CN115087063A - Optical communication link state feedback method, receiving method, device and equipment - Google Patents

Optical communication link state feedback method, receiving method, device and equipment Download PDF

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Publication number
CN115087063A
CN115087063A CN202110275793.8A CN202110275793A CN115087063A CN 115087063 A CN115087063 A CN 115087063A CN 202110275793 A CN202110275793 A CN 202110275793A CN 115087063 A CN115087063 A CN 115087063A
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China
Prior art keywords
visible light
downlink data
base station
data link
user equipment
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Chinese (zh)
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陆松鹤
张欣旺
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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China Mobile Communications Group Co Ltd
China Mobile Communications Ltd Research Institute
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/305—Handover due to radio link failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H04W88/085—Access point devices with remote components
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Optical Communication System (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method, a device and equipment for feeding back the state of an optical communication link, and a method, a device and equipment for receiving the state of the optical communication link, and relates to the technical field of communication. The method comprises the following steps: under the condition that a downlink data link of visible light communication is established with a server, the signal intensity of a visible light communication signal is obtained; feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal; the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications. The scheme of the invention ensures the normal transmission of the downlink data.

Description

Optical communication link state feedback method, receiving method, device and equipment
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a device for feeding back an optical communication link status.
Background
The technology of visible Light communication (LiFi) is to encode information by using the brightness of Light. Generally, a new generation of high-brightness Light Emitting Diode (LED) is used as a light source, and when the LED is turned on, it indicates 1, and when the LED is turned off, it indicates 0, so that binary data can be quickly encoded into a light signal and can be effectively transmitted. The visible light communication has the advantages of low cost, high density, high confidentiality, no harm to human bodies, no electromagnetic radiation, high-speed communication, nearly zero energy consumption and the like.
However, as a light source for visible light communication, a light signal generated by the light source is easily interfered by signals of other light sources in the environment, and normal transmission of downlink data cannot be guaranteed.
Disclosure of Invention
The invention aims to provide a method, a device and equipment for feeding back the state of an optical communication link, and a method, a device and equipment for receiving the state of the optical communication link, so as to ensure the normal transmission of downlink data.
To achieve the above object, an embodiment of the present invention provides an optical communication link state feedback method, executed by a user equipment, including:
under the condition that a downlink data link of visible light communication is established with a server, the signal intensity of a visible light communication signal is obtained;
feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the feeding back the state information of the downlink data link to the base station according to the signal strength of the visible light communication signal includes:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
Optionally, the method further comprises:
and under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold, if N is smaller than the second preset threshold, re-acquiring the signal intensity of the visible light communication signal, and updating the value of N to be N + 1.
Optionally, the status information includes a visible light communication quality indication LQI, or a visible light communication link indication LRFI.
Optionally, the feeding back the status information of the downlink data link to the base station includes:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Optionally, the sending the LQI or the LRFI to the base station through a physical uplink channel includes:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
To achieve the above object, an embodiment of the present invention provides an optical communication link status receiving method, executed by a base station, including:
receiving state information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the status information includes LQI or LRFI.
Optionally, the receiving the status information of the downlink data link fed back by the user equipment includes:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the receiving the LQI or the LRFI through the physical uplink channel includes:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the method further comprises:
and switching the downlink data link to a cellular network link when the received state information is the second state information.
To achieve the above object, an embodiment of the present invention provides an optical communication link state feedback apparatus, including:
the acquisition module is used for acquiring the signal intensity of the visible light communication signal under the condition of establishing a downlink data link of the visible light communication with the server;
a sending module, configured to feed back, to a base station, state information of the downlink data link according to the signal strength of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the sending module is further configured to:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
Optionally, the apparatus further comprises:
and the processing module is used for acquiring the signal intensity of the visible light communication signal again and updating the value of N to be N +1 if N is smaller than the second preset threshold under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold.
Optionally, the status information includes a visible light communication quality indication LQI, or a visible light communication link indication LRFI.
Optionally, the sending module is further configured to:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Optionally, the sending module is further configured to:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
To achieve the above object, an embodiment of the present invention provides an optical communication link status receiving apparatus, including:
a receiving module, configured to receive status information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through a base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the status information includes LQI or LRFI.
Optionally, the receiving module is further configured to:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the receiving module is further configured to:
receiving LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the apparatus further comprises:
a switching module, configured to switch the downlink data link to a cellular network link when the received state information is the information in the second state.
To achieve the above object, an embodiment of the present invention provides a user equipment, including a processor and a transceiver;
the processor is used for acquiring the signal intensity of the visible light communication signal under the condition of establishing a downlink data link of the visible light communication with the server;
the transceiver is used for feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the transceiver is further configured to:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
Optionally, the processor is further configured to:
and under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold, if N is smaller than the second preset threshold, re-acquiring the signal intensity of the visible light communication signal, and updating the value of N to be N + 1.
Optionally, the status information includes a visible light communication quality indication LQI, or a visible light communication link indication LRFI.
Optionally, the transceiver is further configured to:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Optionally, the transceiver is further configured to:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
To achieve the above object, an embodiment of the present invention provides a base station, including a transceiver configured to:
receiving state information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the status information includes LQI or LRFI.
Optionally, the transceiver is further configured to:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the transceiver is further configured to:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the base station further includes: a processor; the processor is configured to:
and switching the downlink data link to a cellular network link when the received state information is the second state information.
To achieve the above object, an embodiment of the present invention provides a communication apparatus, including: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; the processor, when executing the program or the instructions, implements the optical communication link state feedback method as performed by the user equipment as described above, or the optical communication link state reception method as performed by the base station as described above.
To achieve the above object, an embodiment of the present invention provides a readable storage medium on which a program or instructions are stored, which when executed by a processor, implement the optical communication link state feedback method performed by the user equipment as above or the steps in the optical communication link state reception method performed by the base station as above.
The technical scheme of the invention has the following beneficial effects:
according to the method provided by the embodiment of the invention, for the condition that the downlink data link of the visible light communication is established between the user equipment and the server, the signal intensity of the visible light communication signal can be obtained, and the current state information of the downlink data link can be fed back to the base station by the signal intensity of the visible light communication signal, so that the base station can complete the transmission of the downlink data based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
Drawings
Fig. 1 is a flowchart of an optical communication link state feedback method according to an embodiment of the present invention;
FIG. 2 is one of the schematic diagrams of 5G active indoor subsystem + Lifi data plane transmission;
FIG. 3 is a second schematic diagram of 5G active room subsystem + Lifi data plane transmission;
FIG. 4 is a schematic diagram of data plane transmission of a 5G passive room distribution system + Lifi;
FIG. 5 is a schematic diagram of an embodiment of the present invention;
fig. 6 is a schematic flow chart of the UE and NR base station in fig. 5 for feeding back status information;
fig. 7 is a flowchart of an optical communication link status receiving method according to an embodiment of the present invention;
fig. 8 is a structural diagram of an optical communication link status feedback apparatus according to an embodiment of the present invention;
fig. 9 is a structural diagram of an optical communication link status receiving apparatus according to an embodiment of the present invention;
fig. 10 is a block diagram of a user equipment of an embodiment of the present invention;
fig. 11 is a block diagram of a base station according to an embodiment of the present invention;
fig. 12 is a block diagram of a communication device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
In addition, the terms "system" and "network" are often used interchangeably herein.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
As shown in fig. 1, an optical communication link state feedback method according to an embodiment of the present invention is executed by a user equipment, and includes:
step 101, acquiring the signal intensity of a visible light communication signal under the condition of establishing a downlink data link of visible light communication with a server;
102, feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Here, the ue performing the method according to the embodiment of the present invention can establish a communication connection with the server through the base station, complete uplink and downlink data transmission with the server, and both the ue and the base station support visible light communication and cellular network communication. According to the above steps, for the condition that the downlink data link of the visible light communication is established with the server, the user equipment can feed back the current state information of the downlink data link to the base station by acquiring the signal intensity of the visible light communication signal, so that the base station can complete the transmission of the downlink data based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
It should be noted that, when the cellular network is a 5G network, the data plane transmission of the user equipment UE and the server is as shown in fig. 2, 3 and 4. Wherein, fig. 2 and fig. 3 are the data plane transmission of 5G active room subsystem + Lifi, and fig. 4 is the data plane transmission of 5G passive room subsystem + Lifi. Here, the UE executes the optical communication link state feedback method according to the embodiment of the present invention, and for the downlink data link established for the visible light communication with the server, after acquiring the signal strength of the visible light communication signal, feeds back the state information of the downlink data link to the base station according to the signal strength of the visible light communication signal, so that the base station knows the current state of the downlink data link, determines the transmission link of the downlink data, and completes effective transmission of the downlink data.
In this embodiment, the visible light communication signal (i.e., the LiFi signal) is generated by the light source LED, and may be a reference signal, a broadcast signal, or the like. And the feedback state of the downlink is actually the state of the downlink between the LED and the UE.
Moreover, in this embodiment, optionally, the acquiring the signal strength of the visible light communication signal includes: dynamically acquiring the signal intensity of the visible light communication signal based on the acquisition of the instruction, such as in response to a measurement instruction of a base station; alternatively, the signal strength of the visible light communication signal is actively measured periodically based on a defined or configured period T.
In addition, in this embodiment, to determine the state of the downlink data link of the current visible light communication, a threshold used for link determination is predefined or configured in advance, that is, a first preset threshold and a second preset threshold, where the first preset threshold corresponds to the signal strength, and the second preset threshold corresponds to the number of consecutive times.
Thus, optionally, step 102 comprises:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
That is, for the signal intensity X of the obtained visible light communication signal, when X is greater than or equal to the first preset threshold a, it can be determined that the downlink data link of the visible light communication is normal, that is, downlink data transmission can be performed; when X is smaller than a first preset threshold a and N is greater than or equal to a second preset threshold B, it can be determined that the downlink of the visible light communication is invalid, that is, the downlink data cannot be effectively transmitted.
Optionally, the method further comprises:
and under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold, if N is smaller than the second preset threshold, re-acquiring the signal intensity of the visible light communication signal, and updating the value of N to be N + 1.
Thus, N is the number of consecutive failures of the downlink data link. If a counter W is set to count the continuous failure times of the downlink data link, determining that X1 is smaller than A for the first time, and recording N as 1; if the next time X2 is still smaller than a, recording N ═ 1+1 ═ 2, and re-acquiring the signal strength of the visible light communication signal and comparing it with a; if X2 is greater than or equal to a, the counter W is cleared.
Optionally, in this embodiment, the status information includes a visible Light Quality Index (LQI) or a visible light communication link failure indication (LRFI).
Wherein, LQI is defined as the following table 1:
TABLE 1
Figure BDA0002976573810000101
Then, the base station may determine that the downlink data link is normal by the received LQI being "1"; otherwise, the downlink data link is determined to be failed by the received LQI being "0".
Wherein, LRFI is defined as following table 2:
TABLE 2
Figure BDA0002976573810000102
Then, the base station may determine that the downlink data link is normal by the received LRFI being "1"; otherwise, the downlink data link is determined to be failed by the received LRFI being "0".
Optionally, the feeding back the status information of the downlink data link to the base station includes:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
That is, if the UE transmits the LQI through the PUCCH or the PUSCH, the base station receives and analyzes the PUCCH or the PUSCH to obtain the LQI. And if the UE sends the LRFI through the PUCCH or the PUSCH, the base station receives and analyzes the PUCCH or the PUSCH to obtain the LRFI.
Furthermore, optionally, in this embodiment, the sending the LQI or the LRFI to the base station through a physical uplink channel includes:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
As can be seen, the target period is shown in table 3 below:
TABLE 3
Figure BDA0002976573810000111
As such, when the LQI or LRFI is fed back according to the target period, the target period may be the same as the period of the CQI, RI, or PMI, and may be predefined or configured. Of course, for different physical uplink channels to be transmitted, CQI, RI or PMI is associated with the physical uplink channel.
Of course, the base station can correspondingly transmit downlink data through a downlink data link of visible light communication when the received state information is the information of the first state; when the state information is information of the second state, the downlink is switched from the visible light communication to the cellular network communication, and the downlink data is transmitted. The cellular network communication system part of the base station supporting cellular network communication informs the visible light communication system part of the base station supporting visible light communication of the received information of the first state, and sends downlink data.
Next, a specific application of the method according to the embodiment of the present invention is described with reference to fig. 5 (when in the foreground, both the UE and the NR base station support visible light communication and NR communication):
the UE establishes a downlink data link (i.e., a Lifi link) for visible light communication with the server. Then, the UE periodically measures the signal intensity X of the Lifi signal, and compares the X with a first preset threshold A.
If X is greater than or equal to A, then the signal strength of the Lifi signal can guarantee that the Lifi link normally works, and it is determined that the Lifi link is normal. And the UE transmits the corresponding LQI or LRFI to the NR base station through the PUCCH/PUSCH. And the NR base station determines that the Lifi link is normal through the LQI or the LRFI, and sends downlink data.
If X is smaller than A and the Lifi link is continuously invalid, the continuous updating times N of the counter W are N +1, and the updated N is compared with a second preset threshold B.
And if the updated N is greater than or equal to B, determining that the Lifi link fails. And the UE transmits the corresponding LQI or LRFI to the NR base station through the PUCCH/PUSCH. The NR base station switches the downlink data link from Lifi to NR.
And if the updated N is smaller than B, returning to measure the signal intensity of the Lifi signal again. When the counting is not continuously added with 1, the counter W clears N and starts to count again.
In the above scenario, since both the UE and the NR base station support visible light communication and NR communication, the UE includes a visible light communication system portion (i.e., Lifi-UE) and an NR communication system portion (i.e., NR-UE), and the NR base station includes a visible light communication system portion (i.e., Lifi-NB) and an NR communication system portion (i.e., NR-NB). Thus, as shown in fig. 6, after the Lifi-UE measures the signal strength of the Lifi signal (such as the reference signal or the broadcast signal) sent by the Lifi-NB, the NR-UE is informed of the status information of the Lifi link. And the NR-UE feeds back the state information of the Lifi link to the NR-NB through the NR UL link. The NR-NB informs the Lifi-NB of the information of the first state when the state information is the information of the first state, and sends downlink data on a Lifi link; and when the state information is the information of the second state, switching the downlink data link from Lifi to NR, and transmitting the downlink data on the NR link.
In summary, in the method of the embodiment of the present invention, for the condition that the ue and the server establish the downlink data link for visible light communication, the signal strength of the visible light communication signal can be obtained, and the current state information of the downlink data link is fed back to the base station by the signal strength of the visible light communication signal, so that the base station can complete downlink data transmission based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
As shown in fig. 7, an embodiment of the present invention provides an optical communication link status receiving method, which is executed by a base station, and includes:
step 701, receiving status information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Here, the status information is fed back to the base station by the user equipment according to the signal strength of the visible light communication signal by acquiring the signal strength of the visible light communication signal, so that the base station can complete transmission of downlink data based on the current status of the downlink data link by receiving the status information, thereby ensuring the transmission effectiveness of the downlink data.
Optionally, the status information includes LQI or LRFI.
Optionally, the receiving the status information of the downlink data link fed back by the user equipment includes:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the receiving the LQI or the LRFI through the physical uplink channel includes:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the method further comprises:
and switching the downlink data link to a cellular network link when the received state information is the second state information.
Namely, when the downlink data link of the visible light communication is normal, the base station can complete the transmission of the downlink data through the Lifi link, and when the downlink data link of the visible light communication fails, the visible light communication is switched to the cellular network communication, and the cellular network communication link completes the transmission of the downlink data, so that the transmission effectiveness of the downlink data is ensured.
It should be noted that the method is implemented in cooperation with the optical communication link state feedback method executed by the user equipment, and the implementation manner of the embodiment of the optical communication link state feedback method is applicable to the method and can achieve the same technical effect.
As shown in fig. 8, an optical communication link state feedback apparatus according to an embodiment of the present invention includes:
an obtaining module 810, configured to obtain a signal intensity of a visible light communication signal when a downlink data link of visible light communication is established with a server;
a sending module 820, configured to feed back, to a base station, state information of the downlink data link according to the signal strength of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the sending module is further configured to:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
Optionally, the apparatus further comprises:
and the processing module is used for acquiring the signal intensity of the visible light communication signal again and updating the value of N to be N +1 if N is smaller than the second preset threshold under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold.
Optionally, the status information includes a visible light communication quality indication LQI, or a visible light communication link indication LRFI.
Optionally, the sending module is further configured to:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Optionally, the sending module is further configured to:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
The device can feed back the current state information of the downlink data link to the base station by acquiring the signal intensity of the visible light communication signal under the condition that the downlink data link of the visible light communication is established with the server, so that the base station can finish the transmission of the downlink data based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
The device applies the optical communication link state feedback method, and the implementation mode of the embodiment of the optical communication link state feedback method is suitable for the method and can also achieve the same technical effect.
As shown in fig. 9, an embodiment of the present invention provides an optical communication link status receiving apparatus, including:
a receiving module 910, configured to receive status information of a downlink fed back by a user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through a base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the status information includes LQI or LRFI.
Optionally, the receiving module is further configured to:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the receiving module is further configured to:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the apparatus further comprises:
a switching module, configured to switch the downlink data link to a cellular network link when the received state information is the information in the second state.
The device can complete the transmission of the downlink data based on the current state of the downlink data link by receiving the state information, because the state information is obtained by the user equipment through acquiring the signal intensity of the visible light communication signal and is fed back to the base station by the signal intensity of the visible light communication signal, and the transmission effectiveness of the downlink data is ensured.
The device applies the optical communication link state receiving method, and the implementation mode of the embodiment of the optical communication link state receiving method is suitable for the method and can also achieve the same technical effect.
As shown in fig. 10, a user equipment 1000 according to an embodiment of the present invention includes a processor 1010 and a transceiver 1020;
the processor is used for acquiring the signal intensity of the visible light communication signal under the condition of establishing a downlink data link of the visible light communication with the server;
the transceiver is used for feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the transceiver is further configured to:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
Optionally, the processor is further configured to:
and under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold, if N is smaller than the second preset threshold, re-acquiring the signal intensity of the visible light communication signal, and updating the value of N to be N + 1.
Optionally, the status information includes a visible light communication quality indication LQI, or a visible light communication link indication LRFI.
Optionally, the transceiver is further configured to:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
Optionally, the transceiver is further configured to:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
The user equipment can feed back the current state information of the downlink data link to the base station by the signal intensity of the visible light communication signal through acquiring the signal intensity of the visible light communication signal under the condition that the downlink data link of the visible light communication is established with the server, so that the base station can finish the transmission of the downlink data based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
It should be noted that, the user equipment applies the apparatus of the optical communication link state feedback method, and the embodiment of the method is applicable to the user equipment, and can also achieve the same technical effect.
As shown in fig. 11, an embodiment of the present invention provides a base station 1100, including a transceiver 1110, where the transceiver 1110 is configured to:
receiving state information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
Optionally, the status information includes LQI or LRFI.
Optionally, the transceiver is further configured to:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
Optionally, the transceiver is further configured to:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
Optionally, the status information includes:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
Optionally, the base station further includes: a processor 1120; the processor 1120 is configured to:
and switching the downlink data link to a cellular network link when the received state information is the information of the second state.
The base station receives the state information, and the state information is fed back to the base station by the user equipment through acquiring the signal intensity of the visible light communication signal and the signal intensity of the visible light communication signal, so that the downlink data can be transmitted based on the current state of the downlink data link, and the transmission effectiveness of the downlink data is ensured.
The base station applies the optical communication link state receiving method, and the implementation manner of the embodiment of the optical communication link state receiving method is suitable for the method and can achieve the same technical effect.
A communication device according to another embodiment of the present invention, as shown in fig. 12, includes a transceiver 1210, a processor 1200, a memory 1220, and a program or instructions stored in the memory 1220 and executable on the processor 1200; the processor 1200, when executing the program or the instructions, implements the above-described optical communication link state feedback method performed by the user equipment, or the above-described optical communication link state reception method performed by the base station.
The transceiver 1210 for receiving and transmitting data under the control of the processor 1200.
Where in fig. 12, the bus architecture may include any number of interconnected buses and bridges, with various circuits of one or more processors represented by processor 1200 and memory represented by memory 1220 being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The transceiver 1210 may be a number of elements including a transmitter and a receiver that provide a means for communicating with various other apparatus over a transmission medium. The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 may store data used by the processor 1200 in performing operations.
A readable storage medium according to an embodiment of the present invention stores a program or an instruction thereon, where the program or the instruction, when executed by a processor, implements the optical communication link state feedback method executed by the user equipment, or implements the steps in the optical communication link state receiving method executed by the base station, and can achieve the same technical effects, and the description is omitted here to avoid repetition.
Wherein, the processor is the processor in the communication device described in the above embodiment. The readable storage medium includes a computer readable storage medium, such as a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
It is further noted that the user devices described in this specification include, but are not limited to, smart phones, tablets, etc., and that many of the features described are referred to as modules in order to more particularly emphasize their implementation independence.
In embodiments of the present invention, modules may be implemented in software for execution by various types of processors. An identified module of executable code may, for instance, comprise one or more physical or logical blocks of computer instructions which may, for instance, be constructed as an object, procedure, or function. Nevertheless, the executables of an identified module need not be physically located together, but may comprise disparate instructions stored in different bits which, when joined logically together, comprise the module and achieve the stated purpose for the module.
Indeed, a module of executable code may be a single instruction, or many instructions, and may even be distributed over several different code segments, among different programs, and across several memory devices. Likewise, operational data may be identified within the modules and may be embodied in any suitable form and organized within any suitable type of data structure. The operational data may be collected as a single data set, or may be distributed over different locations including over different storage devices, and may exist, at least partially, merely as electronic signals on a system or network.
When a module can be implemented by software, considering the level of existing hardware technology, a module implemented by software may build a corresponding hardware circuit to implement a corresponding function, without considering cost, and the hardware circuit may include a conventional Very Large Scale Integration (VLSI) circuit or a gate array and an existing semiconductor such as a logic chip, a transistor, or other discrete components. A module may also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
The exemplary embodiments described above are described with reference to the drawings, and many different forms and embodiments of the invention may be made without departing from the spirit and teaching of the invention, therefore, the invention is not to be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the size and relative sizes of elements may be exaggerated for clarity. The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Unless otherwise indicated, a range of values, when stated, includes the upper and lower limits of the range and any subranges therebetween.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (18)

1. An optical communication link state feedback method, performed by a user equipment, comprising:
acquiring the signal intensity of a visible light communication signal under the condition of establishing a downlink data link of visible light communication with a server;
feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
2. The method of claim 1, wherein the feeding back the status information of the downlink to the base station according to the signal strength of the visible light communication signal comprises:
if the signal intensity of the visible light communication signal is greater than or equal to a first preset threshold value, feeding back information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
and if the signal intensity of the visible light communication signal is smaller than the first preset threshold and the continuous times N are larger than or equal to a second preset threshold, feeding back information of a second state, wherein the information of the second state is used for indicating that the downlink data link fails, and N is a positive integer.
3. The method of claim 2, further comprising:
and under the condition that the signal intensity of the visible light communication signal is smaller than the first preset threshold, if N is smaller than the second preset threshold, re-acquiring the signal intensity of the visible light communication signal, and updating the value of N to be N + 1.
4. The method of claim 1, wherein the status information comprises a visible light communication quality indication (LQI) or a visible light communication link indication (LRFI).
5. The method of claim 4, wherein the feeding back the status information of the downlink to the base station comprises:
and transmitting the LQI or the LRFI to the base station through a physical uplink channel, wherein the physical uplink channel is a Physical Uplink Control Channel (PUCCH) or a Physical Uplink Shared Channel (PUSCH).
6. The method of claim 5, wherein the transmitting the LQI or LRFI to the base station via a physical uplink channel comprises:
transmitting LQI or LRFI through a physical uplink channel based on the target period;
the target period includes at least one of:
a channel quality indication, CQI, period;
rank Indication (RI) period;
the precoding matrix indicates the PMI period;
a predefined or configured period.
7. An optical communication link state receiving method, performed by a base station, comprising:
receiving state information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
8. The method of claim 7, wherein the status information comprises LQI or LRFI.
9. The method of claim 8, wherein the receiving the status information of the downlink data link fed back by the user equipment comprises:
and receiving the LQI or the LRFI through a physical uplink channel, wherein the physical uplink channel is PUCCH or PUSCH.
10. The method of claim 9, wherein receiving the LQI or LRFI via a physical uplink channel comprises:
receiving LQI or LRFI through a physical uplink channel based on a target period;
the target period includes at least one of:
a CQI period;
RI period;
a PMI period;
a predefined or configured period.
11. The method of claim 7, wherein the status information comprises:
information of a first state, wherein the information of the first state is used for indicating that the downlink data link is normal;
information of a second state, the information of the second state being used to indicate that the downlink data link is failed.
12. The method of claim 11, further comprising:
and switching the downlink data link to a cellular network link when the received state information is the second state information.
13. An optical communication link state feedback apparatus, comprising:
the acquisition module is used for acquiring the signal intensity of the visible light communication signal under the condition of establishing a downlink data link of the visible light communication with the server;
a sending module, configured to feed back, to a base station, state information of the downlink data link according to the signal strength of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
14. An optical communication link status receiving apparatus, comprising:
a receiving module, configured to receive status information of a downlink data link fed back by a user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through a base station; the user equipment and the base station both support visible light communications and cellular network communications.
15. A user equipment comprising a processor and a transceiver;
the processor is used for acquiring the signal intensity of the visible light communication signal under the condition of establishing a downlink data link of the visible light communication with the server;
the transceiver is used for feeding back the state information of the downlink data link to a base station according to the signal intensity of the visible light communication signal;
the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
16. A base station, comprising a transceiver configured to:
receiving state information of a downlink data link fed back by user equipment;
the downlink data link is a downlink data link for establishing visible light communication between the user equipment and a server, and the user equipment and the server establish communication connection through the base station; the user equipment and the base station both support visible light communications and cellular network communications.
17. A communication device, comprising: a transceiver, a processor, a memory, and a program or instructions stored on the memory and executable on the processor; wherein the program or instructions when executed by the processor implement the optical communication link state feedback method according to any one of claims 1 to 6 or the optical communication link state receiving method according to any one of claims 7 to 12.
18. A readable storage medium on which a program or instructions are stored, wherein the program or instructions, when executed by a processor, implement the optical communication link state feedback method according to any one of claims 1 to 6, or the steps in the optical communication link state reception method according to any one of claims 7 to 12.
CN202110275793.8A 2021-03-15 2021-03-15 Optical communication link state feedback method, receiving method, device and equipment Pending CN115087063A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105577278A (en) * 2015-12-16 2016-05-11 中南民族大学 Multi-antenna dynamic cooperative communication system based on visible light, and method thereof
CN106549708A (en) * 2016-11-21 2017-03-29 南方科技大学 WLAN and terminal and its control method and device, wireless communication system
CN106576067A (en) * 2014-09-30 2017-04-19 华为技术有限公司 Data transmission method and apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106576067A (en) * 2014-09-30 2017-04-19 华为技术有限公司 Data transmission method and apparatus
CN105577278A (en) * 2015-12-16 2016-05-11 中南民族大学 Multi-antenna dynamic cooperative communication system based on visible light, and method thereof
CN106549708A (en) * 2016-11-21 2017-03-29 南方科技大学 WLAN and terminal and its control method and device, wireless communication system

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