CN107949011A - A kind of adaptive perception window regulation method - Google Patents
A kind of adaptive perception window regulation method Download PDFInfo
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- CN107949011A CN107949011A CN201711255396.4A CN201711255396A CN107949011A CN 107949011 A CN107949011 A CN 107949011A CN 201711255396 A CN201711255396 A CN 201711255396A CN 107949011 A CN107949011 A CN 107949011A
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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
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
- H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
- H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
- H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
- H04B7/0621—Feedback content
- H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
Abstract
Keep out of the way window difference to solve the competition of different priority levels node, cause channel condition information to have differences, the present invention proposes a kind of adaptive perception window regulation method.Node is perceiving completion channel condition information monitoring function in window.Using window is perceived, node mainly completes channel condition information monitoring and process of calculation analysis, contains channel condition information statistics and calculates, network basic parameter is predicted and perceived window and adaptively dynamically adjusts three processes.Window is perceived by setting independent channel condition information to monitor so that different priority levels node can obtain identical channel condition information.The beneficial effect of technical solution of the present invention is 1）：Propose and perceive the adaptive dynamic regulation rule of window；2）：Channel condition information perceives acquisition process independently of node type and channel access process.Present invention is adapted to different network environments, and the node of effective guarantee priority weights grade can obtain identical channel condition information.
Description
Technical field
The present invention relates to wireless communication data link-layer technologies field, is a kind of nothing for supporting handling capacity priority weights grade
Line channel state information measurement, suitable for network environment of the non-stop layer based on contention access channel.
Background technology
In existing wireless communication protocol prioritization scheme, all channel condition information is monitored, and according to acquisition
Network basic parameter data carry out the adjustment of corresponding access parameter.
In general, node selects backoff slot counts device in the range of competition window, the mistake then successively decreased in backoff counter
The monitoring of channel condition information is carried out in journey.In homogeneous network environments, due to the access parameter of node be it is consistent,
All nodes can preferably obtain identical channel condition information data.Supporting the network environment of handling capacity priority weights grade
In, the access parameter of different type node is different, and backoff slot counts device value range is different.Therefore, passed in backoff counter
Channel condition information monitoring is carried out during subtracting, the time range of different type node monitoring channel is different, and node can perceive
Channel condition information it is incomplete.
In prioritization scheme, channel condition information monitoring is carried out using fixed and bigger size window, and will monitoring
Data as current network basic parameter.This mode is not previously predicted network basic parameter, directly using monitoring numerical value as ginseng
Number uses, and parameter fluctuation amplitude can be caused big；By the way of fixed window size, it is only suitable for the network environment of specific scale,
The small scale network update cycle is grown, and large scale network performance is undesirable, and scalability is poor.
In handling capacity priority weights hierarchical network, the channel access parameter that different types of node uses has differences,
Backoff period size is different.Channel condition information monitoring, different type section are carried out in backoff period decrementing procedure
The time of point observation channel is different, and the channel condition information monitored also can be different.Node is according to respective channel
Status information adjusts channel access parameter, and it will cause error.Moreover, the error is not repairable, based on inaccurate letter
Channel state information data, even if being optimized using related algorithm to channel condition information data, effect is still undesirable.When adopting
With fixed and larger-size window monitoring channel condition information, it is impossible to the scalability got well.
For the network for supporting handling capacity priority weights grade, method proposed by the present invention proposes and perfect perceived window
Mouthful adaptive Adjusted Option, by being separately provided channel condition information perceptional function, independent node channel access procedure and letter
Channel state information perception, obtains precisely consistent channel condition information for different type node and provides a kind of feasible side
Case.
The content of the invention
In the network for supporting handling capacity priority weights grade QoS demand, the present invention provides a kind of the adaptive of perception window
Method of adjustment is answered, has been separately provided channel condition information monitoring function.Based on wireless communications environment, perceiving in window, node
Complete channel monitoring and obtain the functions such as channel condition information, mainly cover three kinds of functions：The monitoring calculation of channel condition information,
Network basic parameter is predicted and is perceived window and adaptively dynamically adjusts.
The technical solution adopted by the present invention is, a kind of to support the adaptive of priority weights grade to perceive window regulation method.
This method can effectively carry out radio channel status information measurement so that different type node can obtain identical channel status letter
Cease data.Perceiving in window, node mainly runs three kinds of functions, specific as follows：
1）Statistical function.Window size is perceived based on current, node progressively successively decreases according to free timeslot perceives window value.Herein
During, the data transfer activities in node monitoring channel, Successful transmissions event number and collision accident quantity in statistical channel；
2）Analyze forecast function.According to the data obtained in statistical function, the information of successfully transmission frame is analyzed, is obtained in network
Active node number and each active node send the number information of data frame.Current channel condition information is calculated, with
Preferred channels status information compares, and with reference to currently used network activity number of nodes information, predicts the active section points in network
Amount；
3）Parameter adjustment function.Active node quantity in the network predicted according to node, adjustment perceive the size of window.Then turn
Enter step 1）Statistical function.The active node quantity predicted can be directly used in the adjustment of competition window according to data transmission scenarios
In rule.
The features of the present invention and beneficial effect
In the present invention, the scope of application for perceiving window and function definition are given.It is competition-based to handle up in centerless insertion point
Measure under priority weights hierarchical network environment, set perception window to carry out special disposal channel condition information.So that the channel prison of node
Survey process transmitted independently of data in channel access process, meanwhile, the type of node is monitored and obtained for channel condition information
Take and also do not associate, so that all nodes can obtain identical channel condition information data.
The present invention can effectively solve the problems, such as that different type node acquisition channel condition information is different, be all kinds section
The Adjusted Option of the channel access parameter of point provides accurate channel condition information.
Brief description of the drawings
Fig. 1 channel state information measurement flow charts.
Fig. 2 channel condition information perception stage functional diagrams.
Embodiment
Present invention is generally directed to network environment it is as follows：Each node only produces a kind of data type in network.Inhomogeneity
Type node has the different grades of service, i.e. handling capacity priority weights grade.In present embodiment, with three kinds of different handling capacity power
Weight priority level carries out patent content elaboration, is respectively the high node of Throughput Class（NodeH）, the medium section of Throughput Class
Point（NodeM）The node low with Throughput Class（NodeL）.Priority level and low precedence section in high precedence node ratio
Point takes more channel resources.Using data transmission event（Data transfer collision accident or data sending success events）It
Between the metric parameter of average free timeslot interval as channel condition information.
Channel condition information computational methods are not limited to the quantity of the grade of service in the present invention.
Set high grade of service SH（Handling capacity priority level is high）, middle grade of service SM（In handling capacity priority level）With it is low
Grade of service SL（Throughput Class is low）Proportionate relationship it is as follows：
SH:SM:SL=βH: βM: βL
As shown in above formula, in a transmission cycle, if data frame length is equal, work as NodeLA data are have sent,
NodeHβ is then carried outH/βLThe transmission of secondary data, NodeMThen need to carry out βM/βLThe transmission of secondary data.
Node carries out access parameter adjustment using linear method（That is, CW parameter adjustments）
CWi≈θi·(N-1) (i∈(H, M, L))。
The handling capacity priority weights grade of node is set in the present invention to be identified by node address information.This hair
In bright, node monitors and have received the data frame of Successful transmissions in channel, parses received data frame information, obtains corresponding
Source node address is sent, the handling capacity priority weights grade of sending node is may determine that according to address information.If sent out in channel
Collision has been given birth to, then has only needed statistics collision accident number.Decision node Throughput Class information does not constrain the use model of the present invention
Enclose.
Based on formula（SH:SM:SL=βH: βM: βL）Setting, the present invention devise a kind of adaptive perception window tune
Adjusting method, it is characterised in that：This programme comprises the following steps：
The first step, statistical function.In the time slot decrementing procedure for perceiving window, the data of other nodes pass in node monitoring channel
Defeated activity.In detecting period scope EDInterior, by receiving the data transmission scenarios of other nodes in channel, node judges the number of channel
According to transmission state information.If sending collision in channel, statistics collision accident number EC.If number is successfully completed in channel
According to transmission, then from data frame, transmission source node address information is extracted, i-th of node of statistics successfully carries out data transmission total
Number ESi, and in EDReceived total successful data the number of transmissions E is inscribedS；
Second step, analyzes forecast function.Channel status is analyzed.When channel condition information perception terminates, node carries out channel
Status information analysis calculates.Node calculates event twice according to data transmission event information in the channel obtained in the first step
Between average free slot time quantity：
In above-mentioned calculating process, the data transmission event in channel is not monitored when node, then is believed without channel status
Breath calculates, using the parameter currently set.Number of nodes is predicted.Be calculated present channel average free slot time number it
Afterwards, number of nodes prediction is carried out using increasing amount adjustment mode：
NnewRepresent active node quantity in the network of prediction.NoldRepresent that active section is counted in present node network currently in use
Amount.noptOptimal free timeslot interval numerical value in the channel that expression can precalculate.When active node in the network of prediction
Numerical value of NnewLess than actual measurement number of nodes m, N is madenew=m；
3rd step, parameter adjustment.Node predicts active node numerical value of N in obtained network according to analysisnew, adjustment perception window
Numerical value：
DW=CWL=θL·（Nnew-1）
Window value will be perceived and be arranged to identical with the competition window of lowest priority node, compared with other rating-types
Compared with node can be caused to possess bigger perception window.
Above embodiment gives more specific feasible using and perceives window progress channel condition information monitoring
Acquisition methods, the competition window Adjusted Option that the inside includes, node type determination methods, channel state parameter, number of nodes increase
The not restricted application methods of the invention such as amount adjustment prediction mode.
The foregoing is merely the present invention than more typical embodiment, embodiments of the present invention and protection are not thereby limited
Scope, to those skilled in the art, should can appreciate that all with made by description of the invention and diagramatic content
Equivalent substitution and obviously change obtained scheme, should be included in protection scope of the present invention.
Claims (1)
- A kind of 1. adaptive perception window regulation method, it is characterised in that including：A kind of adaptive perception window regulation method for supporting priority weights grade is provided, covers three kinds of functions：Channel status is believed Monitoring and statistics function, network basic parameter analysis forecast function and the perception window parameter adaptive dynamic adjustment function of breath； Perceive in window, node completes channel information collection calculating, the prediction of network basic parameter and the function of perceiving window parameter adjustment；It is specific as follows：The first step：Statistical function；Window size is perceived based on current, node progressively successively decreases according to free timeslot perceives window number Value；In the process, the data transfer activities in node monitoring channel, Successful transmissions event number and collision in statistical channel Event number；Second step：Analyze forecast function；According to the data obtained in statistical function, the information of successfully transmission frame is analyzed, obtains net Active node number and each active node in network send the number information of data frame；Current channel condition letter is calculated Breath, compared with preferred channels status information, with reference to currently used network activity number of nodes information, predicts the active section in network Point quantity；3rd step：Parameter adjustment function；Active node quantity in the network predicted according to node, adjustment perceive the size of window； Then it is transferred to 1）The step of statistical function.
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| CN109309927A (en) * | 2018-12-22 | 2019-02-05 | 石春 | Radio channel information perceives window and method of adjustment |
| CN111294942A (en) * | 2019-03-29 | 2020-06-16 | 展讯半导体(南京)有限公司 | Method and device for determining and sending sensing window length, storage medium, terminal and base station |
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