CN101159459B - Initial power control method, system and device - Google Patents

Initial power control method, system and device Download PDF

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CN101159459B
CN101159459B CN2007101882042A CN200710188204A CN101159459B CN 101159459 B CN101159459 B CN 101159459B CN 2007101882042 A CN2007101882042 A CN 2007101882042A CN 200710188204 A CN200710188204 A CN 200710188204A CN 101159459 B CN101159459 B CN 101159459B
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base station
travelling carriage
signal strength
target cell
path loss
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CN101159459A (en
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张立文
李臻
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Huawei Technologies Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—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
    • H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/06—TPC algorithms
    • H04W52/14—Separate analysis of uplink or downlink
    • H04W52/143—Downlink power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/18—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
    • H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. Transmission Power Control [TPC] or power classes
    • H04W52/04—Transmission power control [TPC]
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment

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Abstract

本发明实施例公开了一种初始功率控制方法，包括：计算移动台与基站之间的路径损耗；根据所述路径损耗及所分配的呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度；根据所述移动台接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。此外，本发明实施例还公开了一种初始功率控制系统及装置。本发明所公开的技术方案通过间接得到较准确的移动台接收到的下行信号强度信息，从而实现了初始阶段的功率控制，降低了对系统的干扰并节约了基站的功耗。

Figure 200710188204

The embodiment of the present invention discloses an initial power control method, including: calculating the path loss between the mobile station and the base station; predicting the transmission power received by the mobile station according to the path loss and the allocated transmission power intensity of the carrier frequency where the call is located Downlink signal strength: determine the power strength of the base station for power transmission according to the downlink signal strength received by the mobile station, and notify the base station to perform power transmission according to the power strength. In addition, the embodiment of the invention also discloses an initial power control system and device. The technical scheme disclosed by the invention realizes power control at the initial stage by indirectly obtaining relatively accurate downlink signal strength information received by the mobile station, reduces interference to the system and saves power consumption of the base station.

Figure 200710188204

Description

初始功率控制方法、系统及装置Initial power control method, system and device

技术领域technical field

本发明涉及移动通信技术，尤其涉及一种初始功率控制方法、系统及装置。The present invention relates to mobile communication technology, in particular to an initial power control method, system and device.

背景技术Background technique

在移动通信技术中，为了维持高质量的通信，又不对其他用户产生干扰，通常需要对基站的发射功率进行控制。目前，在全球移动通信系统(GSM)的功率控制中，基站控制器(BSC)需要在接收到移动台(MS)上报的一定数量的呼叫所在信道的测量报告后，对所接收的测量报告进行插值、滤波等处理，以处理丢失的测量报告并消除野点(毛刺)，并得到处理后的MS接收到的下行信号强度值，之后，将得到的MS接收到的下行信号强度值与理想的MS接收到的下行信号强度值相比较，通过功率控制算法，计算出基站(BTS)应调整至的功率级别，通知基站按照该功率级别进行功率发射。此外，考虑到在呼叫刚刚接入后以及小区切换刚刚完成后等初始情况的测量信息通常不够准确，因此进行功率控制时，会丢弃初始的几个测量报告，以保证功率控制算法的稳定性。In mobile communication technology, in order to maintain high-quality communication without causing interference to other users, it is usually necessary to control the transmit power of the base station. At present, in the power control of the Global System for Mobile Communications (GSM), the Base Station Controller (BSC) needs to perform measurement reports on the received measurement reports after receiving the measurement reports of a certain number of calling channels reported by the Mobile Station (MS). Interpolation, filtering and other processing to process lost measurement reports and eliminate outliers (burrs), and obtain the processed downlink signal strength value received by the MS, and then compare the obtained downlink signal strength value received by the MS with the ideal MS The received downlink signal strength values are compared, and the power level to which the base station (BTS) should be adjusted is calculated through a power control algorithm, and the base station is notified to perform power transmission according to this power level. In addition, considering that the measurement information in initial situations such as just after a call is connected and just after cell handover is usually not accurate enough, when power control is performed, the initial few measurement reports will be discarded to ensure the stability of the power control algorithm.

可见，现有技术中，进行功率控制时需要收集一定数量的测量报告并且会丢弃几个初始的测量报告，因此使得功率控制非常滞后，并且在呼叫接入以及小区切换的初始阶段无法进行功率控制，基站只能以最大功率进行发射，这势必增加系统的干扰，影响业务的质量，同时浪费基站的功耗。It can be seen that in the prior art, a certain number of measurement reports need to be collected and several initial measurement reports will be discarded when performing power control, so that the power control is very lagging, and power control cannot be performed in the initial stage of call access and cell handover , the base station can only transmit at the maximum power, which will inevitably increase the interference of the system, affect the quality of the service, and waste the power consumption of the base station.

发明内容Contents of the invention

有鉴于此，本发明实施例中一方面提供一种初始功率控制方法，另一方面提供一种初始功率控制系统及装置，以便实现初始阶段的功率控制，降低对系统的干扰，节约基站的功耗。In view of this, embodiments of the present invention provide an initial power control method on the one hand, and provide an initial power control system and device on the other hand, so as to realize power control in the initial stage, reduce interference to the system, and save power of the base station. consumption.

本发明实施例中提供的初始功率控制方法，包括：The initial power control method provided in the embodiment of the present invention includes:

在激活目标小区的业务信道时或移动台成功切换至目标小区时，基站控制器接收移动台上报的移动台接收到的目标小区的广播控制信道的信号强度，并根据所接收的移动台接收到的目标小区广播控制信道的信号强度计算所述移动台与目标小区所在基站之间的路径损耗；和/或，在激活业务信道时或移动台成功接入时，基站控制器获取移动台的实际发射功率，接收基站上报的基站测量到的上行信号强度，并根据所述基站测量到的上行信号强度及所述移动台的实际发射功率强度，计算得到所述移动台与所述基站之间的路径损耗；When activating the traffic channel of the target cell or when the mobile station successfully switches to the target cell, the base station controller receives the signal strength of the broadcast control channel of the target cell received by the mobile station reported by the mobile station, and according to the received The signal strength of the broadcast control channel of the target cell calculates the path loss between the mobile station and the base station where the target cell is located; and/or, when the traffic channel is activated or the mobile station successfully accesses, the base station controller acquires the actual transmit power, receiving the uplink signal strength measured by the base station reported by the base station, and calculating the power between the mobile station and the base station according to the uplink signal strength measured by the base station and the actual transmit power strength of the mobile station path loss;

基站控制器根据所述路径损耗及呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度；The base station controller predicts the downlink signal strength received by the mobile station according to the path loss and the transmit power strength of the carrier frequency where the call is located;

基站控制器根据预测得到的移动台接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。The base station controller determines the power intensity of the base station for power transmission according to the predicted downlink signal intensity received by the mobile station, and notifies the base station to perform power transmission according to the power intensity.

本发明实施例中提供的初始功率控制系统，包括：基站控制器、基站和移动台，其中，The initial power control system provided in the embodiment of the present invention includes: a base station controller, a base station and a mobile station, wherein,

所述基站控制器用于在激活目标小区的业务信道时或移动台成功切换至目标小区时，接收移动台上报的移动台接收到的目标小区的广播控制信道的信号强度，并根据所接收的移动台接收到的目标小区广播控制信道的信号强度计算所述移动台与目标小区所在基站之间的路径损耗；和/或，在激活业务信道时或移动台成功接入时，获取移动台的实际发射功率，接收基站上报的基站测量到的上行信号强度，并根据所述基站测量到的上行信号强度及所述移动台的实际发射功率强度，计算得到所述移动台与所述基站之间的路径损耗；根据所述路径损耗与所分配的呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度；根据所述移动台接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射；The base station controller is used to receive the signal strength of the broadcast control channel of the target cell received by the mobile station reported by the mobile station when the traffic channel of the target cell is activated or when the mobile station successfully switches to the target cell, and according to the received mobile station The signal strength of the broadcast control channel of the target cell received by the station calculates the path loss between the mobile station and the base station where the target cell is located; and/or, when the traffic channel is activated or the mobile station successfully accesses, obtain the actual transmit power, receiving the uplink signal strength measured by the base station reported by the base station, and calculating the power between the mobile station and the base station according to the uplink signal strength measured by the base station and the actual transmit power strength of the mobile station Path loss; predict the strength of the downlink signal received by the mobile station according to the path loss and the transmission power strength of the assigned carrier frequency; determine the power of the base station for power transmission according to the strength of the downlink signal received by the mobile station Intensity, informing the base station to perform power transmission according to the power intensity;

所述基站控制器包括：The base station controller includes:

路损计算模块，用于计算移动台与基站之间的路径损耗；The path loss calculation module is used to calculate the path loss between the mobile station and the base station;

信号强度计算模块，用于根据所述路损计算模块计算得到的路径损耗与呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度；The signal strength calculation module is used to predict the downlink signal strength received by the mobile station according to the path loss calculated by the path loss calculation module and the transmit power strength of the carrier frequency where the call is located;

功率控制模块，用于根据所述信号强度计算模块预测得到的移动台接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射；The power control module is used to determine the power strength of the base station for power transmission according to the downlink signal strength received by the mobile station predicted by the signal strength calculation module, and notify the base station to perform power transmission according to the power strength;

该基站控制器进一步包括：The base station controller further includes:

广播控制信道信号强度接收模块，用于在激活目标小区的业务信道时或移动台成功切换至目标小区时，接收移动台上报的移动台接收到的目标小区的广播控制信道的信号强度；The broadcast control channel signal strength receiving module is used to receive the signal strength of the broadcast control channel of the target cell received by the mobile station reported by the mobile station when the traffic channel of the target cell is activated or when the mobile station is successfully handed over to the target cell;

所述路损计算模块根据所述移动台接收到的目标小区的广播控制信道的信号强度及目标小区的广播控制信道所在载频的发射功率强度，计算所述移动台与目标小区所在基站之间的路径损耗；The path loss calculation module calculates the distance between the mobile station and the base station where the target cell is located according to the signal strength of the broadcast control channel of the target cell received by the mobile station and the transmit power intensity of the carrier frequency where the broadcast control channel of the target cell is located. path loss;

和/或，该基站控制器进一步包括：And/or, the base station controller further includes:

移动台发射功率获取模块，用于在激活业务信道时或移动台成功接入时，获取移动台的实际发射功率；The mobile station transmission power acquisition module is used to obtain the actual transmission power of the mobile station when the traffic channel is activated or when the mobile station successfully accesses;

上行信号强度接收模块，用于在激活业务信道时或移动台成功接入时，接收基站上报的基站测量到的上行信号强度；The uplink signal strength receiving module is used to receive the uplink signal strength measured by the base station reported by the base station when the traffic channel is activated or when the mobile station successfully accesses;

所述路损计算模块根据所述上行信号强度接收模块接收到的基站测量到的上行信号强度及所述移动台发射功率获取模块获取的移动台的实际发射功率强度，计算所述移动台与所述基站之间的路径损耗。The path loss calculation module calculates the relationship between the mobile station and the mobile station according to the uplink signal strength measured by the base station received by the uplink signal strength receiving module and the actual transmission power strength of the mobile station obtained by the mobile station transmission power acquisition module. path loss between the base stations.

本发明实施例中提供的初始功率控制装置，包括：The initial power control device provided in the embodiment of the present invention includes:

路损计算模块，用于计算移动台与基站之间的路径损耗；The path loss calculation module is used to calculate the path loss between the mobile station and the base station;

信号强度计算模块，用于根据所述路径损耗与系统分配的呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度；A signal strength calculation module, configured to predict the downlink signal strength received by the mobile station according to the path loss and the transmission power strength of the carrier frequency assigned by the system;

功率控制模块，用于根据所述移动台接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射；The power control module is used to determine the power intensity of the base station for power transmission according to the downlink signal intensity received by the mobile station, and notify the base station to perform power transmission according to the power intensity;

该装置进一步包括：The device further includes:

广播控制信道信号强度接收模块，用于在激活目标小区的业务信道时或移动台成功切换至目标小区时，接收移动台上报的移动台接收到的目标小区的广播控制信道的信号强度；The broadcast control channel signal strength receiving module is used to receive the signal strength of the broadcast control channel of the target cell received by the mobile station reported by the mobile station when the traffic channel of the target cell is activated or when the mobile station is successfully handed over to the target cell;

所述路损计算模块根据所述移动台接收到的目标小区的广播控制信道的信号强度及目标小区的广播控制信道所在载频的发射功率强度，计算所述移动台与目标小区所在基站之间的路径损耗；The path loss calculation module calculates the distance between the mobile station and the base station where the target cell is located according to the signal strength of the broadcast control channel of the target cell received by the mobile station and the transmit power intensity of the carrier frequency where the broadcast control channel of the target cell is located. path loss;

和/或，该装置进一步包括：And/or, the device further comprises:

移动台发射功率获取模块，用于在激活业务信道时或移动台成功接入时，获取移动台的实际发射功率；The mobile station transmission power acquisition module is used to obtain the actual transmission power of the mobile station when the traffic channel is activated or when the mobile station successfully accesses;

上行信号强度接收模块，用于在激活业务信道时或移动台成功接入时，接收基站上报的基站测量到的上行信号强度；The uplink signal strength receiving module is used to receive the uplink signal strength measured by the base station reported by the base station when the traffic channel is activated or when the mobile station successfully accesses;

所述路损计算模块根据所述上行信号强度接收模块接收到的基站测量到的上行信号强度及所述移动台发射功率获取模块获取的移动台的实际发射功率强度，计算所述移动台与所述基站之间的路径损耗。The path loss calculation module calculates the relationship between the mobile station and the mobile station according to the uplink signal strength measured by the base station received by the uplink signal strength receiving module and the actual transmission power strength of the mobile station obtained by the mobile station transmission power acquisition module. path loss between the base stations.

从上述方案可以看出，本发明实施例中通过计算移动台与基站之间的路径损耗，并根据所计算的路径损耗及所分配的呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度，即在呼叫接入以及小区切换的初始阶段，间接得到较准确的移动台接收到的下行信号强度信息，进而根据预测的移动台接收到的下行信号强度信息，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射，从而实现了初始阶段的功率控制，降低了对系统的干扰并节约了基站的功耗。It can be seen from the above scheme that in the embodiment of the present invention, the path loss between the mobile station and the base station is calculated, and according to the calculated path loss and the transmission power intensity of the allocated carrier frequency of the call, the signal received by the mobile station is predicted. Downlink signal strength, that is, in the initial stage of call access and cell handover, more accurate downlink signal strength information received by the mobile station is obtained indirectly, and then according to the predicted downlink signal strength information received by the mobile station, the power transmission of the base station is determined The power intensity of the base station is notified to perform power transmission according to the power intensity, so as to realize the power control in the initial stage, reduce the interference to the system and save the power consumption of the base station.

附图说明Description of drawings

图1为本发明实施例一中初始功率控制方法的示例性流程图；FIG. 1 is an exemplary flowchart of an initial power control method in Embodiment 1 of the present invention;

图2为本发明实施例一中初始功率控制装置的一个结构示意图；FIG. 2 is a schematic structural diagram of an initial power control device in Embodiment 1 of the present invention;

图3为本发明实施例一中初始功率控制装置的又一个结构示意图；FIG. 3 is another structural schematic diagram of the initial power control device in Embodiment 1 of the present invention;

图4为本发明实施例二中初始功率控制方法的示例性流程图；FIG. 4 is an exemplary flowchart of an initial power control method in Embodiment 2 of the present invention;

图5为本发明实施例二中初始功率控制装置的结构示意图。FIG. 5 is a schematic structural diagram of an initial power control device in Embodiment 2 of the present invention.

具体实施方式Detailed ways

本发明实施例中，考虑到在呼叫接入以及小区间切换等情况的初始阶段，由于不能及时获取MS上报的呼叫所在信道的下行测量报告(即移动台接收到的下行信号强度信息)或者所获取的测量信息不够准确等情况，通过计算MS与基站之间的路径损耗，并利用所计算的路径损耗以及呼叫所在信道的载频(简称呼叫所在载频)的发射功率强度对MS接收到的下行信号强度信息进行预测，进而根据预测的结果，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。In the embodiment of the present invention, it is considered that in the initial stage of call access and inter-cell handover, the downlink measurement report (that is, the downlink signal strength information received by the mobile station) or the downlink measurement report of the channel where the call is reported by the MS cannot be obtained in time If the obtained measurement information is not accurate enough, by calculating the path loss between the MS and the base station, and using the calculated path loss and the transmit power intensity of the carrier frequency of the calling channel (abbreviated as the calling carrier frequency) The downlink signal strength information is predicted, and then according to the prediction result, the power strength of the base station for power transmission is determined, and the base station is notified to perform power transmission according to the power strength.

相应地，本发明实施例中的初始功率控制系统，包括：BSC、基站和MS。其中，BSC用于计算MS与基站之间的路径损耗，根据所计算的路径损耗与呼叫所在信道的载频的发射功率强度，预测MS接收到的下行信号强度；根据所述MS接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。Correspondingly, the initial power control system in the embodiment of the present invention includes: BSC, base station and MS. Wherein, the BSC is used to calculate the path loss between the MS and the base station, and predict the strength of the downlink signal received by the MS according to the calculated path loss and the transmit power intensity of the carrier frequency of the channel where the call is located; The signal strength determines the power strength of the base station for power transmission, and notifies the base station to perform power transmission according to the power strength.

下面分别以小区切换与呼叫接入的情况为例，结合实施例和附图，进一步详细说明。Taking cell handover and call access as examples, the following describes in further detail in combination with embodiments and accompanying drawings.

实施例一：Embodiment one:

本实施例中以小区切换的情况为例，考虑到小区切换前，MS在源小区中处于稳态，因此MS接收到的目标小区的广播控制信道(BCCH)的信号强度信息较准确，所以本实施例中，利用源小区基站控制器BSC所接收的MS接收到的目标小区的BCCH的信号强度，计算MS与目标小区所在基站之间的路径损耗。图1示出了本发明实施例一中初始功率控制方法的示例性流程图，如图1所示，该流程包括如下步骤：In this embodiment, the case of cell handover is taken as an example. Considering that before the cell handover, the MS is in a steady state in the source cell, the signal strength information of the broadcast control channel (BCCH) of the target cell received by the MS is relatively accurate, so this In the embodiment, the path loss between the MS and the base station where the target cell is located is calculated by using the signal strength of the BCCH of the target cell received by the MS received by the base station controller BSC of the source cell. FIG. 1 shows an exemplary flowchart of an initial power control method in Embodiment 1 of the present invention. As shown in FIG. 1 , the process includes the following steps:

101，接收MS上报的MS接收到的目标小区的广播控制信道(BCCH)的信号强度(Rxlev_BCCH)。101. Receive the signal strength (Rxlev_BCCH) of the broadcast control channel (BCCH) of the target cell received by the MS and reported by the MS.

进行切换前，MS会将所接收到的目标小区的BCCH的信号强度通过测量报告上报给BSC，以便BSC根据该测量报告决策是否进行切换，BSC根据该测量报告，对MS所接收的目标小区的BCCH的信号强度进行记录，以便于后续进行路径损耗计算。Before the handover, the MS will report the received signal strength of the BCCH of the target cell to the BSC through a measurement report, so that the BSC can decide whether to perform handover according to the measurement report. The signal strength of the BCCH is recorded for subsequent path loss calculation.

102，根据上述MS接收到的目标小区的BCCH的信号强度及目标小区的BCCH所在载频的发射功率强度，得到MS与目标基站之间的路径损耗。102. Obtain the path loss between the MS and the target base station according to the signal strength of the BCCH of the target cell received by the MS and the transmit power strength of the carrier frequency where the BCCH of the target cell is located.

本步骤中，对于BSC内的小区切换，由于BSC可知欲切换的目标小区的BCCH所在载频的发射功率强度，因此可按照下式计算路径损耗：In this step, for the cell handover in the BSC, since the BSC knows the transmit power intensity of the carrier frequency of the BCCH of the target cell to be handed over, the path loss can be calculated according to the following formula:

路径损耗＝目标小区的BCCH所在载频的发射功率强度-MS接收到的目标小区的BCCH的信号强度Path loss = transmit power strength of the carrier frequency where the BCCH of the target cell is located - signal strength of the BCCH of the target cell received by the MS

此外，若欲切换的目标小区是多频段小区，且目标小区的BCCH所在载频与呼叫所在载频分属不同频段，那么不同频段之间存在频段间路径损耗。因此，在计算路径损耗时，需要考虑BCCH所在载频与呼叫所在载频的频段间路径损耗差(具体计算方法可根据现有技术实现，此处不再赘述)，路径损耗的计算可参考如下公式：In addition, if the target cell to be handed over is a multi-band cell, and the carrier frequency of the BCCH of the target cell and the carrier frequency of the call belong to different frequency bands, then there is an inter-band path loss between the different frequency bands. Therefore, when calculating the path loss, it is necessary to consider the path loss difference between the carrier frequency of the BCCH and the frequency band of the call carrier (the specific calculation method can be implemented according to the existing technology, and will not be described here). The calculation of the path loss can be referred to as follows formula:

路径损耗＝目标小区的BCCH所在载频的发射功率强度-MS接收到的目标小区BCCH的信号强度+频段间路径损耗差Path loss = transmit power strength of the carrier frequency where the BCCH of the target cell is located - signal strength of the BCCH of the target cell received by the MS + path loss difference between frequency bands

103，根据上述路径损耗及呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度。103. Predict the downlink signal strength received by the mobile station according to the path loss and the transmit power strength of the carrier frequency where the call is located.

本步骤中，BSC可根据所分配的呼叫所在信道的载频的发射功率以及路径损耗对MS接收到的下行信号强度进行预测，如下式所示：In this step, the BSC can predict the strength of the downlink signal received by the MS according to the allocated transmit power and path loss of the carrier frequency of the channel where the call is located, as shown in the following formula:

MS接收到的下行信号强度＝呼叫所在载频的发射功率强度-路径损耗Downlink signal strength received by the MS = transmit power strength of the carrier frequency where the call is located - path loss

104，根据上述MS接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。104. According to the strength of the downlink signal received by the MS, determine the power strength of the base station for power transmission, and notify the base station to perform power transmission according to the power strength.

本步骤的实现过程可与现有技术中的实现过程一致，即BSC将预测得到的MS接收到的下行信号强度与理想的MS接收到的下行信号强度相比较，通过功率控制算法，计算出基站应调整至的功率强度，例如可以计算出基站应调整至的功率级别，通知基站按照该功率级别进行功率发射。The implementation process of this step can be consistent with the implementation process in the prior art, that is, the BSC compares the predicted downlink signal strength received by the MS with the ideal downlink signal strength received by the MS, and uses the power control algorithm to calculate the base station The power intensity to which the base station should be adjusted, for example, can be calculated to the power level to which the base station should be adjusted, and the base station is notified to perform power transmission according to the power level.

考虑到进行小区切换时，BSC首先激活申请到的目标小区的业务信道(TCH)，并在接收到目标小区的响应后，通知MS接入到目标小区的TCH，从而完成小区切换。因此本实施例中，可在激活申请到的目标小区的TCH时，利用上述方法进行初始功率控制，让基站按照合适的功率进行发射；也可以在MS成功切换至目标小区时，利用上述方法进行初始功率控制，让基站按照合适的功率进行发射。Considering that when performing cell switching, BSC first activates the traffic channel (TCH) of the applied target cell, and after receiving the response from the target cell, notifies the MS to access the TCH of the target cell, thereby completing the cell switching. Therefore, in this embodiment, when activating the TCH of the applied target cell, the above method can be used to perform initial power control, so that the base station can transmit according to the appropriate power; it can also be used when the MS successfully switches to the target cell. The initial power control allows the base station to transmit according to the appropriate power.

本实施例中，通过在BSC切换时便进行功率控制，使得基站无需按照最大功率进行发射，而只需采用合适的功率进行发射即可，从而降低了系统干扰，提高了业务质量，并且降低了BTS的功耗。此外，由于切换前测量报告是收敛的，信号强度比较稳定，因此功控较准确。In this embodiment, the power control is performed when the BSC is switched, so that the base station does not need to transmit at the maximum power, but only needs to transmit at an appropriate power, thereby reducing system interference, improving service quality, and reducing Power consumption of BTS. In addition, because the measurement report is converged before the handover, the signal strength is relatively stable, so the power control is more accurate.

以上对本实施例一中初始功率控制的方法进行了详细描述，下面再对本实施例一中初始功率控制装置进行详细描述。The method for initial power control in the first embodiment has been described in detail above, and the device for initial power control in the first embodiment will be described in detail below.

图2给出了本发明实施例一中初始功率控制装置的一个结构示意图。如图2所示，该装置可以包括：路损计算模块201、信号强度计算模块202和功率控制模块203。FIG. 2 shows a schematic structural diagram of an initial power control device in Embodiment 1 of the present invention. As shown in FIG. 2 , the device may include: a path loss calculation module 201 , a signal strength calculation module 202 and a power control module 203 .

其中，路损计算模块201用于计算移动台与基站之间的路径损耗。Wherein, the path loss calculation module 201 is used to calculate the path loss between the mobile station and the base station.

信号强度计算模块202用于根据路损计算模块201所计算的路径损耗及呼叫所在载频的发射功率强度，预测MS接收到的下行信号强度。即可通过求取呼叫所在载频的发射功率强度和路径损耗的差值，预测得到MS接收到的下行信号强度。其中，路损计算模块201可将计算的路径损耗发送给信号强度计算模块202；或者，信号强度计算模块202主动从路损计算模块201获取路损计算模块201计算的路径损耗。The signal strength calculation module 202 is used to predict the downlink signal strength received by the MS according to the path loss calculated by the path loss calculation module 201 and the transmit power strength of the carrier frequency where the call is located. That is, the downlink signal strength received by the MS can be predicted by calculating the difference between the transmit power strength of the carrier frequency where the call is located and the path loss. Wherein, the path loss calculation module 201 may send the calculated path loss to the signal strength calculation module 202; or, the signal strength calculation module 202 actively acquires the path loss calculated by the path loss calculation module 201 from the path loss calculation module 201.

功率控制模块203用于根据信号强度计算模块202所预测的MS接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。其中，信号强度计算模块202可将预测的MS接收到的下行信号强度发送给功率控制模块203；或者，功率控制模块203主动从信号强度计算模块202获取信号强度计算模块202所预测的MS接收到的下行信号强度。The power control module 203 is used to determine the power strength of the base station for power transmission according to the downlink signal strength predicted by the signal strength calculation module 202 received by the MS, and notify the base station to perform power transmission according to the power strength. Wherein, the signal strength calculation module 202 can send the predicted downlink signal strength received by the MS to the power control module 203; downlink signal strength.

其中，具体实现时，为了计算移动台与基站之间的路径损耗，本实施例中的装置可如图3所示，在以上装置的基础上可以进一步包括：广播控制信道信号强度接收模块301，用于接收MS上报的MS接收到的目标小区的BCCH的信号强度，将所接收的MS接收到的目标小区BCCH的信号强度提供(可主动提供，也可在路损计算模块201获取时再提供)给路损计算模块201。Wherein, during specific implementation, in order to calculate the path loss between the mobile station and the base station, the device in this embodiment may be shown in Figure 3, and may further include a broadcast control channel signal strength receiving module 301 on the basis of the above device, It is used to receive the signal strength of the BCCH of the target cell received by the MS reported by the MS, and provide the signal strength of the BCCH of the target cell received by the MS (it can be provided actively, or it can be provided again when the path loss calculation module 201 obtains it) ) to the path loss calculation module 201.

相应地，路损计算模块201根据广播控制信道信号强度接收模块301所接收的MS接收到的目标小区的BCCH的信号强度及目标小区的BCCH所在载频的发射功率强度，计算MS与目标基站之间的路径损耗，即路径损耗可以为目标小区的BCCH所在载频的发射功率强度与MS接收到的目标小区的BCCH的信号强度的差值。Correspondingly, the path loss calculation module 201 calculates the distance between the MS and the target base station according to the signal strength of the BCCH of the target cell received by the MS received by the broadcast control channel signal strength receiving module 301 and the transmit power strength of the carrier frequency where the BCCH of the target cell is located. The path loss between , that is, the path loss may be the difference between the transmit power strength of the carrier frequency where the BCCH of the target cell is located and the signal strength of the BCCH of the target cell received by the MS.

此外，若欲切换的目标小区是多频段小区，且目标小区中BCCH所在载频与呼叫所在载频分属不同频段时，则本实施例中的装置还可进一步包括：频段间路损差计算模块302，用于计算BCCH所在载频与呼叫所在载频的频段间路径损耗差。则路损计算模块201可根据来自广播控制信道信号强度接收模块301的MS接收到的目标小区BCCH的信号强度、目标小区的BCCH所在载频的发射功率强度及频段间路损差计算模块302所计算的频段间路径损耗差，计算所述移动台与目标基站之间的路径损耗，即路径损耗＝目标小区的BCCH所在载频的发射功率强度-MS接收到的目标小区BCCH的信号强度+频段间路径损耗差。In addition, if the target cell to be handed over is a multi-band cell, and the carrier frequency of the BCCH and the carrier frequency of the call in the target cell belong to different frequency bands, the device in this embodiment may further include: calculating the path loss difference between frequency bands Module 302, configured to calculate the path loss difference between frequency bands between the carrier frequency of the BCCH and the carrier frequency of the call. Then the path loss calculation module 201 can be based on the signal strength of the BCCH of the target cell received by the MS from the broadcast control channel signal strength receiving module 301, the transmit power strength of the carrier frequency where the BCCH of the target cell is located, and the path loss difference calculation module 302 between frequency bands. Calculate the path loss difference between the frequency bands, calculate the path loss between the mobile station and the target base station, that is, the path loss=the transmit power strength of the carrier frequency where the BCCH of the target cell is located-the signal strength of the BCCH of the target cell received by the MS+frequency band path loss difference.

实施例二：Embodiment two:

本实施例中以MS呼叫接入的情况为例，考虑到上行路径损耗和下行路径损耗相同，因此本实施例中，利用上行路径损耗代替下行路径损耗。图4示出了本发明实施例二中MS初始接入时的功率控制方法的示例性流程图，如图4所示，该流程可以包括如下步骤：In this embodiment, the case of MS call access is taken as an example. Considering that the uplink path loss and the downlink path loss are the same, in this embodiment, the uplink path loss is used instead of the downlink path loss. Fig. 4 shows an exemplary flow chart of the power control method when the MS initially accesses in Embodiment 2 of the present invention. As shown in Fig. 4, the flow may include the following steps:

401，获取MS的实际发射功率。401. Acquire actual transmit power of the MS.

本步骤可根据3GPP TS05.05中的规范，计算出MS的实际发射功率。例如，呼叫接入时，MS会向BSC发送类标更新(Classmark Update)消息，以便通知BSC自身的相关信息，则BSC可根据MS上报的类标更新消息中的功率类别等信息，计算得到MS的实际发射功率。In this step, the actual transmit power of the MS can be calculated according to the specification in 3GPP TS05.05. For example, when a call is received, the MS will send a Classmark Update (Classmark Update) message to the BSC to notify the BSC of its own relevant information, and the BSC can calculate the power class of the MS according to the power category and other information in the Classmark Update message reported by the MS. the actual transmit power.

402，接收基站上报的基站测量到的上行信号强度。402. Receive the uplink signal strength measured by the base station reported by the base station.

通常情况下，基站可对所接收的上行信号进行测量，并将测量结果上报给BSC。呼叫初始接入时，基站可对承载在独立专用控制信道(SDCCH)上的信号进行测量，也可对刚刚完成接入后承载在TCH上的信号进行测量，得到基站接收到的上行信号强度并上报给BSC。BSC可对接收到的基站测量到的上行信号强度进行记录，以便用于后续路径损耗计算。Normally, the base station can measure the received uplink signal and report the measurement result to the BSC. When the call is initially accessed, the base station can measure the signal carried on the independent dedicated control channel (SDCCH), and can also measure the signal carried on the TCH just after the access is completed, so as to obtain the strength of the uplink signal received by the base station and Report to BSC. The BSC can record the received uplink signal strength measured by the base station, so as to be used for subsequent path loss calculation.

本实施例中对401与402中描述的动作的执行顺序不做限定，其发生的先后顺序并不影响本方法的实现。In this embodiment, the execution order of the actions described in 401 and 402 is not limited, and the order in which they occur does not affect the implementation of this method.

403，根据上述基站测量到的上行信号强度及MS的实际发射功率强度，得到MS与基站之间的路径损耗。403. Obtain the path loss between the MS and the base station according to the uplink signal strength measured by the base station and the actual transmit power strength of the MS.

本步骤中，可按照下式计算路径损耗：In this step, the path loss can be calculated according to the following formula:

路径损耗＝MS的实际发射功率强度-基站测量到的上行信号强度Path loss = actual transmit power strength of the MS - uplink signal strength measured by the base station

404，根据上述计算得到的路径损耗及呼叫所在载频的发射功率强度，预测移动台接收到的下行信号强度。404. Predict the downlink signal strength received by the mobile station according to the path loss obtained through the above calculation and the transmit power strength of the carrier frequency where the call is located.

本步骤中，BSC可根据呼叫所在载频的发射功率以及路径损耗对MS接收到的下行信号强度进行预测，如下式所示：In this step, the BSC can predict the strength of the downlink signal received by the MS according to the transmit power of the carrier frequency where the call is located and the path loss, as shown in the following formula:

MS接收到的下行信号强度＝呼叫所在载频的发射功率强度-路径损耗Downlink signal strength received by the MS = transmit power strength of the carrier frequency where the call is located - path loss

405，根据上述预测的MS接收到的下行信号强度，确定基站进行功率发射的功率强度，通知基站按照所述功率强度进行功率发射。405. According to the predicted downlink signal strength received by the MS, determine the power strength of the base station for power transmission, and notify the base station to perform power transmission according to the power strength.

本步骤的实现过程可与现有技术中的实现过程一致，即BSC将预测得到的MS接收到的下行信号强度与理想的MS接收到的下行信号强度相比较，通过功率控制算法，计算出基站应调整至的功率级别，通知基站按照该功率级别进行功率发射。The implementation process of this step can be consistent with the implementation process in the prior art, that is, the BSC compares the predicted downlink signal strength received by the MS with the ideal downlink signal strength received by the MS, and uses the power control algorithm to calculate the base station The power level that should be adjusted to, and notify the base station to perform power transmission according to this power level.

考虑到进行呼叫初始接入时，BSC首先激活申请到的当前小区的TCH，并在接收到当前小区的响应后，通知MS接入到该TCH，从而完成呼叫接入。因此本实施例中，可在激活申请到的TCH时，利用上述方法进行功控，让基站按照合适的功率进行发射；也可以在MS成功接入时，利用上述方法进行功控，让基站按照合适的功率进行发射。Considering that when performing initial call access, the BSC first activates the TCH of the applied current cell, and after receiving the response from the current cell, notifies the MS to access the TCH, thereby completing the call access. Therefore, in this embodiment, when activating the applied TCH, the above method can be used for power control, so that the base station can transmit according to the appropriate power; Appropriate power for transmission.

本实施例中，通过在呼叫接入时便进行功率控制，使得基站无需按照最大功率进行发射，而只需采用合适的功率进行发射即可，从而降低了系统干扰，提高了业务质量，并且降低了BTS的功耗。In this embodiment, by performing power control when a call is accessed, the base station does not need to transmit at the maximum power, but only needs to transmit at an appropriate power, thereby reducing system interference, improving service quality, and reducing power consumption of the BTS.

以上对本实施例二中初始功率控制的方法进行了详细描述，本实施例二中的初始功率控制装置的组成及连接关系与图2所示装置基本一致。不同之处在于，为了计算移动台与基站之间的路径损耗，本实施例二中初始功率控制装置可进一步如图5所示，在图2所示装置的基础上，还可以包括：移动台发射功率获取模块501和上行信号强度接收模块502。The method for initial power control in the second embodiment has been described in detail above. The composition and connection relationship of the initial power control device in the second embodiment are basically the same as those shown in FIG. 2 . The difference is that, in order to calculate the path loss between the mobile station and the base station, the initial power control device in the second embodiment may be further shown in Figure 5, and on the basis of the device shown in Figure 2, it may also include: the mobile station A transmit power acquiring module 501 and an uplink signal strength receiving module 502 .

其中，移动台发射功率获取模块501用于获取MS的实际发射功率，将所获取的MS的实际发射功率提供给路损计算模块201。其中，具体实现过程可与图4所示401中描述的实现过程一致。Wherein, the mobile station transmit power acquisition module 501 is used to acquire the actual transmit power of the MS, and provide the acquired actual transmit power of the MS to the path loss calculation module 201 . Wherein, the specific implementation process may be consistent with the implementation process described in 401 shown in FIG. 4 .

上行信号强度接收模块502用于接收基站上报的基站测量到的上行信号强度，将所接收的基站测量到的上行信号强度提供给路损计算模块201。The uplink signal strength receiving module 502 is configured to receive the uplink signal strength measured by the base station reported by the base station, and provide the received uplink signal strength measured by the base station to the path loss calculation module 201 .

相应地，路损计算模块201用于根据上行信号强度接收模块502所接收的基站测量到的上行信号强度及移动台发射功率获取模块501所获取的MS的实际发射功率强度，计算MS与基站之间的路径损耗。即路径损耗可以为MS的实际发射功率强度与基站测量到的上行信号强度的差值。其中，移动台发射功率获取模块501和上行信号强度接收模块502可分别将各自得到的信息发送给路损计算模块201；或者，路损计算模块201主动从两个模块中分别获取上述信息。Correspondingly, the path loss calculation module 201 is used to calculate the distance between the MS and the base station according to the uplink signal strength measured by the base station received by the uplink signal strength receiving module 502 and the actual transmit power strength of the MS acquired by the mobile station transmit power acquisition module 501 path loss between them. That is, the path loss may be the difference between the actual transmit power strength of the MS and the uplink signal strength measured by the base station. Wherein, the mobile station transmission power obtaining module 501 and the uplink signal strength receiving module 502 can respectively send the obtained information to the path loss calculation module 201; or, the path loss calculation module 201 actively obtains the above information from the two modules respectively.

上述各实施例中的初始功率控制装置可设置在BSC中。The initial power control device in the above embodiments may be set in the BSC.

本发明实施例中的初始功率控制系统，包括：BSC、基站和MS。其中，BSC中可以设置有上述实施例一或实施例二中的装置。The initial power control system in the embodiment of the present invention includes: BSC, base station and MS. Wherein, the BSC may be provided with the device in the first embodiment or the second embodiment above.

上述仅对呼叫初始接入或者刚刚切换到目标小区时的初始功控进行了详细描述，对后续的功控未作限定，在后续的功控中可采用现有的功控算法。以上所述的具体实施例，对本发明的目的、技术方案和有益效果进行了进一步详细说明，所应理解的是，以上所述仅为本发明的较佳实施例而已，并非用于限定本发明的保护范围，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。The above only describes in detail the initial power control when the call is initially accessed or just handed over to the target cell, and does not limit the subsequent power control, and the existing power control algorithm can be used in the subsequent power control. The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims (7)

1. an initial power control method is characterized in that, the method comprises:
When activating the Traffic Channel of Target cell or travelling carriage successful switch during to Target cell, the signal strength signal intensity of the Broadcast Control Channel of the Target cell that the travelling carriage that the base station controller receiving mobile reports receives, and the signal strength signal intensity of the Target cell Broadcast Control Channel that receives according to the travelling carriage that receives is calculated the path loss between described travelling carriage and the base station, Target cell place; And/or, when the activating service channel or travelling carriage when successfully accessing, base station controller obtains the actual emission power of travelling carriage, the uplink signal strength that the base station measurement that the reception base station reports arrives, and the uplink signal strength that arrives according to described base station measurement and the actual emission power intensity of described travelling carriage, calculate the path loss between described travelling carriage and the described base station;
Base station controller is according to the transmission power intensity of described path loss and calling place carrier frequency, the downstream signal intensity that the prediction travelling carriage receives;
The downstream signal intensity that the travelling carriage that base station controller obtains according to prediction receives determines that the base station carries out the power level of power emission, and informing base station carries out power emission according to described power level.
2. the method for claim 1, it is characterized in that, the signal strength signal intensity of the Target cell Broadcast Control Channel that described travelling carriage according to receiving receives, the path loss of calculating between described travelling carriage and the base station, Target cell place comprises: base station controller deducts the transmission power intensity of the Broadcast Control Channel place carrier frequency of Target cell the signal strength signal intensity of the Target cell Broadcast Control Channel that the travelling carriage that receives receives, and obtains the path loss between described travelling carriage and the base station, Target cell place.
3. the method for claim 1, it is characterized in that, Broadcast Control Channel place carrier frequency adheres to different frequency range separately with calling out the place carrier frequency in the described Target cell, and the method further comprises: base station controller calculates path-loss difference between the frequency range of described Broadcast Control Channel place carrier frequency and calling place carrier frequency;
The signal strength signal intensity of the Broadcast Control Channel of the Target cell that described travelling carriage according to receiving receives, the path loss of calculating between described travelling carriage and the target BS comprises: base station controller deducts the transmission power intensity of the Broadcast Control Channel place carrier frequency of Target cell after the signal strength signal intensity of the Target cell Broadcast Control Channel that described travelling carriage receives, add path-loss difference between described frequency range, obtain the path loss between described travelling carriage and the target BS.
4. an initial power control system is characterized in that, this system comprises: base station controller, base station and travelling carriage, wherein,
Described base station controller is used for when activating the Traffic Channel of Target cell or travelling carriage successful switch during to Target cell, the signal strength signal intensity of the Broadcast Control Channel of the Target cell that the travelling carriage that receiving mobile reports receives, and the signal strength signal intensity of the Target cell Broadcast Control Channel that receives according to the travelling carriage that receives is calculated the path loss between described travelling carriage and the base station, Target cell place; And/or, when the activating service channel or travelling carriage when successfully accessing, obtain the actual emission power of travelling carriage, the uplink signal strength that the base station measurement that the reception base station reports arrives, and the uplink signal strength that arrives according to described base station measurement and the actual emission power intensity of described travelling carriage, calculate the path loss between described travelling carriage and the described base station; According to the transmission power intensity of described path loss with the calling place carrier frequency that distributes, the downstream signal intensity that the prediction travelling carriage receives; According to the downstream signal intensity that described travelling carriage receives, determine that the base station carries out the power level of power emission, informing base station carries out power emission according to described power level;
Described base station controller comprises:
The path loss computing module is used for calculating the path loss between travelling carriage and the base station;
Signal strength signal intensity is calculated module, is used for the path loss that calculates according to described path loss computing module and the transmission power intensity of calling out the place carrier frequency, the downstream signal intensity that the prediction travelling carriage receives;
Power control module is used for calculating the downstream signal intensity that travelling carriage that the module prediction obtains receives according to described signal strength signal intensity, determines that the base station carries out the power level of power emission, and informing base station carries out power emission according to described power level;
This base station controller further comprises:
Broadcast Control Channel signal strength signal intensity receiver module is used for when activating the Traffic Channel of Target cell or travelling carriage successful switch during to Target cell, the signal strength signal intensity of the Broadcast Control Channel of the Target cell that the travelling carriage that receiving mobile reports receives;
The transmission power intensity of the signal strength signal intensity of the Broadcast Control Channel of the Target cell that described path loss computing module receives according to described travelling carriage and the Broadcast Control Channel place carrier frequency of Target cell is calculated the path loss between described travelling carriage and the base station, Target cell place;
And/or this base station controller further comprises:
The transmission power of mobile station acquisition module is used for when the activating service channel or travelling carriage when successfully accessing, and obtains the actual emission power of travelling carriage;
The uplink signal strength receiver module is used for when the activating service channel or travelling carriage when successfully accessing, and receives the uplink signal strength that base station measurement that the base station reports arrives;
The base station measurement that described path loss computing module receives according to described uplink signal strength receiver module to uplink signal strength and the actual emission power intensity of the travelling carriage that obtains of described transmission power of mobile station acquisition module, calculate the path loss between described travelling carriage and the described base station.
5. an initial power control device is characterized in that, this device comprises:
The path loss computing module is used for calculating the path loss between travelling carriage and the base station;
Signal strength signal intensity is calculated module, is used for the path loss that calculates according to described path loss computing module and the transmission power intensity of calling out the place carrier frequency, the downstream signal intensity that the prediction travelling carriage receives;
Power control module is used for calculating the downstream signal intensity that travelling carriage that the module prediction obtains receives according to described signal strength signal intensity, determines that the base station carries out the power level of power emission, and informing base station carries out power emission according to described power level;
This device further comprises:
Broadcast Control Channel signal strength signal intensity receiver module is used for when activating the Traffic Channel of Target cell or travelling carriage successful switch during to Target cell, the signal strength signal intensity of the Broadcast Control Channel of the Target cell that the travelling carriage that receiving mobile reports receives;
The transmission power intensity of the signal strength signal intensity of the Broadcast Control Channel of the Target cell that described path loss computing module receives according to described travelling carriage and the Broadcast Control Channel place carrier frequency of Target cell is calculated the path loss between described travelling carriage and the base station, Target cell place;
And/or this device further comprises:
The transmission power of mobile station acquisition module is used for when the activating service channel or travelling carriage when successfully accessing, and obtains the actual emission power of travelling carriage;
The uplink signal strength receiver module is used for when the activating service channel or travelling carriage when successfully accessing, and receives the uplink signal strength that base station measurement that the base station reports arrives;
The base station measurement that described path loss computing module receives according to described uplink signal strength receiver module to uplink signal strength and the actual emission power intensity of the travelling carriage that obtains of described transmission power of mobile station acquisition module, calculate the path loss between described travelling carriage and the described base station.
6. device as claimed in claim 5 is characterized in that, this device further comprises: path loss difference computing module between frequency range, path-loss difference between the frequency range that is used for calculating described Broadcast Control Channel place carrier frequency and calling out the place carrier frequency;
Path-loss difference between the frequency range that the path loss difference computing module calculates between the transmission power intensity of the signal strength signal intensity of the Target cell Broadcast Control Channel that the travelling carriage that described path loss computing module receives according to described Broadcast Control Channel signal strength signal intensity receiver module receives, the Broadcast Control Channel place carrier frequency of Target cell and described frequency range calculates the path loss between described travelling carriage and the base station, Target cell place.
7. such as claim 5 or 6 described devices, it is characterized in that, described device is arranged in base station controller.
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