CN104717736B - A kind of LTE method for controlling downlink power and equipment - Google Patents
A kind of LTE method for controlling downlink power and equipment Download PDFInfo
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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
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
- H04W52/281—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission taking into account user or data type priority
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- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
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- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W52/04—Transmission power control [TPC]
- H04W52/18—TPC being performed according to specific parameters
- H04W52/28—TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non-transmission
- H04W52/283—Power depending on the position of the mobile
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Abstract
本发明公开了一种LTE下行功率控制方法和设备,该方法包括:基站eNB为下行物理下行共享信道PDSCH信道对应的无线元素RE分配发射功率;所述eNB根据用户设备UE的业务优先级,以及UE的位置或者链路信息对所述UE对应的RE的发射功率进行调整。在本发明中,提高了发射功率分配的合理性。
The present invention discloses an LTE downlink power control method and device. The method includes: a base station eNB allocates transmit power to a radio element RE corresponding to a downlink physical downlink shared channel PDSCH channel; the eNB according to the service priority of the user equipment UE, and The position or link information of the UE adjusts the transmit power of the RE corresponding to the UE. In the present invention, the rationality of transmission power allocation is improved.
Description
技术领域technical field
本发明涉及通信技术领域,尤其涉及一种LTE下行功率控制方法和设备。The present invention relates to the field of communication technologies, and in particular, to an LTE downlink power control method and device.
背景技术Background technique
下行功控的主要意义在于:补偿信道的路径损耗和阴影、降低小区内和小区间干扰和降低系统的能量消耗。LTE(Long Term Evolution,长期演进)系统采用了OFDMA(Orthogonal Frequency Division Multiple Access,正交频分多址)技术,因此,在某种程度上,其可有效地消除小区内的干扰;LTE采用RNTP(Relative Narrowband Tx Power,相对窄带发射功率)/HII(High Interference Indication,高干扰指示)/OI(OverloadIndicator,过载指示)指示方案实现小区间干扰的有效消除;而且,LTE更关注于系统容量的提升,即以一定的功率获取系统速率的提升。基于以上三点,LTE采用了半静态的功率分配。The main significance of downlink power control lies in: compensating for the path loss and shadow of the channel, reducing intra-cell and inter-cell interference, and reducing system energy consumption. The LTE (Long Term Evolution, Long Term Evolution) system adopts OFDMA (Orthogonal Frequency Division Multiple Access, Orthogonal Frequency Division Multiple Access) technology, therefore, to a certain extent, it can effectively eliminate the interference in the cell; LTE adopts RNTP (Relative Narrowband Tx Power, relative narrowband transmit power)/HII (High Interference Indication, high interference indication)/OI (Overload Indicator, overload indication) indication scheme achieves effective elimination of inter-cell interference; moreover, LTE pays more attention to the improvement of system capacity , that is, the system rate can be improved with a certain power. Based on the above three points, LTE adopts semi-static power allocation.
LTE PDSCH(Physical Downlink Shared Channel,物理下行共享信道)半静态功率分配方案如下:The LTE PDSCH (Physical Downlink Shared Channel, Physical Downlink Shared Channel) semi-static power allocation scheme is as follows:
eNodeB(基站)决定每个RE(Radio Element,无线元素)的下行发射能量。UE认为下行参考符号的EPRE(EnergyPer RE,每无线元素能量)在整个下行系统带宽和子帧内是不变的,直到收到不同的参考信号的功率信息referenceSignalPower(参考信道功率),取值范围是INTEGER(整数)(-60..50),其是由高层配置的cell-specific(小区专用)的参数。The eNodeB (base station) determines the downlink transmission energy of each RE (Radio Element, radio element). The UE considers that the EPRE (EnergyPer RE, energy per radio element) of the downlink reference symbol is unchanged in the entire downlink system bandwidth and subframe until the power information referenceSignalPower (reference channel power) of different reference signals is received, and the value range is INTEGER (-60..50), which is a cell-specific parameter configured by higher layers.
对每个UE(User Equipment用户设备),认为不包含CRS(Cell Reference Signal,小区参考信号)的PDSCH中的数据子载波的EPRE与CRS的EPRE的比值用ρA表示:For each UE (User Equipment user equipment), it is considered that the ratio of the EPRE of the data subcarrier in the PDSCH without the CRS (Cell Reference Signal, cell reference signal) to the EPRE of the CRS is represented by ρ A :
ρA=δpower-offset+PA+10log10(2)[dB];4发采用分集预编码方案的系统ρ A =δ power-offset +P A +10log 10 (2)[dB]; 4 systems using diversity precoding scheme
ρA=δpower-offset+PA[dB];其它系统ρ A = δ power-offset + P A [dB]; other systems
其中,PA是由高层半静态配置的UE-specific参数,其取值范围是[-6,-4.77,-3,-1.77,0,1,2,3]dB。Among them, PA is a UE-specific parameter semi-statically configured by the high layer, and its value range is [-6, -4.77 ,-3,-1.77,0,1,2,3]dB.
对于每个UE,认为包含CRS的PDSCH中的数据子载波的EPRE与CRS的EPRE的比值用ρB表示,其可根据下表计算得出:For each UE, it is considered that the ratio of the EPRE of the data subcarrier in the PDSCH containing the CRS to the EPRE of the CRS is denoted by ρ B , which can be calculated according to the following table:
表一、小区专用ρB/ρA Table 1. Cell-specific ρ B /ρ A
其中,PB是由高层配置的cell-specific的参数。Among them, PB is a cell-specific parameter configured by higher layers.
如上所示,LTE下行PDSCH的半静态功率分配方案,其是根据referenceSignalPower、ρA和ρB,即可获得各PDSCH各RE的EPRE。As shown above, in the semi-static power allocation scheme of the LTE downlink PDSCH, the EPRE of each RE of each PDSCH can be obtained according to referenceSignalPower, ρ A and ρ B .
由ρA的表达式可知,针对各个UE,只有9dB的功率调整空间。而且,目前的方案以提高小区吞吐率为目的,忽略了UE之间以及业务间的差异性,在功率分配时,并未综合地考虑UE类型、位置、业务特性等因素。It can be known from the expression of ρ A that for each UE, there is only 9 dB of power adjustment space. Moreover, the current solution aims to improve the cell throughput rate, ignores the differences between UEs and services, and does not comprehensively consider factors such as UE type, location, and service characteristics during power allocation.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种LTE下行功率控制方法和设备,用以提高发射功率分配的合理性。The present invention provides an LTE downlink power control method and device to improve the rationality of transmission power allocation.
为了达到以上目的,本发明提供了一种长期演进LTE下行功率控制方法,包括:In order to achieve the above purpose, the present invention provides a long-term evolution LTE downlink power control method, including:
基站eNB为下行物理下行共享信道PDSCH信道对应的无线元素RE分配发射功率;The base station eNB allocates transmit power to the radio element RE corresponding to the downlink physical downlink shared channel PDSCH channel;
所述eNB根据用户设备UE的业务优先级,以及UE的位置或者链路信息对所述UE对应的RE的发射功率进行调整。The eNB adjusts the transmit power of the RE corresponding to the UE according to the service priority of the user equipment UE and the position or link information of the UE.
本发明实施例还提供了一种基站eNB,包括:An embodiment of the present invention also provides a base station eNB, including:
功率分配模块,用于为下行物理下行共享信道PDSCH信道对应的无线元素RE分配发射功率;a power allocation module, configured to allocate transmit power to the radio element RE corresponding to the downlink physical downlink shared channel PDSCH channel;
功率调整模块,用于根据用户设备UE的业务优先级,以及UE的位置或者链路信息对所述UE对应的RE的发射功率进行调整。The power adjustment module is configured to adjust the transmit power of the RE corresponding to the UE according to the service priority of the user equipment UE and the position or link information of the UE.
本发明上述实施例中,NB为下行PDSCH信道对应的RE分配发射功率后,根据UE的业务优先级,以及位置或者链路信息对UE对应的RE的发射功率进行调整,在确定UE对应的RE的发射功率时,综合考虑了UE的业务特性,地理位置等,提高了发射功率分配的合理性。In the above embodiment of the present invention, after the NB allocates the transmit power to the REs corresponding to the downlink PDSCH channel, the NB adjusts the transmit power of the REs corresponding to the UE according to the service priority of the UE and the location or link information, and then determines the REs corresponding to the UE. When the transmit power is selected, the service characteristics and geographical location of the UE are comprehensively considered, which improves the rationality of transmit power allocation.
附图说明Description of drawings
图1为本发明实施例提供的一种LTE下行功率控制方法的流程示意图;FIG. 1 is a schematic flowchart of an LTE downlink power control method according to an embodiment of the present invention;
图2为本发明实施例提供的一种功率偏移值与UE的业务优先级、以及PL的对应关系示意图;2 is a schematic diagram of a correspondence between a power offset value, a service priority of a UE, and a PL according to an embodiment of the present invention;
图3为本发明实施例提供的一种eNB的结构示意图。FIG. 3 is a schematic structural diagram of an eNB according to an embodiment of the present invention.
具体实施方式Detailed ways
针对上述现有技术中存在的问题,本发明实施例提供了一种LTE下行功率控制的技术方案。在该技术方案中,eNB为下行PDSCH信道对应的RE分配发射功率后,根据UE的业务优先级,以及位置或者链路信息对UE对应的RE的发射功率进行调整,在确定UE对应的RE的发射功率时,综合考虑了UE的业务特性,地理位置等,提高了发射功率分配的合理性。In view of the problems existing in the above-mentioned prior art, an embodiment of the present invention provides a technical solution for LTE downlink power control. In this technical solution, after allocating the transmit power to the REs corresponding to the downlink PDSCH channel, the eNB adjusts the transmit power of the REs corresponding to the UE according to the service priority of the UE and the location or link information. When transmitting power, the service characteristics and geographical location of the UE are comprehensively considered, which improves the rationality of transmitting power allocation.
其中,eNB为下行PDSCH信道对应的RE分配发射功率可以依照现有的功率分配模型进行。Wherein, the eNB may allocate the transmit power to the REs corresponding to the downlink PDSCH channel according to the existing power allocation model.
下面将结合本申请中的附图,对本申请中的技术方案进行清楚、完整的描述,显然,所描述的实施例是本申请的一部分实施例,而不是全部的实施例。基于本申请中的实施例,本领域普通技术人员在没有做出创造性劳动的前提下所获得的所有其他实施例,都属于本申请保护的范围。The technical solutions in the present application will be described clearly and completely below with reference to the accompanying drawings in the present application. Obviously, the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present application.
如图1所示,为本发明实施例提供的一种LTE下行功率控制方法的流程示意图,可以包括以下步骤:As shown in FIG. 1, it is a schematic flowchart of an LTE downlink power control method provided by an embodiment of the present invention, which may include the following steps:
步骤101、eNB为下行PDSCH信道对应的RE分配发射功率。Step 101: The eNB allocates transmit power to REs corresponding to the downlink PDSCH channel.
具体的,在本发明实施例中,eNB可以依照现有的功率分配模型对下行PDSCH信道对应的RE进行功率分配,其具体实现在此不再赘述。Specifically, in the embodiment of the present invention, the eNB may perform power allocation to the REs corresponding to the downlink PDSCH channel according to the existing power allocation model, and the specific implementation thereof will not be repeated here.
步骤102、eNB根据UE的业务优先级,以及UE的位置或者链路信息对该UE对应的RE的发射功率进行调整。Step 102: The eNB adjusts the transmit power of the RE corresponding to the UE according to the service priority of the UE and the location or link information of the UE.
具体的,考虑到不同业务对发射功率的要求可能会不相同,以及UE地理位置或链路等信息对发射功率的影响,在本发明实施例中,为了使发射功率的分配更加合理,eNB将下行PDSCH信道对应的RE分配给UE后,需要根据该UE的业务优先级,以及位置或者链路信息对该UE对应的RE(即所分配的RE)的发射功率进行调整。Specifically, considering that different services may have different requirements for transmit power, and the influence of information such as the geographic location or link of the UE on the transmit power, in this embodiment of the present invention, in order to make the allocation of transmit power more reasonable, the eNB will After the RE corresponding to the downlink PDSCH channel is allocated to the UE, the transmit power of the RE corresponding to the UE (ie, the allocated RE) needs to be adjusted according to the service priority of the UE and the location or link information.
例如,对于eNB服务小区中的业务优先级相同的UE,可以在保证业务速率的情况下,降低中心处UE对应的RE的发射功率,并适当提高边缘处UE对应的RE的发射功率。For example, for UEs with the same service priority in the eNB serving cell, the transmit power of the REs corresponding to the UE at the center can be reduced and the transmit power of the REs corresponding to the UE at the edge can be appropriately increased while ensuring the service rate.
其中,eNB根据UE的业务优先级,以及UE的PL对UE对应的RE的发射功率进行调整时,可以先根据UE的业务优先级,以及UE的位置或者链路信息确定该UE对应的RE发射功率的功率偏移值,然后根据该功率偏移值对该UE对应的RE的发射功率进行偏移。Wherein, when the eNB adjusts the transmission power of the RE corresponding to the UE according to the service priority of the UE and the PL of the UE, it may first determine the transmission power of the RE corresponding to the UE according to the service priority of the UE and the position or link information of the UE. the power offset value of the power, and then offset the transmit power of the RE corresponding to the UE according to the power offset value.
优选地,在本发明实施例中,eNB根据功率偏移值对UE对应的RE的发射功率进行偏移,可以具体通过以下公式实现:Preferably, in the embodiment of the present invention, the eNB offsets the transmit power of the RE corresponding to the UE according to the power offset value, which can be specifically implemented by the following formula:
P*=P+△P;P*=P+△P;
其中,P*为UE对应的RE偏移后的发射功率,P为UE对应的RE偏移前的发射功率,△P为功率偏移值。Among them, P* is the transmit power of the REs corresponding to the UE after the offset, P is the transmit power of the REs corresponding to the UE before the offset, and ΔP is the power offset value.
在本发明实施例中,可以预先设定功率偏移值与UE的业务优先级、以及位置或者链路信息的对应关系,当需要发射功率调整时,可以根据UE的业务优先级,以及PL查询该对应关系,确定该UE对应的RE的发射功率的功率偏移值;In the embodiment of the present invention, the corresponding relationship between the power offset value and the service priority of the UE, and the location or link information can be preset. When the transmission power needs to be adjusted, it can be queried according to the service priority of the UE and the PL. The correspondence is to determine the power offset value of the transmit power of the RE corresponding to the UE;
优选地,在本发明实施例中,UE的位置或者链路信息可以为UE的PL(PathLoss,路损),其中:Preferably, in this embodiment of the present invention, the location or link information of the UE may be a PL (PathLoss, path loss) of the UE, where:
当业务优先级相同时,UE的PL越大,该UE对应RE的发射功率的功率偏移值越大;When the service priorities are the same, the larger the PL of the UE, the larger the power offset value of the transmit power of the UE corresponding to the RE;
当PL相同时,UE的业务优先级越高,UE对应的RE的发射功率的功率偏移值越大。When the PL is the same, the higher the service priority of the UE is, the larger the power offset value of the transmit power of the RE corresponding to the UE is.
需要注意的是,在本发明实施例中,当UE承载有多个业务时,eNB可以根据该多个业务中业务优先级最高的业务的业务优先级,以及UE的位置或者链路信息,对该UE对应的RE的发射功率进行调整。It should be noted that, in this embodiment of the present invention, when the UE bears multiple services, the eNB may, according to the service priority of the service with the highest service priority among the multiple services, and the location or link information of the UE, determine the The transmit power of the RE corresponding to the UE is adjusted.
为了更好地理解本发明实施例提供的技术方案,下面结合具体的应用场景对本发明实施例提供的技术方案进行更加详细地描述。In order to better understand the technical solutions provided by the embodiments of the present invention, the technical solutions provided by the embodiments of the present invention are described in more detail below with reference to specific application scenarios.
在该实施例中,业务优先级通过QCI(QoS(Quality of Service,服务质量)ClassIdentifier,QoS类别标识)表征;UE的位置或者链路信息通过PL来表征,功率偏移值(Offset)的取值范围为(-5,+5),PL取值范围为(0,30);功率偏移值与UE的业务优先级、以及PL的对应关系可以参见图2。In this embodiment, the service priority is characterized by QCI (Quality of Service (QoS) ClassIdentifier, QoS class identifier); the location or link information of the UE is characterized by PL, and the power offset value (Offset) The value range is (-5, +5), and the PL value range is (0, 30); the corresponding relationship between the power offset value, the service priority of the UE, and the PL can be seen in Figure 2.
如图2所示,其纵坐标为Offset,变化范围为-5~+5;横坐标为PL,变化范围为0~30;以QCI=1的业务为例:As shown in Figure 2, the ordinate is Offset, and the range of change is -5 to +5; the abscissa is PL, and the range of change is 0 to 30. Take the service with QCI=1 as an example:
其Offset设置的函数为:The function of its Offset setting is:
Offset=2/12*PL+3;(0<PL<12)Offset=2/12*PL+3; (0<PL<12)
Offset=5(12<PL<30)Offset=5 (12<PL<30)
同理,其他QCI也是一个分段函数。Similarly, other QCIs are also a piecewise function.
根据图2所示的对应关系,eNB依照现有功率分配模型对下行PDSCH信道对应的RE进行功率分配后,当需要对功率分配进行调整时,可以根据UE的业务优先级(在该实施例中用QCI表征),以及UE的PL查询确定对应的功率偏移值(Offset),进而根据该功率偏移值,对该UE对应的RE的发生功率进行偏移。According to the correspondence shown in FIG. 2, after the eNB allocates power to the REs corresponding to the downlink PDSCH channel according to the existing power allocation model, when the power allocation needs to be adjusted, it can be adjusted according to the service priority of the UE (in this embodiment) It is characterized by QCI), and the PL query of the UE determines the corresponding power offset value (Offset), and then according to the power offset value, the occurrence power of the RE corresponding to the UE is offset.
例如,假设UE的QCI=1,PL=6,则根据图2所示的对应关系,可以确定该UE对应的功率偏移值为Offset=2/12*PL+3=4,则UE对应的RE偏移后的发射功率P*=P+4(提高了该UE对应的RE的发射功率)。For example, assuming that QCI=1 and PL=6 of the UE, according to the corresponding relationship shown in FIG. 2, it can be determined that the power offset value corresponding to the UE is Offset=2/12*PL+3=4, then the corresponding power offset value of the UE can be determined as Offset=2/12*PL+3=4. The transmit power after the RE offset is P*=P+4 (the transmit power of the RE corresponding to the UE is increased).
在该实施例中,高等级的QCI(QCI的值越小,QCI的等级越高)对应的功率偏移值较大,低等级QCI对应的功率偏移值较小;同时,当PL越大时,对应的功率偏移值越大,反之,PL越小时,对应的功率偏移值越小,甚至为负数,即降低发射功率。In this embodiment, the power offset value corresponding to the high-level QCI (the smaller the QCI value, the higher the QCI level) is larger, and the power offset value corresponding to the low-level QCI is smaller; at the same time, when the PL is larger When , the corresponding power offset value is larger, on the contrary, the smaller the PL is, the smaller the corresponding power offset value is, or even a negative number, that is, the transmit power is reduced.
需要注意的是,该实施例中提供的QCI、PL以及Offset的对应关系仅仅是本发明实施例提供的技术方案的一种具体实现,并不是对本发明保护范围的限定,即当QCI相同时,Offset随PL的变化关系也并不限于图2中所示的直线所示,也可以采用曲线方式,只要体现出Offset与QCI及PL正相关即可。It should be noted that the correspondence between QCI, PL and Offset provided in this embodiment is only a specific implementation of the technical solution provided by the embodiment of the present invention, and does not limit the protection scope of the present invention, that is, when the QCI is the same, The relationship between Offset and PL is not limited to that shown by the straight line shown in FIG. 2 , and a curve method can also be used, as long as Offset is positively correlated with QCI and PL.
通过以上描述可以看出,在本发明实施例中,eNB为下行PDSCH信道对应的RE分配发射功率后,根据UE的业务优先级,以及位置或者链路信息对UE对应的RE的发射功率进行调整,在确定UE对应的RE的发射功率时,综合考虑了UE的业务特性,地理位置等,提高了发射功率分配的合理性。It can be seen from the above description that in this embodiment of the present invention, after the eNB allocates the transmit power to the REs corresponding to the downlink PDSCH channel, the eNB adjusts the transmit power of the REs corresponding to the UE according to the service priority of the UE and the location or link information. , when determining the transmit power of the RE corresponding to the UE, the service characteristics and geographical location of the UE are comprehensively considered, which improves the rationality of the transmit power allocation.
基于相同的技术构思,本发明实施例还提供了一种eNB,可以应用于上述方法实施例。Based on the same technical idea, an embodiment of the present invention further provides an eNB, which can be applied to the above method embodiments.
如图3所示,为本发明实施例提供的一种eNB的结构示意图,可以包括:As shown in FIG. 3, it is a schematic structural diagram of an eNB provided by an embodiment of the present invention, which may include:
功率分配模块31,用于为下行物理下行共享信道PDSCH信道对应的无线元素RE分配发射功率;The power allocation module 31 is used for allocating transmit power to the radio element RE corresponding to the downlink physical downlink shared channel PDSCH channel;
功率调整模块32,用于根据用户设备UE的业务优先级,以及UE的位置或者链路信息对所述UE对应的RE的发射功率进行调整。The power adjustment module 32 is configured to adjust the transmit power of the RE corresponding to the UE according to the service priority of the user equipment UE and the position or link information of the UE.
其中,所述功率调整模块32具体用于,根据UE的业务优先级,以及UE的位置或者链路信息确定所述UE对应的RE的发射功率的功率偏移值;根据功率偏移值对所述UE对应的RE的发射功率进行偏移。The power adjustment module 32 is specifically configured to determine the power offset value of the transmit power of the RE corresponding to the UE according to the service priority of the UE and the position or link information of the UE; The transmit power of the RE corresponding to the UE is offset.
其中,所述功率调整模块32具体用于,通过以下公式实现根据所述功率偏移值对所述UE对应的RE的发射功率进行偏移:The power adjustment module 32 is specifically configured to offset the transmit power of the RE corresponding to the UE according to the power offset value by using the following formula:
P*=P+△P;P*=P+△P;
其中,P*为所述UE对应的RE偏移后的发射功率,P为所述UE对应的RE偏移前的发射功率,△P为功率偏移值。Wherein, P* is the transmit power of the REs corresponding to the UE after offset, P is the transmit power of the REs corresponding to the UE before the offset, and ΔP is the power offset value.
其中,所述UE的位置或者链路信息为所述UE的路损PL;其中,Wherein, the position or link information of the UE is the path loss PL of the UE; wherein,
当业务优先级相同时,UE的PL越大,所述UE对应的RE的发射功率的功率偏移值越大;When the service priorities are the same, the larger the PL of the UE, the larger the power offset value of the transmit power of the RE corresponding to the UE;
当PL相同时,UE的业务优先级越高,所述UE对应的RE的发射功率的功率偏移值越大。When the PL is the same, the higher the service priority of the UE is, the larger the power offset value of the transmit power of the RE corresponding to the UE is.
其中,所述功率调整模块32具体用于,当UE承载有多个业务时,根据所述多个业务中业务优先级最高的业务的业务优先级,以及所述UE的位置或者链路信息,对所述UE对应的RE的发射功率进行调整。Wherein, the power adjustment module 32 is specifically configured to, when the UE bears multiple services, according to the service priority of the service with the highest service priority among the multiple services, and the location or link information of the UE, The transmit power of the RE corresponding to the UE is adjusted.
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到本发明可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台终端设备(可以是手机,个人计算机,服务器,或者网络设备等)执行本发明各个实施例所述的方法。From the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary general hardware platform, and of course can also be implemented by hardware, but in many cases the former is a better implementation Way. Based on such understanding, the technical solutions of the present invention essentially or the parts that contribute to the prior art can be embodied in the form of a software product, and the computer software product is stored in a storage medium and includes several instructions for making a A terminal device (which may be a mobile phone, a personal computer, a server, or a network device, etc.) executes the methods described in the various embodiments of the present invention.
以上所述仅是本发明的优选实施方式,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本发明的保护范围。The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.
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