CN101345558B

CN101345558B - Method and device for controlling ascending exterior ring power

Info

Publication number: CN101345558B
Application number: CN2007101185683A
Authority: CN
Inventors: 王志军; 赵晓飞; 武占宇
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2007-07-09
Filing date: 2007-07-09
Publication date: 2012-02-22
Anticipated expiration: 2027-07-09
Also published as: CN101345558A

Abstract

The invention discloses a method for controlling uplink outer loop power, which comprises steps of regulating the UE target signal to interference ratio according to UE transmission BLER, down-regulating UE and related UE target signal to interference ratio when satisfying preset condition. Because the condition can be set according to practical need, UE target signal to interference ratio is agilely regulated by utilizing inventive method, and uplink outer loop power control can adapt to practical environment. The invention also discloses a device for controlling uplink outer loop power.

Description

Method and device for controlling uplink outer loop power

Technical Field

The present invention relates to power control technology in a CDMA (code division multiple access) mobile communication system, and more particularly, to a method and apparatus for controlling uplink outer loop power.

Background

A CDMA mobile communication system is a modulation and multiple access technique based on spread spectrum communication. In a CDMA mobile communication system, since a plurality of channels use the same radio frequency band, if an NB (base station) transmits a signal to a certain UE (user equipment), interference is caused to other UEs in the own cell and the neighboring cells. Similarly, the NB receives signals of a certain UE and is interfered by other UEs.

Since the CDMA mobile communication system is an interference-limited self-interference system, in order to maximize system capacity, a power control technique must be employed in the system to reduce interference between users.

Typical closed loop power control in a CDMA system includes inner loop power control and outer loop power control. The uplink inner loop power control process comprises the following steps: calculating transmission SIR (Signal to interference ratio) by using received power of useful signal and power of interference signal transmitted by a certain UE, and comparing SIR with SIR of the UE_Target(target signal-to-interference ratio) if SIR is greater than SIR_TargetInforming the UE to adjust the transmitting power down by one step length; if SIR is less than SIR_TargetThen the UE is notified to adjust the transmit power up by one step. Outer loop power control is used primarily to determine the SIR for uplink inner loop power control_Target. The process of the uplink outer loop power control comprises the following steps: comparing the transmission BLER (block error rate) of a certain UE reported in a period of time with the allowed BLER of the UE, if the reported BLER is larger than the allowed BLER, the SIR controlled by the uplink inner ring power is compared_TargetAnd adjusting up one step, otherwise, adjusting down one step.

For an individual UE, if the transmission SIR of the UE drops, it will result in an increase in the transmission BLER and a decrease in the quality of service. At this time, the SIR of the UE will be adjusted up through the uplink outer loop power control_TargetAnd then the transmitting power of the UE is increased through the uplink inner loop power control, thereby increasing the transmission SIR and achieving the purposes of reducing the transmission BLER and improving the service quality.

It can be seen that the current uplink outer loop power control method only considers the transmission BLER of the UE, but does not consider some other situations, such as UE specific situations or cell power load situations. When the transmission power of a certain UE is increased, the interference to other UEs in the same frequency and same time slot is increased, so that the transmission SIR of the other UEs is reduced, and the other UEs also up-regulate the transmission power, and the steps are repeated to enter a vicious circle. The net result is likely to be that the UEs in a cell all use high transmit power, resulting in excessive power loading in the cell. The other UEs in the same frequency and time slot are UEs that transmit signals using the same frequency point in the same time slot as the UE.

Based on the above analysis, there is also a possible extreme case that a certain UE has adjusted its transmit power to the maximum, but still cannot increase the transmission SIR, decrease the transmission BLER and improve the quality of service.

Disclosure of Invention

In view of this, the technical problem to be solved by the present invention is to provide a method and an apparatus for controlling uplink outer loop power, which can not only adjust SIR of UE according to transmission BLER_TargetOther conditions may also be used for SIR_TargetAnd (6) adjusting.

Therefore, the technical scheme provided by the invention is as follows:

a method for controlling uplink outer loop power comprises the following steps:

adjusting the target signal-to-interference ratio of the UE according to the transmission BLER of the UE; and when a preset condition is met, the target signal-to-interference ratio of the UE and the related UE is adjusted downwards;

the preset conditions are as follows: the transmitting power of the UE is larger than a first threshold value and the latest interference signal code power of the UE is larger than a second threshold value; or the current transmission power of the UE reaches the maximum transmission power of the UE and the latest interference signal code power of the UE is larger than a second threshold value;

or,

and the total power of the receiving bandwidths of all uplink time slots of all frequency points of the cell of the UE is greater than a third threshold value, or the code power of interference signals of all uplink time slots of all frequency points of the cell in which the UE is located is greater than a fourth threshold value.

And taking the interference signal code power of the uplink time slot used by the UE reported last time by the base station as the latest interference signal code power of the UE.

When the UE uses a plurality of uplink time slots, the maximum interference signal code power in all the time slots is used as the latest interference signal code power of the UE.

And obtaining the total received bandwidth power and/or the interference signal code power of all uplink time slots of all frequency points of the cell in which the UE is located through the measured value reported by the base station.

Wherein, relevant UE includes: and the UE is positioned in the local cell or the adjacent cell of the UE, has the same frequency and the same time slot with the UE, has the current target signal-to-interference ratio which is not the minimum value, and has the transmission BLER which is less than or equal to the allowed BLER.

Wherein, relevant UE includes: all the UEs in the local cell of the UE and the adjacent cells of the UE have the same frequency and the same time slot with the UEs in the local cell, the current target signal-to-interference ratio is not the minimum value, and the transmission BLER is required to be less than or equal to the UE of the allowed BLER.

An apparatus for controlling uplink outer loop power, comprising:

the target signal-to-interference ratio adjusting unit is used for adjusting the target signal-to-interference ratio of the UE according to the transmission block error rate BLER of the UE;

a first determining unit, configured to determine whether a latest interference signal code power of the UE is greater than a threshold when the transmission power of the UE is greater than a first threshold, or when the current transmission power of the UE reaches a maximum transmission power of the UE;

and a second target signal-to-interference ratio down-regulating unit, configured to down-regulate the target signal-to-interference ratios of the UE and the related UE when the latest interference signal code power of the UE is greater than a threshold value.

An apparatus for controlling uplink outer loop power, comprising:

a target signal-to-interference ratio adjusting unit, configured to adjust a target signal-to-interference ratio of the UE according to a transmission BLER of the UE;

a second determining unit, configured to determine whether total received bandwidth powers of all uplink timeslots of all frequency points of a cell in which the UE is located are greater than a third threshold, or whether interference signal code powers of all uplink timeslots of all frequency points of the cell in which the UE is located are greater than a fourth threshold;

and a third target signal-to-interference ratio down-regulating unit, configured to down-regulate the target signal-to-interference ratios of the UE and the related UEs when the total power of the received bandwidths of all uplink time slots of all frequency points of the cell in which the UE is located is greater than a third threshold, or when the code powers of the interference signals of all uplink time slots of all frequency points of the cell in which the UE is located are greater than a fourth threshold.

It can be seen that, when the technical scheme of the invention is adopted to carry out uplink outer loop power control, the target signal-to-interference ratio of the UE can be adjusted according to the transmission BLER of the UE; and when a preset condition is met, the target signal-to-interference ratio of the UE and the related UE is adjusted downwards. Because the condition can be set according to the actual requirement, the SIR can be more flexibly adjusted by using the technical scheme of the invention_TargetAnd the uplink outer loop power control can be better adapted to the actual requirements.

Drawings

FIG. 1 is a flow chart of example 1 of the method of the present invention;

FIG. 2 is a flow chart of method embodiment 2 of the present invention;

FIG. 3 is a flow chart of method embodiment 3 of the present invention;

FIG. 4 is a schematic view of a first apparatus provided by the present invention;

FIG. 5 is a schematic view of a second apparatus provided by the present invention;

fig. 6 is a schematic diagram of a third apparatus provided by the present invention.

Detailed Description

Currently, the NB calculates the transmission SIR of each UE according to equation (4-1):

SIR = 10 \log \frac{P_{r}}{P_{other} + P_{N}} - - - (4 - 1)

wherein, P_rIs the power, P, of the useful signal of the UE received by the NB_otherIs the total transmission power, P, of other UEs of the same frequency and time slot received by the NB_NIs the total power of other interfering signals received by the NB. P_otherIs dependent on the transmission power, P, of other UEs in the same frequency and time slot_NDepending on the channel environment.

As can be seen from the formula (4-1), the transmission SIR of the UE is influenced by P_r、P_otherAnd P_NOf P, and P_rAnd P_otherIs controllable, P_NAre difficult to control. When the channel environment is severe, P_NWill rise. Accordingly, the transmission SIR can be maintained at a desired level only by increasing the transmission power of the UE. Although increasing the transmission power of the UE will also increase the interference to other UEs in the same frequency and same time slot, when the channel environment is worse, the channel environment has a greater influence on the transmission SIR, so the interference between UEs in the same frequency and same time slot can be temporarily ignored.

When the channel environment is good, the interference between UEs in the same frequency and time slots has a greater influence on the transmission SIR of the UE, and if the transmission power of a certain UE is increased, other UEs in the same frequency and time slots also adjust the transmission power up, and so on, and enter a vicious circle. The end result is likely that the UEs in the same frequency and same time slot in a cell all use high transmission power, resulting in too high power load in the cell.

As can be seen from the above analysis, when controlling the transmission power of the UE, the transmission power of the UE should be adjusted after considering not only the transmission SIR but also other situations.

If the transmitting power of the UE is adjusted by referring to other conditions during the uplink inner loop power control, the method has the following disadvantages: the period for adjusting the transmitting power of the UE through the uplink inner loop power control is very short, and can reach 1 time/5 milliseconds in a TD-SCDMA 1.28M system. If the transmit power of the UE is adjusted with reference to other conditions, the adjustment period is long, on the order of seconds, and this delay is not allowed in the power adjustment, and has no practical significance.

If SIR is adjusted with reference to other conditions in uplink outer loop power control_TargetThe advantages are that: the period of the uplink outer ring power control is longer and is in the second order, and the uplink inner ring power control can be indirectly controlled through the uplink outer ring power control, if other conditions are referred to, the SIR is adjusted_TargetThe method is a beneficial supplement of uplink outer loop power control, and does not influence the uplink inner loop power controlSpeed, in turn, indirectly affects the outcome of the uplink inner loop power control.

Therefore, it is feasible to adjust the SIR not only according to the transmission BLER of the UE when performing uplink outer loop power control_TargetAnd also adjusts SIR with reference to other conditions_TargetTherefore, the uplink outer loop power control is better adapted to the actual wireless environment. And the uplink inner loop power control is influenced through the uplink outer loop power control, so that the transmitting power of the UE is closer to the actual requirement.

In order that those skilled in the art will better understand the present invention, the methods provided herein are described in detail below with reference to specific examples.

When performing uplink outer loop power control, a large number of situations can be considered, and the situations should be determined according to actual needs.

One situation is: and when the uplink outer loop power control is carried out, the communication quality of the UE is improved as much as possible. An uplink outer loop power control method considering such a situation is given in embodiment 1, and fig. 1 is a flowchart of embodiment 1.

In step 101, after the UE establishes RRC (Radio Resource Control) connection, it triggers the UE to report 6a (the UE Tx power larger than absolute threshold)/6d (the UE Tx power reacquiries maximum value).

After the UE establishes RRC, an RNC (radio network controller) may send a Measurement control message to the UE to trigger the UE to report 6A/6D;

after receiving the Measurement control message, the UE starts to perform periodic Measurement, and reports 6A/6D to the RNC in an event mode through a Measurement report message.

In step 102, uplink outer loop power control is performed according to the existing uplink outer loop power control method, that is, the SIR of the UE is adjusted according to the transmission BLER of the UE_Target。

When the transmission power is greater than the threshold or the transmission power reaches the maximum, the UE reports 6A/6D in step 103.

When the UE reports 6A/6D, the transmitting power of the UE is shown to reach the maximum value, and the transmitting power of the UE cannot be adjusted up. At this time, SIR should be passed_TargetThe transmission SIR of the UE is indirectly maintained or adjusted downward. Therefore, in step 104, the SIR of the UE and other UEs satisfying the condition is adjusted downward_Target. The SIR can be adjusted down by one step_Target。

Wherein the condition can be specifically set according to requirements, for example,

the conditions may be: the UE is positioned in the local cell and the adjacent cell and has the same frequency and the same time slot with the UE;

the conditions may also be: in the local cell and the adjacent cell, and has the same frequency and the same time slot as the UE, and the current SIR_TargetIs a non-minimum value;

the conditions may also be: in the local cell and the adjacent cell, and has the same frequency and the same time slot as the UE, and the current SIR_TargetIs not the minimum and the transmission BLER must be less than or equal to the allowed BLER.

The cell refers to a cell in which the UE is located.

By adjusting SIR of multiple UEs down_TargetThe transmission power of the plurality of UEs can be reduced, and the interference among the plurality of UEs can be reduced, thereby achieving the purpose of reducing the transmission power of the plurality of UEs.

It can be seen that in the method described in embodiment 1, the SIR is adjusted in the existing uplink outer loop power control method_TargetAt the same time, the SIR is also matched according to the condition of the transmitting power of the UE_TargetAdditional downregulation was performed.

However, there are many factors that cause the transmit power of the UE to reach a maximum value. In one case, the interference of other UEs to the UE is relatively large, so the UE correspondingly increases the transmission power. In another case, the UE is far away from the NB, and although the interference of other UEs to the UE is relatively small, the UE still needs to increase the transmission power to maintain normal communication with the NB.

For the second case, although the UE reports 6A/6D, if the SIR is adjusted downward_TargetIt is likely that the UE will indirectly adjust its transmit power downward through uplink inner loop power control, resulting in the UE being unable to communicate with the network side.

Through the above analysis, the method described in example 1 was modified. Adjusting SIR according to existing uplink outer loop power control method_TargetMeanwhile, not only the condition of the transmitting power of the UE but also the interference condition of other UEs to the UE are considered, and then the two conditions are combined to decide whether to adjust down the SIR_Target. Example 2 is a modification of example 1 and figure 2 is a flow chart of example 2.

In step 201, after a cell is established, the measurement of the ISCP (Interference Signal Code Power) of all frequency points and all uplink timeslots of the cell is triggered.

The ISCP measurement of all frequency points and all uplink time slots of the cell is periodic, and the measurement result is reported periodically. For a certain UE, the interference situation of other UEs to the UE can be known through the ISCP of the uplink time slot used by the UE, and the value of the ISCP is equivalent to the P in the formula (4-1)_other。

In step 202, after the UE establishes the RRC connection, the UE is triggered to report 6A/6D.

In step 203, uplink outer loop power control is performed according to the existing uplink outer loop power control method.

In step 204, the UE reports 6A/6D.

When the UE reports 6A/6D, in step 205, the latest ISCP of the UE is compared with a set threshold, and it is determined whether the ISCP is greater than the threshold.

Since the NB periodically measures and reports the ISCPs of all frequency points and all uplink timeslots in the cell, when the UE reports 6A/6D, the latest ISCP of the uplink timeslot used by the UE reported by the NB is used as the latest ISCP of the UE.

And when the UE uses a plurality of uplink time slots, taking the maximum ISCP in all the time slots as the latest ISCP of the UE.

Through the latest ISCP of the UE, the latest interference situation of other UEs to the UE can be embodied. By comparing the ISCP value with the threshold value, whether the interference of other UEs to the UE exceeds the allowable range can be determined.

If the ISCP is less than or equal to the threshold value, i.e. the interference of other UEs to the UE does not exceed the allowable range, it indicates that the interference of other UEs to the UE is smaller although the transmission power of the UE is large, indicating that the UE may be located at the cell edge, so in step 206, the SIR of the UE is maintained_TargetAnd is not changed.

If the ISCP is greater than the threshold value, i.e. the interference of other UEs to the UE exceeds the allowable range, it indicates that not only the transmission power of the UE is large but also the interference of other UEs to the UE is large, indicating that the increase of the transmission power of the UE is probably caused by the interference of other UEs, therefore, in step 207, the SIR of the UE and other UEs satisfying the condition is adjusted downward_Target。

It can be seen that in the method described in embodiment 2, the SIR is adjusted in the existing uplink outer loop power control method_TargetAt the same time, not only the condition of the transmitting power of the UE is considered, but also the interference condition between the UE is considered, and the SIR is adjusted_TargetAdditional downregulation was performed. Thereby making the method more reliable and reducing the SIR of the UE erroneously adjusted downward_TargetThe probability of (c).

The methods described in embodiments 1 and 2 are both based on the condition of the UE to adjust the SIR of the UE_TargetTo promote U as much as possible when performing uplink outer loop power controlE communication quality. Another conceivable scenario while performing uplink outer loop power control is to reduce the power load of the cell. The method will be described in detail with reference to example 3, and fig. 3 is a flowchart of example 3.

In step 301, after a cell is established, measurements of all uplink timeslots of all frequency points of the cell are triggered.

After a cell is established, the RNC sends common measurement Initiation Request (common measurement Initiation Request) information to the NB aiming at all uplink time slots of all frequency points of the cell;

after receiving each Common Measurement Initiation Request message, NB feeds back a corresponding Common Measurement Initiation Response message to RNC;

then, NB will periodically measure the Received total bandwidth band power and/or ISCP of all uplink timeslots of all frequency points according to the measurement configuration parameters.

In step 302, uplink outer loop power control is performed according to the existing uplink outer loop power control method.

The NB can periodically Report the total received bandwidth power and/or the ISCP of all uplink timeslots of all frequency points obtained by Measurement to the RNC through a Common Measurement Report message.

In step 303, the measurement value reported by the NB is obtained, and then in step 304, the reported measurement value is compared with a set threshold value to know whether the measurement value is greater than the threshold value.

When the measured value reported by the NB is the total received bandwidth power or ISCP of all uplink time slots of all frequency points, comparing the total received bandwidth power of all uplink time slots of all frequency points with a set first threshold value, or comparing the ISCP of all uplink time slots of all frequency points with a set second threshold value;

when the measured values reported by the NB are the total received bandwidth power and the ISCP of all uplink timeslots of all frequency points, one of them may be selected. When the total power of the receiving bandwidth is selected, the total power of the receiving bandwidth of all uplink time slots of all the frequency points is compared with a set first threshold value, and when the ISCP is selected, the ISCP of all the uplink time slots of all the frequency points is compared with a set second threshold value.

If the reported measured value is greater than the set threshold value, that is, the total power of the received bandwidths of all uplink timeslots of all frequency points is greater than the first threshold value, or the ISCPs of all uplink timeslots of all frequency points are greater than the second threshold value, it indicates that the power load of the cell is large and the power load of the cell needs to be reduced, so in step 305, the SIR of all UEs in the cell is reduced_Target。

In order to better reduce the power load of the cell, the SIR of all the UEs in the cell is reduced_TargetAnd simultaneously, the UE which has the same frequency and time slot with each UE of the local cell in the adjacent cell can be adjusted downwards, the current target signal-to-interference ratio is not the minimum value, and the transmission BLER is required to be less than or equal to the UE of the allowed BLER.

If the reported measured value is less than or equal to the set threshold value, that is, the total received bandwidth power is not greater than the first threshold value, or the ISCP of each uplink timeslot of each frequency point is not greater than the second threshold value, it indicates that the power load of the cell is within the allowable range, so in step 306, the SIR of all UEs in the cell is maintained_TargetAnd is not changed.

Adjusting the SIR of a UE down whether the method is described in embodiment 1 or in embodiment 2 or 3_TargetThen, the uplink inner loop power control will be based on the SIR after the down regulation_TargetThe transmitting power of the corresponding UE is adjusted, and the prior uplink outer ring power control method can also adjust the SIR after the UE is adjusted downwards according to the transmission BLER of the UE_TargetThe adjustment is performed again and will not be described in detail here.

It should be noted here that the existing uplink outer loop power control and SIR pair are used_TargetIs performed in parallel, thusIn embodiment 1, embodiment 2 or embodiment 3, the SIR of the UE is decided to be adjusted downward_TargetAt this time, if the uplink outer ring power control decides to up-regulate SIR of UE according to transmission BLER of UE at this time_TargetPreferentially performing down-regulation of SIR of UE_Target。

Based on the method, the invention also provides a corresponding device for controlling the uplink outer ring power.

Fig. 4 is a schematic diagram of an apparatus for controlling uplink outer loop power, which includes a target signal to interference ratio adjustment unit S41 and a first target signal to interference ratio down-regulation unit S42.

After the UE establishes the RRC, the RNC may send a Measurement control message to the UE to trigger the UE to report 6A/6D. After receiving the Measurement control message, the UE starts to perform periodic Measurement and reports 6A/6D to the RNC through a Measurement report message in an event mode.

When the system normally operates, the target SIR adjusting unit S41 performs uplink outer loop power control according to the existing uplink outer loop power control method, that is, adjusts the SIR of the UE according to the transmission BLER of the UE_Target。

When the UE reports 6A/6D, the transmitting power of the UE is shown to reach the maximum value, and the transmitting power of the UE cannot be adjusted up. At this time, the target signal-to-interference ratio down-regulation unit S42 will down-regulate the SIR of the UE and other UEs satisfying the condition_Target. The SIR can be adjusted down by one step_Target。

It can be seen that in the apparatus shown in fig. 4, the SIR is adjusted according to the existing uplink outer loop power control method_TargetAt the same time, the SIR is also matched according to the condition of the transmitting power of the UE_TargetAdditional downregulation was performed.

From the above analysis, the apparatus shown in fig. 4 was modified, and the modified apparatus is shown in fig. 5. Adjusting SIR according to existing uplink outer loop power control method_TargetMeanwhile, not only the condition of the transmitting power of the UE but also the interference condition of other UEs to the UE are considered, and then the two conditions are combined to decide whether to adjust down the SIR_Target。

In the apparatus shown in fig. 5, a target signal to interference ratio adjusting unit S41, a first judging unit S51, and a second target signal to interference ratio down-regulating unit S52 are included.

After the cell is established, triggering to measure ISCP of all frequency points and all uplink time slots of the cell. And after the UE establishes the RRC connection, triggering the UE to report 6A/6D.

The target sir adjusting unit S41 still performs uplink outer loop power control according to the existing uplink outer loop power control method.

When the UE reports 6A/6D, the determining unit S51 compares the latest ISCP determined by the UE with the set threshold, and determines whether the ISCP is greater than the threshold.

If the ISCP is less than or equal to the threshold value, that is, the interference of other UEs to the UE does not exceed the allowable range, it indicates that the interference of other UEs to the UE is smaller although the transmission power of the UE is large, which indicates that the UE may be located at the cell edge, therefore, the SIR of the UE is maintained_TargetAnd is not changed.

If the ISCP is greater than the threshold value, i.e. the interference of other UEs to the UE exceeds the allowable range, it indicates that not only the transmission power of the UE is large but also the interference of other UEs to the UE is large, indicating that the increase of the transmission power of the UE is likely caused by the interference of other UEs, so the target SIR down-regulation unit S52 will down-regulate the SIR of the UE and other UEs meeting the condition_Target。

It can be seen that in the apparatus shown in fig. 5, the SIR is adjusted according to the existing uplink outer loop power control method_TargetAt the same time, not only the condition of the transmitting power of the UE is considered, but also the interference condition between the UE is considered, and the SIR is adjusted_TargetAdditional downregulation was performed. Thereby the device has more reliable performance and reduces the SIR of the UE which is adjusted down by mistake_TargetThe probability of (c).

The apparatus shown in FIG. 4 and FIG. 5 are both for adjusting the SIR of the UE based on the condition of the UE_TargetTo improve the communication quality of the UE as much as possible when performing uplink outer loop power control. Another conceivable scenario while performing uplink outer loop power control is to reduce the power load of the cell. The apparatus is described in detail below with reference to an embodiment, and fig. 6 is a schematic diagram of the apparatus, including: a target signal to interference ratio adjusting unit S41, a second judging unit S61, and a fourth judging unitA three target signal to interference ratio down-regulation unit S62.

After a cell is established, the RNC sends CommonMeasure Initiation Request information to the NB aiming at each uplink time slot of each frequency point of the cell;

after receiving each Common Measurement Initiation Request message, the NB feeds back a corresponding Common Measurement Initiation Response message to the RNC;

then, NB will periodically measure the total received bandwidth power and/or ISCP of each uplink timeslot of each frequency point according to the measurement configuration parameters.

The NB can periodically Report the total received bandwidth power and/or the ISCP of each uplink timeslot of each frequency point obtained by Measurement to the RNC through a Common Measurement Report message.

After the RNC obtains the measurement value reported by the NB, the determining unit S61 compares the reported measurement value with the set threshold value to know whether the measurement value is greater than the threshold value.

When the measured value reported by the NB is the total received bandwidth power or the ISCP of each uplink time slot of each frequency point, the determining unit S61 compares the total received bandwidth power of each uplink time slot of each frequency point with the set first threshold value, or compares the ISCP of each uplink time slot of each frequency point with the set second threshold value;

when the measured value reported by the NB is the total received bandwidth power and the ISCP of each uplink timeslot of each frequency point, the determining unit S61 may select one of them. When the total power of the receiving bandwidth is selected, the total power of the receiving bandwidth of each uplink time slot of each frequency point is compared with a set first threshold value, and when the ISCP is selected, the ISCP of each uplink time slot of each frequency point is compared with a set second threshold value.

If reported, the measurementIf the magnitude is greater than the set threshold, that is, the total received bandwidth power is greater than the first threshold, or the ISCP of each uplink timeslot of each frequency point is greater than the second threshold, it indicates that the power load of the cell is large and needs to be reduced, and at this time, the target SIR down-regulation unit S62 will down-regulate the SIR of all UEs in the cell_Target。

To better reduce the power load of the cell, the target SIR down-regulation unit S62 regulates the SIR of all UEs in the cell to be lower_TargetAt the same time, the SIR of the adjacent cell UE with the same frequency and time slot with all the UE in the cell can be adjusted downwards_Target。

If the reported measured value is less than or equal to the set threshold value, that is, the total received bandwidth power is not greater than the first threshold value, or the ISCP of each uplink time slot of each frequency point is not greater than the second threshold value, it indicates that the power load of the cell is within the allowable range, and at this time, the SIR of all UEs in the cell is maintained_TargetAnd is not changed.

The disclosed embodiments are provided to enable those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the scope or spirit of the invention. The above-described embodiments are merely preferred embodiments of the present invention, which should not be construed as limiting the invention, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A method for controlling uplink outer loop power, comprising:

adjusting a target signal-to-interference ratio of User Equipment (UE) according to the transmission block error rate (BLER) of the UE; and when a preset condition is met, the target signal-to-interference ratio of the UE and the related UE is adjusted downwards;

or,

2. The method of claim 1, wherein the latest iscp of the UE is the iscp of the UE reported last by the base station.

3. The method of claim 2, wherein when the UE uses a plurality of uplink timeslots, the maximum iscp in all timeslots is used as the latest iscp of the UE.

4. The method of claim 1, wherein the total received bandwidth power and/or the interference signal code power of all uplink timeslots of all frequency points of the cell of the UE are obtained through a measurement value reported by a base station.

5. The method for controlling uplink outer loop power according to any one of claims 1 to 3, wherein the related UE comprises: and the UE is positioned in the local cell or the adjacent cell of the UE, has the same frequency and the same time slot with the UE, has the current target signal-to-interference ratio which is not the minimum value, and has the transmission BLER which is less than or equal to the allowed BLER.

6. The method for controlling uplink outer loop power according to claim 1 or 4, wherein the related UE comprises: all the UEs in the local cell of the UE and the adjacent cells of the UE have the same frequency and the same time slot with the UEs in the local cell, the current target signal-to-interference ratio is not the minimum value, and the transmission BLER is required to be less than or equal to the UE of the allowed BLER.

7. An apparatus for controlling uplink outer loop power, comprising:

the target signal-to-interference ratio adjusting unit is used for adjusting the target signal-to-interference ratio of User Equipment (UE) according to the transmission block error rate (BLER) of the UE;

8. An apparatus for controlling uplink outer loop power, comprising: