CN116390146A - Wireless environment measurement and frequency point synchronous switching method in wireless mesh network - Google Patents
Wireless environment measurement and frequency point synchronous switching method in wireless mesh network Download PDFInfo
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- CN116390146A CN116390146A CN202310400829.XA CN202310400829A CN116390146A CN 116390146 A CN116390146 A CN 116390146A CN 202310400829 A CN202310400829 A CN 202310400829A CN 116390146 A CN116390146 A CN 116390146A
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- 238000005259 measurement Methods 0.000 title claims abstract description 107
- 238000000034 method Methods 0.000 title claims abstract description 20
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 16
- 230000005540 biological transmission Effects 0.000 claims abstract description 16
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 238000004891 communication Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 2
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/0005—Control or signalling for completing the hand-off
- H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
- H04W36/0085—Hand-off measurements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/06—Reselecting a communication resource in the serving access point
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W36/00—Hand-off or reselection arrangements
- H04W36/24—Reselection being triggered by specific parameters
- H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
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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
Abstract
The invention relates to the technical field of communication, in particular to a wireless environment measurement and frequency point synchronous switching method in a wireless mesh network, which comprises the following steps that S1, a plurality of nodes with low data transmission load are selected as measurement nodes in the wireless mesh network based on the load condition of each node; step S2, the measuring node carries out wireless measurement on the frequency points used for switching, and sends a measurement notification to other nodes; s3, forming a measurement report by the measurement node after the measurement is finished, and sending the measurement report to other nodes; step S4, each node decides whether to initiate frequency point switching based on measurement report negotiation, if so, the frequency point switching is executed according to the switching parameters; according to the method, the node is used for measuring the frequency point and realizing frequency point switching, so that the problem of mutual interference and environmental interference of the wireless grid network are solved, and the environment adaptability of the time division duplex wireless grid network in actual deployment is improved.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a wireless environment measurement and frequency point synchronous switching method.
Background
Wireless MESH network (MESH network) technology based on Time Division Duplex (TDD) has been widely used, but current time division duplex wireless MESH network technology mainly considers optimization of a routing layer, and cannot solve the problem of mutual interference and environmental interference of a plurality of wireless MESH networks existing in actual deployment, resulting in poor environment adaptability of the time division duplex wireless MESH network in actual deployment.
Disclosure of Invention
The invention aims to provide a wireless environment measurement and frequency point synchronous switching method in a wireless mesh network, which solves the technical problems;
a wireless environment measurement and frequency point synchronous switching method in a wireless mesh network comprises the steps of,
step S1, selecting a plurality of nodes with low data transmission load as measurement nodes in a wireless mesh network based on the load condition of each node;
step S2, the measurement node performs wireless measurement on the frequency points used for switching, and sends measurement notification to other nodes;
step S3, the measurement node forms a measurement report after the measurement is finished, and sends the measurement report to other nodes;
step S4, each node decides whether to initiate frequency point switching based on the measurement report negotiation, if yes, the frequency point switching is executed according to the switching parameters; otherwise, the frequency point switching is not performed.
Preferably, in step S1, a plurality of measurement periods are preset, and the node with a low data transmission load corresponding to the measurement period is selected as the measurement node.
Preferably, the measurement periods are selected based on slot allocation for data transceiving, each of the measurement periods having a settable duration.
Preferably, in step S2, the node transmits the measurement notification to the neighboring node after receiving the measurement notification, and if the neighboring node is performing wireless measurement, the node sends the measurement notification buffer to the neighboring node.
Preferably, in step S2, when the measurement node performs wireless measurement, if a data transmission request of an upper layer is received, data is temporarily buffered locally, and a data transmission task is performed after the wireless measurement is completed.
Preferably, in step S3, the measurement report is sent to all the other nodes in the wireless mesh network by unicast or broadcast.
Preferably, the measurement content of the measurement node is average signal strength in a set time period in a set bandwidth.
Preferably, the measurement report at least includes a center frequency, a bandwidth, and a signal strength of the frequency point.
Preferably, in step S4, the parameters of the handover include at least a handover time and a synchronized central node after the handover, where the handover time includes a designated frequency and a time slot; the switched synchronous central node is the synchronous central node in the current wireless mesh network or the newly selected synchronous central node.
Preferably, after the node switches the frequency point in the designated frequency and time slot, the node performs synchronization based on the switched synchronization center node.
The invention has the beneficial effects that: by adopting the technical scheme, the method and the device measure the frequency points through the nodes and realize frequency point switching, solve the problem of mutual interference and environmental interference of the wireless grid network, and improve the environment adaptability of the time division duplex wireless grid network in actual deployment.
Drawings
Fig. 1 is a schematic diagram of steps of a method for wireless environment measurement and frequency synchronization handover in an embodiment of the present 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 wireless environment measurement and frequency point synchronization switching method in a wireless mesh network, as shown in fig. 1, includes,
step S1, selecting a plurality of nodes with low data transmission load as measurement nodes in a wireless mesh network based on the load condition of each node;
step S2, the measuring node carries out wireless measurement on the frequency points used for switching, and sends a measurement notification to other nodes;
s3, forming a measurement report by the measurement node after the measurement is finished, and sending the measurement report to other nodes;
step S4, each node decides whether to initiate frequency point switching based on measurement report negotiation, if so, the frequency point switching is executed according to the switching parameters; otherwise, the frequency point switching is not performed.
Specifically, the invention is used for solving the problem of mutual interference and environmental interference of a plurality of wireless networks possibly existing in actual deployment in the current Time Division Duplex (TDD) wireless MESH network (MESH network), improving the environment adaptability of the time division duplex wireless MESH network in the actual deployment.
In a preferred embodiment, in step S1, a plurality of measurement periods are preset, and a node with a low data transmission load corresponding to the measurement period is selected as a measurement node;
specifically, each node selects a wireless measurement period according to the load condition of the node, and the node with low load in the embodiment selects more measurements, and each measurement period is as small as possible on the premise of meeting the measurement requirement, so that the influence on normal transmission is avoided.
Specifically, each node performs measurement of the wireless environment without affecting the current service node, and the wireless measurement comprises same-frequency measurement and different-frequency measurement.
In a preferred embodiment, the measurement periods are selected based on slot assignments for data transceiving, each measurement period having a settable duration;
specifically, the measurement period of each node may be selected according to the allocation situation of Time Division Duplex (TDD) time slots, and the inactive time slots of the node may be optimized as much as possible.
In a preferred embodiment, in step S2, the node transmits the measurement notification to the neighboring node after receiving the measurement notification, and if the neighboring node is performing wireless measurement, the node transmits a measurement notification buffer to the neighboring node.
In a preferred embodiment, in step S2, when the measurement node performs wireless measurement, if a data transmission request of an upper layer is received, data is temporarily buffered locally, and a data transmission task is performed after the wireless measurement is completed.
In a preferred embodiment, in step S3, the measurement report is sent to all the remaining nodes in the wireless mesh network by unicast or broadcast.
In a preferred embodiment, the measurement content of the measurement node is the average signal strength in a set time period in a set bandwidth;
specifically, the measurement content in this embodiment may further include whether other measurement systems exist.
In a preferred embodiment, the measurement report includes at least a center frequency, a bandwidth, and a signal strength of the frequency point;
specifically, the measurement report in this embodiment may further include an occupancy proportion of the channel.
In a preferred embodiment, in step S4, the parameters of the handover include at least a handover time and a synchronized central node after the handover, and the handover time includes a specified frequency and a time slot; the switched synchronization center node is the synchronization center node in the current wireless mesh network or the newly selected synchronization center node.
In a preferred embodiment, after the node switches the frequency point at the designated frequency and time slot, the node performs synchronization based on the switched synchronization center node;
specifically, after the designated single frequency network frequency (SFN) and time slot switch frequency points, for the switched synchronization center nodes, no additional synchronization flow is needed, and for other nodes, synchronization is realized with the switched synchronization center nodes on the new frequency points.
In summary, the invention solves the problem of mutual interference and environmental interference of a plurality of wireless networks possibly existing in actual deployment in the current Time Division Duplex (TDD) wireless MESH network (MESH network), and improves the environment adaptability of the time division duplex wireless MESH network in the actual deployment.
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 wireless environment measurement and frequency point synchronous switching method in a wireless mesh network is characterized by comprising the following steps of,
step S1, selecting a plurality of nodes with low data transmission load as measurement nodes in a wireless mesh network based on the data transmission load of each node;
step S2, the measurement node performs wireless measurement on the frequency points used for switching, and sends measurement notification to other nodes;
step S3, the measurement node forms a measurement report after the measurement is finished, and sends the measurement report to other nodes;
step S4, each node decides whether to initiate frequency point switching based on the measurement report negotiation, if yes, the frequency point switching is executed according to the switching parameters; otherwise, the frequency point switching is not performed.
2. The method according to claim 1, wherein in step S1, a plurality of measurement periods are preset, and the node with a low data transmission load corresponding to the measurement period is selected as the measurement node.
3. The wireless environment measurement and frequency synchronization switching method according to claim 2, wherein the measurement periods are selected based on slot allocation of data transmission and reception, each of the measurement periods having a settable duration.
4. The method according to claim 1, wherein in step S2, the node transmits the measurement notification to the neighboring node after receiving the measurement notification, and if the neighboring node is performing wireless measurement, the node transmits the measurement notification buffer to the neighboring node.
5. The method for wireless environment measurement and frequency synchronization switching according to claim 1, wherein in step S2, when the measurement node performs wireless measurement, if a data transmission request of an upper layer is received, data is temporarily buffered locally, and a data transmission task is performed after the wireless measurement is completed.
6. The method according to claim 1, wherein in step S3, the measurement report is sent to all the other nodes in the wireless mesh network by unicast or broadcast.
7. The method for wireless environment measurement and frequency synchronization switching according to claim 1, wherein the measurement content of the measurement node is an average signal strength in a set time period in a set bandwidth.
8. The method according to claim 1, wherein the measurement report includes at least a center frequency, a bandwidth, and a signal strength of a frequency point.
9. The method according to claim 1, wherein in step S4, the parameters of the handover include at least a handover time and a synchronized center node after the handover, and the handover time includes a designated frequency and a time slot; the switched synchronous central node is the synchronous central node in the current wireless mesh network or the newly selected synchronous central node.
10. The wireless environment measurement and frequency point synchronization switching method according to claim 1, wherein after the node switches frequency points at a specified frequency and time slot, the node performs synchronization based on the switched synchronization center node.
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