CN104540207A - Terminal transmission power control method and device - Google Patents
Terminal transmission power control method and device Download PDFInfo
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- CN104540207A CN104540207A CN201410818589.6A CN201410818589A CN104540207A CN 104540207 A CN104540207 A CN 104540207A CN 201410818589 A CN201410818589 A CN 201410818589A CN 104540207 A CN104540207 A CN 104540207A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
- H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/36—TPC using constraints in the total amount of available transmission power with a discrete range or set of values, e.g. step size, ramping or offsets
- H04W52/365—Power headroom reporting
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Abstract
The invention relates to the field of communication, in particular to a terminal transmission power control method and device. The method and device aim to lower network interference among terminals and meanwhile maintain a higher uplink rate. According to the method, in a subframe i, a base station calculates transmission rate influence factors; when the power headroom (PHR) reported by the terminal determines that the PHR is equal to or smaller than zero, whether the transmission rate influence factors of the terminals are smaller than a first threshold value or not or whether the TPC sum is equal to zero or not is further judged; when it is determined that the transmission rate influence factors are smaller than the first threshold or the TPC sum is equal to zero, the TPC is issued to lower the transmission power of the terminals, the problem that the actual transmission power control result of the terminals is unmatched with the actual channel transmission capacity is solved, the purposes that network interference among the terminals is lowered while a higher uplink rate is maintained are achieved, and the transmission power of the terminals and the uplink rate reach a proper balance point.
Description
Technical field
The present invention relates to the communications field, particularly relate to a kind of method and device of control terminal transmitting power.
Background technology
At Long Term Evolution (Long Term Evolution, LTE) in system, terminal is by expectation received power value, circuit loss value, scheduling Physical Resource Block (Physical Resource Block, PRB) number, modulating-coding grade estimates transmitting power base value, base station is by Physical Downlink Control Channel (Physical DownlinkControl Channel, PDCCH) power control commands word (Transmit Power Control is carried in, TPC) control terminal transmitting power raises, lower or keep, namely terminal determines actual emission power based on point transmitting power base value estimated and the TPC received, wherein according to the form of the DCI in PDCCH, TPC can have multiple value, refer to agreement 3GPP TS 36.213.
In prior art, for given wireless channel, when the transmitting power of terminal is lower, upstream rate promotes along with the raising of power, but after the transmitting power of terminal reaches certain level, then again bring to power to the lifting DeGrain of speed.If but the transmitting power of terminal is too high, can power dissipation be produced and affect stand-by time, also can produce interference to other users, even may cause its own signal distortion.
Therefore, uplink power control is an extremely important technology.Base station needs to carry out control terminal transmitting power by issuing power control commands word, to ensure that upstream data effectively transmits and saves power as far as possible.Existing uplink power control strategy normally sets the desired value of a certain wireless parameter, such as target received power, target signal to noise ratio.When actual measured value sends out rise TPC lower than base station during desired value, adjust TPC higher than giving during desired value.But, because desired value does not associate upstream rate, neither according to path loss, Reference Signal Received Power (Reference Signal Received Power, etc. RSRP) target signal to noise ratio of the best determined of wireless parameter or target received power, therefore cause the transmitting power of terminal reality to control result and do not mate with actual channel transmittability.Concrete, this only to reach the ascending power control method that desired value is foundation, may following three point problem be there is:
One, upstream rate may reach the upper limit before reaching target signal to noise ratio or target received power, if now raise terminal transmit power more only can cause power dissipation and network interferences.
They are two years old, if target signal to noise ratio or received power arrange too low, then the transmitting power of terminal is controlled in lower level, thus limits up modulation and coding strategy (Modulation and Coding Scheme, MCS), cause upstream rate not high.
They are three years old, when disturbing larger between terminal, need the transmitting power reducing high power-terminal, but the high transmit power of some of them terminal is necessary to its upstream rate of maintenance, and the high transmit power of some terminal is non-essential to its upstream rate of maintenance.Therefore, can not judge that the high transmit power of which terminal needs adjustment for the concrete channel situation of different terminals, unified adjustment also makes upstream rate obviously reduce while only causing reducing interference.
Summary of the invention
The embodiment of the present invention provides a kind of method and device of control terminal transmitting power, controls result and the unmatched problem of actual channel transmittability in order to solve in prior art the transmitting power that there is terminal reality.
The concrete technical scheme that the embodiment of the present invention provides is as follows:
A method for control terminal transmitting power, comprising:
In subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence;
When base station determines that PHR is not more than zero by the power headroom PHR of terminal to report, judge whether that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum equals 0 further;
Base station determines that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum when equaling 0, issues the transmitting power that TPC lowers terminal.
Therefore, base station carries out power adjustment by the PHR of terminal to report to the terminal satisfied condition, and reduces between terminal and maintains higher upstream rate while network interferences.
Preferably, in subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the TPC sum of terminal in section, calculate transmission rate factor of influence, comprising:
In subframe i, base station just passes Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculates compared to subframe i-n, the changing value of the transmission rate of terminal, and wherein, n is setup parameter;
Base station calculates the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k, and wherein, the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, and k is setup parameter;
Using the ratio of changing value and TPC sum as transmission rate factor of influence.
Preferably, by the PHR of terminal to report, base station determines that PHR is greater than zero, or, determine that PHR is not more than zero and the transmission rate factor of influence of terminal is not less than the first threshold value and TPC sum when being not equal to 0, comprise further:
Base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further;
If so, then according to the difference of target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted;
Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
Therefore, different target signal to noise ratio is set for the far and near different terminal in distance base station, by calculating transmission rate factor of influence, closed loop adjustment is carried out to the transmitting power of terminal, makes the balance point that the transmitting power of terminal and upstream rate reach suitable.
Preferably, base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further, if, the then difference of foundation target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted, specifically comprises:
If base station determines that the value of transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Or,
If base station determines that the value of transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
Preferably, comprise further:
When base station determines that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
When base station determines that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
Preferably, comprise further:
Base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum equals 0 time, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
A device for control terminal transmitting power, comprising:
Computing unit, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence;
First processing unit, during for determining that PHR is not more than zero by the power headroom PHR of terminal to report, judges whether that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum equals 0 further;
Transmitting element, for determine the transmission rate factor of influence of terminal be less than the first threshold value or TPC sum equal 0 time, issue the transmitting power that TPC lowers terminal.
Therefore, base station carries out power adjustment by the PHR of terminal to report to the terminal satisfied condition, and reduces between terminal and maintains higher upstream rate while network interferences.
Preferably, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the TPC sum of terminal in section, when calculating transmission rate factor of influence, computing unit is used for:
In subframe i, just pass Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculate compared to subframe i-n, the changing value of the transmission rate of terminal, wherein, n is setup parameter;
Calculate the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k, wherein, the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, and k is setup parameter;
And using the ratio of changing value and TPC sum as transmission rate factor of influence.
Preferably, determine that PHR is greater than zero by the PHR of terminal to report, or, determine that PHR is not more than zero and the transmission rate factor of influence of terminal is not less than the first threshold value and TPC sum when being not equal to 0, comprise further:
Second processing unit, for determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further;
If so, then according to the difference of target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted;
Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
Therefore, different target signal to noise ratio is set for the far and near different terminal in distance base station, by calculating transmission rate factor of influence, closed loop adjustment is carried out to the transmitting power of terminal, makes the balance point that the transmitting power of terminal and upstream rate reach suitable.
Preferably, determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further, if, the then difference of foundation target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted, the second processing unit, specifically for:
If determine, the value of transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Or,
If determine, the value of transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
Preferably, the second processing unit, is further used for:
When determining that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
When determining that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
Preferably, the second processing unit, is further used for:
Determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum equals 0 time, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
Accompanying drawing explanation
Fig. 1 is the general introduction flow chart of control terminal transmitting power in the embodiment of the present invention;
Fig. 2 is the particular flow sheet of control terminal transmitting power in the embodiment of the present invention;
Fig. 3 is the structural representation of control terminal transmitting power in the embodiment of the present invention.
Embodiment
For the transmitting power solving terminal reality in prior art controls result and the unmatched problem of actual channel transmittability, the invention provides a kind of method and device of control terminal transmitting power, in subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence; When determining that PHR is not more than zero by the power headroom PHR of terminal to report, judge whether that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum equals 0 further; Determine that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum when equaling 0, issue the transmitting power that TPC lowers terminal.
Below in conjunction with accompanying drawing, the preferred embodiment of the present invention is described in detail.
Consult shown in Fig. 1, in the embodiment of the present invention, the method for base station control terminal transmitting power is specific as follows:
In the pre-configured stage, base station is respectively each terminal based on the distance between each terminal to this base station and arranges corresponding target signal to noise ratio, and arranges the first threshold value and second threshold value of transmission rate factor of influence.
Concrete, base station is respectively each terminal based on the distance between each terminal to this base station and arranges corresponding target signal to noise ratio, the near point terminal nearer apart from base station arranges higher target signal to noise ratio, higher upstream rate requirement can be met, target signal to noise ratio is maximum is about 16dB, the far point terminal far away apart from base station arranges lower target signal, to meet basic upstream rate requirement.
Step 100: in subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence.
The calculating of transmission rate factor of influence specifically can adopt but be not limited to following method:
In subframe i, base station just passes Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculates compared to subframe i-n, and the changing value of the transmission rate of terminal, wherein, n is setup parameter.
Wherein, transmission rate Rate=M*Eff* (1-Bler), wherein Eff is spectrum efficiency, i.e. each Resource Block (Resource Element, RE) effective bit number is carried, Bler (Block Error Ratio) just passes Block Error Rate for up, and M is amplification factor constant.
Base station just passes Block Error Rate according to spectrum efficiency and the up of statistics, the transmission rate Rate (i) of computing terminal in subframe i, and calculate compared to subframe i-n, the changing value of the transmission rate of terminal, in n subframe, the changing value of the transmission rate of terminal is expressed as Δ Rate=Rate (i)-Rate (i-n).
Because base station is used at the TPC that subframe i issues the terminal transmit power adjusting subframe i+k, therefore base station is calculate the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k in the changing value sum calculating the terminal transmit power in subframe i-n to subframe i, namely the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, wherein, k is setup parameter.
The power control word TPC sum being handed down to terminal in N number of subframe is expressed as Δ TPC=Σ TPC (i-m-k), (m=0 ..., n).
Finally, the terminal transmission rate in subframe i is handed down to the ratio of the TPC sum of terminal as transmission rate factor of influence in the changing value and subframe i-n-k to subframe i-k of the terminal transmission rate of subframe i-n.
Step 110: when base station determines that PHR is not more than zero by the power headroom PHR of terminal to report, judges whether that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum equals 0 further.
Concrete, PHR be 0 or negative time, show that the transmitting power of now terminal has has equaled or exceeded specified terminal transmit power.Further, base station judges whether that the transmission rate factor of influence of terminal is less than the first threshold value, if, then show that the impact of transmitting power on upstream rate of lowering terminal is less, therefore the transmitting power lowering terminal also can not have a significant impact upstream rate, but but can reduce the network interferences between terminal well; Otherwise show that the transmitting power lowering terminal is comparatively large on the impact of upstream rate, higher transmitting power is to keep higher upstream rate.
Step 120: base station determines that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum when equaling 0, issues the transmitting power that TPC lowers terminal.
The transmitting power that TPC lowers terminal is issued when determining to satisfy condition in base station.
In addition, when by the PHR of terminal to report, base station determines that PHR is greater than zero, or, determine that PHR is not more than zero and the transmission rate factor of influence of terminal is not less than the first threshold value and TPC sum when being not equal to 0, base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further, if, then the difference of foundation target signal to noise ratio and actual signal to noise ratio, adjusts the transmitting power of terminal; Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
Concrete, whether first current to the terminal actual signal to noise ratio in base station is less than default target signal to noise ratio judges.
If when base station determines that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
If when base station determines that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
Further, when determining that in base station the current actual signal to noise ratio of terminal is less than default target signal to noise ratio, also need to judge whether TPC sum is 0, if base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum equals 0 time, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
When base station determines that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0, more whether the second threshold value is greater than to the absolute value of transmission rate factor of influence judges.
Determine that in base station the absolute value of transmission rate factor of influence is greater than the second threshold value, the difference of foundation target signal to noise ratio and actual signal to noise ratio, adjusts the transmitting power of terminal;
Specifically be divided into following two kinds of situations:
One, if base station determines that the value of transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Its two, if base station determines that the value of transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
Determine that the absolute value of transmission rate factor of influence is less than or equal to the situation of the second threshold value for base station, base station adjusts according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
The object done like this is the process in order to ensure base station control terminal transmitting power, and the transmitting power of terminal is fluctuated up and down near balance point.
In the above embodiments, base station is by setting different target signal to noise ratio to the judgement of PHR with for the direct distance in terminal and base station, the transmitting power of statistics terminal is to the contribution of actual transfer rate, adjust according to the transmitting power of transmission rate factor of influence to terminal, make the balance point that terminal transmit power and upstream rate reach suitable.Base station all performs above step to determine that the transmitting power of suitable TPC to terminal controls at each frame, and the control method of this base station to terminal transmit power is called closed-loop power control strategy.
Consult shown in Fig. 2, in the embodiment of the present invention, control terminal transmitting power idiographic flow is as follows:
In the present embodiment, in the pre-configured stage, the terminal that base station is nearly middle far point according to the rate requirement of different terminals arranges different target signal to noise ratio, and arranges the first threshold value and second threshold value of transmission rate factor of influence.
Step 201: base station based on the transmission rate of terminal changing value Δ Rate and be at the appointed time handed down to the power control word TPC sum Δ TPC of terminal in section, calculate transmission rate factor of influence Δ Rate/ Δ TPC.
Wherein, Rate=M*Eff* (1-Bler), wherein Eff is spectrum efficiency, and namely every RE carries effective bit number, and Bler uply just passes Block Error Rate, and M is amplification factor constant.
Base station just passes Block Error Rate according to spectrum efficiency and the up of statistics, the transmission rate Rate (i) of computing terminal in subframe i, and calculate compared to subframe i-n, the changing value of the transmission rate of terminal, in N number of subframe, the changing value of the transmission rate of terminal is expressed as Δ Rate=Rate (i)-Rate (i-N).
The power control word TPC sum being handed down to terminal in N number of subframe is expressed as Δ TPC=Σ TPC (i-n-K), (n=0 ..., N).
Step 202: base station is judged by the power headroom PHR of terminal to report, and PHR is not more than zero if determine, and the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum when equaling 0, performs step 203; Otherwise, perform step 204;
Step 203: base station determines that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum when equaling 0, issues the transmitting power that TPC lowers terminal.
Step 204: base station judges whether the target signal to noise ratio preset is greater than the current actual signal to noise ratio of terminal, if Δ SINR=0, then performs step 205; If Δ SINR<0, then perform step 206; If Δ SINR>0, then perform step 207.
Wherein, Δ SINR=TargetSINR-RealSINR, Δ SINR represents signal to noise ratio difference, and TargetSINR represents the target signal to noise ratio that terminal is preset, and RealSINR represents the actual signal to noise ratio that terminal is current.
Step 205: when Δ SINR=0 is determined in base station, TPC=0, the transmitting power maintaining terminal is constant.
Step 206: when Δ SINR<0 is determined in base station, lowers the transmitting power of terminal, TPC=Δ SINR.
Such as, Δ SINR=-0.5, then TPC=-1dB.
Step 207: when Δ SINR>0 is determined in base station, judges whether Δ TPC equals 0 further, if so, performs step 210; Otherwise, perform step 208.
Step 208: base station judges the value of Δ Rate/ Δ TPC and the relation of the second threshold T HR2, if Δ Rate/ Δ TPC<-THR2, performs step 209; If Δ Rate/ Δ TPC>THR2, perform step 210; If the absolute value of Δ Rate/ Δ TPC is less than or equal to THR2, perform step 211.
Step 209: Δ Rate/ Δ TPC<-THR2 is determined in base station, lowers the transmitting power of terminal, TPC=-Δ SINR.
Step 210: the transmitting power of terminal is raised in base station, TPC=Δ SINR.
Step 211: base station determines that the absolute value of Δ Rate/ Δ TPC is less than or equal to THR1, TPC=-Last TPC, namely this sends the TPC contrary with last time, and transmitting power is fluctuated up and down near balance point.
Consult shown in Fig. 3, the device of control terminal transmitting power, is formed by with lower unit:
Computing unit 30, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence;
First processing unit 31, during for determining that PHR is not more than zero by the power headroom PHR of terminal to report, judges whether that the transmission rate factor of influence of terminal is less than the first threshold value or TPC sum equals 0 further;
Transmitting element 32, for determine the transmission rate factor of influence of terminal be less than the first threshold value or TPC sum equal 0 time, issue the transmitting power that TPC lowers terminal.
Preferably, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the TPC sum of terminal in section, when calculating transmission rate factor of influence, computing unit 30 for:
In subframe i, just pass Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculate compared to subframe i-n, the changing value of the transmission rate of terminal, wherein, n is setup parameter;
Calculate the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k, wherein, the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, and k is setup parameter;
And using the ratio of changing value and TPC sum as transmission rate factor of influence.
Preferably, determine that PHR is greater than zero by the PHR of terminal to report, or, determine that PHR is not more than zero and the transmission rate factor of influence of terminal is not less than the first threshold value and TPC sum when being not equal to 0, comprise further:
Second processing unit 33, for determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further;
If so, then according to the difference of target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted;
Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
Preferably, determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum is not 0 time, judge whether the absolute value of transmission rate factor of influence is greater than the second threshold value further, if, the then difference of foundation target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted, the second processing unit 33, specifically for:
If determine, the value of transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Or,
If determine, the value of transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
Preferably, the second processing unit 33, is further used for:
When determining that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
When determining that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
Preferably, the second processing unit 33, is further used for:
Determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and TPC sum equals 0 time, then the difference according to target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
To sum up, adopt method of the present invention, in order to ensure that network interferences lower between terminal can maintain higher upstream rate again, base station needs the terminal higher to transmitting power to carry out power adjustment, but also make upstream rate obviously reduce while descending adjusting power can cause reducing interference uniformly, therefore, adopt in the present invention, base station carries out power adjustment by the PHR of terminal to report to the terminal satisfied condition, and reduces between terminal and maintains higher upstream rate while network interferences.
In addition, different target signal to noise ratio is set for the far and near different terminal in distance base station, by calculating transmission rate factor of influence, closed loop adjustment is carried out to the transmitting power of terminal, makes the balance point that the transmitting power of terminal and upstream rate reach suitable.
Those skilled in the art should understand, embodiments of the invention can be provided as method, system or computer program.Therefore, the present invention can adopt the form of complete hardware embodiment, completely software implementation or the embodiment in conjunction with software and hardware aspect.And the present invention can adopt in one or more form wherein including the upper computer program implemented of computer-usable storage medium (including but not limited to magnetic disc store, CD-ROM, optical memory etc.) of computer usable program code.
The present invention describes with reference to according to the flow chart of the method for the embodiment of the present invention, equipment (system) and computer program and/or block diagram.Should understand can by the combination of the flow process in each flow process in computer program instructions realization flow figure and/or block diagram and/or square frame and flow chart and/or block diagram and/or square frame.These computer program instructions can being provided to the processor of all-purpose computer, special-purpose computer, Embedded Processor or other programmable data processing device to produce a machine, making the instruction performed by the processor of computer or other programmable data processing device produce device for realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be stored in can in the computer-readable memory that works in a specific way of vectoring computer or other programmable data processing device, the instruction making to be stored in this computer-readable memory produces the manufacture comprising command device, and this command device realizes the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, make on computer or other programmable devices, to perform sequence of operations step to produce computer implemented process, thus the instruction performed on computer or other programmable devices is provided for the step realizing the function of specifying in flow chart flow process or multiple flow process and/or block diagram square frame or multiple square frame.
Although describe the preferred embodiments of the present invention, those skilled in the art once obtain the basic creative concept of cicada, then can make other change and amendment to these embodiments.So claims are intended to be interpreted as comprising preferred embodiment and falling into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification to the embodiment of the present invention and not depart from the spirit and scope of the embodiment of the present invention.Like this, if these amendments of the embodiment of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (12)
1. a method for control terminal transmitting power, is characterized in that, comprising:
In subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence;
When base station determines that described PHR is not more than zero by the power headroom PHR of terminal to report, judge whether that the transmission rate factor of influence of described terminal is less than the first threshold value or described TPC sum equals 0 further;
Base station determines that the transmission rate factor of influence of described terminal is less than the first threshold value or described TPC sum when equaling 0, issues the transmitting power that TPC lowers terminal.
2. the method for claim 1, is characterized in that, in subframe i, base station based on the transmission rate of terminal changing value and be at the appointed time handed down to the TPC sum of terminal in section, calculate transmission rate factor of influence, comprising:
In subframe i, base station just passes Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculates compared to subframe i-n, the changing value of the transmission rate of terminal, and wherein, n is setup parameter;
Base station calculates the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k, and wherein, the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, and k is setup parameter;
Using the ratio of described changing value and described TPC sum as transmission rate factor of influence.
3. method as claimed in claim 1 or 2, it is characterized in that, by the PHR of terminal to report, base station determines that described PHR is greater than zero, or, determine that described PHR is not more than zero and the transmission rate factor of influence of described terminal is not less than described first threshold value and described TPC sum when being not equal to 0, comprise further:
Base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum is not 0 time, judge whether the absolute value of described transmission rate factor of influence is greater than the second threshold value further;
If so, then according to the difference of described target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted;
Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
4. method as claimed in claim 3, it is characterized in that, base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum is not 0 time, judge whether the absolute value of described transmission rate factor of influence is greater than the second threshold value further, if, then according to the difference of described target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted, specifically comprises:
If base station determines that the value of described transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Or,
If base station determines that the value of described transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
5. method as claimed in claim 3, is characterized in that, comprise further:
When base station determines that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
When base station determines that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
6. method as claimed in claim 3, is characterized in that, comprise further:
Base station determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum equals 0 time, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
7. a device for control terminal transmitting power, is characterized in that, comprising:
Computing unit, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the power control word TPC sum of terminal in section, calculate transmission rate factor of influence;
First processing unit, during for determining that described PHR is not more than zero by the power headroom PHR of terminal to report, judges whether that the transmission rate factor of influence of described terminal is less than the first threshold value or described TPC sum equals 0 further;
Transmitting element, for determine the transmission rate factor of influence of described terminal be less than the first threshold value or described TPC sum equal 0 time, issue the transmitting power that TPC lowers terminal.
8. device as claimed in claim 7, is characterized in that, in subframe i, based on the transmission rate of terminal changing value and be at the appointed time handed down to the TPC sum of terminal in section, during calculating transmission rate factor of influence, described computing unit is used for:
In subframe i, just pass Block Error Rate, the transmission rate of computing terminal in subframe i according to spectrum efficiency and the up of statistics, and calculate compared to subframe i-n, the changing value of the transmission rate of terminal, wherein, n is setup parameter;
Calculate the TPC sum being handed down to terminal in subframe i-n-k to subframe i-k, wherein, the TPC issued in subframe i-n-k to subframe i-k is respectively used to adjustment terminal at subframe i-n to the transmitting power in subframe i, and k is setup parameter;
And using the ratio of described changing value and described TPC sum as transmission rate factor of influence.
9. device as claimed in claim 7 or 8, it is characterized in that, determine that described PHR is greater than zero by the PHR of terminal to report, or, determine that described PHR is not more than zero and the transmission rate factor of influence of described terminal is not less than described first threshold value and described TPC sum when being not equal to 0, comprise further:
Second processing unit, for determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum is not 0 time, judge whether the absolute value of described transmission rate factor of influence is greater than the second threshold value further;
If so, then according to the difference of described target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted;
Otherwise, adjust according to the transmitting power of TPC to terminal being handed down to terminal in subframe i-1.
10. device as claimed in claim 9, it is characterized in that, determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum is not 0 time, judge whether the absolute value of described transmission rate factor of influence is greater than the second threshold value further, if so, then according to the difference of described target signal to noise ratio and actual signal to noise ratio, the transmitting power of terminal is adjusted, described second processing unit, specifically for:
If determine, the value of described transmission rate factor of influence is positive number and is greater than the second threshold value, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal;
Or,
If determine, the value of described transmission rate factor of influence is negative and is less than the second negative threshold value, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal.
11. devices as claimed in claim 9, it is characterized in that, described second processing unit, is further used for:
When determining that the current actual signal to noise ratio of terminal is greater than default target signal to noise ratio, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC lowers terminal;
Or,
When determining that the current actual signal to noise ratio of terminal equals default target signal to noise ratio, the transmitting power maintaining terminal is constant.
12. devices as claimed in claim 9, it is characterized in that, described second processing unit, is further used for:
Determine that the current actual signal to noise ratio of terminal is less than default target signal to noise ratio and described TPC sum equals 0 time, then the difference according to described target signal to noise ratio and actual signal to noise ratio issues the transmitting power that TPC raises terminal.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121225A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Communication method, access network device and terminal |
| CN109803363A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Communication means, communication device and system |
| CN110049542A (en) * | 2019-06-10 | 2019-07-23 | 深圳大学 | The data transmission method and system of uplink based on mimo system |
| CN111698716A (en) * | 2019-03-14 | 2020-09-22 | 中国移动通信有限公司研究院 | Terminal energy efficiency reporting method, uplink transmission power control method and device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655472A (en) * | 2004-02-13 | 2005-08-17 | 北京三星通信技术研究有限公司 | Method and apparatus for controlling transmission speed in transmitting power dispatching on a terminal |
| US20110176593A1 (en) * | 2010-01-20 | 2011-07-21 | Hultell Johan | Methods and devices for uplink transmit diversity |
| CN102404836A (en) * | 2010-09-16 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for acquiring transmission power control (TPC) command |
| CN103155659A (en) * | 2010-08-13 | 2013-06-12 | 捷讯研究有限公司 | Total remaining power estimation in carrier aggregation |
| CN103546955A (en) * | 2012-07-12 | 2014-01-29 | 华为技术有限公司 | Power control method, UE (user equipment) and network equipment |
-
2014
- 2014-12-24 CN CN201410818589.6A patent/CN104540207B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1655472A (en) * | 2004-02-13 | 2005-08-17 | 北京三星通信技术研究有限公司 | Method and apparatus for controlling transmission speed in transmitting power dispatching on a terminal |
| US20110176593A1 (en) * | 2010-01-20 | 2011-07-21 | Hultell Johan | Methods and devices for uplink transmit diversity |
| CN103155659A (en) * | 2010-08-13 | 2013-06-12 | 捷讯研究有限公司 | Total remaining power estimation in carrier aggregation |
| CN102404836A (en) * | 2010-09-16 | 2012-04-04 | 中兴通讯股份有限公司 | Method and device for acquiring transmission power control (TPC) command |
| CN103546955A (en) * | 2012-07-12 | 2014-01-29 | 华为技术有限公司 | Power control method, UE (user equipment) and network equipment |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018121225A1 (en) * | 2016-12-30 | 2018-07-05 | 华为技术有限公司 | Communication method, access network device and terminal |
| CN109803363A (en) * | 2017-11-17 | 2019-05-24 | 华为技术有限公司 | Communication means, communication device and system |
| US11516754B2 (en) | 2017-11-17 | 2022-11-29 | Huawei Technologies Co., Ltd. | Communication method, communications apparatus, and communications system |
| CN111698716A (en) * | 2019-03-14 | 2020-09-22 | 中国移动通信有限公司研究院 | Terminal energy efficiency reporting method, uplink transmission power control method and device |
| CN111698716B (en) * | 2019-03-14 | 2023-05-05 | 中国移动通信有限公司研究院 | Terminal energy efficiency reporting method, uplink transmitting power control method and device |
| CN110049542A (en) * | 2019-06-10 | 2019-07-23 | 深圳大学 | The data transmission method and system of uplink based on mimo system |
| CN110049542B (en) * | 2019-06-10 | 2020-01-10 | 深圳大学 | Uplink data transmission method and system based on MIMO system |
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|---|---|
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