CN101583181B - Method and device for controlling transmission power of mobile station - Google Patents
Method and device for controlling transmission power of mobile station Download PDFInfo
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- CN101583181B CN101583181B CN2008101064683A CN200810106468A CN101583181B CN 101583181 B CN101583181 B CN 101583181B CN 2008101064683 A CN2008101064683 A CN 2008101064683A CN 200810106468 A CN200810106468 A CN 200810106468A CN 101583181 B CN101583181 B CN 101583181B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [TPC]
- H04W52/30—Transmission power control [TPC] using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/346—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading distributing total power among users or channels
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Abstract
The invention discloses a method and a device for controlling the transmission power of mobile stations, belonging to the communication technology field. The method for controlling the transmission power of mobile stations comprises the following steps: acquiring signals of two mobile stations, and adjusting the transmission power of the two mobile stations so that the difference of the intensity of the signals of the two mobile stations meets the first preset requirement or the ratio of the intensity of the signals of the two mobile stations meets the second preset requirement. The device forcontrolling the transmission power of mobile stations comprises an acquiring module and a cooperatively controlling module. In the invention, the power of the two mobile stations is cooperatively con trolled, thus the overlarge signal interference is effectively inhibited, the demodulation performance and the multiplex effect of the multiplex mobile station are improved, and the business quality is guaranteed when the MUROS technology is used for improving the phonetic capacity.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for controlling transmit power of a mobile station.
Background
The traditional voice adopts a distribution mode that one time Slot is used for one User, and more paths of voice need to be carried on the same resource with the continuous increase of the Number of users, so that a technology of multiplexing a plurality of users on one time Slot and an ARFCN (Absolute radio frequency Channel Number, Absolute frequency point Number), such as a MUROS (Multi-User reuse one Slot), appears, and the capacity can be remarkably increased on a fixed carrier frequency and a fixed frequency spectrum.
Referring to fig. 1, MUROS multiplexes two users MS (Mobile Station) 1 and MS2 over one slot, and MUROS provides two subchannels, each MS occupying one subchannel, the subchannels being distinguished by orthogonal or near-orthogonal training sequences. In the downlink direction, a BTS (Base Station Subsystem) transmits two GMSK (gaussian minimum Shift-frequency Keying) signals to generate a QPSK (Quadrature phase Shift Keying) like signal, and an MS cancels a signal that does not belong to itself as an interference signal through a mutually orthogonal training sequence and an enhanced interference cancellation technique, thereby solving a signal that belongs to itself. In the uplink direction, two multiplexed MSs use GMSK modulation to transmit signals in the same timeslot, and the BTS demodulates the two multiplexed signals in a SIC (Successive interference cancellation) or JD (Joint Detection) manner, and distinguishes two users through different training sequences.
In order to improve the spectrum efficiency and more effectively utilize hardware and spectrum resources, a power control algorithm is usually adopted to control the transmit power (i.e., uplink power) of the MS according to a certain principle. The principle is as follows: if the receiving level or quality of the BTS is higher than a desired value, the transmitting power of the MS is appropriately reduced; if the receiving level or receiving quality of the BTS is lower than the expected value, the transmitting power of the MS is properly increased; meanwhile, the factors of receiving level and receiving quality are comprehensively considered, so that the accuracy and the effectiveness of power control are improved. The procedure for controlling the transmit power of the MS is as follows: after receiving a certain number of uplink measurement reports from the BTS, the BSC (Base Station Controller) obtains the reception level and reception quality of the actual uplink by processing methods such as interpolation and filtering, compares the reception level and reception quality with the reception level and reception quality of the expected uplink, determines whether the transmission power of the MS needs to be adjusted according to the comparison result, and if so, calculates the power level to be adjusted by a power control algorithm, and sends a power adjustment command to the MS. For example, an upper threshold and a lower threshold of the reception level and an upper threshold and a lower threshold of the reception quality are set, respectively, and counters P and N are set. And when N of the continuously received P measurement reports exceed the threshold, performing power adjustment, if the number of the continuously received P measurement reports is higher than the upper limit threshold, adjusting the power downwards, and if the number of the continuously received P measurement reports is lower than the lower limit threshold, adjusting the power upwards.
After analyzing the prior art, the inventors found that: the individual power control of the multiplexed end users may result in excessive interference between the multiplexed signals, degraded reception and demodulation performance, or even no demodulation.
Disclosure of Invention
In order to more effectively control the transmission power of the mobile station, embodiments of the present invention provide a method and an apparatus for controlling the transmission power of the mobile station. The technical scheme is as follows:
a method of controlling transmit power of a mobile station, the method comprising:
acquiring signals of two mobile stations;
adjusting the transmitting power of the two mobile stations to enable the difference value of the signal intensity of the two mobile stations to meet a first preset condition; or,
and adjusting the transmitting power of the two mobile stations to ensure that the ratio of the signal intensity of the two mobile stations meets a second preset condition.
An apparatus for controlling transmission power of a mobile station, the apparatus comprising:
an acquisition module, configured to acquire signals of two mobile stations;
a joint control module, configured to adjust the transmission powers of the two mobile stations, so that a difference between the signal strengths of the two mobile stations obtained by the obtaining module meets a first preset condition; or adjusting the transmitting power of the two mobile stations to enable the ratio of the signal strength of the two mobile stations to meet a second preset condition.
The embodiment of the invention jointly controls the power of the two MSs according to the difference value or the ratio of the signal strength of the two MSs, effectively inhibits the possibility of overlarge interference between signals, and ensures the business quality while improving the voice capacity by the MUROS technology.
Drawings
FIG. 1 is a diagram of a MUROS multiplexing two users on the time slot in the prior art;
fig. 2 is a flowchart of a method for controlling the transmission power of a mobile station according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a scenario of multiplexing two MSs according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for controlling the transmission power of a mobile station according to a difference value according to an embodiment of the present invention;
fig. 5 is a flowchart of a method for controlling the transmission power of a mobile station according to a ratio according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of an apparatus for controlling the transmit power of a mobile station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an apparatus for controlling transmit power of a mobile station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
An embodiment of the present invention provides a method for controlling transmit power of a mobile station, which is described in fig. 2 and specifically includes:
201: acquiring signals of two mobile stations;
202: adjusting the transmitting power of the two mobile stations to ensure that the difference value of the signal intensity of the two mobile stations meets a first preset condition; or adjusting the transmitting power of the two mobile stations to make the ratio of the signal intensity of the two mobile stations meet a second preset condition.
The technical scheme in the embodiment of the invention can be suitable for the MS multiplexing scenes, including the scenes of two MS multiplexing and a plurality of MS multiplexing. When a plurality of MSs are multiplexed, the same means as when two MSs are multiplexed can be employed for any two of them for power control. Referring to fig. 3, the embodiment of the present invention specifically uses two MS multiplexing as an example, where the two MS multiplexing are MS1 and MS2, respectively, and the ARFCN is 160, two signals are issued by the BTS in time slot 3, and the signals of MS1 and MS2 are distinguished by using two Training sequences with TSC (Training Sequence Code) of 0 and TSC of 5, respectively, as shown by a solid line in the figure, the MS treats the signal that does not belong to itself as interference, as shown by a dashed line in the figure. The BTS generates a measurement report and sends the measurement report to the BSC after receiving the signals from the MS1 and the MS2, and the BSC controls the transmitting power of the MS1 and the MS2 according to the preset intensity difference range and/or intensity ratio range of the received signals after receiving the measurement report.
Referring to fig. 4, a method for controlling transmit power of a mobile station according to an embodiment of the present invention specifically includes:
401: the BSC presets a signal strength upper limit, a signal strength lower limit, a signal quality upper limit, a signal quality lower limit, a signal strength difference upper limit, and a signal strength difference lower limit, and receives a measurement report from the BTS, where the measurement report includes information such as strength and quality of a signal from the multiplexing MS, and the measurement report may specifically include: the BTS receives the strength a1 and the quality B1 of the first signal of MS1 and the BTS receives the strength a2 and the quality B2 of the second signal of MS 2.
Wherein, the upper limit value can be set to different values according to requirements. For example, lower and upper signal strength limits of (-60dbm, -80dbm), lower and upper signal quality limits of (0 level, 2 levels), lower and upper signal strength difference limits of (5dB, 10dB), etc., are set according to simulation results, wherein one level of signal quality may be set to a different value, such as 4dB, etc., as desired.
Wherein the strength of the received signal is usually represented as a reception level value.
The BSC may also perform preprocessing after receiving the measurement report: interpolation is performed to offset the influence of the missing part of the measurement report, filtering is performed to offset the influence of accidental instability of the measurement report, and the like, so that the accuracy and the authenticity of the measurement report are ensured, and power control is better performed.
402: the BSC judges whether the A1 is between the upper signal strength limit and the lower signal strength limit, and if so, the transmitting power of the MS1 is not adjusted; if a1 is above the upper signal strength limit, reducing the transmit power of MS1, and if a1 is below the lower signal strength limit, increasing the transmit power of MS 1; and determining whether B1 is between the upper signal quality limit and the lower signal quality limit, and if so, not adjusting the transmit power of the MS 1; if B1 is above the upper signal quality limit, the transmit power of MS1 is decreased, and if B1 is below the lower signal quality limit, the transmit power of MS1 is increased. The power adjustment of the MS1 is performed according to the signal strength and the signal quality, which is not sequential, or may be performed simultaneously until the transmit power of the MS1 meets the requirements of the signal strength and the signal quality at the same time.
403: the BSC judges whether the A2 is between the upper signal strength limit and the lower signal strength limit, and if so, the transmitting power of the MS2 is not adjusted; if a2 is above the upper signal strength limit, reducing the transmit power of MS2, and if a2 is below the lower signal strength limit, increasing the transmit power of MS 2; and determining whether B2 is between the upper signal quality limit and the lower signal quality limit, and if so, not adjusting the transmit power of the MS 2; if B2 is above the upper signal quality limit, the transmit power of MS2 is decreased, and if B2 is below the lower signal quality limit, the transmit power of MS2 is increased. The power adjustment of the MS2 is performed according to the signal strength and the signal quality, which is not sequential, or may be performed simultaneously until the transmit power of the MS2 meets the requirements of the signal strength and the signal quality at the same time.
Specifically, when the transmission power is increased, the increased power value may be set to: (upper signal strength limit + lower signal strength limit)/2-strength of received signal; in reducing the transmission power, the reduced power value may be set to: received signal strength- (signal strength upper limit + signal strength lower limit)/2.
404: the BSC calculates the difference in received signal strength from the two mobile stations, and subtracts the difference a1-a2 assuming a1 > a 2.
405: judging whether the difference A1-A2 is between a preset signal strength difference upper limit and a preset signal strength difference lower limit according to the calculated difference and the difference range, if so, not adjusting the transmitting power of the two MSs after the first adjustment again by the BSC, and ending the process; if the difference A1-A2 is above the signal strength difference ceiling, 406 is performed; if the difference A1-A2 is below the signal strength difference lower bound, 407 is performed.
406: and adjusting the transmitting power of the two MSs after the first power adjustment according to the direction of reducing the difference, and specifically, reducing the transmitting power of the MS1 after the first power adjustment under the condition that neither B1 nor B2 is less than the lower limit of the signal quality.
Further, after reducing the transmit power of the MS1, the method may further include:
if A1 reaches the lower signal strength limit and the difference A1-A2 is still higher than the upper signal strength difference limit, the transmit power of the MS2 after the first adjustment is increased until the difference A1-A2 is not higher than the upper signal strength difference limit or A2 reaches the upper signal strength limit or B2 reaches the upper signal quality limit, and then the process ends.
407: and adjusting the transmitting power of the two MSs after the first adjustment according to the direction of increasing the difference, and specifically, reducing the transmitting power of the MS2 after the first adjustment under the condition that neither B1 nor B2 is less than the lower limit of the signal quality.
Further, after reducing the transmit power of the MS2, the method may further include:
if A2 reaches the lower signal strength limit and the difference A1-A2 is still lower than the lower signal strength difference limit, the transmitting power of the MS1 after the first adjustment is increased until the difference A1-A2 is not lower than the lower signal strength difference limit or A1 reaches the upper signal strength limit or B1 reaches the upper signal quality limit, and then the process is ended.
In this embodiment, when the calculated difference does not satisfy the preset range, the transmission power of one MS is preferably decreased, and then the transmission power of another MS is considered to be increased.
In the process of controlling the transmitting power of the two mobile stations, the process comprises a first process of independent control and a second process of combined control, and if the increased or decreased transmitting power value exceeds a preset maximum step length, the transmitting power is increased or decreased according to the maximum step length; if the preset maximum step size is not exceeded, the transmit power of the mobile station is increased or decreased according to the actually calculated value. For example, the preset maximum step size is 2dB, if 1dB needs to be increased or decreased, the adjustment is performed according to the value 1dB, if 3dB needs to be increased or decreased, the value exceeds the maximum step size, the adjustment is performed according to the maximum step size 2dB, the adjustment does not meet the condition, the adjustment is performed again, and the amplitude of each adjustment cannot exceed the maximum step size. In addition, the maximum step length when power adjustment is performed according to the signal strength, the maximum step length when power adjustment is performed according to the signal quality, and the maximum step length when power adjustment is performed according to the signal strength difference can be set respectively, and the three maximum step lengths can be the same or different.
In this embodiment, the power control is performed on the multiplexed mobile station according to the difference between the signal strengths of the mobile stations multiplexed by the base station, so that the possibility of excessive interference between the multiplexed signals is effectively suppressed, the demodulation performance is improved, the multiplexing effect is improved, and the MUROS technology ensures the service quality while improving the voice capacity. The power control is carried out on the multiplexed mobile station independently and then the combined control is carried out, so that the control accuracy can be further improved, and the system performance is greatly improved. The transmission power of one mobile station is reduced preferentially when the power is adjusted, the resources of the MS are saved when the signal quality is ensured to be within a reasonable range, and the method is beneficial to reducing the power consumption of the MS, increasing the standby time of the MS and the like.
In the method shown in fig. 4, the BSC is used to determine the difference between the signal strengths of the two MSs, which may be replaced by other methods, such as calculating the ratio, as described in detail below.
Referring to fig. 5, the method for controlling the transmit power of the mobile station provided in the embodiment of the present invention may further include:
501, the difference between 401 and 401 is that the BSC does not preset an upper signal strength difference and a lower signal strength difference, but preset an upper signal strength ratio and a lower signal strength ratio, and the rest are the same as 401; 502 is the same as 402, 503 is the same as 403, and the description is omitted here.
504: the BSC calculates the ratio of the received signal strengths from the two mobile stations, assuming A1 < A2, the ratio is A1/A2.
505: judging whether the ratio A1/A2 is between a preset signal strength ratio upper limit and a preset signal strength ratio lower limit according to the calculated ratio and a preset ratio range, if so, not adjusting the transmitting power of the two MSs after the first adjustment again by the BSC, and ending the process; if the ratio A1/A2 is above the signal strength ratio ceiling, then 506 is performed; if the ratio A1/A2 is below the signal strength ratio lower limit, 507 is executed.
506: and adjusting the transmitting power of the two MSs after the first adjustment according to the direction of reducing the ratio, and specifically, reducing the transmitting power of the MS1 after the first adjustment under the condition that neither B1 nor B2 is less than the lower limit of the signal quality.
Further, after reducing the transmit power of the MS1, the method may further include:
if A1 reaches the lower signal strength limit and the ratio A1/A2 is still higher than the upper signal strength ratio limit, the transmit power of the MS2 after the first adjustment is increased until the ratio A1/A2 is not higher than the upper signal strength ratio limit or A2 reaches the upper signal strength limit or B2 reaches the upper signal quality limit, and then the process is ended.
507: and adjusting the transmitting power of the two MSs after the first adjustment according to the direction of increasing the ratio, and specifically, reducing the transmitting power of the MS2 after the first adjustment under the condition that neither B1 nor B2 is less than the lower limit of the signal quality.
Further, after reducing the transmit power of the MS2, the method may further include:
if A2 reaches the lower signal strength limit and the ratio A1/A2 is still lower than the lower signal strength ratio limit, the transmitting power of the MS1 after the first adjustment is increased until the ratio A1/A2 is not lower than the lower signal strength ratio limit or A1 reaches the upper signal strength limit or B1 reaches the upper signal quality limit, and then the process is ended.
In this embodiment, when the calculated ratio does not satisfy the preset range, the transmission power of one MS is preferably decreased, and then the transmission power of another MS is considered to be increased.
In the above process of controlling the transmission power of two mobile stations, including the first individual control and the second joint control, if the increased or decreased transmission power value exceeds the preset maximum step size, the transmission power is increased or decreased according to the maximum step size. In addition, the maximum step length when power adjustment is performed according to signal strength, the maximum step length when power adjustment is performed according to signal quality, and the maximum step length when power adjustment is performed according to a signal strength ratio can be set respectively, and the three maximum step lengths can be the same or different.
In this embodiment, the power control is performed on the multiplexed mobile station jointly according to the ratio of the signal strength of the mobile station multiplexed by the base station, so that the possibility of excessive interference between the multiplexed signals is effectively suppressed, the demodulation performance is improved, the multiplexing effect is improved, and the MUROS technology ensures the service quality while improving the voice capacity. The power control is carried out on the multiplexed mobile station independently and then the combined control is carried out, so that the control accuracy can be further improved, and the system performance is greatly improved. The transmission power of one mobile station is reduced preferentially when the power is adjusted, the resources of the MS are saved when the signal quality is ensured to be within a reasonable range, and the method is beneficial to reducing the power consumption of the MS, increasing the standby time of the MS and the like.
Referring to fig. 6, an embodiment of the present invention further provides a device for controlling transmit power of a mobile station, which specifically includes:
an obtaining module 601, configured to obtain signals of two mobile stations;
a joint control module 602, configured to adjust the transmission powers of the two mobile stations, so that the difference between the signal strengths of the two mobile stations obtained by the obtaining module 601 meets a first preset condition; or adjusting the transmitting power of the two mobile stations to make the ratio of the signal intensity of the two mobile stations meet a second preset condition.
Further, the above apparatus further comprises:
a signal strength control module 603, configured to determine whether a signal strength of any one of the two mobile stations is between a preset signal strength upper limit and a preset signal strength lower limit, decrease the transmission power of the mobile station if the signal strength of the mobile station is higher than the preset signal strength upper limit, and increase the transmission power of the mobile station if the signal strength of the mobile station is lower than the preset signal strength lower limit;
and or (b) a,
a signal quality control module 604, configured to determine whether a signal quality of any one of the two mobile stations is between a preset signal quality upper limit and a preset signal quality lower limit, decrease the transmit power of the mobile station if the signal quality of the mobile station is higher than the preset signal quality upper limit, and increase the transmit power of the mobile station if the signal quality of the mobile station is lower than the preset signal quality lower limit. Fig. 7 shows a case where both the signal strength control module 603 and the signal quality control module 604 are included.
When the first preset condition includes: when the preset upper limit of the signal strength difference value and the preset lower limit of the signal strength difference value are both set, the joint control module 602 in the apparatus shown in fig. 6 specifically includes:
a first difference processing unit, configured to adjust the transmission power of the two mobile stations according to a direction in which the difference between the signal strengths of the two mobile stations is decreased when the difference between the signal strengths of the two mobile stations is higher than a preset upper limit of the difference between the signal strengths;
a second difference processing unit, configured to, when the difference between the signal strengths of the two mobile stations is lower than a preset lower limit of the signal strength difference, adjust the transmit powers of the two mobile stations according to a direction in which the difference between the signal strengths of the two mobile stations is increased.
When the joint control module 602 includes a first difference processing unit and a second difference processing unit, and the difference between the signal strengths of the two mobile stations is a result of subtracting the signal strength of the second mobile station from the signal strength of the first mobile station of the two mobile stations, further, the first difference processing unit is specifically configured to reduce the transmission power of the first mobile station under a condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than a preset signal quality lower limit when the difference between the signal strengths of the two mobile stations is higher than a preset signal strength difference upper limit;
and the second difference processing unit is specifically configured to, when the difference between the signal strengths of the two mobile stations is lower than a preset lower limit of the signal strength difference, reduce the transmission power of the second mobile station under a condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than the preset lower limit of the signal quality.
When the first difference processing unit decreases the transmission power of the first mobile station, the joint control module 602 further includes:
a third difference processing unit, configured to, after the first difference processing unit reduces the transmit power of the first mobile station, increase the transmit power of the second mobile station if the signal strength of the first mobile station reaches a preset signal strength lower limit and the difference between the signal strengths of the two mobile stations is still higher than a preset signal strength difference upper limit until the signal strength difference between the two mobile stations is not higher than the preset signal strength difference upper limit or the signal strength of the second mobile station reaches the preset signal strength upper limit or the signal quality of the second mobile station reaches the preset signal quality upper limit.
When the second difference processing unit decreases the transmission power of the second mobile station, the joint control module 602 further includes:
and a fourth difference processing unit, configured to, after the second difference processing unit reduces the transmission power of the second mobile station, increase the transmission power of the first mobile station if the signal strength of the second mobile station reaches a preset signal strength lower limit and the signal strength difference between the two mobile stations is still lower than the preset signal strength lower limit until the signal strength difference between the two mobile stations is not lower than the preset signal strength lower limit or the signal strength of the first mobile station reaches a preset signal strength upper limit or the signal quality of the first mobile station reaches a preset signal quality upper limit.
In addition, in the apparatus shown in fig. 6, when the second preset condition includes a preset signal strength ratio upper limit and a preset signal strength ratio lower limit, the joint control module 602 specifically includes:
a first ratio processing unit, configured to adjust the transmission power of the two mobile stations according to a direction of decreasing the ratio of the signal strengths of the two mobile stations when the ratio of the signal strengths of the two mobile stations is higher than a preset upper limit of the signal strength ratio;
and a second ratio processing unit, configured to adjust the transmission power of the two mobile stations according to a direction of increasing the ratio of the signal strengths of the two mobile stations when the ratio of the signal strengths of the two mobile stations is lower than a preset lower limit of the signal strength ratio.
When the joint control module 602 includes a first ratio processing unit and a second ratio processing unit, and the ratio of the signal strengths of the two mobile stations is a result of dividing the signal strength of a first mobile station of the two mobile stations by the signal strength of a second mobile station, further, the first ratio processing unit is specifically configured to reduce the transmission power of the first mobile station under a condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than a preset signal quality lower limit when the ratio of the signal strengths of the two mobile stations is higher than a preset signal strength ratio upper limit;
and the second ratio processing unit is specifically configured to reduce the transmission power of the second mobile station under a condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than a preset signal quality lower limit when the ratio of the signal strengths of the two mobile stations is lower than the preset signal strength ratio lower limit.
When the first ratio processing unit decreases the transmission power of the first mobile station, the joint control module 602 further includes:
and a third ratio processing unit, configured to, after the first ratio processing unit reduces the transmission power of the first mobile station, increase the transmission power of the second mobile station if the signal strength of the first mobile station reaches a preset signal strength lower limit and the ratio of the signal strengths of the two mobile stations is still higher than a preset signal strength ratio upper limit until the ratio of the signal strengths of the two mobile stations is not higher than the preset signal strength ratio upper limit or the signal strength of the second mobile station reaches the preset signal strength upper limit or the signal quality of the second mobile station reaches the preset signal quality upper limit.
When the second ratio processing unit decreases the transmission power of the second mobile station, the joint control module 602 further includes:
and a fourth ratio processing unit, configured to, after the second ratio processing unit reduces the transmission power of the second mobile station, increase the transmission power of the first mobile station if the signal strength of the second mobile station reaches a preset signal strength lower limit and the ratio of the signal strengths of the two mobile stations is still lower than the preset signal strength ratio lower limit until the ratio of the signal strengths of the two mobile stations is not lower than the preset signal strength ratio lower limit or the signal strength of the first mobile station reaches a preset signal strength upper limit or the signal quality of the first mobile station reaches a preset signal quality upper limit.
The apparatus in this embodiment may be applied to a BSC.
In this embodiment, power control is performed on two mobile stations jointly according to the difference or ratio of the received signal strengths of the two mobile stations, so that the possibility of excessive interference between signals is effectively suppressed, the demodulation performance of the multiplexed mobile stations is improved, the multiplexing effect is improved, and the MUROS technology ensures the service quality while improving the voice capacity. The power control is carried out on the two mobile stations independently and then the two mobile stations are controlled jointly, so that the control accuracy can be further improved, and the system performance is greatly improved. The transmission power of one mobile station is reduced preferentially when the power is adjusted, the resources of the MS are saved when the signal quality is ensured to be within a reasonable range, and the method is beneficial to reducing the power consumption of the MS, increasing the standby time of the MS and the like.
The embodiments of the present invention may be implemented by software, and the corresponding software program may be stored in a readable storage medium, for example, a hard disk, a cache, or an optical disk of the BSC.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (15)
1. A method for controlling transmit power of a mobile station, the method comprising:
acquiring signals of two mobile stations;
adjusting the transmitting power of the two mobile stations to enable the difference value of the signal intensity of the two mobile stations to meet a first preset condition; or,
and adjusting the transmitting power of the two mobile stations to ensure that the ratio of the signal intensity of the two mobile stations meets a second preset condition.
2. The method for controlling the transmission power of the mobile station according to claim 1, wherein before the adjusting the transmission power of the two mobile stations to make the difference between the signal strengths of the two mobile stations satisfy a first preset condition; or, before the adjusting the transmission power of the two mobile stations so that the ratio of the signal strengths of the two mobile stations satisfies a second preset condition, the method further includes:
determining whether the signal strength of any one of the two mobile stations is between a preset upper signal strength limit and a preset lower signal strength limit,
if the signal strength of the mobile station is higher than the preset signal strength upper limit, reducing the transmitting power of the mobile station,
if the signal intensity of the mobile station is lower than the preset signal intensity lower limit, increasing the transmitting power of the mobile station;
and/or, judging whether the signal quality of any one of the two mobile stations is between a preset signal quality upper limit and a preset signal quality lower limit,
if the signal quality of the mobile station is higher than the preset signal quality upper limit, reducing the transmitting power of the mobile station,
and if the signal quality of the mobile station is lower than the preset signal quality lower limit, increasing the transmitting power of the mobile station.
3. The method of controlling transmit power of a mobile station according to claim 1,
the first preset condition includes: a preset signal intensity difference upper limit and a preset signal intensity difference lower limit;
the adjusting the transmission power of the two mobile stations to make the difference value of the signal strength of the two mobile stations satisfy a first preset condition comprises:
when the difference value of the signal strengths of the two mobile stations is higher than the preset upper limit of the signal strength difference value, adjusting the transmitting power of the two mobile stations according to the direction of reducing the difference value of the signal strengths of the two mobile stations;
and when the difference value of the signal strengths of the two mobile stations is lower than the preset lower limit of the signal strength difference value, adjusting the transmitting power of the two mobile stations according to the direction of increasing the difference value of the signal strengths of the two mobile stations.
4. The method of controlling transmit power of a mobile station according to claim 3,
the difference value of the signal strengths of the two mobile stations is the result of subtracting the signal strength of the second mobile station from the signal strength of the first mobile station in the two mobile stations;
adjusting the transmission power of the two mobile stations according to the direction of reducing the difference between the signal strengths of the two mobile stations specifically includes:
reducing the transmission power of the first mobile station under the condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than a preset signal quality lower limit;
adjusting the transmission power of the two mobile stations according to the direction of increasing the difference between the signal strengths of the two mobile stations specifically includes:
and reducing the transmission power of the second mobile station under the condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than the preset signal quality lower limit.
5. The method of claim 4, wherein after the reducing the transmission power of the first mobile station, further comprising:
if the signal strength of the first mobile station reaches a preset signal strength lower limit and the difference value of the signal strengths of the two mobile stations is still higher than the preset signal strength difference upper limit, the transmitting power of the second mobile station is increased until the difference value of the signal strengths of the two mobile stations is not higher than the preset signal strength difference upper limit or the signal strength of the second mobile station reaches a preset signal strength upper limit or the signal quality of the second mobile station reaches a preset signal quality upper limit.
6. The method of claim 4, wherein after the reducing the transmission power of the second mobile station, further comprising:
if the signal strength of the second mobile station reaches a preset signal strength lower limit and the difference value of the signal strengths of the two mobile stations is still lower than the preset signal strength difference lower limit, the transmitting power of the first mobile station is increased until the difference value of the signal strengths of the two mobile stations is not lower than the preset signal strength difference lower limit or the signal strength of the first mobile station reaches a preset signal strength upper limit or the signal quality of the first mobile station reaches a preset signal quality upper limit.
7. The method of controlling transmit power of a mobile station according to claim 1,
the second preset condition includes: a preset signal intensity ratio upper limit and a preset signal intensity ratio lower limit;
the adjusting the transmission power of the two mobile stations to make the ratio of the signal strengths of the two mobile stations satisfy a second preset condition specifically includes:
when the ratio of the signal strengths of the two mobile stations is higher than the preset upper limit of the signal strength ratio, adjusting the transmitting power of the two mobile stations according to the direction of reducing the ratio of the signal strengths of the two mobile stations;
and when the ratio of the signal strengths of the two mobile stations is lower than the preset lower limit of the signal strength ratio, adjusting the transmitting power of the two mobile stations according to the direction of increasing the ratio of the signal strengths of the two mobile stations.
8. The method of controlling transmit power of a mobile station according to claim 7,
the ratio of the signal strengths of the two mobile stations is the result of dividing the signal strength of the first mobile station by the signal strength of the second mobile station;
adjusting the transmission power of the two mobile stations according to the direction of reducing the ratio of the signal strengths of the two mobile stations specifically includes:
reducing the transmission power of the first mobile station under the condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than a preset signal quality lower limit;
adjusting the transmission power of the two mobile stations according to the direction of increasing the ratio of the signal strengths of the two mobile stations specifically includes:
and reducing the transmission power of the second mobile station under the condition that the signal quality of the first mobile station and the signal quality of the second mobile station are not lower than the preset signal quality lower limit.
9. The method of claim 8, wherein after the reducing the transmit power of the first mobile station, further comprising:
if the signal strength of the first mobile station reaches a preset signal strength lower limit and the ratio of the signal strengths of the two mobile stations is still higher than the preset signal strength ratio upper limit, the transmitting power of the second mobile station is increased until the ratio of the signal strengths of the two mobile stations is not higher than the preset signal strength ratio upper limit or the signal strength of the second mobile station reaches a preset signal strength upper limit or the signal quality of the second mobile station reaches a preset signal quality upper limit.
10. The method of claim 8, wherein after the reducing the transmission power of the second mobile station, further comprising:
if the signal strength of the second mobile station reaches a preset signal strength lower limit and the ratio of the signal strengths of the two mobile stations is still lower than the preset signal strength ratio lower limit, the transmitting power of the first mobile station is increased until the ratio is not lower than the preset signal strength ratio lower limit or the signal strength of the first mobile station reaches a preset signal strength upper limit or the signal quality of the first mobile station reaches a preset signal quality upper limit.
11. The method of controlling the transmission power of a mobile station according to any of claims 1 to 10, wherein the two mobile stations are multiplexed two mobile stations.
12. An apparatus for controlling transmit power of a mobile station, the apparatus comprising:
an acquisition module, configured to acquire signals of two mobile stations;
a joint control module, configured to adjust the transmission powers of the two mobile stations, so that a difference between the signal strengths of the two mobile stations obtained by the obtaining module meets a first preset condition; or adjusting the transmitting power of the two mobile stations to enable the ratio of the signal strength of the two mobile stations to meet a second preset condition.
13. The apparatus for controlling transmit power of a mobile station as claimed in claim 12, wherein said apparatus further comprises:
a signal strength control module, configured to determine whether a signal strength of any one of the two mobile stations is between a preset signal strength upper limit and a preset signal strength lower limit, decrease a transmission power of the mobile station if the signal strength of the mobile station is higher than the preset signal strength upper limit, and increase the transmission power of the mobile station if the signal strength of the mobile station is lower than the preset signal strength lower limit;
and/or the presence of a gas in the gas,
and the signal quality control module is used for judging whether the signal quality of any one of the two mobile stations is between a preset signal quality upper limit and a preset signal quality lower limit, reducing the transmitting power of the mobile station if the signal quality of the mobile station is higher than the preset signal quality upper limit, and increasing the transmitting power of the mobile station if the signal quality of the mobile station is lower than the preset signal quality lower limit.
14. The mobile station transmission power control apparatus of claim 12,
the first preset condition includes: a preset signal intensity difference upper limit and a preset signal intensity difference lower limit;
the combined control module specifically comprises:
a first difference processing unit, configured to adjust the transmit powers of the two mobile stations according to a direction in which the difference between the signal strengths of the two mobile stations is decreased when the difference between the signal strengths of the two mobile stations is higher than the preset upper limit of the signal strength difference;
and a second difference processing unit, configured to, when the difference between the signal strengths of the two mobile stations is lower than the preset lower limit of the signal strength difference, adjust the transmission powers of the two mobile stations according to a direction in which the difference between the signal strengths of the two mobile stations is increased.
15. The mobile station transmission power control apparatus of claim 12,
the second preset condition includes: a preset signal intensity ratio upper limit and a preset signal intensity ratio lower limit;
the combined control module specifically comprises:
a first ratio processing unit, configured to adjust the transmission power of the two mobile stations according to a direction of reducing the ratio of the signal strengths of the two mobile stations when the ratio of the signal strengths of the two mobile stations is higher than the preset upper limit of the signal strength ratio;
and a second ratio processing unit, configured to adjust the transmission powers of the two mobile stations according to a direction of increasing the ratio of the signal strengths of the two mobile stations when the ratio of the signal strengths of the two mobile stations is lower than the preset lower limit of the signal strength ratio.
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| CN2008101064683A CN101583181B (en) | 2008-05-13 | 2008-05-13 | Method and device for controlling transmission power of mobile station |
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| CN2008101064683A CN101583181B (en) | 2008-05-13 | 2008-05-13 | Method and device for controlling transmission power of mobile station |
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| CN102036321B (en) * | 2009-09-25 | 2013-12-18 | 上海华为技术有限公司 | Switching controlling method for multiplexing time slot user and wireless communication base station |
| CN102300302A (en) * | 2010-06-24 | 2011-12-28 | 中兴通讯股份有限公司 | Method and device for controlling joint power |
| WO2015042854A1 (en) * | 2013-09-27 | 2015-04-02 | 华为技术有限公司 | Method and device for adjusting sending power |
| CN104735766B (en) * | 2013-12-23 | 2019-01-04 | 联芯科技有限公司 | The Poewr control method and device of fractional dedicated physical channel |
| CN107682924B (en) * | 2017-09-30 | 2020-01-07 | 中国科学院计算技术研究所 | A link scheduling method and system suitable for long-delay SIC networks |
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