WO2015149665A1 - 功率控制方法和装置 - Google Patents

功率控制方法和装置 Download PDF

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Publication number
WO2015149665A1
WO2015149665A1 PCT/CN2015/075374 CN2015075374W WO2015149665A1 WO 2015149665 A1 WO2015149665 A1 WO 2015149665A1 CN 2015075374 W CN2015075374 W CN 2015075374W WO 2015149665 A1 WO2015149665 A1 WO 2015149665A1
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level
interference threshold
information
neighboring
iot
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French (fr)
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王东锋
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/146—Uplink power control

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  • the present application relates to the field of communications technologies, and in particular, to a power control method and apparatus.
  • the base station controls the uplink transmit power of the user equipment (User Equipment, UE) in the cell, and the common control method is to perform signal noise on the target signal under different path loss. It is implemented by setting different values than (SINRTarget), wherein the setting of SINRTarget includes:
  • the P o_pusch is a physical uplink shared channel (PUSCH) expected received power
  • ⁇ represents a partial path loss compensation factor, which is set by the network side
  • PL is a path loss between the base station and the UE.
  • Noise Figure is the noise figure
  • ITh is the set interference threshold
  • I is the interference
  • N is the noise.
  • the base station After determining the SINRTarget, the base station compares the actually measured Signal Interference and Noise Ratio (SINR) with the SINR Target. If the actually measured SINR is greater than the SINR Target, the power control command word is transmitted to reduce the PUSCH uplink transmit power of the UE. Otherwise The power control command word is sent to improve the PUSCH transmit power of the UE, thereby implementing uplink power control for the UE.
  • SINR Signal Interference and Noise Ratio
  • the LTE system basically adopts the same-frequency networking.
  • the uplink transmit power of the UE may cause co-channel interference to neighboring cells and reduce communication quality.
  • the technical problem to be solved by the present application is to provide a power control method and apparatus, which can reduce interference caused by uplink transmit power of a UE to a neighboring area.
  • the present application discloses a power control method, including: receiving information sent by a neighboring base station to indicate a neighboring area interference noise ratio IOT level; and using information indicating a neighboring area IOT level to adjust a user in the cell.
  • the interference threshold of the UE determining the target signal to interference and noise ratio of the UE according to the interference threshold; and controlling the uplink power of the UE by using the target signal to interference and noise ratio.
  • the present application further discloses a power control apparatus, including: a receiving unit configured to receive information sent by a neighboring base station for indicating a level of an IOT in a neighboring area; and an adjusting unit configured to use a level indicating an IOT of the neighboring area
  • the information is used to adjust the interference threshold of the user equipment UE in the cell;
  • the determining unit is configured to determine the target signal to interference and noise ratio of the UE according to the interference threshold;
  • the control unit is configured to control the uplink power of the UE by using the target signal to interference and noise ratio .
  • the present application further discloses a computer program comprising computer readable code which, when run on a base station, causes the base station to perform the power control method described above.
  • the present application discloses a computer readable medium in which the above computer program is stored.
  • the SINRTarget is determined according to the IOT level of the neighboring cell. Therefore, the determined SINRTarget is taken into account the actual interference level of the network, and the uplink power obtained according to this is also adapted to the interference level of the neighboring cell, so The interference of the uplink power to the neighboring area is reduced, and the communication quality is improved.
  • FIG. 1 is a schematic diagram of a cell network of an LTE system
  • FIG. 2 is a flowchart of a power control method according to Embodiment 1 of the present invention.
  • FIG. 3 is a flowchart of a method for determining a new interference threshold for an edge UE according to Embodiment 2 of the present invention
  • FIG. 4 is a flowchart of a method for determining a new interference threshold for a central UE according to Embodiment 2 of the present invention
  • Figure 5 is a block diagram showing the structure of a power control apparatus according to a third embodiment of the present invention.
  • FIG. 6 is a block diagram showing a preferred structure of a power control device according to a third embodiment of the present invention.
  • Figure 7 is a block diagram of a base station for performing a method in accordance with the present invention, in accordance with an embodiment of the present invention.
  • FIG. 8 is a memory unit for holding or carrying program code implementing a method in accordance with the present invention, in accordance with an embodiment of the present invention.
  • the transmit power of the user in the local area cannot be adjusted according to the actual interference level of the neighboring area.
  • FIG. 1 it is assumed that a user A in the cell 0 is in the edge overlap region of the cell 0, 2, and 3.
  • the SINRTarget of the user A is a fixed value, and the base station according to the base station The SINRTarget adjusts the transmit power of the user A.
  • the user A transmit power (or SINRTarget) needs to be reduced to reduce user interference in the cells 2 and 3; or When there are no users in the cells 2 and 3 or the interference level is low, the transmission power (or SINRTarget) of the user A can be completely increased, thereby increasing the uplink throughput of the user A.
  • the present application considers the uplink interference level of the neighboring area in the uplink power control processing, and determines which users cause interference to the neighboring area according to the A3 event, and when the interference level of the neighboring area is high, Users in the area that may cause interference to the neighboring area reduce the uplink transmit power. When the neighboring area has low interference or there is no user in the neighboring area, the uplink transmit power of the users in the area is increased.
  • the implementation process of the present application will be specifically described below.
  • a power control method is provided.
  • the method may be performed by a base station, and is used to control uplink power of a UE in a cell managed by a base station, where the method includes:
  • Step 202 Receive information that is sent by a neighboring base station and is used to indicate an Interference Over Temperature (IOT) level.
  • IOT Interference Over Temperature
  • the base station of the local cell receives information for indicating the level of the IOT of the neighboring area sent by the neighboring base station through the X2 port, and the information indicating the level of the IOT of the neighboring area may be a newly added information element (IE).
  • the information indicating the level of the adjacent area IOT may be periodically sent by the neighboring base station.
  • the local cell may also send information indicating the IOT level of the neighboring cell to the neighboring cell, where sending the information indicating the IOT level of the neighboring cell to the neighboring cell may be implemented by: determining the cell at the end of the current period.
  • the IOT level is determined according to the correspondence between the IOT level and the level information of the interference level, and the level information of the interference level of the current cell in the current period is determined; at the beginning of the next period, the IOT is sent to the neighboring base station to indicate the local area.
  • Level information wherein the information of the IOT level of the current cell includes: level information of the interference level of the current cell.
  • the corresponding relationship between the IOT level and the level information of the interference level may be implemented by using a mapping table, or may be implemented by other corresponding methods, which is not limited in this application.
  • the current cell may send information indicating the IOT level of the local cell to other cells.
  • the neighboring area may send information indicating the level of the IOT of the neighboring cell to the local cell in a similar manner. This will not be repeated here.
  • the information indicative of the level of the adjacent zone IOT includes level information used to characterize the level of interference in the neighborhood.
  • the level information is first level information, second level information or third level information; wherein the first level information indicates that the neighboring area IOT level is greater than or equal to the first threshold; the second level information indicates that the neighboring area IOT level is greater than or The second threshold is equal to the second threshold and is smaller than the second threshold; the third level information indicates that the neighboring area IOT level is less than the second threshold, the neighboring area has no user access, or the neighboring area has no uplink service, where the first threshold is greater than the second threshold.
  • the neighboring area IOT level is divided into three grades, and the neighboring cell base station determines which level of the neighboring area IOT level of the neighboring area where the base station is located, and sends the information corresponding to the grade to the neighboring cell through the X2 port. a base station, so that the base station of the neighboring cell adjusts the uplink transmit power of the UE according to the IOT level of the neighboring cell. For example, when the neighboring cell base station determines that the neighboring IOT level of the neighboring cell where the base station is located meets the second threshold and is less than the first threshold, The second level information is sent to the base station of the neighboring cell.
  • Step 204 Adjust the interference threshold of the UE in the local cell by using information indicating the level of the IOT of the neighboring cell.
  • the base station when determining that the received information indicating the level of the neighboring IOT includes the first level information and the interference threshold of any UE in the current cell is less than the maximum interference threshold, the base station may increase the UE.
  • the interference threshold (ITh) when determining that the received information indicating the IOT level of the neighboring area includes the third level information and the interference threshold of a certain UE in the current cell is greater than the minimum interference threshold, the base station lowers the interference threshold of the UE.
  • the base station increases the interference threshold of the UE, thereby reducing the uplink transmit power of the UE, and reducing the uplink.
  • the base station reduces the interference threshold of the UE, thereby improving the uplink transmit power of the UE, The area causes strong interference and improves the communication quality of the community.
  • the interference threshold adjustment of each UE may be separately performed according to different locations of the UE.
  • the maximum interference threshold when the UE is located in an edge region of the cell, the maximum interference threshold is the first maximum interference threshold; and the minimum interference threshold is the first minimum interference threshold. Value; when the UE is located in the central area of the cell, the maximum interference threshold is the second maximum interference threshold, and the minimum interference threshold is the second minimum interference threshold; wherein the second maximum interference threshold is greater than the first maximum interference
  • the threshold value, the second minimum interference threshold is greater than the second minimum interference threshold. Since the threshold value of the central area is higher than that of the edge area, since the threshold value and the transmission power are inversely proportional, the transmission power of the edge area is high, and the communication quality of the edge area is ensured.
  • the base station receives the A3 event reported by the UE, where the A3 event includes the neighboring cell information of the UE, according to which the UE is located in the cell edge region, and the interfering UE is determined according to the neighbor information.
  • the neighboring cell identifier is adjusted according to the information of the IOT level of the neighboring cell corresponding to the neighboring cell identifier, and the interference threshold of the UE in the cell is adjusted.
  • the base station can adjust the interference threshold of the UE by using the neighboring area corresponding to the UE in the edge area, so that the adjustment is more targeted.
  • the interference threshold is adjusted in the following manner: for any UE located in the edge region of the local cell, when corresponding to the UE
  • the information indicating the level of the IOT of the neighboring area sent by the neighboring area includes the first level information, and when the sum of the interference threshold of the UE and the first step is smaller than the first maximum interference threshold, the UE is adjusted by the first step.
  • the interference threshold, the information indicating the level of the IOT of the neighboring area sent by the neighboring cell corresponding to the UE includes the first level information, and the sum of the interference threshold of the UE and the first step is greater than or equal to the first maximum interference threshold.
  • the interference threshold of the UE is kept unchanged; and the neighboring area IOT level sent by the neighboring area corresponding to the UE is displayed.
  • the information includes the third level information, and when the difference between the interference threshold of the UE and the second step is greater than the first minimum interference threshold, the interference threshold of the UE is lowered in the second step, and the neighboring area of the UE is reported.
  • the information indicating the IOT level of the neighboring area includes the third level information, and when the difference between the interference threshold of the UE and the second step is less than or equal to the first minimum interference threshold, the UE is adjusted.
  • the uplink transmit power of the UE at the cell edge is adjusted, and the UE at the cell edge is closer to the neighboring cell, which is likely to cause co-channel interference to the neighboring cell.
  • the uplink transmit power of the UE at the cell edge is adjusted.
  • the interference threshold is increased to reduce the uplink transmit power of the UE and reduce the interference to the neighboring area;
  • the interference threshold is lowered, so as to improve the uplink transmit power of the UE, and improve the communication quality of the UE while not causing strong interference to the neighboring area.
  • the interference threshold when the UE is located in the central area of the current cell, the interference threshold is adjusted in the following manner: for any UE located in the central area of the cell, when the neighboring cell receives the neighbor indication
  • the information of the area IOT level includes the first level information
  • the interference threshold of the UE is raised in the third step, when the cell
  • the received information indicating the level of the IOT of the neighboring cell includes the first level information
  • the interference threshold of the UE and the third step is greater than or equal to the second maximum interference threshold
  • the interference threshold of the UE is adjusted to be the second
  • Max means taking the maximum value.
  • This embodiment is mainly for adjusting the uplink transmit power of the UE in the central area, and the UE in the central area is far away from the neighboring area, and it is not easy to cause the same-frequency interference to the neighboring area. Therefore, when the neighboring area interference is not too high, the interference is reduced.
  • Threshold in order to improve the uplink transmit power of the UE, improve the communication quality of the UE while not causing strong interference to the neighboring area; when the neighboring area is high, it is necessary to increase the interference threshold, so as to reduce the UE transmit power, Small disturbances to neighboring areas.
  • Step 206 Determine a target signal to interference and noise ratio of the UE according to the interference threshold.
  • P o_pusch is the expected reception power of the PUSCH
  • ⁇ represents the partial path loss compensation factor, which is set by the network side
  • PL is the path loss between the base station and the UE.
  • Noise Figure is the noise figure and ITh is the set interference threshold.
  • the SINRTarget is calculated according to the interference threshold determined in step 204.
  • Step 208 Control the uplink power of the UE by using a target signal to interference and noise ratio.
  • the base station After determining the SINRTarget, the base station compares the actually measured SINR with the SINRTarget. If the actually measured SINR is greater than the SINRTarget, the power control command word is transmitted to reduce the PUSCH uplink transmit power of the UE, otherwise the power control command word is sent to improve the PUSCH of the UE. Transmit power to achieve uplink power control for the UE.
  • the SINRTarget is determined according to the IOT level of the neighboring cell. Therefore, the determined SINRTarget is taken into account the actual interference level of the network, and the uplink power obtained according to this is also adapted to the interference level of the neighboring cell, so The interference of the uplink power to the neighboring area is reduced, and the communication quality is improved.
  • the present application also provides a method for controlling uplink power, which can be combined with the method in the above embodiments without contradiction.
  • the method described in this embodiment will be specifically described below.
  • the base station of each cell periodically measures the uplink IOT level of the current cell, and sends the measurement result to the base station in the same frequency neighboring area through the X2 interface, and the uplink IOT level can be added by adding an X2 message loading information (LOAD INFORMATION). Characterized by a 2-bit IE (eg, UL Interference over Thermal Level), as shown in Tables 1 and 2.
  • LOAD INFORMATION X2 message loading information
  • the IOT level indicates the average interference level of all PRBs in the uplink of the cell. As shown in the above table, the IOT level can be divided into three levels: high, medium, and low.
  • the high interference corresponds to the first level information in the previous embodiment.
  • the interference corresponds to the second level information in the previous embodiment, and the low interference corresponds to the third level information in the previous embodiment.
  • the specific interference level can be determined by:
  • the base station side measures the total interference power (including thermal noise) of all PUSCHs in each uplink subframe in the measurement period, and calculates the thermal noise power (No x W), where No represents the uplink carrier.
  • the white noise power spectral density of the frequency, W indicates that the uplink PUSCH occupies the PRB bandwidth, calculates the ratio of the total interference power and the thermal noise power, and takes the dB value, that is, the uplink IOT of each subframe, and averages all IOTs in one measurement period ( Direct averaging or recursion is the average IOT over a period. In this way, the base station obtains the average IOT of the cell.
  • set the IOT level When there is no access user in the cell or no uplink service, set the IOT level to low interference.
  • the average IOT level in a certain period is ⁇ TH2, set the IOT level to low interference.
  • TH2 ⁇ the average IOT level in a certain period ⁇ TH1 set the IOT level to medium interference; when the average IOT level ⁇ TH1 in a certain period, set the IOT level to high interference.
  • the correspondence between the above-mentioned IOT level and the level information of the interference level can be reflected in the form of a mapping table.
  • the base station determines the IOT level of the current cell at the end of the current period; determines the level information of the interference level of the current cell in the current period according to the correspondence between the IOT level and the level information of the interference level; at the beginning of the next period, the neighboring area
  • the area base station sends information indicating the IOT level of the local cell.
  • the information about the IOT level of the neighboring area sent by the neighboring base station is received by the X2 port, and the information indicating the level of the IOT of the neighboring area may be a new IE.
  • the information indicating the level of the IOT of the neighboring cell may be periodically sent by the neighboring cell base station, where the information of the IOT level of the local cell includes: the level information of the interference level of the local cell.
  • the correspondence between the IOT level and the level information of the interference level can also be implemented by other corresponding methods, which is not limited in this application.
  • the base station configures an A3 event for the UE, and configures the Leave Report (ReportOnLeave) to be true (True), that is, the measurement report is to be reported when the A3 event leaving condition is met.
  • the A3 event should be earlier than the A3 event that the user switches, and is used to determine whether the user is a central user or an edge user.
  • the user who enters the A3 event is an edge user, and the user who does not enter the A3 event is the center user. That is, the UEs that have low communication quality but fail to reach the required handover cell can perform power adjustment by the method to improve the communication quality.
  • the A3 event indicates that the quality of service in the neighboring cell is better than that of the serving cell (the cell), and is a value to be used by the terminal in the process of inter-cell handover.
  • the UE When the following inequality A3-1 is satisfied, the UE considers that the entry condition of the A3 event is satisfied:
  • Mn is the measurement result of the neighboring region without considering any offset
  • Ofn is the frequency-specific offset of the neighboring cell
  • Ocn is the cell-specific offset of the neighboring cell, and if not configured for the neighboring cell, it is set to Zero
  • Ms is the measurement result of the serving cell without calculating any offset
  • Ofs is the frequency-specific offset on the serving frequency
  • Ocs is the cell-specific offset of the serving cell, and if not configured for the serving cell, the value is set to 0.
  • Hys is the hysteresis parameter of the event; Off is the offset parameter of the event; Mn, Ms are in dBm when RSRP is indicated, or dB is when RSRQ is indicated; Ofn, Ocn, Ofs, Ocs, Hys, Off are dB.
  • IThNew is the ITh used to calculate the SINRTarget for this period.
  • IThO1d calculates the ITh of the SINRTarget for the user in the previous period.
  • the user at the edge location and the UE at the central location calculate the ITh at the time the cycle arrives.
  • FIG. 3 is a flow chart of a method for determining ITh for an edge location UE, as shown in FIG. 3, the method includes:
  • Step 302 Set an initial value of ITh of all users in the cell to an initial value of ITh (IThInitial).
  • step 304 it is determined whether the IOT level message of the neighboring area of the A3 event reported by the edge location UE is received. If yes, step 306 is performed; otherwise, step 314 is performed.
  • the A3 event includes the neighboring area information of the UE, and the base station may know that the UE is located in the cell edge area, and may determine the neighboring area identifier of the interfering UE according to the neighboring area information, and then, according to the neighboring area corresponding to the neighboring area identifier,
  • the IOT level information is used to adjust the interference threshold of the UE in the cell. For details, see steps 306-316.
  • Step 306 determining whether the UE reports a high interference level cell in the neighboring area of the A3 event, that is, determining whether the IOT level of the neighboring area of the UE is greater than or equal to TH1, and if yes, executing step 308, otherwise performing step 310;
  • Step 308 obtaining a new interference threshold by the following formula:
  • IThNew min(IThOld+IThUpStepSize, IThmaxEdge);
  • IThUpStepSize is the step size for adjusting the interference threshold upwards
  • IThmaxEdge is the maximum interference threshold in the edge region
  • min is the minimum value.
  • Step 310 Determine whether the neighboring area of the A3 event reported by the UE is all the medium interference level cell, that is, whether the IOT level of the neighboring area of the UE is greater than or equal to Th2 and less than Th1, and if yes, perform step 312, otherwise , performing step 314;
  • a new interference threshold is obtained by the following formula:
  • Step 314 If the IOT level message of the neighboring cell is not received or the neighboring cell reporting the A3 event of the UE is a cell with a low interference level, that is, the IOT level of the neighboring cell of the UE is less than Th2, the following formula is used to obtain a new one. Interference threshold:
  • IThNew max(IThOld-IThDwStepSize, IThminEdge).
  • IThDwStepSize is the step size for adjusting the interference threshold downward
  • IThminEdge is the minimum interference threshold in the edge region
  • max is the maximum value
  • Step 316 updating the SINRtarget with a new interference threshold.
  • FIG. 4 is a flow chart of a method for determining ITh for a central location UE, as shown in FIG. 4, the method includes:
  • Step 402 Set an initial value of ITh of all users in the cell to an initial value of ITh (IThInitial).
  • Step 404 it is determined whether the IOT level message of the neighboring area is not received, or there is no high interference level in the IOT level message of the neighboring area (the received IOT level of the neighboring area is less than Th1), and if yes, step 406 is performed. Otherwise, step 408 is performed;
  • a new interference threshold is obtained by the following formula:
  • IThNew max(IThOld-IThDwStepSize, IThmincenter);
  • IThDwStepSize is the step size for adjusting the interference threshold downward
  • IThmincenter is the minimum interference threshold in the central region
  • max is the maximum value
  • a new interference threshold is obtained by the following formula:
  • IThNew min(IThOld+IThUpStepSize, IThmaxcenter);
  • IThUpStepSize is the step size to adjust the interference threshold upward
  • IThmaxcenter is the maximum interference threshold in the central area
  • min is the minimum value.
  • Step 410 updating the SINRtarget with a new interference threshold.
  • the Thmaxcenter, the IThmincenter, the IThmaxEdge, and the IThminEdge are all configured by the base station. Since the central user has less interference to the neighboring cell, the configuration threshold for the central user ITh is higher than that of the edge user, that is, IThmaxcenter>IThmaxEdge, IThmincenter>IThminEdge. Since the threshold value of the central area is higher than that of the edge area, since the threshold value and the transmission power are inversely proportional, the transmission power of the edge area is high, and the communication quality of the edge area is ensured.
  • the base station determines the latest IThNew for each UE, and uses the interference threshold to obtain a new SINRTarget for the UE.
  • the base station finally performs power control on the UE according to the new SINRTarget.
  • the present application provides a power control device, which may be a base station or a device disposed in a base station, and the device may be used to implement the foregoing method embodiments. Features can be applied to this embodiment.
  • the device includes:
  • the receiving unit 502 is configured to receive information sent by the neighboring base station to indicate the level of the IOT of the neighboring area;
  • the adjusting unit 504 is configured to adjust the interference threshold of the UE in the local cell by using information indicating a level of the IOT of the neighboring cell;
  • the determining unit 506 is configured to determine a target signal to interference and noise ratio of the UE according to the interference threshold.
  • the control unit 508 is configured to control the uplink power of the UE by using a target signal to interference and noise ratio.
  • the information indicative of the level of the adjacent zone IOT includes level information used to characterize the level of interference in the neighborhood.
  • the level information is: first level information, second level information, or third level information; wherein the first level information indicates that the neighboring area IOT level is greater than or equal to the first threshold; The second level information indicates that the neighboring IOT level is greater than or equal to the second threshold and is less than The first threshold is used; the third level information indicates that the neighboring area IOT level is less than the second threshold, the neighboring area has no user access, or the neighboring area has no uplink service, wherein the first threshold is greater than the second threshold.
  • the adjusting unit 502 is configured to:
  • the interference threshold of the UE is raised;
  • the interference threshold of the UE is lowered.
  • the maximum interference threshold when the UE is located in an edge region of the cell, the maximum interference threshold is the first maximum interference threshold; the minimum interference threshold is the first minimum interference threshold; when the UE is located in the cell In the central area, the maximum interference threshold is the second maximum interference threshold, and the minimum interference threshold is the second minimum interference threshold; wherein the second maximum interference threshold is greater than the first maximum interference threshold, and the second minimum The interference threshold is greater than the second minimum interference threshold.
  • the receiving unit 502 is further configured to receive an A3 event reported by the UE, where the A3 event includes neighboring cell information of the UE, and the determining unit 506 is further configured to determine, according to the neighboring cell information, the interfering UE.
  • the neighboring cell identifier; the adjusting unit 504 is configured to adjust the interference threshold of the UE in the cell according to the information of the IOT level of the neighboring cell corresponding to the neighboring cell identifier.
  • the adjusting unit 504 when the UE is located in an edge region of the local cell, the adjusting unit 504 is further configured to:
  • the information indicating the level of the IOT of the neighboring area sent by the neighboring cell corresponding to the UE includes the first level information, and the sum of the interference threshold of the UE and the first step is smaller than
  • the interference threshold of the UE is increased by the first step, and the information indicating the IOT level of the neighboring area sent by the neighboring area corresponding to the UE includes the first level information, and the UE
  • the interference threshold of the UE is adjusted to be the first maximum interference threshold
  • the interference threshold of the UE is kept unchanged
  • the second step is to adjust the interference threshold of the UE.
  • the information indicating the IOT level of the neighboring area reported by the neighboring cell of the UE includes the third level information, and the difference between the interference threshold of the UE and the second step is less than or equal to the first.
  • the interference threshold of the UE is adjusted to be the first minimum interference threshold.
  • the adjusting unit 504 when the UE is located in a central area of the local cell, the adjusting unit 504 is further configured to:
  • the information indicating the IOT level of the neighboring cell received by the local cell includes the first level information, and the sum of the interference threshold of the UE and the third step is smaller than the second maximum interference threshold.
  • the interference threshold of the UE is increased in the third step, and the information indicating the IOT level of the neighboring cell received by the local cell includes the first level information, and the sum of the interference threshold of the UE and the third step is greater than or
  • the interference threshold of the UE is adjusted to be a second maximum interference threshold;
  • the fourth The step size is used to lower the interference threshold of the UE; the information indicating the IOT level of the neighboring cell received by the local cell includes the second level information or the third level information, and the difference between the interference threshold of the UE and the fourth step is less than or equal to
  • the interference threshold of the UE is adjusted to be a second minimum interference threshold.
  • the receiving unit 502 is further configured to receive, by using the X2 interface, information sent by the neighboring base station to indicate the level of the neighboring IOT.
  • control unit 508 is further configured to control the uplink power of the physical uplink shared channel PUSCH of the UE using the target signal to interference and noise ratio.
  • the receiving unit 502 is further configured to receive information periodically sent by the neighboring base station to indicate the level of the neighboring IOT.
  • FIG. 6 is a block diagram of a preferred structure of a power control apparatus according to an embodiment of the present invention.
  • the apparatus further includes a sending unit 602 configured to periodically phase.
  • the neighboring cell sends a message for characterizing the IOT level of the cell.
  • the determining unit 506 is further configured to determine the IOT level of the current cell at the end of the current period; and determine the interference level of the current cell in the current period according to the correspondence between the IOT level and the level information of the interference level.
  • the level information; the sending unit 602 is further configured to send information indicating the IOT level of the local cell to the neighboring base station at the beginning of the next period.
  • the information of the IOT level of the current cell includes: level information of the interference level of the local cell.
  • the SINRTarget is adjusted according to the IOT level of the neighboring cell to the user location (edge or center) of the local area
  • the SINRTarget of the uplink PUSCH channel of the user is adaptively adjusted according to the IOT level of the neighboring cell and the user location of the local cell, thereby adjusting the uplink PUSCH power of the UE. , thereby adaptively adjusting the uplink transmit power of the user.
  • embodiments of the present invention also provide a base station for performing the method according to the present invention.
  • the base station conventionally includes a processor 710 and a computer program product or computer readable medium in the form of a memory 720.
  • Memory 720 can be an electronic memory such as a flash memory, EEPROM (Electrically Erasable Programmable Read Only Memory), EPROM, hard disk, or ROM.
  • Memory 720 has a memory space 730 for program code 731 for performing any of the method steps described above.
  • storage space 730 for program code may include various program code 731 for implementing various steps in the above methods, respectively.
  • the program code can be read from or written to one or more computer program products.
  • Such computer program products include program code carriers such as hard disks, compact disks (CDs), memory cards or floppy disks.
  • Such a computer program product is typically a portable or fixed storage unit as described with reference to FIG.
  • the storage unit may have a storage section, a storage space, and the like arranged similarly to the storage 720 in the base station of FIG.
  • the program code can be compressed, for example, in an appropriate form.
  • the storage unit includes computer readable code 731', code that can be read by a processor, such as 710, which, when executed by a base station, causes the base station to perform various steps in the methods described above.

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Abstract

本申请提供了一种功率控制方法和装置，该方法包括：接收邻区基站发送的用于表示邻区干扰噪声比IOT水平的信息；使用表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限；根据干扰门限，确定UE的目标信干噪比；使用目标信干噪比对UE的上行功率进行控制。本申请降低了上行功率对邻区的干扰，提高了通信质量。

Description

功率控制方法和装置 技术领域
本申请涉及通信技术领域，特别是涉及一种功率控制方法和装置。
背景技术
目前，在长期演进(Long Term Evolution，LTE)系统中，基站对本小区的用户设备(User Equipment，UE)的上行发射功率进行控制，常用的控制方法是通过对不同路损下的目标信干噪比(SINRTarget)设置不同的值来实现，其中，SINRTarget的设置方式包括：
确定上行目标接收功率为：
Ppusch_r＝Po_pusch+(α-1)×PL  (1)
其中，Po_pusch为物理上行共享信道(Physical Uplink Shared Channel，PUSCH)期望接收功率，α表示部分路损补偿因子，均由网络侧设置，PL为基站和UE之间的路损。
确定SINRTarget为
SINRTarget＝Ppusch_r-(I+N)(dB值)  (2)
其中：
I+N＝-174dBm/Hz+10*log(180KHz)+NoiseFigure+ITh  (3)
NoiseFigure为噪声系数，ITh为设定的干扰门限，I为干扰，N为噪声。
在确定SINRTarget之后，基站将实际测量的信干噪比(Signal Interference Noise Ratio，SINR)与SINRTarget进行比较，如果实际测量的SINR大于SINRTarget，则发射功控命令字来降低UE的PUSCH上行发射功率，否则发 送功控命令字来提高UE的PUSCH发射功率，从而实现对UE的上行功率控制。
在现有技术中，LTE系统基本采用同频组网，通过上述功率控制方法对UE上行功率进行控制时，UE上行发射功率可能会对相邻小区造成同频干扰，降低通信质量。
发明内容
本申请所要解决的技术问题是提供一种功率控制方法和装置，能够减少UE上行发射功率对邻区造成的干扰。
为了解决上述问题，本申请公开了一种功率控制方法，包括：接收邻区基站发送的用于表示邻区干扰噪声比IOT水平的信息；使用表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限；根据干扰门限，确定UE的目标信干噪比；使用目标信干噪比对UE的上行功率进行控制。
为了解决上述问题，本申请还公开了一种功率控制装置，包括：接收单元，配置为接收邻区基站发送的用于表示邻区IOT水平的信息；调整单元，配置为使用表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限；确定单元，配置为根据干扰门限，确定UE的目标信干噪比；控制单元，配置为使用目标信干噪比对UE的上行功率进行控制。
为了解决上述问题，本申请又公开了一种计算机程序，包括计算机可读代码，当计算机可读代码在基站上运行时，导致基站执行上述的功率控制方法。
此外，本申请还公开了一种计算机可读介质，其中存储了上述计算机程序。
与现有技术相比，本申请具有以下优点：
在现有技术中，在进行上行功率控制时，是通过确定适当的SINRTarget来实现的，在确定SINRTarget时采用固定的ITh，其不能真实反映网络的实际干扰水平，据此获得的上行功率也就不能适应当前的网络干扰水平，可能会对邻区造成同频干扰，降低通信质量。在本申请中，根据邻区的IOT水平来确定出SINRTarget，因此，确定出的SINRTarget是考虑到网络的实际干扰水平的，据此得到的上行功率也是和邻区的干扰水平相适应的，因此，降低了上行功率对邻区的干扰，提高了通信质量。
附图说明
图1是LTE系统小区网络示意图；
图2是根据本发明实施例一的功率控制方法的流程图；
图3是根据本发明实施例二的为边缘UE确定新的干扰门限的方法的流程图；
图4是根据本发明实施例二的为中心UE确定新的干扰门限的方法的流程图；
图5是根据本发明实施例三的功率控制装置的结构框图；
图6是根据本发明实施例三的一种功率控制装置的优选的结构框图；
图7是根据本发明实施例的一种用于执行根据本发明的方法的基站的框图；以及
图8是根据本发明实施例的一种用于保持或者携带实现根据本发明的方法的程序代码的存储单元。
具体实施方式
为使本申请的上述目的、特征和优点能够更加明显易懂，下面结合附图和具体实施方式对本申请作进一步详细的说明。
现有技术中，在确定SINRTarget时采用固定的ITh，其不能真实反映网络的实际干扰水平，因此，无法根据邻区实际干扰水平调整本区用户的发射功率。如图1所示，假设小区0中有一用户A处在小区0、2、和3边缘重叠区，根据现有技术，用户A的SINRTarget为一固定值，并且基站会根据 该SINRTarget来调整用户A的发射功率，但是，如果小区2和3的上行IOT较高，则需要降低用户A发射功率(或SINRTarget)，以减小对小区2和3内的用户干扰；或，当小区2和3中没有用户或者干扰水平较低时，用户A的发射功率(或SINRTarget)完全可以提高，从而增加用户A的上行吞吐量。
考虑到现有技术中的缺陷，本申请在上行功控处理中考虑邻区上行干扰水平，并且，根据A3事件判断是哪些用户会对邻区造成干扰，在邻区干扰水平较高时，对本区中可能会对邻区造成干扰的用户降低上行发射功率，在邻区干扰较低或者邻区没有用户时，提高本区中的用户的上行发射功率。下面对本申请的实现过程进行具体说明。
实施例一
参照图2，示出了本申请一种功率控制方法，该方法可以由基站执行，用于对基站管理的小区中的UE的上行功率进行控制，该方法包括：
步骤202，接收邻区基站发送的用于表示邻区干扰噪声比(Interference over Thermal，IOT)水平的信息；
例如，本小区的基站通过X2口接收邻区基站发送的用于表示邻区IOT水平的信息，该表示邻区IOT水平的信息可以是新增的一个信息单元(Information Element，IE)。优选地，该表示邻区IOT水平的信息可以是邻区基站周期性发送的。
在具体实现时，本小区也可以向相邻小区发送表示邻区IOT水平的信息，其中，向相邻小区发送表示邻区IOT水平的信息可以通过以下方式实现：在当前周期结束时确定本小区的IOT水平；根据IOT水平和干扰水平的等级信息之间的对应关系，确定本小区在当前周期内的干扰水平的等级信息；在下一周期开始时，向邻区基站发送用于表示本小区IOT水平的信息，其中，本小区IOT水平的信息包括：本小区的干扰水平的等级信息。其中，IOT水平和干扰水平的等级信息之间的对应关系可以通过映射表实现，也可以通过其他对应方式实现，本申请对此不作限定。
通过本实施例，本小区可以向其他小区发送用于表示本小区IOT水平的信息。邻区可以采用类似的方式向本小区发送表示邻区IOT水平的信息，在 此不再赘述。
在本发明实施例的一个优选实例中，表示邻区IOT水平的信息包括用于表征该邻区干扰水平的等级信息。例如，该等级信息为第一等级信息、第二等级信息或第三等级信息；其中，第一等级信息表示邻区IOT水平大于或等于第一阈值；第二等级信息表示邻区IOT水平大于或等于第二阈值且小于第一阈值；第三等级信息表示邻区IOT水平小于第二阈值、邻区没有用户接入、或邻区没有上行业务，其中，第一阈值大于第二阈值。在本实施例中，将邻区IOT水平分成三个档次，邻区基站判断该基站所在邻区的邻区IOT水平满足哪个档次，则通过X2口将该档次对应的信息发送给相邻小区的基站，以便于相邻小区的基站根据邻区IOT水平调整UE的上行发射功率，例如，当邻区基站判断该基站所在邻区的邻区IOT水平满足大于第二阈值且小于第一阈值，则发送第二等级信息给相邻小区的基站。
步骤204，使用表示邻区IOT水平的信息，调整本小区中UE的干扰门限；
在本发明实施例的一个优选实例中，在确定接收到的表示邻区IOT水平的信息包括第一等级信息且本小区中任一UE的干扰门限小于最大干扰门限时，基站可以调高该UE的干扰门限(ITh)；在确定接收到的表示邻区IOT水平的信息包括第三等级信息且本小区中某一UE的干扰门限大于最小干扰门限时，基站降低该UE的干扰门限。也就是说，当邻区IOT水平高于第一阈值且本小区中某一UE的干扰门限小于最大干扰门限时，基站调高该UE的干扰门限，从而降低UE的上行发射功率，减小对邻区的干扰；当邻区IOT水平低于第二阈值且本小区中某一UE的干扰门限大于最小干扰门限时，基站降低该UE的干扰门限，从而提高UE的上行发射功率，在不对邻区造成较强干扰的同时，提高本小区的通信质量。
当然，为了能够更好地提高本小区每一个UE的通信质量，还可以根据UE的不同位置来单独进行每个UE的干扰门限值调整。
在本发明实施例的一个优选实例中，当UE位于本小区的边缘区域时，最大干扰门限为第一最大干扰门限值；最小干扰门限为第一最小干扰门限 值；当UE位于本小区的中心区域时，最大干扰门限为第二最大干扰门限值，最小干扰门限为第二最小干扰门限值；其中，第二最大干扰门限值大于第一最大干扰门限值，第二最小干扰门限值大于第二最小干扰门限值。由于和边缘区域相比，中心区域的门限值较高，由于门限值和发射功率成反比，因此，边缘区域的发射功率较高，保证了边缘区域的通信质量。
在本发明实施例的一个优选实例中，基站接收UE上报的A3事件，其中，A3事件中包含UE的邻区信息，据此可以知道该UE位于小区边缘区域；根据该邻区信息确定干扰UE的邻区标识；根据与邻区标识所对应的邻区的IOT水平的信息，调整本小区中UE的干扰门限。通过该实施例，基站可以使用位于边缘区域的UE对应的邻区来调整该UE的干扰门限，使得该调整更具有针对性。
在本发明实施例的另一个优选实例中，当UE位于本小区的边缘区域时，通过以下方式对干扰门限进行调整：对位于本小区的边缘区域的任一UE，当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第一步长的和小于第一最大干扰门限值时，以第一步长调高该UE的干扰门限，当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第一步长的和大于或等于第一最大干扰门限值时，调整该UE的干扰门限为第一最大干扰门限值，即，邻区IOT水平高于第一阈值时，调整该UE的干扰门限为：IThNew＝min(IThOld+IThUpStepSize，IThmaxEdge)，其中，IThNew为调整后的UE的干扰门限，IThOld为调整前的UE的干扰门限，IThUpStepSize为向上调整干扰门限的步长，IThmaxEdge为边缘区域内最大干扰门限值，min表示取最小值；当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第二等级信息时，保持该UE的干扰门限不变；当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第三等级信息，且UE的干扰门限与第二步长的差大于第一最小干扰门限值时，以第二步长调低该UE的干扰门限，当该UE的邻区上报的表示邻区IOT水平的信息包括第三等级信息，且该UE的干扰门限与第二步长的差小于或等于第一最小干扰门限值时，调整该UE的 干扰门限为第一最小干扰门限值，调整该UE的干扰门限为：IThNew＝max(IThOld-IThDwStepSize，IThminEdge)，其中，IThNew为调整后的UE的干扰门限，IThOld为调整前的UE的干扰门限，IThDwStepSize为向下调整干扰门限的步长，IThminEdge为边缘区域内最小干扰门限值，max表示取最大值。本实施例主要是对小区边缘的UE的上行发射功率进行调整，小区边缘的UE距离邻区较近，容易对邻区造成同频干扰，因此，对小区边缘的UE的上行发射功率的调整更依赖于邻区的干扰水平，当邻区干扰较高时，例如，邻区IOT水平高于第一阈值时，调高干扰门限，以便降低UE的上行发射功率，减小对邻区的干扰；当邻区干扰水平降低时，例如，邻区IOT水平低于第二阈值时，降低干扰门限，以便提高UE的上行发射功率，在不对邻区造成较强干扰的同时，提高本UE的通信质量。
在本发明实施例的又一个优选实例中，当UE位于本小区的中心区域时，通过以下方式对干扰门限进行调整：对位于本小区中心区域的任一UE，当本小区接收到的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第三步长的和小于第二最大干扰门限值时，以第三步长调高该UE的干扰门限，当本小区接收到的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第三步长的和大于或等于第二最大干扰门限值时，调整该UE的干扰门限为第二最大干扰门限值，即，调整该UE的干扰门限为：IThNew＝min(IThOld+IThUpStepSize，IThmaxcenter)，其中，IThNew为调整后的UE的干扰门限，IThOld为调整前的UE的干扰门限，IThUpStepSize为向上调整干扰门限的步长，IThmaxcenter为中心区域内最大干扰门限值，min表示取最小值；当本小区接收到的表示邻区IOT水平的信息包括第二等级信息或第三等级信息，且该UE的干扰门限与第四步长的差大于第二最小干扰门限值时，以第四步长调低该UE的干扰门限；当本小区接收到的表示邻区IOT水平的信息包括第二等级信息或第三等级信息，且该UE的干扰门限与第四步长的差小于或等于第二最小干扰门限值时，调整该UE的干扰门限为第二最小干扰门限值，即，当表示邻区IOT水平的信息包括第二信息或第三信息时，调整该UE的干扰门限为：IThNew＝max(IThOld -IThDwStepSize，IThmincenter)，其中，IThNew为调整后的UE的干扰门限，IThOld为调整前的UE的干扰门限，IThDwStepSize为向下调整干扰门限的步长，IThmincenter为中心区域内最小干扰门限值，max表示取最大值。本实施例主要是针对中心区域的UE的上行发射功率进行调整，中心区域的UE距离邻区较远，不容易对邻区造成同频干扰，因此，当邻区干扰不太高时，降低干扰门限，以便提高UE的上行发射功率，在不对邻区造成较强干扰的同时，提高本UE的通信质量；当邻区告饶较高时，才需要提高干扰门限，以便降低UE的发射功率，减小对邻区造成的干扰。
步骤206，根据干扰门限，确定UE的目标信干噪比；
确定上行目标接收功率为：
Ppusch_r＝Po_pusch+(α-1)×PL
其中，Po_pusch为PUSCH期望接收功率，α表示部分路损补偿因子，均由网络侧设置，PL为基站和UE之间的路损。
确定SINRTarget为
SLNRTarget＝Ppusch_r-(I+N)(dB值)
其中：
I+N＝-174dBm/Hz+10*log(180KHz)+NoiseFigure+ITh
NoiseFigure为噪声系数，ITh为设定的干扰门限。根据步骤204中确定的干扰门限计算SINRTarget。
步骤208，使用目标信干噪比对UE的上行功率进行控制。
在确定SINRTarget之后，基站将实际测量的SINR与SINRTarget进行比较，如果实际测量的SINR大于SINRTarget，则发射功控命令字来降低UE的PUSCH上行发射功率，否则发送功控命令字来提高UE的PUSCH发射功率，从而实现对UE的上行功率控制。
在现有技术中，在进行上行功率控制时，是通过确定适当的SINRTarget来实现的，在确定SINRTarget时采用固定的ITh，其不能真实反映网络的实际干扰水平，据此获得的上行功率也就不能适应当前的网络干扰水平，可能会对邻区造成同频干扰，降低通信质量。在本申请中，根据邻区的IOT水平来确定出SINRTarget，因此，确定出的SINRTarget是考虑到网络的实际干扰水平的，据此得到的上行功率也是和邻区的干扰水平相适应的，因此，降低了上行功率对邻区的干扰，提高了通信质量。
实施例二
本申请还提供了一种上行功率的控制方法，在不矛盾的情况下，该方法可以和上述实施例中的方法相结合。下面对本实施例所述的方法进行具体说明。
每个小区的基站周期性地测量本小区的上行IOT水平，并将测量结果通过X2口发送给同频邻区的基站，该上行IOT水平可以通过在X2消息加载信息(LOAD INFORMATION)中增加一条2比特(bit)的IE(例如UL Interference over Thermal Level)来表征，如表1和表2所示。
表1
Figure PCTCN2015075374-appb-000001
Figure PCTCN2015075374-appb-000002
表2
Figure PCTCN2015075374-appb-000003
IOT水平(IOTLevel)表示本小区上行所有PRB的平均干扰水平，如上表所示，IOT水平可以分为高中低3个等级，其中，高干扰对应于上个实施例中的第一等级信息，中干扰对应于上个实施例中的第二等级信息，低干扰对应于上个实施例中的第三等级信息。具体干扰水平可以通过以下方式确定：
基站侧在测量周期内，测量每个上行子帧中所有PUSCH占用PRB总干扰功率(包括热噪声)，计算热噪声功率(No x W)，其中，No表示上行载波 频率的白噪声功率谱密度，W表示上行PUSCH占用PRB带宽，计算总干扰功率和热噪声功率的比值并取dB值，即为每个子帧的上行IOT，对一个测量周期内所有IOT取平均(直接取平均或者递归)即为一个周期内的平均IOT。通过该方式，基站获得小区的平均IOT。
设置IOTLevel的门限TH1＞TH2，当本小区没有接入用户，或者没有上行业务时，设置IOT水平为低干扰；当某一周期内的平均IOT水平＜TH2时，设置IOT水平为低干扰；当TH2≤某一周期内的平均IOT水平＜TH1时，设置IOT水平为中干扰；当某一周期内平均IOT水平≥TH1时，设置IOT水平为高干扰。可以通过映射表的形式来体现上述IOT水平和干扰水平的等级信息之间的对应关系。
基站在当前周期结束时确定本小区的IOT水平；根据IOT水平和干扰水平的等级信息之间的对应关系，确定本小区在当前周期内的干扰水平的等级信息；在下一周期开始时，向邻区基站发送用于表示本小区IOT水平的信息，例如，通过X2口接收邻区基站发送的用于表示邻区IOT水平的信息，该表示邻区IOT水平的信息可以是新增的一个IE。优选地，该表示邻区IOT水平的信息可以是邻区基站周期性发送的，其中，本小区IOT水平的信息包括：本小区的干扰水平的等级信息。
需要说明的是，IOT水平和干扰水平的等级信息之间的对应关系也可以通过其他对应方式实现，本申请对此不作限定。
值得注意的是，对于每个小区，基站为UE配置A3事件，并将离开上报(ReportOnLeave)配置为真(True)，即，在满足A3事件离开条件时要上报测量报告。该A3事件应该早于用户切换的A3事件，用于判断用户为中心用户还是边缘用户：进入A3事件的用户为边缘用户，未进入A3事件的用户为中心用户。即保证那些通信质量较低，但又没有达到需要切换小区的UE能够通过本方法进行功率调整以提升通信质量。
其中，A3事件表示邻区服务质量比服务小区(本小区)的服务质量更好，是终端在小区间切换过程中要使用的值。
当满足如下不等式A3-1时，UE认为满足A3事件的进入条件：
当满足如下不等式A3-2时，UE认为满足A3事件的离开条件：
不等式A3-1(进入条件)为：
Mn+Ofn+Ocn-Hys＞Ms+OFS+Ocs+Off
不等式A3-2(离开条件)为
Mn+Ofn+Ocn+Hys＜Ms+OFS+Ocs+Off
其中，Mn为不考虑计算任何偏置的该邻区的测量结果；Ofn为该邻区频率特定的偏置；Ocn为该邻区的小区特定偏置，如果没有为邻区配置，则设置为零；Ms为没有计算任何偏置下的服务小区的测量结果；Ofs为服务频率上频率特定的偏置；Ocs为服务小区的小区特定偏置，如果没有为服务小区配置，该值设置为0；Hys为该事件的滞后参数；Off为该事件的偏移参数；Mn、Ms单位为dBm当表示RSRP时，或为dB当表示RSRQ时；Ofn、Ocn、Ofs、Ocs、Hys、Off单位为dB。
设置小区内所有用户的ITh初始值为ITh初值(IThInitial)，设置ITh的调整周期为T，假设IThNew为本周期用于计算SINRTarget的ITh，IThO1d为前一周期用户计算SINRTarget的ITh，下面分别对边缘位置的用户和中心位置的UE计算周期到达时的ITh。
图3是对边缘位置UE确定ITh的方法的流程图，如图3所示，该方法包括：
步骤302，设置小区内所有用户的ITh初始值为ITh初值(IThInitial)。
步骤304，判断是否收到边缘位置UE上报A3事件的邻区的IOT水平消息，如果是，则执行步骤306，否则，执行步骤314。
A3事件中包含UE的邻区信息，据此基站可以知道该UE位于小区边缘区域；并可根据该邻区信息确定干扰UE的邻区标识，然后，根据与邻区标识所对应的邻区的IOT水平的信息，调整本小区中UE的干扰门限，具体调整方法参见步骤306-316。
步骤306，判断该UE上报A3事件的邻区中是否有高干扰水平小区，即，判断该UE的邻区的IOT水平是否大于或等于TH1，如果是，则执行步骤308，否则执行步骤310；
步骤308，通过以下公式获得新的干扰门限：
IThNew＝min(IThOld+IThUpStepSize，IThmaxEdge)；
IThUpStepSize为向上调整干扰门限的步长，IThmaxEdge为边缘区域内最大干扰门限值，min表示取最小值。
步骤310，判断该UE上报A3事件的邻区中是否全是中干扰水平小区，即，该UE的邻区的IOT水平是否都大于或等于Th2且小于Th1，如果是，则执行步骤312，否则，执行步骤314；
步骤312，通过以下公式获得新的干扰门限：
IThNew＝IThOld；
步骤314，如果没有收到邻区的IOT水平消息或者该UE上报A3事件的邻区是低干扰水平的小区，即，该UE的邻区的IOT水平都小于Th2，则使用以下公式获得新的干扰门限：
IThNew＝max(IThOld-IThDwStepSize，IThminEdge)。
其中，IThDwStepSize为向下调整干扰门限的步长，IThminEdge为边缘区域内最小干扰门限值，max表示取最大值。
步骤316，使用新的干扰门限更新SINRtarget。
图4是对中心位置UE确定ITh的方法的流程图，如图4所示，该方法包括：
步骤402，设置小区内所有用户的ITh初始值为ITh初值(IThInitial)。
步骤404，判断是否没有收到邻区的IOT水平消息，或者收到邻区的IOT水平消息中无高干扰水平(收到的邻区的IOT水平小于Th1)，如果是，则执行步骤406，否则，执行步骤408；
步骤406，通过以下公式获得新的干扰门限：
IThNew＝max(IThOld-IThDwStepSize，IThmincenter)；
其中，IThDwStepSize为向下调整干扰门限的步长，IThmincenter为中心区域内最小干扰门限值，max表示取最大值。
步骤408，通过以下公式获得新的干扰门限：
IThNew＝min(IThOld+IThUpStepSize，IThmaxcenter)；
其中，IThUpStepSize为向上调整干扰门限的步长，IThmaxcenter为中心区域内最大干扰门限值，min表示取最小值。
步骤410，使用新的干扰门限更新SINRtarget。
需要说明的是，在上述实施例中，Thmaxcenter、IThmincenter、IThmaxEdge和IThminEdge均由基站配置，由于中心用户对邻区干扰较小，因此，对于中心用户ITh的配置门限要高于边缘用户，即：IThmaxcenter＞IThmaxEdge，IThmincenter＞IThminEdge。由于和边缘区域相比，中心区域的门限值较高，由于门限值和发射功率成反比，因此，边缘区域的发射功率较高，保证了边缘区域的通信质量。
通过上述方式，在每个周期后，基站为每个UE确定最新的IThNew，使用该干扰门限，得到新的针对该UE的SINRTarget。基站最终根据新的SINRTarget对UE进行功率控制。
实施例三
如图5所示，本申请提供了一种功率控制装置，该装置可以是基站或者设置于基站中的装置，并且，该装置可以用于实现上述方法实施例，因此，上述方法实施例中的特征都可以应用到本实施例中。如图5所示，该装置包括：
接收单元502，配置为接收邻区基站发送的用于表示邻区IOT水平的信息；
调整单元504，配置为使用表示邻区IOT水平的信息，调整本小区中UE的干扰门限；
确定单元506，配置为根据干扰门限，确定UE的目标信干噪比；
控制单元508，配置为使用目标信干噪比对UE的上行功率进行控制。
在本发明实施例的一个优选实例中，表示邻区IOT水平的信息包括用于表征该邻区干扰水平的等级信息。
在本发明实施例的一个优选实例中，该等级信息为：第一等级信息、第二等级信息或第三等级信息；其中，第一等级信息表示邻区IOT水平大于或等于第一阈值；第二等级信息表示邻区IOT水平大于或等于第二阈值且小于 第一阈值；第三等级信息表示邻区IOT水平小于第二阈值、邻区没有用户接入、或邻区没有上行业务，其中，第一阈值大于第二阈值。
在本发明实施例的一个优选实例中，调整单元502配置为：
当表示邻区IOT水平的信息包括第一等级信息且本小区中任一UE的干扰门限小于最大干扰门限时，调高该UE的干扰门限；
当表示邻区IOT水平的信息包括第三等级信息且本小区中任一UE的干扰门限大于最小干扰门限时，降低该UE的干扰门限。
在本发明实施例的一个优选实例中，当UE位于本小区的边缘区域时，最大干扰门限为第一最大干扰门限值；最小干扰门限为第一最小干扰门限值；当UE位于本小区的中心区域时，最大干扰门限为第二最大干扰门限值，最小干扰门限为第二最小干扰门限值；其中，第二最大干扰门限值大于第一最大干扰门限值，第二最小干扰门限值大于第二最小干扰门限值。
在本发明实施例的一个优选实例中，接收单元502还配置为接收UE上报的A3事件，其中，A3事件中包含UE的邻区信息；确定单元506还配置为根据邻区信息确定干扰UE的邻区标识；调整单元504配置为根据与邻区标识所对应的邻区的IOT水平的信息，调整本小区中UE的干扰门限。
在本发明实施例的一个优选实例中，当UE位于本小区的边缘区域时，调整单元504还配置为：
对位于本小区的边缘区域的任一UE，当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第一步长的和小于第一最大干扰门限值时，以第一步长调高该UE的干扰门限，当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第一步长的和大于或等于第一最大干扰门限值时，调整该UE的干扰门限为第一最大干扰门限值；
当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第二等级信息时，保持该UE的干扰门限不变；
当与该UE所对应的邻区发送的表示邻区IOT水平的信息包括第三等级信息，且该UE的干扰门限与第二步长的差大于第一最小干扰门限值时，以 第二步长调低UE的干扰门限，当该UE的邻区上报的表示邻区IOT水平的信息包括第三等级信息，且该UE的干扰门限与第二步长的差小于或等于第一最小干扰门限值时，调整该UE的干扰门限为第一最小干扰门限值。
在本发明实施例的一个优选实例中，当UE位于本小区的中心区域时，调整单元504还配置为：
对位于本小区中心区域的任一UE，当本小区接收到的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第三步长的和小于第二最大干扰门限值时，以第三步长调高该UE的干扰门限，当本小区接收到的表示邻区IOT水平的信息包括第一等级信息，且该UE的干扰门限与第三步长的和大于或等于第二最大干扰门限值时，调整该UE的干扰门限为第二最大干扰门限值；
当本小区接收到的表示邻区IOT水平的信息包括第二等级信息或第三等级信息，且该UE的干扰门限与第四步长的差大于第二最小干扰门限值时，以第四步长调低该UE的干扰门限；当本小区接收到的表示邻区IOT水平的信息包括第二等级信息或第三等级信息，且该UE的干扰门限与第四步长的差小于或等于第二最小干扰门限值时，调整该UE的干扰门限为第二最小干扰门限值。
在本发明实施例的一个优选实例中，接收单元502还配置为通过X2口接收邻区基站发送的用于表示邻区IOT水平的信息。
在本发明实施例的一个优选实例中，控制单元508还配置为使用目标信干噪比对UE的物理上行共享信道PUSCH的上行功率进行控制。
在本发明实施例的一个优选实例中，接收单元502还配置为接收邻区基站周期性发送的用于表示邻区IOT水平的信息。
图6是根据本发明实施例的一种功率控制装置的优选的结构框图，如图6所示，在本发明实施例的一个优选实例中，上述装置还包括发送单元602，配置为周期性向相邻小区发送用于表征本小区IOT水平的消息。确定单元506还配置为在当前周期结束时确定本小区的IOT水平；根据IOT水平和干扰水平的等级信息之间的对应关系，确定本小区在当前周期内的干扰水平的 等级信息；发送单元602还配置为在下一周期开始时，向邻区基站发送用于表示本小区IOT水平的信息，优选地，本小区IOT水平的信息包括：本小区的干扰水平的等级信息。
本实施例根据邻区IOT水平对本区用户位置(边缘或中心)调整SINRTarget，综合考虑了邻区IOT水平以及本小区用户位置来自适应调整用户的上行PUSCH信道的SINRTarget，进而调整UE的上行PUSCH功率，从而自适应调整用户的上行发射功率。
此外，本发明实施例还提供了一种用于执行根据本发明的方法的基站，如图7所示，该基站传统上包括处理器710和以存储器720形式的计算机程序产品或者计算机可读介质。存储器720可以是诸如闪存、EEPROM(电可擦除可编程只读存储器)、EPROM、硬盘或者ROM之类的电子存储器。存储器720具有用于执行上述方法中的任何方法步骤的程序代码731的存储空间730。例如，用于程序代码的存储空间730可以包括分别用于实现上面的方法中的各种步骤的各个程序代码731。这些程序代码可以从一个或者多个计算机程序产品中读出或者写入到这一个或者多个计算机程序产品中。这些计算机程序产品包括诸如硬盘，紧致盘(CD)、存储卡或者软盘之类的程序代码载体。这样的计算机程序产品通常为如参考图8所述的便携式或者固定存储单元。该存储单元可以具有与图7的基站中的存储器720类似布置的存储段、存储空间等。程序代码可以例如以适当形式进行压缩。通常，存储单元包括计算机可读代码731’，即可以由例如诸如710之类的处理器读取的代码，这些代码当由基站运行时，导致该基站执行上面所描述的方法中的各个步骤。
本说明书中的各个实施例均采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似的部分互相参见即可。对于系统实施例而言，由于其与方法实施例基本相似，所以描述的比较简单，相关之处参见方法实施例的部分说明即可。
以上对本申请所提供的一种功率控制方法和装置，进行了详细介绍，本文中应用了具体个例对本申请的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本申请的方法及其核心思想；同时，对于本领域的一般技术人员，依据本申请的思想，在具体实施方式及应用范围上均会有改变之处，综上所述，本说明书内容不应理解为对本申请的限制。

Claims (30)

  1. 一种功率控制方法，包括：
    接收邻区基站发送的用于表示邻区干扰噪声比IOT水平的信息；
    使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限；
    根据所述干扰门限，确定所述UE的目标信干噪比；
    使用所述目标信干噪比对所述UE的上行功率进行控制。
  2. 如权利要求1所述的方法，其中，所述表示邻区IOT水平的信息包括用于表征该邻区干扰水平的等级信息。
  3. 如权利要求2所述的方法，其中，所述等级信息为：第一等级信息、第二等级信息或第三等级信息；
    其中，所述第一等级信息表示所述邻区IOT水平大于或等于第一阈值；所述第二等级信息表示所述邻区IOT水平大于或等于第二阈值且小于第一阈值；所述第三等级信息表示所述邻区IOT水平小于所述第二阈值、所述邻区没有用户接入、或所述邻区没有上行业务，其中，所述第一阈值大于所述第二阈值。
  4. 如权利要求3所述的方法，其中，使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限的步骤包括：
    当表示邻区IOT水平的信息包括所述第一等级信息且本小区中任一UE的干扰门限小于最大干扰门限时，调高该UE的干扰门限；
    当表示邻区IOT水平的信息包括所述第三等级信息且本小区中任一UE的干扰门限大于最小干扰门限时，降低该UE的干扰门限。
  5. 如权利要求4所述的方法，其中，
    当所述UE位于本小区的边缘区域时，所述最大干扰门限为第一最大干扰门限值；所述最小干扰门限为第一最小干扰门限值；
    当所述UE位于本小区的中心区域时，所述最大干扰门限为第二最大干扰门限值，所述最小干扰门限为第二最小干扰门限值；其中，所述第二最大干扰门限值大于所述第一最大干扰门限值，所述第二最小干扰门限值大于所述第二最小干扰门限值。
  6. 如权利要求3所述的方法，其中，
    在使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限的步骤之前，所述方法还包括：
    接收所述UE上报的A3事件，其中，所述A3事件中包含所述UE的邻区信息；
    根据所述邻区信息确定干扰所述UE的邻区标识；
    使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限的步骤，包括：
    根据与所述邻区标识所对应的所述邻区的IOT水平的信息，调整本小区中UE的干扰门限。
  7. 如权利要求6所述的方法，其中，当所述UE位于本小区的边缘区域时，根据与所述邻区标识所对应的所述邻区的IOT水平的信息，调整本小区中用户设备UE的干扰门限的步骤，包括：
    对位于本小区的边缘区域的任一UE，当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与第一步长的和小于第一最大干扰门限值时，以所述第一步长调高所述UE的干扰门限，当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与所述第一步长的和大于或等于所述第一最大干扰门限值时，调整所述UE的干扰门限为所述第一最大干扰门限值；
    当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第二等级信息时，保持所述UE的干扰门限不变；
    当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第三等级信息，且所述UE的干扰门限与第二步长的差大于第一最小干扰门限值时，以所述第二步长调低所述UE的干扰门限，当所述UE的邻区上报的表示邻区IOT水平的信息包括所述第三等级信息，且所述UE的干扰门限与所述第二步长的差小于或等于第一最小干扰门限值时，调整所述UE的干扰门限为所述第一最小干扰门限值。
  8. 如权利要求3所述的方法，其中，当所述UE位于本小区的中心区域时，使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限的步骤，包括：
    对位于本小区中心区域的任一UE，当本小区接收到的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与第三步长的和小于第二最大干扰门限值时，以所述第三步长调高所述UE的干扰门限，当本小区接收到的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与所述第三步长的和大于或等于所述第二最大干扰门限值时，调整所述UE的干扰门限为所述第二最大干扰门限值；
    当本小区接收到的表示邻区IOT水平的信息包括所述第二等级信息或所述第三等级信息，且所述UE的干扰门限与第四步长的差大于第二最小干扰门限值时，以所述第四步长调低所述UE的干扰门限；当本小区接收到的表示邻区IOT水平的信息包括所述第二等级信息或所述第三等级信息，且所述UE的干扰门限与第四步长的差小于或等于第二最小干扰门限值时，调整所述UE的干扰门限为所述第二最小干扰门限值。
  9. 如权利要求1至8中任一项所述的方法，其中，接收邻区基站发送的用于表示邻区IOT水平的信息的步骤，包括：
    通过X2口接收所述邻区基站发送的用于表示邻区IOT水平的信息。
  10. 如权利要求1至8中任一项所述的方法，其中，使用所述目标信干 噪比对所述UE的上行功率进行控制的步骤，包括：
    使用所述目标信干噪比对所述UE的物理上行共享信道PUSCH的上行功率进行控制。
  11. 如权利要求1至8中任一项所述的方法，其中，接收邻区基站发送的用于表示邻区IOT水平的信息的步骤，包括：
    接收邻区基站周期性发送的用于表示邻区IOT水平的信息。
  12. 如权利要求11所述的方法，其中，所述方法还包括：周期性向相邻小区发送用于表征本小区IOT水平的消息。
  13. 如权利要求12所述的方法，其中，周期性向相邻小区发送用于表征本小区IOT水平的消息的步骤，包括：
    在当前周期结束时确定本小区的IOT水平；
    根据IOT水平和干扰水平的等级信息之间的对应关系，确定本小区在当前周期内的干扰水平的等级信息；
    在下一周期开始时，向邻区基站发送用于表示所述本小区IOT水平的信息。
  14. 如权利要求13所述的方法，其中，所述本小区IOT水平的信息包括：所述本小区的干扰水平的等级信息。
  15. 一种功率控制装置，包括：
    接收单元，配置为接收邻区基站发送的用于表示邻区IOT水平的信息；
    调整单元，配置为使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限；
    确定单元，配置为根据所述干扰门限，确定所述UE的目标信干噪比；
    控制单元，配置为使用所述目标信干噪比对所述UE的上行功率进行控 制。
  16. 如权利要求15所述的装置，其中，所述表示邻区IOT水平的信息包括用于表征该邻区干扰水平的等级信息。
  17. 如权利要求16所述的装置，其中，所述等级信息为：第一等级信息、第二等级信息或第三等级信息；
    其中，所述第一等级信息表示所述邻区IOT水平大于或等于第一阈值；所述第二等级信息表示所述邻区IOT水平大于或等于第二阈值且小于第一阈值；所述第三等级信息表示所述邻区IOT水平小于所述第二阈值、所述邻区没有用户接入、或所述邻区没有上行业务，其中，所述第一阈值大于所述第二阈值。
  18. 如权利要求17所述的装置，其中，所述调整单元，配置为：
    当表示邻区IOT水平的信息包括所述第一等级信息且本小区中任一UE的干扰门限小于最大干扰门限时，调高该UE的干扰门限；
    当表示邻区IOT水平的信息包括所述第三等级信息且本小区中任一UE的干扰门限大于最小干扰门限时，降低该UE的干扰门限。
  19. 如权利要求18所述的装置，其中，
    当所述UE位于本小区的边缘区域时，所述最大干扰门限为第一最大干扰门限值；所述最小干扰门限为第一最小干扰门限值；
    当所述UE位于本小区的中心区域时，所述最大干扰门限为第二最大干扰门限值，所述最小干扰门限为第二最小干扰门限值；其中，所述第二最大干扰门限值大于所述第一最大干扰门限值，所述第二最小干扰门限值大于所述第二最小干扰门限值。
  20. 如权利要求17所述的装置，其中，
    所述接收单元，还配置为在所述调整单元使用所述表示邻区IOT水平的信息，调整本小区中用户设备UE的干扰门限之前，接收所述UE上报的A3事件，其中，所述A3事件中包含所述UE的邻区信息；
    所述确定单元，还配置为根据所述邻区信息确定干扰所述UE的邻区标识；
    所述调整单元，配置为：根据与所述邻区标识所对应的所述邻区的IOT水平的信息，调整本小区中UE的干扰门限。
  21. 如权利要求20所述的装置，其中，当所述UE位于本小区的边缘区域时，所述调整单元配置为：
    对位于本小区的边缘区域的任一UE，当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与第一步长的和小于第一最大干扰门限值时，以所述第一步长调高所述UE的干扰门限，当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与所述第一步长的和大于或等于所述第一最大干扰门限值时，调整所述UE的干扰门限为所述第一最大干扰门限值；
    当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第二等级信息时，保持所述UE的干扰门限不变；
    当与所述UE所对应的邻区发送的表示邻区IOT水平的信息包括所述第三等级信息，且所述UE的干扰门限与第二步长的差大于第一最小干扰门限值时，以所述第二步长调低所述UE的干扰门限，当所述UE的邻区上报的表示邻区IOT水平的信息包括所述第三等级信息，且所述UE的干扰门限与所述第二步长的差小于或等于第一最小干扰门限值时，调整所述UE的干扰门限为所述第一最小干扰门限值。
  22. 如权利要求17所述的装置，其中，当所述UE位于本小区的中心区域时，所述调整单元配置为：
    对位于本小区中心区域的任一UE，当本小区接收到的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与第三步长的和小于第二最大干扰门限值时，以所述第三步长调高所述UE的干扰门限，当本小区接收到的表示邻区IOT水平的信息包括所述第一等级信息，且所述UE的干扰门限与所述第三步长的和大于或等于所述第二最大干扰门限值时，调整所述UE的干扰门限为所述第二最大干扰门限值；
    当本小区接收到的表示邻区IOT水平的信息包括所述第二等级信息或所述第三等级信息，且所述UE的干扰门限与第四步长的差大于第二最小干扰门限值时，以所述第四步长调低所述UE的干扰门限；当本小区接收到的表示邻区IOT水平的信息包括所述第二等级信息或所述第三等级信息，且所述UE的干扰门限与第四步长的差小于或等于第二最小干扰门限值时，调整所述UE的干扰门限为所述第二最小干扰门限值。
  23. 如权利要求15至22中任一项所述的装置，其中，所述接收单元配置为：
    通过X2口接收所述邻区基站发送的用于表示邻区IOT水平的信息。
  24. 如权利要求15至22中任一项所述的装置，其中，所述控制单元配置为：
    使用所述目标信干噪比对所述UE的物理上行共享信道PUSCH的上行功率进行控制。
  25. 如权利要求15至22中任一项所述的装置，其中，所述接收单元还配置为：
    接收邻区基站周期性发送的用于表示邻区IOT水平的信息。
  26. 如权利要求25所述的装置，其中，所述装置还包括：发送单元，配置为周期性向相邻小区发送用于表征本小区IOT水平的消息。
  27. 如权利要求25所述的装置，其中，
    所述确定单元还配置为：在当前周期结束时确定本小区的IOT水平；根据IOT水平和干扰水平的等级信息之间的对应关系，确定本小区在当前周期内的干扰水平的等级信息；
    所述发送单元还配置为：在下一周期开始时，向邻区基站发送用于表示所述本小区IOT水平的信息。
  28. 如权利要求27所述的装置，其中，所述本小区IOT水平的信息包括：所述本小区的干扰水平的等级信息。
  29. 一种计算机程序，包括计算机可读代码，当所述计算机可读代码在基站上运行时，导致所述基站执行根据权利要求1-14中的任一项所述的功率控制方法。
  30. 一种计算机可读介质，其中存储了如权利要求29所述的计算机程序。
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