energy efficiency value as a first energy efficiency value;

sequentially replacing the radio frequency link of the downlink with a VLC link to obtain a replaced VLC-RF heterogeneous network, and determining the experience quality of the user terminal on the VLC-RF heterogeneous network;

when the experience quality after replacing the VLC link is detected to be larger than or equal to the preset quality, determining the energy efficiency value of the indoor distribution system again and recording the energy efficiency value as a second energy efficiency value;

if the second energy efficiency value is determined to be larger than or equal to the first energy efficiency value, reserving deployment of the VLC-RF heterogeneous network;

and if the second energy efficiency value is smaller than the first energy efficiency value or the experience quality after the VLC link is replaced is smaller than the preset quality, deploying the downlink as a radio frequency link.

2. The method for deploying a VLC-RF heterogeneous network based on a room subsystem according to claim 1, wherein sequentially replacing radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determining the quality of experience of the user terminal with respect to the VLC-RF heterogeneous network comprises:

determining n radio frequency links included in the downlink;

reserving m radio frequency links in the n radio frequency links;

sequentially replacing n-m radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network, wherein m is an integer smaller than n and larger than 0;

determining a quality of experience of the user terminal for the VLC-RF heterogeneous network.

3. The method for deploying a VLC-RF heterogeneous network based on a room subsystem according to claim 1, wherein determining the quality of experience of the user terminal with respect to the VLC-RF heterogeneous network comprises:

determining transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio of a downlink of the VLC-RF heterogeneous network;

normalizing the transmission rate, the time delay, the throughput, the bit error rate, the received signal strength and the signal-to-noise ratio;

carrying out weighted calculation on the normalized transmission rate, time delay, throughput, bit error rate, received signal strength and signal-to-noise ratio;

and determining the experience quality according to the result of the weighting calculation.

4. The room division system based VLC-RF heterogeneous network deployment method of claim 3,

the sum of the weighted values obtained by carrying out the weighted calculation on the normalized transmission rate, the normalized time delay, the normalized throughput, the normalized bit error rate, the normalized received signal strength and the normalized signal-to-noise ratio is 1.

5. The method for deploying a VLC-RF heterogeneous network based on a indoor subsystem as claimed in claim 2, wherein sequentially replacing n-m of said radio frequency links with VLC links to obtain a replaced VLC-RF heterogeneous network comprises:

and sequentially replacing the access points of the n-m radio frequency links with the access ends of the n-m VLC links to carry out visible light communication.

6. The room division system based VLC-RF heterogeneous network deployment method of any one of claims 1-5, further comprising:

detecting whether the network state or the user service state of the indoor distribution system changes;

if the network state or the user service state is detected to be changed, triggering and detecting whether the user terminal enters a communication range of the indoor distribution system;

and if the user terminal is detected to enter the communication range of the indoor subsystem, updating the VLC-RF heterogeneous network.

7. The room-subsystem-based VLC-RF heterogeneous network deployment method of any one of claims 1-5, wherein determining energy efficiency values for the room subsystem comprises:

determining a sum of average throughputs of an uplink and a downlink of the indoor subsystem over a specified time period;

determining energy consumption of the indoor subsystem over the specified time period;

and determining the energy efficiency value according to the ratio of the sum of the average throughputs to the energy consumption.

8. A VLC-RF heterogeneous network deployment device based on a room division system is characterized by comprising:

the determining module is set to determine the energy efficiency value of the indoor distribution system and record the energy efficiency value as a first energy efficiency value if the user terminal is detected to enter the communication range of the indoor distribution system;

the determining module is further configured to sequentially replace the radio frequency links of the downlink with VLC links to obtain a replaced VLC-RF heterogeneous network, and determine the quality of experience of the user terminal for the VLC-RF heterogeneous network;

the determining module is further configured to determine the energy efficiency value of the indoor subsystem again and record the energy efficiency value as a second energy efficiency value when detecting that the experience quality after the VLC link is replaced is greater than or equal to the preset quality;

the determining module is further configured to, if it is determined that the second energy efficiency value is greater than or equal to the first energy efficiency value, reserve deployment of the VLC-RF heterogeneous network;

the determining module is further configured to deploy the downlink as a radio frequency link if it is determined that the second energy efficiency value is smaller than the first energy efficiency value or the quality of experience after replacing the VLC link is smaller than the preset quality.

9. An electronic device, comprising:

a memory; and

a processor coupled to the memory, the processor configured to execute the room-subsystem based VLC-RF heterogeneous network deployment method of any of claims 1-7 based on instructions stored in the memory.

10. A computer-readable storage medium on which a program is stored, which when executed by a processor, implements the VLC-RF heterogeneous network deployment method based on a room division system according to any one of claims 1 to 7.