WO2012088948A1 - Uplink power control method, user equipment, and carrier aggregation system - Google Patents

Abstract

Disclosed are an uplink power control method, user equipment and carrier aggregation system. The method comprises: a UE receiving an open loop power control parameter of a CC transmitted by a base station; the UE acquiring a path loss value between each CC thereof and the base station; the UE, according to the open loop power control parameter and the path loss value, determining initial transmission power of each CC of the UE; if it is determined that the initial transmission power needs to be adjusted, the UE setting power allocation priority coefficients of various channels used in data transmission to the base station; the UE setting power allocation priority coefficients inside multiple Bs transmitted to the base station; and the UE, according to the initial transmission power, the power allocation priority coefficients of various channels and the power allocation priority coefficients inside multiple Bs, determining transmission power of the CC of the UE. In the present invention, effective power control is performed on the user equipment in a CA system, so that the complexity of the user equipment is reduced, and the reliability of the control information of the user equipment, the performance of data channels as well as the overall system performance are optimized.

Description

 Instruction manual

 Title: Uplink Power Control Method, User Equipment, and Carrier Aggregation System

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

Background technique

 In the uplink of the wireless communication system, the transmission power of the UE (User Equipment) directly affects important indicators such as the performance of the cell edge and the spectrum efficiency of the system. In the LTE (Long Term Evolution) system of the UMTS (Universal Mobile Telecommunications System), the uplink transmit power is the path loss (Path Loss) of the radio link, the path loss compensation coefficient, and the target SINR at the receiving end. (Signal to Interference and Noise Ratio, signal interference noise ratio) and other factors determine, the base station can also dynamically adjust the UE's transmit power, and at the same time in the time domain orthogonal physical channels: PUCCH (Physical Uplink Control Channel, physical uplink The power control process of the control channel), PUSCH w/o UCI (Physical Uplink Shared 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 system uplink and downlink transmission rate, CA (Carrier Aggregation) transmission/reception technology is included in the framework of LTE-Advanced by the 3rd Generation Partnership Project (3GPP). In the LTE-Advanced CA scenario, the CC (Component Carrier) specific uplink power control scheme directly affects the performance of the CA UE and the overall system. Multiple LTE systems in the CA system transmit simultaneously, and each LTE system can be regarded as Is a CC. Therefore, in the CA scenario, it is an urgent need to develop an efficient uplink power control scheme suitable for multi-carrier systems.

Summary of the invention

 (1) Technical problems to be solved

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

 (2) Technical plan

To solve the above technical problem, the present invention provides an uplink power control method, which divides two scenarios in which multiple data channels with power limitation are simultaneously transmitted under carrier aggregation into two types: one with uplink control information. The physical uplink shared channel A and the plurality of physical uplink shared channels B without uplink control information simultaneously provide services for one user equipment UE; only a plurality of Bs of multiple carrier units CC provide services for one UE at the same time, Based on the foregoing two scenarios, the method includes the following steps: Sl, the UE receives an open loop power control parameter of a CC sent by a base station; S2, and acquires, by the UE, a path loss value of each CC and the base station;

S3. The UE determines, according to the open loop power control parameter and the path loss value, an initial transmit power of each CC of the UE. _S4 . If it is determined that the initial transmit power needs to be adjusted, the UE sets a data used when transmitting data to the base station. a power allocation priority coefficient between the various types of channels; S5, the UE sets a power allocation priority coefficient of the multiple Bs sent to the base station; S6, the UE according to the initial transmit power, the power between the various types of channels The priority coefficient and the power allocation priority coefficients of the plurality of Bs are determined to determine the transmit power of the UE's CC. The open loop power control parameter includes a path loss compensation coefficient and a parameter that reflects an interference level of the base station.

 Step S2 is specifically: the UE performs reference signal received power RSRP measurement on each CC to obtain the path loss value; or the UE performs RSRP measurement on the primary CC to obtain a path loss value of the primary CC; and acquires a secondary CC. The path loss offset value is obtained by adding the path loss value of the primary CC to the path loss offset value of the secondary CC to obtain the path loss value of the secondary CC.

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

 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. . The step S3 and S4 further includes the following steps: S301: The UE receives the closed loop power control command sent 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 command.

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

 The present invention further provides a user equipment, which is divided into two scenarios: a physical uplink shared channel A with uplink control information, and multiple without The physical uplink shared channel B with the uplink control information provides services for one user equipment UE at the same time. Only a plurality of Bs of the multiple carrier units CC provide services for one UE at the same time, and the user equipment is used to perform the service based on the above two scenarios. Uplink power control, including:

 a receiving device, configured to receive an open loop power control parameter of the CC sent by the base station;

 a path loss acquiring device, configured to acquire a path loss value between each CC and a base station;

An initial transmit power determining apparatus, configured to determine an initial transmit power of a CC of the UE according to the open loop power control parameter and a path loss value; An inter-channel power allocation priority coefficient obtaining means, configured to set a power allocation priority coefficient between various types of channels used when transmitting data to the base station;

 An intra-channel power allocation priority coefficient obtaining means, configured to set a power allocation priority coefficient of a plurality of B internal transmissions to the base station;

 The transmit power determining means is configured to determine a transmit power of the CC of the UE according to the initial transmit power, a power allocation priority coefficient between the various types of channels, and a plurality of B internal power allocation priority coefficients.

 The device further includes: a closed loop parameter adjustment device, configured to receive a closed loop power control command sent by the base station, and adjust a 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, comprising: a base station, configured to send an open loop power control parameter and a closed loop power parameter; and the foregoing user equipment.

 (3) Beneficial effects

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

DRAWINGS

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

 2 is a flow chart of a power control method of the present invention;

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

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

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

 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 description

 The specific embodiments of the present invention will be further described in detail below with reference to the drawings and embodiments. The following examples are intended to illustrate the invention but are not intended to limit the scope of the 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, 110 are included.

 The present invention divides the scenarios in which multiple data channels with power limitation are simultaneously transmitted under carrier aggregation into two types: PUSCH w/o UCI, multiple PUSCHs (hereinafter referred to as PUSCH without UCI).

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

 51. The UE receives an open loop power control parameter of the CC sent by the base station.

52. The UE obtains a path loss value of each CC and the base station. 53. The UE determines, according to the open loop power control parameter and the path loss value, an initial transmit power of each CC of the UE.

 54. If it is determined that the initial transmit power needs to be adjusted, the UE sets a power allocation priority coefficient between various types of channels used when transmitting data to the base station;

 55. The UE sets a power allocation priority coefficient of multiple Bs that are sent to the base station.

 The UE determines the transmit power of the CC of the UE according to the initial transmit power, the power allocation priority coefficient between the various types of channels, and the power allocation priority coefficients of multiple Bs.

 Embodiments of the invention are described below.

 In the application scenario 100, the UE 102 can simultaneously transmit multiple channels on multiple CCs, where UCI (uplink control information) is transmitted on only one UL (uplink) CC. As shown in Figure 1,

The UE 102 simultaneously transmits three co-band continuous CCs 106, 108, and 110, where CC 106 transmits

The PUSCH of the UCI, while the CCs 108 and 110 transmit only the PUSCH.

 The parameters of the CC referred to below may also be referred to as CC-specific parameters.

 According to an embodiment of the present invention, in the same-band continuous CA scenario, the initial power control scheme of the UE 102 can be expressed as:

c _c . = min { _max . JO log M . + ₀ . + a . L . + Δ _Μ „ . + (Δ _; . )} , ; = 1, 2, 3 ( 1 ) where P _CCJ is UE 102 The initial transmit power of the first CC, P j is the maximum transmit power of the CC, and Mj is the number of uplink RBs (resource blocks) allocated to the jth CC of the UE 102; the first CC of the base station 104 or the UE 102 Parameters (including target SINR, interference level, etc.); for path loss compensation coefficient; path loss for UE 102 first CC; _MCSJ is specified by RRC (radio resource control) layer for a specific MCS ( Modulation and coding scheme, parameters of the modulation coding scheme; is the transmit power closed-loop correction coefficient of the base station 104 and the first CC of the UE 102.

 3 is a flow chart of a power control method 200 in accordance with an embodiment of the present invention.

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

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

 In step 206, the user equipment determines an 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 transmit powers of the three CCs and determines whether the value exceeds the maximum transmit power of the user equipment.

In step 210, if step 208 returns a negative result, then the power of the user equipment is not limited, and the initial transmit power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment will The PUSCH priority coefficient with UCI is set to 0, which ensures the reliability of UCI. And adjust the power according to the following formula: yp -P

Pec β) = Pec i ~ ^L -, xPcc < (2)

∑Pcc_ _}

(P _rr +P _rr J-(P -P _rr ΛΒ))

P ( ) =P (3) p _ p (P _rr +P _rr J-(P -P _rr Λ \Β)")

~尸 2 其中 P_CCJ为 UE的第 个 CC的初始发射功率。 P_{CC j} (β)为在 UCI的 PUSCH 优先级系数 取某个定值情况下， 第 个 CC调整后的功率。 为 UE的最大 发射功率。 （Pccj+Pcc— -dx-PccjO^)为在第 1个 CC进行功率调整后， 第

~ Corpse 2 where P _CCJ is the initial transmit power of the first CC of the UE. P _{CC j} (β) is the power after the first CC adjustment when the PUSCH priority coefficient of UCI takes a certain value. The maximum transmit power for the UE. (Pccj+Pcc—-dx-PccjO^) is the power adjustment after the first CC

The sum of the reductions required for the power of the 2 CC and the 3rd CC, that is, the excess. From equations (3) and (4), it can be seen that the second CC has the same amount of power reduction as the third CC.

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

0

 In step 214, if step 212 returns a negative result, the user equipment can transmit according to the adjusted power derived in step 210. Otherwise, the user equipment sets the minimum CC transmit power to zero. 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 transmit power value of the user equipment.

 4 is a flow chart of a power control method 300 in accordance with a second embodiment of the present invention. The description of Figure 3 incorporates the application scenario of Figure 1 100

In step 302, the user equipment receives an open loop power control parameter sent by the base station. For example, UE 102 can receive CC-specific open loop power control parameters transmitted by base station 104. The open loop power control parameters include a parameter that the path loss compensation coefficient reflects the interference level of the base station 104 (which can be characterized by the target SINR of the receiving end) Poj, and a path loss offset value Δ _ρ caused by only different frequencies between the PCC and all SCCs. , _; For example, the CC 106 transmitting the control information here is the primary CC, and when the SCC and the PCC are in the same frequency band, the path loss offset value of the first CC is =G, and not in the same frequency band, U, Zero.

 In step 304, the user equipment performs RSRP measurement on the primary CC to obtain a path loss value between the CC and the base station of the user equipment, and then obtains each SCC by using the SCC.

PL = PL + Δ In step 306, the user equipment determines the CC initial transmit power of the user equipment based on the path loss value and the open loop power control parameter. For example, the UE 102 can determine an initial value of the CC-specific uplink transmit power of the UE 102 based on the path loss value PLj obtained in step 304 and the open loop power control parameters α / and P _0J obtained in step 302:

P _cc = j,101 _O gM _{J +J} P ₀ + WA _MCS j =1,2,3

In step 308, the user equipment receives a closed loop power control command transmitted by the base station. For example, the serving cell base station 106 sends the real-time closed loop power control commands in accordance with the situation, the reflected power control ί _(Δ, υ UE 102 the base station 106 receives the closed loop power control commands transmitted _ί (Δ ίυ

In step 310, the user equipment adjusts the transmit power of the user equipment according to the closed loop power control command. For example, the UE 102 takes the VIII factor into account according to the acquired closed loop power control instruction, and adjusts ⁵ to obtain the transmit power of the UE 102 in the equation (1).

 In step 312, the user equipment counts the sum of the initial transmit powers of the three CCs and determines whether the value exceeds the maximum transmit power 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 transmit power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment sets the PUSCH priority coefficient ^ with UCI to 0, and adjusts the power according to the following formula: c—P y p —p

P _cc — β = 0) = P _cc _ _x xPcc^ χ β (5)

_ _ (P _{cc 2} + _cc ) - ( _max - P _{cc l} (β = o)) ( ₆

PcC—, β—0) P _C c 7 7

P _CC _^ = 0) = P ―" _ . ~ x(P _{cc 2} -« ₂ A _{Pi 2} ) (7) represents the path loss power compensation value between the first CC and the base station. Equation (6), ( 7) is to subtract the path loss component related to the frequency (such as Δ _ρ , , ) according to the initial transmit power. The dosing is scaled down.

 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 a negative result, the user equipment may transmit according to the adjusted power derived in step 314. Otherwise, the user equipment sets the minimum CC transmit power to zero. 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 transmit power value of the user equipment.

 The 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 path loss offset value of the secondary CC of the user equipment, which reduces the number of PSRPs and reduces the number of times. The complexity of the user device. At the same time, for the PUSCH channel, the priority of the PUSCH increases as the initial calculated power increases. Because the transmit power in equation (1) is directly related to the number of MCS and RB, the above principle embodies that the PUSCH of the high MCS has a higher priority. In the case of the same MCS, the PUSCH with a large number of RBs has a relatively high priority. The priority principle effectively reduces the throughput loss caused by power limitation to user equipment.

 Figure 5 is a flow diagram of a power control method 400 in accordance with a third embodiment of the present invention. The description of FIG. 5 incorporates 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 the open loop power control parameter sent by the base station. For example, the UE 102 can receive the open loop power control parameters of the CC sent by the base station 104. The open loop power control parameters include a path loss compensation coefficient "j, a parameter P _0J that reflects the interference level of the base station 104 (characterized by the target SINR of the receiving end), and a path loss offset value caused by only different frequencies between the PCC and all SCCs. For example, where CC 106 transmitting control information is the primary CC, and SCC is in the same frequency band as PCC, the first

The path loss offset value of CC is = G, and ^{Δ is} not zero when not in the same frequency band. In step 404, the user equipment performs RSRP measurement on the primary CC to obtain a path loss value between the user equipment and the CC of the cell, and then obtains each SCC by using the 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, the UE 102 can determine an initial value of the CC-specific uplink transmit power of the UE 102 based on the path loss value PLj obtained in step 404 and the open loop power control parameters α / and P _0J obtained in step 402:

P _cc = min {P _{max ;} , 101og _; . + P ₀ + « _; PL _; . + A _{MCS ;} } , j = 1, 2, 3 In step 408, the user equipment receives the closed loop power control command transmitted by the base station. For example, small service The area base station 106 sends a closed loop power control command according to the real-time situation, which is embodied as ί ( Δ , _υ UE 102 receives the closed loop power control command transmitted by the base station 106 ί ( Δ _{ί υ}

 In step 410, the user equipment adjusts the transmit power of the user equipment according to the closed loop power control command. For example, the UE 102 takes the VIII factor into account according to the acquired closed-loop power control command, and adjusts to obtain the transmit power of the UE 102 in the equation (1). In step 412, the user equipment receives a CC-specific CQI (channel quality index) command 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 transmit powers of the three CCs and determines if the value exceeds the maximum transmit power ^{pTM 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 transmit power does not need to be adjusted. Otherwise, the user equipment performs power adjustment: the user equipment sets the PUSCH priority coefficient with UCI to 0, and adjusts according to the following formula to obtain power y.

 / CC _ j max

Pec ₁ (^ = 0) = P _CC χ Ρ _€ α Χ (8)

∑Pcc_ _{} n} = r 0\\) = (^CC 2 + corpse CC 3 ) - (^mx - corpse CC ΐ (β ~ ^)) c in

P _RR (o P _RR , X SINK (y)

- - SINR ₂ + SINR ₃

(P _rr + P _rr Λ - (Ρ - P _rr , (β = 0))

P _{cc 3} (β = 0) = Ρ _€€ 3 - ^cc - ^{3 )} ~ ~~ - χ SINR ₂ (10) c ^c - ^{3 cc} - ³ SINR ₂ + SINR ₃ formula ( 9 ), ( 10 ) is in accordance with SINR of the second CC and the third CC (expressed as SINR) j= l,

In step 420, the user equipment determines whether the adjusted power of each CC is less than 0.

 In step 422, if step 420 returns a negative result, the user equipment may transmit according to the adjusted power derived in step 418. Otherwise, the user equipment sets the minimum CC transmit power to zero. 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 transmit power value of the user equipment.

The method 400 still only needs to perform the RARP measurement. When the user equipment aggregates the heterogeneous CC (when multiple CCs are in different frequency bands), it needs to receive the newly introduced signaling to obtain the path loss offset value. The power priority coefficient of the PUSCH with UCI is still 0. However, in a power-constrained scenario, On the PUSCH channel, the priority of the PUSCH increases as the SINR of the CC increases, which can more effectively reflect the quality of each CC-specific uplink, thereby effectively reducing the power limitation to the user equipment. Loss of throughput.

 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 device 502, a path loss obtaining device 504 and an initial transmission power determining device 506, a power limitation determining device 508, a power adjusting device 510, a power non-negative determining device 512, and a channel closing device 514.

 The receiving device 502 is configured to receive an open loop power control parameter sent by the base station.

 The path loss obtaining means 504 is for acquiring a path loss value between the CC and the base station.

 The initial transmit power determining means 506 is operative to determine a CC specific initial transmit power of the user equipment based on the path loss value and the open loop power control parameter.

 An inter-channel power allocation priority coefficient obtaining means (not shown) for setting a power allocation priority coefficient between various types of channels used when transmitting data to the base station;

 An intra-channel power allocation priority coefficient obtaining means (not shown) for setting a plurality of B internal power allocation priority coefficients transmitted to the base station;

 a transmit power determining device (not shown), configured to determine a transmit power of a CC of the UE according to the initial transmit power, a power allocation priority coefficient between the various types of channels, and a power allocation priority coefficient of multiple Bs ;

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

 The power adjustment means 510 is adapted to adjust the transmit power of each channel such that the sum of the transmit powers of all CCs is within the transmit power range of the user equipment.

 The power non-negative judging means 512 is for judging whether or not the adjustment power of each CC appears to be less than zero.

 Channel off device 514 is used to turn off channels with adjusted power 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 device 602, a path loss obtaining device 604, an initial transmission power determining device 606, a power limitation determining device 608, a power adjusting device 610, a power non-negative determining unit 612, and a channel closing device 614.

 The receiving device 602 is configured to receive an open loop power control parameter sent by the base station.

The path loss obtaining means 604 is configured to acquire a CC specific path loss value between the user equipment and the cell. The path loss acquisition device 604 further includes: a PCC path loss acquisition module 12 and an SCC path loss acquisition module 14. The path loss obtaining module 12 is configured to obtain a path loss value between the user equipment PCC and the cell. The SCC path loss acquisition module 14 is configured to select a 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 transmit power determining means 606 is configured to determine a CC-specific initial transmit power of the user equipment based on 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 open loop initial transmit power specific to the user equipment CC based on the path loss value and the open loop power control parameter. The closed loop parameter adjustment module 18 is configured to receive a closed loop power control command transmitted by the base station, and adjust the transmit power of the user equipment according to the closed loop power control instruction.

 An inter-channel power allocation priority coefficient obtaining means (not shown) for setting a power allocation priority coefficient between various types of channels used when transmitting data to the base station;

 An intra-channel power allocation priority coefficient obtaining means (not shown) for setting a plurality of B internal power allocation priority coefficients transmitted to the base station;

 a transmit power determining device (not shown), configured to determine a transmit power of a CC of the UE according to the initial transmit power, a power allocation priority coefficient between the various types of channels, and a power allocation priority coefficient of multiple Bs ;

 The power limitation determining means 608 is configured to determine whether the sum of the initial transmission powers of all CCs exceeds the upper limit of the transmission power of the user equipment.

 The power adjustment means 610 is adapted to adjust the transmit power of each channel such that the sum of the transmit powers of all CCs is within the power capabilities of the user equipment.

 The power non-negative judging means 612 is for judging whether or not the adjustment power of each CC appears to be less than zero.

 Channel off device 614 is used to turn off channels with adjusted power less than zero.

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

The base station 702 is configured to transmit open and closed loop power control parameters and CC priority coefficients. In one embodiment, the base station 702 can also include an open loop parameter adjustment device 22, a closed loop parameter adjustment device 24, a CC priority setting device 26, and a transmitting device 28. The open loop parameter adjustment means 22 is for changing the path loss compensation coefficient and changing the parameters embodying the interference level of the base station. The compensation of the open loop parameter adjustment device 22 to change the path loss compensation coefficient may be Α = 0.1. The magnitude of the parameter that the open loop parameter adjustment device 22 changes to reflect the interference level of the base station may be determined according to the average of the path loss of all user equipments in the cell covered by the base station. The closed loop parameter adjustment means 24 is used to set parameters for closed loop power trimming. The CC priority setting means 26 is for quantifying the uplink CC-specific SINR value. The transmitting device 28 is configured to send the path loss compensation coefficient and the parameter embodying the base station interference level, the closed loop power control fine adjustment parameter, and the uplink CC specific priority coefficient to the user equipment. The user equipment 704 is configured to receive an open loop power control parameter sent by the base station, obtain a CC specific path loss value between the user equipment and the cell, and obtain a specific transmit power of the user equipment CC according to the path loss value and the open loop power control parameter, and determine all CCs. Whether the sum of the initial transmit power exceeds the upper limit of the transmit power of the user equipment, adjust the transmit power of each channel such that the sum of the transmit powers of all CCs is within the range of the power capability of the user equipment, and determine and turn off the channel whose adjusted power is less than zero. The user equipment 704 includes a receiving device 704.2, a path loss obtaining device 704.4, an initial transmit power determining device 704.6, a power limitation determining device 704.8, a power adjusting device 704.10, a power non-negative determining device 704.12, and a channel closing device 704.14, wherein path loss is obtained. The device 704.4 includes a PCC path loss acquisition module 28 and an SCC path loss acquisition module 30; the initial transmit power determining device 704.6 includes an open loop transmit 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 ( An inter-channel power allocation priority coefficient acquisition means, an intra-channel power allocation priority coefficient acquisition means, and a CC-specific power reduction module 38 are included.

 The above embodiments of the present invention are intended to be illustrative of the present invention, and are not to be construed as limiting the scope of the invention, and various modifications and changes can be made without departing from the spirit and scope of the invention. Therefore, all equivalent technical solutions are also within the scope of the invention, and the scope of the invention should be defined by the claims.

Claims

Claim An uplink power control method, which is characterized in that two scenarios in which a plurality of data channels having power limitation are simultaneously transmitted under carrier aggregation are divided into two types: a physical uplink shared channel A with uplink control information, and a plurality of The physical uplink shared channel B without the uplink control information provides services for one user equipment UE at the same time; only multiple Bs of multiple carrier units CC provide services for one UE at the same time. Based on the above two scenarios, the method includes The following steps:  51. The UE receives an open loop power control parameter of the CC sent by the base station.  52. The UE acquires a path loss value of each CC and the base station.  53. The UE determines, according to the open loop power control parameter and the path loss value, an initial transmit power of each CC of the UE.  54. If it is determined that the initial transmit power needs to be adjusted, the UE sets a power allocation priority coefficient between various types of channels used when transmitting data to the base station;  55. The UE sets a power allocation priority coefficient of multiple Bs that are sent to the base station. The UE determines the transmit power of the CC of the UE according to the initial transmit power, the power allocation priority coefficient between the various types of channels, and the power allocation priority coefficients of multiple Bs.  2. The uplink power control method according to claim 1, wherein the open loop power control parameter comprises a path loss compensation coefficient and a parameter embodying an interference level of the base station.  The uplink power control method according to claim 1, wherein the step S2 is specifically: The UE performs reference signal received power RSRP measurement for each CC to obtain the The uplink power control method according to claim 1, wherein the step S4 is specifically: the UE sets the A sent to the base station to be the highest priority, and sets the priority of the B sent to the base station.  The uplink power control method according to claim 1, wherein the step S5 is specifically:  The UE sets each B to have the same priority; 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.  The uplink power control method according to claim 1, wherein the step S3 and S4 further comprise the following steps:  S301: The UE receives a closed loop power control command sent by the base station.  S302: The UE adjusts an initial transmit power of each CC of the UE according to the closed loop power control instruction.  The uplink power control method according to any one of claims 1 to 5, wherein in step S4, it is determined whether the initial transmission power needs to be adjusted according to the sum of initial transmission powers of all CCs.  A user equipment, which is characterized in that two scenarios in which a plurality of data channels having power limitation are simultaneously transmitted under carrier aggregation are divided into two types: a physical uplink shared channel A with uplink control information, and multiple The physical uplink shared channel B with the uplink control information provides services for one user equipment UE at the same time; only a plurality of Bs of multiple carrier units CC provide services for one UE at the same time, and the user equipment is used for the above two scenarios. Perform uplink power control, including:  a receiving device, configured to receive an open loop power control parameter of a CC sent by the base station; a path loss acquiring device, configured to acquire a path loss value between each CC and the base station; and an initial transmit power determining device, configured to use the open loop power according to the The control parameter and the path loss value determine an initial transmit power of the CC of the UE; Inter-channel power allocation priority coefficient obtaining means for setting data transmission to a base station The power allocation priority coefficient between the various channels utilized;  An intra-channel power allocation priority coefficient obtaining means, configured to set a plurality of B internal power allocation priority coefficients transmitted to the base station;  The transmit power determining means is configured to determine a transmit power of the CC of the UE according to the initial transmit power, a power allocation priority coefficient between the various types of channels, and a plurality of B internal power allocation priority coefficients.  The device according to claim 8, wherein the device further comprises: a closed loop parameter adjustment device, configured to receive a closed loop power control command sent by the base station, and transmit the CC of the UE according to the closed loop power control instruction. The power is adjusted.  A carrier aggregation system, comprising: a base station, configured to send an open loop power control parameter and a closed loop power parameter; and the user equipment according to claim 7 or 8.