Link parameter changing method and device and electronic equipment

Abstract

The invention discloses a link parameter changing method, a link parameter changing device and electronic equipment. The method comprises the following steps: receiving a link parameter change request; in response to the link parameter change request, determining a target link parameter corresponding to the target access point device according to the device address and the link change identifier; determining a target change signal according to the target link parameter and the initial change signal; and controlling a link parameter corresponding to the target access point device to be changed into a target link parameter, and sending a target change signal to a target device, the target device comprising at least one of the terminal device and other access point devices. According to the invention, the technical problem of disordered data packet transmission management in a complex scene that a plurality of access point devices exist in a data transmission network in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the field of data processing, and in particular, to a method, apparatus, and electronic device for changing link parameters. Background Art

[0002] Data transmission links play a crucial role in modern network communication. Selecting the link with the best signal quality can significantly improve the efficiency of data transmission and the overall performance of the network. Currently, when performing data link switching, seamless roaming switching is usually adopted. However, in the face of complex scenarios where there are multiple access point devices in the data transmission network, there are technical problems of chaotic packet transmission management.

[0003] In response to the above problems, no effective solution has been proposed yet. Summary of the Invention

[0004] Embodiments of the present invention provide a method, apparatus, and electronic device for changing link parameters, so as to at least solve the technical problem of chaotic packet transmission management in the related art in the face of complex scenarios where there are multiple access point devices in the data transmission network.

[0005] According to one aspect of the embodiments of the present invention, a method for changing link parameters is provided, including: receiving a link parameter change request, where the link parameter change request carries an initial change signal, and the initial change signal includes a device address of a terminal device and a link change identifier; in response to the link parameter change request, determining target link parameters corresponding to a target access point device according to the device address and the link change identifier, where the target link parameters are used to determine a data transmission flow direction in the target access point device; determining a target change signal according to the target link parameters and the initial change signal; controlling the link parameters corresponding to the target access point device to be changed to the target link parameters, and sending the target change signal to a target device, where the target device includes at least one of the following: the terminal device, and other access point devices, and the other access point devices are access point devices communicatively connected to the target access point device.

[0006] Optionally, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the target device includes: when the link change identifier indicates that the link is disconnected and the target device includes the terminal device, determining the transmission data result of whether the target access point device is transmitting data to the terminal device; when the transmission data result is that the target access point device is transmitting data to the terminal device, acquiring the data to be transmitted; combining the data to be transmitted with the target change signal to obtain combined data; after sending the combined data to the terminal device, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters, and enabling the terminal device to determine the change result of whether the full-link parameters in the system are changed according to the target change signal.

[0007] Optionally, combining the data to be transmitted with the target change signal to obtain combined data includes: when the data to be transmitted is transmitted in the form of multiple queues, determining the sub-transmission data corresponding to the multiple queues respectively; according to the target change signal, determining the sub-change signals corresponding to the multiple queues respectively; respectively combining the corresponding sub-transmission data with the corresponding sub-change signals to obtain multiple sub-combined data; after sending the multiple sub-combined data to the terminal device, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters.

[0008] Optionally, after controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the remaining access point devices, it further includes: when the link change identifier indicates that the link is connected and the target device includes the remaining access point devices, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the remaining access point devices, so that the remaining access point devices change the corresponding link parameters to the corresponding updated link parameters according to the target change signal.

[0009] Optionally, before determining the target change signal according to the target link parameters and the initial change signal, it further includes: when the target access point device has initial link parameters, determining the comparison result of whether the initial link parameters are the same as the target link parameters; when the comparison result is that the target link parameters are the same as the initial link parameters, discarding the initial change signal.

[0010] Optionally, after sending the target change signal to the target device, it further includes: determining a feedback result of whether a response signal is received within a predetermined time, where the response signal is a signal fed back by the target device; in the case where the feedback result is that the response signal is not received within the predetermined time, determining a retry parameter, where the retry parameter includes a retry count threshold and a retry time interval; determining a retry change signal according to the target change signal; and in the case where the number of times of sending the retry change signal is less than the retry count threshold, sending the retry change signal to the target device according to the retry time interval.

[0011] According to one aspect of an embodiment of the present invention, a link parameter change system is provided, including: a target access point device, a target device, where the target device includes at least one of the following: a terminal device, other access point devices, and the target access point device is configured to receive a link parameter change request, where an initial change signal is carried in the link parameter change request, and the initial change signal includes a device address of the terminal device and a link change identifier; in response to the link parameter change request, determining a target link parameter corresponding to the target access point device according to the device address and the link change identifier, where the target link parameter is used to determine a data transmission direction in the target access point device; determining a target change signal according to the target link parameter and the initial change signal; controlling the link parameter corresponding to the target access point device to be changed to the target link parameter, and sending the target change signal to the target device.

[0012] Optionally, in the case where the target device is the terminal device, the terminal device determines a change result of whether full link parameter change is completed in the system according to the target change signal; and / or, in the case where the target device is the other access point devices, the other access point devices change the corresponding link parameter to the corresponding updated link parameter according to the target change signal.

[0013] According to one aspect of an embodiment of the present invention, an electronic device is provided, including: a processor; a memory for storing instructions executable by the processor; where the processor is configured to execute the instructions to implement the link parameter change method in any one of the above.

[0014] According to one aspect of an embodiment of the present invention, a computer-readable storage medium is provided, and when the instructions in the computer-readable storage medium are executed by a processor of an electronic device, the electronic device can execute the link parameter change method in any one of the above.

[0015] According to one aspect of an embodiment of the present invention, there is provided a computer program product, including a computer program which, when executed by a processor, implements the steps of any one of the above methods.

[0016] In an embodiment of the present invention, a receiving link parameter change request is adopted, wherein the link parameter change request carries an initial change signal, and the initial change signal includes the device address of the terminal device and the link change identifier; in response to the link parameter change request, according to the device address and the link change identifier, a target link parameter corresponding to the target access point device is determined, wherein the target link parameter is used to determine the data transmission flow direction in the target access point device; according to the target link parameter and the initial change signal, a target change signal is determined; the link parameter corresponding to the target access point device is controlled to be changed to the target link parameter, and the target change signal is sent to the target device, and the target device includes at least one of the following: the terminal device, the remaining access point devices, wherein the remaining access point devices are access point devices communicatively connected to the target access point device. By determining the target change signal according to the target link parameter and the initial change signal, the purpose of controlling the link parameter corresponding to the target access point device to be changed to the target link parameter and sending the target change signal to the target device is achieved, thereby realizing the modification of the link parameter in the data transmission system, enabling all access point devices in the data transmission system to transmit data packets according to the target forwarding rule, and further solving the technical problem of chaotic data packet transmission management in the related art when facing a complex scenario with multiple access point devices in the data transmission network. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are used to provide a further understanding of the present invention, and constitute a part of this application. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0018] Figure 1 is a flowchart of the link parameter change method according to an embodiment of the present invention;

[0019] Figure 2 is a schematic diagram of seamless roaming technology provided by an optional embodiment of the present invention;

[0020] Figure 3 is a connection diagram of data transmission network devices provided by an optional embodiment of the present invention;

[0021] Figure 4 is a flowchart of the method for a target device to determine link parameters provided by an optional embodiment of the present invention;

[0022] Figure 5 is a flowchart of the target change signal retransmission mechanism provided by an optional embodiment of the present invention;

[0023] Figure 6 It is a flowchart of a cache data forwarding method provided by an alternative embodiment of the present invention;

[0024] Figure 7 It is another flowchart of a cache data forwarding method provided by an alternative embodiment of the present invention;

[0025] Figure 8 It is yet another flowchart of a cache data forwarding method provided by an alternative embodiment of the present invention. Specific Embodiments

[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not necessarily have to be limited to those clearly listed steps or units, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0028] First, some nouns or terms that appear during the description of the embodiments of the present application are applicable to the following explanations:

[0029] Mesh network: A wireless mesh network, which is a new type of wireless network technology. All nodes are interconnected, and each node has multiple connection channels, forming an overall network.

[0030] MLD device: A multi-link aggregation device, which is a communication command device that can aggregate multiple network links into a logical link to achieve high-speed, stable, and reliable data transmission. Its core technologies include link aggregation, load balancing, fault switching, etc., and can realize intelligent management and optimized utilization of different network links, improving the efficiency and stability of data transmission.

[0031] Non-AP MLD device: A non-access point multi-link device, which in a multi-link communication system is not directly an access point but can communicate with multiple access point devices and achieve connection and data transmission with other devices through these access point devices.

[0032] AP MLD device: A network device used to bridge a wired network and a wireless network, providing network connections to surrounding devices via wireless signals.

[0033] MLD seamless roaming technology: An advanced wireless network communication technology. In a wireless network environment, the client of a multi-link device can achieve fast, smooth, and uninterrupted network connection switching between different access point devices.

[0034] MLO roaming: A technology that supports seamless, fast, and stable network connection switching for client devices between different access points or mesh nodes in a wireless network environment with multi-link operation.

[0035] QoS queue: Quality of Service queue, a mechanism for managing and optimizing network communication. According to factors such as the priority of data packets and service requirements, data packets are divided into different queues and scheduled and processed according to certain rules.

[0036] Embodiment 1

[0037] According to an embodiment of the present invention, an embodiment of a method for changing link parameters is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. And although the logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in a different order than here.

[0038] Figure 1 is a flowchart of the method for changing link parameters according to an embodiment of the present invention. As Figure 1 shown, the method includes the following steps:

[0039] Step S102, receiving a link parameter change request, where the link parameter change request carries an initial change signal, and the initial change signal includes the device address of the terminal device and the link change identifier.

[0040] In step S102 provided in this application, a link parameter change request is received.

[0041] Among them, a link parameter change request is involved. A link parameter change request refers to a communication signal used between network devices to request adjustment of the parameters of an existing link. Such a request is usually in response to scenarios such as network topology changes, device movement (such as roaming), performance optimization requirements, or fault recovery.

[0042] Among them, an initial change signal is involved. The initial change signal refers to a specific signal included in a link parameter change request, which is used by network devices to identify the source, change type, and change requirements of the change request.

[0043] Among them, a terminal device is involved. The terminal device refers to a device in a data transmission network that can communicate through multiple links simultaneously but does not act as an access point. It usually refers to mobile terminal devices such as smartphones, laptops, and Internet of Things devices.

[0044] Among them, a device address is involved. The device address refers to the unique identifier of a terminal device in the network, usually the Media Access Control address (MAC address), which is used to locate a specific terminal device in the network to communicate with a specific terminal device.

[0045] Among them, a link change identifier is involved. The link change identifier refers to an identifier used to indicate the type of link change involved in the request. Among them, the link change types include adding a link, deleting a link, changing link characteristics, etc.

[0046] In this step, the target access point device receives a link parameter change request in the data transmission system. The request contains an initial change signal, which carries the device address (such as MAC address) of the terminal device, and a link change identifier indicating the specific change type of the request. This is the starting step of link parameter change in the data transmission system. Through the link parameter change request, the target access point device can be notified to adjust the corresponding adjustment parameters to ensure the continuity of data transmission during the roaming process, avoid packet loss or delay, and provide a smoother roaming experience.

[0047] It should be noted that in addition to carrying the device address and the link change identifier, the initial change signal also contains additional information such as signal strength, signal-to-noise ratio, delay, and link type, which helps network devices make more accurate decisions. In this way, the data transmission network can achieve adaptive adjustment, determine the link with the best signal for data transmission, better respond to the dynamically changing network requirements, improve the intelligence and efficiency of the network, and provide higher-quality communication services for users.

[0048] Step S104, in response to the link parameter change request, determine the target link parameters corresponding to the target access point device according to the device address and the link change identifier, where the target link parameters are used to determine the data transmission flow direction in the target access point device.

[0049] In step S104 provided in this application, the target link parameters corresponding to the target access point device are determined.

[0050] Among them, the target access point device is involved. The target access point device refers to the access point device that needs to respond to the link parameter change request and adjust the link parameters. Here, the access point device is an access point in the data transmission network that can communicate with the network through multiple links simultaneously. It provides wireless access services for other devices in the network and has the ability to handle multi-link communication.

[0051] Among them, the target link parameters are involved. The target link parameters refer to the parameters of the transmission link between the target access point device and the terminal device. For example, signal strength threshold, frequency band selection, forwarding rules, etc., which are used to guide how data is transmitted between the target access point device and the terminal device.

[0052] In this step, when receiving the link parameter change request, the target access point device will determine the target link parameters corresponding to the target access point device according to the device address and link change identifier carried in the request. Subsequently, the target access point device will adjust the data transmission between it and the terminal device based on the determined target link parameters. During the process of link switching in the data transmission network, the target access point device can be the access point device initially connected to the terminal device. At this time, the target link parameters are the link parameters corresponding to the initial transmission link. The target access point device can also be the access point device connected to the terminal device after the link change. At this time, the target link parameters are the link parameters corresponding to the data transmission link connected to the terminal device after the link change.

[0053] Through this step, determining the link parameters corresponding to the change requirements according to the link change identifier helps the dynamic allocation of network resources, ensures that the link can provide the best service under different performance requirements, and avoids the waste of network resources.

[0054] Step S106, determine the target change signal based on the target link parameters and the initial change signal.

[0055] In step S106 provided in this application, the target change signal is determined.

[0056] Among them, the target change signal is involved. The target change signal refers to the signal or control frame generated by the target access point device, which is used to guide how multiple access point devices in the data transmission network change their link parameters.

[0057] Through this step, generating the target change signal that guides multiple access point devices in the data transmission network to change their link parameters. The target change signal can help multiple access point devices accurately and quickly adjust their parameters to adapt to network changes or optimize data transmission, ensure the smooth transition of link changes, avoid sudden interruption of data transmission, and ensure the continuity of network communication and service quality.

[0058] Step S108: Control the link parameters corresponding to the target access point device to be changed to the target link parameters, and send a target change signal to the target device, where the target device includes at least one of the following: a terminal device, and other access point devices, where the other access point devices are access point devices communicatively connected to the target access point device.

[0059] In step S108 provided in this application, control the link parameters corresponding to the target access point device to be changed to the target link parameters, and send a target change signal to the target device. During the process of link switching in the data transmission network, when the target access point device is the access point device initially connected to the terminal device, the target device is the terminal device. At this time, the target change signal is sent to the terminal device to ensure that the data packets in the data transmission network are transmitted correctly and efficiently. When the target access point device is the access point device connected to the terminal device after the link is changed, the target device is the other access point devices. At this time, the target change signal is sent to the other access point devices to precisely control the link parameters of the data transmission network, help multiple devices in the network to coordinate their actions, and avoid conflicts in data transmission.

[0060] It should be noted that when the target access point device is the access point device connected to the terminal device after the link is changed, and the target access point device is communicatively connected to multiple other access points, the target access point device needs to send multiple target change signals to ensure that all relevant devices correctly adjust their parameters, thereby avoiding loops and conflicts in data transmission.

[0061] Through the above steps S102 - S108, a link parameter change request is received. The link parameter change request carries an initial change signal, and the initial change signal includes the device address of the terminal device and a link change identifier. In response to the link parameter change request, according to the device address and the link change identifier, target link parameters corresponding to the target access point device are determined, where the target link parameters are used to determine the data transmission direction in the target access point device. According to the target link parameters and the initial change signal, a target change signal is determined. The link parameters corresponding to the target access point device are controlled to be changed to the target link parameters, and the target change signal is sent to the target device, where the target device includes at least one of the following: the terminal device, and other access point devices, and the other access point devices are access point devices communicatively connected to the target access point device. By determining the target change signal according to the target link parameters and the initial change signal, the purpose of controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the target device is achieved, thereby realizing the modification of the link parameters in the data transmission system and enabling all access point devices in the data transmission system to transmit data packets according to the target forwarding rules, and further solving the technical problem of chaotic data packet transmission management in the related art when facing a complex scenario with multiple access point devices in the data transmission network.

[0062] As an optional embodiment, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the target device includes: when the link change identifier indicates that the link is disconnected and the target device includes the terminal device, determining the transmission data result of whether the target access point device is transmitting data to the terminal device; when the transmission data result is that the target access point device is transmitting data to the terminal device, obtaining the data to be transmitted; combining the data to be transmitted and the target change signal to obtain combined data; after sending the combined data to the terminal device, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and enabling the terminal device to determine the change result of whether the full - link parameter change in the system is completed according to the target change signal.

[0063] In this embodiment, the specific steps of controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the target device are described when the link change identifier indicates that the link is disconnected and the target device includes the terminal device.

[0064] Among them, the transmission data result is involved. The transmission data result refers to the data transmission state between the target access point device and the terminal device before receiving the change signal. The transmission data result is used to indicate whether the current target access point device has data to be sent to the terminal device.

[0065] Among them, the data to be transmitted is involved. The data to be transmitted refers to the data packets or data streams that have not been completely sent between the target access point device and the terminal device. These data have been stored in the cache of the target access point device and are waiting to be sent.

[0066] Among them, the combined data is involved. The combined data refers to the data to be transmitted with the target change signal added after the data.

[0067] Among them, the change result is involved. The change result refers to the result of whether the access point device related to the current link parameter change request in the data transmission network has completed the link parameter change.

[0068] In this step, when the target access point device is the access point device initially connected to the terminal device and the link change identifier indicates that the link is disconnected, the target device is the terminal device. At this time, first determine whether there is data to be transmitted in the target access point device. If there is cached data, the target access point device combines this data to be transmitted with the target change signal to form combined data, and then sends the combined data packet to the terminal device, so that the terminal device can receive the target change signal while receiving all the data to be transmitted. Finally, control the link parameter corresponding to the target access point device to change to the target link parameter.

[0069] Through this step, all the data to be transmitted is sent before the link parameter change, and the target change signal is added at the end of the data to be transmitted, ensuring the integrity of data transmission, avoiding data loss caused by link disconnection, and at the same time, judging whether the full link parameters in the entire network have been changed according to the situation that the terminal device receives the target change signal, that is, whether all relevant access point devices have adjusted the link parameters to adapt to network changes.

[0070] It should be noted that the target change signal contains detailed information about the new link, such as the address of the new access point device, the link type, the signal strength requirement, etc. After receiving the signal, the terminal device can quickly establish a connection with the new link and perform seamless switching.

[0071] As an optional embodiment, combining the data to be transmitted with the target change signal to obtain combined data includes: when the data to be transmitted is transmitted in multiple queues, determining the sub-transmission data corresponding to the multiple queues respectively; determining the sub-change signals corresponding to the multiple queues respectively according to the target change signal; respectively combining the corresponding sub-transmission data with the corresponding sub-change signals to obtain multiple sub-combined data; after sending the multiple sub-combined data to the terminal device, controlling the link parameter corresponding to the target access point device to change to the target link parameter.

[0072] In this embodiment, the specific steps of combining the data to be transmitted with the target change signal to obtain the combined data are described in the case where the data to be transmitted is transmitted in the form of multiple queues.

[0073] Among them, sub-transmission data is involved. The sub-transmission data refers to the subset of the data to be transmitted that is decomposed into corresponding data subsets for each queue, that is, the sub-transmission data. The sub-transmission data contains the data to be sent in the corresponding queue.

[0074] Among them, sub-change signals are involved. The sub-change signals refer to the sub-signals of the target change signal that are decomposed into corresponding signals for each queue, that is, the sub-change signals.

[0075] Among them, sub-combined data is involved. The sub-combined data refers to the multiple sub-combined data formed by combining the sub-transmission data corresponding to each queue with the sub-change signals.

[0076] In this step, during data transmission, in order to manage different types or priorities of data, the network device will use multiple queues to store the data to be transmitted. If there are multiple queues in the target access point device, the network control device or the target access point device will first determine the sub-transmission data corresponding to these queues respectively. Then, according to the target change signal, the sub-change signals corresponding to each queue are decomposed. After that, each sub-transmission data is combined with the corresponding sub-change signal to form multiple sub-combined data. Finally, the sub-combined data is sent to the terminal device. Through this step, after receiving the sub-combined data, the terminal device can judge the state of the network link parameters according to the sub-change signal information therein, ensuring the continuity and integrity of data reception.

[0077] As an optional embodiment, after controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the other access point devices, it further includes: in the case where the link change identifier indicates a link connection and the target device includes the other access point devices, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the other access point devices, so that the other access point devices change the corresponding link parameters to the corresponding updated link parameters according to the target change signal.

[0078] In this embodiment, the specific steps of controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the other access point devices are described in the case where the link change identifier indicates a link connection and the target device includes the other access point devices.

[0079] In this step, when the target access point device is the access point device that connects to the terminal device after the link change, and the link change identifier indicates a link connection, the target device is the remaining access point devices. At this time, the link parameters of the target access point device are changed to the target link parameters, and the target change signal is sent to the remaining access point devices in the network. After receiving the target change signal, the remaining access point devices will change their corresponding link parameters to the updated link parameters according to the information in the signal, so as to ensure that all relevant devices in the network adapt to the new link state, thus ensuring the consistency of data transmission and no loops in the data transmission network.

[0080] Through this step, sending the target change signal to the remaining access point devices ensures that all relevant devices in the network uniformly adjust their link parameters, avoids data transmission problems caused by asynchronous parameter changes, and enhances the overall coordination and stability of the network.

[0081] As an optional embodiment, before determining the target change signal based on the target link parameters and the initial change signal, it further includes: when the target access point device has initial link parameters, determining the comparison result of whether the initial link parameters are the same as the target link parameters; when the comparison result is that the target link parameters are the same as the initial link parameters, discarding the initial change signal.

[0082] In this embodiment, the specific steps of discarding the initial change signal when the target link parameters are the same as the initial link parameters are described.

[0083] Among them, the initial link parameters are involved. The initial link parameters refer to the link parameters of the transmission link between the target access point device and the terminal device before receiving the link parameter change request.

[0084] Among them, the comparison result is involved. The comparison result refers to the result obtained by comparing the initial link parameters of the target access point device with the target link parameters. The comparison result is used to decide whether it is necessary to send the target change signal to the target access point device.

[0085] In this step, before sending the target change signal to the target access point device, first check whether there are initial link parameters in the data transmission link between the target access point device and the terminal device. If there are initial link parameters, compare the initial link parameters and the target link parameters. If the comparison result shows that the initial link parameters of the target access point device already meet the target link parameters expected by the network control device, that is, the two are the same, then the network control device will judge that it is unnecessary to send the initial change signal. Therefore, the network control device will choose to discard this initial change signal to avoid sending redundant signals to the target access point device that will not cause any actual parameter changes.

[0086] By this step, unnecessary change signals are avoided from being sent, the occupation of network bandwidth by signal transmission is reduced, and the processing burdens of the network control device and the access point device are lowered.

[0087] As an alternative embodiment, after sending a target change signal to a target device, it further includes: determining a feedback result of whether a response signal is received within a predetermined time, where the response signal is a signal fed back by the target device; in the case where the feedback result is that the response signal is not received within the predetermined time, determining a retry parameter, where the retry parameter includes a retry times threshold and a retry time interval; determining a retry change signal according to the target change signal; in the case where the number of times of sending the retry change signal is less than the retry times threshold, sending the retry change signal to the target device according to the retry time interval.

[0088] In this embodiment, the specific steps of sending a retry change signal to the target device are described.

[0089] Among them, a response signal is involved. The response signal refers to a confirmation signal fed back by the target device to the target access point device after receiving and processing the target change signal. The response signal includes an execution result of whether the target device has successfully executed the link parameter change.

[0090] Among them, a retry parameter is involved. The retry parameter refers to a parameter generated when the target access point device fails to receive the response signal of the target device within a predetermined time and is used to guide the target access point device on how to resend the target change signal.

[0091] Among them, a retry change signal is involved. The retry change signal refers to a change signal that is regenerated and sent to the target device when the target access point device fails to receive the response signal of the target device within a predetermined time.

[0092] Among them, a retry time interval is involved. The retry time interval refers to the waiting time between two times of sending the retry change signal by the target access point device.

[0093] Among them, a retry times threshold is involved. The retry times threshold refers to the maximum number of times set when sending the retry change signal.

[0094] In this step, after sending a target change signal to the target device to enable the target device to adjust its link parameters according to the signal content, the target access point device sets a predetermined time. If the response signal from the target device is successfully received within the predetermined time, indicating that the parameter change operation has been completed, the target access point device will end the change process. However, if no feedback signal from the target device is received within the predetermined time, the target access point device will assume that the target device may have failed to process or execute the change signal, and at this time, it will enter the retry process. First, retry parameters are determined, including the retry count threshold and the retry time interval. The retry count threshold sets the maximum number of times the target access point device can resend the target change signal, while the retry time interval defines the waiting time between two retry signals. The target access point device generates a retry change signal and, when the retry count is less than the threshold, resends the retry change signal to the target device according to the retry time interval.

[0095] Through this step, a retry mechanism is set up, and the target access point device can ensure that the target device successfully receives and executes the parameter change, avoiding change failures caused by network interference, device failures, etc. By setting the retry count threshold, waste of network resources caused by infinite retries can be avoided. At the same time, by setting an appropriate retry time interval, network congestion can be reduced and signal transmission efficiency can be improved.

[0096] Based on the above embodiments and optional embodiments, an optional implementation manner is provided, which is specifically described below.

[0097] In the related art, a seamless roaming method for MLD devices is proposed, enabling a non-access point device (non-AP MLD device, the same as the above terminal device) to maintain an association with both the current access point device (current AP MLD device) and the target access point device (target AP MLD device) during roaming. In this way, during roaming, there is at least one communicable link between the non-AP MLD and the current AP MLD device, and the two interact with the current downlink data traffic cached by the current AP MLD device through this link until the cached traffic is sent out.

[0098] The MLD seamless roaming technology performs roaming between access points through the MLO roaming method. During roaming, the old connection and the new connection can coexist and maintain data communication. The old data in the buffer on the link does not need to be redirected and can be sent to the roaming site through the old link. The newly generated data is forwarded to the roaming site through the new link. Until the old data is transmitted, the old connection can be disconnected to complete the roaming process. MLO roaming can more conveniently solve the problem of forwarding existing data on the link and avoid packet loss during the roaming process.

[0099] Figure 2 It is a schematic diagram of the seamless roaming technology provided by an alternative embodiment of the present invention. As Figure 2 shown, when there are more than two AP MLD devices and non-AP MLD devices in the same local area network and the above MLD seamless roaming operation is performed, for access point devices (AP MLD devices) other than the current AP MLD device and the target AP MLD device, there may be two reachable data transmission paths between them and the non-AP MLD device. Figure 3 It is a connection diagram of data transmission network devices provided by an alternative embodiment of the present invention. As Figure 3 shown, there are four AP MLD devices and one non-AP MLD device in this mesh network. AP MLD device 3 is the current AP MLD device, and AP MLD device 4 is the target AP MLD device; when the non-AP MLD device is in the seamless roaming state, there will be two downlink data forwarding paths for AP MLD device 2. In order to ensure that the non-AP MLD device can complete the roaming operation more quickly and stably, special data forwarding rules need to be specified for each device to select the transmission path and better cooperate with the terminal roaming operation.

[0100] In view of this, an alternative embodiment of the present invention provides a forwarding address update mechanism for MLD seamless roaming: when the non-AP MLD device is in the intermediate state of MLD seamless roaming, the target AP MLD device will send a forwarding address update signal to other AP MLD devices in the current local area network. The device that receives this signal will update the forwarding address according to its own association state and decide whether to continue forwarding the update signal. It can provide a notification and announcement method for the forwarding address information and data cache status of devices performing multi-link seamless roaming in the mesh network. At the same time, based on the design and use of specific multicast frames, loop communication control is achieved, and information notification and interaction are completed more accurately.

[0101] Through this solution, it is possible to accurately determine that the old data on the link has been forwarded, accurately determine the timing of the disconnection of the old connection; and ensure that the newly generated data is forwarded from the new link to the roaming site, so that the data on the old link only decreases and does not increase, optimizing the MLD roaming operation.

[0102] The following specifically introduces the specific content of the forwarding address update mechanism for seamless roaming provided in the alternative embodiment of the present invention:

[0103] S1. Receive a link parameter change request.

[0104] Taking the target access point device as the target AP MLD device and the target device as the current AP MLD device (the same as the other access point devices mentioned above) as an example:

[0105] After the non-AP MLD device establishes a new data transmission link (new link) through MLD seamless roaming operation and enters the intermediate state, it needs to immediately send a specific signal (the same as the initial change signal mentioned above, M1) to the target AP MLD device. The source address of M1 is the device address (mac address) of the non-AP MLD device, denoted as sta-mac.

[0106] It should be noted that M1 can be a multicast packet or a broadcast packet, which contains a flag indicating its information type, such as a specific multicast address or a specific flag field.

[0107] S2. In response to the link parameter change request, determine the target link parameters corresponding to the target access point device according to the device address and the link change identifier.

[0108] After receiving the M1 signal, the target AP MLD device needs to determine whether there is a forwarding rule corresponding to the terminal device (the forwarding rule of sta-mac). If there is no forwarding rule for sta-mac, it needs to establish a forwarding rule for sta-mac. If there is a forwarding rule for sta-mac, it needs to judge between the old rule and the new rule to determine the target link parameters corresponding to the target access point device.

[0109] S3. Determine the target change signal according to the target link parameters and the initial change signal.

[0110] Determine the target change signal (M1' signal) according to the determined target link parameters.

[0111] S4. Control the link parameters corresponding to the target access point device to be changed to the target link parameters, and send the target change signal to the target device.

[0112] Figure 4 It is the flowchart of the method for the target device to determine link parameters provided by an optional embodiment of the present invention. As Figure 4 shown, after receiving the target change signal, the target device needs to update its forwarding table according to the following rules based on M1':

[0113] a) There is no forwarding rule for sta-mac: Establish a forwarding rule for sta-mac and continue to forward M1'.

[0114] b) There is a forwarding rule for sta-mac and the old and new rules are different. Then the device continues to forward M1' and optionally:

[0115] i. Terminate the old forwarding rule and use the new forwarding rule to send all cached data;

[0116] ii. Keep both forwarding rules simultaneously. Forward the data in the current buffer that is difficult to redirect according to the old rule until the sending of this part of the cached data is completed and the old forwarding rule is terminated. Forward the redirectable data in the current buffer and the subsequent incoming data according to the new rule;

[0117] c) There is a forwarding rule for sta-mac and the new and old rules are the same, terminate forwarding M1'.

[0118] In addition, in a mesh network, during the process of each AP MLD device updating its address, it is necessary to forward the M1' information according to the following rules based on its own cached data status.

[0119] Taking the target access point device as the current AP MLD device and the target device as the non-AP MLD device as an example, the content of the forwarding rule for cached data is specifically introduced below.

[0120] When the target access point device has a forwarding rule for sta-mac and the new and old rules are different, before the target access point device forwards M1, it is necessary to ensure that all the old data in the buffer is forwarded.

[0121] If the data in the buffer of the target access point device is forwarded sequentially, M1' is sent after all the current cached data in a first-in, first-out (fifo) manner.

[0122] If the target access point device has n qos sending queues, then copy M1' n times according to the number of queues, denoted as M1.1' to M1.n'. Each M1.x' needs to contain the information of "the current xth, a total of n". Insert M1.1' to M1.n' at the end of each qos sending queue respectively, and then send each sending queue in a fifo manner and ensure that M1.x' is sent last.

[0123] It should be noted that the flag for the target access point device to receive M1 is receiving M1 or all of M1.1 to M1.n. After receiving M1.1 to M1.n, it can fill its respective qos queues with the existing split M1.1' to M1.n', or merge M1.1 to M1.n into M1 and then generate M1' and send it again after all the current cached data in a first-in, first-out (fifo) manner. The above qos queues are the qos queues at the final exit of sta-mac pointed to by the old forwarding rule in this device.

[0124] During the execution of the above address update process, the non-AP MLD device needs to additionally comply with the following processing mechanism:

[0125] After the non-AP MLD sends M1 through the new link, it needs to wait for the arrival of M1' on the old data transmission link (old link). When M1' is received forwarded back on the old link, it is considered that the cached data of the entire link has been forwarded, and the old link is disconnected to complete the roaming process.

[0126] It should be noted that Figure 5 is the flowchart of the target change signal retransmission mechanism provided by the optional embodiment of the present invention. As Figure 5 shown, the non-AP MLD will set a waiting timeout period t. If M1' has not been received on the old link after M1 is sent on the new link and after the waiting time t, then M1' needs to be retransmitted on the new link, and continue to wait for M1' on the old link. If the maximum number of retransmissions R is reached, and M1' has not been received on the old link after the waiting time t after the Rth retransmission, then it is considered that the transmission of M1 fails. The actions after failure can be to disconnect the old link, keep the new link, and complete the roaming process; or disconnect the new link, keep the old link, and abandon this roaming operation.

[0127] The optional embodiment of the present invention also provides three examples of forwarding cached data during the seamless roaming handover process, namely forwarding cached data according to the new rules, forwarding cached data according to the old rules, and forwarding cached data in the form of multiple queues. The following specifically introduces the forwarding content.

[0128] A1. Forward cached data according to the new rules.

[0129] If the current AP MLD device has the condition for redirecting the buffer data, the cached data can be sent through the new link with better communication quality by means of redirection to ensure the efficiency of data transmission.

[0130] The non-AP MLD device maintains two connections during the roaming transition period. It sends a multicast packet with an obvious flag on the new link, which should include its own identity (such as the mac address) and the type of the packet. After receiving the multicast packet information of the non-AP MLD device, the AP MLD device 4 finds that it currently has no forwarding rule for the non-AP MLD device, then establishes the forwarding rule for this terminal and continues to forward the M1 information.

[0131] Figure 6 is the flowchart of a method for forwarding cached data provided by the optional embodiment of the present invention. As Figure 6As shown, after the APMLD device 2 receives the M1 information from the AP MLD device 4 and discovers that the new forwarding rule conflicts with the old forwarding rule, the APMLD device 2 will terminate the old forwarding rule. When the AP MLD device 2 sends the old cached data S2 and the new cached data S3, it will directly send them to the AP MLD device 4 according to the new forwarding rule, and finally forward them to the non-APMLD device via the AP MLD device 4.

[0132] A2. Forward the cached data according to the old rule.

[0133] It is difficult to redirect the data in the buffer of the current AP MLD device. The data in the buffer can be transmitted through the old link to ensure that the data in the buffer of the device without redirection ability is not discarded and no packet loss occurs.

[0134] The non-AP MLD device maintains two connections during the roaming transition period. It sends a multicast packet with an obvious flag on the new link, which should include its own identity (such as the mac address) and the type of the packet. After the AP MLD device 4 receives the multicast packet information from the non-AP MLD device and discovers that it currently has no forwarding rule for the non-AP MLD device, it will establish the forwarding rule for this terminal and continue to forward the M1 information.

[0135] Figure 7 It is another flowchart of the cached data forwarding method provided by an alternative embodiment of the present invention. As Figure 7 shown, after the AP MLD device 2 receives the multicast signal M1 forwarded by the AP MLD device 4 and discovers that the new forwarding rule conflicts with the old forwarding rule, the AP MLD device 2 will process the existing cached data according to the old forwarding rule. For example, the AP MLD device 2 will still forward the existing cached data S2 to the AP MLD device 3 according to the old forwarding rule, and finally forward it to the non-AP MLD device by the AP MLD device 3. The data arriving after that will be forwarded according to the new forwarding rule.

[0136] After the AP MLD device 2 completes the forwarding of the old cached data S2, it continues to forward M1' and is regarded as terminating the old forwarding rule. After the AP MLD device 3 receives M1, it will consider that the AP MLD device 2 no longer has cached data. After sending its own cached data, it will also forward M1 to the non-AP MLD device to inform the terminal that the current cached data has been sent.

[0137] After the AP MLD device 2 forwards M1', the subsequent cached data S3 will be sent to the AP MLD device 4 according to the new forwarding rule, and finally sent by the AP MLD device 4 to the non-AP MLD device.

[0138] A3. Forward the cached data in the form of multiple queues.

[0139] When there are multiple qos queues at the device forwarding outlet, split M1' into multiple messages, and each message enters a different qos queue to ensure that there is an obvious identification message when the buffered data in each qos queue is sent, so that the next-level device can accurately judge whether all the buffer data has been forwarded.

[0140] Figure 8 It is another flowchart of the cached data forwarding method provided by the optional embodiment of the present invention. As Figure 8 shown, when the AP MLD device 3 receives M1 forwarded by the AP MLD device 2, it decides to forward the buffered data S2 using the old rule. In the old forwarding rule, the forwarding outlet of the sta-mac of this device is Wi-Fi, and there are 4 qos forwarding queues in Wi-Fi. At this time, split M1' into M1.1' to M1.4', and indicate the current xth out of a total of 4 in each M1.x'. For example, in M1.2', it is marked as the current 2nd out of a total of 4. Then, put M1.1' to M1.4' into the tails of 4 qos queues for forwarding respectively. When the non-AP MLD device receives all 4 M1s of M1.1' to M1.4', it considers that M1 has been received, indicating that the buffered data of the AP MLD device 3 has been sent, and the old link can be disconnected and the roaming process can be completed.

[0141] Through the above optional embodiments, at least the following beneficial effects can be achieved:

[0142] (1) Use the identification multicast packet M1 to notify all multi-link devices in the network of the roaming requirements and specific roaming paths of the terminal, which can provide better roaming services for the terminal;

[0143] (2) Based on the identification multicast packet M1, the full-link judgment of the network loopback is realized, and it is possible to more accurately confirm whether the buffered data has been sent;

[0144] (3) When there are multiple qos queues in the device, copy M1 into multiple ones to provide a judgment basis for the completion of the buffered data sending in each qos queue.

[0145] It should be noted that, for the foregoing method embodiments, for the sake of simple description, they are all expressed as a series of action combinations. However, those skilled in the art should know that the present invention is not limited by the described action sequence, because according to the present invention, certain steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0146] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be implemented by means of software plus a necessary general hardware platform. Of course, it can also be implemented by hardware, but in many cases the former is a better implementation method. Based on such an understanding, the technical solution of the present invention, in essence or the part that makes a contribution to the prior art, can be embodied in the form of a software product. The computer software product is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes several instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods of the various embodiments of the present invention.

[0147] Embodiment 2

[0148] According to an embodiment of the present invention, there is also provided a system for implementing the above-mentioned link parameter change method, including: a target access point device, a target device, wherein the target device includes at least one of the following: a terminal device, other access point devices. The target access point device is configured to receive a link parameter change request, wherein the link parameter change request carries an initial change signal, and the initial change signal includes the device address of the terminal device and a link change identifier; in response to the link parameter change request, determine a target link parameter corresponding to the target access point device according to the device address and the link change identifier, wherein the target link parameter is used to determine the data transmission direction in the target access point device; determine a target change signal according to the target link parameter and the initial change signal; control the link parameter corresponding to the target access point device to be changed to the target link parameter, and send the target change signal to the target device.

[0149] As an optional embodiment, when the target device is a terminal device, the terminal device determines whether the change result of the full link parameter change is completed in the system according to the target change signal; and / or, when the target device is other access point devices, the other access point devices change the corresponding link parameter to the corresponding updated link parameter according to the target change signal.

[0150] It should be noted here that the above system corresponds to steps S102 to S108 in the method for changing link parameters. The instances and application scenarios implemented by multiple modules and the corresponding steps are the same, but are not limited to the content disclosed in the above-mentioned Embodiment 1.

[0151] Embodiment 3

[0152] According to another aspect of the embodiments of the present invention, an electronic device is further provided, including: a processor; a memory for storing processor-executable instructions, wherein the processor is configured to execute the instructions to implement the link parameter change method of any one of the above.

[0153] Embodiment 4

[0154] According to another aspect of the embodiments of the present invention, a computer-readable storage medium is further provided. When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device can execute the link parameter change method of any one of the above.

[0155] Embodiment 5

[0156] According to another aspect of the embodiments of the present invention, a computer program product is further provided, including a computer program. When the computer program is executed by a processor, the link parameter change method of any one of the above can be implemented.

[0157] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0158] In the above embodiments of the present invention, the descriptions of each embodiment have their own emphases. For the parts not detailed in a certain embodiment, reference may be made to the relevant descriptions of other embodiments.

[0159] In the several embodiments provided in the present application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only illustrative. For example, the division of the units can be a logical function division. In actual implementation, there can be other division methods. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the displayed or discussed mutual coupling or direct coupling or communication connection can be through some interfaces. The indirect coupling or communication connection of units or modules can be in an electrical or other form.

[0160] The units described as separate components may or may not be physically separated. The components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed to multiple units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0161] In addition, each functional unit in various embodiments of the present invention may be integrated into a processing unit, may exist physically alone for each unit, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of a software functional unit.

[0162] If the above-mentioned integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium. Based on such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, may be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, read-only memories (ROMs), random access memories (RAMs), mobile hard disks, magnetic disks, or optical discs that can store program codes.

[0163] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A method for changing link parameters, characterized in that, Including: Receiving a link parameter change request, where an initial change signal is carried in the link parameter change request, and the initial change signal includes a device address of a terminal device and a link change identifier; In response to the link parameter change request, determining target link parameters corresponding to a target access point device according to the device address and the link change identifier, where the target link parameters are used to determine a data transmission flow direction in the target access point device; Determining a target change signal according to the target link parameters and the initial change signal; Controlling the link parameters corresponding to the target access point device to be changed to the target link parameters, and sending the target change signal to a target device, where the target device includes at least one of the following: the terminal device, other access point devices, and the other access point devices are access point devices communicatively connected to the target access point device.

2. The method according to claim 1, wherein The controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to the target device includes: When the link change identifier indicates a link disconnection and the target device includes the terminal device, determining a transmission data result of whether the target access point device is transmitting data to the terminal device; When the transmission data result is that the target access point device is transmitting data to the terminal device, acquiring data to be transmitted; Combining the data to be transmitted and the target change signal to obtain combined data; After sending the combined data to the terminal device, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters, and enabling the terminal device to determine a change result of whether full-link parameter change is completed in the system according to the target change signal.

3. The method according to claim 2, wherein The combining the data to be transmitted and the target change signal to obtain combined data includes: When the data to be transmitted is transmitted in a form of multiple queues, determining sub-transmission data corresponding to the multiple queues respectively; Determining sub-change signals corresponding to the multiple queues respectively according to the target change signal; Respectively combining the corresponding sub-transmission data and the corresponding sub-change signals to obtain multiple sub-combined data; After sending the multiple sub-combined data to the terminal device, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters.

4. The method according to claim 1, wherein After the controlling the link parameters corresponding to the target access point device to be changed to the target link parameters and sending the target change signal to other access point devices, further including: When the link change identifier indicates a link connection and the target device includes the other access point devices, controlling the link parameters corresponding to the target access point device to be changed to the target link parameters, and sending the target change signal to the other access point devices, so that the other access point devices change corresponding link parameters to corresponding updated link parameters according to the target change signal.

5. The method according to claim 1, wherein Before the determining the target change signal according to the target link parameters and the initial change signal, further including: When there are initial link parameters in the target access point device, determine the comparison result of whether the initial link parameters are the same as the target link parameters; When the comparison result is that the target link parameters are the same as the initial link parameters, discard the initial change signal.

6. The method according to any one of claims 1 to 5, characterized in that, After sending the target change signal to the target device, it further includes: Determine the feedback result of whether a response signal is received within a predetermined time, where the response signal is a signal fed back by the target device; When the feedback result is that the response signal is not received within the predetermined time, determine the retry parameters, where the retry parameters include a retry count threshold and a retry time interval; Determine a retry change signal according to the target change signal; When the number of transmissions of the retry change signal is less than the retry count threshold, send the retry change signal to the target device according to the retry time interval.

7. A link parameter change system, characterized in that, It includes: A target access point device, a target device, where the target device includes at least one of the following: a terminal device, other access point devices, The target access point device is used to receive a link parameter change request, where the link parameter change request carries an initial change signal, and the initial change signal includes the device address of the terminal device and a link change identifier; in response to the link parameter change request, determine the target link parameters corresponding to the target access point device according to the device address and the link change identifier, where the target link parameters are used to determine the data transmission direction in the target access point device; determine a target change signal according to the target link parameters and the initial change signal; control the link parameters corresponding to the target access point device to be changed to the target link parameters, and send the target change signal to the target device.

8. The system according to claim 7, wherein When the target device is the terminal device, the terminal device determines the change result of whether the full-link parameter change is completed in the system according to the target change signal; And / or When the target device is the other access point devices, the other access point devices change the corresponding link parameters to the corresponding updated link parameters according to the target change signal.

9. An electronic device, characterized in that, It includes: A processor; A memory for storing executable instructions of the processor; Wherein, the processor is configured to execute the instructions to implement the link parameter change method according to any one of claims 1 to 6.

10. A computer-readable storage medium, characterized in that, When the instructions in the computer-readable storage medium are executed by the processor of the electronic device, the electronic device can execute the link parameter change method according to any one of claims 1 to 6.

11. A computer program product, comprising a computer program, characterized in that, The computer program, when executed by the processor, implements the steps of the method according to any one of claims 1 to 6.

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