CN105848272B - A kind of inter-cell power control method and device - Google Patents
A kind of inter-cell power control method and device Download PDFInfo
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- CN105848272B CN105848272B CN201510014485.4A CN201510014485A CN105848272B CN 105848272 B CN105848272 B CN 105848272B CN 201510014485 A CN201510014485 A CN 201510014485A CN 105848272 B CN105848272 B CN 105848272B
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Abstract
This application discloses a kind of inter-cell power control method and devices, and wherein method includes: cell after receiving adjacent area overload indication information, according to the RIP information of the adjacent area overload indication information and this cell, judge whether this cell causes adjacent area interference；The cell is adjusted the PUSCH target SINR according to the principle for the Physical Uplink Shared Channel PUSCH target SINR for reducing this community user if causing adjacent area to interfere according to the judging result；The cell is when the closed power regularization condition of this community user meets, and using the current PUSCH target SINR, carries out closed power adjustment to the user.To the interference effect of adjacent cell when can reduce power control using the present invention, the overall performance of network is promoted.
Description
Technical field
The present invention relates to mobile communication technologies, more particularly to a kind of inter-cell power control method and device.
Background technique
Behavior distributed AC servo system in LTE system, Physical Uplink Shared Channel when whole network uses identical networking scheme
(PUSCH) there is more serious inter-cell interference, to influence uplink throughput.
LTE uplink power control technology sends power to user in such a way that open loop is in conjunction with closed loop and limits, and is
Control one of the important technology of inter-cell interference.In order to control inter-cell interference, existing system supports minizone transmitting overload to refer to
Show that (OI) information is adjusted for sending power to intra-cell users.Current main close-loop power control mode is by right
User receives the parameters such as Signal to Interference plus Noise Ratio (SINR) and Block Error Rate (bler) and counts, then according to statistical property to the mesh of user
Mark SINR is adjusted, to realize the adjustment for sending power to user.
Above-mentioned traditional close-loop power controlling method, due to when being adjusted to target SINR, it is not intended that minizone
Disturbed condition, and only consider the transmission performance of user, therefore, minizone may result in based on this power adjustment realized
Interference increase, to influence the overall performance of network.
Summary of the invention
In view of this, can be kept away the main purpose of the present invention is to provide a kind of inter-cell power control method and device
To the interference effect of adjacent cell when exempting from power control, the overall performance of network is promoted.
In order to achieve the above object, technical solution proposed by the present invention are as follows:
A kind of inter-cell power control method, comprising:
Cell is after receiving adjacent area overload indication information, according to the reception of the adjacent area overload indication information and this cell
Jamming power RIP information, judges whether this cell causes adjacent area interference；
The cell reduces this community user physically according to the judging result, according to if causing adjacent area to interfere
The principle of the shared channel PUSCH target SINR of row, is adjusted the PUSCH target SINR；
The cell utilizes the current PUSCH target when the closed power regularization condition of this community user meets
SINR carries out closed power adjustment to the user.
A kind of inter-cell power control device, comprising:
Judging unit is interfered, for cell after receiving adjacent area overload indication information, is overloaded and is indicated according to the adjacent area
The reception jamming power RIP information of information and this cell, judges whether this cell causes adjacent area interference；
Target SINR adjustment unit, for the cell according to the judging result, according to if causing adjacent area to interfere
The principle for reducing the Physical Uplink Shared Channel PUSCH target SINR of this community user, adjusts the PUSCH target SINR
It is whole；
Closed-loop power control unit, for the cell when the closed power regularization condition of this community user meets, using working as
The preceding PUSCH target SINR carries out closed power adjustment to the user.
In conclusion inter-cell power control method proposed by the present invention and device, do caused by adjacent area according to cell
It disturbs and is judged, and reduce PUSCH target SINR when interfering, in this way, mesh based on when carrying out close-loop power control
The disturbed condition of mark SINR and actual channel environment match, and interference of this cell to adjacent area are reduced, so as to ensure power
The effect of control alleviates the severe jamming situation of network, lifting system overall performance.
Detailed description of the invention
Fig. 1 is the method flow schematic diagram of the embodiment of the present invention one；
Fig. 2 is the apparatus structure schematic diagram of the embodiment of the present invention one.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, right below in conjunction with the accompanying drawings and the specific embodiments
The present invention is described in further detail.
Whether core of the invention thought is: being that interference source is small to this cell according to the interference information of adjacent area and this cell
Area is judged, according to the judgment result, adjusts the target SINR of user, when so that inter-cell interference is big, reduces target SINR.
In this way, when inter-cell interference is big, the target SINR of user can be reduced, so as to reduce the transmission power of user, Jin Erke
To reduce system interference, systematic entirety energy is improved.
Fig. 1 is the method flow schematic diagram of the embodiment of the present invention one, as shown in Figure 1, the embodiment specifically includes that
Step 101, cell are small with this according to the adjacent area overload indication information after receiving adjacent area overload indication information
Reception jamming power (Received Interference Power, the RIP) information in area, judges whether this cell causes neighbour
Area's interference.
This step, for determining whether cell causes adjacent area interference, if it is, needing in the next steps to cell
PUSCH target SINR be adjusted, to reduce interference of this cell to adjacent area, alleviate the uplink severe jamming situation of system,
Lifting system overall performance.
In existing system, the adjacent area of cell can send adjacent area overload instruction to the cell according to certain report cycle
Information.In this way, can determine that the disturbed condition of adjacent cell, into one according to the adjacent area overload indication information in this step
Step ground can determine the overall interference situation of cell in conjunction with the disturbed condition of this cell.
Preferably, can judge whether this cell causes adjacent area interference using following methods:
Step 1011, according to the adjacent area overload indication information, calculate the high interference resource block ratio value of adjacent cell
OIneighb_cell；According to the RIP information, the high interference resource block ratio value RIP of this cell is calculatedown_cell。
What needs to be explained here is that the reception jamming power that cell can be current by each resource block of this cell in existing system
RIP is compared with interference threshold value, obtains the current disturbance state of each resource block, by the disturbance state information of each resource block
(as overload indication information) is notified to adjacent area.In this way, after cell receives adjacent area overload indication information, it can be according to the letter
Breath counts the resource block of high interference resource block quantity and adjacent cell sum in adjacent cell, and the two, which is divided by, can be obtained adjacent cell
High interference resource block ratio value OIneighb_cell。
Correspondingly, as described in upper section, cell is by the current RIP information of resource block each in this cell and an interference threshold value
It is compared, can know the disturbance state of each resource block, it can determine whether each resource block is high interference resource
Block, and then the resource block of high interference resource block quantity and this cell sum in this cell can be counted, then the two is compared,
Obtain the high interference resource block ratio value RIP of this cellown_cell。
Step 1012, according to Icell_OI_state=alfa × OIneighb_cell+(1-alfa)×RIPown_cell, it is small to calculate this
The interference shape state value I in areacell_OI_state。
Wherein, alfa is filtering factor, and value range is (0,1), and those skilled in the art can examine according to actual needs
Suitable alfa is arranged in the disturbed condition for considering this cell and adjacent cell.
This step, in the interference shape state value I for calculating this cellcell_OI_stateWhen, while considering the high interference of adjacent cell
Resource block ratio value OIneighb_cellWith the high interference resource block ratio value RIP of this cellown_cell, therefore, can effectively ensure
Calculate the interference shape state value I of this cellcell_OI_stateAccuracy.
Step 1013, according to the Icell_OI_stateWith preset interference threshold value, determine whether this cell is interference source
Cell.
This step, for the sake of simplicity, only can judge whether cell is dry using a pre-set interference threshold value
Disturb source cell.That is Icell_OI_stateIt then can determine this cell for interference source cell when greater than the interference threshold value.
Preferably, in order to avoid the ping-pong adjusted repeatedly two threshold parameters can be introduced, to determine cell
Disturbed condition, i.e., the described interference threshold value may include two parameters of high interference threshold value and low interference threshold value, high interference door
Limit value is greater than the low interference threshold value, only can then determine that this cell is that interference source is small when being greater than high interference threshold value
Area.
Preferably, being based on above-mentioned two thresholding, following methods can be used to determine this cell whether for interference source cell:
As the Icell_OI_stateWhen greater than the high interference threshold value, this cell is determined to interfere source cell；
As the Icell_OI_stateWhen less than the low interference threshold value, determine that this cell is small for non-interference source low-power
Area.
In the above method, as the Icell_OI_stateWhen between high interference threshold value and low interference threshold value between the two,
It it is considered that not needing to be adjusted PUSCH target SINR according to the current disturbed condition of cell, and is interference source in cell
When cell or non-interference source low power cell, then need in the next steps to be adjusted its PUSCH target SINR, so that
PUSCH target SINR is more matched with actual channel circumstance, so as to ensure the validity of power control.
The specific size of above-mentioned high interference threshold value and low interference threshold value can be by those skilled in the art according to practical need
It is configured, details are not described herein.
Step 102, the cell reduce this community user according to if causing adjacent area to interfere according to the judging result
Physical Uplink Shared Channel (PUSCH) target SINR principle, the PUSCH target SINR is adjusted.
Here, when determining that cell causes adjacent area to interfere in step 101, PUSCH target SINR is reduced in this step, this
Sample, PUSCH target SINR can be lower based in close-loop power control, so, it is possible to reduce community user uplink is sent
Power is so as to reducing this cell to the interference effect of adjacent area, lifting system overall performance.
Preferably, can introduce cell-level parameter in PUSCH target SINR will pass through when carrying out the adjustment here
The adjustment to match with disturbed condition is carried out to the cell-level parameter, so that PUSCH target SINR more meets actual channel matter
Amount.Specifically, following methods can be used, realize this purpose:
The PUSCH target SINRue_pusch_targetEqual to inter-cell power control parameter g (Icell_OI_state) and user
Grade power contorl parameters f (PHRue_currentThe sum of).
When judging cell in step 1013 to interfere source cell or non-interference source low power cell, correspondingly, to institute
Stating the PUSCH target SINR progress adjustment includes:
When the cell is interference source cell, by the g (Icell_OI_state) lower a default downward step-length a；
When the cell is non-interference source low power cell, by the g (Icell_OI_state) up-regulation one default up-regulation
Step-length b.
In above-mentioned steps, the specific value size that a and b are all larger than zero, a and b can be by those skilled in the art according to reality
It needs to be configured.
Step 103, the cell are when the closed power regularization condition of this community user meets, described in current
PUSCH target SINR carries out closed power adjustment to the user.
This step, based on the base for causing disturbed condition progress PUSCH target SINR adjustment in adjacent area in step 102 according to cell
On plinth, then when needing close-loop power control, corresponding closed power adjustment process is triggered.The specific implementation of this step compared with
System, details are not described herein.
What needs to be explained here is that due to the foundation of close-loop power control: PUSCH target SINR, in a step 102 into
Go the adjustment to match with network interferences situation, thereby it can be assured that the validity of close-loop power control, while can reduce
Interference of this cell to adjacent area, and then the uplink interference of system can be effectively relieved.
Fig. 2 is the inter-cell power control apparatus structure schematic diagram corresponded to the above method, as shown in Fig. 2, the device
Include:
Judging unit is interfered, for cell after receiving adjacent area overload indication information, is overloaded and is indicated according to the adjacent area
The RIP information of information and this cell, judges whether this cell causes adjacent area interference.
Target SINR adjustment unit, for the cell according to the judging result, according to if causing adjacent area to interfere
The principle for reducing the Physical Uplink Shared Channel PUSCH target SINR of this community user, adjusts the PUSCH target SINR
It is whole.
Closed-loop power control unit, for the cell when the closed power regularization condition of this community user meets, using working as
The preceding PUSCH target SINR carries out closed power adjustment to the user.
Preferably, the interference judging unit, for calculating the high level cadre of adjacent cell according to the adjacent area overload indication information
Disturb resource block ratio value OIneighb_cell；According to the RIP information, the high interference resource block ratio value of this cell is calculated
RIPown_cell；According to Icell_OI_state=alfa × OIneighb_cell+(1-alfa)×RIPown_cell, calculate the interference of this cell
State value Icell_OI_state；Wherein, the value range of alfa is (0,1)；According to the Icell_OI_stateWith preset interference threshold
Value determines whether this cell is interference source cell.
Preferably, the interference threshold value includes high interference threshold value and low interference threshold value, the high interference threshold value
Greater than the low interference threshold value, the interference judging unit, for working as the Icell_OI_stateGreater than the high interference thresholding
When value, this cell is determined to interfere source cell；As the Icell_OI_stateWhen less than the low interference threshold value, this cell is determined
For non-interference source low power cell.
Preferably, the PUSCH target SINRue_pusch_targetFor inter-cell power control parameter g (Icell_OI_state) and
User class power contorl parameters f (PHRue_currentThe sum of)；
The target SINR adjustment unit is used for when the cell is interference source cell, by the g (Icell_OI_state)
Lower a default downward step-length a；When the cell is non-interference source low power cell, by the g (Icell_OI_state) on
Adjust a default up-regulation step-length b；The a and b are all larger than zero.
In conclusion the above is merely preferred embodiments of the present invention, being not intended to limit the scope of the present invention.
All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention
Within protection scope.
Claims (6)
1. a kind of inter-cell power control method characterized by comprising
Cell is interfered after receiving adjacent area overload indication information according to the reception of the adjacent area overload indication information and this cell
Power RIP information, judges whether this cell causes adjacent area interference；
The cell is total according to the physical uplink for reducing this community user if causing adjacent area to interfere according to the judging result
The principle for enjoying channel PUSCH target Signal to Interference plus Noise Ratio SINR is adjusted the PUSCH target SINR；
The cell is when the closed power regularization condition of this community user meets, using the current PUSCH target SINR,
Closed power adjustment is carried out to the user；
Wherein, described to judge whether this cell causes adjacent area interference and include:
According to the adjacent area overload indication information, the high interference resource block ratio value OI of adjacent cell is calculatedneighb_cell；According to described
RIP information calculates the high interference resource block ratio value RIP of this cellown_cell；
According to Icell_OI_state=alfa × OIneighb_cell+(1-alfa)×RIPown_cell, calculate the interference shape state value of this cell
Icell_OI_state；Wherein, the value range of alfa is (0,1)；
According to the Icell_OI_stateWith preset interference threshold value, determine whether this cell is interference source cell.
2. the method according to claim 1, wherein the interference threshold value includes high interference threshold value and low dry
Threshold value is disturbed, the high interference threshold value is greater than the low interference threshold value, and whether described this cell of determination is interference source cell
Include:
As the Icell_OI_stateWhen greater than the high interference threshold value, this cell is determined to interfere source cell；
As the Icell_OI_stateWhen less than the low interference threshold value, determine this cell for non-interference source low power cell.
3. according to the method described in claim 2, it is characterized in that, the PUSCH target SINR is inter-cell power control ginseng
Number g (Icell_OI_state) and user class power contorl parameters f (PHRue_currentThe sum of)；
Described be adjusted to the PUSCH target SINR include:
When the cell is interference source cell, by the g (Icell_OI_state) lower a default downward step-length a；
When the cell is non-interference source low power cell, by the g (Icell_OI_state) up-regulation one default up-regulation step-length b；
The a and b are all larger than zero.
4. a kind of inter-cell power control device characterized by comprising
Judging unit is interfered, for cell after receiving adjacent area overload indication information, according to the adjacent area overload indication information
With the reception jamming power RIP information of this cell, judge whether this cell causes adjacent area interference；Wherein it is described judgement include:
According to the adjacent area overload indication information, the high interference resource block ratio value OI of adjacent cell is calculatedneighb_cell；According to the RIP
Information calculates the high interference resource block ratio value RIP of this cellown_cell；According to Icell_OI_state=alfa × OIneighb_cell+
(1-alfa)×RIPown_cell, calculate the interference shape state value I of this cellcell_OI_state；Wherein, the value range of alfa be (0,
1)；According to the Icell_OI_stateWith preset interference threshold value, determine whether this cell is interference source cell；
Target SINR adjustment unit is reduced for the cell according to the judging result according to if causing adjacent area to interfere
The principle of the Physical Uplink Shared Channel PUSCH target SINR of this community user, is adjusted the PUSCH target SINR；
Closed-loop power control unit, for the cell when the closed power regularization condition of this community user meets, using current
The PUSCH target SINR carries out closed power adjustment to the user.
5. device according to claim 4, which is characterized in that the interference threshold value includes high interference threshold value and low dry
Threshold value is disturbed, the high interference threshold value is greater than the low interference threshold value, the interference judging unit, for when described
Icell_OI_stateWhen greater than the high interference threshold value, this cell is determined to interfere source cell；As the Icell_OI_stateLess than institute
When stating low interference threshold value, determine this cell for non-interference source low power cell.
6. device according to claim 5, which is characterized in that the PUSCH target SINR is inter-cell power control ginseng
Number g (Icell_OI_state) and user class power contorl parameters f (PHRue_currentThe sum of)；
The target SINR adjustment unit is used for when the cell is interference source cell, by the g (Icell_OI_state) lower
One default downward step-length a；When the cell is non-interference source low power cell, by the g (Icell_OI_state) up-regulation one
A default up-regulation step-length b；The a and b are all larger than zero.
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