CN113055911B - Wireless cascading method - Google Patents
Wireless cascading method Download PDFInfo
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- CN113055911B CN113055911B CN202110260883.XA CN202110260883A CN113055911B CN 113055911 B CN113055911 B CN 113055911B CN 202110260883 A CN202110260883 A CN 202110260883A CN 113055911 B CN113055911 B CN 113055911B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/12—Communication route or path selection, e.g. power-based or shortest path routing based on transmission quality or channel quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/02—Communication route or path selection, e.g. power-based or shortest path routing
- H04W40/22—Communication route or path selection, e.g. power-based or shortest path routing using selective relaying for reaching a BTS [Base Transceiver Station] or an access point
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to the technical field of wireless connection, in particular to a wireless cascade method, which comprises the steps that AP equipment is connected with each node equipment, and is switched into a relay mode according to signal intensity, and the node equipment is used as a relay; in the relay mode, each node device selects the node device which is idle in the connection range and has the strongest network signal strength as a relay according to the current network signal strength, and each node device can automatically calculate the current cascade number and dynamically adjust the connected node devices, so that long-distance signal transmission is realized, the transmission is stable, and the delay is low.
Description
Technical Field
The invention relates to the technical field of wireless connection, in particular to a wireless cascading method.
Background
The term "wireless connection" refers to establishing a communication link between devices by using wireless technologies such as WIFI and 4G, and providing a basis for data communication between the devices, and is also referred to as wireless link.
At present, wireless WIFI (wireless fidelity) single-Point transmission has the problem of short transmission distance, wireless signals are transmitted in the air through electromagnetic waves, obstacles between AP (Access Point) equipment and a terminal can cause great attenuation to signal transmission, such as partition walls, baffles, furniture and the like, more obstacles pass through, the signals are weaker, and therefore the wireless signals are easily blocked, the transmission distance is limited, the wireless signals cannot be stably transmitted in long-distance transmission, and the delay is high.
Disclosure of Invention
The invention aims to provide a wireless cascade method with stable signal transmission and low delay, so as to solve the technical problems of unstable signal transmission and high delay in long-distance transmission.
The present invention provides the following basic scheme: a wireless cascade method is applied to the connection of AP equipment and a plurality of node equipment, and comprises the following contents:
starting AP equipment, connecting each node equipment, and automatically synchronizing wireless network configuration information of each node equipment, wherein the wireless network configuration information comprises an MAC address of the node equipment and node equipment cascade state information;
each node device uploads the current wireless network signal intensity and synchronizes the current network signal intensities of other nodes;
the AP equipment contacts and updates the network signal strength of the node equipment through a timeout mechanism;
the AP equipment dynamically switches the relay mode of the node equipment according to the network signal intensity of each current node equipment;
in the relay mode, each node device selects a node device which is idle in a connection range and has the strongest network signal strength as a relay according to the current network signal strength;
each node device automatically calculates the current cascade quantity, and dynamically adjusts the connected node devices.
Compared with the prior art, the invention has the advantages that: 1. the AP equipment is connected with each node equipment, automatically synchronizes the wireless network configuration information of each node, uploads the current wireless network signal intensity and synchronizes the current network signal intensity of other nodes to prepare for a subsequent relay mode, and contacts and updates the network signal intensity of the node equipment through a timeout mechanism instead of being updated all the time so as to reduce the occupation of signal channel resources and not influence the normal transmission of signals between the AP equipment and the node equipment.
2. The AP equipment dynamically switches the relay mode of the node equipment according to the network signal strength of each current node equipment, if the AP equipment can meet the connection and transmission requirements of each node equipment, the node equipment can be directly connected with the AP equipment without starting the relay mode, but when the AP equipment cannot meet the connection and transmission requirements of each node equipment, the relay mode of the node equipment is dynamically switched to prevent the node equipment from generating the conditions of unstable transmission and high delay.
3. In the relay mode, each node device selects the node device which is idle in the connection range and has the strongest network signal strength as a relay according to the current network signal strength, so that the burden of AP (access point) devices is relieved, the transmission pressure of the node device is prevented from being caused by too many node devices connected by one node device, and each node device in the networking in the relay mode can perform transparent transmission through other node devices, so that the long-distance signal transmission is realized, each node device automatically calculates the current cascade number, dynamically adjusts the connected node devices, ensures the stability of the long-distance transmission and reduces the delay.
Further, the node device has a function of simultaneously transceiving wireless signals, and can be connected by wire or wirelessly.
Has the advantages that: the node equipment has the function of simultaneously receiving and transmitting wireless signals, so that the node equipment can be used as a relay without influencing the strength of network signals, has stable transmission and does not generate delay due to the fact that the receiving and the transmitting are not simultaneous.
Further, the timeout mechanism is that the node device loses contact with the AP device within a preset time, that is, a packet loss rate of network transmission between the AP device and the node device is 100%.
Has the advantages that: when the packet loss rate of network transmission between the AP device and the node device is 100%, it is considered that the node device loses contact with the AP device, and the problem between transmissions of the AP device and the node device is detected in time within a reasonable range, and the node device is not updated all the time, so as to reduce occupation of signal channel resources and not affect normal transmission of signals between the AP device and the node device.
Further, the dynamically switching the relay mode of the node device by the AP device according to the network signal strength of each current node device includes:
the AP equipment detects the network signal intensity of each node equipment which is connected currently;
and judging whether the network signal intensity of each node device is lower than the preset network signal intensity, and if so, switching the node device to be in a relay mode.
Has the advantages that: the AP equipment judges whether the network signal strength of each node equipment is lower than the preset network signal strength, if so, the node equipment is switched to be in a relay mode, and the node equipment is prevented from being incapable of transmitting signals due to low network signal strength.
Further, the automatically calculating the current cascade number by each node device and dynamically adjusting the connected node devices includes:
each node device automatically calculates the current cascade number;
and calculating the average bandwidth of the cascaded node equipment according to the maximum bandwidth which can be actually transmitted and the current cascade quantity, and if the average bandwidth is smaller than the preset bandwidth, dynamically adjusting the cascaded node equipment.
Has the advantages that: each node device is used as a relay, and the capability of the node device as the relay is also evaluated in a rational manner, that is, the average bandwidth of the cascaded node devices is calculated according to the maximum bandwidth which can be actually transmitted and the current cascade quantity, if the average bandwidth is smaller than the preset bandwidth, the cascaded node devices are dynamically adjusted, and network congestion caused by the fact that one node device is used as the relay of too many node devices to simultaneously transmit multi-path data is prevented.
Further, a network device management module is disposed in the AP device, and the network device management module is configured to maintain and manage wireless network configuration information of each node device.
Has the advantages that: the AP equipment is provided with a network equipment management module for maintaining and managing the wireless network configuration information of each node equipment, so that a user can maintain and manage the wireless network configuration information of each node equipment conveniently.
Further, the AP device further comprises a weight setting module and an adjusting module;
the weight setting module is used for setting the weight value of the connected node equipment;
and the adjusting module is used for adjusting the preset time according to the weight value of the node equipment.
Has the advantages that: the node equipment is different in setting position and importance degree, different weighted values are given to the connected node equipment, the adjusting module adjusts the preset time according to the weighted values of the node equipment, the preset time of the node equipment in the important position is short, and the preset time of the node equipment in the important position is not required to be long, so that the connection of the node equipment in the important position is ensured.
Further, the adjusting module is further configured to adjust the preset network signal strength according to the weight value of the node device.
Has the advantages that: different node equipment has different requirements on network signal strength, and the preset network signal strength of the node equipment is set according to the weight value of the node equipment, so that the network signal strength requirements of different node equipment can be better met, and each node equipment can be switched to a relay mode in time.
Further, the AP device further includes a judgment forced adjustment module;
the adjusting module is further configured to set a lowest network signal strength of the node device according to the weight value of the node device;
and the forced adjustment module is used for judging whether the network signal intensity of the current node equipment is lower than the lowest network signal intensity or not, and if so, dynamically switching the relay mode of the node equipment.
Has the advantages that: the forced adjusting module does not need to wait for the AP equipment to contact and update the network signal strength of the node equipment through an overtime mechanism, but sets the lowest network signal strength of the node equipment according to the weighted value of the node equipment to judge whether the network signal strength of the current node equipment is lower than the lowest network signal strength or not, if the network signal strength of the current node equipment is lower than the lowest network signal strength, the relay mode of the node equipment is dynamically switched, and therefore the occurrence of disconnection between the AP equipment and the node equipment is reduced.
Drawings
Fig. 1 is a flowchart of an embodiment of a wireless concatenation method of the present invention;
fig. 2 is a schematic diagram of a wireless cascading method according to an embodiment of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
example one
This embodiment is substantially as shown in figure 1: a wireless cascade method adopts a standard WIFI protocol, is applied to the connection of AP equipment and a plurality of node equipment, and comprises the following contents:
the AP equipment is started, connected with each node equipment, and wireless network configuration information of each node equipment is automatically synchronized, the wireless network configuration information comprises an MAC address of the node equipment and node equipment cascade state information, the node equipment has the function of simultaneously receiving and transmitting wireless signals and can be connected in a wired or wireless mode, a network equipment management module is arranged in the AP equipment and used for maintaining and managing the wireless network configuration information of each node equipment.
Each node device uploads the current wireless network signal strength and synchronizes the current network signal strengths of other nodes.
The AP equipment contacts and updates the network signal strength of the node equipment through a timeout mechanism, wherein the timeout mechanism means that the node equipment loses contact with the AP equipment within preset time, namely the packet loss rate of network transmission between the AP equipment and the node equipment is 100%.
The method for dynamically switching the relay mode of the node device by the AP device according to the network signal strength of each current node device includes:
the AP equipment detects the network signal intensity of each node equipment which is connected currently;
and judging whether the network signal intensity of each node device is lower than the preset network signal intensity, and if so, switching the node device to be in a relay mode.
In the relay mode, each node device selects a node device which is idle in a connection range and has the strongest network signal strength as a relay according to the current network signal strength;
each node device automatically calculates the current cascade quantity, and dynamically adjusts the connected node devices, including:
each node device automatically calculates the current cascade quantity;
and calculating the average bandwidth of the cascaded node equipment according to the maximum bandwidth which can be actually transmitted and the current cascade quantity, and if the average bandwidth is smaller than the preset bandwidth, dynamically adjusting the cascaded node equipment.
The specific implementation process is as follows: in this embodiment, 1 AP device, referred to as AP1 for short, and 5 routers with simultaneous transceiving functions are used as node devices, referred to as node 1, node 2, node 3, node 4, and node 5 for short, respectively, where the preset network signal strength is-70 dBm, the preset bandwidth is 2M, and the preset time is 10s.
As shown in fig. 2, the AP1 is started, the node 1, the node 2, the node 3, the node 4, and the node 5 are connected, and the wireless network configuration information of each node device is automatically synchronized; each node device uploads the current wireless network signal intensity and synchronizes the current network signal intensities of other nodes; if the packet loss rate of the AP1 and the nodes 1 and 2 is 100% in 10s, detecting that the network signal intensity of the currently connected nodes 1 and 2 is lower than-70 dBm, and switching the nodes 1 and 2 to a relay mode; the node 1 and the node 2 select the node device which is idle in the connection range and has the strongest network signal strength as the relay according to the current network signal strength, in the embodiment, the node device which is idle in the connection range and has the strongest network signal strength is the node 3, so the node 1 and the node 2 are connected with the node 3, and the node 1 and the node 2 are connected back to the AP through the node 3; the node 3 automatically calculates the current cascade number to be 2, calculates the average bandwidth of the cascade node devices to be 1.5M according to the maximum actually transmittable bandwidth being 3M and the current cascade number being 2, and calculates the average bandwidth of the cascade node devices to be less than the preset bandwidth 2M, then dynamically adjusts the cascade node 2, and allocates the node 2 to the node device node 4 which is idle in the connection range and has the second highest network signal strength, so that the finished networking signal transmission is stable and has low delay.
Carry out two
Compared with the first embodiment, the present embodiment is different in that: the AP equipment further comprises a weight setting module and an adjusting module;
the weight setting module is used for setting the weight value of the connected node equipment; a larger number of weight values represents a heavier weight.
And the adjusting module is used for adjusting the preset time and the preset network signal intensity according to the weight value of the node equipment. The node device with the larger weight value is connected with the AP device for a shorter preset time and with higher preset network signal strength.
The specific implementation process is as follows: NVR is used as AP equipment, IPC is used as node equipment, wherein the IPC is provided with three: IPC1, IPC2 and IPC3 are respectively arranged in different monitoring areas, wherein the area monitored by IPC1 is the most important, IPC2 is the second, IPC3 is the last, the weight values of IPC1, IPC2 and IPC3 are respectively set from high to low through the weight setting module, the adjusting module respectively adjusts the preset time from short to long according to the weight values of IPC1, IPC2 and IPC3, and the adjusting module respectively adjusts the preset network signal intensity from strong to weak according to the weight values of IPC1, IPC2 and IPC3, so that different requirements of different node devices can be better adapted according to different positions and different importance degrees set by IPC, and the connection of the node devices arranged in important positions is guaranteed.
EXAMPLE III
Compared with the two embodiments, the present embodiment is different in that: the AP equipment also comprises a judgment forced adjustment module;
the adjusting module is further used for setting the lowest network signal strength of the node equipment according to the weight value of the node equipment;
and the forced adjustment module is used for judging whether the network signal intensity of the current node equipment is lower than the lowest network signal intensity or not, and if so, dynamically switching the relay mode of the node equipment.
The specific implementation process is as follows: NVR is used as AP equipment, IPC is used as node equipment, wherein the IPC is provided with three: IPC1, IPC2 and IPC3 are respectively arranged in different monitoring areas, wherein the area monitored by IPC1 is the most important, IPC2 is the second, IPC3 is the last, the weight values of IPC1, IPC2 and IPC3 are respectively set from high to low through a weight setting module, a regulating module sets the lowest network signal strength of IPC1, IPC2 and IPC3 from strong to weak according to the weight value of the node equipment, and the lowest network signal strength of IPC1 is not lower than the preset network signal strength, so that when the current network signal strength of IPC1 is lower than the preset network signal strength, NVR can dynamically switch the relay mode of the node equipment, the IPC1 can transmit the monitoring video to NVR all the time, and the area monitored by IPC1 is ensured to be in a monitored state all the time.
The foregoing are embodiments of the present invention and are not intended to limit the scope of the invention to the particular forms set forth in the specification, which are set forth in the claims below, but rather are to be construed as the full breadth and scope of the claims, as defined by the appended claims, as defined in the appended claims, in order to provide a thorough understanding of the present invention. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several variations and modifications can be made, which should also be considered as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the utility of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (8)
1. A wireless cascading method, characterized in that: the method is applied to the connection between the AP equipment and the plurality of node equipment, and comprises the following contents:
starting AP equipment, connecting each node equipment, and automatically synchronizing wireless network configuration information of each node equipment, wherein the wireless network configuration information comprises an MAC address of the node equipment and node equipment cascade state information;
each node device uploads the current wireless network signal intensity and synchronizes the current network signal intensities of other nodes;
the AP equipment contacts and updates the network signal strength of the node equipment through a timeout mechanism; the timeout mechanism is that the node equipment loses contact with the AP equipment within preset time, and the AP equipment comprises a weight setting module and an adjusting module; the weight setting module is used for setting the weight value of the connected node equipment; the adjusting module is used for adjusting the preset time according to the weight value of the node equipment;
the AP equipment dynamically switches the relay mode of the node equipment according to the network signal intensity of each current node equipment;
in the relay mode, each node device selects a node device which is idle in a connection range and has the strongest network signal strength as a relay according to the current network signal strength;
each node device automatically calculates the current cascade quantity and dynamically adjusts the connected node devices.
2. The wireless cascading method of claim 1, wherein: the node equipment has the function of simultaneously receiving and transmitting wireless signals and can be connected in a wired or wireless mode.
3. The wireless concatenation method of claim 1, wherein: the node device loses connection with the AP device within a preset time as follows: the packet loss rate of network transmission between the AP device and the node device is 100%.
4. The wireless cascading method of claim 1, wherein: the AP equipment dynamically switches the relay mode of the node equipment according to the network signal strength of each current node equipment, and the method comprises the following steps:
the AP equipment detects the network signal intensity of each node equipment which is connected currently;
and judging whether the network signal intensity of each node device is lower than the preset network signal intensity, and if so, switching the node device to be in a relay mode.
5. The wireless cascading method of claim 1, wherein: each node device automatically calculates the current cascade quantity, and dynamically adjusts the connected node devices, including:
each node device automatically calculates the current cascade number;
and calculating the average bandwidth of the cascaded node equipment according to the maximum bandwidth which can be actually transmitted and the current cascade quantity, and if the average bandwidth is smaller than the preset bandwidth, dynamically adjusting the cascaded node equipment.
6. The wireless cascading method of claim 1, wherein: the AP equipment is provided with a network equipment management module, and the network equipment management module is used for maintaining and managing wireless network configuration information of each node equipment.
7. The wireless cascading method of claim 1, wherein:
the adjusting module is further configured to adjust the preset network signal strength according to the weight value of the node device.
8. The wireless concatenation method of claim 1, wherein: the AP equipment also comprises a judgment forced adjustment module;
the adjusting module is further used for setting the lowest network signal strength of the node equipment according to the weight value of the node equipment;
and the forced adjusting module is used for judging whether the network signal intensity of the current node equipment is lower than the lowest network signal intensity or not, and if the network signal intensity is lower than the lowest network signal intensity, dynamically switching the relay mode of the node equipment.
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| CN112383889B (en) * | 2020-11-09 | 2023-08-18 | 哈尔滨工业大学 | Efficient dynamic network transfer and load balancing method based on self-organizing network |
| CN114443555B (en) * | 2022-01-27 | 2024-01-30 | 合肥甘尧电子科技有限公司 | Automatic detection method for cascade quantity of serial buses |
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| US7492787B2 (en) * | 2002-03-29 | 2009-02-17 | Fujitsu Limited | Method, apparatus, and medium for migration across link technologies |
| TWI589169B (en) * | 2015-09-18 | 2017-06-21 | Wireless network communication system and communication method thereof | |
| CN107205256B (en) * | 2017-04-17 | 2020-05-22 | 西安交通大学 | Relay selection method based on social characteristics in D2D relay network |
| EP3649814B1 (en) * | 2017-07-04 | 2020-12-30 | Telefonaktiebolaget LM Ericsson (publ) | Methods and devices for scheduling group uplink communication |
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