CN101715207B

CN101715207B - Method for measuring power headroom, method for reporting power headroom and terminal

Info

Publication number: CN101715207B
Application number: CN200910212081.0A
Authority: CN
Inventors: 朱鹏; 郝鹏; 喻斌; 王瑜新
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2009-11-04
Filing date: 2009-11-04
Publication date: 2014-12-31
Anticipated expiration: 2029-11-04
Also published as: CN101715207A; WO2010149103A1

Abstract

The invention provides a method for measuring power headroom, which comprises the following steps that: when a user terminal sends an uplink physical channel on a subframe i and a component carrier group j, the user terminal measures the power headroom on the subframe i and the component carrier group j, wherein the uplink physical channel is a physical uplink shared channel (PUSCH) and/or a physical uplink control channel (PUCCH); and the component carrier group j contains one or more component carriers. The invention also provides a method for reporting the power headroom, which comprises the following steps that: after the user terminal measures the power headroom, the user terminal reports the power headroom to a base station, and also indicates the component carrier or component carrier group that the reported power headroom belongs to during the reporting. The invention also provides a terminal. The methods and the terminal realize the measurement and report of the power headroom in a carrier polymerization system.

Description

Method and terminal for measuring and reporting power headroom

Technical Field

The present invention relates to the field of mobile communications, and in particular, to a method and a terminal for measuring and reporting a power headroom.

Background

In a 3GPP LTE (The 3rd Generation Partnership Project Long term evolution), uplink power control (uplink power control, abbreviated as uplink power control or power control) is used to control The transmission power of an uplink physical channel (uplink physical channel) to compensate for The path loss and shadowing of The channel and suppress inter-cell interference. The Uplink Physical Channel controlled by the Uplink power control includes a Physical Uplink Shared Channel (PUSCH), a Physical Uplink Control Channel (PUCCH), and a Sounding Reference Signal (SRS). The LTE uplink power control adopts a control mode combining open loop (open loop) and closed loop (closed loop).

In the LTE system, the transmission power of PUSCH on a subframe (subframe) i of a User Equipment (UE) is defined as

P_PUSCH(i)＝min{P_CMAX，10log₁₀(M_PUSCH(i))+P_{O_PUSCH}(j)+α(j)·PL+Δ_TF(i)+f(i)}[dBm]

Wherein,

P_CMAXis the maximum transmit power (the configured UE transmitted power), P, configured by the UE_CMAX＝min{P_EMAX，P_UMAXIn which P is_EMAXIs the maximum allowed power (P) configured by the system_UMAXIs the maximum UE power (the maximum UE power) determined by the UE power class;

P＇_PUSCH(i)＝10log₁₀(M_PUSCH(i))+P_{O_PUSCH}(j)+α(j)·PL+Δ_TF(i) + f (i) is the PUSCH transmission power estimated by the UE according to the open-loop and closed-loop power control commands of the base station, the path loss estimation and the number of the resource blocks of the PUSCH scheduled on the subframe i;

M_PUSCH(i) is the transmission bandwidth of the PUSCH in subframe i, expressed in the number of Resource Blocks (RBs);

P_{O_PUSCH}(j) is an open loop power control parameter, is a cell specific quantity P_{O_NOMINAL_PUSCH}(j) And a UE specific (UE specific) quantity P_{O_UE_PUSCH}(j) The sum of (1); wherein j ═ 0 corresponds to PUSCH transmission by semi-persistent scheduling (semi-persistent scheduled), j ═ 1 corresponds to PUSCH transmission by dynamic scheduling (dynamic scheduled), and j ═ 2 corresponds to PUSCH transmission by random access response scheduling;

α is a cell-specific path loss compensation factor, and when j is 0 or 1, α (j) is ∈ {0, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9, 1}, and when j is 2, α (j) is 1. Alpha is 1 for complete path loss compensation, and alpha is less than 1 for partial path loss compensation;

PL is the downlink pathloss estimate (the downlink pathloss estimate) measured and calculated at the UE side;

Δ_TF(i) is a power offset related to Modulation Coding Scheme (MCS);

f (i) is the current PUSCH power control adjustment state. According to the configuration of the high-level parameters, when the accumulated value is controlled, f (i) is f (i-1) + delta_PUSCH(i-K_PUSCH) When the absolute value is power controlled, f (i) is delta_PUSCH(i-K_PUSCH)。δ_PUSCHIs a UE-specific closed loop correction value, also known as a transmit power control command (TPC command).

In the LTE system, the transmission power of PUCCH of UE on subframe i is defined as

P_PUCCH(i)＝min{P_CMAX，P_{O_PUCCH}+PL+h(n_CQI，n_HARQ)+Δ_{F_PUCCH}(F)+g(i)}[dBm]

Wherein,

P_CMAXthe definition of (1) is as before;

P＇_PUCCH(i)＝P_{O_PUCCH}+PL+h(n_CQI，n_HARQ)+Δ_{F_PUCCH}(F) + g (i) is the transmission power of the PUCCH estimated by the UE according to the open-loop and closed-loop power control commands, the path loss estimation and the PUCCH format scheduled on the subframe i;

P_{O_PUCCH}is an open loop power control parameter, is a cell specific quantity P_{O_NOMINAL_PUCCH}And one UE-specific quantity P_{O_UE_PUCCH}The sum of (1);

Δ_{F_PUCCH}(F) is a power offset associated with PUCCH format F (PUCCH format (F)), configured by higher layers;

h (n) is a value based on the PUCCH format F, where n_CQINumber of information bits, n, for CQI_HARQThe number of bits for HARQ;

g (i) is the current PUCCH power control adjustment state,。δ_PUCCHis a UE-specific closed loop correction value, also known as the transmit power control command (TPCcommand).

It should be noted that in the LTE system, in order to maintain the single carrier characteristic of the uplink signal, the PUSCH and the PUCCH cannot be transmitted simultaneously for the same UE.

In order to enable the base station to know whether each UE is Power limited, a proper transmit Power control command is indicated to the UE, a proper modulation and coding scheme and bandwidth are scheduled to the UE, and the UE needs to measure its own Power Headroom (PH) and report it to the base station. In the LTE system, the power headroom of a certain UE on subframe i is defined as:

PH(i)＝P_CMAX-{10log₁₀(M_PUSCH(i))+P_{O_PUSCH}(j)+α(j)·PL+Δ_TF(i)+f(i)}[dB]

i.e. the difference between the maximum UE-configured transmit power and the UE estimated transmit power of the PUSCH. Calculating the measured power headroom [ 40; quantization in the range of-23 ] dB, taking the nearest integer value with 1dB as accuracy, the quantization relation is as shown in table 1, and then passed by the physical layer to the higher layers.

The Media Access Control Layer (MAC Layer) uses a 6bits index to represent the power headroom after rounding, and the mapping relationship is shown in table 1, where the 6bits index is still referred to as the power headroom.

The reporting of the Power Headroom (PHR) is triggered by an event. When the UE has new uplink transmission in the current subframe and event triggers Power headroom reporting, and the base station is enough to accommodate a Power headroom MAC Control Element (Power Headroom MAC Control Element) for the channel resource allocated to the uplink transmission of the UE according to a certain logical channel priority, the UE reports the 6bits Power headroom to the base station through the Power headroom MAC Control Element.

The structure of the power headroom MAC layer control unit is shown in fig. 1, and is 1 octet (octet), wherein the highest 2 bits are reserved bits (R) and set to '0'; the lower 6bits are reported Power Headroom (PH).

It should be noted that in the LTE system, the power headroom is calculated only for the subframe in which the PUSCH is transmitted.

TABLE 1 quantization and reporting mapping of power headroom

An LTE-Advanced system (LTE-a system for short) is a next-generation evolution system of the LTE system. As shown in fig. 2, the LTE-a system extends a transmission bandwidth by using a carrier aggregation (carrier aggregation) technique, and each aggregated carrier is referred to as a "component carrier". The multiple component carriers may be continuous or discontinuous, and may be located in the same frequency band (operating band) or in different frequency bands.

In the LTE-a system, a user equipment may transmit a PUSCH on one (uplink) component carrier, or may simultaneously transmit a PUSCH on multiple (uplink) component carriers; the PUCCH may be transmitted on one (uplink) component carrier, may be simultaneously transmitted on a plurality of (uplink) component carriers, or may be transmitted on one component carrier in a plurality of PUCCH channels.

In addition, in the research on the physical uplink control channel PUCCH of the LTE-a system, it is also proposed to simultaneously transmit PUSCH and PUCCH on one or more (uplink) component carriers.

Therefore, how to measure the power headroom in the LTE-a system becomes a problem to be solved urgently.

In addition, in the LTE-a system, how to report the power headroom of the ue, especially how to report the power headroom timely when there is no scheduled PUSCH on a certain (uplink) component carrier or the scheduled PUSCH cannot support the power headroom report, is also a problem to be solved urgently.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a method and a terminal for measuring and reporting a power headroom, and to provide a scheme for implementing measurement and reporting of a power headroom in a carrier aggregation system.

In order to solve the above technical problem, the present invention provides a method for measuring a power headroom, comprising: when a user terminal sends an uplink physical channel on a subframe i and a component carrier group j, the user terminal measures a power ascending space on the subframe i and the component carrier group j, the uplink physical channel is a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH), and the component carrier group j comprises one or more component carriers.

Further, the method may further have a characteristic that, when the user terminal transmits the PUSCH or the PUCCH in the subframe i, the component carrier group j, the user terminal uses a difference between the maximum transmission power configured in the component carrier group j and the transmission power of the PUSCH or the PUCCH estimated by the user terminal and transmitted in the subframe i, the component carrier group j as a power headroom measured by the user terminal in the subframe i, the component carrier group j.

Further, the method may further have a characteristic that, when the user terminal transmits the PUCCH or PUSCH on multiple component carriers within the subframe i, the component carrier group j, the transmission power of the PUCCH or PUSCH transmitted on the subframe i, the component carrier group j estimated by the user terminal is the sum of the transmission powers of the PUCCH or PUSCH transmitted on the multiple component carriers estimated by the user terminal.

Furthermore, the method may further have a characteristic that, when the user terminal transmits a plurality of PUCCHs on any one component carrier in the subframe i and the component carrier group j, the user terminal estimates the transmission power of each PUCCH transmitted on the component carrier for the component carrier, and the sum of the transmission powers of the PUCCHs transmitted on the component carrier is used as the transmission power of the PUCCH transmitted on the component carrier estimated by the user terminal.

Further, the method may further have the following characteristic that when the user terminal simultaneously transmits PUSCH and PUCCH in the subframe i and the component carrier group j, a power headroom measured by the user terminal in the subframe i and the component carrier group j is PH (i, j):

PH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i，j)

or is pH_PUCCH(i, j) and PH_PUSCH(i，j)：

PH_PUCCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)

PH_PUSCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i, j) or PH_PUSCH(i，j)＝P_CMAX(j)-P′_PUSCH(i，j)

Wherein, P'_PUSCH(i, j) is the estimated PUSCH transmit power on subframe i, component carrier group j, P 'of the user terminal'_PUCCH(i, j) estimated transmit power, P, of PUCCH on subframe i, component carrier group j for the user terminal_CMAX(j) And configuring the maximum transmitting power of the user terminal on the component carrier group j.

Further, the method may further have a feature that the maximum transmit power configured by the user equipment on the component carrier group j is not greater than the maximum allowed power configured by the system on the component carrier group j; and/or, the maximum transmitting power configured by the user terminal on the component carrier group j is not greater than the sum of the maximum allowed power configured by the system on each component carrier in the component carrier group j; and/or the sum of the maximum transmitting power configured by the user terminal on the component carrier group j and the maximum transmitting power configured by the user terminal on other component carrier groups is not more than the total maximum transmitting power of the user terminal; and/or the maximum transmission power configured by the user terminal on the component carrier group j is not greater than the maximum transmission power supported by the power amplifier shared by the component carrier group j at the user terminal.

Further, the method may further have a characteristic that the ue transmits the uplink physical channel on the subframe i and the component carrier group j, where the step of transmitting the PUSCH on one or more component carriers in the component carrier group j and/or transmitting one or more PUCCHs on one or more component carriers in the component carrier group j is performed on the subframe i.

Further, the method may further include that the component carrier group j includes all component carriers using the same power amplifier in the ue; or, the component carrier group j includes all component carriers that can be supported by the user equipment.

The invention also provides a reporting method of the power headroom, after the user terminal measures the power headroom, the power headroom is reported to the base station, and the component carrier or the component carrier group to which the reported power headroom belongs is also indicated during reporting.

Further, the method may further include reporting, by the ue, the power headroom through a power headroom mac control unit, where the power headroom mac control unit indicates a component carrier or a component carrier group to which the reported power headroom belongs by using an absolute index or a relative index of the component carrier or the component carrier group.

Further, the method may further have a feature that the ue indicates an absolute index or a relative index of a component carrier or a component carrier group to which the reported power headroom belongs using the highest M bits of the power headroom mac layer control element.

Further, the method may further have a feature that, if the system carrier aggregates N uplink component carriers or component carrier groups, or the current system schedules N uplink component carriers or component carrier groups for the user equipment, absolute indexes of the N uplink component carriers or component carrier groups are ordered as N-0, 1, N-1 in ascending or descending order according to component carrier center frequencies;

or, if the absolute index of the component carrier or the component carrier group carrying the currently reported power ascending space medium access control layer control unit is n₀The relative index is 0, and the relative index n' of each component carrier or component carrier group is (n-n)₀) mod N or N ═ N (N)₀-n)mod N。

Or, if the absolute index of the resident component carrier or the component carrier group to which the resident component carrier belongs of the user equipment is n₁The relative index is 0, and the relative index n' of each component carrier or component carrier group is (n-n)₁) mod N or N ═ N (N)₁-n)mod N。

Further, the method may further have a characteristic that the ue reports the power headroom on its camping component carrier;

or, the user terminal reports the power headroom on the current component carrier wave for sending the PUSCH; and simultaneously carrying the power ascending space of one or more component carrier groups on the component carrier for sending the PUSCH.

The invention also provides a terminal, which is used for measuring the power ascending space on the sub-frame i and the component carrier group j when the terminal sends the uplink physical channel on the sub-frame i and the component carrier group j, wherein the uplink physical channel is a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH).

Further, the terminal may further have a feature that, when the PUSCH or the PUCCH is transmitted on the subframe i, the component carrier group j, the terminal is configured to use a difference between a maximum transmission power configured on the component carrier group j and an estimated transmission power of the PUSCH or the PUCCH transmitted on the subframe i, the component carrier group j as a power headroom measured by the terminal on the subframe i, the component carrier group j.

Further, the terminal may further have a feature that, when the PUCCH or PUSCH is transmitted on a plurality of component carriers in the subframe i, the component carrier group j, the terminal is configured to use a sum of transmission powers of the PUCCH or PUSCH transmitted on the plurality of component carriers estimated by the terminal as the transmission power of the PUCCH or PUSCH transmitted on the subframe i, the component carrier group j estimated by the terminal.

Further, the terminal may be further configured to, when a plurality of PUCCHs are transmitted on any one component carrier in the subframe i and the component carrier group j, estimate transmission power of each PUCCH transmitted on the component carrier for the component carrier, and use a sum of the transmission power of each PUCCH transmitted on the component carrier as the transmission power of the PUCCH transmitted on the component carrier estimated by the terminal.

Further, the terminal may further have a characteristic that, when the PUSCH and the PUCCH are simultaneously transmitted on the subframe i and the component carrier group j, a power headroom measured on the subframe i and the component carrier group j is PH (i, j),

PH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i, j) is either PH_PUCCH(i, j) and PH_PUSCH(i，j)：

PH_PUCCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)

Wherein, P'_PUSCH(i, j) is the estimated transmit power of PUSCH on subframe i, component carrier group j, P 'by the terminal'_PUCCH(i, j) estimated transmission power, P, of PUCCH on subframe i, component carrier group j for the terminal_CMAX(j) And configuring the maximum transmitting power of the terminal on the component carrier group j.

The invention also provides a terminal, which is used for reporting the power headroom to a base station after measuring the power headroom, and indicating the component carrier or the component carrier group to which the reported power headroom belongs when reporting.

Further, the terminal may further have a characteristic that the terminal is configured to report the power headroom through a power headroom mac layer control unit, and in the power headroom mac layer control unit, the absolute index or the relative index of the component carrier or the component carrier group is used to indicate the component carrier or the component carrier group to which the reported power headroom belongs.

Further, the terminal may further have a feature that the terminal is configured to indicate an absolute index or a relative index of a component carrier or a component carrier group to which the reported power headroom belongs using a highest M bit of the power headroom mac layer control element.

Further, the terminal may further have a feature that the terminal is configured to report the power headroom on the camping component carrier; or reporting the power headroom on the current component carrier wave for sending the PUSCH; and simultaneously carrying the power ascending space of one or more component carrier groups on the component carrier for sending the PUSCH.

The method for measuring the power headroom solves the problem of measuring the power headroom in an LTE-A system adopting carrier aggregation, solves the problem of reporting the power headroom in the LTE-A system adopting carrier aggregation, can report the power headroom on a certain component carrier group on the component carriers of other component carrier groups, and can report the power headroom on the certain component carrier on the other component carriers, thereby improving the timeliness of reporting the power headroom.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:

fig. 1 is a schematic structural diagram of a power headroom MAC layer control unit of an LTE system;

fig. 2 is a schematic diagram of carrier aggregation in an LTE-a system.

Detailed Description

The method for measuring and reporting the power headroom comprises the following steps:

when a user terminal sends a PUSCH and/or a PUCCH in a subframe i and a component carrier group j, the user terminal measures a power headroom PH (i, j) in the subframe i and the component carrier group j, including the following cases:

1) user terminal sends PUSCH on subframe i and component carrier group j

When a user terminal transmits PUSCH on subframe i, component carrier group j, the user terminal measures power headroom PH (i, j) on subframe i, component carrier group j.

The user terminal sends the PUSCH on the subframe i and the component carrier group j, which means that the user terminal sends the PUSCH on one or more component carriers in the component carrier group j on the subframe i.

Suppose the user terminal estimates the transmission power of PUSCH on subframe i, component carrier group j is P'_PUSCH(i, j), and the maximum transmission power configured by the user terminal on the component carrier group j is P_CMAX(j) Then the power headroom of the UE on subframe i is

PH(i，j)＝P_CMAX(j)-P′_PUSCH(i，j)[dB]

Namely, the difference between the maximum transmission power configured by the user terminal on the component carrier group j and the transmission power of the PUSCH transmitted on the component carrier group j estimated by the user terminal.

Wherein, P'_PUSCHAnd (i, j) is the PUSCH transmission power estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the number of the resource blocks of the PUSCH scheduled on the subframe i and the component carrier group j, and the like.

In particular, PUSCH, P 'is transmitted to the user terminal on a plurality of component carriers within component carrier group j'_PUSCH(i, j) is the sum of the PUSCH transmit powers on multiple component carriers estimated by the user terminal. If the estimated PUSCH transmission power on each component carrier in the component carrier group j is P'_PUSCH(i, K) where K ∈ K is the number of each component carrier in the component carrier group j, then

<math> <mrow> <msubsup> <mi>P</mi> <mi>PUSCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>=</mo> <munder> <mi>Σ</mi> <mrow> <mi>k</mi> <mo>&Element;</mo> <mi>K</mi> </mrow> </munder> <msubsup> <mi>P</mi> <mi>PUSCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow> </math>

2) User terminal sends PUCCH on subframe i and component carrier group j

A user terminal sends PUCCH on a subframe i and a component carrier group j, and the user terminal measures power ascending space PH (i, j) on the subframe i and the component carrier group j.

The user terminal sends the PUCCH on the subframe i and the component carrier group j, which means that on the subframe i, the user terminal sends the PUCCH on one or more component carriers in the component carrier group j, and the user terminal sends a plurality of PUCCH channels on one or more component carriers in the component carrier group j.

Suppose the user terminal estimates the transmit power of the PUCCH on subframe i, component carrier group j to be P'_PUCCH(i, j), and the maximum transmission power configured by the user terminal on the component carrier group j is P_CMAX(j) Then the power headroom of the UE on subframe i is

PH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)[dB]

Namely, the difference between the maximum transmission power configured by the user terminal on the component carrier group j and the transmission power of the PUCCH sent by the user terminal on the subframe i and the component carrier group j.

Wherein, P'_PUCCHAnd (i, j) estimating the transmission power of the PUCCH by the user terminal according to the open-loop and closed-loop power control commands of the base station, path loss estimation, PUCCH formats scheduled on the subframe i and the component carrier group j, occupied resource size and the like.

In particular, user terminals are sent PUCCH on multiple component carriers within component carrier group j and/or multiple PUCCH channels, P'_PUCCH(i, j) is the sum of the transmission powers of the PUCCHs estimated by the user terminal.

If the estimated transmission power of the PUCCH on each component carrier in the component carrier group j is P'_PUCCH(i, K) where K ∈ K is the number of each component carrier in the component carrier group j, then

<math> <mrow> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>=</mo> <munder> <mi>Σ</mi> <mrow> <mi>k</mi> <mo>&Element;</mo> <mi>K</mi> </mrow> </munder> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow> </math>

If the estimated PUCCH transmission power on component carrier k is P'_PUCCH(i, k), transmitting a plurality of PUCCH channels on component carrier k, wherein the estimated transmission power of each PUCCH channel is P'_PUCCH(i, k, C), where C ∈ C is the number of each PUCCH on component carrier k, then

<math> <mrow> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>=</mo> <munder> <mi>Σ</mi> <mrow> <mi>c</mi> <mo>&Element;</mo> <mi>C</mi> </mrow> </munder> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>,</mo> <mi>c</mi> <mo>)</mo> </mrow> </mrow> </math>

That is, when a user terminal transmits multiple PUCCHs on any component carrier in the sub-frame i and the component carrier group j, the user terminal estimates the transmission power of each PUCCH transmitted on the component carrier for the component carrier, and the sum of the transmission powers of the PUCCHs transmitted on the component carrier is used as the transmission power of the uplink physical channel transmitted on the component carrier estimated by the user terminal.

3) User terminal simultaneously transmits PUSCH and PUCCH on subframe i and component carrier group j

Assuming that a user terminal simultaneously transmits PUSCH and PUCCH on a subframe i and a component carrier group j, the user terminal measures power headroom on the subframe i and the component carrier group j.

The user terminal simultaneously transmits the PUSCH and the PUCCH on the subframe i and the component carrier group j, which means that on the subframe i, the user terminal transmits the PUSCH on one or more component carriers in the component carrier group j, and transmits the PUCCH on one or more component carriers in the component carrier group j, and the method includes one or more of the following cases: a) the user terminal simultaneously transmits PUSCH and PUCCH on one or more component carriers within component carrier group j, b) the user terminal transmits PUSCH on one or more component carriers within component carrier group j and PUCCH on another one or more component carriers.

Suppose the user terminal estimates the transmission power of PUSCH on subframe i, component carrier group j is P'_PUSCH(i, j), the estimated transmission power of PUCCH is P'_PUCCH(i, j), and the maximum transmission power configured by the user terminal on the component carrier group j is P_CMAX(j) Then, the power headroom of the ue on subframe i is PH (i, j):

PH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i，j)[dB]

or is pH_PUCCH(i, j) and PH_PUSCH(i，j)

PH_PUCCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)[dB]

PH_PUSCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i，j)[dB]

Or is pH_PUCCH(i, j) and PH_PUSCH(i，j)

PH_PUCCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)[dB]

PH_PUSCH(i，j)＝P_CMAX(j)-P′_PUSCH(i，j)[dB]

I.e. the difference between the maximum transmission power configured by the user terminal on the component carrier group j and the transmission power of the PUSCH and/or PUCCH estimated by the user terminal and sent on the component carrier group j.

Wherein, P'_PUSCHAnd (i, j) is the PUSCH transmission power estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, the path loss estimation and the number of the resource blocks of the PUSCH scheduled on the subframe i and the component carrier group j.

P′_PUCCHAnd (i, j) estimating the transmission power of the PUCCH according to the open-loop and closed-loop power control commands of the base station, path loss estimation, PUCCH formats scheduled on the subframe i and the component carrier group j and the occupied resource size by the user terminal.

The component carrier group j refers to a group of component carriers consisting of one or more component carriers, and the component carriers can be used for sending uplink signals.

In particular, each component carrier group comprises only one component carrier.

In particular, the component carrier group comprises all component carriers using the same power amplifier PA at the user terminal.

In particular, the component carrier group comprises all component carriers that can be supported by the user terminal.

P_CMAX(j) Is the maximum transmit power configured by the user terminal on component carrier group j.

Maximum transmitting power P configured by user terminal on component carrier group j_CMAX(j) Limited by the maximum allowed power P configured by the system on component carrier group j_EMAX(j)，P_CMAX(j)≤P_EMAX(j) And/or the maximum allowed power configured by the system on each component carrier in the component carrier group j. If the maximum allowable power configured on each component carrier in the component carrier group j by the system is P_EMAX(k) Wherein K ∈ K is the number of each component carrier in the component carrier group j,then

If the total maximum transmitting power of the user terminal is P according to the power grade of the user terminal_UMAXThe sum of the maximum transmission powers allocated to the user terminal on each component carrier group is less than or equal to the total maximum transmission power of the user terminal, that is

Or,

maximum transmitting power P configured by user terminal on component carrier group j_CMAX(j) Limited by the maximum transmission power P supported by a power amplifier PA shared by the component carrier group j at the user terminal_PA(j) I.e. by

P_CMAX(j)≤P_PA(j)

Or the maximum transmission power P configured by the user terminal on the component carrier group j_CMAX(j) Limited by several parameters mentioned above

P_CMAX(j)＝min{P_EMAX(j)，P_PA(j)}

And/or

<math> <mrow> <msub> <mi>P</mi> <mi>CMAX</mi> </msub> <mrow> <mo>(</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>=</mo> <mi>min</mi> <mo>{</mo> <munder> <mi>Σ</mi> <mrow> <mi>k</mi> <mo>&Element;</mo> <mi>j</mi> </mrow> </munder> <msub> <mi>P</mi> <mi>EMAX</mi> </msub> <mrow> <mo>(</mo> <mi>k</mi> <mo>)</mo> </mrow> <mo>,</mo> <msub> <mi>P</mi> <mi>PA</mi> </msub> <mrow> <mo>(</mo> <mi>j</mi> <mo>)</mo> </mrow> <mo>}</mo> </mrow> </math>

And is

When reporting the power ascending space to the base station, the user terminal indicates the reported power ascending space as the power ascending space on which component carrier group. And the user terminal reports the power headroom through a power headroom MAC layer control unit.

The user terminal reports the power ascending space on the resident component carrier wave; or the user terminal reports the power headroom on the current component carrier wave for sending the PUSCH. The component carrier sending PUSCH simultaneously carries the power ascending space of one or more component carrier groups.

Further, when reporting the power headroom to the base station, the ue indicates, in the MAC layer control unit, an absolute index or a relative index of a component carrier group to which the reported power headroom belongs.

Further, the highest M bits in the power headroom MAC layer control unit are used to indicate an absolute index n of a component carrier group to which the reported power headroom belongs.

Further, if the ue is configured with N component carrier groups, or the base station schedules the ue to transmit uplink signals on the N component carrier groups at that time, the absolute index N of each component carrier group is ordered as 0, 1.

Or,

further, the highest M bits in the power headroom MAC layer control unit are used to indicate a relative index n' of a component carrier group to which the reported power headroom belongs.

Further, if the absolute index of the component carrier group to which the component carrier carrying the currently reported power headroom MAC layer control element belongs is n₀The relative index is 0, and the relative index n' of each component carrier group is (n-n)₀) mod N or N ═ N (N)₀-n)mod N；

Or, if the absolute index of the component carrier group to which the resident component carrier of the user terminal belongs is n₁The relative index is 0, and the relative index n' of each component carrier is (n-n)₁) mod N or N ═ N (N)₁-n)mod N。

Several specific examples of the number of component carriers included in a component carrier group will be described below.

Special example 1

And when each component carrier group only contains one component carrier, the user terminal measures the power ascending space on the component carrier contained in each component carrier group.

A) When a user terminal transmits PUSCH on subframe i, component carrier k, the user terminal measures power headroom PH (i, k) on subframe i, component carrier k.

Suppose the user terminal estimates the transmit power of PUSCH on subframe i, component carrier k is P'_PUSCH(i, k) and the maximum transmission power configured by the user terminal on the component carrier k is P_CMAX(k) Then the power headroom of the UE on subframe i, component carrier k is

PH(i，k)＝P_CMAX(k)-P′_PUSCH(i，k)[dB]

I.e. the difference between the maximum transmission power configured by the user equipment on the component carrier k and the transmission power of the PUSCH transmitted by the user equipment on the component carrier k.

Wherein, P'_PUSCHAnd (i, k) is the PUSCH transmission power estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the number of the resource blocks of the PUSCH scheduled on the subframe i and the component carrier k, and the like.

B) Assuming that a user terminal transmits PUCCH in subframe i and component carrier k, the user terminal measures power headroom PH (i, k) in subframe i and component carrier k.

Suppose that the user terminal estimates the transmit power of the PUCCH on subframe i, component carrier k to be P'_PUCCH(i, k) and the maximum transmission power configured by the user terminal on the component carrier k is P_CMAX(k) Then the power headroom of the UE on subframe i, component carrier k is

PH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

I.e. the difference between the maximum transmission power configured by the user equipment on the component carrier k and the transmission power of the PUCCH estimated by the user equipment and sent on the component carrier k.

Wherein, P'_PUCCHAnd (i, k) is the transmission power of the PUCCH estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the PUCCH format scheduled on the subframe i and the component carrier k, the occupied resource size and the like.

If a plurality of PUCCH channels are transmitted on the component carrier k, the estimated transmission power of each PUCCH channel of the user terminal is P'_PUCCH(i, k, C), where C ∈ C is the number of each PUCCH on component carrier k, then

C) Assuming that a user terminal simultaneously transmits PUSCH and PUCCH on the subframe i and the component carrier k, the user terminal measures power headroom on the subframe i and the component carrier k.

Suppose the user terminal estimates the transmit power of PUSCH on subframe i, component carrier k is P'_PUSCH(i, k), the estimated transmission power of PUCCH is P'_PUCCH(i, k) and the maximum transmission power configured by the user terminal on the component carrier k is P_CMAX(k) Then the power headroom of the UE on subframe i, component carrier k is

PH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)-P′_PUSCH(i，k)[dB]

Or

PH_PUCCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

PH_PUSCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)-P′_PUSCH(i，k)[dB]

Or

PH_PUCCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

PH_PUSCH(i，k)＝P_CMAX(k)-P′_PUSCH(i，k)[dB]

I.e. the difference between the maximum transmission power configured by the user terminal on the component carrier k and the transmission power of the PUSCH and/or PUCCH simultaneously transmitted on the component carrier k estimated by the user terminal.

P′_PUCCHAnd (i, k) is the transmission power of the PUCCH estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the PUCCH format scheduled on the subframe i and the component carrier k, the occupied resource size and the like.

In particular, P_CMAX(k) Is the maximum transmit power configured by the user terminal on component carrier k.

Maximum transmission power P configured by user terminal on component carrier k_CMAX(k) Limited by the maximum allowed power that the system configures on component carrier k. If the maximum allowed power of the system configured on the component carrier k is P_EMAX(k) Then, then

P_CMAX(k)≤P_EMAX(k)

If the total maximum transmitting power of the user terminal is P according to the power grade of the user terminal_UMAXThe sum of the maximum transmission power configured by the user terminal on each component carrier is less than or equal to the total maximum transmission power of the user terminal, that is

Or the maximum transmission power P configured on the component carrier k by the user terminal_CMAX(k) Limited by the maximum transmit power supported by the power amplifier PA used by the component carrier k at the user terminal. If the component carrier uses a power amplifier alone at the user terminalAn amplifier PA supporting a maximum transmission power P_PA(k) Then, then

P_CMAX(k)≤P_PA(k)

If the component carrier and other component carriers share one power amplifier PA in the user terminal, the maximum transmitting power supported by the power amplifier is P_PA(j) Then, then

Or the maximum transmitting power P configured on the component carrier k by the user terminal_CMAX(k) Limited by both, e.g.

P_CMAX(k)＝min{P_EMAX(k)，P_PA(k)}

And is

When reporting the power ascending space to the base station, the user terminal indicates the power ascending space on which component carrier the reported power ascending space is. And the user terminal reports the power headroom through a power headroom medium access control layer control unit.

Further, when reporting the power headroom to the base station, the ue indicates, in the power headroom MAC layer control unit, an absolute index or a relative index of a component carrier to which the reported power headroom belongs.

Further, the highest M bits in the power headroom MAC layer control unit are used to indicate an absolute index n or a relative index n' of a component carrier to which the reported power headroom belongs.

Further, if N (uplink) component carriers are aggregated by a system carrier, or the current system schedules the N (uplink) component carriers for transmitting uplink signals to the ue, the absolute indexes of the N (uplink) component carriers are ordered as N ═ 0, 1., N-1 in ascending or descending order according to the component carrier center frequency;

or, if the absolute index of the component carrier carrying the currently reported power headroom MAC layer control unit is n₀The relative index is 0, and the relative index n' of each component carrier is (n-n)₀) mod N or N ═ N (N)₀-n)mod N。

Or, if the absolute index of the resident component carrier of the user terminal is n₁The relative index is 0, and the relative index n' of each component carrier is (n-n)₁) mod N or N ═ N (N)₁-n)mod N。

The user terminal reports the power ascending space on the resident component carrier wave;

or, the user terminal reports the power headroom on the current component carrier wave for sending the PUSCH.

The component carrier transmitting PUSCH may simultaneously carry power headroom of one or more component carriers.

Special example 2

When the component carrier group includes all the component carriers that can be supported by the user terminal, the user terminal measures power headroom on all the component carriers that can be supported, that is, the user terminal measures power headroom on all the component carriers currently transmitting uplink signals.

A) Assuming that a certain user terminal transmits PUSCH on subframe i, the user terminal measures power headroom ph (i) on subframe i.

The user terminal sends the PUSCH on the subframe i, which means that the user terminal sends the PUSCH on one or more component carriers on the subframe i.

Suppose the user terminal estimates the transmission power of PUSCH on subframe i to be P'_PUSCH(i) And the maximum transmission power configured by the user terminal is P_CMAXThen the power headroom of the UE on subframe i is

PH(i)＝P_CMAX-P′_PUSCH(i)[dB]

I.e. the difference between the maximum transmit power configured by the user terminal and the transmit power of the PUSCH estimated by the user terminal.

Wherein, P'_PUSCH(i) The transmission power of the PUSCH is estimated by the user terminal according to the open-loop and closed-loop power control commands of the base station, path loss estimation, the number of resource blocks of the PUSCH scheduled on the subframe i and the like.

In particular, PUSCH, P 'is transmitted to the user terminal on multiple component carriers'_PUSCH(i) Is the sum of the PUSCH transmit powers on multiple component carriers estimated by the user terminal. If the estimated PUSCH transmitting power of the user terminal on each component carrier is P'_PUSCH(i, k), where k is the number of each component carrier, then

<math> <mrow> <msubsup> <mi>P</mi> <mi>PUSCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>)</mo> </mrow> <mo>=</mo> <munder> <mi>Σ</mi> <mi>k</mi> </munder> <msubsup> <mi>P</mi> <mi>PUSCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow> </math>

B) Assuming that a certain user terminal transmits PUCCH on subframe i, the user terminal measures power headroom ph (i) on subframe i.

The user terminal sends the PUCCH on the subframe i, which means that the user terminal sends the PUCCH on one or more component carriers on the subframe i, and includes that the user terminal sends a plurality of PUCCH channels on one or more component carriers.

Suppose the user terminal estimated transmit power of PUCCH on subframe i is P'_PUCCH(i) And the maximum transmission power configured by the user terminal is P_CMAXThen the power headroom of the UE on subframe i is

PH(i)＝P_CMAX-P′_PUCCH(i)[dB]

I.e. the difference between the maximum transmit power configured by the user terminal and the transmit power of the PUCCH estimated by the user terminal.

Wherein, P'_PUCCH(i) The user terminal estimates the transmission power of the PUCCH according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the PUCCH format scheduled on the subframe i, the occupied resource size and the like.

In particular, the user terminal is sent PUCCH on multiple component carriers and/or multiple PUCCH channels, P ', on one or more component carriers'_PUCCH(i) Is the sum of the transmit powers of the PUCCHs estimated by the user terminal.

If the estimated PUCCH transmission power on each component carrier is P'_PUCCH(i, k), where k is the number of each component carrier, then

<math> <mrow> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>)</mo> </mrow> <mo>=</mo> <munder> <mi>Σ</mi> <mi>k</mi> </munder> <msubsup> <mi>P</mi> <mi>PUCCH</mi> <mo>′</mo> </msubsup> <mrow> <mo>(</mo> <mi>i</mi> <mo>,</mo> <mi>k</mi> <mo>)</mo> </mrow> </mrow> </math>

C) Assuming that a certain user terminal simultaneously transmits PUSCH and PUCCH on subframe i, the user terminal measures power headroom ph (i) on subframe i.

The user terminal simultaneously transmits the PUSCH and the PUCCH on the subframe i, which means that the user terminal transmits the PUSCH on one or more component carriers and transmits the PUCCH on one or more component carriers on the subframe i, and the method includes one or more of the following cases: (1) the user terminal simultaneously transmits PUSCH and PUCCH on one or more component carriers; (2) the user terminal transmits PUSCH on one or more component carriers and transmits PUCCH on another one or more component carriers; 3) a user terminal transmits PUCCH on one or more component carriers, including transmitting multiple PUCCH channels on one or more component carriers.

Suppose the user terminal estimates the transmission power of PUSCH on subframe i to be P'_PUSCH(i) Estimated transmit power of PUCCH is P'_PUCCH(i) And the maximum transmission power configured by the user terminal is P_CMAXThen the power headroom of the UE on subframe i is

PH(i)＝P_CMAX-P′_PUCCH(i)-P′_PUSCH(i)[dB]

Or

PH_PUCCH(i)＝P_CMAX-P′_PUCCH(i)[dB]

PH_PUSCH(i)＝P_CMAX-P′_PUCCH(i)-P′_PUSCH(i)[dB]

Or

PH_PUCCH(i)＝P_CMAX-P′_PUCCH(i)[dB]

PH_PUSCH(i)＝P_CMAX-P′_PUSCH(i)[dB]

I.e. the difference between the maximum transmit power configured by the user terminal and the transmit power of the PUSCH and/or PUCCH estimated by the user terminal.

P′_PUCCH(i) The user terminal estimates the transmission power of the PUCCH according to the open-loop and closed-loop power control commands of the base station, the path loss estimation, the PUCCH format scheduled on the subframe i, the occupied resource size and the like.

In particular, P_CMAXIs the maximum transmit power configured by the user terminal.

Maximum transmitting power P configured by user terminal_CMAXLimited by the maximum allowable power P configured by the system for the user terminal_EMAXI.e. by

P_CMAX≤P_EMAX

Maximum transmitting power P configured by user terminal_CMAXLimited by the total maximum transmit power of the user terminal. If the total maximum transmitting power of the user terminal is P according to the power grade of the user terminal, the configuration of a power amplifier PA and the like_UMAXThen, then

P_CMAX≤P_UMAX

Alternatively, the maximum transmission power P configured by the user terminal_CMAXLimited to both:

P_CMAX＝min{P_EMAX，P_UMAX}

and the user terminal reports the power headroom through a power headroom medium access control layer control unit.

The user terminal reports the power ascending space on the resident component carrier wave; or, the user terminal reports the power headroom on the current component carrier wave for sending the PUSCH.

The component carrier transmitting the PUSCH may simultaneously carry one or more power headroom.

And the terminal is used for taking the difference between the maximum transmission power configured on the component carrier group j and the estimated transmission power of the PUSCH or PUCCH transmitted on the subframe i, the component carrier group j as the power headroom measured by the terminal on the subframe i, the component carrier group j when the PUSCH or PUCCH is transmitted on the subframe i, the component carrier group j.

When the terminal transmits the PUCCH or PUSCH on a plurality of component carriers in the subframe i, the component carrier group j, the sum of the transmission powers of the PUCCH or PUSCH transmitted on the plurality of component carriers estimated by the terminal is used as the transmission power of the PUCCH or PUSCH transmitted on the subframe i, the component carrier group j estimated by the terminal.

When a plurality of PUCCHs are transmitted on any component carrier in the subframe i and the component carrier group j, the terminal is used for estimating the transmission power of each PUCCH transmitted on the component carrier for the component carrier, and taking the sum of the transmission power of each PUCCH transmitted on the component carrier as the transmission power of the PUCCH transmitted on the component carrier estimated by the terminal.

Wherein, the terminal is configured to, when the PUSCH and the PUCCH are simultaneously transmitted on the subframe i and the component carrier group j, measure a power headroom of the subframe i and the component carrier group j as PH (i, j),

PH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)-P′_PUSCH(i，j)

or is pH_PUCCH(i, j) and PH_PUSCH(i，j)：

PH_PUCCH(i，j)＝P_CMAX(j)-P′_PUCCH(i，j)

The invention also provides a terminal, which is used for reporting the power headroom to a base station after measuring the power headroom according to the method of the invention, and indicating the component carrier or the component carrier group to which the reported power headroom belongs when reporting.

The terminal is configured to report the power headroom through a power headroom mac layer control unit, where in the power headroom mac layer control unit, an absolute index or a relative index of a component carrier or a component carrier group is used to indicate a component carrier or a component carrier group to which the reported power headroom belongs.

The terminal is configured to indicate, by using the highest M bits of the power headroom mac layer control element, an absolute index or a relative index of a component carrier or a component carrier group to which the reported power headroom belongs.

The terminal is configured to report a power headroom on a camping component carrier of the terminal; or reporting the power headroom on the current component carrier wave for sending the PUSCH; and simultaneously carrying the power ascending space of one or more component carrier groups on the component carrier for sending the PUSCH.

The present invention will be described in detail below with reference to examples and the accompanying drawings.

Example one

Suppose an LTE-a system, which operates in Frequency Division Duplex (FDD) mode, has two downlink component carriers D1 and D2, and two uplink component carriers U1 and U2. The U1 and the D1 are located in the same frequency band, and the U2 and the D2 are located in the other frequency band.

A user terminal supports the transmission of uplink signals on U1 and U2.

The user terminal measures the power headroom on component carriers U1 and U2, respectively.

Assuming that a user terminal transmits PUSCH on subframe i, component carrier U1, the user terminal measures power headroom PH (i, 1) on subframe i, component carrier U1.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U1 is P'_PUSCH(i, 1), and the maximum transmission power configured by the user terminal on component carrier U1 is P_CMAX(1) Then the power headroom of the ue on subframe i, component carrier U1, is

PH(i，1)＝P_CMAX(1)-P′_PUSCH(i，1)[dB]

Assuming that a user terminal transmits PUSCH on subframe i, component carrier U2, the user terminal measures power headroom PH (i, 2) on subframe i, component carrier U1.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U2 is P'_PUSCH(i, 2), and the maximum transmission power configured by the user terminal on component carrier U2 is P_CMAX(2) Then the power headroom of the ue on subframe i, component carrier U2, is

PH(i，2)＝P_CMAX(2)-P′_PUSCH(i，2)[dB]

Assuming that a certain user terminal simultaneously transmits PUSCH and PUCCH on subframe i, component carrier U2, the user terminal measures power headroom PH (i, 2) on subframe i, component carrier U2.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U2 is P'_PUSCH(i, 2), the estimated transmission power of PUCCH is P'_PUCCH(i, 2), and the maximum transmission power configured by the user terminal on component carrier U2 is P_CMAX(2) Then the power headroom of the ue on subframe i, component carrier U2, is

PH(i，2)＝P_CMAX(2)-P′_PUSCH(i，2)-P′_PUCCH(i，2)[dB]

Or

PH_PUCCH(i，2)＝P_CMAX(2)-P′_PUCCH(i，2)[dB]

PH_PUSCH(i，2)＝P_CMAX(2)-P′_PUCCH(i，2)-P′_PUSCH(i，2)[dB]

Or

PH_PUCCH(i，2)＝P_CMAX(2)-P′_PUCCH(i，2)[dB]

PH_PUSCH(i，2)＝P_CMAX(2)-P′_PUSCH(i，2)[dB]

P_CMAX(1) And P_CMAX(2) Maximum transmission power configured on component carriers U1 and U2 by the user terminal respectively, and meets the requirements

P_CMAX(1)＝min{P_EMAX(1)，P_PA(1)}

P_CMAX(2)＝min{P_EMAX(2)，P_PA(2)}

And is

P_CMAX(1)+P_CMAX(2)≤P_UMAX

Wherein P is_EMAX(1) And P_EMAX(2) Maximum allowed power configured for the system on component carriers U1 and U2, respectively; p_PA(1) And P_PA(2) Maximum transmit power supported by a Power Amplifier (PA) used at the user terminal for component carriers U1 and U2, respectively; p_UMAXThe total maximum transmit power for the user terminal.

When reporting the power headroom to the base station, the user terminal indicates which component carrier the reported power headroom is on.

When the user terminal sends a power headroom MAC layer control unit on a component carrier U1 (or U2) and reports the power headroom on the component carrier U1 and/or U2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 00 (absolute index of the component carrier U1) and 01 (absolute index of the component carrier U2), respectively.

Or,

when the ue sends a power headroom MAC layer control unit on a component carrier U1 and reports the power headroom on the component carrier U1 and/or U2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 00 (relative index of the component carrier U1) and 01 (relative index of the component carrier U2), respectively.

When the ue sends a power headroom MAC layer control unit on a component carrier U2 and reports the power headroom on the component carrier U1 and/or U2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 01 (relative index of the component carrier U1) and 00 (relative index of the component carrier U2), respectively.

Or,

assuming that the component carrier U2 is the camping component carrier of the ue, the ue sends a power headroom MAC layer control unit on the component carrier U2, and when reporting the power headroom on the component carrier U1 and/or U2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 01 (relative index of the component carrier U1) and 00 (relative index of the component carrier U2), respectively.

Example two

Assuming an LTE-a system operating in FDD mode, the system has four downlink component carriers D1, D2, D3 and D4, and four uplink component carriers U1, U2, U3 and U4. The U1, the U2, the D1 and the D2 are located in the same frequency band, the U3 and the D3 are located in the other frequency band, and the U4 and the D4 are located in the third frequency band.

A subscriber terminal supports the transmission of upstream signals over U1, U2, U3 and U4. Then U1 and U2 are one component carrier group (component carrier group 0) and U3 and U4 are each one component carrier group (component carrier group 1 and component carrier group 2).

The user terminal measures power headroom over the component carrier group, i.e., power headroom is measured together over component carriers U1 and U2, and power headroom is measured over component carriers U3 and U4, respectively.

Assuming that a user terminal transmits PUSCH on subframe i, component carrier U1, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Assuming the user terminalEstimated transmit power of PUSCH on subframe i, component carrier U1 of P'_PUSCH(i, 1), and the maximum transmission power configured by the user equipment on component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUSCH(i，1)[dB]

Assuming that a certain user terminal transmits PUSCH on subframe i, component carriers U1 and U2, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U1 is P'_PUSCH(i, 1), estimated transmit power of PUSCH on component carrier U2 is P'_PUSCH(i, 2), and the maximum transmission power configured by the user equipment on the component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUSCH(i，1)-P′_PUSCH(i，2)[dB]

Assuming that a user terminal transmits PUCCH on subframe i, component carrier U2, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Suppose the user terminal estimated transmit power of PUCCH on subframe i, component carrier U2 is P'_PUCCH(i, 2), and the maximum transmission power configured by the user equipment on the component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUCCH(i，2)[dB]

Suppose the user terminal transmits 2 PUCCH channels on sub-frame i, component carrier U2, with estimated transmit powers P'_PUCCH(i, 2, 0) and P'_PUCCH(i, 2, 1), then

P′_PUCCH(i，2)＝P′_PUCCH(i，2，0)+P′_PUCCH(i，2，1)

Assuming that a user terminal transmits PUSCH on subframe i, component carrier U1, and simultaneously transmits PUSCH and PUCCH on component carrier U2, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U1 is P'_PUSCH(i, 1), estimated transmit power of PUSCH on component carrier U2 is P'_PUSCH(i, 2), the estimated transmit power of PUCCH on component carrier U2 is P'_PUCCH(i, 2), and the maximum transmission power configured by the user equipment on the component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUSCH(i，1)-P′_PUSCH(i，2)-P′_PUCCH(i，2)[dB]

Assuming that a user terminal transmits PUCCH on subframe i, component carrier U1 and simultaneously transmits PUSCH and PUCCH on component carrier U2, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Suppose the user terminal estimated transmit power of PUCCH on subframe i, component carrier U1 is P'_PUCCH(i, 1), estimated transmit power of PUSCH on component carrier U2 is P'_PUSCH(i, 2), the estimated transmit power of PUCCH on component carrier U2 is P'_PUCCH(i, 2), and the maximum transmission power configured by the user equipment on the component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUCCH(i，1)-P′_PUSCH(i，2)-P′_PUCCH(i，2)[dB]

Assuming that a user terminal simultaneously transmits PUSCH and PUCCH on subframe i, component carrier U1, and PUSCH and PUCCH on component carrier U2, the user terminal measures power headroom PH (i, 0) on subframe i, component carrier group 0.

Suppose the user terminal estimated transmit power of PUSCH on subframe i, component carrier U1 is P'_PUSCH(i, 1), the estimated transmit power of PUCCH on component carrier U1 is P'_PUCCH(i, 1), estimated transmit power of PUSCH on component carrier U2 is P'_PUSCH(i, 2), the estimated transmit power of PUCCH on component carrier U2 is P'_PUCCH(i, 2), and the maximum transmission power configured by the user equipment on the component carrier group 0 is P_CMAX(0) Then the power headroom of the UE on subframe i, component carrier group 0 is

PH(i，0)＝P_CMAX(0)-P′_PUSCH(i，1)-P′_PUCCH(i，1)-P′_PUSCH(i，2)-P′_PUCCH(i，2)[dB]

Assuming that a user terminal transmits PUSCH and/or PUCCH on subframe i, component carrier U3 and U4, respectively, the user terminal measures power headroom PH (i, 1) and PH (i, 2) on subframe i, component carrier group 1 (i.e., component carrier U3) and component carrier group 2 (i.e., component carrier U4), respectively.

P_CMAX(0) Is the maximum transmission power configured by the user terminal on the component carrier group 0 (including the component carriers U1 and U2), and meets the requirement

P_CMAX(0)＝min{P_EMAX(1)+P_EMAX(2)，P_PA(0)}

Wherein P is_EMAX(1) And P_EMAX(2) Maximum allowed power configured for the system on component carriers U1 and U2, respectively; p_PA(0) Maximum transmit power supported by a power amplifier PA common to the user terminals for component carriers U1 and U2.

P_CMAX(1) And P_CMAX(2) The maximum transmission power of the user terminal configured on the component carrier group 1 (component carrier U3) and the component carrier group 2 (component carrier U4) respectively meets the requirement

P_CMAX(1)＝min{P_EMAX(3)，P_PA(1)}

P_CMAX(2)＝min{P_EMAX(4)，P_PA(2)}

Wherein P is_EMAX(1) And P_EMAX(2) Maximum allowed power configured for the system on component carriers U3 and U4, respectively; p_PA(1) And P_PA(2) Maximum transmit power supported by the power amplifier PA used at the user terminal for component carriers U3 and U4, respectively.

And is

P_CMAX(0)+P_CMAX(1)+P_CMAX(2)≤P_UMAX

P_UMAXThe total maximum transmit power for the user terminal.

When reporting the power ascending space to the base station, the user terminal indicates the reported power ascending space as the power ascending space on which component carrier group.

When the user terminal transmits a power headroom MAC layer control unit on a component carrier U1 (or U2 or U3 or U4) and reports the power headroom on a component carrier group 0 and/or 1 and/or 2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 00 (absolute index of component carrier group 0), 01 (absolute index of component carrier group 1), and 10 (absolute index of component carrier group 2), respectively.

Or,

when the user terminal transmits a power headroom MAC layer control unit on a component carrier U1 (or U2) and reports the power headroom on component carrier group 0 and/or 1 and/or 2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 00 (relative index of component carrier group 0), 01 (relative index of component carrier group 1), and 10 (relative index of component carrier group 2), respectively.

When the user terminal transmits a power headroom MAC layer control unit on a component carrier U3 to report the power headroom on component carrier group 0 and/or 1 and/or 2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 10 (relative index of component carrier group 0), 00 (relative index of component carrier group 1), and 01 (relative index of component carrier group 2).

When the user terminal transmits a power headroom MAC layer control unit on a component carrier U4 to report the power headroom on component carrier group 0 and/or 1 and/or 2 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 01 (relative index of component carrier group 0), 10 (relative index of component carrier group 1), and 00 (relative index of component carrier group 2).

Or,

assuming that the component carrier U2 is a camping component carrier of the ue, when the ue sends a power headroom MAC layer control unit on the component carrier U2 and reports the power headroom on the component carrier U1 and/or U2 and/or U3 and/or U4 to the base station, the highest 2 bits in the power headroom MAC layer control unit are 00 (relative index of component carrier group 0), 01 (relative index of component carrier group 1), and 10 (relative index of component carrier group 2), respectively.

EXAMPLE III

Assuming an LTE-a system, operating in TDD mode, there are five component carriers C0, C1, C2, C3 and C4 in the system. Wherein, C0 and C1 are located in the same frequency band, C2 is located in another frequency band, and C3 and C4 are located in a third frequency band.

A user terminal supports the transmission of uplink signals on C0, C1, C2, C3 and C4.

The ue measures power headroom over component carriers C0, C1, C2, C3, and C4, respectively.

Suppose a user terminal is in subframe i, component carrier C_kUplink PUSCH transmission, user terminal in subframe i, component carrier C_kThe upper measurement power headroom PH (i, k), k is 0,1, 2, 3, 4.

Assuming that the user terminal estimates in subframe i, component carrier C_kTransmission power of PUSCH on is P'_PUSCH(i, k) and the user terminal is in component carrier C_kMaximum transmission power configured is P_CMAX(k) Then the UE is in sub-frame i, component carrier C_kPower headroom of

PH(i，k)＝P_CMAX(k)-P′_PUSCH(i，k)[dB]

Suppose a user terminal is in subframe i, component carrier C_kUplink transmission PUCCH with user terminal in subframe i, component carrier C_kThe power headroom PH (i, k) is measured.

Assuming that the user terminal estimates in subframe i, component carrier C_kThe transmission power of the PUCCH on is P'_PUCCH(i, k) and the user terminal is in component carrier C_kMaximum transmission power configured is P_CMAX(k) Then the UE is in sub-frame i, component carrier C_kPower headroom of

PH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

Assuming that the user terminal is in subframe i, component carrier C_k3 PUCCH channels are transmitted, and the estimated transmission power is P'_PUCCH(i，k，0)，P′_PUCCH(i, k, 1) and P'_PUCCH(i, k, 2), then

P′_PUCCH(i，k)＝P′_PUCCH(i，k，0)+P′_PUCCH(i，k，1)+P′_PUCCH(i，k，2)

Suppose a user terminal is in subframe i, component carrier C_kThe PUSCH and the PUCCH are simultaneously transmitted, and the user terminal transmits the component carrier C in the subframe i_kThe power headroom PH (i, k) is measured.

Assuming that the user terminal estimates in subframe i, component carrier C_kTransmission power of PUSCH on is P'_PUSCH(i, k), the estimated transmission power of PUCCH is P'_PUCCH(i, k) and the user terminal is in component carrier C_kMaximum transmission power configured is P_CMAX(k) Then the UE is in sub-frame i, component carrier C_kPower headroom of

PH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)-P′_PUSCH(i，k)[dB]

Or

PH_PUCCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

PH_PUSCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)-P′_PUSCH(i，k)[dB]

Or

PH_PUCCH(i，k)＝P_CMAX(k)-P′_PUCCH(i，k)[dB]

PH_PUSCH(i，k)＝P_CMAX(k)-P′_PUSCH(i，k)[dB]

P_CMAX(k) Is the user terminal is in component carrier C_kMaximum transmission power of upper configuration, satisfy

P_CMAX(k)≤P_EMAX(k)

And is

Wherein, P_EMAX(k) In component carrier C for system_kMaximum allowed power configured above; p_UMAXIs the total maximum transmit power of the user terminal, based on the power class of the user terminal.

And, the user terminal is in component carrier C_kMaximum transmission power P configured above_CMAX(k) Is limited to the component carrier C_kThe maximum transmit power supported by a power amplifier PA used at the user terminal. Suppose that the component carriers C0 and C1 share a PA0 at the user terminal, and the maximum supported transmit power is P_PA(0) (ii) a C2 uses a power amplifier PA1 alone, and supports the maximum transmitting power P_PA(1) (ii) a C3 and C4 share one power amplifier, namely a PA2, and the maximum supported transmission power is P_PA(2) Then, then

P_CMAX(0)+P_CMAX(1)≤P_PA(0)

P_CMAX(2)≤P_PA(1)

P_CMAX(3)+P_CMAX(4)≤P_PA(2)

When the user terminal is in component carrier C_k0The MAC layer control unit of the upper transmission power ascending space reports the component carrier C to the base station_kIn the power headroom, the highest 3 bits or 2 bits in the power headroom MAC layer control unit are component carriers C_kAbsolute index k, or component carrier C_kK ', k ═ k-k (k-k) relative to the index (k' k)₀) mod 5 or n ═ (k)₀-k)mod 5。

Example four

Assuming an LTE-a system operating in TDD mode, there are five component carriers C0, C1, C2, C3 and C4 in the system, which are located in the same frequency band.

The user terminal measures the power headroom together over the component carriers C0, C1, C2, C3, C4.

Assuming that a certain user terminal transmits PUSCH on subframe i, the user terminal measures power headroom ph (i) on subframe i.

Assuming that the user terminal transmits PUSCH on subframe i, C0, C1, C2, the user terminal estimates the transmission power of PUSCH on subframe i to be P'_PUSCH(i) Is composed of

P′_PUSCH(i)＝P′_PUSCH(i，0)+P′_PUSCH(i，1)+P′_PUSCH(i，2)[dBm]

Wherein the user terminal estimates component carrier C in subframe i_kTransmission power of PUSCH on is P'_PUSCH(i，k)，k＝0，1，2。

And the maximum transmitting power configured by the user terminal is P_CMAXThen the power headroom of the UE on subframe i is

PH(i)＝P_CMAX-P′_PUSCH(i)[dB]

Assuming that a certain user terminal transmits PUCCH on subframe i, the user terminal measures power headroom ph (i) on subframe i.

Assuming that the user terminal transmits PUCCH in subframe i, C0, C2, the user terminal estimates the transmission power of PUCCH in subframe i to be P'_PUCCH(i) Is composed of

P′_PUCCH(i)＝P′_PUCCH(i，0)+P′_PUCCH(i，2)[dBm]

Wherein the user terminal estimates component carrier C in subframe i_kThe transmission power of the PUCCH on is P'_PUCCH(i，k)，k＝0，2。

Suppose the user terminal transmits 2 PUCCH channels on sub-frame i, component carrier C2, with estimated transmit powers P'_PUCCH(i, 2, 0) and P'_PUCCH(i, 2, 1), then

P′_PUCCH(i，2)＝P′_PUCCH(i，2，0)+P′_PUCCH(i，2，1)

PH(i)＝P_CMAX-P′_PUCCH(i)[dB]

Assuming that a certain user terminal simultaneously transmits PUSCH and PUCCH on subframes i, C0, and C3, the user terminal measures power headroom ph (i) on subframe i.

Assuming that the user terminal transmits PUSCH on subframe i, C0, C3, the user terminal estimates the transmission power of PUSCH on subframe i to be P'_PUSCH(i) Is composed of

P′_PUSCH(i)＝P′_PUSCH(i，0)+P′_PUSCH(i，3)[dBm]

Wherein the user terminal estimates component carrier C in subframe i_kTransmission power of PUSCH on is P'_PUSCH(i，k)，k＝0，3。

Assuming that the user terminal transmits PUCCH in subframe i, C0, C3, the user terminal estimates the transmission power of PUCCH in subframe i to be P'_PUCCH(i) Is composed of

P′_PUCCH(i)＝P′_PUCCH(i，0)+P′_PUCCH(i，3)[dBm]

Wherein the user terminal estimates component carrier C in subframe i_kThe transmission power of the PUCCH on is P'_PUCCH(i，k)，k＝0，3。

Suppose the user terminal transmits 2 PUCCH channels on sub-frame i, component carrier C0, and 2 PUCCH channels on component carrier C3, with estimated transmit powers P'_PUCCH(i, 0, 0) and P'_PUCCH(i，0，1)，P′_PUCCH(i, 3, 0) and P'_PUCCH(i, 3, 1), then

P′_PUCCH(i)=P′_PUCCH(i，0，0)+P′_PUCCH(i，0，1)+P′_PUCCH(i，3，0)+P′_PUCCH(i，3，1)

And the maximum transmitting power configured by the user terminal is P_CMAXIf the power headroom of the SS at subframe i is PH (i)

PH(i)=P_CMAX—P′_PUCCH(i)-P′_PUSCH(i)[dB]

Or is pH_PUCCH(i) And pH_PUSCH(i)

PH_PUCCH(i)=P_CMAX—P′_PUCCH(i)[dB]

PH_PUSCH(i)=P_CMAX—P′_PUCCH(i)-P′_PUSCH(i)[dB]

Or is pH_PUCCH(i) And pH_PUSCH(i)

PH_PUCCH(i)=P_CMAX—P′_PUCCH(i)[dB]

PH_PUSCH(i)=P_CMAX—P′_PUSCH(i)[dB]

The maximum allowable power configured by the system to the user terminal is P_EMAXDepending on the power class of the user terminal, the configuration of the power amplifier PA, etc., the user terminal is alwaysHas a maximum transmission power of P_UMAXThen, then

P_CMAX=min{P_EMAX，P_UMAX}

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A method of measuring power headroom, comprising: when a user terminal sends an uplink physical channel on a subframe i and a component carrier group j, the user terminal measures a power ascending space on the subframe i and the component carrier group j, wherein the uplink physical channel is a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH), and the component carrier group j comprises one or more component carriers;

when the user terminal sends PUSCH or PUCCH on the subframe i and the component carrier group j, the user terminal takes the difference between the maximum transmitting power configured on the component carrier group j and the transmitting power of the PUSCH or PUCCH which is estimated by the user terminal and sent on the subframe i and the component carrier group j as the power ascending space measured by the user terminal on the subframe i and the component carrier group j;

when the user terminal sends the PUCCH or PUSCH on a plurality of component carriers in a subframe i and a component carrier group j, the transmission power of the PUCCH or PUSCH which is estimated by the user terminal and sent on the subframe i and the component carrier group j is the sum of the transmission powers of the PUCCH or PUSCH which is estimated by the user terminal and sent on the plurality of component carriers.

2. The method of claim 1, wherein when a user terminal transmits multiple PUCCHs on any one of the component carriers in the sub-frame i and the component carrier group j, the user terminal estimates transmit power of each PUCCH transmitted on the component carrier for the component carrier, and the sum of the transmit power of each PUCCH transmitted on the component carrier is used as the transmit power of the PUCCH transmitted on the component carrier estimated by the user terminal.

3. The method of claim 1, wherein when a user terminal simultaneously transmits PUSCH and PUCCH in subframe i, component carrier group j, the power headroom measured by the user terminal in subframe i, component carrier group j is PH (i, j):

PH(i,j)＝P_CMAX(j)-P′_PUCCH(i,j)-P′_PUSCH(i,j)

or is pH_PUCCH(i, j) and PH_PUSCH(i,j)：

PH_PUCCH(i,j)＝P_CMAX(j)-P′_PUCCH(i,j)

PH_PUSCH(i,j)＝P_CMAX(j)-P′_PUCCH(i,j)-P′_PUSCH(i, j) or PH_PUSCH(i,j)＝P_CMAX(j)-P′_PUSCH(i,j)

Wherein, P'_PUSCH(i, j) is the estimated PUSCH transmit power on subframe i, component carrier group j, P 'of the user terminal'_PUCCH(i, j) estimated presence for said user terminalFrame i, transmit power of PUCCH on component carrier group j, P_CMAX(j) And configuring the maximum transmitting power of the user terminal on the component carrier group j.

4. The method of claim 1 or 3, wherein the maximum transmit power configured by the user terminal on component carrier group j is not greater than the maximum allowed power configured by the system on component carrier group j; and/or, the maximum transmitting power configured by the user terminal on the component carrier group j is not greater than the sum of the maximum allowed power configured by the system on each component carrier in the component carrier group j; and/or the sum of the maximum transmitting power configured by the user terminal on the component carrier group j and the maximum transmitting power configured by the user terminal on other component carrier groups is not more than the total maximum transmitting power of the user terminal; and/or the maximum transmission power configured by the user terminal on the component carrier group j is not greater than the maximum transmission power supported by the power amplifier shared by the component carrier group j at the user terminal.

5. The method of claim 1, wherein a user terminal transmitting an uplink physical channel on subframe i, component carrier group j means that the user terminal transmits a PUSCH on one or more component carriers within component carrier group j and/or transmits one or more PUCCHs on one or more component carriers within component carrier group j on subframe i.

6. The method of claim 1, wherein the component carrier group j contains all component carriers using the same power amplifier at the user terminal; or, the component carrier group j includes all component carriers that can be supported by the user equipment.

7. A method for reporting power headroom, wherein a ue reports the power headroom to a base station after measuring the power headroom by using the method of any one of claims 1 to 6, and further indicates a component carrier or a component carrier group to which the reported power headroom belongs when reporting.

8. The method of claim 7, wherein the UE reports the power headroom through a power headroom MAC layer Control Element (CE), and wherein an absolute index or a relative index of a component carrier or a component carrier group is used to indicate a component carrier or a component carrier group to which the reported power headroom belongs in the CE.

9. The method of claim 7, wherein the UE indicates an absolute index or a relative index of a component carrier or a component carrier group to which the reported power headroom belongs using the highest M bits of the MAC layer control element.

10. The method according to claim 8 or 9, wherein if a system carrier aggregates N uplink component carriers or component carrier groups, or a current system schedules N uplink component carriers or component carrier groups to the user terminal, the absolute indexes of the N uplink component carriers or component carrier groups are ordered as N-0, 1, …, N-1 in ascending or descending order of component carrier center frequency;

or, if the absolute index of the component carrier or the component carrier group carrying the currently reported power ascending space medium access control layer control unit is n₀The relative index is 0, and the relative index n' of each component carrier or component carrier group is (n-n)₀) mod N or N ═ N (N)₀-n)mod N；

Or, if the absolute index of the camping component carrier or the component carrier group to which the camping component carrier belongs of the user equipment is n1, the relative index thereof is 0, and the relative index n' of each component carrier or component carrier group is (n-n) ═ n₁) mod N or N ═ N (N)₁-n)mod N。

11. The method of claim 7, wherein the user terminal reports power headroom on its camping component carrier;

12. A device for measuring power headroom is characterized in that the device comprises a unit for measuring the power headroom on a subframe i and a component carrier group j when an uplink physical channel is transmitted on the subframe i and the component carrier group j, wherein the uplink physical channel is a Physical Uplink Shared Channel (PUSCH) and/or a Physical Uplink Control Channel (PUCCH), and the component carrier group j comprises one or more component carriers;

the device comprises a unit used for taking the difference between the maximum transmission power configured on a component carrier group j and the estimated transmission power of the PUSCH or PUCCH transmitted on the subframe i, the component carrier group j as the power ascending space measured by the device on the subframe i, the component carrier group j when the PUSCH or PUCCH is transmitted on the subframe i, the component carrier group j;

the apparatus includes means for estimating transmit power of a PUCCH or PUSCH transmitted on a component carrier group j in subframe i when the PUCCH or PUSCH is transmitted on a plurality of component carriers within the component carrier group j, the apparatus is configured to sum the estimated transmit power of the PUCCH or PUSCH transmitted on the plurality of component carriers.

13. The apparatus of claim 12, wherein the apparatus comprises means for estimating transmit power of each PUCCH transmitted on a component carrier when multiple PUCCHs are transmitted on any one of the component carriers in subframe i, component carrier group j, for the component carrier, and using a sum of the transmit power of each PUCCH transmitted on the component carrier as the transmit power of the PUCCH transmitted on the component carrier estimated by the apparatus.

14. The apparatus of claim 12, wherein the apparatus comprises means for measuring a power headroom of PH (i, j) over subframe i, component carrier group j when PUSCH and PUCCH are simultaneously transmitted over subframe i, component carrier group j,

PH(i,j)＝P_CMAX(j)-P′_PUCCH(i,j)-P′_PUSCH(i,j)

or is pH_PUCCH(i, j) and PH_PUSCH(i,j)：

PH_PUCCH(i,j)＝P_CMAX(j)-P′_PUCCH(i,j)

Wherein, P'_PUSCH(i, j) is the transmit power of PUSCH on subframe i, component carrier group j, P 'estimated by the apparatus'_PUCCH(i, j) is the transmission power, P, of PUCCH on subframe i, component carrier group j estimated by the apparatus_CMAX(j) A maximum transmit power configured for the apparatus on component carrier group j.

15. An apparatus for reporting power headroom, comprising a unit configured to report the power headroom to a base station after measuring the power headroom by using the method according to any one of claims 1 to 6, and further indicate a component carrier or a component carrier group to which the reported power headroom belongs when reporting.

16. The apparatus of claim 15, wherein the apparatus comprises means for reporting the power headroom through a power headroom medium access control layer control unit in which a component carrier or component carrier group to which the reported power headroom belongs is indicated using an absolute index or a relative index of the component carrier or component carrier group.

17. The apparatus of claim 16, wherein the apparatus comprises means for indicating an absolute index or a relative index of a component carrier or a component carrier group to which the reported power headroom belongs using a highest M-bit of the power headroom medium access control layer control element.

18. The apparatus of claim 15,

the device comprises a unit for reporting power ascending space on the resident component carrier; or, a unit for reporting power headroom on a current component carrier wave for sending PUSCH; and simultaneously carrying the power ascending space of one or more component carrier groups on the component carrier for sending the PUSCH.