CN105898873B - The distribution method and device and data transmission method and device of data frame - Google Patents
The distribution method and device and data transmission method and device of data frame Download PDFInfo
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- CN105898873B CN105898873B CN201610201874.2A CN201610201874A CN105898873B CN 105898873 B CN105898873 B CN 105898873B CN 201610201874 A CN201610201874 A CN 201610201874A CN 105898873 B CN105898873 B CN 105898873B
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- 238000009826 distribution Methods 0.000 title claims abstract description 58
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- 238000001514 detection method Methods 0.000 claims description 57
- 238000003860 storage Methods 0.000 claims description 37
- 238000004364 calculation method Methods 0.000 claims description 15
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W74/00—Wireless channel access
- H04W74/08—Non-scheduled access, e.g. ALOHA
- H04W74/0833—Random access procedures, e.g. with 4-step access
- H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
- H04W74/085—Random access procedures, e.g. with 4-step access with collision treatment collision avoidance
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Abstract
The embodiment of the invention provides a kind of distribution methods of data frame and device and data transmission method and device, the distribution method of data frame includes: that the perception frame and transmission frame of current frame period are distributed to the LTE user terminal in LTE system base station range according to perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period calculated in the previous frame period；After detecting that LTE user terminal successfully completes data transmission, the frame of keeping out of the way of current frame period is distributed into LTE user terminal, so that its basis is kept out of the way frame and keeps out of the way channel out.The distribution method and device and data transmission method and device of data frame provided in an embodiment of the present invention, one, which is increased, on the basis of the frame of existing LTE system keeps out of the way frame, by the Channel occupancy rate for reducing LTE system, promote the Channel occupancy rate and handling capacity of wlan system, make wlan system can be good at coexisting with LTE system, while also improving the utilization rate of unauthorized frequency range.
Description
Technical field
The present invention relates to wireless communication technology fields, more particularly to the distribution method and device and number of a kind of data frame
According to transmission method and device.
Background technique
With the explosive growth of mobile mobile Internet and high broadband data service, mobile data flow, mobile terminal
Several and mechanical terminations connection number increases in blowout.
Prior art discloses a kind of LAA (access is assisted in Licensed-Assisted Access, authorization) technology, the skills
Art using LTE system by being connect under WLAN (Wireless Local Area Networks, WLAN) system environments
Enter the mode of unauthorized frequency range, to increase more available frequency spectrum, meets the needs of users.
The access procedure master of existing LTE (Long Term Evolution, Long Term Evolution) the unauthorized frequency range of system
It to be carried out by way of listem-before-talk, the frame of usual LTE system includes perception two parts of frame and transmission frame, and perception frame is used for
Whether the channel of the current unauthorized frequency range of perception is in idle condition, if be in idle condition, LTE system accesses the letter
Road, and data are transmitted by transmission frame.
But due to wlan system abide by MAC (Media Access Control, media access control) layer protocol, be with
Channel is occupied with the competitive way kept out of the way of conflict, and LTE system is without conflict avoidance mechanism, in wlan system and LTE system
When altogether depositing, wlan system will appear the case where frequently keeping out of the way, and LTE system can occupy channel for a long time, lead to wlan system
Channel occupancy rate and handling capacity sharp fall, reduce the channel utilization of unauthorized frequency range.
Summary of the invention
The distribution method for being designed to provide a kind of data frame and device and data transmission method of the embodiment of the present invention
The utilization rate of unauthorized frequency range is improved with device to solve wlan system and LTE system coexistence problems.
To achieve the above object, the embodiment of the invention provides a kind of distribution methods of data frame, are applied to LTE system base
Controller in standing, which comprises
It, will according to perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period calculated in the previous frame period
The perception frame and transmission frame of the current frame period distribute to the LTE user terminal in the LTE system base station range；Its
In, whether the perception frame is in idle condition for LTE user terminal detection current time channel；The transmission frame is used for
LTE user terminal carries out data transmission；
After detecting that LTE user terminal successfully completes data transmission, the frame of keeping out of the way of the current frame period is distributed to
The LTE user terminal makes it keep out of the way frame according to and keeps out of the way the channel out.
Preferably, perception frame, transmission frame and the slot length for keeping out of the way frame of current frame period, calculate as follows:
According to the channel occupancy information of collected unauthorized frequency range in the first scheduled duration before current time and
The channel occupancy information of historical storage calculates perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period.
Preferably, the channel occupancy information includes:, LTE system attempts access number, LTE system is successfully accessed number,
Wlan system fights for a number and wlan system fights for handling capacity a little；
The channel occupancy information of collected unauthorized frequency range in first scheduled duration according to before current time
And the channel occupancy information of historical storage calculates the slot length for keeping out of the way frame of the current frame period, comprising:
Access number is attempted according to the LTE system of unauthorized frequency range in the first scheduled duration before collected current time
It is successfully accessed number with LTE system, calculates successfully access probability；
According to being successfully accessed with described in the channel occupancy information for being successfully accessed historical storage described in probability search
The wlan system of probability match fights for a number；
A number is fought for according to the wlan system to search under the number same number fought for the wlan system a little
Wlan system fights for handling capacity a little, and fights under the number same number that number a little adds one with the wlan system
Wlan system fights for handling capacity a little；
According to formulaKeep out of the way the slot length of frame described in calculating；
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed with described
Probability PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for
Point number adds one number, SnIt is fought for a little to fight for the wlan system under number n same number a little with the wlan system
Handling capacity, Sn+1To be successfully accessed probability P with describedsucMatched wlan system fights for the identical number of number n+1 that a number adds one
Now wlan system fights for handling capacity a little.
Preferably, the handling capacity that the wlan system fights for a number and the wlan system is fought for a little arrives for real-time reception
Wlan system base station send information.
Preferably, the channel of collected unauthorized frequency range accounts in first scheduled duration according to before current time
The slot length of the perception frame of the current frame period is calculated with the channel occupancy information of information and historical storage, comprising:
The channel of unauthorized frequency range is in idle condition and establishes dualism hypothesis model with the case where busy state；
The detection probability and false alarm probability of LTE user terminal are calculated according to the dualism hypothesis model；
The average throughput of lower LTE system is in idle condition according to channel described in the detection probability and false alarm probability calculation
Amount and the channel are in the average throughput of LTE system under busy state；
According to formulaAnd it is calculated by traversal
Method calculates the slot length T of the perception framesense；
Wherein, TbackFor the slot length for keeping out of the way frame of the current frame period, T is the slot length in the frame period, R0
The average throughput of lower LTE system, R are in idle condition for the channel1LTE system under busy state is in for the channel
The average throughput of system, PdFor detection probability,For detection probability threshold value.
Preferably, the channel of collected unauthorized frequency range accounts in first scheduled duration according to before current time
The slot length of the transmission frame of the current frame period is calculated with the channel occupancy information of information and historical storage, comprising:
According to formula Ttrans=T-Tback-TsenseCalculate the slot length T of the transmission frametrans；
Wherein, TsenseFor the slot length of the perception frame of the current frame period, TbackFor moving back for the current frame period
The slot length of frame is kept away, T is the slot length in the frame period.
Preferably, the method also includes:
After detecting that LTE user terminal is not successfully completed data transmission, it is next to distribute to the LTE user terminal
The perception frame and transmission frame in frame period.
The embodiment of the invention also provides a kind of data transmission methods, are applied to LTE user terminal, which comprises
Obtain the perception frame and transmission frame of the controller distribution in LTE system base station；The perception frame and transmission frame are
The controller distributes to LTE user in the perception frame, the transmission frame and when keeping out of the way the slot length of frame that calculate current frame period
Terminal；
Whether it is in idle condition according to perception frame detection channel；
When detecting that channel is in idle condition according to the perception frame of the controller distribution in LTE system base station, access
The channel, and carried out data transmission according to the transmission frame that the controller distributes；
After successfully completing data transmission, receives and keep out of the way frame from controller distribution, and kept out of the way according to described
Frame keeps out of the way the channel out.
The embodiment of the invention also provides a kind of distributor of data frame, applied to the controller in LTE system base station,
Described device includes:
First perception frame and transmission frame distribution module, for the perception according to the current frame period calculated in the previous frame period
The perception frame and transmission frame of the current frame period are distributed to the LTE system by frame, transmission frame and the slot length for keeping out of the way frame
LTE user terminal in base station range；Wherein, the perception frame is for LTE user terminal detection current time channel
It is no to be in idle condition；The transmission frame carries out data transmission for LTE user terminal；
Keep out of the way frame distribution module, for when detect LTE user terminal successfully complete data transmission after, by the present frame
The frame of keeping out of the way in period distributes to the LTE user terminal, so that it is kept out of the way frame according to and keeps out of the way the channel out.
The embodiment of the invention also provides a kind of data transmission devices, are applied to LTE user terminal, and described device includes:
It perceives frame and transmission frame obtains module, for obtaining the perception frame and biography of the distribution of the controller in LTE system base station
Defeated frame；The perception frame and transmission frame are the controller in the perception frame for calculating current frame period, transmission frame and keep out of the way
When the slot length of frame, LTE user terminal is distributed to；
Channel detection module, for whether being in idle condition according to perception frame detection channel；
Data transmission module, for being detected at channel when according to the perception frame of the controller distribution in LTE system base station
When idle state, the channel is accessed, and carry out data transmission according to the transmission frame that the controller distributes；
Channel keeps out of the way module, for receiving keeping out of the way from controller distribution after successfully completing data transmission
Frame, and the channel out is kept out of the way according to the frame of keeping out of the way.
The distribution method and device and data transmission method and device of this data frame provided in an embodiment of the present invention,
One is increased on the basis of the frame of existing LTE system and keeps out of the way frame, by reducing the Channel occupancy rate of LTE system, is promoted
The Channel occupancy rate and handling capacity of wlan system, make wlan system can be good at coexisting with LTE system, while also improving non-
The utilization rate of authorized spectrum band.Certainly, it implements any of the products of the present invention or method must be not necessarily required to reach described above simultaneously
All advantages.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the first flow chart of the distribution method of data frame provided in an embodiment of the present invention；
Fig. 2 is the schematic diagram that time frame coexists in wlan system provided in an embodiment of the present invention and LTE system；
Fig. 3 is second of flow chart of distribution method of data frame provided in an embodiment of the present invention；
Fig. 4 is the slot length calculation method for keeping out of the way frame in the distribution method of data frame provided in an embodiment of the present invention
Flow chart；
Fig. 5 is the slot length calculation method of the perception frame in the distribution method of data frame provided in an embodiment of the present invention
Flow chart；
Fig. 6 is the flow chart of data transmission method provided in an embodiment of the present invention；
Fig. 7 is the first structural schematic diagram of the distributor of data frame provided in an embodiment of the present invention；
Fig. 8 is second of structural schematic diagram of the distributor of data frame provided in an embodiment of the present invention；
Fig. 9 is the knot for keeping out of the way frame slot length computation unit in the distributor of data frame provided in an embodiment of the present invention
Structure schematic diagram；
Figure 10 is the perception frame slot length computation unit in the distributor of data frame provided in an embodiment of the present invention
Structural schematic diagram；
Figure 11 is the structural schematic diagram of data transmission device provided in an embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
Embodiment one
As shown in Figure 1, being the first flow chart of the distribution method of data frame provided in an embodiment of the present invention, this method application
Controller in LTE system base station, principle are as follows: keep out of the way frame by increasing by one in the frame of existing LTE system, make it
With wlan system when coexisting, keep out of the way channel out after completing a data transmission, to increase the progress of wlan system busy channel
The chance of data transmission, improves the utilization rate of channel on the whole.The distribution method of the data frame includes:
S110, according to the perception frame of the current frame period calculated in the previous frame period, transmission frame and keep out of the way frame time slot it is long
The perception frame and transmission frame of the current frame period are distributed to the end of the LTE user in the LTE system base station range by degree
End；Wherein, whether the perception frame is in idle condition for LTE user terminal detection current time channel；The transmission frame
Carry out data transmission for LTE user terminal.
Specifically, the frame period of LTE system is the slot length (being indicated with T) of a whole frame, and the time slot in frame period is long
Degree T's can provide that (such as mac-layer protocol) is configured according to different protocol versions, can also be with self-setting, such as 20 milliseconds.
The frame period of LTE system is divided into perception frame, transmission frame and keeps out of the way frame three parts, wherein perception frame is used for LTE user terminal
Whether the channel of the current unauthorized frequency range of detection is in idle condition, and transmission frame transmits data for LTE user terminal, keeps out of the way
Frame keeps out of the way channel out for LTE user terminal.Perception frame, transmission frame and keep out of the way frame slot length (definition perception frame slot it is long
Degree is Tsense, transmission frame slot length be TtransAnd keeping out of the way the slot length of frame is Tback) can be fixedly installed, it can also basis
Different situations is by calculating specific setting.For example, the slot length T of perception framesenseFor 1 millisecond, the gap length of transmission frame
TtransFor 10 milliseconds and keep out of the way the slot length T of framebackIt is 9 milliseconds.Preferably, the perception in distribution current frame period
Frame, transmission frame and before keeping out of the way frame, the controller in LTE system base station has calculated the specific length of these three frames, and
And each frame period requires to calculate, therefore the calculating process of current frame period needs to complete in a frame period on it.
Further, after LTE user terminal enters in LTE system base station range, LTE system base station can be distributed to
Perception frame and transmission frame in the LTE user terminal frame period, the LTE user terminal unauthorized frequency range current according to perception frame detection
Channel whether be in idle condition, if present channel is in idle condition, LTE user terminal accesses the channel, goes forward side by side
The transmission of row data, if detecting that present channel is in busy state, LTE user terminal does not transmit number on transmission frame
According to.
It is worth noting that, LTE user terminal is when carrying out detection channel status according to perception frame, there are certain false alarms
Whether probability, the i.e. testing result of LTE user terminal are correct.For example, LTE user terminal detects that present channel is in idle shape
State, and practical upper signal channel is in busy state, then this time testing result is error result, and LTE user terminal will not pass
Carry out data transmission on defeated frame.In the present embodiment, false alarm probability according to perception frame slot length be negatively correlated, perceive frame when
The more long then false alarm probability of gap length is smaller.
The current frame period is kept out of the way frame point after detecting that LTE user terminal successfully completes data transmission by S120
LTE user terminal described in dispensing makes it keep out of the way frame according to and keeps out of the way the channel out.
Specifically, it is above-mentioned successfully complete data transmission refer to LTE user terminal successfully complete transmission frame time slot it is long
The data of degree are transmitted, and when LTE user terminal perceives, present channel is busy state or to perceive present channel be idle
State but when being practically at busy state (i.e. false alarm), cannot successfully complete data transmission.
After the controller in LTE system base station detects that LTE user terminal successfully completes data transmission, this is distributed to
Keep out of the way frame in LTE user terminal current frame period, LTE user terminal keeps out of the way frame according to this, keep out of the way channel out, and WLAN user
Terminal can carry out detection and data transmission in the slot length for keeping out of the way frame, increase the machine of wlan system busy channel in this way
Meeting makes wlan system can be good at coexisting with LTE system.
As shown in Fig. 2, the schematic diagram of time frame coexists for wlan system provided in an embodiment of the present invention and LTE system.Wherein,
Upper figure is the frame structure of wlan system, and the following figure is the frame structure of LTE system, and horizontal axis is the time.LTE system base station is according to user
The success or not of terminal channel state-detection perceives different modes and distributes to user terminal frame period (its slot length is T)
In perception frame (its slot length be Tsense), transmission frame (its slot length be Ttrans) and keep out of the way frame (its slot length is
Tback)。
When LTE user terminal detects that present channel is idle by perceiving frame, channel is accessed, is carried out by transmission frame
Data are transmitted, and LTE user terminal keeps out of the way channel out according to frame is kept out of the way after transmission frame (this is to detect successfully).In back off time
Interior WLAN user terminal can carry out normally detecting and data are transmitted, and keeping out of the way frame time when LTE system terminates, and user terminal carries out
When next frame cycle detection, if detecting present channel busy (WLAN user terminal accesses channel) or false alarm inspection
It surveys, then LTE user terminal cannot carry out data transmission, and until transmitting frame end, into another frame period, (this loses for detection
It loses).
The distribution method of data frame provided in an embodiment of the present invention increases on the basis of the frame of existing LTE system
One is kept out of the way frame, by reducing the Channel occupancy rate of LTE system, is promoted the Channel occupancy rate and handling capacity of wlan system, is made
Wlan system can be good at coexisting with LTE system, while also improve the channel utilization of unauthorized band channels.
Embodiment two
As shown in figure 3, being second of flow chart of distribution method of data frame provided in an embodiment of the present invention, this method is visual
For the expansion of above-mentioned method shown in FIG. 1, this method comprises:
S310, according to the channel occupancy information of collected unauthorized frequency range in the first scheduled duration before current time
And the channel occupancy information of historical storage calculate the perception frame of the current frame period, transmission frame and keep out of the way frame time slot it is long
Degree.
Specifically, between the time that the first scheduled duration is the channel occupancy information of the preset unauthorized frequency range of acquisition
Every can freely set.For example, the slot length or the slot length etc. in 20 frame periods in ten frame periods.
In the present embodiment, channel occupancy information include LTE system attempt access number, LTE system be successfully accessed number,
Wlan system fights for a number and wlan system fights for handling capacity etc. a little.
Wherein, it is the number that LTE user terminal detects channel that LTE system, which attempts access number, comprising LTE user terminal
Detect that present channel is the total degree of idle and busy state；LTE system is successfully accessed number as the inspection of LTE user terminal
Measuring present channel is idle state, and accesses the number of data transmission success after channel；It is that wlan system, which fights for a number,
The number of WLAN user terminal in one scheduled duration in LTE system base station range, i.e., fight for channel with LIT user terminal
WLAN user terminal number；It is that LTE system base station covers model in the first scheduled duration that wlan system, which fights for handling capacity a little,
Enclose the size of the handling capacity of interior WLAN user terminal.
Significantly, since might have WLAN user terminal in the first scheduled duration and enter and leave LTE system base station
Coverage area, while can also cause the variation of handling capacity, therefore, the wlan system in the present embodiment fights for a number and WLAN system
The handling capacity fought for a little of uniting is actually two average values, with characterize wlan system in the first scheduled duration fight for a number with
LAN system fights for the mean change situation of a throughput information.
Further, wlan system fights for a number and wlan system fights for the WLAN that handling capacity a little arrives for real-time reception
The information that system base-station is sent.The data information in wlan system can not be directly acquired due to the controller in LTE system base station,
Therefore, the controller in LTE system base station needs to be sent to the instruction that the controller in wlan system base station acquires these data,
Controller in wlan system base station is sent to the controller wlan system in LTE system base station by wlan system base station in real time
It fights for a number and wlan system fights for handling capacity a little, to meet the demand of the controller in LTE system base station.
Specifically, the channel occupancy information of historical storage is that the channel in the controller being stored in LTE system base station accounts for
With information, (LTE system trial access number, LTE system is successfully accessed number, wlan system fights for a number and wlan system is striven
The handling capacity made up time), which can be fixed storage, such as store certain bimestrial channel occupancy information；The storage side
Formula may be real-time storage, for example, the LTE system that acquires in real time of the controller in LTE system base station attempt access number and
LTE system is successfully accessed number, the WLAN of the controller real-time reception in LTE system base station sent from wlan system base station
System fights for a number and wlan system fights for handling capacity a little.
In the present embodiment, the step be the perception frame of current frame period in above-mentioned S110, transmission frame and keep out of the way frame when
The calculating step of gap length.
Specifically, at the time of defining current time as calculating current frame period, according to the deduction of time it is found that described
Current time must be some moment in a upper frame period.It, can be according to the collected current time in the present embodiment
The channel occupancy information in the first scheduled duration before is compared with the channel occupancy information of historical storage, utilizes big data
Statistical method (such as neural network algorithm, linear regression algorithm or clustering algorithm), judge the state of present channel, calculate
Perception frame, transmission frame and the slot length for keeping out of the way frame in new frame period, and using the new frame period as current period.
S320, according to the perception frame of the current frame period calculated in the previous frame period, transmission frame and keep out of the way frame time slot it is long
The perception frame and transmission frame of the current frame period are distributed to the end of the LTE user in the LTE system base station range by degree
End；Wherein, whether the perception frame is in idle condition for LTE user terminal detection current time channel；The transmission frame
Carry out data transmission for LTE user terminal.
In the present embodiment, step S320 is identical as above-mentioned S110.
The current frame period is kept out of the way frame point after detecting that LTE user terminal successfully completes data transmission by S330
LTE user terminal described in dispensing makes it keep out of the way frame according to and keeps out of the way the channel out.
In the present embodiment, step S330 is identical as above-mentioned S120.
S340 distributes to the LTE user terminal after detecting that LTE user terminal is not successfully completed data transmission
The perception frame and transmission frame in next frame period.
As shown in Fig. 2, if the controller in LTE system base station detects that LTE user terminal is not successfully completed data
Transmission, then be not assigned to the LTE user terminal current frame period keeps out of the way frame, but is distributed directly to one under LTE user terminal
The perception frame and transmission frame in a frame period, so that LTE user terminal can be directly entered after the transmission frame of current frame period
Next frame period can save the corresponding channel of slot length for keeping out of the way frame in this way.
The distribution method of data frame provided in an embodiment of the present invention, before the calculating moment of collected current frame period
The first scheduled duration in channel occupancy information and the channel occupancy information of historical storage be compared, calculate present frame week
The perception frame of phase, transmission frame and keep out of the way frame, while solving wlan system and LTE system coexistence problems, and adapts to reality
The channel status of Shi Bianhua further improves the utilization rate of channel.
Embodiment three
It as described in Figure 4, is the slot length meter for keeping out of the way frame in the distribution method of data frame provided in an embodiment of the present invention
The flow chart of calculation method, this method can be considered a kind of specific implementation for keeping out of the way frame calculation method in above-mentioned S310, the party
Method includes:
S410 connects according to the LTE system trial of unauthorized frequency range in the first scheduled duration before collected current time
Indegree and LTE system are successfully accessed number, calculate successfully access probability.
Specifically, enable unauthorized frequency range in the first scheduled duration before current time LTE system attempt access number be
Nattempt, it is N that LTE system, which is successfully accessed number,suc, then it is successfully accessed probabilityCalculation formula be
For example, if LTE system attempts access times Nattempt=10, LTE system is successfully accessed times Nsuc=8,
Then it is successfully accessed probability
S420, according in the channel occupancy information for being successfully accessed historical storage described in probability search with the success
The matched wlan system of access probability fights for a number.
In the present embodiment, the wlan system huge, different due to the data volume in the channel occupancy information of historical storage
It fights for a number all and can correspond to some being successfully accessed probability, this is successfully accessed probability and can fluctuate in certain data area, should
Being successfully accessed probability can be considered the average value of the data area.For example, it is assumed that wlan system fight for a number n be 9 when, successfully connect
Enter probabilityBetween 79%~81%, it can be considered asSimilarly, it is assumed that be successfully accessed probabilitySearch historical storage channel occupancy information inMatched wlan system is fought for a little
Number n is 9.The matching process can be the linear regression algorithm etc. in clustering algorithm, neural network algorithm or statistics.
In the present embodiment, if LTE system attempts access times Nattempt=5, LTE system is successfully accessed times Nsuc
=4, then it is successfully accessed probabilityIt is also 9 that then wlan system, which fights for a number n,.
S430 fights for number according to the wlan system and searches to fight for number same number a little with the wlan system
Under wlan system fight for handling capacity a little, and fought under the number same number that number a little adds one with the wlan system
Wlan system fight for handling capacity a little.
Specifically, a number is fought for due to the wlan system in LTE system base station range to change over time,
Wlan system, which fights for handling capacity a little, also can ceaselessly change, some wlan system fixed fights for a number, can all correspond to
One wlan system fights for the size of handling capacity a little, and the wlan system fight for handling capacity a little can wave in a certain range
It is dynamic.
In the present embodiment, search that with wlan system to fight for a number n matched in the channel occupancy information of historical storage
Wlan system fights for handling capacity S a littlenAnd wlan system is fought under the number n+1 same number that number a little adds one
Wlan system fights for handling capacity S a littlen+1.Under normal conditions, as wlan system fights for the increase of a number, wlan system is striven
The handling capacity made up time can reduce, i.e. Sn+1< Sn。
S440, according to formulaCalculate the slot length for keeping out of the way frame
Tback。
Specifically, it is assumed that being once successfully accessed the probability of transmission isThen access attempts probability once unsuccessfully isAnd the access attempts time duration of failure is T-Tback, it is successfully accessed in trial once, it is assumed that perception frame
Slot length much smaller than transmission frame slot length and keep out of the way the slot length of frame, then the slot length T of transmission frametrans≈T-
Tback.The channel seizure ratio of unauthorized frequency range LTE system can be calculated are as follows:
In the present embodiment, in order to guarantee that the channel seizure ratio of wlan system cannot be too low, then the channel occupancy of LTE system
Rate needs a upper limit, and is chosen according to formula as follows:
The left side in above-mentioned formulaExpression LTE user terminal is original after entering in LTE system base station range
N WLAN fight for node average throughput reduction size；On the right of formulaIndicate that increasing by 1 WLAN fights for saving
After point, original n WLAN, which fights for node throughput, reduces size.The meaning that the formula indicates is to strive in original n WLAN
It robs in node and increases a LTE user terminal than one WLAN of increase fights for the decline degree of average throughput caused by node
It is low.
It is obtained according to above-mentioned two equations
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed with described
Probability PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for
Point number adds one number, SnIt is fought for a little to fight for the wlan system under number n same number a little with the wlan system
Handling capacity, Sn+1To be successfully accessed probability P with describedsucMatched wlan system fights for the identical number of number n+1 that a number adds one
Now wlan system fights for handling capacity a little.
The slot length calculation method for keeping out of the way frame in the distribution method of data frame provided in an embodiment of the present invention, according to
It is successfully accessed probability in one scheduled duration, wlan system is searched in the channel occupancy information of historical storage and fights for a number letter
Breath, and search in turn and fight for the wlan system under number same number a little with the wlan system and fight for handling capacity a little, with
And number a little is fought for the wlan system, the wlan system under one number same number is added to fight for handling capacity a little, and root
Keep out of the way the slot length of frame according to these information calculating current frame period, to improve the channel seizure ratio of wlan system, mentions
The high utilization rate of channel.
Example IV
As shown in figure 5, for the slot length meter of the perception frame in the distribution method of data frame provided in an embodiment of the present invention
The flow chart of calculation method, this method can be considered a kind of specific implementation of the perception frame calculation method in above-mentioned S310, the party
Method includes:
S510 is in idle condition the channel of unauthorized frequency range and establishes dualism hypothesis mould with the case where busy state
Type.
Specifically, it is assumed that s (n), u (n) respectively indicate wlan system signal and additive white Gaussian noise.When a WLAN system
When system signal is carried out data transmission using channel, detected by LTE user terminal, and with sample frequency fsIt is sampled, because
This is in the slot length T for perceiving framesenseInterior, the number of samples of sampling is Tsensefs。
For the LTE user terminal in perception frame, receives signal y (n) and obey binary hypothesis test model (this
For the prior art), as follows:
Wherein, H0It is in idle condition for wlan system, H1Busy state is in for wlan system, it is assumed that u (n) is one
A independent identically distributed Gaussian random variable, mean value 0, variance areObey distributionEqually
Assuming thatAnd it is independent with u (n).
S520 calculates the detection probability and false alarm probability of LTE user terminal according to the dualism hypothesis model.
Specifically, the meaning of detection probability is to judge whether LTE user terminal is detected.At channel wlan system
In idle state or busy state (wlan system and LTE system, therefore wlan system herein are only considered in the present embodiment
Be in idle condition or busy state be channel be in idle condition or busy state), LTE user terminal
To carry out Channel Detection, therefore when wlan system is in idle condition, LTE user terminal has certain probability to carry out channel inspection
It surveys.
In the present embodiment, according to the formula of above-mentioned binary hypothesis test model, wlan system can be calculated and be in non-empty
Under not busy state, when threshold value is greater than ε, the detection probability of LTE user terminal (this is the prior art)
Wherein, Q (x) is Q function, and ε is threshold value, and γ is signal-to-noise ratio.
Meanwhile obtaining wlan system and being in idle condition down, when threshold value is greater than ε, the false alarm probability of LTE user terminal
(this is the prior art)
S530 is in idle condition the flat of lower LTE system according to channel described in the detection probability and false alarm probability calculation
Equal handling capacity and the channel are in the average throughput of LTE system under busy state.
Specifically, it is assumed that C0The handling capacity of lower LTE system is in idle condition for channel, probability of happening is (1-Pf)P
(H0)。C1The handling capacity of LTE system under busy state is in for channel, probability of happening is (1-Pd)P(H1)；Wherein, P (H0)
With P (H1) (this is the prior art) can be obtained by following formula
Wherein,For the transmission probability of each website in one time slot, p is collision probability, and W is the minimum of wlan system
Window is fought for, n is that wlan system fights for a number, and m is that maximum keeps out of the way rank.
The average throughput R that channel is in idle condition lower LTE system is finally calculated0=C0(1-PfPH0, WLAN system
Average throughput R1=C11-PdPH1 of the system in LTE system under busy state.
S540, according to formulaAnd pass through
Ergodic algorithm calculates the slot length T of the perception framesense。
In the present embodiment, the average throughput R of LTE system when being in busy state by above-mentioned channel1=C1(1-Pd)P
(H1) it is found that working as detection probability PdWhen too small, the average throughput R of LTE system1It can become larger, in order to avoid handling up for LTE system
Measure excessive, inspection probability PdIt needs to be greater than some detection probability threshold valueI.e.
Meanwhile in order to guarantee that LTE user terminal reaches lesser false alarm probability when detecting channel, need to increase as far as possible
The slot length T of frame is known in loadingsense, therefore, for the calculation formula of the average perceived handling capacity of objective function LTE systemIn TsenseValue to reach maximum as far as possible.
As shown from the above formula, objective function is relative to TsenseFor convex function, at least there is one on objective function curve
Maximum, in TsenseMaximum value can be calculated in range by ergodic algorithm, and as optimal Tsense；
Wherein, TbackIt (can be solved according to above-described embodiment for the slot length for keeping out of the way frame of the current frame period
To), T is the slot length in the frame period, R0The average throughput of lower LTE system, R are in idle condition for the channel1For
The channel is in the average throughput of LTE system under busy state, PdFor detection probability,For detection probability threshold value.
The slot length calculation method of perception frame in the distribution method of data frame provided in an embodiment of the present invention, to being in
Under idle state or the channel status under busy state establishes dualism hypothesis model, and it is general to calculate detection probability, false alarm
Rate, channel are in idle condition the average throughput of lower LTE system and channel is in being averaged for LTE system under busy state
Handling capacity, and determine the objective function of the average perceived handling capacity of LTE system, according to the lower limit of predefined detection probability, benefit
With the slot length of the optimal perception frame in traversal calculating target function.This method is in the detection that ensure that LTE user terminal
Under the premise of probability, the slot length of optimal perception frame is found, false alarm probability is reduced.
Further, in first scheduled duration according to before current time collected unauthorized frequency range channel
The channel occupancy information of occupied information and historical storage calculates the slot length of the transmission frame of the current frame period, comprising:
According to formula Ttrans=T-Tback-TsenseCalculate the slot length T of the transmission frametrans；
Wherein, TsensrFor the slot length of the perception frame of the current frame period, TbackFor moving back for the current frame period
The slot length of frame is kept away, T is the slot length in the frame period.
In the present embodiment, since the slot length in frame period is fixed value, and the frame period is divided into perception frame, transmission frame
With keep out of the way frame, then according to the slot length of the perception frame found out in above-described embodiment and the slot length for keeping out of the way frame, that is, can determine
The slot length of transmission frame.
Embodiment five
It as described in Figure 6, is the flow chart of data transmission method provided in an embodiment of the present invention, this method is used applied to LTE
Family terminal comprising:
S610 obtains the perception frame and transmission frame of the controller distribution in LTE system base station；The perception frame and transmission
Frame is the controller in perception frame, the transmission frame and when keeping out of the way the slot length of frame for calculating current frame period, distributes to LTE
User terminal.
Specifically, control after LTE user terminal enters in the coverage area of LTE system base station, in LTE system base station
Device can be according to perception frame, transmission frame and the slot length (calculation method of each frame for keeping out of the way frame in the frame period calculated
Same above-described embodiment, details are not described herein again) distribute to LTE user terminal perception frame and transmission frame.
Whether S620 is in idle condition according to perception frame detection channel.
Specifically, whether LTE user terminal is in idle condition according to the slot length detection channel of perception frame.This implementation
In example, the detection time of LTE user terminal is longer, and false alarm probability is lower.
S630, when detecting that channel is in idle condition according to the perception frame of the controller distribution in LTE system base station,
The channel is accessed, and is carried out data transmission according to the transmission frame that the controller distributes.
Specifically, if detecting that present channel is in idle condition, LTE user terminal accesses the channel, and according to
Transmission frame carries out data transmission；If detecting that present channel is in busy state, user terminal not will do it data biography
It is defeated, until transmitting frame end.
S640 is received after successfully completing data transmission and is kept out of the way frame from controller distribution, and according to described
Keep out of the way frame and keeps out of the way the channel out.
It specifically, can be LTE after LTE system base station controller detects that LTE user terminal successfully completes data transmission
User terminal distribution current frame period keeps out of the way frame, and LTE user terminal keeps out of the way channel out according to frame is kept out of the way, until keeping out of the way frame end
Enter next frame period afterwards, and WLAN user terminal can normally be examined in the slot length for keeping out of the way frame of LTE system
It surveys and data is transmitted, therefore, the frame of keeping out of the way of LTE system provides the chance for occupying channel for WLAN user terminal.
Further, if LTE system base station controller detects that LTE user terminal is not successfully completed data transmission,
After the transmission frame of current frame period, that does not distribute LTE user terminal current frame period keeps out of the way frame, but is distributed directly to
The perception frame and transmission frame in LTE user terminal next frame period.
Data transmission method provided in an embodiment of the present invention, LTE user terminal can actively be kept out of the way after the data transfer is complete
Channel out keeps out of the way that the slot length of frame carries out detection for WLAN user terminal and data are transmitted to vacate, increases wlan system
Channel seizure ratio, solve the coexistence problems of wlan system and LTE system, at the same also improve unauthorized frequency range channel benefit
With rate.
Embodiment six
As shown in fig. 7, the first structural schematic diagram of the distributor for data frame provided in an embodiment of the present invention, the dress
The controller being applied in LTE system base station is set, for executing above-mentioned method shown in FIG. 1 comprising the first perception frame and biography
Defeated frame distribution module 7100 and keep out of the way frame distribution module 7200.
First perception frame and transmission frame distribution module 7100, for according to the current frame period calculated in the previous frame period
Frame, transmission frame and the slot length for keeping out of the way frame are perceived, the perception frame and transmission frame of the current frame period are distributed into the LTE
LTE user terminal in system base-station coverage area；Wherein, the perception frame is for LTE user terminal detection current time letter
Whether road is in idle condition；The transmission frame carries out data transmission for LTE user terminal.
Keep out of the way frame distribution module 7200, for working as after detecting that LTE user terminal successfully completes data transmission by described in
The frame of keeping out of the way in previous frame period distributes to the LTE user terminal, so that it is kept out of the way frame according to and keeps out of the way the channel out.
The distributor of data frame provided in an embodiment of the present invention increases on the basis of the frame of existing LTE system
One is kept out of the way frame, by reducing the Channel occupancy rate of LTE system, is promoted the Channel occupancy rate and handling capacity of wlan system, is made
Wlan system can be good at coexisting with LTE system, while also improve the channel utilization of unauthorized band channels.
Embodiment seven
As shown in figure 8, second of structural schematic diagram of the distributor for data frame provided in an embodiment of the present invention, the dress
It sets for executing above-mentioned method shown in Fig. 3 comprising the first perception frame and transmission frame distribution module 7100 keeps out of the way frame distribution mould
Block 7200, slot length computing module 7300 and the second perception frame and transmission frame distribution module 7400.
Slot length computing module 7300, for non-being awarded according to collected in the first scheduled duration before current time
The channel occupancy information of the channel occupancy information and historical storage of weighing frequency range calculates the perception frame of the current frame period, transmission
Frame and the slot length for keeping out of the way frame.
Specifically, the channel occupancy information include: LTE system attempt access number, LTE system be successfully accessed number,
Wlan system fights for a number and wlan system fights for handling capacity a little.Wherein, the wlan system fights for a number and described
It is the information that the wlan system base station that real-time reception arrives is sent that wlan system, which fights for handling capacity a little,.
First perception frame and transmission frame distribution module 7100, for according to the current frame period calculated in the previous frame period
Frame, transmission frame and the slot length for keeping out of the way frame are perceived, the perception frame and transmission frame of the current frame period are distributed into the LTE
LTE user terminal in system base-station coverage area；Wherein, the perception frame is for LTE user terminal detection current time letter
Whether road is in idle condition；The transmission frame carries out data transmission for LTE user terminal.
Keep out of the way frame distribution module 7200, for working as after detecting that LTE user terminal successfully completes data transmission by described in
The frame of keeping out of the way in previous frame period distributes to the LTE user terminal, so that it is kept out of the way frame according to and keeps out of the way the channel out.
Second perception frame and transmission frame distribution module 7400 detect that LTE user terminal is not successfully completed number for working as
After transmission, the perception frame and transmission frame in the LTE user terminal next frame period are distributed to.
Specifically, the slot length computing module 7300 includes: perception frame slot length computation unit 7310, transmission frame
Slot length computing unit 7320 and keep out of the way frame slot length computation unit 7330.
The perception frame slot length computation unit 7310, for according to being adopted in the first scheduled duration before current time
The channel occupancy information of unauthorized frequency range and the channel occupancy information of historical storage collected calculates the current frame period
Perceive the slot length of frame.
The transmission frame slot length computing unit 7320, for according to being adopted in the first scheduled duration before current time
The channel occupancy information of unauthorized frequency range and the channel occupancy information of historical storage collected calculates the current frame period
The slot length of transmission frame.
It is described to keep out of the way frame slot length computation unit 7330, for according to being adopted in the first scheduled duration before current time
The channel occupancy information of unauthorized frequency range and the channel occupancy information of historical storage collected calculates the current frame period
Keep out of the way the slot length of frame.
The distributor of data frame provided in an embodiment of the present invention, before the calculating moment of collected current frame period
The first scheduled duration in channel occupancy information and the channel occupancy information of historical storage be compared, calculate present frame week
The perception frame of phase, transmission frame and keep out of the way frame, while solving wlan system and LTE system coexistence problems, and adapts to reality
The channel status of Shi Bianhua further improves the utilization rate of channel.
Embodiment eight
As shown in figure 9, to keep out of the way frame slot length computation in the distributor of data frame provided in an embodiment of the present invention
The structural schematic diagram of unit, the unit is for executing above-mentioned method shown in Fig. 4.
The frame slot length computation unit 7330 of keeping out of the way includes: to be successfully accessed probability to generate subelement 7331, WLAN system
System fights for a number generation subelement 7332, wlan system fights for a handling capacity and generates subelement 7333 and keep out of the way frame slot length
Generate subelement 7334.
It is successfully accessed probability and generates subelement 7331, for according in the first scheduled duration before collected current time
The LTE system of unauthorized frequency range attempts access number and LTE system is successfully accessed number, calculates successfully access probability.
Wlan system fights for a number and generates subelement 7332, for being successfully accessed history described in probability search according to
A number is fought for the wlan system for being successfully accessed probability match in the channel occupancy information of storage.
Wlan system fights for a handling capacity and generates subelement 7333, searches for fighting for a number according to the wlan system
Fight for the wlan system under number same number a little with the wlan system and fight for handling capacity a little, and with the WLAN system
System fights for number a little and the wlan system under one number same number is added to fight for handling capacity a little.
Keep out of the way frame slot length and generate subelement 7334, for according to formulaKeep out of the way the slot length T of frame described in calculatingback。
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed with described
Probability PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for
Point number adds one number, SnIt is fought for a little to fight for the wlan system under number n same number a little with the wlan system
Handling capacity, Sn+1To be successfully accessed probability P with describedsucMatched wlan system fights for the identical number of number n+1 that a number adds one
Now wlan system fights for handling capacity a little.
Keep out of the way frame slot length computation unit in the distributor of data frame provided in an embodiment of the present invention, according to first
It is successfully accessed probability in scheduled duration, wlan system is searched in the channel occupancy information of historical storage and fights for a number letter
Breath, and search in turn and fight for the wlan system under number same number a little with the wlan system and fight for handling capacity a little, with
And number a little is fought for the wlan system, the wlan system under one number same number is added to fight for handling capacity a little, and root
Keep out of the way the slot length of frame according to these information calculating current frame period, to improve the channel seizure ratio of wlan system, mentions
The high utilization rate of channel.
Embodiment nine
It as shown in Figure 10, is the perception frame slot length computation in the distributor of data frame provided in an embodiment of the present invention
The structural schematic diagram of unit, the unit is for executing above-mentioned method shown in fig. 5.
The perception frame slot length computation unit 7310 includes: that dualism hypothesis model generates subelement 7311, detection generally
Rate and false alarm probability generate subelement 7312, LTE system average throughput generates subelement 7313 and perception frame slot length is raw
At subelement 7314.
Dualism hypothesis model generate subelement 7311, for the channel to unauthorized frequency range be in idle condition with it is busy
The case where state, establishes dualism hypothesis model.
Detection probability and false alarm probability generate subelement 7312, for calculating LTE user according to the dualism hypothesis model
The detection probability and false alarm probability of terminal.
LTE system average throughput generates subelement 7313, for according to the detection probability and false alarm probability calculation institute
State that channel is in idle condition the average throughput of lower LTE system and the channel is in LTE system under busy state
Average throughput.
It perceives frame slot length and generates subelement 7314, for according to formulaAnd the perception frame is calculated by ergodic algorithm
Slot length Tsense。
Wherein, TbackFor the slot length for keeping out of the way frame of the current frame period, T is the slot length in the frame period, R0
The average throughput of lower LTE system, R are in idle condition for the channel1LTE system under busy state is in for the channel
The average throughput of system, PdFor detection probability,For detection probability threshold value.
Perception frame slot length computation unit in the distributor of data frame provided in an embodiment of the present invention, in sky
Under not busy state or the channel status under busy state establishes dualism hypothesis model, calculate detection probability, false alarm probability,
Channel is in idle condition the average throughput of lower LTE system and channel is in being averaged for LTE system under busy state and gulps down
The amount of spitting, and determine the objective function of the average perceived handling capacity of LTE system, according to the lower limit of predefined detection probability, utilize
The slot length of optimal perception frame in traversal calculating target function.This method is general in the detection that ensure that LTE user terminal
Under the premise of rate, the slot length of optimal perception frame is found, false alarm probability is reduced.
Embodiment ten
It as shown in figure 11, is the structural schematic diagram of data transmission device provided in an embodiment of the present invention, which is applied to
LTE user terminal, for executing above-mentioned method shown in fig. 6.Data transmission device includes: that perception frame and transmission frame obtain module
1110, channel detection module 1120, data transmission module 1130 and channel keep out of the way module 1140.
It perceives frame and transmission frame obtains module 1110, for obtaining the perception frame of the distribution of the controller in LTE system base station
And transmission frame；The perception frame and transmission frame be the controller calculate current frame period perception frame, transmission frame and
When keeping out of the way the slot length of frame, LTE user terminal is distributed to；
Channel detection module 1120, for whether being in idle condition according to perception frame detection channel
Data transmission module 1130, for detecting letter when the perception frame distributed according to the controller in LTE system base station
When road is in idle condition, the channel is accessed, and carry out data transmission according to the transmission frame that the controller distributes.
Channel keeps out of the way module 1140, for receiving from controller distribution after successfully completing data transmission
Keep out of the way frame, and the channel out is kept out of the way according to the frame of keeping out of the way.
Data transmission device provided in an embodiment of the present invention, LTE user terminal can actively be kept out of the way after the data transfer is complete
Channel out keeps out of the way that the slot length of frame carries out detection for WLAN user terminal and data are transmitted to vacate, increases wlan system
Channel seizure ratio, solve the coexistence problems of wlan system and LTE system, at the same also improve unauthorized frequency range channel benefit
With rate.
It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality
Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation
In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to
Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment
Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in process, method, article or equipment including the element.
Each embodiment in this specification is all made of relevant mode and describes, same and similar portion between each embodiment
Dividing may refer to each other, and each embodiment focuses on the differences from other embodiments.Especially for system reality
For applying example, since it is substantially similar to the method embodiment, so being described relatively simple, related place is referring to embodiment of the method
Part explanation.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all
Any modification, equivalent replacement, improvement and so within the spirit and principles in the present invention, are all contained in protection scope of the present invention
It is interior.
Claims (8)
1. a kind of distribution method of data frame, which is characterized in that applied to the controller in LTE system base station, the method packet
It includes:
It, will be described according to perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period calculated in the previous frame period
The perception frame and transmission frame of current frame period distribute to the LTE user terminal in the LTE system base station range；Wherein,
Whether the perception frame is in idle condition for LTE user terminal detection current time channel；The transmission frame is used for LTE
Family terminal carries out data transmission；
After detecting that LTE user terminal successfully completes data transmission, by the current frame period keep out of the way frame distribute to it is described
LTE user terminal makes it keep out of the way frame according to and keeps out of the way the channel out；
Perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period calculate as follows:
According to the channel occupancy information and history of collected unauthorized frequency range in the first scheduled duration before current time
The channel occupancy information of storage calculates perception frame, transmission frame and the slot length for keeping out of the way frame of the current frame period；The letter
Road occupied information include: LTE system attempt access number, LTE system is successfully accessed number, wlan system fights for a number and
Wlan system fights for handling capacity a little；
In first scheduled duration according to before current time the channel occupancy information of collected unauthorized frequency range and
The channel occupancy information of historical storage calculates the slot length for keeping out of the way frame of the current frame period, comprising:
According in the first scheduled duration before collected current time unauthorized frequency range LTE system attempt access number and
LTE system is successfully accessed number, calculates successfully access probability；
Probability is successfully accessed with described according in the channel occupancy information for being successfully accessed historical storage described in probability search
Matched wlan system fights for a number；
A number, which is fought for, according to the wlan system searches the WLAN fought under number same number a little with the wlan system
System fights for handling capacity a little, and fights for number a little with the wlan system and add WLAN system under one number same number
System fights for handling capacity a little；
According to formulaKeep out of the way the slot length of frame described in calculating；
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed probability with described
PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for a little a
Number adds one number, SnWlan system to be fought under number n same number a little with the wlan system fights for handling up a little
Amount, Sn+1To be successfully accessed probability P with describedsucMatched wlan system is fought under the number n+1 same number that a number adds one
Wlan system fight for handling capacity a little.
2. the method according to claim 1, wherein the wlan system fights for a number and the wlan system
Fighting for handling capacity a little is the information that the wlan system base station that real-time reception arrives is sent.
3. the method according to claim 1, wherein in first scheduled duration according to before current time
The channel occupancy information of collected unauthorized frequency range and the channel occupancy information of historical storage calculate the current frame period
Perception frame slot length, comprising:
The channel of unauthorized frequency range is in idle condition and establishes dualism hypothesis model with the case where busy state；
The detection probability and false alarm probability of LTE user terminal are calculated according to the dualism hypothesis model；
According to channel described in the detection probability and false alarm probability calculation be in idle condition the average throughput of lower LTE system with
And the channel is in the average throughput of LTE system under busy state；
According to formulaAnd pass through ergodic algorithm meter
Calculate the slot length T of the perception framesense；
Wherein, TbackFor the slot length for keeping out of the way frame of the current frame period, T is the slot length in the frame period, R0For institute
State the average throughput that channel is in idle condition lower LTE system, R1LTE system under busy state is in for the channel
Average throughput, PdFor detection probability,For detection probability threshold value.
4. according to the method described in claim 2, it is characterized in that, in first scheduled duration according to before current time
The channel occupancy information of collected unauthorized frequency range and the channel occupancy information of historical storage calculate the current frame period
Transmission frame slot length, comprising:
According to formula Ttrans=T-Tback-TsenseCalculate the slot length T of the transmission frametrans；
Wherein, TsenseFor the slot length of the perception frame of the current frame period, TbackKeep out of the way frame for the current frame period
Slot length, T be the frame period slot length.
5. method according to claim 1-4, which is characterized in that the method also includes:
After detecting that LTE user terminal is not successfully completed data transmission, the LTE user terminal next frame week is distributed to
The perception frame and transmission frame of phase.
6. a kind of data transmission method, which is characterized in that be applied to LTE user terminal, which comprises
Obtain the perception frame and transmission frame of the controller distribution in LTE system base station；The perception frame and transmission frame are described
Controller distributes to LTE user terminal in the perception frame, the transmission frame and when keeping out of the way the slot length of frame that calculate current frame period
's；
Whether it is in idle condition according to perception frame detection channel；
When detecting that channel is in idle condition according to the perception frame of the controller distribution in LTE system base station, described in access
Channel, and carried out data transmission according to the transmission frame that the controller distributes；
After successfully completing data transmission, receives and keep out of the way frame from controller distribution, and moved back according to the frame of keeping out of the way
Keep away out the channel；
Wherein, the controller is accounted for according to the channel of collected unauthorized frequency range in the first scheduled duration before current time
With the channel occupancy information of information and historical storage calculate the perception frame of the current frame period, transmission frame and keep out of the way frame when
Gap length；The channel occupancy information includes: that LTE system attempts access number, LTE system is successfully accessed number, wlan system
It fights for a number and wlan system fights for handling capacity a little；
In first scheduled duration according to before current time the channel occupancy information of collected unauthorized frequency range and
The channel occupancy information of historical storage calculates the slot length for keeping out of the way frame of the current frame period, comprising:
According in the first scheduled duration before collected current time unauthorized frequency range LTE system attempt access number and
LTE system is successfully accessed number, calculates successfully access probability；
Probability is successfully accessed with described according in the channel occupancy information for being successfully accessed historical storage described in probability search
Matched wlan system fights for a number；
A number, which is fought for, according to the wlan system searches the WLAN fought under number same number a little with the wlan system
System fights for handling capacity a little, and fights for number a little with the wlan system and add WLAN system under one number same number
System fights for handling capacity a little；
According to formulaKeep out of the way the slot length of frame described in calculating；
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed probability with described
PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for a little a
Number adds one number, SnWlan system to be fought under number n same number a little with the wlan system fights for handling up a little
Amount, Sn+1To be successfully accessed probability P with describedsucMatched wlan system is fought under the number n+1 same number that a number adds one
Wlan system fight for handling capacity a little.
7. a kind of distributor of data frame, which is characterized in that applied to the controller in LTE system base station, described device packet
It includes:
First perception frame and transmission frame distribution module, for according to the perception frame of the current frame period calculated in the previous frame period,
Transmission frame and the slot length for keeping out of the way frame, distribute to the LTE system base for the perception frame and transmission frame of the current frame period
The LTE user terminal stood in coverage area；Wherein, whether the perception frame detects current time channel for LTE user terminal
It is in idle condition；The transmission frame carries out data transmission for LTE user terminal；
Keep out of the way frame distribution module, for when detect LTE user terminal successfully complete data transmission after, by the current frame period
Frame of keeping out of the way distribute to the LTE user terminal, so that it is kept out of the way frame according to and keep out of the way the channel out；
The first perception frame and transmission frame distribution module, are specifically used for: according in the first scheduled duration before current time
The channel occupancy information of collected unauthorized frequency range and the channel occupancy information of historical storage calculate the current frame period
Perception frame, transmission frame and the slot length for keeping out of the way frame；The channel occupancy information include: LTE system attempt access number,
LTE system is successfully accessed number, wlan system fights for a number and wlan system fights for handling capacity a little；
The first perception frame and transmission frame distribution module, are specifically used for: predetermined according to before collected current time first
The LTE system of unauthorized frequency range attempts access number in duration and LTE system is successfully accessed number, calculates successfully access probability；
Probability is successfully accessed with described according in the channel occupancy information for being successfully accessed historical storage described in probability search
Matched wlan system fights for a number；
A number, which is fought for, according to the wlan system searches the WLAN fought under number same number a little with the wlan system
System fights for handling capacity a little, and fights for number a little with the wlan system and add WLAN system under one number same number
System fights for handling capacity a little；
According to formulaKeep out of the way the slot length of frame described in calculating；
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed probability with described
PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for a little a
Number adds one number, SnWlan system to be fought under number n same number a little with the wlan system fights for handling up a little
Amount, Sn+1To be successfully accessed probability P with describedsucMatched wlan system is fought under the number n+1 same number that a number adds one
Wlan system fight for handling capacity a little.
8. a kind of data transmission device, which is characterized in that be applied to LTE user terminal, described device includes:
It perceives frame and transmission frame obtains module, for obtaining the perception frame and transmission frame of the distribution of the controller in LTE system base station；
The perception frame and transmission frame be the controller calculate current frame period perception frame, transmission frame and keep out of the way frame when
When gap length, LTE user terminal is distributed to；
Channel detection module, for whether being in idle condition according to perception frame detection channel；
Data transmission module, for detecting that channel is in sky when the perception frame distributed according to the controller in LTE system base station
When not busy state, the channel is accessed, and carry out data transmission according to the transmission frame that the controller distributes；
Channel keeps out of the way module, for after successfully completing data transmission, receiving the frame of keeping out of the way from controller distribution, and
Keep out of the way the channel out according to the frame of keeping out of the way；
Wherein, the controller is accounted for according to the channel of collected unauthorized frequency range in the first scheduled duration before current time
With the channel occupancy information of information and historical storage calculate the perception frame of the current frame period, transmission frame and keep out of the way frame when
Gap length；The channel occupancy information includes: that LTE system attempts access number, LTE system is successfully accessed number, wlan system
It fights for a number and wlan system fights for handling capacity a little；
The controller connects according to the LTE system trial of unauthorized frequency range in the first scheduled duration before collected current time
Indegree and LTE system are successfully accessed number, calculate successfully access probability；History described in probability search is successfully accessed according to described
A number is fought for the wlan system for being successfully accessed probability match in the channel occupancy information of storage；According to the WLAN
System fights for number and searches fighting for the wlan system under number same number a little with the wlan system and fighting for handling up a little
Amount, and fight for number a little with the wlan system and the wlan system under one number same number is added to fight for handling up a little
Amount；According to formulaKeep out of the way the slot length of frame described in calculating；
Wherein, T is the slot length in the frame period, PsucIt is successfully accessed probability to be described, n is to be successfully accessed probability with described
PsucMatched wlan system fights for a number, and n+1 is to be successfully accessed probability P with describedsucMatched wlan system is fought for a little a
Number adds one number, SnWlan system to be fought under number n same number a little with the wlan system fights for handling up a little
Amount, Sn+1To be successfully accessed probability P with describedsucMatched wlan system is fought under the number n+1 same number that a number adds one
Wlan system fight for handling capacity a little.
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| CN106535355B (en) * | 2016-11-04 | 2019-12-06 | 北京邮电大学 | channel access method and system |
| CN107231224B (en) * | 2017-04-19 | 2021-01-19 | 南京邮电大学 | LTE WLAN network dynamic aggregation decision-making method under maximum transmission time limit |
| CN113194539A (en) * | 2021-04-07 | 2021-07-30 | 深圳市乙辰科技股份有限公司 | Frequency band interference suppression method and system |
| CN116828621A (en) * | 2022-03-18 | 2023-09-29 | 维沃移动通信有限公司 | Perception processing method, device, communication equipment and readable storage medium |
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