CN102076072B - Uplink power control method, user equipment and carrier aggregation system - Google Patents

Abstract

The invention discloses an uplink power control method, user equipment (UE) and a carrier aggregation (CA) system. The method comprises the following steps: the UE receives open loop power control parameters of component carrier (CC) from a base station, acquires path loss values for each CC of the UE and the base station, determines initial transmitting power for each CC of the UE in accordance with the open loop power control parameters and the path loss values; if the initial transmitting power is required to adjust, the UE sets power allocation priority coefficients sent to the base station among all types of channels; the UE sets power allocation priority coefficients sent to the base station inside a plurality of Bs; and the transmitting power for the CCs of the UE is determined in accordance with the initial transmitting power, the power allocation priority coefficients among all types of channels and the power allocation priority coefficients insides the plurality of Bs. According to the invention, the UE in the CA system is subjected to effective power control, the complexity of the UE is reduced, and the reliability for controlling information by the UE, the performancesof data channels and the overall performances of the system are optimized.

Description

Uplink power control method, user equipment and carrier aggregation system

technical field

The present invention relates to the field of wireless communication, in particular to an uplink power control method, user equipment and a carrier aggregation system including the user equipment.

Background technique

In the uplink of a wireless communication system, the transmit power of UE (User Equipment) directly affects important indicators such as cell edge performance and system spectral efficiency. In the LTE (Long Term Evolution, Long Term Evolution) system of UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System), the uplink transmission power is determined by the path loss of the wireless link (Path Loss), the path loss compensation coefficient, and the target SINR of the receiving end. (Signal to Interference and Noise Ratio, Signal to Interference and Noise Ratio, Signal to Interference and Noise Ratio) and other factors, the base station can also dynamically adjust the transmit power of the UE, and at the same time in various physical channels that are orthogonal in the time domain: PUCCH (Physical Uplink ControlChannel, physical uplink control channel), the power control process of PUSCH w/o UCI (Physical UplinkShared Channel with/without Uplink Control Information, physical uplink shared channel with/without uplink control information) is independent.

In the LTE-Advanced system, in order to improve the performance of the uplink and downlink transmission rates of the system, the CA (Carrier Aggregation, Carrier Aggregation) transmission/reception technology was incorporated into the LTE-Advanced framework by the 3rd Generation Partnership Project (3GPP). In the LTE-Advanced CA scenario, the CC (Component Carrier, carrier unit) specific uplink power control scheme directly affects the performance of the CA UE and the overall system. In the CA system, multiple LTE systems transmit simultaneously, and each LTE system can be regarded as is a CC. Therefore, in the CA scenario, it has become an urgent need to formulate a set of efficient uplink power control scheme suitable for multi-carrier systems.

Contents of the invention

(1) Technical problems to be solved

The technical problem to be solved by the present invention is: how to effectively control the power of the user equipment in the CA system, reduce the complexity of the user equipment, optimize the reliability of the control information of the user equipment, the performance of the data channel and the overall performance of the system.

(2) Technical solution

In order to solve the above technical problems, the present invention provides an uplink power control method, which divides the simultaneous transmission scenarios of multiple data channels with limited power under carrier aggregation into two types: a physical uplink shared channel with uplink control information A, and multiple physical uplink shared channels B without uplink control information provide services for a user equipment UE at the same time; only multiple Bs in multiple carrier components CC provide services for a UE at the same time, based on the above two scenarios , the method includes the following steps:

S1. The UE receives the open-loop power control parameters of the CC sent by the base station;

S2. The UE obtains the path loss value between each CC and the base station;

S3. The UE determines the initial transmit power of each CC of the UE according to the open-loop power control parameter and the path loss value;

S4. If it is determined that the initial transmit power needs to be adjusted, the UE sets the power allocation priority coefficients among various channels used when sending data to the base station;

S5. The UE sets the multiple B internal power allocation priority coefficients sent to the base station;

S6. The UE determines the transmit power of the UE's CC according to the initial transmit power, the power allocation priority coefficients among the various types of channels, and the power allocation priority coefficients within multiple Bs.

Wherein, the open-loop power control parameters include path loss compensation coefficients and parameters reflecting the interference level of the base station.

Wherein, step S2 is specifically:

The UE performs RSRP measurement on each CC to obtain the path loss value; or

The UE performs RSRP measurement on the primary CC to obtain the path loss value of the primary CC; and obtains the path loss offset value of the secondary CC, and adds the path loss value of the primary CC to the path loss offset value of the secondary CC to obtain the path of the secondary CC loss value.

Wherein, step S4 is specifically: the UE sets A as the highest priority to be sent to the base station, and sets the priority of B to be sent to the base station.

Wherein, step S5 is specifically:

The UE sets the priority of each B to be the same; or

The UE sets the priority of each B according to the initial transmit power; or

The UE sets the priority of each B according to the instruction sent by the base station.

Wherein, between steps S3 and S4, steps are also included:

S301. The UE receives a closed-loop power control instruction transmitted by the base station;

S302. The UE adjusts the initial transmit power of each CC of the UE according to the closed-loop power control instruction.

Wherein, in step S4, it is determined whether the initial transmission power needs to be adjusted according to the sum of the initial transmission powers of all CCs.

The present invention also provides a user equipment, which divides the scenario of simultaneous transmission of multiple data channels with limited power under carrier aggregation into two types: one physical uplink shared channel A with uplink control information, and multiple physical uplink shared channels A without The physical uplink shared channel B with uplink control information provides services for one user equipment UE at the same time; only multiple Bs in multiple carrier components CC provide services for one UE at the same time, and the user equipment is used to perform based on the above two scenarios Uplink power control, including:

The receiving device is used to receive the open-loop power control parameters of the CC sent by the base station;

a path loss obtaining device, configured to obtain a path loss value between each CC and the base station;

An initial transmit power determining device, configured to determine the initial transmit power of the CC of the UE according to the open-loop power control parameter and the path loss value;

The inter-channel power allocation priority coefficient acquisition device is used to set the power allocation priority coefficients among various channels used when sending data to the base station;

In-channel power allocation priority coefficient acquisition device, used to set multiple B internal power allocation priority coefficients sent to the base station;

The transmission power determining device is used to determine the transmission power of the CC of the UE according to the initial transmission power, the power allocation priority coefficients among the various types of channels, and the power allocation priority coefficients within multiple Bs.

Wherein, the device further includes: a closed-loop parameter adjustment device, configured to receive a closed-loop power control instruction transmitted by the base station, and adjust the transmit power of the CC of the UE according to the closed-loop power control instruction.

The present invention also provides a carrier aggregation system, including: a base station, configured to send open-loop power control parameters and closed-loop power parameters; and the above-mentioned user equipment.

(3) Beneficial effects

The present invention performs effective power control for user equipment in a CA system, reduces the complexity of the user equipment, and optimizes the reliability of user equipment control information, the performance of data channels and the overall performance of the system.

Description of drawings

FIG. 1 is a schematic diagram of a carrier aggregation application scenario according to an embodiment of the present invention;

Fig. 2 is a flowchart of the power control method of the present invention;

FIG. 3 is a flowchart of a power control method according to Embodiment 1 of the present invention;

FIG. 4 is a flowchart of a power control method according to Embodiment 2 of the present invention;

FIG. 5 is a flowchart of a power control method according to Embodiment 3 of the present invention;

FIG. 6 is a schematic structural diagram of a user equipment according to Embodiment 1 of the present invention;

FIG. 7 is a schematic structural diagram of a user equipment according to Embodiment 2 of the present invention;

FIG. 8 is a schematic structural diagram of a carrier aggregation system according to an embodiment of the present invention.

Detailed ways

The specific implementation manners of the present invention will be described in further detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

Fig. 1 is a schematic diagram of a carrier aggregation application scenario 100 according to an embodiment of the present invention. In the application scenario 100 , a base station 104 , a UE 102 , and CCs 106 , 108 , and 110 are included.

The present invention divides the simultaneous transmission scenarios of multiple data channels with limited power under carrier aggregation into two types: PUSCH w/o UCI and multiple PUSCHs (hereinafter referred to as PUSCH without UCI).

As shown in Figure 2, based on the above two scenarios, the method includes the following steps:

S1. The UE receives the open-loop power control parameters of the CC sent by the base station;

S2. The UE obtains the path loss value between each CC and the base station;

S3. The UE determines the initial transmit power of each CC of the UE according to the open-loop power control parameter and the path loss value;

S4. If it is determined that the initial transmit power needs to be adjusted, the UE sets the power allocation priority coefficients among various channels used when sending data to the base station;

S5. The UE sets the multiple B internal power allocation priority coefficients sent to the base station;

S6. The UE determines the transmit power of the UE's CC according to the initial transmit power, the power allocation priority coefficients among the various types of channels, and the power allocation priority coefficients within multiple Bs.

Examples of the present invention are described below.

In the application scenario 100, the UE 102 can simultaneously transmit various channels on multiple CCs, where UCI (uplink control information) is only transmitted on one UL (uplink, uplink) CC. As shown in FIG. 1 , take UE 102 simultaneously transmitting three co-band continuous CCs 106 , 108 and 110 as an example, wherein CC 106 transmits PUSCH with UCI, while CCs 108 and 110 transmit only PUSCH.

The CC parameters referred to below may also be referred to as CC-specific (CC-specific) parameters.

According to the embodiment of the present invention, in the same-band continuous CA scenario, the initial power control scheme of UE102 can be expressed as:

P _{CC_j} =min{P _{max_j} ,10logM _j +P _{0_j} +α _j PL _j +Δ _{MCS_j} +f(Δ _{i_j} )},j=1,2,3(1)

Among them, P _{CC_j} is the initial transmission power of the jth CC of the UE102, P _{max_j} is the maximum transmission power of the CC, M _j is the number of uplink RBs (resource blocks, resource blocks) allocated to the jth CC of the UE102; P _{0_j} is Parameters of the jth CC of the base station 104 or UE102 (including target SINR, interference level, etc.); α _j is the path loss compensation coefficient; PL _j is the path loss of the jth CC of the UE102; Δ _{MCS_j} is determined by RRC (radio resource control, Parameters for a specific MCS (modulation and coding scheme, modulation and coding scheme) specified by the radio resource control layer; _{Δi_j} is the closed-loop correction coefficient of the transmit power of the base station 104 and the jth CC of the UE 102 .

FIG. 3 is a flowchart of a power control method 200 according to Embodiment 1 of the present invention.

In step 202, the user equipment receives CC open-loop power control parameters sent by the base station.

In step 204, the user equipment obtains the path loss value of the CC between itself and the base station through the RSRP measurement of the CC.

In step 206, the user equipment determines the initial transmit power of each CC of the user equipment according to the path loss value and the open-loop power control parameter.

In step 208, the user equipment counts the sum of the initial transmission powers of the three CCs, and judges whether the value exceeds the maximum transmission power P _max of the user equipment.

In step 210, if step 208 returns a negative result, it means that the power of the user equipment is not limited, and the initial transmission power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment sets the PUSCH priority coefficient β with UCI to 0, which ensures the reliability of UCI. And adjust the power P _{CC_j} (β) according to the following formula:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\frac{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}}{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 2</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 3</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 4</span>}<span\; class="notranslate">\; )</span>$

Where P _{CC_j} is the initial transmit power of the jth CC of the UE. P _{CC_j} (β) is the adjusted power of the jth CC when the UCI PUSCH priority coefficient β takes a certain value. P _MAX is the maximum transmit power of the UE. (P _{CC_2} +P _{CC_3} )-(P _max -P _{CC_1} (β)) is the sum of the reductions required for the power of the second CC and the third CC after the power adjustment of the first CC, that is, more than part. From formulas (3) and (4), it can be seen that the power of the second CC is cut by the same amount as that of the third CC.

In step 212, the user equipment determines whether the adjusted power of each CC is greater than or equal to zero.

In step 214, if step 212 returns an affirmative result, the user equipment may transmit according to the adjusted power obtained in step 210. Otherwise, the user equipment turns off the PUSCH channel whose adjusted power is less than 0. And re-enter step 210 until the power of all CCs is greater than or equal to zero, and the sum does not exceed the maximum transmission power value of the user equipment.

FIG. 4 is a flowchart of a power control method 300 according to Embodiment 2 of the present invention. The description of FIG. 3 incorporates the application scenario 100 of FIG. 1 .

In step 302, the user equipment receives open-loop power control parameters sent by the base station. For example, UE 102 may receive CC-specific open-loop power control parameters sent by base station 104 . The open-loop power control parameters include the path loss compensation coefficient α _j , the parameter reflecting the interference level of the base station 104 (which can be characterized by the target SINR at the receiving end) P _{0_j} , and the path loss deviation caused only by the different frequencies between the PCC and all SCCs. Shift value Δ _{PL_j} . For example, CC106 that transmits control information here is the main CC, and when the SCC and PCC are in the same frequency band, the path loss offset value of the jth CC is Δ _{PL_j} = 0, and when they are not in the same frequency band, Δ _{PL_j} is not zero.

In step 304, the user equipment performs RSRP measurement on the primary CC to obtain the path loss value PL _{j_PCC} between the CC of the user equipment and the base station, and then uses the SCC-specific Δ _{PL_j} to obtain PL _j = PL _{j_PCC} + Δ _{PL_j} .

In step 306, the user equipment determines the CC initial transmission power of the user equipment according to the path loss value and the open-loop power control parameter. For example, UE102 can determine an initial value of the CC-specific uplink transmit power of UE102 according to the path loss value PL _j obtained in step 304 and the open-loop power control parameters α _j and P _{0_j} obtained in step 302:

P _{CC_j} =min{P _{max_j} ,10logM _j +P _{0_j} +α _j PL _j +Δ _{MCS_j} },j=1,2,3

In step 308, the user equipment receives the closed-loop power control instruction transmitted by the base station. For example, the serving cell base station 106 will send a closed-loop power control instruction according to real-time conditions, which is represented as f(Δ _{i_j} ) in power control. The UE 102 receives the closed-loop power control command f(Δ _{i_j} ) transmitted by the base station 106 .

In step 310, the user equipment adjusts the transmit power of the user equipment according to the closed-loop power control instruction. For example, UE102 takes f(Δ _{i_j} ) factor into account according to the obtained closed-loop power control instruction, and adjusts P _{CC_j} , so as to obtain the transmit power of UE102 in formula (1).

In step 312, the user equipment counts the sum of the initial transmission powers of the three CCs, and judges whether the value exceeds the maximum transmission power P _max of the user equipment.

In step 314, if step 312 returns a negative result, the power of the user equipment is not limited, and the initial transmission power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment sets the PUSCH priority coefficient β with UCI to 0, and adjusts the power P _{CC_j} (β) according to the following formula:

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\frac{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}}{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 5</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 6</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}}<span\; class="notranslate">\; \&times;</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; \&alpha;</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}{\mathrm{<span\; class="notranslate">\; \&Delta;</span>}}_{\mathrm{<span\; class="notranslate">\; PL</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 7</span>}<span\; class="notranslate">\; )</span>$

α _j Δ _{PL_j} represents the path loss power compensation value between the jth CC and the base station. Formulas (6) and (7) are reduced proportionally according to the power allocation after subtracting the frequency-related path loss component (such as α ₃ Δ _{PL_3} ) from the initial transmit power.

In step 316, the user equipment determines whether the adjusted power of each CC is less than zero.

In step 318, if step 316 returns an affirmative result, the user equipment may transmit according to the adjusted power obtained in step 314. Otherwise, the user equipment turns off the PUSCH channel whose adjusted power is less than 0. And re-enter step 314 until the power of all CCs is greater than or equal to zero, and the sum does not exceed the maximum transmission power value of the user equipment.

Method 300 defines the path loss value of the secondary CC as the sum of the path loss value of the PCC (primary CC) (between the base station and the base station) of the user equipment and the path loss offset value of the secondary CC, which reduces the number of PSRPs and reduces the The complexity of the user device. Meanwhile, for the PUSCH channel, the priority of the PUSCH increases as the initially calculated allocated power increases. Because the transmit power in formula (1) is directly related to the MCS and the number of RBs, the above principle reflects that the PUSCH with high MCS has a higher priority. Under the same MCS, the PUSCH with more RBs has a relatively higher Priority principle, thus effectively reducing the throughput loss caused by power limitation to user equipment.

FIG. 5 is a flowchart of a power control method 400 according to Embodiment 3 of the present invention. The description of FIG. 5 combines the application scenario 100 of FIG. 1 , but is not limited to the form of the application scenario 100 .

In step 402, the user equipment receives open-loop power control parameters sent by the base station. For example, the UE 102 may receive the CC open-loop power control parameters sent by the base station 104 . The open-loop power control parameters include the path loss compensation coefficient α _j , the parameter P _{0_j} reflecting the interference level of the base station 104 (characterized by the target SINR at the receiving end), and the path loss offset value caused only by the different frequencies between the PCC and all SCCs . For example, the CC 106 transmitting the control information here is the main CC. When the SCC and the PCC are in the same frequency band, the path loss offset value of the jth CC is Δ _{PL_j} = 0, and when they are not in the same frequency band, Δ _{PL_j} is not zero.

In step 404, the user equipment performs RSRP measurement on the primary CC to obtain the path loss value PL _{j_PCC} between the user equipment and the CC of the cell, and then uses the SCC-specific Δ _{PL_j} to obtain PL _j = PL _{j_PCC} + Δ _{PL_j} for each SCC .

In step 406, the user equipment determines the CC initial transmit power of the user equipment according to the path loss value and the open-loop power control parameter. For example, UE102 can determine an initial value of the CC-specific uplink transmit power of UE102 according to the path loss value PL _j obtained in step 404 and the open-loop power control parameters α _j and P _{0_j} obtained in step 402:

P _{CC_j} =min{P _{max_j} ,10logM _j +P _{0_j} +α _j PL _j +Δ _{MCS_j} },j=1,2,3

In step 408, the user equipment receives the closed-loop power control instruction transmitted by the base station. For example, the serving cell base station 106 will send a closed-loop power control instruction according to real-time conditions, which is represented as f(Δ _{i_j} ) in power control. The UE 102 receives the closed-loop power control command f(Δ _{i_j} ) transmitted by the base station 106 .

In step 410, the user equipment adjusts the transmit power of the user equipment according to the closed-loop power control instruction. For example, UE102 takes f(Δ _{i_j} ) factor into account according to the obtained closed-loop power control instruction, and adjusts P _{CC_j} , so as to obtain the transmit power of UE102 in formula (1).

In step 412, the user equipment receives a CC-specific CQI (channel quality index, channel quality indication) instruction transmitted by the base station.

In step 414, the user equipment acquires a CC-specific quantized SINR according to the CQI instruction.

In step 416, the user equipment counts the sum of the initial transmission powers of the three CCs, and judges whether the value exceeds the maximum transmission power P _max of the user equipment.

In step 418, if step 416 returns a negative result, the power of the user equipment is not limited, and the initial transmission power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment sets the PUSCH priority coefficient β with UCI to 0, and adjusts according to the following formula to obtain the power P _{CC_j} (β):

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; -</span>\frac{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}}{\underset{\mathrm{<span\; class="notranslate">\; j</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 1</span>}}{\overset{\mathrm{<span\; class="notranslate">\; 3</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; j</span>}}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; \&times;</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 8</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 9</span>}<span\; class="notranslate">\; )</span>$

${\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; =</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; -</span>\frac{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 3</span>}}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; max</span>}}<span\; class="notranslate">\; -</span>{\mathrm{<span\; class="notranslate">\; P</span>}}_{\mathrm{<span\; class="notranslate">\; CC</span>}<span\; class="notranslate">\; \_</span>\mathrm{<span\; class="notranslate">\; 1</span>}}<span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; \&beta;</span>}<span\; class="notranslate">\; =</span>\mathrm{<span\; class="notranslate">\; 0</span>}<span\; class="notranslate">\; )</span><span\; class="notranslate">\; )</span>}{{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; +</span>{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 3</span>}}}<span\; class="notranslate">\; \&times;</span>{\mathrm{<span\; class="notranslate">\; SINR</span>}}_{\mathrm{<span\; class="notranslate">\; 2</span>}}<span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; -</span><span\; class="notranslate">\; (</span>\mathrm{<span\; class="notranslate">\; 10</span>}<span\; class="notranslate">\; )</span>$

Formulas (9) and (10) are reduced proportionally according to the SINR of the second CC and the third CC (expressed as SINR _j , j=1, 2, 3).

In step 420, the UE determines whether the adjusted power of each CC is less than zero.

In step 422, if step 420 returns an affirmative result, the user equipment may transmit according to the adjusted power obtained in step 418. Otherwise, the user equipment turns off the PUSCH channel whose adjusted power is less than 0. And re-enter step 418, until the power of all CCs is greater than or equal to zero, and the sum does not exceed the maximum transmission power value of the user equipment.

Method 400 still only needs to perform one RARP measurement. When the user equipment aggregates CCs of different bands (multiple CCs are in different frequency bands), it needs to receive newly introduced signaling to obtain the path loss offset value. At the same time, the power priority coefficient β of the PUSCH with UCI is still 0. However, in a power-constrained scenario, for the PUSCH channel, the priority of the PUSCH increases as the SINR of the CC increases, which can more realistically reflect the specific uplink quality of each CC, and thus can be more effective Reduce the throughput loss caused by power limitation to user equipment.

FIG. 6 is a schematic structural diagram of a user equipment 500 according to Embodiment 1 of the present invention. The user equipment 500 includes a receiving unit 502 , a path loss acquiring unit 504 , an initial transmit power determining unit 506 , a power limited judging unit 508 , a power adjusting unit 510 , a power non-negative judging unit 512 , and a channel closing unit 514 .

The receiving means 502 is used for receiving the open-loop power control parameters sent by the base station.

The path loss obtaining means 504 is used to obtain the path loss value between the CC and the base station.

The initial transmit power determining unit 506 is configured to determine the CC-specific initial transmit power of the user equipment according to the path loss value and the open-loop power control parameters.

An inter-channel power allocation priority coefficient acquisition device (not shown), used to set the power allocation priority coefficients among various channels used when sending data to the base station;

An intra-channel power allocation priority coefficient acquisition device (not shown), used to set multiple B internal power allocation priority coefficients sent to the base station;

A transmit power determining device (not shown), configured to determine the transmit power of the CC of the UE according to the initial transmit power, the power allocation priority coefficients among the various types of channels, and the power allocation priority coefficients within multiple Bs ;

The power limitation judging means 508 is used for judging whether the sum of the initial transmit powers of all CCs exceeds the upper limit of the transmit power of the user equipment.

The power adjustment unit 510 is configured to adjust the transmission power of each channel so that the sum of the transmission powers of all CCs is within the transmission power range of the user equipment.

The power non-negative judging means 512 is used for judging whether the adjusted power of each CC is less than zero.

The channel closing means 514 is used to close the channel whose adjusted power is less than zero.

FIG. 7 is a schematic structural diagram of a user equipment 600 according to Embodiment 2 of the present invention. The user equipment 600 includes a receiving unit 602 , a path loss acquiring unit 604 , an initial transmit power determining unit 606 , a power limited judging unit 608 , a power adjusting unit 610 , a power non-negative judging unit 612 , and a channel closing unit 614 .

The receiving means 602 is used for receiving the open-loop power control parameters sent by the base station.

The path loss obtaining module 604 is used to obtain a CC-specific path loss value between the user equipment and the cell. The path loss obtaining device 604 further includes: a PCC path loss obtaining module 12 and an SCC path loss obtaining module 14 . The path loss acquisition module 12 is used to acquire the path loss value between the user equipment PCC and the cell. The SCC path loss acquisition module 14 is configured to select the path loss value between the user equipment PCC and the cell from the PCC path loss value and the SCC specific path loss offset value.

The initial transmission power determining unit 606 is configured to determine the CC-specific initial transmission power of the user equipment according to the path loss value, the open-loop power control parameter and the closed-loop power control parameter. The path loss acquisition device 606 further includes: an open-loop transmit power determination module 16 and a closed-loop parameter adjustment module 18 . The open-loop transmit power determining module 16 is configured to determine the specific open-loop initial transmit power of the user equipment CC according to the path loss value and the open-loop power control parameters. The closed-loop parameter adjustment module 18 is configured to receive the closed-loop power control instruction transmitted by the base station, and adjust the transmission power of the user equipment according to the closed-loop power control instruction.

An inter-channel power allocation priority coefficient acquisition device (not shown), used to set the power allocation priority coefficients among various channels used when sending data to the base station;

An intra-channel power allocation priority coefficient acquisition device (not shown), used to set multiple B internal power allocation priority coefficients sent to the base station;

A transmit power determining device (not shown), configured to determine the transmit power of the CC of the UE according to the initial transmit power, the power allocation priority coefficients among the various types of channels, and the power allocation priority coefficients within multiple Bs ;

The power limitation judging means 608 is used for judging whether the sum of the initial transmit powers of all CCs exceeds the upper limit of the transmit power of the user equipment.

The power adjustment unit 610 is configured to adjust the transmission power of each channel so that the sum of the transmission powers of all CCs is within the power capability range of the user equipment.

The power non-negative judging means 612 is used to judge whether the adjusted power of each CC is less than zero.

The channel closing means 614 is used to close the channel whose adjusted power is less than zero.

FIG. 8 is a schematic structural diagram of a carrier aggregation system 700 according to an embodiment of the present invention. The carrier aggregation system 700 includes a base station 702 and a user equipment 704 .

The base station 702 is configured to send open-loop and closed-loop power control parameters and CC priority coefficients. In one embodiment, the base station 702 may further include an open-loop parameter adjustment device 22 , a closed-loop parameter adjustment device 24 , a CC priority setting device 26 , and a sending device 28 . The open-loop parameter adjustment device 22 is used to change the path loss compensation coefficient and change the parameters reflecting the interference level of the base station. The compensation for changing the path loss compensation coefficient by the open-loop parameter adjustment device 22 may be Δα=0.1. The extent to which the open-loop parameter adjustment device 22 changes the parameter reflecting the interference level of the base station may be determined according to the average value of path losses of all user equipments in the cell covered by the base station. The closed-loop parameter adjustment device 24 is used to set parameters for fine-tuning the closed-loop power. The CC priority setting device 26 is used for quantizing the SINR value specific to the uplink CC. The sending unit 28 is configured to send the path loss compensation coefficient, the parameter reflecting the interference level of the base station, the fine-tuning parameter of the closed-loop power control, and the priority coefficient specific to the uplink CC to the user equipment.

The user equipment 704 is used to receive the open-loop power control parameters sent by the base station, obtain the CC-specific path loss value between the user equipment and the cell, obtain the CC-specific transmission power of the user equipment according to the path loss value and the open-loop power control parameter, and judge all CCs Whether the sum of the initial transmission power of CC exceeds the upper limit of the transmission power of the user equipment, adjust the transmission power of each channel so that the sum of the transmission power of all CCs is within the power capability range of the user equipment, determine and close the channel whose adjusted power is less than zero. The user equipment 704 includes a receiving unit 704.2, a path loss acquiring unit 704.4, an initial transmit power determining unit 704.6, a power limited judging unit 704.8, a power adjusting unit 704.10, a power non-negative judging unit 704.12 and a channel closing unit 704.14, wherein the path loss acquiring The device 704.4 includes a PCC path loss acquisition module 28 and an SCC path loss acquisition module 30; the initial transmission power determination device 704.6 includes an open-loop transmission power determination module 32 and a closed-loop parameter adjustment module 34; the power adjustment device 704.10 includes a priority coefficient acquisition module 36 ( It includes an inter-channel power allocation priority coefficient acquisition device, an intra-channel power allocation priority coefficient acquisition device) and a CC-specific power reduction module 38 .

The above embodiments of the present invention are only used to illustrate the present invention, but not to limit the present invention. Those of ordinary skill in the relevant technical fields can also make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, all equivalent technical solutions also belong to the category of the present invention, and the scope of patent protection of the present invention should be defined by the claims.

Claims (9)

1. ascending power control method, it is characterized in that, the scene that a plurality of data channels that have power limited under the carrier aggregation are transmitted simultaneously is divided into two kinds: a Physical Uplink Shared Channel A who has ascending control information UCI, and a plurality of Physical Uplink Shared Channel B that does not have ascending control information provides service for a user equipment (UE) simultaneously; Only a plurality of B among a plurality of carrier wave unit CC are simultaneously for a UE provides service, and based on above two kinds of scenes, UE sends multiple channel at a plurality of CC simultaneously, and ascending control information transmits at a CC, and this method may further comprise the steps:

S1, UE receive the open Loop Power control parameter of the CC that sends the base station;

S2, UE obtain the path loss values of its each CC and base station;

S3, UE determine the Initial Trans of each CC of UE according to described open Loop Power control parameter and path loss values;

S4, if judge to need adjust described Initial Trans, the power division priority factor of all kinds of interchannels that utilize when then UE sets and sends data to the base station;

S5, UE set the power division priority factor of a plurality of B inside that sends to the base station;

S6, UE determine the transmitting power of the CC of UE according to the power division priority factor of the power division priority factor of described Initial Trans, described all kinds of interchannels and a plurality of B inside;

Be specially if judge to need adjust described Initial Trans described in the step S4: judge whether that according to the Initial Trans sum of all CC needs adjust described Initial Trans, if the Initial Trans sum of all CC does not then need to adjust described Initial Trans less than the maximum transmission power of UE;

When UE transmits three simultaneously with being with continuous CC, one of them CC transmission has the PUSCH of UCI, when two other CC all only transmits PUSCH, the power division priority factor of all kinds of interchannels that utilize when then UE described in the step S4 sets to base station transmission data, be specially: the PUSCH priority factor β that has UCI is set to 0;

Then according to following formula described Initial Trans is adjusted:

$P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_1}-\frac{\underset{j=1}{\overset{3}{\mathrm{\&Sigma;}}}{P}_{\mathrm{CC}\_j}{-P}_{\max }}{\underset{j=1}{\overset{3}{\mathrm{\&Sigma;}}}{P}_{\mathrm{CC}\_j}}\&times;P_{\mathrm{CC}\_1}\&times;\mathrm{\&beta;}$

$P_{\mathrm{CC}\_2}\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_2}-\frac{(P_{\mathrm{CC}\_2}+P_{\mathrm{CC}\_3})-(P_{\max }-P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right))}{2}$

$P_{\mathrm{CC}\_3}=\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_3}-\frac{(P_{\mathrm{CC}\_2}+P_{\mathrm{CC}\_3})-(P_{\max }-P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right))}{2},$

Wherein, P _{CC_j}Be the Initial Trans of j the CC of UE, P _{CC_j}(β) for to get under certain definite value situation at the PUSCH of UCI priority factor β, the power after j CC adjusts, P _MAXMaximum transmission power for UE.

2. ascending power control method according to claim 1 is characterized in that, described open Loop Power control parameter comprises the path loss penalty coefficient and embodies the parameter of the interference level of described base station.

3. ascending power control method according to claim 1 is characterized in that, step S2 is specially:

UE carries out Reference Signal Received Power RSRP to each CC and measures, to obtain described path loss values; Perhaps

UE carries out RSRP to main CC and measures, to obtain the path loss values of main CC; And obtain the path loss deviant of time CC, the path loss deviant that the path loss values of main CC is added CC last time obtains the path loss values of time CC.

4. ascending power control method according to claim 1 is characterized in that, step S4 is specially: it is limit priority that UE sets the A that sends to the base station, and sets the priority of the B that sends to the base station.

5. ascending power control method according to claim 1 is characterized in that, step S5 is specially:

The priority that UE sets each B is identical; Perhaps

UE sets the priority of each B according to described Initial Trans; Perhaps

The priority of each B is set in the instruction that UE sends according to the base station.

6. ascending power control method according to claim 1 is characterized in that, also comprises step between step S3 and S4:

S301, UE receive the closed power control command of base station emission;

S302, UE adjust the Initial Trans of each CC of UE according to described closed power control command.

7. subscriber equipment, it is characterized in that, the scene that a plurality of data channels that have power limited under the carrier aggregation are transmitted simultaneously is divided into two kinds: a Physical Uplink Shared Channel A who has ascending control information UCI, and a plurality of Physical Uplink Shared Channel B that does not have ascending control information provides service for a user equipment (UE) simultaneously; Only a plurality of B among a plurality of carrier wave unit CC are simultaneously for a UE provides service, and described subscriber equipment is used for carrying out uplink power control based on above two kinds of scenes, and UE sends multiple channel at a plurality of CC simultaneously, and ascending control information transmits at a CC, comprising:

Receiving system is for the open Loop Power control parameter that receives the CC that sends the base station;

The path loss deriving means is used for obtaining the path loss values between each CC and base station;

Initial Trans is determined device, is used for determining according to described open Loop Power control parameter and path loss values the Initial Trans of the CC of UE;

Judgment means is used for Initial Trans sum according to all CC and judges whether that needs adjust described Initial Trans, if the Initial Trans sum of all CC does not then need to adjust described Initial Trans less than the maximum transmission power of UE;

Interchannel power division priority factor deriving means, the power division priority factor of all kinds of interchannels that utilize when being used for setting to base station transmission data;

The channel internal power distributes the priority factor deriving means, is used for setting the power division priority factor of a plurality of B inside that sends to the base station;

Transmitting power is determined device, is used for determining according to the power division priority factor of the power division priority factor of described Initial Trans, described all kinds of interchannels and a plurality of B inside the transmitting power of the CC of UE;

When UE transmits three simultaneously with being with continuous CC, one of them CC transmission has the PUSCH of UCI, when two other CC all only transmits PUSCH, the power division priority factor of all kinds of interchannels that utilize when then described interchannel power division priority factor deriving means is set to base station transmission data, be specially: the PUSCH priority factor β that has UCI is set to 0;

Then according to following formula described Initial Trans is adjusted:

$P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_1}-\frac{\underset{j=1}{\overset{3}{\mathrm{\&Sigma;}}}{P}_{\mathrm{CC}\_j}{-P}_{\max }}{\underset{j=1}{\overset{3}{\mathrm{\&Sigma;}}}{P}_{\mathrm{CC}\_j}}\&times;P_{\mathrm{CC}\_1}\&times;\mathrm{\&beta;}$

$P_{\mathrm{CC}\_2}\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_2}-\frac{(P_{\mathrm{CC}\_2}+P_{\mathrm{CC}\_3})-(P_{\max }-P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right))}{2}$

$P_{\mathrm{CC}\_3}=\left(\mathrm{\&beta;}\right)=P_{\mathrm{CC}\_3}-\frac{(P_{\mathrm{CC}\_2}+P_{\mathrm{CC}\_3})-(P_{\max }-P_{\mathrm{CC}\_1}\left(\mathrm{\&beta;}\right))}{2},$

Wherein, P _{CC_j}Be the Initial Trans of j the CC of UE, P _{CC_j}(β) for to get under certain definite value situation at the PUSCH of UCI priority factor β, the power after j CC adjusts, P _MAXMaximum transmission power for UE.

8. equipment according to claim 7 is characterized in that, described equipment also comprises: the closed loop parameter adjustment controls, be used for receiving the closed power control command that launch the base station, and according to described closed power control command the transmitting power of the CC of UE is adjusted.

9. a carrier aggregation system is characterized in that, comprising: the base station is used for sending open Loop Power control parameter and closed power parameter; With claim 7 or 8 described subscriber equipmenies.

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