CN109862611A - Terminal power control method and device - Google Patents
Terminal power control method and device Download PDFInfo
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- CN109862611A CN109862611A CN201910204795.0A CN201910204795A CN109862611A CN 109862611 A CN109862611 A CN 109862611A CN 201910204795 A CN201910204795 A CN 201910204795A CN 109862611 A CN109862611 A CN 109862611A
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Abstract
The application provides a kind of terminal power control method and device, is related to the communications field, can reduce uplink interference when first terminal carries out the upgrading of coverage enhancement grade, inhibit the lifting of base station bottom noise.This method comprises: if it is determined that the upgrading of first terminal progress coverage enhancement grade, then determine the preamble power offset of the first terminal according to the terminal quantity of the terminal quantity of first area, second area；The transmission power of the first terminal is determined according to the preamble power offset and first terminal path loss.
Description
Technical field
This application involves the communications field more particularly to a kind of terminal power control method and device.
Background technique
Narrowband Internet of Things (narrow band internet of things, NB-IoT) is assisted based on 3GPP LTE standard
The technology of Internet of things for discussing evolution, is mainly directed towards middle low rate, depth covering, low-power consumption, the Internet of Things application scenarios connected greatly, has
There is frequency spectrum resource utilization rate height, support a large amount of middle low speed users, overburden depth big and the technical advantages such as power consumption of terminal is low.
As shown in Figure 1, the network architecture of NB-IoT system includes: the terminal (such as user equipment (UE)) of NB-IoT system, base
It stands (such as eNodeB), packet-based core networks (EPC), IoT platform (connection management platform) and application server.Currently, NBIoT system
System supports three kinds of coverage enhancement grades (coverage enhanment level, CEL), as shown in Fig. 2, respectively CEL0,
CEL1 and CEL2.
The definition mode of prior art CEL0, CEL1 and CEL2 are as follows: centered on base station eNodeB, reference signal is received
Power (reference signal receiving power, RSRP) is less than terminal in the regional scope of 144dB (decibel)
Coverage enhancement grade is CEL0；RSRP is greater than 144dB and less than the coverage enhancement grade of terminal in 154dB regional scope
It is CEL2 that CEL1, RSRP, which are greater than 154dB and are less than the coverage enhancement grade of terminal in 164dB regional scope,.
NB-IoT up channel includes two kinds of physical channels, and one is narrowband physics channel uplinks to share channel (narrow
Band physical uplink shared channel, NPUSCH), another kind is narrowband Physical Random Access Channel
(narrowband physical random access channel, NPRACH).Wherein, NPRACH is that terminal starts to initiate
Access channel when calling.NPRACH can be information number of repetition (covering etc. of different coverage enhancement grade setting fixations
Grade is higher, and number of repetition is bigger).In this process, terminal can adjust the transmission power of oneself to meet coverage enhancement grade
The demand of upgrading.
Based on above-mentioned rule, under coverage enhancement grade CELi (i is integer, and 0≤i≤2), terminal request access base station
Trial access procedure it is as follows: in NPRACH, terminal attempts access base station every time with the corresponding information number of repetition of CELi, when
Terminal can not still access after accessing the information number of repetition for reaching fixed under certain coverage enhancement grade, then terminal will be from working as
Preceding coverage enhancement grade rises to more higher leveled coverage enhancement grade and again attempts to access.Wherein, coverage enhancement grade liter
Correspondence increases information number of repetition after grade, so as to effectively increase the probability that terminal is successfully accessed base station.Currently, working as terminal
Coverage enhancement grade is CEL0, and terminal generallys use PRACH power ramping mechanism and carries out power control, power control
The Actual path loss between terminal and base station be joined in the process as the factor for influencing watt level；But terminal exists
CEL1 and CEL2 are all made of maximum transmission power, lead to terminal meeting after carrying out the upgrading of coverage enhancement grade in NBIoT system
Higher uplink interference is generated, base station bottom noise lifting is serious, and the above problem is substantially since the coverage enhancement grade of terminal is
When CEL1 CEL2, caused by terminal transmission power and base station to the mismatch between the Actual path loss of terminal.
Summary of the invention
The application provides a kind of terminal power control method and device, can reduce uplink interference, inhibits base station bottom noise
Lifting.
In order to achieve the above objectives, the application adopts the following technical scheme that
In a first aspect, the application provides a kind of terminal power control method, this method may include: if it is determined that first terminal
The upgrading of coverage enhancement grade is carried out, then determines described the according to the terminal quantity of the terminal quantity of first area, second area
The preamble power offset of one terminal, the first area are that the interference strength that first terminal generates is less than or equal to first threshold
Region, the second area be first terminal generate interference strength be greater than first threshold and be less than second threshold region；
The transmission power of the first terminal is determined according to the preamble power offset and first terminal path loss.
Second aspect, the application provide a kind of device, which includes: first processing module and Second processing module.Its
In, first processing module is used for if it is determined that first terminal carries out the upgrading of coverage enhancement grade, then according to the terminal of first area
Quantity, second area terminal quantity determine the preamble power offset of the first terminal, the first area is first
The interference strength that terminal generates is less than or equal to the region of first threshold, and the second area is the interference strength that first terminal generates
Greater than first threshold and less than the region of second threshold；Second processing module, for according to the preamble power offset with
And first terminal path loss determines the transmission power of the first terminal.
The third aspect, the application provide a kind of device, which includes: processor, transceiver and memory.Wherein, it deposits
Reservoir is for storing one or more programs.The one or more program includes computer executed instructions, when the apparatus is operative,
Processor executes the computer executed instructions of memory storage, so that the device executes first aspect and its various optional
In implementation it is one of any described in terminal power control method.
Fourth aspect, the application provide a kind of computer readable storage medium, are stored in computer readable storage medium
Instruction, when computer executes the instruction, which, which executes in above-mentioned first aspect and its various optional implementations, appoints
Terminal power control method described in one of meaning.
5th aspect, the application provides a kind of computer program product comprising instruction, when the computer program product
When running on computers so that the computer execute in above-mentioned first aspect and its various optional implementations it is any it
Terminal power control method described in one.
Terminal power control method and device provided by the present application, however, it is determined that the liter of first terminal progress coverage enhancement grade
Grade, then determine that the preamble power of the first terminal is inclined according to the terminal quantity of the terminal quantity of first area, second area
Shifting amount；The transmission power that first terminal is determined according to the preamble power offset and first terminal path loss makes
The transmission power and coverage enhancement grade of one terminal and the quantity of neighboring area terminal are adapted, to reduce uplink interference, are pressed down
The lifting of base station bottom noise processed.
Detailed description of the invention
Fig. 1 is the network architecture schematic diagram of terminal power control method and device provided by the embodiments of the present application application；
Fig. 2 is coverage enhancement level diagram provided by the embodiments of the present application；
Fig. 3 is terminal power control method schematic diagram provided by the embodiments of the present application；
Fig. 4 is region division schematic diagram one provided by the embodiments of the present application；
Fig. 5 is region division schematic diagram two provided by the embodiments of the present application；
Fig. 6 is the structural schematic diagram one of device provided by the embodiments of the present application；
Fig. 7 is the structural schematic diagram two of device provided by the embodiments of the present application.
Specific embodiment
Terminal power control method provided by the embodiments of the present application, apparatus and system are carried out in detail with reference to the accompanying drawing
Description.
The terms "and/or", only a kind of incidence relation for describing affiliated partner, indicates that there may be three kinds of passes
System, for example, A and/or B, can indicate: individualism A exists simultaneously A and B, these three situations of individualism B.
Term " first " and " second " in the description of the present application and attached drawing etc. be for distinguishing different objects, or
Person is used to distinguish the different disposal to same target, rather than is used for the particular order of description object.
In addition, the term " includes " being previously mentioned in the description of the present application and " having " and their any deformation, it is intended that
It is to cover and non-exclusive includes.Such as the process, method, system, product or equipment for containing a series of steps or units do not have
It is defined in listed step or unit, but optionally further comprising the step of other are not listed or unit, or optionally
It further include the other step or units intrinsic for these process, methods, product or equipment.
It should be noted that in the embodiment of the present application, " illustrative " or " such as " etc. words make example, example for indicating
Card or explanation.Be described as in the embodiment of the present application " illustrative " or " such as " any embodiment or design scheme do not answer
It is interpreted than other embodiments or design scheme more preferably or more advantage.Specifically, " illustrative " or " example are used
Such as " word is intended to that related notion is presented in specific ways.
In the description of the present application, unless otherwise indicated, the meaning of " plurality " is refer to two or more.
The embodiment of the present application provides a kind of terminal power control method, as shown in figure 3, this method may include S101-
S103:
S101, judge whether first terminal carries out the upgrading of covering grade.
Wherein, the NB-IoT terminal in first terminal, that is, NB-IoT system, is specifically as follows user equipment (UE), such as: mobile phone,
Computer can also be cellular phone, wireless phone, Session initiation Protocol (session initiation protocol, SIP)
Phone, smart phone, wireless local loop (wireless local loop, WLL) are stood, personal digital assistant (personal
Digital assistant, PDA), tablet computer, laptop computer, hand-held communication device, Handheld computing device, defend
Star wireless device, wireless modem card, TV set-top box (set top box, STB), customer premises equipment, CPE (customer
Premise equipment, CPE) and/or other equipment for being communicated on wireless system.
Specifically, the lead code for obtaining first terminal attempts access number and first terminal current coverage enhancement grade
Lead code maximum attempts access number.Wherein, lead code attempts access number (num preamble attemptCE) i.e. first
Terminal attempts the number of access base station side under current covering grade based on lead code.Lead code maximum attempts access number (max
Num preamble attemptCE) i.e. base station side allow the current covering grade of first terminal under attempt access base station side maximum
Number of attempt.In specific implementation, in NB-IoT system, for tri- kinds of coverage enhancement grades of CEL0, CEL1 and CEL2, every kind
Coverage enhancement grade is equipped with corresponding resource configuration parameter, and lead code maximum attempts access number and is included in above-mentioned money
In the configuration parameter of source.
Then, judge that lead code attempts whether access number is equal to lead code maximum trial access number, if judging result
Be it is no, then first terminal continues to attempt to access base station with current coverage enhancement grade；If the determination result is YES, then first is obtained eventually
Hold the Reference Signal Received Power and preset reference letter of current coverage enhancement grade and next coverage enhancement grade critical point
Number receive power float value.Wherein, next coverage enhancement grade is corresponding covering after current coverage enhancement grade elevated by one step
Enhance grade.Specifically, if current coverage enhancement grade is CELi, next coverage enhancement grade is CEL (i+1), next to cover
The Reference Signal Received Power of lid enhancing grade critical point is RSRPi.Preset Reference Signal Received Power is arranged simultaneously to float
Value is △ RSRP.
Next, it is determined that whether the terminal references signal reception power of first terminal is less than or equal to Reference Signal Received Power
With the difference of preset Reference Signal Received Power float value, that is, judge whether to meet RSRP_UE_CEi≤RSRPi- △ RSRP.
If judging result be it is no, first terminal continues to attempt to access base station with current coverage enhancement grade；If the determination result is YES, then
First terminal carries out the upgrading of coverage enhancement grade, executes step S103.
Wherein, preset Reference Signal Received Power float value can be carried out according to the actual situation by those skilled in the art
Setting, the application are not construed as limiting this.
S102, the leading of the first terminal is determined according to the terminal quantity of first area, the terminal quantity of second area
Code power offset.
The first area is the region that the interference strength that first terminal generates is less than or equal to first threshold, secondth area
Domain is that the interference strength that first terminal generates is greater than first threshold and is less than the region of second threshold.
Specifically, the interference strength that first terminal generates can be characterized by receiving the RSRP of first terminal, i.e., with it
Its terminal receives the difference of the RSRP of first terminal and divides different zones.Illustratively, setting first area is in this area
The RSRP that other terminals in domain receive first terminal is less than or equal to the region of 3dBm, and second area is in this area its
The RSRP that its terminal receives first terminal is greater than the region that 3dBm is less than or equal to 9dBm.
Then, it is determined that in first area in the quantity N1 and second area of all terminals all terminals quantity N2.
Then, the preamble power offset is calculated using following formula:
Preamble power offset DELTA_PREAMBLE=△ * [1-N1/ (N1+N2)], wherein △ is preset target
Signal reception power float value.Preset echo signal receives power float value can be by those skilled in the art according to practical feelings
Condition is configured, and the application is not construed as limiting this.
It should be noted that as shown in figure 4, end under identical transmission power, on the position closer from first terminal
The suffered interference in end is stronger, therefore in the case where the terminal quantity of second area is certain, closer to the firstth area of first terminal
Terminal number accounting in domain is bigger, then the value of DELTA_PREAMBLE should be smaller, to reduce because transmission power is too greatly to week
Enclose terminal and bring is interfered.
S103, the hair that the first terminal is determined according to the preamble power offset and first terminal path loss
Penetrate power.
Specifically, calculating the transmission power of the first terminal using following formula:
PNPRACH=min { PCMAX-N.C(i), NPRTP+PLc } and [dBm],
Wherein, PNPRACHFor the transmission power of the first terminal；PCMAX-N.C(i)Serving cell C is directed to for NB-IoT system
In the terminal maximum transmission power of subframe i (i is integer, and 0≤i≤1) configuration；NPRTP is narrowband reference signal reception power；
PLc is path loss of the base station to first terminal.The transmission power P of above-mentioned formula expression first terminalNPRACHEqual to PCMAX-N.C(i)
With the minimum value in the sum of NPRTP, PLc.The embodiment of the present application selects minimum value therein from above-mentioned two value to determine
One terminal transmission power makes first terminal transmission power and the Actual path loss of base station to terminal match, compared to existing
Technology reduces first terminal power emission to terminal bring interference strength around.
The PLc=RSRP_UE_CELi-RS,
Wherein, RSRP_UE_CELi is the RSRP of the first terminal at i-th of coverage enhancement grade CELi.RS is base station hair
Penetrate signal power reference level.
NPRTP=Preamble_IRTP+DELTA_PREAMBLE+ (Preamble_TC-1) the * PR_Step-10*lg
(numRPPA),
Wherein, Preamble_IRTP is that lead code initial target receives power；DELTA_PREAMBLE is in step S102
Obtained preamble power offset；Preamble_TC is the access number of first terminal；PR_Step is that preset power is passed
Increase step-length；NumRPPA is lead code number of retransmissions.
Optionally, in S102 step, three regions can also be divided into: received from first terminal with terminal location institute
RSRP on the basis of, be divided into RSRP < 3dBm, 3dBm < RSRP < 6dBm, tri- regions 6dBm < RSRP < 9dBm.It is ideal
In the case of, terminal location the received RSRP from first terminal with its to directly proportional at a distance from first terminal.Therefore, as schemed
Shown in 5, three circles will be formed by the center of circle of first terminal position, three round radiuses are respectively R1, R2, R3, are respectively corresponded
RSRP is the position of 3dBm, 6dBm, 9dBm.To RSRP < 3dBm, 3dBm < RSRP < 6dBm, 6dBm < RSRP < 9dBm
Three regions can be expressed as using first terminal position as a circle (radius R1) in the center of circle and two annular (rings
Width is respectively R2-R1 and R3-R2).Above-mentioned border circular areas and two annular regions according to at a distance from first terminal from the near to the remote
Successively it is set as first area, second area, third region.
Correspondingly, the step of determining DELTA_PREAMBLE is as follows:
Firstly, using following formula to calculate is taking the first terminal as unit area in circle of the center of circle using R3 as radius
Terminal density:
ρ=Num_total_R3/(R3)2,
Wherein, ρ is the unit area user density；Num_total_R3For total number of terminals in the circle；
Then, the preamble power offset is calculated using following formula:
A=Num_total_R1/ ρ,
B=Num_total_R2-1/ ρ,
C=Num_total_R3-2/ ρ,
Preamble power offset DELTA_PREAMBLE=△ * [1-A/ (A+B+C)],
Wherein, Num_total_R1For the quantity of all terminals in the first area；Num_total_R2-1It is described
The quantity of all terminals in second area；Num_total_R3-2For the quantity of all terminals in the third region；△ is default
Reference Signal Received Power float value.
Terminal power control method provided by the present application, when first terminal carries out the upgrading of coverage enhancement grade, according to
The terminal quantity of first area, the terminal quantity of second area determine the preamble power offset of first terminal, then basis
The preamble power offset and first terminal path loss determine the transmission power of the first terminal, make first terminal
Transmission power and the quantity of coverage enhancement grade and neighboring area terminal be adapted, to reduce uplink interference, inhibit base station
The lifting that bottom is made an uproar.
The embodiment of the present application can carry out the division of functional module or functional unit according to above method example to device,
For example, each functional module of each function division or functional unit can be corresponded to, it can also be by two or more function
It can be integrated in a processing module.Above-mentioned integrated module both can take the form of hardware realization, can also use software
Functional module or the form of functional unit are realized.It wherein, is signal to the division of module or unit in the embodiment of the present application
Property, only a kind of logical function partition, there may be another division manner in actual implementation.
Fig. 6 shows a kind of possible structural schematic diagram of device involved in above-described embodiment.The device includes the
One processing module 201, Second processing module 202.
Wherein, the first processing module 201, for if it is determined that first terminal carries out the upgrading of coverage enhancement grade, then
The preamble power offset of the first terminal is determined according to the terminal quantity of the terminal quantity of first area, second area,
The first area is the region that the interference strength that first terminal generates is less than or equal to first threshold, and the second area is first
The interference strength that terminal generates is greater than first threshold and is less than the region of second threshold.
The Second processing module 202, for according to the preamble power offset and first terminal path loss
Determine the transmission power of the first terminal.
Optionally, the first processing module 201, if the access number of first terminal has reached maximum access number, and the
The Reference Signal Received Power RSRP of one terminal is less than default RSRP, it is determined that the liter of first terminal progress coverage enhancement grade
Grade.
Optionally, the first processing module 202 is also used to determine the terminal quantity of first area and second area；It adopts
The preamble power offset: the preamble power offset=△ * [number of terminals of the first area 1- is calculated with following formula
Amount/(terminal quantity+second area terminal quantity of first area)], wherein △ is floating for preset Reference Signal Received Power
Dynamic value.
Optionally, the Second processing module 202 is also used to calculate the transmitting function of the first terminal using following formula
Rate: PNPRACH=min { PCMAX-N.C(i), NPRTP+PLc } and [dBm]；Wherein, PNPRACH is the transmitting function of the first terminal
Rate；PCMAX-N.C(i)The terminal maximum transmission power that serving cell C is configured in subframe i is directed to for the NB-IoT system；NPRTP is
Narrowband reference signal reception power；PLc is path loss of the base station to first terminal；Wherein, the PLc=RSRP_UE_
CELi-RS；RSRP_UE_CELi is the RSRP of the first terminal at i-th of coverage enhancement grade CELi；RS is Base Transmitter letter
Number power reference level；Wherein, i is integer, and 0≤i≤1；The NPRTP=Preamble_IRTP+DELTA_PREAMBLE
+(Preamble_TC-1)*PR_Step-10*lg(numRPPA)；Preamble_IRTP is that lead code initial target receives function
Rate, DELTA_PREAMBLE are preamble power offset；Preamble_TC is the access number of first terminal；PR_Step is
Power increment step-length；NumRPPA is lead code number of retransmissions.
Fig. 7 shows another possible structural representation of terminal power control device involved in above-described embodiment
Figure.The device includes: processor 301 and communication interface 302.Processor 301 is for carrying out control management, example to the movement of device
Such as, the step of executing above-mentioned first processing module 201, the execution of Second processing module 202, and/or it is described herein for executing
Technology other processes.Communication interface 302 is used to support the communication of device Yu other network entities.Device can also include depositing
Reservoir 303 and bus 304, memory 303 are used for the program code and data of storage device.
Wherein, memory 303 can be memory in device etc., which may include volatile memory, example
Such as random access memory；The memory also may include nonvolatile memory, such as read-only memory, flash memory,
Hard disk or solid state hard disk；The memory can also include the combination of the memory of mentioned kind.
Above-mentioned processor 301 can be realization or execute to combine and various illustratively patrols described in present disclosure
Collect box, module and circuit.The processor can be central processing unit, general processor, digital signal processor, dedicated integrated
Circuit, field programmable gate array or other programmable logic device, transistor logic, hardware component or it is any
Combination.It, which may be implemented or executes, combines various illustrative logic blocks, module and electricity described in present disclosure
Road.The processor be also possible to realize computing function combination, such as comprising one or more microprocessors combine, DSP and
The combination etc. of microprocessor.
Bus 304 can be expanding the industrial standard structure (extended industry standard
Architecture, EISA) bus etc..Bus 304 can be divided into address bus, data/address bus, control bus etc..For convenient for table
Show, only indicated with a thick line in Fig. 7, it is not intended that an only bus or a type of bus.
The embodiment of the present application also provides a kind of computer readable storage medium, and finger is stored in computer readable storage medium
It enables, when the network equipment executes the instruction, which executes network in method flow shown in above method embodiment and set
The standby each step executed.
Wherein, computer readable storage medium, such as electricity, magnetic, optical, electromagnetic, infrared ray can be but not limited to or partly led
System, device or the device of body, or any above combination.The more specific example of computer readable storage medium is (non-poor
The list of act) it include: the electrical connection with one or more conducting wires, portable computer diskette, hard disk, random access memory
(random access memory, RAM), read-only memory (read-only memory, ROM), erasable type may be programmed read-only
It is memory (erasable programmable read only memory, EPROM), register, hard disk, optical fiber, portable
Compact disc read-only memory (compact disc read-only memory, CD-ROM), light storage device, magnetic memory
The computer readable storage medium of part or above-mentioned any appropriate combination or any other form well known in the art.
A kind of illustrative storage medium is coupled to processor, to enable a processor to from the read information, and can be to
Information is written in the storage medium.Certainly, storage medium is also possible to the component part of processor.Pocessor and storage media can be with
In application-specific IC (Application Specific Integrated Circuit, ASIC).In the application
In embodiment, computer readable storage medium can be any tangible medium for including or store program, which can be referred to
Enable execution system, device or device use or in connection.
The above, the only specific embodiment of the application, but the protection scope of the application is not limited thereto, it is any
Change or replacement within the technical scope of the present application should all be covered within the scope of protection of this application.Therefore, this Shen
Protection scope please should be subject to the protection scope in claims.
Claims (11)
1. a kind of terminal power control method characterized by comprising
If it is determined that first terminal carries out the upgrading of coverage enhancement grade, then according to the terminal quantity of first area, second area
Terminal quantity determines the preamble power offset of the first terminal, and the first area is that the interference that first terminal generates is strong
Degree is less than or equal to the region of first threshold, and the second area is that the interference strength that first terminal generates is greater than first threshold and small
In the region of second threshold；
The transmission power of the first terminal is determined according to the preamble power offset and first terminal path loss.
2. the method according to claim 1, wherein the determining first terminal carries out the liter of coverage enhancement grade
Grade, comprising:
If the access number of first terminal has reached maximum access number, and the Reference Signal Received Power RSRP of first terminal is less than
Default RSRP, it is determined that the upgrading of first terminal progress coverage enhancement grade.
3. the method according to claim 1, wherein the terminal quantity according to first area, second area
Terminal quantity determine the preamble power offset of the first terminal, comprising:
Determine the terminal quantity of first area and second area；
The preamble power offset is calculated using following formula:
Preamble power offset=△ * [the terminal quantity of the first area 1-/(terminal quantity+second area of first area
Terminal quantity)], wherein △ is preset Reference Signal Received Power float value.
4. method according to any one of claims 1 to 3, which is characterized in that described to be deviated according to the preamble power
Amount and first terminal path loss determine the transmission power of the first terminal, comprising:
The transmission power of the first terminal is calculated using following formula:
PNPRACH=min { PCMAX-N.C(i), NPRTP+PLc } and [dBm]；
Wherein, PNPRACHFor the transmission power of the first terminal；PCMAX-N.C(i)Serving cell C is directed to for the NB-IoT system
In the terminal maximum transmission power of subframe i configuration；NPRTP is narrowband reference signal reception power；PLc is base station to first terminal
Path loss；
Wherein, the PLc=RSRP_UE_CELi-RS；
RSRP_UE_CELi is the RSRP of the first terminal at i-th of coverage enhancement grade CELi；RS is Base Transmitter signal function
Rate reference level；Wherein, i is integer, and 0≤i≤1；
NPRTP=Preamble_IRTP+DELTA_PREAMBLE+ (Preamble_TC-1) the * PR_Step-10*lg
(numRPPA)；
Preamble_IRTP is that lead code initial target receives power, DELTA_PREAMBLE is preamble power offset；
Preamble_TC is the access number of first terminal；PR_Step is power increment step-length；NumRPPA is lead code re-transmission time
Number.
5. a kind of terminal power control device characterized by comprising
First processing module, for if it is determined that first terminal carries out the upgrading of coverage enhancement grade, then according to the end of first area
End quantity, second area terminal quantity determine the preamble power offset of the first terminal, the first area is the
The interference strength that one terminal generates is less than or equal to the region of first threshold, and the second area is that the interference that first terminal generates is strong
Degree is greater than first threshold and is less than the region of second threshold；
Second processing module, for determining described first according to the preamble power offset and first terminal path loss
The transmission power of terminal.
6. device according to claim 5, which is characterized in that
The first processing module, if the access number for being also used to first terminal has reached maximum access number, and first terminal
Reference Signal Received Power RSRP is less than default RSRP, it is determined that the upgrading of first terminal progress coverage enhancement grade.
7. device according to claim 5, which is characterized in that
The first processing module is also used to determine the terminal quantity of first area and second area；
The preamble power offset is calculated using following formula:
Preamble power offset=△ * [the terminal quantity of the first area 1-/(terminal quantity+second area of first area
Terminal quantity)], wherein △ is preset Reference Signal Received Power float value.
8. according to any device of claim 5-7, which is characterized in that
The Second processing module is also used to calculate the transmission power of the first terminal using following formula:
PNPRACH=min { PCMAX-N.C(i), NPRTP+PLc } and [dBm]；
Wherein, PNPRACHFor the transmission power of the first terminal；PCMAX-N.C(i)Serving cell C is directed to for the NB-IoT system
In the terminal maximum transmission power of subframe i configuration；NPRTP is narrowband reference signal reception power；PLc is base station to first terminal
Path loss；
Wherein, the PLc=RSRP_UE_CELi-RS；
RSRP_UE_CELi is the RSRP of the first terminal at i-th of coverage enhancement grade CELi；RS is Base Transmitter signal function
Rate reference level；Wherein, i is integer, and 0≤i≤1；
NPRTP=Preamble_IRTP+DELTA_PREAMBLE+ (Preamble_TC-1) the * PR_Step-10*lg
(numRPPA)；
Preamble_IRTP is that lead code initial target receives power, DELTA_PREAMBLE is preamble power offset；
Preamble_TC is the access number of first terminal；PR_Step is power increment step-length；NumRPPA is lead code re-transmission time
Number.
9. a kind of terminal power control device, which is characterized in that described device includes: processor, transceiver and memory；Its
In, memory is for storing one or more programs；The one or more program includes computer executed instructions, when the device is transported
When row, processor executes the computer executed instructions of memory storage, so that the device perform claim requires to appoint in 1 to 4
Terminal circule power control method described in one of meaning.
10. a kind of computer readable storage medium, it is stored with instruction in computer readable storage medium, is referred to when computer executes this
When enabling, the computer execute it is one of any in the claims 1 to 4 described in terminal circule power control method.
11. a kind of computer program product comprising instruction, when the computer program product is run on computers, the meter
Calculation machine execute it is one of any in the claims 1 to 4 described in terminal circule power control method.
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| CN109862611B (en) | 2022-02-18 |
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