CN109392070B

CN109392070B - Method and apparatus for sending a signal

Info

Publication number: CN109392070B
Application number: CN201710687047.3A
Authority: CN
Inventors: 李军; 铁晓磊; 焦淑蓉; 张鹏; 王轶
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2017-08-11
Filing date: 2017-08-11
Publication date: 2021-05-11
Anticipated expiration: 2037-08-11
Also published as: CN109392070A; WO2019029653A1

Abstract

The present application discloses a method for sending a signal, which includes: a sending end sends a reference signal to a receiving end, and the transmission power of the reference signal is P ₁ ; the sending end sends a data signal to the receiving end, and the transmission power of the data signal is P ₂ ; The transmitting end sends the reference signal to the receiving end again, the retransmission power of the reference signal is P ₃ , P ₃ is greater than P ₁ , and the absolute value of the difference between P ₃ and P ₁ is Δ1; Sending the data signal, the retransmission power of the data signal is P ₄ , P ₄ is greater than or equal to P ₂ , the absolute value of the difference between P ₄ and P ₂ is Δ2, and Δ2 is less than Δ1. According to the method, using a smaller power ramping step size for the data signal can reduce the interference to other devices caused by the excessive transmission power of the data signal, and at the same time, increase the transmission power of the reference signal and repeatedly transmit the reference signal. The signal and data signal can enhance the transmission reliability of the reference signal and the data signal.

Description

Method and device for transmitting signal

Technical Field

The present application relates to the field of communications, and in particular, to a method and an apparatus for transmitting signals in the field of wireless communications.

Background

The grant-free is the fifth generation (the 5)^thgeneration, 5G) mobile communication system, a terminal device transmitting in an authorization-free manner can directly send information on a preset transmission resource without waiting for resource scheduling information of a network device, thereby having a characteristic of low time delay.

In order to improve the success rate of uplink transmission of the terminal device, the terminal device may repeatedly transmit data corresponding to one transmission block until the terminal device determines that the transmission of the transmission block is successful, or until the transmission frequency reaches the maximum transmittable frequency of the terminal device. Obviously, compared with a grant-based transmission method, the number of times of transmitting data through the grant-free transmission method is greatly increased, which greatly increases interference to other devices, and therefore, how to reduce the influence on other devices while not affecting the reliability of the grant-free transmission is an urgent problem to be solved.

Disclosure of Invention

The application provides a method and a device for sending signals, which can reduce the interference of the signals sent by a sending end to other equipment while not influencing the reliability of the unauthorized transmission.

In a first aspect, a method for transmitting a signal is provided, including: a sending end sends a reference signal to a receiving end, and the transmitting power of the reference signal is P₁(ii) a A sending end sends a data signal to a receiving end, and the transmitting power of the data signal is P₂(ii) a The sending end sends the reference signal to the receiving end again, and the retransmission power of the reference signal is P₃，P₃Greater than P₁And P is₃And P₁The absolute value of the difference of (a) is Δ 1; the sending end sends the data signal to the receiving end again, and the retransmission power of the data signal is P₄，P₄Greater than or equal to P₂，P₄And P₂The absolute value of the difference of (a) is Δ 2, and Δ 2 is smaller than Δ 1.

Because the reference signal is generally an orthogonal signal, the interference of increasing the transmission power to other devices is small, and the interference of increasing the power to other devices is large, according to the method for transmitting signals provided by the application, the interference to other devices caused by the excessive transmission power of the data signal can be reduced by adopting a small power ramp step for the data signal, and meanwhile, the transmission reliability of the reference signal and the data signal can be enhanced by increasing the transmission power of the reference signal and repeatedly transmitting the reference signal and the data signal.

Optionally, before the sending end sends the data signal to the receiving end again, the method further includes: the transmitting end determines that the transmitting power which is not received by the receiving end is P₁The reference signal of (1).

The transmitting end may start to increase the transmission power of the reference signal after determining that the receiving end does not receive the reference signal, so that energy consumption of the transmitting end may be reduced.

Optionally, the sending end determines that the receiving end does not receive the transmission power as P₁The reference signal of (2), comprising: the method comprises the steps that a sending end receives first indication information from a receiving end, wherein the first indication information is used for indicating that the receiving end does not receive a reference signal; the sending end determines that the transmitting power which is not received by the receiving end is P according to the first indication information₁The reference signal of (1).

Any information that can indicate that the receiving end does not receive the reference signal can be referred to as first indication information, and the sending end can accurately determine that the receiving end does not receive the reference signal according to the first indication information.

Optionally, the reference signal is a demodulation reference signal of the data signal, and the reference signal is further used for identifying the transmitting end.

Optionally, the method further comprises: the sending end determines that the receiving end receives the transmitting power P₃And the transmitting end determines that the transmitting power is P when the receiving end does not receive the transmitting power₄The data signal of (1); the transmitting end sends the transmitting power P to the receiving end again₃The reference signal of (1).

In this embodiment, the transmitting end may not increase the transmission power of the reference signal after determining that the receiving end receives the reference signal, so that energy consumption of the transmitting end may be reduced.

Optionally, the sending end determines that the receiving end has received the transmission power P₃The reference signal of (2), comprising: the sending end receives second indication information from the receiving end, wherein the second indication information is used for indicating that the receiving end receives the reference signal and does not receive the data signal; the sending end determines that the receiving power of the receiving end is P according to the second indication information₃And the receiving end does not receive the reference signal with the transmitting power P₄The data signal of (1).

Any information that can indicate the receiving end to receive the reference signal and not receive the data signal can be referred to as second indication information, and the sending end can accurately determine that the receiving end receives the reference signal and not receives the data signal according to the second indication information.

Optionally, the method further comprises: the sending end is according to M and P_nDetermining P_n+1M is a threshold value of the number of transmissions, P_nTransmit power, P, for the nth transmission of the reference signal_n+1M, K and n are positive integers, wherein when n is less than or equal to M, P is the transmission power of the n +1 th transmission of the reference signal_nLess than P_n+1Or, when n is greater than or equal to M, P_nIs equal to P_n+1。

The method provided by this embodiment can avoid meaningless increase of the transmission power of the reference signal by the transmitting end under some special conditions, for example, the transmitting end fails to detect the second indication information, or the receiving end cannot receive the reference signal for a long time due to poor channel quality.

Optionally, the method further comprises: the sending end sends power information to the receiving end, and the power information is used for indicating the power difference value of the reference signal and the data signal.

The method provided by the embodiment can improve the success rate of decoding the data signal by the receiving end.

In a second aspect, a device for sending a signal is provided, where the device may implement the function performed by the terminal device in the method according to the first aspect, where the function may be implemented by hardware, or may be implemented by hardware executing corresponding software. The hardware or software includes one or more units or modules corresponding to the above functions.

In one possible design, the apparatus structurally includes a processor and a transceiver, and the processor is configured to support the apparatus to perform the corresponding functions in the method according to the first aspect. The transceiver is for supporting communication between the apparatus and other network elements. The apparatus may also include a memory, coupled to the processor, that retains program instructions and data necessary for the apparatus.

In a third aspect, the present application further provides a network system, where the network system includes the apparatus for sending a signal according to the second aspect and a receiving end for receiving the signal sent by the apparatus.

In a fourth aspect, a computer-readable storage medium is provided, having stored therein computer program code, which, when executed by a processing unit or processor, causes a network device to perform the method of the first aspect.

In a fifth aspect, a communication chip is provided, in which instructions are stored, which, when run on a terminal device, cause the communication chip to perform the method of the first aspect described above.

In a sixth aspect, there is provided a computer program product comprising: computer program code which, when run by a communication unit or transceiver and a processing unit or processor of the terminal device, causes the network device to perform the method of the first aspect described above.

Drawings

FIG. 1 is a communication system suitable for use with the present application;

FIG. 2 is a schematic diagram of locations of time-frequency resources that may be occupied by reference signals and data signals in the present application;

FIG. 3 is a schematic diagram of a method of transmitting a signal provided herein;

FIG. 4 is a schematic diagram of another method of transmitting a signal provided herein;

FIG. 5 is a schematic diagram of yet another method of transmitting a signal provided herein;

FIG. 6 is a schematic diagram of yet another method of transmitting a signal provided herein;

FIG. 7 is a schematic diagram of a possible terminal device provided in the present application;

fig. 8 is a schematic diagram of another possible terminal device provided in the present application.

Detailed Description

The technical solution in the present application will be described below with reference to the accompanying drawings.

Fig. 1 shows a communication system to which the present application is applicable. The communication system comprises a network device and a terminal device, wherein the network device and the terminal device communicate through a wireless network, when the terminal device sends information, a wireless communication module of the terminal device can acquire information bits to be sent to the network device through a channel, and the information bits are generated by a processing module of the terminal device, received from other devices or stored in a storage module of the terminal device.

In this application, a terminal device may be referred to as an access terminal, User Equipment (UE), subscriber unit, subscriber station, mobile station, remote terminal, mobile device, user terminal, wireless communication device, user agent, or user equipment. An access terminal may be a cellular telephone, a handheld device with wireless communication capabilities, a computing device or other processing device connected to a wireless modem, an in-vehicle device, a wearable device, and a user device in a 5G communication system.

The network device may be a Base Transceiver Station (BTS) in a Code Division Multiple Access (CDMA) system, a base station (node B, NB) in a Wideband Code Division Multiple Access (WCDMA) system, an evolved node B (eNB) in a Long Term Evolution (LTE) system, or a base station (gNB) in a 5G communication system, where the base stations are merely examples, and the network device may also be a relay station, an access point, a vehicle-mounted device, a wearable device, and other types of devices.

The above-mentioned communication system applicable to the present application is only an example, and the communication system applicable to the present application is not limited thereto, for example, the number of network devices and terminal devices included in the communication system may also be other numbers, and the communication system applicable to the present application may also be an end-to-end (D2D) communication system.

Fig. 2 is a schematic diagram illustrating locations of time-frequency resources that may be occupied by reference signals and data signals in the present application.

Each small square in fig. 2 represents a Resource Element (RE), and the transmitting end continuously transmits the reference signal and the data signal K times in an authorization-free manner, where the reference signal K times is the same, and the data signal K times is the same. It should be understood that the above-mentioned identity refers to that the functions or purposes of the signals are the same, for example, the redundancy versions corresponding to the data signal transmitted for the first time and the data signal transmitted for the second time may be different, but the two data signals correspond to the same transport block, and then the two transmitted data signals may be considered as the same data signal; for another example, the sequences corresponding to the reference signal transmitted for the first time and the reference signal transmitted for the second time may be different, but the reference signals transmitted for the two times are both associated with the same data signal or channel and used as a reference for channel estimation to demodulate the data signal, and then the reference signals transmitted for the two times may be considered as the same reference signal.

For example, for the unlicensed transmission shown in fig. 2, the sequence corresponding to the reference signal sent for the first time is sequence 1, and the sequence corresponding to the reference signal sent for the second time is sequence 2, and without loss of generality, the reference signal sent for the kth time corresponds to sequence K, where K is greater than or equal to 1 and less than or equal to K. In this application, one case is to consider the reference signal to be the same when the sequences 1,2, …, k, are identical. The other situation is that: when the sequence 1, the sequence 2, …, and the sequence K correspond to each other according to a preset relationship (for example, using the time index and the ID of the terminal device as input parameters), the sequence 1, the sequence 2, …, and the sequence K are the same unlicensed transmission, that is, the reference signals are considered to be the same in the K transmission processes.

As an example, for the unlicensed transmission shown in fig. 2, the data signal transmitted for the first time corresponds to redundancy version 1 of the first transport block, the data signal transmitted for the second time corresponds to redundancy version 2 of the first transport block, and without loss of generality, the data signal transmitted for the kth time corresponds to redundancy version K of the first transport block, 1< ═ K, and since these data signals correspond to the same transport block, these data signals can be considered to be the same.

As can be seen from fig. 2, the reference signal and the data signal may be transmitted in the same time unit (e.g., a time domain symbol) or in different time units.

As an example, FIG. 2 is a usage scenario of the present application, an unlicensed transmission scenario. In the scenario shown in fig. 2, the reference signal and the corresponding data signal are transmitted in the same time unit (slot or mini-slot). Wherein the reference signal is available as a signal reference for channel estimation to demodulate the modulation symbols of the associated data signal/data channel. Meanwhile, the reference signal is also used for identifying the terminal equipment which sends the associated data signal.

When the network device receives signals in an unauthorized scenario, it first determines which terminal device is transmitting data by detecting a corresponding sequence on the RE of the reference signal. Once the network device detects the reference signal, the network device uses the reference signal to perform channel estimation, and demodulates the corresponding data signal according to the channel estimation result.

Here, the transmitting end transmits a reference signal and a data signal in each transmitted time unit (e.g., slot or mini-slot). Without loss of generality, a reference signal is said to be "associated" or "corresponding" to the data signal if it is used as a reference for channel estimation for demodulation of the data signal, and optionally if it is also used to identify the sender ID that sent the data signal.

To ensure the reliability of the transmission, the reference signal and the data signal are transmitted repeatedly K times, as shown in fig. 2, where each transmission corresponds to one mini-slot or time-slot. The reference signal and the data signal may be identical between the K repeated transmissions; alternatively, the reference signal may vary among a plurality of reference signal sequences according to a preset rule; or the transmitted data signals may be different but correspond to the same Transport Block (TB) or Code Block (CB) or Code Block Group (CBG).

As a typical design, the reference signals and their associated data signals of fig. 2 are multiplexed in a predetermined pattern in the time-frequency domain, as shown in the example of fig. 2. Without loss of generality, the present application may also be applied to the case where other multiplexing modes are used for the reference signal and its associated data signal, such as time division multiplexing and frequency division multiplexing.

The above embodiments are merely examples, and the present application does not limit the specific transmission method of the reference signal and the data signal.

Fig. 3 is a schematic diagram of a method for transmitting a signal according to the present application. The method 300 includes:

s301, a sending end sends a reference signal to a receiving end, and the transmitting power of the reference signal is P₁。

S302, the sending end sends a data signal to the receiving end, and the transmitting power of the data signal is P₂。

S303, the sending end sends the reference signal to the receiving end again, and the retransmission power of the reference signal is P₃，P₃Greater than P₁And P is₃And P₁The absolute value of the difference of (a) is Δ 1.

S304, the sending end sends the data signal to the receiving end again, and the retransmission power of the data signal is P₄，P₄Greater than or equal to P₂，P₄And P₂The absolute value of the difference of (a) is Δ 2, and Δ 2 is smaller than Δ 1.

In this application, the sending end may be, for example, a terminal device, and the receiving end may be, for example, a network device.

It should be noted that the term "power" in this application refers to the amount of energy transmitted in the same resource unit, and is not limited to the amount of energy of signals transmitted in the same time unit.

For example, the transmission power may be energy transmitted in a unit time, and when the reference signal and the associated data signal are multiplexed only in a time division multiplexing manner, the transmission power described herein is the energy of the signal transmitted in the unit time.

As another example, the term "power" in this application encompasses Energy Per Resource Element (EPRE), i.e., the energy of the signal transmitted on each resource element. For example, when the reference signal and the associated data signal are transmitted by using a cyclic prefix orthogonal frequency division multiplexing (CP-OFDM) scheme and are multiplexed on the time-frequency domain resources as shown in fig. 2, the term "power" in the present application means the transmission energy on each Resource Element (RE). Correspondingly, all power offsets described herein refer to energy offset values on the same resource unit.

It is noted that Δ 2 in this application may be zero, i.e., the power of the reference signal ramps up over multiple transmissions while the corresponding data signal power remains unchanged.

The reference signal may be, for example, a demodulation reference signal (DMRS), a Dedicated Reference Signal (DRS), or a channel Sounding Reference Signal (SRS), or may be another type of reference signal, and the specific form of the reference signal is not limited in the present application.

The data signal refers to a signal other than the reference signal, and the data signal refers to a signal corresponding to a physical channel for carrying a transport block, for example, a signal transmitted by a Physical Uplink Shared Channel (PUSCH) or a signal transmitted by a Physical Uplink Control Channel (PUCCH), without loss of generality.

The reference signal in S301 may be a reference signal transmitted for the first time, or may be a reference signal not transmitted for the first time; the data signal in S203 may be the data signal transmitted for the first time, or may be a data signal not transmitted for the first time. S301 may be executed before S302 or after S302.

The reference signal in S303 is a reference signal transmitted any one time after the reference signal is transmitted in S301, and typically, is a reference signal transmitted next time after the reference signal is transmitted in S301. For example, the reference signal in S301 is a reference signal transmitted for the first time, and the reference signal in S303 may be a reference signal transmitted for the second time, may be a reference signal transmitted for the third time, or may be a reference signal transmitted for a certain time after the reference signal is transmitted for the third time.

The data signal in S304 is a data signal transmitted at any time after the data signal is transmitted in S302, for example, the data signal in S301 is a data signal transmitted at the first time, and the data signal in S304 may be a data signal transmitted at the second time, a data signal transmitted at the third time, or a data signal transmitted at any time after the data signal is transmitted at the third time.

S303 may be performed before S304 or after S304.

Typically, the reference signal sent by S301 and the data signal sent by S302 belong to the same unlicensed transmission, the reference signal sent by S301 and the data signal sent by S302 are correlated, and the reference signal sent by S301 is used as a reference signal for demodulating the data signal, and is used for performing channel estimation, thereby demodulating the data signal. Meanwhile, in the unlicensed transmission, the reference signal is also used to identify the terminal device that sent the associated data signal. For example, different reference signal sequences correspond to different terminal device IDs, and the reference signal sequences are generated using the terminal device IDs as parameters.

Typically, the reference signal transmitted in S303 and the data signal transmitted in S304 belong to the same unlicensed transmission, the reference signal transmitted in S303 and the data signal transmitted in S304 are associated, and the reference signal transmitted in S303 is used as a reference signal for demodulating the data signal for channel estimation, so as to demodulate the data signal transmitted in S304. Meanwhile, in the unlicensed transmission, the reference signal is also used to identify the terminal device that sent the associated data signal. For example, different reference signal sequences correspond to different terminal device IDs, and the reference signal sequences are generated using the terminal device IDs as parameters.

In the method 300, a scheme for power ramping of the reference signal and the data signal during K repeated transmissions of the unlicensed transmission is provided. The step length used for power ramp of the reference signal (i.e. the difference between the powers of the reference signal sent in two adjacent times) and the step length used for power ramp of the data signal can be selected from a value set, and the step lengths used for transmitting the reference signal and the data signal can be configured by the network device or can be determined by the terminal device according to preset information stored in the terminal device.

For example, the step size used for transmitting the reference signal and the step size used for transmitting the data signal can be determined from the set {0,1,2,3,4,5}, and the units of the values in the set are decibels (dB).

For another example, the step size used for transmitting the reference signal may be determined from the set {0,1,2,3,4,5}, and the step size used for transmitting the data signal may be determined from the set {0,1,2,3}, where the units of the values in the set are all dB.

As another example, the step size used for transmitting the reference signal is Δ 1, Δ 1 may be determined from a set {0,1,2,3,4,5}, where values in the set are all in dB, and the step size used for transmitting the data signal is α Δ 1, where α is a positive number less than 1.

Because the reference signals between different terminal devices are usually orthogonal signals or low correlation sequences, in the process of repeatedly sending the reference signals, two terminal devices using the same time-frequency resource (namely under the condition of resource collision), the mutual interference caused by increasing the transmission power of the reference signals is small; the data signal is generally subjected to interference randomization by using a scrambling code, and is a non-orthogonal signal, when two user equipments interfere with each other due to resource collision, increasing power in a repetition process generally causes the interference to be mutually increased, and the signal-to-interference-and-noise ratio of the data signal sent by each user equipment at a receiving end cannot be increased. Therefore, according to the method 300 for transmitting a signal provided by the present application, using a smaller power ramp step for a data signal can reduce interference to other devices caused by an excessive transmission power of the data signal, for example, interference to other enhanced mobile broadband (eMBB) users or increase uplink interference to a neighboring cell. Meanwhile, the success probability of detecting the reference signal of the terminal equipment by the receiving end can be improved by increasing the transmitting power of the reference signal, so that the receiving end can identify the data currently transmitted by the user equipment as soon as possible, and the terminal equipment can send the data on the allocated uplink resources in a mode of allocating uplink grant (UL grant) even if the receiving end cannot demodulate and correctly decode the data, thereby reducing the time delay of correctly receiving the data of the terminal equipment.

Optionally, before the sending end sends the data signal to the receiving end again, the method 300 further includes:

s305, the transmitting end determines that the transmitting power which is not received by the receiving end is P₁The reference signal of (1).

The terminal device may start to increase the transmission power of the reference signal after determining that the network device does not receive the reference signal, for example, the terminal device may determine that the network device does not receive the reference signal after sending the reference signal three times, or may determine that the network device does not receive the reference signal according to feedback information that is not received by the network device, where the feedback information is used for feeding back that the network device receives the reference signal. The method for determining that the network device does not receive the reference signal by the terminal device is not limited in the present application.

According to the method of S305, a certain delay may be required for the terminal device to detect the reference signal, for example, in the case of cell edge or poor coverage, the base station needs to accumulate a certain number of times of reference signal transmission energy for joint detection, so as to be able to detect the transmission of the reference signal. In this case, the terminal does not need to ramp up the power of the reference signal upon the previous M-times repeated transmission, but detects the first indication information at a preset time and starts to ramp up the power of the reference signal if the first indication information is not detected.

Optionally, the sending end determines that the receiving end does not receive the transmission power as P₁The reference signal of (2), comprising:

s306, the transmitting end receives first indication information from the receiving end, where the first indication information is used to indicate that the receiving end does not receive the reference signal.

S307, the sending end determines that the transmitting power which is not received by the receiving end is P according to the first indication information₁The reference signal of (1).

If the network device does not receive the reference signal within the preset time period, the network device may send first indication information to the terminal device, indicating that the network device does not receive the reference signal. Here, the receiving of the reference signal means that the receiving end detects whether the reference signal exists, for example, if the power value of the signal received by the network device is smaller than the power threshold, the network device cannot determine whether there is a terminal that has transmitted the reference signal and the corresponding data signal on the corresponding time-frequency resource. Further, the receiving end may also detect a reference signal sequence corresponding to the reference signal, so as to further determine a terminal device Identifier (ID) or other corresponding ID information for sending the reference signal.

When the network device detects the reference signal, it can be determined that the terminal device has sent the relevant reference signal and the data signal associated with the relevant reference signal on the time frequency resource. The network device may send first indication information, and inform the terminal device that the network device has not detected the corresponding reference signal through the first indication information.

If the terminal device sends the transmission power P₁After receiving the first indication information, the terminal device may determine that the network device does not receive the transmission power P according to the first indication information₁The reference signal of (1). Optionally, as a reference signal power ramp mechanism, the terminal device needs to raise the transmission power of the reference signal at this time to increase the success rate of detecting the reference signal by the network device.

The network device may also send the first indication information in case of unsuccessfully decoded reference signals, which are also considered as not received reference signals.

Any information that may indicate that the network device does not receive the reference signal may be referred to as first indication information. The first indication information may here be a displayed indication, i.e. the first indication is represented using a dedicated signal or signalling or a field already present in the signalling. The first indication may also be an implicit indication, for example, an example is that the network device and the terminal device agree, and if the network device detects/receives the reference signal, a specific signal is sent on a preset resource; and if no reference signal is detected, the network does not transmit the specific signal. Here, if the terminal device does not detect a specific signal transmitted by the network device on a certain preset resource, it may be considered that the first indication information is received. The first indication information may be dedicated indication information, that is, a field carrying the first indication information is dedicated to indicate that the network device does not receive the reference signal; the first indication information may also multiplex fields carrying other information, so that signaling overhead may be reduced. The specific form of the first indication information is not limited in the present application.

Without loss of generality, the first indication information may also be mixed coded with other signals, e.g. mixed joint coding with feedback information (ACK/NACK) whether the data signal associated with the reference signal was received successfully or not.

Fig. 4 is a schematic diagram illustrating another method for transmitting signals provided by the present application.

As shown in fig. 4, the height of the square representing the signal represents the magnitude of the transmission power of the signal, i.e., the higher the height of the square representing the signal, the greater the transmission power of the signal; the lower the height of the square representing the signal, the less the transmitted power of the signal. The power climbing is not adopted when the terminal equipment sends the reference signal for the first time, and the terminal equipment receives the first indication information after sending the reference signal for the third time, so that the terminal equipment can increase the transmission power when sending the reference signal for the fourth time, and the success rate of the network equipment for receiving the reference signal is improved.

As can be seen from the above, in this embodiment, the terminal device determines whether the network device receives the reference signal according to whether the first indication information is received, so as to more accurately determine whether the transmission power of the reference signal needs to be increased.

As another example, the term "power" in this application encompasses Energy Per Resource Element (EPRE), i.e., the energy of a signal transmitted on each resource element. For example, when the reference signal and the associated data signal are transmitted in a CP-OFDM manner and multiplexed on time-frequency domain resources as shown in fig. 2, the term "power" in this application means transmission energy on each Resource Element (RE). Correspondingly, all power offsets described herein refer to energy offset values on the same resource unit.

Optionally, the reference signal in S301 is used for the demodulated data signal in S302, and the method 300 further includes:

s308, the sending end determines that the receiving end receives the transmitting power P₃And the transmitting end determines that the transmitting power is P when the receiving end does not receive the transmitting power₄The data signal of (1).

Here, the determination that the data signal is not received by the receiving end by the transmitting end means that the receiving end fails to correctly decode a transport block carried by the data signal, that is, a Cyclic Redundancy Check (CRC) check of the transport block fails.

Herein said P₃The transmitting end transmits the reference signal according to the transmitting power P of the last time₁According to a preset power climbing step (powerRampingStep), at P₁Increasing the power value of the climbing step length on the basis of the power to obtain the transmitting power P₃(ii) a Or, the terminal calculates the initial transmitting power P according to the measurement of the downlink Pathloss₀And calculating the TRANSMISSION power P according to the number of PREAMBLE TRANSMISSION times PREAMBLE recorded on the user equipment PREAMBLE₃＝P₀+(PREAMBLE_TRANSMISSION_COUNTER-1)*powerRampingStep。

S309, the transmitting end sends the transmitting power P to the receiving end again₃The reference signal of (1).

In this embodiment, the terminal device may not increase the transmission power of the reference signal after determining that the network device receives the reference signal, for example, the terminal device may determine that the terminal device receives the reference signal after receiving feedback information sent by the network device for feeding back a reference signal successfully received. Thus, the power consumption of the terminal device can be reduced.

Optionally, the sending end determines that the receiving end has received the transmission power P₃The reference signal of (2), comprising:

s310, the sending end receives second indication information from the receiving end, where the second indication information is used to indicate that the receiving end receives the reference signal and does not receive the data signal.

Here, that the receiving end does not receive the data signal means that the receiving end fails to correctly decode the transport block carried by the data signal, that is, the transport block CRC check fails. This is not particularly described below, but can be understood as a case where no data signal is received.

S311, the sending end determines the receiving transmitting power of the receiving end to be P according to the second indication information₃And the receiving end does not receive the reference signal with the transmitting power P₄The data signal of (1).

If the network device receives the reference signal and does not receive the data signal, the network device may send second indication information to the terminal device. For example, after the network device receives the reference signal, but performs channel estimation according to the reference signal, it is unable to correctly demodulate and decode the transmission block carried by the data signal associated with the reference signal. At this time, the network device needs to transmit the second indication information. If the terminal device receives the second indication information after sending the reference signal with the transmission power P3, the terminal device may determine, according to the second indication information, that the network device detected the reference signal with the transmission power P3 and did not successfully decode the information carried in the data signal with the transmission power P4.

The network device may also send the second indication information in case of unsuccessful decoding of the data signal, which again is considered as non-received.

Any information that can indicate that the network device receives the reference signal and does not receive the data signal can be referred to as second indication information, and the second indication information can be dedicated indication information, that is, a field carrying the second indication information is dedicated to indicate that the network device receives the reference signal and does not receive the data signal; the second indication information may also multiplex fields carrying other information, so that signaling overhead may be reduced. The specific form of the second indication information is not limited in the present application.

The second indication information may here be a displayed indication, i.e. the second indication is represented using a dedicated signal or signalling or a field already present in the signalling. The first indication may also be an implicit indication, for example, the network device and the terminal device agree that, if the network device detects/receives the reference signal and correctly decodes the corresponding data signal, the network device sends a specific signal on a preset resource; and if the reference signal is detected but the corresponding data signal is not correctly decoded, the network device does not transmit the specific signal. Here, if the terminal device does not detect a specific signal transmitted by the base station on a certain preset resource, it may be considered that the second indication information is received.

Without loss of generality, the second indication information may also be mixed encoded with other signals, e.g. mixed jointly encoded with the first indication information.

Fig. 5 is a schematic diagram illustrating another method for transmitting signals provided by the present application.

As shown in fig. 5, the height of the square representing the signal corresponds to the magnitude of the transmission power of the signal, i.e., the higher the height of the square representing the signal, the greater the transmission power of the signal; the lower the height of the square representing the signal, the less the transmitted power of the signal. The power ramp is not adopted when the terminal equipment sends the reference signal for the first three times, and the terminal equipment receives the second indication information after sending the reference signal for the third time, so that the terminal equipment can stop the power ramp of the reference signal when sending the reference signal for the fourth time, and the energy consumption of the terminal equipment is reduced.

As can be seen from the above, in this embodiment, the terminal device determines whether the network device receives the reference signal according to whether the second indication information is received, so as to more accurately determine whether to stop increasing the transmission power of the reference signal.

Optionally, the method 300 further comprises:

s312, the sending end sends the message according to M and P_nDetermining P_n+1Where M is the threshold of the number of transmissions, P_nThe transmission power for the nth transmission of the reference signal, P_n+1For the transmission power of the n +1 th transmission of the reference signal, M and n are positive integers, wherein,

when n is less than or equal to M, P_nLess than P_n+1Either the first or the second substrate is, alternatively,

when n is greater than or equal to M, P_nIs equal to P_n+1。

Fig. 6 is a schematic diagram illustrating another method for transmitting signals provided by the present application.

As shown in fig. 6, the height of the square representing the signal corresponds to the transmission power of the signal, i.e., the higher the height of the square representing the signal, the greater the transmission power of the signal; the lower the height of the square representing the signal, the less the transmitted power of the signal. M is set to 3.

The terminal device transmits the reference signal in a power climbing mode when transmitting the reference signal for the first time, because the transmission frequency exceeds the threshold of the transmission frequency when transmitting the reference signal for the fourth time, the terminal device does not increase the transmission power of the reference signal any more, namely, the transmission power of the reference signal for the fourth time is the same as that of the reference signal for the third time, and the transmission power of the reference signal for each subsequent time is not increased any more, so that the situation that the terminal device increases the transmission power of the reference signal meaninglessly under some special conditions can be avoided, for example, the terminal device fails to detect the second indication information, or the network device cannot receive the reference signal for a long time due to poor channel quality.

The M may be a parameter configured by the network device, or may be a parameter defined by the communication protocol.

Optionally, the method 300 further comprises:

s313, the transmitting end transmits power information to the receiving end, the power information indicating a power difference between the reference signal and the data signal.

If the modulation mode of the reference signal and the data signal is Quadrature Phase Shift Keying (QPSK), the network device can demodulate the signal only by detecting the phase, and therefore the terminal device does not need to transmit power information.

Alternatively, the offset (PO) value of the reference signal and the corresponding data signal power may also be indicated by a sequence of the reference signal. The terminal device determines the corresponding power offset value PO through the detection of the reference signal.

If the modulation mode of the reference signal and the data signal is a non-QPSK modulation mode, the terminal device may send power information to the network device, so as to improve the decoding success rate of the network device.

For example, the terminal device may indicate that the current reference signal is the reference signal transmitted several times through different reference signal sequences, the network device determines that the currently received reference signal is the reference signal transmitted several times according to the reference signal sequences, and since the power ramp step size of the reference signal and the corresponding data signal is known, the power difference between the reference signal and the data signal may be calculated, where the reference signal sequence is power information.

For another example, the terminal device may indicate a specific power difference through different reference signal sequences, where sequence 1 indicates that the power difference between the reference signal and the data signal is 2dB, and sequence 2 indicates that the power difference between the reference signal and the data signal is 4 dB.

For another example, the terminal device may transmit the power information indicating the power difference between the reference signal and the data signal through a Physical Uplink Control Channel (PUCCH).

The above embodiments are merely examples, and any method for transmitting power information by a terminal device falls within the scope of the present application.

Examples of methods for transmitting signals provided by the present application are described above in detail. It is understood that the terminal device and the network device include corresponding hardware structures and/or software modules for performing the respective functions in order to implement the functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.

The present application may perform the division of the functional units for the terminal device and the network device according to the above method examples, for example, each functional unit may be divided corresponding to each function, or two or more functions may be integrated into one processing unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit. It should be noted that the division of the units in the present application is schematic, and is only one division of logic functions, and there may be another division manner in actual implementation.

Fig. 7 shows a schematic diagram of a possible structure of the terminal device according to the above-described embodiment, in the case of an integrated unit. The terminal device 700 includes: a processing unit 702 and a communication unit 703. Processing unit 702 is configured to control and manage actions of terminal device 700, e.g., processing unit 702 is configured to enable terminal device 700 to perform the various steps of fig. 3 and/or other processes for the techniques described herein. The communication unit 703 is used to support communication between the terminal device 700 and other terminal entities, for example, with network devices. The terminal device 700 may further include a storage unit 701 for storing program codes and data of the terminal device 700.

For example, the processing unit 702 is configured to control the communication unit 703 to perform:

sending a reference signal to a receiving end, wherein the transmission power of the reference signal is P₁；

Sending a data signal to a receiving end, wherein the transmitting power of the data signal is P₂；

Sending the reference signal to the receiving end again, wherein the retransmission power of the reference signal is P₃，P₃Greater than P₁And P is₃And P₁The absolute value of the difference of (a) is Δ 1;

sending the data signal to the receiving end again, wherein the retransmission power of the data signal is P₄，P₄Greater than or equal to P₂，P₄And P₂The absolute value of the difference of (a) is Δ 2, and Δ 2 is smaller than Δ 1.

The processing unit 702 may be a processor or a controller, such as a Central Processing Unit (CPU), a general purpose processor, a Digital Signal Processor (DSP), an application-specific integrated circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication unit 703 may be a transceiver, a transceiver circuit, or the like. The memory unit 701 may be a memory.

When the processing unit 702 is a processor, the communication unit 703 is a transceiver, and the storage unit 701 is a memory, the terminal device according to the present application may be the terminal device shown in fig. 8.

Referring to fig. 8, the terminal apparatus 800 includes: a processor 802, a transceiver 803, a memory 801. The transceiver 803, the processor 802, and the memory 801 may communicate with each other via internal communication paths to communicate control and/or data signals.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

According to the terminal device 700 and the terminal device 800 provided by the application, the interference to other devices caused by the overlarge transmitting power of the data signal can be reduced by adopting a smaller power ramp step length for the data signal, and meanwhile, the transmitting power of the reference signal is increased, and the transmission reliability of the reference signal and the data signal can be enhanced by repeatedly transmitting the reference signal and the data signal.

It should be understood that the above-described transceiver may include a transmitter and a receiver. The transceiver may further include an antenna, and the number of antennas may be one or more. The memory may be a separate device or may be integrated into the processor. The above-mentioned devices or parts of the devices may be implemented by being integrated into a chip, such as a baseband chip.

The network devices or terminal devices in the apparatus and method embodiments completely correspond to each other, and corresponding steps are performed by corresponding modules, for example, a sending module method or a transmitter performs the steps sent in the method embodiment, a receiving module or a receiver performs the steps received in the method embodiment, and other steps except sending and receiving may be performed by a processing module or a processor. The functions of the specific modules can be referred to corresponding method embodiments, and are not described in detail.

In the embodiments of the present application, the sequence numbers of the processes do not mean the execution sequence, and the execution sequence of the processes should be determined by the functions and the inherent logic of the processes, and should not limit the implementation processes of the present application.

In addition, the term "and/or" herein is only one kind of association relationship describing an associated object, and means that there may be three kinds of relationships, for example, a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.

The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules that may be stored in Random Access Memory (RAM), flash memory, Read Only Memory (ROM), Erasable Programmable ROM (EPROM), Electrically Erasable Programmable ROM (EEPROM), registers, a hard disk, a removable disk, a compact disc read only memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. In addition, the ASIC may reside in a terminal device. Of course, the processor and the storage medium may reside as discrete components in the terminal device and the network device.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the procedures or functions described in accordance with the present application are generated, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in or transmitted over a computer-readable storage medium. The computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center by wire (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)), or wirelessly (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., Digital Versatile Disk (DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), etc.

The above-mentioned embodiments, objects, technical solutions and advantages of the present application are further described in detail, it should be understood that the above-mentioned embodiments are only examples of the present application, and are not intended to limit the scope of the present application, and any modifications, equivalent substitutions, improvements and the like made on the basis of the technical solutions of the present application should be included in the scope of the present application.

Claims

1. A method for sending a signal, comprising:

The transmitting end sends a reference signal to the receiving end, the transmit power of the reference signal is P ₁ , and the reference signal is used to identify the transmitting end;

the transmitting end sends a data signal to the receiving end, and the transmit power of the data signal is P ₂ ;

The transmitting end sends the reference signal to the receiving end again, the retransmission power of the reference signal is P ₃ , the P ₃ is greater than the P ₁ , and the difference between the P ₃ and the P ₁ The absolute value of the value is Δ1;

The transmitting end sends the data signal to the receiving end again, and the retransmission power of the data signal is P ₄ , the P ₄ is greater than or equal to the P ₂ , and the difference between the P ₄ and the P ₂ The absolute value of the difference is Δ2, which is smaller than the Δ1.

2. The method according to claim 1, wherein before the transmitting end sends a data signal to the receiving end again, the method further comprises:

_The transmitting end determines that the receiving end has not received the reference signal whose transmit power is P1.

3. The method according to claim 2, wherein determining, by the transmitting end, that the receiving end has not received the reference signal with a transmit power of P ₁ , comprising:

The transmitting end receives first indication information from the receiving end, where the first indication information is used to indicate that the receiving end has not received the reference signal;

The transmitting end determines, according to the _first indication information, that the receiving end has not received the reference signal whose transmit power is P1.

4. The method according to any one of claims 1 to 3, wherein the reference signal is a demodulation reference signal of the data signal.

5. The method according to claim 4, wherein the method further comprises:

The transmitting end determines that the receiving end has received the reference signal with a transmit power of P ₃ , and the transmitting end determines that the receiving end has not received the data signal with a transmit power of P ₄ ;

The transmitting end sends the reference signal with a transmit power of P ₃ to the receiving end again.

6. The method according to claim 5, wherein determining, by the transmitting end, that the receiving end has received the reference signal with a transmit power of P ₃ , comprising:

The transmitting end receives second indication information from the receiving end, where the second indication information is used to indicate that the receiving end has received the reference signal and has not received the data signal;

The transmitting end determines according to the second indication information that the receiving end has received the reference signal with a transmit power of P ₃ , and the receive end has not received the data signal with a transmit power of P ₄ .

7. The method according to any one of claims 1 to 3, wherein the method further comprises:

The transmitting end determines P _n+1 according to M and P _n , where M is a threshold for the number of times of transmission, P _n is the transmit power of the nth transmission of the reference signal, and P _n+1 is the reference The transmit power of the n+1th transmission of the signal, the M and the n are positive integers, where,

When the n is less than or equal to the M, the P _n is less than the P _n+1 , or,

When the n is greater than or equal to the M, the P _n is equal to the P _n+1 .

8. The method according to any one of claims 1 to 3, wherein the method further comprises:

The transmitting end sends power information to the receiving end, where the power information is used to indicate a power difference between the reference signal and the data signal.

9. An apparatus for sending a signal, comprising a processing unit and a communication unit, wherein the processing unit is configured to control the communication unit to perform:

sending a reference signal to the receiving end, where the transmit power of the reference signal is P ₁ , and the reference signal is used to identify the sending end;

sending a data signal to the receiving end, where the transmit power of the data signal is P ₂ ;

Sending the reference signal to the receiving end again, the retransmission power of the reference signal is P ₃ , the P ₃ is greater than the P ₁ , and the absolute value of the difference between the P ₃ and the P ₁ is Δ1;

Send the data signal to the receiving end again, the retransmission power of the data signal is P ₄ , the P ₄ is greater than or equal to the P ₂ , and the absolute difference between the P ₄ and the P ₂ The value is Δ2, which is smaller than the Δ1.

10. The apparatus according to claim 9, wherein the processing unit is further configured to:

It is determined that the receiving end has not received the reference signal whose transmit power is _P1 .

11. The apparatus of claim 10, wherein

The communication unit is further configured to: receive first indication information from the receiving end, where the first indication information is used to indicate that the receiving end has not received the reference signal;

The processing unit is specifically configured to: determine, according to the _first indication information, that the receiving end has not received the reference signal whose transmit power is P1.

12 . The apparatus according to claim 9 , wherein the reference signal is a demodulation reference signal of the data signal. 13 .

13. The apparatus of claim 12, wherein

The processing unit is further configured to: determine that the receiving end has received the reference signal with a transmit power of P ₃ , and the receiving end has not received the data signal with a transmit power of P ₄ ;

The communication unit is further configured to send the reference signal with a transmit power of P ₃ to the receiving end again.

14. The apparatus of claim 13, wherein

The communication unit is further configured to: receive second indication information from the receiving end, where the second indication information is used to indicate that the receiving end has received the reference signal and has not received the data signal;

The processing unit is further configured to: determine, according to the second indication information, that the receiving end has received the reference signal with a transmit power of P ₃ , and the receive end has not received the data with a transmit power of P ₄ Signal.

15. The apparatus according to any one of claims 9 to 11, wherein the processing unit is further configured to:

Determine P _n+1 according to M and P _n , where M is the threshold of the number of transmissions, P _n is the transmit power of the nth transmission of the reference signal, and P _n+1 is the n+th transmission of the reference signal The transmit power of one transmission, the M and the n are positive integers, where,

When the n is greater than or equal to the M, the P _n is equal to the P _n+1 .

16. The apparatus according to any one of claims 9 to 11, wherein the communication unit is further configured to:

Sending power information to the receiving end, where the power information is used to indicate a power difference between the reference signal and the data signal.