CN111436070B - Method for reporting power headroom - Google Patents

Method for reporting power headroom Download PDF

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CN111436070B
CN111436070B CN201910028111.6A CN201910028111A CN111436070B CN 111436070 B CN111436070 B CN 111436070B CN 201910028111 A CN201910028111 A CN 201910028111A CN 111436070 B CN111436070 B CN 111436070B
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pusch
carrier
timer
puschs
power
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CN111436070A (en
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闫志宇
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/08—Testing, supervising or monitoring using real traffic
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

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

Method for reporting power headroom
Technical Field
The present application relates to the field of mobile communications technologies, and in particular, to a method and an apparatus for reporting a power headroom of a terminal device.
Background
The network device receives a Power Headroom Report (PHR) from the terminal device while controlling the uplink transmission Power of the terminal device. The terminal equipment transmits PHR through MAC CE, including 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 basis for allocating uplink resource blocks by the network equipment, if the PH value is negative, the current PUSCH transmission power is shown to exceed 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 is positive, the number of subsequently allocated resource blocks may be increased.
In the prior art, after triggering the reporting of the PHR and meeting the reporting condition of the PHR, the terminal equipment only reports the PHR once; and after triggering the PHR report and meeting the PHR report condition, the terminal equipment restarts the timer. That is, after reporting the PHR is triggered, the PHR is transmitted in one PUSCH, and then the timer is restarted to wait for reporting the PHR again when the trigger condition is met next time.
The method comprises the steps that a PUSCH bearing a PHR is used as a 'reporting PUSCH', a PUSCH used as a basis for calculating carrier power is used as a 'target PUSCH', and when the PH of each carrier in the PHR is calculated, scheduling indication information of the target PUSCH is not later than that of the reporting PUSCH necessarily. And if the subcarrier interval of the target carrier is larger than that of the first carrier, and the target PUSCH is positioned in the first time slot of the plurality of time slots overlapped with the reported PUSCH, the real power value of the target PUSCH can be used for calculating the PH value of the carrier. By adopting the prior art scheme, the terminal equipment 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, and the scheduling accuracy of the network device is affected.
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 can not be used for calculating the power margin based on the real power value, the efficiency of the terminal equipment for sending the PHR is low, and the scheduling accuracy of the network equipment is influenced.
Disclosure of Invention
The embodiment of the application provides a method for reporting power headroom and a terminal device, and solves the problems of poor scheduling accuracy and low efficiency of network devices.
A method for reporting power headroom is used for terminal equipment and comprises the following steps: 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.
Preferably, the N reported PUSCHs are located on different carriers and/or at different time positions.
Further preferably, the terminal device restarts the timer at the end of the time unit.
Preferably, the condition for triggering the reporting of the power headroom includes: the timer times out.
According to the method of any embodiment of the present application, an ith bit of the N reported PUSCHs is located on a first carrier, and a power headroom value of the first carrier is calculated by using a real power value of the ith reported PUSCH; and calculating the power margin value of the K carrier wave by using the real power value of a target PUSCH, 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.
On the basis of the above method, preferably, the target PUSCH is a PUSCH in a first slot in the kth carrier that overlaps with a slot in which the reported PUSCH is located.
Further preferably, if the terminal device does not transmit PUSCH in the target slot of the kth carrier, calculating with an assumed power value; if the terminal equipment contains L PUSCHs in the target time slot of the Kth carrier wave, wherein 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 known PUSCHs is not later than that of the uplink scheduling indication corresponding to the ith reported PUSCH; if P is 0, calculating by using the assumed power value; if P is greater than 0, the target PUSCH is a known PUSCH and is calculated by using the real power value of the target PUSCH.
Preferably, in the method of the present application, if the uplink scheduling indication receiving time corresponding to the target PUSCH is not later than the uplink scheduling indication receiving time corresponding to the reported PUSCH.
Preferably, in the method of the present application, the number of carriers with the true power value for the power headroom value in the N reported PUSCHs is greater than the number of carriers with the true power value for the power headroom value in any 1 PUSCH.
The application also provides a terminal device for the method in any one of the embodiments of the application. The terminal equipment is used for triggering the reporting of the power headroom; the terminal device is configured to send a power headroom report in N reported PUSCHs in the time unit; the power headroom report includes power headroom values of a plurality of carriers.
Preferably, the terminal device further includes a Timer, where the Timer includes periodicPHR-Timer and/or prohibitpyr-Timer, and is used to trigger power headroom reporting.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects:
after triggering the PHR report and meeting the PHR report condition in the first time unit, the terminal equipment restarts the periodicPHR-Timer and the prohibitPHR-Timer at the end time of the first time unit. In the first time unit, the terminal device may transmit the PHR MAC CE at each of N reported PUSCHs, where N is greater than or equal to 2. Any two of the N reported PUSCHs are located at different carriers within the first time unit and/or at different time positions within the first time unit. Therefore, the transmission efficiency of the PHR can be improved, and the scheduling accuracy of the network equipment can be improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
FIG. 1 is a flow chart of an embodiment of the method of the present invention;
fig. 2 is a schematic diagram of reporting PUSCH and target PUSCH.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort belong to 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, the PHR of the serving cell determined by the terminal device is based on the true power value or on the assumed power value:
based on the true power value, the power headroom is calculated as: carrier maximum power value-true power value.
For example, the terminal device calculates PH [ dB ] of the PUSCH transmission time i on the uplink bandwidth part b of the serving cell c at the frequency f in the following manner:
Figure BDA0001943248240000041
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 with the frequency f in the following manner:
Figure BDA0001943248240000042
wherein
Figure BDA0001943248240000043
The calculation of (c) is based on the assumption that MPR is 0dB, a-MPR is 0dB, P-MPR is 0dB, and TC is 0 dB. PO_PUSCH,b,f,c(j) And alphab,f,c(j) Is the value corresponding to the higher layer signaling p0-PUSCH-AlphaSetId ═ 0 corresponding to the uplink bandwidth part b of the serving cell c with the frequency f, PLb,f,c(qd) The path loss values are corresponding to the upper layer signaling PathlossReferenceRS-Id of 0 and l of 0. For an active cell, the PHR of the PHR MAC CEs sent by the terminal device for the active cell includes: identifying whether the PH value is based on a true power value or an assumed power value, PCMAX，f，c，
Figure BDA0001943248240000044
And pH. Obviously, the PH value based on the real power value is more meaningful to the network device to subsequently schedule uplink transmission than the PH value based on the assumed power value.
In the prior art, the parameters of the Timer and the power change threshold (such as prohibitPHR-Timer, periodicPHR-Timer and phr-Tx-powerfactory change) are uniformly configured for a plurality of cells of carrier aggregation. And the terminal equipment considers that the PHR is triggered as long as any one cell in the cell group of the carrier aggregation meets the triggering condition of the PHR. And the PHR MAC CE reported by the terminal equipment comprises the PHs corresponding to all activated carriers in the cell group. After triggering PHR report, if DCI format 0_0 or DCI format 0_1 is detected to schedule a transmission block to transmit on a PUSCH, acquiring a PH value from a physical layer; and generating a PHR control unit to transmit on the PUSCH based on the PH value, and restarting a timer.
By using the reporting method of the power headroom and the terminal equipment, the terminal equipment determines that the time unit meets the condition of sending the PHR; the terminal equipment sends N PHR MAC CEs through N reported PUSCHs in the time unit, wherein any 2 of the N reported PUSCHs are different carrier waves positioned in the time unit and/or different time positions positioned in a first time unit; and the terminal equipment restarts the timer when the time unit is finished.
The technical solutions provided by the embodiments of the present application are 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 is used for a terminal device and comprises the following steps 10-30.
Step 10, triggering power headroom reporting;
for example, the conditions for triggering the reporting of the power headroom include: the timer times out.
For example, the terminal device satisfies the condition of PHR trigger in the first time unit. The network device configures a timer and a power change threshold parameter for the terminal device. For example, the network device configures parameters prohibitPHR-Timer, periodicPHR-Timer, and phr-Tx-powerfactory change for the terminal device.
For example, if the following conditions are met, the terminal device triggers PHR to report: (1) the prohibitPHR-Timer times out, and the change value of the path loss exceeds phr-Tx-PowerFactorChange dB; (2) the periodicPHR-Timer times out. The value units of the prohibitPHR-Timer and the periodicPHR-Timer are subframes, and as a time unit, for example, sf500 indicates 500 subframes. Referring to chapter 7 of 3GPP TS 38.213 Vf30 and 3GPP TS 38.101-2 Vf30, the terminal device has other conditions for triggering PHR reporting.
Step 20, the terminal equipment reports N PUSCHs to send PHR in a time unit;
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.
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 of the same carrier, or the N reported PUSCHs are located at different carriers and different time positions.
For example, when there is uplink resource carrying MAC CE in the first time unit, the terminal device determines that the first time unit satisfies the condition for transmitting PHR.
Under the condition that the terminal equipment is configured with carrier aggregation, the terminal equipment transmits PHR MAC CE in each of N reported PUSCHs in a first time unit. Any two of the N reported PUSCHs may be located on different carriers, or located at different time positions of the same carrier.
For example, if carrier X comprises PUSCH-a, carrier Y comprises PUSCH-B, PUSCH-C, and carrier Z comprises PUSCH-D, PUSCH-E, then reporting PUSCH may include:
TABLE 1 PH values carried when PUSCHs-A-E are used for reporting PUSCHs
Figure BDA0001943248240000061
Figure BDA0001943248240000071
For the carrier wave where the reported PUSCH is located, calculating the power margin value of the carrier wave by using the transmission power of the real PUSCH; for the carriers other than the reported PUSCH, the power headroom value of the carrier is calculated by using the real PUSCH power or by using the assumed power value (further, how to determine whether to calculate the power headroom value by using the transmission power of the real PUSCH or calculate the power headroom value by using the assumed value, see the embodiment shown in fig. 2).
Preferably, in the method of the present application, the number of carriers calculated by the power headroom values in the N reported PUSCHs using the real power value is greater than the number of carriers calculated by the power headroom values in any 1 reported PUSCH using the real PUSCH power value.
And step 30, the terminal equipment releases the triggering power headroom reporting condition.
Further preferably, the terminal device restarts the timer at the end of the time unit.
It should be noted that, according to the prior art, after triggering the PHR report and satisfying the PHR report condition, the terminal device reports the PHR only once, that is, restarts the periodicPHR-Timer and the prohibitpyr-Timer. And thus does not support the terminal device to transmit MAC CEs of multiple PHR within 1 subframe.
According to the scheme of the step 30 of the invention, the terminal equipment restarts the periodicPHR-Timer and the prohibitPHR-Timer at the end time of the first time unit for transmitting the PHR. In the first time unit, the terminal device keeps meeting the reporting condition of the PHR.
Fig. 2 is a schematic diagram of reporting PUSCH and target PUSCH.
According to the method of any embodiment of the present application, a power headroom value of a first carrier is calculated by using the true power value of the reported PUSCH; the first carrier is the carrier where the reported PUSCH is located.
For example, the ith bit in the N reported PUSCHs is located in a first carrier, and the power headroom value of the first carrier in the ith reported PUSCH is calculated by using the real power value of the ith reported PUSCH; and calculating the power margin value of the K carrier wave in the ith reported PUSCH by using a target PUSCH, wherein the target PUSCH is positioned in the K carrier wave, and calculating the power margin value (K is less than or equal to M) of the K carrier wave in the ith reported PUSCH by using the real power value or the assumed power value of the target PUSCH.
And the target PUSCH is the PUSCH in the first time slot which is overlapped with the time slot of the reported PUSCH in the Kth carrier wave.
And defining the target PUSCH to be positioned in a target time slot of the Kth carrier wave.
For example, the subcarrier interval of the kth carrier is not greater than the subcarrier interval of the first carrier, and the target timeslot overlaps with the timeslot of the ith reported PUSCH in the first carrier; for another example, the subcarrier spacing of the kth carrier is greater than the subcarrier spacing of the first carrier, and the target timeslot is a first timeslot of a plurality of timeslots overlapping with a timeslot of the ith reported PUSCH on the first carrier.
It should be noted that, in the R15 system, the duration of one symbol is different for different subcarrier intervals. The larger the carrier spacing, the smaller the duration of a single symbol. However, regardless of the subcarrier spacing, one slot is formed of 14 symbols, and the slot lengths of carriers in different subcarrier spacings are different.
It should be noted that various parameter sets (numerology) are supported in the NR system. Each set of parameters 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. The time length of a slot is different for different sets of parameters. Accordingly, one subframe includes different numbers of slots for different parameter sets. Each slot comprises 14 symbols, but the symbol lengths corresponding to different parameter sets are different. If the parameter sets of the plurality of cells aggregated by the carrier waves are different, the length of the time slot in which the PUSCH reported by the PHR is positioned is different from the length of the time slot in which the target PUSCH positioned in other carrier waves is positioned.
As shown in fig. 2, carrier X corresponds to parameter set configuration X; the carrier wave Y corresponds to the parameter set configuration Y; the carrier Z corresponds to the parameter set configuration Z. One slot length of the parameter set configuration X is 1ms, one slot length of the parameter set configuration Y is 0.5ms, and one slot length of the parameter set configuration Z is 0.25 ms.
On the basis of the above method, preferably, the power headroom value of the kth carrier is calculated with the real power value of the target PUSCH or calculated with the assumed power value.
For example, if the terminal device includes L PUSCHs in the target timeslot of the kth carrier, where L is greater than or equal to 1, P known PUSCHs exist in the L real PUSCHs, and P is less than or equal to L, where the known PUSCHs are uplink scheduling indication receiving times corresponding to the known PUSCHs are not later than uplink scheduling indication receiving times corresponding to the ith reported PUSCH; if P is equal to 0, calculating by using the assumed power value; if P is greater than 0, the target PUSCH is a known PUSCH and is calculated by using the real power value of the target PUSCH.
For example, taking fig. 2 as an example, when the carrier X is the first carrier and the carrier Y is the target carrier, the slot # i is the target slot, the number L of PUSCHs in the target slot is 1, and the number P of PUSCHs is known to be 0.
For another example, taking fig. 2 as an example, when the carrier Y is the first carrier and the carrier X is the target carrier, the slot # j is the target slot, the number L of PUSCHs in the target slot is 1, and the number P of PUSCHs is known to be 1.
Note that the target slot may include 1 or more PUSCHs. When a plurality of known PUSCHs are contained in a target time slot, the target PUSCH is the PUSCH with the earliest starting time or the earliest ending time in the target time slot. Or, the target PUSCH is a first PUSCH in the target slot.
For another example, if the terminal device does not transmit PUSCH in the target slot of the kth carrier, the calculation is performed using an assumed power value.
The assumed power value may also be considered as a power value of a target PUSCH "assumed" in a target slot. The "assumed" target PUSCH may be defined according to a preset rule, and is not specifically limited herein. As an example, the hypothetical MPR of 0dB, a-MPR of 0dB, P-MPR of 0dB, and TC of 0dB may be calculated as described in chapter 7 of 3GPP TS 38.213 Vf30
Figure BDA0001943248240000091
By using
Figure BDA0001943248240000092
And calculating a power margin value.
Assuming that the terminal device sends PHR on PUSCH-a of carrier X, according to the prior art, there are the following constraints on the respective corresponding PHs of each carrier:
if there are multiple slots where other carriers overlap with the slot where the PUSCH for reporting PHR is located (for example, slot # j of carrier X overlaps with slots # i, # i +1 of carrier Y, and overlaps with slots # k, # k +1, # k +2, # k +3 of carrier Z), the PH values of other carriers only consider the first slot (the PH value of carrier Y is calculated as the PUSCH real power value or the assumed power value of slot # i, and the PH value of carrier Z is calculated as the PUSCH real power value or the assumed power value of slot # k). Although the above diagram shows that the slots # k +1 and # k +2 of the carrier Z have PUSCH-D and PUSCH-E transmissions, respectively, the PH of the carrier Z can only be calculated with the assumed power value of the slot # k.
And if the uplink scheduling indication corresponding to the PUSCH on the other carrier wave is later in time than the uplink scheduling indication corresponding to the PUSCH reporting the PHR, the PUSCHs on the other carrier wave are not considered in PH calculation. Scheduling time T1 (located at Slot # i-n1) corresponding to PUSCH-B in Slot # i of carrier Y in FIG. 2 is after scheduling time T0 (located at Slot # j-n0) corresponding to PUSCH-A. When the terminal equipment receives the scheduling indication information for scheduling the PUSCH-A, the scheduling indication information of the PUSCH-B is not received, so that when a data packet of the PUSCH-A is formed, the PH value corresponding to the carrier Y cannot be calculated by using the power value (real power value) of the PUSCH-B, and the PH value corresponding to the carrier Y can only be calculated by using the assumed power value.
And if the uplink scheduling indication corresponding to the PUSCH on the other carrier wave is earlier in time than the uplink scheduling indication corresponding to the PUSCH reporting the PHR, whether the PUSCH on the other carrier wave is in the target time slot is also checked. Scheduling time T2 (located at Slot # k-n2) corresponding to PUSCH-D in Slot # k of carrier Z as in fig. 2 precedes scheduling time T0 (located at Slot # j-n0) corresponding to PUSCH-a. When receiving scheduling indication information for scheduling PUSCH-A, the terminal equipment already receives the scheduling indication information of PUSCH-D, but because the time slot of the PUSCH-D is slot # k +1 instead of the target time slot # k, the terminal equipment cannot calculate the PH value corresponding to the carrier Z by using the power value of the PUSCH-D; since there is no known PUSCH in the target slot # k, only the PH value corresponding to the carrier Z can be calculated by using the assumed power value.
In the PHR that may be carried on the PUSCH, the case of calculating the PH value for each carrier is as follows:
TABLE 2 PH value calculation for Carrier X/Y/Z
Figure BDA0001943248240000101
Figure BDA0001943248240000111
If the terminal device transmits PHR only on PUSCH-a of carrier X, the PH of carrier Z and carrier 3 can only be calculated at the assumed power value. When receiving the scheduling indication information of the PUSCH-A, the terminal equipment does not know that the PUSCH-B and the PUSCH-C need to be transmitted subsequently. It is not determined that the sending of the PHR on the PUSCH-C can carry the PHs calculated by all carriers based on the real power values. When the PUSCH-A is used as a reported PUSCH, correspondingly, the carrier wave X is the first carrier wave. At this time, the target slot on carrier Y is slot # i, and the target slot on carrier Z is slot # k.
According to the scheme of the invention, besides the PUSCH-A of the carrier X, the terminal equipment can also send PHR at the PUSCH-C of the carrier Y, and the PH value of the carrier Y in the PHR can be calculated based on the real power value (PUSCH-C). And when the PUSCH-B or the PUSCH-C is used as the reported PUSCH, correspondingly, the carrier wave Y is the first carrier wave. For example, when PUSCH-B is used to report PUSCH, the target slot on carrier X is slot # j, and the target slot on carrier Z is slot # k.
The PH value for carrier Z may also be calculated based on the true power value (PUSCH-E). This is because PUSCH-E is the PUSCH in the first slot # k +2 of slots # k +2, # k +3 on carrier Z that overlaps with slot # i +1 in which PUSCH-C is located. And when the PUSCH-D or the PUSCH-E is used as the reported PUSCH, correspondingly, the carrier wave Z is the first carrier wave. For example, when PUSCH-E is used to report PUSCH, the target slot on carrier X is slot # j, and the target slot on carrier Y is slot # i + 1.
In this way, the network device may obtain, for example, the true power value-based calculated PH values of carrier Y and carrier Z through the PHR in the PUSCH-C of carrier Y.
Preferably, in the method of the present application, the number of carriers with actual power values for the power headroom values in the N reported PUSCHs is greater than the number of carriers with actual power values for the power headroom values in any 1 PUSCH.
For example, 2 reported PUSCHs are used, namely PUSCH-B and PUSCH-D. And when the PUSCH-B is used for reporting the PUSCH, calculating the power margins of the carrier X and the carrier Y by respectively using the real power value of the PUSCH-A and the real power value of the PUSCH-B, wherein the number of the carriers using the real power value is 2. And when the PUSCH-D is used for reporting the PUSCH, calculating the power margin of the carrier 3 by using the real power value of the PUSCH-D, wherein the number of the carriers using the real power value is 1. Thus, the number of the 2 carriers reporting the true power value for the PUSCH is 3, and is more than that of any carrier reporting the true power value for the power residual value in the PUSCH.
The terminal device can determine the value of N according to the time relationship between scheduled PUSCHs on each carrier in the first time unit and the time sequence relationship of scheduling indication information corresponding to the scheduled PUSCHs, and determine which N PUSCHs to send the PHR MAC CE, so that the network device is ensured to obtain as many PH values calculated based on the real power value as possible, and the requirement of the network device for effectively scheduling the uplink transmission of the terminal device is met. For a parameter set with a larger carrier spacing, the time of 1 time slot is shorter, and a plurality of time slots are included in 1 time unit. The terminal device sends PHRs on PUSCHs at multiple time positions in the first time unit, and the network device can also be guaranteed to acquire the PH values calculated based on the real power values as much as possible.
The application also provides a terminal device for the method in any one of the embodiments of the application. The terminal equipment is used for triggering the reporting of the power headroom; the terminal device is configured to send a power headroom report in N reported PUSCHs in the time unit; the power headroom report includes power headroom values of M carriers.
Preferably, the terminal device further includes a timer.
For example, the timer includes a first timer and/or a second timer, and the condition for triggering the reporting of the power headroom includes any one or more of the following:
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.
For example, the Timer includes a first Timer periodicPHR-Timer and/or a second Timer prohibitpyr-Timer, and is used for triggering 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 "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present 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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