CN101895924A - Method, device and system for controlling power of home Node B - Google Patents
Method, device and system for controlling power of home Node B Download PDFInfo
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- H—ELECTRICITY
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- H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
- H04W52/04—Transmission power control [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]
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- H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
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- H04W84/042—Public Land Mobile systems, e.g. cellular systems
- H04W84/045—Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B
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Abstract
Description
技术领域technical field
本发明涉及通信技术领域,特别是涉及一种家庭基站功率控制方法、装置及系统。The present invention relates to the field of communication technology, in particular to a method, device and system for power control of a home base station.
背景技术Background technique
随着移动通信用户数量的迅速增加以及用户需求的不断提高,移动通信系统设备也呈现出多样化的发展趋势。HNB(Home NodeB,家庭基站)作为一种小型化的基站,针对的是家庭、学校、企业等应用场景。基于HNB或HeNB的网络系统,可以有效改善室内覆盖,提高室内接入速率,减少时延,满足各种用户应用需求,同时还能够减少宏基站的负荷,使宏基站容量主要服务于室外或运动中用户。With the rapid increase in the number of mobile communication users and the continuous improvement of user needs, mobile communication system equipment also presents a diversified development trend. As a miniaturized base station, HNB (Home NodeB) is aimed at application scenarios such as homes, schools, and enterprises. The network system based on HNB or HeNB can effectively improve indoor coverage, increase indoor access rate, reduce delay, and meet various user application requirements. At the same time, it can also reduce the load of macro base stations, so that the capacity of macro base stations is mainly used for outdoor or sports. medium users.
HNB应用场景包括扩充容量场景和补充覆盖场景:扩充容量场景采用叠加式组网,即,在宏小区网络覆盖上面,叠加一层HNB微小区覆盖。在补充覆盖场景中,HNB微小区覆盖在宏小区网络覆盖的盲区。无论在上述哪种应用场景下,都会出现宏小区网络覆盖和HNB微小区覆盖重叠的现象。由于运营商可能采用多种频率方案,因此,HNB与宏基站使用相同频点的情况难以避免,从而导致HNB与宏基站之间的同频干扰,其具体影响表现为:当不具有接入HNB权限的UE(以下简称无权UE)移动到HNB微小区覆盖区域时,由于HNB信号较强,会对此UE产生强干扰,严重时将导致掉话,从而造成宏基站范围内的覆盖“死区”。HNB application scenarios include capacity expansion scenarios and supplementary coverage scenarios: the capacity expansion scenario adopts superimposed networking, that is, a layer of HNB micro cell coverage is superimposed on the macro cell network coverage. In the supplementary coverage scenario, the HNB micro cell covers the blind area covered by the macro cell network. No matter in any of the above application scenarios, there will be a phenomenon that the macro cell network coverage overlaps with the HNB micro cell coverage. Since the operator may adopt a variety of frequency schemes, it is unavoidable that the HNB and the macro base station use the same frequency point, resulting in co-frequency interference between the HNB and the macro base station. The specific impact is as follows: when there is no access to the HNB When an authorized UE (hereinafter referred to as unauthorized UE) moves to the coverage area of the HNB micro cell, due to the strong HNB signal, it will generate strong interference to the UE, and in severe cases, it will cause call drop, thus causing the coverage within the macro base station to be "dead". district".
发明内容Contents of the invention
为解决上述技术问题,本发明实施例提供了一种家庭基站功率控制方法、装置及系统,以解决HNB与宏基站之间的同频干扰问题,技术方案如下:In order to solve the above technical problems, embodiments of the present invention provide a home base station power control method, device and system to solve the same-frequency interference problem between HNB and macro base station, the technical solution is as follows:
本发明实施例提供一种家庭基站功率控制方法,应用于包括宏小区和微小区的通讯网络中,所述方法包括:An embodiment of the present invention provides a home base station power control method, which is applied to a communication network including a macro cell and a micro cell, and the method includes:
确定有用户设备UE进入家庭基站HNB信号所覆盖的微小区;Determining that a user equipment UE enters the micro cell covered by the signal of the home base station HNB;
确定所述UE不具有接入所述HNB的权限;determining that the UE does not have the right to access the HNB;
获得所述UE的测量报告,所述测量报告中,包括所述UE所处位置的宏小区信号质量信息;Obtaining a measurement report of the UE, where the measurement report includes the signal quality information of the macro cell where the UE is located;
根据所述宏小区信号质量信息确定所述微小区的信号对于所述宏小区的信号存在同频干扰,降低所述HNB的发射功率。It is determined according to the signal quality information of the macro cell that the signal of the micro cell has co-channel interference with the signal of the macro cell, and the transmission power of the HNB is reduced.
本发明实施例还提供一种家庭基站功率控制装置,应用于包括宏小区和微小区的通讯网络中,所述装置包括:The embodiment of the present invention also provides a home base station power control device, which is applied to a communication network including a macro cell and a micro cell, and the device includes:
UE检测单元,用于确定有用户设备UE进入家庭基站HNB信号所覆盖的微小区;a UE detection unit, configured to determine that a user equipment UE enters a micro cell covered by a home base station HNB signal;
UE鉴权单元,用于确定所述UE不具有接入所述HNB的权限;a UE authentication unit, configured to determine that the UE does not have the right to access the HNB;
测量报告获得单元,用于获得所述UE的测量报告,所述测量报告中,包括所述UE所处位置的宏小区信号质量信息;a measurement report obtaining unit, configured to obtain a measurement report of the UE, where the measurement report includes signal quality information of a macro cell where the UE is located;
功率调整单元,用于根据所述宏小区信号质量信息确定所述微小区的信号对于宏小区的信号存在同频干扰,降低所述HNB的发射功率。A power adjustment unit, configured to determine, according to the macro cell signal quality information, that the signal of the micro cell has co-channel interference with the signal of the macro cell, and reduce the transmission power of the HNB.
本发明实施例还提供一种家庭基站系统,包括家庭基站以及前述的家庭基站功率控制装置。An embodiment of the present invention also provides a home base station system, including a home base station and the aforementioned device for controlling power of the home base station.
本发明实施例所提供的技术方案,当无权UE进入HNB微小区覆盖区域后,根据该UE的所在的宏小区的信号质量,调整HNB的发射功率,从而降低HNB对宏小区的干扰,减少无权UE在HNB微小区覆盖区域的掉话现象。According to the technical solution provided by the embodiment of the present invention, when the unprivileged UE enters the coverage area of the HNB micro cell, the transmission power of the HNB is adjusted according to the signal quality of the macro cell where the UE is located, thereby reducing the interference of the HNB to the macro cell and reducing the The call drop phenomenon of the unlicensed UE in the coverage area of the HNB micro cell.
附图说明Description of drawings
为了更清楚地说明本发明实施例或现有技术中的技术方案,下面将对实施例或现有技术描述中所需要使用的附图作简单的介绍,显而易见地,下面描述中的附图仅仅是本发明的一些实施例,对于本领域普通技术人员来讲,还可以根据这些附图获得其他的附图。In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings.
图1为本发明实施例的一种家庭基站功率控制方法流程图;FIG. 1 is a flowchart of a power control method for a home base station according to an embodiment of the present invention;
图2为本发明实施例的一种家庭基站功率控制方法信令流程图;FIG. 2 is a signaling flowchart of a home base station power control method according to an embodiment of the present invention;
图3为本发明实施例的一种根据测量报告进行家庭基站发射功率调整的方法流程图;FIG. 3 is a flow chart of a method for adjusting the transmit power of a home base station according to a measurement report according to an embodiment of the present invention;
图4为本发明实施例的另一种根据测量报告进行家庭基站发射功率调整的方法流程图;FIG. 4 is a flow chart of another method for adjusting the transmit power of a home base station according to a measurement report according to an embodiment of the present invention;
图5为本发明实施例的家庭基站功率控制装置的结构示意图;FIG. 5 is a schematic structural diagram of a home base station power control device according to an embodiment of the present invention;
图6为本发明实施例的功率调整单元的一种结构示意图;FIG. 6 is a schematic structural diagram of a power adjustment unit according to an embodiment of the present invention;
图7为本发明实施例的功率调整单元的另一种结构示意图;FIG. 7 is another schematic structural diagram of a power adjustment unit according to an embodiment of the present invention;
图8为本发明实施例的功率调整单元的第三种结构示意图;FIG. 8 is a schematic diagram of a third structure of a power adjustment unit according to an embodiment of the present invention;
图9为本发明实施例的家庭基站功率控制系统的结构示意图。FIG. 9 is a schematic structural diagram of a home base station power control system according to an embodiment of the present invention.
具体实施方式Detailed ways
下面将结合本发明实施例中的附图,对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员所获得的所有其他实施例,都属于本发明保护的范围。The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by persons of ordinary skill in the art based on the embodiments of the present invention belong to the protection scope of the present invention.
图1为本发明实施例的一种HNB功率控制方法流程图,包括以下步骤:Fig. 1 is a kind of HNB power control method flowchart of the embodiment of the present invention, comprises the following steps:
S101,确定有用户设备UE进入家庭基站HNB信号所覆盖的微小区;S101. Determine that a user equipment UE has entered a micro cell covered by a signal of a home base station HNB;
S102,确定所述UE不具有接入所述HNB的权限;S102. Determine that the UE does not have the right to access the HNB;
S103,获得所述UE的测量报告,所述测量报告中,包括所述UE所处位置的宏小区信号质量信息;S103. Obtain a measurement report of the UE, where the measurement report includes macro cell signal quality information where the UE is located;
S104,根据所述宏小区信号质量信息确定所述微小区的信号对于所述宏小区的信号存在同频干扰,降低所述HNB的发射功率。S104. Determine, according to the macro cell signal quality information, that the signal of the micro cell has co-channel interference with the signal of the macro cell, and reduce the transmit power of the HNB.
上述方法各步骤的执行主体,可以是HNB本身,也可以是独立于HNB的一个功能实体。应用上述方案,当无权UE进入HNB微小区覆盖区域后,根据该UE的所在的宏小区的信号质量,调整HNB的发射功率,从而降低HNB对宏小区的同频干扰,减少无权UE在HNB微小区覆盖区域的掉话现象。The subject of execution of each step of the above method may be the HNB itself, or a functional entity independent of the HNB. Applying the above solution, when the unlicensed UE enters the coverage area of the HNB micro cell, the transmit power of the HNB is adjusted according to the signal quality of the macro cell where the UE is located, thereby reducing the co-channel interference of the HNB to the macro cell and reducing the unlicensed UE’s Call drop phenomenon in the coverage area of HNB microcell.
下面将以由HNB自身执行功率控制为例,结合具体的信令流程,对本发明实施例的HNB功率控制方法进行说明。In the following, the HNB power control method in the embodiment of the present invention will be described by taking the power control performed by the HNB itself as an example, combined with a specific signaling flow.
图2所示为本发明实施例的HNB功率控制方法信令流程图,包括以下步骤:Fig. 2 shows the signaling flowchart of the HNB power control method according to the embodiment of the present invention, including the following steps:
S201,UE向HNB发送LAU/RAU消息。S201, the UE sends a LAU/RAU message to the HNB.
假设UE初始驻留在宏小区中,当UE移动至HNB发射信号覆盖的微小区后,首先会与HNB建立RRC(Radio Resource Control,无线资源控制)连接,RRC连接建立完成之后,UE将向HNB发起位置更新过程。Assuming that the UE initially resides in the macro cell, when the UE moves to the micro cell covered by the HNB transmission signal, it will first establish an RRC (Radio Resource Control, radio resource control) connection with the HNB. After the RRC connection is established, the UE will send the HNB Initiates the location update process.
在本实施例中,UE向HNB发送LAU(Location Area Update,位置更新)和/或RAU(Routing Area Update,路由区更新)消息。HNB收到LAU和/或RAU消息后,可以确定有UE进入自身的信号覆盖区域。In this embodiment, the UE sends a LAU (Location Area Update, location update) and/or RAU (Routing Area Update, routing area update) message to the HNB. After receiving the LAU and/or RAU message, the HNB can determine that there is a UE entering its own signal coverage area.
在本实施例中,HNB通过对LAU和/或RAU消息进行监测,从而确定是否有UE进入自身覆盖区域。可以理解的是,HNB也可以采用其他的方式(例如监测UE发送的RRC建立请求消息)确定有UE进入HNB微小区覆盖区域,本发明实施例对此并不进行限定。In this embodiment, the HNB determines whether a UE enters its own coverage area by monitoring the LAU and/or RAU messages. It can be understood that the HNB may also use other methods (for example, monitoring the RRC establishment request message sent by the UE) to determine that there is a UE entering the coverage area of the HNB micro cell, which is not limited in this embodiment of the present invention.
S202,HNB对UE的接入权限进行判断。S202, the HNB judges the access right of the UE.
本发明实施例是针对无权UE在HNB发射信号覆盖的微小区所存在的同频干扰状况提出,在本步骤中,HNB检查进入覆盖区域的UE是否有接入HNB的权限,如果鉴权未通过,则进一步执行后续步骤,通过功率控制来降低HNB对宏小区的干扰。The embodiment of the present invention is proposed for the co-channel interference situation existing in the small cell covered by the transmission signal of the HNB by the unauthorized UE. In this step, the HNB checks whether the UE entering the coverage area has the authorization to access the HNB. If the method is passed, the following steps are further performed to reduce the interference of the HNB to the macro cell through power control.
如果UE具有接入HNB的权限,则允许UE正常驻留在UE所处位置的微小区中,不需要继续执行后续步骤。If the UE has the right to access the HNB, the UE is allowed to normally camp on the micro cell where the UE is located, and there is no need to continue to perform subsequent steps.
S203,HNB向UE发送测量控制消息。S203, the HNB sends a measurement control message to the UE.
HNB确定新进入覆盖区域的UE为无权UE后,发起后续的功率控制流程:首先向UE发送measurement control(测量控制)消息,指示UE对信号质量信息进行测量。After the HNB determines that the UE newly entering the coverage area is an unprivileged UE, it initiates a subsequent power control process: first, it sends a measurement control (measurement control) message to the UE, instructing the UE to measure signal quality information.
S204,UE将测量报告消息上报给HNB。S204, the UE reports the measurement report message to the HNB.
UE对宏小区或HNB的信号质量进行测量,并将测量结果携带于measurement report(测量报告)消息中发送给HNB。The UE measures the signal quality of the macro cell or the HNB, and sends the measurement result to the HNB in a measurement report (measurement report) message.
S205,HNB根据UE的测量报告,调整发射功率。S205, the HNB adjusts the transmission power according to the measurement report of the UE.
HNB收集UE的测量报告,并对测量报告进行分析,根据分析结果对HNB的发射功率进行调整,降低HNB对宏小区的干扰。The HNB collects the measurement reports of the UE, analyzes the measurement reports, and adjusts the transmission power of the HNB according to the analysis results to reduce the interference of the HNB to the macro cell.
其中,UE发送的测量报告中,可以包括宏小区的信号质量信息,例如宏小区的接收信号码功率RSCP_macro、宏小区的码片能量与干扰功率密度比Ec/Io_macro等。HNB可以对宏小区的信号质量信息进行分析,判断是否存在同频干扰,并且对HNB的发射功率进行相应调整,降低HNB对宏小区的干扰。The measurement report sent by the UE may include signal quality information of the macro cell, such as the received signal code power RSCP_macro of the macro cell, the chip energy to interference power density ratio Ec/Io_macro of the macro cell, and the like. The HNB can analyze the signal quality information of the macro cell to determine whether there is co-channel interference, and adjust the transmission power of the HNB accordingly to reduce the interference of the HNB to the macro cell.
此外,在UE发送的测量报告中,还可以进一步包括HNB的信号质量信息,例如HNB的接收信号码功率RSCP_micro。HNB根据宏小区及微小区之间的信号质量的相互关系,对发射功率进行调整,可以在降低HNB发射信号对宏小区信号的干扰的同时,保证HNB的覆盖效果。In addition, the measurement report sent by the UE may further include signal quality information of the HNB, such as the received signal code power RSCP_micro of the HNB. The HNB adjusts the transmission power according to the relationship between the signal quality between the macro cell and the micro cell, which can reduce the interference of the HNB transmission signal to the macro cell signal and ensure the coverage effect of the HNB.
图3所示为本发明实施例所提供的一种根据测量报告进行HNB发射功率调整的方法流程图,包括以下步骤:Figure 3 is a flow chart of a method for adjusting HNB transmit power according to a measurement report provided by an embodiment of the present invention, including the following steps:
S301,判断UE是否处于宏小区基站覆盖盲区,如果是,则执行S302,否则结束功率调整流程。S301, judging whether the UE is in a coverage blind area of the macro cell base station, if so, performing S302, otherwise ending the power adjustment procedure.
当UE的宏小区接收信号码功率RSCP_macro很小时,说明UE位于宏小区的弱覆盖区域,也可以称为覆盖盲区。当UE处于宏小区基站覆盖盲区时,即使不存在HNB的干扰,也无法保证正常通话。在这种情况下,HNB的作用是补充宏小区基站覆盖的盲区,可以不需要对HNB的发射功率进行调整,以保证HNB的覆盖效果。When the received signal code power RSCP_macro of the macro cell of the UE is small, it indicates that the UE is located in a weak coverage area of the macro cell, which may also be called a coverage hole. When the UE is in the coverage blind area of the macro cell base station, even if there is no interference from the HNB, normal calls cannot be guaranteed. In this case, the function of the HNB is to supplement the blind area covered by the base station of the macro cell, and there is no need to adjust the transmission power of the HNB to ensure the coverage effect of the HNB.
在实际应用中,可以将调整门限值RSCP_th设置为-90dBm,即判断:In practical applications, the adjustment threshold RSCP_th can be set to -90dBm, that is, to judge:
RSCP_macro>-90dBmRSCP_macro>-90dBm
是否成立,如果是,则进一步执行后续步骤,否则结束功率调整流程。Whether it is true, if yes, then further perform subsequent steps, otherwise end the power adjustment process.
S302,判断宏小区的Ec/Io是否小于预设的调整门限值。如果是,则执行S303,否则结束功率调整流程。S302. Determine whether the Ec/Io of the macro cell is smaller than a preset adjustment threshold. If yes, execute S303, otherwise end the power adjustment procedure.
本实施例中,根据宏小区的码片能量与干扰功率密度比Ec/Io_macro来评估干扰情况。当Ec/Io_macro小于一定的门限值时,认为存在较强的同频干扰,可能会影响无权UE在宏小区的正常通话,因此需要进一步执行后续步骤对HNB的发射功率进行调整。In this embodiment, the interference situation is evaluated according to the chip energy-to-interference power density ratio Ec/Io_macro of the macro cell. When Ec/Io_macro is less than a certain threshold value, it is considered that there is strong co-channel interference, which may affect the normal call of the unlicensed UE in the macro cell, so further steps need to be performed to adjust the transmit power of the HNB.
在实际应用中,可以将调整门限值Ec/Io_th设置为-18dB,即判断:In practical applications, the adjustment threshold Ec/Io_th can be set to -18dB, that is, to judge:
Ec/Io_macro<-18dBEc/Io_macro<-18dB
是否成立,如果是,则进一步执行后续步骤,否则结束功率调整流程。Whether it is true, if yes, then further perform subsequent steps, otherwise end the power adjustment process.
S303,降低HNB的发射功率。S303. Reduce the transmit power of the HNB.
当确定无权UE不处于宏小区基站覆盖盲区、并且存在较强的同频干扰时,为保证宏小区的信号质量,可以适当降低HNB的发射功率,以减小HNB 发射的信号对宏小区信号的干扰。可以理解的是,为了优先保证宏小区的信号质量,也可以将HNB的发射功率全部关闭。When it is determined that the unlicensed UE is not in the coverage blind area of the macro cell base station and there is strong co-channel interference, in order to ensure the signal quality of the macro cell, the transmission power of the HNB can be appropriately reduced to reduce the impact of the signal transmitted by the HNB on the macro cell signal. interference. It can be understood that, in order to give priority to ensuring the signal quality of the macro cell, the transmit power of the HNB may also be all turned off.
本实施例中,HNB通过对宏小区的信号质量信息进行分析,在确定UE不处于宏小区基站覆盖盲区、以及存在较强同频干扰的情况下,对HNB的发射功率进行相应调整,从而降低HNB对宏小区的干扰。In this embodiment, by analyzing the signal quality information of the macro cell, the HNB adjusts the transmit power of the HNB accordingly when it is determined that the UE is not in the coverage blind area of the base station of the macro cell and there is strong co-channel interference, thereby reducing the Interference from HNB to macro cell.
可以理解的是,在实际应用中,上述的判断步骤S301和S302的执行顺序也可以交换,或者并列执行。并且,也可以不执行S301,即不考虑UE是否处于宏小区基站覆盖盲区,直接根据Ec/Io_macro确定是否存在同频干扰,然后确定是否对HNB的发射功率进行相应调整,这些并不影响本发明技术方案的实现。It can be understood that, in practical applications, the execution order of the above-mentioned judging steps S301 and S302 may also be exchanged, or executed in parallel. Moreover, S301 may not be executed, that is, regardless of whether the UE is in the coverage blind area of the macro cell base station, directly determine whether there is co-channel interference according to Ec/Io_macro, and then determine whether to adjust the transmit power of the HNB accordingly, which does not affect the present invention Realization of technical solutions.
图4所示为本发明实施例所提供的另一种根据测量报告进行HNB发射功率调整的方法流程图,包括以下步骤:FIG. 4 is a flow chart of another method for adjusting HNB transmission power according to a measurement report provided by an embodiment of the present invention, including the following steps:
S401,判断UE是否处于宏小区基站覆盖盲区,如果是,则执行S302,否则结束功率调整流程。S401, judging whether the UE is in the coverage blind area of the macro cell base station, if yes, execute S302, otherwise end the power adjustment procedure.
S402,判断宏小区的Ec/Io是否小于预设的调整门限值,如果是,则执行S403,否则结束功率调整流程。S402, judging whether the Ec/Io of the macro cell is smaller than a preset adjustment threshold, if yes, execute S403, otherwise end the power adjustment procedure.
其中,S401-S402的具体实现可以与S301-S302类似,本实施例不再进行重复说明。Wherein, the specific implementation of S401-S402 may be similar to that of S301-S302, and the description will not be repeated in this embodiment.
S403,判断HNB到UE的路径损耗是否小于HNB的边界路径损耗门限值。S403. Determine whether the path loss from the HNB to the UE is smaller than the boundary path loss threshold of the HNB.
为了保证HNB的覆盖范围,在相关协议中规定了HNB到UE的路径损耗PL(Path Loss)必须小于边界路径损耗门限值PL_th,其中PL_th的典型值为47dB,如果PL<PL_th,说明当前的边缘的信号较强,可以适当降低发射功率。In order to ensure the coverage of HNB, it is stipulated in related agreements that the path loss PL (Path Loss) from HNB to UE must be less than the boundary path loss threshold PL_th, where the typical value of PL_th is 47dB. If PL<PL_th, it means that the current The signal at the edge is stronger, and the transmit power can be appropriately reduced.
其中PL的定义如下:where PL is defined as follows:
PL=P_pilot-RSCP_microPL=P_pilot-RSCP_micro
在本发明实施例中,测量报告是由刚进入HNB微小区覆盖区域的UE所上报的,因此可以认为该UE当前处于HNB的覆盖边缘。HNB首先根据UE测量报告中的RSCP_micro,以及自身当前的发射功率P_pilot计算得到HNB到UE的PL值,将该值与PL_th进行比较,如果PL<PL_th,则进一步执行后续步骤,否则结束功率调整流程。In the embodiment of the present invention, the measurement report is reported by the UE that has just entered the coverage area of the small cell of the HNB, so it can be considered that the UE is currently at the coverage edge of the HNB. The HNB first calculates the PL value from the HNB to the UE based on the RSCP_micro in the UE measurement report and its own current transmit power P_pilot, and compares the value with PL_th, and if PL<PL_th, proceed to further steps, otherwise end the power adjustment process .
S404,降低HNB的发射功率。S404, reduce the transmit power of the HNB.
在本实施例中,由于要在降低干扰的同时保证HNB的覆盖效果,因此需要对发射功率的降低幅度进行限定。在实际应用中,可以近似将PL-PL_th的值作为最大允许的发射功率降低幅度。In this embodiment, since the coverage effect of the HNB is to be ensured while reducing the interference, it is necessary to limit the reduction range of the transmission power. In practical applications, the value of PL-PL_th can be approximately used as the maximum allowable transmission power reduction range.
在实际应用中,要保证HNB微小区覆盖区域内的无权UE正常通话,可能并不需要将发射功率降低至最大幅度,另一方面,进入HNB微小区覆盖区域内的UE,也不一定立即进行业务。基于上述情况,在本发明的另一个实施例中,也可以采用逐步降低HNB发射功率的方式,也就是说,当确定需要降低HNB发射功率时,并不是一次调整到位,而是按照小于(PL-PL_th)的步长值,逐步降低HNB的发射功率。其中,降低HNB发射功率的方式可以是等步长调整,例如每次降低2dB,也可以采用增量调整的方式,例如第一次降低2dB、第二次降低3dB、第三处降低4dB......本实施例对具体的调整方式并不需要进行限定。每次调整之后,等待下一次有UE进入HNB微小区覆盖区域时,再重新发起判断流程,确定是否需要再次调整。应用该方案,可以在降低HNB对宏小区的干扰的同时,尽量减小对HNB的发射功率的降低程度,并且根据HNB的边界路径损耗门限值PL_th规定了最大允许的发射功率降低幅度,保证HNB的覆盖效果。In practical applications, it may not be necessary to reduce the transmit power to the maximum level to ensure normal communication of unprivileged UEs within the coverage area of the HNB microcell. On the other hand, UEs entering the coverage area of the HNB microcell may not immediately conduct business. Based on the above situation, in another embodiment of the present invention, the method of gradually reducing the HNB transmission power can also be adopted, that is to say, when it is determined that the HNB transmission power needs to be reduced, it is not adjusted in place at one time, but according to less than (PL -PL_th) to gradually reduce the transmit power of the HNB. Among them, the method of reducing the HNB transmission power can be adjusted by equal steps, such as reducing 2dB each time, or by incremental adjustment, such as reducing 2dB for the first time, reducing 3dB for the second time, and reducing 4dB for the third time.. ...This embodiment does not need to limit the specific adjustment method. After each adjustment, wait for the next time a UE enters the coverage area of the HNB micro cell, and then re-initiate the judgment process to determine whether it needs to be adjusted again. Applying this scheme, while reducing the interference of HNB to the macro cell, it can minimize the reduction of the transmission power of the HNB, and the maximum allowable transmission power reduction range is specified according to the boundary path loss threshold value PL_th of the HNB, ensuring Coverage effect of HNB.
与前一实施例相比,本实施例在确定是否对发射功率进行调整时,进一步考虑了HNB微小区的信号质量信息,可以在降低HNB发射信号对宏小区信号的干扰的同时,保证HNB的覆盖效果。可以理解的是,在实际应用中,上述的判断步骤S401、S402、S403的执行顺序也可以交换,或者并列执行,并且,同样可以不考虑UE是否处于宏小区基站覆盖盲区,即不执行S401,这些并不影响本发明技术方案的实现。Compared with the previous embodiment, this embodiment further considers the signal quality information of the HNB micro cell when determining whether to adjust the transmit power, and can reduce the interference of the HNB transmit signal to the macro cell signal while ensuring the HNB's overlay effect. It can be understood that, in practical applications, the execution order of the above-mentioned judgment steps S401, S402, and S403 can also be exchanged, or executed in parallel, and it is also possible to ignore whether the UE is in the coverage blind area of the macro cell base station, that is, not to execute S401, These do not affect the realization of the technical solution of the present invention.
可以理解的是,上述本发明实施例所提供的功率控制方案,可以是自动执行,即:实时检测是否有UE进入HNB微小区覆盖区域并执行后续流程;也可以是周期性执行或人工触发执行,对于周期性执行或人工触发执行的方式,可以预先设置一个检测时长T0,在T0的时长范围内检测是否有UE进入HNB微小区覆盖区域并执行后续流程。对于根据PL值进行功率调整的方案,无论采用上述哪种方式,当HNB的发射功率已经调整到最小值后,都可以停止对功率的调整。It can be understood that the power control scheme provided by the above-mentioned embodiments of the present invention can be executed automatically, that is, it can detect in real time whether a UE enters the coverage area of the HNB micro cell and execute the follow-up procedure; it can also be executed periodically or manually triggered , for periodic execution or manual trigger execution, a detection duration T0 can be preset, and within the duration of T0, it is detected whether there is a UE entering the coverage area of the HNB micro cell and subsequent procedures are executed. For the solution of power adjustment according to the PL value, no matter which of the above methods is adopted, when the transmit power of the HNB has been adjusted to the minimum value, the power adjustment can be stopped.
此外,如果HNB掉电,则再次开机后,可以将HNB的发射功率恢复为初始值。In addition, if the HNB is powered off, the transmit power of the HNB can be restored to the initial value after it is turned on again.
相应于上面的方法实施例,本发明实施例还提供一种家庭基站功率控制装置,参见图5所示:包括:Corresponding to the above method embodiment, the embodiment of the present invention also provides a home base station power control device, as shown in FIG. 5 : including:
UE检测单元510,用于确定有用户设备UE进入家庭基站HNB信号所覆盖的微小区;The
UE鉴权单元520,用于确定所述UE不具有接入所述HNB的权限;
测量报告获得单元530,用于获得所述UE的测量报告,所述测量报告中,包括所述UE所处位置的宏小区信号质量信息;A measurement
功率调整单元540,用于根据所述宏小区信号质量信息确定所述微小区的信号对于宏小区的信号存在同频干扰,降低所述HNB的发射功率。The
应用上述控制装置,当无权UE进入HNB微小区覆盖区域后,根据该UE的所在的宏小区的信号质量,调整HNB的发射功率,从而降低HNB发射信号对宏小区信号的干扰,减少无权UE在HNB微小区覆盖区域的掉话现象。Applying the above-mentioned control device, when the unprivileged UE enters the coverage area of the HNB micro cell, the transmission power of the HNB is adjusted according to the signal quality of the macro cell where the UE is located, thereby reducing the interference of the HNB transmitted signal to the signal of the macro cell and reducing the unprivileged UE. The call drop phenomenon of the UE in the coverage area of the HNB micro cell.
其中,所述UE检测单元可以根据接收到的位置更新LAU消息和/或路由区更新RAU消息,确定有UE进入HNB信号所覆盖的微小区。Wherein, the UE detection unit may determine that a UE enters the micro cell covered by the HNB signal according to the received location update LAU message and/or routing area update RAU message.
所述测量报告获得单元530,可以包括:The measurement
控制消息发送子单元,用于向所述UE发送测量控制消息;a control message sending subunit, configured to send a measurement control message to the UE;
测量报告接收子单元,用于接收所述UE根据所述测量控制消息发送的测量报告,所述测量报告中,包括所述UE所处位置的宏小区信号质量信息。The measurement report receiving subunit is configured to receive the measurement report sent by the UE according to the measurement control message, where the measurement report includes the signal quality information of the macro cell where the UE is located.
所述测量报告获得单元530获得的宏小区信号质量信息可以包括:The macro cell signal quality information obtained by the measurement
宏小区的接收信号码功率RSCP_macro和宏小区的码片能量与干扰功率密度比Ec/Io_macro。The received signal code power RSCP_macro of the macro cell and the chip energy to interference power density ratio Ec/Io_macro of the macro cell.
参见图6所示,为所述功率调整单元540的一种结构示意图,可以包括:Referring to FIG. 6, it is a schematic structural diagram of the
第一判断子单元541,用于判断Ec/Io_macro是否小于预设的调整门限值;The
功率调整子单元544,用于在所述第一判断子单元541的判断结果为是时,降低所述HNB的发射功率。The
所述测量报告获得单元530获得的测量报告中,还可以包括宏小区的接收信号码功率RSCP_macro。图7所示为功率调整单元540的另一种结构示意图,在图6所示基础上,进一步包括:The measurement report obtained by the measurement
第二判断子单元542,用于在所述第一判断子单元541进行判断之前,根据RSCP_macro,判断所述UE是否处于宏小区基站覆盖盲区;如果否,则触发所述第一判断子单元541进一步判断Ec/Io_macro是否小于预设的调整门限值。The
应用图7所示的功率调整单元,通过对宏小区的信号质量信息进行分析,在确定UE处于宏小区基站覆盖盲区、以及存在同频干扰的情况下,对HNB的发射功率进行相应调整,从而降低HNB对宏小区的干扰。Applying the power adjustment unit shown in Figure 7, by analyzing the signal quality information of the macro cell, when it is determined that the UE is in the coverage blind area of the base station of the macro cell and there is co-channel interference, the transmit power of the HNB is adjusted accordingly, so that Reduce the interference of HNB to the macro cell.
所述测量报告获得单元530获得的测量报告中,还可以包括所述UE所处位置的微小区的信号质量信息,该信息可以是HNB的接收信号码功率RSCP_micro。图8所示为功率调整单元540的另一种结构示意图,在图7所示基础上,进一步包括:The measurement report obtained by the measurement
第三判断子单元543,用于在所述第一判断子单元541的判断结果为是之后、所述功率调整子单元544降低HNB的发射功率之前,根据所述RSCP_micro计算得到所述HNB到所述UE的路径损耗PL;判断所述PL是否小于HNB的边界路径损耗门限值PL_th;如果是,则触发所述功率调整子单元544降低所述HNB的发射功率。The
其中,所述功率调整子单元544对HNB的发射功率的最大降低幅度可以为PL-PL_th。所述功率调整子单元544可以以小于(PL-PL_th)的步长值,逐步降低HNB的发射功率。Wherein, the maximum reduction range of the transmission power of the HNB by the
应用图8所示的功率调整单元,根据宏小区及微小区的信号质量的相互关系,对发射功率进行调整,可以在降低HNB对宏小区的干扰的同时,保证HNB的覆盖效果。The power adjustment unit shown in Figure 8 is used to adjust the transmission power according to the relationship between the signal quality of the macro cell and the micro cell, which can reduce the interference of the HNB to the macro cell and ensure the coverage effect of the HNB.
本发明实施例所提供的家庭基站功率控制装置,可以是HNB,也可以内置于HNB中,还也可以是独立于HNB的功能实体。针对家庭基站功率控制装置独立于HNB的情况,本发明实施例还提供一种家庭基站功率控制系统,参见图9所示,该系统包括家庭基站910和家庭基站功率控制装置920。其中,所述家庭基站功率控制装置可以与前述的家庭基站功率控制装置相同,这里不再重复说明。The home base station power control device provided by the embodiment of the present invention may be an HNB, may also be built in the HNB, or may be a functional entity independent of the HNB. For the situation that the home base station power control device is independent of the HNB, the embodiment of the present invention also provides a home base station power control system, as shown in FIG. 9 , the system includes a
对于装置或系统实施例而言,由于其基本相应于方法实施例,所以相关之处参见方法实施例的部分说明即可。以上所描述的装置或系统实施例仅仅是示意性的,其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性劳动的情况下,即可以理解并实施。As for the device or system embodiment, since it basically corresponds to the method embodiment, for related parts, please refer to the part of the description of the method embodiment. The device or system embodiments described above are only illustrative, and the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, It can be located in one place, or it can be distributed to multiple network elements. Part or all of the modules can be selected according to actual needs to achieve the purpose of the solution of this embodiment. It can be understood and implemented by those skilled in the art without creative effort.
在本申请所提供的几个实施例中,应该理解到,所揭露的系统,装置和方法,在没有超过本申请的精神和范围内,可以通过其他的方式实现。当前的实施例只是一种示范性的例子,不应该作为限制,所给出的具体内容不应该限制本申请的目的。例如,所述单元或子单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或多个子单元结合一起。另外,多个单元可以或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways without exceeding the spirit and scope of the present application. The present embodiment is only an exemplary example and should not be taken as a limitation, and the specific content given should not limit the purpose of the present application. For example, the division of the units or subunits is only a division of logical functions. In actual implementation, there may be other division methods, such as combining multiple units or multiple subunits. Also, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not implemented.
另外,所描述系统,装置和方法以及不同实施例的示意图,在不超出本申请的范围内,可以与其它系统,模块,技术或方法结合或集成。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。In addition, the described systems, devices and methods and schematic diagrams of different embodiments may be combined or integrated with other systems, modules, techniques or methods within the scope of the present application. In another point, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
以上所述仅是本发明的具体实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也应视为本发明的保护范围。The foregoing is only a specific embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, some improvements and modifications can also be made without departing from the principle of the present invention. It should be regarded as the protection scope of the present invention.
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