CN112867123B

CN112867123B - Communication method and device

Info

Publication number: CN112867123B
Application number: CN201911090549.3A
Authority: CN
Inventors: 陈岩; 彭炳光; 张茜
Original assignee: Honor Device Co Ltd
Current assignee: Honor Device Co Ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2023-11-17
Anticipated expiration: 2039-11-08
Also published as: CN112867123A

Abstract

The embodiment of the application provides a communication method and a device, relates to the field of communication, and can solve the problems of wireless link failure or connection release and the like caused by overlarge P-MPR. The method comprises the following steps: the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal equipment in N time units to the sum of maximum transmitting power of the terminal equipment in N time units; the terminal device determines a power back-off value of the terminal device according to the first information, the power back-off value being related to the SAR/MPE, e.g. the power back-off value may be a P-MPR. The embodiment of the application is applied to a 5G communication system.

Description

Communication method and device

Technical Field

The present application relates to the field of communications, and in particular, to a communication method and apparatus.

Background

When the terminal equipment receives and transmits data in a wireless mode, ionizing radiation can be generated on a human body under the action of an electromagnetic field. Various national authorities, such as the federal communications commission and the international non-ionizing radiation protection commission, etc., impose restrictions on Radio Frequency (RF) radiation from terminal devices, avoiding harm to the human body caused by ionizing radiation generated by the terminal devices. In general, a terminal device having an operating frequency below 6GHz can evaluate the influence of ionizing radiation on the human body using an electromagnetic wave absorption ratio/radiation absorption rate (specific absorption rate, SAR); terminal equipment above 6GHz, due to the higher frequency of electromagnetic waves, has a relatively poor penetration of electromagnetic waves, and the effect of ionizing radiation on the human body is generally evaluated with maximum permissible exposure (maximum permissible exposure, MPE).

In a wireless communication system standard, for example, a 5th generation mobile communication (The 5th generation,5G) communication system formulated by a third generation partnership project (The 3rd Generation Partnership Project,3GPP), in order to avoid that ionizing radiation generated by a terminal device is too large to exceed regulatory requirements of various countries, a maximum output power back-off (max output power reduction, MPR), i.e., a parameter P-MPR, is used, and The maximum transmission power of The terminal device is limited by The P-MPR, so as to reduce SAR or MPE of The terminal device, thereby achieving The purpose of meeting regulatory requirements. Since the P-MPR is autonomously controlled and set by the terminal device, if the terminal device sets a larger P-MPR, the terminal device may cause problems such as radio link failure or connection release.

Disclosure of Invention

The embodiment of the application provides a communication method and a communication device, which can solve the problems of wireless link failure or connection release and the like caused by overlarge P-MPR.

In a first aspect, an embodiment of the present application provides a communication method, including: the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal equipment in N time units to the sum of maximum transmitting power of the terminal equipment in N time units; and the terminal equipment determines a power back-off value of the terminal equipment according to the first information, wherein the power back-off value is related to SAR.

Based on the method provided by the embodiment of the application, the terminal equipment can receive the first information from the network equipment, wherein the first information is used for indicating the ratio of the uplink channel power to the maximum transmitting power of the terminal equipment in the first time interval; the terminal device determines a power back-off value of the terminal device according to the first information, where the power back-off value is related to SAR, for example, the power back-off value may be P-MPR. In this way, the terminal device can adjust the P-MPR according to the first information indicated by the network device, and the problems of wireless link failure or connection release and the like caused by the fact that the terminal device autonomously sets the larger P-MPR can be avoided.

In one possible design, the first information is carried in at least one of first downlink control information (downlink control information, DCI) or first radio resource control (radio resource control, RRC) signaling, the first DCI or the first RRC signaling being derived based on time division duplex (time division duplexing, TDD) uplink and downlink subframe proportioning.

In one possible design, the first information is carried in at least one of a second DCI or a second RRC signaling or a control element of media access control (media access control control element, MAC CE), which is preconfigured.

Alternatively, the first information may be carried in a bandwidth part (BWP) handover message.

In one possible design, the determining, by the terminal device, a power backoff value of the terminal device based on the first information includes: after the terminal equipment determines the power back-off value according to a preset condition, updating the power back-off value according to the first information; or after the terminal equipment determines the power back-off value according to the actual uplink duty ratio and the uplink transmitting power, updating the power back-off value according to the first information. In this way, the terminal device can adjust the P-MPR according to the first information indicated by the network device, and the problems of wireless link failure or connection release and the like caused by the fact that the terminal device autonomously sets the larger P-MPR can be avoided.

In one possible design, before the terminal device receives the first information from the network device, the method further includes: the terminal device sends first capability information to the network device, where the first capability information is used to instruct the terminal device whether to determine the power back-off value according to a preset condition, or the first capability information is used to instruct the terminal device whether to determine the power back-off value according to an actual uplink duty cycle and uplink transmission power. In this way, the network may determine, according to the first capability information, whether the terminal device determines the power back-off value according to the actual uplink duty cycle and the uplink transmit power, or whether the terminal device determines the power back-off value according to a preset condition, so as to respectively formulate corresponding power back-off value adjustment policies (the adjustment policies may be display indication or implicit indication) according to different situations, so as to avoid problems such as radio link failure or connection release caused by the terminal device autonomously setting a larger P-MPR.

In one possible design, the terminal device sending the first capability information to the network device includes: the terminal device sends a power headroom report, PHR, to the network device, the PHR including the first capability information. For example, the reserved bit in the PHR may be used to indicate the first capability information, or the new bit in the PHR may be used to indicate the first capability information, which is not limited by the present application.

In one possible design, if the PHR is a single entity PHR MAC CE (Single Entry PHR MAC CE), the single entity PHR MAC CE includes a first bit for indicating a reason why the maximum transmit power of the terminal device is lower than a predetermined transmit power. Therefore, the network device can determine the reason that the maximum transmitting power of the terminal device is lower than the preset transmitting power according to the first bit, and then the transmitting power of the terminal device can be improved by reducing uplink scheduling, changing the adjusting mode, waveform characteristics and other methods of uplink transmission, so that the aim of overall better network performance is fulfilled.

In one possible design, the method further comprises: the terminal device sends second capability information to the network device, where the second capability information is used to indicate a maximum uplink symbol percentage that the terminal device meets a target rule under a condition that an uplink reaches a maximum transmission power. Thus, if the uplink of the terminal device reaches the maximum transmission power, the network device may schedule the terminal device according to the symbol duty cycle of the second capability information; if the terminal device does not reach the maximum uplink transmission power, the network device can increase the scheduled symbol duty ratio proportionally, so that the goal of conforming to the regulations and not affecting the maximum uplink rate can be achieved.

In a second aspect, an embodiment of the present application provides a communication method, including: the network device sends first information to the terminal device, where the first information is used to indicate a ratio of a sum of uplink channel powers of the terminal device in the N time units to a sum of maximum transmission powers of the terminal device in the N time units.

In one possible design, the first information is carried in at least one of first downlink control information DCI or first radio resource control RRC signaling, where the first DCI or the first RRC signaling is obtained based on TDD uplink and downlink subframe proportioning.

In one possible design, the first information is carried in at least one of a second DCI or a second RRC signaling or a control element MAC CE of the medium access control, the second DCI or the second RRC signaling or the MAC CE being preconfigured.

In one possible design, the method further comprises: the network device receives first capability information from the terminal device, wherein the first capability information is used for indicating whether the terminal device determines a power back-off value according to a preset condition or whether the terminal device determines the power back-off value according to an actual uplink duty cycle and uplink transmission power.

In one possible design, the first capability information is carried in a power headroom report PHR.

In one possible design, if the PHR is a single entity PHR MAC CE, the single entity PHR MAC CE includes a first bit for indicating a reason why the maximum transmission power of the terminal device is lower than a preset transmission power.

In one possible design, the method further comprises: the network device receives second capability information from the terminal device, where the second capability information is used to indicate a maximum uplink symbol percentage of the terminal device that meets a target rule under a condition that the uplink reaches a maximum transmission power.

The technical effects of the second aspect and its various possible implementations may be referred to the technical effects of the first aspect and its various possible implementations, and are not described herein.

In a third aspect, an embodiment of the present application provides a communication apparatus, which may be a terminal device, including: a receiving unit, configured to receive first information from a network device, where the first information is used to indicate a ratio of a sum of uplink channel powers of the terminal device in N time units to a sum of maximum transmission powers of the terminal device in N time units; and the determining unit is used for determining a power back-off value of the terminal equipment according to the first information, wherein the power back-off value is related to the radiation absorption rate SAR.

In one possible design, the determining unit is configured to update the power back-off value according to the first information after determining the power back-off value according to a preset condition; or after determining the power back-off value according to the actual uplink duty cycle and the uplink transmission power, updating the power back-off value according to the first information.

In one possible design, the device further includes a sending unit, configured to send first capability information to the network device, where the first capability information is used to instruct the terminal device whether to determine the power back-off value according to a preset condition, or the first capability information is used to instruct the terminal device whether to determine the power back-off value according to an actual uplink duty cycle and an uplink transmission power.

In one possible design, the transmitting unit is configured to transmit a power headroom report, PHR, to the network device, the PHR comprising the first capability information.

In one possible design, the sending unit is further configured to send second capability information to the network device, where the second capability information is configured to indicate a maximum uplink symbol percentage of the terminal device that meets the target rule under a condition that the uplink reaches the maximum transmission power.

In a fourth aspect, an embodiment of the present application provides a communication apparatus, which may be a network device, including: and the sending unit is used for sending first information to the terminal equipment, wherein the first information is used for indicating the ratio of the sum of the uplink channel power of the terminal equipment in N time units to the sum of the maximum transmission power of the terminal equipment in N time units.

In one possible design, the first information is carried in at least one of first downlink control information DCI or first radio resource control RRC signaling, where the first DCI or the first RRC signaling is obtained based on time division duplex TDD uplink and downlink subframe proportioning.

In one possible design, the device further includes a receiving unit, configured to receive first capability information from the terminal device, where the first capability information is used to instruct the terminal device whether to determine the power back-off value according to a preset condition, or the first capability information is used to instruct the terminal device whether to determine the power back-off value according to an actual uplink duty cycle and an uplink transmission power.

In one possible design, the receiving unit is further configured to receive second capability information from the terminal device, where the second capability information is configured to indicate a maximum uplink symbol percentage of the terminal device that meets the target rule under a condition that the uplink reaches the maximum transmission power.

In a fifth aspect, embodiments of the present application provide a computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform any of the methods provided in any of the above aspects.

In a sixth aspect, embodiments of the present application provide a computer program product comprising instructions which, when run on a computer, cause the computer to perform any of the methods provided in any of the above aspects.

In a seventh aspect, an embodiment of the present application provides a chip system, where the chip system includes a processor and may further include a memory, where the processor is configured to implement any one of the methods provided in any one of the foregoing aspects. The chip system may be formed of a chip or may include a chip and other discrete devices.

In an eighth aspect, an embodiment of the present application further provides an apparatus, where the apparatus may be a terminal device or a chip. The apparatus comprises a processor configured to implement any one of the methods provided in the first aspect. The apparatus may also include a memory for storing program instructions and data, which may be a memory integrated within the apparatus or an off-chip memory disposed external to the apparatus. The memory is coupled to the processor, which may call and execute program instructions stored in the memory for implementing any one of the methods provided in any one of the above aspects. The apparatus may also include a communication interface for the apparatus to communicate with other devices.

In a ninth aspect, an embodiment of the present application provides a communication system, including the terminal device in the third aspect, and the network device in the fourth aspect.

Drawings

FIG. 1 is a schematic diagram of PHR format provided in an embodiment of the present application;

FIG. 2 is a schematic diagram of another PHR format according to an embodiment of the present application;

fig. 3 is a schematic diagram of a hierarchical structure of a subframe ratio of TDD according to an embodiment of the present application;

fig. 4 is a schematic diagram of a DL/UL configuration according to an embodiment of the present application;

fig. 5 is a schematic diagram of yet another DL/UL configuration provided in an embodiment of the present application;

fig. 6 is a schematic diagram of a communication system suitable for a communication method according to an embodiment of the present application;

fig. 7 is a schematic signal interaction diagram of a communication method according to an embodiment of the present application;

fig. 8 is a schematic structural diagram of a Single Entry PHR MAC CE according to an embodiment of the present application;

fig. 9 is a schematic structural diagram of a Multiple Entry PHR MAC CE according to an embodiment of the present application;

FIG. 10 is a schematic diagram of signal interaction of a capability query according to an embodiment of the present application;

fig. 11 is a schematic structural diagram of yet another Single Entry PHR MAC CE provided by an embodiment of the present application;

Fig. 12 is a schematic structural diagram of yet another Multiple Entry PHR MAC CE provided by an embodiment of the present application;

fig. 13 is a schematic structural diagram of an MCE CE according to an embodiment of the present application;

fig. 14 is a schematic signal interaction diagram of an RRC configuration according to an embodiment of the present application;

fig. 15 is a schematic diagram of signal interaction indicating an equivalent uplink duty cycle according to an embodiment of the present application;

fig. 16 is a schematic diagram of signal interaction indicating an equivalent uplink duty cycle according to another embodiment of the present application;

fig. 17 is a schematic structural diagram of a terminal device according to an embodiment of the present application;

fig. 18 is a schematic structural diagram of still another terminal device according to an embodiment of the present application;

fig. 19 is a schematic structural diagram of a network device according to an embodiment of the present application;

fig. 20 is a schematic structural diagram of still another network device according to an embodiment of the present application.

Detailed Description

For clarity and conciseness in the description of the embodiments below, a brief introduction to related concepts or technologies is first given:

power headroom report (power headroom report, PHR)/Power Headroom (PH): beginning with the fourth generation (4th generation,4G) mobile communication system, i.e., long term evolution (long term evolution, LTE), PHR is an important component of the uplink power control related protocol. The 5G mobile communication system basically uses the related protocol of PHR in LTE. Wherein the PHR is mainly used for periodically reporting the difference between the uplink channel estimation power and the maximum transmission power of a terminal device (e.g., user Equipment (UE)) to a network device (e.g., a base station), so that the base station provides more suitable scheduling for the UE. The PHR-related protocol is a protocol belonging to a medium access control (media access control, MAC) layer, and the UE may report PHR through a MAC CE. As shown in fig. 1, a schematic structure of a PHR MAC CE in an early LTE release (e.g., a release before LTE R10) includes 8 bits (bits), where the first two bits are reserved bits (R bits), and the last 6 bits represent PH. The PHR MAC CE may be spaced 2dB apart and coverage may range from-32 dB to +38dB.

The PH may include various kinds, taking type1 (type 1) PH of NR as an example, the calculation formula of which is shown in formula (1):

wherein, pcmax is the maximum transmitting power of the UE, and the meaning of the expression in brackets is the transmitting power of the physical uplink shared channel (physical uplink shared channel, PUSCH) calculated by the UE, and the difference between the transmitting powers of the Pcmax and PUSCH is PH.

The definitions of the Pcmax slightly differ in different scenes of 4G and 5G, taking a frequency range1 (frequency range1, FR 1) of 5G as an example, and the formula expression is shown as formula (2) -formula (4):

P _{CMAX_L,f,c} ≤P _CMAX,f,c ≤P _{CMAX_H,f,c} with (2)

P _{CMAX_L,f,c} ＝MIN{P _EMAX,c –ΔT _C,c ,(P _PowerClass –ΔP _PowerClass )–MAX(MAX(MPR _c ,A-MPR _c )+ΔT _IB,c +ΔT _C,c +ΔT _RxSRS ,P-MPR _c )} (3)

P _{CMAX_H,f,c} ＝MIN{P _EMAX,c ,P _PowerClass –ΔP _PowerClass } (4)

wherein the value of Pcmax is between P _{CMAX_L,f,c} And P _{CMAX_H,f,c} Between, P _{CMAX_H,f,c} Is an upper limit value, and Pcmax is mainly defined by P _{CMAX_L,f,c} And calculating a corresponding formula. Delta T _C,c Is a fixed value related to whether the frequency point is at the Band edge; A-MPR _c Is the value that the network configures to the UE in radio resource control (radio resource control, RRC) signaling; delta T _IB,c Is supporting carrier aggregation (carrier aggregation, CA) or dual connecticity, DC) is additionally allowed to relax; Δtrxsrs is a power offset related to a sounding reference signal (sounding reference signal, SRS) channel, maximum output power back-off (max output power reduction, MPR) is a power back-off related to a modulation scheme, and P-MPR is a power back-off related to a radiation absorption ratio (specific absorption rate, SAR).

For ease of understanding, the (MAX (MPR) _c ,A-MPR _c )+ΔT _IB,c +ΔT _C,c +ΔT _RxSRS ) The expression is denoted as xMPR, and the fixed value is eliminated, and the expressions (2) to (4) can be simplified as expression (5):

P _CMAX ＝P _PowerClass –MAX(xMPR,P-MPR) (5)

wherein P is _PowerClass The maximum transmit power of the terminal device formulated for the protocol corresponds to, for example, 26 decibel milliwatts (dBm) for power class 2 (power class 2, pc 2) and 23dBm for power class 3 (power class 3, pc 3). xMPR is a modulation-dependent power backoff, and P-MPR is a SAR-dependent power backoff.

It should be noted that, the terminal device only reports PH, and the network cannot determine the actual transmit power of the UE. In order to solve the problem that the network equipment cannot determine the real transmitting power of the terminal equipment in PHR reporting, the R10 version of LTE introduces extended Extended PHR MAC CE reporting on the basis of the original reporting structure. In the new reporting structure, the protocol introduces reporting of the Pcmax. As shown in fig. 2, a schematic structural diagram of Extended PHR MAC CE in R10 is shown. Extended PHR MACCE Presence indication C comprising a plurality of PHRs _i ，C _i =1 indicates that the serving cell with ServCellIndex i has PHR report; the method also comprises Vbit, which is used for indicating whether the calculation mode of PH is according to the transmission of the real PUSCH; and 8 bits for reporting the Pcmax (such as the Pcmax, c1, the Pcmax, cm and the like) of the UE, wherein the first 2 bits in the 8 bits are reserved bits (R bits), and the last 6 bits are used for indicating the Pcmax. Pcmax ranges from-29 to 33dBm at 1dBm intervals. The value range of the Pcmax can refer to 38.133 protocol, and will not be described herein.

After the terminal equipment reports the Pcmax, the network equipment can determine the power margin PH and can also obtain the actual transmitting power of the terminal equipment. For example, suppose that v=0 in PHR reported by a certain secondary terminal device in the FR1 scenario; ph=0db, pcmax=20dbm, then the network device may back-extrapolate:

1, v=0, where the report is PHR reported according to the transmission power calculated by the actual PUSCH;

2, ph=0, where the power headroom of the UE reported this time is 0;

3, ph=0, and pcmax=20 together represent that the calculated power of the PUSCH reported this time is 20dBm; the true transmit power is also 20dBm;

4, pcmax=20 indicates that uplink power transmission of the current UE has a limit, and the limit has a value of 3dB.

In the 5G protocol (for example, protocol 38.101-1/2/3/4), there is a significant difference in definition of Pcmax in FR1 and FR 2.

The definition of FR1 Pcmax, referring to the relevant description above, can be represented by (2) -formula (4) or simplified formula (5). The PowerClass in the formula for FR1 Pcmax is of a definite value, with power class 2/3 being 26/23dBm, respectively.

The Pcmax of FR2 theoretically refers to the power of the antenna port, but this power value cannot be measured due to the characteristics of FR 2. From the FR2 protocol, if the formula is re-ordered, as shown in equation (6):

Pcmax＝(P _PowerClass –MAX{T(MAX(MPRf,c,A-MPRf,c,)),T(P-MPRf,c)})–MAX(MAX(MPRf,c,A-MPRf,c,)+ΔMBP,n,P-MPRf,c) (6)

For ease of understanding, the (MAX (MPR) _c ,A-MPR _c )+ΔT _IB,c +ΔT _C,c +ΔT _RxSRS ) Denoted as xMPR, so that Pcmax for FR2 can be as follows:

Pcmax＝(P _PowerClass -MAX { T (MAX (MPRf, c, A-MPRf, c) }) -MAX (xMPR, P-MPRf, c) formula (6)

Equation (6) for FR2 is similar to equation (5) for FR1, but due to (P _PowerClass The value of MAX { T (MAX (MPRf, c, A-MPRf, c) }, T (P-MPRf, c) } is a range, so that xMPR and P-MPR cannot be reversely deduced from PHR report like FR1Magnitude relation. However, after minor protocol modification, the magnitude relation between xMPR and P-MPR can be reversely deduced from PHR report under FR 2.

SAR: refers to the electromagnetic wave energy absorption ratio of a human body to a mobile phone or a wireless product. Under the action of external electromagnetic field, an induced electromagnetic field is generated in human body, and the differential value of the energy infinitesimal (dW) absorbed (dissipated) by the mass infinitesimal (dm) in the volume infinitesimal (dV) with given density (p) is SAR, and the unit is W/kg.

The physical definition of SAR is shown in formula (7):

e is the intensity value of an electric field in a tissue, and the unit is V/m; ρ is the density of the substance corresponding to the different parts of the human body; σ is the conductivity.

The SAR measurement device can detect the magnitude and distribution of the electric field intensity E and then convert it into a value of SAR by calculation. Major certification authorities for SAR are the Federal Communications Commission (FCC) and CE in the united states. Generally, wireless products with operating frequencies below 6GHz use SAR to evaluate radiation effects; products above 6GHz, due to the high frequency of electromagnetic waves, have poor penetration of electromagnetic waves, and MPE or EMF is typically used to evaluate the radiation effects on the human body. The 5G protocol employs both frequencies below 6GHz (FR 1 or Sub 6G) and frequencies above 6GHz (FR 2), FR2 also known as millimeter wave (mmW) systems.

The federal communications commission (federal communications commission, FCC) and the international non-ionizing radiation protection committee (ICNIRP) impose exposure limits on radio frequency radiation from wireless devices. These limits are specified as SAR (power per unit volume) for the frequency band below 6GHz, and maximum allowable exposure (MPE) (power per unit area) for the frequency band above 6 GHz. The protocol considers the rule requirement of SAR/MPE, introduces the P-MPR, and limits the maximum transmitting power of UE through the P-MPR to achieve the purpose of meeting the rule requirement.

Duty cycle ": in TDD mode in 4G/5G, both uplink and downlink transmissions are on the same frequency point, and uplink and downlink data are transmitted in different time slots, so there is a concept of a subframe ratio, and a typical subframe ratio may be, for example, 8:2 (80% downlink subframe: 20% uplink subframe), which corresponds to 20% uplink "duty ratio". For a UE or mmW base station, adjustment of the transmit power according to the "duty cycle" may be allowed. It should be appreciated that the uplink duty cycle may be doubled for each 3dB drop in transmit power. For example, if in a certain scenario, the P-MPR corresponding to 100% of the upstream duty cycle is 10dB, the P-MPR corresponding to 50% of the upstream duty cycle in the scenario may be 7dB.

Sub-frame proportioning: as shown in fig. 3, a schematic diagram of a hierarchical structure of a subframe proportioning of TDD is shown. The level 1 is a Cell-level RRC configuration (Cell-specific RRC configuration), which is effective for all user equipments in the Cell. Wherein D represents a downlink slot (slot), i.e. a slot for downlink transmission, U represents an uplink slot, i.e. a slot for uplink transmission, and F represents a flexible slot, which may be configured as a downlink slot or as an uplink slot. The level 2 is the RRC configuration of the user level, and for the flexible slot in the level 1 configuration, it may be further specified whether it is a downlink slot or an uplink slot. Level 3 is a group (group) slot format index (slot format index, SFI) configuration, further designating a flexible slot (or symbol) that is also present in the previous order as either a downlink slot (or symbol) or an uplink slot (or symbol). Level 4 is a DCI dynamic indication of whether a flexible slot (or symbol) in the upper level 3 configuration is a downlink slot (or symbol) or an uplink slot (or symbol). The 2/3/4 level configurations are all user level configurations, which may not be considered in simulation modeling, since the user level configurations may cause interference problems, and the network side is expected to not use these configurations for a long time.

The level 1 configuration adopts an RRC configuration, and cells of the RRC configuration may be carried in a system information block (system information block, SIB) 1. For example, the cell of the RRC configuration may be: TDD-UL-DL-ConfigCommon and TDD-UL-DL-ConfigCommon2.

The two cells may support a dual cycle configuration, i.e., two UL/DL configuration cycles are combined together to form one larger UL/DL configuration cycle. The configuration type of the two cells may be the same, for example, TDD-UL-DL-ConfigCommon, and the definition of the configuration type is as follows:

wherein, the subcarrier spacing (subcarrier spacing, SCS) with reference to the reference subcarrier spacing, the slot length and symbol length of different SCSs can be different. It should be understood that UL/DL configuration is to configure time units (or durations), and one SCS needs to be specified to determine slot and symbol lengths.

TDD-UL-DL-ConfigCommon supports configuring 2 modes (patterns). Configuration cells in the TDD-UL-DL-Pattern are described as follows: dl-UL-transmissionpermeability: and a DL/UL configuration period, and the DL/UL configuration is repeated according to the period. For example, as shown in fig. 4, DL/UL configuration may be performed according to a DL/UL configuration period indicated by X. nrofDownlinkSlots: the number of complete slots for downlink transmission, x1 shown in fig. 4. nrofDownlinkSymbols: the number of symbols in the non-full slot for downlink transmission, x2 shown in fig. 4. nrofUplinkSlots: the number of complete slots for uplink transmission, i.e. y1 shown in fig. 4. nrofUplinkSymbols: the number of symbols in the non-full slot for uplink transmission, i.e. y2 shown in fig. 4. After determining the time units of D and U from the cells, the remaining time units are F, i.e. y3 shown in fig. 4.

When configuring a configurationCommon2 cell, as shown in fig. 5, DL/UL configuration may be performed according to a DL/UL configuration period indicated by Y. Wherein, the configuration cells in the TDD-UL-DL-Pattern in the configuration Common2 cell are described as follows: dl-UL-transmissionpermeability: for indicating a DL/UL configuration period, i.e., Y shown in fig. 5.

nrofDownlinkSlots: the number of complete slots for the downlink transmission, x3 shown in fig. 5. nrofDownlinkSymbols: the number of symbols in the non-full slot of the downlink transmission, x4 shown in fig. 3. nrofUplinkSlots: the number of complete slots for uplink transmission, i.e. y4 shown in fig. 3. nrofUplinkSymbols: the number of symbols in the non-full slot of the uplink transmission, i.e. y5 shown in fig. 5. The pattern configures a certain D-F-U uplink time domain manner, and after determining the time units of D and U according to the cells, the remaining time units are F, i.e., y6 shown in fig. 5.

It should be understood that when configuring a configuration cell, as shown in fig. 4, DL/UL configuration may be performed according to X (DL/UL configuration period); when both the configuration cell and the configuration command 2 cell are configured, as shown in fig. 5, the DL/UL configuration may be repeated according to the whole of X (one DL/UL configuration period) and Y (another DL/UL configuration period), the period length of the DL/UL configuration being the sum of the period lengths of X and Y.

The cell involved in the level 2 user level RRC configuration may be TDD-UL-DL-ConfigDedicated, and the configuration item of the corresponding configuration type of the cell is as follows:

the slot index corresponds to an index (index) of a slot to be rewritten, and the slot to be rewritten is a slot of F in the upper cell level RRC configuration. The symbols are used for configuring the slot specific DL and UL symbols which need to be rewritten: if the whole slot is rewritten to be the full downlink symbol (i.e. the symbols in the slot are all used for downlink transmission), selecting to use an allDownlink configuration item; if the whole slot is rewritten to be the full uplink symbol (i.e. the symbols in the slot are all used for uplink transmission), selecting an allUnlink configuration item for use; if part of symbol configures DL or UL, then nrofDown LinkSymbiols and nrofUpLinkSymbiols are used for configuration.

The third level is the configuration of the group SFI, the configuration mode is similar to the user level RRC configuration, the slot with F in the upper level RRC configuration can be rewritten, for example, DCI format2-0 scrambled by SFI-RNTI can be adopted to indicate the SFI.

The fourth level indicates DCI, and when performing uplink and downlink scheduling, the dynamically scheduled DCI may specify whether symbol in the F slot in the upper RRC configuration is used for downlink transmission or uplink transmission. The symbol level configuration dynamic configuration table under slot may refer to table11.1.1-1 in the protocol, which is not described herein.

The embodiment of the application provides a communication method which can be applied to various wireless communication systems such as an LTE system, a 5G NR system, a next generation wireless local area network system and the like.

As shown in fig. 6, a schematic diagram of a communication system suitable for a communication method according to an embodiment of the present application may include a network device 100 (e.g., a base station) and one or more terminal devices 200 (only 1 is shown in fig. 6) connected to the network device 100. The terminal equipment can receive first information from the network equipment, wherein the first information is used for indicating the ratio of uplink channel power to maximum transmitting power of the terminal equipment in a first time interval; the terminal device determines a power back-off value of the terminal device according to the first information, wherein the power back-off value is related to the radiation absorption rate SAR, and the power back-off value may be P-MPR, for example.

The technical solutions in the embodiments of the present application will be described below with reference to the accompanying drawings in the embodiments of the present application. Wherein, in the description of the application, unless otherwise indicated, "at least one" means one or more, and "a plurality" means two or more. In addition, in order to facilitate the clear description of the technical solution of the embodiments of the present application, in the embodiments of the present application, the words "first", "second", etc. are used to distinguish the same item or similar items having substantially the same function and effect. It will be appreciated by those of skill in the art that the words "first," "second," and the like do not limit the amount and order of execution, and that the words "first," "second," and the like do not necessarily differ.

For easy understanding, the communication method provided by the embodiment of the application is specifically described below with reference to the accompanying drawings.

As shown in fig. 7, an embodiment of the present application provides a communication method, including:

701. and reporting PHR by the terminal equipment.

Illustratively, the PHR may be a PHR of the NR protocol, which may include Single Entry PHR MAC CE and Multiple Entry PHR MAC CE.

Wherein Single Entry PHR MAC CE may comprise a first bit for indicating a reason why the maximum transmit power of the terminal device is lower than a preset transmit power. It should be noted that the first bit is an example, and in a specific implementation, the first bit may have other names or names, for example, may be referred to as P bit, which is not limited in particular by the embodiment of the present application.

As shown in fig. 8, an exemplary structure diagram of Single Entry PHR MAC CE is shown, where Single Entry PHR MAC CE may include P bits (first bits), R bits (reserved bits), pcmax and PH (e.g., the PH may be of type1, and the corresponding cell may be a PCell).

Wherein the P bit may indicate the cause (dominant factor) of the terminal device power backoff. The network device may determine the specific reason that the Pcmax is limited according to the P bit and then may process separately. For example, when p=1, the implicit indication is that P-MPR is larger, and the network device may determine that the power limitation is caused by SAR, that is, the power backoff of the terminal device is dominated by P-MPR, so that the network device may improve the transmit power of the UE by reducing uplink scheduling and other methods, so as to achieve the purpose of optimizing the overall network performance. When p=0, implicitly indicates that xMPR is large, the network device can determine that the reason for the Pcmax limitation is xMPR, i.e. the power backoff of the terminal device is dominated by xMPR. Because the xMPR is mainly caused by an adjustment mode, a waveform characteristic and the like of uplink transmission, the network equipment can correspondingly change the adjustment mode and the waveform characteristic of the uplink transmission so as to improve the transmitting power of the UE, thereby achieving the purpose of improving the overall performance.

Note that the first bit (for example, P bit) in Single Entry PHR MAC CE may include one bit or a plurality of bits (for example, 2 bits, 3 bits, or 4 bits), and the position of the first bit may be any one or more of reserved bits (R bits), for example, the P bit may be the first reserved bit of the 4 reserved bits. Thus, after receiving xPRR, the network device not only can learn the actual transmitting power of the UE, but also can determine that the specific reason for limiting the UE power is xMPR or P-MPR according to P bits so as to perform corresponding processing.

As also shown in FIG. 8, the Pcmax in Single Entry PHR MAC CE may include 6 bits, spaced 1dB apart, and may range from-29 to 33dBm. In addition, the value range of the Pcmax can refer to a 38.133 protocol, the definition of the Pcmax can refer to a 38.101-1/2/3/4 protocol and the like, and the application is not repeated.

It should be understood that, after the terminal device reports the Pcmax, the network device may not only learn the power margin, but also determine the actual transmit power of the UE.

Illustratively, as shown in fig. 9, a schematic diagram of Multiple Entry PHR MAC CE is shown, multiple Entry PHR MAC CE may include Ci, V bit, P bit, R bit, pcmax, PH, etc. Where Ci is an indication of the presence of multiple PHR, for example, ci=1 may indicate that a serving cell with ServCellIndex as i has PHR reporting. The V bit indicates whether the calculation manner of PH is based on the actual PUSCH transmission, and the P bit, the Pcmax and the PH may refer to the above related description, which is not described herein.

In some embodiments, when determining the P-MPR, the terminal device may use the following two methods, including a static method and a dynamic method:

1. static method: the terminal device may determine a power backoff value (i.e., P-MPR) according to a preset condition. For example, the preset condition may be that the UE tests a reduction (P-MPR) required by the rule under a certain rule (e.g., LTE or NR) with reference to a scene with a maximum uplink duty ratio supported by the rule (e.g., uplink subframe: downlink subframe: 9:1), where the reduction may ensure that the reduction of the scene with other duty ratios of the rule (e.g., uplink subframe: downlink subframe: 2:8 or 3:7, etc.) is not out of standard. For example, the UE may perform fixed tentering according to the worst scenario, or perform a series of fixed tentering according to different distances between a sensor (sensor) feedback antenna and a human body, or the UE may determine tentering (P-MPR) in combination with a subframe proportioning in a TDD scenario on the basis of the former two modes. The static method defaults to network devices having scheduling in schedulable subframes and UEs transmitting at full power (transmitting at maximum power) on scheduled subframes, in practice the UEs may not have so much scheduling.

For example, when the static method is adopted, the terminal device may transmit capability information (second capability information) to the network device, the second capability information indicating a maximum uplink symbol percentage at which the terminal device satisfies the target rule under the condition that the uplink reaches the maximum transmission power. For example, the terminal device may report, to the network device, the maximum percentage of symbols available for uplink transmission by the UE in a certain evaluation period (time period/time interval) through the capability item maxuplink uplink channel (second capability information), so as to ensure that the electromagnetic radiation requirement (target rule) of the regulatory agency is met. Specifically, the second capability information may be reported separately in two sub-capability items under FR1 and FR 2.

Wherein maxuplinkd utycycle may indicate a maximum symbol percentage that the UE may schedule for uplink transmissions within 1 second to ensure compliance with applicable electromagnetic power density exposure requirements provided by regulatory authorities. That is, the maxUplinkDuyCycle capability term itself is aimed at solving the problem of SAR/MPE compliance. However, defining maxUplinkDutycycle as the maximum symbol percentage of the uplink transmission schedule results in the problem that the UE has smaller transmit power, limited maximum duty cycle of uplink, and cannot reach maximum uplink rate in the scenario where the UE has better signals at near points (closer to the base station) and there is no risk of radiation overscaling.

In order to solve the above problem, in the present application, the definition of the maxuplink channel capability item may be extended to meet the maximum symbol percentage that can be supported by the relevant radiation regulations under the condition that the UE reaches the maximum transmission power in the uplink. The name of the expanded maxuplinkutycycle capability item may still be maxuplinkutycycle, or may be a new name, for example, maxuplinkeffect dutycycle, which is not limited by the present application.

Thus, if the uplink of the UE reaches the maximum transmit power, the network device may schedule the UE according to the symbol duty cycle of the maxuplink effective duty cycle capability item; if the UE does not reach the maximum uplink transmission power, the network device can increase the symbol duty ratio of the scheduling according to the proportion, so that the goal of meeting the regulations and not affecting the maximum uplink rate can be achieved.

For example, in the FR1 scenario, assuming that the maxuplink effective duty cycle reported by the UE is 50%, the power class of the UE is PC3 = 23dBm, i.e., the UE reaches the maximum transmit power (23 dBm), a duty cycle of 50% can be supported. If P=0, PH < =0 and Pcmax=23 in PHR reported by UE; indicating that the network equipment continuously maintains 50% of uplink scheduling symbol duty ratio when the UE reaches the maximum transmitting power; if p=0, ph > =3 and pcmax=23 in PHR reported by UE; the network equipment can know that the transmitting power of the UE is < =20, and the symbol ratio can be improved to 100%; if p=0, ph > =0 and pcmax=20 in PHR reported by UE; the network device can know that the transmitting power of the UE is < =20, and the symbol ratio can be increased to 100%.

The extended maxUplinkDutycycle capability item is applicable to the UE of PC2 and PC3 in FR1, because the maximum power reduction level of the UE of PC2 or PC3 can exceed 3dB on the basis of meeting SAR/MPE regulations under an ENDC scene or a WIFI/BT concurrence scene.

Illustratively, the definition of maxUplinkEffectiveDutyCycle at FR1 may be as shown in table 1:

TABLE 1

I.e., maxUplinkEffectiveDutyCycle, may represent the maximum effective percentage of symbols that may be scheduled for uplink transmission during a certain evaluation period (time period/interval) to ensure compliance with the electromagnetic energy absorption requirements of the regulatory authorities. This field may be applicable to both power class 2 and power class 3 UEs in FR1 specified in TS 38.101 clause 2 6.2.1. If this field does not exist, then 50% is applied by default.

Illustratively, the format of the expanded maxUp DautyCycle capability item at FR1 and FR2, respectively, can be as follows:

that is, the maxUp effective DutyCycle may include at least one of n10, n20, n30, n40, n50n60, n70, n80, n90 or n100, and the extended maxUp DutyCycle capability may include at least one of n5, n10, n15, n20, n25, n30, n40, n50, n60, n70, n80, n90 or n100 in FR 2. Wherein n5 corresponds to 5%, n10 corresponds to 10%. N100 corresponds to 100%.

2. Dynamic method: the terminal device may determine the power backoff value based on the actual uplink duty cycle and the uplink transmit power. Specifically, the UE may dynamically calculate the P-MPR required to meet the regulations within a sliding window or within a certain evaluation period (time period) according to the actual uplink scheduling and the actual transmission power. For example, the UE may dynamically adjust the undershoot based on the actual uplink duty cycle and transmit power on a series of pre-made undershoots. The dynamic method is complex to realize, but the P-MPR amplitude reduction obtained by calculation is smaller than that of the static method, and the dynamic method is more flexible.

It should be understood that, whether a static method or a dynamic method is adopted, in order to meet the electromagnetic radiation requirements of the regulatory body, the P-MPR determined by the UE in some scenarios may be very large, for example, greater than 10dB or even more than 15dB, which may cause a problem of radio link failure or even connection release. Therefore, in order to improve the performance of the static scheme and the dynamic scheme, the network device may indicate the equivalent uplink duty cycle (first information) in a period of time (time interval) to the terminal device, so that the terminal device adjusts or updates the P-MPR according to the equivalent uplink duty cycle indicated by the network device, so that the adjusted P-MPR can not only meet the regulations, but also avoid various problems caused by the oversized P-MPR, such as the problems of radio link failure and connection release. The equivalent uplink duty ratio may also be referred to as an equivalent duty ratio or an uplink duty ratio or other names, and the present application is not limited thereto.

The meaning of the equivalent uplink duty cycle may be the maximum symbol percentage that the UE can support in order to meet the regulations when the uplink reaches the maximum transmit power.

Illustratively, the definition of the equivalent uplink duty cycle over a period of time may be as shown in equation (8):

wherein N is the total number of symbols in a period of time, pmax is the maximum transmission power of the UE (excluding xMPR/A-MPR/P-MPR, etc.), P _symbol Is the actual transmit power of Symbol.

Before the network device indicates the equivalent uplink duty cycle to the terminal device, the terminal device may report first capability information to the network device, where the first capability information is used to indicate whether the terminal device determines the power backoff value according to a preset condition, or the first capability information is used to indicate whether the terminal device determines the power backoff value according to the actual uplink duty cycle and the uplink transmit power. That is, the first capability information may indicate whether the terminal device supports or adopts a static method or a dynamic method.

If the terminal capability indicates that the terminal equipment adopts a static method, the network equipment determines that the terminal equipment adopts the static method; if the terminal capability indicates that the terminal equipment adopts a dynamic method, the network equipment determines that the terminal equipment adopts the dynamic method. For example, if 1 bit is used to indicate whether the terminal device supports or adopts a static method or a dynamic method, when the bit value of the bit is 0, it indicates that the terminal device adopts the static method; when the bit value of the bit is 1, it indicates that the terminal device adopts a dynamic method. Alternatively, the default terminal device may employ a static approach and the terminal capability may indicate whether the terminal device supports or employs a dynamic approach. If the terminal capability indicates that the terminal equipment does not adopt a dynamic method, the network equipment determines that the terminal equipment adopts a static method; if the terminal capability indicates that the terminal adopts a dynamic method, the network equipment determines that the terminal equipment adopts the dynamic method. For example, if 1 bit is used to indicate whether the terminal device supports or adopts a dynamic method, when the bit value of the bit is 0, it indicates that the terminal device does not adopt the dynamic method, and since the default terminal device adopts a static method, the network device can determine that the terminal device adopts the static method; when the bit value of the bit is 1, the terminal equipment adopts a dynamic method, and the network equipment determines that the terminal equipment adopts the dynamic method.

For example, as shown in fig. 10, the network device may issue a capability query to the terminal device through RRC signaling, and after the terminal device receives the capability query, the UE capability may be reported to the network device, where the capability report indicates whether the terminal device supports or adopts a static method or a dynamic method.

For example, if RRC signaling is used to report the terminal capability, the relevant description may be specified in the protocol, for example, the description shown in table 2 may be specified in the protocol 38.306:

TABLE 2

I.e. the parameters Ue-dynamic-SAR/MPE-method can be specified in the protocol to describe whether the Ue supports a dynamic SAR/MPE adjustment scheme (i.e. dynamic method).

Also, the following description may be specified in the protocol 38.331:

wherein, the value of the Ue-dynamic-SAR/MPE-method can be preset or configured.

It should be noted that the above field names, descriptions, and numeric enumeration numbers are merely illustrative, and the present application is not limited to the above embodiments, and can be modified and adjusted without departing from the spirit of the present application.

The terminal device may also report the first capability information in the MAC CE of the PHR. For example, the terminal device may indicate whether the terminal device employs a static method or a dynamic method using one bit or a plurality of bits in Single Entry PHR MAC CE or Multiple Entry PHR MAC CE, respectively. For example, a reserved bit may be used (it will be understood that if the reserved bit is used to indicate whether the terminal device employs a static method or a dynamic method, the reserved bit is no longer a reserved bit or is no longer referred to as a reserved bit), the reserved bit may be referred to as a D bit.

As illustrated in fig. 11 and 12, when d=1, it indicates that the terminal device currently adopts a dynamic method; when d=0, it means that the terminal device adopts the static method. Wherein the position of the D bit may be selected among the reserved R bits. It should be understood that the D bit is merely an example, and in a specific implementation, the D bit may have other names or names, so long as it can be determined whether the terminal device adopts a static method or a dynamic method according to the bit, which is not specifically limited in the embodiment of the present application.

Of course, other reporting mechanisms may be adopted by the terminal device, which is not listed in the present application.

702. And the network equipment receives the PHR reported by the terminal equipment.

The network device may reversely derive the P-MPR according to the PHR reported by the terminal device, and the related process refers to the related description above, which is not described herein.

703. The network device sends the first information to the terminal device.

The first information is used for indicating the ratio of the sum of uplink channel power of the terminal equipment in N time units to the sum of maximum transmitting power of the terminal equipment in the N time units, and N is an integer greater than or equal to 1. Wherein the time unit may be a symbol or a time slot, for example.

The first information may be carried in at least one of first DCI or first RRC signaling, where the first DCI or the first RRC signaling is obtained based on TDD uplink and downlink subframe matching. Alternatively, the first information is carried in at least one of a second DCI or a second RRC signaling or a MAC CE, which is preconfigured.

Illustratively, the first information is the equivalent uplink duty cycle mentioned above. The network device may implicitly or explicitly indicate an equivalent uplink duty cycle. The network device can reduce the energy required by the scheduling of the terminal device by reducing the scheduling priority of the terminal device, or implicitly indicate or implicitly adjust the equivalent uplink duty cycle by reducing the scheduling times of the terminal device.

The network device may display the indication of the equivalent uplink duty cycle in the following manner:

mode one: based on the layering subframe proportioning mode in the TDD mechanism, the purpose of dynamically indicating the equivalent uplink duty ratio can be achieved through a user-level RRC configuration parameter (first RRC), such as TDD-UL-DL-ConfigDedimated, or through modifying the group SFI configuration. It should be understood that the premise of the first mode is that a subframe configuration at a cell level includes F subframes/symbols (flexible slots/symbols).

Optionally, the network device can modify the group SFI configuration through DCI from at 2-0 scrambled by the SFI-RNTI, so as to achieve the purpose of dynamically indicating the equivalent uplink duty ratio. However, DCI from 2-0 scrambled by SFI-RNTI is a mechanism of transmission, and it is difficult to configure for each UE (i.e., perform per UE configuration), so this method is feasible but costly.

Optionally, the network device may make the DCI (first DCI) adopt an RNTI (such as a C-RNTI) of the per UE, so as to achieve the purpose that the per UE indicates an equivalent uplink duty ratio, where the first DCI may be in a format that is a newly added DCI format or may multiplex an existing DCI format, and the present application is not limited.

When the UE calculates the P-MPR, it needs to determine whether the F subframe/symbol belongs to the uplink subframe/symbol or the downlink subframe/symbol. For example, the UE may be explicitly instructed in the protocol not to mark the F subframe/symbol as an uplink subframe/symbol or to mark the F subframe/symbol as a downlink subframe/symbol when calculating the P-MPR (when calculating the uplink duty cycle). So that the UE can mark the F subframe/symbol as the downlink subframe/symbol when calculating the P-MPR (when calculating the uplink duty cycle). However, the F subframes/symbols are configured as D (downlink) subframes/symbols, so that the F subframes that may be originally used for uplink transmission cannot be uplink transmitted, and flexibility is lost. For example, if P-MPR is not the main factor of UE maximum transmit power limitation, the network device may schedule uplink transmission on the F subframe additionally, but since the F subframe/symbol is configured as the downlink subframe/symbol, such scheduling cannot be achieved, which limits the flexibility of scheduling.

In general, the advantage of mode one is that with existing mechanisms, the protocol is basically not modified, and since the configured minimum time unit is at the symbol level, the sub-frame proportioning can almost reach any ratio. However, the first mode is unavailable under FDD, and the configuration of per UE can only be based on RRC signaling or DCI, with relatively large delay, and the first mode is to achieve the purpose of changing the uplink duty cycle by limiting the subframes that can be originally scheduled uplink, which limits certain impact to the existing scheduling mechanism, and limits the scheduling flexibility.

Mode two: an MCE CE mechanism is employed, i.e. an equivalent uplink duty cycle is indicated by the MAC CE. Exemplary, as shown in fig. 13, a schematic structural diagram of an MCE CE is shown. Wherein, R represents reserved bits, and Serving cell ID and BWP ID represent corresponding Serving cell ID and uplink BWP ID; after the MCE CE is sent, the network device may use an equivalent uplink duty ratio, where the value of the effective uplink duty ratio may be at least one of 1, 2, and 3. Wherein 1 may represent an equivalent uplink duty cycle of 5%,2 may represent an equivalent uplink duty cycle of 10%, and so on, i.e. the range of equivalent uplink duty cycle is 5% to 100%.

It should be noted that the values of the field names, bit widths and equivalent uplink duty ratios are merely illustrative, and the present application is not limited thereto, and can be modified and adjusted without departing from the spirit of the present application.

In addition, the MAC CE also needs to define a logical channel identifier (logic channel identifier, LCID), which is used to indicate the content transmitted on the logical channel, and the LCID may be carried in the MAC subheader. Illustratively, referring to the LCID list (downlink share channel, DL-SCH) of the downlink shared channel (e.g., table 6.2.1-1), the LCID may range from 33-46, such as 33, or 35, or 46. The effective time of the MAC CE may be a T period after the terminal device transmits the ACK/NACK of the PDSCH to the network device, for example, the value of T may be 3ms, 5ms, 10ms, 20ms, or the like. It should be noted that the value of T is merely illustrative, and the present application is not limited thereto, and can be modified and adjusted without departing from the spirit of the present application.

The second mode has the advantages of not affecting the existing scheduling mechanism and having larger scheduling freedom. For example, assuming that the uplink duty ratio corresponding to the atomic frame ratio is 20% (two subframes in 10 subframes are uplink subframes), if the network device configures the equivalent uplink duty ratio to be 10%, the network device may perform uplink scheduling on any one of the two uplink subframes, or may schedule two uplink subframes in one period, and may not schedule two uplink subframes in the next period. Both FDD and TDD can use mode two, and the delay generated by mode two is small.

Mode three: an RRC mechanism is employed. For example, as shown in fig. 14, the network device may issue RRC configuration information or reconfiguration information (second RRC) carrying an equivalent uplink duty cycle to the terminal device, and after the terminal device receives the RRC configuration information or reconfiguration information, the terminal device may update the P-MPR according to the equivalent uplink duty cycle carried therein, and may feed back the RRC configuration completion to the network device.

The structure of the RRC configuration information may be exemplarily as follows:

the parameter effective uplink duty ratio is used to indicate an equivalent uplink duty ratio, and the value of the parameter effective uplink duty ratio may include n5, n10 … n100.

It should be noted that the above field names (such as equivalent uplink duty ratio) and the enumerated numbers of the values are merely illustrative, and the present application is not limited thereto, and the present application can be modified and adjusted without violating the gist of the present application. The effective time of the equivalent uplink duty cycle of the RRC configuration may be after feeding back the T1 period after the RRC reconfiguration is completed to the network device, for example, the value of T1 may be 3ms, 5ms, 10ms, or 20ms, etc. It should be noted that the value of T1 is merely illustrative, and the present application is not limited thereto, and can be modified and adjusted without departing from the spirit of the present application.

In addition, other possible mechanisms such as BWP switch message may be used to indicate the equivalent uplink duty cycle, which is not listed in the present application.

In general, for a terminal device that does not support the dynamic method but can reflect the equivalent uplink duty cycle in real time, as shown in fig. 15, after the terminal device reports the P-MPR through the PHR mechanism (implicitly), the network device may display an indication of the equivalent uplink duty cycle, and the terminal device may adjust the P-MPR according to the network device display the indicated equivalent uplink duty cycle. For the UE supporting the dynamic method and capable of reflecting the equivalent uplink duty cycle in real time, as shown in fig. 16, after the terminal device reports the P-MPR through the PHR mechanism (implicit), the network device may display or implicitly indicate the equivalent uplink duty cycle, and the terminal device may adjust the P-MPR according to the equivalent uplink duty cycle displayed or implicitly indicated by the network device. This is because when the terminal device adopts the dynamic method, the network device implicitly reduces the equivalent uplink duty cycle of uplink scheduling, the scheduling of the UE is reduced, and the P-MPR can be properly reduced after a certain evaluation period. And when the terminal equipment does not support the dynamic method, the implicit reduction of the equivalent uplink duty cycle of the network equipment does not contribute to the reduction of the P-MPR by the UE.

704. The terminal device receives the first information from the network device and determines a power back-off value of the terminal device according to the first information.

I.e. the terminal device may update the P-MPR according to the equivalent uplink duty cycle indicated by the network device. For example, after the terminal device determines the power back-off value according to a preset condition (i.e. after determining the power back-off value according to a static method), the power back-off value may be updated according to the first information (equivalent uplink duty cycle); or after the terminal equipment determines the power back-off value according to the actual uplink duty cycle and the uplink transmitting power (i.e. after determining the power back-off value according to a dynamic method), updating the power back-off value according to the first information.

For the static method, the UE rolls back SAR amplitude reduction (P-MPR) according to the subframe proportion, the implicit reduction of equivalent uplink duty ratio at the network side does not help the UE to reduce the P-MPR, and the UE can roll back the amplitude reduction according to the equivalent uplink duty ratio indicated by the display at the network side. For the dynamic method, the implicit indication of the network side equivalent uplink duty cycle, and the UE can properly reduce the P-MPR after a certain evaluation period; the indication displayed by the network side is equivalent to the uplink duty ratio, and the UE can immediately fall back in proportion. That is, for the static method, the network device needs to display the indication equivalent uplink duty cycle, otherwise, the UE has difficulty in adjusting the P-MPR in time; for the dynamic method, if the network equipment implicitly reduces the equivalent uplink duty cycle, the UE needs a certain feedback time to adjust the P-MPR, and if the network equipment displays the indication equivalent uplink duty cycle, the UE can adjust the P-MPR in time.

Based on the method provided by the embodiment of the application, the terminal equipment can receive the first information (for example, equivalent uplink duty cycle) from the network equipment, and the terminal equipment determines the power back-off value of the terminal equipment according to the first information, for example, the power back-off value can be P-MPR. In this way, the terminal device can adjust the P-MPR according to the equivalent uplink duty ratio indicated by the network device, and the problems of wireless link failure or connection release and the like caused by the fact that the terminal device autonomously sets a larger P-MPR can be avoided.

In combination with the above, the present application also provides the following embodiments:

the embodiment 1 relates to a communication method, which comprises the steps that a terminal device receives first information from a network device, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal device in N time units to the sum of maximum transmitting power of the terminal device in the N time units; the terminal equipment determines a power back-off value of the terminal equipment according to the first information, wherein the power back-off value is related to the radiation absorption rate SAR. Further, the power backoff value may also be related to MPE.

Embodiment 2 is the communication method of embodiment 1, wherein the first information is carried in at least one of first downlink control information DCI or first radio resource control RRC signaling, and the first DCI or the first RRC signaling is obtained based on a time division duplex TDD uplink and downlink subframe ratio.

Embodiment 3, the communication method according to embodiment 1 or 2, wherein the first information is carried in at least one of a second DCI or a second RRC signaling or a control element MAC CE of a medium access control, the second DCI or the second RRC signaling or the MAC CE being preconfigured.

Embodiment 4 of the communication method according to any one of embodiments 1 to 3, wherein the determining, by the terminal device, a power backoff value of the terminal device according to the first information includes: after the terminal equipment determines the power back-off value according to a preset condition, updating the power back-off value according to the first information; or after the terminal equipment determines the power back-off value according to the actual uplink duty ratio and the uplink transmitting power, updating the power back-off value according to the first information.

Embodiment 5, the communication method according to embodiment 4, wherein before the terminal device receives the first information from the network device, the method further includes: the terminal equipment sends first capability information to the network equipment, wherein the first capability information is used for indicating whether the terminal equipment determines the power back-off value according to preset conditions or whether the terminal equipment determines the power back-off value according to actual uplink duty ratio and uplink transmitting power.

Embodiment 6, the communication method according to embodiment 5, wherein the terminal device sending the first capability information to the network device includes: and the terminal equipment sends a power headroom report PHR to the network equipment, wherein the PHR comprises the first capability information.

Embodiment 7 is the communication method according to embodiment 6, wherein if the PHR is a single-entity PHR MAC CE, the single-entity PHR MAC CE includes a first bit, where the first bit is used to indicate a reason that the maximum transmission power of the terminal device is lower than a preset transmission power.

Embodiment 8, the communication method according to any one of embodiments 1-7, further comprising: and the terminal equipment sends second capability information to the network equipment, wherein the second capability information is used for indicating the maximum uplink symbol percentage meeting a target rule under the condition that the uplink reaches the maximum transmitting power.

Embodiment 9, a communication method, comprising: the network device sends first information to the terminal device, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal device in N time units to the sum of maximum transmitting power of the terminal device in the N time units.

Embodiment 10 is the communication method of embodiment 9, wherein the first information is carried in at least one of first downlink control information DCI or first radio resource control RRC signaling, and the first DCI or the first RRC signaling is obtained based on a TDD uplink/downlink subframe ratio.

Embodiment 11, the communication method according to embodiment 9 or 10, wherein the first information is carried in at least one of a second DCI or a second RRC signaling or a control element MAC CE of a medium access control, the second DCI or the second RRC signaling or the MAC CE being preconfigured.

Embodiment 12, the communication method according to any one of embodiments 9-11, further comprising: the network device receives first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device determines the power back-off value according to a preset condition, or whether the terminal device determines the power back-off value according to an actual uplink duty cycle and uplink transmission power.

Embodiment 13, the communication method of embodiment 12, wherein the first capability information is carried in a power headroom report PHR.

Embodiment 14 is the communication method according to embodiment 13, wherein if the PHR is a single-entity PHR MAC CE, the single-entity PHR MAC CE includes a first bit, where the first bit is used to indicate a reason that the maximum transmission power of the terminal device is lower than a preset transmission power.

Embodiment 15, the communication method according to any one of embodiments 9-14, further comprising: the network device receives second capability information from the terminal device, where the second capability information is used to indicate a maximum uplink symbol percentage that the terminal device meets a target rule under a condition that an uplink reaches a maximum transmission power.

Embodiment 16, a communication method, comprising: the terminal equipment sends first capability information to the network equipment, wherein the first capability information is used for indicating whether the terminal equipment determines the power back-off value according to preset conditions or whether the terminal equipment determines the power back-off value according to actual uplink duty ratio and uplink transmitting power.

Embodiment 17, the communication method of embodiment 16, wherein the first capability information is carried in a power headroom report PHR.

Embodiment 18, the communication method according to embodiment 16 or 17, the method further comprising: and the terminal equipment sends second capability information to the network equipment, wherein the second capability information is used for indicating the maximum uplink symbol percentage meeting a target rule under the condition that the uplink reaches the maximum transmitting power.

Embodiment 19, a communication method, comprising: the network device receives first capability information from the terminal device, wherein the first capability information is used for indicating whether the terminal device determines the power back-off value according to preset conditions or whether the terminal device determines the power back-off value according to actual uplink duty cycle and uplink transmission power.

Embodiment 20, the communication method of embodiment 19, wherein the first capability information is carried in a power headroom report PHR.

Embodiment 21, the communication method according to embodiment 19 or 20, the method further comprising: the network device receives second capability information from the terminal device, where the second capability information is used to indicate a maximum uplink symbol percentage that the terminal device meets a target rule under a condition that an uplink reaches a maximum transmission power.

The scheme provided by the embodiment of the application is mainly introduced from the angles of the terminal equipment and the network equipment. It will be appreciated that the terminal device and the network device, in order to implement the above-mentioned functions, comprise corresponding hardware structures and/or software modules for performing the respective functions. Those of skill in the art will readily appreciate that the algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is implemented as hardware or computer software driven hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The embodiment of the application can divide the functional modules of the terminal equipment and the network equipment according to the method example, for example, each functional module can be divided corresponding to each function, and two or more functions can be integrated in one processing module. The integrated modules may be implemented in hardware or in software functional modules. It should be noted that, in the embodiment of the present application, the division of the modules is schematic, which is merely a logic function division, and other division manners may be implemented in actual implementation.

Fig. 17 shows a possible structural diagram of the terminal device 17 involved in the above-described embodiment in the case of dividing the respective functional modules with the respective functions, the terminal device including: a receiving unit 1701 and a determining unit 1702. In the embodiment of the present application, the receiving unit 1701 is configured to receive first information from a network device, where the first information is used to indicate a ratio of a sum of uplink channel powers of the terminal device in N time units to a sum of maximum transmission powers of the terminal device in N time units; a determining unit 1702 configured to determine a power back-off value of the terminal device according to the first information, where the power back-off value is related to the radiation absorption rate SAR. Optionally, the terminal device may further include a sending unit 1703, configured to send the PHR to the network device.

In the method embodiment shown in fig. 7, the receiving unit 1701 is configured to support the terminal device to perform the process 704 in fig. 7, the determining unit 1702 is configured to support the terminal device to perform the process 704 in fig. 7, and the transmitting unit 1703 is configured to support the terminal device to perform the process 701 in fig. 7.

In one possible design, the terminal device may be implemented by the structure (apparatus or system) in fig. 8.

Fig. 18 is a schematic view of a structure according to an embodiment of the present application. The architecture 1800 includes at least one processor 1801, a communication bus 1802, a memory 1803, and at least one communication interface 1804.

The processor 1801 may be a CPU, microprocessor, ASIC, or one or more integrated circuits for controlling the execution of the programs of the present application.

The communication bus 1802 may include a path to transfer information between the aforementioned components.

The communication interface 1804, uses any transceiver-like device for communicating with other devices or communication networks, such as ethernet, radio access network (radio access network, RAN), wireless local area network (wireless local area networks, WLAN), etc.

The memory 1803 may be, but is not limited to, a read-only memory (ROM) or other type of static storage device that can store static information and instructions, a random access memory (random access memory, RAM) or other type of dynamic storage device that can store information and instructions, or an electrically erasable programmable read-only memory (electrically erasable programmable read-only memory, EEPROM), a compact disc read-only memory (compact disc read-only memory) or other optical disc storage, a compact disc storage (including compact disc, laser disc, optical disc, digital versatile disc, blu-ray disc, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. The memory may be stand alone and coupled to the processor via a bus. The memory may also be integrated with the processor.

The memory 1803 is used for storing application program codes for executing the scheme of the present application, and the processor 1801 controls the execution. The processor 1801 is configured to execute application code stored in the memory 1803 to perform the functions of the method of the present application.

In a particular implementation, the processor 1801 may include one or more CPUs, such as CPU0 and CPU1 in fig. 18, as one embodiment.

In a particular implementation, structure 1800 may include multiple processors, such as processor 1801 and processor 1807 in fig. 18, as one embodiment. Each of these processors may be a single-core (single-CPU) processor or may be a multi-core (multi-CPU) processor. A processor herein may refer to one or more devices, circuits, and/or processing cores for processing data (e.g., computer program instructions).

In a particular implementation, structure 1800 may also include, for one embodiment, an output device 1805 and an input device 1806. The output device 1805 communicates with the processor 1801 and may display information in a variety of ways. For example, the output device 1805 may be a liquid crystal display (liquid crystal display, LCD), a light emitting diode (light emitting diode, LED) display device, a Cathode Ray Tube (CRT) display device, or a projector (projector), or the like. The input device 1806 is in communication with the processor 1801 and may accept user input in a variety of ways. For example, the input device 1806 may be a mouse, keyboard, touch screen device, or sensing device, among others.

In a particular implementation, the architecture 1800 may be a desktop, laptop, web server, palmtop (personal digital assistant, PDA), mobile handset, tablet, wireless terminal device, communication device, embedded device, or device having a similar architecture as in fig. 18. Embodiments of the present application are not limited to the type of structure 1800.

In some embodiments, the device 17 is specifically a chip or a system-on-chip, and the information output or received by the receiving unit 1701 and the transmitting unit 1703 may be in the form of baseband signals. For example, the receiving unit 1701 and the transmitting unit 1703 transmit or receive a baseband signal carrying the first information.

In some embodiments, when the apparatus 17 is a device, the output or the received signals of the receiving unit 1701 and the transmitting unit 1703 may be radio frequency signals. For example, the reception unit 1701 and the transmission unit 1703 transmit or receive a radio frequency signal carrying first information.

Fig. 19 shows a possible structural diagram of the network device 19 involved in the above-described embodiment in the case of dividing the respective functional modules with the respective functions, the network device including: a transmission unit 1901. In the embodiment of the application, the sending unit is configured to send first information to the terminal device, where the first information is used to indicate a ratio of a sum of uplink channel powers of the terminal device in N time units to a sum of maximum transmission powers of the terminal device in N time units. Optionally, the network device may further include a receiving unit 1902, configured to receive a PHR sent by the terminal device.

In the method embodiment shown in fig. 7, the sending unit 1901 is used for supporting the network device to perform the process 703 in fig. 7, and the receiving unit 1902 is used for supporting the network device to perform the process 702 in fig. 7.

In one possible design, the network device may be implemented by the base station in fig. 20.

As shown in fig. 20, a schematic structural diagram of a base station according to an embodiment of the present application includes a 2001 portion and a 2002 portion. The base station 2001 part is mainly used for receiving and transmitting radio frequency signals and converting the radio frequency signals and baseband signals; the 2002 part is mainly used for baseband processing, control of a base station, and the like. Section 2001 may be generally referred to as a transceiver unit, transceiver circuitry, or transceiver, etc. Section 2002 is typically the control center of the base station and may be referred to as a processing unit for controlling the base station to perform the steps described above in relation to the base station (i.e. the serving base station) in fig. 3. See for details the description of the relevant parts above.

The transceiver unit of section 2001, which may also be referred to as a transceiver, or transceiver, etc., includes an antenna and a radio frequency unit, wherein the radio frequency unit is primarily used for radio frequency processing. Alternatively, the device for realizing the receiving function in the 2001 portion may be regarded as a receiving unit, and the device for realizing the transmitting function may be regarded as a transmitting unit, that is, the 2001 portion includes the receiving unit and the transmitting unit. The receiving unit may also be referred to as a receiver, or a receiving circuit, etc., and the transmitting unit may be referred to as a transmitter, or a transmitting circuit, etc.

Section 2002 may include one or more boards, each of which may include one or more processors and one or more memories, the processors being configured to read and execute programs in the memories to implement baseband processing functions and control of the base station. If there are multiple boards, the boards can be interconnected to increase processing power. As an alternative implementation manner, the multiple boards may share one or more processors, or the multiple boards may share one or more memories, or the multiple boards may share one or more processors at the same time. The memory and the processor may be integrated or may be separately provided. In some embodiments, portions 2001 and 2002 may be integrated or may be separately provided. In addition, all functions in 2002 may be implemented in one chip, or some functions may be implemented in one chip and some functions may be implemented in one or more other chips, which is not limited in this respect.

In some embodiments, when the apparatus 19 is specifically a chip or a system-on-chip, the information output or received by the transmitting unit 1901 and the receiving unit 1902 may be in the form of baseband signals. For example, the transmission unit 1901 and the reception unit 1902 transmit or receive a baseband signal carrying first information.

In some embodiments, when the apparatus 19 is a device, the output or the reception of the transmitting unit 1901 and the receiving unit 1902 may be radio frequency signals. For example, the transmitting unit 1901 and the receiving unit 1902 transmit or receive radio frequency signals carrying first information.

The embodiment of the application also provides a computer storage medium, which comprises computer instructions, when the computer instructions run on the electronic equipment, the terminal equipment or the network equipment is caused to execute the corresponding functions or steps in the method embodiment.

The embodiment of the application also provides a computer program product, which when run on a computer, causes the computer to execute the functions or steps executed by the terminal device or the network device in the above-mentioned method embodiment.

Those skilled in the art will appreciate that in one or more of the examples described above, the functions described in the present application may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, these functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

The foregoing embodiments have been provided for the purpose of illustrating the general principles of the present application in further detail, and are not to be construed as limiting the scope of the application, but are merely intended to cover any modifications, equivalents, improvements, etc. based on the teachings of the application.

It will be appreciated by those skilled in the art that embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, embodiments of the application may take the form of a computer program product on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems) and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flowchart illustrations and/or block diagrams, and combinations of flows and/or blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.

These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.

Claims

1. A method of communication, comprising:

the method comprises the steps that a terminal device sends a power headroom report PHR to a network device, wherein the PHR is used for indicating at least one of power headroom and maximum transmitting power of the terminal device;

the terminal equipment receives first information from the network equipment, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal equipment in N time units to the sum of maximum transmitting power of the terminal equipment in the N time units;

The terminal equipment determines a power back-off value of the terminal equipment according to the first information, wherein the power back-off value is related to the radiation absorption rate SAR.

2. The communication method according to claim 1, wherein,

the first information is carried in at least one of first Downlink Control Information (DCI) or first Radio Resource Control (RRC) signaling, and the first DCI or the first RRC signaling is obtained based on Time Division Duplex (TDD) uplink and downlink subframe proportioning.

3. A communication method according to claim 1 or 2, characterized in that,

the first information is carried in at least one of a second DCI or a second RRC signaling or a control element MAC CE of a medium access control, the second DCI or the second RRC signaling or the MAC CE being preconfigured.

4. The communication method according to claim 1 or 2, wherein the determining, by the terminal device, the power backoff value of the terminal device based on the first information comprises:

after the terminal equipment determines the power back-off value according to a preset condition, updating the power back-off value according to the first information; or alternatively

And after the terminal equipment determines the power back-off value according to the actual uplink duty ratio and the uplink transmitting power, updating the power back-off value according to the first information.

5. The communication method according to claim 4, wherein before the terminal device receives the first information from the network device, the method further comprises:

the terminal equipment sends first capability information to the network equipment, wherein the first capability information is used for indicating whether the terminal equipment determines the power back-off value according to preset conditions or whether the terminal equipment determines the power back-off value according to actual uplink duty ratio and uplink transmitting power.

6. The communication method according to claim 5, wherein the terminal device transmitting first capability information to the network device includes:

and the terminal equipment sends a power headroom report PHR to the network equipment, wherein the PHR comprises the first capability information.

7. The communication method according to claim 6, wherein,

if the PHR is a single entity PHR MAC CE, the single entity PHR MAC CE includes a first bit, where the first bit is used to indicate a reason that the maximum transmission power of the terminal device is lower than a preset transmission power.

8. The communication method according to any one of claims 1, 2, 5, 6 or 7, wherein the method further comprises:

And the terminal equipment sends second capability information to the network equipment, wherein the second capability information is used for indicating the maximum uplink symbol percentage meeting a target rule under the condition that the uplink reaches the maximum transmitting power.

9. A method of communication, comprising:

the method comprises the steps that network equipment receives a power headroom report PHR from terminal equipment, wherein the PHR is used for indicating at least one of power headroom and maximum transmitting power of the terminal equipment;

and the network equipment sends first information to the terminal equipment according to the PHR, wherein the first information is used for indicating the ratio of the sum of uplink channel power of the terminal equipment in N time units to the sum of maximum transmitting power of the terminal equipment in the N time units, and the first information is used for determining a power back-off value.

10. The communication method according to claim 9, wherein,

11. A communication method according to claim 9 or 10, characterized in that,

12. A method of communicating according to claim 9 or 10, characterized in that the method further comprises:

the network device receives first capability information from the terminal device, where the first capability information is used to indicate whether the terminal device determines the power back-off value according to a preset condition, or whether the terminal device determines the power back-off value according to an actual uplink duty cycle and uplink transmission power.

13. The communication method according to claim 12, wherein,

the first capability information is carried in a power headroom report PHR.

14. The communication method according to claim 13, wherein,

15. A method of communicating according to any of claims 9, 10, 13 or 14, wherein the method further comprises:

The network device receives second capability information from the terminal device, where the second capability information is used to indicate a maximum uplink symbol percentage that the terminal device meets a target rule under a condition that an uplink reaches a maximum transmission power.

16. A communication device comprising a processor coupled to a memory, the memory having instructions stored therein, which when invoked and executed by the processor, cause the communication device to perform the communication method of any one of claims 1 to 15.

17. A computer readable storage medium comprising instructions which, when run on a computer, cause the computer to perform the communication method of any one of claims 1 to 15.