CN111436070B - Method for reporting power headroom - Google Patents

Abstract

The application discloses a method for reporting power headroom, which is used for terminal equipment and is characterized in that N reported PUSCHs are contained in a time unit, wherein N is more than or equal to 2; the reported PUSCH is used for sending a power headroom report; the power headroom report comprises power headroom values of M carriers, and the time unit is a time unit of a timer triggering the power headroom report, wherein N is more than or equal to 2, and M is more than or equal to 2. The application also comprises a terminal device using the method. By using the method and the terminal equipment, the transmission efficiency of the PHR can be improved, and the scheduling accuracy of the network equipment can be improved.

Description

A method for reporting power headroom

technical field

The present application relates to the field of mobile communication technologies, and in particular, to a method and apparatus for reporting the power headroom of a terminal device.

Background technique

While controlling the uplink transmission power of the terminal device, the network device receives a power headroom report (PHR, Power Headroom Report) from the terminal device. The terminal device sends the PHR through the MAC CE, including the PH value. PH indicates how much headroom is available on the current carrier in addition to the PUSCH transmission power. The PH value can be used as a reference for network equipment to allocate uplink resource blocks. If the PH value is negative, it means that the current PUSCH transmission power has exceeded the maximum transmission power allowed by the terminal equipment, and the resource block allocation of the terminal equipment can be reduced in the next scheduling; If the PH value is positive, the number of subsequently allocated resource blocks may be increased.

In the prior art, the terminal device only reports the PHR once after triggering the PHR reporting and meeting the PHR reporting conditions; the terminal device restarts the timer after triggering the PHR reporting and meeting the PHR reporting conditions. That is, after the reporting of the PHR is triggered, the PHR is transmitted in one PUSCH, then the timer is restarted, and the PHR is reported after the next trigger condition is met.

Taking the PUSCH carrying the PHR as the "reported PUSCH" and the PUSCH used as the basis for the carrier power calculation as the "target PUSCH", when calculating the PH of each carrier in the PHR, the scheduling indication information of the target PUSCH must be no later than the scheduling of the reported PUSCH. Instructions. If the subcarrier spacing of the target carrier is greater than the subcarrier spacing of the first carrier, and the target PUSCH is located in the first time slot among the multiple time slots that overlap with the reported PUSCH, the real power value of the target PUSCH can be used to calculate the carrier PH value. With the prior art solution, the terminal device can only calculate the PH value based on the assumed power value for some carriers. Therefore, the efficiency of sending the PHR by the terminal device is low, which affects the scheduling accuracy of the network device.

The invention solves the problems that when the scheduling indication information is later than the scheduling indication information of the reported PUSCH, the target PUSCH cannot be used to calculate the power headroom based on the real power value, and the efficiency of the terminal equipment sending PHR is low, which affects the scheduling accuracy of the network equipment.

SUMMARY OF THE INVENTION

The embodiments of the present application provide a power headroom reporting method and terminal device, which solve the problems of poor scheduling accuracy and low efficiency of network devices.

A method for reporting power headroom, used for terminal equipment, comprising the following steps: including N reporting PUSCHs in one time unit; the reporting PUSCH is a PUSCH used for sending a power headroom report; the power headroom report , which includes the power headroom values of M carriers, and the time unit is the time unit of the timer for triggering the power headroom report, where N≥2 and M≥2.

Preferably, the N reported PUSCHs are located on different carriers and or at different time positions.

Further preferably, the terminal device restarts the timer when the time unit ends.

Preferably, the conditions for triggering the power headroom reporting include: timer timeout.

According to the method described in any one of the embodiments of the present application, the i-th of the N reported PUSCHs is located on the first carrier, and the power headroom of the first carrier is calculated by using the real power value of the i-th reported PUSCH value; calculate the power headroom value of the Kth carrier with the real power value of the target PUSCH, where the target PUSCH is located on the Kth carrier, or use the assumed power value to calculate the power headroom value of the Kth carrier.

Based on the above method, preferably, the target PUSCH is the PUSCH in the first time slot in the Kth carrier that overlaps with the time slot where the reported PUSCH is located.

Further preferably, if the terminal device does not send PUSCH in the target time slot of the Kth carrier, use the assumed power value to calculate; if the terminal device contains L PUSCHs in the target time slot of the Kth carrier, L ≥ 1, there are P known PUSCHs in the L real PUSCHs, and P ≤ L, the known PUSCH is that its corresponding uplink scheduling indication reception time is not later than the uplink corresponding to the i-th reported PUSCH Scheduling indication reception time; if P=0, the assumed power value is used for calculation; if P>0, the target PUSCH is a known PUSCH, and the actual power value of the target PUSCH is used for calculation.

Preferably, in the method of the present application, if the receiving time of the uplink scheduling indication corresponding to the target PUSCH is not later than the receiving time of the uplink scheduling indication corresponding to the reported PUSCH.

Preferably, in the method of the present application, the number of carriers using the real power value for the N reported power headroom values in the PUSCH is more than the number of carriers using the real power value for the power headroom value in any one PUSCH.

The present application further provides a terminal device, which is used for the method described in any one of the embodiments of the present application. The terminal equipment is used to trigger a power headroom report; the terminal equipment is used to send a power headroom report in the N reported PUSCHs within the time unit; the power headroom report includes multiple carriers power headroom value.

Preferably, the terminal device further includes a timer, and the timer includes periodicPHR-Timer and or prohibitPHR-Timer, which are used to trigger power headroom reporting.

The above-mentioned at least one technical solution adopted in the embodiments of the present application can achieve the following beneficial effects:

After triggering PHR reporting and satisfying the PHR reporting condition in the first time unit, the terminal device restarts the periodicPHR-Timer and prohibitPHR-Timer timers at the end time of the first time unit. In the first time unit, the terminal device may send a PHR MAC CE at each of the N reported PUSCHs, where N is greater than or equal to 2. Any two of the N reported PUSCHs are located on different carriers within the first time unit or at different time positions within the first time unit. In this way, the transmission efficiency of the PHR can be improved, and the scheduling accuracy of the network equipment can be improved.

Description of drawings

The drawings described herein are used to provide further understanding of the present application and constitute a part of the present application. The schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application. In the attached image:

Fig. 1 is the embodiment flow chart of the method of the present invention;

FIG. 2 is a schematic diagram of a reported PUSCH and a target PUSCH.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present application clearer, the technical solutions of the present application will be clearly and completely described below with reference to the specific embodiments of the present application and the corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

Referring to Chapter 7 of 3GPP TS 38.213 Vf30 and 3GPP TS 38.101-2 Vf30, for an active cell, whether the PHR of the serving cell determined by the terminal equipment is based on the actual power value or the assumed power value:

Based on the real power value, the power headroom is calculated as: carrier maximum power value - real power value.

For example, the terminal device calculates the PH [dB] of the PUSCH transmission time i on the uplink bandwidth part b of the serving cell c of the frequency f in the following manner:

Based on the assumed power value, the power headroom is calculated as: carrier maximum power value - assumed power value.

For example, the terminal device calculates the PH of the PUSCH transmission time i on the uplink bandwidth part b of the serving cell c of the frequency f in the following manner:

的计算按照假设MPR＝0dB，A-MPR＝0dB，P-MPR＝0dB，TC ＝0dB。P_{O_PUSCH,b,f,c}(j)和α_b,f,c(j)是频率f的服务小区c的上行带宽部分b对应的高层信令p0-PUSCH-AlphaSetId＝0对应的取值，PL_b,f,c(q_d)是用高层信令 PathlossReferenceRS-Id＝0和l＝0对应的路径损耗值。针对一个激活小区，终端设备发送的PHR MAC CEs中关于该激活小区的PHR包括：标识PH值基于真实功率值还是假定功率值，P_CMAX，f，c，

及PH值。显然，基于真实功率值的PH值相比基于假定功率值的PH值对于网络设备后续调度上行传输的参考意义更大。in

The calculation is based on the assumption that MPR=0dB, A-MPR=0dB, P-MPR=0dB, TC=0dB. P _{O_PUSCH,b,f,c} (j) and α _b,f,c (j) are the values corresponding to the high-level signaling p0-PUSCH-AlphaSetId=0 corresponding to the uplink bandwidth part b of the serving cell c of the frequency f, PL _b,f,c (q _d ) is the path loss value corresponding to higher layer signaling PathlossReferenceRS-Id=0 and l=0. For an activated cell, the PHR about the activated cell in the PHR MAC CEs sent by the terminal device includes: identifying whether the PH value is based on the real power value or the assumed power value, P _{CMAX, f, c} ,

and pH value. Obviously, the PH value based on the real power value has a greater reference significance for the subsequent scheduling of uplink transmission by the network device than the PH value based on the assumed power value.

In the prior art, the parameters of timer and power change threshold (eg prohibitPHR-Timer, periodicPHR-Timer and phr-Tx-PowerFactorChange) are uniformly configured for multiple cells in carrier aggregation. As long as any cell in the carrier aggregation cell group satisfies the triggering condition of the PHR, the terminal device considers that the PHR has been triggered. The PHR MAC CE reported by the terminal equipment includes the PHs corresponding to all activated carriers in the cell group. After the terminal device triggers PHR reporting, if it detects that DCI format 0_0 or DCI format 0_1 schedules a transport block for transmission on the PUSCH, the PH value is obtained from the physical layer; based on the PH value, a PHR control unit is generated to send on the PUSCH, and restart timer.

With the power headroom reporting method and terminal device of the present invention, the terminal device determines that the time unit satisfies the condition for sending PHR; the terminal device sends N PHR MAC CEs through N reporting PUSCHs in the time unit, and the Any two of the N reported PUSCHs are different carriers in the time unit and or different time positions in the first time unit; the terminal device restarts the timer when the time unit ends.

The technical solutions provided by the embodiments of the present application will be described in detail below with reference to the accompanying drawings.

FIG. 1 is a flow chart of an embodiment of the method of the present invention. A method for reporting power headroom, used for terminal equipment, includes the following steps 10-30.

Step 10. Trigger power headroom reporting;

For example, the condition for triggering the power headroom reporting includes: the timer expires.

For example, the terminal device satisfies the PHR triggering condition in the first time unit. The network device configures timer and power change threshold parameters for the terminal device. For example, the network equipment configures the terminal equipment with the parameters prohibitPHR-Timer, periodicPHR-Timer and phr-Tx-PowerFactorChange.

For example, if the following conditions are met, the terminal device triggers PHR reporting: (1) the prohibitPHR-Timer timer expires, and the change value of the path loss exceeds phr-Tx-PowerFactorChange dB; (2) the periodicPHR-Timer timer expires. The value units of prohibitPHR-Timer and periodicPHR-Timer are both subframes. As a time unit, for example, sf500 represents 500 subframes. Referring to Chapter 7 of 3GPP TS 38.213 Vf30 and 3GPP TS 38.101-2 Vf30, the terminal equipment has other conditions for triggering PHR reporting.

Step 20, the terminal equipment reports N PUSCHs in one time unit and sends the PHR;

One time unit includes N reporting PUSCHs; the reporting PUSCH is a PUSCH used to send a power headroom report; the power headroom report includes the power headroom values of M carriers, and the time unit is the trigger power The time unit of the timer for margin reporting, where N≥2 and M≥2.

Preferably, the N reported PUSCHs are located on different carriers and or at different time positions. Any two of the N reported PUSCHs are located on different carriers or at different time positions. For example, the N reported PUSCHs are located at different time positions on the same carrier, or the N reported PUSCHs are located on different carriers, or the N reported PUSCHs are located on different carriers and different time positions.

For example, when there is an uplink resource bearing the MAC CE in the first time unit, the terminal device determines that the first time unit satisfies the condition for sending the PHR.

When the terminal device is configured with carrier aggregation, within the first time unit, the terminal device sends a PHR MAC CE in each of the N reported PUSCHs. Any two of the N reported PUSCHs may be located on different carriers, or located at different time positions on the same carrier.

For example, if carrier X includes PUSCH-A, carrier Y includes PUSCH-B and PUSCH-C, and carrier Z includes PUSCH-D and PUSCH-E, it can be used to report PUSCH including:

Table 1. PUSCH-A~E are used as the PH value carried when reporting PUSCH

Among them, for the carrier where the PUSCH is reported, the power headroom value of the carrier is calculated with the transmission power of the real PUSCH; for the carrier other than the reported PUSCH, the power headroom value of the carrier is calculated with the real PUSCH power or the assumed power value (further Also, how to determine whether to use the transmission power of the real PUSCH to calculate the power headroom value or to use the assumed value to calculate the power headroom value, see the embodiment shown in FIG. 2 ).

Preferably, in the method of the present application, the power headroom values in the N reported PUSCHs are the number of carriers calculated by using the real power values, and the power headroom values in the N reported PUSCH values are more than any one using the real PUSCH power value. Calculated number of carriers.

Step 30: The terminal device releases the triggering power headroom reporting condition.

Further preferably, the terminal device restarts the timer when the time unit ends.

It should be noted that, according to the prior art, after triggering PHR reporting and satisfying the PHR reporting conditions, the terminal device only reports the PHR once, that is, restarts the periodicPHR-Timer and prohibitPHR-Timer timers. Therefore, it is not supported for the terminal device to send the MAC CE of multiple PHRs in one subframe.

According to the solution of step 30 of the present invention, the terminal device restarts the periodicPHR-Timer and the prohibitPHR-Timer at the end time of the first time unit for sending the PHR. In the first time unit, the terminal device keeps meeting the conditions for PHR reporting.

FIG. 2 is a schematic diagram of a reported PUSCH and a target PUSCH.

According to the method described in any one of the embodiments of this application, the power headroom value of the first carrier is calculated by the real power value of the reported PUSCH; the first carrier is the carrier where the reported PUSCH is located.

For example, the ith of the N reported PUSCHs is located on the first carrier, and the real power value of the ith reported PUSCH is used to calculate the power headroom value of the first carrier in the ith reported PUSCH; use The target PUSCH calculates the power headroom value of the Kth carrier in the ith reported PUSCH, the target PUSCH is located on the Kth carrier, and the ith report is calculated by using the actual power value or assumed power value of the target PUSCH The power headroom value of the Kth carrier in the PUSCH (K≤M).

The target PUSCH is the PUSCH in the first time slot in the Kth carrier that overlaps with the time slot where the reported PUSCH is located.

It is defined that the target PUSCH is located in the target time slot of the Kth carrier.

For example, the subcarrier spacing of the Kth carrier is not greater than the subcarrier spacing of the first carrier, and the target time slot overlaps with the time slot where the ith reported PUSCH is located on the first carrier; for example, , the subcarrier spacing of the Kth carrier is greater than the subcarrier spacing of the first carrier, and the target time slot is a plurality of timeslots overlapping with the time slot where the ith reported PUSCH is located on the first carrier the first slot in the slot.

It should be noted here that, in the R15 system, the durations of one symbol corresponding to different subcarrier intervals are different. The larger the carrier spacing, the smaller the duration of a single symbol. However, no matter what the subcarrier spacing is, one time slot is composed of 14 symbols, and the time slot lengths of carriers with different subcarrier spacings are different.

It should be noted that the NR system supports a variety of parameter sets (numerology). Each parameter set corresponds to a subcarrier spacing size and a cyclic prefix size. The length of one time unit (or subframe) in the system is 1 ms. Corresponding to different parameter sets, the time length of a time slot is different. Correspondingly, one subframe includes different numbers of time slots for different parameter sets. Each time slot includes 14 symbols, but the symbol lengths corresponding to different parameter sets are different. If the parameter sets of multiple cells in carrier aggregation are different, the length of the time slot where the PUSCH reported by the PHR is located is different from the length of the time slot where the target PUSCH located on other carriers is located.

As shown in FIG. 2 , carrier X corresponds to parameter set configuration X; carrier Y corresponds to parameter set configuration Y; carrier Z corresponds to parameter set configuration Z. The length of one time slot of parameter set configuration X is 1ms, the length of one time slot of parameter set configuration Y is 0.5ms, and the length of one time slot of parameter set configuration Z is 0.25ms.

On the basis of the above method, preferably, the power headroom value of the Kth carrier is calculated using the actual power value of the target PUSCH, or is calculated using the assumed power value.

For example, if the terminal device contains L PUSCHs in the target time slot of the Kth carrier, L≥1, and there are P known PUSCHs in the L real PUSCHs, P≤L, the known PUSCHs , is that its corresponding uplink scheduling indication reception time is not later than the uplink scheduling indication reception time corresponding to the i-th reported PUSCH; if P=0, it is calculated with the assumed power value; if P>0, the target PUSCH is A known PUSCH, calculated with the real power value of the target PUSCH.

For example, taking Fig. 2 as an example, when carrier X is the first carrier and carrier Y is the target carrier, then slot #i is the target time slot, the number of PUSCHs in the target time slot is L=1, and the number of known PUSCHs P=0 .

For another example, taking FIG. 2 as an example, when carrier Y is the first carrier and carrier X is the target carrier, then slot#j is the target time slot, the number of PUSCHs in the target time slot is L=1, and the known number of PUSCHs P= 1.

It should be noted that the target time slot may include one or more PUSCHs. When the target time slot contains multiple known PUSCHs, the target PUSCH is the PUSCH with the earliest start time or the earliest end time in the target time slot. Alternatively, the target PUSCH is the first PUSCH in the target time slot.

For another example, if the terminal device does not transmit the PUSCH in the target time slot of the Kth carrier, use the assumed power value to calculate.

用

计算功率余量值。It can also be considered that the assumed power value is the "assumed" power value of the target PUSCH in the target time slot. The "assumed" target PUSCH may be defined according to a preset rule, which is not specifically limited here. As an example, it can be calculated with reference to the assumption MPR=0dB, A-MPR=0dB, P-MPR=0dB, TC=0dB described in Chapter 7 of 3GPP TS 38.213 Vf30

use

Calculate the power headroom value.

Assuming that the terminal device sends PHR on PUSCH-A of carrier X, according to the prior art, the following constraints are imposed on the corresponding PH of each carrier:

If there are multiple time slots that other carriers overlap with the time slot where the PUSCH reporting PHR is located (for example, time slot #j of carrier X overlaps time slots #i and #i+1 of carrier Y, and time slot #j of carrier Z overlaps with the time slot of carrier Z) #k, #k+1, #k+2, #k+3 overlap), then the PH values of other carriers only consider the first time slot (the PH of carrier Y is based on the real power value of PUSCH of time slot #i or assumed Power value calculation, the PH of carrier Z is calculated with the PUSCH real power value or assumed power value of time slot #k). In the above figure, although time slots #k+1 and #k+2 of carrier Z have PUSCH-D and PUSCH-E transmissions, respectively, the PH of carrier Z can only be calculated with the assumed power value of time slot #k.

If the uplink scheduling indication corresponding to the PUSCH on the other carrier is later in time than the uplink scheduling indication corresponding to the PUSCH reporting the PHR, the PUSCH on the other carrier is not considered in the PH calculation. As shown in FIG. 2 , the scheduling time T1 (located in Slot #i-n1 ) corresponding to PUSCH-B in time slot #i of carrier Y is after the scheduling time T0 (located in Slot #j-n0 ) corresponding to PUSCH-A. When the terminal device receives the scheduling indication information for scheduling PUSCH-A, it has not yet received the scheduling indication information for PUSCH-B. Therefore, when composing PUSCH-A data packets, it cannot be calculated by using the power value (real power value) of PUSCH-B. The PH value corresponding to carrier Y can only be calculated by using the assumed power value.

If the uplink scheduling indication corresponding to the PUSCH on the other carrier is earlier in time than the uplink scheduling indication corresponding to the PUSCH reporting the PHR, it also depends on whether the PUSCH on the other carrier is in the target time slot. As shown in FIG. 2 , the scheduling time T2 (located in Slot #k-n2 ) corresponding to PUSCH-D in time slot #k of carrier Z is before the scheduling time T0 (located in Slot #j-n0 ) corresponding to PUSCH-A. When the terminal device receives the scheduling indication information for scheduling PUSCH-A, it has already received the scheduling indication information for PUSCH-D, but since the time slot where PUSCH-D is located is slot#k+1, not the target time slot slot#k, it cannot be used. Use the power value of PUSCH-D to calculate the PH value corresponding to carrier Z; since there is no known PUSCH in the target time slot slot#k, only the assumed power value can be used to calculate the PH value corresponding to carrier Z.

Among the PHRs that can be carried on these PUSCHs, the calculation of the PH value for each carrier is shown in the following table:

Table 2. PH calculation of carrier X/Y/Z

If the terminal device only transmits PHR on PUSCH-A of carrier X, the PH of carrier Z and carrier 3 can only be calculated with assumed power values. When the terminal device receives the scheduling indication information of PUSCH-A, it does not know that PUSCH-B and PUSCH-C need to be sent subsequently. It is also uncertain that sending PHR on PUSCH-C can carry the PH calculated based on the real power value for all carriers. When PUSCH-A is used as the reporting PUSCH, correspondingly, the carrier X is the first carrier. At this time, the target time slot on carrier Y is slot#i, and the target time slot on carrier Z is slot#k.

According to the solution of the present invention, in addition to the PUSCH-A of the carrier X, the terminal equipment can also send the PHR on the PUSCH-C of the carrier Y, and the PH value for the carrier Y in the PHR can be calculated based on the real power value (PUSCH-C). When PUSCH-B or PUSCH-C is used as the reported PUSCH, correspondingly, carrier Y is the first carrier. For example, when PUSCH-B is used as the reporting PUSCH, the target time slot on carrier X is slot#j, and the target time slot on carrier Z is slot#k.

The PH value for carrier Z can also be calculated based on the true power value (PUSCH-E). This is because PUSCH-E is the PUSCH in the first time slot #k+2 in the time slots #k+2 and #k+3 overlapping the time slot #i+1 in which the PUSCH-C is located on the carrier Z. When PUSCH-D or PUSCH-E is used as the reported PUSCH, correspondingly, carrier Z is the first carrier. For example, when PUSCH-E is used as the reporting PUSCH, the target time slot on carrier X is slot#j, and the target time slot on carrier Y is slot#i+1.

In this way, the network device can obtain, for example, the PH values of carrier Y and carrier Z calculated based on the real power values through the PHR in the PUSCH-C of carrier Y.

Preferably, in the method of the present application, the number of carriers using the real power value for the N reported power headroom values in the PUSCH is more than the number of carriers using the real power value for the power headroom value in any one PUSCH.

For example, two PUSCHs are reported, namely PUSCH-B and PUSCH-D. When PUSCH-B is used as the reporting PUSCH, the real power value of PUSCH-A and the real power value of PUSCH-B are used to calculate the power headroom of carrier X and carrier Y respectively, and the number of carriers using the real power value is 2. When PUSCH-D is used as the reporting PUSCH, the real power value of PUSCH-D is used to calculate the power headroom of carrier 3, and the number of carriers using the real power value is 1. In this way, the number of two carriers for reporting the real power value for the PUSCH is three, which is more than the number of any one carrier for reporting the real power value for the power headroom value in the PUSCH.

The terminal device can determine the value of N according to the time relationship between the scheduled PUSCHs on each carrier in the first time unit, and according to the time sequence relationship of the scheduling indication information corresponding to the scheduled PUSCHs, and determine which N The PUSCH sends the PHR MAC CE to ensure that the network device obtains as many PH values calculated based on the real power value as possible, and meets the needs of the network device to effectively schedule the uplink transmission of the terminal device. For a parameter set with a large carrier interval, one time slot is short, and one time unit includes multiple time slots. Sending the PHR by the terminal device on the PUSCH at multiple time positions within the first time unit can also ensure that the network device obtains as many PH values calculated based on the real power value as possible.

The present application further provides a terminal device, which is used for the method described in any one of the embodiments of the present application. The terminal equipment is used to trigger a power headroom report; the terminal equipment is used to send a power headroom report in the N reported PUSCHs in the time unit; the power headroom report includes M carriers power headroom value.

Preferably, the terminal device further includes a timer.

For example, the timer includes a first timer and/or a second timer, and the conditions for triggering the power headroom reporting include any one or more of the following:

The first timer expires, and the variation of the path loss of at least one active serving cell in the reference MAC entity used to calculate the path loss since the last time the power headroom is transmitted is greater than the first threshold, and there is a user in the MAC entity. Uplink resources for initial transmission of data blocks;

The first timer expires, and the variation of the path loss of at least one activated serving cell in the reference MAC entity used to calculate the path loss from the last time the power headroom is transmitted is greater than the first threshold;

The first timer expires, and since the last time the power headroom is transmitted, the power backoff variation required by at least one activated serving cell in the reference MAC entity used to calculate the path loss is greater than the first threshold;

The second timer times out.

For example, the timers include a first timer periodicPHR-Timer and or a second timer prohibitPHR-Timer, which are used to trigger power headroom reporting.

As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects.

It should also be noted that the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a series of elements includes not only those elements, but also Other elements not expressly listed, or which are inherent to such a process, method, article of manufacture, or apparatus are also included. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in the process, method, article of manufacture, or device that includes the element.

The above descriptions are merely examples of the present application, and are not intended to limit the present application. Various modifications and variations of this application are possible for those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the scope of the claims of this application.

Claims (7)

1. A method for reporting power headroom is used for a terminal device and is characterized in that,

the method comprises the steps that N reported PUSCHs are contained in one time unit;

the reported PUSCH is used for sending a power headroom report;

the power headroom report comprises power headroom values of M carriers, and the time unit is a time unit of a timer triggering the power headroom report, wherein N is more than or equal to 2, and M is more than or equal to 2.

2. The method of claim 1,

the N reported PUSCHs are located at different time positions of the same carrier, or,

the N reported PUSCHs are located on different carriers, or,

and the N reported PUSCHs are positioned at different carriers and different time positions.

3. The method of claim 1,

and the terminal equipment restarts the timer for triggering the reporting of the power headroom when the time unit is finished.

4. The method according to any one of claims 1 to 3,

the Timer comprises a first Timer periodicPHR-Timer and/or a second Timer prohibitpyr-Timer, and the condition for triggering the reporting of the power headroom comprises any one or more of the following conditions:

the first timer is overtime, and after the power headroom is sent last time, the variation of the path loss of at least one activated serving cell in a reference MAC entity for calculating the path loss is larger than a first threshold, and uplink resources for the initial transmission of the data block exist in the MAC entity;

the first timer is overtime, and the variation of the path loss of at least one activated serving cell in a reference MAC entity for calculating the path loss is larger than a first threshold after the power headroom is sent last time;

the first timer is overtime, and after the power margin is sent last time, the power back-off variation quantity required by at least one activated service cell in the reference MAC entity for calculating the path loss is larger than the first threshold;

the second timer times out.

5. The method according to any one of claims 1 to 3,

the first of the N reported PUSCHsiIs located in a first carrier wave, using said second carrier waveiCalculating the power margin value of the first carrier according to the real power value of the reported PUSCH;

and calculating the power margin value of the K carrier wave by using the real power value of a target PUSCH (physical uplink shared channel), wherein the target PUSCH is positioned in the K carrier wave, or calculating the power margin value of the K carrier wave by using an assumed power value (K is less than or equal to M).

6. The method of claim 5,

the target PUSCH is positioned in a target time slot of the Kth carrier;

the target timeslot is not greater than the first carrier's subcarrier spacing if the K carrier's subcarrier spacing is not greater than the first carrier's subcarrier spacingiThe reported PUSCH is overlapped in the time slot of the first carrier;

the target timeslot is the same as the first timeslot if the subcarrier spacing of the Kth carrier is greater than the subcarrier spacing of the first carrieriAnd reporting the first time slot of a plurality of time slots of the PUSCH in which the time slot of the first carrier is overlapped.

7. The method of claim 6,

if the terminal equipment does not send PUSCH in the target time slot of the Kth carrier wave, calculating by using an assumed power value;

if the terminal equipment comprises L PUSCHs in the target time slot of the Kth carrier wave, L is more than or equal to 1, P known PUSCHs exist in the L real PUSCHs, P is less than or equal to L, and the receiving time of the uplink scheduling indication corresponding to the known PUSCHs is not later than that of the Kth carrier waveiReport to the userReceiving time of uplink scheduling indication corresponding to the PUSCH; if P =0, calculating by using the assumed power value; if P>And 0, the target PUSCH is a known PUSCH and is calculated by using the real power value of the target PUSCH.

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