Link management method, device, apparatus and readable storage medium

Abstract

Embodiments of the present application provide a link management method, device and equipment, and a readable storage medium. The method comprises: reporting first information to a first access network device, the first information indicating one or more of: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein the second downlink comprises a link between a terminal and a second access network device; the first access network device can provide radio frequency access to the terminal, and the second access network device can provide visible light access to the terminal; and obtaining a downlink selected by the first access network device for the terminal according to the first information, the downlink comprising a first downlink or a second downlink, and the first downlink comprising a link between the terminal and the first access network device.

Description

Technical Field

[0001] This application relates to the field of communication technology, specifically to a link management method, apparatus, device, and readable storage medium. Background Technology

[0002] Indoor Visible Light Communication (VLC) utilizes the high-speed flashing of light-emitting diodes (LEDs) to transmit information, using free space as the transmission channel. It is a high-speed and environmentally friendly new indoor access network technology. However, because the light emitted by LEDs has a certain directionality, its coverage area is relatively small. Service will be interrupted when users move to areas not covered by visible light communication. Furthermore, compared to the penetration of wireless communication, VLC is easily affected by obstructions, causing communication link interruptions. In related technologies, when the visible light communication link quality is poor, Fast Link Recovery (FLR) can be used to attempt to restore the link. For details, please refer to [link to related technology]. Figure 1 and Figure 2 .

[0003] The fast link recovery process can be initiated by the coordinator or by the visible light device.

[0004] (1) The coordinator and the terminal establish a connection;

[0005] (2) Send data to the communication peer;

[0006] (3) Receive feedback from the communication peer;

[0007] (4) If no acknowledgment (ACK) is received for macNumAcks consecutive times, the communication end stops sending data;

[0008] When the communication peer is a terminal device, the coordinator still needs to send an uplink grant (UL grant);

[0009] (5) Send multiple FLR signals to the communication peer in succession;

[0010] (6) Receive the FLR response (RSP) signal sent by the communication peer;

[0011] When the communication peer is a terminal device, initiating the FLR procedure is mandatory; and the terminal will only resume communication after receiving a response after sending the FLR RSP.

[0012] When the communication peer is the coordinator, the FLR process is only initiated when the coordinator sends data to the terminal; and if the FLR RSP is not received within the macLinkTimeOut timer, the association will be disassociated.

[0013] When visible light communication supports multiple channel transmission, assuming the coordinator supports channel M1 and the terminal device supports channel M2, and K is a shared channel between the two, step (5) requires sending multiple FLR signals in channel K, and step (6) detects FLR RSP on at least one channel in channel K and selects a new channel for communication.

[0014] Figure 3 The diagram illustrates the fast link recovery process for multi-channel visible light communication. Considering the susceptibility of visible light communication to interruptions, VLC is combined with other wireless access methods for heterogeneous networking. Currently, there are several solutions for heterogeneous networking of visible light and RF, such as... Figure 4 As shown.

[0015] Each coordinator (e.g., a Visible Light Communication Access Point (VLC AP)) is connected to the global controller (e.g., a Radio Frequency Access Point (RF AP)) via a backhaul link. Each coordinator provides visible light communication access to LiPAN devices (terminals), while the RF AP located on the global controller provides RF access to the terminals. The backhaul link can be a wired link or a wireless link. Wired links can be power line communication links, Ethernet links, or fiber optic links, while wireless links can be wireless LAN links, cellular links, etc. Considering the difficulty of implementing visible light uplink in practical applications, in heterogeneous visible light communication networks, it is assumed that visible light only has downlink and no uplink, while both uplink and downlink exist on the RF link.

[0016] Currently, how to send data to the terminal through a suitable downlink in visible light heterogeneous networking is an urgent problem to be solved. Summary of the Invention

[0017] This application provides a link management method, apparatus, device, and readable storage medium to solve the problem of how the network side selects a suitable downlink to send data to the terminal.

[0018] Firstly, a link management method is provided, applied to a terminal, including:

[0019] The system reports first information to the first access network device, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; the second downlink includes: a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0020] The downlink selected by the first access network device for the terminal based on the first information is obtained. The downlink includes a first downlink or a second downlink, and the first downlink includes a link between the terminal and the first access network device.

[0021] Optionally, the step of reporting the first information to the first access network device includes:

[0022] The first information is reported to the first access network device via the radio frequency uplink.

[0023] Optionally, the second downlink channel quality indicator includes WQI.

[0024] Optionally, the method further includes:

[0025] The terminal receives a second message sent by the first access network device, the second message instructing the terminal to stop receiving the second downlink channel data and the first FLR configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal set of channels to carry the FLR.

[0026] Report third information to the first access network device, the third information indicating an FLR response;

[0027] The terminal receives fourth information sent by the first access network device, wherein the fourth information indicates that the downlink selected by the terminal is the second downlink.

[0028] Optionally, the step of obtaining the downlink selected by the first access network device for the terminal includes:

[0029] The terminal receives first radio resource control reconfiguration information sent by the first access network device, wherein the first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0030] The fifth information is reported to the first access network device, and the fifth information indicates that the first radio resource control reconfiguration is completed.

[0031] Optionally, the method further includes:

[0032] The system receives a sixth message sent by the first access network device, the sixth message indicating a second FLR configuration and / or a first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication that the FLR stops transmitting / receiving; the first VLM configuration includes one or more of the following: an indication of VLM reception, a VLM periodic configuration, and an optimal set of channels carrying the VLM.

[0033] The seventh information is reported to the first access network device, the seventh information indicating the channel quality of the second downlink;

[0034] The terminal receives second radio resource control reconfiguration information sent by the first access network device, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink.

[0035] The first access network device reports the eighth information, which indicates the completion of the second radio resource control reconfiguration;

[0036] The system receives a ninth message sent by the first access network device, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM should stop receiving.

[0037] Secondly, a link management method is provided, applied to a first access network device, including:

[0038] The receiving terminal reports first information, which indicates one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0039] Based on the first information, the downlink selected for the terminal is determined. The downlink includes a first downlink or a second downlink. The first downlink includes a link between the terminal and the first access network device.

[0040] Instruct the downlink to the terminal and / or the second wireless access device.

[0041] Optionally, the step of determining the downlink for the terminal based on the first information includes:

[0042] Based on the first information and the first decision condition, the downlink selected for the terminal is determined.

[0043] Optionally, the first judgment condition includes one or more of the following:

[0044] The first consecutive number of ACKs was not received;

[0045] Received a second consecutive number of NACKs or DTXs;

[0046] No ACK or NACK is received within the first preset time;

[0047] The quality of the second downlink channel is lower than the first threshold.

[0048] Optionally, the step of instructing the terminal on the downlink includes:

[0049] Send a second message to the terminal, the second message instructing the terminal to stop receiving the second downlink channel data and the first fast link recovery (FLR) configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal set of channels to carry the FLR;

[0050] Receive third information from the terminal, the third information indicating an FLR response;

[0051] A fourth message is sent to the terminal and the second wireless access network device, the fourth message indicating that the downlink selected by the terminal is the second downlink.

[0052] Optionally, the method further includes:

[0053] Send a tenth message to the second radio access network device, the tenth message instructing the second radio access network device to stop sending data and the first FLR configuration.

[0054] Optionally, the step of instructing the terminal on the downlink includes:

[0055] Start the timer or set the maximum number of consecutive transfers for FLR;

[0056] If the first access network device does not receive an FLR response after the timer expires or after exceeding the maximum number of consecutive FLR transmissions, it sends a first radio resource control reconfiguration information to the terminal. The first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0057] The terminal receives a fifth message indicating that the first radio resource control reconfiguration is complete.

[0058] Optionally, the step of instructing the terminal on the downlink includes:

[0059] A sixth message is sent to the terminal, the sixth message indicating a second FLR configuration and a first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication that FLR stops receiving; the first VLM configuration includes one or more of the following: an indication of VLM reception, a VLM periodic configuration, and an optimal set of channels carrying the VLM.

[0060] The terminal receives seventh information, which indicates the channel quality of the second downlink.

[0061] Send a second radio resource control reconfiguration information to the terminal, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink;

[0062] The terminal receives an eighth message, which indicates that the second radio resource control reconfiguration is complete.

[0063] A ninth message is sent to the terminal, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM has stopped receiving.

[0064] Optionally, the method further includes:

[0065] The thirteenth message is sent to the second radio access network device, the thirteenth message indicating the second FLR configuration and / or the first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication to stop FLR transmission; the first VLM configuration includes one or more of the following: an indication to transmit VLM, a VLM periodic configuration, and an optimal set of channels to carry the VLM.

[0066] Optionally, the method further includes:

[0067] Send an eleventh message to the second radio access network device, the eleventh message instructing the second radio access network device to perform downlink data transmission through the second downlink;

[0068] A twelfth message is sent to the terminal and the second wireless access network device, the twelfth message indicating a second VLM configuration, the second VLM configuration including an indication that the VLM stops transmitting.

[0069] Thirdly, a link management method is provided, applied to a second access network device, including:

[0070] Receive a first FLR configuration from a first access network device. The first FLR configuration includes one or more of the following: an indication of FLR transmission, an FLR period configuration, and an optimal set of channels to carry the FLR.

[0071] Based on the first FLR configuration, an FLR signal is sent to the terminal on the optimal channel set;

[0072] or,

[0073] Receive a second FLR configuration and / or a first VLM configuration from the first access network; the second FLR configuration includes an indication to stop FLR transmission; the first VLM configuration includes one or more of the following: an indication to transmit VLM, a VLM periodic configuration, and an optimal set of channels to carry the VLM.

[0074] VLM signals are sent to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration.

[0075] Optionally, after sending an FLR signal to the terminal on the optimal channel set according to the first FLR configuration, the method further includes:

[0076] The terminal receives fourth information from the first wireless access network device, the fourth information indicating that the downlink selected by the terminal is the second downlink.

[0077] Data is sent to the terminal based on the fourth piece of information.

[0078] Optionally, after transmitting a VLM signal to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration, the method further includes:

[0079] The first wireless access network device receives eleventh information, which instructs the second wireless access network device to perform downlink data transmission through the second downlink;

[0080] Data is sent to the terminal according to the eleventh piece of information;

[0081] The first wireless access network device receives a twelfth message, which indicates a second VLM configuration, including an indication that the VLM should stop transmitting.

[0082] Fourthly, a link management device is provided for use in a terminal, comprising:

[0083] A first transmitting module is configured to report first information to a first access network device, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes: a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0084] The first acquisition module is used to acquire the downlink selected by the first access network device for the terminal. The downlink includes a first downlink or a second downlink, and the first downlink includes a link between the terminal and the first access network device.

[0085] Fifthly, a link management device is provided, applied to a first access network device, comprising:

[0086] A first receiving module is configured to receive first information reported by a terminal, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes: a link between the terminal and a second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0087] The determining module is configured to determine the downlink selected for the terminal based on the first information, wherein the downlink includes a first downlink or a second downlink, and the first downlink includes a link between the terminal and the first access network device;

[0088] The second transmitting module is used to indicate the downlink to the terminal and / or the second wireless access device.

[0089] Sixthly, a link management device is provided, applied to a second access network device, comprising:

[0090] The second receiving module is configured to receive a first FLR configuration from the first access network device, the first FLR configuration including one or more of the following: an indication of FLR transmission / reception, an FLR period configuration, and an optimal set of channels carrying the FLR; or, to receive a second FLR configuration and / or a first VLM configuration from the first access network; the second FLR configuration includes an indication of FLR stop transmission / reception; the first VLM configuration includes one or more of the following: an indication of VLM transmission, a VLM period configuration, and an optimal set of channels carrying the VLM;

[0091] The sixth transmitting module is configured to transmit an FLR signal to the terminal on the optimal channel set according to the first FLR configuration; or, to transmit a VLM signal to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration.

[0092] A seventh aspect provides a terminal comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, performs the steps of the method as described in the first aspect.

[0093] Eighthly, a network-side device is provided, comprising: a processor, a memory, and a program stored in the memory and executable on the processor, wherein the program, when executed by the processor, implements the steps of the method as described in the second or third aspect.

[0094] A ninth aspect provides a readable storage medium storing a program that, when executed by a processor, implements the steps of the method as described in the first, second, or third aspect.

[0095] In this embodiment, the terminal can feed back first information to the first access network device. The terminal can obtain the first downlink or the second downlink selected by the first access network device for the terminal. The first downlink includes the link between the terminal and the first access network device, and the second downlink includes the link between the terminal and the second access network device, thereby improving the reliability of the downlink. Attached Figure Description

[0096] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0097] Figure 1 It is a fast link recovery process for visible light communication initiated by the coordinator;

[0098] Figure 2 It is a visible light communication fast link recovery process initiated by visible light devices;

[0099] Figure 3 It is a fast link recovery process for visible light communication with multi-channel transmission;

[0100] Figure 4 It is a heterogeneous network of VCL and RF;

[0101] Figure 5 It is a fast link recovery process in VLC heterogeneous networks;

[0102] Figure 6 This is a block diagram of a wireless communication system provided in an embodiment of this application;

[0103] Figure 7 This is one of the flowcharts of the channel control method for heterogeneous visible light communication networks provided in the embodiments of this application;

[0104] Figure 8 This is the second flowchart of the link management method provided in the embodiments of this application;

[0105] Figure 9a and Figure 9b This is the third flowchart of the link management method provided in the embodiments of this application;

[0106] Figure 10 This is the fourth flowchart of the link management method provided in the embodiments of this application;

[0107] Figure 11 This is the fifth flowchart of the link management method provided in the embodiments of this application;

[0108] Figure 12 This is the sixth flowchart of the link management method provided in the embodiments of this application;

[0109] Figure 13 This is one of the schematic diagrams of the link management device provided in the embodiments of this application;

[0110] Figure 14 This is a second schematic diagram of the link management device provided in the embodiments of this application;

[0111] Figure 15 This is the third schematic diagram of the link management device provided in the embodiments of this application;

[0112] Figure 16 This is a schematic diagram of the network-side device provided in an embodiment of this application;

[0113] Figure 17 This is a schematic diagram of the terminal provided in the embodiments of this application. Detailed Implementation

[0114] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0115] The term "comprising," and any variations thereof, used in the specification and claims of this application, is intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those explicitly listed, but may include other steps or units not explicitly listed or inherent to such process, method, product, or apparatus. Furthermore, the use of "and / or" in the specification and claims indicates at least one of the connected objects, such as A and / or B, indicating the inclusion of A alone, B alone, or both A and B.

[0116] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0117] It is worth noting that the technologies described in this application are not limited to Long Term Evolution (LTE) / LTE-Advanced (LTE-A) systems, but can also be used in other wireless communication systems, such as Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Frequency Division Multiple Access (FDMA), Orthogonal Frequency Division Multiple Access (OFDMA), Single-carrier Frequency-Division Multiple Access (SC-FDMA), and other systems. The terms "system" and "network" in this application are often used interchangeably, and the described technologies can be used with the systems and radio technologies mentioned above, as well as with other systems and radio technologies. However, the following description describes New Radio (NR) systems for illustrative purposes, and the term NR is used in most of the following description, although these technologies can also be applied to applications other than NR systems, such as 6th Generation (6G) communication systems.

[0118] In the visible light fast link recovery process, the FLR signal is transmitted downlink via VLC, and the uplink FLR RSP signal is transmitted via the RF link, as follows: Figure 5 As shown.

[0119] In the fast link recovery process in a VLC heterogeneous network, the RF AP forwards ACK / Negative Acknowledgment (NACK) information to the VLC AP. If the VLC AP does not receive M consecutive ACKs, it stops transmitting data and sends multiple FLR signals in the K-shared channel. The RF AP detects FLRSP on at least one channel in the K-channel and notifies the VLC AP. The VLC AP then selects a channel to continue communication with the terminal. The K-shared channel can be used by the VLC AP and the terminal to report capabilities to the RF AP, which then obtains the K-shared channel and notifies the VLC AP; alternatively, the terminal can report capabilities to the RF AP, which then forwards them to the VLC AP, allowing the VLC AP to obtain the K-shared channel and notify the RF AP.

[0120] After creative work, the inventor discovered the following problems in the existing technology:

[0121] (1) The VLC AP needs to send multiple FLR signals in the K shared channel. The terminal blindly detects FLR on the supported M2 channels (K is a subset of M2). However, due to link interference and other issues, the channels that the terminal can actually detect FLR signals are only a subset of the K channels. Blindly detecting on all M2 channels will cause a large power consumption problem.

[0122] (2) When the visible light downlink is interrupted due to being outside the coverage area or being blocked, even if FLR is tried multiple times, the link may not be able to be restored. How to select the downlink to send data to the terminal?

[0123] (3) If the VLC downlink interruption problem is solved by transmitting data via RF downlink, when will the terminal switch back to the VLC downlink?

[0124] See Figure 6 This diagram illustrates a block diagram of a wireless communication system applicable to embodiments of this application. The wireless communication system includes a terminal 61, network-side devices 62 and 63. The terminal 61 can also be referred to as a terminal device or user equipment (UE). Terminal 61 can be a mobile phone, tablet computer, laptop computer, personal digital assistant (PDA), handheld computer, netbook, ultra-mobile personal computer (UMPC), mobile internet device (MID), wearable device, vehicle user equipment (VUE), pedestrian user equipment (PUE), etc. Wearable devices include wristbands, headphones, glasses, etc. It should be noted that the specific type of terminal 61 is not limited in this embodiment.

[0125] Network-side device 62 and network-side device 63 can be base stations or core networks. The base station can be referred to as Node B, Evolved Node B, Access Point, Base Transceiver Station (BTS), Radio Base Station, Radio Transceiver, Basic Service Set (BSS), Extended Service Set (ESS), B Node, Evolved B Node (eNB), Home B Node, Home Evolved B Node, WLAN Access Point, WiFi Node, TRP, or any other suitable term in the field, as long as the same technical effect is achieved. The base station is not limited to specific technical terms. It should be noted that in this embodiment of the application, only the base station in the NR system is used as an example, but the specific type of base station is not limited.

[0126] See Figure 7 This application provides a link management method, which can be executed by a terminal. The specific steps include: step 701 and step 702.

[0127] Step 701: Report first information to the first access network device, the first information indicating one or more of the following: second downlink channel quality, Hybrid Automatic Repeat Request (HARQ) feedback information for the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0128] Step 702: Obtain the downlink selected by the first access network device for the terminal based on the first information. The downlink includes a first downlink or a second downlink. The first downlink includes the link between the terminal and the first access network device.

[0129] Optionally, the first wireless access network device can be an RF AP, and the second wireless access network device can be a VLC AP, but it is not limited to these.

[0130] In one embodiment of this application, the step of reporting the first information to the first access network device includes: reporting the first information to the first access network device via a radio frequency uplink.

[0131] In one embodiment of this application, the second downlink channel quality indicator includes a wavelength quality indicator (WQI).

[0132] In one embodiment of this application, the method further includes:

[0133] The terminal receives a second message sent by the first access network device, the second message instructing the terminal to stop receiving the second downlink channel data and the first fast link recovery (FLR) configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal set of channels carrying the FLR.

[0134] Report third information to the first access network device, the third information indicating an FLR response;

[0135] The terminal receives fourth information sent by the first access network device, wherein the fourth information indicates that the downlink selected by the terminal is the second downlink.

[0136] In one embodiment of this application, the method further includes:

[0137] The terminal receives first radio resource control reconfiguration information sent by the first access network device, wherein the first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0138] The fifth information is reported to the first access network device, and the fifth information indicates that the first radio resource control reconfiguration is completed.

[0139] In one embodiment of this application, the method further includes:

[0140] The system receives a sixth message sent by the first access network device, the sixth message indicating a second FLR configuration and / or a first visible-light link monitor (VLM) configuration; the second FLR configuration includes: an indication that the FLR stops receiving; the first VLM configuration includes one or more of the following: an indication that the VLM receives, a VLM periodic configuration, and an optimal set of channels carrying the VLM.

[0141] The seventh information is reported to the first access network device, the seventh information indicating the channel quality of the second downlink;

[0142] The terminal receives second radio resource control reconfiguration information sent by the first access network device, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink.

[0143] The first access network device reports the eighth information, which indicates that the second radio resource control reconfiguration is complete;

[0144] The system receives a ninth message sent by the first access network device, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM should stop receiving.

[0145] When the quality of the second downlink deteriorates, VLC is prioritized, and the terminal power consumption can be reduced through the optimized FLR process. When the quality of the second downlink is extremely poor, switching to the first downlink can improve the link reliability of the entire heterogeneous network. When the quality of the second downlink improves, VLC is prioritized, and switching back to the second downlink can improve system capacity.

[0146] See Figure 8 This application provides a link management method. The execution subject of the method can be a first access network device, such as an RF AP. The specific steps include: step 801, step 802 and step 803.

[0147] Step 801: Receive first information reported by the terminal, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes: a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0148] Step 802: Based on the first information, determine the downlink selected for the terminal. The downlink includes a first downlink or a second downlink. The first downlink includes a link between the terminal and the first access network device.

[0149] Step 803: Instruct the downlink to the terminal and / or the second wireless access device.

[0150] In one embodiment of this application, the step of determining the downlink selection for the terminal based on the first information includes:

[0151] Based on the first information and the first decision condition, the downlink selected for the terminal is determined.

[0152] In one embodiment of this application, the first judgment condition includes one or more of the following:

[0153] (1) The first consecutive number of ACKs were not received;

[0154] (2) Receive a second consecutive number of NACKs or Discontinuous Transmissions (DTX);

[0155] (3) No ACK or NACK is received within the first preset time;

[0156] (4) The quality of the second downlink channel is lower than the first threshold.

[0157] Understandably, if the first judgment condition is met, the downlink selected for the terminal is determined based on the first information.

[0158] In one embodiment of this application, the step of instructing the downlink to the terminal includes:

[0159] Send a second message to the terminal, the second message instructing the terminal to stop receiving the second downlink channel data and the first fast link recovery (FLR) configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal set of channels to carry the FLR;

[0160] Receive third information from the terminal, the third information indicating an FLR response;

[0161] A fourth message is sent to the terminal and the second wireless access network device, the fourth message indicating that the downlink selected by the terminal is the second downlink.

[0162] In one embodiment of this application, the method further includes:

[0163] Send a tenth message to the second radio access network device, the tenth message instructing the second radio access network device to stop sending data and the first FLR configuration.

[0164] In one embodiment of this application, the step of instructing the downlink to the terminal includes:

[0165] Start the timer or set the maximum number of consecutive transfers for FLR;

[0166] If the first access network device does not receive an FLR response after the timer expires or after exceeding the maximum number of consecutive FLR transmissions, it sends a first radio resource control reconfiguration information to the terminal. The first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0167] The terminal receives a fifth message, which indicates that the first radio resource control reconfiguration is complete.

[0168] In one embodiment of this application, the step of instructing the downlink to the terminal includes:

[0169] A sixth message is sent to the terminal, the sixth message indicating a second FLR configuration and a first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication that FLR stops receiving; the first VLM configuration includes one or more of the following: an indication of VLM reception, a VLM periodic configuration, and an optimal set of channels carrying the VLM.

[0170] The terminal receives seventh information, which indicates the channel quality of the second downlink.

[0171] Send a second radio resource control reconfiguration information to the terminal, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink;

[0172] The terminal receives an eighth message, which indicates that the second radio resource control reconfiguration is complete.

[0173] A ninth message is sent to the terminal, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM has stopped receiving.

[0174] In one embodiment of this application, the method further includes:

[0175] The thirteenth message is sent to the second radio access network device, the thirteenth message indicating the second FLR configuration and / or the first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication to stop FLR transmission; the first VLM configuration includes one or more of the following: an indication to transmit VLM, a VLM periodic configuration, and an optimal set of channels to carry the VLM.

[0176] In one embodiment of this application, after receiving the eighth information from the terminal, the method further includes:

[0177] Send an eleventh message to the second radio access network device, the eleventh message instructing the second radio access network device to perform downlink data transmission through the second downlink;

[0178] A twelfth message is sent to the terminal and the second wireless access network device, the twelfth message indicating a second VLM configuration, the second VLM configuration including an indication that the VLM stops transmitting.

[0179] In the embodiments of this application, when the quality of the second downlink deteriorates, VLC is prioritized, and the terminal power consumption can be reduced through the optimized FLR process; when the quality of the second downlink is extremely poor, switching to the first downlink can improve the link reliability of the entire heterogeneous network; when the quality of the second downlink improves, VLC is prioritized and the system can switch back to the second downlink, thereby increasing the system capacity.

[0180] See Figure 9a and Figure 9b This application provides a link management method. The subject of the method can be a second access network device, such as a VLC AP. The specific steps include steps 901a and 902a, or steps 901b and 902b.

[0181] Step 901a: Receive a first FLR configuration from the first access network device, the first FLR configuration including one or more of the following: an indication of FLR transmission, an FLR period configuration, and an optimal set of channels to carry the FLR;

[0182] Step 902a: Based on the first FLR configuration, send an FLR signal to the terminal on the optimal channel set;

[0183] Step 901b: Receive a second FLR configuration and / or a first VLM configuration from the first access network; the second FLR configuration includes an indication to stop FLR transmission; the first VLM configuration includes one or more of the following: an indication to transmit VLM, a VLM periodic configuration, and an optimal set of channels to carry the VLM.

[0184] Step 902b: Send a VLM signal to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration.

[0185] In one embodiment of this application, after transmitting an FLR signal to a terminal on the optimal channel set according to the first FLR configuration, the method further includes:

[0186] The terminal receives fourth information from the first wireless access network device, the fourth information indicating that the downlink selected by the terminal is the second downlink.

[0187] Data is sent to the terminal based on the fourth piece of information.

[0188] In one embodiment of this application, after transmitting a VLM signal to a terminal on a shared channel set according to the second FLR configuration and / or the first VLM configuration, the method further includes:

[0189] The device receives eleventh information from the first wireless access network device, the eleventh information instructing the second wireless access network device to perform downlink data transmission through the second downlink; and sends data to the terminal according to the eleventh information.

[0190] The first wireless access network device receives a twelfth message, which indicates a second VLM configuration, including an indication that the VLM should stop transmitting.

[0191] In the embodiments of this application, when the quality of the second downlink deteriorates, VLC is prioritized, and the terminal power consumption can be reduced through the optimized FLR process; when the quality of the second downlink is extremely poor, switching to the first downlink can improve the link reliability of the entire heterogeneous network; when the quality of the second downlink improves, VLC is prioritized and the system can switch back to the second downlink, thereby increasing the system capacity.

[0192] See Figure 10 The diagram illustrates the process of an RF AP controlling a VLC AP for fast link recovery. The specific steps are as follows:

[0193] Step 1: The VLC AP and the terminal establish a connection and send data on channel A;

[0194] Step 2: The terminal sends signaling to the RF AP via RF uplink;

[0195] Optionally, the signaling can be feedback information, including: ACK, NACK, or DTX.

[0196] Optionally, the signaling can be a Wavelength Quality Indicator (WQI), which represents the channel quality of VLC downlink.

[0197] Optionally, the signaling can be a visible light link failure signaling; if the terminal receives multiple incorrect signals consecutively, it will indicate that the link has failed.

[0198] Optionally, signaling can be carried on the Physical Uplink Control Channel (PUCCH), Medium Access Control (MAC), or Radio Resource Control (RRC), etc.

[0199] Step 3: The RF AP determines whether the FLR triggering conditions are met. If they are met, it notifies the VLC AP to stop sending data, notifies the terminal to stop receiving VLC downlink data, and continues to send UL grants. At the same time, it notifies the VLC AP and the terminal of the first FLR configuration.

[0200] Optionally, the triggering conditions include one or more of the following: (1) no consecutive ACKs are received; (2) multiple consecutive NACKs or DTXs are received; (3) no ACKs or NACKs are received within a predetermined time T; (4) WQI is lower than a threshold value; (5) a VLF signal is received.

[0201] Optionally, the first FLR configuration includes one or more of the following: (1) an indication of FLR transmission / reception; (2) FLR periodic configuration; (3) the optimal set of channels for carrying the FLR; wherein the optimal set of channels can be obtained by the RF AP during the channel selection process;

[0202] Optionally, the FLR configuration is carried on UL grant, MAC, or RRC, etc.

[0203] Step 4: The VLC AP continuously sends multiple FLR signals on the optimal channel set. The measurement is FLR energy detection, with a short measurement period and short reporting delay.

[0204] Step 5: The terminal blindly detects FLR on the optimal channel set and detects FLR on at least one channel (assuming it is channel B and channel C). It then feeds back the FLR RSP signal via RF uplink.

[0205] Step 6: The RF AP receives the FLR RSP on channels B and C. Based on principles such as load balancing and interference coordination, it selects a channel (let's say channel C) to notify the VLC AP and the terminal. The VLC AP continues to communicate with the terminal on channel C.

[0206] See Figure 11 and Figure 12 The diagram illustrates the process of an RF AP controlling a VLC AP to perform slow link recovery. The specific steps are as follows:

[0207] Step 1: The RF AP determines whether the FLR triggering conditions are met. If they are met, the timer is started and the maximum number of consecutive FLR transmissions is set.

[0208] Step 2: If the RF AP does not receive the FLR RSP after the timer expires or after the maximum number of transmissions has been exceeded, it sends the first RRC reconfiguration information to the terminal via RF downlink. The first RRC reconfiguration information instructs the terminal to resume RF downlink data reception and stop VLC downlink data reception.

[0209] Step 3: The RF AP receives the first RRC reconfiguration completion information sent by the terminal, sends data through RF downlink, and at the same time notifies the VLC AP and the terminal of the first visible light link monitoring (VLM) configuration and the second FLR configuration according to the principles of load balancing and minimum power consumption.

[0210] Optionally, the first VLM configuration includes a visible light link monitoring configuration, and the VLM configuration includes one or more of the following: (1) VLM transmission / reception indication; (2) VLM periodic configuration; (3) a set of channels carrying the VLM.

[0211] The second FLR configuration instructs the FLR to stop sending / receiving.

[0212] Step 4: The VLC AP sends a VLM signal on the K shared channel set. The measurement is signal quality detection. The measurement is accurate and has a long measurement period, thus ensuring the continuity of data transmission during handover and avoiding the ping-pong effect.

[0213] Step 5: The terminal performs blind detection of VLM on the K-channel set and feeds back the WQI of each channel via RF uplink;

[0214] Step 6: The RF AP determines the VLC downlink quality. If it is higher than a threshold, it sends the second RRC reconfiguration information through the RF downlink terminal.

[0215] Step 7: The terminal feeds back RRC reconfiguration completion information via RF uplink. The second RRC reconfiguration information instructs the terminal to perform VLC downlink data reception and stop RF downlink data reception.

[0216] Step 8: The RF AP notifies the VLC AP to start downlink data transmission on channel D. The RF AP stops sending downlink data and notifies the VLC AP and the terminal of the second VLM configuration. The second VLM configuration instructs the VLM to stop sending / receiving.

[0217] See Figure 13 This application provides a link management device for use in a terminal. The device 1300 includes:

[0218] The first transmitting module 1301 is used to report first information to the first access network device, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes: a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0219] The first acquisition module 1302 is used to acquire the downlink selected by the first access network device for the terminal according to the first information. The downlink includes a first downlink or a second downlink, and the first downlink includes a link between the terminal and the first access network device.

[0220] Optionally, the first wireless access network device can be an RF AP, and the second wireless access network device can be a VLC AP, but it is not limited to these.

[0221] In one embodiment of this application, the first transmitting module 1301 is further configured to: report the first information to the first access network device via a radio frequency uplink.

[0222] In one embodiment of this application, the second downlink channel quality indicator includes WQI.

[0223] In one embodiment of this application, the first acquisition module is further configured to:

[0224] The terminal receives a second message sent by the first access network device, the second message instructing the terminal to stop receiving the second downlink channel data and the first fast link recovery (FLR) configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal set of channels carrying the FLR.

[0225] Report third information to the first access network device, the third information indicating an FLR response;

[0226] The terminal receives fourth information sent by the first access network device, wherein the fourth information indicates that the downlink selected by the terminal is the second downlink.

[0227] In one embodiment of this application, the first acquisition module is further configured to:

[0228] The terminal receives first radio resource control reconfiguration information sent by the first access network device, wherein the first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0229] The fifth information is reported to the first access network device, and the fifth information indicates that the first radio resource control reconfiguration is completed.

[0230] In one embodiment of this application, the first acquisition module is further configured to:

[0231] The system receives a sixth message sent by the first access network device, the sixth message indicating a second FLR configuration and / or a first VLM configuration; the second FLR configuration includes an indication that the FLR stops receiving; the first VLM configuration includes one or more of the following: an indication of VLM reception, a VLM periodic configuration, and an optimal set of channels carrying the VLM.

[0232] The seventh information is reported to the first access network device, the seventh information indicating the channel quality of the second downlink;

[0233] The terminal receives second radio resource control reconfiguration information sent by the first access network device, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink.

[0234] The first access network device reports the eighth information, which indicates that the second radio resource control reconfiguration is complete;

[0235] The system receives a ninth message sent by the first access network device, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM should stop receiving.

[0236] The apparatus provided in this application embodiment can achieve... Figure 7 The various processes implemented in the method embodiments shown achieve the same technical effects, and will not be described again here to avoid repetition.

[0237] See Figure 14 This application provides a link management device applied to a first access network device. The device 1400 includes:

[0238] The first receiving module 1401 is used to receive first information reported by the terminal, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; wherein, the second downlink includes a link between the terminal and the second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal;

[0239] The determining module 1402 is configured to determine the downlink selected for the terminal based on the first information, wherein the downlink includes a first downlink or a second downlink, and the first downlink includes a link between the terminal and the first access network device;

[0240] The second transmitting module 1403 is used to indicate the downlink to the terminal and / or the second wireless access device.

[0241] In one embodiment of this application, the determining module 1402 is further configured to determine the downlink selected for the terminal based on the first information and the first decision condition.

[0242] In one embodiment of this application, the first judgment condition includes one or more of the following:

[0243] (1) The first consecutive number of ACKs were not received;

[0244] (2) Receive a second consecutive number of NACKs or DTXs;

[0245] (3) No ACK or NACK is received within the first preset time;

[0246] (4) The quality of the second downlink channel is lower than the first threshold.

[0247] In one embodiment of this application, the second sending module 1403 is further configured to:

[0248] Send a second message to the terminal, the second message instructing the terminal to stop receiving the second downlink channel data and the first Fast Link Recovery (FLR) configuration; the first FLR configuration includes one or more of the following: an indication of FLR reception; an FLR period configuration; and an optimal set of channels to carry the FLR.

[0249] Receive third information from the terminal, the third information indicating an FLR response;

[0250] A fourth message is sent to the terminal and the second wireless access network device, the fourth message indicating that the downlink selected by the terminal is the second downlink.

[0251] In one embodiment of this application, the device 1400 further includes:

[0252] The third transmitting module is used to transmit tenth information to the second radio access network device. The tenth information instructs the second radio access network device to stop transmitting data and the first FLR configuration. The first FLR configuration includes one or more of the following: an indication of FLR transmission, an FLR period configuration, and an optimal set of channels to carry the FLR.

[0253] In one embodiment of this application, the second sending module 1403 is further configured to:

[0254] Start the timer or set the maximum number of consecutive transfers for FLR;

[0255] If the first access network device does not receive an FLR response after the timer expires or after exceeding the maximum number of consecutive FLR transmissions, it sends a first radio resource control reconfiguration information to the terminal. The first radio resource control reconfiguration information indicates that the downlink selected by the terminal is the first downlink.

[0256] The terminal receives a fifth message indicating that the first radio resource control reconfiguration is complete.

[0257] In one embodiment of this application, the second sending module 1403 is further configured to:

[0258] A sixth message is sent to the terminal, the sixth message indicating a second FLR configuration and / or a first visible light link monitoring (VLM) configuration; the second FLR configuration includes an indication that the FLR stops transmitting / receiving; the first VLM configuration includes one or more of the following: an indication of VLM reception, a VLM periodic configuration, and an optimal set of channels carrying the VLM;

[0259] The terminal receives seventh information, which indicates the channel quality of the second downlink.

[0260] Send a second radio resource control reconfiguration information to the terminal, wherein the second radio resource control reconfiguration information indicates that the downlink selected by the terminal is the second downlink;

[0261] The terminal receives an eighth message, which indicates that the second radio resource control reconfiguration is complete.

[0262] A ninth message is sent to the terminal, the ninth message indicating a second VLM configuration; the second VLM configuration includes an indication that the VLM has stopped receiving.

[0263] In one embodiment of this application, the device 1400 further includes:

[0264] The fourth transmitting module is used to transmit a thirteenth message to the second radio access network device. The thirteenth message indicates the second FLR configuration and / or the first visible light link monitoring (VLM) configuration. The second FLR configuration includes an indication to stop FLR transmission. The first VLM configuration includes one or more of the following: an indication to transmit VLM, a VLM periodic configuration, and an optimal set of channels to carry the VLM.

[0265] In one embodiment of this application, the device 1400 further includes:

[0266] The fifth sending module is configured to send eleventh information to the second radio access network device, the eleventh information instructing the second radio access network device to perform downlink data transmission through the second downlink; and to send twelfth information to the terminal and the second radio access network device, the twelfth information instructing a second VLM configuration, the second VLM configuration including an instruction to stop VLM transmission.

[0267] The apparatus provided in this application embodiment can achieve... Figure 8 The various processes implemented in the method embodiments shown achieve the same technical effects, and will not be described again here to avoid repetition.

[0268] See Figure 15 This application provides a link management device applied to a second access network device. The device 1500 includes:

[0269] The second receiving module 1501 is configured to receive a first FLR configuration from the first access network device, the first FLR configuration including one or more of the following: an indication of FLR transmission, an FLR period configuration, and an optimal set of channels for carrying the FLR; or, to receive a second FLR configuration and / or a first VLM configuration from the first access network; the second FLR configuration includes an indication of FLR stop transmission; the first VLM configuration includes one or more of the following: an indication of VLM transmission, a VLM period configuration, and an optimal set of channels for carrying the VLM;

[0270] The sixth transmitting module 1502 is configured to transmit an FLR signal to the terminal on the optimal channel set according to the first FLR configuration; or, transmit a VLM signal to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration.

[0271] In one embodiment of this application, the apparatus further includes:

[0272] A third receiving module is configured to receive fourth information from the first wireless access network device, the fourth information indicating that the downlink selected by the terminal is a second downlink. In one embodiment of this application, the apparatus further includes:

[0273] The fifth receiving module is configured to receive eleventh information from the first radio access network device, the eleventh information instructing the second radio access network device to perform downlink data transmission through the second downlink; send data to the terminal according to the eleventh information; and receive twelfth information from the first radio access network device, the twelfth information instructing a second VLM configuration, the second VLM configuration including an instruction to stop VLM transmission.

[0274] The apparatus provided in this application embodiment can implement the various processes implemented in the method embodiment shown in FIG9 and achieve the same technical effect. To avoid repetition, it will not be described again here.

[0275] Please see Figure 16 , Figure 16 This is a structural diagram of the network-side device used in an embodiment of the present invention, such as... Figure 16 As shown, the network-side device 1600 includes: a processor 1601, a transceiver 1602, a memory 1603, and a bus interface, wherein:

[0276] In one embodiment of the present invention, the network-side device 1600 further includes: a program stored on memory 1203 and executable on processor 1601, wherein the program, when executed by processor 1601, implements as follows: Figure 7 or Figure 8 Or the steps of the embodiment shown in Figure 9.

[0277] exist Figure 16 In this context, the bus architecture can include any number of interconnected buses and bridges, specifically linking various circuits together, such as one or more processors represented by processor 1601 and memory represented by memory 1603. The bus architecture can also link together various other circuits, such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. The bus interface provides an interface. The transceiver 1602 can be multiple elements, including transmitters and receivers, providing a unit for communicating with various other devices over a transmission medium.

[0278] The processor 1601 is responsible for managing the bus architecture and general processing, while the memory 1603 can store the data used by the processor 1601 when performing operations.

[0279] The network-side device provided in this application embodiment can achieve... Figure 8 The various processes implemented in the method embodiment shown in Figure 9 achieve the same technical effect, and will not be described again here to avoid repetition.

[0280] Figure 17 To realize the hardware structure diagram of a terminal according to an embodiment of this application, the terminal 1700 includes, but is not limited to: radio frequency unit 1701, network module 1702, audio output unit 1703, input unit 1704, sensor 1705, display unit 1706, user input unit 1707, interface unit 1708, memory 1709, and processor 1710, etc.

[0281] Those skilled in the art will understand that the terminal 1700 may also include a power supply (such as a battery) for supplying power to various components. The power supply may be logically connected to the processor 1710 through a power management system, thereby enabling functions such as managing charging, discharging, and power consumption through the power management system. Figure 17 The terminal structure shown does not constitute a limitation on the terminal. The terminal may include more or fewer components than shown, or combine certain components, or have different component arrangements, which will not be elaborated here.

[0282] It should be understood that, in this embodiment, the input unit 1704 may include a graphics processing unit (GPU) 17041 and a microphone 17042. The GPU 17041 processes image data of still images or videos obtained by an image capture device (such as a camera) in video capture mode or image capture mode. The display unit 1706 may include a display panel 17061, which may be configured in the form of a liquid crystal display, an organic light-emitting diode, or the like. The user input unit 1707 includes a touch panel 17071 and other input devices 17072. The touch panel 17071 is also called a touch screen. The touch panel 17071 may include a touch detection device and a touch controller. Other input devices 17072 may include, but are not limited to, a physical keyboard, function keys (such as volume control buttons, power buttons, etc.), a trackball, a mouse, and a joystick, which will not be described in detail here.

[0283] In this embodiment, the radio frequency unit 1701 receives downlink data from the network-side device and processes it for the processor 1710; additionally, it sends uplink data to the network-side device. Typically, the radio frequency unit 1701 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low-noise amplifier, a duplexer, etc.

[0284] The memory 1709 can be used to store software programs or instructions and various data. The memory 1709 may primarily include a program or instruction storage area and a data storage area. The program or instruction storage area may store the operating system, application programs or instructions required for at least one function (such as sound playback, image playback, etc.). Furthermore, the memory 1709 may include high-speed random access memory and non-volatile memory, which may be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. For example, at least one disk storage device, flash memory device, or other non-volatile solid-state storage device.

[0285] Processor 1710 may include one or more processing units; optionally, processor 1710 may integrate an application processor and a modem processor, wherein the application processor mainly handles the operating system, user interface, and applications or instructions, and the modem processor mainly handles wireless communication, such as a baseband processor. It is understood that the aforementioned modem processor may also not be integrated into processor 1710.

[0286] The terminal provided in this application embodiment can achieve... Figure 7 The various processes implemented in the method embodiments shown achieve the same technical effects, and will not be described again here to avoid repetition.

[0287] This application embodiment also provides a readable storage medium storing a program or instructions that, when executed by a processor, implement the above-described functionality. Figure 7 or Figure 8 The various processes of the method embodiment shown in Figure 9 can achieve the same technical effect, and will not be described again here to avoid repetition.

[0288] The processor mentioned above is the processor in the terminal described in the above embodiments. The readable storage medium includes computer-readable storage media, such as computer read-only memory (ROM), random access memory (RAM), magnetic disk, or optical disk.

[0289] The steps of the methods or algorithms described in this application can be implemented in hardware or by executing software instructions on a processor. The software instructions can consist of corresponding software modules, which can be stored in RAM, flash memory, ROM, EPROM, EEPROM, registers, hard disk, portable hard disk, read-only optical disk, or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor, enabling the processor to read information from and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and storage medium can be housed in an ASIC. Alternatively, the ASIC can be housed in a core network interface device. Of course, the processor and storage medium can also exist as discrete components in the core network interface device.

[0290] Those skilled in the art will recognize that, in one or more of the examples above, the functions described in this application can be implemented using hardware, software, firmware, or any combination thereof. When implemented in software, these functions can be stored in a computer-readable medium or transmitted as one or more instructions or code on a computer-readable medium. Computer-readable media include computer storage media and communication media, wherein communication media include any medium that facilitates the transfer of a computer program from one place to another. Storage media can be any available medium accessible to a general-purpose or special-purpose computer.

[0291] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made on the basis of the technical solution of this application should be included within the scope of protection of this application.

[0292] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, embodiments of this application can take the form of entirely hardware embodiments, entirely software embodiments, or embodiments combining software and hardware aspects. Furthermore, embodiments of this application can take the form of computer program products implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0293] This application describes embodiments of methods, apparatus (systems), and computer program products according to embodiments of this application with reference to flowchart illustrations and / or block diagrams. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0294] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0295] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0296] Obviously, those skilled in the art can make various modifications and variations to the embodiments of this application without departing from the spirit and scope of this application. Therefore, if these modifications and variations to the embodiments of this application fall within the scope of the claims of this application and their equivalents, this application also intends to include these modifications and variations.

Claims

1. A link management method applied to a terminal, characterized in that, The method comprises: reporting first information to a first access network device, the first information indicating one or more of: second downlink channel quality, hybrid automatic repeat request (HARQ) feedback information of the second downlink channel, and second downlink transmission failure; wherein the second downlink comprises a link between the terminal and a second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal; obtaining a downlink selected by the first access network device for the terminal according to the first information, the downlink comprising a first downlink or the second downlink, and the first downlink comprising a link between the terminal and the first access network device; The method further comprises: receiving second information sent by the first access network device, the second information indicating that the terminal stops receiving second downlink channel data and a first fast link recovery (FLR) configuration; the first FLR configuration comprising one or more of: an indication of FLR reception, an FLR period configuration, and an optimal channel set carrying the FLR; reporting third information to the first access network device, the third information indicating an FLR response; receiving fourth information sent by the first access network device, the fourth information indicating that the downlink selected for the terminal is the second downlink.

2. The method of claim 1, wherein, The step of reporting first information to a first access network device comprises: reporting the first information to the first access network device through a radio frequency uplink.

3. The method of claim 1, wherein, The second downlink channel quality indication comprises a wavelength quality indication (WQI).

4. The method of claim 1, wherein, The method further comprises: receiving first radio resource control (RRC) reconfiguration information sent by the first access network device, the first RRC reconfiguration information indicating that the downlink selected for the terminal is the first downlink; reporting fifth information to the first access network device, the fifth information indicating completion of first RRC reconfiguration.

5. The method of claim 1, wherein, The method further comprises: receiving sixth information sent by the first access network device, the sixth information indicating a second FLR configuration and / or a first visible light link monitoring (VLM) configuration; the second FLR configuration comprising an indication of FLR stop receiving; and the first VLM configuration comprising one or more of: an indication of VLM reception, a VLM period configuration, and an optimal channel set carrying the VLM; reporting seventh information to the first access network device, the seventh information indicating channel quality of the second downlink; receiving second RRC reconfiguration information sent by the first access network device, the second RRC reconfiguration information indicating that the downlink selected for the terminal is the second downlink; reporting eighth information to the first access network device, the eighth information indicating completion of second RRC reconfiguration; receiving ninth information sent by the first access network device, the ninth information indicating a second VLM configuration; the second VLM configuration comprising an indication of VLM stop receiving.

6. A link management method, applied to a first access network device, the method comprising: The method comprises: receiving first information reported by the terminal, the first information indicating one or more of: a second downlink channel quality, HARQ feedback information of a second downlink channel, and a second downlink transmission failure; wherein the second downlink comprises a link between the terminal and a second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal; determining, according to the first information, a downlink selected for the terminal, the downlink comprising the first downlink or the second downlink, the first downlink comprising a link between the terminal and the first access network device; indicating the downlink to the terminal and / or the second access device; the step of indicating the downlink to the terminal comprises: sending second information to the terminal, the second information indicating that the terminal stops receiving second downlink channel data and a first fast link recovery (FLR) configuration; the first FLR configuration comprising one or more of: an indication of FLR reception, an FLR period configuration, and an optimal channel set carrying the FLR; receiving third information from the terminal, the third information indicating an FLR response; sending fourth information to the terminal and the second access network device, the fourth information indicating that the downlink selected for the terminal is the second downlink.

7. The method of claim 6, wherein, the step of determining, according to the first information, the downlink selected for the terminal comprises: determining, based on the first information and a first decision condition, the downlink selected for the terminal.

8. The method of claim 7, wherein, the first decision condition comprises one or more of: not receiving a continuous first number of acknowledgement (ACK) responses; receiving a continuous second number of negative acknowledgement (NACK) or discontinuous transmission (DTX); not receiving an ACK or a negative acknowledgement (NACK) within a first preset time; a second downlink channel quality being lower than a first threshold value.

9. The method of claim 6, wherein, the method further comprises: sending tenth information to the second access network device, the tenth information indicating that the second access network device stops sending data and the first FLR configuration, the first FLR configuration comprising one or more of: an indication of FLR transmission, an FLR period configuration, and an optimal channel set carrying the FLR.

10. The method of claim 6, wherein, the step of indicating the downlink to the terminal comprises: starting a timer or setting a maximum number of consecutive FLR transmissions; after the timer expires or the maximum number of consecutive FLR transmissions is exceeded without receiving an FLR response, the first access network device sends first radio resource control (RRC) reconfiguration information to the terminal, the first RRC reconfiguration information indicating that the downlink selected for the terminal is the first downlink; receiving fifth information from the terminal, the fifth information indicating that the first RRC reconfiguration is complete.

11. The method of claim 6, wherein, the step of indicating the downlink to the terminal comprises: sending sixth information to the terminal, the sixth information indicating a second FLR configuration and / or a first visible light link monitoring (VLM) configuration; the second FLR configuration comprising an indication of FLR stop receiving; the first VLM configuration comprising one or more of: an indication of VLM receiving, a VLM period configuration, an optimal channel set carrying VLM; receiving seventh information from the terminal, the seventh information indicating a channel quality of the second downlink; sending second radio resource control (RRC) reconfiguration information to the terminal, the second RRC reconfiguration information indicating that a downlink selected for the terminal is the second downlink; receiving eighth information from the terminal, the eighth information indicating second RRC reconfiguration completion; sending ninth information to the terminal, the ninth information indicating a second VLM configuration; the second VLM configuration comprising an indication of VLM stop receiving.

12. The method of claim 11, wherein, The method further comprises: sending thirteenth information to the second access network device, the thirteenth information indicating a second FLR configuration and / or a first VLM configuration; the second FLR configuration comprising an indication of FLR stop sending; the first VLM configuration comprising one or more of: an indication of VLM sending, a VLM period configuration, an optimal channel set carrying VLM.

13. The method of claim 11, wherein, After receiving the eighth information from the terminal, the method further comprises: sending eleventh information to the second access network device, the eleventh information indicating that the second access network device performs downlink data transmission through the second downlink; sending twelfth information to the terminal and the second access network device, the twelfth information indicating a second VLM configuration, the second VLM configuration comprising an indication of VLM stop sending.

14. A link management method, applied to a second access network device, comprising: Comprising: receiving second FLR configuration and / or first visible light link monitoring (VLM) configuration from a first access network device; the second FLR configuration comprising an indication of FLR stop sending; the first VLM configuration comprising one or more of: an indication of VLM sending, a VLM period configuration, an optimal channel set carrying VLM; sending VLM signal to a terminal on a shared channel set according to the second FLR configuration and / or first VLM configuration; receiving eleventh information from the first access network device, the eleventh information indicating that the second access network device performs downlink data transmission through the second downlink; Wherein, the first access network device and the terminal comprise a first downlink, and the second access network device and the terminal comprise a second downlink; the first access network device can provide radio frequency access to the terminal, and the second access network device can provide visible light access to the terminal.

15. The method of claim 14, wherein, After the sending VLM signal to a terminal on a shared channel set according to the second FLR configuration and / or first VLM configuration, the method further comprises: sending data to the terminal according to the eleventh information; receiving twelfth information from the first access network device, the twelfth information indicating a second VLM configuration, the second VLM configuration comprising an indication of VLM stop sending.

16. A link management apparatus applied to a terminal, characterized in that, Comprising: The first sending module is configured to report first information to the first access network device, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure; and the second downlink includes a link between the terminal and the second access network device. The first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal. The first obtaining module is configured to obtain a downlink selected by the first access network device for the terminal according to the first information, the downlink including a first downlink or a second downlink, and the first downlink including a link between the terminal and the first access network device. The first obtaining module is further configured to receive second information sent by the first access network device, the second information indicating that the terminal stops receiving second downlink channel data and a first fast link recovery (FLR) configuration; and the first FLR configuration including one or more of the following: an indication of FLR reception, an FLR period configuration, and an optimal channel set carrying the FLR. The terminal reports third information to the first access network device, the third information indicating an FLR response. The terminal receives fourth information sent by the first access network device, the fourth information indicating that the downlink selected for the terminal is the second downlink.

17. A link management apparatus, applied to a first access network device, characterized in that, The first receiving module is configured to receive first information reported by a terminal, the first information indicating one or more of the following: second downlink channel quality, HARQ feedback information of the second downlink channel, and second downlink transmission failure. The second downlink includes a link between the terminal and a second access network device; the first access network device is capable of providing radio frequency access to the terminal, and the second access network device is capable of providing visible light access to the terminal. The determining module is configured to determine a downlink selected for the terminal according to the first information, the downlink including a first downlink or a second downlink, and the first downlink including a link between the terminal and the first access network device. The second sending module is configured to indicate the downlink to the terminal and / or a second access device. The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to:

18. A link management apparatus, applied to a second access network device, characterized in that, The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module is further configured to: The second sending module The second receiving module is configured to receive a second FLR configuration and / or a first visible light link monitoring (VLM) configuration from the first access network device; the second FLR configuration comprises an indication of FLR stop transmitting; and the first VLM configuration comprises one or more of the following: an indication of VLM transmitting, a VLM period configuration, and an optimal channel set carrying VLM. The sixth sending module is configured to send a VLM signal to the terminal on the shared channel set according to the second FLR configuration and / or the first VLM configuration. The fifth receiving module is configured to receive eleventh information from the first access network device, the eleventh information indicating that the second access network device performs downlink data transmission through a second downlink. The first access network device and the terminal are connected through a first downlink, and the second access network device and the terminal are connected through a second downlink; the first access network device can provide radio frequency access to the terminal, and the second access network device can provide visible light access to the terminal.

19. A terminal, characterized by The apparatus comprises: a processor, a memory, and a program stored in the memory and executable on the processor, the program, when executed by the processor, implements the steps of the method according to any one of claims 1-5.

20. A network-side device, comprising: The apparatus comprises: a processor, a memory, and a program stored in the memory and executable on the processor, the program, when executed by the processor, implements the steps of the method according to any one of claims 6-15.

21. A readable storage medium, characterized by, The readable storage medium stores a program, the program, when executed by the processor, implements the steps of the method according to any one of claims 1-15.

Images