WO2017107366A1

WO2017107366A1 - Signal transmitting and receiving method and apparatus

Info

Publication number: WO2017107366A1
Application number: PCT/CN2016/081912
Authority: WO
Inventors: 焦淑蓉; 花梦
Original assignee: 华为技术有限公司
Priority date: 2015-12-25
Filing date: 2016-05-12
Publication date: 2017-06-29
Also published as: WO2017107211A1

Abstract

In the present application, a signal transmitting and receiving method is provided, comprising: a transmission terminal transmits a pilot signal of a first pilot interval at an mth TTI, and transmits the pilot signal of a second pilot interval in the case where transmission resources to be used for transmitting signals at an nth TTI satisfy a preset condition, wherein the second pilot interval is greater than the first pilot interval; and correspondingly, a receiving terminal receives a first pilot signal using the first pilot interval at the mth TTI, and receiving a second pilot signal using the second pilot interval in the case where the transmission resources to be used for receiving signals at the nth TTI satisfy the preset condition. Therefore, it is possible to reduce the time-frequency resource occupied by the pilot signal and to save resources, thereby there will be more physical resources assigned to the data, improving data rates and system throughput.

Description

Signal transmitting and receiving method and device

Technical field

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

Background technique

The existing wireless communication technology is inseparable from the frequency resources. However, with the wide application of wireless communication, the time-frequency resources that can be used are less and less. Therefore, how to improve the utilization rate of time-frequency resources has become an urgent problem to be solved. .

Summary of the invention

The present application provides a signal transmitting and receiving method and apparatus, and aims to solve the problem of how to improve the utilization of time-frequency resources.

In order to achieve the above object, the present application provides the following technical solutions:

A first aspect of the present application provides a signal transmitting method, including the steps of: transmitting, at a mth transmission time interval TTI, a first signal, where the first signal includes a first data signal and a first pilot signal; Whether the first transmission resource to be used when the nth TTI transmits a signal satisfies a first preset condition; and if the first transmission resource satisfies the first preset condition, using the first tTI in the nth TTI Transmitting a second signal, where the second signal includes a second data signal and a second pilot signal, wherein a second pilot interval of the second pilot signal is greater than a first pilot signal A pilot interval, m, n are natural numbers, and n>m. In the signal transmitting method provided by the first aspect, when the transmission resource used by the signal to be transmitted satisfies the condition, the pilot interval of the pilot signal is increased in the transmitted signal, so that resources occupied by the pilot signal can be reduced. Thereby improving resource utilization.

A second aspect of the present application provides a communication device, including: a transmitter and a processor, wherein the transmitter is configured to transmit a first signal at an mth transmission time interval TTI, where the first signal includes a first data signal and a first pilot signal, the processor is configured to determine whether the first transmission resource to be used in the nth TTI meets a first preset condition, and the transmitter is further configured to meet the first preset condition in the first transmission resource Transmitting, by the first TTI, a second signal, where the second signal includes a second data signal and a second pilot signal, where The second pilot interval of the second pilot signal is greater than the first pilot interval of the first pilot signal, where m, n are both natural numbers and n>m. In the communication device provided by the second aspect, since the interval between time-frequency resources occupied by the pilot signals can be increased if the preset condition is satisfied, the utilization of the spectrum can be improved.

In an implementation manner of the first aspect and the second aspect, the method further includes: in the case that the first transmission resource does not meet the first preset condition, in the nth TTI The first transmission resource transmits a third signal, and the third signal includes the second data signal and the first pilot signal. If the condition is not satisfied, the first pilot signal is still used, so that the accuracy of receiving the signal at the receiving end can be ensured.

In another implementation manner of the first aspect and the second aspect, the specific manner of determining whether the first transmission resource used by the nth TTI to send the signal meets the first preset condition includes: determining, Whether the time interval between the nth TTI and the mth TTI is less than a preset first threshold; or determining whether a frequency band to be used when the nth TTI transmits a signal and a frequency band used when transmitting the first signal Or determining whether a frequency band to be used when the nth TTI transmits a signal is a subset of a frequency band used when transmitting the first signal; or determining a channel to be used when the nth TTI transmits a signal Whether the coherence time of the channel used when transmitting the first signal is greater than a preset second threshold; or determining a channel to be used when the nth TTI transmits a signal and a channel used when transmitting the first signal Whether the coherence time is greater than a time interval between two adjacent transmission of the data signal; or determining whether the mth TTI and the nth TTI are in a TTI binding state; or in the multiple input multiple output MIMO mode, determining Nth Whether the precoding information to be used when the TTI transmits the signal is the same as the precoding information used when transmitting the first signal, wherein the precoding information is at least one of a rank sum precoding matrix.

Further, in another implementation manner of the first aspect and the second aspect, determining whether the first transmission resource used by the nth TTI transmission signal meets the first preset condition further includes: determining Whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.

The purpose of the above judging process is to ensure that the receiving end can correctly perform channel estimation according to the pilot signal after increasing the pilot interval.

In another implementation of the first aspect and the second aspect, the transmitting, by the nth TTI, the second signal by using the first transmission resource includes: receiving the first signal In the case that the hybrid automatic repeat request acknowledges the HARQ ACK, the second signal is transmitted by using the first transmission resource in the nth TTI to ensure that the receiving end can correctly perform channel according to the pilot signal after increasing the pilot interval. estimate.

In another implementation manner of the first aspect and the second aspect, before the sending, by the nth TTI, the first transmission resource, the second signal, the method further includes: according to the mth TTI Time interval between the mth TTI and the nth TTI, and a one-to-one correspondence between the preset at least one time range and the at least one time-frequency resource, and the time between the mth TTI and the nth TTI The time-frequency resource corresponding to any one of the at least one time range and the time-frequency resource occupied by the second pilot signal is determined.

According to the foregoing method, the interval of the video resources occupied by the pilot signals can be determined according to the time interval of the two TTIs, that is, the shorter the interval between the two TTIs, the greater the interval of the time-frequency resources occupied by the pilot signals. , thereby further improving the utilization of frequency resources.

In another implementation manner of the first aspect and the second aspect, the method further includes: determining whether the second transmission resource to be used when the ith TTI sends a signal satisfies a second preset condition; If the second transmission resource satisfies the second preset condition, sending, by the second transmission resource, a fourth signal, where the fourth signal includes a third data signal and the second pilot a signal, or the fourth signal includes the third data signal and a third pilot signal, wherein a third pilot interval of the third pilot signal is greater than the first pilot interval, and i is a natural number And i>n; transmitting, when the second transmission resource does not meet the second preset condition, a fifth signal, where the fifth signal includes the third data signal and the first pilot signal . That is to say, in the TTI after the nth TTI, if the condition is still satisfied, the pilot signal for increasing the pilot interval in the nth TTI may be used, and other pilot signals for increasing the pilot interval may be used. To further save frequency resources.

Further, in another implementation manner of the first aspect and the second aspect, determining whether the second transmission resource to be used when the ith TTI sends a signal meets a second preset condition includes: determining Whether a time interval of the i-th TTI and the mth TTI or the nth TTI is less than a preset third threshold; or determining whether a pilot signal of a signal transmitted in the nth TTI is the first a pilot signal; or determining whether a frequency band to be used when the ith TTI transmits a signal is the same as a frequency band used when transmitting the first signal or a frequency band used when transmitting the signal at the nth TTI; or Whether the frequency band to be used when the ith TTI transmits a signal is a frequency band used when transmitting the first signal, or a subset of frequency bands used when the nth TTI transmits a signal; or determining a channel to be used when the ith TTI transmits a signal and transmitting the first Whether the channel used in the signal, or the coherence time of the channel to be used when the nth TTI transmits the signal, is greater than a preset fourth threshold; or determining the channel to be used when the ith TTI transmits the signal Whether the channel used in the first signal or the coherence time of the channel to be used when the nth TTI transmits a signal is greater than a time interval between two adjacent transmission data signals; or determining the ith TTI and the Whether the mth TTI or the nth TTI is in a TTI-bound state; or in the multiple-input multiple-output MIMO mode, determining precoding information to be used when the ith TTI transmits a signal and transmitting the first signal The precoding information employed, or whether the precoding information is to be used when transmitting the signal at the nth TTI, wherein the precoding information is at least one of a rank sum precoding matrix.

In another implementation manner of the first aspect and the second aspect, determining whether the second transmission resource to be used when the ith TTI sends a signal meets the second preset condition further includes: determining the ith Whether the TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows the pilot interval to be increased.

In another implementation of the first aspect and the second aspect, before the sending, by the ith TTI, the fourth transmission resource by using the second transmission resource, the method further includes: according to the nth TTI Time interval between the nth TTI and the i-th TTI, and a one-to-one correspondence between the preset at least one time range and the at least one time-frequency resource, and the time between the nth TTI and the i-th TTI The time-frequency resource corresponding to any one of the at least one time range that is determined by the interval is determined to be a time-frequency resource occupied when the fourth pilot signal is transmitted.

In another implementation manner of the first aspect and the second aspect, the method further includes: transmitting pilot indication information, where the pilot indication information is used to indicate that the first guide is used in the mth TTI a frequency interval, or the second pilot interval is used in the nth TTI, or the first pilot interval is used in the mth TTI and the second pilot interval is used in the nth TTI. In another implementation manner of the first aspect and the second aspect, the pilot indication information is sent to the receiving end by using physical layer control signaling. The pilot signal indication information is advantageous for increasing the accuracy of receiving signals at the receiving end.

In another implementation manner of the first aspect and the second aspect, before determining whether the first transmission resource to be used when the nth TTI transmits a signal meets the first preset condition, The method further includes: transmitting a pilot switching mode on request to the receiving end, and receiving a pilot switching mode on command sent by the receiving end in response to the pilot switching mode on request; or receiving a guide issued by the receiving end The frequency switching mode is turned on; or the pilot switching mode on command is sent to the receiving end.

In another implementation manner of the first aspect and the second aspect, the method further includes: the downlink pilot transmission adopts a periodic pattern, that is, the pilots of different intervals are sent according to a predetermined period, and The pilot information is sent or not transmitted in a predetermined period, and the predetermined period information is previously configured to the user through the high layer signaling; the uplink pilot indication is used to indicate the pilot pattern, that is, the downlink control information for scheduling the uplink data transmission (DCI: Downlink) The pilot information is indicated by bits in the Control Information, and the pilot position information may include the time of the pilot, the frequency interval of the pilot, the position of the pilot and the data, or the pilot.

The base station transmits pilots in a predetermined pilot interval in each TTI. The pilot intervals in different TTIs may be different. The pilot intervals of different TTIs are set in a predefined order, such as pilots of multiple consecutive TTIs. The interval is a cyclic sequence of the first pilot interval, the second pilot interval, the second pilot interval, the first pilot interval, the second pilot interval, the second pilot interval, and the first pilot interval: if the base station If the data of the four TTIs is sent to a user, the first pilot interval, the second pilot interval, the second pilot interval, and the first pilot interval are used in sequence; if the base station sends a message to a user continuously, 2 For the data of the TTI, the first pilot interval and the second pilot interval are sequentially used. There may be more than two pilot intervals, and the predefined order of pilot intervals may be more than the above examples. The predefined sequence of the pilot interval may be specified by the protocol, or may be sent by the base station by using the high layer signaling, or may be specified by the protocol in several predefined sequences, and then the base station selects one of the layers by using the high layer signaling. The user equipment needs to obtain the pilot interval information through the protocol or the high layer signaling sent by the base station, so that the pilot can be accurately extracted from the downlink signal sent to itself, the pilot is used for channel estimation, and the auxiliary data is received and demodulated.

When the uplink data of the user equipment is scheduled, the base station sends a pilot interval indication to the user, indicating the pilot interval of the pilot carried by the user equipment when transmitting the uplink data. In general, the behavior of the user equipment is controlled by the base station. If there are multiple choices of pilot intervals for the uplink pilot, the base station may indicate with clear information which information the user equipment uses; or similar to the previous embodiment, There are predetermined rules on the protocol to clarify how the pilot spacing is chosen. In general, the user equipment performs uplink signal transmission according to the protocol or the indication of the base station, including uplink data and uplink pilot.

A third aspect of the present application provides a signal receiving method, including the steps of: receiving, at a mth transmission time interval TTI, a first pilot signal using a preset first pilot interval, and according to the first pilot Receiving, by the signal, the first data signal; determining, at the nth TTI, whether the first transmission resource to be used when the signal is received meets a first preset condition; if the first transmission resource satisfies the first preset condition, Receiving, by using a preset second pilot interval, a second pilot signal on the first transmission resource, and receiving a second data signal according to the second pilot signal, where the second pilot interval is greater than The first pilot interval, m, n are all natural numbers, and n>m. The signal receiving method provided by the third aspect, when the transmission resource used by the received signal satisfies the condition, cooperates with the transmitting end to increase the pilot interval of the pilot signal, and uses the sparse pilot to receive the signal, thereby facilitating resource utilization. rate.

A fourth aspect of the present application provides another communication device comprising a receiver and a processor coupled to the receiver, the processor for using a preset first pilot interval at an mth transmission time interval TTI Receiving, by the receiver, a first pilot signal, and receiving, by the receiver, a first data signal according to the first pilot signal; the processor is further configured to: when determining the received signal at the nth TTI Whether the first transmission resource to be used satisfies a first preset condition, and if the first transmission resource satisfies the first preset condition, using a preset second pilot on the first transmission resource Receiving, by the receiver, a second pilot signal, and receiving, by the receiver, a second data signal according to the second pilot signal, wherein the second pilot interval is greater than the first pilot The frequency interval, m, n are all natural numbers, and n>m.

A fifth aspect of the present application provides another signal receiving method, including: receiving, at a mth transmission time interval TTI, a first pilot signal by using a preset first pilot interval, and according to the first pilot signal Receiving a first data signal; detecting, at the nth TTI, a second pilot interval from the received pilot indication information, the second pilot interval being greater than the first pilot interval; using at the nth TTI The second pilot interval receives the second pilot signal and receives the second data signal based on the second pilot signal.

A sixth aspect of the present application provides another communication device, including: a receiver and a processor coupled to the receiver, the processor configured to use a preset first pilot at an mth transmission time interval TTI Interval, receiving, by the receiver, a first pilot signal, and receiving, by the receiver, a first data signal according to the first pilot signal; the processor is further configured to pass the receiver at the nth TTI Detecting a second pilot interval in the received pilot indication information, the second guide The frequency interval is greater than the first pilot interval; and the second pilot interval is used at the nth TTI, the second signal is received by the receiver, and the receiving is received according to the second pilot signal The receiver receives the second data signal.

In an implementation manner of the fifth aspect and the sixth aspect, the method further includes: determining, when the nth TTI receives a signal, not using the pilot indication information Whether a transmission resource satisfies a first preset condition, and if the first transmission resource does not satisfy the first preset condition, using the first pilot interval receiving station on the first transmission resource The second pilot signal is configured to receive, by using the preset second pilot interval, on the first transmission resource, if the first transmission resource meets the first preset condition And a second pilot signal, and receiving the second data signal according to the second pilot signal.

In an implementation manner of the fifth aspect and the sixth aspect, the method further includes: in the case that the pilot indication information is not detected, according to the preset pilot in the nth TTI The second pilot signal is blindly received at intervals and the second data signal is received using the second pilot signal.

In another implementation manner of the foregoing third aspect, the fourth aspect, the fifth aspect, and the sixth aspect, the determining whether the first transmission resource to be used when the nth TTI receives the signal is satisfied The first preset condition includes: determining whether a time interval of the nth TTI and the mth TTI is less than a preset first threshold; or determining whether a frequency band to be used when the nth TTI receives a signal and a receiving station The frequency band used in the first signal is the same; or determining whether the frequency band to be used when the nth TTI receives the signal is a subset of the frequency band used when receiving the first signal; or determining that the nth Whether the channel to be used when the TTI receives the signal and the coherence time of the channel used when receiving the first signal are greater than a preset second threshold; or determining the channel and the receiving station to be used when the nth TTI receives the signal Whether the coherence time of the channel used in the first signal is greater than the time interval of the adjacent two received data signals; or determining whether the mth TTI and the nth TTI are in a TTI-bound state; MIMO mode Determining whether the precoding information to be used when the nth TTI receives a signal is the same as the precoding information used when receiving the first signal, where the precoding information is at least a rank and a precoding matrix. One.

Further, determining whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition further includes: determining whether the nth TTI is a preset type of TTI, The preset type of TTI is a TTI that allows the pilot interval to be increased.

In another implementation manner of the foregoing third aspect, the fourth aspect, the fifth aspect, and the sixth aspect, the preset information is used on the nth TTI and the first transmission resource. Receiving the second pilot signal by the pilot interval of the second pilot signal includes: in a case where the hybrid automatic repeat request response HARQ ACK of the first signal is received by the transmitting end of the first data signal, And transmitting, by the pilot interval of the preset second pilot signal, the second pilot signal on the nth TTI and the first transmission resource.

A seventh aspect of the present application provides a signal receiving method, including: blindly receiving a first pilot signal by using a preset pilot interval, and receiving first data according to the first pilot signal, in an mth TTI And at the nth TTI, the second pilot signal is blindly received by using the preset pilot interval, and the second data signal is received according to the second pilot signal, where the preset pilot interval is at least The first pilot interval and the second pilot interval are included, and the second pilot interval is greater than the first pilot interval.

An eighth aspect of the present application provides a communication device, including: a receiver and a processor coupled to the receiver, the processor configured to use a preset pilot interval at the mth TTI, respectively, by using Receiving, by the receiver, the first pilot signal, and receiving, by the receiver, the first data signal according to the first pilot signal; and in the nth TTI, using the preset pilot interval blindly, respectively Receiving, by the receiver, a second pilot signal, and receiving, by the receiver, a second data signal according to the second pilot signal, where the preset pilot interval includes at least a first pilot interval and a second a pilot interval, the second pilot interval being greater than the first pilot interval.

In an implementation manner of the seventh aspect and the eighth aspect, the blind receiving the first pilot signal by using the preset pilot interval, respectively, includes: using the preset pilot interval to the first The pilot signal performs a correlation operation to obtain an operation result; and the signal received by the pilot interval used to obtain the maximum operation result is determined to be the first pilot signal. The seventh aspect and the technical solution provided by the eighth aspect provide blind reception of the signal, thereby facilitating compatibility with the sparse or dense pilot signal transmitted by the receiving and transmitting end.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art description will be briefly described below, obviously, The drawings in the following description are only some of the embodiments of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative work.

1 is a schematic structural diagram of a transmitting end and a receiving end;

2 is a schematic diagram of a signal including a data signal and a pilot signal;

3 is a flowchart of a method for transmitting and receiving a signal according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a signal sending method according to an embodiment of the present invention; FIG.

FIG. 5 is a schematic diagram of a signal sending method according to an embodiment of the present invention; FIG.

FIG. 6 is a flowchart of still another method for transmitting and receiving signals according to an embodiment of the present invention;

FIG. 7 is a flowchart of still another method for transmitting and receiving signals according to an embodiment of the present invention;

FIG. 8 is a flowchart of a signal receiving method according to an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a communication device according to an embodiment of the present invention.

detailed description

As shown in FIG. 1 , in the process of transmitting signals, the transmitting end and the receiving end acquire a pilot pattern in addition to baseband operations such as blocking, encoding, interleaving, scrambling, etc., on the data to be transmitted ( The pilot pattern may be sent in advance by the network, and the data signal and the pilot signal are combined to generate a signal to be transmitted according to the pilot pattern, and the modulator of the transmitting end modulates the signal to be transmitted, and the transmitter at the transmitting end modulates the signal to be transmitted. Send a signal to transmit. After the receiver at the receiving end receives the signal, the demodulator at the receiving end demodulates the signal, and the processor at the receiving end separately receives the data signal and the pilot signal in the demodulated signal, and uses the received pilot signal to perform the signal. Channel estimation, the result of channel estimation is used to demodulate and decode the data signal.

As shown in FIG. 2, the data signal and the pilot signal included in the transmitted signal respectively occupy different resources, and the pattern formed by the resource position occupied by the pilot signal is called a pilot pattern, and the resource includes a time resource location and a frequency. Resource location and antenna port location, etc. The interval between resources occupied by pilot signals is called the pilot interval. The smaller the pilot interval, the better the tracking of the channel, and the larger the pilot interval, the more resources are saved.

The transmitting end shown in FIG. 1 may be a terminal device or a network side device. Specifically, the terminal device may include a mobile station (MS), a terminal, a terminal equipment, and the like. For convenience of description, in the present application, the above-mentioned devices are collectively referred to as terminal devices. The network side device may include a Node B (NodeB), An evolved NodeB (eNodeB), a base transceiver station (BTS), a radio network controller (RNC), a base station controller (BSC), and the like.

The above technical solution will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application.

FIG. 3 shows a specific process of transmitting a signal and receiving a signal at the receiving end shown in FIG. 1 , including the following steps:

S301: The transmitting end sends a first signal at the mth transmission time interval TTI. The first signal includes a first pilot signal and a first data signal, where the first pilot signal has a first pilot interval, and m is a natural number.

It should be noted that the Transmission Time Interval (TTI) described in this embodiment refers to a short delay TTI defined in a future communication protocol (for example, 5G), instead of 1 ms in the existing LTE protocol. 2ms TTI inside UMTS.

The first signal may be the first transmitted signal or the non-first transmitted signal.

S302: The receiving end receives the first pilot signal on the first transmission resource of the mth TTI by using a preset first pilot interval, and receives the first data signal according to the first pilot signal.

Specifically, after receiving the first pilot signal by using the first pilot interval, the receiving end performs operations such as channel estimation by using the received pilot signal, and then receives the first data signal according to the result of the channel estimation.

It should be noted that before the signal transmission, the receiving end and the transmitting end have already agreed on the used pilot signal and the pilot interval, and the receiving end follows the convention to receive the pilot signal in the first signal, and the specific manner of the agreement may be See prior art.

S303: The transmitting end negotiates with the receiving end to enter a pilot switching mode.

Specifically, if the transmitting end is the network side and the receiving end is the terminal device, the network side may send a pilot switching mode on command to the terminal device, and after receiving the pilot switching mode on command, the terminal device confirms that the pilot switching mode is turned on.

Specifically, if the sending end is the terminal device and the receiving end is the network side, the terminal device may send a pilot switching mode on request to the network side, and after receiving the pilot switching mode on request, the network side confirms to enter the pilot switching mode, and The pilot switching mode on command is sent to the terminal device; or the network side actively sends a pilot switching mode on command to the terminal device.

It should be noted that if the network side considers that it is not suitable to enter the pilot switching mode, the process ends, and the transmitting end and the receiving end perform data transmission according to the prior art.

The purpose of S303 is to ensure that the receiving end's detection strategy for the pilot signal follows the measures of increasing the pilot interval by the transmitting end to make timely adjustments to ensure the accuracy of the channel estimation.

S304: The transmitting end determines whether the first transmission resource to be used when the nth TTI transmits a signal satisfies the first preset condition. If yes, execute S305, if no, execute S306.

In this embodiment, the transmission resource refers to various resources and channel conditions used for transmitting the pilot signal and the data signal, for example, the frequency resource occupied by the transmission of the pilot signal and the data signal, the coherence time of the channel, and the like.

Specifically, in this embodiment, the determining process may be any of the following:

1. Determine whether the time interval between the nth TTI and the mth TTI is less than a preset first threshold.

2. Determine whether the frequency band to be used when transmitting the signal at the nth TTI is the same as the frequency band used when transmitting the first signal.

3. Determine whether the frequency band to be used when transmitting the signal at the nth TTI is a subset of the frequency band used when transmitting the first signal.

4. Determine whether the coherence time of the channel to be used when the nth TTI transmits a signal and the channel used when transmitting the first signal is greater than a preset second threshold.

5. Determine whether the coherence time of the channel to be used when the nth TTI transmits a signal and the channel used when transmitting the first signal is greater than the time interval between two adjacent transmission data signals.

6. Determine whether the mth TTI and the nth TTI are in a TTI binding state.

7. In the MIMO mode, determining whether the precoding information to be used when transmitting the signal in the nth TTI is the same as the precoding information used when transmitting the first signal, where the precoding information is At least one of the rank sum precoding matrices.

S305: The transmitting end sends the second signal by using the first transmission resource at the nth TTI, where the second signal includes the second pilot signal and the second data signal.

The second pilot signal has a second pilot interval, and the second pilot interval is greater than the first pilot interval.

For example, a case where the second pilot interval is greater than the first pilot interval is that the second pilot signal is completely different from the pattern of the first pilot signal. That is, the second pilot signal and the first pilot signal The time-frequency resources occupied are completely different.

For example, another case where the second pilot interval is greater than the first pilot interval is: the time-frequency resource occupied by the second pilot signal in the second signal is when the first pilot signal occupies the first signal. A subset of frequency resources can occur in the frequency domain or in the time domain. For example, in the first signal, the first pilot signal occupies three resource blocks a, b, and c, and in the second signal, the second pilot signal occupies two resource blocks a and c, or, in the second signal The second pilot signal occupies two resource blocks a+v and c+v, and v is an offset.

Further, based on determining the increased pilot interval, the time interval between the mth TTI and the nth TTI, and the preset at least one time range and the at least one time-frequency resource may also be a one-to-one correspondence, determining a time-frequency resource corresponding to any one of the at least one time range in which the time interval between the mth TTI and the nth TTI falls, and determining a time-frequency resource The time-frequency resource occupied by the second pilot signal. Further, the time-frequency resource corresponding to any time range defines an interval between time-frequency resources, specifically: if the time interval between the n-th TTI and the m-th TTI is within the y-th time range of the X time ranges The second pilot interval is a time-frequency resource interval corresponding to the yth time range, wherein the relationship of the X time ranges is: the preset first threshold ≥ the maximum value of the first time range ≥ the minimum of the first time range The value ≥ the maximum value of the second time range ≥ the minimum value of the second time range ≥ ... ≥ the maximum value of the X-th time range ≥ the minimum value of the X-th time range, and the resource value corresponding to the time range including the smaller the time value included The larger the interval, X is an integer greater than 1, y ≤ X.

That is to say, the smaller the interval between two adjacent TTIs, the sparse the pilot signal in the transmitted signal to further save resources.

S306: The transmitting end sends the third signal by using the first transmission resource at the nth TTI, where the third signal includes the second data signal and the first pilot signal.

That is to say, if the first transmission resource does not satisfy the first preset condition, the original pilot signal is still used without using the sparse pilot signal.

It should be noted that whether the pilot signal in the second signal or the third signal is the same as the pilot signal in the first signal, the data signal (second data signal) in the second signal and the data in the first signal The signal (the first data signal) may be the same or different. For example, if the receiving end indicates that the receiving end has correctly received the data signal in the first signal by using the HARQ ACK, a new data signal may be sent in S305 or S306. If the HARQ ACK indicates not If the first signal is correctly received, the data signal in the first signal may be retransmitted in S305 or S306. The retransmission may be repeated to send the data signal in the first signal repeatedly, or may be the data signal in the first signal. The other redundancy version (RV) is sent out, or the data signal transformation form in the first signal may be sent out.

S307: The receiving end determines whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition, if yes, executes S308, and if not, executes S309.

The judging process includes any one of the following:

a. Determine whether the time interval between the nth TTI and the mth TTI is less than a preset first threshold.

b. Determine whether the frequency band to be used when the nth TTI receives the signal is the same as the frequency band used when receiving the first signal.

c. Determine whether the frequency band to be used when the nth TTI receives the signal is a subset of the frequency band used when receiving the first signal.

d. Determine whether the coherence time of the channel to be used when the nth TTI receives the signal and the channel used when receiving the first signal is greater than a preset second threshold.

e. Determine whether the coherence time of the channel to be used when the nth TTI receives the signal and the channel used when receiving the first signal is greater than the time interval of the adjacent two received data signals.

f. Determine whether the mth TTI and the nth TTI are in a TTI binding state.

g. In the MIMO mode, determining whether the precoding information to be used when receiving the signal in the nth TTI is the same as the precoding information used when receiving the first signal, where the precoding information is At least one of the rank sum precoding matrices.

S308: In the nth TTI, the receiving end receives the second pilot signal on the first transmission resource by using a preset second pilot interval, and performs channel estimation according to the received second pilot signal, and then performs channel estimation according to the channel estimation. The result is a second data signal.

Specifically, if the time interval between the nth TTI and the mth TTI is within the yth time range of the X time ranges, the interval of the time frequency resource corresponding to the yth time range is used as the second Pilot interval.

The relationship between the X time ranges is: the preset first threshold ≥ the maximum value of the first time range ≥ the minimum value of the first time range ≥ the maximum value of the second time range ≥ the second time range The minimum value ≥... ≥ the maximum value of the Xth time range ≥ the minimum value of the Xth time range, Further, the time and/or the frequency interval corresponding to the time range in which the included time value is smaller is larger, and X is an integer greater than 1, and y ≤ X.

S309: At the nth TTI, the receiving end receives the first pilot signal by using the first pilot interval on the first transmission resource, performs channel estimation according to the first pilot signal, and receives the second data signal according to the channel estimation result. .

S310: The transmitting end determines whether the second transmission resource to be used when the ith TTI transmits a signal satisfies a second preset condition, and if yes, executes S311, and if not, performs S312.

Specifically, the specific process of determining whether the time interval between the ith TTI and the mth TTI or the nth TTI is less than a preset third threshold; or determining the signal sent in the nth TTI Whether the pilot signal is the first pilot signal; or determining a frequency band to be used when the ith TTI transmits a signal and a frequency band used when transmitting the first signal or transmitting a signal at the nth TTI Whether the frequency band used at the time is the same; or determining whether the frequency band to be used when the ith TTI transmits a signal is a frequency band used when transmitting the first signal, or a frequency band used when transmitting the signal at the nth TTI a subset; or determining whether a channel to be used when the ith TTI transmits a signal and a channel used when transmitting the first signal, or a coherence time of a channel to be used when the nth TTI transmits a signal is greater than a preset fourth threshold; or determining a channel to be used when the ith TTI transmits a signal and a channel used when transmitting the first signal, or a channel to be used when the nth TTI transmits a signal coherent Whether the time interval is greater than the interval between two adjacent transmission of the data signal; or whether the i-th TTI and the m-th TTI or the n-th TTI are in a TTI-bound state; or in the multiple-input multiple-output MIMO mode, Determining whether the precoding information to be used when transmitting the signal in the i th TTI is the same as the precoding information used when transmitting the first signal, or whether the precoding information is to be used when transmitting the signal in the nth TTI, wherein The precoding information is at least one of a rank sum precoding matrix.

S311: The transmitting end sends the fourth signal by using the second transmission resource in the ith TTI, where the fourth signal includes the third data signal and the second pilot signal, or the fourth signal includes the third data signal and the third pilot signal. .

The third pilot signal has a third pilot interval, and the third pilot interval is greater than the first pilot interval. The relationship between the third data signal and the second data signal can be referred to the relationship between the second data signal and the first data signal. No longer repeat them.

The selection of the third pilot signal can be referred to in S305, and details are not described herein again.

That is to say, if the transmission resource used by the transmission signal still satisfies the condition, the third signal can keep the pilot signal unchanged compared with the second signal, and the new pilot signal can be reselected, and the new pilot signal is compared. A pilot signal is more sparse.

S312: The transmitting end sends the fifth signal in the ith TTI by using the second transmission resource, where the fifth signal includes the third data signal and the first pilot signal, that is, if the second transmission resource does not satisfy the condition, The first pilot signal is used to ensure the accuracy of channel estimation at the receiving end.

After receiving the fourth signal or the fifth signal, the receiving end receives the third signal according to the process of receiving the second signal, and details are not described herein again.

According to the above process analogy, when the transmitting end is to transmit a signal again, it can be judged whether the resource used for transmitting the signal satisfies the condition, thereby selecting the pilot signal in the signal to be transmitted according to the judgment result.

Correspondingly, the receiving end can receive the received signal in the manner of receiving the second signal. For details, refer to FIG. 3, and details are not described herein again.

It should be noted that the specific parameters, the first threshold, the second threshold, and the third threshold of the first pilot signal, the second pilot signal, and the third pilot signal may be sent by the network side to the terminal device, or The agreement can be made between the sender and the receiver in advance. When the relevant value is involved, the sender can receive the agreed value.

Specifically, the parameters involved in the embodiment, including the time threshold and/or the interval between the time-frequency resources occupied by the pilot signals, may be agreed in advance, before the transmitting and receiving parties enter the pilot switching mode, by the network side terminal. The device is delivered. For example, the network side selects several groups from the preset multiple sets of parameter values as the pilot switching mode to be activated, and the network side sends the selected groups to the terminal device through high layer signaling or physical layer signaling. Parameter value. Further, the network side may first send the selected sets of parameter values through the high layer signaling, and then deliver the subset of the selected sets of parameter values through the physical layer signaling. Alternatively, the network side sends all the preset parameter values to the terminal device through the high layer signaling, and the network side sends the time threshold and/or the corresponding pilot interval subset to the terminal device through the physical layer signaling.

As shown in FIG. 4, taking the transmitting end as the terminal device as an example, the sending process of the signal shown in FIG. 3 is:

1. When the terminal device sends a signal for the first time, the pilot interval of the pilot signal in the signal is ΔK, and the frequency domain starting position offset is v;

2. When the terminal device transmits the signal for the second time, because the time interval ΔT ₁ <T (T is the first time threshold) from the first transmission signal, the pilot interval of the pilot signal in the signal becomes ΔK' ( ΔK'>ΔK), the frequency domain start position has an offset v _shift (not shown in Figure 3);

3. When the terminal device transmits the signal for the third time, because the time interval ΔT ₂ <T from the second transmission, the pilot interval in the signal still remains ΔK′ (ΔK′>ΔK), and there is a frequency domain start position. Offset v' _shift (not shown);

4. When the terminal device transmits the signal for the fourth time, because the time interval ΔT ₃ >T from the third transmission, the pilot interval of the pilot signal in the signal is restored to ΔK, and the frequency domain start position offset is v ( v can also change).

For another example, as shown in FIG. 5, in a case where multiple processes are included in one TTI, each process performs pilot signal selection according to the method shown in FIG. 2: the UE occupies three processes, that is, process 2 , Process 3 and Process 4:

1. For the first initial transmission (first process 2), the first pilot signal is used.

2. For the retransmission of process 2, and then the initial transmission at process 2, a second pilot signal having a pilot spacing greater than the first pilot signal is used.

3. For the first two passes between the first initial transmission and the first retransmission (first process 3 and first process 4), the first pilot signal is used.

4. The second pilot signal is used for the retransmission of process 3 and process 4, and subsequent initial transmissions at both process locations.

If the initial transmission somewhere later exceeds the preset length T compared to the previous transmission, the selection mechanism of the pilot signal is restarted.

As can be seen from the above description, in the signal transmitting and receiving method described in this embodiment, if the transmission resource used for transmitting the signal satisfies the condition, a relatively sparse pilot signal is used in the transmitted signal, so that the guide can be reduced. The time-frequency resources occupied by the frequency signals are conducive to saving resources, thereby distributing more physical resources to the data, increasing the data rate, and improving system throughput.

It should be noted that a special case of the method shown in FIG. 3 is that if the time interval between the resending of the signal and the previous transmission of the signal is small, the signal transmitted by the transmitting end may not carry the pilot signal. For example, if multiple consecutive TTIs transmit signals to the same terminal device, some of the TTIs may not carry pilot signals. The receiving end directly uses the channel estimation result obtained before to receive the signal.

FIG. 6 is a schematic diagram of another method for transmitting and receiving a signal according to the embodiment of the present application. The difference is that the determining step that the transmitting end needs to perform before transmitting the signal in the nth TTI is further More to further ensure that the receiving end can pass the channel before the pilot signal becomes sparse, thereby improving the accuracy of channel estimation. Accordingly, the receiving end also needs to perform more judgment steps before receiving the signal using the pattern of the sparse pilot.

Only the differences between FIG. 6 and FIG. 3 will be described in detail below, and the same portions of FIG. 6 and FIG. 3 will not be described again.

Specifically, after S304, two decision steps S3041 and S3042 are added:

S3041: The transmitting end determines whether a Hybrid Automatic Repeat request Acknowledgement (HARQ ACK) of the first signal is received. If yes, execute S3042. If no, execute S306.

The HARQ ACK is information fed back to the transmitting end by the receiving end, and its function is to notify whether the data signal sent before the transmitting end is correctly received. As long as the receiving end detects the data signal sent before the transmitting end, the receiving end feeds back the HARQ ACK information (receive correct feedback ACK and receive error feedback NACK) to the transmitting end. Therefore, the purpose of this step is to increase the pilot signal occupation. The interval between the time-frequency resources, that is, before using the sparse pilot, the transmitting end determines that the receiving end has received the pilot signal with a small pilot interval to ensure that the receiving end can perform channel estimation according to the normal pilot signal, thereby ensuring the channel. Estimated accuracy.

It should be noted that, in the process of data transmission between the receiving end and the transmitting end, the receiving end sends the HARQ ACK information to the transmitting end as a prior art. In this embodiment, the HARQ ACK letter is used. As one of the conditions for increasing the interval between time-frequency resources occupied by the pilot signals, the receiving end can perform the HARQ ACK mechanism according to the prior art, instead of only receiving the first signal. HARQ ACK information.

S3042: The transmitting end determines whether the nth TTI is a preset type TTI. If yes, execute S305. If no, execute S306.

The preset type of TTI is a TTI that allows the pilot interval to be increased. That is to say, in this embodiment, the type of the TTI is set, one type is a TTI that allows the pilot interval to be increased, and one type is a TTI that prohibits increasing the pilot interval. When the latter transmits a signal, Sparse pilots are allowed.

Specifically, the TTI that prohibits increasing the interval of the time-frequency resources occupied by the pilot signal may be set in a preset period, for example, one TTI in each of the three TTIs that are allowed to increase the pilot interval is prohibited from increasing the pilot interval. The purpose is to transmit a dense (less pilot interval) pilot signal every three TTIs to increase the accuracy of channel estimation at the receiving end.

Specifically, for the receiving end, after S307, two steps of S3071 and S3072 are further included:

S3071: The receiving end determines whether the transmitting end receives the HARQ ACK of the first data signal, if yes, executes S3072, and if not, executes S309.

Specifically, the basis for determining whether the HARQ ACK of the first data signal is received by the transmitting end may be: starting with a time when the HARQ ACK of the first data signal is sent, and waiting for a preset duration, where the length is received according to the sending end. The time to determine and resolve the HARQ ACK is determined. That is to say, the receiving end needs to wait for a preset duration after the HARQ ACK of the first signal is sent, so as to ensure that the transmitting end has started to switch the pilot signal according to the HARQ ACK of the first signal, thereby ensuring that the receiving end and the transmitting end use synchronously. Sparse pilots.

S3072: The receiving end determines whether the nth TTI is a preset type TTI, if yes, executes S308, and if not, executes S309.

Similarly, before the sending of the signal by the i-th TTI, the step S3042 may be added, and before the third signal is received by the receiving end, the step S3072 may be added. For details, refer to FIG. 6, which is not described here.

The method shown in FIG. 6 further defines the use of the sparse pilot signal because more decision steps are introduced, which is more advantageous for accurate reception of the signal by the receiving end.

FIG. 7 shows another method of signal transmission between the transmitting end and the receiving end shown in FIG. 1. Compared with the method shown in FIG. 3 or FIG. 6, the difference is that before using the sparse pilot, The sender first informs the receiving end of the information of the pilot signal to be used.

Only the differences between FIG. 7 and FIG. 3 or FIG. 6 will be described in detail below, and the same portions will not be described again.

Specifically, in a case where the determination result of the determination step is yes, before step S305, step S305a is performed:

S305a: The transmitting end sends pilot indication information to the receiving end, where the pilot indication information is used to indicate a pilot interval of the pilot signal used by the transmitting end in the nth TTI.

The pilot interval is one of preset pilot intervals, where the preset pilot interval is a pilot interval of a pilot signal used by the transmitting end and the receiving end in data transmission, and thus includes the first pilot. Interval and second pilot interval.

It should be noted that, in this embodiment, if the transmitting end uses a sparse pilot signal, for example, a second pilot signal, the pilot indication information is used to indicate a second pilot interval of the sparse pilot signal, for example, the second pilot signal. .

Optionally, the pilot indication information may indicate one or more of a sequence used by the pilot signal, a power used by the pilot signal, and the like, in addition to the interval of the pilot signal.

Optionally, the transmitting end may send the pilot indication information to the receiving end by using physical layer control signaling, for example, carrying the pilot indication information in the physical layer control signaling and sending the information to the receiving end.

Optionally, at any one of the TTIs, the transmitting end may send pilot indication information for indicating a pilot interval used in the current TTI.

Accordingly, before S307, S307a is executed:

S307a: The receiving end determines whether the pilot indication information is received, if yes, executes S3091, and if not, executes S307.

S3091: The receiving end receives the second pilot signal by using a pilot interval indicated by the pilot indication information, and receives the second data signal according to the second pilot signal.

Similarly, before the transmitting end of the ith TTI, the S305a may be performed. Accordingly, before the receiving end receives the third signal, S307a may also be performed.

In the method shown in FIG. 7, the transmitting end first sends a pilot indication message to the receiving end to inform the receiving. The pattern of the sparse pilot signal used in the received signal will improve the accuracy of the channel estimation at the receiving end.

In addition to the above purposes, it should be noted that in the methods shown in FIG. 3, FIG. 6, and FIG. 7, in the case where the determination result of each determination step at the transmitting end is yes, there may be other reasons, such as the transmitting end. The HARQ ACK of the transmitted signal is not received for a long time, and the transmitting end does not use the sparse pilot, that is, although the condition is satisfied, the transmitting end still uses the dense pilot. In this case, the pilot indication information sent by the transmitting end is used. Instructing the first pilot interval to ensure that even if the condition is met, based on the mechanism in which the receiving end preferentially detects the pilot indication information shown in FIG. 7, the receiving end still uses the dense pilot to receive the signal, and does not follow the judgment result using the sparse pilot. The signal is received to ensure the accuracy of the channel estimation.

It should be noted that, in the methods shown in FIG. 3, FIG. 6, and FIG. 7, if the network side confirms that the current state is not applicable to the pilot signal switching mode, the pilot device may be negotiated to exit the pilot signal switching mode, and the transmitting end And the receiving end can perform signal transmission according to the prior art.

The present invention also provides an embodiment of a signaling method, the method comprising:

Determining a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and each of the at least two TTIs has a different pilot interval For example, the base station may transmit pilots according to a predetermined pilot interval in each TTI, and the pilot intervals in different TTIs may be different. For example, the pilot transmission format specifies the pilot intervals corresponding to the two TTIs. The first TTI corresponds to the first pilot interval, the second TTI corresponds to the second pilot interval, and the first pilot interval and the second pilot interval are not equal. For another example, the pilot transmission format specifies a pilot interval corresponding to each of the three TTIs, where the first TTI corresponds to the first pilot interval, the second TTI corresponds to the second pilot interval, and the first pilot interval and the second pilot If the interval is not equal, the pilot interval corresponding to the third TTI may be the first pilot interval, or the second pilot interval, or may be the third pilot interval, the third pilot interval and the first pilot. The interval and the second pilot interval are not equal.

The pilot is periodically transmitted in accordance with the pilot transmission format in at least one TTI. It should be noted that the periodic transmission pilot refers to the pilot interval of each of the N TTIs specified by the pilot transmission format, and periodically transmits the pilot as a basis of the loop, where N is greater than 1 Integer. Exemplarily, it is assumed that the pilot transmission format specifies a pilot interval corresponding to each of the two TTIs, that is, a first pilot interval and a second pilot interval; if currently used in three TTIs The first TTI uses a first pilot interval, the second TTI uses a second pilot interval, and the third TTI uses a first pilot interval; if it is a continuous multiple TTI, the pilot intervals used by each of them may be a cyclic sequence of a first pilot interval, a second pilot interval, a first pilot interval, a second pilot interval, ...; in particular, if currently needed The number of TTIs for transmitting pilots is less than the number of TTIs specified by the pilot transmission format, and the periodic transmission of pilots according to the pilot transmission format refers to the order of pilot intervals specified in the pilot transmission format. The pilot is transmitted using the corresponding pilot interval. Exemplarily, if the pilot transmission format specifies a pilot interval corresponding to each of the two TTIs, that is, the first pilot interval and the second pilot interval, and the current TTI of the pilot to be transmitted is one, the TTI is The pilot is transmitted in the order of the pilot intervals specified by the pilot transmission format using the corresponding pilot interval, that is, the first pilot interval.

According to the method provided by the embodiment of the present invention, different pilot intervals can be used when transmitting pilots in different TTIs, and time-frequency resources can be saved compared to the conventional scheme of transmitting pilots by using fixed pilot intervals. When the pilot is transmitted with a larger pilot interval, that is, when the sparse pilot is used, the time-frequency resource corresponding to the sparse pilot can be utilized in any TTI, and the pilot is transmitted in addition to the time-frequency resource. At other times than the time, the data signal is transmitted, thereby improving the utilization of the time-frequency resource.

Optionally, the pilot transmission format is preset, or the pilot transmission format is indicated by signaling sent by the network side. Exemplarily, the pilot transmission format may be preset according to a communication protocol of the 3GPP, including: a communication protocol such as 4.5G, 5G, or the network side may indicate the base station by signaling, or may be used by the network side to perform various presets by using signaling. A pilot transmission format is determined in the pilot transmission format.

Optionally, the method further includes: sending the pilot transmission format to the terminal. The terminal needs to obtain the pilot transmission format through the protocol or the high layer signaling sent by the base station, so that the pilot can be accurately extracted from the downlink signal sent by the base station to the terminal, and the pilot is used for channel estimation, and the auxiliary data signal is received. demodulation.

Optionally, the method further includes: generating a pilot interval indication, where the pilot interval indication is used to indicate a pilot interval of a pilot carried by the terminal when transmitting uplink data; and sending the pilot interval indication And the controlling, by the terminal, the pilot to send the pilot uplink according to the pilot interval indicated by the pilot interval indication, so as to control a pilot interval used by the terminal to transmit the uplink uplink.

The embodiment of the invention further provides a signal receiving method of a terminal, including:

Receiving, by the base station, a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and each of the at least two TTIs Different frequency intervals;

And receiving, according to the pilot transmission format, a pilot that is sent by the base station in at least one TTI.

Optionally, the method further includes: receiving a pilot interval indication sent by the base station; and transmitting, when the uplink data is sent, a pilot according to the indicated pilot interval indicating the pilot interval.

In addition to the receiving methods shown in FIG. 3, FIG. 6, and FIG. 7, the receiving end may also receive signals by using a blind receiving manner. For example, in FIG. 7, if the receiving end does not receive the pilot signal indicating information, the blinding may be adopted. The receiving mode receives the signal, or, in FIG. 3, FIG. 6 and FIG. 7, the receiving end directly uses the blind receiving method to detect the pilot signal.

FIG. 8 shows the process of receiving signals by the receiving end through the blind receiving mode, and the process of transmitting signals by the transmitting end is shown in FIG. 3, FIG. 6 and FIG. 7, and details are not described herein again.

S801: At the mth TTI, the receiving end performs a correlation operation on the first pilot signal by using a preset pilot interval, respectively, to obtain an operation result.

The preset pilot interval is a pilot interval of a pilot signal used by the transmitting end and the receiving end in data transmission, and thus includes a first pilot interval and a second pilot interval.

S802: The receiving end selects a maximum operation result by comparing the operation result with a preset threshold.

S803: The receiving end determines that the signal received by the pilot interval used to obtain the maximum operation result is the first pilot signal, and receives the first data signal according to the first pilot signal.

The process of receiving the blind reception in the mth TTI is the same as the process of blind reception in the nth TTI and other TTIs, and details are not described herein again.

It can be seen from the above steps that the receiving end does not need the pilot indication information, and it is not necessary to determine whether the condition is established, but the blind receiving can determine the received pilot signal, thereby performing channel estimation, and therefore, the transmitting end is the user equipment. In this case, the transmission resources of the user equipment can be saved, and the accuracy of the channel estimation can be ensured.

FIG. 9 is a communication device according to the embodiment, including: a transmitter 901 and a coupling The processor 902 to the transmitter, optionally, further includes a receiver 903, a memory 904, and a bus.

The processor is configured to send, by the transmitter, a first signal, where the first signal includes a first data signal and a first pilot signal, and determine that the nth TTI is Whether the used first transmission resource satisfies the first preset condition; if the first transmission resource satisfies the first preset condition, using the first transmission resource in the nth TTI, by using the Transmitting, by the transmitter, a second signal, where the second signal includes a second data signal and a second pilot signal, where a second pilot interval of the second pilot is greater than a first pilot interval of the first pilot signal , m, n are natural numbers, and n>m. The receiver 903 is configured to receive a signal, specifically, to negotiate with the receiving end to enter a pilot switching mode.

The memory 904 can store program code of the operating system and other applications as well as application data. The program code stored in the memory 904 is executed by the processor 902.

The bus is used for communication between the transmitter 901, the processor 902, the receiver 903, and the memory 904.

For the specific implementation of the function of the communication device shown in Figure 9, reference may be made to the receiving end shown in Figure 3, Figure 6, and Figure 7, and details are not described herein.

Another embodiment of the present application further discloses a communication device, including: a receiver, a processor, a transmitter, a memory, and a bus.

The processor is configured to determine whether a transmission resource to be used for receiving a signal satisfies a condition. And using the dense pilot signal or the sparse pilot signal to receive the signal through the receiver according to the judgment result of the processor. The transmitter is configured to send a signal, specifically, to negotiate with the sender whether to enter the pilot switching mode.

The memory can store program code and application data for the operating system and other applications. The program code stored in the memory is executed by the processor.

The bus is used for communication between the receiver, the processor, the transmitter, and the memory.

For the specific implementation of the function of the communication device shown in this embodiment, refer to the receiving end shown in FIG. 3 or FIG. 6 , and details are not described herein again.

The embodiment of the present application further discloses a communication device, including: a receiver, a processor, and a sending , memory and bus. Different from the communication device in the previous embodiment, in this embodiment, the processor is configured to detect pilot indication information, where the pilot indication information is used to indicate a pilot interval of the sparse pilot signal, if the pilot is detected. The frequency indication information, the processor receives the pilot signal through the receiver according to the pilot indication information; otherwise, the receiver uses the dense or sparse pilot signal to receive the signal through the receiver according to whether the condition is met.

For the specific implementation of the function of the communication device in this embodiment, refer to the receiving end shown in FIG. 7 , and details are not described herein again.

The embodiment of the present application further discloses a communication device, including: a receiver and a processor coupled to the receiver, for performing blind reception on the received signal according to the process shown in FIG. 8.

The embodiment of the present invention further provides a base station, including: a processor and a transmitter coupled to the processor, and a specific structure of the base station may refer to FIG. 1;

The processor is configured to determine a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and the at least two TTIs respectively correspond to Different pilot intervals;

The transmitter is configured to periodically transmit pilots according to the pilot transmission format in at least one TTI.

The base station provided by the embodiment of the present invention can use different pilot intervals when transmitting pilots in different TTIs, and can save time-frequency resources by using a scheme that uses a fixed pilot interval to transmit pilots. The utilization of the time-frequency resource is improved.

Optionally, the pilot transmission format is preset, or the pilot transmission format is indicated by signaling sent by the network side.

Optionally, the transmitter is further configured to send the pilot transmission format to the terminal.

Optionally, the processor is further configured to generate a pilot interval indication, where the pilot interval indication is used to indicate a pilot interval of a pilot carried by the terminal when transmitting uplink data; the transmitter is further used to: Transmitting the pilot interval indication to the terminal.

The embodiment of the present invention further provides a terminal, including: a processor and a receiver coupled to the processor, and a specific structure of the terminal may refer to FIG. 1;

The receiver is configured to receive a pilot transmission format sent by a base station, where the pilot transmission format specifies a pilot interval used when transmitting pilots in at least two transmission time intervals TTI Separating, and each of the at least two TTIs has a different pilot interval;

The processor is configured to control, according to the pilot transmission format, the pilot to receive a pilot that is sent by the base station in at least one TTI.

Optionally, the terminal further includes a transmitter coupled to the processor;

The receiver is further configured to receive a pilot interval indication sent by the base station;

The processor is further configured to, when transmitting uplink data, control the transmitter to send a pilot according to the pilot interval indicated by the pilot interval indication.

The processor in the communication device in this embodiment may use a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated systems. Circuit for executing related programs.

The memory may be a read only memory (ROM), a static storage device, a dynamic storage device, or a random access memory (RAM).

The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same or similar parts of the respective embodiments may be referred to each other.

The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but the scope of the invention is to be accorded

Claims

A signal sending method, comprising:

Transmitting, by the mth transmission time interval TTI, a first signal, where the first signal includes a first data signal and a first pilot signal;

Determining whether the first transmission resource to be used when the signal is transmitted by the nth TTI satisfies a first preset condition;

And transmitting, in the nth TTI, the second signal by using the first transmission resource, where the first transmission resource meets the first preset condition, where the second signal includes a second data signal and a second a pilot signal, wherein a second pilot interval of the second pilot signal is greater than a first pilot interval of the first pilot signal, m, n are both natural numbers, and n>m.
The method of claim 1 further comprising:

And sending, by the first transmission resource, a third signal, where the third signal includes the second data signal, if the first transmission resource does not meet the first preset condition. And the first pilot signal.
The method according to claim 1 or 2, wherein the determining whether the first transmission resource used for transmitting the signal at the nth TTI satisfies the first preset condition comprises:

Determining whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or

Determining whether a frequency band to be used when transmitting the signal at the nth TTI is the same as a frequency band used when transmitting the first signal; or

Determining whether a frequency band to be used when transmitting the signal at the nth TTI is a subset of a frequency band used when transmitting the first signal; or

Determining whether a coherence time of a channel to be used when the nth TTI transmits a signal and a channel used when transmitting the first signal is greater than a preset second threshold; or

Determining whether a coherence time of a channel to be used when the nth TTI transmits a signal and a channel used when transmitting the first signal is greater than a time interval between two adjacent transmission data signals; or

Determining whether the mth TTI and the nth TTI are in a TTI binding state; or

In the MIMO mode, determining whether the precoding information to be used when transmitting the signal in the nth TTI is the same as the precoding information used when transmitting the first signal, where The precoding information is at least one of a rank sum precoding matrix.
The method according to claim 3, wherein the determining whether the first transmission resource used for transmitting the signal in the nth TTI satisfies the first preset condition further comprises:

Determining whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.
The method according to claim 3 or 4, wherein the transmitting, by the nth TTI, the second signal by using the first transmission resource comprises:

And transmitting, in the nth TTI, the second signal by using the first transmission resource when receiving the hybrid automatic repeat request response HARQ ACK of the first signal.
The method according to claim 3, wherein before the transmitting, by the nth TTI, the second signal by using the first transmission resource, the method further includes:

And according to a time interval between the mth TTI and the nth TTI, and a one-to-one correspondence between a preset at least one time range and at least one time-frequency resource, the mth TTI and the first The time-frequency resource corresponding to any time range in the at least one time range that is included in the time interval between the TTIs is determined to be a time-frequency resource occupied when the second pilot signal is transmitted.
The method according to any one of claims 1 to 6, further comprising:

Determining whether the second transmission resource to be used when the ith TTI transmits a signal satisfies a second preset condition;

Transmitting, by the second transmission resource, a fourth signal, where the fourth signal includes a third data signal and the second transmission resource, if the second transmission resource meets the second preset condition a second pilot signal, or the fourth signal includes the third data signal and a third pilot signal, wherein a third pilot interval of the third pilot signal is greater than the first pilot interval , i is a natural number and i>n;

And transmitting, in the case that the second transmission resource does not satisfy the second preset condition, the fifth signal, where the fifth signal includes the third data signal and the first pilot signal.
The method according to claim 7, wherein the determining whether the second transmission resource to be used when the ith TTI transmits a signal satisfies the second preset condition comprises:

Determining whether the time interval between the ith TTI and the mth TTI or the nth TTI is small At a preset third threshold; or

Determining whether a pilot signal of the signal transmitted in the nth TTI is the first pilot signal; or

Determining whether a frequency band to be used when the ith TTI transmits a signal is the same as a frequency band used when transmitting the first signal or a frequency band used when transmitting the signal at the nth TTI; or

Determining whether a frequency band to be used when the ith TTI transmits a signal is a frequency band used when transmitting the first signal, or a subset of frequency bands used when the nth TTI transmits a signal; or

Determining whether a channel to be used when the ith TTI transmits a signal and a channel used when transmitting the first signal, or a coherence time of a channel to be used when the nth TTI transmits a signal is greater than a preset number Four thresholds; or

Determining whether a channel to be used when the ith TTI transmits a signal and a channel used when transmitting the first signal, or a coherence time of a channel to be used when the nth TTI transmits a signal is greater than two adjacent times The time interval at which the data signal is sent; or

Determining whether the i th TTI and the m th TTI or the n th TTI are in a TTI binding state; or

In the multiple input multiple output MIMO mode, determining precoding information to be used when transmitting the signal in the i th TTI and precoding information used when transmitting the first signal, or when transmitting the signal in the nth TTI Whether precoding information is used is the same, wherein the precoding information is at least one of a rank sum precoding matrix.
The method according to any one of claims 1 to 8, further comprising:

Transmitting pilot indication information, where the pilot indication information is used to indicate that the first pilot interval is used in the mth TTI, or the second pilot interval is used in the nth TTI, or The first pilot interval is used in the m TTI and the second pilot interval is used in the nth TTI.
The method according to any one of claims 1 to 9, wherein before the determining whether the first transmission resource to be used when the nth TTI transmits a signal satisfies the first preset condition, the method further includes:

Transmitting a pilot switching mode ON request to the receiving end, and receiving a pilot switching mode ON command sent by the receiving end in response to the pilot switching mode ON request;

Or receiving a pilot switching mode on command sent by the receiving end;

Alternatively, a pilot switching mode on command is sent to the receiving end.
A signal receiving method, comprising:

Receiving, at the mth transmission time interval TTI, a first pilot signal using a preset first pilot interval, and receiving the first data signal according to the first pilot signal;

At the nth TTI, determining whether the first transmission resource to be used when receiving the signal satisfies the first preset condition;

Receiving, by using the preset second pilot interval, the second pilot signal on the first transmission resource, where the first transmission resource meets the first preset condition, and according to the second guide The frequency signal receives the second data signal, wherein the second pilot interval is greater than the first pilot interval, m, n are both natural numbers, and n>m.
The method of claim 11 further comprising:

Receiving, by the first pilot interval, the first pilot signal on the first transmission resource, where the first transmission resource does not satisfy the first preset condition, and according to the A pilot signal receives the second data signal.
The method according to claim 10 or 11, wherein the determining whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition comprises:

Determining whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or

Determining whether a frequency band to be used when receiving the signal at the nth TTI is the same as a frequency band used when receiving the first signal; or

Determining whether a frequency band to be used when the nth TTI receives a signal is a subset of a frequency band used when receiving the first signal; or

Determining whether a coherence time of a channel to be used when the nth TTI receives a signal and a channel used when receiving the first signal is greater than a preset second threshold; or

Determining whether a coherence time of a channel to be used when the nth TTI receives a signal and a channel used when receiving the first signal is greater than a time interval of two adjacent received data signals; or

Determining whether the mth TTI and the nth TTI are in a TTI binding state; or

In the multiple input multiple output MIMO mode, it is determined that the nth TTI will be used when receiving the signal. The precoding information is the same as the precoding information used when receiving the first signal, wherein the precoding information is at least one of a rank sum precoding matrix.
The method according to claim 13, wherein the determining whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition further includes:

Determining whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.
The method according to claim 13 or 14, wherein the receiving, by using the preset second pilot interval, the second pilot signal on the first transmission resource comprises:

And in the case that the hybrid automatic repeat request response HARQ ACK of the first data signal is received by the transmitting end of the first data signal, on the first transmission resource, using the preset second guide The second pilot signal is received at a frequency interval.
The method according to claim 13, wherein the receiving the second pilot signal by using the preset second pilot interval comprises:

And using the mth TTI and the first according to a time interval between the mth TTI and the nth TTI, and a one-to-one correspondence between a preset at least one time range and at least one time-frequency resource And receiving, by the time interval between the TTIs, the time-frequency resource corresponding to any time range in the at least one time range, receiving the second pilot signal.
The method according to any one of claims 11 to 16, wherein before the determining whether the first transmission resource to be used when the signal is received satisfies the first preset condition, the method further includes:

Receiving a pilot switching mode on command sent by the transmitting end;

Or receiving a pilot switching mode ON request from the transmitting end, and sending a pilot switching mode ON command in response to the pilot switching mode ON request to the transmitting end;

Or sending a pilot switching mode on command to the sending end.
A signal receiving method, comprising:

Receiving, at the mth transmission time interval TTI, a first pilot signal using a preset first pilot interval, and receiving the first data signal according to the first pilot signal;

At the nth TTI, detecting a second pilot interval from the received pilot indication information, where the second pilot interval is greater than the first pilot interval;

Receiving, at the nth TTI, the second pilot signal using the second pilot interval, and receiving the second data signal according to the second pilot signal.
The method of claim 18, further comprising:

If the pilot indication information is not detected, determining whether the first transmission resource to be used when the nth TTI receives a signal satisfies a first preset condition, where the first transmission resource does not satisfy the In the case of the first preset condition, the second pilot signal is received by using the first pilot interval on the first transmission resource, where the first transmission resource satisfies the first preset condition In the case of the first transmission resource, the second pilot signal is received by using the preset second pilot interval, and the second data signal is received according to the second pilot signal.
The method of claim 18, further comprising:

If the pilot indication information is not detected, in the nth TTI, the second pilot signal is blindly received using a preset pilot interval, and the first pilot signal is received according to the second pilot signal. Two data signals.
The method according to claim 19, wherein the determining whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition comprises:

Determining whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or

Determining whether a frequency band to be used when receiving the signal at the nth TTI is the same as a frequency band used when receiving the first signal; or

Determining whether a frequency band to be used when the nth TTI receives a signal is a subset of a frequency band used when receiving the first signal; or

Determining whether a coherence time of a channel to be used when the nth TTI receives a signal and a channel used when receiving the first signal is greater than a preset second threshold; or

Determining whether a coherence time of a channel to be used when the nth TTI receives a signal and a channel used when receiving the first signal is greater than a time interval of two adjacent received data signals; or

Determining whether the mth TTI and the nth TTI are in a TTI binding state; or

In the MIMO mode, determining whether the precoding information to be used when the nth TTI receives a signal is the same as the precoding information used when receiving the first signal, where The precoding information is at least one of a rank sum precoding matrix.
The method according to claim 21, wherein the determining whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition further includes:

Determining whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.
The method according to claim 21 or 22, wherein, on the first transmission resource, receiving the second pilot signal by using the preset second pilot interval comprises:

And in a case that the hybrid automatic repeat request response HARQ ACK of the first data signal is received by the transmitting end of the first data signal, on the first transmission resource, using the preset second guide The second pilot signal is received at a frequency interval.
A signal receiving method, comprising:

At the mth TTI, the first pilot signal is blindly received using a preset pilot interval, and the first data signal is received according to the first pilot signal;

In the nth TTI, the second pilot signal is blindly received by using the preset pilot interval, and the second data signal is received according to the second pilot signal, where the preset pilot interval includes at least the first a pilot interval and a second pilot interval, the second pilot interval being greater than the first pilot interval.
The method according to claim 24, wherein the blindly receiving the first pilot signal by using the preset pilot interval respectively comprises:

Performing a correlation operation on the first pilot signal by using a preset pilot interval, respectively, to obtain an operation result;

The signal received by the pilot interval used to determine the maximum computation result is determined to be the first pilot signal.
A communication device, comprising:

a transmitter and a processor coupled to the transmitter;

The processor is configured to send, by the transmitter, a first signal, where the first signal includes a first data signal and a first pilot signal, in a mth transmission time interval TTI;

The processor is further configured to:

Determining whether the first transmission resource to be used in the nth TTI satisfies a first preset condition; and in the case that the first transmission resource satisfies the first preset condition, in the nth TTI Transmitting, by the transmitter, a second signal, where the second signal includes a second data signal and a second pilot signal, where a second pilot interval of the second pilot is greater than the first The first pilot interval of a pilot signal, m, n are all natural numbers, and n>m.
The communication device of claim 26, wherein the processor is further configured to:

If the first transmission resource does not satisfy the first preset condition, use the first transmission resource in the nTTI, and send a third signal by using the transmitter, where the third signal includes Describe the second data signal and the first pilot signal.
The communication device according to claim 26 or 27, wherein the determining, by the processor, whether the first transmission resource to be used when the nth TTI meets the first preset condition comprises:

The processor is specifically configured to: determine whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or determine whether a frequency band to be used when the nth TTI transmits a signal The frequency band used in the first signal is the same; or determining whether a frequency band to be used when the nth TTI transmits a signal is a subset of a frequency band used when transmitting the first signal; or determining in the n whether the coherence time of the channel to be used when the TTI transmits the signal and the channel used when transmitting the first signal is greater than a preset second threshold; or determining the channel to be used when transmitting the signal at the nth TTI Whether the coherence time of the channel used by the first signal is greater than a time interval between two adjacent transmission data signals; or determining whether the mth TTI and the nth TTI are in a TTI-bound state; or In the multiple MIMO mode, it is determined whether the precoding information to be used when transmitting the signal in the nth TTI is the same as the precoding information used in transmitting the first signal, where the precoding information is a rank and a precoding moment. At least one of the arrays.
The communication device of claim 28, wherein the processor is further configured to:

Determining whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.
The communication device according to claim 28 or 29, wherein said processor uses said first transmission resource at said nth TTI and transmits a second signal through said transmitter include:

The processor is specifically configured to: when receiving the hybrid automatic repeat request response HARQ ACK of the first signal, use the first transmission resource in the nth TTI, and send the first transmission resource by using the transmitter Two signals.
The communication device of claim 28, wherein the processor is further configured to:

And according to a time interval between the mth TTI and the nth TTI, and a one-to-one correspondence between a preset at least one time range and at least one time-frequency resource, the mth TTI and the first The time-frequency resource corresponding to any time range in the at least one time range that is included in the time interval between the TTIs is determined to be a time-frequency resource occupied when the second pilot signal is transmitted.
The communication device according to any one of claims 26 to 31, wherein the processor is further configured to:

Determining whether the second transmission resource to be used when the ith TTI transmits a signal satisfies a second preset condition;

If the second transmission resource satisfies the second preset condition, using the second transmission resource in the ith TTI, sending, by the processor, a fourth signal, where the fourth signal includes a third data signal and the second pilot signal, or the fourth signal includes the third data signal and a third pilot signal, wherein a third pilot interval of the third pilot signal is greater than The first pilot interval, i is a natural number and i>n;

If the second transmission resource does not meet the second preset condition, using the second transmission resource in the ith TTI, and sending, by the processor, a fifth signal, where the fifth signal includes The third data signal and the first pilot signal.
The communication device according to claim 32, wherein the determining, by the processor, whether the second transmission resource to be used when the ith TTI transmits a signal satisfies the second preset condition comprises:

The processor is specifically configured to determine whether a time interval between the ith TTI and the mth TTI or the nth TTI is less than a preset third threshold; or determine a signal sent by the nth TTI Whether the pilot signal is the first pilot signal; or determining a frequency band to be used when the ith TTI transmits a signal and a frequency band used when transmitting the first signal or at the nth Whether the frequency band used when the TTI transmits a signal is the same; or determining whether a frequency band to be used when the ith TTI transmits a signal is a frequency band used when transmitting the first signal, or when the nth TTI transmits a signal a subset of the frequency bands; or a channel to be used when the ith TTI transmits a signal and a channel used when transmitting the first signal, or a channel to be used when the nth TTI transmits a signal Whether the time is greater than a preset fourth threshold; or determining whether the channel to be used when the ith TTI transmits a signal and the channel used when transmitting the first signal, or when the nth TTI transmits a signal Whether the coherence time of the channel is greater than the time interval between two adjacent transmission of the data signal; or determining whether the i-th TTI and the m-th TTI or the n-th TTI are in a TTI-bound state; In the MIMO mode, determining precoding information to be used when the i th TTI transmits a signal and precoding information used when transmitting the first signal, or using a precoding signal when transmitting the signal in the nth TTI Whether the information is the same, wherein the precoding information is at least one of a rank sum precoding matrix.
The communication device according to any one of claims 26 to 33, wherein the processor is further configured to:

Transmitting, by the transmitter, pilot indication information, where the pilot indication information is used to indicate that the first pilot interval is used in the mth TTI, or the second pilot interval is used in the nth TTI Or using the first pilot interval in the mth TTI and the second pilot interval in the nth TTI.
The communication device according to any one of claims 26 to 34, wherein the processor is further configured to:

Transmitting, by the transmitter, a pilot switching mode on request to the receiving end, and receiving a pilot switching mode on command sent by the receiving end in response to the pilot switching mode on request; or receiving the receiving end The pilot switching mode is turned on; or the pilot switching mode on command is sent to the receiving end by the transmitter.
A communication device, comprising:

a receiver and a processor coupled to the receiver;

The processor is configured to receive, by using a preset first pilot interval, a first pilot signal by using the first transmission interval, and receiving, by the receiver, according to the first pilot signal, according to the first transmission time interval TTI First data signal;

The processor is further configured to:

In the nth TTI, determining whether the first transmission resource to be used when the signal is received satisfies a first preset condition; and in the case that the first transmission resource satisfies the first preset condition, in the first transmission resource Receiving, by the receiver, a second pilot signal by using a preset second pilot interval, and receiving, by the receiver, a second data signal according to the second pilot signal, the second pilot interval More than the first pilot interval, m, n are all natural numbers, and n>m.
The communication device of claim 36, wherein the processor is further configured to:

Receiving, by the receiver, the first pilot signal by using the first pilot interval on the first transmission resource, where the first transmission resource does not meet the first preset condition, And receiving, by the receiver, the second data signal according to the first pilot signal.
The communication device according to claim 36 or 37, wherein the determining, by the processor, whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition comprises:

The processor is specifically configured to: determine whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or determine whether a frequency band to be used when the nth TTI receives a signal The frequency band used in the first signal is the same; or determining whether a frequency band to be used when the nth TTI receives a signal is a subset of a frequency band used when receiving the first signal; or determining n whether the coherence time of the channel to be used when the TTI receives the signal and the channel used when receiving the first signal is greater than a preset second threshold; or determining the channel and reception to be used when the nth TTI receives the signal Whether the coherence time of the channel used by the first signal is greater than a time interval of two adjacent received data signals; or determining whether the mth TTI and the nth TTI are in a TTI binding state; or In the multiple MIMO mode, it is determined whether the precoding information to be used when the nth TTI receives a signal is the same as the precoding information used when receiving the first signal, where the precoding information is a rank and a precoding moment. At least one of the arrays.
The communication device according to claim 38, wherein the processor is further configured to: determine whether the nth TTI is a preset type of TTI, and the preset type of TTI is to allow an increase of a pilot interval. TTI.
The communication device according to claim 38 or 39, wherein said processor is configured to receive a second pilot signal through said receiver on said first transmission resource using a preset second pilot interval include:

The transmitter is specifically configured to: when the hybrid automatic repeat request response HARQ ACK of the first data signal is received by the sending end of the first data signal, use on the first transmission resource The preset second pilot interval receives a second pilot signal through the receiver.
The communication device according to claim 38, wherein the receiving, by the receiver, the second pilot signal by the receiver by using a preset second pilot interval comprises:

The receiver is specifically configured to: use a time interval between the mth TTI and the nth TTI, and a one-to-one correspondence between the preset at least one time range and the at least one time-frequency resource, according to the a time-frequency resource corresponding to any time range of the at least one time range, where the time interval between the mth TTI and the nth TTI falls, receiving the second guide by the receiver Frequency signal.
The communication device according to any one of claims 36 to 41, wherein the processor is further configured to:

Receiving, by the receiver, a pilot switching mode ON command sent by the transmitting end before determining whether the first transmission resource to be used when the received signal satisfies the first preset condition; or receiving, by the receiver, the transmitting end The pilot switching mode enables the request, and sends a pilot switching mode ON command in response to the pilot switching mode ON request to the transmitting end; or sends a pilot switching mode ON command to the transmitting end.
A communication device, comprising:

a receiver and a processor coupled to the receiver;

The processor is configured to receive, by using the preset first pilot interval, a first pilot signal by using the preset transmission interval, and receiving, by the receiver, the first pilot signal according to the first transmission time interval TTI. a data signal; and, at the nth TTI, detecting a second pilot interval from the pilot indication information received by the receiver, the second pilot interval being greater than the first pilot interval;

The processor is further configured to:

Using the second pilot interval at the nth TTI, receiving a second guide through the receiver And frequency signal, and receiving the second data signal through the receiver according to the second pilot signal.
The communication device of claim 43, wherein the processor is further configured to:

If the pilot indication information is not detected, determining whether the first transmission resource to be used when the nth TTI receives a signal through the receiver satisfies a first preset condition, in the first transmission If the resource does not satisfy the first preset condition, the second pilot signal is received by the receiver according to the first pilot interval on the first transmission resource, where the When the transmission resource satisfies the first preset condition, the second pilot signal is received by the receiver by using the preset second pilot interval on the first transmission resource, And receiving, by the receiver, the second data signal according to the second pilot signal.
The communication device of claim 43, wherein the processor is further configured to:

If the pilot indication information is not detected, in the nth TTI, a preset pilot interval is used, and the second pilot signal is blindly received by the receiver, and according to the second guide a frequency signal, the second data signal being received by the receiver.
The communication device according to claim 44, wherein the determining, by the processor, whether the first transmission resource to be used when the nth TTI receives the signal satisfies the first preset condition comprises:

The processor is specifically configured to: determine whether a time interval between the nth TTI and the mth TTI is less than a preset first threshold; or determine whether a frequency band to be used when the nth TTI receives a signal The frequency band used in the first signal is the same; or determining whether a frequency band to be used when the nth TTI receives a signal is a subset of a frequency band used when receiving the first signal; or determining n whether the coherence time of the channel to be used when the TTI receives the signal and the channel used when receiving the first signal is greater than a preset second threshold; or determining the channel and reception to be used when the nth TTI receives the signal Whether the coherence time of the channel used by the first signal is greater than a time interval of two adjacent received data signals; or determining whether the mth TTI and the nth TTI are in a TTI binding state; or In the multiple MIMO mode, it is determined whether the precoding information to be used when the nth TTI receives a signal is the same as the precoding information used when receiving the first signal, where the precoding information is a rank and a precoding moment. In the array One less.
The communication device of claim 46, wherein the processor is further configured to:

Determining whether the nth TTI is a preset type of TTI, and the preset type of TTI is a TTI that allows an increase of a pilot interval.
The communication device according to claim 46, wherein said processor is configured to receive a second pilot through said receiver on said first transmission resource using said preset said second pilot interval The signals include:

The processor is specifically configured to: when the hybrid automatic repeat request response HARQ ACK of the first data signal is received by the sending end of the first data signal, use on the first transmission resource The second pilot interval is preset, and the second pilot signal is received by the receiver.
A communication device, comprising:

a receiver and a processor coupled to the receiver;

The processor is configured to receive, by using the preset pilot interval blindness, the first pilot signal by the receiver, and receive the first data signal according to the first pilot signal, in the mth TTI; n TTI, using the preset pilot interval to receive a second pilot signal blindly through the receiver, and receiving a second data signal through the receiver according to the second pilot signal, The preset pilot interval includes at least a first pilot interval and a second pilot interval, and the second pilot interval is greater than the first pilot interval.
The communication device according to claim 49, wherein the receiver is configured to use the preset pilot interval to receive the first pilot signal blindly by the receiver, including:

The receiver is specifically configured to perform a correlation operation on the first pilot signal by using a preset pilot interval, respectively, to obtain an operation result; and determine a signal received by the pilot interval used to obtain the maximum operation result as the first A pilot signal.
A signal sending method, comprising:

Determining a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and each of the at least two TTIs has a different pilot interval ;

The pilot is periodically transmitted in accordance with the pilot transmission format in at least one TTI.
The method according to claim 51, wherein the pilot transmission format is preset, or the pilot transmission format is indicated by signaling sent by the network side.
The method of claim 51 or 52, wherein the method further comprises:

Sending the pilot transmission format to the terminal.
The method according to any one of claims 51 to 53, wherein the method further comprises:

Generating a pilot interval indication, where the pilot interval indication is used to indicate a pilot interval of a pilot carried by the terminal when transmitting uplink data;

Transmitting the pilot interval indication to the terminal.
A signal receiving method, comprising:

Receiving, by the base station, a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and each of the at least two TTIs Different frequency intervals;

And receiving, according to the pilot transmission format, a pilot that is sent by the base station in at least one TTI.
The method of claim 55, wherein the method further comprises:

Receiving a pilot interval indication sent by the base station;

When transmitting the uplink data, the pilot is transmitted according to the pilot interval indicated by the pilot interval indication.
A base station, comprising: a processor and a transmitter coupled to the processor;

The processor is configured to determine a pilot transmission format, where the pilot transmission format specifies a pilot interval respectively used when transmitting pilots in at least two transmission time intervals TTI, and the at least two TTIs respectively correspond to Different pilot intervals;

The transmitter is configured to periodically transmit pilots according to the pilot transmission format in at least one TTI.
The base station according to claim 57, wherein the pilot transmission format is preset, or the pilot transmission format is indicated by signaling sent by the network side.
The base station according to claim 57 or 58, wherein the transmitter is further configured to send the pilot transmission format to the terminal.
The base station according to any one of claims 57 to 59, wherein the processor is further configured to generate a pilot interval indication, where the pilot interval indication is used to indicate a guide carried by the terminal when transmitting uplink data. Frequency pilot interval;

The transmitter is further configured to send the pilot interval indication to the terminal.
A terminal, comprising: a processor and a receiver coupled to the processor;

The receiver is configured to receive a pilot transmission format sent by a base station, where the pilot transmission format specifies a pilot interval used when transmitting pilots in at least two transmission time intervals TTI, and the at least two The pilot intervals corresponding to each of the TTIs are different;

The processor is configured to control, according to the pilot transmission format, the pilot to receive a pilot that is sent by the base station in at least one TTI.
The terminal of claim 61, wherein the terminal further comprises a transmitter coupled to the processor;

The receiver is further configured to receive a pilot interval indication sent by the base station;

The processor is further configured to, when transmitting uplink data, control the transmitter to send a pilot according to the pilot interval indicated by the pilot interval indication.