WO2019015469A1

WO2019015469A1 - Power headroom calculation method, terminal, and computer-readable storage medium

Info

Publication number: WO2019015469A1
Application number: PCT/CN2018/093980
Authority: WO
Inventors: 潘学明; 沈晓冬
Original assignee: 维沃移动通信有限公司
Priority date: 2017-07-21
Filing date: 2018-07-02
Publication date: 2019-01-24
Also published as: CN109286949B; CN109286949A

Abstract

Provided are a power headroom calculation method, a terminal, and a computer-readable storage medium. The method comprises: obtaining a first waveform type actually used during the transmission of a physical uplink channel; and calculating, according to the first waveform type, the actual power headroom of a terminal based on the first waveform type and/or the virtual power headroom of the terminal based on a second waveform type that is not actually used.

Description

Power margin calculation method, terminal and computer readable storage medium

Cross-reference to related applications

The present application claims priority to Chinese Patent Application No. JP-A No. No. No. No. No. No. No. No. No.

Technical field

The present disclosure relates to the field of communications technologies, and in particular, to a power headroom computing method, a terminal, and a computer readable storage medium.

Background technique

In the Long Term Evolution (LTE) system, the data of the data channel cannot be simultaneously transmitted in the same subframe as the data of the control channel. For example, the data of the Physical Uplink Shared Channel (PUSCH) cannot be combined with the physical. The data of the Physical Uplink Control Channel (PUCCH) is simultaneously transmitted in the same subframe. The user equipment (UE) reports the power headroom (PH) report of the PUSCH to the base station. When the base station receives the power headroom report sent by the UE in a certain subframe, the base station can report the power headroom according to the power headroom report. The power headroom value obtained is used to obtain the power headroom when the UE transmits data on the PUSCH. When the base station subsequently schedules the radio resources, the base station needs to refer to the power headroom value to prevent the excessive resources from being allocated to the UE. The UE enters a power limited state when the PUSCH transmits data.

In the traditional LTE system, the power headroom report (PHR) in the LTE system is further divided into a first type PHR (type 1) and a second type (type 2) PHR, respectively, for PUSCH only (PUSCH only). Transmission situation, and simultaneous transmission of PUSCH and PUCCH. The uplink transmission only supports a single-carrier frequency division multiple access (SC-FDMA) waveform, and the uplink power control adopts an open-loop + closed-loop combination.

In the fifth generation (5 Generation) communication system, or the New Radio (NR) system, the PUSCH supports Orthogonal Frequency Division Multiple Access (OFDMA) and SC-FDMA. Waveform. Then, the PWR calculation and feedback of a single waveform in the related art cannot accurately reflect the power headroom calculation under the mixed use scenarios of the two waveforms, and cannot satisfy the scheduling requirement of the mixed use of the two waveforms.

Summary of the invention

In a first aspect, an embodiment of the present disclosure provides a method for calculating a power headroom, which is applied to a terminal side, and includes:

Obtaining a first waveform type actually used by the physical uplink channel transmission;

Determining, according to the first waveform type, an actual power headroom based on the first waveform type and/or a virtual power headroom based on a second waveform type that is not actually used by the terminal;

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is the first waveform selected by at least two transmission waveforms supported by the terminal. The other type than the type.

In a second aspect, an embodiment of the present disclosure further provides a terminal, including:

a first acquiring module, configured to acquire a first waveform type actually used by the physical uplink channel transmission;

a first calculating module, configured to calculate, according to the first waveform type, an actual power headroom based on the first waveform type and/or a virtual power headroom based on a second waveform type that is not actually used by the terminal;

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is other than the first waveform type of at least two transmission waveforms supported by the terminal. The other one.

In a third aspect, an embodiment of the present disclosure provides a terminal, including a processor, a memory, and a computer program stored on the memory and executable on the processor, and the processor performs the power headroom calculation as described above when executing the computer program. The steps of the method.

In a fourth aspect, an embodiment of the present disclosure provides a computer readable storage medium having a computer program stored thereon, the computer program being executed by a processor to implement the steps of the power headroom calculation method as described above.

DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings to be used in the description of the embodiments of the present disclosure will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present disclosure. Other drawings may also be obtained from those of ordinary skill in the art based on these drawings without the inventive labor.

1 is a schematic flow chart showing a power headroom calculation method according to an embodiment of the present disclosure;

2 is a schematic structural diagram of a module of a terminal according to an embodiment of the present disclosure;

FIG. 3 shows a block diagram of a terminal of an embodiment of the present disclosure.

Detailed ways

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While the embodiments of the present invention have been shown in the drawings, the embodiments Rather, these embodiments are provided so that this disclosure will be more fully understood and the scope of the disclosure will be fully disclosed.

The terms "first", "second" and the like in the specification and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a particular order or order. It is to be understood that the data so used may be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in a sequence other than those illustrated or described herein. In addition, the terms "comprises" and "comprises" and "the" and "the" are intended to cover a non-exclusive inclusion, for example, a process, method, system, product, or device that comprises a series of steps or units is not necessarily limited to Those steps or units may include other steps or units not explicitly listed or inherent to such processes, methods, products or devices.

The power headroom calculation method of the embodiment of the present disclosure is applied to the terminal side, as shown in FIG. 1, and specifically includes the

following steps

11 and 12.

Step 11: Acquire the first waveform type actually used by the physical uplink channel transmission.

Specifically, step 11 includes: acquiring a first waveform type actually used by the physical uplink channel transmission in a time domain transmission unit of the serving cell to which the terminal belongs. The time domain transmission unit is one subframe, one slot, one mini slot or one time domain transmission symbol (OFDM symbol).

The terminal may be a wireless terminal or a wired terminal, and the wireless terminal may be a device that provides voice and/or other service data connectivity to the user, a handheld device with a wireless connection function, or other processing device connected to the wireless modem. . The wireless terminal can communicate with one or more core networks via a Radio Access Network (RAN), which can be a mobile terminal, such as a mobile phone (or "cellular" phone) and a mobile terminal. The computer, for example, can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device that exchanges language and/or data with the wireless access network. For example, Personal Communication Service (PCS) telephone, cordless telephone, Session Initiation Protocol (SIP) telephone, Wireless Local Loop (WLL) station, personal digital assistant (Personal) Digital Assistant, PDA for short. The wireless terminal may also be referred to as a system, a subscriber unit, a subscriber station, a mobile station, a mobile station, a remote station, a remote terminal, and a remote terminal. The access terminal, the user terminal (User Terminal), the user agent (User Agent), and the user device (User Device or User Equipment) are not limited herein.

Step 12: Calculate, according to the first waveform type, an actual power headroom based on the first waveform type and/or a virtual power headroom based on the second waveform type that is not actually used by the terminal.

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is one of the at least two transmission waveforms supported by the terminal except the first waveform type. For example, the at least two transmission waveforms supported by the terminal include: a single carrier frequency division multiple access SC-FDMA waveform and an orthogonal frequency division multiple access OFDMA waveform, and the first waveform type is one of an SC-FDMA waveform and an OFDMA waveform. The second waveform type is another of the SC-FDMA waveform and the OFDMA waveform.

In the power headroom calculation method of the embodiment of the present disclosure, the terminal transmits the first waveform type actually used by acquiring the physical uplink channel, and calculates the actual power headroom based on the first waveform type and/or the terminal based on the first waveform type. A virtual power headroom of a second waveform type that is not actually used to obtain a more accurate power headroom report, reporting the power headroom report to the network device, so that the network device can perform resource scheduling according to a more accurate power headroom report .

The power headroom calculation method of the embodiment of the present disclosure will be further described below in combination with different application scenarios.

In the LTE system, the terminal transmits the PUSCH by using the SC-FDMA waveform, and the transmission power P _PUSCH,c (i) of the terminal in a time domain transmission unit i (such as subframe i) of the serving cell c can pass the following formula. (1) Calculated:

Wherein, P _PUSCH,c (i) represents the transmission power of the terminal in a time domain transmission unit i (eg, subframe i) of the serving cell c; P _cmax,c (i) represents the subframe i of the terminal in the serving cell c maximum transmit power within; M _{PUSCH, c} (i) represents corresponding to the PUSCH transmitted by the terminal in the serving cell c subframe i frequency number domain resource, RB-unit; P _{O_PUSCH, c} (j) represents a terminal in the service The open loop power target value of the PUSCH transmitted in the subframe i of the cell c, where j=0, 1 or 2, j represents the PUSCH transmission type, j=0 represents the semi-persistently scheduled PUSCH transmission, and j=1 represents the dynamic scheduling PUSCH transmission, j=2 represents a PUSCH transmission carrying a random access message three (message 3); α _c (j) represents a path loss compensation factor of a PUSCH of a different transmission type on the serving cell c, for j=0 or 1, α _c ∈{0,0.4,0.5,0.6,0.7,0.8,0.9,1}, for j=2, α _c =1; PL _c represents the path loss measurement value on the serving cell c, Δ _TF,c (i Indicates the power adjustment amount associated with the PUSCH, and f _c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c. Among them, it is worth pointing out that the calculation unit of the above formula is dBm.

In an LTE system, a terminal needs to report a power headroom report to enable a network device to better schedule subsequent PUSCH transmissions. The power headroom reporting (PHR) in the LTE system is further divided into a first type power headroom reporting (type1 PHR) and a second type power headroom reporting (PU1 only) transmission scenario and PUSCH and PUCCH simultaneous transmission scenarios ( Type2 PHR).

Specifically, the following calculation scenarios are divided for the type 1 PHR:

Scenario 1. If only the PUSCH is transmitted in the subframe i of the service c, the type1 PHR is calculated according to the following formula (2):

The calculation unit of the above formula is dB, and the meanings of the above parameters are the same as those in the calculation formula of the foregoing transmit power P _PUSCH,c (i), and therefore are not described herein.

Scenario 2: If PUSCH and PUCCH are simultaneously transmitted for subframe i in serving cell c, then type1 PHR is calculated according to the following formula (3):

among them,

It is assumed that the maximum transmission power when the terminal transmits only the PUSCH in the time domain transmission unit i of the serving cell c is calculated according to the assumption that only the PUSCH is transmitted in the subframe i, and the remaining parameters are the same as in the foregoing power control formula.

Scenario 3: If only the PUCCH is transmitted for the subframe i in the serving cell c, since the PUSCH is not transmitted, the virtual PHR of the PUSCH is actually calculated. Then type1 PHR is calculated according to the following formula (4):

among them

Calculated according to the assumption that MPR=0dB, A-MPR=0dB, P-MPR=0dB, T _C =0dB, and the remaining parameters are the same as above.

The calculation of the type 1 PHR in different scenarios is described above. The following describes the calculation of the type 2 PHR in different scenarios.

Scenario 4: If the terminal transmits the PUSCH and the PUCCH simultaneously in the subframe i on the serving cell c, the Type 2 PHR is calculated according to the following formula (5):

Wherein, the calculation unit of the above formula is dB, and the expression in parentheses is divided into two parts, the first part is the actual transmission power of the PUSCH in the subframe i on the serving cell c, and the second part is the PUCCH on the same carrier and the subframe. Actual transmit power.

Scenario 5: If the terminal i transmits only the PUSCH in the subframe i on the serving cell c, but does not transmit the PUCCH, the type 2 PHR is calculated according to the following formula (6):

Wherein, the calculation unit of the above formula is dB, and the expression in parentheses is divided into two parts, the first part is the actual transmission power of the PUSCH in the subframe i on the serving cell c, and the second part is the PUCCH on the same carrier and the subframe. Virtual transmit power.

Scenario 6. If the UE transmits only the PUCCH in the subframe i on the serving cell c, but does not send the PUSCH, the type 2 PHR is calculated according to the following formula (7):

Wherein, the calculation unit of the above formula is dB, and the expression in parentheses is divided into two parts, the first part is the virtual transmission power of the PUSCH in the subframe i on the serving cell c, and the second part is the PUSCH on the same carrier and the subframe. Actual transmit power.

Scenario VII. If the subframe i of the terminal on the serving cell c not only transmits the PUSCH but also does not transmit the PUCCH, the type 2 PHR is calculated according to the following formula (8):

Wherein, the calculation unit of the above formula is dB, and the expression in parentheses is divided into two parts, the first part is the virtual transmission power of the PUSCH in the subframe i on the serving cell c, and the second part is the PUSCH on the same carrier and the subframe. Virtual transmit power.

The above describes the calculation method of PHR in various scenarios in which the PUSCH and/or PUCCH are transmitted in a single waveform type in the LTE system. The following embodiment will introduce a different waveform type in the PUSCH and/or PUCCH in the NR system. The way the PHR is calculated when transmitting.

Specifically, step 12 specifically includes: calculating, according to the first waveform type, an actual power headroom based on the first waveform type, and/or calculating a virtual power headroom based on the second waveform type according to the first waveform type.

Specifically, when the first waveform type is an SC-FDMA waveform and the second waveform type is an OFDMA waveform, step 12 specifically includes: calculating an actual power headroom of the terminal based on the SC-FDMA waveform according to the actually used SC-FDMA waveform; And/or, based on the actually used SC-FDMA waveform, calculate the virtual power headroom of the terminal based on the OFDMA waveform that is not actually used. When the first waveform type is an OFDMA waveform and the second waveform type is an SC-FDMA waveform, step 12 specifically includes: calculating an actual power headroom based on the OFDMA waveform according to the actually used OFDMA waveform; and/or, according to actual use. The OFDMA waveform is calculated by the terminal based on the virtual power headroom of the SC-FDMA waveform that is not actually used.

The physical uplink channel includes a PUSCH and a PUCCH. According to the first waveform type, the step of calculating the actual power margin of the terminal based on the first waveform type is that the terminal is based on a time domain transmission unit i in a serving cell c (eg, The type of waveform used for the actual PUSCH transmission on frame i/slot i), and the actual PHR for that waveform type of the subframe i/slot i is calculated. For example, if the PUSCH transmission waveform of the terminal on the subframe i is SC-FDMA, the maximum transmission power P _{cmax_S,c} (i) transmitted by the terminal through the SC-FDMA waveform in the subframe i is obtained according to the SC-FDMA waveform, and the terminal is in the sub-frame. The transmit power P _{PUSCH_S,c} (i) of the PUSCH is transmitted through the SC-FDMA waveform in the frame i, thereby obtaining the power headroom PH _S,c (i) of the terminal based on the SC-FDMA waveform transmission.

Specifically, in the case of type1, when the physical uplink channel is the physical uplink shared channel PUSCH, the step of calculating the actual power headroom of the terminal based on the SC-FDMA waveform according to the actually used SC-FDMA waveform includes:

When only the physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the actual power headroom PH _{type1_S,c of the} terminal based on the actually used SC-FDMA waveform is calculated by the following formula (9). i);

Where PH _{type1_S,c} (i) represents the actual power headroom of the terminal when the terminal actually transmits the PUSCH using the SC-FDMA waveform; P _{cmax_S,c} (i) represents the maximum of the terminal in the time domain transmission unit i of the serving cell c Transmit power; M _{PUSCH_S,c} (i) represents the number of frequency domain resources of the PUSCH actually transmitted by the terminal in the time domain transmission unit i of the serving cell c; P _{O_PUSCH_S,c} (j) indicates that the terminal is in the serving cell The open-loop power target value of the PUSCH is actually transmitted using the SC-FDMA waveform in the time domain transmission unit i of c, j represents the transmission type of the PUSCH, j=0, 1 or 2; α _S,c (j) represents different transmission types The path loss compensation factor of the PUSCH on the serving cell c; PL _c represents the path loss measurement value on the serving cell c; Δ _{TF_S,c} (i) represents the power adjustment amount associated with the PUSCH; f _S,c (i) represents the service The closed loop power control command accumulated value in the time domain transmission unit i of the cell c.

For another example, if the PUSCH transmission waveform of the terminal on the subframe i is OFDMA, the maximum transmit power P _{cmax_O,c} (i) transmitted by the terminal through the OFDMA waveform in the subframe i is obtained according to the OFDMA waveform _, and the terminal passes the OFDMA in the subframe i. The waveform transmits the transmit power P _{PUSCH_O,c} (i) of the PUSCH, thereby obtaining the power headroom PH _O,c (i) of the terminal based on the OFDMA waveform transmission.

Specifically, taking the type 1 as an example, when the physical uplink channel is the physical uplink shared channel PUSCH, the step of calculating the actual power headroom of the terminal based on the OFDMA waveform according to the actually used OFDMA waveform includes:

When only the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the actual power headroom PH _{type1_O,c} (i) of the OFDMA waveform that the terminal uses based on the actual use is calculated by the following formula (10). ;

Where PH _{type1_O,c} (i) represents the actual power headroom of the terminal when the terminal actually transmits the PUSCH using the OFDMA waveform; P _{cmax_O,c} (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c M _{PUSCH_O,c} (i) represents the number of frequency domain resources in which the terminal actually uses the OFDMA to transmit the PUSCH in the time domain transmission unit i of the serving cell c; P _{O_PUSCH_O,c} (j) represents the time domain transmission unit of the terminal in the serving cell c The open-loop power target value of the PUSCH transmitted by OFDMA is used, i represents the transmission type of the PUSCH, j=0, 1 or 2; α _O,c (j) represents the path loss compensation of the PUSCH of different transmission types on the serving cell c. Factor; PL _c represents the path loss measurement value on the serving cell c; Δ _{TF_O, c} (i) represents the power adjustment amount associated with the PUSCH; f _O,c (i) represents the closed loop in the time domain transmission unit i of the serving cell c Power control command cumulative value.

Similarly, the terminal calculates the actual PHR of the subframe i/sloti for the waveform type according to the type of the waveform actually used by the PUCCH on a time domain transmission unit i (eg, subframe i/slot i) in a serving cell c. . For example, if the PUSCH transmission waveform of the terminal on the subframe i is SC-FDMA, the maximum transmission power P _{cmax_S,c} (i) transmitted by the terminal through the SC-FDMA waveform in the subframe i is obtained according to the SC-FDMA waveform, and the terminal is in the sub-frame. The transmit power P _{PUCCH_S,c} (i) of the PUCCH is transmitted through the SC-FDMA waveform in the frame i, thereby obtaining the power headroom PH _S,c (i) of the terminal based on the SC-FDMA waveform transmission. For another example, if the PUCCH transmission waveform of the terminal on the subframe i is OFDMA, the maximum transmit power P _{cmax_O,c} (i) transmitted by the terminal through the OFDMA waveform in the subframe i is obtained according to the OFDMA waveform _, and the terminal passes the OFDMA in the subframe i. The waveform transmits the transmission power P _{PUCCH_O,c} (i) of the PUCCH, thereby obtaining the power headroom PH _O,c (i) of the terminal based on the OFDMA waveform transmission. It is worth noting that the power headroom calculation method for the PUCCH and the power balance calculation mode for the PUSCH are not described herein.

On the other hand, according to the first waveform type, the step of calculating the virtual power margin of the second waveform type that is not actually used by the terminal is that the terminal is not practical according to the PUSCH on one subframe i/slot i in one serving cell c. The waveform used for transmission is calculated, and the virtual PHR of the sub-frame i/sloti for the waveform is calculated. For example, the PUSCH transmission waveform of the terminal on the subframe i is an SC-FDMA waveform, and the terminal obtains the maximum virtual transmission power P _{cmax_O, c} (i) and the terminal transmitted by the terminal through the OFDMA waveform in the subframe i according to another waveform OFDMA waveform. The virtual transmit power P _{PUSCH_O,c} (i) of the PUSCH is transmitted through the OFDMA waveform in the subframe i, thereby obtaining the virtual power margin PH _O,c (i) transmitted by the terminal based on the OFDMA waveform.

Specifically, taking the type 1 as an example, when the physical uplink channel is the physical uplink shared channel PUSCH, the step of calculating the virtual power margin of the terminal based on the non-actually used OFDMA waveform according to the actually used SC-FDMA waveform includes:

When only the physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the virtual power margin PH _{type1_O of the} terminal based on the OFDMA waveform that is not actually used is calculated by the following formula (11) _{, c} (i);

Wherein, PH _{type1_O,c} (i) indicates that when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c; P _{O_PUSCH_O,c} (1) indicates that the terminal passes in the time domain transmission unit i of the serving cell c The open-loop power target value of the non-actually used OFDMA waveform transmission dynamically scheduled PUSCH; α _O,c (1) represents the path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c; f _O,c (i) represents The closed loop power control command accumulated value in the time domain transmission unit i of the serving cell c.

For another example, the PUSCH transmission waveform of the terminal on the subframe i is an OFDMA waveform, and the terminal obtains the maximum virtual transmission power P _{cmax_S,c} (i) transmitted by the terminal through the SC-FDMA waveform in the subframe i according to another waveform SC-FDMA waveform. And the terminal transmits the virtual transmit power P _{PUSCH_S,c} (i) of the PUSCH through the SC-FDMA waveform in the subframe i, thereby obtaining the virtual power margin PH _S,c (i) of the terminal based on the SC-FDMA waveform transmission.

Specifically, taking the type 1 as an example, when the physical uplink channel is the physical uplink shared channel PUSCH, the step of calculating the virtual power margin of the terminal based on the non-actually used SC-FDMA waveform according to the actually used OFDMA waveform includes:

When only the physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the virtual power margin PH _{type1_S of the} terminal based on the non-actually used SC-FDMA waveform is calculated by the following formula (12) _{, c} (i);

Wherein, PH _{type1_S,c} (i) indicates that when the terminal actually transmits the PUSCH using the OFDMA waveform, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform;

Indicates the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c; P _{O_PUSCH_S,c} (1) indicates the time domain transmission unit i of the terminal in the serving cell c The open loop power target value when the dynamically scheduled PUSCH is transmitted through the non-actually used SC-FDMA waveform; α _S,c (1) represents the path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c; f _S,c (i) shows the closed loop power control command accumulated value in the time domain transmission unit i of the serving cell c.

Similarly, the terminal calculates the type of the subframe i/slot i for the waveform type according to the type of the waveform used by the PUCCH for non-actual transmission on a time domain transmission unit i (eg, subframe i/slot i) in a serving cell c. Virtual PHR. For example, the PUSCH transmission waveform of the terminal on the subframe i is an SC-FDMA waveform, and the terminal obtains the maximum virtual transmission power P _{cmax_O, c} (i) and the terminal transmitted by the terminal through the OFDMA waveform in the subframe i according to another waveform OFDMA waveform. The virtual transmit power P _{PUCCH_O,c} (i) of the PUCCH is transmitted through the OFDMA waveform in the subframe i, thereby obtaining the virtual power margin PH _O,c (i) transmitted by the terminal based on the OFDMA waveform. For another example, the PUCCH transmission waveform of the terminal on the subframe i is an OFDMA waveform, and the terminal obtains the maximum virtual transmission power P _{cmax_S,c} (i) transmitted by the terminal through the SC-FDMA waveform in the subframe i according to another waveform SC-FDMA waveform. And the terminal transmits the virtual transmit power P _{PUCCH_S,c} (i) of the PUCCH through the SC-FDMA waveform in the subframe i, thereby obtaining the virtual power margin PH _S,c (i) of the terminal based on the SC-FDMA waveform transmission. It is worth noting that the virtual power headroom calculation method for the PUCCH and the virtual power margin calculation mode for the PUSCH are not described here.

Further, after step 12, the power headroom calculating method of the embodiment of the present disclosure further includes: according to the actual power headroom based on the first waveform type and/or the virtual power headroom based on the second waveform type that is not actually used, Generate a power headroom report and report it to the network device. Wherein, the actual power headroom based on the first waveform type includes an actual power headroom based on the SC-FDMA waveform and/or an actual power headroom based on the OFDMA waveform. The virtual power headroom based on the second waveform type includes a virtual power headroom based on the SC-FDMA waveform and/or a virtual power headroom based on the OFDMA waveform. The terminal reports the accurate power headroom report to the network device, so that the network device can perform resource scheduling according to a more accurate power headroom report.

The network device may be a Global System of Mobile communication (GSM) or a Code Division Multiple Access (CDMA) base station (Base Transceiver Station, BTS for short) or a wideband code. A base station (NodeB, NB for short) in the Wideband Code Division Multiple Access (WCDMA), and may also be an evolved Node B (eNB or eNodeB) in LTE, or a relay station or an access point. Or a base station or the like in a future 5G network is not limited herein.

Further, when there is no corresponding physical uplink channel transmission in a time domain transmission unit i of the serving cell c, there is no corresponding physical uplink channel transmission, including: a scenario without any physical uplink channel transmission, and a physical uplink without a specified type. Channel transmission. Before the step of reporting the generated power headroom report to the network device, the power headroom calculation method of the present disclosure further includes: acquiring a second waveform type that is not actually used by the physical uplink channel transmission; and according to the second waveform type, the computing terminal is based on The virtual power headroom of the second waveform type.

Taking the power headroom of the terminal PUSCH as an example, only the PUCCH scenario is transmitted in one time domain transmission unit i of the serving cell c. When the second waveform type is an SC-FDMA waveform, according to the second waveform type, the step of calculating the virtual power margin of the terminal based on the second waveform type is specifically: according to the non-actually used SC-FDMA waveform, the computing terminal is based on the SC- The virtual power headroom of the FDMA waveform.

Specifically, taking type1 as an example, when only one PUCCH is transmitted in one time domain transmission unit i of the serving cell c, according to the non-actually used SC-FDMA waveform, the step of calculating the virtual power margin of the terminal based on the SC-FDMA waveform includes:

Calculating the virtual power headroom PH _{type1_S,c} (i) of the terminal based on the non-actually used SC-FDMA waveform by the following formula (13);

Wherein, PH _{type1_S,c} (i) indicates that when only one PUCCH is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform;

Or, when the second waveform type is an OFDMA waveform, according to the second waveform type, the step of calculating the virtual power margin of the terminal based on the second waveform type is specifically: calculating the terminal based on the OFDMA waveform according to the OFDMA waveform that is not actually used. Virtual power headroom.

Specifically, taking type1 as an example, when only one PUCCH is transmitted in one time domain transmission unit i of the serving cell c, according to the OFDMA waveform that is not actually used, the step of calculating the virtual power margin of the terminal based on the OFDMA waveform includes:

Calculating the virtual power headroom PH _{type1_O,c} (i) of the terminal based on the non-actually used OFDMA waveform by the following formula (fourteen);

Wherein, PH _{type1_O,c} (i) indicates that when only one PUCCH is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Similarly, when calculating the power headroom of the terminal PUCCH, there is no PUCCH transmission scenario in one time domain transmission unit i of the serving cell c, or only a PUSCH scenario in a time domain transmission unit i of the serving cell c, and may also refer to The method for calculating the power headroom of the PUSCH is implemented, and therefore will not be described herein.

The terminal of the embodiment of the present disclosure acquires a first waveform type used for physical uplink channel transmission, and calculates an actual power headroom of the terminal based on the first waveform type and/or a virtual power balance of the terminal based on the second waveform type according to the first waveform type. The amount is used to obtain a more accurate power headroom report, and the power headroom report is reported to the network device, so that the network device can perform resource scheduling according to a more accurate power headroom report.

The above embodiment describes the power headroom calculation method in different scenarios. The terminal corresponding to it will be further introduced below with reference to the accompanying drawings.

As shown in FIG. 2, the terminal 200 of the embodiment of the present disclosure can implement the first waveform type actually used for acquiring the physical uplink channel transmission in the foregoing embodiment; and according to the first waveform type, calculate the actual power balance of the terminal based on the first waveform type. The quantity and/or the terminal is based on the details of the virtual power headroom method of the second waveform type that is not actually used, and achieves the same effect. The terminal 200 specifically includes the following functional modules:

The first obtaining module 210 is configured to acquire a first waveform type actually used by the physical uplink channel transmission;

The first calculating module 220 is configured to calculate, according to the first waveform type, an actual power headroom based on the first waveform type of the terminal and/or a virtual power headroom based on the second waveform type that is not actually used by the terminal;

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is one of the at least two transmission waveforms supported by the terminal except the first waveform type.

The first obtaining module 210 includes:

An acquiring unit, configured to acquire a first waveform type actually used by a physical uplink channel transmission in a time domain transmission unit of the serving cell to which the terminal belongs;

The time domain transmission unit is a subframe, a time slot, a minislot or a time domain transmission symbol.

The at least two transmission waveforms supported by the terminal include: a single carrier frequency division multiple access SC-FDMA waveform and an orthogonal frequency division multiple access OFDMA waveform.

The first calculation module 220 includes:

a first calculating unit, configured to: when the first waveform type is an SC-FDMA waveform, and the second waveform type is an OFDMA waveform, calculate an actual power headroom of the terminal based on the SC-FDMA waveform according to the actually used SC-FDMA waveform; and /or,

And a second calculating unit, configured to calculate, according to the actually used SC-FDMA waveform, a virtual power margin of the terminal based on the OFDMA waveform that is not actually used.

The first computing unit is specifically configured to:

If the physical uplink channel is the physical uplink shared channel PUSCH, when only the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the actual calculation of the actual SC-FDMA waveform based on the terminal is calculated by the following formula. Power headroom PH _{type1_S,c} (i);

Wherein, PH _{type1_S,c} (i) represents the actual power headroom of the terminal when the SC-FDMA waveform actually used by the terminal transmits the PUSCH;

P _{cmax_S,c} (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M _{PUSCH_S,c} (i) represents the number of frequency domain resources in which the terminal actually transmits the PUSCH using the SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P _{O_PUSCH_S,c} (j) represents the open-loop power target value of the PUSCH actually transmitted by the terminal in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α _S,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL _c represents the path loss measurement value on the serving cell c;

Δ _{TF_S,c} (i) represents the amount of power adjustment associated with the PUSCH;

f _S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.

The second computing unit is specifically configured to:

If the physical uplink channel is the physical uplink shared channel PUSCH, when only the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the virtual power of the terminal based on the OFDMA waveform that is not actually used is calculated by the following formula. Balance PH _{type1_O,c} (i);

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

P _{O_PUSCH_O,c} (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

α _O,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f _O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.

The first calculation module 220 includes:

a third calculating unit, configured to: when the first waveform type is an OFDMA waveform, and the second waveform type is an SC-FDMA waveform, calculate an actual power headroom based on the OFDMA waveform according to the actually used OFDMA waveform; and/or,

And a fourth calculating unit, configured to calculate, according to the actually used OFDMA waveform, a virtual power margin of the terminal based on the SC-FDMA waveform that is not actually used.

The third computing unit is specifically configured to:

If the physical uplink channel is the physical uplink shared channel PUSCH, when only one physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the actual power surplus of the terminal based on the actually used OFDMA waveform is calculated by the following formula. Quantity PH _{type1_O,c} (i);

Wherein, PH _{type1_O,c} (i) represents the actual power headroom of the terminal when the terminal actually transmits the PUSCH using the OFDMA waveform;

P _{cmax_O,c} (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M _{PUSCH_O,c} (i) represents the number of frequency domain resources in which the terminal actually uses the OFDMA to transmit the PUSCH in the time domain transmission unit i of the serving cell c;

P _{O_PUSCH_O,c} (j) represents an open-loop power target value of the terminal actually transmitting the PUSCH using the OFDMA in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α _O,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL _c represents the path loss measurement value on the serving cell c;

Δ _{TF_O,c} (i) represents the amount of power adjustment associated with the PUSCH;

Wherein, the fourth calculating unit is specifically configured to:

If the physical uplink channel is the physical uplink shared channel PUSCH, when only the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal calculates the SC-FDMA waveform based on the non-actual use by the following formula. Virtual power headroom PH _{type1_S,c} (i);

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P _{O_PUSCH_S,c} (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

α _S,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

The terminal 200 further includes:

And a processing module, configured to generate a power headroom report and report to the network device according to the actual power headroom based on the first waveform type and/or the virtual power headroom based on the second waveform type.

The terminal 200 further includes:

a second acquiring module, configured to acquire a second waveform type that is not actually used by the physical uplink channel transmission;

And a second calculating module, configured to calculate, according to the second waveform type, a virtual power margin of the terminal based on the second waveform type.

The second calculation module includes:

And a fifth calculating unit, configured to calculate a virtual power margin of the terminal based on the SC-FDMA waveform according to the non-actually used SC-FDMA waveform when the second waveform type is an SC-FDMA waveform.

The fifth computing unit is specifically configured to:

When only the PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, the virtual power margin PH _{type1_S,c} (i) of the terminal based on the non-actually used SC-FDMA waveform is calculated by the following formula;

The second calculation module includes:

And a sixth calculating unit, configured to calculate a virtual power margin of the terminal based on the OFDMA waveform according to the OFDMA waveform that is not actually used when the second waveform type is an OFDMA waveform.

The sixth computing unit is specifically configured to:

When only the PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, the virtual power margin PH _{type1_O,c} (i) of the terminal based on the OFDMA waveform that is not actually used is calculated by the following formula;

It is worth noting that the terminal of the embodiment of the present disclosure calculates the first waveform type used by the physical uplink channel transmission, and calculates the actual power headroom based on the first waveform type and/or the terminal based on the second waveform according to the first waveform type. A type of virtual power headroom is used to obtain a more accurate power headroom report, and the power headroom report is reported to the network device, so that the network device can perform resource scheduling according to a more accurate power headroom report.

It should be noted that the division of each module of the foregoing terminal is only a division of a logical function. In actual implementation, it may be integrated into one physical entity in whole or in part, or may be physically separated. And these modules can all be implemented by software in the form of processing component calls; or all of them can be implemented in hardware form; some modules can be realized by processing component calling software, and some modules are realized by hardware. For example, the determining module may be a separately set processing element, or may be integrated in one of the above-mentioned devices, or may be stored in the memory of the above device in the form of program code, by a processing element of the above device. Call and execute the functions of the above determination module. The implementation of other modules is similar. In addition, all or part of these modules can be integrated or implemented independently. The processing elements described herein can be an integrated circuit that has signal processing capabilities. In the implementation process, each step of the above method or each of the above modules may be completed by an integrated logic circuit of hardware in the processor element or an instruction in a form of software.

For example, the above modules may be one or more integrated circuits configured to implement the above method, such as one or more Application Specific Integrated Circuits (ASICs), or one or more microprocessors ( A digital signal processor (DSP), or one or more Field Programmable Gate Arrays (FPGAs). For another example, when one of the above modules is implemented in the form of a processing component scheduler code, the processing component may be a general purpose processor, such as a central processing unit (CPU) or other processor that can call the program code. As another example, these modules can be integrated and implemented in the form of a system-on-a-chip (SOC).

In order to better achieve the above object, an embodiment of the present disclosure further provides a terminal, including a processor, a memory, and a computer program stored on the memory and operable on the processor, and the processor implements the computer program as described above. The steps in the power head calculation method. The embodiment of the present disclosure further provides a computer readable storage medium having a computer program stored thereon, the computer program being executed by the processor to implement the steps of the power headroom calculation method as described above.

Specifically, FIG. 3 is a block diagram of a terminal 300 according to another embodiment of the present disclosure. The terminal shown in FIG. 3 includes at least one processor 301, a memory 302, a user interface 303, and a network interface 304. The various components in terminal 300 are coupled together by a bus system 305. It will be appreciated that the bus system 305 is used to implement connection communication between these components. The bus system 305 includes a power bus, a control bus, and a status signal bus in addition to the data bus. However, for clarity of description, various buses are labeled as bus system 305 in FIG.

Wherein, the user interface 303 can include a display or a pointing device (eg, a touchpad or touch screen, etc.).

It is to be understood that the memory 302 in an embodiment of the present disclosure may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory may be a read-only memory (ROM), a programmable read only memory (PROM), an erasable programmable read only memory (Erasable PROM, EPROM), or an electric Erase programmable read only memory (EEPROM) or flash memory. The volatile memory can be a Random Access Memory (RAM) that acts as an external cache. By way of example and not limitation, many forms of RAM are available, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (Synchronous DRAM). SDRAM), Double Data Rate Synchronous Dynamic Random Access Memory (DDRSDRAM), Enhanced Synchronous Dynamic Random Access Memory (ESDRAM), Synchronous Connection Dynamic Random Access Memory (SDRAM) And direct memory bus random access memory (DRRAM). The memory 302 of the systems and methods described herein is intended to comprise, without being limited to, these and any other suitable types of memory.

In some embodiments, memory 302 stores elements, executable modules or data structures, or a subset thereof, or their extended set: operating system 3021 and application 3022.

The operating system 3021 includes various system programs, such as a framework layer, a core library layer, a driver layer, and the like, for implementing various basic services and processing hardware-based tasks. The application 3022 includes various applications, such as a media player (Media Player), a browser, and the like, for implementing various application services. A program implementing the method of the embodiments of the present disclosure may be included in the application 3022.

In an embodiment of the present disclosure, the terminal 300 further includes: a computer program stored on the memory 302 and executable on the processor 301, and specifically, may be a computer program in the application 3022, the computer program being executed by the processor 301 And implementing the following steps: acquiring a first waveform type actually used by the physical uplink channel transmission; and calculating, according to the first waveform type, an actual power headroom based on the first waveform type and/or the second waveform type of the terminal based on the non-actual use Virtual power headroom. The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is one of the at least two transmission waveforms supported by the terminal except the first waveform type.

The method disclosed in the above embodiments of the present disclosure may be applied to the processor 301 or implemented by the processor 301. Processor 301 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the foregoing method may be completed by an integrated logic circuit of hardware in the processor 301 or an instruction in a form of software. The processor 301 may be a general-purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA), or the like. Programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps, and logical block diagrams disclosed in the embodiments of the present disclosure may be implemented or carried out. The general purpose processor may be a microprocessor or the processor or any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present disclosure may be directly implemented by the hardware decoding processor, or may be performed by a combination of hardware and software modules in the decoding processor. The software module can be located in a conventional storage medium such as random access memory, flash memory, read only memory, programmable read only memory or electrically erasable programmable memory, registers, and the like. The storage medium is located in the memory 302, and the processor 301 reads the information in the memory 302 and completes the steps of the above method in combination with its hardware.

It will be appreciated that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in one or more Application Specific Integrated Circuits (ASICs), Digital Signal Processing (DSP), Digital Signal Processing Equipment (DSP Device, DSPD), programmable Programmable Logic Device (PLD), Field-Programmable Gate Array (FPGA), general purpose processor, controller, microcontroller, microprocessor, other for performing the functions described herein In an electronic unit or a combination thereof.

For a software implementation, the techniques described herein can be implemented by modules (eg, procedures, functions, and so on) that perform the functions described herein. The software code can be stored in memory and executed by the processor. The memory can be implemented in the processor or external to the processor.

Specifically, when the computer program is executed by the processor 301, the following steps may be further: acquiring a first waveform type actually used by the physical uplink channel transmission in a time domain transmission unit of the serving cell to which the terminal belongs;

Specifically, the at least two transmission waveforms supported by the terminal include: a single carrier frequency division multiple access SC-FDMA waveform and an orthogonal frequency division multiple access OFDMA waveform.

Wherein, when the first waveform type is an SC-FDMA waveform and the second waveform type is an OFDMA waveform, when the computer program is executed by the processor 301, the following steps may be implemented: according to the actually used SC-FDMA waveform, the computing terminal is based on the SC- The actual power headroom of the FDMA waveform; and/or,

Based on the actually used SC-FDMA waveform, the virtual power margin of the terminal based on the OFDMA waveform that is not actually used is calculated.

Specifically, when the physical uplink channel is the physical uplink shared channel PUSCH, when the computer program is executed by the processor 301, the following steps may be further implemented: when the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs At the time, the actual power headroom PH _{type1_S,c} (i) of the terminal based on the actually used SC-FDMA waveform is calculated by the following formula;

Where PH _{type1_S,c} (i) represents the actual power headroom of the terminal when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH;

PL _c represents the path loss measurement value on the serving cell c;

Specifically, when the physical uplink channel is the physical uplink shared channel PUSCH, when the computer program is executed by the processor 301, the following steps may be further implemented: when the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs At the time, the virtual power margin PH _{type1_O,c} (i) of the terminal based on the non-actually used OFDMA waveform is calculated by the following formula;

Specifically, when the first waveform type is an OFDMA waveform and the second waveform type is an SC-FDMA waveform, when the computer program is executed by the processor 301, the following steps may be further implemented: calculating the terminal based on the OFDMA waveform according to the actually used OFDMA waveform. Actual power headroom; and/or,

Based on the actually used OFDMA waveform, the virtual power margin of the terminal based on the SC-FDMA waveform that is not actually used is calculated.

Specifically, when the physical uplink channel is the physical uplink shared channel PUSCH, when the computer program is executed by the processor 301, the following steps may be further implemented: when the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs At the time, the actual power headroom PH _{type1_O,c} (i) of the terminal based on the actually used OFDMA waveform is calculated by the following formula;

PL _c represents the path loss measurement value on the serving cell c;

Specifically, when the physical uplink channel is the physical uplink shared channel PUSCH, when the computer program is executed by the processor 301, the following steps may be further implemented: when the physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs At the time, the virtual power margin PH _{type1_S,c} (i) of the terminal based on the non-actually used SC-FDMA waveform is calculated by the following formula;

Specifically, when the computer program is executed by the processor 301, the following steps may be further implemented: generating a power headroom report according to an actual power headroom based on the first waveform type and/or a virtual power headroom based on the second waveform type, and reporting to Network equipment.

Specifically, when the computer program is executed by the processor 301, the following steps may be further implemented: acquiring a second waveform type that is not actually used by the physical uplink channel transmission;

According to the second waveform type, the virtual power margin of the terminal based on the second waveform type is calculated.

Specifically, when the second waveform type is an SC-FDMA waveform, when the computer program is executed by the processor 301, the following steps may be further implemented: calculating the virtual power balance of the terminal based on the SC-FDMA waveform according to the SC-FDMA waveform that is not actually used. the amount.

Specifically, when only the PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, when the computer program is executed by the processor 301, the following steps may be implemented: calculating the SC-FDMA waveform based on the non-actual use by the terminal by using the following formula: Virtual power headroom PH _{type1_S,c} (i);

Specifically, when the second waveform type is an OFDMA waveform, the computer program may be further executed by the processor 301 to calculate a virtual power margin based on the OFDMA waveform of the terminal according to the OFDMA waveform that is not actually used.

Specifically, when only the PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, when the computer program is executed by the processor 301, the following steps may be implemented: calculating the virtual power of the terminal based on the OFDMA waveform that is not actually used by using the following formula: Balance PH _{type1_O,c} (i);

Those of ordinary skill in the art will appreciate that the elements and algorithm steps of the various examples described in connection with the embodiments disclosed herein can be implemented in electronic hardware or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the solution. A person skilled in the art can use different methods to implement the described functions for each particular application, but such implementation should not be considered to be beyond the scope of the present disclosure.

A person skilled in the art can clearly understand that, for the convenience and brevity of the description, the specific working process of the system, the device and the unit described above can refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

In the embodiments provided by the present application, it should be understood that the disclosed apparatus and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative. For example, the division of the unit is only a logical function division. In actual implementation, there may be another division manner, for example, multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in various embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

The functions may be stored in a computer readable storage medium if implemented in the form of a software functional unit and sold or used as a standalone product. Based on such understanding, the portion of the technical solution of the present disclosure that contributes in essence or to the prior art or the portion of the technical solution may be embodied in the form of a software product stored in a storage medium, including The instructions are used to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in various embodiments of the present disclosure. The foregoing storage medium includes various media that can store program codes, such as a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.

In addition, it should be noted that in the apparatus and method of the present disclosure, it is apparent that various components or steps may be decomposed and/or recombined. These decompositions and/or recombinations should be considered as equivalents to the present disclosure. Also, the steps of performing the above-described series of processes may naturally be performed in chronological order in the order illustrated, but need not necessarily be performed in chronological order, and some steps may be performed in parallel or independently of each other. It will be appreciated by those skilled in the art that all or any of the steps or components of the methods and apparatus of the present disclosure may be in a network of any computing device (including a processor, storage medium, etc.) or computing device, in hardware, firmware The software, or a combination thereof, is implemented by those of ordinary skill in the art using their basic programming skills while reading the description of the present disclosure.

Thus, the objects of the present disclosure can also be achieved by running a program or a set of programs on any computing device. The computing device can be a well-known general purpose device. Accordingly, the objects of the present disclosure may also be realized by merely providing a program product including program code for implementing the method or apparatus. That is to say, such a program product also constitutes the present disclosure, and a storage medium storing such a program product also constitutes the present disclosure. It will be apparent that the storage medium may be any known storage medium or any storage medium developed in the future. It should also be noted that in the apparatus and method of the present disclosure, it is apparent that various components or steps may be decomposed and/or recombined. These decompositions and/or recombinations should be considered as equivalents to the present disclosure. Also, the steps of performing the series of processes described above may naturally be performed in chronological order in the order illustrated, but need not necessarily be performed in chronological order. Certain steps may be performed in parallel or independently of one another.

The above is an alternative embodiment of the present disclosure, and it should be noted that those skilled in the art can also make several improvements and retouchings without departing from the principles of the present disclosure. Within the scope of protection of the present disclosure.

Claims

A power headroom calculation method is applied to the terminal side, including:

Obtaining a first waveform type actually used by the physical uplink channel transmission;

Calculating, according to the first waveform type, an actual power headroom of the terminal based on the first waveform type and/or a virtual power headroom of the terminal based on a non-actually used second waveform type;

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is the first waveform selected by at least two transmission waveforms supported by the terminal. The other type than the type.
The power headroom calculation method according to claim 1, wherein the step of acquiring a first waveform type actually used by the physical uplink channel transmission comprises:

Obtaining a first waveform type actually used by a physical uplink channel transmission in a time domain transmission unit of the serving cell to which the terminal belongs;

The time domain transmission unit is a subframe, a time slot, a minislot or a time domain transmission symbol.
The power headroom calculation method according to claim 1, wherein the at least two transmission waveforms supported by the terminal comprise: a single carrier frequency division multiple access SC-FDMA waveform and an orthogonal frequency division multiple access OFDMA waveform.
The power headroom calculating method according to claim 3, wherein when said first waveform type is an SC-FDMA waveform and said second waveform type is an OFDMA waveform, said calculating said said first waveform type The step of the terminal based on the actual power headroom of the first waveform type and/or the virtual power headroom of the terminal based on the non-actually used second waveform type includes:

Calculating an actual power headroom of the terminal based on the SC-FDMA waveform according to an actually used SC-FDMA waveform; and/or,

The virtual power headroom of the terminal based on the OFDMA waveform that is not actually used is calculated according to the actually used SC-FDMA waveform.
The power headroom calculation method according to claim 4, wherein when the physical uplink channel is a physical uplink shared channel PUSCH, the calculating the terminal based on the SC-FDMA waveform according to the actually used SC-FDMA waveform The steps of the actual power headroom include:

When only the physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the actual power headroom PH type1_S,c of the terminal based on the actually used SC-FDMA waveform is calculated by the following formula: (i);

PH type1_S,c (i)

=P cmax_S,c (i)

-{10log 10 (M PUSCH_S,c (i))+P O_PUSCH_S,c (j)+α S,c (j)·PL c

+Δ TF_S,c (i)+f S,c (i)}

Wherein, PH type1_S,c (i) indicates the actual power headroom of the terminal when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH;

P cmax_S,c (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M PUSCH_S,c (i) represents the number of frequency domain resources in which the terminal actually transmits the PUSCH using the SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (j) represents the open-loop power target value of the PUSCH actually transmitted by the terminal in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α S,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL c represents the path loss measurement value on the serving cell c;

Δ TF_S,c (i) represents the amount of power adjustment associated with the PUSCH;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The power headroom calculation method according to claim 4, wherein when the physical uplink channel is a physical uplink shared channel PUSCH, the calculating, based on an actually used SC-FDMA waveform, the OFDMA based on the non-actual use of the terminal The steps of the virtual power headroom of the waveform include:

When only one physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the virtual power margin PH type1_O,c (i) based on the non-actually used OFDMA waveform is calculated by the following formula by the following formula: );

Wherein, PH type1_O,c (i) indicates that when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

α O,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The power headroom calculating method according to claim 3, wherein when said first waveform type is an OFDMA waveform and said second waveform type is an SC-FDMA waveform, said calculating according to said first waveform type The step of the terminal based on the actual power headroom of the first waveform type and/or the virtual power headroom of the second waveform type that is not actually used by the terminal includes:

Calculating an actual power headroom of the terminal based on the OFDMA waveform according to an actually used OFDMA waveform; and/or,

The virtual power headroom of the terminal based on the SC-FDMA waveform that is not actually used is calculated according to the actually used OFDMA waveform.
The power headroom calculation method according to claim 7, wherein when the physical uplink channel is a physical uplink shared channel PUSCH, the actual power of the terminal based on the OFDMA waveform is calculated according to an actually used OFDMA waveform. The steps of the balance include:

When only the physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the actual power headroom PH type1_O,c (i) of the OFDMA waveform based on the actual use of the terminal is calculated by the following formula: );

PH type1_O,c (i)

=P cmax_O,c (i)

-{10log 10 (M PUSCH_O,c (i))+P O_PUSCH_O,c (j)+α O,c (j)·PL c

+Δ TF_O,c (i)+f O,c (i)}dB

Wherein, PH type1_O,c (i) indicates the actual power headroom of the terminal when the terminal actually transmits the PUSCH using the OFDMA waveform;

P cmax_O,c (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M PUSCH_O,c (i) represents the number of frequency domain resources in which the terminal actually uses the OFDMA to transmit the PUSCH in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (j) represents an open-loop power target value of the terminal actually transmitting the PUSCH using the OFDMA in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α O,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL c represents the path loss measurement value on the serving cell c;

Δ TF_O,c (i) represents the amount of power adjustment associated with the PUSCH;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The power headroom calculation method according to claim 7, wherein when the physical uplink channel is a physical uplink shared channel PUSCH, the calculating, based on an actually used OFDMA waveform, the SC-FDMA based on the non-actual use of the terminal The steps of the virtual power headroom of the waveform include:

When only one physical uplink shared channel is transmitted in one time domain transmission unit i of the serving cell c to which the terminal belongs, the virtual power margin PH type1_S of the terminal based on the non-actually used SC-FDMA waveform is calculated by the following formula , c (i);

Wherein, PH type1_S,c (i) indicates that when the terminal actually transmits the PUSCH using the OFDMA waveform, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

α S,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The power headroom calculating method according to claim 3, wherein, based on the first waveform type, calculating an actual power headroom of the terminal based on the first waveform type and/or the terminal is based on non-actual use After the step of the virtual power headroom of the second waveform type, the method further includes:

A power headroom report is generated and reported to the network device based on the actual power headroom based on the first waveform type and/or the virtual power headroom based on the second waveform type.
The power headroom calculating method according to claim 10, wherein the power headroom report is generated and reported to the network according to the actual power headroom based on the first waveform type and/or the virtual power headroom based on the second waveform type Before the steps of the device, it also includes:

Obtaining a second waveform type that is not actually used by the physical uplink channel transmission;

Calculating, according to the second waveform type, a virtual power margin based on the second waveform type of the terminal.
The power headroom calculating method according to claim 11, wherein when the second waveform type is an SC-FDMA waveform, the calculating, based on the second waveform type, the virtuality of the terminal based on the second waveform type The steps of power headroom include:

The virtual power headroom based on the SC-FDMA waveform of the terminal is calculated according to the SC-FDMA waveform that is not actually used.
The power headroom calculating method according to claim 12, wherein when the PUCCH is transmitted only in a time domain transmission unit of the serving cell to which the terminal belongs, the terminal calculates the terminal according to the SC-FDMA waveform that is not actually used. The steps of virtual power headroom based on SC-FDMA waveforms include:

Calculating, by using the following formula, the virtual power headroom PH type1_S,c (i) of the terminal based on the non-actually used SC-FDMA waveform;

The PH type 1_S,c (i) indicates that when the PUCCH is transmitted only in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform. ;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

α S,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The power headroom calculating method according to claim 11, wherein when the second waveform type is an OFDMA waveform, the calculating, based on the second waveform type, the virtual power remaining based on the second waveform type The steps of quantity, including:

The virtual power headroom based on the OFDMA waveform of the terminal is calculated according to the OFDMA waveform that is not actually used.
The power headroom calculation method according to claim 14, wherein when the PUCCH is transmitted only in one time domain transmission unit of the serving cell to which the terminal belongs, the terminal is calculated based on the OFDMA according to the OFDMA waveform that is not actually used. The steps of the virtual power headroom of the waveform include:

Calculating, by using the following formula, a virtual power headroom PH type1_O,c (i) of the terminal based on the OFDMA waveform that is not actually used;

The PH type 1_0, c (i) indicates that when the PUCCH is transmitted only in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

α O,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
A terminal comprising:

a first acquiring module, configured to acquire a first waveform type actually used by the physical uplink channel transmission;

a first calculating module, configured to calculate, according to the first waveform type, an actual power headroom of the terminal based on the first waveform type and/or a virtual power balance of the second waveform type that is not actually used by the terminal the amount;

The first waveform type is one of at least two transmission waveforms supported by the terminal, and the second waveform type is the first waveform selected by at least two transmission waveforms supported by the terminal. The other type than the type.
The terminal according to claim 16, wherein the first obtaining module comprises:

An acquiring unit, configured to acquire a first waveform type actually used by a physical uplink channel transmission in a time domain transmission unit of the serving cell to which the terminal belongs;

The time domain transmission unit is a subframe, a time slot, a minislot or a time domain transmission symbol.
The terminal of claim 16, wherein the at least two transmission waveforms supported by the terminal comprise: a single carrier frequency division multiple access SC-FDMA waveform and an orthogonal frequency division multiple access OFDMA waveform.
The terminal of claim 18, wherein the first computing module comprises:

a first calculating unit, configured to: when the first waveform type is an SC-FDMA waveform, and the second waveform type is an OFDMA waveform, calculate, according to an actually used SC-FDMA waveform, the terminal is based on the SC-FDMA The actual power headroom of the waveform; and/or,

And a second calculating unit, configured to calculate, according to the actually used SC-FDMA waveform, a virtual power margin of the terminal based on the OFDMA waveform that is not actually used.
The terminal according to claim 19, wherein the first calculating unit is specifically configured to:

If the physical uplink channel is a physical uplink shared channel PUSCH, when only one physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal is calculated based on actual use by using the following formula: Actual power headroom of SC-FDMA waveform PH type1_S,c (i);

PH type1_S,c (i)

=P cmax_S,c (i)

-{10log 10 (M PUSCH_S,c (i))+P O_PUSCH_S,c (j)+α S,c (j)·PL c

+Δ TF_S,c (i)+f S,c (i)}

Wherein, PH type1_S,c (i) indicates the actual power headroom of the terminal when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH;

P cmax_S,c (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M PUSCH_S,c (i) represents the number of frequency domain resources in which the terminal actually transmits the PUSCH using the SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (j) represents the open-loop power target value of the PUSCH actually transmitted by the terminal in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α S,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL c represents the path loss measurement value on the serving cell c;

Δ TF_S,c (i) represents the amount of power adjustment associated with the PUSCH;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The terminal according to claim 19, wherein the second calculating unit is specifically configured to:

If the physical uplink channel is a physical uplink shared channel PUSCH, when only one physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal is calculated based on non-actual use by the following formula: Virtual power headroom of the OFDMA waveform PH type1_O,c (i);

Wherein, PH type1_O,c (i) indicates that when the terminal actually uses the SC-FDMA waveform to transmit the PUSCH, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

α O,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The terminal of claim 18, wherein the first computing module comprises:

a third calculating unit, configured to: when the first waveform type is an OFDMA waveform, and the second waveform type is an SC-FDMA waveform, calculate an actual power headroom of the terminal based on the OFDMA waveform according to the actually used OFDMA waveform; and /or,

And a fourth calculating unit, configured to calculate, according to the actually used OFDMA waveform, a virtual power margin of the terminal based on the SC-FDMA waveform that is not actually used.
The terminal according to claim 22, wherein the third calculating unit is specifically configured to:

If the physical uplink channel is a physical uplink shared channel PUSCH, when only one physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal is calculated based on actual use by using the following formula. The actual power headroom of the OFDMA waveform PH type1_O,c (i);

PH type1_O,c (i)

=P cmax_O,c (i)

-{10log 10 (M PUSCH_O,c (i))+P O_PUSCH_O,c (j)+α O,c (j)·PL c

+Δ TF_O,c (i)+f O,c (i)}dB

Wherein, PH type1_O,c (i) represents the actual power headroom of the terminal when the terminal actually transmits the PUSCH using the OFDMA waveform;

P cmax_O,c (i) represents the maximum transmit power of the terminal in the time domain transmission unit i of the serving cell c;

M PUSCH_O,c (i) represents the number of frequency domain resources in which the terminal actually uses the OFDMA to transmit the PUSCH in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (j) represents an open-loop power target value of the terminal actually transmitting the PUSCH using the OFDMA in the time domain transmission unit i of the serving cell c; j represents the transmission type of the PUSCH, j=0, 1 or 2;

α O,c (j) represents a path loss compensation factor of the PUSCH of different transmission types on the serving cell c;

PL c represents the path loss measurement value on the serving cell c;

Δ TF_O,c (i) represents the amount of power adjustment associated with the PUSCH;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The terminal according to claim 22, wherein the fourth calculating unit is specifically configured to:

If the physical uplink channel is a physical uplink shared channel PUSCH, when only one physical uplink shared channel is transmitted in a time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal is calculated based on non-actual use by the following formula: Virtual power headroom of SC-FDMA waveform PH type1_S,c (i);

Wherein, PH type1_S,c (i) indicates that when the terminal actually transmits the PUSCH using the OFDMA waveform, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

α S,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The terminal of claim 18, further comprising:

And a processing module, configured to generate a power headroom report and report to the network device according to the actual power headroom based on the first waveform type and/or the virtual power headroom based on the second waveform type.
The terminal of claim 25, further comprising:

a second acquiring module, configured to acquire a second waveform type that is not actually used by the physical uplink channel transmission;

And a second calculating module, configured to calculate, according to the second waveform type, a virtual power margin of the terminal based on the second waveform type.
The terminal of claim 26, wherein the second computing module comprises:

And a fifth calculating unit, configured to calculate a virtual power margin of the terminal based on the SC-FDMA waveform according to the non-actually used SC-FDMA waveform when the second waveform type is an SC-FDMA waveform.
The terminal according to claim 27, wherein the fifth calculating unit is specifically configured to:

When only the PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, the virtual power margin PH type1_S,c (i) of the terminal based on the non-actually used SC-FDMA waveform is calculated by the following formula;

The PH type 1_S,c (i) indicates that when the PUCCH is transmitted only in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the non-actually used SC-FDMA waveform. ;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_S,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used SC-FDMA waveform in the time domain transmission unit i of the serving cell c;

α S,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f S,c (i) represents the cumulative value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
The terminal of claim 26, wherein the second computing module comprises:

And a sixth calculating unit, configured to calculate a virtual power margin of the terminal based on the OFDMA waveform according to the OFDMA waveform that is not actually used when the second waveform type is an OFDMA waveform.
The terminal according to claim 29, wherein the sixth calculating unit is specifically configured to:

When only one PUCCH is transmitted in a time domain transmission unit of the serving cell to which the terminal belongs, the virtual power margin PH type1_O,c (i) of the terminal based on the OFDMA waveform that is not actually used is calculated by the following formula;

The PH type 1_0, c (i) indicates that when the PUCCH is transmitted only in one time domain transmission unit i of the serving cell c to which the terminal belongs, the terminal transmits the virtual power margin of the PUSCH through the OFDMA waveform that is not actually used;

Representing the maximum transmit power when the terminal transmits the PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

P O_PUSCH_O,c (1) represents an open loop power target value when the terminal transmits the dynamically scheduled PUSCH through the non-actually used OFDMA waveform in the time domain transmission unit i of the serving cell c;

α O,c (1) represents a path loss compensation factor of the dynamically scheduled PUSCH on the serving cell c;

f O,c (i) represents the accumulated value of the closed loop power control command in the time domain transmission unit i of the serving cell c.
A terminal comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, wherein the processor executes the computer program to implement any one of claims 1 to 15 The steps of the power headroom calculation method.
A computer readable storage medium, wherein the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the power headroom calculation method according to any one of claims 1 to A step of.