CN105657806B - Method and base station for controlling uplink enhanced CELL _ FACH power - Google Patents

Method and base station for controlling uplink enhanced CELL _ FACH power Download PDF

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CN105657806B
CN105657806B CN201410734246.1A CN201410734246A CN105657806B CN 105657806 B CN105657806 B CN 105657806B CN 201410734246 A CN201410734246 A CN 201410734246A CN 105657806 B CN105657806 B CN 105657806B
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value
sirtarget
cell
preset
load
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CN105657806A (en
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陈锹
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ZTE Corp
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ZTE Corp
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Priority to PCT/CN2015/079405 priority patent/WO2016086621A1/en
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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
    • H04W52/12—Outer and inner loops
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

The invention provides a method and a base station for controlling uplink enhanced CELL _ FACH power, wherein the method comprises the following steps: when an uplink enhanced CELL _ FACH service is established, acquiring a load value of a CELL; and adjusting the signal interference ratio (SIR target) of the uplink enhanced CELL _ FACH service according to the acquired load value of the CELL and a preset load threshold value of the CELL. The method and the base station for controlling the uplink enhanced CELL _ FACH power can timely reduce the SIR target value of the uplink enhanced CELL _ FACH service according to the CELL load level, reduce the transmitting power of UE (User Equipment) and avoid causing CELL overload.

Description

Method and base station for controlling uplink enhanced CELL _ FACH power
Technical Field
The invention relates to the field of communication, in particular to a method and a base station for controlling uplink enhanced CELL _ FACH power.
Background
In order to break the limitation of the transmission capability of the RACH (Random Access Channel) and improve the Uplink performance in the CELL _ FACH state, 3GPP R8 introduces an UL EFACH (Enhanced Uplink CELL _ FACH Uplink Enhanced CELL _ FACH) function. The UL EFACH function is mainly characterized in that an enhanced dedicated channel Common E-DCH is used for uplink data transmission in a CELL _ FACH state. However, Common E-DCH is data for short-time large packets, and the duration is usually short, and it is unable to perform outer loop power control through RNC (Radio Network Controller).
The current implementation mode is that the RNC sets a fixed signal to interference ratio target value SIR target (SIR is the ratio of the useful signal power to the total power of the interference signal plus power noise) for the UL EFACH service, and allocates the fixed SIR target value to the base station through the uplink SIR target value in the physical shared channel RECONFIGURATION REQUEST PHYSICAL SHARED CHANNEL RECONFIGURATION REQUEST message, but the fixed SIR target value is difficult to determine, and if the setting is too large, when the base station performs inner loop power control, the base station will continuously increase the transmission power of the UE (User Equipment) by comparing the received uplink SIR value with the preset fixed SIR target value, which is likely to cause cell overload, and further cause resource limitation, and affect the service rate of the User.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and a base station for controlling uplink enhanced CELL _ FACH power, which timely down-regulates the SIR target value of uplink enhanced CELL _ FACH service (namely UL EFACH service) according to the CELL load level, and reduces the transmission power of UE (User Equipment).
In order to solve the above problem, the present invention provides a method for uplink enhanced CELL _ FACH power control, which comprises:
when the UL EFACH service is established, acquiring a load value of a cell;
and adjusting the signal interference ratio (SIR target) of the UL EFACH service according to the acquired load value of the cell and a preset load threshold value of the cell.
Wherein, the step of adjusting the signal interference ratio of the UL EFACH service to the target value SIR target according to the acquired load value of the cell and the preset load threshold value of the cell includes:
judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards;
if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
Wherein, if the obtained load value of the cell is judged to be greater than the preset load threshold value of the cell, after the SIR target value is adjusted downward, the method further includes:
and judging whether the SIR target value is continuously adjusted downwards or not according to the adjusted SIR target value and a preset SIR target downward adjustment limiting value.
Wherein, the step of judging whether to continuously adjust the SIR target value down according to the adjusted SIR target value and a preset limit value of the adjusted SIR target value down comprises the following steps:
judging whether the down-regulated SIR target value is larger than the preset SIR target down-regulation limiting value or not;
if the SIR target value after being adjusted downwards is judged to be larger than the preset SIR target downwards-adjusting limiting value, continuously adjusting the SIR target value downwards until the obtained load value of the cell is smaller than or equal to the preset load threshold value of the cell, and stopping adjusting the SIR target value downwards;
and stopping down regulating the SIR target value if the SIR target value after down regulation is judged to be less than or equal to the preset limit value of SIR target down regulation.
Wherein, when the UL EFACH service is established, before obtaining the load value of the cell, the method further includes:
and judging whether the SIR target value is adjusted downwards or not according to the SIR target value and a preset limit value of SIR target down adjustment.
Wherein, the step of judging whether to adjust the SIR target value downwards according to the SIR target value and a preset limit value of SIR target downwards adjustment comprises the following steps:
judging whether the SIR target value is larger than a preset SIR target down-regulation limit value or not;
if the SIR target value is judged to be smaller than or equal to the limit value of the SIR target down regulation, the SIR target value is not down regulated.
Wherein the method further comprises:
if the SIR target value is judged to be larger than the limit value of the SIR target down regulation, further judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards, and the SIR target value is stopped to be adjusted downwards until the adjusted SIR target value is smaller than or equal to the limit value of the SIR target value adjusted downwards;
if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
In addition, the present invention also provides a base station, comprising:
the calculation module is used for acquiring a load value of a cell when an UL EFACH service is established;
and the down-regulation module is used for regulating the signal interference ratio of the UL EFACH service to the target value SIR target according to the acquired load value of the cell and the preset load threshold value of the cell.
Wherein the down-regulation module is specifically configured to:
judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell; if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards; if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
Wherein the downregulating module is further to:
and judging whether the SIR target value is continuously adjusted downwards or not according to the adjusted SIR target value and a preset SIR target downward adjustment limiting value.
Wherein the down-regulation module is specifically configured to:
judging whether the down-regulated SIR target value is larger than the preset SIR target down-regulation limiting value or not;
if the SIR target value after being adjusted downwards is judged to be larger than the preset SIR target downwards-adjusting limiting value, continuously adjusting the SIR target value downwards until the obtained load value of the cell is smaller than or equal to the preset load threshold value of the cell, and stopping adjusting the SIR target value downwards;
and stopping down regulating the SIR target value if the SIR target value after down regulation is judged to be less than or equal to the preset limit value of SIR target down regulation.
Wherein, when the UL EFACH service is established in the calculation module, before obtaining the load value of the cell, the base station further includes:
and the comparison module is used for judging whether the SIR target value is adjusted downwards or not according to the SIR target value and a preset limit value of SIR target down-adjustment.
Wherein the comparison module is specifically configured to:
judging whether the SIR target value is larger than a preset SIR target down-regulation limit value or not; if the SIR target value is judged to be smaller than or equal to the limit value of the SIR target down regulation, the SIR target value is not down regulated.
Wherein, the comparison module is further specifically configured to:
if the SIR target value is judged to be larger than the limit value of the SIR target down regulation, further judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards, and the SIR target value is stopped to be adjusted downwards until the adjusted SIR target value is smaller than or equal to the limit value of the SIR target value adjusted downwards;
if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
The scheme of the invention at least has the following beneficial effects:
in the uplink enhanced CELL _ FACH power control method and the base station, whether the SIR target value is adjusted or not is judged by comparing the acquired load value of the CELL with the preset load threshold value of the CELL under the UL EFACH service state.
Drawings
Fig. 1 is a schematic diagram illustrating steps of a method for controlling uplink enhanced CELL _ FACH power according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating specific steps of adjusting the SIR target value according to the acquired load value of the cell and a preset load threshold value of the cell in the embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a step of determining whether to continue decreasing the SIR target value according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating a step of determining whether to adjust the SIR target value downward according to the SIR target value and a preset limit value of SIR target downward adjustment in the embodiment of the present invention;
FIG. 5 is a diagram illustrating the components of a base station according to an embodiment of the present invention;
FIG. 6 is a schematic flow chart of an embodiment of the present invention;
fig. 7 shows a schematic flow diagram of yet another embodiment provided in an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments.
The invention provides a method and a base station for controlling uplink enhanced CELL _ FACH power, aiming at the problem that the prior RNC can not adjust the SIR target value of UL EFACH service to be adjusted downwards through outer loop power control.
As shown in fig. 1, an embodiment of the present invention provides a method for uplink enhanced CELL _ FACH power control, where the method includes:
step S11: when the UL EFACH service is established, acquiring a load value of a cell;
step S12: and adjusting the signal interference ratio (SIR target) of the UL EFACH service according to the acquired load value of the cell and a preset load threshold value of the cell.
In the embodiment of the invention, the SIR target value is directly adjusted according to the load level of the cell, the method is simpler, the adjustment time is fast, and the problem of resource limitation caused by cell overload can be quickly solved.
It should be noted that the calculation of the cell load may be based on the unit load, or based on the selection of the cable cross section in the cell, or any other method that can implement the calculation of the cell load, and is not limited herein.
Specifically, in step S12, the adjusting of the signal to interference ratio (SIR target) of the UL EFACH service according to the obtained load value of the cell and the preset load threshold value of the cell may be further divided into the following steps, as shown in fig. 2:
step S121: judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
step S122: if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards;
step S123: if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
It should be noted that the SIR target value is not always adjusted downward, and whether the SIR target value continues to be adjusted downward needs to be further determined, that is: judging whether to continuously adjust the SIR target value downwards according to the adjusted SIR target value and a preset SIR target downwards adjusting limit value, as shown in FIG. 3, specifically comprising the following steps:
step S13: judging whether the down-regulated SIR target value is larger than the preset SIR target down-regulation limiting value or not;
step S14: if the SIR target value after being adjusted downwards is judged to be larger than the preset SIR target downwards-adjusting limiting value, continuously adjusting the SIR target value downwards until the obtained load value of the cell is smaller than or equal to the preset load threshold value of the cell, and stopping adjusting the SIR target value downwards;
step S15: and stopping down regulating the SIR target value if the SIR target value after down regulation is judged to be less than or equal to the preset limit value of SIR target down regulation.
In the above embodiment of the present invention, when performing the UL EFACH service, the load value of the cell is compared with the load threshold value, and whether to down-regulate the SIR target value is determined according to the comparison result. In addition, when the SIR target is adjusted down to be less than or equal to the limit value for adjusting the SIR target down, the procedure of continuously adjusting the SIR target down is not considered.
In order to more clearly achieve the above purpose, the present embodiment provides a specific solution, as shown in fig. 6:
step 61: in the UL EFACH service state, the RNC sets a fixed SIR target value, the base station sets a cell load threshold value, such as a proportional value of 50%, according to the load level of the cell, such as ROT (rapid over Thermal noise rise), and sets a minimum limit value, such as 0db, for the SIR target down-regulation;
step 62: initiating UL EFACH service;
and step 63: calculating the load value of the cell;
step 64: if the calculated load value of the cell is less than or equal to the preset load threshold value, it can be determined that the cell is not overloaded and the service rate of the user is not affected, then step 65 is entered, and the SIR target value does not need to be adjusted downward;
and step 66: if the calculated load value of the cell is larger than a load threshold value preset by the base station, judging that the cell is overloaded at the moment, and reducing the SIR target value, wherein the step size of the reduction can be set according to the actual situation, and is larger or smaller;
step 67: in the process of adjusting the SIR target value downward, it is further necessary to determine whether the SIR target value continues to be adjusted downward, and if the adjusted SIR target value is less than or equal to the preset SIR target downward adjustment limit value, step 65 is performed, the procedure of adjusting the SIR target downward is not required to be continued, and it may be considered that the load of the cell is reduced by other methods, such as releasing some users. If the SIR Target value after the down-regulation is larger than the preset SIR Target down-regulation limiting value, returning to the step 63 to continuously calculate the cell load after the down-regulation, and judging whether the cell load exceeds the load threshold value, if so, continuing to reduce the SIR Target value in the step 66; otherwise, step 65 is entered without further down-regulation.
In addition, the embodiment of the invention also provides a method for judging whether the SIR target value is adjusted downwards, which comprises the following steps: before acquiring the load value of the cell, judging whether to adjust the SIR target value downward according to the SIR target value and a preset limit value of SIR target downward adjustment, as shown in fig. 4, the specific steps include:
step S16: judging whether the SIR target value is larger than a preset SIR target down-regulation limit value or not;
step S17: if the SIR target value is judged to be smaller than or equal to the limit value of SIR target down regulation, the SIR target value is not down regulated;
step S18: if the SIR target value is judged to be larger than the limit value of the SIR target down regulation, further judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
step S19: if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards, and the SIR target value is stopped to be adjusted downwards until the adjusted SIR target value is smaller than or equal to the limit value of the SIR target value adjusted downwards;
step S20: if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
In the above embodiment of the present invention, when performing UL EFACH service, the SIR target value is first compared with the down-regulation limit value, and if the SIR target value is less than or equal to the down-regulation limit value, the SIR target is not down-regulated; otherwise, the load value of the cell is compared with the cell load threshold value set by the base station, and whether the SIR target value is adjusted downwards is determined according to the comparison result.
Also, in order to achieve the above purpose more clearly, the present embodiment provides a specific solution, as shown in fig. 7:
step 71: setting a fixed SIR target value by an RNC (radio network controller), and setting a cell load threshold value and a SIR target down-regulation limit value by a base station;
step 72: initiating UL EFACH service;
step 73: judging whether the SIR target value is less than or equal to the down-regulation limiting value, if so, entering a step 74, and not adjusting the SIR target value;
step 75: if the SIR target value is judged to be larger than the down-regulated limit value, calculating the load value of the cell;
step 76: judging whether the load value of the cell is larger than the threshold value of the load, if the load value of the cell is smaller than or equal to the threshold value of the load, judging that the cell is not overloaded, entering step 74, and not needing to reduce the SIR target value;
step 77: if the load value of the cell is higher than the threshold value of the load, the cell is judged to be overloaded at this time, the SIR target value needs to be adjusted downwards, the SIR target value is reduced, and the step size step of each downward adjustment can be set according to the actual situation. After the down-regulation, continuing to step 73, comparing the down-regulated SIR target value with the down-regulation limit value until the down-regulated SIR target value is less than or equal to the SIR target down-regulation limit value, and stopping the down-regulation of the SIR target value.
Finally, as shown in fig. 5, an embodiment of the present invention further provides a base station, including:
a calculating module 21, configured to obtain a load value of a cell when an UL EFACH service is established;
and a down-regulation module 22, configured to regulate the signal to interference ratio of the UL EFACH service to the target SIR target according to the obtained load value of the cell and a preset load threshold of the cell.
Further, according to the functional division, the base station further comprises:
and the setting module is used for setting a threshold value of cell load, an SIR target value and an SIR target down-regulation limit value, and can also set a down-regulation step length in the SIR target down-regulation process.
In the above embodiments of the present invention, the base station directly adjusts the SIR target value in the UL EFACH service according to the load level of the cell, and the adjustment time is relatively fast.
Further, the down-regulation module 22 is specifically configured to: judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell; if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards; if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
Further, the downregulating module is further to: and judging whether the SIR target value is continuously adjusted downwards or not according to the adjusted SIR target value and a preset SIR target downward adjustment limiting value.
In addition, before the calculating module 21 obtains the load value of the cell, the base station further includes:
and the comparison module is used for judging whether the SIR target value is adjusted downwards or not according to the SIR target value and a preset limit value of SIR target down-adjustment.
Still further, the comparing module is specifically configured to:
judging whether the SIR target value is larger than a preset SIR target down-regulation limit value or not; if the SIR target value is judged to be smaller than or equal to the limit value of the SIR target down regulation, the SIR target value is not down regulated.
If the SIR target value is judged to be larger than the limit value of the SIR target down regulation, further judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
if the acquired load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIR target value is adjusted downwards, and the SIR target value is stopped to be adjusted downwards until the adjusted SIR target value is smaller than or equal to the limit value of the SIR target value adjusted downwards;
if the load value of the acquired cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIR target value is not adjusted downwards.
In the above embodiments of the present invention, the base station includes a setting module, a calculating module, a comparing module, and a down-regulating module. Firstly, a setting module sets a threshold value of cell load, an SIR target value, a limiting value of SIR target down-regulation and a step value of SIR target down-regulation; the calculation module calculates the load value of the cell; and secondly, the comparison module compares the load value of the cell with the threshold value of the load, and compares the SIR target value with the limit value of SIR target down regulation. And finally, adjusting the SIR target value by a down-regulation module according to the comparison result.
In summary, in the uplink enhanced CELL _ FACH power control method and the base station according to the embodiments of the present invention, in the UL EFACH service state, the base station determines whether to adjust the SIR target value by comparing the acquired load value of the CELL with the preset load threshold value of the CELL.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (12)

1. A method for uplink enhanced CELL _ FACH power control, the method comprising:
judging whether the SIRtarget value is adjusted downwards or not according to the SIRtarget value and a preset SIRtarget down-adjustment limiting value, and acquiring a load value of a CELL when an uplink enhanced CELL _ FACH service is established and the SIRtarget value is judged to be larger than the SIRtarget down-adjustment limiting value; the acquiring the load value of the cell comprises: acquiring the cell load according to the unit load calculation or the selection calculation of the cable section in the cell;
adjusting the signal interference ratio SIRtarget of the uplink enhanced CELL _ FACH service according to the acquired load value of the CELL and a preset load threshold value of the CELL; and when the adjusted SIRtarget is determined to be less than or equal to the preset limit value of SIRtarget down regulation, releasing the users of the cell, thereby reducing the load value of the cell.
2. The method of claim 1, wherein the step of adjusting the signal to interference ratio target SIRtarget for the uplink enhanced CELL _ FACH service according to the obtained load value of the CELL and a preset load threshold of the CELL comprises:
judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell;
if the obtained load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIRtarget value is adjusted downwards;
if the obtained load value of the cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIRtarget value is not adjusted downwards.
3. The method of claim 2, wherein after the determining that the obtained cell load value is greater than the preset cell load threshold value and the SIRtarget value is adjusted downward, the method further comprises:
and judging whether the SIRtarget value is continuously adjusted downwards according to the adjusted SIRtarget value and the preset limit value of the SIRtarget adjusted downwards.
4. The method of claim 3, wherein the step of determining whether to continue the SIRtarget value down-regulation according to the down-regulation SIRtarget value and the preset SIRtarget down-regulation limit value comprises:
judging whether the SIRtarget value after down regulation is larger than the preset limit value of SIRtarget down regulation;
if the SIRtarget value after down regulation is judged to be larger than the preset SIRtarget down regulation limit value, continuing to down regulate the SIRtarget value until the obtained load value of the cell is smaller than or equal to the preset load threshold value of the cell, and stopping down regulating the SIRtarget value;
and stopping down-regulating the SIRtarget value if the SIRtarget value after down-regulation is judged to be less than or equal to the preset limit value of the SIRtarget down-regulation.
5. The method of claim 1, wherein the step of determining whether to adjust the SIRtarget value down according to the SIRtarget value and a preset SIRtarget down-regulation limit value comprises:
determining whether the SIRtarget value is larger than a preset SIRtarget down-regulation limit value;
if the SIRtarget value is judged to be smaller than or equal to the limit value of the SIRtarget down regulation, the SIRtarget value is not down regulated.
6. The method of claim 5, further comprising:
if the SIRtarget value is judged to be larger than the limit value of the SIRtarget down regulation, further judging whether the obtained load value of the cell is larger than the preset load threshold value of the cell;
if the obtained load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIRtarget value is adjusted downwards, and the SIRtarget value is stopped being adjusted downwards until the SIRtarget value after being adjusted downwards is smaller than or equal to the limit value of the SIRtarget downwards adjustment;
if the obtained load value of the cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIRtarget value is not adjusted downwards.
7. A base station, comprising:
the comparison module is used for judging whether the SIRtarget value is adjusted downwards or not according to the SIRtarget value and a preset SIRtarget down-adjustment limiting value;
the calculation module is used for acquiring a load value of a CELL when the uplink enhanced CELL _ FACH service is established and the SIRtarget value is judged to be larger than the limit value of SIRtarget down regulation; the acquiring the load value of the cell comprises: acquiring the cell load according to the unit load calculation or the selection calculation of the cable section in the cell;
the down-regulation module is used for regulating the signal interference ratio of the uplink enhanced CELL _ FACH service to a target value SIRtarget according to the acquired load value of the CELL and a preset load threshold value of the CELL; and when the adjusted SIRtarget is determined to be less than or equal to the preset limit value of SIRtarget down regulation, releasing the users of the cell, thereby reducing the load value of the cell.
8. The base station of claim 7, wherein the down-regulation module is specifically configured to:
judging whether the acquired load value of the cell is larger than the preset load threshold value of the cell; if the obtained load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIRtarget value is adjusted downwards; if the obtained load value of the cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIRtarget value is not adjusted downwards.
9. The base station of claim 8, wherein the down-regulation module is further configured to:
and judging whether the SIRtarget value is continuously adjusted downwards according to the adjusted SIRtarget value and the preset limit value of the SIRtarget adjusted downwards.
10. The base station of claim 9, wherein the down-regulation module is specifically configured to:
judging whether the SIRtarget value after down regulation is larger than the preset limit value of SIRtarget down regulation;
if the SIRtarget value after down regulation is judged to be larger than the preset SIRtarget down regulation limit value, continuing to down regulate the SIRtarget value until the obtained load value of the cell is smaller than or equal to the preset load threshold value of the cell, and stopping down regulating the SIRtarget value;
and stopping down-regulating the SIRtarget value if the SIRtarget value after down-regulation is judged to be less than or equal to the preset limit value of the SIRtarget down-regulation.
11. The base station of claim 7, wherein the comparing module is specifically configured to:
determining whether the SIRtarget value is larger than a preset SIRtarget down-regulation limit value; if the SIRtarget value is judged to be smaller than or equal to the limit value of the SIRtarget down regulation, the SIRtarget value is not down regulated.
12. The base station of claim 11, wherein the comparing module is further specifically configured to:
if the SIRtarget value is judged to be larger than the limit value of the SIRtarget down regulation, further judging whether the obtained load value of the cell is larger than the preset load threshold value of the cell;
if the obtained load value of the cell is judged to be larger than the preset load threshold value of the cell, the SIRtarget value is adjusted downwards, and the SIRtarget value is stopped being adjusted downwards until the SIRtarget value after being adjusted downwards is smaller than or equal to the limit value of the SIRtarget downwards adjustment;
if the obtained load value of the cell is judged to be smaller than or equal to the preset load threshold value of the cell, the SIRtarget value is not adjusted downwards.
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CN101047646A (en) * 2007-04-12 2007-10-03 中兴通讯股份有限公司 Uplink external ring power control method in high speed uplink link group access application
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