CN116367290A - Connection method between wireless network devices and wireless network communication system - Google Patents
Connection method between wireless network devices and wireless network communication system Download PDFInfo
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- CN116367290A CN116367290A CN202310428804.0A CN202310428804A CN116367290A CN 116367290 A CN116367290 A CN 116367290A CN 202310428804 A CN202310428804 A CN 202310428804A CN 116367290 A CN116367290 A CN 116367290A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/241—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account channel quality metrics, e.g. SIR, SNR, CIR, Eb/lo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/367—Power values between minimum and maximum limits, e.g. dynamic range
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/25—Maintenance of established connections
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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 network communication, in particular to a connection method between wireless network devices and a wireless network communication system, wherein the connection method comprises the following steps that S1, a first wireless network device sends message information carrying information of maximum transmission power and information of actual transmission power to second wireless network devices of a network; step S2, the first wireless network equipment detects the channel quality between the second wireless network equipment, calculates the actual channel quality based on the actual transmitting power information based on the detection result and the actual transmitting power corresponding to the second wireless network equipment, and selects the second wireless network equipment for connection based on the actual channel quality. The invention solves the problem of miscwitching connection between devices after power adjustment of wireless network devices in a wireless mesh network by providing the connection method between the wireless network devices.
Description
Technical Field
The present invention relates to the field of network communication technologies, and in particular, to a method for connecting wireless network devices and a wireless network communication system.
Background
In the time division duplex wireless MESH network ((TDD-MESH) which is actually deployed at present, in order to ensure interconnection and interworking between nodes, equipment nodes in the network generally use full-power transmitting signals, so that on one hand, the power consumption and the heat of equipment are increased, the working time of the equipment is shortened, and on the other hand, when two adjacent wireless network equipment use close or overlapped frequency bands, larger interference can be generated between the two adjacent wireless network equipment by transmitting at maximum power.
Therefore, power control needs to be performed on the wireless network devices to control the actual transmission power of the wireless network devices, but after the transmission power of the wireless network devices is reduced, the channel quality between the devices is reduced to a certain extent, and the wireless MESH network MESH always performs connection switching between the wireless network devices based on the channel quality detection result between the devices directly detected by the detection devices, so if the channel quality between the traditional direct detection devices is used as the only reference index, the actual channel quality between the devices is calculated without considering the gain effect caused by combining the transmission power of the wireless network devices, and the connection between the wireless network devices is erroneously switched or frequently switched or few devices keep the connection with the wireless network devices with the reduced transmission power, thereby generating the influence of the erroneous switching between the devices.
Disclosure of Invention
The invention aims to provide a connection method between wireless network devices, which solves the technical problems;
the present invention also aims to provide a wireless network communication system, which solves the above technical problems.
The technical problems solved by the invention can be realized by adopting the following technical scheme:
a method for connecting wireless network devices includes,
step S1, a first wireless network device sends message information carrying information of maximum transmitting power and information of actual transmitting power to a second wireless network device of a networking;
step S2, the first wireless network device detects channel quality between the second wireless network devices, calculates an actual channel quality based on the actual transmission power information based on the detection result and the actual transmission power corresponding to the second wireless network devices, and selects the second wireless network devices to connect based on the actual channel quality.
Preferably, in step S1, the first wireless network device and the second wireless network device perform networking based on the maximum transmission power and the actual transmission power, and the first wireless network device and the second wireless network device determine the actual transmission power through negotiation, which includes,
step S11, the first wireless network device receives the message data sent by the second wireless network device;
step S12, the first wireless network device evaluates the error rate of the message data and judges whether the error rate of the message data is lower than a set value, and the first wireless network device sends a power adjustment instruction to the second wireless network device;
step S13, the second wireless network device adjusts the transmission power of the packet data based on the power adjustment instruction.
Preferably, in step S12, if the error rate of the packet data is lower than the set value, the first wireless network device sends the power adjustment instruction for power down adjustment; if the error rate of the message data is higher than the set value, the first wireless network device sends the power adjustment instruction for power up adjustment;
in step S13, the second wireless network device decreases the transmission power of the next packet data based on the power adjustment instruction of the power down adjustment, and the second wireless network device increases the transmission power of the next packet data based on the power adjustment instruction of the power up adjustment.
Preferably, in step S1, if the first wireless network device is connected to a plurality of second wireless network devices, a maximum value of the actual transmission powers determined by the second wireless network devices is selected as the actual transmission power, or the first wireless network device switches between the actual transmission powers of the second wireless network devices, and data is transmitted to each of the second wireless network devices with a corresponding power.
Preferably, in step S3, the signal-to-noise ratio of the actual channel quality is equal to the signal-to-noise ratio between the first wireless network device and the second wireless network device plus the signal-to-noise ratio corresponding to the difference between the maximum transmission power and the actual transmission power.
Preferably, the actual transmit power is less than the maximum transmit power.
A wireless network communication system is used for implementing the connection method between wireless network devices, and comprises a plurality of wireless access devices, wherein the wireless network devices comprise the first wireless network device and the second wireless network device, each wireless access device is provided with a set power transmission period, and a plurality of first power transmission periods working with the actual transmission power and a plurality of second power transmission periods working with the maximum transmission power are included in one power transmission period.
Preferably, the wireless network devices operating at maximum transmit power are visible to each other.
Preferably, the first power transmission period and the second power transmission period have the same time length.
Preferably, the time length of the first power transmission period and the second power transmission period is 1ms-10000000ms.
The invention has the beneficial effects that: by adopting the technical scheme, the invention solves the problem of miscwitching connection between devices after power adjustment of the wireless network devices in the wireless mesh network by providing the connection method between the wireless network devices.
Drawings
Fig. 1 is a schematic diagram illustrating steps of a connection method between wireless network devices according to an embodiment of the present invention;
fig. 2 is a schematic diagram of step S1 in the embodiment of the invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The invention is further described below with reference to the drawings and specific examples, which are not intended to be limiting.
A method of connection between wireless network devices, as shown in fig. 1, includes,
step S1, a first wireless network device sends message information carrying information of maximum transmitting power and information of actual transmitting power to a second wireless network device of a networking;
step S2, the first wireless network equipment detects the channel quality between the second wireless network equipment, calculates the actual channel quality based on the actual transmitting power information based on the detection result and the actual transmitting power corresponding to the second wireless network equipment, and selects the second wireless network equipment for connection based on the actual channel quality.
Specifically, the invention can avoid the problem that the wireless network equipment always keeps the signal to transmit with the maximum power in the wireless MESH network (MESH), the wireless network equipment and the wireless network equipment determine the actual transmitting power of the signal through negotiation according to the bandwidth actually required, but after the transmitting power is reduced to the actual transmitting power, the monitoring detection result of the wireless network equipment on the channel quality connected with other wireless network equipment is also reduced, the wireless network equipment is usually preferentially connected with the other wireless network equipment with better communication quality, thus causing the problem of error switching.
In a preferred embodiment, as shown in fig. 2, the first wireless network device and the second wireless network device are networked based on the maximum transmission power and the actual transmission power in step S1, and the first wireless network device and the second wireless network device determine the actual transmission power through negotiation, including,
step S11, the first wireless network device receives message data sent by the second wireless network device;
step S12, the first wireless network device evaluates the error rate of the message data, judges whether the error rate of the message data is lower than a set value, and sends a power adjustment instruction to the second wireless network device;
in step S13, the second wireless network device adjusts the transmission power of the packet data based on the power adjustment instruction.
In a preferred embodiment, in step S12, if the error rate of the packet data is lower than the set value, the first wireless network device sends a power adjustment instruction for power down adjustment; if the error rate of the message data is higher than a set value, the first wireless network equipment sends a power adjustment instruction for power up adjustment;
in step S13, the second wireless network device decreases the transmission power of the next packet data based on the power adjustment instruction for power down-regulation, and the second wireless network device increases the transmission power of the next packet data based on the power adjustment instruction for power up-regulation.
Specifically, the present invention may determine the actual transmitting power by using a general closed loop power control manner, and in this embodiment, taking a connection between a first wireless network device a and a second wireless network device B as an example, the first wireless network device a sends message data to the second wireless network device B; the second wireless network equipment B receives the message data from the first wireless network equipment A and evaluates the error rate of the data message; if the error rate is lower than the set value, the second wireless network equipment B sends a power down-regulating instruction to the equipment A; if the error rate is higher than the set value, the second wireless network equipment B sends a power up-regulating instruction to the first wireless network equipment A; the first wireless network device A receives a power down instruction or a power up instruction of the second wireless network device B, and reduces the transmission power of next message data based on the power down instruction; and raising the transmission power of the next message data based on the power up instruction.
In a preferred embodiment, if the first wireless network device is connected to a plurality of second wireless network devices, the maximum value of the actual transmission powers determined by the second wireless network devices is selected as the actual transmission power, or the first wireless network device switches between the actual transmission powers of the second wireless network devices, and data is transmitted at a corresponding power to each second wireless network device.
Specifically, if one wireless network device communicates with another plurality of wireless network devices simultaneously, a maximum value is selected as an actual transmission power from among transmission powers negotiated with all the wireless network devices. The power may also be quickly adjusted based on the actual transmit power determined by each second wireless network device, with different power for each device transmitting data.
In a preferred embodiment, in step S3, the signal-to-noise ratio of the actual communication quality is a signal-to-noise ratio between the first wireless network device and the second wireless network device obtained by the detection plus a signal-to-noise ratio corresponding to a difference between the maximum transmission power and the actual transmission power.
Specifically, when the communication quality is evaluated, the signal to noise ratio corresponding to the difference value between the maximum transmission power and the actual transmission power is also calculated in addition to the detection result, so that the actual communication quality after power reduction is considered in calculation, the problem of error switching is avoided, and the influence of power adjustment on wireless routing is avoided; for example, according to the received signal of the second wireless network device B, the first wireless network device a calculates that the signal-to-noise ratio of the wireless signal from the second wireless network device B is 15dB, and meanwhile, the maximum transmission power of the second wireless network device B is 30dBm, and the actual transmission power is 27dBm, and then, the signal-to-noise ratio of the actual communication quality corresponding to the second wireless network device B during the route calculation is: 15+ (30-27) =18 dB; according to the received signal of the second wireless network device C, the first wireless network device A calculates the signal-to-noise ratio of the wireless signal from the second wireless network device B to be 16dB, meanwhile, the second wireless network device C sends the signal with the maximum transmitting power of 30dBm, if the method provided by the invention is not adopted, the first wireless network device A can preferably select the second wireless network device C with the higher detected communication quality of 16dB for switching connection, the invention preferably takes the signal-to-noise ratio corresponding to the difference value between the maximum transmitting power and the actual transmitting power into account based on the method, so that the actual communication quality after power reduction is considered in calculation, and the actual communication quality corresponding to the second wireless network device B is calculated to be 18dB, so that switching is not needed to be executed, and the influence of power adjustment on wireless routing is avoided.
Of course, the signal transmitting power of different types of wireless network devices corresponds to different signal to noise ratios, and all the signal transmitting power and the signal to noise ratio are included in the protection scope of the invention.
In a preferred embodiment, the actual transmit power is less than the maximum transmit power.
A wireless network communication system for implementing a connection method between wireless network devices in any embodiment includes a plurality of wireless access devices, where each wireless network device includes a first wireless network device and a second wireless network device, each wireless access device has a set power transmission period, and a power transmission period includes a plurality of first power transmission periods operating with actual transmission power and a plurality of second power transmission periods operating with maximum transmission power.
Specifically, the transmission power of the wireless network device is adjusted according to a fixed periodic pattern. The periodic pattern is divided into two time periods: a first power transmission period operating at an actual transmission power and a second power transmission period operating at a maximum transmission power; during the second power transmission time, the power control process is turned off and always transmits at maximum power; during a first power transmission time, a power control procedure is enabled, using actual transmission power transmissions negotiated by the wireless network device with other wireless network devices.
In a preferred embodiment, wireless network devices operating at maximum transmit power are visible to each other.
In a preferred embodiment, the first power transmission period and the second power transmission period are of the same time length.
In a specific embodiment, one example of a periodic pattern is: 101001; wherein 1 denotes a first power transmission period, 0 denotes a sustained second power transmission period, and the timing is as follows:
if the wireless network devices are mutually invisible due to the fact that the transmission power is adjusted downwards by power control, and the first power transmission period between the wireless network devices is random, then the two wireless network devices need to be visible again when the two wireless network devices are at the maximum transmission power at the same time, and synchronization is established, as shown in table 1, therefore, the time required for establishing connection may be as follows:
| A | 1 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 1 |
| B | 1 | 0 | 1 | 0 | 0 | 1 | ||||||
| C | 1 | 0 | 1 | 0 | 0 | 1 | ||||||
| D | 1 | 0 | 1 | 0 | 0 | 1 | ||||||
| E | 1 | 0 | 1 | 0 | 0 | 1 | ||||||
| F | 1 | 0 | 1 | 0 | 0 | 1 | ||||||
| G | 1 | 0 | 1 | 0 | 0 | 1 |
TABLE 1
The second wireless network device B and the first wireless network device a have the same first power transmission period in the same time unit, so that connection can be established when the second wireless network device B is in the first time unit, the second wireless network device C and the first wireless network device a are worse by one time unit, as can be seen from table 1, when the second wireless network device C is in the fourth time unit, the second wireless network device C and the first wireless network device a are simultaneously 0, i.e. are simultaneously in the maximum power transmission state, at this time, the second wireless network device C and the first wireless network device a are mutually visible and establish connection, and so on, the second wireless network device D is in the second time unit, the second wireless network device E is in the second time unit, the second wireless network device F is in the fourth time unit, and the second wireless network device G is simultaneously 0, i.e. is simultaneously in the maximum power transmission state, so as to establish connection with the first wireless network device a; the two devices after connection adjust the transmitting power, and keep the wireless link available.
In a preferred embodiment, the time length of the first power transmission period and the second power transmission period is 1ms-10000000ms. The length of the power adjustment time unit takes a value according to the specific situation of the device implementation, and in this embodiment, the time unit may be 10ms, or may be 1s or longer, for example, 10s.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not to be construed as limiting the scope of the invention, and it will be appreciated by those skilled in the art that equivalent substitutions and obvious variations may be made using the description and illustrations of the present invention, and are intended to be included within the scope of the present invention.
Claims (10)
1. A method for connecting wireless network devices, comprising,
step S1, a first wireless network device sends message information carrying information of maximum transmitting power and information of actual transmitting power to a second wireless network device of a networking;
step S2, the first wireless network device detects channel quality between the second wireless network devices, calculates an actual channel quality based on the actual transmission power information based on the detection result and the actual transmission power corresponding to the second wireless network devices, and selects the second wireless network devices to connect based on the actual channel quality.
2. The method according to claim 1, wherein the first wireless network device and the second wireless network device perform networking based on the maximum transmission power and the actual transmission power in step S1, and the first wireless network device and the second wireless network device determine the actual transmission power through negotiation, including,
step S11, the first wireless network device receives the message data sent by the second wireless network device;
step S12, the first wireless network device evaluates the error rate of the message data and judges whether the error rate of the message data is lower than a set value, and the first wireless network device sends a power adjustment instruction to the second wireless network device;
step S13, the second wireless network device adjusts the transmission power of the packet data based on the power adjustment instruction.
3. The method according to claim 2, wherein in step S12, if the error rate of the packet data is lower than the set value, the first wireless network device sends the power adjustment command for power down adjustment; if the error rate of the message data is higher than the set value, the first wireless network device sends the power adjustment instruction for power up adjustment;
in step S13, the second wireless network device decreases the transmission power of the next packet data based on the power adjustment instruction of the power down adjustment, and the second wireless network device increases the transmission power of the next packet data based on the power adjustment instruction of the power up adjustment.
4. The method according to claim 2, wherein in step S1, if the first wireless network device is connected to a plurality of the second wireless network devices, a maximum value of the actual transmission powers determined by the second wireless network devices is selected as the actual transmission power, or the first wireless network device switches between the actual transmission powers of the second wireless network devices, and data is transmitted at a corresponding power to each of the second wireless network devices.
5. The method according to claim 1, wherein in step S3, the signal-to-noise ratio of the actual channel quality is equal to the signal-to-noise ratio between the first wireless network device and the second wireless network device plus the signal-to-noise ratio corresponding to the difference between the maximum transmission power and the actual transmission power.
6. The method of claim 1, wherein the actual transmit power is less than the maximum transmit power.
7. A wireless network communication system for implementing the method for connecting between wireless network devices according to any one of claims 1 to 6, comprising a plurality of wireless access devices, wherein the wireless network devices include the first wireless network device and the second wireless network device, each of the wireless access devices has a set power transmission period, and one of the power transmission periods includes a plurality of first power transmission periods operating at the actual transmission power and a plurality of second power transmission periods operating at the maximum transmission power.
8. The wireless network communication system of claim 7, wherein the wireless network devices operating at maximum transmit power are visible to each other.
9. The method of claim 7, wherein the first power transmission period and the second power transmission period have the same time length.
10. The method of claim 9, wherein the first power transmission period and the second power transmission period have a time length of 1ms-10000000ms.
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