Communication method, device, equipment, storage medium, program product and communication equipment

Abstract

Disclosed in an embodiment of the present invention are a communication method, apparatus and device, a storage medium, a program product and a communication device, the method comprising: receiving first information sent by a light source device, the first information comprising first parameter information and / or first channel information; the first parameter information at least comprises information of a first bandwidth corresponding to the light source equipment, and the first channel information is used for indicating channel quality of each sub-band in the first bandwidth; the first information is used for evaluating the channel quality of each sub-band in the first bandwidth.

Description

Technical Field

[0001] The present invention relates to the field of visible light communication technology, and in particular to a communication method, apparatus, device, storage medium, program product, and communication device. Background Art

[0002] Optical wireless communication (OWC) is a new type of wireless optical communication technology that uses light-emitting diodes (LEDs) or laser diodes (LDs) for communication. This technology includes visible light communication (VLC) and infrared communication. The transmitter in a wireless optical communication system typically consists of an LED / LD, which has high sensitivity and can transmit information using high-speed flashing signals that are indistinguishable to the human eye. To ensure both illumination and signal quality, OWC can use white LEDs or red, green, and blue LEDs as transmitters. A photodetector (PD) at the receiving end receives the corresponding optical signal and provides feedback in the form of current.

[0003] The performance of LEDs, LDs, and PDs determines the upper limit of VLC system performance. Limited by carrier lifetime, external quantum efficiency, and RC parasitics, LEDs have a modulation bandwidth of only a few megahertz (Hz). In contrast, LDs operate in stimulated emission mode, unaffected by carrier lifetime and thus possessing a much wider bandwidth. However, due to limitations in manufacturing processes and model design, both LEDs and LDs exhibit complex frequency response curves within their modulation bandwidth and may exhibit multiple frequency domain leakage points. This significantly impacts communication quality.

[0004] Because different manufacturers use different processes and materials, and the frequency response and spectral leakage of light sources vary, base stations can allocate different time-frequency resources to users based on channel measurements and feedback. However, since these frequency resources do not change over time and tend to fluctuate only slightly over short periods of time, frequent channel measurements across all frequency bands inevitably incur additional overhead. Therefore, preventing terminals from performing unnecessary measurements on unavailable frequency resources, reducing the amount of measurements required, and lowering energy consumption are pressing challenges. Summary of the Invention

[0005] To solve existing technical problems, embodiments of the present invention provide a communication method, apparatus, device, storage medium, program product, and communication device.

[0006] To achieve the above-mentioned purpose, the technical solution of the embodiment of the present invention is implemented as follows:

[0007] In a first aspect, an embodiment of the present invention provides a communication method, applied to an access network device; the method includes:

[0008] Receive first information sent by a light source device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information of a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-frequency band within the first bandwidth.

[0009] In the above scheme, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; signal-to-noise ratio information of each sub-band within the first bandwidth.

[0010] In the above scheme, the method also includes: sending a reference signal to the terminal in a first manner, or sending a reference signal to the terminal in a second manner; wherein the first manner uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second manner uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal.

[0011] In the above scheme, the sending of a reference signal to the terminal in the first manner includes: determining at least one sub-frequency band corresponding to the terminal, sending a reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band, and receiving second information sent by the terminal; the second information includes a first measurement result obtained by the terminal on the reference signal sent based on the time-frequency resources; adjusting the at least one sub-frequency band according to the first information and the second information, and re-sending the reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0012] In the above solution, the method further includes: determining a modulation and coding scheme (MCS) of the terminal on a second bandwidth based on the first information and the second information, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0013] In the above scheme, sending a reference signal to the terminal in accordance with the second method includes: determining at least one sub-frequency band corresponding to the terminal, adjusting the at least one sub-frequency band according to the first information, and sending a reference signal to the terminal based on the time-frequency resources on the adjusted at least one sub-frequency band.

[0014] In the above solution, the method further includes: receiving third information sent by the terminal, where the third information includes a second measurement result obtained by the terminal measuring a reference signal sent based on the adjusted time-frequency resources on at least one sub-band.

[0015] In the above solution, the method further includes: determining the MCS of the terminal on a second bandwidth based on the first information and the third information; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0016] In the above scheme, the adjusting of the at least one sub-frequency band includes: when the first sub-frequency band meets the first condition, removing the first sub-frequency band from the at least one sub-frequency band, or re-determining at least one sub-frequency band within the first bandwidth, and each sub-frequency band in the re-determined at least one sub-frequency band does not meet the first condition; wherein the first sub-frequency band is any sub-frequency band of the at least one sub-frequency band.

[0017] In the above solution, the method further includes: sending fourth information to the terminal, where the fourth information includes second channel information indicating the channel quality of each sub-frequency band within the second bandwidth.

[0018] In the above solution, before receiving the first information sent by the light source device, the method further includes: sending a first request to the light source device, where the first request is used to request the first information.

[0019] In the above solution, the sub-frequency bands used to send the reference signal in the at least one sub-frequency band are adjacent or non-adjacent.

[0020] In a second aspect, an embodiment of the present invention further provides a communication method, applied to a light source device; the method includes:

[0021] Sending first information to an access network device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information about a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-frequency band within the first bandwidth.

[0022] In the above scheme, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; signal-to-noise ratio information of each sub-band within the first bandwidth.

[0023] In the above solution, before sending the first information to the access network device, the method further includes: receiving a first request sent by the access network device, where the first request is used to request the first information.

[0024] In a third aspect, an embodiment of the present invention further provides a communication method, applied to a terminal; the method includes:

[0025] receiving a reference signal sent by an access network device in a first manner, or receiving a reference signal sent by the access network device in a second manner;

[0026] Among them, the first method uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second method uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by the light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information at least includes information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0027] In the above scheme, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; signal-to-noise ratio information of each sub-band within the first bandwidth.

[0028] In the above scheme, the receiving reference signal sent by the access network device in the first manner includes: receiving the reference signal sent by the access network device based on the time-frequency resources on at least one sub-frequency band, and measuring the reference signal to obtain a first measurement result; the at least one sub-frequency band is the sub-frequency band allocated by the access network device to the terminal; sending second information to the access network device, the second information including the first measurement result; the second information is used by the access network device to adjust the at least one sub-frequency band, and resend the reference signal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0029] In the above solution, the second information is also used by the access network device to determine the MCS of the terminal on a second bandwidth, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0030] In the above scheme, the receiving of the reference signal sent by the access network device in the second manner includes: receiving the reference signal sent by the access network device based on the time-frequency resources on at least one adjusted sub-frequency band, and the adjusted at least one sub-frequency band is obtained by the access network device according to the first information.

[0031] In the above scheme, the method also includes: measuring the reference signal sent based on the adjusted time-frequency resources on at least one sub-band to obtain a second measurement result, and sending third information to the access network device, wherein the third information includes the second measurement result.

[0032] In the above solution, the third information is used by the access network device to determine the MCS of the terminal on the second bandwidth; the second bandwidth is the bandwidth used for visible light communication within the first bandwidth.

[0033] In the above solution, the method further includes: sending fourth information to the access network device, where the fourth information includes second channel information indicating the channel quality of each sub-frequency band within the second bandwidth.

[0034] In the above solution, the method further includes: determining a second sub-frequency band in which the second channel information meets a second condition in the second bandwidth, and stopping detection of the second sub-frequency band within a preset time range.

[0035] In the above solution, the sub-frequency bands used to send the reference signal in the at least one sub-frequency band are adjacent or non-adjacent.

[0036] In fourth aspect, an embodiment of the present invention also provides a communication device, including a first communication unit, for receiving first information sent by a light source device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information of a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-frequency band within the first bandwidth.

[0037] In the fifth aspect, an embodiment of the present invention also provides a communication device, including a second communication unit, for sending first information to an access network device, wherein the first information includes first parameter information and / or first channel information; the first parameter information includes at least information of the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-frequency band within the first bandwidth.

[0038] In a sixth aspect, an embodiment of the present invention further provides a communication apparatus, comprising a third communication unit, configured to receive a reference signal sent by an access network device in a first manner, or to receive a reference signal sent by the access network device in a second manner;

[0039] Among them, the first method uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second method uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by the light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information at least includes information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0040] In a seventh aspect, an embodiment of the present invention further provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in the first, second or third aspect above.

[0041] In an eighth aspect, an embodiment of the present invention further provides a computer program product, comprising a computer program, which, when executed by a processor, implements the steps of the method described in the first aspect, the second aspect, or the third aspect.

[0042] In the ninth aspect, an embodiment of the present invention also provides a communication device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of the method described in the first, second, or third aspect are implemented.

[0043] The communication method, apparatus, equipment, storage medium, program product and communication equipment provided by the embodiments of the present invention enable the access network equipment to pre-evaluate the initial channel conditions within the available bandwidth of the light source equipment by obtaining the physical characteristic parameters of the light source equipment and / or the first channel information obtained after processing by the light source equipment, thereby helping the base station to perform operations such as digital pre-equalization or bit loading in advance, and also avoiding unnecessary measurements of unavailable frequency domain resources by the terminal, thereby reducing the amount of data measured by the terminal and the additional energy consumption overhead. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 Schematic diagram of the communication method according to an embodiment of the present invention Figure 1 ;

[0045] Figure 2 This is an example of adjusting at least one sub-frequency band according to an embodiment of the present invention. Figure 1 ;

[0046] Figure 3 This is an example of adjusting at least one sub-frequency band according to an embodiment of the present invention. Figure 2 ;

[0047] Figure 4 Schematic diagram of the communication method according to an embodiment of the present invention Figure 2 ;

[0048] Figure 5 Schematic diagram of the communication method according to an embodiment of the present invention Figure 3 ;

[0049] Figure 6 This is a diagram illustrating an application example of the communication method according to an embodiment of the present invention;

[0050] Figure 7 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 1 ;

[0051] Figure 8 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 2 ;

[0052] Figure 9 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 3 ;

[0053] Figure 10 2 is a schematic structural diagram of a communication device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0054] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the embodiments described are only a portion of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are intended to fall within the scope of protection of the present invention.

[0055] In the description of the present invention, it should be noted that the terms "first," "second," "third," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance. These terms are simply used to distinguish one element (or threshold value or application or instruction or operation) from another element (or threshold value or application or instruction or operation). For example, a first operation can be referred to as a second operation, and a second operation can be referred to as a first operation without departing from the scope of the present invention. The first operation and the second operation are both operations, but they are not the same operation.

[0056] The term "and / or" in the embodiments of the present invention refers to any and all possible combinations of one or more of the associated listed items. It should also be noted that when used in this specification, "include / comprise" specifies the presence of the stated features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements and / or components and / or groups thereof.

[0057] The steps in the embodiments of the present invention do not necessarily have to be processed in the order of the described steps. The steps can be selectively rearranged, or the steps in the embodiments can be deleted, or the steps in the embodiments can be added as needed. The step descriptions in the embodiments of the present invention are only optional sequence combinations and do not represent all step sequence combinations in the embodiments of the present invention. The order of the steps in the embodiments cannot be considered as a limitation of the present invention.

[0058] An embodiment of the present invention provides a communication method, which is applied to an access network device; Figure 1 Schematic diagram of the communication method according to an embodiment of the present invention Figure 1 ,like Figure 1 As shown, the method includes:

[0059] Step 101: Receive first information sent by a light source device, where the first information includes first parameter information and / or first channel information; the first parameter information includes at least information about a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-band within the first bandwidth.

[0060] This embodiment is applied to a visible light communication system. The access network device may be, for example, a unit, component, module, device or equipment for baseband processing in a visible light communication system, and may also be referred to as an access node (AP, Access Point), a base station, a network device, a baseband processing unit, etc.; the light source device may be, for example, a unit, component, module, device or equipment for sending visible light in a visible light communication system.

[0061] In this embodiment, the first bandwidth corresponding to the light source device is, for example, a device modulation bandwidth of the light source device, which can be obtained according to a frequency response curve of the light source device.

[0062] In step 101, the access network device receives first information sent by the light source device. The first information can be used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth corresponding to the light source device, and specifically may include first parameter information and / or first channel information. The first parameter information is information related to the first bandwidth of the light source device, such as the frequency response, reflection coefficient, frequency domain leakage, and modulation bandwidth of the light source device under different temperatures and operating voltages. The first channel information is information that can indicate the channel quality of each sub-band within the first bandwidth, such as the channel quality indicator (CAI) corresponding to each sub-band within the first bandwidth.

[0063] In some embodiments, the first channel information can be determined by the light source device based on the first parameter information, for example, it can be obtained based on the frequency response, reflection coefficient, frequency domain leakage, signal-to-noise ratio, channel quality indication and other information of each sub-band of the first bandwidth.

[0064] In some embodiments, the first information only includes the first parameter information, and the access network device may determine the first channel information closer to the first parameter information.

[0065] It can be understood that the light source device can report its own hardware parameter information to the access network device, that is, the first parameter information related to the first bandwidth, and / or, it can also determine the channel quality of each sub-frequency band within the first bandwidth based on its own hardware parameters, and then report the first channel quality to the access network device; after receiving the first parameter information and / or the first channel information, the access network device can evaluate the channel quality of each sub-frequency band within the first bandwidth, and then allocate a suitable sub-frequency band to the terminal according to the evaluation results.

[0066] In some embodiments, the access network device may perform step 101 during the initial access phase of the terminal or before the access network device communicates with the terminal.

[0067] According to the communication method of the embodiment of the present invention, the access network device can pre-evaluate the initial channel conditions within the available bandwidth of the light source device by obtaining the physical characteristic parameters of the light source device and / or the first channel information obtained after processing by the light source device, which helps the base station to perform operations such as digital pre-equalization or bit loading in advance, and can also avoid the terminal from performing unnecessary measurements on unavailable frequency domain resources, thereby reducing the amount of data measured by the terminal and the additional energy consumption overhead.

[0068] In some embodiments, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0069] As an example, the access network device receives first information sent by the light source device, where the first information includes the first parameter information. That is, the first information may include at least one of the following: frequency response information for each sub-band within the first bandwidth, reflection coefficient information for each sub-band within the first bandwidth, frequency domain leakage information for each sub-band within the first bandwidth, signal-to-noise ratio information for each sub-band within the first bandwidth, etc. It will be understood that in this embodiment, the light source device may report its own physical characteristic parameters to the access network device, so that the access network device can evaluate the channel quality of each sub-band within the first bandwidth of the light source device.

[0070] In an optional embodiment of the present invention, the method may further include: sending a reference signal to the terminal in a first manner, or sending a reference signal to the terminal in a second manner; wherein the first manner uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second manner uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal.

[0071] It can be understood that the access network device may directly allocate the time-frequency resources of the reference signal without referring to the first information, and adjust the time-frequency resources of the subsequently sent reference signal according to the first information after sending the reference signal to the terminal, and send the subsequent reference signal according to the adjusted time-frequency resources; or, the access network device may refer to the first information when sending the reference signal for the first time, that is, before sending the reference signal, adjust the time-frequency resources of the reference signal to be sent according to the first information, and send the reference signal according to the adjusted time-frequency resources.

[0072] In an optional embodiment of the present invention, the sending of a reference signal to a terminal in a first manner may include: determining at least one sub-frequency band corresponding to the terminal, sending a reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band, and receiving second information sent by the terminal; the second information includes a first measurement result obtained by the terminal of measuring the reference signal sent based on the time-frequency resources; adjusting the at least one sub-frequency band according to the first information and the second information, and re-sending the reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0073] In this embodiment, the access network device directly allocates at least one sub-frequency band to the terminal without referring to the first information, and sends a reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band, thereby obtaining a first measurement result obtained by the terminal performing reference signal measurement on the at least one sub-frequency band; further, the at least one previously allocated sub-frequency band is adjusted according to the first information and the first measurement result, and the reference signal is re-sent to the terminal based on the time-frequency resources on the at least one adjusted sub-frequency band.

[0074] As an optional implementation manner, the adjusting of the at least one sub-frequency band according to the first information and the second information may include: when it is determined that the first sub-frequency band meets the first condition according to the first information and the second information, removing the first sub-frequency band from the at least one sub-frequency band, or redetermining at least one sub-frequency band within the first bandwidth, wherein each sub-frequency band in the redetermined at least one sub-frequency band does not meet the first condition; wherein the first sub-frequency band is any sub-frequency band in the at least one sub-frequency band. In this embodiment, the first condition can be used to determine a sub-frequency band whose channel quality does not meet communication requirements, for example, the channel quality corresponding to the sub-frequency band is lower than a set threshold, or the channel quality corresponding to the sub-frequency band is within a set range, etc.

[0075] In this embodiment, when the access network device determines, based on the first information and the second information, that the sub-frequency band allocated to the terminal does not meet the communication requirements, the access network device does not use the sub-frequency band to allocate time-frequency resources for sending a reference signal to the terminal, and does not add a new sub-frequency band to the terminal; alternatively, after eliminating the sub-frequency band that does not meet the communication requirements, the access network device may allocate a new sub-frequency band to the terminal, and the number or position of the new sub-frequency band may be different from the previously allocated sub-frequency band, and the new sub-frequency band meets the communication requirements.

[0076] In some embodiments, the method may further include determining an MCS for the terminal on a second bandwidth based on the first information and the second information, where the second bandwidth is a bandwidth within the first bandwidth used for visible light communication. In this embodiment, after receiving the second information sent by the terminal, the access network device may determine the MCS of the terminal on the second bandwidth currently available for visible light communication based on the first information and the second information, which may be used to control the data format of subsequent communications with the terminal.

[0077] In an optional embodiment of the present invention, sending a reference signal to the terminal in a second manner may include: determining at least one sub-frequency band corresponding to the terminal, adjusting the at least one sub-frequency band according to the first information, and sending a reference signal to the terminal based on the time-frequency resources on the adjusted at least one sub-frequency band.

[0078] In this embodiment, the access network device refers to the first information to allocate time-frequency resources for sending a reference signal to the terminal. It can be understood that the access network device refers to the first information before sending the reference signal to the terminal to adjust the time-frequency resources corresponding to the reference signal to be sent.

[0079] As an optional implementation, the adjusting of the at least one sub-frequency band according to the first information may include: when the access network device determines that the first sub-frequency band meets the first condition according to the first information, removing the first sub-frequency band from the at least one sub-frequency band, or redetermining at least one sub-frequency band within the first bandwidth, and each sub-frequency band in the redetermined at least one sub-frequency band does not meet the first condition; wherein the first sub-frequency band is any sub-frequency band in the at least one sub-frequency band. In this embodiment, the first condition can be used to determine a sub-frequency band whose channel quality does not meet communication requirements, for example, the channel quality corresponding to the sub-frequency band is lower than a set threshold, or the channel quality corresponding to the sub-frequency band is within a set range, etc.

[0080] In this embodiment, when the access network device determines, based on the first information, that the sub-frequency band allocated to the terminal does not meet the communication requirements, the access network device does not use the sub-frequency band to allocate time-frequency resources for sending a reference signal to the terminal, and does not add a new sub-frequency band to the terminal; alternatively, after eliminating the sub-frequency band that does not meet the communication requirements, the access network device may allocate a new sub-frequency band to the terminal, and the number or position of the new sub-frequency band may be different from the number or position of the previously allocated sub-frequency band, and the new sub-frequency band meets the communication requirements.

[0081] In this embodiment, the access network device may allocate reference signal time-frequency resources to the terminal with reference to the first parameter information and / or first channel information reported by the light source device. When the first parameter information and / or first channel information indicate that the channel quality of the corresponding sub-band is poor, it may not be allocated to any terminal, thereby ensuring the communication quality.

[0082] In an optional embodiment of the present invention, the sub-bands used for sending reference signals in the at least one sub-band are adjacent or non-adjacent. Exemplarily, the access network device may allocate at least one sub-band to the terminal in a block manner, i.e., the at least one sub-band is a group of sub-bands that are adjacent in the time domain and / or frequency domain; or, the access network device may allocate at least one sub-band to the terminal in a grid manner, i.e., the at least one sub-band is a group of sub-bands that are discrete in the time domain and / or frequency domain.

[0083] Figure 2 This is an example of adjusting at least one sub-frequency band according to an embodiment of the present invention. Figure 1 , Figure 2 A square in the grid can represent one or more resource blocks (RBs), where the horizontal axis represents time and the vertical axis represents frequency. Figure 2 As shown, after receiving the first information sent by the light source device, the access network device can determine the channel quality of each sub-band, referring to Figure 2 In part (a), the shaded portion represents the sub-frequency band with poor channel quality (i.e., meeting the first condition); taking the access network device using the first method to send the reference signal as an example, the access network device does not refer to the first information and directly allocates the corresponding sub-frequency band to each terminal. Figure 2 In part (b), the sub-band allocated to UE1 is Figure 2 The sub-bands shown in the first three rows of part (b) are the sub-bands assigned to UE2 as shown in rows 4 to 6, and the sub-bands assigned to UE3 as shown in rows 8 to 10. The corresponding reference signals are sent accordingly. At this time, after each terminal performs reference signal measurement, it will be found that Figure 2 The channel quality of the sub-frequency band indicated by the shaded portion in part (a) is poor, and this condition is fed back to the access network device through the first measurement result of the terminal; after receiving the first measurement result, the access network device may adjust at least one sub-frequency band corresponding to each terminal according to the first measurement result and the first information, such as Figure 2 As shown in part (c), for UE1 and UE3, the allocated sub-bands (e.g., the number of RBs) can be reduced, and for UE2, a new sub-band can be reallocated. Figure 2 Part (c) adjusts the RB position of the sub-band of UE2.

[0084] Figure 3 This is an example of adjusting at least one sub-frequency band according to an embodiment of the present invention. Figure 2 ,and Figure 2 The difference is, Figure 2 The sub-bands allocated by the access network equipment to each terminal are adjacent sub-bands in the time domain and / or frequency domain. Figure 3 The sub-bands allocated by the access network equipment to each terminal are non-adjacent (or discrete) sub-bands in the time domain and / or frequency domain, such as Figure 3 As shown in part (a).

[0085] After receiving the first information sent by the light source device, the access network device may directly allocate the corresponding sub-band to each terminal and send the corresponding reference signal without referring to the first information, such as Figure 3 (a) As shown in part; after the terminal performs reference signal measurement on the corresponding sub-band, it can be found that the channel quality of some sub-bands is poor. At this time, the access network device can determine based on the first information and the measurement result sent by the terminal Figure 3 The channel quality of the sub-bands shown in rows 4 and 5 and rows 11 and 12 in part (b) is poor, and the sub-bands allocated to each terminal can be readjusted accordingly.

[0086] In addition, the access network device may also use a second method to send a reference signal, that is, after receiving the first information sent by the light source device, it may refer to the first information to allocate a corresponding sub-band to each terminal, such as Figure 3 As shown in part (c), for UE1 and UE3, the allocated sub-bands (e.g., the number of RBs) can be reduced, and for UE2, a new sub-band can be reallocated. Figure 3 Part (c) adjusts the RB position and RB number of the sub-band of UE2.

[0087] In an optional embodiment of the present invention, the method may further include: receiving third information sent by the terminal, the third information including a second measurement result obtained by the terminal measuring a reference signal sent based on time-frequency resources on at least one adjusted sub-band.

[0088] In some embodiments, the method may further include: determining an MCS for the terminal on a second bandwidth based on the first information and the third information; the second bandwidth being a bandwidth used for visible light communication within the first bandwidth. In this embodiment, when transmitting a reference signal using the second method, the access network device may determine the MCS for the terminal on the second bandwidth used for visible light communication based on the first information and a reference signal measurement result of the terminal on at least one adjusted sub-band (i.e., the second measurement result), and may control the data format communicated with the terminal.

[0089] In an optional embodiment of the present invention, the method may further include: sending fourth information to the terminal, the fourth information including second channel information indicating the channel quality of each sub-frequency band within the second bandwidth. In this embodiment, the access network device may further send second channel information indicating the channel quality of each sub-frequency band within the second bandwidth to the terminal, where the second bandwidth is a bandwidth within the first bandwidth that can be used for visible light communication.

[0090] In some embodiments, the second channel information may be, for example, a channel quality indicator for each sub-band within the second bandwidth. The second channel information may be determined based on the first channel information, or the second channel information may be determined based on the first parameter information. It is understood that when the light source device reports the first channel information, the second channel information is the first channel information within the second bandwidth; when the light source device reports the first parameter information, the second channel information is determined by the access network device based on the first parameter information.

[0091] In an optional embodiment of the present invention, before receiving the first information sent by the light source device, the method may further include: sending a first request to the light source device, wherein the first request is used to request the first information. In this embodiment, the access network device may also request the light source device to send the first information.

[0092] In some embodiments, the access network device sends the first request to the light source device based on a preset period, and the preset period can be set to a longer period.

[0093] An embodiment of the present invention further provides a communication method, which is applied to a light source device; Figure 4 Schematic diagram of the communication method according to an embodiment of the present invention Figure 2 ,like Figure 4 As shown, the method includes:

[0094] Step 201: Send first information to the access network device, where the first information includes first parameter information and / or first channel information; the first parameter information includes at least information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0095] The detailed description of step 201 in this embodiment can refer to the relevant description of step 101 in the above embodiment, and will not be repeated here to save space.

[0096] In an optional embodiment of the present invention, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0097] In an optional embodiment of the present invention, before sending the first information to the access network device, the method may further include: receiving a first request sent by the access network device, where the first request is used to request the first information.

[0098] The embodiment of the present invention further provides a communication method, which is applied to a terminal; Figure 5 Schematic diagram of the communication method according to an embodiment of the present invention Figure 3 ,like Figure 5 As shown, the method includes:

[0099] Step 301: Receive a reference signal sent by an access network device in a first manner, or receive a reference signal sent by the access network device in a second manner; wherein the first manner uses first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second manner uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by a light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information includes at least information on the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0100] In this embodiment, the terminal can receive a reference signal sent by the access network device using the first method or the second method, that is, the access network device directly allocates time-frequency resources for sending the reference signal to the terminal without referring to the first information sent by the light source device, and uses the first information to adjust the allocated time-frequency resources after sending the reference signal; or the access network device refers to the first information sent by the light source device to adjust the time-frequency resources allocated to the terminal for sending the reference signal, and sends the reference signal to the terminal based on the adjusted time-frequency resources.

[0101] In the communication method of this embodiment, the access network device can allocate reference signal resources based on the first parameter information and / or first channel information fed back by the light source device, thereby avoiding unnecessary measurements of frequency domain resources that are unavailable in visible light communication by the terminal, reducing the measurement amount of the terminal, and reducing system energy consumption.

[0102] In an optional embodiment of the present invention, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0103] In an optional embodiment of the present invention, the receiving of the reference signal sent by the access network device in a first manner may include: receiving the reference signal sent by the access network device based on the time-frequency resources on at least one sub-frequency band, and measuring the reference signal to obtain a first measurement result; the at least one sub-frequency band is a sub-frequency band allocated by the access network device to the terminal; sending second information to the access network device, the second information including the first measurement result; the second information is used by the access network device to adjust the at least one sub-frequency band, and resend the reference signal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0104] In an optional embodiment of the present invention, the second information is also used by the access network device to determine the MCS of the terminal on a second bandwidth, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0105] In an optional embodiment of the present invention, the receiving of the reference signal sent by the access network device in the second manner may include: receiving the reference signal sent by the access network device based on the time-frequency resources on at least one adjusted sub-frequency band, and the adjusted at least one sub-frequency band is obtained by the access network device according to the first information.

[0106] In an optional embodiment of the present invention, the method may further include: measuring a reference signal sent based on the adjusted time-frequency resources on at least one sub-band to obtain a second measurement result, and sending a third message to the access network device, wherein the third message includes the second measurement result.

[0107] In an optional embodiment of the present invention, the third information is used by the access network device to determine the MCS of the terminal on a second bandwidth; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0108] In an optional embodiment of the present invention, the method may further include: sending fourth information to the access network device, where the fourth information includes second channel information indicating the channel quality of each sub-band within the second bandwidth.

[0109] In an optional embodiment of the present invention, the method may further include: determining a second sub-frequency band in which the second channel information satisfies a second condition in the second bandwidth, and stopping detection of the second sub-frequency band within a preset time range.

[0110] In this embodiment, the second condition may be used to determine a sub-frequency band whose channel quality does not meet communication requirements, and may include, for example, the channel quality of the sub-frequency band being lower than a set threshold, or the channel quality of the sub-frequency band being within or outside a preset range. After receiving the second channel information indicating the channel quality of each sub-frequency band within the second bandwidth sent by the access network device, the terminal may determine a second sub-frequency band within the second bandwidth having poor channel quality, and customize detection of the second sub-frequency band within a period of time.

[0111] In an optional embodiment of the present invention, the sub-frequency bands used for sending reference signals in the at least one sub-frequency band are adjacent or non-adjacent.

[0112] The communication solution of the embodiment of the present invention is described in detail below with reference to specific application scenarios.

[0113] Figure 6 FIG. 1 is an example diagram of an application of the communication method according to an embodiment of the present invention. Figure 6 The AP (Access Point) is the aforementioned access network device, the light source is the aforementioned light source device, and the UE is the aforementioned terminal. Figure 6 As shown, this example includes the following processes:

[0114] Step 401: Light source parameter acquisition request. Exemplarily, the AP may send a parameter acquisition request to the light source, and the request sending period may be set to a longer period.

[0115] Step 402: Parameter reporting. In this example, the light source reports light source parameter information (i.e., first parameter information) and / or first channel information to the AP. The light source parameter information includes, but is not limited to, the device modulation bandwidth under different temperatures and operating voltages, the frequency response of each RB within the device modulation bandwidth, the reflection coefficient, the frequency domain leakage, the signal-to-noise ratio, and the like. The first channel information can reflect the channel conditions of each RB within the device modulation bandwidth of the light source and can indicate the channel quality of each RB.

[0116] Exemplarily, the method for obtaining the first channel information includes but is not limited to: obtaining from the frequency response within the RB; obtaining from the reflection coefficient within the RB; obtaining from the frequency domain leakage within the RB; obtaining from the signal-to-noise ratio (SNR, Signal to Noise Ratio) within the RB; obtaining from the channel quality indicator (Channel Quality Indicator, CQI) within the RB; and obtaining from a combination of the above information.

[0117] Step 403: User resource allocation. In this example, the AP can complete the reference signal resource allocation for each UE based on the measurement results and send the reference signal. The AP can determine the reference signal time-frequency resource configuration for each RB based on the first channel information. The reference signal time-frequency resource method includes:

[0118] (1) Directly allocate reference signal time-frequency resources without referring to the first channel information of the measurement result;

[0119] (2) Adjust the allocation of reference signal time-frequency resources based on the first channel information of the measurement results. For example, if the first channel information of an RB is poor, it will not be allocated to any user. Specifically:

[0120] a. When the first channel information performance of an RB allocated to a user is poor, the RB is not used to transmit the reference signal, but a new RB is not added to transmit the reference signal.

[0121] b. When the first channel information performance of the RB allocated to a certain user is poor, a new RB is allocated to the user. The number and position of the RBs can be changed.

[0122] It should be noted that time-frequency resources can be allocated in a block or grid manner, refer to Figure 2 and Figure 3 As shown, specifically, when a block approach is adopted, a reference signal needs to be configured for each RB in the frequency domain, and no reference signal is configured for a short period of time in the time domain. When a grid approach is adopted, a reference signal is configured for every X positions in the frequency domain. At positions where the first channel information is good, X can be set large, and at positions where the first channel information is poor, X can be set small.

[0123] Step 404: The AP sends a reference signal to the terminal. In this example, the AP may use the time-frequency resources allocated by the method shown in step 403 (1) (i.e., the first method) to send the reference signal, or may use the time-frequency resources allocated by the method shown in step 403 (2) (i.e., the second method) to send the reference signal.

[0124] Step 405: CQI calculation.

[0125] Step 406: Report measurement results: The UE measures the reference signal and reports the channel measurement results.

[0126] In this example, when the UE's reference signal is transmitted using the time-frequency resources allocated in the manner shown in step (1) of step 403, the AP can determine the MCS on the UE's currently available RBs based on the first channel information and the reference signal measurement results reported by the terminal. In this case, the AP can determine which RBs are truly unable to transmit data, which is equivalent to calibrating the first channel information using the terminal's reference signal measurement results. In addition, the AP can also adjust the RBs allocated to the UE, such as reducing the RB resources allocated to the UE. Or, the AP can allocate new RBs to the UE and retransmit the reference signal.

[0127] When the UE's reference signal is sent using the time-frequency resources allocated in the manner shown in step (2) of step 403, the AP may determine the MCS on the UE's currently available RBs based on the first channel information and the reference signal measurement result reported by the terminal.

[0128] Step 407: The AP sends pre-channel information (ie, second channel information) to the terminal. For example, the AP may adjust reference signal resource allocation according to the reported reference signal measurement result and send the pre-channel information.

[0129] In this example, the channel pre-information may include first channel information of each RB within the AP's available bandwidth.

[0130] Step 408: The terminal performs calculation adjustment. For example, the UE may stop detecting RBs with poor first channel information (eg, when the first channel information is lower than a set threshold) for a period of time based on the channel pre-information.

[0131] This example takes into account that manufacturers can pre-measure a batch of light sources in advance. Information such as the device frequency response, reflection coefficient, and frequency domain leakage can be encapsulated inside the device and notified to the base station (AP) in advance, which helps the base station perform digital pre-equalization or bit loading operations in advance. At the same time, the base station can pre-evaluate the initial channel conditions within the available bandwidth based on the obtained physical characteristic parameters of the light source, calculate the signal transmission conditions of each RB, and then transmit a reference signal. The UE demodulates the reference signal and reports the channel conditions. The base station can readjust the user resource allocation strategy based on the measurement results and inform the UE of pre-information such as device information or available bandwidth, avoiding unnecessary measurements of unavailable frequency domain resources by the terminal, reducing the terminal measurement volume, and lowering system energy consumption.

[0132] An embodiment of the present invention further provides a communication device. Figure 7 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 1 ,like Figure 7 As shown, the communication device 50 includes a first communication unit 51, which is used to receive first information sent by the light source device, wherein the first information includes first parameter information and / or first channel information; the first parameter information at least includes information of the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-frequency band within the first bandwidth.

[0133] In an optional embodiment of the present invention, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0134] In an optional embodiment of the present invention, the first communication unit 51 is further used to send a reference signal to the terminal in a first manner, or is further used to send a reference signal to the terminal in a second manner; wherein the first manner uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second manner uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal.

[0135] In an optional embodiment of the present invention, the device also includes a first processing unit, which is used to determine at least one sub-frequency band corresponding to the terminal; the first communication unit 51 is used to send a reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band, and receive second information sent by the terminal; the second information includes a first measurement result obtained by the terminal on the reference signal sent based on the time-frequency resources; the first processing unit is also used to adjust the at least one sub-frequency band according to the first information and the second information; the first communication unit 51 is also used to re-send the reference signal to the terminal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0136] In an optional embodiment of the present invention, the first processing unit is further used to determine the MCS of the terminal on a second bandwidth based on the first information and the second information, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0137] In an optional embodiment of the present invention, the device also includes a first processing unit, which is used to determine at least one sub-frequency band corresponding to the terminal and adjust the at least one sub-frequency band according to the first information; the first communication unit 51 is also used to send a reference signal to the terminal based on the time-frequency resources on the adjusted at least one sub-frequency band.

[0138] In an optional embodiment of the present invention, the first communication unit 51 is further used to receive third information sent by the terminal, and the third information includes a second measurement result obtained by the terminal based on the reference signal sent based on the adjusted time-frequency resources on at least one sub-band.

[0139] In an optional embodiment of the present invention, the first processing unit is further used to determine the MCS of the terminal on a second bandwidth based on the first information and the third information; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0140] In an optional embodiment of the present invention, the first processing unit is further configured to, when the first sub-frequency band satisfies a first condition, remove the first sub-frequency band from the at least one sub-frequency band, or redetermine at least one sub-frequency band within the first bandwidth, wherein each sub-frequency band in the redetermined at least one sub-frequency band does not satisfy the first condition; wherein the first sub-frequency band is any sub-frequency band in the at least one sub-frequency band.

[0141] In an optional embodiment of the present invention, the first communication unit 51 is further configured to send fourth information to the terminal, where the fourth information includes second channel information indicating the channel quality of each sub-frequency band within the second bandwidth.

[0142] In an optional embodiment of the present invention, the first communication unit 51 is further configured to send a first request to the light source device, where the first request is used to request the first information.

[0143] In an optional embodiment of the present invention, the sub-frequency bands used for sending reference signals in the at least one sub-frequency band are adjacent or non-adjacent.

[0144] In an embodiment of the present invention, the first processing unit in the communication device 50 can be implemented in actual applications by a central processing unit (CPU), a digital signal processor (DSP), a microcontroller unit (MCU) or a programmable gate array (FPGA) in the access network device; the first communication unit 51 in the communication device 50 can be implemented in actual applications by a communication module (including: a basic communication kit, an operating system, a communication module, a standardized interface and protocol, etc.) and a transceiver antenna.

[0145] An embodiment of the present invention further provides a communication device. Figure 8 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 2 ,like Figure 8 As shown, the communication device 60 includes a second communication unit 61, which is used to send first information to the access network device, where the first information includes first parameter information and / or first channel information; the first parameter information includes at least information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0146] In an optional embodiment of the present invention, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0147] In an optional embodiment of the present invention, the second communication unit 61 is further configured to receive a first request sent by the access network device, where the first request is used to request the first information.

[0148] In the embodiment of the present invention, the second communication unit 61 in the communication device 60 can be implemented in actual applications through a communication module (including: basic communication kit, operating system, communication module, standardized interface and protocol, etc.) and a transceiver antenna.

[0149] An embodiment of the present invention further provides a communication device. Figure 9 Schematic diagram of the structure of the communication device according to an embodiment of the present invention Figure 3 ,like Figure 9 As shown, the communication device 70 includes a third communication unit 71, which is used to receive a reference signal sent by an access network device in a first manner, or to receive a reference signal sent by the access network device in a second manner; wherein the first manner uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second manner uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by the light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information includes at least information on the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

[0150] In an optional embodiment of the present invention, the information of the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-band within the first bandwidth; and signal-to-noise ratio information of each sub-band within the first bandwidth.

[0151] In an optional embodiment of the present invention, the third communication unit 71 is used to receive the reference signal sent by the access network device based on the time-frequency resources on at least one sub-frequency band; the device also includes a second processing unit, used to measure the reference signal to obtain a first measurement result; the at least one sub-frequency band is a sub-frequency band allocated by the access network device to the terminal; the third communication unit 71 is also used to send second information to the access network device, the second information including the first measurement result; the second information is used by the access network device to adjust the at least one sub-frequency band, and to resend the reference signal based on the time-frequency resources on the at least one sub-frequency band after adjustment.

[0152] In an optional embodiment of the present invention, the second information is also used by the access network device to determine the MCS of the terminal on a second bandwidth, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0153] In an optional embodiment of the present invention, the third communication unit 71 is further used to receive the reference signal sent by the access network device based on the time-frequency resources on at least one adjusted sub-frequency band, and the adjusted at least one sub-frequency band is obtained by the access network device according to the first information.

[0154] In an optional embodiment of the present invention, the second processing unit is further used to measure the reference signal sent based on the adjusted time-frequency resources on at least one sub-frequency band to obtain a second measurement result; the third communication unit 71 is further used to send third information to the access network device, and the third information includes the second measurement result.

[0155] In an optional embodiment of the present invention, the third information is used by the access network device to determine the MCS of the terminal on a second bandwidth; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

[0156] In an optional embodiment of the present invention, the third communication unit 71 is further configured to send fourth information to the access network device, where the fourth information includes second channel information indicating the channel quality of each sub-band within the second bandwidth.

[0157] In an optional embodiment of the present invention, the apparatus further includes a second processing unit, configured to determine a second sub-frequency band in which the second channel information satisfies a second condition in the second bandwidth, and stop detecting the second sub-frequency band within a preset time range.

[0158] In an optional embodiment of the present invention, the sub-frequency bands used for sending reference signals in the at least one sub-frequency band are adjacent or non-adjacent.

[0159] In an embodiment of the present invention, the second processing unit in the communication device 70 can be implemented by the CPU, DSP, MCU or FPGA in the terminal in actual applications; the third communication unit in the communication device 70 can be implemented by a communication module (including: basic communication kit, operating system, communication module, standardized interface and protocol, etc.) and a transceiver antenna in actual applications.

[0160] It should be noted that the communication device provided in the above embodiments is illustrated only by the division of the above-mentioned program modules when performing communication. In actual applications, the above-mentioned processing can be assigned to different program modules as needed, that is, the internal structure of the device can be divided into different program modules to complete all or part of the above-described processing. In addition, the communication device and the communication method embodiment provided in the above embodiments are based on the same concept. The specific implementation process is detailed in the method embodiment and will not be repeated here.

[0161] An embodiment of the present invention also provides a communication device. Figure 10 8 is a schematic structural diagram of a communication device according to an embodiment of the present invention. For example, the communication device 800 may be a terminal, an access network device or a light source device according to the aforementioned embodiment. Figure 10 The communication device 800 shown includes: at least one processor 801, a memory 802 and at least one network interface 803. The various components in the communication device 800 are coupled together via a bus system 804. It is understood that the bus system 804 is used to achieve connection and communication between these components. In addition to including a data bus, the bus system 804 also includes a power bus, a control bus and a status signal bus. However, for the sake of clarity, the bus system 804 is not described in detail. Figure 10 Various buses are labeled as bus system 804 .

[0162] It is understood that memory 802 can be volatile memory or non-volatile memory, or can include both volatile and non-volatile memory. Non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), ferromagnetic random access memory (FRAM), flash memory, magnetic surface memory, optical disk, or compact disc read-only memory (CD-ROM); magnetic surface memory can be magnetic disk memory or tape memory. Volatile memory can be random access memory (RAM), which is used as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), synchronous static random access memory (SSRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDRSDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct rambus random access memory (DRRAM).The memory 802 described in the embodiments of the present invention is intended to include, but is not limited to, these and any other suitable types of memory.

[0163] The memory 802 in the embodiment of the present invention is used to store various types of data to support the operation of the communication device 800. Examples of such data include any computer program for operating on the communication device 800, such as the program of the communication method in the embodiment of the present invention.

[0164] The methods disclosed in the above embodiments of the present invention can be applied to or implemented by processor 801. Processor 801 may be an integrated circuit chip with signal processing capabilities. During implementation, each step of the above method can be completed by hardware integrated logic circuits in processor 801 or by software instructions. Processor 801 may be a general-purpose processor, a DSP, or other programmable logic device, a discrete gate or transistor logic device, or a discrete hardware component. Processor 801 can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. A general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of the present invention can be directly implemented and executed by a hardware decoding processor, or by a combination of hardware and software modules in the decoding processor. The software modules may be located in a storage medium located in memory 802. Processor 801 reads information from memory 802 and, in conjunction with its hardware, completes the steps of the above method.

[0165] In an exemplary embodiment, the communication device 800 may be implemented by one or more application-specific integrated circuits (ASICs), DSPs, programmable logic devices (PLDs), complex programmable logic devices (CPLDs), FPGAs, general-purpose processors, controllers, MCUs, microprocessors, or other electronic components to perform the aforementioned method.

[0166] In an exemplary embodiment, the present invention further provides a computer-readable storage medium, such as a memory 802 including a computer program. The computer program can be executed by the processor 801 of the communication device 800 to perform the steps of the aforementioned method. The computer-readable storage medium can be a memory such as FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface mount storage, optical disk, or CD-ROM; or various devices including any one or any combination of the aforementioned memories, such as a mobile phone, computer, tablet device, personal digital assistant, etc.

[0167] In an exemplary embodiment, the present invention further provides a computer program product, including a computer program. The computer program can be executed by the processor 801 of the communication device 800 to complete the steps of any of the above methods.

[0168] The methods disclosed in the several method embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments.

[0169] The features disclosed in the several product embodiments provided in this application can be arbitrarily combined without conflict to obtain new product embodiments.

[0170] The features disclosed in the several method or device embodiments provided in this application can be arbitrarily combined without conflict to obtain new method embodiments or device embodiments.

[0171] In the several embodiments provided in this application, it should be understood that the disclosed devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is merely a logical function division. In actual implementation, there may be other division methods, such as: multiple units or components can be combined, or can be integrated into another system, or some features can be ignored or not executed. In addition, the coupling, direct coupling, or communication connection between the components shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0172] The units described above as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units; some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0173] In addition, all functional units in the embodiments of the present invention may be integrated into one processing unit, or each unit may be separately used as a unit, or two or more units may be integrated into one unit; the above-mentioned integrated units may be implemented in the form of hardware or in the form of hardware plus software functional units.

[0174] Those skilled in the art will appreciate that all or part of the steps of the above-mentioned method embodiments may be implemented by hardware associated with program instructions, and the aforementioned program may be stored in a computer-readable storage medium. When the program is executed, the program executes the steps of the above-mentioned method embodiments. The aforementioned storage medium includes various media that can store program codes, such as mobile storage devices, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.

[0175] Alternatively, if the above-mentioned integrated unit of the present invention is implemented in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the embodiment of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the methods described in each embodiment of the present invention. The aforementioned storage medium includes: various media that can store program codes, such as mobile storage devices, ROM, RAM, magnetic disks or optical disks.

[0176] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A communication method, characterized in that: Applied to access network equipment; the method includes: Receive first information sent by a light source device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information of a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-frequency band within the first bandwidth.

2. The method according to claim 1, characterized in that The information about the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-frequency band within the first bandwidth; Signal-to-noise ratio information of each sub-band within the first bandwidth.

3. The method according to claim 1 or 2, characterized in that The method further comprises: Sending a reference signal to the terminal in a first manner, or sending a reference signal to the terminal in a second manner; The first method uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second method uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal.

4. The method according to claim 3, characterized in that The sending a reference signal to the terminal in the first manner includes: determining at least one sub-frequency band corresponding to the terminal, sending a reference signal to the terminal based on a time-frequency resource on the at least one sub-frequency band, and receiving second information sent by the terminal, wherein the second information includes a first measurement result obtained by the terminal measuring the reference signal sent based on the time-frequency resource; The at least one sub-frequency band is adjusted according to the first information and the second information, and a reference signal is resent to the terminal based on the time-frequency resources on the adjusted at least one sub-frequency band.

5. The method according to claim 4, characterized in that The method further comprises: A modulation and coding scheme (MCS) of the terminal on a second bandwidth is determined according to the first information and the second information, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

6. The method according to claim 3, characterized in that The sending a reference signal to the terminal in the second manner includes: Determine at least one sub-frequency band corresponding to the terminal, adjust the at least one sub-frequency band according to the first information, and send a reference signal to the terminal based on time-frequency resources on the adjusted at least one sub-frequency band.

7. The method according to claim 6, characterized in that The method further comprises: Third information sent by the terminal is received, where the third information includes a second measurement result obtained by the terminal measuring a reference signal sent based on the adjusted time-frequency resources on at least one sub-frequency band.

8. The method according to claim 7, characterized in that The method further comprises: The MCS of the terminal on a second bandwidth is determined according to the first information and the third information; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

9. The method according to claim 4 or 6, characterized in that The adjusting the at least one sub-frequency band includes: If the first sub-frequency band satisfies the first condition, the first sub-frequency band is removed from the at least one sub-frequency band, or at least one sub-frequency band is re-determined within the first bandwidth, and each sub-frequency band in the re-determined at least one sub-frequency band does not satisfy the first condition; wherein the first sub-frequency band is any sub-frequency band in the at least one sub-frequency band.

10. The method according to claim 5 or 8, characterized in that The method further comprises: Fourth information is sent to the terminal, where the fourth information includes second channel information indicating channel quality of each sub-frequency band within the second bandwidth.

11. The method according to claim 1 or 2, characterized in that Before receiving the first information sent by the light source device, the method further includes: A first request is sent to the light source device, where the first request is used to request the first information.

12. The method according to any one of claims 4 to 8, characterized in that The sub-frequency bands used for sending the reference signal in the at least one sub-frequency band are adjacent or non-adjacent.

13. A communication method, characterized in that: Applied to a light source device; the method comprises: Sending first information to an access network device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information about a first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-frequency band within the first bandwidth.

14. The method according to claim 13, characterized in that The information about the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-frequency band within the first bandwidth; Signal-to-noise ratio information of each sub-band within the first bandwidth.

15. The method according to claim 13 or 14, characterized in that Before sending the first information to the access network device, the method further includes: A first request sent by the access network device is received, where the first request is used to request the first information.

16. A communication method, characterized in that: Applied to a terminal; the method includes: receiving a reference signal sent by an access network device in a first manner, or receiving a reference signal sent by the access network device in a second manner; Among them, the first method uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second method uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by the light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information at least includes information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

17. The method according to claim 16, characterized in that The information about the first bandwidth includes at least one of the following: frequency response information of each sub-band within the first bandwidth; reflection coefficient information of each sub-band within the first bandwidth; frequency domain leakage information of each sub-frequency band within the first bandwidth; Signal-to-noise ratio information of each sub-band within the first bandwidth.

18. The method according to claim 16, characterized in that The receiving a reference signal sent by the access network device in the first manner includes: Receiving a reference signal sent by the access network device based on time-frequency resources on at least one sub-frequency band, and measuring the reference signal to obtain a first measurement result; the at least one sub-frequency band is a sub-frequency band allocated by the access network device to the terminal; Sending second information to the access network device, where the second information includes the first measurement result; the second information is used by the access network device to adjust the at least one sub-frequency band and resend the reference signal based on the time-frequency resources on the adjusted at least one sub-frequency band.

19. The method according to claim 18, characterized in that The second information is also used by the access network device to determine the MCS of the terminal on a second bandwidth, where the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

20. The method according to claim 16, wherein The receiving a reference signal sent by the access network device in the second manner includes: The reference signal sent by the access network device is received based on the adjusted time-frequency resources on at least one sub-frequency band, where the adjusted at least one sub-frequency band is obtained by the access network device according to the first information.

21. The method according to claim 20, characterized in that The method further comprises: Measure the reference signal sent based on the adjusted time-frequency resources on at least one sub-frequency band to obtain a second measurement result, and send third information to the access network device, where the third information includes the second measurement result.

22. The method according to claim 21, characterized in that The third information is used by the access network device to determine the MCS of the terminal on a second bandwidth; the second bandwidth is a bandwidth used for visible light communication within the first bandwidth.

23. The method according to claim 19 or 22, characterized in that The method further comprises: Fourth information is sent to the access network device, where the fourth information includes second channel information indicating channel quality of each sub-frequency band within the second bandwidth.

24. The method according to claim 23, wherein The method further comprises: Determine a second sub-frequency band in which the second channel information satisfies a second condition in the second bandwidth, and stop detecting the second sub-frequency band within a preset time range.

25. The method according to any one of claims 18 to 22, characterized in that The sub-frequency bands used for sending the reference signal in the at least one sub-frequency band are adjacent or non-adjacent.

26. A communication device, characterized in that: The device includes a first communication unit for receiving first information sent by a light source device, the first information including first parameter information and / or first channel information; the first parameter information includes at least information of a first bandwidth corresponding to the light source device, the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used to evaluate the channel quality of each sub-frequency band within the first bandwidth.

27. A communication device, characterized in that: The device includes a second communication unit, which is used to send first information to the access network device, where the first information includes first parameter information and / or first channel information; the first parameter information includes at least information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-frequency band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-frequency band within the first bandwidth.

28. A communication device, characterized in that: The apparatus includes a third communication unit, configured to receive a reference signal sent by an access network device in a first manner, or receive a reference signal sent by the access network device in a second manner; Among them, the first method uses the first information to adjust the time-frequency resources of the reference signal after sending the reference signal, and the second method uses the first information to adjust the time-frequency resources of the reference signal before sending the reference signal; the first information is information sent by the light source device to the access network device, and the first information includes first parameter information and / or first channel information; the first parameter information at least includes information about the first bandwidth corresponding to the light source device, and the first channel information is used to indicate the channel quality of each sub-band within the first bandwidth; the first information is used by the access network device to evaluate the channel quality of each sub-band within the first bandwidth.

29. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, it implements the steps of the method described in any one of claims 1 to 12; or, when the program is executed by a processor, it implements the steps of the method described in any one of claims 13 to 15; or, when the program is executed by a processor, it implements the steps of the method described in any one of claims 16 to 25.

30. A computer program product comprising a computer program, characterized in that The computer program, when executed by a processor, implements the steps of the method described in any one of claims 1 to 12; or, the computer program, when executed by a processor, implements the steps of the method described in any one of claims 13 to 15; or, the computer program, when executed by a processor, implements the steps of the method described in any one of claims 16 to 25.

31. A communication device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the program, the steps of the method described in any one of claims 1 to 12 are implemented; or, when the processor executes the program, the steps of the method described in any one of claims 13 to 15 are implemented; or, when the processor executes the program, the steps of the method described in any one of claims 16 to 25 are implemented.

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