WO2015042915A1

WO2015042915A1 - Method and device for sending and receiving signals

Info

Publication number: WO2015042915A1
Application number: PCT/CN2013/084610
Authority: WO
Inventors: 武雨春
Original assignee: 华为技术有限公司
Priority date: 2013-09-29
Filing date: 2013-09-29
Publication date: 2015-04-02
Also published as: CN104685814B; CN104685814A

Abstract

Disclosed is a method for sending and receiving signals. The method comprises: sending signals to a receiving end, wherein the signals comprise a first signal and a second signal, the first signal is at least one sequence in a preset sequence set and the second signal is a message; through presetting a mapping relationship between the at least one sequence in the first signal and a message size in the signals, enabling the receiving end to obtain the message size based on the preset mapping relationship between the at least one sequence in the first signal and the message size in the signals. Because the receiving end does not need to perform a blind test on each possible message size, an amount of computation and power consumption are reduced, and a cost and the power consumption is reduced; In addition, time frequency resources occupied by the first signal are evenly scattered in time frequency resources occupied by the second signal so that a sending end does not need to send a corresponding RS signal for the message, reducing a system overhead.

Description

Method and apparatus for transmitting and receiving signals

TECHNICAL FIELD The present invention relates to the field of communications, and in particular, to a method and apparatus for transmitting and receiving signals. Background technique

In the 3rd Generation Partnership Project (3GPP) standard, Device to Device (D2D) technology includes D2D Discovery (D2D Discovery) and D2D Communication (D2D Communication). Generally, two or more parties to the communication must first discover each other and synchronize with each other before they can start communication. The two or more parties of the communication may be synchronous (Synchronous) or asynchronous (Asynchronous). Therefore, the transmitting end needs to receive and receive first. Synchronization can be done to communicate. Summary of the invention

It is an object of the present invention to provide a method of transmitting and receiving signals, which aims to solve the problem of how the transmitting end and the receiving end realize synchronous communication.

In a first aspect, a method of transmitting a signal, the method comprising:

The transmitting end generates a signal, where the signal includes a first signal and a second signal, the first signal is at least one sequence in a preset sequence set, and the second signal is information used to carry parameters required for communication. ;

The transmitting end sends the signal to the receiving end, so that the receiving end synchronizes the message with the transmitting end by detecting the first signal and the transmitting end to synchronize.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the method further includes: pre-setting a correspondence between the at least one sequence in the first signal and the message size in the signal.

With reference to the first aspect, or the first possible implementation manner of the first aspect, in a second possible implementation manner of the first aspect, the method further includes: And time-frequency resources occupied by the first signal are uniformly distributed in a time-frequency resource occupied by the second signal.

A second aspect, a method of receiving a signal, the method comprising:

Receiving, by the receiving end, a signal sent by the transmitting end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is required for carrying communication Parameter information Message;

The receiving end detects that the first signal is synchronized with the sending end;

The receiving end demodulates the message and communicates with the transmitting end.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes: the receiving end, according to the at least one sequence in the preset first signal, and the message size in the signal. Corresponding relationship, obtaining the size of the message.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the method further includes: acquiring a channel estimation value of the message according to the first signal.

With reference to the first possible implementation of the second aspect or the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

And detecting the second signal according to the channel estimation value and the message size of the message, and acquiring the second signal.

The third aspect, a sending end, where the sending end includes:

a generating unit, configured to generate a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is a parameter required for carrying communications Message

And a sending unit, configured to send the signal to the receiving end, so that the receiving end synchronizes the message with the sending end by detecting the first signal and synchronizing the sending end to perform communication.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the sending end further includes:

And a setting unit, configured to preset a correspondence between the at least one sequence in the first signal and the message size in the signal.

With the third aspect or the first possible implementation manner of the third aspect, in a second possible implementation manner of the third aspect, the sending end further includes: And a distribution unit, configured to distribute the time-frequency resources occupied by the first signal in a time-frequency resource occupied by the second signal.

A fourth aspect, a receiving end, where the receiving end includes:

a receiving unit, configured to receive a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry Information of the parameters required for communication;

a detecting unit, configured to detect that the first signal is synchronized with the sending end;

And a demodulation unit, configured to demodulate the message and communicate with the transmitting end.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving end further includes:

And an obtaining unit, configured to acquire the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the acquiring unit is further configured to:

Obtaining a channel estimation value of the message according to the first signal.

With reference to the first possible implementation of the fourth aspect or the second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the acquiring unit is further configured to:

Compared with the prior art, the first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is preset At least one sequence in the sequence set, the second signal is information Message, and the receiver is configured according to a preset first signal according to a preset relationship between at least one sequence of the first signal and a message size in the signal. The correspondence between the at least one sequence and the message size in the signal obtains the size of the message, because the receiving end does not need to blindly check each possible message size, thereby reducing the amount of calculation and power consumption, and reducing cost and work. Consumption.

A second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and the first signal is occupied The time-frequency resources are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

A third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance The message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

BRIEF DESCRIPTION OF THE DRAWINGS In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. Obviously, the drawings in the following description are only some of the present invention. For the embodiments, those skilled in the art can obtain other drawings according to the drawings without any creative labor.

1 is a schematic structural diagram of a D2D Discovery Signal provided by the prior art; FIG. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention;

3 is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention; FIG. 3 is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention; FIG. 4 is a received signal according to an embodiment of the present invention. Method flow chart;

FIG. 5 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention; FIG.

6 is a structural diagram of a device at a receiving end according to an embodiment of the present invention;

7 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention;

FIG. 8 is a structural diagram of a device at a receiving end according to an embodiment of the present invention. detailed description The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It is understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to FIG. 1 , FIG. 1 is a schematic structural diagram of a D2D Discovery Signal provided by the prior art. The transmitting end sends a signal to the receiving end, and the signal includes a discovery signal (Discovery Singnal), and the receiving end synchronizes with the transmitting end by detecting the Discovery Singnal. The Discovery Signal may consist of a Signal Sequence or a Message, or it may consist of a Signal Sequence and a Message.

The receiving end first detects the Signal Sequence (black part in Figure 1) and the transmitting end synchronizes, and then detects the reference signal ( Reference Signal, RS) in the Message (white part in Figure 1) (the gray part in Figure 1) to obtain the Message. The channel estimate is then blindly checked for all possible message sizes using the channel estimate. If one of the message sizes is blinded by a cyclic redundancy check (CRC) check, If the blind check of one of the message sizes fails the CRC check, the other message size is blindly checked. If all the blinds of the message size fail the CRC check, then The blind test failed.

Since the receiving end needs to blindly check each possible message size, increasing the amount of calculation and power consumption is not conducive to reducing cost and power consumption. At the same time, because the corresponding RS signal needs to be sent for the Message, the overhead of the system is increased (Overhead) ).

The present invention provides a first embodiment, a second embodiment, and a third embodiment. The present invention aims to solve the problem of large computational complexity and large power consumption when the receiving end acquires the signal of the transmitting end, and reduces the overhead problem caused by the RS required by the transmitting end to send the message.

Referring to FIG. 2, FIG. 2 is a flowchart of a method for transmitting a signal according to an embodiment of the present invention. As shown in FIG. 2, the method includes the following steps:

Step 201: The transmitting end generates a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry parameters required for communication. Message

Step 202: The sending end sends the signal to the receiving end, so that the receiving end synchronizes the first signal with the sending end, and then demodulates the message and the sending end to perform communication. Letter.

Wherein, the expression form of the sequence set can be as follows:

u = 25 or 29 or 34 wherein the at least one sequence expression may be as follows: d _u __ ₂₅ ={d ₂₅ (0), d ₂₅ (l), -d ₂₅ (6l)} d _u=29 = { d ₂₉ (0), d ₂₉ (V>, -■ -d ₂₉ (6l)} d _a ^ ={d ₃₄ (0),d ₃₄ (l),-d ₃₄ (6l)} optionally, The method further includes: presetting a correspondence between the at least one sequence of the first signal and the size of the message in the signal. In the first embodiment of the present invention, as shown in reference table 1, the transmitting end presets the first signal. Corresponding relationship between at least one sequence and a message size in the signal.

Table 1

After receiving the signal sent by the sending end, the receiving end acquires the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.

The receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols.

The receiver detects the reference signal in the Message (white part of Figure 1) ( Reference Signal,

RS) (the gray portion in Fig. 1) obtains the channel estimate of the Message, and then detects the second signal with the channel estimate and the message size to obtain the second signal. A first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals. The correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.

Optionally, the method further includes:

And time-frequency resources occupied by the first signal are uniformly distributed in a time-frequency resource occupied by the second signal.

In the second embodiment of the present invention, reference is made to FIG. 3, which is a schematic structural diagram of a D2D Discovery Signal according to an embodiment of the present invention. FIG. 3b is a schematic structural diagram of another D2D Discovery Signal according to an embodiment of the present invention.

In Figure 3, the Signal Sequence (black marker in Figure 3) is evenly distributed in the Message (white marker in Figure 3). As can be seen from Figure 3a, the Signal Sequence resource for each row in the time-frequency region of the Message distribution. The number of elements (Resource Element, RE) differs by no more than 1, and the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE. After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS). (the black part in Figure 1) obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code If the cyclic redundancy check (CRC) check is successful, the blind check is considered successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are used. If the blind test did not pass the CRC check, the blind test failed. Therefore, in Embodiment 2, it is not necessary to send a corresponding RS signal for the Message, thereby reducing system overhead (Overhead).

A second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is a preset sequence set. At least one sequence, the second signal is information Message, and the time-frequency resources occupied by the first signal are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to be The Message sends the corresponding RS signal, which reduces the overhead of the system.

In the third embodiment of the present invention, the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal. Referring to Table 1, the black signal in FIG. 3a is according to the corresponding message size in Table 1. 20, the message size of the white signal in FIG. 3a can be obtained as 20; the black signal in FIG. 3b is 30 according to the corresponding message size in Table 1, and the message size of the white signal in FIG. 3b can be obtained as 30.

Because the second signal in FIG. 3 has a first signal that can be used as the reference signal RS, the receiving end obtains the channel estimation value of the Message according to the first signal, and according to the channel estimation value of the Message and the Message. The size detects the second signal to obtain a second signal.

A third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is an information message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance The message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

Referring to FIG. 4, FIG. 4 is a flowchart of a method for receiving a signal according to an embodiment of the present invention. As shown in FIG. 4, the method includes:

Step 401: The receiving end receives a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is used to carry Information of the parameters required for communication; Step 402: The receiving end detects that the first signal is synchronized with the sending end.

Optionally, the method further includes:

The receiving end acquires the message size according to the correspondence between the at least one sequence in the first signal and the message size in the signal.

In the first embodiment of the present invention, as shown in the reference table 1, the transmitting end presets a correspondence between the at least one sequence in the first signal and the message size in the signal.

The receiving end detects a reference signal ( Reference Signal, RS) in the Message (white portion in FIG. 1) (the gray portion in FIG. 1) to obtain a channel estimation value of the Message, and then uses the channel estimation value and the message size to the second. The signal is detected to obtain a second signal.

A first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals. The correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.

Optionally, the method further includes:

In Figure 3, the Signal Sequence (black mark in Figure 3) is evenly distributed in the Message (white mark in Figure 3). As can be seen from Figure 3a, the Signal Sequence resource of each line in the time-frequency region where the Message is distributed. The number of units (Resource Element, RE) differs by no more than 1, and the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed. Message RE. After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS). (the black part in Figure 1) obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code The cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in the second embodiment, it is not necessary to send a corresponding RS signal for the Message, thereby reducing the overhead of the system.

A second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. The second signal is a message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message. RS signal, which reduces system overhead.

Step 403: The receiving end demodulates the message and the sending end performs communication.

Optionally, the method further includes:

Because the second signal in FIG. 3 has a first signal that can be used as the reference signal RS, the connection The receiving end obtains the channel estimation value of the message according to the first signal, and detects the second signal according to the channel estimation value and the message size of the message, and acquires the second signal.

Referring to FIG. 5, FIG. 5 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention. As shown in FIG. 5, the sending end includes:

The generating unit 501 is configured to generate a signal, where the signal includes a first signal and a second signal, where the first signal is at least one sequence of a preset sequence set, and the second signal is required for carrying communications Parameter information Message;

The sending unit 502 is configured to send the signal to the receiving end, so that the receiving end synchronizes the message with the sending end by detecting that the first signal is synchronized with the sending end.

Optionally, the sending end 501 further includes:

The setting unit 503 is configured to preset a correspondence between the at least one sequence in the first signal and the message size in the signal.

The receiving end detects the reference signal ( Reference Signal, RS ) in the Message (white part in Figure 1) (the gray part in Figure 1) to obtain the channel estimation value of the Message, and then uses the channel estimation value and the The message size detects the second signal and acquires the second signal.

An embodiment of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between the at least one sequence in the first signal and the message size in the signal, so that the receiving end is according to the at least one of the preset first signals. The correspondence between the sequence and the size of the message in the signal obtains the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.

Optionally, the sending end further includes:

The distribution unit 504 is configured to distribute the time-frequency resources occupied by the first signal in a time-frequency resource occupied by the second signal.

In Figure 3, the Signal Sequence (black marker in Figure 3) is evenly distributed in the Message (white marker in Figure 3). As can be seen from Figure 3a, the Signal Sequence resource for each row in the time-frequency region of the Message distribution. The number of elements (Resource Element, RE) differs by no more than 1, and the number of Signal Sequence REs of each column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE. After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS). (the black part in Figure 1) obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code The cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in Embodiment 2, it is not necessary to send a corresponding RS signal for the Message, thereby reducing system overhead (Overhead).

Embodiment 2 of the present invention provides a device for transmitting a signal, where the device sends a message to a receiving end. The signal includes a first signal and a second signal, the first signal is at least one sequence of a preset sequence set, the second signal is information Message, and the first signal is occupied by The time-frequency resources are evenly distributed in the time-frequency resources occupied by the second signal, so that the transmitting end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

Embodiment 3 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is an information message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance The message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

Referring to FIG. 6, FIG. 6 is a structural diagram of a device at a receiving end according to an embodiment of the present invention. As shown in FIG. 6, the receiving end includes:

The receiving unit 601 is configured to receive a signal sent by the sending end, where the signal includes a first signal and a second signal, where the first signal is at least one sequence in a preset sequence set, and the second signal is Number is the information Message used to carry the parameters required for communication;

The detecting unit 602 is configured to detect that the first signal is synchronized with the sending end;

Optionally, the receiving end further includes:

The obtaining unit 603 is configured to obtain the message size according to the correspondence between the at least one sequence in the preset first signal and the message size in the signal.

Optionally, the obtaining unit 603 is further configured to:

In Figure 3, the Signal Sequence (black mark in Figure 3) is evenly distributed in the Message (white mark in Figure 3). As can be seen from Figure 3a, the Signal Sequence resource of each line in the time-frequency region where the Message is distributed. The number of units ( Resource Element , RE ) differs by no more than 1, each The number of Signal Sequence REs of the column differs by no more than 1, that is, the Signal Sequence RE is evenly distributed in the Message RE. After the receiving end receives the signal sent by the transmitting end, the receiving end first detects the Signal Sequence (the black part in FIG. 3) and the transmitting end synchronizes, and then detects the reference signal around the Message (the white part in FIG. 3) (Reference Signal, RS). (the black part in Figure 1) obtains the channel estimate of the Message, and then uses the channel estimate to blindly check all possible message sizes, if one of the message sizes is blinded by the cyclic redundancy code The cyclic redundancy check (CRC) check is considered to be successful. If one of the message size blind checks fails the CRC check, the other message size is blindly checked if all the message sizes are If the blind test did not pass the CRC check, the blind test failed. Therefore, in the second embodiment, it is not necessary to send a corresponding RS signal for the Message, thereby reducing the overhead of the system.

Embodiment 2 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. The second signal is a message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message. RS signal, which reduces system overhead.

The demodulation unit 603 is configured to demodulate the message and communicate with the transmitting end.

Optionally, the obtaining unit 604 is further configured to:

The receiving end may acquire the correspondence between the at least one sequence and the message size in the signal by means of mutual agreement between the protocols. Because the second signal in FIG. 3 has a first signal that can be used as the reference signal RS, the receiving end obtains the channel estimation value of the Message according to the first signal, and according to the channel estimation value of the Message and the Message. The size detects the second signal to obtain a second signal.

Embodiment 3 of the present invention provides a device for transmitting a signal, where the device sends a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is configured according to the at least one sequence in the first signal set in advance The message size is obtained by the correspondence between the size of the message and the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

FIG. 7 is a structural diagram of a device at a transmitting end according to an embodiment of the present invention. Referring to FIG. 7, FIG. 7 is a transmitting end 700 according to an embodiment of the present invention. The specific implementation of the present invention does not limit the specific implementation of the sending end. The sending end 700 includes:

A processor 701, a communications interface 702, a memory 703, and a bus 704.

The processor 701, the communication interface 702, and the memory 703 complete communication with each other via the bus 704. a communication interface 702, configured to communicate with the receiving end;

The processor 701 is configured to execute a program.

In particular, the program can include program code, the program code including computer operating instructions. The processor 701 may be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.

The memory 703 is configured to store a program. The memory 703 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory such as an read-only memory (ead-only memory). ROM ) , flash memory , hard disk drive ( HDD ) or solid state Solid-state drive (SSD). The processor 701 executes the following methods according to the program instructions stored in the memory 703:

The method further includes:

Corresponding relationship between the at least one sequence in the first signal and the message size in the signal is preset.

The method further includes:

A first embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and by setting a correspondence between at least one sequence of the first signal and a message size in the signal, so that the receiving end is configured according to the at least one sequence in the preset first signal. The correspondence between the size of the message in the signal acquires the size of the message. Since the receiving end does not need to perform blind detection on each possible message size, the amount of calculation and power consumption are reduced, and the cost and power consumption are reduced.

A third embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is a message, by setting a correspondence between the at least one sequence in the first signal and the size of the message in the signal, so that the receiving end is based on the pre-pre First, the correspondence between the at least one sequence of the first signal and the size of the message in the signal is used to obtain the size of the message, because the receiving end does not need to blindly check each possible message size, thereby reducing the amount of computation and work. Consumption, reducing cost and power consumption. And the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding RS signal for the message, thereby reducing system overhead.

FIG. 8 is a structural diagram of a device at a receiving end according to an embodiment of the present invention. Referring to FIG. 8, FIG. 8 is a receiving end 800 according to an embodiment of the present invention. The specific embodiment of the present invention does not limit the specific implementation of the receiving end. The receiving end 800 includes:

A processor 801, a communications interface 802, a memory 803, and a bus 804.

The processor 801, the communication interface 802, and the memory 803 complete communication with each other via the bus 804. a communication interface 802, configured to communicate with the sending end;

The processor 801 is configured to execute a program.

In particular, the program can include program code, the program code including computer operating instructions. The processor 801 may be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement the embodiments of the present invention.

The memory 803 is used to store a program. The memory 803 may be a volatile memory such as a random-access memory (RAM) or a non-volatile memory such as an read-only memory (ead-only memory). ROM), flash memory, hard disk drive (HDD) or solid-state drive (SSD). The processor 801 performs the following methods based on the program instructions stored in the memory 803:

The method further includes: The receiving end is configured according to the at least one sequence and the signal in the first signal set in advance

The corresponding size of the message size, and the size of the message is obtained.

The method further includes:

A second embodiment of the present invention provides a method for transmitting a signal, where the method includes transmitting a signal to a receiving end, where the signal includes a first signal and a second signal, where the first signal is at least one of a preset sequence set. a sequence, the second signal is information Message, and the time-frequency resource occupied by the first signal is evenly distributed in the time-frequency resource occupied by the second signal, so that the sending end does not need to send a corresponding message for the message. RS signal, which reduces system overhead.

The following is only a preferred embodiment of the present invention, and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

The above is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the invention.

Claims

claims

1. A method of sending signals, characterized in that the method includes:

The sending end generates a signal. The signal includes a first signal and a second signal. The first signal is at least one sequence in a preset sequence set. The second signal is a message used to carry parameters required for communication. ;

The sending end sends the signal to the receiving end, so that the receiving end synchronizes with the sending end by detecting the first signal, and then demodulates the Message to communicate with the sending end.

2. The method according to claim 1, characterized in that, the method further includes:

A corresponding relationship between the at least one sequence in the first signal and the Message size in the signal is set in advance.

3. The method according to claim 1 or 2, characterized in that the method further includes: evenly distributing the time-frequency resources occupied by the first signal among the time-frequency resources occupied by the second signal.

4. A method of receiving signals, characterized in that the method includes:

The receiving end receives a signal sent by the transmitting end. The signal includes a first signal and a second signal. The first signal is at least one sequence in a preset sequence set. The second signal is required for carrying communication. Parameter information Message;

The receiving end demodulates the Message and communicates with the sending end.

5. The method according to claim 4, characterized in that, the method further includes:

The receiving end obtains the Message size according to the preset corresponding relationship between the at least one sequence in the first signal and the Message size in the signal.

6. The method according to claim 4, characterized in that the method further includes: obtaining the channel estimate value of the Message according to the first signal.

7. The method according to claims 5 and 6, characterized in that the method further includes: detecting the second signal according to the channel estimate value of the Message and the size of the Message, and obtaining the second signal.

8. A sending end, characterized in that the sending end includes:

Generating unit, used to generate a signal, the signal includes a first signal and a second signal, the first signal The signal is at least one sequence in a preset sequence set, and the second signal is a message used to carry parameters required for communication;

The sending unit is configured to send the signal to the receiving end, so that the receiving end synchronizes with the sending end by detecting the first signal, and then demodulates the Message to communicate with the sending end.

9. The sending end according to claim 8, characterized in that the sending end further includes: a setting unit, configured to pre-set the corresponding relationship between the at least one sequence in the first signal and the Message size in the signal.

10. The transmitting end according to claim 8 or 9, characterized in that, the transmitting end further includes: a distribution unit, configured to evenly distribute the time-frequency resources occupied by the first signal among the second signals. in the occupied time and frequency resources.

11. A receiving end, characterized in that, the receiving end includes:

A receiving unit, configured to receive a signal sent by the transmitting end. The signal includes a first signal and a second signal. The first signal is at least one sequence in a preset sequence set. The second signal is used to carry Message of the parameters required for communication;

A detection unit configured to detect synchronization between the first signal and the sending end;

Demodulation unit, used to demodulate the Message and communicate with the sending end.

12. The receiving end according to claim 11, characterized in that, the receiving end further includes: an acquisition unit, configured to obtain a corresponding value based on the preset correspondence between the at least one sequence in the first signal and the Message size in the signal. Relationship, get the Message size.

13. The receiving end according to claim 11, characterized in that the obtaining unit is further configured to: obtain the channel estimate value of the Message according to the first signal.

14. The receiving end according to claim 12 or 13, characterized in that the acquisition unit is also used to:

The second signal is detected according to the channel estimate value of the Message and the size of the Message, and the second signal is obtained.