WO2012129940A1 - 无线通信网络的动态优化方法、装置及无线通信系统 - Google Patents

无线通信网络的动态优化方法、装置及无线通信系统 Download PDF

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Publication number
WO2012129940A1
WO2012129940A1 PCT/CN2011/084410 CN2011084410W WO2012129940A1 WO 2012129940 A1 WO2012129940 A1 WO 2012129940A1 CN 2011084410 W CN2011084410 W CN 2011084410W WO 2012129940 A1 WO2012129940 A1 WO 2012129940A1
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Prior art keywords
optimization
interference
wireless communication
cell
signal
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PCT/CN2011/084410
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English (en)
French (fr)
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刘志敏
叶祖铨
阮连顺
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京信通信系统（中国）有限公司
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Publication of WO2012129940A1 publication Critical patent/WO2012129940A1/zh

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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
    • H04W52/244—Interferences in heterogeneous networks, e.g. among macro and femto or pico cells or other sector / system interference [OSI]
    • 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
    • H04W52/143—Downlink power control

Definitions

  • the present invention relates to the field of communication network technologies, and in particular, to a dynamic optimization method for a wireless communication network, a dynamic optimization device for a wireless communication network, and a wireless communication system.
  • RRU Remote RF Unit
  • RF remote unit is the remote RF remote module of the communication system. It has the characteristics of light weight, small size and convenient installation. It can be directly mounted on a metal mast or wall near the antenna.
  • RRU usually passes through fiber and BBU (Base). Band Units, baseband units) are connected together and together with the BBU form a distributed base station.
  • Figure 1 shows a schematic diagram of a BBU and an RRU forming a distributed base station. As shown in Figure 1, an IR (Interface) is used between the RRU and the BBU.
  • IR Interface
  • UTRAN is Universal Terrerstrial Radio Access Abbreviation for Network Universal Terrestrial Radio Access Network.
  • the distributed base station system composed of the above RRU and BBU has the characteristics of low power consumption, large capacity, low equipment cost, high integration, high reliability, flexible networking, etc., thereby greatly reducing the cost of network construction and maintenance, and is applicable.
  • these features make RRU widely used in GSM, CDMA, LTE, TD-SCDMA, WCDMA, CDMA2000, Wimax, WLAN networks, and in many cases replace macro base stations, micro-cells and repeaters Applications.
  • an object of the present invention is to provide a dynamic optimization method for a wireless communication network, a dynamic optimization device for a wireless communication network, and a wireless communication system that can dynamically and flexibly wirelessly
  • the communication network is dynamically adjusted to improve the flexibility and reliability of the wireless communication system.
  • a dynamic optimization method for a wireless communication network comprising the steps of: Listening to signals from neighboring cells; Determining whether there is interference in the signal of the neighboring cell that is detected; if yes, generating an optimized adjustment scheme, and adjusting the current cell or the neighboring cell that sends the interference signal according to the generated optimized adjustment scheme.
  • a dynamic optimization device for a wireless communication network comprising: a listening function link disposed on the RRU downlink, configured to listen to the frequency and power of signals of neighboring cells;
  • the interference judging unit is configured to determine, according to the signal that the interception function link is listening, whether the signal of the neighboring cell has interference;
  • An optimization scheme generating unit configured to generate an optimization adjustment scheme when the interference judging unit determines that there is interference;
  • an adjusting unit configured to perform optimization and adjustment on the current cell or the neighboring cell that sends the interference signal according to the optimized adjustment scheme generated by the optimization scheme generating unit.
  • a wireless communication system comprising a dynamic optimization device for a wireless communication network as described above.
  • the signal of the neighboring cell when the signal of the neighboring cell is intercepted and the interference of the signal of the neighboring cell is detected, a corresponding optimization adjustment scheme is generated, and the current cell is determined according to the generated optimized adjustment scheme.
  • the channel frequency or the transmit power of the neighboring cell that sends the interference signal is adjusted, thereby dynamically and flexibly allocating the channel, thereby improving the flexibility and reliability of the wireless communication system.
  • FIG. 1 is a schematic diagram of a BBU and an RRU forming a distributed base station; 2 is a schematic flow chart of an embodiment of a dynamic optimization method for a wireless communication network according to the present invention; 3 is a schematic structural diagram of an embodiment of a dynamic optimization apparatus for a wireless communication network according to the present invention; 4 is a schematic structural diagram of a listening function link of the dynamic optimization apparatus of the present invention; 5 is a schematic diagram of a star connection manner of a dynamic optimization apparatus for a wireless communication network according to the present invention; 6 is a schematic diagram of a chain connection manner of a dynamic optimization apparatus of a wireless communication network according to the present invention; 7 is a schematic diagram of a ring type connection manner of a dynamic optimization apparatus of a wireless communication network according to the present invention; FIG. 8 is a schematic diagram of a hybrid connection mode of a dynamic optimization apparatus of a wireless communication network according to the present invention.
  • Step S101 Turn on the listening function, listen to the frequency and power of the signal of the neighboring cell, and proceed to step S102;
  • Step S102 determining whether there is interference in the signal of the neighboring cell, if not, returning to step S101 to continue listening, if yes, proceeding to step S103;
  • Step S103 Generate an optimization adjustment scheme, and adjust the current cell or the neighboring cell that sends the interference signal according to the generated optimization adjustment scheme.
  • the signal of the neighboring cell when the signal of the neighboring cell is intercepted, and the interference of the signal of the neighboring cell is detected, a corresponding optimization adjustment scheme is generated, and the current cell is determined according to the generated optimization adjustment scheme.
  • the channel frequency or the transmit power of the neighboring cell that sends the interference signal is adjusted, thereby dynamically and flexibly allocating the channel, thereby improving the flexibility and reliability of the wireless communication system.
  • the specific listening mode may be implemented in the prior art, for example, femto (Femtocell, indoor mobile phone network access point technology, referred to as femto). Listening to the operating status and interference of other cells.
  • the RRU can detect the running state and interference of the inter-frequency cell in addition to the running state and interference of the same-frequency cell, and can increase the filter of the corresponding frequency band when listening to the inter-frequency cell.
  • the listening link can share a filter with the downlink, for the operating state and interference of the inter-frequency cell. Listening, you can increase the filter of the corresponding frequency band, and realize the same frequency listening function through the switching of the switch.
  • the judgment may be performed in a manner already in the prior art, for example, it may be:
  • the set threshold referred to as the first preset threshold
  • the first preset threshold can be freely set according to the actual situation;
  • the second preset when the same time domain, the same frequency domain, and the same code domain, the detected signal power is greater than the set threshold (referred to as the second preset).
  • the threshold value it is determined that there is interference in the signal that is heard; for different code domains, when the detected signal power minus the coding gain is greater than the set threshold (referred to as the third preset threshold)
  • the specific values of the second preset threshold and the third preset threshold may be freely set according to actual conditions, and the second preset threshold and the third The preset threshold can be set to the same value or set to a different value.
  • the optimized adjustment scheme generated above may be to directly increase the transmit power of the current cell, and adjust the step size of a certain set each time. After the adjustment unit adjusts, the signal of the neighboring cell is monitored, and the phase is judged. Whether the signal of the neighboring cell interferes with the signal of the local cell, and if there is interference, the above method is used for adjustment.
  • the generated optimization adjustment scheme may also be to reconfigure the cell by selecting a relatively pure frequency point for the current cell, and specifically, according to the electromagnetic wave space attenuation formula, calculate the distance of the neighboring cell to meet the QoS of the current cell (Quality Of Service, quality of service is the bottom line, and the transmit power of the current cell is set according to the electromagnetic wave space attenuation formula and the range to be covered by the cell.
  • QoS Quality of Service
  • the specific implementation manner is the same as that in the prior art, and details are not described herein.
  • the optimized adjustment scheme generated above may also be generated according to Qos:
  • the generated optimization adjustment scheme may be to lower the downtilt angle of the antenna of the neighboring cell that sends the interference signal, and also The transmission power of the neighboring cell that sends out the interference signal may be reduced.
  • the former is nonlinear, and the latter is linear. Relatively speaking, the former is better, and the downtilt angle is preferred.
  • the generated optimization adjustment scheme may be to re-select a relatively pure frequency point for the neighboring cell that sends out the interference signal, and satisfy the neighbor
  • the minimum transmit power is set, and the manner of selecting the pure frequency is the same as that in the first embodiment, and details are not described herein.
  • the optimization adjustment scheme may be to increase the transmission power of the current cell, or to reselect a relatively pure frequency point for the current cell, and set a minimum transmission power when the current cell QoS is satisfied.
  • the present invention further provides a dynamic optimization apparatus for a wireless communication network, as shown in FIG. 3, which is a schematic structural diagram of an embodiment of a dynamic optimization apparatus for a wireless communication network according to the present invention.
  • the interference judging unit is configured to determine, according to the signal that the interception function link is listening, whether the signal of the neighboring cell has interference;
  • An optimization scheme generating unit configured to generate an optimization adjustment scheme when the interference judging unit determines that there is interference;
  • the adjusting unit is configured to perform optimization and adjustment on the current cell or the neighboring cell that sends the interference signal according to the optimized adjustment scheme generated by the foregoing optimization scheme generating unit.
  • the above-mentioned listening function link of the RRU downlink may have multiple implementation manners, as long as the frequency and power of the signal of the neighboring cell can be detected, as shown in FIG. 4, the wireless communication of the present invention.
  • a schematic diagram of a specific embodiment of a listening function link of a dynamic optimization device of the network may specifically include: a filter, a low noise amplifier, and an ADC (Analog-to-Digital) Converter, analog-to-digital converter), and digital signal processing unit, the input of the low-noise amplifier is connected to the filter, the output of the low-noise amplifier is connected to the input of the ADC, and the output of the ADC is input to the digital signal processing unit. End connection.
  • the low-noise amplifier mainly amplifies the analog signal
  • the ADC completes the high-speed analog-to-digital conversion
  • the digital signal processing unit is used to complete the digitization processing of various standard signals. If the functions are distinguished, the digital signal processing unit may further include: The power subsystem provides power supply support for the system; the monitoring subsystem configures the digital chip, monitors the operating status of the system, and reports; the clock subsystem provides a working clock for each digital chip; the intermediate frequency processing subsystem implements digital down conversion Features.
  • the filter used may share the same filter with the downlink of the RRU to implement the interception of the same-frequency cell, and in addition, the filter of the corresponding frequency band may be added to implement
  • the interception of the inter-frequency cell can not only listen to the signal of the same-frequency cell, but also listen to the signal of the inter-frequency cell, and can realize the same-frequency listening function by switching the switch.
  • the listening function implemented by the interception function link of the solution of the present invention may exist at the same time as the standing wave detection function, the DPD cancellation function, the uplink diversity function, or the like, or may exist in a random combination, and may exist in the system independently of each other. in.
  • the listening function can exist independently even in the absence of any other path (including no uplink and downlink paths).
  • the 900 signal can be directly sampled by the ADC, or it can be downconverted to an intermediate or zero intermediate frequency and then sampled.
  • the judgment may be performed in a manner already in the prior art, for example, it may be:
  • the set threshold referred to as the first preset threshold
  • the first preset threshold can be freely set according to the actual situation;
  • the second preset when the same time domain, the same frequency domain, and the same code domain, the detected signal power is greater than the set threshold (referred to as the second preset).
  • the threshold value it is determined that there is interference in the signal that is heard; for different code domains, when the detected signal power minus the coding gain is greater than the set threshold (referred to as the third preset threshold)
  • the specific values of the second preset threshold and the third preset threshold may be freely set according to actual conditions, and the second preset threshold and the third The preset threshold can be set to the same value or set to a different value.
  • the positions set by the units in the dynamic optimization apparatus of the wireless communication network of the present invention are different, and the manner of optimization adjustment adopted in the specific optimization adjustment is also different, so that the finalized The effects will vary, and several of them are described below.
  • the interference judging unit has a plurality of, and is disposed at each of the RRUs.
  • the plurality of optimization scheme generating units are respectively disposed at each RRU, and the plurality of adjusting units are respectively disposed at each RRU. That is, each RRU is provided with a listening function link, an interference judging unit, an optimization scheme generating unit, and an adjusting unit, that is, each RRU is provided with a listening function link, an interference judging unit, and an optimization scheme.
  • a dynamic optimization device consisting of a unit and an adjustment unit, each RRU itself implements a series of dynamic optimization processes such as interception, interference judgment, optimization adjustment scheme generation, optimization adjustment, and the like.
  • the specific processing may be that the listening function link of the RRU listens to the frequency and power of the signal of the neighboring cell, and the interference determining unit determines the signal of the neighboring cell according to the signal detected by the RRU. Whether there is interference to the local cell, if there is interference, the optimization scheme generating unit generates a corresponding optimization adjustment scheme, and the adjustment unit optimizes and adjusts the local cell according to the generated optimization adjustment scheme. After the adjustment unit of the RRU is optimized and adjusted, the RRU also sends its own optimized and adjusted parameters to each adjacent cell, and can be sent to the BBU, RNC, OMC, etc. to enhance the reliability of the network. Make the relationship between adjacent cells closer.
  • the optimization adjustment scheme generated by the optimization scheme generating unit may be to directly increase the transmission power of the cell of the RRU (referred to as the current cell), and adjust the step size of each set by the adjustment unit, and then adjust the adjustment unit, and then The signals of the neighboring cells are intercepted to determine whether the signals of the neighboring cells interfere with the signals of the local cell, and if there is interference, the above manner is used for adjustment.
  • each RRU since each RRU is separately adjusted, each of them adjusts its own transmit power or downtilt angle. If the transmit power is adjusted, if the transmit power of the local cell is continuously increased, the current cell is transmitted. After the power is too high, interference may occur to the neighboring cells, so that the neighboring cells increase their own transmit power, so that each cell continuously adjusts its own transmit power, which causes the transmit power of each cell to be large. As a result, it enters a vicious circle, causing the performance of the entire system to deteriorate.
  • the optimization adjustment scheme generated by the optimization scheme generating unit of each RRU may also be to reconfigure the cell by selecting a relatively pure frequency point for the current cell, and specifically, calculating the distance of the neighboring cell according to the electromagnetic wave space attenuation formula, The QoS of the current cell is taken as the bottom line, and the transmit power of the current cell is set according to the electromagnetic wave space attenuation formula and the range to be covered by the cell.
  • the specific implementation manner is the same as that in the prior art, and details are not described herein.
  • the adjustment unit After the optimization scheme generating unit generates a suitable optimization adjustment scheme, the adjustment unit performs corresponding adjustment according to the optimization adjustment scheme to implement dynamic optimization of the wireless communication network.
  • the interference judging unit has a plurality of, respectively disposed at each RRU, and the optimization scheme generating unit has one, is disposed at the BBU or the management control center, and the adjusting unit has one, is set in the BBU or the management control.
  • each RRU is provided with a listening function link and an interference judging unit, and each RRU separately implements a process of interception and interference judgment, and the optimization plan generating unit and the adjusting unit are disposed at the upper BBU or the management control center.
  • the BBU or the management control center unify the process of generating and optimizing the optimization plan.
  • the management control center here may be the RNC, OMC or other management control center, and different settings may be made according to actual needs.
  • the specific processing procedure may be: the listening function link of each RRU listens to the frequency and power of the signal of the neighboring cell, and judges the phase according to the frequency and power of the signals of the detected cells. Whether the signal of the neighboring cell has interference to the local cell, if there is interference, the frequency and power of the signal of the neighboring cell that is detected are sent to the BBU or the management control center, and the neighboring cell may also interfere with the local cell.
  • the determination result is reported to the BBU or the management control center, and the optimization plan generation unit in the BBU or the management control center generates a corresponding optimization adjustment plan according to the optimization adjustment plan, and the adjustment unit performs optimization adjustment according to the optimization adjustment plan.
  • the optimization adjustment scheme generated by the optimization scheme generating unit may directly increase the transmission power of the current cell, and may adjust the step size of a certain setting each time, and after adjusting by the adjustment unit, intercept the signal of the neighboring cell. It is determined whether the signal of the neighboring cell interferes with the signal of the local cell, and if there is interference, the method is adjusted in the above manner.
  • the optimization adjustment scheme generated by the optimization scheme generating unit may also be to reconfigure the cell by selecting a relatively pure frequency point for the current cell, or specifically, calculating the distance of the neighboring cell according to the electromagnetic wave space attenuation formula to satisfy the current cell.
  • the QoS is the bottom line, and the transmit power of the current cell is set according to the electromagnetic wave space attenuation formula and the range to be covered by the cell.
  • the optimization scheme generation unit may also generate the optimization adjustment scheme according to Qos: When the Qos of the neighboring cell that sends the interference signal is high, for example, exceeds a certain upper limit value, the generated optimization adjustment scheme may be to lower the downtilt angle of the antenna of the neighboring cell, or The transmission power of the adjacent cell is reduced, the former is nonlinear, and the latter is linear.
  • the former has better effect, and the downtilt angle can be preferentially selected;
  • the Qos of the neighboring cell that sends the interference signal is not high, even if it is just satisfied, for example, lower than or just enough to reach a certain lower limit value, the neighboring cell has an interference signal, and the neighboring cell is
  • the generated optimized adjustment scheme may be to re-select a relatively pure frequency point for the neighboring cell, and satisfy the situation of the neighboring cell Qos.
  • the minimum transmit power is set, and the specific frequency of the pure frequency is the same as that in the first embodiment, and details are not described herein.
  • the optimization adjustment scheme may be to increase the transmission power of the current cell, or to reselect a relatively pure frequency point for the current cell, and set a minimum transmission power when the current cell QoS is satisfied.
  • the adjustment unit After the optimization scheme generating unit generates a suitable optimization adjustment scheme, the adjustment unit performs corresponding adjustment according to the optimization adjustment scheme to implement dynamic optimization of the wireless communication network.
  • the interference judging unit has one, is disposed at the BBU or the management control center
  • the optimization scheme generating unit has one
  • the adjusting unit has one, is set in the BBU or is managed.
  • the control center only the listening function link is set in each RRU, which is only used to listen to the frequency and power of the signals of the neighboring cells, and the interference judging unit, the optimization scheme generating unit, and the adjusting unit are disposed at the upper BBU or
  • the BBU or the management control center unifies the judgment of the interference, the generation and optimization of the optimization scheme.
  • the management control center here may be the RNC, OMC or other management control center, which can be different according to actual needs. Settings.
  • the specific processing procedure may be: the listening function link of each RRU listens to the frequency and power of the signal of the neighboring cell, and sends the frequency and power of the signal of each detected cell to the uplink.
  • the BBU or the management control center After receiving the BBU or the management control center, the BBU or the management control center receives the analysis and judgment, and determines whether the neighboring cell generates interference to the current cell. If yes, the optimization scheme generating unit generates a corresponding optimization adjustment plan, and the adjustment unit Optimize adjustment according to the optimization adjustment scheme.
  • the interference judging unit has one, is disposed at the BBU or the management control center
  • the optimization scheme adjusting unit has one, and is disposed at the BBU or the management control center
  • the adjusting unit has a plurality of
  • a listening function link and an adjustment unit are disposed in each RRU, and each RRU implements a process of intercepting, optimizing, and adjusting signals of neighboring cells, and the interference judging unit and the optimization scheme generating unit are disposed at the upper end.
  • the BBU or the management control center unifies the process of interference judgment and generates a corresponding optimization adjustment plan.
  • the management control center here may be the RNC, OMC or other management control center, according to the actual situation. Need to be able to make different settings.
  • the specific processing procedure may be: the listening function link of each RRU listens to the frequency and power of the signal of the neighboring cell, and sends the frequency and power of the signal of each detected cell to the uplink.
  • the interference judging unit After receiving the BBU or the management control center, the BBU or the management control center, the interference judging unit performs analysis and judgment to determine whether the neighboring cell generates interference to the current cell. If yes, the optimization scheme generating unit generates a corresponding optimization adjustment plan, and generates The optimization adjustment scheme is sent to the adjustment unit of the corresponding RRU, and the adjustment unit performs optimization adjustment according to the optimization adjustment scheme.
  • the descriptions of the dynamic optimization apparatus of the wireless communication network of the present invention are all described from the perspective of analyzing whether the neighboring cell interferes with the current cell.
  • the dynamic optimization apparatus according to the present invention can make the entire wireless communication network reach a state of dynamic balance.
  • the wireless network environment of the corresponding cell can be re-detected through the interception function, and corresponding measures are taken according to the detected signal, for example, increasing the transmit power of the cell and re-selecting the purer. Frequency point, etc.; when the QoS of the monitored cell rises to a certain value, the wireless network environment of the corresponding cell can be re-detected through the interception function, and corresponding measures are taken according to the detected signal, because the entire wireless communication network is dynamic Balanced, when the QoS of a certain cell is too high, it will inevitably affect the QoS of other related cells. At this time, the wireless communication network can be balanced by reducing the transmission power of the cell, so that the wireless communication network can reach a self. Optimization features.
  • the dynamic optimization device of the wireless communication network of the present invention may have different application scenarios according to different connection modes of the communication network, and several application scenarios are shown in FIG. 5 to FIG. Considering the solution of the present invention, it is necessary to set a listening function link in each RRU. Therefore, in FIGS. 5 to 8, the RRU is named as a listening RRU.
  • FIG. 5 it is a schematic diagram of the star connection mode.
  • the star connection is mainly used in densely populated areas.
  • the interception signal passes through fewer links, the user density is small, the network is simple, the reliability is high, and the maintenance and engineering installation are convenient.
  • Fig. 6 it is a schematic diagram of a chain connection method.
  • the chain connection is suitable for a strip-shaped distribution and a region with a small user density.
  • the interception signal passes through more links than the star connection, but in the same In the geographical environment, the length of the fiber used in the chain connection is less than that of the star connection, which saves the transmission equipment to some extent.
  • FIG. 7 it is a schematic diagram of a ring type connection mode.
  • each node in the ring has two upper nodes, and there are two links in the transmission of the interception signal, which improves the reliability of the link.
  • Sex more suitable for large venue applications.
  • FIG. 8 it is a schematic diagram of a hybrid connection mode, which mainly has the advantages of integrated chain connection and star connection, and is suitable for occasions where the user density is uneven and the difference is relatively large.
  • the present invention further provides a wireless communication system, which includes any of the dynamic optimization apparatuses of the wireless communication network as described above, and details are not described herein.
  • Automatic station opening function In the absence of engineers and technicians, the installer only needs to install the RRU in place and turn on the power.
  • the RRU can optimize the downtilt angle of the cell antenna through the interception function, so that the community can reasonably cover and listen.
  • Problem self-positioning function RRU can monitor and locate some problems in the operation of the system through the listening function in actual work, such as high call drop rate and strong interference signal;
  • Self-optimization function After self-positioning by problem, the system can automatically take corresponding optimization measures to solve the problem, so that the problem can be solved. Even if it cannot be solved automatically by the system, the problem can be located through the interception function, which is convenient for engineering technology. The personnel solve the problem in time, increase work efficiency, and improve the reliability of the network.
  • the above solution of the present invention can be mainly applied to communication networks of GSM, CDMA, TD-SCDMA, LTE, WCDMA, CDMA2000, Wimax, WLAN, and the like.

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Abstract

一种无线通信网络的动态优化方法、装置及无线通信系统，该方法包括步骤：侦听相邻小区的信号；判断侦听到的相邻小区的信号是否存在干扰；若存在，生成优化调整方案，并根据生成的优化调整方案对当前小区或者发出干扰信号的该相邻小区进行调整。根据上述本发明的方案，其是通过侦听相邻小区的信号，并在侦听到相邻小区的信号的干扰时，生成相应的优化调整方案，并依据生成的该优化调整方案对当前小区或者发出干扰信号的该相邻小区的信道频率或者发射功率进行调整，从而对信道进行动态、灵活的分配，提高了无线通信系统的灵活性和可靠性。

Description

无线通信网络的动态优化方法、装置及无线通信系统
技术领域
本发明涉及通信网络技术领域，特别涉及一种无线通信网络的动态优化方法、一种无线通信网络的动态优化装置以及一种无线通信系统。
背景技术
随着全球移动通信网络的快速发展、用户数量逐渐增加，移动运营商对容量和覆盖的要求也越来越高。在实际工程中，基站站址的选择并不容易，在一些应用场景中，机房位置不理想、无法设置机房，成为网络建设的一个大难题。
RRU（Remote RF Unit，射频拉远单元）是通信系统的远端射频拉远模块，具有重量轻、体积小、安装方便的特点，可以直接安装于靠近天线位置的金属桅杆或者墙面上。通常情况下，RRU通过光纤和BBU（Base Band Unit，基带单元）连接在一起，它与BBU一起构成了分布式基站。图1中示出了BBU与RRU构成分布式基站的示意图，如图1所示，RRU与BBU之间使用IR（Interface between the RRU and the BBU，RRU与BBU之间的接口）协议进行通信，BBU与RNC（Radio Network Controller，无线网络控制器）间通过Iub（Interface between the BBU and the RNC，BBU与RNC之间的接口）协议通信，RNC与CN（Core Network，核心网络）通过Iu（Interface between the UTRAN and the CN，UTRAN与CN之间的接口）协议进行通信，其中UTRAN为Universal Terrerstrial Radio Access Network通用陆地无线接入网络的简称。
上述RRU和BBU构成的分布式基站系统具有低功耗、大容量、低设备成本、高集成度、高可靠性、组网灵活等特点，从而使得网络建设和维护的成本大幅度降低，并且适用于多种容量覆盖场合，这些特点使RRU在GSM、CDMA、LTE、TD-SCDMA、WCDMA、CDMA2000、Wimax、WLAN网络中得到广泛的应用，并在许多场合替代宏基站、微蜂窝和直放站的应用。
面对日益激烈的竞争以及移动通信运营体制的改革，通信网络建设及环境监测引发了一系列有待解决的问题，传统的基站RRU技术已经不能满足运营商对网络质量提升和新业务开展的要求，新技术和新业务的开发和应用已经上升到一个十分重要的位置。在这种新应用中，对有限的频谱资源进行有效的利用是通信无线网络系统中的一个主要目的，在对有限的频谱资源进行利用时，大多的频率信道分配方式，是在超出一个给定的干扰距离外，对使用频率重新进行分配，应用这种方式的缺点在于，所分配的信道频率是固定的，因而要求精确和复杂的网络频率仿真，但是仿真出来的结果与实际应用还是会存在一定的误差。
发明内容
针对上述现有技术中存在的问题，本发明的目的在于提供一种无线通信网络的动态优化方法、一种无线通信网络的动态优化装置以及一种无线通信系统，其可以动态、灵活地对无线通信网络进行动态调整，提高无线通信系统的灵活性和可靠性。
为达到上述目的，本发明采用以下技术方案：
一种无线通信网络的动态优化方法，包括步骤：
侦听相邻小区的信号；
判断侦听到的相邻小区的信号是否存在干扰；若存在，生成优化调整方案，并根据生成的优化调整方案对当前小区或者发出干扰信号的该相邻小区进行调整。
一种无线通信网络的动态优化装置，包括：
设置在RRU下行链路的侦听功能链路，用于侦听相邻小区的信号的频率和功率；
干扰判断单元，用于根据侦听功能链路侦听的信号，判断相邻小区的信号是否存在干扰；
优化方案生成单元，用于在所述干扰判断单元判断出存在干扰时，生成优化调整方案；
调整单元，用于根据所述优化方案生成单元生成的优化调整方案，对当前小区或者发出干扰信号的该相邻小区进行优化调整。
一种无线通信系统，包括如上所述的无线通信网络的动态优化装置。
根据上述本发明的方案，其是通过侦听相邻小区的信号，并在侦听到相邻小区的信号的干扰时，生成相应的优化调整方案，并依据生成的该优化调整方案对当前小区或者发出干扰信号的该相邻小区的信道频率或者发射功率进行调整，从而对信道进行动态、灵活的分配，提高了无线通信系统的灵活性和可靠性。
附图说明
图1是BBU与RRU构成分布式基站的示意图；
图2是本发明无线通信网络的动态优化方法实施例的流程示意图；
图3是本发明的无线通信网络的动态优化装置实施例的结构示意图；
图4是本发明动态优化装置的侦听功能链路的结构示意图；
图5是本发明无线通信网络的动态优化装置的星型连接方式示意图；
图6是本发明无线通信网络的动态优化装置的链型连接方式示意图；
图7是本发明无线通信网络的动态优化装置的环型连接方式示意图；
图8是本发明无线通信网络的动态优化装置的混合型连接方式示意图。
具体实施方式
本发明方案的根本思想，是要能够对无线环境进行自动监测、进行优化调整，以满足系统的灵活性和可靠性的需求。以下就以其中的较佳具体实施例对本发明方案进行详细阐述。
如图2所示，是本发明的无线通信网络的动态优化方法实施例的流程示意图，如图2所示，本实施例中的方法包括步骤：
步骤S101：开启侦听功能，侦听相邻小区的信号的频率和功率，进入步骤S102；
步骤S102：判断相邻小区的信号是否存在干扰，若不存在，返回上述步骤S101继续侦听，若存在，进入步骤S103；
步骤S103：生成优化调整方案，并根据生成的优化调整方案对当前小区或者发出干扰信号的该相邻小区进行调整。
依据本实施例中的方案，其通过侦听相邻小区的信号，并在侦听到相邻小区的信号的干扰时，生成相应的优化调整方案，并依据生成的该优化调整方案对当前小区或者发出干扰信号的该相邻小区的信道频率或者发射功率进行调整，从而对信道进行动态、灵活的分配，提高了无线通信系统的灵活性和可靠性。
其中，在上述侦听相邻小区的信号时，具体的侦听方式可以是采用现有技术中已有的方式，例如femto（Femtocell，室内手机网络接入点技术，简称femto）中已经可以实现对其他小区的运行状态和干扰的侦听。然而，在本发明方案中，RRU除了侦听同频小区的运行状态和干扰，还可以侦听异频小区的运行状态和干扰，侦听异频小区时，增加相应频段的滤波器即可。在一个具体示例中，以移动GSM900系统为例，在侦听同频小区的运行状态和干扰时，侦听链路可与下行链路共用一个滤波器，对于异频小区的运行状态和干扰的侦听，可以增加相应频段的滤波器，通过开关的切换实现同异频的侦听功能。
在判定相邻小区是否存在干扰时，可以采用现有技术中已有的方式进行判断，例如可以是：
对于GSM系统，当在同一时间同一频率上，侦听到的信号功率大于设定的门限值（称为第一预设门限值）时，判定侦听到的信号存在干扰，该第一预设门限值可以依据实际情况自由设定；
对于TD-SCDMA、CDMA、CDMA2000、WCDMA、或者LTE系统，当在同一时域、同一频域且同一码域上，侦听到的信号功率大于设定的门限值（称为第二预设门限值）时，判定侦听到的信号存在干扰；对于不同的码域，当侦听到的信号功率减去编码增益大于设定的门限值（称为第三预设门限值）时，判定侦听到的信号存在干扰，其中，第二预设门限值、第三预设门限值的具体值可以根据实际情况自由设定，且第二预设门限值与第三预设门限值可以设定为相同值，也可以设定为不同的值。
上述生成的优化调整方案，可以是直接调高当前小区的发射功率，每次可调高某个设定的步长，经调整单元调整之后，再对相邻小区的信号进行侦听，判断相邻小区的信号是否对本小区的信号产生干扰，若有干扰，再采用上述方式进行调整。
采用这种方式时，由于是直接对当前小区的发射功率进行调整，若不断调高当前小区的发射功率，在当前小区的发射功率过高之后，有可能会对相邻小区产生干扰，使得又会调高相邻小区的发射功率，会使得各小区的发射功率都很大，从而会进入恶性循环，导致整个系统的性能恶化，对此，可以考虑设定每个小区的发射功率的最大值，或者考虑其他的调整方式。
对此，生成的优化调整方案，还可以是为当前小区选取较为纯净的频点来重新配置小区，具体可以是根据电磁波空间衰减公式，计算出临近小区的距离，以满足当前小区的QoS（Quality of Service，服务质量）为底线，再根据电磁波空间衰减公式及小区所要覆盖的范围设置当前小区的发射功率，具体的实现方式与现有技术中的相同，在此不予赘述。
上述生成的优化调整方案时，还可以是依据Qos来生成：
当发出干扰信号的相邻小区的Qos较高时，例如超过某个设定的上限值，所生成的优化调整方案可以是将该发出干扰信号的相邻小区的天线的下倾角下调，也可以是将该发出干扰信号的相邻小区的发射功率调小，前者是非线性的，后者是线性的，相对而言，前者效果更佳，可优先选用下调下倾角的方式；
当发出干扰信号的相邻小区的Qos不高时，甚至于是刚刚满足，例如低于或者刚好能达到某个设定的下限值，则说明该相邻小区有干扰信号，该相邻小区是通过提高发射功率来满足Qos的，从而对当前小区造成了干扰，对此，所生成的优化调整方案可以是为该发出干扰信号的相邻小区重新选取较为纯净的频点，在满足该相邻小区Qos的情况下设置最小的发射功率，具体的选取纯净的频点的方式与上述实施例一中的相同，在此不予赘述；
当发出干扰信号的相邻小区的Qos达到了设定的要求时，例如该相邻小区的Qos位于某个设定的范围之内，说明当前小区的配置可能不符合要求，因此，所生成的优化调整方案可以是调高当前小区的发射功率，或者也可以是为当前小区重新选取较为纯净的频点，在满足该当前小区Qos的情况下设置最小的发射功率。
根据上述本发明的无线通信网络的动态优化方法，本发明还提供一种无线通信网络的动态优化装置，如图3所示，是本发明的无线通信网络的动态优化装置的实施例的结构示意图，其包括有：
设置在RRU下行链路的侦听功能链路，用于侦听相邻小区的信号的频率和功率；
干扰判断单元，用于根据侦听功能链路侦听的信号判断相邻小区的信号是否存在干扰；
优化方案生成单元，用于在干扰判断单元判断出存在干扰时，生成优化调整方案；
调整单元，用于根据上述优化方案生成单元生成的优化调整方案，对当前小区或者发出干扰信号的该相邻小区进行优化调整。
其中，上述设置在RRU下行链路的侦听功能链路，可以有多种实现方式，只要能够侦听到相邻小区的信号的频率和功率，如图4所示，是本发明的无线通信网络的动态优化装置的侦听功能链路的一个具体实施例的结构示意图。其具体可以包括：滤波器、低噪声放大器、ADC（Analog-to-Digital Converter，模/数转换器）、以及数字信号处理单元，低噪声放大器的输入端与滤波器连接，低噪声放大器的输出端与ADC的输入端连接，ADC的输出端与数字信号处理单元的输入端连接。其中，低噪声放大器主要是对模拟信号进行放大，ADC完成高速模数变换，数字信号处理单元用于完成各种制式信号的数字化处理，从功能上来区分的话，上述数字信号处理单元又可包括：电源子系统，为系统提供电源支持；监控子系统，对数字芯片进行配置，监控系统的运行状态，并上报；时钟子系统，为各个数字芯片提供工作时钟；中频处理子系统，实现数字下变频功能。
在上述侦听功能链路中，所使用的滤波器可以与RRU的下行链路共用同一个滤波器，以实现对同频小区的侦听，此外，还可以增加相应频段的滤波器，以实现对异频小区的侦听，从而不仅可以侦听同频小区的信号，还可以侦听异频小区的信号，可以通过开关的切换来实现同异频的侦听功能。
上述本发明方案的侦听功能链路所实现的侦听功能，可与驻波检测功能、DPD对消功能、上行分集功能等同时存在，也可以随机组合存在，还可以相互独立地存在于系统中。甚至在没有其他任何通路（包括没有上行和下行通路）的情况下，侦听功能也可以独立的存在。
上述ADC在进行模数转换时，当信号频率比较高时，如GSM 900的信号，ADC可以对其进行直接采样，也可先将信号下变频到中频或零中频再对其进行采样。
在判定相邻小区是否存在干扰时，可以采用现有技术中已有的方式进行判断，例如可以是：
对于GSM系统，当在同一时间同一频率上，侦听到的信号功率大于设定的门限值（称为第一预设门限值）时，判定侦听到的信号存在干扰，该第一预设门限值可以依据实际情况自由设定；
对于TD-SCDMA、CDMA、CDMA2000、WCDMA、或者LTE系统，当在同一时域、同一频域且同一码域上，侦听到的信号功率大于设定的门限值（称为第二预设门限值）时，判定侦听到的信号存在干扰；对于不同的码域，当侦听到的信号功率减去编码增益大于设定的门限值（称为第三预设门限值）时，判定侦听到的信号存在干扰，其中，第二预设门限值、第三预设门限值的具体值可以根据实际情况自由设定，且第二预设门限值与第三预设门限值可以设定为相同值，也可以设定为不同的值。
基于不同的考虑因素，上述本发明的无线通信网络的动态优化装置中的各单元所设置的位置有所差异，从而在具体优化调整时所采用的优化调整的方式也有所不同，使得最终达到的效果也会有所不同，以下就其中的几种实施例分别进行说明。
实施例一
在本实施例中，上述干扰判断单元具有多个，分别设置在各RRU处，上述优化方案生成单元具有多个，分别设置在各RRU处，上述调整单元具有多个，分别设置在各RRU处，即每一个RRU中均设置有侦听功能链路、干扰判断单元、优化方案生成单元、调整单元，即各RRU处设置有由一个侦听功能链路、一个干扰判断单元、一个优化方案生成单元、一个调整单元组成的动态优化装置，由各RRU自身来实现侦听、干扰判断、优化调整方案的生成、优化调整等一系列的动态优化的过程。
在该实现方式中，具体的处理过程可以是，RRU的侦听功能链路侦听相邻小区的信号的频率和功率，干扰判断单元根据RRU侦听到的信号来判断该相邻小区的信号是否对本小区存在干扰，若存在干扰，则优化方案生成单元生成对应的优化调整方案，调整单元根据生成的优化调整方案对本小区进行优化调整。RRU的调整单元进行了优化调整之后，该RRU还将自己优化调整后的相关参数发送给各相邻的小区，同时可往上发送给BBU、RNC、OMC等设备，以增强网络的可靠性，使相邻小区间的关系更为密切。
上述优化方案生成单元生成的优化调整方案，可以是直接调高本RRU的小区（简称当前小区）的发射功率，每次可调高某个设定的步长，经调整单元调整之后，再对相邻小区的信号进行侦听，判断相邻小区的信号是否对本小区的信号产生干扰，若有干扰，再采用上述方式进行调整。
采用这种方式时，由于各RRU是分别进行调整，是各自对自己的发射功率或者下倾角进行调整，在调整发射功率的情况下，若不断调高本小区的发射功率，在当前小区的发射功率过高之后，有可能会对相邻小区产生干扰，使得相邻小区又调高自身的发射功率，从而各小区都不断地上调自己的发射功率，会使得各小区的发射功率都很大，从而会进入恶性循环，导致整个系统的性能恶化。
对此，各RRU的优化方案生成单元生成的优化调整方案，还可以是为当前小区选取较为纯净的频点来重新配置小区，具体可以是根据电磁波空间衰减公式，计算出临近小区的距离，以满足当前小区的QoS为底线，再根据电磁波空间衰减公式及小区所要覆盖的范围设置当前小区的发射功率，具体的实现方式与现有技术中的相同，在此不予赘述。
在优化方案生成单元生成了合适的优化调整方案后，调整单元根据该优化调整方案进行对应的调整，实现对无线通信网络的动态优化。
实施例二
在本实施例中，上述干扰判断单元具有多个，分别设置在各RRU处，上述优化方案生成单元具有一个，设置在BBU或者管理控制中心处，上述调整单元具有一个，设置在BBU或者管理控制中心处，即在各RRU中均设置有侦听功能链路、干扰判断单元，各RRU分别来实现侦听、干扰判断的过程，优化方案生成单元、调整单元设置在上端的BBU或者管理控制中心处，由BBU或者管理控制中心统一进行优化方案的生成和优化调整的过程，其中，这里的管理控制中心可以是RNC、OMC或者其他的管理控制中心，依据实际需要可以做不同的设定。
在该实现方式中，具体的处理过程可以是：各RRU的侦听功能链路侦听相邻小区的信号的频率和功率，并根据侦听到的各小区的信号的频率和功率判断该相邻小区的信号是否对本小区存在干扰，若存在干扰，则将侦听到的相邻小区的信号的频率和功率向上发送给BBU或者管理控制中心，同时还可以将该相邻小区对本小区存在干扰的判定结果上报给该BBU或者管理控制中心，BBU或者管理控制中心中的优化方案生成单元据此生成相应的优化调整方案，调整单元根据该优化调整方案进行优化调整。
优化方案生成单元生成的优化调整方案，可以是直接调高当前小区的发射功率，每次可调高某个设定的步长，经调整单元调整之后，再对相邻小区的信号进行侦听，判断相邻小区的信号是否对本小区的信号产生干扰，若有干扰，再采用上述方式进行调整。
采用这种方式时，由于是直接对当前小区的发射功率进行调整，若不断调高当前小区的发射功率，在当前小区的发射功率过高之后，有可能会对相邻小区产生干扰，使得又会调高相邻小区的发射功率，会使得各小区的发射功率都很大，从而会进入恶性循环，导致整个系统的性能恶化。
对此，优化方案生成单元生成的优化调整方案，还可以是为当前小区选取较为纯净的频点来重新配置小区，具体可以是根据电磁波空间衰减公式，计算出临近小区的距离，以满足当前小区的QoS为底线，再根据电磁波空间衰减公式及小区所要覆盖的范围设置当前小区的发射功率，具体的实现方式与现有技术中的相同，在此不予赘述。
优化方案生成单元在生成优化调整方案时，还可以是依据Qos来生成：
当发出干扰信号的相邻小区的Qos较高时，例如超过某个设定的上限值，所生成的优化调整方案可以是将该相邻小区的天线的下倾角下调，也可以是将该相邻小区的发射功率调小，前者是非线性的，后者是线性的，相对而言，前者效果更佳，可优先选用下调下倾角的方式；
当发出干扰信号的相邻小区的Qos不高时，甚至于是刚刚满足，例如低于或者刚好能达到某个设定的下限值，则说明该相邻小区有干扰信号，该相邻小区是通过提高发射功率来满足Qos的，从而对当前小区造成了干扰，对此，所生成的优化调整方案可以是为该相邻小区重新选取较为纯净的频点，在满足该相邻小区Qos的情况下设置最小的发射功率，具体的选取纯净的频点的方式与上述实施例一中的相同，在此不予赘述；
当发出干扰信号的相邻小区的Qos达到了设定的要求时，例如该相邻小区的Qos位于某个设定的范围之内，说明当前小区的配置可能不符合要求，因此，所生成的优化调整方案可以是调高当前小区的发射功率，或者也可以是为当前小区重新选取较为纯净的频点，在满足该当前小区Qos的情况下设置最小的发射功率。
在优化方案生成单元生成了合适的优化调整方案后，调整单元根据该优化调整方案进行对应的调整，实现对无线通信网络的动态优化。
本实施例中的其他技术特征与上述实施例一中的相同，在此不予赘述。
实施例三
在本实施例中，上述干扰判断单元具有一个，设置在BBU或者管理控制中心处，上述优化方案生成单元具有一个，设置在BBU或者管理控制中心处，上述调整单元具有一个，设置在BBU或者管理控制中心处，即在各RRU中只设置有侦听功能链路，只用来侦听相邻小区的信号的频率和功率，干扰判断单元、优化方案生成单元、调整单元设置在上端的BBU或者管理控制中心处，由BBU或者管理控制中心统一进行干扰的判断、优化方案的生成和优化调整，其中，这里的管理控制中心可以是RNC、OMC或者其他的管理控制中心，依据实际需要可以做不同的设定。
在该实现方式中，具体的处理过程可以是：各RRU的侦听功能链路侦听相邻小区的信号的频率和功率，并将侦听到的各小区的信号的频率和功率向上发送给BBU或者管理控制中心，BBU或者管理控制中心接收后，干扰判断单元进行分析判断，判断相邻小区是否对当前小区产生干扰，若是，则由优化方案生成单元生成相应的优化调整方案，由调整单元根据该优化调整方案进行优化调整。
本实施例中的其他技术特征与上述实施例二中的相同，在此不予赘述。
实施例四
在本实施例中，上述干扰判断单元具有一个，设置在BBU或者管理控制中心处，上述优化方案调整单元具有一个，设置在BBU或者管理控制中心处，上述调整单元具有多个，分别设置在各RRU处，即在各RRU中设置有侦听功能链路、调整单元，各RRU分别实现对相邻小区的信号的侦听、优化调整的过程，干扰判断单元、优化方案生成单元设置在上端的BBU或者管理控制中心处，由BBU或者管理控制中心统一进行干扰的判断的过程、并生成相应的优化调整方案，其中，这里的管理控制中心可以是RNC、OMC或者其他的管理控制中心，依据实际需要可以做不同的设定。
在该实现方式中，具体的处理过程可以是：各RRU的侦听功能链路侦听相邻小区的信号的频率和功率，并将侦听到的各小区的信号的频率和功率向上发送给BBU或者管理控制中心，BBU或者管理控制中心接收后，干扰判断单元进行分析判断，判断相邻小区是否对当前小区产生干扰，若是，则由优化方案生成单元生成相应的优化调整方案，并将生成的优化调整方案发送给对应的RRU的调整单元，由调整单元根据该优化调整方案进行优化调整。
本实施例中的其他技术特征与上述实施例二中的相同，在此不予赘述。
在上述各实施例中对本发明的无线通信网络的动态优化装置的说明中，均是从分析判断相邻小区是否对当前小区产生干扰的角度来进行说明，实际上，依据本发明的动态优化装置，可以使整个无线通信网络达到一个动态平衡的状态。
例如，当监测到小区的QoS下降到一定值，可通过侦听功能重新检测相应小区的无线网络环境，并根据侦听到的信号采取相应的措施，例如增大小区发射功率、重新选取较为纯净的频点等等；当监测到小区的QoS上升到一定值，可通过侦听功能重新检测相应小区的无线网络环境，并根据侦听到的信号采取相应的措施，因为整个无线通信网络是动态平衡的，当其中某个小区的QoS太高，势必会影响其他相关小区的QoS，此时可通过减小小区的发射功率等措施使无线通信网络达到平衡，从而使得无线通信网络可以达到一个自优化功能。
上述本发明的无线通信网络的动态优化装置，依据通信网络的连接方式的不同，可以有不同的应用场景，图5至图8示出了其中的几种应用场景。考虑到本发明方案中，需要在每个RRU中设置侦听功能链路，因此，在图5至图8中，是以将RRU命名为侦听RRU来进行说明。
如图5所示，是星型连接方式的示意图，星型连接主要用于人口稠密的地区，侦听信号经过的环节少、用户密度较小、网络简单、可靠性高、维护和工程安装方便。如图6所示，是链型连接方式的示意图，链型连接适用于带状分布、用户密度较小的地区，侦听信号经过的环节相对于星型连接方式要多一些，但是在同样的地理环境下，链型连接所应用的光纤的长度要比星型连接的少，从一定程度上节省了传输设备。如图7所示，是环型连接方式的示意图，在环型连接方式中，环中每个节点都有两个上级节点，侦听信号的传输存在两条链路，提高了链路的可靠性，比较适合于大型场馆的应用。如图8所示，是混合型连接方式的示意图，其主要是综合链型连接与星型连接各自的优点，适用于用户密度不均、差异比较大的场合。
根据上述本发明的无线通信网络的动态优化装置，本发明还提供一种无线通信系统，其包括如上所述的任意一种无线通信网络的动态优化装置，在此不予赘述。
据此，依据上述本发明方案，可以实现以下新功能：
自动开站功能：在没有工程技术人员的情况下，只需安装人员将RRU安装到位，打开电源，RRU便能通过侦听功能优化小区天线的下倾角，使小区能够合理地进行覆盖，侦听相邻小区信道频率的配置、相邻小区的发射功率等信息，自动配置系统的信道频率、发射功率等参数；
问题自定位功能：RRU在实际工作能通过侦听功能监测并定位系统运行过程中出现的一些问题，如掉话率高、干扰信号强烈；
自优化功能：通过问题自定位后，系统能自动对出现的问题采取相应的优化措施，使问题得以解决，即使不能通过系统自动解决的，通过侦听功能也可以将问题定位下来，方便工程技术人员及时解决问题，增加工作效率，提高网络的可靠性。
上述本发明方案，可主要应用于GSM、CDMA、TD-SCDMA、LTE、WCDMA、CDMA2000、Wimax、WLAN等制式的通信网络中。
以上所述的本发明实施方式，仅仅是对本发明的较佳实施方式的详细说明，并不构成对本发明保护范围的限定。任何在本发明的精神和原则之内所作的修改、等同替换和改进等，均应包含在本发明的权利要求保护范围之内。

Claims (10)

  1. 一种无线通信网络的动态优化方法，其特征在于，包括步骤：
    侦听相邻小区的信号；
    判断侦听到的相邻小区的信号是否存在干扰；若存在，生成优化调整方案，并根据生成的优化调整方案对当前小区或者发出干扰信号的该相邻小区进行调整。
  2. 根据权利要求1所述的无线通信网络的动态优化方法，其特征在于：
    所述优化调整方案包括：调高当前小区的发射功率；
    或者
    所述优化调整方案包括：为当前小区选取较为纯净的频点来重新配置小区。
  3. 根据权利要求1所述的无线通信网络的动态优化方法，其特征在于：
    当相邻小区的Qos超过设定上限值时，所述优化调整方案包括：下调该相邻小区的天线的下倾角、或者调小该相邻小区的发射功率；
    当相邻小区的Qos低于设定下限值时，所述优化调整方案包括：为该相邻小区重新选取较为纯净的频点，在满足该相邻小区Qos的情况下为该相邻小区设置最小的发射功率；
    当相邻小区的Qos位于预设范围内时，所述优化调整方案包括：调高当前小区的发射功率\或者为当前小区重新选取较为纯净的频点，在满足该当前小区Qos的情况下设置最小的发射功率。
  4. 根据权利要求1至3任意一项所述的无线通信网络的动态优化方法，其特征在于，判断侦听到的相邻小区的信号是否存在干扰的方式具体包括：
    对于GSM系统，当在同一时间同一频率上，侦听到的信号功率大于第一预设门限值时，判定侦听到的信号存在干扰；
    对于TD-SCDMA、CDMA、CDMA2000、WCDMA、或者LTE系统，当在同一时域、同一频域且同一码域上，侦听到的信号功率大于第二预设门限值时，判定侦听到的信号存在干扰；对于不同的码域，当侦听到的信号功率减去编码增益大于第三预设门限值时，判定侦听到的信号存在干扰，所述第二预设门限值与所述第三预设门限值相同或者不相同。
  5. 一种无线通信网络的动态优化装置，其特征在于，包括：
    设置在RRU下行链路的侦听功能链路，用于侦听相邻小区的信号的频率和功率；
    干扰判断单元，用于根据侦听功能链路侦听的信号，判断相邻小区的信号是否存在干扰；
    优化方案生成单元，用于在所述干扰判断单元判断出存在干扰时，生成优化调整方案；
    调整单元，用于根据所述优化方案生成单元生成的优化调整方案，对当前小区或者发出干扰信号的该相邻小区进行优化调整。
  6. 根据权利要求5所述的无线通信网络的动态优化装置，其特征在于：
    所述干扰判断单元具有多个，分别设置在各RRU处，所述优化方案生成单元具有多个，分别设置在各RRU处，所述调整单元具有多个，分别设置在各RRU处；
    或者
    所述干扰判断单元具有多个，分别设置在各RRU处，所述优化方案生成单元具有一个，设置在BBU或者管理控制中心处，所述调整单元具有一个，设置在BBU或者管理控制中心处；
    或者
    所述干扰判断单元具有一个，设置在BBU或者管理控制中心处，所述优化方案生成单元具有一个，设置在BBU或者管理控制中心处，所述调整单元具有一个，设置在BBU或者管理控制中心处；
    或者
    所述上述干扰判断单元具有一个，设置在BBU或者管理控制中心处，所述优化方案调整单元具有一个，设置在BBU或者管理控制中心处，所述调整单元具有多个，分别设置在各RRU处。
  7. 根据权利要求5或6所述的无线通信网络的动态优化装置，其特征在于，所述管理控制中心为RNC或者OMC。
  8. 根据权利要求5或6所述的无线通信网络的动态优化装置，其特征在于，所述侦听功能链路包括：滤波器，与所述滤波器连接的低噪声放大器，输入端与所述低噪声放大器的输出端连接的ADC，输入端与所述ADC的输出端连接的数字信号处理单元。
  9. 根据权利要求7所述的无线通信网络的动态优化装置，其特征在于，所述侦听功能链路包括：滤波器，与所述滤波器连接的低噪声放大器，输入端与所述低噪声放大器的输出端连接的ADC，输入端与所述ADC的输出端连接的数字信号处理单元。
  10. 一种无线通信系统，其特征在于，包括如上述权利要求5至9任意一项所述的无线通信网络的动态优化装置。
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