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WO2017185380A1 - 一种基于可见光的通信方法、相关设备及系统 - Google Patents

一种基于可见光的通信方法、相关设备及系统 Download PDF

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Publication number
WO2017185380A1
WO2017185380A1 PCT/CN2016/080842 CN2016080842W WO2017185380A1 WO 2017185380 A1 WO2017185380 A1 WO 2017185380A1 CN 2016080842 W CN2016080842 W CN 2016080842W WO 2017185380 A1 WO2017185380 A1 WO 2017185380A1
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WIPO (PCT)
Prior art keywords
vpan
coordinator
information
neighbor
message
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PCT/CN2016/080842
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English (en)
French (fr)
Inventor
董晨
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP16899891.2A priority Critical patent/EP3442138B1/en
Priority to KR1020187034516A priority patent/KR102128358B1/ko
Priority to CN201680085044.6A priority patent/CN109075860B/zh
Priority to PCT/CN2016/080842 priority patent/WO2017185380A1/zh
Priority to JP2018556793A priority patent/JP6727332B2/ja
Publication of WO2017185380A1 publication Critical patent/WO2017185380A1/zh
Priority to US16/172,544 priority patent/US10666356B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1149—Arrangements for indoor wireless networking of information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/116—Visible light communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
    • H04B10/114—Indoor or close-range type systems
    • H04B10/1143—Bidirectional transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/27—Arrangements for networking
    • H04B10/272—Star-type networks or tree-type networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/11—Allocation or use of connection identifiers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W80/00—Wireless network protocols or protocol adaptations to wireless operation
    • H04W80/02—Data link layer protocols

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a communication method based on visible light, related devices and systems.
  • VLC Visible Light Communication
  • LED light emitting diode
  • the communication function is realized.
  • VLC technology has many advantages such as wide spectrum available, no electromagnetic interference, wide distribution of basic equipment, good human security and confidentiality. Therefore, in recent years, VLC technology has received attention from academic and industrial circles. And entered a period of rapid development.
  • a VLC network is called a Visible Light Communication Personal Area Network (VPAN), as shown in FIG. 1 is a star topology VPAN, and the VPAN is composed of a Coordinator and a multi-processor.
  • the VLC equipment consists of the coordinator, which is the main node in the VPAN (mostly by the LED lights on the top of the ceiling), responsible for the creation and management of the VPAN, and for the VLC equipment (more than the various types of consumption integrated VLC transceivers)
  • Electronic products such as smart phones, tablets, PCs, etc. serve to provide network access; VLC devices use visible light as a transmission carrier and communicate with the VPAN through a coordinator.
  • the coordinator needs to perform an active scan before creating a new VPAN and after detecting a VPAN identifier (VPAN ID) collision event.
  • the purpose of the VPAN active scanning is to receive the beacon broadcasted by the coordinator of other VPANs as much as possible to know the information of other VPANs, and of course the information includes the VPAN ID information of other VPANs.
  • the coordinator needs to choose a different VPAN for the VPAN after the active scanning ends. VPAN ID to avoid VPAN ID conflicts.
  • the coordinator successfully receives other coordination.
  • the probability of the beacon of the device is also extremely low. Therefore, the method for the coordinator to receive the beacon in the VPAN network in the prior art needs to be improved.
  • the technical problem to be solved by the embodiments of the present invention is to provide a communication method based on visible light, a related device and a system, and solve the problem of optimization of beacons.
  • an embodiment of the present invention provides a communication method based on visible light, which is applied to a visible light communication personal area network (VPAN) system.
  • the VPAN includes a coordinator and at least one visible light communication VLC device, and may include:
  • the first VLC device sends a report indication message to the coordinator, where the report indication message includes the VPAN ID information detected by the first VLC device, and the coordinator receives the report indication message sent by the first VLC device;
  • the device selects a new VPAN ID according to the VPAN ID information, and then the VPAN ID information that the coordinator in the VPAN may not directly obtain from other coordinators is transferred and forwarded through the VLC device in the VPAN, and the VLC device and other
  • the positional relationship between the coordinators determines that it is easier to obtain the VPAN ID information of the VPAN of the other coordinator, so that the VPAN ID conflict may not be effectively decomposed, and the operational efficiency of the VPAN system is improved, and the beacon is solved. Optimization problem.
  • the specific implementation manner of the coordinator selecting a new VPAN ID according to the VPAN ID information is: the coordinator selects a VPAN different from the VPAN ID included in the VPAN ID information. ID.
  • the coordinator selects an ID different from the VPAN ID included in the VPAN ID information as the new VPAN ID to avoid collision again.
  • the coordinator after the coordinator selects a new VPAN ID according to the VPAN ID information, the coordinator generates a coordinator realignment message. And transmitting a coordinator realignment message to at least one VLC device in the VPAN, the coordinator realignment message includes a new VPAN ID and an effective time; at least one VLC device in the VPAN receives the coordinator realignment message; at the effective time, the coordinator And at least A VLC device uses the new VPAN ID.
  • the coordinator selects a new VPAN ID
  • generates a related message to notify the VLC device in the VPAN that the VPAN of the coordinator has replaced the new VPAN ID, so that the VLC device in the VPAN starts to use the new one.
  • VPAN ID the coordinator selects a new VPAN ID
  • the first VLC device After the coordinator sends the report indication message, the first VLC device detects the VPAN ID conflict, and the first VLC device detects the neighbor VPAN information in the first preset time period to generate a report indication message, where the neighbor VPAN information is included.
  • the VPAN ID information is also used to report the VPAN ID conflict to the coordinator. That is, in the method, the VPAN ID conflict is discovered and reported by the first VLC device, and the reported indication message includes the neighbor VPAN information detected in a certain period of time, so that more neighbor VPAN ID information can be detected. , reducing the possibility of subsequent VPAN ID conflicts.
  • the first VLC device After the coordinator sends the report indication message, the first VLC device detects that the VPAN has a VPAN ID conflict, and generates a report indication message, and the report indication message is further used to report the VPAN ID conflict to the coordinator. That is, in the method, the VPAN ID is discovered and reported by the first VLC device, and is reported immediately after the conflict is found.
  • the VPAN ID information included in the reported indication message may be that the first VLC device finds the VPAN ID conflict.
  • the VLC device can improve the efficiency of reporting conflicts and reporting VPAN ID information after the conflict is discovered.
  • the first VLC device After the coordinator sends the report indication message, the second VLC device sends a VPAN ID conflict indication message to the coordinator after detecting that the VPAN has a VPAN ID conflict, and the VPAN ID conflict indication message is used to report the VPAN ID conflict to the coordinator; a VPAN ID conflict indication message sent by the second VLC device; the coordinator sends a report request message to the first VLC device, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, where the neighbor VPAN information includes the VPAN ID.
  • the first VLC device receives the report request message sent by the coordinator;
  • the VLC device generates a report indication message according to the detected neighbor VPAN information, and the neighbor VPAN information carries the VPAN ID information.
  • the diversity of the embodiment of the present invention is increased because the conflict is reported by the second VLC device other than the first VLC device, and the VPAN ID information is manually designated by the coordinator after the collision is learned by the coordinator. And flexibility, and the coordinator can actively select the relevant VLC device to report the VPAN ID information according to its own calculation or prediction, and obtain the VPAN ID information more specifically.
  • the method further includes: the VPAN The at least one VLC device and the coordinator maintain respective local neighbor VPAN information, and the at least one VLC device periodically or conditionally triggers reporting local neighbor VPAN information to the coordinator, the neighbor VPAN information includes VPAN ID information; and the coordinator receives the report The local neighbor VPAN information is maintained by the coordinator according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator; the coordinator selects a new VPAN ID according to the VPAN ID information, including: the coordinator according to the report The VPAN ID information in the indication message updates the global neighbor VPAN information, and according to the updated global neighbor VPAN letter Select the new VPAN ID.
  • the process of detecting and maintaining the VPAN ID information by the VLC device and the coordinator itself is added, so that the coordinator can grasp the global neighbor VPAN information in real time, so that when the VPAN ID conflict occurs, the VPAN ID conflict can be quickly obtained.
  • the comprehensive neighbor VPAN information facilitates the selection of a new VPAN ID that best avoids recurrence of conflicts, improving the operational efficiency of the VPAN system.
  • the embodiment of the present invention provides a visible light-based communication method, which is applied to a visible light communication personal area network (VPAN) system.
  • the VPAN includes a coordinator and at least one visible light communication VLC device, and may include:
  • the first VLC device sends a report indication message to the coordinator, where the report indication message includes the VPAN ID information detected by the first VLC device.
  • the first VLC device sends the coordinator Before sending the report indication message, the first VLC device detects the VPAN ID conflict in the VPAN, and the first VLC device detects the neighbor VPAN information in the first preset time period to generate a report indication message, and the neighbor VPAN information carries the VPAN.
  • the ID information, the report indication message is also used to report the VPAN ID conflict to the coordinator.
  • the method before the first VLC device sends the report indication message to the coordinator, the method includes: after the first VLC device detects that the VPAN has a VPAN ID conflict, generating a report indication message, reporting the indication The message is also used to report a VPAN ID conflict to the coordinator.
  • the method before the first VLC device sends the reporting indication message to the coordinator, the method includes: the first VLC device receives a report request message sent by the coordinator, and the report request message is used to request the VLC.
  • the device sends the detected neighbor VPAN information to the coordinator.
  • the neighbor VPAN information includes the VPAN ID information
  • the report request message is a message sent by the coordinator to the first VLC device after receiving the VPAN ID conflict indication message, and the VPAN ID conflict indication.
  • the message is sent by the second VLC device to the coordinator after the VPAN ID conflict occurs.
  • the first VLC device generates a report indication message according to the detected neighbor VPAN information, and the neighbor VPAN information carries the VPAN ID information.
  • the VPAN ID information is used by the coordinator to update the global neighbor VPAN information according to the VPAN ID information, and select a new VPAN ID according to the updated global neighbor VPAN information; wherein, the global neighbor The VPAN information is the neighbor VPAN information maintained by the coordinator according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator; the reported local neighbor VPAN information is maintained and cycled by at least one VLC device in the VPAN.
  • the neighboring VPAN information reported to the coordinator, the local neighbor VPAN information maintained by the coordinator is the neighbor VPAN information maintained by the coordinator, and the neighbor VPAN information includes the VPAN ID information.
  • the embodiment of the present invention provides a visible light-based communication method, which is applied to a visible light communication personal area network (VPAN) system.
  • the VPAN includes a coordinator and at least one visible light communication VLC device, and may include:
  • the coordinator receives the report indication message sent by the first VLC device, the report indication message includes the VPAN ID information detected by the first VLC device, and the coordinator selects a new VPAN ID according to the VPAN ID information.
  • the coordinator selects a new VPAN ID according to the VPAN ID information, including: the coordinator selects a VPAN ID that is different from the VPAN ID included in the VPAN ID information.
  • the coordinator selects a new VPAN ID according to the VPAN ID information
  • the coordinator generates a coordinator realignment message.
  • transmitting a coordinator realignment message to at least one VLC device in the VPAN the coordinator realignment message includes a new VPAN ID and an effective time; at the effective time, the coordinator and the at least one VLC device use the new VPAN ID.
  • the reporting indication message is After detecting the VPAN ID conflict of the VPAN, the VLC device detects the neighbor VPAN information in the first preset time period.
  • the neighbor VPAN information carries the VPAN ID information, and the report indication message is also used to report to the coordinator. VPAN ID conflict.
  • the reporting indication message is After the VLC device detects that the VPAN has a VPAN ID conflict, the generated message is also used to report the VPAN ID conflict to the coordinator.
  • the coordinator receives the first Before the reporting indication message sent by the VLC device, the coordinator receives the VPAN ID conflict indication message sent by the second VLC device, where the VPAN ID conflict indication message is used to report the VPAN ID conflict to the coordinator; the coordinator sends the report to the first VLC device.
  • the request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, and the neighbor VPAN information includes the VPAN ID information.
  • the method further includes: The coordinator maintains the local neighbor VPAN information; the coordinator receives the reported local neighbor VPAN information, and the reported local neighbor VPAN information is a neighbor VPAN that is reported to the coordinator and is periodically or conditionally triggered by the at least one VLC device in the VPAN.
  • the information, the neighbor VPAN information includes the VPAN ID information, and the coordinator maintains the global neighbor VPAN information according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator; the coordinator selects a new VPAN ID according to the VPAN ID information, including: The coordinator updates the global neighbor VPAN information according to the VPAN ID information in the reporting indication message, and selects a new VPAN ID according to the updated global neighbor VPAN information.
  • the embodiment of the present invention provides a visible light-based communication method, which is applied to a visible light communication personal area network (VPAN) system.
  • the VPAN includes a coordinator and at least one visible light communication VLC device, and may include:
  • the first coordinator sends a scan request message to the first device by using the backhaul Backhaul link, where the first device includes a second coordinator and/or a central controller, and the first device and the first coordinator are connected through the Backhaul link, and the scan is performed.
  • the request message is used to request VPAN ID information from the first device; the first coordinator receives the scan confirmation message sent by the first device, and selects a VPAN ID according to the VPAN ID information, where the scan confirmation message is received by the first device After the scan request message is sent to the first coordinator, the scan confirmation message carries the VPAN ID information maintained by the first device.
  • the first device includes a second coordinator; the VPAN ID information maintained by the first device includes VPAN ID information of the VPAN where the second coordinator is located.
  • the first device includes a central controller; the VPAN ID information maintained by the first device includes The VPAN ID information of the VPAN where the controller connected to the Backhaul link is located.
  • the first device includes the following steps: the first coordinator reports the VPAN ID information of the VPAN where the first coordinator is located to the central controller periodically or conditionally triggered by the Backhaul link.
  • the first coordinator before the first coordinator sends the scan request message to the first device by using the backhaul Backhaul link, the first coordinator receives the VPAN ID conflict indication message sent by the second device, and the VPAN ID conflicts.
  • the indication message is used to report a VPAN ID conflict to the first coordinator.
  • the method includes: the first coordinator generates coordination Realigning the message and transmitting the coordinator realignment message to at least one VLC device in the VPAN, the coordinator realignment message including the selected VPAN ID and an effective time; at the effective time, the The coordinator and the at least one VLC device use the selected VPAN ID.
  • the first coordinator sends a scan request message to the first device by using the backhaul Backhaul link, including: the first coordinator sends a scan request to the first device by using the backhaul Backhaul link before creating the VPAN. Message.
  • the method includes: the first coordinator broadcast message The beacon includes the selected VPAN ID.
  • the first coordinator selects a VPAN ID according to the VPAN ID information, including: the first coordinator selects one and the VPAN The VPAN IDs included in the ID information are not the same VPAN ID.
  • the Backhaul link includes a wired link or a wireless link, where the cable The link includes a power line communication PLC link or an Ethernet Ethernet link or a fiber link, and the wireless link includes a Wi-Fi link or a cellular link or a WiMax link or a Bluetooth link or a ZigBee link.
  • a fifth aspect of an embodiment of the present invention provides a VLC device, comprising a module for performing the method of the second aspect.
  • a sixth aspect of the embodiments of the present invention provides a network access device, including a module for performing the method in the third aspect.
  • a seventh aspect of the embodiments of the present invention provides a network access device, including a module for performing the method in the fourth aspect.
  • An eighth aspect of the embodiments of the present invention provides a device, where the device includes a processor, and the processor is configured to support the device to perform a corresponding function in a visible light-based communication method provided by the second aspect.
  • the device can also include a memory for coupling with the processor that holds the program instructions and data necessary for the device.
  • the device can also include a communication interface for the device to communicate with other devices or communication networks.
  • a ninth aspect of the embodiments of the present invention provides a device, where the device includes a processor, and the processor is configured to support the device to perform a corresponding function in a visible light-based communication method provided by the third aspect.
  • the device can also include a memory for coupling with the processor that holds the program instructions and data necessary for the device.
  • the device can also include a communication interface for the device to communicate with other devices or communication networks.
  • a tenth aspect of the embodiments of the present invention provides a device, where the device includes a processor, and the processor is configured to support the device to perform a corresponding function in a visible light-based communication method provided by the fourth aspect.
  • the device can also include a memory for coupling with the processor that holds the program instructions and data necessary for the device.
  • the device may also include a communication interface for the device to communicate with other devices or Letter network communication.
  • An eleventh aspect of the present invention provides a computer storage medium for storing computer software instructions for use in the apparatus provided in the above eighth aspect, comprising a program designed to perform the above aspects.
  • a twelfth aspect of the embodiments of the present invention provides a computer storage medium for storing computer software instructions for use in the apparatus provided in the above ninth aspect, comprising a program designed to perform the above aspects.
  • a thirteenth aspect of the present invention provides a computer storage medium for storing computer software instructions for use in the apparatus provided in the above tenth aspect, comprising a program designed to perform the above aspects.
  • a fourteenth aspect of the embodiments of the present invention provides a communication system, including the first VLC provided by the fifth aspect and/or the coordinator provided by the sixth aspect.
  • a VLC device in a case where a VPAN VPANID conflict occurs, a plurality of VLC devices in the VPAN system a VLC device sends a report indication message to the coordinator, where the report indication message includes the VPAN ID information detected by the first VLC device; the coordinator receives the report indication message sent by the first VLC device, and sends the report according to the first VLC device.
  • the VPAN ID information included in the indication message selects a new VPAN ID.
  • the embodiment of the present invention passes the VPAN ID information that the coordinator in the VPAN may not directly obtain from other coordinators to receive and forward through the VLC device in the VPAN, because The positional relationship between the VLC device and other coordinators determines that it is easier to obtain the VPAN ID information of the VPAN of the other coordinator, thereby solving the problem that the VPAN ID conflict may not be effectively decomposed, and improving the operating efficiency of the VPAN system.
  • FIG. 1 is a schematic diagram of a VPAN structure of a star topology
  • FIG. 2 is a structural diagram of a VPAN system according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart diagram of a communication method based on visible light according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart diagram of an embodiment of a visible light-based communication method according to an embodiment of the present disclosure
  • FIG. 5 is a schematic flowchart diagram of another embodiment of a visible light-based communication method according to an embodiment of the present disclosure
  • FIG. 6 is a schematic flowchart diagram of another visible light-based communication method according to an embodiment of the present invention.
  • FIG. 7 is a layout diagram of a distributed LED lamp according to an embodiment of the present invention.
  • FIG. 8 is a schematic flowchart diagram of another embodiment of a visible light-based communication method according to an embodiment of the present disclosure.
  • FIG. 9 is a layout diagram of a centralized LED lamp according to an embodiment of the present invention.
  • FIG. 10 is a schematic flowchart diagram of another embodiment of a visible light-based communication method according to an embodiment of the present disclosure.
  • FIG. 11 is a schematic structural diagram of a first VLC device according to an embodiment of the present disclosure.
  • FIG. 12 is a schematic structural diagram of a coordinator according to an embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a communication system according to an embodiment of the present invention.
  • FIG. 14 is a schematic structural diagram of a first coordinator according to an embodiment of the present invention.
  • FIG. 15 is a schematic structural diagram of an apparatus according to an embodiment of the present invention.
  • references to "an embodiment” herein mean that a particular feature, structure, or characteristic described in connection with the embodiments can be included in at least one embodiment of the invention.
  • the appearances of the phrases in various places in the specification are not necessarily referring to the same embodiments, and are not exclusive or alternative embodiments that are mutually exclusive. Those skilled in the art will understand and implicitly understand that the embodiments described herein can be combined with other embodiments.
  • the first VLC device and the second VLC device are devices that can perform visible light communication, for example, may be a terminal, also called a User Equipment (UE), which is a voice and/or data provided to the user.
  • UE User Equipment
  • Connectivity devices such as smartphones, tablets, media players, smart TVs, smart bracelets, smart wearable devices, MP3 players with visible light communication capabilities (Moving Picture Experts Group Audio Layer III) Audio level 3), MP4 (Moving Picture Experts Group Audio Layer IV), communication devices such as Personal Digital Assistant (PDA) laptop portable computers and desktop computers.
  • PDA Personal Digital Assistant
  • the coordinator is the master node of the visible light communication personal area network VPAN, providing network access for the terminals in the VPAN, and managing and maintaining the operation of the VPAN;
  • the general coordinator is a light emitting diode (LED) located on the top of the ceiling.
  • the light comes in; it can also be a Radio Access Network (RAN) device with visible light communication function on the access network side of the cellular network.
  • RAN device is a kind of terminal that connects the terminal to the wireless network.
  • the device is a global control node connected to the coordinator of each VPAN through a wired or wireless connection link, and is responsible for unified coordination and management of the operation of each VPAN.
  • the MAC layer is the MAC layer of the VLC, including the data plane and
  • the data plane of the MAC layer is responsible for performing MAC frame framing of the service data submitted by the upper layer and de-framing the MAC frame submitted by the physical layer
  • the management layer of the MAC layer is responsible for generating various MAC layer messages and identifying the MAC layer. The received message performs the corresponding processing action according to the content of the MAC layer message.
  • the MLME is the management plane of the MAC layer, and the management plane is responsible for generating various MAC layer messages, and identifying messages received by the MAC layer and performing corresponding operations according to the MAC layer message content. Process actions.
  • the neighboring upper layer of the MAC layer is a protocol layer adjacent to the MAC layer above the MAC layer, and the neighboring high layer may be an abstraction layer in the IEEE 1905.1 standard, or may be an IP layer or other protocol layer, which is not limited by the present invention. . Adjacent layers of the MAC layer and the MAC layer can interact through primitives.
  • Primitive refers to a set of parameters exchanged when two adjacent layers in the protocol stack interact.
  • the parameter set is the necessary information provided by the interacting party to the other party.
  • each primitive also strictly defines the conditions it generates, the purpose of the interaction of the primitives, and the processing actions after the other party receives the primitives.
  • a complete service primitive consists of a name, a type, and a parameter. But in addition to this, the primitive also needs to specify the timing of its creation, the purpose of the primitive, and the action after receiving the primitive.
  • Multiple means two or more. "and/or”, describing the association relationship of the associated objects, indicating that there may be three relationships, for example, A and/or B, which may indicate that there are three cases where A exists separately, A and B exist at the same time, and B exists separately.
  • the character "/" generally indicates that the contextual object is an "or" relationship.
  • the VPAN system includes multiple VPANs (only VPAN1 and VPAN2 are taken as an example in FIG. 2), and both VPAN1 and VPAN2 in the figure are star topology, wherein both VPAN1 and VPAN2 include a coordinator. (such as LEDs on top of ceilings) and at least one VLC device (such as a smartphone, tablet, PC with integrated VLC transceiver), the coordinator is the master node in the VPAN, providing network access for VLC devices.
  • a coordinator such as LEDs on top of ceilings
  • VLC device such as a smartphone, tablet, PC with integrated VLC transceiver
  • the coordinator 1 in VPAN1 and the coordinator 2 in VPAN2 periodically broadcast and transmit beacons (the beacon carries some important information required for VPAN operation, such as VPAN ID, coordinator short address, resource scheduling information, etc.)
  • the beacon carries some important information required for VPAN operation, such as VPAN ID, coordinator short address, resource scheduling information, etc.
  • the device in the middle provides the information needed to run the VPAN.
  • the devices in the VPAN are synchronized with the coordinator by receiving beacons and accessing the VPAN based on the information provided in the beacon and operating correctly in the VPAN.
  • each VPAN has a VPAN ID that identifies the VPAN
  • the coordinator needs to determine the VPAN ID of the VPAN to be created when creating the VPAN. How the coordinator determines that the VPAN ID is not specified in the general standard, but the VPAN ID selected by the coordinator should be avoided as much as the VPAN ID selected by other VPANs. If two different VPANs select the same VPAN ID, the VPAN IDs of the two VPANs are considered to be in conflict, and the VPAN ID conflict resolution is required.
  • the coordinator and the device can determine whether the VPAN ID of the VPAN and the VPAN ID of the neighbor VPAN have occurred as long as the coordinator and the device can detect the beacon sent by the coordinator of another VPAN. conflict.
  • the coordinator in the VPAN itself detects the beacon of the coordinator of the other VPAN and finds that the VPAN ID of the VPAN is the same as the VPAN ID of the other VPAN, the coordinator itself detects the VPAN ID collision event; if it is in the VPAN
  • the device detects the beacon of the coordinator of the other VPAN, and finds that the VPAN ID of the VPAN is the same as the VPAN ID of the other VPAN, and the device detects that the VPAN ID conflicts. In this case, the device needs to send the VPAN ID conflict indication message to the coordinator.
  • the VPAN ID conflicts so the final coordinator can still detect the VPAN ID conflict by reporting the device.
  • the coordinator needs to select a new VPAN ID for the VPAN as soon as possible.
  • the coordinator performs resource scheduling and management on the VPAN by using a superframe as a time period, and the coordinator broadcasts the beacon at least once in each superframe.
  • the coordinator needs to perform an active scan before selecting a VPAN ID collision event and after selecting a VPAN ID conflict event, and select a suitable VPAN for the VPAN according to the scan result. ID. If the beacon cannot be received correctly and reliably, the coordinator cannot effectively know the VPAN ID selected by other VPANs. Therefore, the coordinator cannot select a reasonable VPAN ID for the VPAN during the VPAN creation process and the VPAN ID conflict resolution process, and coordination may occur.
  • the active scanning process of the coordinator is as follows: the neighboring high-level device sends a request scanning primitive (MLME-SCAN.request) to the MLME of the device, and requires the MLME to perform an active scanning process. This primitive is specified The duration of the active scan is required. After receiving the primitive, the MLME of the device generates a beacon request message and broadcasts it. The device receives beacons broadcast by other coordinators during the duration of the active scan.
  • MLME-SCAN.request request scanning primitive
  • This primitive is specified
  • the duration of the active scan is required.
  • the MLME of the device After receiving the primitive, the MLME of the device generates a beacon request message and broadcasts it. The device receives beacons broadcast by other coordinators during the duration of the active scan.
  • the MLME of the device sends a scan confirmation primitive (MLME-SCAN.confirm) to its neighboring high layer, and reports the information of all the VPANs detected by the neighboring high layer on the primitive.
  • the system to which the embodiment of the present invention is applied includes, but is not limited to, the above-mentioned visible light communication personal area network VPAN system, and can also be applied to Wi-Fi, Zigbee, IR, which integrates the visible light communication personal area network VPAN system.
  • a heterogeneous converged network system such as Bluetooth, LTE, GSM, etc., as long as the system capable of applying the visible light-based communication method of the present invention is within the scope of protection and coverage of the present invention.
  • FIG. 3 is a schematic flowchart diagram of a visible light-based communication method according to an embodiment of the present invention, which can be applied to the VPAN system described in FIG. 2, and the first VLC device in the VPAN, which will be described below with reference to FIG.
  • the interactive side of the coordinator is described, wherein some of the actions also involve the second VLC device as well as other VLC devices.
  • the first VLC device, the second VLC device, the coordinator, and other related VLC devices are all devices deployed in the same VPAN.
  • the method may include the following steps S301-S303.
  • Step S301 In the case that a VPAN ID conflict occurs in the VPAN, the first VLC device sends a report indication message to the coordinator, where the report indication message includes the VPAN ID information detected by the first VLC device.
  • Step S302 The coordinator receives the report indication message sent by the first VLC device.
  • Step S303 The coordinator selects a new VPAN ID according to the VPAN ID information.
  • the coordinator selects a VPAN ID that is different from the VPAN ID included in the VPAN ID information to avoid collision (not repeated) with the VPAN ID that can be learned as much as possible, thereby avoiding subsequent collisions that may occur. Further, the coordinator generates a coordinator realignment message and sends the coordinator realignment message to at least one VLC device (which may be one, multiple, or all) in the VPAN, wherein the coordinator realignment message includes the above a new VPAN ID and an effective time; the at least one VLC device in the VPAN receives the coordinator realignment message. When the effective time comes, the coordinator and the VLC device that knows the new VPAN ID start to use the new VPAN ID, and thus the VPAN ID conflict of the above VPAN is reasonably solved.
  • detecting that the VPAN conflict occurs in the VPAN may include two situations: one is that the VLC device in the VPAN discovers that the VPAN ID conflicts and reports to the coordinator; the other is that the coordinator scans the discovered oneself.
  • VPAN ID conflicts which can include the following implementations:
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the first VLC device After the first VLC device sends a report indication message to the coordinator, the first VLC device detects the VPAN ID conflict, and the first VLC device detects the neighbor VPAN information in a preset time period to generate a report indication message, where the neighbor The VPAN information is included in the VPAN information, and the report indication message is also used to report the VPAN ID conflict to the coordinator. That is, in the method, the VPAN ID conflict is detected and reported by the first VLC device, and the reported indication message includes the neighbor VPAN information detected within the preset time period, so that more neighbor VPAN IDs can be detected. Information, reducing the likelihood of subsequent VPAN ID collisions.
  • the neighbor VPAN in each embodiment of the present invention refers to a VPAN other than the VPAN that the related VLC device or the coordinator can detect.
  • the neighbor VPAN information in each embodiment of the present invention includes, but is not limited to, a VPAN ID of a neighbor VPAN, a coordinator address (short address or MAC address) of a neighbor VPAN, and the like.
  • the method for detecting the neighbor VPAN information by the VLC device may be detected by an active scanning process, or may be detected by a passive scanning process, or may be other detection processes than active scanning and passive scanning, and the present invention is not limited thereto. .
  • the process of the passive scanning process is as follows: the neighboring high-level device sends a request scanning primitive (MLME-SCAN.request) to the MLME of the device, and requires the MLME to perform a passive scanning process.
  • This primitive specifies the duration of time required for passive scanning.
  • the MLME of the device receives beacons broadcast by other coordinators during the duration of the passive scan.
  • the MLME of the device sends a scan confirmation primitive (MLME-SCAN.confirm) to its neighboring high layer, and reports the information of all the VPANs detected by the neighboring high layer on the primitive. This includes the VPAN ID information of the VPAN.
  • the method of the detection method other than the active scanning and the passive scanning means that the device detects the neighbor VPAN information by detecting and receiving a MAC frame other than the beacon in the neighbor VPAN, and the beacon frame is excluded.
  • the MAC frames other than the command include a command frame, a data frame, a control frame, an acknowledgement frame, and the like. Since the frame header of the MAC frame other than the beacon generally carries the VPAN ID information of the VPAN where the VLC device that generates the MAC frame is located, detecting the MAC frame of the neighbor VPAN other than the beacon can also detect the neighbor VPAN. VPAN ID.
  • the other method of detecting other than active scanning and passive scanning means that the device detects both the beacon frame of the neighbor VPAN and the other MAC frames of the neighbor VPAN except the beacon frame.
  • the detection methods other than the active scanning and the passive scanning may be set by the coordinator or the device for only a period of time, or may be performed during the VPAN operation.
  • FIG. 4 the flowchart of the specific execution process of the embodiment of the present invention is as shown in FIG. 4, and may be as follows:
  • the first VLC device After the first VLC device detects the VPAN ID collision event (ie, the first VLC device receives the beacon with the same VPAN ID as the VPAN ID of the VPAN but the coordinator address is different from the address of the VPAN coordinator, It is considered that the VPAN ID conflict event currently occurs, and the neighbor VPAN information is detected within a preset time (for example, the preset time is the length of m super frames).
  • the preset time is the length of m super frames.
  • the report message is sent to the coordinator, where the message carries the neighbor VPAN information detected by the device in the preset time period.
  • the MLME of the coordinator After receiving the VPAN ID conflict notification message of the first VLC device, the MLME of the coordinator sends an MLME-LOSS-SYNC.indication primitive to its neighboring higher layer, and the primitive also carries the coordinator from the first Neighbor VPAN information received by the VLC device.
  • the coordinator MLME after receiving the VPAN ID conflict notification message of the first VLC device, the coordinator MLME first sends an ACK frame to the first VLC device, and then sends the MLME-LOSS-SYNC.indication primitive to its neighboring upper layer.
  • the neighboring upper layer of the coordinator selects a new VPAN ID for the VPAN according to the neighbor VPAN information reported by the MLME in the MLME-LOSS-SYNC.indication primitive.
  • the neighboring upper layer selects a new VPAN ID for the VPAN by selecting a VPAN ID that is different from the VPAN ID of any one of the reported neighbor VPAN information.
  • the coordinator has completed the task of selecting a new VPAN ID for the VPAN.
  • the neighboring high-level generates a MLME-START.request primitive, and carries the selected new VPAN ID in the primitive.
  • the coordinator's MLME generates the primitive and generates a coordinator re-alignment message after the primitive is received. Indicates the new VPAN ID and the effective time.
  • the device in the VPAN After the device in the VPAN receives the coordinator realignment message, its MLME sends MLME-SYNC-LOSS.indication to the neighboring higher layer, which indicates the new VPAN ID received. After the neighboring high-level receives the primitive, the MLME ID is updated by the MLME-SET.request primitive. When the effective time comes, the devices in the coordinator and VPAN start using the new VPAN ID. At this point, the detection reporting and decomposition process of the VPAN ID conflict is completed.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the first VLC device After the first VLC device sends the report indication message to the coordinator, the first VLC device generates the VPAN ID conflict after the VPAN conflicts, and the report indication message is further used to report the VPAN ID conflict to the coordinator.
  • the difference between the embodiment and the first embodiment is that after the first VLC device detects the conflict, the neighboring VPAN information is not required to be detected in the preset time, and the report indication message may be generated immediately, where the report indication message may be according to the When a VLC device finds that the VPAN ID conflicts, the received VPAN ID information is generated, or may be generated according to historical VPAN ID information that the first VLC device has detected and maintained.
  • the VPAN ID conflict is detected and reported by the first VLC device, and is immediately reported after the conflict is found, and the VPAN ID information included in the report indication message may be currently detected by the first VLC device.
  • the VPAN ID information of the VPAN ID and the VPAN ID are reported after the VLC device finds the conflict.
  • the report indication message itself can have the function of indicating that the VPAN has a VPAN ID conflict, that is, the report indicating that the message can be collated by carrying relevant feature information or not carrying any relevant feature information. More specific implementation details may correspond to the specific processes (1)-(6) in the first embodiment.
  • Embodiment 3 is a diagrammatic representation of Embodiment 3
  • the second VLC device After the first VLC device sends a report indication message to the coordinator, the second VLC device sends a VPAN ID conflict indication message to the coordinator after detecting that the VPAN has a VPAN ID conflict, and the VPAN ID conflict indication message is used to report the VPAN ID conflict to the coordinator.
  • the coordinator receives the VPAN ID conflict indication message sent by the second VLC device; the coordinator sends a report request message to the first VLC device, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, the neighbor The VPAN information includes the VPAN ID information.
  • the first VLC device receives the report request message sent by the coordinator.
  • the first VLC device generates a report indication message according to the detected neighbor VPAN information, and the neighbor VPAN information carries the VPAN ID information.
  • the neighbor VPAN information detected by the first VLC device in the embodiments of the present invention may include the neighbor VPAN information that is detected when the first VLC device detects the conflict, and may also include that the first VLC device has previously Detecting the neighbor VPAN information of the maintenance may also include the VPAN ID information obtained by the first VLC device after detecting the VPAN ID conflict, and the VPAN ID information obtained by the first VLC device according to the present invention.
  • the report indication information generated by the VPAN information is not specifically limited.
  • the process of detecting the neighbor VPAN information by the first VLC device has been described in the foregoing Embodiment 1, and details are not described herein again.
  • the difference between the third embodiment and the second embodiment is that the VPAN ID conflict event is reported by the first VLC device to the coordinator after the first VLC device detects the VPAN ID conflict.
  • the second VLC device reports to the coordinator immediately after detecting the VPAN ID conflict, and the coordinator knows the first VLC device in the VPAN (the first VLC device may include the second VLC device). The detection of VPAN information of other VPANs is performed.
  • FIG. 5 the flowchart of the specific execution process of the embodiment of the present invention is as shown in FIG. 5, and may be as follows:
  • the second VLC device After the second VLC device detects the VPAN ID collision event (ie, the second VLC device receives the beacon with the same VPAN ID as the VPAN ID of the VPAN but the coordinator address is different from the address of the VPAN coordinator, It is considered that a VPAN ID collision event is currently occurring, and a VPAN ID conflict indication message is sent to the coordinator.
  • the VPAN ID collision event ie, the second VLC device receives the beacon with the same VPAN ID as the VPAN ID of the VPAN but the coordinator address is different from the address of the VPAN coordinator.
  • the MLME of the coordinator After receiving the VPAN ID conflict indication message, the MLME of the coordinator sends an MLME-LOSS-SYNC.indication primitive to its neighboring higher layer.
  • the MLME of the coordinator after receiving the VPAN ID conflict indication message of the second VLC device, the MLME of the coordinator first sends an ACK frame to the second VLC device, and then sends the MLME-LOSS-SYNC.indication primitive to its neighboring upper layer.
  • the neighboring high-level coordinator After receiving the MLME-LOSS-SYNC.indication primitive, the neighboring high-level coordinator knows that the VPAN ID conflict event has occurred, so the neighboring high-level coordinator generates a report request. Language and sent to the coordinator's MLME.
  • the reporting request primitive carries the device address information and/or the detection type information that needs to perform the detection, where the device address information that needs to be detected is used to indicate which devices need to perform detection of the neighbor VPAN information, and the detection type information is used.
  • the pointing device should perform active or passive scanning, or other detection methods other than active scanning and passive scanning. The above three detection methods are all described in the first embodiment, and are not described herein again.
  • the MLME of the coordinator After receiving the report request primitive, the MLME of the coordinator generates a report request message and sends it to the first VLC device.
  • the first VLC device may be all devices in the VPAN, or may be selected by the coordinator, some of the devices in the VPAN. It can be understood that the first VLC device may include the second VLC device or may not include the second VLC device, as shown in FIG. 5, and the case where the second VLC device is included is shown in FIG. 5. If there are multiple first VLC devices, the coordinator may choose to send the report request message to the first VLC device to any of the first VLC device broadcast, multicast, and unicast transmission modes.
  • the report request message further carries the detection type information, that is, the coordinator indicates, in the report request message, what kind of detection the first VLC device should perform to detect the neighbor VPAN information.
  • the first VLC device After receiving the report request message, the first VLC device starts to perform detection of the neighbor VPAN information;
  • the first VLC device performs the detection according to the requirement in the message.
  • the MLME of the first VLC device after receiving the report request message of the coordinator, the MLME of the first VLC device first sends an out-of-synchronization indication primitive to its neighboring upper layer, and then performs a detection process.
  • the first VLC device After the first VLC device performs the detection as required, it returns a report indication message to the coordinator.
  • the reporting indication message carries at least the VPAN ID information of the neighbor VPAN detected by the first VLC device.
  • steps (5) and (6) are that after the first VLC device receives the report request message sent by the coordinator, the VPAN ID information is detected, and the detection result is reported to the coordinator;
  • the first VLC device may also feed back the local VPAN ID information that has been detected or maintained before receiving the report request message, and therefore, steps (5) and (6) may be performed by the Alternatives are not described here.
  • the MLME of the coordinator After receiving the report indication message of the first VLC device, the MLME of the coordinator generates a report confirmation primitive sent to the neighboring upper layer of the coordinator.
  • the MLME of the coordinator may send a report confirmation primitive to the neighboring upper layer after receiving a report indication message, where the primitive only includes the device that sends the report indication message.
  • VPAN ID information the MLME of the coordinator sends the report confirmation primitive to the neighboring upper layer only after receiving the report indication message of all the first VLC devices, and the primitive includes all the neighbors detected by the first VLC device.
  • VPAN ID information of VPAN the VPAN ID information of VPAN.
  • the coordinator if the coordinator fails to receive the reporting indication message of all the first VLC devices within the specified time, the coordinator considers that the reporting indication message is not sent (may also be that the first VLC device sends the reporting indication message, but the coordinator does not The first VLC device fails to receive the detection, because the coordinator cannot distinguish between the two cases, the coordinator considers that the first VLC device does not report the indication message.
  • the MLME of the coordinator is in the reporting indication primitive. The device information that failed to be detected is also reported to the neighboring high-level.
  • the neighboring upper layer of the coordinator selects a new VPAN ID for the VPAN.
  • the neighboring upper layer selects a new VPAN ID for the VPAN by selecting a VPAN ID that is different from the VPAN ID of any one of the reported neighbor VPAN information.
  • the coordinator has completed the task of selecting a new VPAN ID for the VPAN.
  • a neighboring upper level generates a MLME-START.request primitive and carries the selected new VPAN ID in this primitive.
  • the coordinator's MLME generates and sends a coordinator realignment message after receiving the primitive, indicating the new VPAN ID and the effective time in the message.
  • the coordinator when the coordinator does not find any beacons after the active scanning according to the prior art (or even if some beacons are found), the coordinator still has reason to suspect that some coordinator beacons do not have themselves. Received by this scanning process, so the coordinator will notify the VLC device to search again according to the method described in Embodiment 3, or go through the Backhaul link which will be described later. Search again.
  • Embodiment 4 is a diagrammatic representation of Embodiment 4:
  • the at least one VLC device and the coordinator of the VPAN maintain respective local neighbor VPAN information, and the at least one VLC device periodically or conditionally triggers reporting local neighbor VPAN information to the coordinator, where the neighbor VPAN information includes VPAN ID information;
  • the coordinator receives the reported local neighbor VPAN information; the coordinator maintains the global neighbor VPAN information according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by itself.
  • one or more of the VPANs, or even all of the VLC devices, including the coordinator itself, can maintain their respective local neighbor information, which is the beacon of the VLC device and the coordinator by receiving the neighbor VPAN or
  • the neighbor VPAN information is detected by other MAC frames, and the local neighbor VPAN information is separately stored and maintained by the device and the coordinator that perform the detection.
  • the VLC device needs to be periodically (such as reporting every 2 superframes) or conditionally triggered (for example, detecting a new neighbor VPAN or consecutive multiple superframes does not detect any of the previously detected ones.
  • the VPAN reports the local neighbor VPAN information maintained by the coordinator.
  • the VLC device reports the local neighbor VPAN information by sending a report indication message to the coordinator.
  • the coordinator needs to maintain the global neighbor VPAN information.
  • the global neighbor VPAN information is maintained by combining the local neighbor VPAN information reported by the VLC device and the local neighbor VPAN information maintained by the coordinator itself. Since the local neighbor VPAN information of the VLC device and the coordinator itself is dynamic in real time, and the VLC device also reports the local neighbor VPAN information in real time, the global neighbor VPAN information maintained by the coordinator can be dynamically updated.
  • the specific implementation process of step S303 in the embodiment of the present invention is: the coordinator updates the global neighbor VPAN information according to the VPAN ID information in the reporting indication message, and selects a new VPAN ID according to the updated global neighbor VPAN information. . That is, the coordinator maintains the global neighbor VPAN information according to the local neighbor VPAN information maintained by the VLC device and the neighbor VPAN information reported by the VLC device, so that the coordinator can report the VPAN ID conflict and send the report to the first VLC device. After the message is indicated, the global neighbor VPAN information is updated according to the VPAN ID information in the report indication message, so as to reasonably select the VPAN ID that is not currently used, and avoid the VPAN ID conflict again.
  • the difference between the fourth embodiment and the first, second and third embodiments is that the coordinator is in the fourth embodiment.
  • the global neighbor VPAN information is protected. After the coordinator finds the VPAN ID conflict through the reporting by the VLC device, the coordinator can update the maintained global neighbor VPAN information according to the reporting indication message sent by the first VLC, and according to the updated global The VPAN information selects a new VPAN ID.
  • the fourth embodiment can also be implemented in combination with the first, second or third embodiment, respectively, for additional explanation about how the coordinator knows the VPAN ID conflict, under what conditions the first VLC device is directed.
  • the coordinator sends the report indication message, and the specific content and function of the report indication message, which can refer to the foregoing first, second and third embodiments, and will not be enumerated here.
  • the VLC device and the coordinator in the VPAN system both maintain the local neighbor VPAN information.
  • the VLC device and the coordinator obtain and maintain the neighbor VPAN detection information as follows:
  • Each VLC device in the VPAN (including the coordinator itself), once it detects and receives a beacon frame or other MAC frame in another VPAN, if the beacon frame or MAC frame contains a previously undetected VPAN ID message Then, the VLC device and the coordinator add a new VPAN ID record to the local neighbor VPAN information maintained by the VLC device and record the time when the VPAN ID is detected. Each record in the local neighbor VPAN information has an aging time. After a VPAN ID record is added, if the VLC device and the coordinator fail to detect the VPAN ID again within the aging time, the record will be Remove from the local neighbor VPAN information.
  • the VLC device and the coordinator need to update the detection time corresponding to the VPAN ID to the time of the detection.
  • the VLC device also needs to report its local neighbor VPAN information to the coordinator periodically or conditionally. For example, the VLC device sends a report indication message to the coordinator every 2 super frames, or the VLC device sends a report indication message to the coordinator after detecting a neighbor VPAN ID, or the VLC device deletes the record corresponding to the neighbor VPAN ID.
  • a report indication message is sent to the coordinator.
  • the VLC device needs to periodically send a report indication message to the coordinator, and also needs to send a report indication message to the coordinator when the foregoing conditions are met.
  • the neighboring VPAN information may include: a VPAN ID, a coordinator address (short address or MAC address), and the like.
  • the coordinator maintains a global neighbor VPAN information according to the local neighbor VPAN information reported by each VLC device and the local neighbor VPAN information maintained by the VLC device, and the coordinator maintains the global neighbor VPAN.
  • the coordinator summarizes the local neighbor VPAN information reported by all VLC devices and the local neighbor VPAN information maintained by itself, and maintains a global neighbor VPAN information as shown in Table 1.
  • Table 1 Each of the records and their corresponding meanings are as follows. Said.
  • a VLC device reports to the coordinator that a new neighbor VPAN is detected, or the coordinator itself newly detects a new neighbor VPAN, the coordinator adds a new VPAN descriptor and corresponding information to the table. If a new VLC device detects a neighbor VPAN in Table 1, the coordinator updates the corresponding information under the VPAN descriptor in Table 1. If the VLC device reports to the coordinator that the neighboring VPAN cannot be detected in the aging time, or the VLC device that can detect a neighbor VPAN has left the VPAN, or the coordinator is in the aging time. If the neighbor VPAN can no longer be detected, the coordinator deletes the VLC device or the coordinator's own information in the VPAN descriptor.
  • the second VLC device After the second VLC device detects the VPAN ID conflict event (ie, the second VLC setting) After receiving the beacon with the same VPAN ID and the VPAN ID of the VPAN but the coordinator address is different from the address of the VPAN coordinator, it is considered that the VPAN ID conflict event is currently occurring, and the VPAN ID conflict indication message is sent to the coordinator. .
  • the VPAN ID conflict event ie, the second VLC setting
  • the second VLC device after detecting the VPAN ID conflict event, the second VLC device first performs the detection for a period of time according to the detection method of the first embodiment, and then sends the VPAN ID conflict indication message to the coordinator after the detection.
  • the coordinator After receiving the VPAN ID conflict indication message sent by the second VLC device, the coordinator selects a new VPAN ID for the VPAN according to the global neighbor VPAN information maintained by the coordinator.
  • the coordinator first notifies the designated VLC device in the VPAN (such as the first VLC device) to perform detection for a period of time and then reports the coordinator according to the first VLC.
  • the VPAN ID information reported by the device updates the global neighbor VPAN information maintained by the coordinator, and selects a new VPAN ID for the VPAN according to the updated global neighbor VPAN information.
  • the coordinator notifies the specified VLC device in the VPAN to perform the detection and reporting of the VLC device for a period of time or immediately, and the method may be performed in the related manner in the third embodiment.
  • the coordinator when the coordinator requires the specified VLC device in the VPAN to perform the detection, there are several alternative methods for specifying the VLC device to be selected. For example, select those VLC devices that appear in the "Device Address" table in Table 1 as the designated VLC devices. Because these VLC devices can detect neighboring VPANs, these VLC devices can be detected as designated VLC devices. The probability of detecting beacons of other VPANs is greater than that of VLC devices that are not present in this category.
  • the coordinator when the coordinator does not find any beacons after the active scanning according to the prior art (or even if some beacons are found), the coordinator still has reason to suspect that some coordinator beacons do not have themselves. Received by this scanning process, the coordinator then notifies the VLC device to search again according to the method described in Embodiment 3, or searches through the Backhaul link which will be described later.
  • the above is an explanation of an embodiment performed from the first VLC device in the VPAN and the method interaction side of the coordinator. It can be understood that the present invention also protects the participation in the interaction process of the method.
  • the first VLC device and coordinator of the action Wherein, from the single side of the first VLC device, it can perform the following method flow:
  • the first VLC device generates a report indication message when the VPAN conflicts with the VPAN, where the report indication message includes the VPAN ID information detected by the first VLC device;
  • the first VLC device is configured to send a report indication message to the coordinator.
  • the first VLC device detects the neighbor VPAN information in the first preset time period, where the neighbor VPAN information carries the VPAN ID information; the first VLC device generates the The report indication message is further used to report a VPAN ID conflict to the coordinator.
  • the reporting indication message is generated, and the reporting indication message is further used to report a VPAN ID conflict to the coordinator.
  • the first VLC device receives the report request message sent by the coordinator, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, where the neighbor VPAN information includes the VPAN ID.
  • the report request message is a message sent by the coordinator to the first VLC device after receiving the VPAN ID conflict indication message, and the VPAN ID conflict indication message is detected by the second VLC device by the VPAN a message sent to the coordinator after a VPAN ID conflict occurs;
  • the first VLC device generates the report indication message according to the detected neighbor VPAN information, where the neighbor VPAN information carries VPAN ID information.
  • the VPAN ID information is used by the coordinator to update global neighbor VPAN information according to the VPAN ID information, and select a new VPAN ID according to the updated global neighbor VPAN information; wherein the global neighbor VPAN information is The neighboring VPAN information maintained by the coordinator according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator; the reported local neighbor VPAN information is maintained and cycled by at least one VLC device in the VPAN The neighboring VPAN information reported to the coordinator, the local neighbor VPAN information maintained by the coordinator is the neighbor VPAN information maintained by the coordinator, and the neighbor VPAN information includes the VPAN ID information.
  • the method flow performed by the first VLC device may be corresponding to the specific implementation manner in the foregoing method embodiments in FIG. 3 to FIG. 5 , and details are not described herein again.
  • the coordinator receives the report indication message sent by the first VLC device in the case that the VPAN conflict occurs in the VPAN, where the report indication message includes the VPAN ID information detected by the first VLC device;
  • the coordinator selects a new VPAN ID based on the VPAN ID information.
  • the coordinator selects a VPAN ID that is different from the VPAN ID included in the VPAN ID information.
  • the coordinator generates a coordinator realignment message, and sends the coordinator realignment message to at least one VLC device in the VPAN, where the coordinator realignment message includes the new VPAN ID and an effective time At the effective time, the coordinator and the at least one VLC device use the new VPAN ID.
  • the reporting indication message is a message generated by the first VLC device after detecting the VPAN ID conflict of the VPAN, and detecting the neighbor VPAN information in the first preset time period, where the neighbor VPAN information is generated.
  • the VPAN ID information is carried in the VPAN ID, and the report indication message is further used to report a VPAN ID conflict to the coordinator.
  • the reporting indication message is a message generated by the first VLC device after detecting that the VPAN has a VPAN ID conflict, and the reporting indication message is further used to report a VPAN ID conflict to the coordinator.
  • the coordinator receives a VPAN ID conflict indication message sent by the second VLC device, where the VPAN ID conflict indication message is used to report a VPAN ID conflict to the coordinator;
  • the coordinator sends a report request message to the first VLC device, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, where the neighbor VPAN information includes VPAN ID information.
  • the coordinator maintains local neighbor VPAN information
  • the coordinator receives the reported local neighbor VPAN information, and the reported local neighbor VPAN information is the neighbor VPAN information reported to the coordinator and periodically or conditionally triggered by the at least one VLC device in the VPAN.
  • the neighbor VPAN information includes VPAN ID information;
  • the coordinator maintains global neighbor VPAN information according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator; the coordinator according to the reporting indication
  • the VPAN ID information in the message updates the global neighbor VPAN information, and selects a new VPAN ID according to the updated global neighbor VPAN information.
  • FIG. 6 is a schematic flowchart of another visible light-based communication method according to an embodiment of the present invention, which will be described from one side of the first coordinator in conjunction with FIG. 6, as shown in FIG. 6, the method may include The following steps S601 to S602.
  • Step S601 The first coordinator sends a scan request message to the first device by using a backhaul Backhaul link, where the first device includes a second coordinator and/or a central controller, and the first device and the first device The coordinator is connected by a Backhaul link, and the scan request message is used to request VPAN ID information from the first device.
  • the Backhaul link includes a wired link or a wireless link, wherein the wired link may include a power line communication PLC link or an Ethernet Ethernet link or a fiber link; the wireless link includes a Wi-Fi link or Cellular link or WiMax link or Bluetooth link or ZigBee link.
  • the first device includes a central controller, and the first coordinator further reports the VPAN ID of the VPAN where the first coordinator is located to the central controller by using a Backhaul link periodically or conditionally triggered. information. That is, all the coordinators connected to the central controller through the Backhaul link need to periodically or conditionally trigger the reporting of the VPAN ID information to the central controller, so that when the coordinator finds that the VPAN ID conflicts, the neighbor needs to be acquired. When the VPAN ID information is available, it can be relied upon.
  • the first coordinator before the first coordinator sends the scan request message to the first device by using the backhaul Backhaul link, the first coordinator receives the VPAN ID conflict indication message sent by the second device, where the VPAN ID conflict indication The message is used to report a VPAN ID conflict to the first coordinator. That is, the first coordinator is a scan request message sent to the first device under the condition that the conflict indication message of the second device (the VLC device in the VPAN where the first coordinator is located) is received.
  • the first coordinator sends a scan request message to the first device by using the backhaul Backhaul link, where the first coordinator sends the backhaul link to the first device before creating the VPAN. Scan request message. That is, the first coordinator takes precautions at the beginning of establishing its corresponding VPAN, and knows in advance the VPANID of other VPANs connected thereto, so as to avoid VPAN ID conflict after blindly selecting the VPAN ID and establishing the VPAN.
  • Step S602 The first coordinator receives the scan confirmation message sent by the first device, and selects a VPAN ID according to the VPAN ID information, where the scan confirmation message is that the first device receives the scan. After the request message is sent to the first coordinator, the scan confirmation message carries the VPAN ID information maintained by the first device.
  • the VPAN ID information maintained by the VPAN ID is changed accordingly.
  • the VPAN ID information maintained by the first device includes VPAN ID information of the VPAN where the second coordinator is located. Since the coordinators in all VPANs each store their own VPAN ID information, the first coordinator is equivalent to obtaining the VPAN ID information of each coordinator from each coordinator through the Backhaul link.
  • the VPAN ID information maintained by the first device includes VPAN ID information of a VPAN where the coordinator connected to the central controller through the Backhaul link is located.
  • the VPAN ID information corresponding to all the VPANs is stored in the central controller, so when the first coordinator needs to obtain related information, it can be directly obtained at the central controller without sending to each coordinator. Scan request.
  • the first coordinator selects the VPAN ID according to the VPAN ID information, generates a coordinator realignment message, and sends the coordinator realignment message to at least one VLC device in the VPAN, where
  • the device realignment message includes the selected VPAN ID and an effective time; at the effective time, the coordinator and the at least one VLC device use the selected VPAN ID.
  • the first coordinator broadcasts a beacon after selecting the VPAN ID according to the VPAN ID information, where the beacon includes the selected VPAN ID. That is, because when the VPAN initially establishes the selected VPAN ID, the related device in the VPAN has not yet learned the selected VPAN ID, so the coordinator is required to broadcast the beacon carrying the selected VPAN ID, so that the relevant device is informed and based on The VPAN ID performs subsequent synchronization, communication, and the like.
  • the specific manner in which the first coordinator selects a VPAN ID according to the VPAN ID information is that the first coordinator selects one of the VPAN IDs included in the VPAN ID information to be different. VPAN ID.
  • the specific execution flow of the embodiment of the present invention is described in detail when the first device is the second coordinator or the central controller.
  • FIG. 7 shows a distributed layout of LED lights (coordinators), each of which is an LED lamp, in FIG. 7,
  • Different coordinators are connected by backhaul links, which can be various wired connection links, such as power line communication (PLC) links, Ethernet links, fiber links, and the like. It can also be a wireless connection link, such as a Wi-Fi link or a cellular link or a WiMax link or a Bluetooth link or a ZigBee link, etc., and the present invention is not limited thereto.
  • the coordinator 1 (ie, corresponding to the first coordinator) is described as an execution subject, that is, the coordinator 1 is a coordinator of the VPAN to be established, or the VPAN ID conflict needs to be resolved.
  • the coordinator the problem to be solved is how to enable the coordinator 1 to receive the beacons sent by other coordinators, and then discover the VPAN ID carried in the beacon, so that the appropriate VPAN ID can be selected.
  • the method is also applicable to any coordinator in the figure, that is, the first device may be any coordinator based on the layout of the distributed LED lamp, and the above steps S601-S602 in the embodiment of the present invention.
  • the flow chart of the specific execution process is shown in Figure 8, which can be as follows:
  • the MLME of the coordinator 1 sends the scan request message to the second coordinator via the backhaul link;
  • the second coordinator (assumed to be the coordinator 2) receives the scan request message
  • the MLME of the coordinator 2 generates a scan confirmation message, the scan confirmation message contains the VPAN ID information of the VPAN where the coordinator 2 is located, and sends a scan confirmation message to the coordinator 1 through the backhaul link;
  • the MLME of the coordinator 1 After receiving the scan confirmation message, the MLME of the coordinator 1 generates a scan confirmation primitive, and provides the received VPAN ID information of other VPANs to the neighboring upper layer of the coordinator 1 through the primitive. At this point, the scanning process of the coordinator 1 is completed.
  • the first device is a central controller (based on a centralized structure), it is based on a centralized LED light layout as shown in FIG.
  • the central controller in Figure 9 is connected to each coordinator via a backhaul link, which is responsible for interference coordination between the various VPANs and switching of devices between different VPANs.
  • the central controller has basic information of each VPAN, and the information includes at least a VPAN ID and/or a coordinator address of the VPAN.
  • the way the central controller obtains this information is: when each VPAN is established, the VPAN coordinator reports this information to the central controller via the backhaul link.
  • the coordinator can report the above information to the central controller again through the backhaul link.
  • the specific execution process of the above steps S601 to S602 in the embodiment of the present invention may be as follows:
  • FIG. 10 A flowchart of a specific execution process of the foregoing steps S601 to S602 in the embodiment of the present invention is as shown in FIG. 10, and may be as follows:
  • the MLME of the coordinator 1 sends the scan request message to the central controller via the backhaul link;
  • the central controller receives the scan request message through a backhaul link
  • the central controller generates a scan confirmation message, the scan confirmation message contains the VPAN ID information of all VPANs acquired by the central controller, and sends a scan confirmation message to the coordinator 1 through the backhaul link;
  • the MLME of the coordinator 1 After receiving the scan confirmation message, the MLME of the coordinator 1 generates a scan confirmation primitive, and provides the received VPAN ID information of other VPANs to the neighboring upper layer of the coordinator 1 through the primitive. So far, the scanning process of the coordinator 1 is completed.
  • the present invention also provides a related device for cooperating with the implementation of the above solution.
  • FIG. 11 is a schematic structural diagram of a first VLC device according to an embodiment of the present invention.
  • the device 10 may include: a processing module 101 and a sending module 102.
  • the processing module 101 is configured to generate, when the VPAN conflict occurs, a report indication message, where the report indication message includes VPAN ID information detected by the first VLC device;
  • the sending module 102 is configured to send a report indication message to the coordinator.
  • processing module 101 is further configured to:
  • detecting the VPAN ID conflict of the VPAN After detecting the VPAN ID conflict of the VPAN, detecting the neighbor VPAN information in the first preset time period, where the neighbor VPAN information carries the VPAN ID information, and generates the report indication message, where the report indication message is further used. Reporting a VPAN ID conflict to the coordinator.
  • processing module 101 is further configured to:
  • the reporting indication message is generated, and the reporting indication message is further used to report a VPAN ID conflict to the coordinator.
  • the first VLC device 10 may further include a receiving module 103, wherein
  • the receiving module 103 is configured to receive a report request message sent by the coordinator, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, where the neighbor VPAN information includes VPAN ID information,
  • the report request message is a message sent by the coordinator to the first VLC device after receiving the VPAN ID conflict indication message, and the VPAN ID conflict indication message is detected by the second VLC device to generate the VPAN of the VPAN. a message sent to the coordinator after the ID conflicts;
  • the processing module 101 is further configured to generate, according to the detected neighbor VPAN information, the report indication message, where the neighbor VPAN information carries VPAN ID information.
  • the VPAN ID information is used by the coordinator to update global neighbor VPAN information according to the VPAN ID information, and select a new VPAN ID according to the updated global neighbor VPAN information;
  • the global neighbor VPAN information is the neighbor VPAN information maintained by the coordinator according to the received local neighbor VPAN information and the local neighbor VPAN information maintained by the coordinator;
  • the reported local neighbor VPAN information is at least one of the VPANs.
  • the neighboring VPAN information reported by the VLC device and periodically or conditionally triggered to the coordinator, the local neighbor VPAN information maintained by the VLC device is the neighbor VPAN information maintained by the coordinator, and the neighbor VPAN information includes the VPAN ID. information.
  • modules in the first VLC device 10 may be corresponding to the specific implementation manners in the foregoing method embodiments in FIG. 3 to FIG. 9 , and details are not described herein again.
  • the first VLC device 10 is presented in the form of a module.
  • the "module” herein may refer to an application-specific integrated circuit (ASIC), which is executed.
  • FIG. 12 is a schematic structural diagram of a coordinator according to an embodiment of the present invention.
  • the device 20 may include: a receiving module 201 and a processing module 202, where
  • the receiving module 201 is configured to receive, when the VPAN conflicts with the VPAN, the report indication message sent by the first VLC device, where the report indication message includes the VPAN ID information detected by the first VLC device;
  • the processing module 202 is configured to select a new VPAN ID according to the VPAN ID information.
  • processing module 202 is specifically configured to:
  • a VPAN ID that is different from the VPAN ID included in the VPAN ID information is selected.
  • processing module 202 is further configured to:
  • the reporting indication message is a message generated by the first VLC device after detecting the neighboring VPAN information in the first preset time period after detecting that the VPAN has a VPAN ID conflict.
  • the neighbor VPAN information carries the VPAN ID information, and the report indication message is further used to report the VPAN ID conflict to the coordinator.
  • the reporting indication message is a message generated after the first VLC device detects that the VPAN has a VPAN ID conflict, and the reporting indication message is further used to report the VPAN to the coordinator. ID conflict.
  • the device may further include a sending module 203, where
  • the receiving module 201 is further configured to receive a VPAN ID conflict indication message sent by the second VLC device, where the VPAN ID conflict indication message is used to report a VPAN ID conflict to the coordinator;
  • the sending module 203 is configured to send a report request message to the first VLC device, where the report request message is used to request the VLC device to send the detected neighbor VPAN information to the coordinator, where the neighbor VPAN information includes the VPAN ID information. .
  • processing module 202 is further configured to maintain local neighbor VPAN information
  • the receiving module 201 is further configured to receive the reported local neighbor VPAN information, where the reported local neighbor VPAN information is a neighbor that is reported to the coordinator and is periodically or conditionally triggered by the at least one VLC device in the VPAN.
  • VPAN information the neighbor VPAN information includes VPAN ID information;
  • the processing module 202 is further configured to: maintain the global neighbor VPAN information according to the received local neighbor VPAN information and the local neighbor VPAN information that is maintained by the user; the selecting module is specifically configured to: according to the reporting indication message
  • the VPAN ID information updates the global neighbor VPAN information, and selects a new VPAN ID according to the updated global neighbor VPAN information.
  • the coordinator 20 is presented in the form of a module.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. .
  • ASIC application-specific integrated circuit
  • FIG. 13 is a schematic structural diagram of a communication system provided by the present invention.
  • the system 30 includes: a VLC device 301 and a network access device 302, where
  • the VLC device 301 may be the first VLC device 10 in the above-described embodiment of FIG. 11; the network access device 302 may be the coordinator 20 in the above-described FIG. 12 embodiment. It can be understood that the system 30 in the embodiment of the present invention may further include other VLC devices and a central controller.
  • FIG. 14 is a schematic structural diagram of a first coordinator according to an embodiment of the present invention.
  • the device 40 can include: a sending module 401, a receiving module 402, and a processing module 403, where
  • the sending module 401 is configured to send, by using a backhaul Backhaul link, a scan request message to the first device, where the first device includes a second coordinator and/or a central controller, and the first device is coordinated with the first device The device is connected by a Backhaul link, and the scan request message is used to request VPAN ID information from the first device;
  • the receiving module 402 is configured to receive a scan confirmation message sent by the first device, where the scan confirmation message is sent by the first device to the first coordinator after receiving the scan request message, where the scan
  • the acknowledgment message carries the VPAN ID information maintained by the first device
  • the processing module 403 is configured to select a VPAN ID according to the VPAN ID information.
  • the first device includes a second coordinator; the VPAN ID information maintained by the first device includes VPAN ID information of a VPAN where the second coordinator is located.
  • the first device includes a central controller; the VPAN ID information maintained by the first device includes a VPAN of a coordinator connected to the central controller through a Backhaul link. VPAN ID information.
  • the sending module 401 is further configured to:
  • the VPAN ID information of the VPAN where the first coordinator is located is reported to the central controller by the periodic or conditional triggering of the Backhaul link.
  • the receiving module 402 is further configured to:
  • processing module 403 is further configured to:
  • the coordinator realignment message After selecting the VPAN ID according to the VPAN ID information, generating a coordinator realignment message, and transmitting the coordinator realignment message to at least one VLC device in the VPAN, where the coordinator realignment message includes the selected VPAN ID and effective time; at the effective time, the coordinator and the at least one VLC device use the selected VPAN ID.
  • the sending module 401 is specifically configured to send a scan request message to the first device by using a backhaul Backhaul link before creating the VPAN.
  • the sending module 401 is further configured to:
  • processing module 403 is specifically configured to:
  • a VPAN ID that is different from the VPAN ID included in the VPAN ID information is selected.
  • the Backhaul link includes a wired link or a wireless link, wherein the wired link includes a power line communication PLC link or an Ethernet Ethernet link or fiber A link that includes a Wi-Fi link or a cellular link or a WiMax link or a Bluetooth link or a ZigBee link.
  • the first coordinator is presented in the form of a module.
  • a “module” herein may refer to an application-specific integrated circuit (ASIC), a processor and memory that executes one or more software or firmware programs, integrated logic circuits, and/or other devices that provide the above functionality. .
  • ASIC application-specific integrated circuit
  • the device 50 includes at least one processor 501, at least one memory 502, and at least one communication interface 503.
  • the device may also include general components such as an antenna, which will not be described in detail herein.
  • the processor 501 can be a general purpose central processing unit (CPU), a microprocessor, an application-specific integrated circuit (ASIC), or one or more integrated circuits for controlling the execution of the above program.
  • CPU central processing unit
  • ASIC application-specific integrated circuit
  • the communication interface 503 is configured to communicate with other devices or communication networks, such as Ethernet, Radio Access Network (RAN), Wireless Local Area Networks (WLAN), and the like.
  • RAN Radio Access Network
  • WLAN Wireless Local Area Networks
  • the memory 502 can be a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (RAM) or other type that can store information and instructions.
  • the dynamic storage device can also be an Electrically Erasable Programmable Read-Only Memory (EEPROM), a Compact Disc Read-Only Memory (CD-ROM) or other optical disc storage, and a disc storage device. (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or can be used to carry or store desired program code in the form of instructions or data structures and can be Any other media accessed, but not limited to this.
  • the memory can exist independently and be connected to the processor via a bus.
  • the memory can also be integrated with the processor.
  • the memory 502 is configured to store application code for executing the above solution, and is processed by The device 501 controls the execution.
  • the processor 501 is configured to execute application code stored in the memory 1202.
  • the code stored in the memory 502 may perform the visible light-based communication method performed by the first VLC device provided above, such as sending a report to the coordinator if the VPAN has a VPANID conflict. And an indication message, where the report indication message includes VPAN ID information detected by the first VLC device.
  • the code stored in the memory 502 can perform the visible light-based communication method performed by the coordinator provided above, such as receiving the reporting indication sent by the first VLC device if the VPAN has a VPANID conflict.
  • the message, the report indication message includes VPAN ID information detected by the first VLC device, and the coordinator selects a new VPAN ID according to the VPAN ID information.
  • the code stored in the memory 502 may perform the visible light-based communication method performed by the first coordinator provided above, such as sending a scan request message to the first device through the backhaul Backhaul link.
  • the first device includes a second coordinator and/or a central controller, the first device is connected to the first coordinator through a Backhaul link, and the scan request message is used to the first device.
  • the scan confirmation message sent by the first coordinator carries the VPAN ID information maintained by the first device.
  • the embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium can store a program, and the program includes some or all of the steps of any of the visible light-based communication methods described in the foregoing method embodiments.
  • embodiments of the present invention can be provided as a method, apparatus (device), or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program is stored/distributed in a suitable medium, provided with other hardware or as part of the hardware, or in other distributed forms, such as over the Internet or other wired or wireless telecommunication systems.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

本发明实施例公开了一种基于可见光的通信方法、相关设备及系统，其中的方法可包括：在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；所述协调器接收所述第一VLC设备发送的所述上报指示消息；所述协调器根据所述VPAN ID信息选择新的VPAN ID。采用本发明可解决在存在VPAN ID冲突的情况下，VPAN中的协调器由于可能无法获取到其它协调器所在VPAN的VPAN ID信息，从而造成不能有效进行VPAN ID冲突分解的问题。

Description

一种基于可见光的通信方法、相关设备及系统 技术领域
本发明涉及通信技术领域，尤其涉及一种基于可见光的通信方法、相关设备及系统。
背景技术
近年来，可见光通信(Visible Light Communication，VLC)技术发展越来越迅速，成为逐渐兴起的无线通信技术，VLC指的是利用位于可见光频段范围内的电磁波作为通信的传输媒介的一种通信方式。其原理是通过改变发光二极管(Light Emitting Diode，LED)光源的强度来实现信号的传输，且由于光强度变化的频率很高，人眼不会察觉到光源的变化，因而可以在实现照明的基本功能的同时，实现通信功能。与传统的无线通信技术相比，VLC技术具有可用频谱宽、无电磁干扰、基础设备分布广泛、对人体安全和保密性好等诸多优点，因而近年来VLC技术得到了学术界和工业界的重视，并进入了飞速发展时期。
现有技术中，一个VLC网络称为一个可见光通信个域网(Visible Light Communication Personal Area Network，VPAN)，如图1所示是一个星型拓扑的VPAN，VPAN由一个协调器(Coordinator)和多个VLC设备组成，协调器是VPAN中的主节点(多由位于天花顶上的LED灯来担任)，负责VPAN的创建和管理，并为VLC设备(多由集成了VLC收发器的各类消费类电子产品，如智能手机、平板电脑、PC等来充当)提供网络接入；VLC设备则利用可见光作为传输载波，通过协调器接入VPAN进行通信。
根据IEEE 802.15.7标准，协调器在创建新的VPAN前，以及在检测到VPAN标识符(VPAN identifier，VPAN ID)冲突事件后，均需要进行主动扫描。VPAN主动扫描的目的是为了尽可能接收其它VPAN的协调器广播的信标，以了解其他VPAN的信息，当然这些信息就包括其它VPAN的VPAN ID信息。协调器在主动扫描结束后需要为本VPAN选择一个不同于其它VPAN 的VPAN ID以避免VPAN ID冲突。
然而，根据朗伯辐射模型光强分布计算公式可得出，部署在同一水平面的天花上的LED灯，其正确接收到其它LED灯信号的概率是极低的，因此协调器成功接收到其它协调器的信标的概率也是极低的。因此，现有技术中VPAN网络中协调器接收信标的方法亟待改善。
发明内容
本发明实施例所要解决的技术问题在于，提供一种基于可见光的通信方法、相关设备及系统，解决了信标的优化的问题。
第一方面，本发明实施例提供了一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，可包括：
在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，上报指示消息包括第一VLC设备检测到的VPAN ID信息；协调器接收第一VLC设备发送的上报指示消息；协调器根据VPAN ID信息选择新的VPAN ID，进而将VPAN中的协调器可能无法直接从其它协调器获取到的VPAN ID信息转而通过VPAN中的VLC设备进行接收和转发，而由于VLC设备与其它协调器之间的位置关系决定了其更容易获得其它协调器所在VPAN的VPAN ID信息，从而解决了的VPAN ID冲突可能无法有效进行分解的问题，提升了VPAN系统的运行效率，解决了信标的优化的问题。
结合第一方面，在第一种可能的实现方式中，协调器根据VPAN ID信息选择新的VPAN ID的具体实施方式为：协调器选择一个与VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。在本方法中，协调器选择不同于该VPAN ID信息中所包含的VPAN ID的ID作为新的VPAN ID，以避免再次发生冲突。
结合第一方面，或者，结合第一方面的第一种可能的实现方式，在第二种可能的实现方式中，协调器根据VPAN ID信息选择新的VPAN ID之后，协调器生成协调器重对齐消息，并向VPAN中的至少一个VLC设备发送协调器重对齐消息，协调器重对齐消息中包含了新的VPAN ID以及生效时间；VPAN中的至少一个VLC设备接收协调器重对齐消息；在生效时间，协调器和至少 一个VLC设备使用新的VPAN ID。在本方法中，协调器在选择了新的VPAN ID之后，生成相关的消息以通知VPAN中的VLC设备该协调器所在VPAN更换了新的VPAN ID，以便于VPAN中的VLC设备开始使用新的VPAN ID。
结合第一方面，或者，结合第一方面的第一种可能的实现方式，或者，结合第一方面的第二种可能的实现方式，在第三种可能的实现方式中，第一VLC设备向协调器发送上报指示消息之前，第一VLC设备检测到VPAN发生VPAN ID冲突后，第一VLC设备在第一预设时间段内检测邻居VPAN信息，生成上报指示消息，其中，邻居VPAN信息中包括VPAN ID信息，上报指示消息还用于向协调器上报VPAN ID冲突。即本方法中，VPAN ID冲突是由第一VLC设备发现并上报的，且上报的指示消息中包含了在一定时间段内检测到的邻居VPAN信息，从而可以检测到更多的邻居VPAN ID信息，减小后续再次产生VPAN ID冲突的可能性。
结合第一方面，或者，结合第一方面的第一种可能的实现方式，或者，结合第一方面的第二种可能的实现方式，在第四种可能的实现方式中，第一VLC设备向协调器发送上报指示消息之前，第一VLC设备检测到VPAN发生VPAN ID冲突后，生成上报指示消息，上报指示消息还用于向协调器上报VPAN ID冲突。即本方法中，VPAN ID是由第一VLC设备发现并上报的，且是发现冲突后就立即上报的，上报的指示消息中包含的VPAN ID信息则可以为第一VLC设备在发现VPAN ID冲突时以及在发现VPAN ID冲突之前检测的邻居VPAN ID信息，可以提升VLC设备发现冲突后上报冲突以及反馈VPAN ID信息的效率。
结合第一方面，或者，结合第一方面的第一种可能的实现方式，或者，结合第一方面的第二种可能的实现方式，在第五种可能的实现方式中，第一VLC设备向协调器发送上报指示消息之前，第二VLC设备检测到VPAN发生VPAN ID冲突后，向协调器发送VPAN ID冲突指示消息，VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；协调器接收第二VLC设备发送的VPAN ID冲突指示消息；协调器向第一VLC设备发送上报请求消息，上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，邻居VPAN信息中包括VPAN ID信息；第一VLC设备接收协调器发送的上报请求消息；第一 VLC设备根据检测到的邻居VPAN信息，生成上报指示消息，邻居VPAN信息中携带有VPAN ID信息。本方法中，由于是通过第一VLC设备以外的第二VLC设备上报的冲突，且由协调器获知冲突之后亲自指定第一VLC设备进行VPAN ID信息的反馈，增加了本发明实施方式的多样性和灵活性，并且可以让协调器根据其自身的推算或预测，主动的选择相关VLC设备进行VPAN ID信息的上报，更加有针对性的获取VPAN ID信息。
结合第一方面，或者，结合第一方面的第一种可能的实现方式，或者，结合第一方面的第二种可能的实现方式，或者，结合第一方面的第三种可能的实现方式，或者，结合第一方面的第四种可能的实现方式，或者，结合第一方面的第五种可能的实现方式，在第六种可能的实现方式中，所述方法，还包括：所述VPAN中的至少一个VLC设备和协调器维护各自的本地邻居VPAN信息，所述至少一个VLC设备周期性或条件触发的向协调器上报本地邻居VPAN信息，邻居VPAN信息包括VPAN ID信息；协调器接收上报的本地邻居VPAN信息；协调器根据接收到的上报的本地邻居VPAN信息和自身维护的本地邻居VPAN信息维护全局邻居VPAN信息；协调器根据VPAN ID信息选择新的VPAN ID，包括：协调器根据上报指示消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID。本方法中，由于增加了VLC设备和协调器自身进行VPAN ID信息的检测和维护的流程，使得协调器可以实时的掌握全局邻居VPAN信息，从而在发生VPAN ID冲突的时候，可以快速的获取更全面的邻居VPAN信息，进而有利于选择出最能避免再次发生冲突的新的VPAN ID，提升了VPAN系统的运行效率。
第二方面，本发明实施例提供了一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，可包括：
在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，上报指示消息包括第一VLC设备检测到的VPAN ID信息。
结合第二方面，在第一种可能的实现方式中，第一VLC设备向协调器发 送上报指示消息之前，包括：第一VLC设备检测到VPAN发生VPAN ID冲突后，第一VLC设备在第一预设时间段内检测邻居VPAN信息，生成上报指示消息，邻居VPAN信息中携带有VPAN ID信息，上报指示消息还用于向协调器上报VPAN ID冲突。
结合第二方面，在第二种可能的实现方式中，第一VLC设备向协调器发送上报指示消息之前，包括：第一VLC设备检测到VPAN发生VPAN ID冲突后，生成上报指示消息，上报指示消息还用于向协调器上报VPAN ID冲突。
结合第二方面，在第三种可能的实现方式中，第一VLC设备向协调器发送上报指示消息之前，包括：第一VLC设备接收协调器发送的上报请求消息，上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，邻居VPAN信息中包括VPAN ID信息，上报请求消息为协调器接收到VPAN ID冲突指示消息之后，向第一VLC设备发送的消息，VPAN ID冲突指示消息是由第二VLC设备检测到VPAN发生VPAN ID冲突后发送给协调器的消息；第一VLC设备根据检测到的邻居VPAN信息，生成上报指示消息，邻居VPAN信息中携带有VPAN ID信息。
结合第二方面，或者，结合第二方面的第一种可能的实现方式，或者，结合第二方面的第二种可能的实现方式，或者，结合第二方面的第三种可能的实现方式，在第四种可能的实现方式中，所述VPAN ID信息用于协调器根据VPAN ID信息并更新全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID；其中，全局邻居VPAN信息为协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息所维护的邻居VPAN信息；上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向协调器上报的邻居VPAN信息，自身维护的本地邻居VPAN信息为协调器维护的邻居VPAN信息，邻居VPAN信息包括VPAN ID信息。
第三方面，本发明实施例提供了一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，可包括：
在VPAN发生VPANID冲突的情况下，协调器接收第一VLC设备发送的上报指示消息，上报指示消息包括第一VLC设备检测到的VPAN ID信息，协调器根据VPAN ID信息选择新的VPAN ID。
结合第三方面，在第一种可能的实现方式中，协调器根据VPAN ID信息选择新的VPAN ID，包括：协调器选择一个与VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
结合第三方面，或者，结合第三方面的第一种可能的实现方式，在第二种可能的实现方式中，协调器根据VPAN ID信息选择新的VPAN ID之后，协调器生成协调器重对齐消息，并向VPAN中的至少一个VLC设备发送协调器重对齐消息，协调器重对齐消息中包含了新的VPAN ID以及生效时间；在生效时间，协调器和至少一个VLC设备使用新的VPAN ID。
结合第三方面，或者，结合第三方面的第一种可能的实现方式，或者，结合第三方面的第二种可能的实现方式，在第三种可能的实现方式中，上报指示消息为第一VLC设备在检测到VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息后生成的消息，邻居VPAN信息中携带有VPAN ID信息，上报指示消息还用于向协调器上报VPAN ID冲突。
结合第三方面，或者，结合第三方面的第一种可能的实现方式，或者，结合第三方面的第二种可能的实现方式，在第四种可能的实现方式中，上报指示消息为第一VLC设备检测到VPAN发生VPAN ID冲突后，生成的消息，上报指示消息还用于向协调器上报VPAN ID冲突。
结合第三方面，或者，结合第三方面的第一种可能的实现方式，或者，结合第三方面的第二种可能的实现方式，在第五种可能的实现方式中，协调器接收第一VLC设备发送的上报指示消息之前，包括：协调器接收第二VLC设备发送的VPAN ID冲突指示消息，VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；协调器向第一VLC设备发送上报请求消息，上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，邻居VPAN信息中包括VPAN ID信息。
结合第三方面，或者，结合第三方面的第一种可能的实现方式，或者，结合第三方面的第二种可能的实现方式，或者，结合第三方面的第三种可能的实 现方式，或者，结合第三方面的第四种可能的实现方式，或者，结合第三方面的第五种可能的实现方式，在第六种可能的实现方式中，所述方法，还包括：协调器维护本地邻居VPAN信息；协调器接收上报的本地邻居VPAN信息，上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向协调器上报的邻居VPAN信息，邻居VPAN信息包括VPAN ID信息；协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息维护全局邻居VPAN信息；协调器根据VPAN ID信息选择新的VPAN ID，包括：协调器根据上报指示消息中的VPAN ID信息更新全局邻居VPAN信息，并根据更新的全局邻居VPAN信息选择新的VPAN ID。
第四方面，本发明实施例提供了一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，可包括：
第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，其中，第一设备包括第二协调器和/或中心控制器，第一设备与第一协调器通过Backhaul链路连接，扫描请求消息用于向第一设备请求VPAN ID信息；第一协调器接收第一设备发送的扫描确认消息，并根据VPAN ID信息选择VPAN ID，其中，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，扫描确认消息中携带有第一设备所维护的VPAN ID信息。
结合第四方面，在第一种可能的实现方式中，第一设备包括第二协调器；第一设备所维护的VPAN ID信息包括第二协调器所在的VPAN的VPAN ID信息。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，在第二种可能的实现方式中，第一设备包括中心控制器；第一设备所维护的VPAN ID信息包括与中心控制器通过Backhaul链路连接的协调器所在的VPAN的VPAN ID信息。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，或者，结合第四方面的第二种可能的实现方式，在第三种可能的实现方式中，第一设备 包括中心控制器，方法还包括：第一协调器通过Backhaul链路周期性或条件触发的向中心控制器上报第一协调器所在VPAN的VPAN ID信息。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，或者，结合第四方面的第二种可能的实现方式，或者，结合第四方面的第三种可能的实现方式，在第四种可能的实现方式中，第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息之前，包括:第一协调器接收第二设备发送的VPAN ID冲突指示消息，VPAN ID冲突指示消息用于向第一协调器上报VPAN ID冲突。
结合第四方面的第四种可能的实现方式，在第五种可能的实现方式中，所述第一协调器根据所述VPAN ID信息选择VPAN ID之后，包括：所述第一协调器生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了选择的所述VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用选择的所述VPAN ID。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，或者，结合第四方面的第二种可能的实现方式，或者，结合第四方面的第三种可能的实现方式，在第六种可能的实现方式中，第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，包括：第一协调器在创建VPAN之前通过回程Backhaul链路向第一设备发送扫描请求消息。
结合第四方面的第六种可能的实现方式，在第七种可能的实现方式中，所述第一协调器根据所述VPAN ID信息选择VPAN ID之后，包括：所述第一协调器广播信标，所述信标中包含选择的所述VPAN ID。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，或者，结合第四方面的第二种可能的实现方式，或者，结合第四方面的第三种可能的实现方式，或者，结合第四方面的第四种可能的实现方式，或者，结合第四方面的第五种可能的实现方式，或者，结合第四方面的第六种可能的实现方式，或者，结合第四方面的第七种可能的实现方式，在第八种可能的实现方式中，所述第一协调器根据所述VPAN ID信息选择VPAN ID，包括：所述第一协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
结合第四方面，或者，结合第四方面的第一种可能的实现方式，或者，结合第四方面的第二种可能的实现方式，或者，结合第四方面的第三种可能的实现方式，或者，结合第四方面的第四种可能的实现方式，或者，结合第四方面的第五种可能的实现方式，或者，结合第四方面的第六种可能的实现方式，或者，结合第四方面的第七种可能的实现方式，或者，结合第四方面的第八种可能的实现方式，在第九种可能的实现方式中，Backhaul链路包括有线链路或无线链路，其中，有线链路包括电力线通信PLC链路或Ethernet以太网链路或光纤链路，无线链路包括Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路。
本发明实施例第五方面提供一种VLC设备，包含用于执行第二方面中的方法的模块。
本发明实施例第六方面提供一种网络接入设备，包含用于执行第三方面中的方法的模块。
本发明实施例第七方面提供一种网络接入设备，包含用于执行第四方面中的方法的模块。
本发明实施例第八方面提供一种设备，该设备中包括处理器，处理器被配置为支持该设备执行第二方面提供的一种基于可见光的通信方法中相应的功能。该设备还可以包括存储器，存储器用于与处理器耦合，其保存该设备必要的程序指令和数据。该设备还可以包括通信接口，用于该设备与其他设备或通信网络通信。
本发明实施例第九方面提供一种设备，该设备中包括处理器，处理器被配置为支持该设备执行第三方面提供的一种基于可见光的通信方法中相应的功能。该设备还可以包括存储器，存储器用于与处理器耦合，其保存该设备必要的程序指令和数据。该设备还可以包括通信接口，用于该设备与其他设备或通信网络通信。
本发明实施例第十方面提供一种设备，该设备中包括处理器，处理器被配置为支持该设备执行第四方面提供的一种基于可见光的通信方法中相应的功能。该设备还可以包括存储器，存储器用于与处理器耦合，其保存该设备必要的程序指令和数据。该设备还可以包括通信接口，用于该设备与其他设备或通 信网络通信。
本发明实施例第十一方面提供一种计算机存储介质，用于储存为上述第八方面提供的设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
本发明实施例第十二方面提供一种计算机存储介质，用于储存为上述第九方面提供的设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
本发明实施例第十三方面提供一种计算机存储介质，用于储存为上述第十方面提供的设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
本发明实施例第十四方面提供一种通信系统，包括第五方面提供的第一VLC备和/或第六方面提供的协调器。
本发明实施例，通过在VPAN系统中，其中，所述VPAN由一个协调器和至少一个可见光通信VLC设备组成，在VPAN发生VPANID冲突的情况下，该VPAN系统中的多个VLC设备中的第一VLC设备向协调器发送上报指示消息，该上报指示消息包含了第一VLC设备检测到的VPAN ID信息；协调器接收第一VLC设备发送的上报指示消息，并根据第一VLC设备发送的上报指示消息中包含的VPAN ID信息选择新的VPAN ID。即在VPAN发生VPAN ID冲突的情况下，本发明实施例通过将VPAN中的协调器可能无法直接从其它协调器获取到的VPAN ID信息转而通过VPAN中的VLC设备进行接收和转发，而由于VLC设备与其它协调器之间的位置关系决定了其更容易获得其它协调器所在VPAN的VPAN ID信息，从而解决了的VPAN ID冲突可能无法有效进行分解的问题，提升了VPAN系统的运行效率。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付 出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是星型拓扑的VPAN结构示意图；
图2是本发明实施例提供的VPAN系统架构图；
图3是本发明实施例提供的一种基于可见光的通信方法的流程示意图；
图4是本发明实施例提供的一种基于可见光的通信方法的一实施例的流程示意图；
图5是本发明实施例提供的一种基于可见光的通信方法的另一实施例的流程示意图；
图6是本发明实施例提供的另一种基于可见光的通信方法的流程示意图；
图7是本发明实施例提供的分布式LED灯布局图；
图8是本发明实施例提供的另一种基于可见光的通信方法的一实施例的流程示意图；
图9是本发明实施例提供的集中式LED灯布局图；
图10是本发明实施例提供的另一种基于可见光的通信方法的另实施例的流程示意图；
图11是本发明实施例提供的第一VLC设备的结构示意图；
图12是本发明实施例提供的协调器的结构示意图；
图13是本发明实施例提供的通信系统的结构示意图；
图14是本发明实施例提供的第一协调器的结构示意图；
图15是本发明实施例提供的一种设备的结构示意图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象，而不是用于描述特定顺序。此外，术语“包括”和“具有”以及它们任何变形，意图在于覆盖不排他的包含。例如包含了一 系列步骤或单元的过程、方法、系统、产品或设备没有限定于已列出的步骤或单元，而是可选地还包括没有列出的步骤或单元，或可选地还包括对于这些过程、方法、产品或设备固有的其它步骤或单元。
在本文中提及“实施例”意味着，结合实施例描述的特定特征、结构或特性可以包含在本发明的至少一个实施例中。在说明书中的各个位置出现该短语并不一定均是指相同的实施例，也不是与其它实施例互斥的独立的或备选的实施例。本领域技术人员显式地和隐式地理解的是，本文所描述的实施例可以与其它实施例相结合。
以下，对本申请中的部分用语进行解释说明，以便于本领域技术人员理解。
1)第一VLC设备和第二VLC设备是指可进行可见光通信的设备，例如，可以是终端，又称之为用户设备(User Equipment，UE)，是一种向用户提供语音和/或数据连通性的设备，例如，具有可见光通信功能的智能手机、平板电脑、媒体播放器、智能电视、智能手环、智能穿戴设备、MP3播放器(Moving Picture Experts Group Audio Layer III，动态影像专家压缩标准音频层面3)、MP4(Moving Picture Experts Group Audio Layer IV，动态影像专家压缩标准音频层面3)播放器、个人数字助理(Personal Digital Assistant,PDA)膝上型便携计算机和台式计算机等通信设备。协调器是可见光通信个域网VPAN的主节点，为VPAN中的终端提供网络接入，并对VPAN的运行进行管理和维护；一般协调器由位于天花顶上的发光二极管(Light Emitting Diode，LED)灯来担任；也可以是蜂窝网络中接入网侧的、具有可见光通信功能的无线接入网(Radio Access Network，RAN)设备，所谓RAN设备即是一种将终端接入到无线网络的设备，包括但不限于：演进型节点B(evolved Node B，eNB)、无线网络控制器(radio network controller，RNC)、节点B(Node B，NB)、基站控制器(Base Station Controller，BSC)、基站收发台(Base Transceiver Station,BTS)、家庭基站(例如，Home evolved NodeB，或Home Node B，HNB)、基带单元(BaseBand Unit，BBU)；再如，也可以是中心控制器，中心控制器是通过有线或无线连接链路、与各个VPAN的协调器相连接的全局控制节点，负责对各个VPAN的运行进行统一的协调和管理。
2)MAC层，本发明实施例中MAC层为VLC的MAC层，包括数据面和 管理面，MAC层的数据面负责将高层递交下来的业务数据进行MAC组帧以及对物理层递交上来的MAC帧进行拆帧，MAC层的管理面负责产生各种MAC层消息、以及识别MAC层收到的消息并根据MAC层消息内容执行相应的处理动作。
3)MAC层管理实体(MAC Layer Management Entity，MLME)，MLME为MAC层的管理面，管理面负责产生各种MAC层消息、以及识别MAC层收到的消息并根据MAC层消息内容执行相应的处理动作。
4)MAC层的邻近高层，为MAC层之上紧邻MAC层的协议层，该邻近高层可以为IEEE 1905.1标准中的抽象层，也可以为IP层或其它的协议层，本发明对此不作限制。MAC层和MAC层的邻近高层可以通过原语进行交互。
5)原语，是指协议栈中相邻两层之间进行交互时所交换的一组参数集合，参数集中是交互的一方为另一方所提供的一些必要信息。除了参数外，每一条原语还严格规定了其产生的条件、原语交互的目的、对方收到原语之后的处理动作等。一个完整的服务原语由名字、类型和参数组成。但除此之外，原语还需规定其产生的时机、原语的用途、收到原语之后的动作。
6)“多个”是指两个或两个以上。“和/或”，描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。字符“/”一般表示前后关联对象是一种“或”的关系。
下面结合附图对本申请的实施例进行描述。
为了便于理解本发明实施例，下面先对本发明实施例所基于的可见光通信个域网VPAN系统的架构进行描述。
请参阅图2，VPAN系统中包含有有多个VPAN(图2中仅以VPAN1和VPAN2为例)，图中的VPAN1和VPAN2均为星型拓扑结构，其中，VPAN1和VPAN2均包含一个协调器(如位于天花顶上的LED)和至少一个VLC设备(如集成了VLC收发器的智能手机、平板电脑、PC)，协调器是VPAN中的主节点，为VLC设备提供网络接入。VPAN1中的协调器1和VPAN2中的协调器2周期性地广播发送信标(信标中携带有VPAN运行所需的一些重要信息，如VPAN ID、协调器短地址、资源调度信息等)来向VPAN1和VPAN2 中的设备提供VPAN运行所需的信息。VPAN中的设备通过接收信标来与协调器保持同步，并根据信标中提供的信息接入VPAN以及在VPAN中正确运行。
由于每个VPAN都有一个用于标识该VPAN的VPAN ID，因此，协调器在创建VPAN时就需要确定即将创立的VPAN的VPAN ID。协调器如何确定VPAN ID一般标准中并不会规定，但是协调器选择的VPAN ID应尽量避免与其它VPAN选择的VPAN ID相同。如果两个不同的VPAN选择了相同的VPAN ID，则认为这两个VPAN的VPAN ID出现了冲突，此时就需要进行VPAN ID冲突分解。而又由于信标中携带有VPAN ID信息，因此协调器和设备只要能够检测到另一个VPAN的协调器发送的信标，就能够判断本VPAN的VPAN ID是否与这个邻居VPAN的VPAN ID发生了冲突。如果是VPAN中的协调器自己检测到了其它VPAN的协调器的信标，并发现本VPAN的VPAN ID与其它VPAN的VPAN ID相同，则协调器自己检测到了VPAN ID冲突事件；如果是VPAN中的设备检测到了其它VPAN的协调器的信标，并发现本VPAN的VPAN ID与其它VPAN的VPAN ID相同，则设备检测到了VPAN ID冲突，此时设备需要向协调器发送VPAN ID冲突指示消息以上报VPAN ID冲突事件，因此最终协调器也还是能够通过设备的上报来检测到此次VPAN ID冲突。无论是哪种方法检测到VPAN ID冲突，协调器都需要尽快为自己所在VPAN选择一个新的VPAN ID。其中，协调器是以超帧为时间周期对VPAN进行资源调度和管理，协调器在每个超帧中至少广播一次信标。
而按照前述的现有IEEE 802.15.7标准的规定，协调器在创建新的VPAN前，以及在检测到VPAN ID冲突事件后，均需要进行主动扫描并根据扫描结果为本VPAN选择一个合适的VPAN ID。如若信标无法正确可靠地接收，则协调器无法有效了解其他VPAN选择的VPAN ID情况，因此VPAN创建过程以及VPAN ID冲突分解过程中协调器不能为VPAN选择合理的VPAN ID，就有可能出现协调器选择的VPAN ID再次与其它VPAN的VPAN ID发生冲突的情况，则VPAN需要再次进行VPAN ID冲突分解，而VPAN ID冲突上报和分解会消耗VPAN中的资源，导致VPAN运行的低效。其中，协调器主动扫描过程具体如下：设备的邻近高层向设备的MLME发一条请求扫描原语(MLME-SCAN.request)，要求MLME进行主动扫描过程。此原语中规定了 主动扫描所需持续的时间。设备的MLME收到该原语之后，生成一个信标请求消息，并广播出去。设备在主动扫描持续时间内，接收其它协调器广播的信标。当扫描持续时间到后，设备的MLME向其邻近高层发送扫描确认原语(MLME-SCAN.confirm)，并在此原语上向邻近高层上报自己所检测到的所有VPAN的信息，该信息中就包括VPAN的VPAN ID信息。
可以理解的是，本发明实施例具体所应用的系统包括但不仅限于上述可见光通信个域网VPAN系统，也可以应用于融合了该可见光通信个域网VPAN系统的Wi-Fi、Zigbee、IR、蓝牙、LTE、GSM等异构融合网络系统，只要可以应用本发明中的基于可见光的通信方法的系统均属于本发明所保护和涵盖的范围。
参见图3，是本发明实施例中的一种基于可见光的通信方法的流程示意图，可应用于上述图2中所述的VPAN系统，下面将结合附图3从VPAN中的第一VLC设备、协调器的交互侧进行描述，其中，部分动作还涉及到第二VLC设备以及其它VLC设备。需要说明的是，第一VLC设备、第二VLC设备、协调器以及其它相关的VLC设备均为部署于同一个VPAN中的设备)。如图3所示，该方法可以包括以下步骤S301-步骤S303。
步骤S301：在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息。
步骤S302：所述协调器接收所述第一VLC设备发送的所述上报指示消息。
步骤S303：所述协调器根据所述VPAN ID信息选择新的VPAN ID。
具体地，协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID以避免与其所能获知的VPAN ID尽量不冲突(不重复)，从而避免后续可能产生的再次冲突。进一步地，协调器生成协调器重对齐消息，并向VPAN中的至少一个VLC设备(可以是一个、多个，也可以是所有)发送该协调器重对齐消息，其中，协调器重对齐消息中包含了上述新的VPAN ID以及生效时间；所述VPAN中的所述至少一个VLC设备接收所述协调器重对齐消息。在该生效时间到来时，协调器和获知了该新的VPAN ID的VLC设备开始使用该新的VPAN ID，至此上述VPAN的VPAN ID冲突得到了合理的解决。
在以上步骤S301中，检测出VPAN发生VPANID冲突的情况，可包含两种情形：一种是该VPAN中的VLC设备发现VPAN ID冲突并上报给协调器；另一种是协调器自己扫描发现的VPAN ID冲突，其具体可以包括以下几种实施方式:
实施方式一：
在第一VLC设备向协调器发送上报指示消息之前，第一VLC设备检测到VPAN发生VPAN ID冲突后，第一VLC设备在预设时间段内检测邻居VPAN信息，生成上报指示消息，其中，邻居VPAN信息中包括VPAN ID信息，上报指示消息还用于向协调器上报VPAN ID冲突。即本方法中，VPAN ID冲突是由第一VLC设备发现并上报的，且上报的指示消息中包含了在预设时间段内检测到的邻居VPAN信息，从而可以检测到更多的邻居VPAN ID信息，减小后续产生VPAN ID冲突的可能性。需要说明的是，本发明中各实施例中的邻居VPAN是指，相关VLC设备或协调器所能检测到的除自身所在VPAN以外的其它VPAN。本发明中各实施例中的邻居VPAN信息包括但不限于：邻居VPAN的VPAN ID、邻居VPAN的协调器地址(短地址或MAC地址)等。
VLC设备检测到邻居VPAN信息的方法可以是通过主动扫描过程来检测，也可以是通过被动扫描过程来检测，还可以是除主动扫描和被动扫描之外的其它检测过程，对此本发明不作限制。
其中，所述主动扫描过程在前述实施例中已经阐述，在此不再赘述。
所述被动扫描过程的过程如下：设备的邻近高层向设备的MLME发一条请求扫描原语(MLME-SCAN.request)，要求MLME进行被动扫描过程。此原语中规定了被动扫描所需持续的时间。设备的MLME收到该原语之后，在被动扫描持续时间内，接收其它协调器广播的信标。当被动扫描持续时间到后，设备的MLME向其邻近高层发送扫描确认原语(MLME-SCAN.confirm)，并在此原语上向邻近高层上报自己所检测到的所有VPAN的信息，该信息中就包括VPAN的VPAN ID信息。
所述除主动扫描和被动扫描之外的其它检测方法的其中一种方法是指，设备通过检测和接收邻居VPAN中的除信标之外的MAC帧来检测邻居VPAN信息，这些除信标帧之外的MAC帧包括命令帧、数据帧、控制帧、确认帧等。 由于除信标之外的MAC帧的帧头中一般会携带产生此MAC帧的VLC设备所在VPAN的VPAN ID信息，因此检测邻居VPAN的除信标之外的MAC帧也可以检测到邻居VPAN的VPAN ID。
所述除主动扫描和被动扫描之外的其它检测方法的另外一种方法是指，设备既检测邻居VPAN的信标帧，也检测邻居VPAN中除信标帧之外的其它MAC帧。
需要说明的是，所述除主动扫描和被动扫描之外的其它检测方法可以由协调器或设备设定只持续一段时间，也可以在VPAN运行过程中一直进行。
结合本实施方式一以及上述步骤S301-步骤S303，本发明实施例的具体执行过程的流程图如图4所示，可以如下：
(1)当第一VLC设备检测到了VPAN ID冲突事件之后(即第一VLC设备收到了VPAN ID与本VPAN的VPAN ID相同、但协调器地址与本VPAN协调器的地址不同的信标之后，就认为当前发生了VPAN ID冲突事件)，在预设时间内(比如预设时间为m个超帧的长度)检测邻居VPAN信息。所述检测邻居VPAN信息的过程在前述实施方式一中已经阐述，在此不再赘述。
(2)第一VLC设备检测完成后向协调器发送上报指示消息，该消息中携带有设备经过预设时间段内的检测所检测到的邻居VPAN信息。
(3)协调器的MLME收到第一VLC设备的VPAN ID冲突通知消息后，向自己的邻近高层发送一条MLME-LOSS-SYNC.indication原语，该原语中也携带有协调器从第一VLC设备处所收到的邻居VPAN信息。
可选的，协调器的MLME收到第一VLC设备的VPAN ID冲突通知消息后，先向第一VLC设备回复ACK帧，然后再向自己的邻近高层发送MLME-LOSS-SYNC.indication原语。
(4)协调器的邻近高层根据MLME在MLME-LOSS-SYNC.indication原语中所上报的邻居VPAN信息，为本VPAN选择一个新的VPAN ID。
可选的，邻居高层为本VPAN选择新的VPAN ID的方法是，选择一个与所述上报的邻居VPAN信息中任何一个VPAN的VPAN ID均不相同的VPAN ID。
至此，协调器已经完成了为VPAN选择新的VPAN ID的任务。
(5)邻近高层产生一条MLME-START.request原语，并将选择的新的VPAN ID携带在此原语中，协调器的MLME收到原语后产生并发送协调器重对齐消息，在该消息中指示了新的VPAN ID以及生效时间。
(6)VPAN中的设备收到协调器重对齐消息后，其MLME向邻近高层发MLME-SYNC-LOSS.indication，该原语中指示了接收到的新的VPAN ID。邻近高层收到原语后，通过MLME-SET.request原语让MLME对VPAN ID进行更新。在生效时间到来时，协调器和VPAN中的设备开始使用所述新的VPAN ID。至此，VPAN ID冲突的检测上报和分解过程完成。
实施方式二：
第一VLC设备向协调器发送上报指示消息之前，第一VLC设备检测到VPAN发生VPAN ID冲突后，生成上述上报指示消息，该上报指示消息还用于向协调器上报VPAN ID冲突。本实施方式与实施方式一的区别在于，第一VLC设备检测到冲突后，无需在预设时间内再进行邻居VPAN信息的检测，可立即生成上报指示消息，其中，上报指示消息可以是根据第一VLC设备发现VPAN ID冲突时检测接收到的VPAN ID信息生成的，也可以是根据此前第一VLC设备已经检测维护的历史VPAN ID信息生成的。即本方法中，VPAN ID冲突是由第一VLC设备发现并上报的，且是发现冲突后就立即上报的，上报指示消息中所包含的VPAN ID信息则可以为第一VLC设备当前检测到的或者之前检测维护的邻居VPAN ID信息，可以提升VLC设备发现冲突后上报VPAN ID冲突和VPAN ID信息的效率。可以理解的是，上报指示消息本身就可以具有指示VPAN发生了VPAN ID冲突的功能，即上报指示消息可以通过携带相关特征信息或者是不携带任何相关特征信息来进行冲突的指示。更具体的实施细节可以对应的参考实施方式一中的具体过程(1)—(6)。
实施方式三：
第一VLC设备向协调器发送上报指示消息之前，第二VLC设备检测到VPAN发生VPAN ID冲突后，向协调器发送VPAN ID冲突指示消息，VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；协调器接收第二VLC设备发送的VPAN ID冲突指示消息；协调器向第一VLC设备发送上报请求消息，上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，邻 居VPAN信息中包括VPAN ID信息；第一VLC设备接收协调器发送的上报请求消息；第一VLC设备根据检测到的邻居VPAN信息，生成上报指示消息，邻居VPAN信息中携带有VPAN ID信息。需要强调说明的是，本发明各个实施例中的第一VLC设备检测到的邻居VPAN信息，可以包括第一VLC设备发现冲突时所检测接收的邻居VPAN信息，也可以包括第一VLC设备此前已经检测维护的邻居VPAN信息，还可以包括第一VLC设备在检测到VPAN ID冲突后进行预设时间的检测后来获得的VPAN ID信息，即本发明对第一VLC设备具体是根据何时获得的邻居VPAN信息生成的上报指示信息，不作具体限定。另外，第一VLC设备检测邻居VPAN信息的过程在前述实施方式一中已经阐述，在此不再赘述。
本实施方式三不同于实施方式一和二的区别在于，实施例一和二中均是在第一VLC设备检测到VPAN ID冲突之后，再由第一VLC设备向协调器上报VPAN ID冲突事件。而实施方式三中则是第二VLC设备在检测到VPAN ID冲突之后立即上报给协调器，协调器获知后再指示VPAN中的第一VLC设备(第一VLC设备中可以包括第二VLC设备)进行其它VPAN的VPAN信息的检测。
结合本实施方式三以及上述步骤S301-步骤S303，本发明实施例的具体执行过程的流程图如图5所示，可以如下：
(1)当第二VLC设备检测到了VPAN ID冲突事件之后(即第二VLC设备收到了VPAN ID与本VPAN的VPAN ID相同、但协调器地址与本VPAN协调器的地址不同的信标之后，就认为当前发生了VPAN ID冲突事件)，向协调器发送VPAN ID冲突指示消息。
(2)协调器的MLME收到VPAN ID冲突指示消息后，向自己的邻近高层发送一条MLME-LOSS-SYNC.indication原语。
可选的，协调器的MLME收到第二VLC设备的VPAN ID冲突指示消息后，先向第二VLC设备回复ACK帧，然后再向自己的邻近高层发送MLME-LOSS-SYNC.indication原语。
(3)协调器的邻近高层收到MLME-LOSS-SYNC.indication原语后，知道当前发生了VPAN ID冲突事件，因此协调器的邻近高层产生一条上报请求原 语，并发送给协调器的MLME。
可选的，上报请求原语中携带有需要执行检测的设备地址信息和/或检测类型信息，其中需要执行检测的设备地址信息用于指示哪些设备需要进行邻居VPAN信息的检测，检测类型信息用于指示设备应进行主动扫描还是被动扫描，还是除主动扫描和被动扫描之外的其它检测方法。上述三种检测方法在实施方式一中均已阐述，在此不再赘述。
(4)协调器的MLME收到上报请求原语后，产生上报请求消息，并发送给第一VLC设备。第一VLC设备，可以是VPAN中的所有设备，也可以是协调器选定的、VPAN中的某些设备。可以理解的是，第一VLC设备可能包括第二VLC设备，也可能不包括第二VLC设备，如图5所示，图5中所示为包含了第二VLC设备的情况。如果第一VLC设备有多个，则协调器可以选择向第一VLC设备广播、多播、单播发送方式中的任何一种向第一VLC设备发送所述上报请求消息。
可选的，上报请求消息中还携带有检测类型信息，即协调器在上报请求消息中指示所述第一VLC设备应该执行何种检测来检测邻居VPAN信息。
(5)第一VLC设备收到上报请求消息后，开始执行邻居VPAN信息的检测；
可选的，如果在上报请求消息中携带有检测类型信息，则第一VLC设备按照消息中所述要求执行检测。
可选的，第一VLC设备的MLME收到了协调器的上报请求消息后，先向自己的邻近高层发送失步指示原语，然后再进行检测过程。
(6)第一VLC设备按要求执行检测之后，向协调器回复一条上报指示消息。上报指示消息中至少携带有第一VLC设备所检测到的邻居VPAN的VPAN ID信息。
需要说明的是以上步骤(5)和(6)为第一VLC设备在接收到协调器发送的上报请求消息后，即进行了VPAN ID信息的检测，再将检测结果上报给协调器；而本发明实施例中第一VLC设备也可以是在接收到上报请求消息之后，将本地的之前就已经检测到的或维护的VPAN ID信息进行反馈，因此，步骤(5)和(6)可以由该种方式进行替换，此处不再详述。
(7)协调器的MLME收到第一VLC设备的上报指示消息后，产生一条上报确认原语发送给协调器的邻近高层。
可选的，协调器的MLME可以是在每收到一条上报指示消息后，便向邻近高层发送上报确认原语，此时该原语中仅包含了发送这条上报指示消息的设备所检测到的VPAN ID信息。或者，协调器的MLME仅在收到了所有第一VLC设备的上报指示消息后，再向其邻近高层发送上报确认原语，此时该原语中包含了所有第一VLC设备所检测到的邻居VPAN的VPAN ID信息。或者，如果协调器在规定时间内未能收齐所有第一VLC设备的上报指示消息，则协调器认为未发送上报指示消息(也可能是第一VLC设备发送了上报指示消息，但协调器未能成功收到，由于协调器无法区分这两种情况，因此协调器均视为第一VLC设备未发生上报指示消息)的第一VLC设备执行检测失败，协调器的MLME在上报指示原语中也会将检测失败的设备信息上报给邻近高层。
(8)协调器的邻近高层为本VPAN选择一个新的VPAN ID。
可选的，邻居高层为本VPAN选择新的VPAN ID的方法是，选择一个与所述上报的邻居VPAN信息中任何一个VPAN的VPAN ID均不相同的VPAN ID。
至此，协调器已经完成了为VPAN选择新的VPAN ID的任务。
(9)邻近高层产生一条MLME-START.request原语，并将选择的新的VPAN ID携带在此原语中。协调器的MLME收到原语后产生并发送协调器重对齐消息，在该消息中指示了新的VPAN ID以及生效时间。
(10)VPAN中的设备收到协调器重对齐消息后，其MLME向邻近高层发MLME-SYNC-LOSS.indication，该原语中指示了接收到的新的VPAN ID。邻近高层收到原语后，通过MLME-SET.request原语让MLME对VPAN ID进行更新。在生效时间到来时，协调器和VPAN中的设备开始使用所述新的VPAN ID。至此，VPAN ID冲突的检测上报和分解过程完成。
基于此实施例，进一步地，当协调器按照现有技术去主动扫描之后，未搜到任何信标(或者即使搜到了一些信标)，协调器还是有理由怀疑一些协调器的信标自己没有通过这个扫描过程收到，因此协调器再按照实施方式三所述方法通知VLC设备去搜一遍，或者自己通过后述即将要描述的Backhaul链路去 搜索一遍。
实施方式四：
所述VPAN中的至少一个VLC设备和协调器均维护各自的本地邻居VPAN信息，所述至少一个VLC设备周期性或条件触发的向协调器上报本地邻居VPAN信息，邻居VPAN信息包括VPAN ID信息；协调器接收上报的本地邻居VPAN信息；协调器根据接收到的上报的本地邻居VPAN信息和自身维护的本地邻居VPAN信息维护全局邻居VPAN信息。具体地，VPAN中的一个或者多个甚至是所有的VLC设备，包括协调器自身都可以维护其各自的本地邻居信息，该本地邻居VPAN信息是VLC设备和协调器通过接收邻居VPAN的信标或其他MAC帧而检测到邻居VPAN信息，本地邻居VPAN信息由执行检测的设备和协调器各自存储和维护。同时，VLC设备还需要周期性(如每2个超帧上报1次)或条件触发的(比如，检测到一个新的邻居VPAN或连续多个超帧都没有检测到之前能够检测到的某个VPAN)向协调器上报各自维护的本地邻居VPAN信息。VLC设备上报本地邻居VPAN信息是通过向协调器发送上报指示消息来实现的。进一步地，协调器还需维护全局邻居VPAN信息，全局邻居VPAN信息是通过结合VLC设备上报的本地邻居VPAN信息以及协调器自身维护的本地邻居VPAN信息来维护的。由于VLC设备和协调器自身的本地邻居VPAN信息都是实时动态的，而且VLC设备也是实时上报本地邻居VPAN信息的，因此协调器维护的全局邻居VPAN信息是可以动态更新的。
结合以上实施方式四，本发明实施例中的步骤S303的具体执行过程为：协调器根据上报指示消息中的VPAN ID信息更新全局邻居VPAN信息，并根据更新的全局邻居VPAN信息选择新的VPAN ID。即协调器根据自身维护的本地邻居VPAN信息和VLC设备上报的邻居VPAN信息维护全局邻居VPAN信息，以便于后续出现VPAN ID冲突时，协调器可以有据可依，并在第一VLC设备发送上报指示消息后，再根据上报指示消息中的VPAN ID信息对全局邻居VPAN信息进行更新，以便合理的选择当前没有被使用的VPAN ID，避免再次发生VPAN ID冲突。
实施方式四相比于实施例一、二和三的区别在于，实施例四中协调器处维 护有全局邻居VPAN信息，当协调器通过VLC设备的上报发现了VPAN ID冲突之后，协调器可以根据第一VLC发送的上报指示消息对所维护的全局邻居VPAN信息进行更新，并根据更新的全局VPAN信息选择新的VPAN ID。需要强调说明的是，本实施方式四还可以分别结合实施方式一、二或三进行叠加实现，以用于追加说明关于协调器是如何获知VPAN ID冲突，第一VLC设备在何种条件下向该协调器发送上报指示消息，以及该上报指示消息的具体内容和作用，均可以对应地参考上述实施方式一、二和三，在此不再一一列举说明。
结合本实施方式四以及上述步骤S301-步骤S303，本发明实施例的具体执行过程可以如下：
(1)VPAN系统中的VLC设备和协调器都维护本地邻居VPAN信息，VLC设备和协调器获取和维护邻近VPAN检测信息的方法如下：
VPAN中的每个VLC设备(包括协调器自己)一旦检测和接收到其它VPAN中的信标帧或其他MAC帧之后，如果该信标帧或MAC帧中包含了一个之前未检测到VPAN ID信息，则VLC设备和协调器在自己所维护的本地邻居VPAN信息中添加一个新的VPAN ID记录，并记录该VPAN ID被检测到的时间。本地邻居VPAN信息中的每一个记录都有一个老化时间，即在某一个VPAN ID记录被添加之后，如果VLC设备和协调器未能在老化时间内再次检测到该VPAN ID，则该记录将会从本地邻居VPAN信息中删除。而如果VLC设备和协调器在老化时间内再次检测到了该VPAN ID，则VLC设备和协调器需要将该VPAN ID对应的检测时间更新为此次检测时的时间。此外，对于VLC设备来说它还需要周期性地或者条件触发地向协调器上报其本地邻居VPAN信息。比如VLC设备每2个超帧向协调器发送一次上报指示消息，或者VLC设备每次新检测到一个邻居VPAN ID之后向协调器发送上报指示消息，或者VLC设备删除一个邻居VPAN ID对应的记录之后向协调器发送上报指示消息。或者，VLC设备既需要周期性地向协调器发送上报指示消息，还需要在前述条件满足时也向协调器发送上报指示消息。所述的邻近VPAN信息可包括：VPAN ID、协调器地址(短地址或MAC地址)等。
协调器根据各个VLC设备上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息维护一个全局邻居VPAN信息，协调器维护全局邻居VPAN 信息的方法有多种，具体采用哪一种本发明不作限制。比如，协调器将所有VLC设备上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息进行汇总，维护一张如表1所示的全局邻居VPAN信息，其中的每一条记录及其对应的含义如表中所述。如果有VLC设备向协调器上报检测到了新的邻居VPAN，或者协调器自身新检测到了新的邻居VPAN，则协调器在该表中新增加一个VPAN描述符及相应的信息。如果有新的VLC设备检测到了表1中的某个邻居VPAN，则协调器更新表1中该VPAN描述符下的相应信息。如果有VLC设备向协调器上报在老化时间内都不再检测到之前某个能检测到的邻居VPAN，或者之前能检测到某个邻居VPAN的VLC设备离开了VPAN，或者协调器自己在老化时间内都不再检测到之前某个能检测到邻居VPAN，则协调器在该表中删除该VPAN描述符下该VLC设备或者协调器自己对应的信息。
表1
名称项 含义
邻居VPAN个数 本VPAN所能检测到的邻居VPAN的个数
VPAN描述符[0] 本VPAN所能检测到的第一个邻居VPAN的相关信息
检测到的设备个数 本VPAN中能检测到第一个邻居VPAN的设备的个数
设备地址[0] 本VPAN中能检测到第一个邻居VPAN的第一个设备的短地址
链路质量[0] 第一个设备检测到第一个邻居VPAN时的信号质量
……  
设备地址[K-1] 本VPAN中能检测到第一个邻居VPAN的最后一个设备的短地址
链路质量[K-1] 最后一个设备检测到第一个邻居VPAN时的信号质量
……  
VPAN描述符[N-1] 本VPAN所能检测到的最后一个邻居VPAN的相关信息
检测到的设备个数 本VPAN中能检测到最后一个邻居VPAN的设备的个数
设备地址[0] 本VPAN中能检测到最后一个邻居VPAN的第一个设备的短地址
链路质量[0] 第一个设备检测到最后一个邻居VPAN时的信号质量
……  
设备地址[L-1] 本VPAN中能检测到最后一个邻居VPAN的最后一个设备的短地址
链路质量[L-1] 最后一个设备检测到最后一个邻居VPAN时的信号质量
(2)当第二VLC设备检测到了VPAN ID冲突事件之后(即第二VLC设 备收到了VPAN ID与本VPAN的VPAN ID相同、但协调器地址与本VPAN协调器的地址不同的信标之后，就认为当前发生了VPAN ID冲突事件)，向协调器发送VPAN ID冲突指示消息。
可选地，第二VLC设备检测到了VPAN ID冲突事件之后，先按照实施方式一所述的检测方法先继续检测一段时间，检测完后再向协调器发送VPAN ID冲突指示消息。
(3)协调器接收到第二VLC设备发送的VPAN ID冲突指示消息后，根据自己所维护的全局邻居VPAN信息，为本VPAN选择一个新的VPAN ID。
可选的，协调器在为本VPAN选择新的VPAN ID之前，先通知本VPAN中的指定VLC设备(如第一VLC设备)进行一段时间的检测然后再上报，协调器根据此次第一VLC设备上报的VPAN ID信息对协调器自己维护的全局邻居VPAN信息进行更新，根据更新的全局邻居VPAN信息为本VPAN选择新的VPAN ID。其中，协调器通知本VPAN中的指定VLC设备进行一段时间的检测和上报或者是立即上报，其方法可以如实施方式三中相关方式进行，请参照对应描述，在此不再赘述。
基于此实施例，协调器要求本VPAN中的指定VLC设备进行检测时，其指定VLC设备的选择有几种可以选择的方法。比如，选择在表1中“设备地址”这一项出现过的那些VLC设备作为指定VLC设备，因为这些VLC设备能够检测到邻近VPAN，因此这些VLC设备作为指定VLC设备去进行检测时，它们能检测到其它VPAN的信标的概率相比于那些未在此项出现的VLC设备来说，概率要更大一些。
基于此实施例，进一步地，当协调器按照现有技术去主动扫描之后，未搜到任何信标(或者即使搜到了一些信标)，协调器还是有理由怀疑一些协调器的信标自己没有通过这个扫描过程收到，因此协调器再按照实施方式三所述方法通知VLC设备去搜一遍，或者自己通过后述即将要描述的Backhaul链路去搜索一遍。
以上为从VPAN中的第一VLC设备以及协调器的方法交互侧进行的实施例的阐述，可以理解的是，本发明同样保护在该方法交互过程中分别参与了执 行动作的第一VLC设备和协调器。其中，从第一VLC设备的单侧来说，其可以执行以下方法流程：
第一VLC设备在VPAN发生VPANID冲突的情况下，生成上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
第一VLC设备用于向协调器发送上报指示消息。
可选的，第一VLC设备检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息，所述邻居VPAN信息中携带有VPAN ID信息；第一VLC设备生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
可选的，第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
可选的，第一VLC设备接收所述协调器发送的上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息，所述上报请求消息为所述协调器接收到VPAN ID冲突指示消息之后，向所述第一VLC设备发送的消息，所述VPAN ID冲突指示消息是由第二VLC设备检测到所述VPAN发生VPAN ID冲突后发送给所述协调器的消息；
第一VLC设备根据检测到的邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息。
可选的，所述VPAN ID信息用于所述协调器根据所述VPAN ID信息更新全局邻居VPAN信息，并根据更新的全局邻居VPAN信息选择新的VPAN ID；其中，所述全局邻居VPAN信息为所述协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息维护的邻居VPAN信息；所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述自身维护的本地邻居VPAN信息为所述协调器维护的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息。
可理解的是，第一VLC设备执行的方法流程可对应参考上述图3至图5中的各方法实施例中的具体实现方式，这里不再赘述。
从协调器的单侧来说，其可以执行以下方法流程：
协调器在VPAN发生VPANID冲突的情况下，接收第一VLC设备发送的上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
协调器根据所述VPAN ID信息选择新的VPAN ID。
可选的，协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
可选的，协调器，生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了所述新的VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用所述新的VPAN ID。
可选的，所述上报指示消息为所述第一VLC设备在检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息后生成的消息，所述邻居VPAN信息中携带有VPAN ID信息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
可选的，所述上报指示消息为所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成的消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
可选的，协调器接收第二VLC设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；
协调器向所述第一VLC设备发送上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息。
可选的，协调器维护本地邻居VPAN信息；
协调器接收上报的本地邻居VPAN信息，所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息；
协调器根据接收到的所述上报的本地邻居VPAN信息以及自身维护的所述本地邻居VPAN信息维护全局邻居VPAN信息；协调器根据所述上报指示 消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID。
可理解的是，协调器执行的方法流程可对应参考上述图3至图5中的各方法实施例中的具体实现方式，这里不再赘述。
上述图3-图5对应的方法实施例主要用于解决VPAN在发生VPAN ID冲突时的冲突分解问题，以下实施例将主要从基于Backhaul链路的实施方式来有效获取其它VPAN的VPAN ID信息，并合理选择VPAN ID。参见图6，是本发明实施例中的另一种基于可见光的通信方法的流程示意图，下面将结合附图6从第一协调器的单侧进行描述，如图6所示，该方法可以包括以下步骤S601-步骤S602。
步骤S601：第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，其中，所述第一设备包括第二协调器和/或中心控制器，所述第一设备与所述第一协调器通过Backhaul链路连接，所述扫描请求消息用于向所述第一设备请求VPAN ID信息。
具体地，所述Backhaul链路包括有线链路或无线链路，其中，有线链路可包括电力线通信PLC链路或Ethernet以太网链路或光纤链路；无线链路包括Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路。
在一种可能的实现方式中，第一设备包括中心控制器，第一协调器还通过Backhaul链路周期性或条件触发的向所述中心控制器上报所述第一协调器所在VPAN的VPAN ID信息。即相当于与中心控制器通过Backhaul链路连接的所有协调器都需要周期性或条件触发的向中心控制器进行VPAN ID信息的上报，以便于后续有协调器发现VPAN ID冲突时，需要获取邻居VPAN ID信息时，可以有据可依。
在一种可能的实现方式中，第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息之前，第一协调器接收第二设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向所述第一协调器上报VPAN ID冲突。也即，第一协调器是在接收到了第二设备(第一协调器所在VPAN中的VLC设备)的冲突指示消息的条件下才向第一设备发送的扫描请求消息。
在一种可能的实现方式中，第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，具体为：所述第一协调器在创建VPAN之前通过回程Backhaul链路向第一设备发送扫描请求消息。即第一协调器在建立其对应的VPAN之初就未雨绸缪，提前获知与其相连接的其它VPAN的VPANID，避免在盲目选择了VPAN ID并建立VPAN之后发生VPAN ID冲突。
步骤S602：所述第一协调器接收所述第一设备发送的扫描确认消息，并根据所述VPAN ID信息选择VPAN ID，其中，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，所述扫描确认消息中携带有所述第一设备所维护的VPAN ID信息。
具体地，由于第一设备可以是协调器，也可以是中心控制器，还可以是两者的组合，因此其维护的VPAN ID信息也相应的发生变化。当第一设备包括第二协调器时；所述第一设备所维护的VPAN ID信息包括所述第二协调器所在的VPAN的VPAN ID信息。因为所有的VPAN中的协调器都各存储有自己的VPAN ID信息，因此第一协调器相当于通过Backhaul链路从各个协调器处获得各个协调器所在的VPAN ID信息。当第一设备包括中心控制器；所述第一设备所维护的VPAN ID信息包括与所述中心控制器通过Backhaul链路连接的协调器所在的VPAN的VPAN ID信息。此时相当于所有的VPAN的VPAN ID信息都存储在该中心控制器中，因此当第一协调器需要获取相关信息的时候可以直接去该中心控制器处获取，而无需向每个协调器发送扫描请求。
在一种可能的实现方式中，第一协调器根据所述VPAN ID信息选择VPAN ID之后，生成协调器重对齐消息，并向VPAN中的至少一个VLC设备发送所述协调器重对齐消息，其中，协调器重对齐消息中包含了选择的所述VPAN ID以及生效时间；在该生效时间，协调器和所述至少一个VLC设备使用选择的所述VPAN ID。
在一种可能的实现方式中，第一协调器根据所述VPAN ID信息选择VPAN ID之后广播信标，所述信标中包含选择的所述VPAN ID。即因为当VPAN初始建立选定VPAN ID后，该VPAN中的相关设备还没有获知该选定的VPAN ID，因此需要协调器广播携带有选择的VPAN ID的信标，以使得相关设备获知并根据该VPAN ID进行后续的同步、通信等交互。
在一种可能的实现方式中，所述第一协调器根据所述VPAN ID信息选择VPAN ID的具体实施方式为，第一协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
以下分别从第一设备为第二协调器或中心控制器时本发明实施例的具体执行流程进行详细的阐述：
当第一设备为第二协调器时(基于分布式的结构)，图7所示的是LED灯(协调器)的分布式布局，每个协调器都是一盏LED灯，图7中，不同的协调器通过backhaul链路连接，backhaul链路可以是各种有线连接链路，比如，电力线通信(PLC，power line communication)链路、以太网(Ethernet)链路、光纤链路等等，也可以是无线连接链路，比如，Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路等等，具体本发明不作限制。为描述的方便，接下来的方法描述中以协调器1(即对应第一协调器)为执行主体进行描述，即协调器1为即将要建立的VPAN的协调器，或者为需要解决VPAN ID冲突的协调器，要解决的问题是如何让协调器1能够收到其它协调器发送的信标，进而发现信标中所携带的VPAN ID，从而可以选择合适的VPAN ID。可以理解的是，该方法对于图中任意协调器也都是适用，即第一设备可以是基于上述分布式LED灯的布局中的任意协调器，本发明实施例中的上述步骤S601-步骤S602的具体执行过程的流程图如图8所示，可以如下：
(1)协调器1的MLME收到邻近高层的扫描请求原语之后，产生扫描请求消息；
(2)协调器1的MLME通过backhaul链路向第二协调器发送所述扫描请求消息；
(3)第二协调器(假设为协调器2)接收所述扫描请求消息
(4)协调器2的MLME产生扫描确认消息，扫描确认消息中包含了协调器2所在VPAN的VPAN ID信息，并通过backhaul链路将扫描确认消息发送给协调器1；
(5)协调器1的MLME收到扫描确认消息后，产生扫描确认原语，将收到的其它VPAN的VPAN ID信息通过此原语提供给协调器1的邻近高层。至此，协调器1的扫描过程完成。
当第一设备为中心控制器时(基于集中式的结构)，基于如图9所示的集中式LED灯布局。图9中的中心控制器通过backhaul链路与各个协调器相连，中心控制器负责各个VPAN之间的干扰协调以及设备在不同VPAN之间的切换。中心控制器处有各个VPAN的基本信息，这些信息至少包括VPAN ID和/或VPAN的协调器地址等。中心控制器获得这些信息的途径是：各个VPAN建立的时候，VPAN的协调器通过backhaul链路向中心控制器上报这些信息。VPAN运行过程中，如果上述信息发生了更改，协调器也可以再次通过backhaul链路向中心控制器上报上述信息。基于上述集中式LED灯布局，本发明实施例中的上述步骤S601-步骤S602的具体执行过程可以如下：
本发明实施例中的上述步骤S601-步骤S602的具体执行过程的流程图如图10所示，可以如下：
(1)协调器1的MLME收到邻近高层的扫描请求原语之后，产生扫描请求消息；
(2)协调器1的MLME通过backhaul链路向中心控制器发送所述扫描请求消息；
(3)中心控制器通过backhaul链路接收所述扫描请求消息；
(4)中心控制器产生扫描确认消息，扫描确认消息中包含了中心控制器所获取的所有VPAN的VPAN ID信息，并通过backhaul链路将扫描确认消息发送给协调器1；
(5)协调器1的MLME收到扫描确认消息后，产生扫描确认原语，将收到的其它VPAN的VPAN ID信息通过此原语提供给协调器1的邻近高层。至此，协调器1的扫描过程完成为了便于更好地实施本发明实施例的上述方案，本发明还提供了用于配合实施上述方案的相关设备。
下面结合附图描述本发明实施例用于实现以上方法实施例的装置。
参见图11，图11是本发明实施例提供的第一VLC设备的结构示意图，该设备10可包括：处理模块101和发送模块102其中
处理模块101，用于在VPAN发生VPANID冲突的情况下，生成上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
发送模块102，用于向协调器发送上报指示消息。
在一种可选的方案中，处理模块101，还用于：
检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息，所述邻居VPAN信息中携带有VPAN ID信息；生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
在又一种可选的方案中，处理模块101，还用于：
检测到所述VPAN发生VPAN ID冲突后，生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
在又一种可选的方案中，第一VLC设备10还可包括接收模块103，其中
接收模块103，用于接收所述协调器发送的上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息，所述上报请求消息为所述协调器接收到VPAN ID冲突指示消息之后，向所述第一VLC设备发送的消息，所述VPAN ID冲突指示消息是由第二VLC设备检测到所述VPAN发生VPAN ID冲突后发送给所述协调器的消息；
处理模块101，还用于根据检测到的邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息。
在又一种可选的方案中，所述VPAN ID信息用于所述协调器根据所述VPAN ID信息更新全局邻居VPAN信息，并根据更新的全局邻居VPAN信息选择新的VPAN ID；其中，所述全局邻居VPAN信息为所述协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息维护的邻居VPAN信息；所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述自身维护的本地邻居VPAN信息为所述协调器维护的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息。
可理解的是，第一VLC设备10中各模块的功能可对应参考上述图3至图9中的各方法实施例中的具体实现方式，这里不再赘述。
在本实施例中，第一VLC设备10是以模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行 一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
参见图12，图12是本发明实施例提供的协调器的结构示意图，该设备20可包括：接收模块201和处理模块202，其中
接收模块201，用于在VPAN发生VPANID冲突的情况下，接收第一VLC设备发送的上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
处理模块202，用于根据所述VPAN ID信息选择新的VPAN ID。
在一种可选的方案中，处理模块202具体用于：
选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
在又一种可选的方案中，处理模块202，还用于：
生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了所述新的VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用所述新的VPAN ID。
在又一种可选的方案中，所述上报指示消息为所述第一VLC设备在检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息后生成的消息，所述邻居VPAN信息中携带有VPAN ID信息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
在又一种可选的方案中，所述上报指示消息为所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成的消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
在又一种可选的方案中，所述设备，还可包括发送模块203，其中
接收模块201，还用于接收第二VLC设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；
发送模块203，用于向所述第一VLC设备发送上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息。
在又一种可选的方案中，处理模块202，还用于维护本地邻居VPAN信息；
接收模块201，还用于接收上报的本地邻居VPAN信息，所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息；
处理模块202，还用于根据接收到的所述上报的本地邻居VPAN信息以及自身维护的所述本地邻居VPAN信息维护全局邻居VPAN信息；所述选择模块具体用于：根据所述上报指示消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID。
可理解的是，协调器20中各模块的功能可对应参考上述图3至图9中的各方法实施例中的具体实现方式，这里不再赘述。
在本实施例中，协调器20是以模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
如图13所示的本发明提供的一种通信系统的结构示意图，系统30包括：VLC设备301和网络接入设备302，其中
VLC设备301可以为上述图11实施例中的第一VLC设备10；网络接入设备302可以为上述图12实施例中的协调器20。可理解的是，本发明实施例中的系统30还可以包括其它VLC设备和中心控制器等设备。
参见图14，图14是本发明实施例提供的第一协调器的结构示意图。该设备40可包括：发送模块401、接收模块402和处理模块403，其中
发送模块401，用于通过回程Backhaul链路向第一设备发送扫描请求消息，其中，所述第一设备包括第二协调器和/或中心控制器，所述第一设备与所述第一协调器通过Backhaul链路连接，所述扫描请求消息用于向所述第一设备请求VPAN ID信息；
接收模块402，用于接收所述第一设备发送的扫描确认消息，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，所述扫描确认消息中携带有所述第一设备所维护的VPAN ID信息；
处理模块403，用于根据所述VPAN ID信息选择VPAN ID。
在一种可选的方案中，所述第一设备包括第二协调器；所述第一设备所维护的VPAN ID信息包括所述第二协调器所在的VPAN的VPAN ID信息。
在又一种可选的方案中，所述第一设备包括中心控制器；所述第一设备所维护的VPAN ID信息包括与所述中心控制器通过Backhaul链路连接的协调器所在的VPAN的VPAN ID信息。
在又一种可选的方案中，发送模块401，还用于：
通过Backhaul链路周期性或条件触发的向所述中心控制器上报所述第一协调器所在VPAN的VPAN ID信息。
在又一种可选的方案中，接收模块402，还用于:
接收第二设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向所述第一协调器上报VPAN ID冲突。
在又一种可选的方案中，处理模块403，还用于：
根据所述VPAN ID信息选择VPAN ID之后，生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了选择的所述VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用选择的所述VPAN ID。
在又一种可选的方案中，发送模块401，具体用于：在创建VPAN之前通过回程Backhaul链路向第一设备发送扫描请求消息。
在又一种可选的方案中，发送模块401，还用于：
根据所述VPAN ID信息选择VPAN ID之后广播信标，所述信标中包含选择的所述VPAN ID。
在又一种可选的方案中，处理模块403，具体用于：
选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
在又一种可选的方案中，所述Backhaul链路包括有线链路或无线链路，其中，所述有线链路包括电力线通信PLC链路或Ethernet以太网链路或光纤 链路，所述无线链路包括Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路。
可理解的是，第一协调器40中各模块的功能可对应参考上述图3至图9中的各方法实施例中的具体实现方式，这里不再赘述。
在本实施例中，第一协调器是以模块的形式来呈现。这里的“模块”可以指特定应用集成电路(application-specific integrated circuit，ASIC)，执行一个或多个软件或固件程序的处理器和存储器，集成逻辑电路，和/或其他可以提供上述功能的器件。
如图15所示，第一VLC设备10、协调器20、第一协调器40以及相关的第二VLC设备或第二协调器、中心控制器等，均可以以图15中的结构来实现，该设备50包括至少一个处理器501，至少一个存储器502、至少一个通信接口503。此外，该设备还可以包括天线等通用部件，在此不再详述。
处理器501可以是通用中央处理器(CPU)，微处理器，特定应用集成电路(application-specific integrated circuit，ASIC)，或一个或多个用于控制以上方案程序执行的集成电路。
通信接口503，用于与其他设备或通信网络通信，如以太网，无线接入网(RAN)，无线局域网(Wireless Local Area Networks，WLAN)等。
存储器502可以是只读存储器(read-only memory，ROM)或可存储静态信息和指令的其他类型的静态存储设备，随机存取存储器(random access memory，RAM)或者可存储信息和指令的其他类型的动态存储设备，也可以是电可擦可编程只读存储器(Electrically Erasable Programmable Read-Only Memory，EEPROM)、只读光盘(Compact Disc Read-Only Memory，CD-ROM)或其他光盘存储、光碟存储(包括压缩光碟、激光碟、光碟、数字通用光碟、蓝光光碟等)、磁盘存储介质或者其他磁存储设备、或者能够用于携带或存储具有指令或数据结构形式的期望的程序代码并能够由计算机存取的任何其他介质，但不限于此。存储器可以是独立存在，通过总线与处理器相连接。存储器也可以和处理器集成在一起。
其中，所述存储器502用于存储执行以上方案的应用程序代码，并由处理 器501来控制执行。所述处理器501用于执行所述存储器1202中存储的应用程序代码。
图15所示的设备为第一VLC设备时，存储器502存储的代码可执行以上提供的第一VLC设备执行的基于可见光的通信方法，比如在VPAN发生VPANID冲突的情况下，向协调器发送上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息。
图15所示的设备为协调器时，存储器502存储的代码可执行以上提供的协调器执行的基于可见光的通信方法，比如在VPAN发生VPANID冲突的情况下，接收第一VLC设备发送的上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息，所述协调器根据所述VPAN ID信息选择新的VPAN ID。
图15所示的设备为第一协调器时，存储器502存储的代码可执行以上提供的第一协调器执行的基于可见光的通信方法，比如通过回程Backhaul链路向第一设备发送扫描请求消息，其中，所述第一设备包括第二协调器和/或中心控制器，所述第一设备与所述第一协调器通过Backhaul链路连接，所述扫描请求消息用于向所述第一设备请求VPAN ID信息；接收所述第一设备发送的扫描确认消息，并根据所述VPAN ID信息选择VPAN ID，其中，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，所述扫描确认消息中携带有所述第一设备所维护的VPAN ID信息。
可以理解的是，设备50中各功能模块的功能可对应参考上述图3至图9中的各方法实施例中的具体实现方式，这里不再赘述。
本发明实施例还提供一种计算机存储介质，其中，该计算机存储介质可存储有程序，该程序执行时包括上述方法实施例中记载的任何一种基于可见光的通信方法的部分或全部步骤。
尽管在此结合各实施例对本发明进行了描述，然而，在实施所要求保护的本发明过程中，本领域技术人员通过查看所述附图、公开内容、以及所附权利要求书，可理解并实现所述公开实施例的其他变化。在权利要求中，“包括”(comprising)一词不排除其他组成部分或步骤，“一”或“一个”不排除多个的 情况。单个处理器或其他单元可以实现权利要求中列举的若干项功能。相互不同的从属权利要求中记载了某些措施，但这并不表示这些措施不能组合起来产生良好的效果。
本领域技术人员应明白，本发明的实施例可提供为方法、装置(设备)、或计算机程序产品。因此，本发明可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本发明可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。计算机程序存储/分布在合适的介质中，与其它硬件一起提供或作为硬件的一部分，也可以采用其他分布形式，如通过Internet或其它有线或无线电信系统。
本发明是参照本发明实施例的方法、装置(设备)和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
尽管结合具体特征及其实施例对本发明进行了描述，显而易见的，在不脱离本发明的精神和范围的情况下，可对其进行各种修改和组合。这样，倘若本发明的这些修改和变型属于本发明权利要求及其等同技术的范围之内，则本发明也意图包含这些改动和变型在内。

Claims (52)

  1. 一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，其特征在于，包括：
    在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
    所述协调器接收所述第一VLC设备发送的所述上报指示消息；
    所述协调器根据所述VPAN ID信息选择新的VPAN ID。
  2. 如权利要求1所述的方法，其特征在于，所述协调器根据所述VPAN ID信息选择新的VPAN ID，包括：
    所述协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
  3. 如权利要求1或2所述的方法，其特征在于，所述协调器根据所述VPANID信息选择新的VPAN ID之后，包括：
    所述协调器生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了所述新的VPAN ID以及生效时间；
    所述VPAN中的所述至少一个VLC设备接收所述协调器重对齐消息；
    在所述生效时间，所述协调器和所述至少一个VLC设备使用所述新的VPAN ID。
  4. 如权利要求1-3任意一项所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，所述第一VLC设备在第一预设时间段内检测邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中包括VPAN ID信息，所述上报指示消息还用于向协调 器上报VPAN ID冲突。
  5. 如权利要求1-3任意一项所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  6. 如权利要求1-3任意一项所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    第二VLC设备检测到所述VPAN发生VPAN ID冲突后，向所述协调器发送VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；
    所述协调器接收所述第二VLC设备发送的所述VPAN ID冲突指示消息；
    所述协调器向所述第一VLC设备发送上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息；
    所述第一VLC设备接收所述协调器发送的上报请求消息；
    所述第一VLC设备根据检测到的邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息。
  7. 如权利要求1-6任意一项所述的方法，其特征在于，所述方法，还包括：
    所述VPAN中的至少一个VLC设备和所述协调器维护各自的本地邻居VPAN信息，所述至少一个VLC设备周期性或条件触发的向所述协调器上报本地邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息；
    所述协调器接收上报的本地邻居VPAN信息；
    所述协调器根据接收到的所述上报的本地邻居VPAN信息和自身维护的本地邻居VPAN信息维护全局邻居VPAN信息；
    所述协调器根据所述VPAN ID信息选择新的VPAN ID，包括：所述协调 器根据所述上报指示消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局VPAN信息选择新的VPAN ID。
  8. 一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，其特征在于，包括：
    在VPAN发生VPANID冲突的情况下，第一VLC设备向协调器发送上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息。
  9. 如权利要求8所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，所述第一VLC设备在第一预设时间段内检测邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  10. 如权利要求8所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  11. 如权利要求8所述的方法，其特征在于，所述第一VLC设备向协调器发送上报指示消息之前，包括：
    所述第一VLC设备接收所述协调器发送的上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息，所述上报请求消息为所述协调器接收到VPAN ID冲突指示消息之后，向所述第一VLC设备发送的消息，所述VPAN ID冲突指示消息是由第二VLC设备检测到所述VPAN发生VPAN ID冲突后发送给所述协调器的消息；
    所述第一VLC设备根据检测到的邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息。
  12. 如权利要求8-11所述的方法，其特征在于，所述VPAN ID信息用于所述协调器根据所述VPAN ID信息更新全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID；其中，所述全局邻居VPAN信息为所述协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息所维护的邻居VPAN信息；所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述自身维护的本地邻居VPAN信息为所述协调器维护的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息。
  13. 一种基于可见光通信的方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，其特征在于，包括：
    在VPAN发生VPANID冲突的情况下，所述协调器接收第一VLC设备发送的上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPANID信息；
    所述协调器根据所述VPAN ID信息选择新的VPAN ID。
  14. 如权利要求13所述的方法，其特征在于，所述协调器根据所述VPANID信息选择新的VPAN ID，包括：
    所述协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
  15. 如权利要求13或14所述的方法，其特征在于，所述协调器根据所述VPAN ID信息选择新的VPAN ID之后，包括：
    所述协调器生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了所述新的 VPAN ID以及生效时间；
    在所述生效时间，所述协调器和所述至少一个VLC设备使用所述新的VPAN ID。
  16. 如权利要求13-15任意一项所述的方法，其特征在于，所述上报指示消息为所述第一VLC设备在检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息后生成的消息，所述邻居VPAN信息中携带有VPAN ID信息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  17. 如权利要求13-15任意一项所述的方法，其特征在于，所述上报指示消息为所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成的消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  18. 如权利要求13-15任意一项所述的方法，其特征在于，所述协调器接收第一VLC设备发送的上报指示消息之前，包括：
    所述协调器接收第二VLC设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；
    所述协调器向所述第一VLC设备发送上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息。
  19. 如权利要求13-18任意一项所述的方法，其特征在于，所述方法，还包括：
    所述协调器维护本地邻居VPAN信息；
    所述协调器接收上报的本地邻居VPAN信息，所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息；
    所述协调器根据接收到的所述上报的本地邻居VPAN信息以及自身维护的所述本地邻居VPAN信息维护全局邻居VPAN信息；
    所述协调器根据所述VPAN ID信息选择新的VPAN ID，包括：所述协调器根据所述上报指示消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID。
  20. 一种基于可见光的通信方法，应用于可见光通信个域网VPAN系统中，所述VPAN包括一个协调器和至少一个可见光通信VLC设备，其特征在于，包括：
    第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，其中，所述第一设备包括第二协调器和/或中心控制器，所述第一设备与所述第一协调器通过Backhaul链路连接，所述扫描请求消息用于向所述第一设备请求VPAN ID信息；
    所述第一协调器接收所述第一设备发送的扫描确认消息，并根据所述VPAN ID信息选择VPAN ID，其中，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，所述扫描确认消息中携带有所述第一设备所维护的VPAN ID信息。
  21. 如权利要求20所述的方法，其特征在于，所述第一设备包括第二协调器；所述第一设备所维护的VPAN ID信息包括所述第二协调器所在的VPAN的VPAN ID信息。
  22. 如权利要求20或21所述的方法，其特征在于，所述第一设备包括中心控制器；所述第一设备所维护的VPAN ID信息包括与所述中心控制器通过Backhaul链路连接的协调器所在的VPAN的VPAN ID信息。
  23. 如权利要求20-22任意一项所述的方法，其特征在于，所述第一设备包括中心控制器，所述方法还包括：
    所述第一协调器通过Backhaul链路周期性或条件触发的向所述中心控制器上报所述第一协调器所在VPAN的VPAN ID信息。
  24. 如权利要求20-23任意一项所述的方法，其特征在于，所述第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息之前，包括:
    所述第一协调器接收第二设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向所述第一协调器上报VPAN ID冲突。
  25. 如权利要求24所述的方法，其特征在于，所述第一协调器根据所述VPAN ID信息选择VPAN ID之后，包括：
    所述第一协调器生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了选择的所述VPAN ID以及生效时间；
    在所述生效时间，所述协调器和所述至少一个VLC设备使用选择的所述VPAN ID。
  26. 如权利要求20-23任意一项所述的方法，其特征在于，所述第一协调器通过回程Backhaul链路向第一设备发送扫描请求消息，包括：所述第一协调器在创建VPAN之前通过回程Backhaul链路向第一设备发送扫描请求消息。
  27. 如权利要求26所述的方法，其特征在于，所述第一协调器根据所述VPAN ID信息选择VPAN ID之后，包括：
    所述第一协调器广播信标，所述信标中包含选择的所述VPAN ID。
  28. 如权利要求20-27任意一项所述的方法，其特征在于，所述第一协调器根据所述VPAN ID信息选择VPAN ID，包括：
    所述第一协调器选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
  29. 如权利要求20-28任意一项所述的方法，其特征在于，所述Backhaul链路包括有线链路或无线链路，其中，所述有线链路包括电力线通信PLC链 路或Ethernet以太网链路或光纤链路，所述无线链路包括Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路。
  30. 一种VLC设备，其特征在于，所述可见光通信VLC设备通过协调器接入可见光通信个域网VPAN，所述VLC设备为第一VLC设备，包括：
    处理模块，用于在VPAN发生VPANID冲突的情况下，生成上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
    发送模块，用于向协调器发送上报指示消息。
  31. 如权利要求30所述的设备，其特征在于，所述处理模块，还用于：
    检测到所述VPAN发生VPAN ID冲突后，在第一预设时间段内检测邻居VPAN信息，所述邻居VPAN信息中携带有VPAN ID信息；生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  32. 如权利要求30所述的设备，其特征在于，所述处理模块，还用于：
    检测到所述VPAN发生VPAN ID冲突后，生成所述上报指示消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  33. 如权利要求30所述的设备，其特征在于，所述VLC设备还包括接收模块，其中
    所述接收模块，用于接收所述协调器发送的上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息，所述上报请求消息为所述协调器接收到VPAN ID冲突指示消息之后，向所述第一VLC设备发送的消息，所述VPAN ID冲突指示消息是由第二VLC设备检测到所述VPAN发生VPAN ID冲突后发送给所述协调器的消息；
    所述处理模块，还用于根据检测到的邻居VPAN信息，生成所述上报指示消息，所述邻居VPAN信息中携带有VPAN ID信息。
  34. 如权利要求30-33所述的设备，其特征在于，所述VPAN ID信息用于所述协调器根据所述VPAN ID信息更新全局邻居VPAN信息，并根据更新的全局邻居VPAN信息选择新的VPAN ID；其中，所述全局邻居VPAN信息为所述协调器根据接收到的上报的本地邻居VPAN信息以及自身维护的本地邻居VPAN信息维护的邻居VPAN信息；所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述自身维护的本地邻居VPAN信息为所述协调器维护的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息。
  35. 一种网络接入设备，其特征在于，所述网络接入设备用于为可见光通信VLC设备提供可见光通信个域网VPAN接入，所述网络接入设备为协调器，包括：
    接收模块，用于在VPAN发生VPANID冲突的情况下，接收第一VLC设备发送的上报指示消息，所述上报指示消息包括所述第一VLC设备检测到的VPAN ID信息；
    处理模块，用于根据所述VPAN ID信息选择新的VPAN ID。
  36. 如权利要求35所述的设备，其特征在于，所述处理模块具体用于：
    选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
  37. 如权利要求35或36所述的设备，其特征在于，所述处理模块，还用于：
    生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了所述新的VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用所述新的VPAN ID。
  38. 如权利要求35-37任意一项所述的设备，其特征在于，所述上报指示消息为所述第一VLC设备在检测到所述VPAN发生VPAN ID冲突后，在第一 预设时间段内检测邻居VPAN信息后生成的消息，所述邻居VPAN信息中携带有VPAN ID信息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  39. 如权利要求35-37任意一项所述的设备，其特征在于，所述上报指示消息为所述第一VLC设备检测到所述VPAN发生VPAN ID冲突后，生成的消息，所述上报指示消息还用于向协调器上报VPAN ID冲突。
  40. 如权利要求35-37任意一项所述的设备，其特征在于，所述设备，还包括发送模块，其中
    所述接收模块，还用于接收第二VLC设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向协调器上报VPAN ID冲突；
    所述发送模块，用于向所述第一VLC设备发送上报请求消息，所述上报请求消息用于请求VLC设备将检测到的邻居VPAN信息发送给协调器，所述邻居VPAN信息中包括VPAN ID信息。
  41. 如权利要求35-40任意一项所述的设备，其特征在于，所述处理模块，还用于维护本地邻居VPAN信息；
    所述接收模块，还用于接收上报的本地邻居VPAN信息，所述上报的本地邻居VPAN信息为所述VPAN中的至少一个VLC设备维护的并周期性或条件触发的向所述协调器上报的邻居VPAN信息，所述邻居VPAN信息包括VPAN ID信息；
    所述处理模块，还用于根据接收到的所述上报的本地邻居VPAN信息以及自身维护的所述本地邻居VPAN信息维护全局邻居VPAN信息；根据所述上报指示消息中的VPAN ID信息更新所述全局邻居VPAN信息，并根据所述更新的全局邻居VPAN信息选择新的VPAN ID。
  42. 一种通信系统，其特征在于，包括VLC设备和/网络接入设备，其中
    所述VLC设备为如权利要求30-34任意一项所述的第一VLC设备；
    所述网络接入设备为如权利要求35-41任意一项所述的协调器。
  43. 一种网络接入设备，其特征在于，所述网络接入设备用于为可见光通信VLC设备提供可见光通信个域网VPAN接入，所述网络接入设备为第一协调器，包括：
    发送模块，用于通过回程Backhaul链路向第一设备发送扫描请求消息，其中，所述第一设备包括第二协调器和/或中心控制器，所述第一设备与所述第一协调器通过Backhaul链路连接，所述扫描请求消息用于向所述第一设备请求VPAN ID信息；
    接收模块，用于接收所述第一设备发送的扫描确认消息，所述扫描确认消息为所述第一设备接收到所述扫描请求消息后向所述第一协调器发送的，所述扫描确认消息中携带有所述第一设备所维护的VPAN ID信息；
    处理模块，用于根据所述VPAN ID信息选择VPAN ID。
  44. 如权利要求43所述的设备，其特征在于，所述第一设备包括第二协调器；所述第一设备所维护的VPAN ID信息包括所述第二协调器所在的VPAN的VPAN ID信息。
  45. 如权利要求43或44所述的设备，其特征在于，所述第一设备包括中心控制器；所述第一设备所维护的VPAN ID信息包括与所述中心控制器通过Backhaul链路连接的协调器所在的VPAN的VPAN ID信息。
  46. 如权利要求43-45任意一项所述的设备，其特征在于，所述发送模块，还用于：
    通过Backhaul链路周期性或条件触发的向所述中心控制器上报所述第一协调器所在VPAN的VPAN ID信息。
  47. 如权利要求43-46任意一项所述的设备，其特征在于，所述接收模块，还用于:
    接收第二设备发送的VPAN ID冲突指示消息，所述VPAN ID冲突指示消息用于向所述第一协调器上报VPAN ID冲突。
  48. 如权利要求47所述的设备，其特征在于，所述处理模块，还用于：
    根据所述VPAN ID信息选择VPAN ID之后，生成协调器重对齐消息，并向所述VPAN中的至少一个VLC设备发送所述协调器重对齐消息，所述协调器重对齐消息中包含了选择的所述VPAN ID以及生效时间；在所述生效时间，所述协调器和所述至少一个VLC设备使用选择的所述VPAN ID。
  49. 如权利要求43-46任意一项所述的设备，其特征在于，所述发送模块，具体用于：在创建VPAN之前通过回程Backhaul链路向第一设备发送扫描请求消息。
  50. 如权利要求49所述的设备，其特征在于，所述发送模块，还用于：
    根据所述VPAN ID信息选择VPAN ID之后广播信标，所述信标中包含选择的所述VPAN ID。
  51. 如权利要求43-50任意一项所述的设备，其特征在于，所述处理模块，具体用于：
    选择一个与所述VPAN ID信息中所包含的VPAN ID不相同的VPAN ID。
  52. 如权利要求43-51任意一项所述的设备，其特征在于，所述Backhaul链路包括有线链路或无线链路，其中，所述有线链路包括电力线通信PLC链路或Ethernet以太网链路或光纤链路，所述无线链路包括Wi-Fi链路或蜂窝链路或WiMax链路或蓝牙链路或ZigBee链路。
PCT/CN2016/080842 2016-04-29 2016-04-29 一种基于可见光的通信方法、相关设备及系统 WO2017185380A1 (zh)

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