CN107872866B - Uplink interference control method and system and base station for controlling uplink interference - Google Patents
Uplink interference control method and system and base station for controlling uplink interference Download PDFInfo
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- CN107872866B CN107872866B CN201610852166.5A CN201610852166A CN107872866B CN 107872866 B CN107872866 B CN 107872866B CN 201610852166 A CN201610852166 A CN 201610852166A CN 107872866 B CN107872866 B CN 107872866B
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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
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/243—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
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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
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/245—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account received signal strength
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Abstract
The invention discloses an uplink interference control method and system and a base station for controlling uplink interference, and relates to the technical field of communication. The invention can distinguish the type of the uplink interference by reducing the uplink transmitting power parameter and then reducing the uplink transmitting power by adopting the hardware attenuation method, can reduce the uplink interference of the local network by reducing the uplink transmitting power of the base station, and can reduce the interference of other networks by an attenuator in a physical attenuation mode, thereby effectively reducing the uplink interference on the premise of ensuring the user experience.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to an uplink interference control method and system, and a base station for controlling uplink interference.
Background
With the development of wireless communication technology, mobile phones are inseparable from the production and life of people. The wide use of mobile applications such as instant messaging, news, online video and the like enriches the lives of people on the one hand, and obviously increases the load of a wireless network on the other hand. The femtocell is also limited in coverage from the beginning and gradually transits to limited capacity and limited interference.
High-altitude traffic scenes of stadium stands are difficult points which must be solved when telecommunication operators optimize networks. Because of the intensive traffic in such areas, the reverse capacity of the base station is often very low due to the severe uplink interference.
The interference sources of the uplink interference mainly comprise other network interference, home network interference and equipment failure. In the prior art, in order to solve the problem of uplink interference of a base station, uplink attenuation of a miniature base station is often automatically increased at high telephone traffic, so that interference is reduced. However, the method can effectively solve the interference of other networks, but for the interference of the local network, the method can cause the signal quality of the mobile phone of the user to be poor, and the user experience is influenced.
Disclosure of Invention
The embodiment of the invention aims to solve the technical problem that: how to reduce uplink interference on the premise of ensuring the communication quality of a user aiming at different uplink interference types.
According to a first aspect of the embodiments of the present invention, there is provided an uplink interference control method, including: the base station monitors whether the interference index value of the base station is greater than a preset high threshold or not; if the interference index value of the base station is larger than the preset high threshold, the base station reduces the uplink transmitting power of the base station according to the parameter down-regulation template; the base station compares the reduced interference index value with a preset low threshold; and if the interference index value of the base station is greater than the preset low threshold, the base station performs link attenuation through an attenuator.
In one embodiment, the base station comparing the reduced interference indicator value with a preset low threshold comprises: the base station compares the reduced interference index value with a preset high threshold and a preset low threshold; if the interference index value of the base station is larger than the preset low threshold, the link attenuation of the base station through the attenuator comprises the following steps: if the interference index value of the base station is larger than the preset high threshold, the base station attenuates the link through an attenuator; if the interference index value of the base station is between the preset high threshold and the preset low threshold, the base station reduces the uplink transmitting power of the base station according to the parameter down-regulation template again; and the uplink transmitting power parameter in the parameter down-regulation template is smaller than the uplink transmitting power parameter in the parameter down-regulation template.
In one embodiment, after the base station reduces the uplink transmission power of the base station according to the parameter by adjusting the template downward again, the method further includes: the base station compares the interference index value of the base station with a preset low threshold again; and if the interference index value of the base station is greater than the preset low threshold, the base station performs link attenuation through an attenuator.
In one embodiment, the base station performing link attenuation by the attenuator comprises: and the base station performs uplink attenuation and downlink attenuation through the attenuator, and the difference value of the attenuation value of the uplink attenuation and the attenuation value of the downlink attenuation is within a preset range.
In one embodiment, the base station performing uplink attenuation and downlink attenuation by the attenuator comprises: the base station adjusts the uplink attenuation value of the uplink to enable the interference index value of the uplink to reach the interference index reference value; and the base station performs downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
In one embodiment, after the base station performs link attenuation through the attenuator, the base station determines whether an interference index value of the base station is higher than a preset low threshold; and if the interference index value of the base station is higher than the preset low threshold, judging that the base station has a fault.
In one embodiment, the interference indicator value is a strength indicator value of a received signal, and/or the uplink transmission power includes a transmission power of a base station when the terminal initially accesses and/or a transmission power of the base station when the terminal accesses the network.
According to a second aspect of the embodiments of the present invention, there is provided a base station for controlling uplink interference, including: the interference monitoring module is used for monitoring whether the interference index value of the base station is greater than a preset high threshold or not; the first parameter adjusting module is used for reducing the uplink transmitting power of the base station according to the parameter down-regulation template when the interference index value of the base station is greater than a preset high threshold; the control effect detection module is used for comparing the reduced interference index value with a preset low threshold; and the hardware attenuation module is used for carrying out link attenuation through the attenuator when the control effect detection module detects that the interference index value of the base station is greater than a preset low threshold.
In one embodiment, the control effect detection module is further configured to compare the reduced interference index value with a preset high threshold and a preset low threshold; the base station also comprises a second parameter adjusting module, which is used for reducing the uplink transmitting power of the base station according to the parameter down-regulation template again when the interference index value of the base station is between the preset high threshold and the preset low threshold; wherein, the uplink transmitting power parameter in the parameter down-regulation template is smaller than the uplink transmitting power parameter in the parameter down-regulation template; and the hardware attenuation module is further used for carrying out link attenuation through an attenuator when the interference index value of the base station is greater than a preset high threshold.
In one embodiment, the system further comprises a control effect secondary detection module and a hardware attenuation module; the control effect secondary detection module is used for comparing the interference index value of the base station with a preset low threshold again; and the hardware attenuation module is used for carrying out link attenuation through the attenuator when the control effect secondary detection module detects that the interference index value of the base station is greater than a preset low threshold.
In one embodiment, the hardware attenuation module is further configured to perform uplink attenuation and downlink attenuation, and a difference value between an attenuation value of the uplink attenuation and an attenuation value of the downlink attenuation is within a preset range.
In one embodiment, the hardware attenuation module includes: an uplink attenuation unit, configured to adjust an uplink attenuation value of an uplink, so that an interference index value of the uplink reaches an interference index reference value; and the downlink attenuation unit is used for performing downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
In one embodiment, further comprising: the hardware attenuation effect detection module is used for judging whether the interference index value of the base station is higher than a preset low threshold after the hardware attenuation module is adopted to carry out link attenuation; and the fault alarm module is used for judging that the base station has a fault when the interference index value of the base station is higher than a preset low threshold.
In one embodiment, the interference indicator value is a strength indicator value of a received signal, and/or the uplink transmission power includes a transmission power of a base station when the terminal initially accesses and/or a transmission power of the base station when the terminal accesses the network.
In one embodiment, the hardware attenuation module comprises an interference index value acquisition module, a digital-to-analog conversion module, an uplink attenuator and a downlink amplifier; the interference index value acquisition module is used for measuring the interference index value of the base station in real time and sending the interference index value to the interference index value monitoring module positioned inside and/or outside the base station, and the interference index value monitoring module is used for comparing the interference index value sent by the interference index value acquisition module with the interference index reference value, controlling the digital-to-analog conversion module and the uplink attenuator to perform uplink attenuation according to the comparison result, and controlling the downlink amplifier to perform downlink attenuation.
According to a third aspect of the embodiments of the present invention, there is provided an uplink interference control system, including: any of the foregoing base stations, couplers, and high power loads. The coupler is connected with the base station, the coupling degree of the coupler is 7-30 dB, and the power load is connected with the coupler.
The invention can distinguish the type of the uplink interference by reducing the uplink transmitting power parameter and then reducing the uplink transmitting power by adopting the hardware attenuation method, can reduce the uplink interference of the local network by reducing the uplink transmitting power of the base station, and can reduce the interference of other networks by an attenuator in a physical attenuation mode, thereby effectively reducing the uplink interference on the premise of ensuring the user experience.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a flowchart of an uplink interference control method according to an embodiment of the present invention.
Fig. 2 is a flowchart of an uplink interference control method according to another embodiment of the present invention.
Fig. 3 is a flowchart of an embodiment of an uplink and downlink balanced attenuation method according to the present invention.
Fig. 4 is a block diagram of a base station for controlling uplink interference according to an embodiment of the present invention.
Fig. 5 is a block diagram of another embodiment of a base station for controlling uplink interference according to the present invention.
Fig. 6 is a structural diagram of an embodiment of an RRU of the present invention.
Fig. 7 is a block diagram of an uplink interference control system according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
An uplink interference control method according to an embodiment of the present invention is described below with reference to fig. 1.
Fig. 1 is a flowchart of an uplink interference control method according to an embodiment of the present invention. As shown in fig. 1, the method of this embodiment includes:
step S102, the base station monitors whether the interference index value of the base station is larger than a preset high threshold.
The interference index value may be, for example, RSSI (Received Signal Strength Indication) value. The RSSI is continuously too high, which means that the received uplink signal is too strong, and the interference between signals is too large, which may affect the signal demodulation.
The uplink transmission power may include, for example, the transmission power of the base station when the terminal initially accesses, the transmission power of the base station when the terminal accesses the internet, and the like.
And step S104, if the interference index value of the base station is greater than the preset high threshold, the base station reduces the uplink transmitting power of the base station according to the parameter down-regulation template.
If the interference index value of the base station is larger than the preset high threshold, the current uplink interference is too large, and the use of the user is influenced, so that the base station side is required to adjust, and the interference index value of the base station is reduced.
And step S106, the base station compares the reduced interference index value with a preset low threshold.
Since the uplink transmission power may not be adjusted immediately. Therefore, after step S104 is performed, step S106 may be performed again after waiting for a preset time. For example, the method may wait for 2-4 minutes and then compare the reduced interference index value with a preset low threshold.
And step S108, if the interference index value of the base station is larger than the preset low threshold, the base station attenuates the link through the attenuator.
By adopting the method of the above embodiment, the type of uplink interference can be identified. For the interference of the local network, the method for reducing the uplink transmitting power can be adopted for adjustment, and for the interference of the external network, the transmitting power of the base station can be attenuated through an attenuator. If the interference index value of the base station is still larger than the preset high threshold after the uplink transmission power parameter is adjusted, it indicates that the method for reducing the transmission power parameter of the terminal in the network cannot effectively reduce the uplink interference, and the cause of the interference is probably the interference of other networks. Therefore, a method of employing the hardware attenuation in step S108 may be considered.
If the interference index value of the base station is lower than the preset low threshold, the base station is indicated to reach the ideal state at this time, and the adjustment processing of this time can be ended.
The uplink transmission power parameters are reduced firstly, and then the uplink transmission power is reduced through hardware attenuation, so that the types of uplink interference can be distinguished, the uplink interference of the local network can be reduced through the method of reducing the uplink transmission power of the base station, the interference of other networks is reduced through an attenuator in a physical attenuation mode, and the uplink interference can be effectively reduced on the premise of ensuring the user experience.
The invention can also reduce the uplink transmitting power of the base station by adjusting the soft parameter again according to the interference index value after reducing the uplink transmitting power of the base station according to the parameter down-regulation template. An uplink interference control method according to another embodiment of the present invention is described below with reference to fig. 2.
Fig. 2 is a flowchart of an uplink interference control method according to another embodiment of the present invention. As shown in fig. 2, the method of this embodiment includes:
step S202, the base station monitors whether the interference index value of the base station is larger than a preset high threshold.
And step S204, if the interference index value of the base station is greater than the preset high threshold, the base station reduces the uplink transmitting power of the base station according to the parameter down-regulation template.
The steps S202 to S204 can be specifically implemented by referring to the steps S102 to S104.
Reducing the uplink transmit power of the base station based on the parameter down-scaling template is a heuristic process. In step S204, the uplink transmit power of the base station is first adjusted down moderately, and then it is detected whether the reduction degree of the interference index value reaches the preset effect.
In step S206, the base station compares the reduced interference index value with a preset high threshold and a preset low threshold. If the interference index value of the base station is greater than the preset high threshold, executing step S2122; if the interference index value of the base station is between the preset high threshold and the preset low threshold, executing step S208; if the interference index value of the base station is smaller than the preset low threshold, step S2124 is executed.
If the interference index value of the base station directly drops below the low threshold after the uplink transmitting power is adjusted, the current ideal state is achieved, and the adjustment can be finished.
If the interference index value of the base station is between the preset high threshold and low threshold after the uplink transmission power adjustment, the method of reducing the uplink transmission power may be continuously adopted to adjust the base station, that is, step S208 is executed.
And step S208, the base station reduces the uplink transmitting power of the base station according to the parameters by reducing the template downwards again.
And the uplink transmitting power parameter in the parameter down-regulation template is smaller than the uplink transmitting power parameter in the parameter down-regulation template.
In step S210, the base station compares the interference index value of the base station with the preset low threshold again. If the interference index value of the base station is greater than the preset low threshold, executing step S2122; if the interference index value of the base station is smaller than the preset low threshold, step S2124 is executed.
If the interference index value of the base station is still larger than the preset low threshold after uplink transmission power adjustment again, that is, the ideal state is not reached yet, the attenuator can be adopted for further attenuation.
In step S2122, the base station performs link attenuation through the attenuator.
After the base station performs link attenuation through the attenuator, the base station may further determine whether an interference index value of the base station is higher than a preset low threshold. And if the interference index value of the base station is higher than the preset low threshold, judging that the base station has a fault, and considering the maintenance and replacement of the base station.
And step S2124, finishing the adjustment.
If the interference index value of the base station is lower than the preset high threshold, the method for reducing the uplink transmitting power of the base station can effectively reduce the uplink interference of the base station, namely the uplink interference mainly comes from the interference of the local network. Therefore, the method for adjusting the parameters can be continuously adopted to reduce the uplink interference.
If the interference index value of the base station is not only lower than the preset high threshold but also lower than the preset low threshold, it indicates that the base station has reached the ideal state, and the adjustment process of this time can be ended.
By adopting the method, the uplink transmitting power of the base station can be firstly reduced tentatively to reduce the transmitting power of the local network, the type of the uplink interference is judged according to the adjusted result, and when the reason of the uplink interference is the local network interference, the local network interference is further reduced by reducing the uplink transmitting power of the base station, so that the uplink interference is reduced while the communication quality of a user is ensured, and the user experience is improved.
In the above embodiment, when the base station is the hua cheng RRU3606 base station, the parameter downward adjustment template and the parameter downward adjustment template again may refer to table 1, for example.
TABLE 1
In table 1, OpenLoopAdjust refers to uplink transmission power when a terminal accesses a base station, and the value range in a parameter template may be-105 to-75, and the value in the parameter down-regulation template is smaller than that in the parameter down-regulation template; the PCTMax, the PCTMin, the PCTInit and the PCTNoData are respectively the maximum uplink transmitting power, the minimum uplink transmitting power, the initial uplink transmitting power and the uplink transmitting power without data in the terminal internet surfing process, the value range of the parameters in the parameter template can be-28672 to-22016, and the value of the parameter in the parameter down-regulation template is smaller than that in the parameter down-regulation template; the 1x data service switch indicates whether a 2G data service is opened; the 1x access channel configuration refers to the number of access channels, and when the value of the parameter is larger, the probability of mutual collision between terminals which simultaneously transmit uplink channels can be reduced; the 1x handoff branch number and the DO handoff branch number respectively refer to the number of signals which can be simultaneously received by 2G and 3G signal coverage edge users, and reducing the branch number can reduce the sector coverage, and usually can reduce the power of uplink transmission signals received by a sector; the RC configuration is used for reflecting the data transmission speed of the user, when RC3 is changed to RC4, the terminal with good signal can use the transmission power margin to quickly finish data transmission, and generally, the power of the sector for receiving uplink transmission signals can be reduced; TXGAIN refers to the transmission power of a sector, and the smaller the transmission power, the smaller the sector coverage area, and the smaller the uplink transmission signal receiving power of a general sector.
The parameters in the parameter downregulating template and reference values are given in table 1 only by way of example. For other types of base stations, the adjustment may be performed with reference to the template, or may be performed with other adjustments, which is not described herein again.
In step S2122 of the above embodiment, a conventional uplink attenuation method may be adopted. However, in a high interference application scenario, if the downlink gain is fixed, the uplink attenuation is continuously increased, which may cause the interference to the terminal at the downlink coverage edge of the base station, and seriously degrade the uplink coverage quality.
The invention can solve the problems by adopting an uplink and downlink balanced attenuation mode. The uplink and downlink balanced attenuation means that the base station performs uplink attenuation and downlink attenuation through the attenuator, and the difference value between the attenuation value of the uplink attenuation and the attenuation value of the downlink attenuation is within a preset range. The uplink and downlink balanced attenuation method according to an embodiment of the present invention is described below with reference to fig. 3.
Fig. 3 is a flowchart of an embodiment of an uplink and downlink balanced attenuation method according to the present invention. As shown in fig. 3, the method of this embodiment includes:
in step S302, the base station adjusts the uplink attenuation value of the uplink so that the interference index value of the uplink reaches the interference index reference value.
The base station may gradually adjust the attenuation value of the uplink so as to gradually bring the interference index value of the uplink to the interference index reference value.
And step S304, the base station performs downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
After the uplink adjustment is completed, the downlink may set an attenuation value close to the uplink attenuation value. For example, if the uplink attenuation value is L, the downlink attenuation value may be a value in the range of [ L-3dB, L +3dB ].
By adopting the method, the attenuation can be carried out on the uplink and the downlink in a balanced way, and the terminal coverage quality of the base station is improved.
A base station for controlling uplink interference according to an embodiment of the present invention is described below with reference to fig. 4.
Fig. 4 is a block diagram of a base station for controlling uplink interference according to an embodiment of the present invention. As shown in fig. 4, the base station 40 of this embodiment includes: an interference monitoring module 41, configured to monitor whether an interference index value of the base station 40 is greater than a preset high threshold; a parameter down-regulation module 42, configured to reduce, when the interference index value of the base station 40 is greater than a preset high threshold, the uplink transmit power of the base station 40 according to the parameter down-regulation template; a control effect detection module 43, configured to compare the reduced interference index value with a preset low threshold; a hardware attenuation module 44, configured to perform link attenuation through an attenuator when the control effect detection module detects that the interference index value of the base station 40 is greater than a preset low threshold.
The interference index value is a strength index value of a received signal, and/or the uplink transmission power includes the transmission power of the base station 40 when the terminal initially accesses and/or the transmission power of the base station 40 when the terminal accesses the internet.
A base station for controlling uplink interference according to another embodiment of the present invention is described below with reference to fig. 5.
Fig. 5 is a block diagram of another embodiment of a base station for controlling uplink interference according to the present invention. As shown in fig. 5, the control effect detection module 43 of this embodiment is further configured to compare the reduced interference index value with the preset high threshold and low threshold; the base station 40 further includes a parameter re-adjustment module 55, configured to reduce the uplink transmission power of the base station according to the parameter re-adjustment template when the interference index value of the base station 40 is between the preset high threshold and the preset low threshold; wherein, the uplink transmitting power parameter in the parameter down-regulation template is smaller than the uplink transmitting power parameter in the parameter down-regulation template; the hardware attenuation module 44 is further configured to perform link attenuation through an attenuator when the interference index value of the base station is greater than a preset high threshold.
In addition, the base station 40 may further include a control effect secondary detection module 56. The control effect secondary detection module 56 is configured to compare the interference index value of the base station 40 with the preset low threshold again; the hardware attenuation module 44 is configured to perform link attenuation through an attenuator when the control effect secondary detection module 56 detects that the interference index value of the base station 40 is greater than the preset low threshold.
Wherein, the hardware attenuation module 44 may be further configured to perform uplink attenuation and downlink attenuation, and a difference value between an attenuation value of the uplink attenuation and an attenuation value of the downlink attenuation is within a preset range.
The hardware attenuation module 44 may further include: an uplink attenuation unit 542, configured to adjust an uplink attenuation value of the uplink so that an uplink interference index value reaches an interference index reference value; a downlink attenuation unit 544, configured to perform downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
Further, the base station 40 may further include: a hardware attenuation effect detection module 57, configured to determine whether an interference index value of the base station 40 is higher than a preset low threshold after the hardware attenuation module 44 is used to perform link attenuation; and a fault alarm module 58, configured to determine that the base station 40 has a fault when the interference index value of the base station 40 is higher than the preset lower threshold.
In the above embodiments, the hardware attenuation module 44 may be internal or external. A schematic structural diagram of an RRU (Radio Remote Unit) with a built-in attenuator for the hardware attenuation module 44 of the present invention is described below with reference to fig. 6, where the RRU in this embodiment is located inside the base station 40.
Fig. 6 is a structural diagram of an embodiment of an RRU of the present invention. As shown in fig. 6, RRU60 of this embodiment includes: an interference index value acquisition module 61, an interference index value monitoring module 62, a digital-to-analog conversion module 6422, an uplink attenuator 6424, and a downlink amplifier 6442.
The interference index value obtaining module 61 is configured to measure an interference index value of the base station in real time, and send the interference index value to the interference index value monitoring module 62. The interference indicator value acquisition module 61 may be, for example, a transmitter.
The interference index value monitoring module 62 may be located in the microprocessor of the base station, and configured to compare the interference index value sent by the interference index value obtaining module 61 with the interference index reference value, and control the uplink attenuating unit 542 and the downlink attenuating unit 544 to attenuate according to the comparison result.
The interference index value monitoring module 62 may also be located outside the base station, that is, other devices besides the base station control the corresponding modules in the hardware attenuation module 44 to perform uplink attenuation and downlink attenuation, as required. The uplink attenuating unit 542 in the foregoing embodiment may be a digital-to-analog converting module 6422 and an uplink attenuator 6424 in this embodiment. Uplink attenuator 6424 may use, for example, a PIN diode attenuator.
The downlink attenuation unit 544 in the foregoing embodiment may be a downlink amplifier 6442 in this embodiment, and the RRU60 may attenuate the downlink by reducing the downlink gain of the downlink amplifier 6442.
In addition, when performing downlink attenuation, the interference index value monitoring module 62 may report the current uplink attenuation value to a BBU (Building base band Unit), and the centralized network manager sets the transmission gain of the increased sector carrier frequency, for example, the TXGAIN parameter, so as to attenuate the downlink.
In another embodiment, RRU60 may also include digital intermediate frequency 63, up converter 64, down converter 65, and circulator 66. Digital intermediate frequency 63 is connected to up-converter 64 and down-converter 65, respectively, up-converter 64 is connected to downlink attenuation unit 544, down-converter is connected to uplink attenuation unit 542, and circulator 66 is connected to uplink attenuation unit 562 and downlink attenuation unit 544, respectively.
The following describes a schematic structural diagram of an uplink interference control system using an external attenuator according to the present invention with reference to fig. 7.
Fig. 7 is a block diagram of an uplink interference control system according to an embodiment of the present invention. As shown in fig. 7, the system of this embodiment includes: a base station 40, a coupler 72, and a high power load 74. The coupler 72 is connected with a base station, the coupling degree of the coupler 72 is between 7 and 30dB, and the power load 74 is connected with the coupler.
In the application scenario of high traffic, a large amount of other network terminal spurious signals interfere the base station. Therefore, the coupler can be set to have a greater degree of coupling, so that attenuation of the base station transmission power can be achieved.
In addition, the base station can be provided with a plurality of types of couplers, and the couplers are replaced according to the maximum field intensity in the practical application scene. For example, when the maximum field strength is-35 dBm, a coupler with the coupling degree of 7-15 dB can be used, and a 10dB coupler is preferred; when the maximum field strength is-30 dBm, a 10-15 dB coupler can be used, preferably a 15dB coupler.
In the above embodiment, the input terminal of the coupler 72 is connected to the rf output terminal of the base station 40, the through terminal of the coupler 72 is connected to the power load 74, and the coupling terminal of the coupler 72 is connected to the antenna feed system originally connected to the base station 40.
Furthermore, the method according to the invention may also be implemented as a computer program product comprising a computer readable medium having stored thereon a computer program for performing the above-mentioned functions defined in the method of the invention. Those of skill would further appreciate that the various illustrative logical blocks, modules, circuits, and algorithm steps described in connection with the disclosure herein may be implemented as electronic hardware, computer software, or combinations of both.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (12)
1. An uplink interference control method, comprising:
the base station monitors whether the interference index value of the base station is greater than a preset high threshold or not;
if the interference index value of the base station is larger than a preset high threshold, the base station reduces the uplink transmitting power of the base station according to a parameter down-regulation template;
the base station compares the reduced interference index value with a preset high threshold and a preset low threshold;
if the interference index value of the base station is larger than a preset high threshold, the base station performs link attenuation through an attenuator;
if the interference index value of the base station is between the preset high threshold and the preset low threshold, the base station reduces the uplink transmitting power of the base station according to the parameter reducing template again, wherein the uplink transmitting power parameter in the parameter reducing template is smaller than the uplink transmitting power parameter in the parameter reducing template again;
after the base station reduces the uplink transmitting power of the base station according to the parameter down-regulation template again, the base station compares the interference index value of the base station with the preset low threshold again; and if the interference index value of the base station is greater than the preset low threshold, the base station performs link attenuation through an attenuator.
2. The method of claim 1, wherein the base station performing link attenuation via an attenuator comprises:
and the base station performs uplink attenuation and downlink attenuation through the attenuator, and the difference value of the attenuation value of the uplink attenuation and the attenuation value of the downlink attenuation is within a preset range.
3. The method of claim 2, wherein the base station performing uplink and downlink attenuation by an attenuator comprises:
the base station adjusts the uplink attenuation value of the uplink to enable the interference index value of the uplink to reach the interference index reference value;
and the base station performs downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
4. The method of claim 1, wherein after the base station performs link attenuation through the attenuator, the base station determines whether an interference index value of the base station is higher than a preset low threshold;
and if the interference index value of the base station is higher than a preset low threshold, judging that the base station has a fault.
5. The method of claim 1,
the interference indicator value is a strength indicator value of the received signal, and/or,
the uplink transmitting power comprises the transmitting power of the base station when the terminal is initially accessed and/or the transmitting power of the base station when the terminal accesses the internet.
6. A base station for controlling uplink interference, comprising:
the interference monitoring module is used for monitoring whether the interference index value of the base station is greater than a preset high threshold or not;
the first parameter adjusting module is used for reducing the uplink transmitting power of the base station according to the parameter down-regulation template when the interference index value of the base station is greater than a preset high threshold;
the control effect detection module is used for comparing the reduced interference index value with a preset high threshold and a preset low threshold;
the second parameter adjusting module is used for reducing the uplink transmitting power of the base station according to the parameter down-regulation template again when the interference index value of the base station is between a preset high threshold and a preset low threshold; wherein, the uplink transmitting power parameter in the parameter down-regulation template is smaller than the uplink transmitting power parameter in the parameter down-regulation template;
the control effect secondary detection module is used for comparing the interference index value of the base station with a preset low threshold again;
a hardware attenuation module, configured to perform link attenuation through an attenuator when the control effect detection module detects that the interference index value of the base station is greater than a preset high threshold; and when the control effect secondary detection module detects that the interference index value of the base station is greater than a preset lower threshold, performing link attenuation through an attenuator.
7. The base station of claim 6, wherein the hardware attenuation module is further configured to perform an uplink attenuation and a downlink attenuation, and a difference between an attenuation value of the uplink attenuation and an attenuation value of the downlink attenuation is within a preset range.
8. The base station of claim 7, wherein the hardware attenuation module comprises:
an uplink attenuation unit, configured to adjust an uplink attenuation value of an uplink, so that an interference index value of the uplink reaches an interference index reference value;
and the downlink attenuation unit is used for performing downlink attenuation according to the uplink attenuation value and the attenuation value determined by the preset floating range.
9. The base station of claim 6, further comprising:
the hardware attenuation effect detection module is used for judging whether the interference index value of the base station is higher than a preset low threshold after the hardware attenuation module is adopted to carry out link attenuation;
and the fault alarm module is used for judging that the base station has a fault when the interference index value of the base station is higher than a preset low threshold.
10. The base station of claim 6,
the interference indicator value is a strength indicator value of the received signal, and/or,
the uplink transmitting power comprises the transmitting power of the base station when the terminal is initially accessed and/or the transmitting power of the base station when the terminal accesses the internet.
11. The base station of claim 6, wherein the hardware attenuation module comprises an interference index value obtaining unit, a digital-to-analog conversion module, an uplink attenuator and a downlink amplifier;
the interference index value acquisition module is used for measuring the interference index value of the base station in real time and sending the interference index value to the interference index value monitoring module positioned inside and/or outside the base station, and the interference index value monitoring module is used for comparing the interference index value sent by the interference index value acquisition module with the interference index reference value, controlling the digital-to-analog conversion module and the uplink attenuator to perform uplink attenuation according to the comparison result, and controlling the downlink amplifier to perform downlink attenuation.
12. An uplink interference control system, comprising:
the base station of any one of claims 6-11,
a coupler connected to the base station, the coupler having a coupling degree of 7 to 30dB,
a power load connected with the coupler.
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| CN101803429A (en) * | 2007-09-21 | 2010-08-11 | 高通股份有限公司 | Interference management utilizing power control |
| CN102256278A (en) * | 2011-06-29 | 2011-11-23 | 中兴通讯股份有限公司 | Method and device for controlling reverse interference in micro base station |
| CN105659670A (en) * | 2015-12-29 | 2016-06-08 | 中国科学院深圳先进技术研究院 | Wireless body area network power control method and system, and transmitting node |
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| JP4732963B2 (en) * | 2006-06-09 | 2011-07-27 | 株式会社日立製作所 | Wireless base station test equipment |
| US8700083B2 (en) * | 2007-08-10 | 2014-04-15 | Qualcomm Incorporated | Adaptation of transmit power based on maximum received signal strength |
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|---|---|---|---|---|
| CN101803429A (en) * | 2007-09-21 | 2010-08-11 | 高通股份有限公司 | Interference management utilizing power control |
| CN102256278A (en) * | 2011-06-29 | 2011-11-23 | 中兴通讯股份有限公司 | Method and device for controlling reverse interference in micro base station |
| CN105659670A (en) * | 2015-12-29 | 2016-06-08 | 中国科学院深圳先进技术研究院 | Wireless body area network power control method and system, and transmitting node |
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