WO2011160281A1

WO2011160281A1 - Method and system for transmitting power headroom report

Info

Publication number: WO2011160281A1
Application number: PCT/CN2010/074165
Authority: WO
Inventors: 杜忠达; 陈中明
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-06-21
Filing date: 2010-06-21
Publication date: 2011-12-29

Abstract

The present invention discloses a method for transmitting a Power Headroom Report (PHR), which includes steps: a threshold for triggering the power headroom report of each component carrier simultaneously is set; and if a User Equipment (UE) determines that the sum of the transmission power of each component carrier exceeds the preset threshold, then report of the PHR of each component carrier is triggered simultaneously; the UE receives an uplink authorization from a base station, and transmits the PHR of each component carrier to the base station. The present invention also discloses a system for transmitting the power headroom report correspondingly. The present invention can resolve the problem that the base station inaccurately estimates the sum of the transmission power of the UE over all component carriers according to the PHR of each component carrier which may be reported at different time, thus inaccurate uplink scheduling and power control actions, caused by the above problem, are avoided, and air interface signaling is saved simultaneously.

Description

Method and system for transmitting power headroom report

The present invention relates to the field of carrier aggregation, and in particular, to a method and system for transmitting a Power Headroom Report (PHR). Background technique

In the Long Term Evolution (LTE) system, the current transmit power of the user terminal (UE) cannot exceed the maximum transmit power of the UE. Generally, the UE transmits the maximum transmit power of the UE to the current uplink shared channel (UL-SCH) through the PHR process. Notifying the eNB of the difference in transmit power, the base station performs uplink scheduling and link adaptation according to the difference, and further determines whether to perform power control (such as reducing transmit power or increasing transmit power, and the amount of power that needs to be adjusted) to satisfy the current UE. The transmit power cannot exceed the maximum transmit power requirement of the UE. The PHR process is performed by the UE sending the MAC CE of the PHR to the network side.

The formula for calculating PH is as follows:

PH(i) = PCMAX - PpuscH(i)

Where the dimension of PH(i) is dB, indicating the maximum transmit power (PCMAX) of the UE on subframe i and

The ratio of power (milliwatts) between P _PUSCH (i), PCMAX is the UE's maximum uplink transmit power (P-Max), maximum power loss (MPR), and additional maximum power loss (A- according to the network side configuration). MPU) and other information are calculated; P _PUSCH (i) is the estimated theoretical uplink transmit power of the physical uplink shared channel (PUSCH). When the theoretical transmit power is greater than PCMAX, the actual transmit power is equal to P.

In the prior art, the base station controls the process of the UE transmitting the PHR by using the following three parameters: periodicPHR-Timer, prohibitPHR-Timer, and dl-PathlossChange, and the base station specifically notifies the UE by using RRC signaling, specifically: dl-PathlossChange is the DL path loss (PL) change threshold set on the network side. The protocol stipulates that since the last PHR transmission, and after the prohibitPHR-Timer times out, the PHR is triggered when the DL path loss changes beyond the dl-PathlossChange. This is because the DL path loss change will eventually affect the uplink power control.

The periodicPHR-Timer is the PHR periodic reporting timer, which is started when the first uplink grant is received after the MAC reset. After the periodicPHR-Timer times out, the PHR is triggered, and the PHR is re-understood after the PHR is reported.

prohibitPHR-Timer disables the PHR reporting timer. When the prohibit PHR-Timer is running, it is forbidden to trigger the PHR. After the UE reports the PHR, the prohibitPHR-Timer is started to prevent the terminal from triggering the PHR frequently in a relatively short period of time.

After the event triggers the PHR, the UE receives the uplink grant, and prepares to obtain the PH value of the current subframe through the physical layer when the PUSCH is sent in the corresponding subframe, and generates and sends the MAC CE based on the PH value.

In R10, the UE may communicate with the base station by using multiple component carriers in a connected state, where the multiple component carriers include one primary component carrier (PCC), and 0-4 secondary component carriers (Secondary Component Carrier) , SCC). At present, there are two types of PHRs that should be reported. One is the ratio of the maximum transmit power of the UE on a certain component carrier to the PUSCH transmit power on the component carrier. The second is that after considering the transmit power of the PUCCH, the UE is at some The ratio of the maximum transmit power on the component carrier to the PUSCH on the component carrier. And it is considered that for PCC, the second PHR should be reported because PUSCH and PUCCH are sent simultaneously on the PCC. If only PUSCH is sent, only the first PHR can be reported on the SCC.

Due to the characteristics of multi-carrier aggregation in R10, the requirement of R8, that is, the current transmit power of the UE cannot exceed the maximum transmit power of the UE, is considered to be the requirement of the component carrier, that is, the current transmit power of the UE on a certain component carrier cannot exceed the component carrier. The maximum transmit power allowed on the top. Based on, There is also a need to introduce a new requirement that the UE's transmit power on all component carriers cannot add up to exceed the maximum transmit power allowed by the UE (as opposed to the maximum transmit power allowed on each component carrier).

In order to meet this new requirement, the base station can estimate whether the total transmit power of the UE on all component carriers exceeds the maximum transmit power allowed by the UE according to the PHR reported on each component carrier. However, the current management of the PHR on each component carrier. It is independent, that is, the time when the PHR is reported by each component carrier may be different. It is inaccurate for the base station to estimate whether the total transmit power of the UE on all component carriers exceeds the maximum transmit power allowed by the UE according to the PHR reported at different times. If the base station performs uplink scheduling and power control according to the inaccurate estimation, it may get the opposite effect; or, the UE may report the PHR of all component carriers after a certain component carrier triggers the PHR, but in general, The sum of the transmit powers on the respective component carriers does not exceed the maximum transmit power allowed by the UE. If the PHR of each component carrier is always reported at the same time, excessive signaling burden is introduced. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method and system for transmitting a power headroom report, which can improve the accuracy of the base station to estimate the UE's transmit power on all component carriers, thereby improving the effectiveness of uplink scheduling and power control. And can reduce the signaling burden.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

A method for transmitting a power headroom report, which presets a threshold for simultaneously triggering a power headroom of each component carrier to report a PHR, the method comprising:

The UE determines that the sum of the transmit powers of the respective component carriers exceeds the preset threshold, and simultaneously triggers the PHR of each component carrier;

The uplink grant from the base station received by the UE sends the PHR of each component carrier to the base station.

The threshold of the PHR that simultaneously triggers each component carrier is set to an absolute value or a relative value. Determining, by the UE, whether a sum of transmission powers of the respective component carriers exceeds the preset threshold The UE determines whether the total transmit power of each component carrier exceeds the preset threshold in real time.

The determining, by the UE, whether the sum of the transmit powers of the component carriers exceeds the preset threshold is: when the PHR of any component carrier needs to be reported, whether the sum of the transmit powers of the component carriers exceeds the preset threshold Judge.

The method further includes: setting a PHR detection period of the UE,

And determining, by the UE, whether the sum of the transmit powers of the component carriers exceeds the preset threshold: periodically determining whether the sum of the transmit powers of the component carriers exceeds the preset threshold according to the PHR detection period of the UE.

The PHR detection period of the UE is set by the base station, and is notified to the UE by using RRC signaling; or is obtained by the UE.

The method further includes: setting a PHR period reporting timer of each component carrier,

The UE calculates the PHR detection period of the UE as follows: The UE determines that the minimum value or the greatest common divisor of the PHR period reporting timer on each component carrier is the PHR detection period of the UE.

Sending, by the UE, the PHR of each component carrier to the base station according to the received uplink grant from the base station:

The UE first receives the uplink grant of a certain component carrier, and then sends the PHR of each component carrier on the component carrier;

The UE simultaneously receives the uplink grant of each component carrier, and then sends its own PHR on each component carrier, or arbitrarily selects an uplink grant to transmit the PHR of each component carrier;

If the UE receives the uplink grant of more than one but not all of the component carriers at the same time, the PHR of the component carrier that has not received the uplink grant is sent according to a certain rule or random, while transmitting the PHR of the component carrier that receives the uplink grant. The component carriers allocated to the uplink grant are allocated for transmission, or an uplink grant is used to transmit the PHR of each component carrier.

The component carrier is a configured uplink component carrier; or, is configured and activated Line component carrier.

A transmission system for a power headroom report, including a base station and a UE;

The UE is configured to trigger the reporting of each component carrier PHR while determining that the sum of the transmit powers of the component carriers exceeds a preset threshold, and then send the PHR of each component carrier according to the received uplink grant from the base station. To the base station.

The preset threshold is an absolute value or a relative value.

The UE determines whether the sum of the transmit powers of the respective component carriers exceeds the preset threshold: the UE determines whether the sum of the transmit powers of the respective component carriers exceeds the preset threshold in real time.

And determining, by the UE, whether the sum of the transmit powers of the component carriers exceeds the preset threshold is: periodically determining whether the sum of the transmit powers of the component carriers exceeds the preset threshold according to the PHR detection period of the UE.

The base station is further configured to set a PHR detection period of the UE, and notify the UE by using RRC signaling; or

The UE is further configured to calculate a PHR detection period of the UE.

When the UE receives the uplink grant of each component carrier at the same time, it sends separately on each component carrier. Its own PHR;

If the UE receives the uplink grant of more than one but not all of the component carriers at the same time, the PHR of the component carrier that has not received the uplink grant is sent according to a certain rule or random, while transmitting the PHR of the component carrier that receives the uplink grant. The component carrier allocated to the uplink grant is allocated for transmission.

The component carrier is a configured uplink component carrier; or, is a configured and activated uplink component carrier.

The method and system for transmitting a power headroom report according to the present invention, setting a threshold for simultaneously triggering a PHR of each component carrier, and when the sum of the transmission powers of the respective component carriers exceeds the threshold of the PHR of each component carrier simultaneously, the UE simultaneously triggers each component carrier. The PHR, and the uplink authorization after receiving the base station is reported. The method proposed by the present invention can solve the problem that the base station in R10 estimates the sum of the transmit power of the UE on all component carriers according to the PHRs that may be reported by different component carriers at different times, thereby avoiding the inaccurate uplink caused thereby. Scheduling and power control behavior while saving air interface signaling. DRAWINGS

1 is a schematic flow chart of a method for transmitting a power headroom 4 report according to the present invention;

2 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 1 of the present invention;

3 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 2 of the present invention;

FIG. 4 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 3 of the present invention. detailed description

The basic idea of the present invention is to: set a threshold for simultaneously triggering the PHR of each component carrier. When the sum of the transmit powers of the component carriers exceeds the threshold of the PHR of each component carrier, the UE simultaneously triggers the reporting of the component carriers PHR.

1 is a schematic flowchart of a method for transmitting a power headroom 4 report according to the present invention, as shown in FIG. The method for transmitting the invention power margin 4 report includes:

Step 101: The UE determines that the sum of the transmit powers of the component carriers exceeds the threshold of the PHR of each component carrier, and triggers the reporting of the component carriers PHR.

The threshold for triggering the PHR of each component carrier at the same time is generally set by the base station, and the UE is notified by the RRC signal. The threshold of the PHR that simultaneously triggers each component carrier is set to an absolute value or a relative value, and the relative value may be a positive value or a negative value.

Here, the UE may determine whether the sum of the transmission powers of the respective component carriers (ie, all component carriers) exceeds the threshold of the PHR of each component carrier in real time, that is, at each transmission time interval (ΤΉ), or may be determined according to a certain period. Whether the sum of the transmission powers of the respective component carriers exceeds the threshold of the PHR of each component carrier is periodically determined, and when the PHR of any component carrier needs to be reported, whether the sum of the transmission powers of the respective component carriers exceeds the simultaneous triggering The threshold of the PHR of each component carrier is determined, and it is determined that the PHR of any component carrier needs to be reported as a prior art, and will not be described in detail herein.

In the case that the UE performs the determination according to a certain period, the PHR detection period (eriodicUEPHR-Timer) of the UE may be set by the base station, and the UE may be notified by RRC signaling, or may be obtained by the UE according to the protocol, for example, the UE may determine periodicUEPHR-Timer is the minimum or maximum common divisor of periodicPHR-Timer on each component carrier.

It should be noted that the configuration of the PHR, such as periodicPHR-Timer, prohibitPHR-Timer, and dl-PathlossChange, is a configuration of each component carrier. The base station can notify the UE through the RRC connection setup message, or modify the RRC reconfiguration command. Or notify the UE by using a handover command, or notify the UE by using an RRC reestablishment command. When the UE receives the configuration or modification of these parameters, the MAC layer will be reset. The terminal then triggers and uploads the PHR upon receipt of the first upstream grant.

Step 102: The UE applies each component carrier according to the received uplink grant from the base station. The PHR is sent to the base station.

Here, if the UE first receives the uplink grant of a certain component carrier, the PHR of each component carrier is transmitted on the component carrier; if the UE simultaneously receives the uplink grant of each component carrier, respectively, the UE transmits the uplink grant on each component carrier. Its own PHR, or optionally an uplink grant to transmit the PHR of each component carrier; if the UE receives uplink grants of more than one but not all component carriers at the same time, it transmits its own PHR on the component carrier that receives the uplink grant. At the same time, the PHR of the component carrier that does not receive the uplink grant is randomly allocated to the component carrier that receives the uplink grant according to a certain rule or randomly, or an uplink grant is used to transmit the PHR of each component carrier.

The component carrier described in the present invention refers to a configured uplink component carrier, or a configured and activated uplink component carrier.

The present invention also provides a transmission system for a power headroom report, including a base station and a UE. The UE is configured to trigger each component carrier PHR at the same time when determining that the sum of the transmit powers of the respective component carriers exceeds a preset threshold. After reporting, the PHR of each component carrier is sent to the base station according to the received uplink grant from the base station.

The preset threshold is an absolute value or a relative value.

The determining, by the UE, whether the sum of the transmit powers of the component carriers exceeds the preset threshold is: periodically determining whether the sum of the transmit powers of the component carriers exceeds the preset threshold according to the PHR detection period of the UE. The base station is further configured to set a PHR detection period of the UE, and notify the UE by using RRC signaling; or

The UE is further configured to calculate a PHR detection period of the UE.

The UE simultaneously receives the uplink grant of each component carrier, and then transmits its own PHR on each component carrier;

The technical solution of the present invention will be further described in detail below with reference to specific embodiments. For the sake of clarity, the following embodiment is described only from the perspective of aggregation of two CCs, and the process of aggregation of three or more CCs is the same.

Example 1

In this embodiment, the UE is configured with CC1 and CC2 in the uplink, where CC1 is PCC and CC2 is SCC. The parameters of CC1 and CC2 control PHR are the same. Specifically, periodicPHR-Timer=20ms (20 subframes, ie 20ms), prohibitPHR-Timer=10ms, dl-PathlossChange=3db. In addition, set the maximum transmit power allowed by the UE to 23dbm. The threshold of the PHR that simultaneously triggers each component carrier is 18 dbm (or, the threshold of the PHR that simultaneously triggers each component carrier is set to be lower or higher than the maximum transmit power allowed by the UE by 5 db).

In this embodiment, at any time (each ΤΉ), when the UE detects that the sum of the transmit powers on all the uplink component carriers exceeds the threshold of the PHR of each component carrier (such as 18 dbm), or the UE detects The sum of the transmit powers on all uplink component carriers is lower or higher

When the maximum transmit power allowed by the UE is 5db, the PHR of CC1 and CC2 is triggered at the same time.

2 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 1 of the present invention. As shown in FIG. 2, at time T1 (subframe, or TTI at time T1), periodicPHR-Timer on CC1 times out, triggering PHR of CC1;

At time T2, the UE receives the uplink grant of CC1, sends the PHR of CC1 on CC1, and restarts the eriodicPHR-Timer and rohibitPHR-Timer of CC1;

At time T3, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm, and simultaneously triggers the PHR of CC1 and CC2;

At time T4, the UE receives the uplink grant of CC2, and transmits the PHR of CC1 and CC2 on CC2, and the periodicPHR-Timer and prohibitPHR-Timer of CC1 and CC2 are restarted;

At time T6, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm, and simultaneously triggers the PHR of CC1 and CC2;

At time T7, the UE receives the uplink grant of CC1 and CC2 at the same time, sends the PHR of CC1 on CC1, transmits the PHR of CC2 on CC2, and restarts periodicPHR-Timer and rohibitPHR-Timer of CC1 and CC2;

At time T8, the UE detects that the PL change on CC2 exceeds the specified 3db, triggering the PHR of CC2;

At time T9, the UE receives the uplink grant of CC2, sends the PHR of CC2 on CC2, and restarts the eriodicPHR-Timer and rohibitPHR-Timer of CC2;

At time T10, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm. Triggering the PHR of CC1 and CC2;

At the time of Til, the UE receives the uplink grant of CC1, and transmits the PHR of CC1 and CC2 on CC1, and the periodicPHR-Timer and prohibitPHR-Timer of CC1 and CC2 are restarted. Example 2

In this embodiment, the UE is configured with CC1 and CC2 in the uplink, where CC1 is PCC and CC2 is SCC. CC1 and CC2 have the same parameter configuration for controlling PHR. Specifically, periodicPHR-Timer=20ms (20 subframes, ie 20ms), prohibitPHR-Timer=10ms, dl-PathlossChange=3db. In addition, the maximum transmit power allowed by the UE is set to 23 dbm, and the threshold of the PHR for triggering each component carrier is set to be 18 dbm. Alternatively, the threshold of the PHR that simultaneously triggers each component carrier is set to be lower or higher than the maximum transmit power allowed by the UE. The value of 5db.

In this embodiment, when there is no prohibit PHR-Timer running, the UE detects that the sum of the transmit powers on all the uplink component carriers exceeds the set threshold of the PHR of each component carrier (such as 18 dbm), or the UE When it is detected that the sum of the transmission powers on all the uplink component carriers is lower than or higher than the maximum transmission power allowed by the UE by 5 db, the PHRs of CC1 and CC2 are simultaneously triggered.

3 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 2 of the present invention. As shown in FIG. 3, at time T1, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm, and simultaneously triggers the PHR of CC1 and CC2;

At time T2, the UE receives the uplink grant of CC1 and CC2 at the same time, sends the PHR of CC1 on CC1, transmits the PHR of CC2 on CC2, and restarts periodicPHR-Timer and prohibitPHR-Timer of CC1 and CC2;

At time T3, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm, but

The prohibitPHR-Timer of CC1 and CC2 is running, so the PHR is not triggered;

At time T4, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dBm, and simultaneously triggers the PHRs of CC1 and CC2; At time T5, the UE receives the uplink grant of CC2, sends the PHR of CC1 and CC2 on CC2, and restarts the periodicPHR-Timer and prohibitPHR-Timer of CC1 and CC2;

At time T6, the UE detects that the PL change on CC2 exceeds the specified 3db, triggering the PHR of CC2;

At time T7, the UE receives the uplink grant of CC2, sends the PHR of CC2 on CC2, and restarts the eriodicPHR-Timer and rohibitPHR-Timer of CC2;

At time T9, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dbm, but CC2's prohibit PHR-Timer is running, so the PHR is not triggered;

At time T11, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds 18 dbm, but CC1's prohibit PHR-Timer is running, so the PHR is not triggered. Example 3

In this embodiment, the UE is configured with CC1 and CC2 in the uplink, where CC1 is PCC and CC2 is SCC. The parameters of CC1 and CC2 control PHR are the same. Specifically, periodicPHR-Timer=20ms (20 subframes, ie 20ms), prohibitPHR-Timer=10ms, dl-PathlossChange=3db. In addition, the maximum transmit power allowed by the UE is set to 23 dbm, and the threshold of the PHR for triggering each component carrier is set to be 18 dbm. Alternatively, the threshold of the PHR that simultaneously triggers each component carrier is set to be lower or higher than the maximum transmit power allowed by the UE. The value of 5db. In addition, the embodiment further relates to a PHR detection period periodic UEPHR-Timer of the UE, and the UE detects the sum of the transmission powers on all uplink component carriers according to the periodic UEPHR-Timer timing, if the sum of the transmission powers on all the uplink component carriers exceeds At the same time, the threshold of the PHR of each component carrier (such as 18dbm) is triggered, and the PHR of CC1 and CC2 is triggered at the same time. Here, the periodic UEPHR-Timer timing length may be selected as 10 ms, and the base station notifies the UE by using RRC signaling. Of course, the periodic UEPHR-Timer may not notify the UE by using RRC signaling, and the UE may follow the periodicPHR on the current uplink component carrier according to the protocol. -Timer to calculate, for example, the UE can determine that periodicUEPHR-Timer is on each component carrier The minimum value of periodicPHR-Timer (in this embodiment, the value of periodicPHR-Timer on CC1 and CC2 is the same, so it is 20ms) or the greatest common divisor (in this embodiment, the values of periodicPHR-Timer on CC1 and CC2 are the same. So for 20ms).

In addition, it can be further restricted that if the periodicUEPHR-Timer times out, the prohibit PHR-Timer is running on any CC, and the PHR is not triggered.

Or, when the UE needs to report the PHR of any CC, it is evaluated that when the sum of the transmit powers of all the uplink component carriers exceeds the threshold (such as 18 dbm or 5 db), the PHRs of all CCs are reported at the same time. The follow-up process is the same.

4 is a schematic diagram of triggering and reporting of a PHR according to Embodiment 3 of the present invention. As shown in FIG. 4, at time T1, periodicUEPHR-Timer times out, the UE detects that the sum of transmit powers on CC1 and CC2 exceeds I8dbm, and triggers CC1 and CC2 simultaneously. PHR;

At time T3, periodicUEPHR-Timer times out, the UE detects that the sum of the transmit powers on CC1 and CC2 exceeds I8dbm, and triggers the PHR of CC1 and CC2;

At time T4, periodicUEPHR-Timer times out, and the UE detects that the sum of the transmit powers on CC1 and CC2 does not exceed 18dbm, and does not trigger PHR;

At time T5, the UE receives the uplink grant of CC2, and transmits the PHR of CC1 and CC2 on CC2, and the periodicPHR-Timer and prohibitPHR-Timer of CC1 and CC2 are restarted.

At time T6 and T7, the periodicUEPHR-Timer times out, and the UE detects that the sum of the transmit powers on CC1 and CC2 does not exceed 18dbm, and does not trigger PHR.

Claims

Claim

A method for transmitting a power headroom report, characterized in that a threshold for simultaneously reporting a power headroom report PHR of each component carrier is set in advance, the method comprising:

2. The method according to claim 1, wherein the threshold of the PHR that simultaneously triggers each component carrier is set to an absolute value or a relative value.

The method according to claim 1, wherein the UE determines whether the sum of the transmission powers of the respective component carriers exceeds the preset threshold: the UE performs real-time on each component.

The method according to claim 1, wherein the UE determines whether the sum of the transmission powers of the respective component carriers exceeds the preset threshold: when the PHR of any component carrier needs to be reported, Whether the sum of the transmission powers of the component carriers exceeds the preset threshold is determined.

The method according to claim 1, wherein the method further comprises: setting a PHR detection period of the UE,

The method according to claim 5, wherein the PHR detection period of the UE is set by the base station, and the UE is notified by using RRC signaling; or is obtained by the UE.

The method according to claim 6, wherein the method further comprises: setting a PHR period reporting timer of each component carrier, The UE calculates the PHR detection period of the UE as follows: The UE determines that the minimum value or the greatest common divisor of the PHR period reporting timer on each component carrier is the PHR detection period of the UE.

The method according to any one of claims 1 to 7, wherein the UE sends the PHR of each component carrier to the base station according to the received uplink grant from the base station:

The method according to any one of claims 1 to 7, wherein the component carrier is a configured uplink component carrier; or, is a configured and activated uplink component carrier.

A transmitting system for a power headroom report, the system comprising a base station and a UE;

The system according to claim 10, wherein the preset threshold is an absolute value or a relative value.

The system according to claim 10, wherein the UE determines whether the sum of the transmission powers of the respective component carriers exceeds the preset threshold: the UE performs real-time pairs

13. The system according to claim 10, wherein the UE determines each point Whether the sum of the transmit powers of the quantity carriers exceeds the preset threshold is: When the PHR of any component carrier needs to be reported, whether the sum of the transmit powers of the respective component carriers exceeds the preset threshold is determined.

The system according to claim 10, wherein the UE determines whether the sum of the transmission powers of the respective component carriers exceeds the preset threshold: according to the PHR detection period of the UE.

15. The system of claim 14 wherein:

The UE is further configured to calculate a PHR detection period of the UE.

16. The system of claim 15 wherein:

The system according to any one of claims 10 to 16, wherein the UE sends the PHR of each component carrier to the base station according to the received uplink grant from the base station:

If the UE receives the uplink grant of more than one but not all of the component carriers at the same time, the PHR of the component carrier that has not received the uplink grant is sent according to a certain rule or random, while transmitting its own PHR on the component carrier that receives the uplink grant. The component carrier allocated to the uplink grant is allocated for transmission.

The system according to any one of claims 10 to 16, wherein the component carrier is a configured uplink component carrier; or, is a configured and activated uplink component carrier.