CN109168169A - A kind of covering grade upgrade method and device - Google Patents
A kind of covering grade upgrade method and device Download PDFInfo
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- CN109168169A CN109168169A CN201811015257.9A CN201811015257A CN109168169A CN 109168169 A CN109168169 A CN 109168169A CN 201811015257 A CN201811015257 A CN 201811015257A CN 109168169 A CN109168169 A CN 109168169A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/24—Cell structures
- H04W16/26—Cell enhancers or enhancement, e.g. for tunnels, building shadow
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B17/00—Monitoring; Testing
- H04B17/30—Monitoring; Testing of propagation channels
- H04B17/309—Measuring or estimating channel quality parameters
- H04B17/318—Received signal strength
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Abstract
The problem of the embodiment of the present application discloses a kind of covering grade upgrade method and device, is related to field of communication technology, and it is larger to solve business propagation delay time caused by existing covering grade upgrade method, influences the access of follow-up business.The specific scheme is that obtaining the covering grade i of terminal；According to the covering grade i of terminal, Reference Signal Received Power RSRP, the channel capacity upper limit value of cell and the terminal signal-to-noise ratio, it is determined whether to terminal carry out covering grade upgrading.
Description
Technical field
The invention relates to field of communication technology more particularly to a kind of covering grade upgrade method and devices.
Background technique
It is to be based on based on cellular narrowband Internet of Things (Narrow Band Internet of Things, NB-IoT)
The technology of Internet of things of 3GPP LTE standard agreement evolution is mainly directed towards middle low rate, depth covering, low-power consumption, the object connected greatly
Working application scene.3GPP provides NB-IoT than general packet radio service technology (General Packet Radio
Service, GPRS) there is the promotion of 20dB in terms of covering, support three kinds of covering grades, including covering grade 0, covering grade 1
With covering grade 2, downlink brings coverage enhancement by Data duplication, and uplink passes through Data duplication, promotion upstream power spectrum density
Mode bring coverage enhancement.
A kind of existing access technology configures terminal random access number of attempt under each covering grade by base station, when
After user attempts access failure several times, next covering grade can be risen to, goes to attempt with the parameter of higher covering grade.Such one
Come, at the better position of signal quality, when having great amount of terminals while accessing, if channel capacity deficiency causes part terminal to connect
Enter failure, terminal can still rise to next covering grade and attempt access, cause business propagation delay time larger, influence follow-up business
Access.
Summary of the invention
The embodiment of the present application provides a kind of covering grade upgrade method and device, can be avoided since user is in signal matter
It measures in preferable situation, the unsuccessful progress covering grade jump of access, user's access rate is low under the new covering grade of bring asks
Topic.
In order to achieve the above objectives, the embodiment of the present application adopts the following technical scheme that
The embodiment of the present application in a first aspect, provide a kind of covering grade upgrade method, this method comprises: obtaining terminal
Covering grade i, i=0,1,2, which is the terminal in above-mentioned cell coverage area, which accesses above-mentioned small not successfully
Area；According to the covering grade i of the terminal, Reference Signal Received Power RSRP, the channel capacity upper limit value of cell and the letter of terminal
It makes an uproar ratio, it is determined whether covering grade upgrading is carried out to the terminal.The channel capacity upper limit value of the cell specifically: Volumch=
Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of cell, SystemchFor system subcarrier number, β is letter
Road capacity ratio coefficient, 0≤β≤1.It based on this programme, can be avoided since user is in the preferable situation of signal quality, access
Unsuccessful progress covering grade jump, the low problem of user's access rate under the new covering grade of bring.
With reference to first aspect, in the first possible implementation, above-mentioned to determine whether to carry out covering grade to terminal
Upgrading, comprising: determine the RSRP of the terminal whether less than the first preset threshold；First preset threshold is the covering grade i
With the boundary RSRP of covering grade i+1；If the RSRP of above-mentioned terminal the terminal such as covers less than the first preset threshold
Grade upgrading.Based on this programme, covering grade upgrading can be carried out to the terminal when terminal is in signal difference point position, so that
The repetition access number of terminal increases, to be successfully accessed the cell.
With reference to first aspect with above-mentioned possible implementation, in alternatively possible implementation, above-mentioned determination is
It is no that covering grade upgrading is carried out to terminal, further includes: if the RSRP of terminal is greater than or equal to the first preset threshold, to determine unit
Whether the number of users for initiating access request in the time in cell is greater than or equal to the channel capacity upper limit value of the cell；If single
The number of users for initiating access request in the time of position in cell is greater than or equal to the channel capacity upper limit value of the cell, not to institute
It states terminal and carries out covering grade upgrading.Based on this programme, can be at the better position of signal quality in terminal, channel capacity
When congestion causes terminal to access not successfully, without carrying out the upgrading of covering grade, it can be accessed with continuation requests, when in cell
After number of users reduces, terminal can be successfully accessed the cell, reduce the time delay of business transmission compared with prior art.
With reference to first aspect with above-mentioned possible implementation, in alternatively possible implementation, above-mentioned determination is
It is no that covering grade upgrading is carried out to terminal, further includes: if initiating the number of users of access request in the unit time in cell less than small
Whether the channel capacity upper limit value in area determines the signal-to-noise ratio of terminal less than the second preset threshold；Second preset threshold is described
The intended recipient signal-to-noise ratio of terminal and the difference of target signal to noise ratio float value；If the signal-to-noise ratio of terminal less than the second preset threshold,
Covering grade upgrading is carried out to the terminal.Based on this programme, too poor terminal can be caused to access cell in the SNR of present terminal
When failure, the upgrading of covering grade is carried out to the terminal, so that the repetition access number of terminal increases, to be successfully accessed this
Cell.
It is above-mentioned to terminal in alternatively possible implementation with reference to first aspect with above-mentioned possible implementation
Progress covering grade, which upgrades to, rises to covering grade i+1 for the covering grade i of the terminal.Based on this programme, enable to cover
Terminal after grade upgrading repeats access number and increases, and terminal is allowed to be successfully accessed the cell.
The second aspect of the embodiment of the present application provides a kind of covering grade upgrading, which includes: acquiring unit, is used for
Obtain the covering grade i, i=0,1 of terminal, 2, which is the terminal in above-mentioned cell coverage area, which connects not successfully
Enter above-mentioned cell；Processing unit, for according to the covering grade i of the terminal, Reference Signal Received Power RSRP, cell letter
The signal-to-noise ratio of road maximum size value and terminal, it is determined whether covering grade upgrading is carried out to the terminal.The channel of the cell holds
Measure upper limit value specifically: Volumch=Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of the cell,
SystemchFor system subcarrier number, β is channel capacity proportionality coefficient, 0≤β≤1.
In conjunction with second aspect, in the first possible implementation, above-mentioned processing unit is specifically used for, determines terminal
RSRP whether less than the first preset threshold；First preset threshold is the boundary of the covering grade i and covering grade i+1
RSRP；If the RSRP of the terminal is less than first preset threshold, above-mentioned processing unit is also used to the terminal such as cover
Grade upgrading.
In conjunction with second aspect and above-mentioned possible implementation, in alternatively possible implementation, if terminal
RSRP is greater than or equal to the first preset threshold, and above-mentioned processing unit is also used to determine in the unit time that access is initiated in cell asks
Whether the number of users asked is greater than or equal to the channel capacity upper limit value of cell；If access request is initiated in the unit time in cell
Number of users be greater than or equal to cell channel capacity upper limit value, above-mentioned processing unit not to the terminal carry out covering grade
Upgrading.
In conjunction with second aspect and above-mentioned possible implementation, in alternatively possible implementation, if the unit time
The number of users that access request is initiated in interior cell is less than the channel capacity upper limit value of cell, and above-mentioned processing unit is also used to determine
Whether the signal-to-noise ratio of terminal is less than the second preset threshold；Second preset threshold is the intended recipient signal-to-noise ratio and target of terminal
The difference of signal-to-noise ratio float value；If the signal-to-noise ratio of terminal less than the second preset threshold, above-mentioned processing unit be also used to terminal into
The upgrading of row covering grade.
It is above-mentioned to described in alternatively possible implementation in conjunction with second aspect and above-mentioned possible implementation
Terminal progress covering grade, which upgrades to, rises to covering grade i+1 for the covering grade i of terminal.
The effect description of the various implementations of above-mentioned second aspect and second aspect can be corresponding with reference to first aspect
The description of effect, details are not described herein.
The third aspect of the embodiment of the present application, provides a kind of server, include in the structure of the server processor and
Memory, the memory save the necessary program instruction of the server and data, which uses for coupling with processor
In executing the program instruction stored in memory, so that the server executes the above method.
The fourth aspect of the embodiment of the present application provides a kind of computer storage medium, deposits in the computer storage medium
Computer program code is contained, when the computer program code is run on a processor, so that the processor executes the
Any covering grade upgrade method in the possible implementation of one side or first aspect.
5th aspect of the embodiment of the present application, provides a kind of computer program product, which stores above-mentioned
The computer software instructions that processor executes, the computer software instructions include the journey for executing the above-mentioned aspect scheme
Sequence.
6th aspect of the embodiment of the present application, provides a kind of device, which exists with the product form of chip, should
It include processor and memory in the structure of device, which saves the necessary program of the device for coupling with processor
Instruction and data, the processor cover in the above method for executing the program instruction stored in memory so that the device executes
The function of lid grade update device.
Detailed description of the invention
Fig. 1 is a kind of covering grade schematic diagram provided by the embodiments of the present application；
Fig. 2 is a kind of network architecture schematic diagram of NB-IoT provided by the embodiments of the present application；
Fig. 3 is a kind of flow chart of covering grade upgrade method provided by the embodiments of the present application；
Fig. 4 is a kind of composition schematic diagram of covering grade update device provided by the embodiments of the present application；
Fig. 5 is the composition schematic diagram of another covering grade update device provided by the embodiments of the present application.
Specific embodiment
Firstly, part noun involved in the embodiment of the present application is explained:
1, covering grade
Covering grade upgrade method is applied to NB-Iot network, three kinds of network support coverings etc. in the embodiment of the present application
Grade, can fight maximum coupling loss (Maximum Coupling Loss, MCL) is 144dB, 154dB, 164dB, downlink respectively
Coverage enhancement is brought by Data duplication, uplink brings covering to increase by way of Data duplication, promotion upstream power spectrum density
By force；Three kinds of covering grades are defined as follows:
● covering grade 0 (CEL0): MCL is less than 144dB；
● covering grade 1 (CEL1): MCL is less than 154dB；
● covering grade 2 (CEL2): MCL is less than 164dB；
Under different covering grades, base station can configure different lead code access numbers, and covering grade is higher, base
The repetition access number configured of standing is bigger.
2, demarcate RSRP
Illustratively, the boundary RSRP that the boundary RSRP in the embodiment of the present application is covering grade i and covering grade i+1,
As shown in Figure 1, RSRP1 is covering grade 1 and covering grade 2 for the boundary RSRP, RSRP2 of covering grade 0 and covering grade 1
Boundary RSRP.The value of boundary RSRP is that base station is pre-configured.For example, the boundary of covering grade 0 and covering grade 1
RSRP1 can be -110dB, and the boundary RSRP2 of covering grade 1 and covering grade 2 can be -120dB.The embodiment of the present application pair
It is not defined in the occurrence of the boundary RSRP of different covering grades, is merely illustrative herein.
In the embodiment of the present application, " illustrative " or " such as " etc. words for indicate make example, illustration or explanation.
Be described as in the embodiment of the present application " illustrative " or " such as " any embodiment or design scheme be not necessarily to be construed as
Advantage more preferably or more than other embodiments or design scheme.Specifically, use " illustrative " or " such as " etc. words
It is intended to that related notion is presented in specific ways.
The embodiment of the present application provides a kind of covering grade upgrade method, and illustratively, this method can be applied to Fig. 2 institute
The NB-Iot network architecture shown, the network architecture include terminal 201, base station 202, core net 203, platform of internet of things 204 and answer
With server 205.
Terminal 201, can be NB-IoT terminal, which can be connected to base station by eating dishes without rice or wine.
Base station 202, for undertake eat dishes without rice or wine access processing, the correlation functions such as cell management, and by S1-lite interface with
IoT core net is attached, and gives Non-Access Stratum data forwarding to high-rise network element processing.
Core net 203 is forwarded to for undertaking the function of interacting with terminal Non-Access Stratum, and by IoT service related data
IoT platform is handled.
Platform of internet of things 204 for converging the IoT data obtained from various access nets, and is forwarded to according to different type
Corresponding service application device is handled.
Application server 205 is the final convergent point of IoT data, carries out the behaviour such as data processing according to the demand of client
Make.
The equipment that the embodiment of the present application includes for the NB-Iot network architecture is not defined, and Fig. 2 is merely exemplary
Explanation.
In order to solve in background technique, existing covering grade upgrade method has a large amount of at the better position of signal quality
When terminal accesses simultaneously, if channel capacity deficiency leads to part terminal access failure, terminal can still rise to next covering grade and taste
It tries into the problem of causing business propagation delay time larger, influence the access of follow-up business, the embodiment of the present application provides one kind
Covering grade upgrade method, this method can be avoided since user is in the preferable situation of signal quality, access unsuccessful covered
Lid grade is jumped, the low problem of user's access rate under the new covering grade of bring.It should be understood that the following embodiments of the application
In covering grade upgrade method be to be used when terminal accesses cell not successfully.
In conjunction with Fig. 1, Fig. 2, as shown in figure 3, minilocus approach provided by the embodiments of the present application may include S301-S307.
S301, the covering grade i, i=0,1 for obtaining terminal, 2.
Illustratively, the covering grade i of the terminal can be covering grade 0, covering grade 1 or covering grade 2.This Shen
Please embodiment covering grade locating for terminal is not defined, only with the covering grade of terminal be herein 1 to illustrate
Explanation.It should be understood that the terminal in the embodiment of the present application is to access the cell not successfully in a cell coverage area
Terminal.
S302, determine the Reference Signal Received Power RSRP of terminal whether less than the first preset threshold.
Wherein, which is the boundary RSRP of covering grade i and covering grade i+1.
Illustratively, boundary RSRP is the RSRP for distinguishing different covering grades, and locating for boundary RSRP and terminal
Covering grade is related, for example, first preset threshold is covering grade 0 and covering grade 1 if the covering grade of terminal is 0
Demarcate RSRP, is denoted as RSRP1；If the covering grade of terminal is 1, which is covering grade 1 and covering grade 2
Boundary RSRP, be denoted as RSRP2.
Illustratively, the RSRP of terminal can be denoted as RSRPUE, the RSRP of above-mentioned comparison terminal and the first preset threshold
If the covering grade that size may include: terminal is 1, the RSRP of comparison terminalUEWith the size of RSRP2, to determine that terminal is current
In the better position of signal or signal difference point position.If RSRPUELess than RSRP2, it is not good enough to determine that the terminal is currently at signal
Position.If RSRPUEGreater than RSRP2, determine that the terminal is currently at the better position of signal.
If the RSRP of S303, terminal carries out covering grade upgrading less than the first preset threshold, to terminal.
Illustratively, if the RSRP of terminalUEIt less than RSRP2, determines that the received signal quality of terminal is poor, is in signal
Not good enough position, then the reason of terminal accesses cell not successfully is that the currently received signal quality of terminal is poor, therefore can be with
Covering grade upgrading directly is carried out to the terminal of the signal difference point position.For example, the terminal liter that can be 1 by the covering grade
To covering grade 2, so that the repetition access number of terminal increases, to be successfully accessed the cell.
If the RSRP of S304, terminal is greater than or equal to the first preset threshold, determines and initiate access in the unit time in cell
Whether the number of users of request is greater than or equal to the channel capacity upper limit value of cell.
Illustratively, if the RSRP of terminalUEIt more than or equal to RSRP2, determines that the received signal quality of terminal is preferable, locates
In the better position of signal, and cell should be accessed not successfully in the terminal of the better position of signal, then just needing further to sentence
Whether break since the number of users of current area access excessively causes channel capacity insufficient, the terminal is caused to access cell not successfully.
For example, can be true by comparing the number of users of initiation access request in the unit time and the size of cell channel maximum size value
It is fixed that whether channel capacity is insufficient.
Illustratively, the channel capacity upper limit value specifically:
Volumch=Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of cell, SystemchTo be
System sub-carrier number, β are channel capacity proportionality coefficient, 0≤β≤1.
Illustratively, the total bandwidth of NB-IoT network can be 180KHz, if what base station opened is between 15KHz subcarrier
Every then system subcarrier number can be Systemch=180/15=12；If what base station was opened is between 3.75KHz subcarrier
Every then system subcarrier number can be Systemch=180/3.75=48.The embodiment of the present application is for system subcarrier number
Occurrence be not defined, be merely illustrative herein.
Illustratively, the value of above-mentioned channel capacity proportionality coefficient β can be with 0 to 1 arbitrary number, the channel capacity ratio
Specific value the embodiment of the present application of factor beta is not defined, can empirically value.
Illustratively, the number of users for access request being initiated in unit time cell can be denoted as NumAccess_UE, the unit
Time can be 1S, if Num in 1SAccess_UE≥Volumch, the interior number of users for initiating access request of current one time cell
Greater than channel capacity upper limit value, determines that the number of users of current area access is excessive, cause access congestion；If Num in 1SAccess_UE
< Volumch, the interior number of users for initiating access request of current one time cell is less than channel capacity upper limit value, determining current small
The number of users of area's access is smaller, does not cause access congestion.
If S305, the number of users for initiating access request in the unit time in cell are greater than or equal to the channel capacity of cell
Upper limit value does not carry out covering grade upgrading to the terminal.
Illustratively, if Num in 1SAccess_UE≥Volumch, the interior use for initiating access request of current one time cell
Amount is greater than channel capacity upper limit value, determines that the number of users of current area access is excessive, causes access congestion.It should be understood that
In this case the terminal access not successfully the reason of cell be current area access number of users it is excessive, therefore terminal is not
It is successfully accessed the cell, at this point, terminal can be accessed without carrying out covering grade upgrading to the terminal with continuation requests, works as cell
After interior number of users reduces, terminal can be successfully accessed the cell.
It should be noted that in the prior art, at the better position of signal quality, when having great amount of terminals while accessing, if
Channel capacity deficiency leads to part terminal access failure, and terminal can still rise to next covering grade and attempt access, this will lead to industry
Business access number of repetition is big, and data retransmission times will be got higher after covering grade upgrading, when not only increasing this business
Prolong the access for having an effect on follow-up business.And the cut-in method of the embodiment of the present application is at the better position of signal quality, channel capacity
When congestion causes terminal to access not successfully, without carrying out the upgrading of covering grade, it can be accessed with continuation requests, when in cell
After number of users reduces, terminal can be successfully accessed the cell, reduce the time delay of business transmission compared with prior art.
If S306, the number of users for initiating access request in the unit time in cell are less than the channel capacity upper limit value of cell,
Determine the signal-to-noise ratio of terminal whether less than the second preset threshold.
Wherein, which is the intended recipient signal-to-noise ratio of terminal and the difference of target signal to noise ratio float value；
Illustratively, if Num in 1SAccess_UE< Volumch, the interior use for initiating access request of current one time cell
Amount is less than channel capacity upper limit value, determines that the number of users of current area access is smaller, does not cause access congestion.And at this
In the better position of signal and the terminal of channel not congestion but accesses cell not successfully, then with regard to need to further determine whether by
It is too poor in the signal-to-noise ratio of terminal, cause the terminal to access cell not successfully.For example, can by comparing terminal signal-to-noise ratio with
The size of second preset threshold determines whether the signal-to-noise ratio of terminal is too poor.
Illustratively, the signal-to-noise ratio (Signal Noise Ratio, SNR) of terminal, can be denoted as SNRUE, the terminal
Intended recipient signal-to-noise ratio can be denoted as SNRDj, indicate that the intended recipient SNR at the j of terminal position, target signal to noise ratio float
Value, can be denoted as Δ SNR, and the second preset threshold is SNRDj-ΔSNR.If SNRUE< SNRDjΔ SNR determines the noise of terminal
It is poorer than too.
If the signal-to-noise ratio of S307, terminal carries out covering grade upgrading less than the second preset threshold, to terminal.
Illustratively, if SNRUE< SNRDjΔ SNR determines that the signal-to-noise ratio of terminal is too poor.It should be understood that this feelings
Under condition the terminal access not successfully the reason of cell be present terminal SNR it is too poor, cause terminal access cell failure, therefore
Need to carry out the terminal upgrading of covering grade.For example, the terminal that the covering grade is 1 can be risen into covering grade 2,
So that the repetition access number of terminal increases, to be successfully accessed the cell.
The covering grade upgrade method that the embodiment of the present application proposes determines terminal by obtaining the covering grade i of terminal
Reference Signal Received Power RSRP whether less than the first preset threshold；If the RSRP of terminal is less than the first preset threshold, to end
End carries out covering grade upgrading；If the RSRP of terminal is greater than or equal to the first preset threshold, determines in the unit time and sent out in cell
Whether the number of users for playing access request is greater than or equal to the channel capacity upper limit value of cell；If initiating to connect in unit time cell
The number of users for entering request is greater than or equal to the channel capacity upper limit value of cell, does not carry out covering grade upgrading to the terminal；If
The number of users for initiating access request in unit time in cell is less than the channel capacity upper limit value of cell, determines the noise of terminal
Than whether less than the second preset threshold；If the signal-to-noise ratio of terminal is less than second preset threshold, covering grade is carried out to terminal
Upgrading.The embodiment of the present application according to the channel of the covering grade i of terminal, Reference Signal Received Power RSRP, cell by holding
Measure the signal-to-noise ratio of upper limit value and terminal, it is determined whether covering grade upgrading is carried out to terminal, so as to avoid existing due to user
In the preferable situation of signal quality, unsuccessful progress covering grade jump is accessed, user's access rate is low under the new covering grade of bring
The problem of.
The embodiment of the present application also provides a kind of covering grade update device, as shown in figure 4, the covering grade update device
400 include acquiring unit 401 and processing unit 402.
Wherein, acquiring unit 401, for obtaining the covering grade i, i=0,1 of terminal, 2, the terminal is the cell
Terminal in coverage area, the terminal access the cell not successfully.
Illustratively, the covering grade i of the terminal can be covering grade 0, covering grade 1 or covering grade 2.This Shen
Please embodiment covering grade locating for terminal is not defined, only with the covering grade of terminal be herein 1 to illustrate
Explanation.It should be understood that the terminal in the embodiment of the present application is to access the cell not successfully in a cell coverage area
Terminal.
Processing unit 402, for according to the covering grade i of the terminal, Reference Signal Received Power RSRP, described small
The channel capacity upper limit value in area and the signal-to-noise ratio of the terminal, it is determined whether covering grade upgrading is carried out to the terminal.
Whether processing unit 402, is specifically used for, determine the RSRP of the terminal less than the first preset threshold；Described first
Preset threshold is the boundary RSRP of the covering grade i and covering grade i+1.
Wherein, which is the boundary RSRP of covering grade i and covering grade i+1.
Illustratively, boundary RSRP is the RSRP for distinguishing different covering grades, and locating for boundary RSRP and terminal
Covering grade is related, for example, first preset threshold is covering grade 0 and covering grade 1 if the covering grade of terminal is 0
Demarcate RSRP, is denoted as RSRP1；If the covering grade of terminal is 1, which is covering grade 1 and covering grade 2
Boundary RSRP, be denoted as RSRP2.
Illustratively, the RSRP of terminal can be denoted as RSRPUE, the RSRP of above-mentioned comparison terminal and the first preset threshold
If the covering grade that size may include: terminal is 1, the RSRP of comparison terminalUEWith the size of RSRP2, to determine that terminal is current
In the better position of signal or signal difference point position.If RSRPUELess than RSRP2, it is not good enough to determine that the terminal is currently at signal
Position.If RSRPUEGreater than RSRP2, determine that the terminal is currently at the better position of signal.
If the RSRP of the terminal is less than first preset threshold, the processing unit 402 is also used to the terminal
Carry out covering grade upgrading.
Illustratively, if the RSRP of terminalUELess than RSRP2, processing unit 402 determine the received signal quality of terminal compared with
Difference, be in signal difference point position, then the reason of terminal accesses cell not successfully be the currently received signal quality of terminal compared with
Difference, thus can terminal directly to the signal difference point position carry out covering grade upgrading.For example, can be by the covering grade
Covering grade 2 is risen to for 1 terminal, so that the repetition access number of terminal increases, to be successfully accessed the cell.
If the RSRP of the terminal is greater than or equal to first preset threshold, the processing unit 402 is also used to really
Whether the number of users for determining to initiate access request in the cell in the unit time is greater than or equal in the channel capacity of the cell
Limit value.
Illustratively, if the RSRP of terminalUEMore than or equal to RSRP2, processing unit 402 determines the reception signal of terminal
Quality is preferable, is in the better position of signal, and should access not successfully cell in the terminal of the better position of signal, then just
It needs to further determine whether that the number of users accessed due to current area excessively causes channel capacity insufficient, causes the terminal not
It is successfully accessed cell.For example, can be by comparing on the number of users and cell channel capacity for initiating access request in the unit time
The size of limit value determines whether channel capacity deficiency.
Illustratively, the channel capacity upper limit value specifically:
Volumch=Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of cell, SystemchTo be
System sub-carrier number, β are channel capacity proportionality coefficient, 0≤β≤1.
Illustratively, the total bandwidth of NB-IoT network can be 180KHz, if what base station opened is between 15KHz subcarrier
Every then system subcarrier number can be Systemch=180/15=12；If what base station was opened is between 3.75KHz subcarrier
Every then system subcarrier number can be Systemch=180/3.75=48.The embodiment of the present application is for system subcarrier number
Occurrence be not defined, be merely illustrative herein.
Illustratively, the value of above-mentioned channel capacity proportionality coefficient β can be with 0 to 1 arbitrary number, the channel capacity ratio
Specific value the embodiment of the present application of factor beta is not defined, can empirically value.
Illustratively, the number of users for access request being initiated in unit time cell can be denoted as NumAccess_UE, the unit
Time can be 1S, if Num in 1SAccess_UE≥Volumch, the interior number of users for initiating access request of current one time cell
Greater than channel capacity upper limit value, determines that the number of users of current area access is excessive, cause access congestion；If Num in 1SAccess_UE
< Volumch, the interior number of users for initiating access request of current one time cell is less than channel capacity upper limit value, determining current small
The number of users of area's access is smaller, does not cause access congestion.
If the channel that the number of users for initiating access request in the unit time in the cell is greater than or equal to the cell holds
Upper limit value is measured, the processing unit 402 does not carry out covering grade upgrading to the terminal.
Illustratively, if Num in 1SAccess_UE≥Volumch, the interior use for initiating access request of current one time cell
Amount is greater than channel capacity upper limit value, determines that the number of users of current area access is excessive, causes access congestion.It should be understood that
In this case the terminal access not successfully the reason of cell be current area access number of users it is excessive, therefore terminal is not
It is successfully accessed the cell, at this point, terminal can be accessed without carrying out covering grade upgrading to the terminal with continuation requests, works as cell
After interior number of users reduces, terminal can be successfully accessed the cell.
It should be noted that in the prior art, at the better position of signal quality, when having great amount of terminals while accessing, if
Channel capacity deficiency leads to part terminal access failure, and terminal can still rise to next covering grade and attempt access, this will lead to industry
Business access number of repetition is big, and data retransmission times will be got higher after covering grade upgrading, when not only increasing this business
Prolong the access for having an effect on follow-up business.And the cut-in method of the embodiment of the present application is at the better position of signal quality, channel capacity
When congestion causes terminal to access not successfully, without carrying out the upgrading of covering grade, it can be accessed with continuation requests, when in cell
After number of users reduces, terminal can be successfully accessed the cell, reduce the time delay of business transmission compared with prior art.
If the number of users for initiating access request in the unit time in the cell is less than the channel capacity upper limit of the cell
Whether value, the processing unit 402 are also used to determine the signal-to-noise ratio of the terminal less than the second preset threshold；Described second is pre-
If threshold value is the intended recipient signal-to-noise ratio of the terminal and the difference of target signal to noise ratio float value.
Illustratively, if Num in 1SAccess_UE< Volumch, the interior use for initiating access request of current one time cell
Amount is less than channel capacity upper limit value, determines that the number of users of current area access is smaller, does not cause access congestion.And at this
In the better position of signal and the terminal of channel not congestion but accesses cell not successfully, then with regard to need to further determine whether by
It is too poor in the signal-to-noise ratio of terminal, cause the terminal to access cell not successfully.For example, can by comparing terminal signal-to-noise ratio with
The size of second preset threshold determines whether the signal-to-noise ratio of terminal is too poor.
Illustratively, the signal-to-noise ratio (Signal Noise Ratio, SNR) of terminal, can be denoted as SNRUE, the terminal
Intended recipient signal-to-noise ratio can be denoted as SNRDj, indicate that the intended recipient SNR at the j of terminal position, target signal to noise ratio float
Value, can be denoted as Δ SNR, and the second preset threshold is SNRDj-ΔSNR.If SNRUE< SNRDjΔ SNR determines the noise of terminal
It is poorer than too.
If the signal-to-noise ratio of the terminal is less than second preset threshold, the processing unit 402 was also used to the end
End carries out covering grade upgrading, and the covering grade i of terminal is risen to covering grade i+1.
Illustratively, if SNRUE< SNRDjΔ SNR determines that the signal-to-noise ratio of terminal is too poor.It should be understood that this feelings
Under condition the terminal access not successfully the reason of cell be present terminal SNR it is too poor, cause terminal access cell failure, therefore
Need to carry out the terminal upgrading of covering grade.For example, the terminal that the covering grade is 1 can be risen into covering grade 2,
So that the repetition access number of terminal increases, to be successfully accessed the cell.
The covering grade update device that the embodiment of the present application proposes obtains the covering grade i of terminal by acquiring unit,
Whether processing unit is used to determine the Reference Signal Received Power RSRP of terminal less than the first preset threshold；If the RSRP of terminal
Less than the first preset threshold, covering grade upgrading is carried out to terminal；If the RSRP of terminal is greater than or equal to the first preset threshold,
Determine whether the number of users for initiating access request in the unit time in cell is greater than or equal to the channel capacity upper limit value of cell；
If the number of users for initiating access request in unit time cell is greater than or equal to the channel capacity upper limit value of cell, not to described
Terminal carries out covering grade upgrading；If the channel that the number of users for initiating access request in the unit time in cell is less than cell holds
Upper limit value is measured, determines the signal-to-noise ratio of terminal whether less than the second preset threshold；If it is default that the signal-to-noise ratio of terminal is less than described second
Threshold value carries out covering grade upgrading to terminal.The embodiment of the present application according to the covering grade i of terminal, reference signal by receiving
Power RSRP, the channel capacity upper limit value of cell and the signal-to-noise ratio of terminal, it is determined whether covering grade upgrading is carried out to terminal,
So as to avoid accessing unsuccessful progress covering grade jump since user is in the preferable situation of signal quality, bring is new
The low problem of user's access rate under covering grade.
Using integrated unit, Fig. 5 shows the upgrading dress of covering grade involved in above-described embodiment
A kind of possible structural schematic diagram set.The covering grade update device 500 includes: memory module 501 and processing module 502.
Processing module 502 is for carrying out control management to the movement of covering grade update device, for example, processing module 502 is for supporting
Covering grade update device 500 executes the S301-S307 in Fig. 3, and/or other processes for techniques described herein.
Memory module 501, for storing the program code and data of computer.When above-mentioned memory module 501 is memory, processing mould
Block 502 can be processor.
The embodiment of the present application also provides a kind of computer readable storage medium, is stored in computer readable storage medium
One or more programs, one or more programs include instruction, are referred to when the processor of above-mentioned covering grade update device executes this
When enabling, which executes each step in method flow shown in above method embodiment.
The step of method in conjunction with described in present disclosure or algorithm can realize in a manner of hardware,
It can be and the mode of software instruction is executed by processor to realize.Software instruction can be made of corresponding software module, software
Module can be stored on random access memory (Random Access Memory, RAM), flash memory, erasable programmable only
Read memory (Erasable Programmable ROM, EPROM), Electrically Erasable Programmable Read-Only Memory
(Electrically EPROM, EEPROM), register, hard disk, mobile hard disk, CD-ROM (CD-ROM) or this field
In the storage medium of well known any other form.A kind of illustrative storage medium is coupled to processor, to make processor
Can be from the read information, and information can be written to the storage medium.Certainly, storage medium is also possible to handle
The component part of device.Pocessor and storage media can be located in ASIC.In addition, the ASIC can be set positioned at core network interface
In standby.Certainly, pocessor and storage media can also be used as discrete assembly and be present in core network interface equipment.
Those skilled in the art are it will be appreciated that in said one or multiple examples, function described in the invention
It can be realized with hardware, software, firmware or their any combination.It when implemented in software, can be by these functions
Storage in computer-readable medium or as on computer-readable medium one or more instructions or code passed
It is defeated.Computer-readable medium includes computer storage media and communication media, and wherein communication media includes being convenient for from a place
To any medium of another place transmission computer program.Storage medium can be general or specialized computer and can access
Any usable medium.
Above-described specific embodiment has carried out further the purpose of the present invention, technical scheme and beneficial effects
It is described in detail, it should be understood that being not used to limit this hair the foregoing is merely a specific embodiment of the invention
Bright protection scope, all any modification, equivalent substitution, improvement and etc. on the basis of technical solution of the present invention, done,
It should all include within protection scope of the present invention.
Claims (13)
1. a kind of covering grade upgrade method, which is characterized in that the described method includes:
Obtain the covering grade i, i=0,1 of terminal, 2, the terminal is the terminal in cell coverage area, the terminal not at
Function accesses the cell；
According to the covering grade i of the terminal, Reference Signal Received Power RSRP, the channel capacity upper limit value of the cell and institute
State the signal-to-noise ratio of terminal, it is determined whether covering grade upgrading is carried out to the terminal.
2. covering grade upgrade method according to claim 1, which is characterized in that it is described determine whether to the terminal into
The upgrading of row covering grade, comprising:
Determine the RSRP of the terminal whether less than the first preset threshold；First preset threshold be the covering grade i and
The boundary RSRP of covering grade i+1；
If the RSRP of the terminal is less than first preset threshold, covering grade upgrading is carried out to the terminal.
3. covering grade upgrade method according to claim 2, which is characterized in that it is described determine whether to the terminal into
The upgrading of row covering grade, further includes:
If the RSRP of the terminal is greater than or equal to first preset threshold, determines and initiate to connect in the cell in the unit time
Whether the number of users for entering request is greater than or equal to the channel capacity upper limit value of the cell；
If the number of users for initiating access request in the unit time in the cell is greater than or equal in the channel capacity of the cell
Limit value does not carry out covering grade upgrading to the terminal.
4. covering grade upgrade method according to claim 3, which is characterized in that it is described determine whether to the terminal into
The upgrading of row covering grade, further includes:
If the number of users for initiating access request in the unit time in the cell is less than the channel capacity upper limit value of the cell, really
Whether the signal-to-noise ratio of the fixed terminal is less than the second preset threshold；Second preset threshold is that the intended recipient of the terminal is believed
It makes an uproar than the difference with target signal to noise ratio float value；
If the signal-to-noise ratio of the terminal is less than second preset threshold, covering grade upgrading is carried out to the terminal.
5. covering grade upgrade method according to claim 1-4, which is characterized in that it is described to the terminal into
Row covering grade, which upgrades to, rises to covering grade i+1 for the covering grade i of the terminal.
6. covering grade upgrade method according to claim 1-5, which is characterized in that the channel of the cell holds
Measure upper limit value specifically:
Volumch=Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of the cell, SystemchTo be
System sub-carrier number, β are channel capacity proportionality coefficient, 0≤β≤1.
7. a kind of covering grade update device, which is characterized in that described device includes:
Acquiring unit, for obtaining the covering grade i, i=0,1 of terminal, 2, the terminal is in the cell coverage area
Terminal, the terminal access the cell not successfully；
Processing unit, for according to the covering grade i of the terminal, Reference Signal Received Power RSRP, the cell channel
The signal-to-noise ratio of maximum size value and the terminal, it is determined whether covering grade upgrading is carried out to the terminal.
8. covering grade update device according to claim 7, which is characterized in that the processing unit is specifically used for, really
Whether the RSRP of the fixed terminal is less than the first preset threshold；First preset threshold is the covering grade i and covering etc.
The boundary RSRP of grade i+1；
If the RSRP of the terminal is less than first preset threshold, the processing unit is also used to cover the terminal
Grade upgrading.
9. covering grade update device according to claim 8, which is characterized in that if the RSRP of the terminal is greater than or waits
In first preset threshold, the processing unit is also used to determine and initiates access request in the unit time in the cell
Whether number of users is greater than or equal to the channel capacity upper limit value of the cell；
If the number of users for initiating access request in the unit time in the cell is greater than or equal in the channel capacity of the cell
Limit value, the processing unit do not carry out covering grade upgrading to the terminal.
10. covering grade update device according to claim 9, which is characterized in that if in the unit time in the cell
The number of users for initiating access request is less than the channel capacity upper limit value of the cell, and the processing unit is also used to described in determination
Whether the signal-to-noise ratio of terminal is less than the second preset threshold；Second preset threshold be the terminal intended recipient signal-to-noise ratio with
The difference of target signal to noise ratio float value；
If the signal-to-noise ratio of the terminal is less than second preset threshold, the processing unit is also used to cover the terminal
The upgrading of lid grade.
11. according to the described in any item covering grade update devices of claim 7-10, which is characterized in that described to the terminal
Progress covering grade, which upgrades to, rises to covering grade i+1 for the covering grade i of the terminal.
12. according to the described in any item covering grade update devices of claim 7-11, which is characterized in that the channel of the cell
Maximum size value specifically:
Volumch=Systemch* (1+ β), wherein VolumchFor the channel capacity upper limit value of the cell, SystemchTo be
System sub-carrier number, β are channel capacity proportionality coefficient, 0≤β≤1.
13. a kind of computer storage medium, it is stored with computer program code in the computer storage medium, feature exists
In when the computer program code is run on a processor, so that the processor is executed such as any one of claim 1-6
The covering grade upgrade method.
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| CN201811015257.9A CN109168169B (en) | 2018-08-31 | 2018-08-31 | Coverage grade upgrading method and device |
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| CN201811015257.9A CN109168169B (en) | 2018-08-31 | 2018-08-31 | Coverage grade upgrading method and device |
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| CN109168169B (en) | 2021-10-19 |
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