CN114466413A - Bandwidth adjusting method, communication device and computer-readable storage medium - Google Patents
Bandwidth adjusting method, communication device and computer-readable storage medium Download PDFInfo
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- CN114466413A CN114466413A CN202011247481.8A CN202011247481A CN114466413A CN 114466413 A CN114466413 A CN 114466413A CN 202011247481 A CN202011247481 A CN 202011247481A CN 114466413 A CN114466413 A CN 114466413A
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- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
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Abstract
The invention provides a bandwidth adjusting method, a communication device and a computer readable storage medium, wherein the method comprises the following steps: determining a first target system bandwidth of each node to be scheduled in a target time period; determining the priority of each node to be scheduled in a target time interval; determining a first target system bandwidth corresponding to a node to be scheduled with the highest priority as a target bandwidth of a target time interval; and informing at least part of nodes to be scheduled to set the system bandwidth of the nodes to be scheduled in the target time period as the target bandwidth. According to the bandwidth adjusting method, the target bandwidth is determined according to the priority of each node to be scheduled, and the coverage performance of the MESH wireless ad hoc network is better improved.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a bandwidth adjustment method, a communications apparatus, and a computer-readable storage medium.
Background
In the MESH wireless ad hoc network, in a certain time slot, a sending node simultaneously sends data to a plurality of nodes with different channel qualities and service volumes, which causes that the MESH wireless ad hoc network cannot adopt the existing method in the LTE to control the signal transmission power sent to each node, so that the unit bandwidth signal power of the signal sent to each node is the same, and for the node with better channel quality, the overhigh unit bandwidth signal power is easy to cause interference to other nodes on one hand, and on the other hand, the fixed system bandwidth can limit the throughput of service transmission; for a receiving node with poor channel quality, the signal power per bandwidth cannot be increased to improve the signal receiving performance, which results in a rapid decrease in throughput.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a bandwidth adjusting method, a communication device and a computer readable storage medium, which can better increase the coverage performance of a wireless network system.
In order to solve the technical problems, the invention adopts a technical scheme that: there is provided a bandwidth adjustment method, the method comprising:
determining a first target system bandwidth of each node to be scheduled in a target time period;
determining the priority of each node to be scheduled in the target time interval;
determining the first target system bandwidth corresponding to the node to be scheduled with the highest priority as the target bandwidth of the target time interval;
informing at least part of the nodes to be scheduled to set their system bandwidth in the target period as the target bandwidth.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a communication device comprising a memory, a processor, and communication circuitry, the memory and the communication circuitry being respectively coupled to the processor, wherein,
the communication circuit is connected with the processing circuit and performs data interaction with an external communication device under the control of the processor;
the memory includes local storage and stores a computer program;
the processor is adapted to run the computer program to perform the method as described above.
In order to solve the technical problem, the invention adopts another technical scheme that: there is provided a computer-readable storage medium storing a computer program executable by a processor for implementing the method as described above.
The invention has the beneficial effects that: different from the situation in the prior art, the bandwidth adjusting method, the communication device and the computer readable storage medium provided by the present invention improve the coverage performance of the wireless network system in the target period on the premise of ensuring the communication quality by determining the first target system bandwidth of each node to be scheduled in the target period, determining the priority of each node to be scheduled in the target period, then according to the determined priority of each node to be scheduled in the target period, setting the first target system bandwidth corresponding to the node to be scheduled with the highest priority as the target bandwidth of the target period, and notifying at least part of the nodes to be scheduled to set the system bandwidth of the node to be scheduled in the target period as the target bandwidth after determining the target bandwidth.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts. Wherein:
fig. 1 is a schematic flow chart of an embodiment of a bandwidth adjustment method according to the present application;
fig. 2 is a schematic flow chart of another embodiment of a bandwidth adjustment method according to the present application;
fig. 3 is a schematic flow chart of another embodiment of a bandwidth adjustment method according to the present application;
fig. 4 is a schematic flowchart of a bandwidth adjustment method according to another embodiment of the present application;
fig. 5 is a schematic structural diagram of an embodiment of a communication device according to the present application;
FIG. 6 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present application;
FIG. 7 is a schematic diagram of the location of PBWICH resource mapping.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanying figures are described in detail below. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "comprising" and "having," as well as any variations thereof, in the present invention are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
It should be noted that, in the existing MESH wireless ad hoc network, in a certain time interval, a sending node sends data to a plurality of nodes with different channel qualities and traffic volumes at the same time, which results in that the MESH wireless ad hoc network cannot control the signal transmission power sent to each node by using the existing LTE (long term evolution), so that the signal power per unit bandwidth of the signal sent to each node is the same, and for the node with better channel quality, the excessively high signal power per unit bandwidth is easy to cause interference to other nodes on one hand, and on the other hand, the fixed system bandwidth may limit the throughput of traffic transmission; for the receiving node with poor channel quality, the signal power of the unit bandwidth of the receiving node cannot be improved to improve the signal receiving performance, so that the throughput of the receiving node is reduced sharply, and the technical scheme provided by the application can better solve the problems in the existing MESH wireless ad hoc network, can better improve the power resource use efficiency, and can enhance the coverage of the wireless MESH network.
Referring to fig. 1, fig. 1 is a schematic flow chart of an embodiment of a bandwidth adjusting method according to the present application. In the current embodiment, the method provided by the present application includes:
s110: and determining a first target system bandwidth of each node to be scheduled in a target time interval.
Firstly, a first target system bandwidth corresponding to each node to be scheduled in the wireless ad hoc network in a target time period is determined. The node to be scheduled refers to a receiving node in a wireless ad hoc network, the wireless ad hoc network includes a plurality of nodes, and different nodes may be used to process different services in different time periods, which may be specifically described in the corresponding sections below. In step S110, a first target system bandwidth corresponding to each node for receiving data in a target time period in the wireless ad hoc network is obtained.
It should be noted that each node in the wireless ad hoc network may be a receiving node for receiving data sent by other nodes or terminal devices in different time periods according to preset communication attributes, and each node may also be converted into a sending node for sending data to an external node or other terminal devices in another time period according to the setting of the node attributes.
Step S110 in the current embodiment is for determining a first target system bandwidth of each node to be scheduled in the target period. The first target system bandwidth is the maximum bandwidth which can be used for the service transmission throughput in the target time period and on the premise of ensuring the data receiving performance of the node to be scheduled. For the determination process of the first target system bandwidth, see the following corresponding embodiments in fig. 2 to 4.
In the present embodiment, the target time interval may be a current time interval, or a time interval after the current time interval, or other time intervals after the current time interval, which is not limited herein, and may be specifically adjusted according to a specific setting. In the present embodiment, one period may comprise one communication frame, i.e. the target period refers to one communication frame for which bandwidth adjustment is required. It is understood that, in other embodiments, a period may include a plurality of communication frames, and the corresponding target period is a plurality of communication frames that need to be bandwidth-adjusted, and specifically, the number of communication frames included in the target period may be set and adjusted according to actual needs, and is not limited herein.
Further, one period may be to include a plurality of consecutive communication frames. It is understood that in other embodiments, a time period may also include a plurality of consecutive communication frames, and every two adjacent frames are separated by the same number of communication frames.
In another embodiment, the Time period may also include one communication Time Interval (Transmission Time Interval), that is, one Time period includes one Transmission Time Interval in the wireless ad hoc network. It is understood that, in other embodiments, the time period may also include a plurality of communication time slots, which is not limited herein.
S120: and determining the priority of each node to be scheduled in the target time period.
After the first target system bandwidth of each node to be scheduled in the target time period is determined, the priority of each scheduling node in the target time period is further determined, so as to be used for determining the target bandwidth of the wireless ad hoc network in the target time period. When the nodes to be scheduled are used for processing different types of services in different target time periods, the services processed by the nodes to be scheduled in the target time periods are respectively determined, then the priority of the nodes to be scheduled in the target time periods is determined according to the determined service types processed by the nodes to be scheduled in the target time periods and then the priority of the nodes to be scheduled in the target time periods is determined according to the determined service types.
In the technical solution provided by the present application, when each node to be scheduled is used for processing a plurality of different types of services in the same target time period, the priority corresponding to the service with the highest priority in the same target time period is determined as the priority of the node to be scheduled in the target time period. In the current embodiment, priority factors are respectively set for each type of service in advance according to the attributes of the services. The attributes of the service include at least the timeliness of the service. It is understood that in other embodiments, the attribute of the service may further include other information, such as the data size of the service, which is not limited herein.
Further, the step S120 of determining the priority of each node to be scheduled in the target time period further includes: and calculating and determining the current corresponding priority of each node to be scheduled according to the following formula. Wherein, the formula is as follows:
wherein, PtrafficIs a preset service priority factor, Throughput, of the node to be scheduledhistoryIs the historical average transmission rate, scheduled interval, of the node to be scheduledhistoryIs the historical average scheduling time interval of the node to be scheduled, alpha and beta are preconfigured weight factors, and the BSR is the data volume of the buffer status report. Wherein, ThroughputhistoryAnd schedule IntervalhistoryMay be calculated from historical data. Therefore, the method provided by the present application further includes recording process parameters for performing bandwidth control, where the process parameters at least include a scheduling time interval of each time and a transmission rate of the traffic data, and it is understood that in other embodiments, the process parameters may also include other parameters.
Wherein, PtrafficIs determined by the highest priority traffic type present at the node to be scheduled. In an embodiment, it is assumed that N different priority services exist in a wireless ad hoc network, and the services are ranked from high to low according to priority, the service priorities corresponding to the N services are respectively N, N-1, N-2, and … … 1, and if the priority factor of the service with the highest priority existing in a node to be scheduled is M, then P of the scheduling node is Ptraffic＝M。
S130: and determining a first target system bandwidth corresponding to the node to be scheduled with the highest priority as a target bandwidth of a target time interval.
After the first target system bandwidth and the priority of each node to be scheduled in the target time period are determined, the priorities of the nodes to be scheduled in the target time period determined in step S120 are further compared, and then the first target system bandwidth corresponding to the node to be scheduled with the highest priority is determined as the target bandwidth of the wireless ad hoc network in the target time period. The target bandwidth refers to a bandwidth for performing data interaction between nodes in the wireless ad hoc network in a target time period, the priority of the node to be scheduled in the target time period is the priority determined in step S120, and when the node to be scheduled is used for processing a plurality of different services, the highest priority in each service is determined as the priority of the node to be scheduled in the target time period, and then the corresponding first target system bandwidth of the node to be scheduled with the highest priority in the target time period is determined as the target bandwidth of the target time period in step S130, so that the node to be scheduled with the highest priority can complete the service preferentially and quickly in the target time period.
S140: and informing at least part of nodes to be scheduled to set the system bandwidth of the nodes in the target time period as the target bandwidth.
After determining a first target system bandwidth corresponding to a node to be scheduled with the highest priority as a target bandwidth in a target time period, further notifying at least part of nodes to be scheduled in the wireless ad hoc network to set the system bandwidth of the nodes to be scheduled in the target time period as the target bandwidth, so that the nodes to be scheduled can perform data interaction with a sending node in the current target time period. It should be noted that other nodes to be scheduled, which do not adjust the system bandwidth to the target bandwidth, may preferentially transmit the data service in other time periods. Specifically, according to a set rule, the priority of the node to be scheduled, which does not transmit the service data in the current target time period, is appropriately increased, so that other nodes to be scheduled can preferentially transmit the service data in other time periods.
Further, in another embodiment, step S140 is to notify all nodes to be scheduled in the wireless ad hoc network to set their system bandwidths in the target time period as the target bandwidth for data interaction with other nodes in the wireless ad hoc network in the target time period.
Further, the step S140 of notifying at least a part of the nodes to be scheduled to set their system bandwidths in the target period as the target bandwidth further comprises: and sending a bandwidth change instruction to at least part of nodes to be scheduled.
The bandwidth changing instruction is used for informing the node to be scheduled to change the system bandwidth of the node to be scheduled in the target time period to the target bandwidth. At least part of nodes to be scheduled further change the system bandwidth of the nodes to be scheduled to the target bandwidth in the target time period after receiving the bandwidth change instruction, and then perform data interaction with the sending node in the target time period.
Wherein the bandwidth change instruction is carried by a physical layer channel bandwidth indication channel. In an embodiment, the physical channel bandwidth indication channel is dedicated to send bandwidth change instructions to each node to be scheduled, that is, the physical channel bandwidth indication channel only carries the bandwidth change instructions, and does not carry other types of instructions. It is understood that, in other embodiments, the physical layer channel bandwidth indication channel may also be set to carry other instructions according to actual needs, and is not limited in any way herein.
The indication of system Bandwidth change is completed by a Bandwidth change instruction BWI (Bandwidth indication) transmitted on a physical Bandwidth indication channel pbwich (physical Bandwidth Indicator channel), and the bit number of BWI is 3, which can indicate at most 8 different target bandwidths. In one embodiment, the BWI corresponds to the target bandwidth as shown in table 2.
TABLE 2BWI and target Bandwidth mapping Table
After BWI is processed by channel coding, scrambling, modulation, layer mapping, and precoding, resources are mapped to the 6PRB at the center of the 1 st ofdm (orthogonal Frequency Division multiplexing) symbol of the communication frame (which may also be a communication subframe in some embodiments) for transmission, and the position of the time-Frequency resource mapping of the specific PBWICH channel is shown in fig. 7.
In contrast to the prior art, the method provided in the embodiment corresponding to fig. 1 of the present application, by determining a first target system bandwidth of each node to be scheduled in the wireless ad hoc network in a target time period and determining the priority of each node to be scheduled in the target time period, then according to the priority of each node to be scheduled in the target time interval, determining the first target system bandwidth corresponding to the node to be scheduled with the highest priority as the target bandwidth of the target time interval, and after determining the target bandwidth, informing at least part of the nodes to be scheduled to set their system bandwidth in the target period as the target bandwidth, and furthermore, on the premise of ensuring the communication quality, the coverage performance of the wireless network system in the target time period is improved by informing at least part of nodes to be scheduled to set the system bandwidth of the nodes in the target time period as the target bandwidth.
Referring to fig. 2, fig. 2 is a schematic flowchart illustrating another embodiment of a bandwidth adjustment method according to the present application, and the step S110 is emphasized in the embodiment corresponding to fig. 2. In the present embodiment, the step S110 of determining the first target system bandwidth corresponding to each node to be scheduled in the target time period includes:
s201: and acquiring the current bandwidth value, the signal-to-interference plus noise ratio and a first statistical threshold value and a second statistical threshold value which are configured in advance of each node to be scheduled.
When determining a first target system bandwidth corresponding to each node to be scheduled in a wireless ad hoc network in a target time period, firstly, respectively obtaining a current bandwidth value, a signal-to-interference-plus-noise ratio, a first statistical threshold value and a second statistical threshold value which are configured in advance of each node to be scheduled, so as to subsequently determine the first target system bandwidth and call the parameters. The current bandwidth value of each node to be scheduled can be directly obtained by analyzing the configuration signaling corresponding to each node to be scheduled, or can be obtained by detecting other related parameters for calculation.
The current bandwidth value of each node to be scheduled refers to a system bandwidth value of the node to be scheduled in the current time period, and the first statistical threshold value and the second statistical threshold value are preset threshold values which are set according to experience values and used for representing statistical times. The same first statistical threshold value and the same second statistical threshold value can be set for each node to be scheduled in the same wireless ad hoc network.
Further, the first statistical threshold is a preset number threshold for indicating that the first preset threshold is less than or equal to the current signal-to-interference-plus-noise ratio; the second statistical threshold is a preset number threshold for indicating that the signal to interference plus noise ratio is greater than or equal to a second preset threshold. The second preset threshold and the first preset threshold are empirical values of system bandwidth obtained by pre-measuring the current bandwidth value of the node to be scheduled.
The Signal to Interference plus Noise Ratio (SINR) refers to the Ratio of the received strength of a useful Signal to the received strength of an interfering Signal. Wherein the received interference signal comprises received noise and received interference. Further, in some embodiments, when the received interference cannot be determined, the SINR may also be replaced by obtaining a signal-to-noise ratio (signal-to-noise ratio), which is a proportional relation parameter describing the effective component and the noise component in the signal.
S202: and acquiring a first preset threshold and/or a second preset threshold corresponding to the current bandwidth value.
After the current bandwidth value of each node to be scheduled is obtained, a first preset threshold and/or a second preset threshold corresponding to the current bandwidth value are/is further determined according to the obtained current bandwidth value. It should be noted that, in some embodiments, in the technical scheme provided by the present application, the current bandwidth value may not have a corresponding first preset threshold or second preset threshold. As illustrated in Table 1In the preferred embodiment, the current bandwidth value BWcurrentAt 20MHz, there is no second preset threshold SINRupWhen the current bandwidth value is 1.4MHz, the first preset threshold SINR does not existdown。
The first preset threshold is a threshold for representing a signal to interference plus noise ratio that needs to reduce the system bandwidth, and if the current signal to interference plus noise ratio is less than or equal to the first preset threshold, it indicates that the current signal to interference plus noise ratio is smaller, and further the signal to interference plus noise ratio needs to be improved. If the current signal to interference plus noise ratio is smaller than the first preset threshold value, judging to obtain a current system bandwidth value needing to be reduced, after the current system bandwidth value needing to be reduced is obtained, not immediately reducing the current system bandwidth value, but further counting the times of meeting the requirement of reducing the system bandwidth value, judging whether the times of meeting the requirement of reducing the system bandwidth is larger than or equal to the first statistical threshold value, and if so, correspondingly reducing the current system bandwidth; the second preset threshold is a threshold for representing a signal to interference plus noise ratio that needs to increase the system bandwidth, and if the current signal to interference plus noise ratio is greater than the second preset threshold, it indicates that the current signal to interference plus noise ratio is greater, and further the signal to interference plus noise ratio needs to be adjusted downward. That is, if it is determined that the current signal to interference plus noise ratio is greater than the second preset threshold, it is determined that the current system bandwidth value needs to be increased, but according to the technical scheme provided by the present application, after it is determined that the current system bandwidth value needs to be increased, the current system bandwidth value does not need to be increased immediately, but the number of times that the system bandwidth value needs to be increased is further counted, and it is determined whether the number of times that the system bandwidth needs to be increased is greater than or equal to the second statistical threshold, if so, the current system bandwidth is correspondingly increased, and specifically, see the detailed description of the embodiment part corresponding to fig. 3 and fig. 4 below.
Further, please refer to table 1, where table 1 is a corresponding relationship between a current bandwidth value, a first preset threshold value, and a second preset threshold value preset in an embodiment.
TABLE 1 table of correspondence between current bandwidth value, first preset threshold value and second preset threshold value
Wherein, BWcurrent represents current bandwidth value, "- - - - - - - -" represents first preset threshold or second preset threshold does not exist, SINRbwi_mcs0(i is 1.4,3,5,10,15,20) represents the modulation and coding strategy MCS is 0 demodulation threshold and SINR when the current bandwidth value of the system is 1.4MHz, 3MHz, 5MHz, 10MHz, 15MHz, 20MHz, respectivelydeltaA configurable SINR offset is indicated for correcting the simulated SINR threshold.
S203: and determining a first target system bandwidth corresponding to each node to be scheduled according to the signal-to-interference-plus-noise ratio of each node to be scheduled, the first statistical threshold, the second statistical threshold and the first preset threshold and/or the second preset threshold.
After the signal-to-interference-plus-noise ratio, the first statistical threshold, the second statistical threshold, and the first preset threshold and/or the second preset threshold of each node to be scheduled are obtained, a first target system bandwidth corresponding to each node to be scheduled in a target time period is further determined. Specifically, the details of determining the first target system bandwidth in step S203 may be referred to as detailed below in corresponding parts of fig. 3 and 4.
Further, please refer to fig. 3, wherein fig. 3 is a schematic flowchart of a bandwidth adjustment method according to another embodiment of the present application. In the present embodiment, it is emphasized that the step S203 further includes steps S301 to S304, respectively, of determining the first target system bandwidth corresponding to each node to be scheduled according to the signal-to-interference-plus-noise ratio of each node to be scheduled, the first statistical threshold, the second statistical threshold, and the first preset threshold and/or the second preset threshold.
S301: and determining whether a first preset threshold exists according to the current bandwidth value.
After the current bandwidth value, the signal-to-interference-plus-noise ratio, the pre-configured first statistical threshold value and the pre-configured second statistical threshold value of each node to be scheduled are obtained and the first preset threshold value and/or the second preset threshold value corresponding to the current bandwidth value are/is determined, according to the current bandwidth value of each node to be scheduled, the current bandwidth value and the corresponding table of the first preset threshold value are inquired to determine whether the current bandwidth value has the first preset threshold value corresponding to the current bandwidth value. As described above, in the technical solution provided by the present application, the first preset threshold and/or the second preset threshold may be preset to different bandwidth values according to empirical values.
In the current embodiment, if it is determined through query that the current bandwidth value does not have the corresponding first preset threshold, step S401 in fig. 4 is executed, otherwise, if it is obtained through query that the current bandwidth value has the corresponding first preset threshold, the first preset threshold is further obtained, and step S302 is executed.
S302: and judging whether the signal-to-interference-plus-noise ratio is less than or equal to a first preset threshold value or not.
If the first preset threshold exists, the first preset threshold is obtained, and whether the signal to interference plus noise ratio is smaller than the first preset threshold is judged, that is, whether the current signal to interference plus noise ratio is smaller than a preset threshold of the signal to interference plus noise ratio requiring reduction of the system bandwidth is judged. If the signal to interference plus noise ratio of the current node to be scheduled is less than or equal to the first preset threshold, it is indicated that the signal to interference plus noise ratio of the current node to be scheduled is greater than the set lower limit value of the signal to interference plus noise ratio, and at this time, the bandwidth of the node to be scheduled needs to be adjusted, so that the signal to interference plus noise ratio of the scheduling node is adjusted to be greater than or equal to the set lower limit value, otherwise, if the signal to interference plus noise ratio is greater than the first preset threshold, the current bandwidth value of the node to be scheduled is output as the first target system bandwidth. When the signal to interference plus noise ratio is smaller than the first predetermined threshold, the following step S303 is executed.
S303: and updating the statistical times of reducing the system bandwidth, and further judging whether the statistical times of reducing the system bandwidth is greater than or equal to a first statistical threshold value.
If the current signal to interference plus noise ratio of the node to be scheduled is less than or equal to the first preset threshold, judging that the condition of reducing the system bandwidth is met at the moment, and adding one to the statistical frequency of reducing the system bandwidth so as to update the statistical frequency of reducing the system bandwidth. After updating the statistical times of reducing the system bandwidth, further judging whether the statistical times of reducing the system bandwidth is larger than or equal to a first statistical threshold value. The counting times for reducing the system bandwidth refers to the times for reducing the bandwidth value of the node to be scheduled.
If the statistical frequency of the reduced system bandwidth is greater than or equal to the first statistical threshold, the following step S304 is executed, otherwise, if the statistical frequency of the reduced system bandwidth is smaller than the first statistical threshold, the bandwidth of the node to be scheduled is kept unchanged, or it can be understood that the current bandwidth value of the node to be scheduled is selected as the first target system bandwidth.
S304: and selecting the maximum preset system bandwidth smaller than the current bandwidth value as a first target system bandwidth.
And if the statistical times of reducing the system bandwidth is greater than or equal to the first statistical threshold value, selecting the maximum preset system bandwidth smaller than the current bandwidth value as a first target system bandwidth. The preset system bandwidth is a preset bandwidth when each node in the wireless ad hoc network performs data interaction. In step S304, a maximum value is selected from the preset system bandwidths smaller than the current bandwidth value, and the maximum value is output as a first target system bandwidth of the node to be scheduled in the target time period.
In the current embodiment, after the statistics number of times of reducing the system bandwidth is greater than or equal to the first statistical threshold, the bandwidth of the node to be scheduled in the target time period is adjusted, so that the coverage performance of the wireless network system in the target time period can be further improved on the premise of ensuring the stability and the communication quality of the wireless ad hoc network.
Referring to fig. 4, fig. 4 is a schematic flowchart illustrating a bandwidth adjustment method according to another embodiment of the present application. Illustrated in the current embodiment is that after step S301 in fig. 3, the method provided by the present application further includes:
s401: if the first preset threshold value does not exist, whether a second preset threshold value exists or not is further judged.
If it is determined in step S301 that the first preset threshold does not exist, it is further determined whether a second preset threshold corresponding to the current bandwidth value of the node to be scheduled exists.
S402: and judging whether the signal-to-interference-plus-noise ratio is greater than or equal to a second preset threshold value or not.
If the second preset threshold is obtained through judgment, the second preset threshold is obtained, and whether the current signal to interference plus noise ratio of the node to be scheduled is larger than or equal to the second preset threshold is judged, namely whether the current signal to interference plus noise ratio is larger than or equal to the preset threshold value of the signal to interference plus noise ratio for increasing the system bandwidth is judged. If the signal to interference plus noise ratio of the current node to be scheduled is greater than or equal to the second preset threshold, it is indicated that the signal to interference plus noise ratio of the current node to be scheduled is greater than the set upper limit value of the signal to interference plus noise ratio, at this time, the bandwidth of the node to be scheduled needs to be increased to lower the signal to interference plus noise ratio so that the signal to interference plus noise ratio of the scheduling node is less than or equal to the set upper limit value, otherwise, if the signal to interference plus noise ratio of the current node to be scheduled is less than the second preset threshold, the current bandwidth value of the node to be scheduled is output as the first target system bandwidth. When the signal to interference plus noise ratio is greater than the first predetermined threshold, the following step S403 is performed.
S403: and updating the statistical times of the increased system bandwidth, and further judging whether the statistical times of the increased system bandwidth is greater than or equal to a second statistical threshold value.
If the current signal to interference plus noise ratio of the node to be scheduled is greater than or equal to the second preset threshold, the condition of increasing the system bandwidth is obtained by judgment, so that the statistical frequency of increasing the system bandwidth is increased by one to update the statistical frequency of increasing the system bandwidth. After updating the statistical times of the increased system bandwidth, further judging whether the statistical times of the increased system bandwidth is greater than or equal to a second statistical threshold value. The statistical times for increasing the system bandwidth refers to the times for increasing the bandwidth value of the node to be scheduled.
If the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold value, the following step S404 is executed, otherwise, if the statistical frequency of the increased system bandwidth is smaller than the second statistical threshold value, the bandwidth of the node to be scheduled is kept unchanged, or it can be understood that the current bandwidth value of the node to be scheduled is selected as the first target system bandwidth.
S404: and selecting the minimum preset system bandwidth which is larger than the current bandwidth value as a first target system bandwidth.
And if the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold value, selecting the minimum preset system bandwidth which is greater than the current bandwidth value as a first target system bandwidth. As described above, the preset system bandwidth is a preset bandwidth when each node in the wireless ad hoc network performs data interaction. In step S404, a minimum value is selected from the preset system bandwidths larger than the current bandwidth value, and the minimum value is output as a first target system bandwidth of the node to be scheduled in the target time period.
In the current embodiment, after the statistics number of increasing the system bandwidth is greater than or equal to the second statistics threshold, the bandwidth of the node to be scheduled in the target time period is adjusted, so that the coverage performance of the wireless network system in the target time period can be further improved on the premise of ensuring the stability and the communication quality of the wireless ad hoc network.
In another embodiment, in the method provided by the present application, when determining the first target system bandwidth of each node to be scheduled in the target time period, it may further be determined whether a second preset threshold exists, and when determining that the second preset threshold exists, it is further determined whether the current signal to interference plus noise ratio of the current node to be scheduled is greater than or equal to the second preset threshold, and if it is determined that the signal to interference plus noise ratio is greater than or equal to the second preset threshold, the statistical number of times of increasing the system bandwidth is updated, and it is further determined whether the statistical number of times of increasing the system bandwidth is greater than or equal to the second statistical threshold.
Furthermore, after determining that there is no corresponding second preset threshold of the current system bandwidth value, the method provided by the present application further includes: if the second preset threshold value does not exist, further judging whether a first preset threshold value corresponding to the current system bandwidth value exists, and further judging whether the current signal to interference plus noise ratio of the node to be scheduled is smaller than or equal to the first preset threshold value after the first preset threshold value is judged to exist; if the current signal to interference plus noise ratio is judged to be smaller than or equal to a first preset threshold value, updating the statistical times of reducing the system bandwidth, and further judging whether the updated statistical times of reducing the system bandwidth is larger than or equal to the first statistical threshold value; and if the statistical times of reducing the system bandwidth is greater than or equal to the first statistical threshold value, selecting the maximum preset system bandwidth smaller than the current bandwidth value as a first target system bandwidth. The specific details may correspond to the descriptions with reference to corresponding parts of fig. 3 and 4, respectively.
Meanwhile, in the technical scheme provided by the application, the signal transmission power on the unit bandwidth is changed by changing the system bandwidth, which simultaneously brings about the change of the signal transmission power on the reference signal, the control channel and the traffic channel. Specifically, when the channel quality in the wireless ad hoc network is poor, the signal transmission power on a unit bandwidth can be increased by reducing the bandwidth, and further the edge coverage performance and the remote distance of the mesh wireless ad hoc network are increased; and when the channel quality in the wireless ad hoc network becomes good, the interference can be reduced by increasing the bandwidth, and further the edge coverage of the MESH wireless ad hoc network is enhanced. When the technical scheme is executed, the throughput among the network nodes of the MESH wireless ad hoc network is also better increased. For example, when the channel quality of the node to be scheduled is very good, the technical solution provided by the present application may increase the system bandwidth, which may result in a multiple increase of throughput between nodes.
Please refer to fig. 5, fig. 5 is a schematic structural diagram of an embodiment of a communication device according to the present application. In the current embodiment, the communication device 500 provided by the present application includes a processor 501, a memory 502, and a communication circuit 503, and the memory 502 and the communication circuit 503 are respectively connected to the processor 501. The communication device 500 may be a node that performs the bandwidth adjustment method described in any one of the embodiments of fig. 1 to 4 and the corresponding embodiments thereof, or the node to be scheduled described in any one of the embodiments of fig. 1 to 4 and the corresponding embodiments thereof.
The processor 501 is connected to the memory 502 and the communication circuit 503.
The communication circuit 503 is used for communicating with an external communication device (which may also be understood as other nodes in a wireless ad hoc network) under the control of the processor 501 to perform data or instruction transmission.
The memory 502 includes a local storage and stores a computer program, and the computer program can implement the bandwidth adjusting method as described in any one of the embodiments of fig. 1 to 4 and the corresponding embodiments when executed by the processor 501.
The processor 501 is configured to execute the computer program stored in the memory 502 to execute the bandwidth adjusting method described in any one of fig. 1 to 4 and the corresponding embodiments.
Further, when the communication apparatus 500 is a node in a wireless ad hoc network, the communication apparatus 500 includes any one of a routing device, a walkie-talkie, a mobile terminal, or other devices that can perform a communication function.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an embodiment of a computer-readable storage medium according to the present application. The storage medium 600 stores program data 601, which program data 601 when executed implements the bandwidth adjustment method as described above and the methods described in the various embodiments. Specifically, the storage medium 600 may be one of a memory, a personal computer, a server, a network device, or a usb disk.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A method of bandwidth adjustment, the method comprising:
determining a first target system bandwidth of each node to be scheduled in a target time period;
determining the priority of each node to be scheduled in the target time interval;
determining the first target system bandwidth corresponding to the node to be scheduled with the highest priority as the target bandwidth of the target time interval;
notifying at least part of the nodes to be scheduled to set their system bandwidth in the target time period as the target bandwidth.
2. The method of claim 1, wherein the notifying at least some of the nodes to be scheduled to set their system bandwidths to the target bandwidth in the target time period further comprises:
and sending a bandwidth change instruction to at least part of the nodes to be scheduled, wherein the bandwidth change instruction is used for informing the at least part of the nodes to be scheduled to change the system bandwidth of the nodes to be scheduled in the target time period to the target bandwidth.
3. The method of claim 2,
the bandwidth change instruction is carried by a physical layer channel bandwidth indication channel.
4. The method of claim 1, wherein determining the first target system bandwidth of each node to be scheduled in the target time period comprises:
acquiring a current bandwidth value, a signal-to-interference plus noise ratio, a first statistical threshold value and a second statistical threshold value which are configured in advance of each node to be scheduled;
acquiring a first preset threshold and/or a second preset threshold corresponding to the current bandwidth value;
and determining the first target system bandwidth corresponding to each node to be scheduled according to the signal-to-interference-plus-noise ratio, a first statistical threshold, the second statistical threshold, the first preset threshold and/or the second preset threshold of each node to be scheduled.
5. The method according to claim 4, wherein the first preset threshold and the second preset threshold are empirical values of system bandwidth measured in advance according to a current bandwidth value of the node to be scheduled, the first preset threshold is a threshold for characterizing a signal to interference plus noise ratio for reducing system bandwidth, and the second preset threshold is a threshold for characterizing a signal to interference plus noise ratio for increasing system bandwidth.
6. The method according to claim 4, wherein the determining the first target system bandwidth corresponding to each node to be scheduled according to the signal-to-interference-plus-noise ratio, a first statistical threshold, the second statistical threshold, and the first preset threshold and/or the second preset threshold of each node to be scheduled respectively further comprises:
determining whether the first preset threshold exists according to the current bandwidth value;
if the first preset threshold exists, judging whether the signal-to-interference-plus-noise ratio is smaller than or equal to the first preset threshold;
if the signal to interference plus noise ratio is smaller than or equal to the first preset threshold, updating the statistical times of reducing the system bandwidth, and further judging whether the statistical times of reducing the system bandwidth is larger than or equal to the first statistical threshold;
if the statistical frequency of the reduced system bandwidth is greater than or equal to the first statistical threshold value, selecting the maximum preset system bandwidth smaller than the current bandwidth value as the first target system bandwidth;
after the determining whether the first preset threshold exists, the method further comprises;
if the first preset threshold does not exist, whether the second preset threshold exists or not is further judged;
if the second preset threshold exists, judging whether the signal to interference plus noise ratio is larger than or equal to the second preset threshold;
if the signal to interference plus noise ratio is greater than or equal to the second preset threshold, updating the statistical frequency of the increased system bandwidth, and further judging whether the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold;
and if the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold value, selecting the minimum preset system bandwidth which is greater than the current bandwidth value as the first target system bandwidth.
7. The method according to claim 4, wherein the determining the first target system bandwidth corresponding to each node to be scheduled according to the signal-to-interference-plus-noise ratio, a first statistical threshold, the second statistical threshold, and the first preset threshold and/or the second preset threshold of each node to be scheduled respectively further comprises:
judging whether the second preset threshold exists or not;
if the second preset threshold exists, judging whether the signal-to-interference-plus-noise ratio is greater than or equal to the second preset threshold;
if the signal to interference plus noise ratio is greater than or equal to the second preset threshold, updating the statistical frequency of the increased system bandwidth, and further judging whether the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold;
if the statistical frequency of the increased system bandwidth is greater than or equal to the second statistical threshold value, selecting the minimum preset system bandwidth which is greater than the current bandwidth value as the first target system bandwidth;
after the determining whether the second preset threshold exists, the method further includes:
if the second preset threshold does not exist, further judging whether the first preset threshold exists or not;
if the first preset threshold exists, judging whether the signal-to-interference-plus-noise ratio is smaller than or equal to the first preset threshold;
if the signal to interference plus noise ratio is smaller than or equal to the first preset threshold, updating the statistical times of reducing the system bandwidth, and further judging whether the statistical times of reducing the system bandwidth is larger than or equal to the first statistical threshold;
and if the statistical times of reducing the system bandwidth is greater than or equal to the first statistical threshold value, selecting the maximum preset system bandwidth smaller than the current bandwidth value as the first target system bandwidth.
8. The method of claim 1, wherein the determining the current corresponding priority of each node to be scheduled further comprises:
calculating and determining the current corresponding priority of each node to be scheduled according to the following formula;
wherein, PtrafficIs the service priority factor, Throughput, of the node to be scheduledhistoryIs the historical average transmission rate, scheduled interval, of the node to be scheduledhistoryIs the historical average scheduling time interval of the node to be scheduled, alpha and beta are preconfigured weight factors, and the BSR is a buffer status report.
9. A communication device, comprising a memory, a processor, and a communication circuit, the memory and the communication circuit being respectively coupled to the processor, wherein the communication circuit is connected to the processing circuit, and the communication circuit performs data interaction with an external communication device under the control of the processor;
the memory includes local storage and stores a computer program;
the processor is configured to run the computer program to perform the method of any one of claims 1 to 8.
10. A computer-readable storage medium, characterized in that the storage medium stores a computer program executable by a processor for implementing the method of any one of claims 1-8.
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