WO2014026337A1

WO2014026337A1 - Power control method, base station and user equipment

Info

Publication number: WO2014026337A1
Application number: PCT/CN2012/080171
Authority: WO
Inventors: 刘建琴
Original assignee: 华为技术有限公司
Priority date: 2012-08-15
Filing date: 2012-08-15
Publication date: 2014-02-20
Also published as: CN104170269B; CN104170269A

Abstract

The present invention is applicable in the technical field of mobile communications, and provided are a power control method, a base station and a user equipment. The method comprises: when using a modulation and coding scheme of 256 quadrature amplitude modulation (QAM), a base station generating a power rollback value m, m being a real number which is not equal to 0; and the base station conducting power rollback on the power of a transmitting signal transmitted to a user equipment based on m. When the base station uses a modulation and coding scheme of 256 QAM, the present invention conducts rollback on the transmitting power of the base station by a power rollback value m, wherein m is a real number which is not equal to 0, and ensures that a PA can operate in a linear region.

Description

说明书 Description

一种功率控制方法、基站及用户设备 Power control method, base station and user equipment

技术领域 Technical field

本发明属于移动通信技术领域，尤其涉及一种功率控制方法、基站及用户设备。背景技术 The present invention belongs to the field of mobile communication technologies, and in particular, to a power control method, a base station, and a user equipment. Background technique

随着移动通信技术的发展， 3G网络的大规模部署，高速率大带宽的业务正带给人们丰富多彩的应用体验，人们对自由、高速率、高品质通信的追求也将永无止境。据预测，未来 5年移动数据业务流量需求将增加 40倍，年均增加 8-10倍。传统蜂窝移动通信是以大覆盖、高移动性为主要设计目标，并且在室外环境，无线链路性能已经逼近香农极限。统计数据表明， 80%以上的数据业务发生在室内，室内特有的低速，短距离，富散射信道环境，为进一步提高无线链路性能开辟了新的空间。 With the development of mobile communication technology, the large-scale deployment of 3G networks, high-speed and large-bandwidth services are bringing people a colorful application experience, and the pursuit of free, high-speed, high-quality communication will never end. It is predicted that the demand for mobile data traffic will increase 40 times in the next five years, with an average annual increase of 8-10 times. Traditional cellular mobile communication is mainly designed with large coverage and high mobility, and in the outdoor environment, the performance of wireless links has approached the Shannon limit. Statistics show that more than 80% of data traffic occurs indoors, and indoor low-speed, short-range, and rich scatter channel environments open up new space for further improving the performance of wireless links.

室内和热点环境下用户对数据速率的要求很高，而且总流量需求较大。为达到这些需求，可采用的技术包括： Users have high data rate requirements in indoor and hotspot environments, and the total traffic demand is large. To meet these needs, the technologies available include:

1、使用更高阶的调制方式，如 256正交振幅调制（Quadrature Amplitude Modulation, QAM ), 使用 256QAM可以提升频谱效率。 1. Use higher order modulation methods, such as 256 Quadrature Amplitude Modulation (QAM), which can improve spectral efficiency by using 256QAM.

然而，高阶调制的误差向量幅度 ( Error Vector Magnitude, EVM )要求对硬件实现是一个挑战，器件能力和成本决定了 256QAM应用的可行性。 However, Error Vector Magnitude (EVM) requirements for high-order modulation are a challenge for hardware implementation, and device capabilities and cost determine the feasibility of 256QAM applications.

2、时分双工 (Time Division Duplexing, TDD)业务自适应子帧配比，可以增加可用资源。 2. The Time Division Duplexing (TDD) service adaptive subframe ratio can increase the available resources.

目前，长期演进 (Long Term Evolution, LTE)已经定义了 7种 TDD上下行子帧配比，这些配比分别与不同的上下行业务比例匹配。 Currently, Long Term Evolution (LTE) has defined seven TDD uplink and downlink sub-frame ratios, which match the ratio of different uplink and downlink services.

传统的 TDD***为了避免上下行相互干扰，相邻宏基站必须使用相同的配比，保证上下行同步。而在远端无线节点 (Remote Radio Head, RRH)的低发射功率条件下，可以实现小区级的上下行子帧配比，并可以根据实际网络中的业务流量需求进行改变。业务自适应的 TDD子帧配比在可以有效地提升***容量，并更好地提供高速率用户体验。 In order to avoid interference between uplink and downlink, the traditional TDD system must use the same configuration for adjacent macro base stations. Than, to ensure synchronization between the uplink and the downlink. In the case of the low-radiation power of the remote radio node (RRH), the uplink-downlink subframe ratio at the cell level can be implemented, and can be changed according to the service traffic demand in the actual network. Service-adaptive TDD subframe matching can effectively increase system capacity and better provide a high-rate user experience.

同时， TDD业务自适应配比的引入会导致干扰环境和干扰源更加多元化，用户设备和 RRH的发射功率相当（均为 23dBm)的场景下，上行链路对下行链路的干扰可能会尤其严重，因为在单载波频分多址（ Single-carrier Frequency-Division Multiple Access , SC— FDMA )下，用户设备的上行信号通常在窄带上进行发射，从而单位资源块上的发射功率较高；而在正交频分多址 ( Orthogonal Frequency Division Multiple Access, OFDMA )下 , RRH的下行信号在整个***带宽上进行发射，从而单位资源块上的发射功率较低. At the same time, the introduction of adaptive matching of TDD services will lead to more diversified interference environments and interference sources. In the scenario where the transmission power of user equipment and RRH is equivalent (both 23dBm), the interference from the uplink to the downlink may be especially Severe, because in single-carrier frequency-division multiple access (SC-FDMA), the uplink signal of the user equipment is usually transmitted on a narrowband, so that the transmission power on the unit resource block is higher; Under Orthogonal Frequency Division Multiple Access (OFDMA), the downlink signal of RRH is transmitted over the entire system bandwidth, so that the transmission power per unit resource block is low.

TDD 业务自适应子帧配比场景下，上行信号和下行信号在单位资源块上的功率谱密度的非对称性将导致下行信号受到上行信号的较大干扰，尤其是上行多用户配对场景下，如果不对调度资源块上所有配对用户的总发射功率进行限制，将会导致下行信号受到上行信号的较强干扰，从而不能被正确接收，如图 1所示处于 API边界处的 UE3和 AP2边界处的 UE 4的下行信号将受到 AP3 的 UE1和 UE2的上行信号的较大干扰。 In the TDD service adaptive subframe matching scenario, the asymmetry of the power spectral density of the uplink signal and the downlink signal on the unit resource block will cause the downlink signal to be greatly interfered by the uplink signal, especially in the uplink multi-user pairing scenario. If the total transmit power of all paired users on the scheduling resource block is not limited, the downlink signal will be strongly interfered by the uplink signal and cannot be correctly received, as shown in Figure 1 at the boundary of UE3 and AP2 at the API boundary. The downlink signal of UE 4 will be greatly interfered by the uplink signals of UE1 and UE2 of AP3.

针对 256QAM方式，为了解决高阶调制的 EVM对硬件的要求，现有技术采用的方法是： For the 256QAM mode, in order to solve the hardware requirements of the high-order modulation EVM, the prior art adopts the following methods:

RRH在 256QAM调制编码方式时，采用与 16QAM/64QAM时相同的功率回退机制，即对所用用户的发射功率进行回退，该功率回退值 _ffset满足：When the RRH is in the 256QAM modulation and coding mode, the power backoff mechanism is the same as that of the 16QAM/64QAM, that is, the transmit power of the user used is rolled back. The power backoff value _ffset satisfies:

PA A[^dB] ^0Γ Ρ_Β = ^ _POWER__OFFSET + P_B [dB] PA A[ ^dB ] ^0Γ Ρ _Β = ^ _POWER _ _OFFSET + P _B [dB]

其中， A , A分别是假定不包含公共导频的符号上业务数据信道的每资源单元功率 ( Energy Per Resource Element, EPRE )与包含公共导频的符号上业务数据信道的每资源单元功率的比值。其中，。_WCT—。_ffset 在除多用户多输入多输出（ multi-user multiple-input-multiple-output , MU-MIMO )模式外的所有传输模式下均默认为Where A and A are the ratios of the resource per resource unit of the traffic data channel (EPRE) of the traffic data channel on the symbol that does not include the common pilot, respectively, and the traffic data channel on the symbol containing the common pilot. . among them, . _WCT —. _Ffset defaults to all transmission modes except multi-user multiple-input-multiple-output (MU-MIMO) mode.

0 0

这种方法会带来较高的峰均功率比 (peak-to-average power ratio , PAPR), 使得功率放大器（Power Amplifier, PA ) 不能正常工作在线性区。 This method results in a higher peak-to-average power ratio (PAPR), so that the Power Amplifier (PA) does not work properly in the linear region.

针对 TDD业务自适应子帧配比和上行多用户配对场景下，用户设备的发射功率依然按照标准 TS36.213进行设定： For the TDD service adaptive subframe ratio and uplink multi-user pairing scenario, the transmit power of the user equipment is still set according to the standard TS36.213:

π · I尸 CMAX,_C W π · I corpse CMAX, _C W

[10 log₁₀ (M_{PUSCH c} (0) + P₀_PUSCH,C (i) + a_c (j) · PL + (i) + f_c [10 log ₁₀ (M _{PUSCH c} (0) + P ₀ _PUSCH, C (i) + a _c (j) · PL + (i) + f _c

其中， ( 为用户设备在主服务小区载波 c上的总发射功率； Where: (the total transmit power of the user equipment on the primary serving cell carrier c;

M_PUSCH, '）为物理上行共享信道（physical Uplink Shared Channel , PUSCH )调度资源块数目，单位为物理资源块 (Physical Resource Block, PRB); M _PUSCH , ') is a physical uplink shared channel (PUSCH) scheduling resource block number, the unit is a physical resource block (Physical Resource Block, PRB);

尸 O— PUSCH'c(J)包括尸 O— NOM L— PUSCH'c(J)和尸 O— UE— PUSCH 'c(J)两项为用户设备的目标接收功率，由高层 RRC信令半静态配置； The corpse O-PUSCH'c(J) includes the corpse O-NOM L-PUSCH'c(J) and the corpse O-UE-PUSCH 'c(J) for the target receiving power of the user equipment, which is composed of the upper layer RRC signaling half. Static configuration

" '）是路损补偿因子，由高层 RRC信令半静态配置； " ') is the path loss compensation factor, which is semi-statically configured by higher layer RRC signaling;

P 是用户设备基于 RSRP的路损测量值； P is the RSRP-based path loss measurement value of the user equipment;

A_r^_c ( ) = 101og₁₀ (( 2^ -AC 是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置； A _r ^ _c ( ) = 101og ₁₀ (( 2^ -AC is the power adjustment value for different modulation and coding modes, semi-static configuration by higher layer RRC signaling;

《是闭环功率调整量，是接收端根据接收 /测量误差量化出来的反馈值。 "It is the closed-loop power adjustment amount, which is the feedback value quantified by the receiving end based on the reception/measurement error.

用户设备的下行接收信号尤其是小区边界处，用户设备的下行信号遭受到邻区不同向的上行信号（尤其是多用户配对时上行信号）的较大干扰，且此干扰动态可变。 The downlink received signal of the user equipment is especially at the cell boundary, and the downlink signal of the user equipment suffers from the interference of different uplink signals in the neighboring area (especially the uplink signal when multi-user pairing), and the interference is dynamically variable.

而上述用户设备的发射功率的设定公式中包括的参数如 ^ ( 、 ^P0_PUSCH,c (i) 等为 RRC高层信令半静态配置的，无法实现对用户设备发射功率的动态快速调整。而唯一可以通过物理下行控制信道 ( Physical Downlink Control Channel,The parameters included in the setting formula of the transmit power of the user equipment, such as ^ ( , ^P 0_PUSCH, c (i), etc., are semi-statically configured for RRC high-level signaling, and cannot dynamically adjust the transmit power of the user equipment. Whole. The only physical downlink control channel (Physical Downlink Control Channel,

PDCCH )动态配置和调整的功控命令字 ^W的调整步长有限，单次调整范围包括 { -4,-1,0,1,3,4 },从而不能实现对单位资源块上的所有配对用户迅速调整总发射功率的目的。 PDCCH) The dynamic adjustment and adjustment of the power control command word ^{W has} a limited adjustment step. The single adjustment range includes { -4, -1, 0, 1, 3, 4 }, so that all pairs on the unit resource block cannot be achieved. The user quickly adjusts the total transmit power for the purpose.

综上所述，现有技术提供的功率控制方法虽然可以有效提升频谱效率和支持高速数据传输，但同时会带来较高的峰均功率比，使得功率放大器不能正常工作在线性区，另外，在 TDD业务自适应子帧配比和上行多用户配对场景下，尤其是小区边界处，用户设备的下行信号遭受到邻区不同向的上行信号的较大干扰，大大降低了下行信号的接收质量。技术问题 In summary, the power control method provided by the prior art can effectively improve the spectrum efficiency and support high-speed data transmission, but at the same time, it will bring a high peak-to-average power ratio, so that the power amplifier cannot work normally in the linear region. In the TDD service adaptive subframe ratio and uplink multi-user pairing scenario, especially at the cell boundary, the downlink signal of the user equipment suffers from the interference of the uplink signals of different directions in the neighboring area, which greatly reduces the receiving quality of the downlink signal. . technical problem

本发明实施例提供了一种功率控制方法、基站及用户设备，旨在解决现有技术提供的功率控制方法会带来较高的峰均功率比，使得功率放大器不能正常工作在线性区的问题。技术解决方案 The embodiments of the present invention provide a power control method, a base station, and a user equipment, which are intended to solve the problem that the power control method provided by the prior art brings a high peak-to-average power ratio, so that the power amplifier cannot work normally in the linear region. . Technical solution

一方面，提供一种功率控制方法，所述方法包括： In one aspect, a power control method is provided, the method comprising:

当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为，所述 m为不等于 0的实数； When the base station adopts the modulation coding mode of the 256 quadrature amplitude modulation QAM, a power backoff value is generated, and the m is a real number not equal to 0;

由所述基站基于所述 m对发射至用户的发射信号的功率进行功率回退。另一方面，提供一种基站，所述基站包括： Power backing by the base station based on the m to the power of the transmitted signal transmitted to the user. In another aspect, a base station is provided, where the base station includes:

功率回退值生成单元，用于当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数； a power backoff value generating unit, configured to generate a power backoff value m when the base station adopts a modulation coding mode of 256 quadrature amplitude modulation QAM, where the m is a real number not equal to 0;

功率控制单元，用于基于所述 m对发射至用户的发射信号的功率进行功率回退。 And a power control unit, configured to perform power backoff on the power of the transmit signal transmitted to the user based on the m.

再一方面，提供一种功率控制方法，所述方法包括：配对用户设备接收基站下发的配对用户数 N; In still another aspect, a power control method is provided, the method comprising: The paired user equipment receives the number N of paired users delivered by the base station;

根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 The transmit power of the paired user equipment is determined according to the number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c.

另一方面，提供一种用户设备，所述用户设备包括： In another aspect, a user equipment is provided, where the user equipment includes:

配对用户数接收单元，用于接收基站下发的配对用户数 N; a pairing user number receiving unit, configured to receive the number of paired users delivered by the base station, N;

发射功率控制单元，用于根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。有益效果 And a transmit power control unit, configured to determine, according to the number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c, the transmit power of the paired user equipment. Beneficial effect

在本发明实施例中，当基站采用 256QAM的调制编码方式时，通过功率回退值 m对基站的发射功率进行回退，其中 m为不等于 0的实数，保证了 PA能够工作在线性区域。附图说明 In the embodiment of the present invention, when the base station adopts the modulation and coding mode of 256QAM, the transmit power of the base station is backed off by the power backoff value m, where m is a real number not equal to 0, which ensures that the PA can work in the linear region. DRAWINGS

图 1是本发明实施例一提供的功率控制方法的实现流程图 FIG. 1 is a flowchart of implementing a power control method according to Embodiment 1 of the present invention;

图 2是本发明实施例二提供的功率控制方法的实现流程图 2 is a flowchart of implementing a power control method according to Embodiment 2 of the present invention.

图 3是本发明实施例三提供的功率控制方法的实现流程图 3 is a flowchart of implementing a power control method according to Embodiment 3 of the present invention.

图 4是本发明实施例四提供的功率控制方法的实现流程图 4 is a flowchart of implementing a power control method according to Embodiment 4 of the present invention.

图 5是本发明实施例五提供的功率控制方法的实现流程图 FIG. 5 is a flowchart of implementing a power control method according to Embodiment 5 of the present invention;

图 6是本发明实施例六提供的基站的结构框图； 6 is a structural block diagram of a base station according to Embodiment 6 of the present invention;

图 7是本发明实施例七提供的用户设备的结构框图。本发明的实施方式 FIG. 7 is a structural block diagram of a user equipment according to Embodiment 7 of the present invention. Embodiments of the invention

为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。在本发明实施例中，当基站采用 256正交振幅调制 QAM的调制编码方式时，由所述基站基于预先生成的功率回退值为 m对发射至用户的发射信号的功率进行功率回退，所述 m为不等于 0的实数。 The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In the embodiment of the present invention, when the base station adopts a modulation and coding mode of 256 orthogonal amplitude modulation QAM, the base station performs power backoff on the power of the transmission signal transmitted to the user, based on the pre-generated power backoff value m. The m is a real number not equal to zero.

以下结合： The following combinations:

实施例一 Embodiment 1

图 1示出了本发明实施例一提供的功率控制方法的实现流程，通过该功率控制方法可以由基站对下行发射功率进行控制，详述如下： FIG. 1 is a flowchart of an implementation of a power control method according to Embodiment 1 of the present invention. The power control method can control downlink transmit power by a base station, as follows:

在步骤 S101中，当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数。 In step S101, when the base station adopts the modulation coding mode of the 256 quadrature amplitude modulation QAM, a power backoff value m is generated, and the m is a real number not equal to 0.

目前 LTE中的下行功率调整采用的方式是：假定下行公共导频的每资源单元功率恒定不变，通过调整下行业务数据信道的每资源单元功率和公共导频的每资源单元功率比值 ^和^ (分别对应不包含公共导频的资源符号和包含公共导频的资源符号上的每资源单元功率比值 )来间接实现对业务数据信道每资源单元功率的调整。 The current downlink power adjustment in LTE adopts the following method: assuming that the power per resource unit of the downlink common pilot is constant, by adjusting the power per resource unit of the downlink service data channel and the power ratio per resource unit of the common pilot ^ and ^ The adjustment of the power per resource unit of the service data channel is indirectly implemented (corresponding to the resource symbol not including the common pilot and the resource ratio per resource unit on the resource symbol including the common pilot).

立中， PA = ^ WB] P_B = + ₅[dB] 为用卢设备在不同传输模式和调制编码方式下相对于基准或的相对调整量，目前除 MU-MIMO传输机制外，此值均设置为 0 In the middle, PA = ^ WB] P _B = + ₅ [dB] is the relative adjustment of the device with different reference modes and modulation coding modes. Currently, except for the MU-MIMO transmission mechanism, this value is Set to 0

在本实施例中，扩展业务数据信道的每资源单元功率和公共导频的每资源单元功率比值 ^和^中的^ 至 {m, 0 }，其中，将 m作为基站在 256QAM 调制编码方式下的功率回退值， m为不等于 0的实数；而 0为基站在其他调制编码方式下的功率回退值。 In this embodiment, the power per unit resource power of the service data channel and the power per unit resource ratio of the common pilot are ^ to {m, 0 }, where m is used as the base station in the 256QAM modulation and coding mode. The power backoff value, m is a real number not equal to 0; and 0 is the power backoff value of the base station in other modulation and coding modes.

具体的， m 的确定方法为：基站根据不同调制编码方式下的 EVM需求或信干噪比需求来决定当基站从其他低阶调制方式跳转到 256 QAM时所需要的功率回退值 m Specifically, the determining method of m is: the base station determines the power backoff value required when the base station jumps from other low-order modulation modes to 256 QAM according to the EVM requirement or the signal-to-noise ratio requirement in different modulation and coding modes.

假定 256QAM的 EVM或信干噪比需求为 a,而跳转的低阶调制方式的 EVM 或信干噪比需求为 b, 则 m=101ogl0(b/a)或 m=101ogl0(a/b)。如基站在 64 QAM 下的 EVM需求为 8% ,而 256 QAM下的 EVM需求为 4%，此时当基站从 64 QAM 跳转到 256QAM 时，所需要的功率回退值的上限和下限分别为 -101oglO(8%/4%)dB 和 101oglO(8%/4%)dB, 而从其他调制编码方式跳转到 256QAM的功率回退值可类似确定。 Assuming that the EVM or signal to interference and noise ratio requirement of 256QAM is a, and the EVM or signal to interference and noise ratio requirement of the low-order modulation mode of the jump is b, then m=101ogl0(b/a) or m=101ogl0(a/b) . Such as the base station at 64 QAM The EVM requirement is 8%, and the EVM requirement under 256 QAM is 4%. At this time, when the base station jumps from 64 QAM to 256QAM, the upper and lower limits of the required power backoff value are -101oglO (8%). /4%) dB and 101oglO (8%/4%) dB, and the power backoff value from other modulation coding modes to 256QAM can be similarly determined.

在步骤 S102中，由所述基站基于所述 m对发射至用户设备的发射信号的功率进行功率回退。 In step S102, the base station performs power backoff on the power of the transmission signal transmitted to the user equipment based on the m.

本实施例，当基站采用 256QAM的调制编码方式时，通过功率回退值 m 对基站的发射功率进行回退，其中 m为不等于 0的实数，保证了 PA能够工作在线性区域。 In this embodiment, when the base station adopts the 256QAM modulation and coding mode, the base station's transmit power is backed by the power backoff value m, where m is a real number not equal to 0, which ensures that the PA can work in a linear region.

实施例二 Embodiment 2

图 2示出了本发明实施例二提供的功率控制方法的实现流程，通过该功率控制方法可以由基站对下行发射功率进行控制，详述如下： FIG. 2 is a flowchart showing an implementation process of a power control method according to Embodiment 2 of the present invention. The power control method can control downlink transmit power by a base station, as follows:

在步骤 S201中，当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数。 In step S201, when the base station adopts the modulation coding mode of the 256 quadrature amplitude modulation QAM, a power backoff value m is generated, and the m is a real number not equal to 0.

在本发明实施例中，当基站工作在 SC-FDMA下时， 256QAM调制编码后的数据被放置在某些专用子帧上进行传输。此时，在这些专用子帧上，基站对所有用户的发射功率进行回退。具体的 m的确定方式请参见实施例一中的描述，在此不再赘述。 In the embodiment of the present invention, when the base station operates under SC-FDMA, the 256QAM modulated and encoded data is placed on some dedicated subframes for transmission. At this time, on these dedicated subframes, the base station rolls back the transmission power of all users. For the specific m determination method, refer to the description in the first embodiment, and details are not described herein again.

在步骤 S202中，当基站工作在单载波频分多址 SC-FDMA下时，由所述基站基于所述 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退。 In step S202, when the base station operates under single carrier frequency division multiple access SC-FDMA, the base station transmits to all of the subframes based on the m transmitting 256 quadrature amplitude modulated QAM modulation encoded data. The power of the transmitted signal of the user equipment is powered back.

本实施例，当基站采用 256QAM的调制编码方式时，并且工作在 SC-FDMA 下时，通过功率回退值 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退，其中 m为不等于 0 的实数，保证了 PA能够工作在线性区域。 In this embodiment, when the base station adopts the modulation coding mode of 256QAM, and works under SC-FDMA, the power backoff value m is transmitted to all the subframes in the 256 orthogonal amplitude modulation QAM modulation coded data. The power of the transmitted signal of the user equipment is power-returned, where m is a real number not equal to 0, which ensures that the PA can operate in a linear region.

实施例三图 3示出了本发明实施例三提供的功率控制方法的实现流程，通过该功率控制方法可以由基站对下行发射功率进行控制，详述如下： Embodiment 3 FIG. 3 is a flowchart showing an implementation process of a power control method according to Embodiment 3 of the present invention. The power control method can control downlink transmit power by a base station, as follows:

在步骤 S301中，当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数。 In step S301, when the base station adopts the modulation coding mode of the 256 quadrature amplitude modulation QAM, a power backoff value m is generated, and the m is a real number not equal to 0.

在本实施例中，当基站工作在 OFDMA下时，没有专门预留的子帧来传输 256QAM调制编码后的数据，这意味着每个子帧内在***带宽对应的时频资源上，既有使用 256 QAM调制编码方式的用户，又有使用其他调制编码方式的用户。具体的 m的确定方式请参见实施例一中的描述，在此不再赘述。考虑到 PA 在不同频域资源上的功率差范围受限于集合 {-6,-4.77,-3,-1.77, 0, 1, 2, 3 }的上界和下界，所以上述 m的取值应使得的范围不超过集合 {-3,-2,-1,0, 1.77, 3, 4.77, 6} 的上界和下界。 In this embodiment, when the base station works under OFDMA, there is no specially reserved subframe to transmit 256QAM modulation and encoded data, which means that each subframe has 256 times of time-frequency resources corresponding to the system bandwidth. Users of the QAM modulation and coding scheme have users who use other modulation and coding schemes. For the specific m determination method, refer to the description in the first embodiment, and details are not described herein again. Considering that the power difference range of the PA in different frequency domain resources is limited by the upper and lower bounds of the set {-6, -4.77, -3, -1.77, 0, 1, 2, 3 }, the value of the above m The range should be such that the upper and lower bounds of the set {-3, -2, -1, 0, 1.77, 3, 4.77, 6} are not exceeded.

在步骤 S302中，当基站工作在正交频分多址 OFDMA下时，由所述基站基于所述 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退。 In step S302, when the base station operates under orthogonal frequency division multiple access OFDMA, the base station performs power backoff based on the m to the power of the transmission signal of the user equipment transmitted to the 256QAM modulation and coding mode.

本实施例，当基站采用 256QAM的调制编码方式时，并且工作在 OFDMA 下时，通过功率回退值 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退，其中 m为不等于 0的实数，保证了 PA能够工作在线性区域。 In this embodiment, when the base station adopts the modulation and coding mode of 256QAM, and works under OFDMA, the power of the transmission signal of the user equipment transmitted to the 256QAM modulation and coding mode is power-returned by the power backoff value m, where m is A real number that is not equal to 0 ensures that the PA can operate in a linear region.

实施例四 Embodiment 4

图 4示出了本发明实施例四提供的功率控制方法的实现流程，通过该功率控制方法可以由基站对下行发射功率进行控制，还可以由用户设备对上行发射至基站的发射功率进行控制，详述如下： FIG. 4 is a flowchart of an implementation of a power control method according to Embodiment 4 of the present invention. The power control method may be used to control downlink transmit power by a base station, and may also control, by a user equipment, uplink transmit power to a base station. Details are as follows:

在步骤 S401中，当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数。 In step S401, when the base station adopts the modulation coding mode of the 256 quadrature amplitude modulation QAM, a power backoff value m is generated, and the m is a real number not equal to 0.

在步骤 S402中，由所述基站基于所述 m对发射至用户设备的发射信号的功率进行功率回退。在本实施例中，当基站工作在单载波频分多址 SC-FDMA下时，由所述基站基于预先所述 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退。 In step S402, the base station performs power backoff on the power of the transmission signal transmitted to the user equipment based on the m. In this embodiment, when the base station operates under single carrier frequency division multiple access SC-FDMA, the base station transmits on the subframe of transmitting 256 orthogonal amplitude modulated QAM modulation encoded data based on the foregoing m. The power of the transmitted signal to all user equipments is powered back.

当基站工作在正交频分多址 OFDMA下时，由所述基站基于所述 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退。 When the base station operates under orthogonal frequency division multiple access OFDMA, the base station performs power backoff based on the m to transmit the power of the transmission signal of the user equipment transmitted to the 256QAM modulation and coding mode.

具体的 m的确定方式请参见实施例一中的描述，在此不再赘述。 For the specific m determination method, refer to the description in the first embodiment, and details are not described herein again.

在步骤 S403中，当基站工作在时分双工 TDD业务自适应子帧配比和上行多用户配对场景下时，由基站下发配对用户数 N至配对用户设备，以由所述配对用户设备根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c 上的总发射功率确定所述配对用户设备的发射功率。 In step S403, when the base station is working in the time division duplex TDD service adaptive subframe ratio and the uplink multi-user pairing scenario, the base station sends the number of paired users N to the paired user equipment to be used by the paired user equipment. The number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c determine the transmit power of the paired user equipment.

在本实施例中，当基站工作在时分双工 TDD业务自适应子帧配比和上行多用户配对场景下，并且所述基站是低功率（23dBm ) 小站时，处于上行时隙的所述基站根据测得的信道状态信息（Channel State Information, CSI )进行上行数据的调度，并将每资源块上同时发射数据的总用户数 N下发给各配对用户设备，配对用户设备基于此 N值，利用如下的公式设置自己的发射功率^ _SCT。( ) : roscH,c( = min In this embodiment, when the base station operates in a time division duplex TDD service adaptive subframe ratio and an uplink multi-user pairing scenario, and the base station is a low power (23 dBm) small station, the The base station performs uplink data scheduling according to the measured channel state information (CSI), and sends the total number N of users simultaneously transmitting data on each resource block to each paired user equipment, and the paired user equipment is based on the N value. , use the following formula to set your own transmit power ^ _SCT . ( ) : roscH,c( = min

| l01og₁₀ (M_{PUSCH c} (0) + ^o_PuscH,c (i) + «_C (J) · PL + A_TFiC (i) + f_c (i) 其中， p_CMAX， ω为用户设备在主服务小区载波 C上的总发射功率； L01og ₁₀ (M _{PUSCH c} (0) + ^o_PuscH,c (i) + « _C (J) · PL + A _TFiC (i) + f _c (i) where p _CMAX , ω are the main services of the user equipment The total transmit power on the cell carrier C;

^MpuscH»为物理上行共享信道 PUSCH调度资源块数目，单位为物理资源块 PRB; ^MpuscH » the number of resource blocks for the physical uplink shared channel PUSCH, in units of physical resource blocks PRB;

^0_PUSCH,c (i)包括尸。— NOMINAL— PUSCH,c (J')和 ^0_UE_PUSCH ,c ( i )两项, 为用户设备的目标接收功率，由高层无线资源控制协议 RRC信令半静态配置； ^0_PUSCH,c (i) includes the corpse. – NOMINAL—PUSCH,c (J') and ^0_UE_PUSCH, c ( i ), which are the target receiving power of the user equipment, and are semi-statically configured by the RRC signaling of the upper layer radio resource control protocol;

a^^j) 是路损补偿因子，由高层 RRC信令半静态配置； a^ ^j) is a path loss compensation factor, which is semi-statically configured by higher layer RRC signaling;

P 是用户设备基于参考信号接收功率 RSRP的路损测量值； P is a path loss measurement value of the user equipment based on the reference signal received power RSRP;

β₀ ^{Ρ Η})是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置；

β ₀ ^{Ρ Η} ) is the power adjustment value for different modulation and coding methods. Semi-static configuration by higher layer RRC signaling;

是闭环功率调整量，是接收端根据接收 /测量误差量化出来的反馈值。 It is the closed-loop power adjustment amount, which is the feedback value quantified by the receiving end based on the reception/measurement error.

本实施例，当基站工作在时分双工 TDD业务自适应子帧配比和上行多用户配对场景下，由基站下发配对用户数 N至每个配对用户设备，再由所述配对用户设备根据所述配对用户数 N进行用户发射功率的限制，可以达到快速减小用户发送的上行信号对低功率（23dBm )基站发送的下行信号干扰的目的。 In this embodiment, when the base station works in the time-division duplex TDD service adaptive subframe ratio and the uplink multi-user pairing scenario, the base station sends the number of paired users N to each paired user equipment, and then the paired user equipment The number of paired users N limits the transmission power of the user, and can quickly reduce the interference of the uplink signal sent by the user to the downlink signal transmitted by the low power (23 dBm) base station.

实施例五 Embodiment 5

图 5示出了本发明实施例五提供的功率控制方法的实现流程，该方法是由用户设备对上行发射至基站的发射功率进行控制，详述如下： FIG. 5 is a flowchart showing an implementation process of a power control method according to Embodiment 5 of the present invention, where the user equipment controls the transmit power of the uplink transmission to the base station, as follows:

在步骤 S501中，接收基站下发的配对用户数 N。 In step S501, the number N of paired users delivered by the base station is received.

在本实施例中，配对用户设备接收基站下发的配对用户数 N。 In this embodiment, the paired user equipment receives the number N of paired users delivered by the base station.

在步骤 S502中，根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 In step S502, the transmit power of the paired user equipment is determined according to the number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c.

在本实施例中，配对用户设备按照如下公式确定配对用户设备的发射功率 In this embodiment, the paired user equipment determines the transmit power of the paired user equipment according to the following formula:

•^PUSCH.c (') *

+尸。 _PUSCH, ) + _c ( j) · PL + A_TF,_c (i) + f_c 其中， P_CMAX， ( 为用户设备在主服务小区载波 C上的总发射功率； •^PUSCH.c (') *

+ corpse. _PUSCH , ) + _c ( j) · PL + A _TF , _c (i) + f _c where P _CMAX , ( is the total transmit power of the user equipment on the primary serving cell carrier C;

M_PUSCH，。《为物理上行共享信道 puSCH调度资源块数目，单位为物理资源块 PRB; M _PUSCH,. "The number of resource blocks scheduled for the physical uplink shared channel puSCH, the unit is the physical resource block PRB;

^0_PUSCH,c(i)包括尸。— NOMINAL— PUSCH,c(J')和 ^0_UE_PUSCH ,c ( i )两项, 为用户设备的目标接收功率，由高层无线资源控制协议 RRC信令半静态配置； ^0_PUSCH, c(i) includes the corpse. – NOMINAL—PUSCH, c(J') and ^0_UE_PUSCH, c(i), which are the target receiving power of the user equipment, and are semi-statically configured by the RRC signaling of the upper layer radio resource control protocol;

P 是用户设备基于参考信号接收功率 RSRP的路损测量值；

)是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置； P is a path loss measurement value of the user equipment based on the reference signal received power RSRP;

Is a power adjustment value for different modulation and coding modes, semi-statically configured by higher layer RRC signaling;

«是闭环功率调整量，是接收端根据接收 /测量误差量化出来的反馈值。 «It is the closed-loop power adjustment amount, which is the feedback value quantified by the receiving end based on the reception/measurement error.

本实施例，当基站工作在时分双工 TDD业务自适应子帧配比和上行多用户配对场景下，用户设备根据基站下发的配对用户数 N 进行用户发射功率的限制，可以达到快速减小用户发送的上行信号对低功率（23dBm )基站发送的下行信号干扰的目的。 In this embodiment, when the base station works in the time-division duplex TDD service adaptive subframe ratio and the uplink multi-user pairing scenario, the user equipment limits the user transmit power according to the number of paired users N sent by the base station, which can be rapidly reduced. The purpose of the uplink signal sent by the user to interfere with the downlink signal transmitted by the low power (23dBm) base station.

实施例六 Embodiment 6

图 6示出了本发明实施例六提供的基站的具体结构框图，为了便于说明，仅示出了与本发明实施例相关的部分。所述基站 6包括：功率回退值生成单元 61和功率控制单元 62。 FIG. 6 is a block diagram showing a specific structure of a base station according to Embodiment 6 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown. The base station 6 includes: a power backoff value generating unit 61 and a power control unit 62.

功率回退值生成单元 61 , 用于当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数，所述 m的值由不同调制编码方式下的误差向量幅度 EVM需求或信干噪比需求来确定。具体的 m的确定方式请参见实施例一中的描述，在此不再赘述； The power backoff value generating unit 61 is configured to generate a power backoff value m when the base station adopts a modulation and coding mode of 256 orthogonal amplitude modulation QAM, where the m is a real number not equal to 0, and the value of the m is The error vector magnitude EVM requirement or the signal to interference and noise ratio requirement in different modulation and coding modes is determined. For the specific m determination method, refer to the description in the first embodiment, and details are not described herein.

功率控制单元 62,用于基于所述 m对发射至用户设备的发射信号的功率进行功率回退。 The power control unit 62 is configured to perform power backoff based on the power of the transmit signal transmitted to the user equipment by the m.

具体的，所述功率控制单元 62包括第一功率控制模块和 /或功率控制单元。其中，第一功率控制模块，用于当基站工作在单载波频分多址 SC-FDMA 下时，由所述基站基于所述 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退； Specifically, the power control unit 62 includes a first power control module and/or a power control unit. The first power control module is configured to: when the base station operates under single carrier frequency division multiple access (SC-FDMA), the base station transmits, according to the m, a sub-frame of 256 orthogonal amplitude modulated QAM modulation encoded data. Power-returning the power of the transmitted signal transmitted to all user equipments;

第二功率控制模块，用于当基站工作在正交频分多址 OFDMA下时，由所述基站基于所述 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退，所述 m的取值不超过集合 {-3,-2,-1,0, 1.77, 3, 4.77, 6}的上界和下界。进一步地，所述功率控制单元 62还包括：配对用户数下发模块，该模块用于当基站工作在时分双工 TDD 业务自适应子帧配比和上行多用户配对场景下时，由基站下发配对用户数 N至配对用户设备，以由所述配对用户设备根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 a second power control module, configured to: when the base station operates under orthogonal frequency division multiple access (OFDMA), perform power backoff by the base station based on the m to transmit power of a user equipment that is transmitted to a 256QAM modulation and coding mode, The value of m does not exceed the upper and lower bounds of the set {-3, -2, -1, 0, 1.77, 3, 4.77, 6}. Further, the power control unit 62 further includes: a pairing user number sending module, where the module is used by the base station when the base station works in the time division duplex TDD service adaptive subframe ratio and the uplink multi-user pairing scenario Transmitting the number of users N to the paired user equipment, to determine, by the paired user equipment, the transmit power of the paired user equipment according to the number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c .

本发明实施例提供的基站可以应用在前述对应的方法实施例一、二、三、四中，详情参见上述实施例一、二、三、四中的描述，在此不再赘述。 The base station provided by the embodiment of the present invention can be applied to the foregoing method, the first, the second, the third, the fourth, and the fourth embodiment. For details, refer to the description in the first, second, third, and fourth embodiments, and details are not described herein again.

实施例七 Example 7

图 7示出了本发明实施例七提供的用户设备的具体结构框图，为了便于说明，仅示出了与本发明实施例相关的部分。所述用户设备 7包括配对用户数接收单元 71和发射功率控制单元 72。 FIG. 7 is a block diagram showing a specific structure of a user equipment according to Embodiment 7 of the present invention. For convenience of description, only parts related to the embodiment of the present invention are shown. The user equipment 7 includes a paired user number receiving unit 71 and a transmission power control unit 72.

其中，配对用户数接收单元 71 , 用于接收基站下发的配对用户数 N; The paired user number receiving unit 71 is configured to receive the number of paired users delivered by the base station, N;

发射功率控制单元 72,用于根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 The transmit power control unit 72 is configured to determine, according to the number of paired users N and the total transmit power of the paired user equipment on the primary serving cell carrier c, the transmit power of the paired user equipment.

具体的，所述发射功率控制单元 72包括：发射功率控制模块，该模块用于根据下述公式确定所述配对用户设备的发射功率 ^PpuscH»： Specifically, the transmit power control unit 72 includes: a transmit power control module, configured to determine a transmit power ^{PpuscH of} the paired user equipment according to the following formula:

P_c P _c

101og₁₀ (M_{PUSCH c} (0) + ^o_PuscH,c (i) + a_c ( f) · PL + A_{TF c} ( ) + f_c (ΐ) 其中， ^PCMAX， )为所述配对用户设备在主服务小区载波 c上的总发射功率； 101og ₁₀ (M _{PUSCH c} (0) + ^o_PuscH,c (i) + a _c (f) · PL + A _{TF c} ( ) + f _c (ΐ) where ^P CMAX, ) is the paired user equipment The total transmit power on the primary serving cell carrier c;

是用户设备基于参考信号接收功率 RSRP的路损测量值；

)是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置； Is a path loss measurement value of the user equipment based on the reference signal receiving power RSRP;

本发明实施例提供的用户设备可以应用在前述对应的方法实施例五中，详情参见上述实施例五的描述，在此不再赘述。 The user equipment provided by the embodiment of the present invention may be applied to the foregoing method embodiment 5 of the foregoing method. For details, refer to the description of the foregoing fifth embodiment, and details are not described herein again.

值得注意的是，上述***实施例中，所包括的各个单元只是按照功能逻辑进行划分的，但并不局限于上述的划分，只要能够实现相应的功能即可；另外，各功能单元的具体名称也只是为了便于相互区分，并不用于限制本发明的保护范围。 It should be noted that, in the foregoing system embodiment, each unit included is only divided according to functional logic, but is not limited to the above division, as long as the corresponding function can be implemented; in addition, the specific name of each functional unit It is also for convenience of distinguishing from each other and is not intended to limit the scope of protection of the present invention.

另外，本领域普通技术人员可以理解实现上述各实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，相应的程序可以存储于一计算机可读取存储介质中，所述的存储介质，如 ROM/RAM、磁盘或光盘等。 In addition, those skilled in the art can understand that all or part of the steps of implementing the above embodiments may be completed by a program instructing related hardware, and the corresponding program may be stored in a computer readable storage medium. Storage media, such as ROM/RAM, disk or CD.

以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。 The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection of the present invention. Within the scope.

Claims

权利要求书 claims

1、一种功率控制方法，其特征在于，所述方法包括： 1. A power control method, characterized in that the method includes:

当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数； When the base station adopts the modulation and coding method of 256 quadrature amplitude modulation QAM, a power backoff value of m is generated, and m is a real number not equal to 0;

由所述基站基于所述 m对发射至用户设备的发射信号的功率进行功率回退。 The base station performs power backoff on the power of the transmission signal transmitted to the user equipment based on the m.

2、如权利要求 1所述的方法，其特征在于，所述当基站采用 256正交振幅调制 QAM的调制编码方式时，由所述基站基于所述 m对发射至用户设备的发射信号的功率进行功率回退具体为： 2. The method of claim 1, wherein when the base station adopts the modulation and coding method of 256 quadrature amplitude modulation QAM, the base station determines the power of the transmission signal transmitted to the user equipment based on the m pairs. The specific steps for power rollback are:

当基站工作在单载波频分多址 SC-FDMA下时，由所述基站基于所述 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退。 When the base station operates under single carrier frequency division multiple access SC-FDMA, the base station uses the m to transmit signals transmitted to all user equipments on the subframes that transmit 256 quadrature amplitude modulation QAM modulation-encoded data. perform power rollback.

3、如权利要求 1所述的方法，其特征在于，所述当基站采用 256正交振幅调制 QAM的调制编码方式时，由所述基站基于所述 m对发射至用户设备的发射信号的功率进行功率回退具体为： 3. The method of claim 1, wherein when the base station adopts the modulation and coding method of 256 quadrature amplitude modulation QAM, the base station determines the power of the transmission signal transmitted to the user equipment based on the m pairs. The specific steps for power rollback are:

当基站工作在正交频分多址 OFDMA下时，由所述基站基于所述 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退。 When the base station operates under Orthogonal Frequency Division Multiple Access OFDMA, the base station performs power backoff on the power of the transmission signal transmitted to the user equipment in the 256QAM modulation and coding mode based on the m.

4、如权利要求 1所述的方法，其特征在于，所述 m的值由不同调制编码方式下的误差向量幅度 EVM需求或信干噪比需求来确定。 4. The method of claim 1, wherein the value of m is determined by error vector amplitude EVM requirements or signal-to-interference-to-noise ratio requirements under different modulation and coding modes.

5、如权利要求 3 所述的方法，其特征在于，所述 m 的取值不超过集合 {-3,-2,-1,0, 1.77, 3, 4.77, 6}的上界和下界。 5. The method of claim 3, wherein the value of m does not exceed the upper and lower bounds of the set {-3,-2,-1,0, 1.77, 3, 4.77, 6}.

6、如权利要求 1所述的方法，其特征在于，所述方法还包括： 6. The method of claim 1, wherein the method further includes:

当基站工作在时分双工 TDD 业务自适应子帧配比和上行多用户配对场景下时，由基站下发配对用户数 N至配对用户设备，以由所述配对用户设备根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 When the base station works in a time division duplex TDD service adaptive subframe ratio and uplink multi-user pairing scenario, the base station delivers the number of paired users N to the paired user equipment, so that the paired user equipment can use the paired user equipment according to the number of paired users. N and the total transmit power of the paired user equipment on the primary serving cell carrier c determine the transmit power of the paired user equipment.

7、一种基站，其特征在于，所述基站包括： 7. A base station, characterized in that, the base station includes:

功率回退值生成单元，用于当基站采用 256正交振幅调制 QAM的调制编码方式时，生成一个功率回退值为 m, 所述 m为不等于 0的实数； The power backoff value generation unit is used to generate a power backoff value m when the base station adopts the modulation coding method of 256 quadrature amplitude modulation QAM, where m is a real number not equal to 0;

功率控制单元，用于基于所述 m对发射至用户设备的发射信号的功率进行功率回退。 A power control unit configured to perform power backoff on the power of the transmission signal transmitted to the user equipment based on the m.

8、如权利要求 7所述的基站，其特征在于，所述功率控制单元包括：第一功率控制模块，用于当基站工作在单载波频分多址 SC-FDMA下时，基于所述 m在传输 256正交振幅调制 QAM调制编码后的数据的子帧上对发射至所有用户设备的发射信号的功率进行功率回退。 8. The base station according to claim 7, wherein the power control unit includes: a first power control module, configured to: when the base station operates under single carrier frequency division multiple access SC-FDMA, based on the m Power backoff is performed on the power of the transmission signal transmitted to all user equipments on the subframe in which the 256 quadrature amplitude modulation QAM modulation-encoded data is transmitted.

9、如权利要求 7所述的基站，其特征在于，所述功率控制单元包括：第二功率控制模块，用于当基站工作在正交频分多址 OFDMA下时，基于所述 m对发射至 256QAM调制编码方式的用户设备的发射信号的功率进行功率回退。 9. The base station according to claim 7, wherein the power control unit includes: a second power control module, configured to transmit based on the m pairs when the base station operates under Orthogonal Frequency Division Multiple Access OFDMA. The power of the transmitted signal of the user equipment in the 256QAM modulation and coding mode is reduced to power backoff.

10、如权利要求 7所述的基站，其特征在于，所述 m的值由不同调制编码方式下的误差向量幅度 EVM需求或信干噪比需求来确定。 10. The base station according to claim 7, wherein the value of m is determined by the error vector amplitude EVM requirement or the signal-to-interference-to-noise ratio requirement under different modulation and coding modes.

11、如权利要求 9所述的基站，其特征在于，所述 m的取值不超过集合 {-3,-2,-1,0, 1.77, 3, 4.77, 6}的上界和下界。 11. The base station of claim 9, wherein the value of m does not exceed the upper and lower bounds of the set {-3,-2,-1,0, 1.77, 3, 4.77, 6}.

12、如权利要求 7所述的基站，其特征在于，所述功率控制单元还包括：配对用户数下发模块，用于当基站工作在时分双工 TDD业务自适应子帧配比和上行多用户配对场景下时，由基站下发配对用户数 N至配对用户设备，以由所述配对用户设备根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 12. The base station according to claim 7, characterized in that the power control unit further includes: a paired user number delivery module, used for adaptive subframe allocation and uplink multiplexing when the base station operates in time division duplex TDD service. In the user pairing scenario, the base station delivers the number of paired users N to the paired user equipment, so that the paired user equipment can use the paired user equipment according to the number of paired users N and the total transmit power of the paired user equipment on the main serving cell carrier c. Determine the transmit power of the paired user equipment.

13、一种功率控制方法，其特征在于，所述方法包括： 13. A power control method, characterized in that the method includes:

配对用户设备接收基站下发的配对用户数 N; The paired user equipment receives the number of paired users N sent by the base station;

根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 The transmit power of the paired user equipment is determined according to the number N of paired users and the total transmit power of the paired user equipment on the primary serving cell carrier c.

14、如权利要求 13所述的方法，其特征在于，所述根据所述配对用户数 N 以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率具体为： 14. The method of claim 13, wherein: determining the transmit power of the paired user equipment based on the number of paired users N and the total transmit power of the paired user equipment on the main serving cell carrier c Specifically:

根据下述公式确定所述配对用户设备的发射功率 ^PpuscH )： The transmit power ^{Ppusch (PpuschH} ) of the paired user equipment is determined according to the following formula:

„ ,.、 . _CMAX,_C / W, ] „ ,., . _CM AX, _C / W, ]

' {l01og₁₀ (M_pusc¾c (0) + Po roscH, ( J) + _c (j) - PL_c + A_mc (0 + f_c . 其中， ^PCMAX， )为所述配对用户设备在主服务小区载波 c上的总发射功率； ' {l01og ₁₀ (M _pusc¾c (0) + Po roscH, ( J) + _c (j) - PL _c + A _mc (0 + f _c . Where, ^PCMAX , ) is the paired user equipment in the main serving cell The total transmit power on carrier c;

M_PUSCH，。《为物理上行共享信道 PUSCH调度资源块数目，单位为物理资源块 PRB; M _PUSCH ,. <The number of resource blocks scheduled for the physical uplink shared channel PUSCH, the unit is physical resource block PRB;

^0_PUSCH,c (i)包括尸。— NOMINAL— PUSCH,c (J')和 ^0_UE_PUSCH ,c ( i )两项, 为用户设备的目标接收功率，由高层无线资源控制协议 RRC信令半静态配置； ^0_PUSCH,c (i) includes corpse. — NOMINAL — PUSCH,c (J') and ^0_UE_PUSCH,c (i) are the target received power of the user equipment, semi-statically configured by the high-level radio resource control protocol RRC signaling;

" '）是路损补偿因子，由高层 RRC信令半静态配置； P 是用户设备基于参考信号接收功率 RSRP的路损测量值；

β₀ ^{Ρ Η})是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置； "') is the path loss compensation factor, semi-statically configured by high-level RRC signaling; P is the path loss measurement value of the user equipment based on the reference signal received power RSRP;

β ₀ ^{P H} ) is the power adjustment value for different modulation and coding methods, semi-statically configured by high-level RRC signaling;

W是闭环功率调整量，是接收端根据接收 /测量误差量化出来的反馈值。 W is the closed-loop power adjustment amount, which is the feedback value quantified by the receiving end based on the receiving/measurement error.

15、一种用户设备，其特征在于，所述用户设备包括： 15. A user equipment, characterized in that the user equipment includes:

配对用户数接收单元，用于接收基站下发的配对用户数 N; The number of paired users receiving unit is used to receive the number of paired users N sent by the base station;

发射功率控制单元，用于根据所述配对用户数 N以及所述配对用户设备在主服务小区载波 c上的总发射功率确定所述配对用户设备的发射功率。 A transmission power control unit, configured to determine the transmission power of the paired user equipment according to the number of paired users N and the total transmission power of the paired user equipment on the main serving cell carrier c.

16、如权利要求 15所述的用户设备，其特征在于，所述发射功率控制单元包括： 16. The user equipment according to claim 15, characterized in that, the transmission power control unit includes:

发射功率控制模块，用于根据下述公式确定所述配对用户设备的发射功率 Transmit power control module, used to determine the transmit power of the paired user equipment according to the following formula

^PUSCH,c · ^CMAX,c (^PUSCH,c · ^CMAX,c (

PuscH,e( = min I , N , PuscH,e( = min I , N ,

| l01og₁₀ (M_{PUSCH c} (0) +

+ «_C (J) · Ph + A_TFiC (i) + f_c (i) 其中， ^MA^ W为所述配对用户设备在主服务小区载波 c上的总发射功率； | l01og ₁₀ (M _{PUSCH c} (0) +

+ « _C (J) · Ph + A _TFiC (i) + f _c (i) Where, ^MA^ W is the total transmit power of the paired user equipment on the main serving cell carrier c;

M_PUSCH，。《为物理上行共享信道 PUSCH调度资源块数目，单位为物理资源块 PRB; 尸。— PUSCH, c (J')包括尸。— NOMINAL— PUSCH,c ( J')和 ^0_UE_PUSCH ,c ( i )两项, 为用户设备的目标接收功率，由高层无线资源控制协议 RRC信令半静态配置； a^^j) 是路损补偿因子，由高层 RRC信令半静态配置； M _PUSCH ,. <The number of resource blocks scheduled for the physical uplink shared channel PUSCH, the unit is the physical resource block PRB; — PUSCH, c (J') includes corpse. — NOMINAL—PUSCH,c (J') and ^0_UE_PUSCH,c (i) are the target received power of the user equipment, semi-statically configured by the high-level radio resource control protocol RRC signaling; a^ ^j) is the path loss compensation Factor, semi-statically configured by higher-layer RRC signaling;

P 是用户设备基于参考信号接收功率 RSRP的路损测量值； P is the path loss measurement value of the user equipment based on the reference signal received power RSRP;

是对不同的调制编码方式的功率调整值，由高层 RRC信令半静态配置；

It is the power adjustment value for different modulation and coding methods, semi-statically configured by high-level RRC signaling;