WO2016082127A1

WO2016082127A1 - Information transmission method, apparatus and system

Info

Publication number: WO2016082127A1
Application number: PCT/CN2014/092292
Authority: WO
Inventors: 刘亚林; 朱俊; 禄彼得; 罗毅; 张佳胤
Original assignee: 华为技术有限公司
Priority date: 2014-11-26
Filing date: 2014-11-26
Publication date: 2016-06-02

Abstract

Provided are an information transmission method, apparatus and system. The information transmission method of the present invention comprises: determining a pilot frequency mode for performing information transmission according to a channel condition and/or a time frequency resource allocated to the information transmission, the pilot frequency mode comprising the number and distribution of pilot frequencies and/or long training sequences; generating pilot frequency information according to the pilot frequency mode, and encapsulating the pilot frequency information and data to be sent in a data packet, the pilot frequency information comprising values of the pilot frequencies and/or the long training sequences; and sending the data packet to a receiving device, so that the receiving device performs phase tracking according to the pilot frequencies, and/or performs channel estimation according to the long training sequences. The embodiments of the present invention realize an adaptive adjustment of a pilot frequency mode based on a channel change and/or a change of a time frequency resource, and solve the problem that the pilot frequency overhead is high or insufficient, thereby reducing the packet error rate and improving the communication quality.

Description

Information transmission method, device and system

Technical field

The embodiments of the present invention relate to communication technologies, and in particular, to an information transmission method, apparatus, and system.

Background technique

The existing Institute of Electrical and Electronics Engineers (IEEE) 802.11ac adopts Carrier Sense Multiple Access (CSMA) mechanism, and only one at the same time. The station (Station, referred to as STA) communicates with the access point (Access Point, AP for short). In the next-generation Wireless Fidelity (WI-Fidelity) system, which introduces the Orthogonal Frequency Division Multiple Access (OFDMA) mechanism, scheduling and other technologies are used, and memory is available at the same time. In the case where a plurality of STAs communicate with an AP, the plurality of STAs simultaneously transmit signals to the AP, and the AP simultaneously transmits signals to different STAs.

However, since the communication paths between the STAs and the APs are not completely the same, the pilot mode in the fixed mode is used for all STAs in the prior art, and the STAs that are closer to the AP may cause excessive pilot overhead. For STAs that are farther away from the AP, there may be cases where the pilot is not enough. In addition, in the outdoor scenario, the channel environment in which the STA is located changes at any time. Therefore, using the pilot mode of the fixed mode, channel estimation and phase tracking cannot be performed accurately and in real time, resulting in an increase in the packet error rate and seriously affecting the quality of communication.

Summary of the invention

The embodiments of the present invention provide an information transmission method, device, and system, which are used to implement adaptive adjustment of a pilot mode based on channel change and/or time-frequency resource variation, and solve the problem that the pilot overhead is large or insufficient, and the error is reduced. Packet rate, improve communication quality.

In a first aspect, an embodiment of the present invention provides an information transmission method, including:

Determining a pilot pattern for information transmission based on channel conditions and/or time-frequency resources allocated for information transmission, the pilot patterns including the number and distribution of pilot and/or long training sequences;

Generating pilot information according to the pilot pattern, and encapsulating the pilot information and the data to be transmitted in a data packet, where the pilot information includes values of the pilot and/or the long training sequence;

Transmitting the data packet to a receiving device to cause the receiving device to perform phase tracking according to the pilot, and/or performing channel estimation according to the long training sequence.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the determining, by using a channel condition, a pilot mode for performing information transmission, including:

Generating initial pilot information by using a preset initial pilot mode, and transmitting a data packet encapsulated with the initial pilot information to the receiving device;

Receiving feedback information sent by the receiving device according to a result of receiving the data packet;

Obtaining the channel condition according to the feedback information, and determining the quantity and distribution of the pilot and/or the long training sequence according to the channel condition.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the determining, by the channel condition, a pilot mode for performing information transmission, including:

When the channel condition satisfies the first preset condition, determining that the pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel signal The noise ratio is changed from high to low, and the increasing the pilot mode includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a match from a plurality of sets of preset numbers according to the channel condition. The number of said pilots and/or said long training sequences, and determining the distribution of said pilots and/or said long training sequences;

When the channel condition satisfies the second preset condition, determining that the pilot mode is a reduced pilot mode, where the second preset condition includes that the channel change frequency is less than a second preset change frequency, or a channel signal The noise ratio is changed from low to high, and the reducing the pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a matching from a plurality of sets of preset numbers according to the channel condition The number of pilots and/or the long training sequences and the distribution of the pilots and/or the long training sequences.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the determining, by the channel condition, a pilot mode for performing information transmission, including:

And selecting, according to a predetermined modulation and coding scheme MCS that performs the information transmission, a quantity of the matched pilot and/or the long training sequence from the preset pilot mode correspondence information, and determining the pilot sum / or the distribution of the long training sequence.

With reference to the first aspect, in a fourth possible implementation manner of the first aspect, the determining, by the channel condition, a pilot mode for performing information transmission, including:

The number of pilots is determined based on the Doppler shift of the channel, and the distribution of the pilots is determined.

With reference to the first aspect, in a fifth possible implementation manner of the first aspect, the determining, by the channel condition, a pilot mode for performing information transmission, including:

Transmitting a pilot mode acquisition request to the receiving device;

Receiving, by the receiving device, a required pilot mode determined and transmitted according to channel conditions;

The number and distribution of the pilots and/or the long training sequences are determined based on the required pilot patterns.

With reference to the first aspect, in a sixth possible implementation manner of the first aspect, the determining, by the time-frequency resource allocated to the information transmission, determining a pilot mode for performing information transmission, including:

When the bandwidth of the time-frequency resource is less than 20 MHz, the number and distribution of the pilot and/or the long training sequence are determined according to the bandwidth of the time-frequency resource.

With reference to the sixth possible implementation manner of the first aspect, in a seventh possible implementation manner of the first aspect, the determining, by the bandwidth of the time-frequency resource, the pilot and/or the long training sequence The number and distribution, including:

When the bandwidth of the time-frequency resource is less than 5 MHz, determining that the number of the pilots and/or the long training sequence is two or four, and determining the distribution of the pilot and/or the long training sequence .

In conjunction with the sixth possible implementation of the first aspect, in an eighth possible implementation manner of the first aspect, the determining, by the bandwidth of the time-frequency resource, the pilot and/or the long training sequence The number and distribution, including:

When the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determining that the number of pilots and/or the long training sequence is four, or six, or eight, and determining the pilot sum / or the distribution of the long training sequence.

In conjunction with the sixth possible implementation of the first aspect, in a ninth possible implementation manner of the first aspect, the determining, by the bandwidth of the time-frequency resource, the pilot and/or the long training sequence The number and distribution, including:

When the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determining that the number of pilots and/or the long training sequence is six or eight, and determining the pilot and/or the long training sequence distributed.

With reference to the first aspect, in a tenth possible implementation manner of the first aspect, the determining, by the channel condition and the time-frequency resource allocated to the information transmission, determining a pilot mode for performing information transmission, including:

And selecting, according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the number of matched pilots and/or the long training sequence from the preset pilot mode correspondence information, and determining The distribution of the pilot and/or the long training sequence.

With reference to the first aspect, any one of the first to the tenth possible implementation manners of the first aspect, in the eleventh possible implementation manner of the first aspect, the generating a guide according to the pilot mode Frequency information, and the pilot information and the data to be sent are encapsulated in a data packet, including:

Obtaining, by using a preset pilot function, a value of the pilot and/or the long training sequence according to the number and distribution of the pilot and/or the long training sequence;

The values of the pilot and/or the long training sequence are encapsulated in a data field of the data packet based on the pilot and/or the distribution of the long training sequence.

With reference to the first aspect, any one of the first to the eleventh possible implementation manners of the first aspect, in the twelfth possible implementation manner of the first aspect, the data packet includes a pilot mode indication Information, the pilot mode indication information is used to cause the receiving device to determine the pilot mode of the data packet.

With reference to the first aspect, any one of the first to the twelfth possible implementation manners of the first aspect, in the thirteenth possible implementation manner of the first aspect, when there are two or more of the receiving devices The method further includes:

Determining a unified pilot pattern according to channel conditions and/or time-frequency resources allocated for information transmission, the unified pilot pattern being the corresponding pilot and/or the two of the two or more receiving devices The number and distribution of the pilots and/or the long training sequences of the receiving device having the largest number of long training sequences;

Generating the pilot information according to the unified pilot mode, and encapsulating the pilot information and the to-be-sent data in a data packet;

Transmitting the data packet to a corresponding receiving device, so that the corresponding receiving device performs phase tracking and/or channel estimation according to the pilot information.

In a second aspect, an embodiment of the present invention provides an information transmission method, including:

Receiving, by the sending device, a data packet, where the data packet includes pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, and the pilot pattern includes the pilot And/or the number and distribution of said long training sequences;

Obtaining the pilot information from the data packet according to the pilot pattern, performing phase tracking according to the pilot, and/or performing channel estimation according to the long training sequence.

With reference to the second aspect, in a first possible implementation manner of the second aspect, before the receiving the data packet sent by the sending device, the method further includes:

Receiving, by the sending device, a data packet encapsulated with initial pilot information;

And transmitting feedback information to the sending device according to the receiving result of the data packet, so that the sending device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.

With reference to the second aspect, in a second possible implementation manner of the second aspect, before the receiving the data packet sent by the sending device, the method further includes:

Receiving a pilot mode acquisition request sent by the sending device;

Obtaining a channel condition according to the pilot mode acquisition request, and determining a required pilot mode according to the channel condition and/or a time-frequency resource allocated to the information transmission;

Transmitting the required pilot pattern to the transmitting device to cause the transmitting device to determine the pilot pattern according to the required pilot pattern.

With reference to the second possible implementation of the second aspect, in a third possible implementation manner of the second aspect, the determining, by using the channel condition, the required pilot mode,

When the channel condition meets the first preset condition, determining that the required pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel The signal-to-noise ratio is changed from high to low, and the increasing the pilot pattern includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or from a plurality of preset numbers according to the channel condition. Selecting the matched pilot and/or the number of the long training sequences and determining the distribution of the pilot and/or the long training sequence;

When the channel condition satisfies the second preset condition, determining that the required pilot mode is to reduce the pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel The signal-to-noise ratio is changed from low to high, and the reducing the pilot pattern includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or from a plurality of sets of preset numbers according to the channel condition The number of matched pilots and/or the long training sequences is selected and the distribution of the pilots and/or the long training sequences is determined.

With reference to the second possible implementation manner of the second aspect, in a fourth possible implementation manner of the second aspect, the determining, by using the channel condition, the required pilot mode includes:

With reference to the second possible implementation of the second aspect, in a fifth possible implementation manner of the second aspect, the determining, by using the channel condition, the required pilot mode includes:

With the second possible implementation of the second aspect, in a sixth possible implementation manner of the second aspect, the determining, by the time-frequency resource allocated to the information transmission, the required pilot mode, including:

When the bandwidth of the time-frequency resource is less than 20 MHz, the required number of pilots and/or the length and distribution of the long training sequence are determined according to the bandwidth of the time-frequency resource.

With reference to the sixth possible implementation of the second aspect, in a seventh possible implementation manner of the second aspect, the determining, according to a bandwidth of the time-frequency resource, the required pilot and/or the length The number and distribution of training sequences, including:

When the bandwidth of the time-frequency resource is less than 5 MHz, determining that the number of the pilots and/or the long training sequence required is two or four, and determining the pilot and/or the long training sequence Distribution.

In conjunction with the sixth possible implementation of the second aspect, in an eighth possible implementation manner of the second aspect, the determining, according to a bandwidth of the time-frequency resource, the required pilot and/or the length The number and distribution of training sequences, including:

When the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determining that the required pilot and/or the number of the long training sequence is four, or six, or eight, and determining the guide Frequency and/or distribution of the long training sequence.

With reference to the sixth possible implementation manner of the second aspect, in a ninth possible implementation manner of the second aspect, the determining, according to a bandwidth of the time-frequency resource, the required pilot and/or the length The number and distribution of training sequences, including:

When the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determining that the number of the pilots and/or the long training sequence required is six or eight, and determining the pilot and/or the long training Sequence Distribution.

With reference to the second possible implementation of the second aspect, in a tenth possible implementation manner of the second aspect, the determining, by using the channel condition, a time-frequency resource allocated to information transmission, determining a required pilot mode, include:

With reference to the second aspect, the possible implementation manner of any one of the first to the tenth aspect, in the eleventh possible implementation manner of the second aspect, after the receiving the data packet sent by the sending device ,Also includes:

Obtaining pilot mode indication information from the data packet, and acquiring the pilot mode according to the pilot mode indication information.

In a twelfth possible implementation manner of the second aspect, the second aspect, the Obtaining the pilot information in the data packet, including:

The values of the pilot and/or the long training sequence are obtained from the data packet based on the number and distribution of the pilots and/or the long training sequence.

In a third aspect, an embodiment of the present invention provides a sending apparatus, including:

a pilot determining module, configured to determine a pilot mode for performing information transmission according to channel conditions and/or time-frequency resources allocated to information transmission, where the pilot pattern includes a quantity and a distribution of pilot and/or long training sequences;

Encapsulating module, configured to generate pilot information according to the pilot mode, and encapsulate the pilot information and data to be sent in a data packet, where the pilot information includes the pilot and/or the long training The value of the sequence;

And a sending module, configured to send the data packet to the receiving device, so that the receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.

With reference to the third aspect, in a first possible implementation manner of the third aspect, the pilot determining module is configured to generate initial pilot information by using a preset initial pilot mode, and encapsulate the initial guide Transmitting a data packet of the frequency information to the receiving device; receiving feedback information sent by the receiving device according to a result of receiving the data packet; acquiring the channel condition according to the feedback information, and The number and distribution of the pilots and/or the long training sequences are determined based on the channel conditions.

With reference to the third aspect, in a second possible implementation manner of the third aspect, the pilot determining module is configured to: when the channel condition meets a first preset condition, determine the pilot mode as Adding a pilot mode, where the first preset condition includes that the changed frequency of the channel is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes increasing one by one according to the channel condition. And the number of the pilots and/or the long training sequence or the number of the matched pilots and/or the long training sequence selected from a plurality of sets of preset numbers according to the channel condition, and determining the guide a frequency and/or a distribution of the long training sequence; when the channel condition satisfies a second preset condition, determining that the pilot mode is a reduced pilot mode, and the second preset condition includes a channel change frequency Less than the second preset change frequency, or the signal-to-noise ratio of the channel is changed from low to high, the reduced pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or according to the Channel The condition selects the number of matched pilots and/or the number of long training sequences from a plurality of sets of preset numbers, and determines the distribution of the pilots and/or the long training sequences.

With reference to the third aspect, in a third possible implementation manner of the third aspect, the pilot determining module is specifically configured to: according to a preset modulation and coding scheme MCS that performs the information transmission, from a preset pilot The matching of the pilot and/or the number of the long training sequences is selected in the mode correspondence information, and the distribution of the pilot and/or the long training sequence is determined.

With reference to the third aspect, in a fourth possible implementation manner of the third aspect, the pilot determining module is configured to determine a quantity of the pilot according to a Doppler frequency shift of a channel, and determine the guiding Frequency distribution.

With reference to the third aspect, in a fifth possible implementation manner of the third aspect, the pilot determining module is configured to send a pilot mode acquisition request to the receiving device, and the receiving device is determined according to a channel condition. And transmitting the required pilot pattern; determining the number and distribution of the pilot and/or the long training sequence according to the required pilot pattern.

With reference to the third aspect, in a sixth possible implementation manner of the third aspect, the pilot determining module is specifically configured to determine, according to a bandwidth of the time-frequency resource, when a bandwidth of the time-frequency resource is less than 20 MHz The number and distribution of the pilots and/or the long training sequences.

With the sixth possible implementation of the third aspect, in a seventh possible implementation manner of the third aspect, the pilot determining module is specifically configured to: when the bandwidth of the time-frequency resource is less than 5 MHz, determine The number of pilots and/or the long training sequence is 2 or 4, and the guide is determined Frequency and/or distribution of the long training sequence.

With the sixth possible implementation of the third aspect, in an eighth possible implementation manner of the third aspect, the pilot determining module is configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than At 10 MHz, the number of pilots and/or the long training sequence is determined to be four, or six, or eight, and the distribution of the pilot and/or the long training sequence is determined.

With the sixth possible implementation of the third aspect, in a ninth possible implementation manner of the third aspect, the pilot determining module is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, Determining the number of pilots and/or the long training sequences is six or eight and determining the distribution of the pilots and/or the long training sequences.

With reference to the third aspect, in a tenth possible implementation manner of the third aspect, the pilot determining module is specifically configured to: according to a predetermined MCS that performs the information transmission, and a bandwidth of the time-frequency resource The preset pilot pattern correspondence information selects the matched pilot and/or the number of the long training sequences, and determines the distribution of the pilot and/or the long training sequence.

With reference to the third aspect, any one of the first to the tenth possible implementation manners of the third aspect, in the eleventh possible implementation manner of the third aspect, the encapsulating module is specifically used according to the Deriving the number of pilots and/or the number and distribution of the long training sequences, and calculating a value of the pilot and/or the long training sequence by using a preset pilot function; according to the pilot and/or the length The distribution of the training sequence encapsulates the values of the pilot and/or the long training sequence in the data field of the data packet.

With reference to the third aspect, any one of the first to the eleventh possible implementation manners of the third aspect, in the twelfth possible implementation manner of the third aspect, the data packet includes a pilot mode indication Information, the pilot mode indication information is used to cause the receiving device to determine the pilot pattern of the data packet.

With reference to the third aspect, any one of the first to the twelfth possible implementation manners of the third aspect, in the thirteenth possible implementation manner of the third aspect, when there are two or more of the receiving devices The pilot determining module is further configured to determine a unified pilot mode according to channel conditions and/or time-frequency resources allocated for information transmission, where the unified pilot mode is the two or more receiving devices The number and distribution of the pilot and/or the long training sequence of the receiving device and/or the number of the long training sequences; the encapsulation module is further configured to The unified pilot mode generates the pilot information, and encapsulates the pilot information and the data to be sent in a data packet; the sending module is further configured to send the data packet to a corresponding receiving device, to Make The corresponding receiving device performs phase tracking and/or channel estimation based on the pilot information.

In a fourth aspect, an embodiment of the present invention provides a receiving apparatus, including:

a receiving module, configured to receive a data packet sent by the sending device, where the data packet includes a pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, where the pilot mode includes The number and distribution of the pilots and/or the long training sequences;

And a processing module, configured to acquire the pilot information from the data packet according to the pilot mode, perform phase tracking according to the pilot, and/or perform channel estimation according to the long training sequence.

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

An initial interaction module, configured to receive a data packet that is sent by the sending device and encapsulates initial pilot information, and send feedback information to the sending device according to the receiving result of the data packet, so that the sending device is configured according to the The feedback information acquires channel conditions and determines the pilot pattern based on the channel conditions.

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

a pilot determining module, configured to receive a pilot mode acquisition request sent by the sending device, acquire a channel condition according to the pilot mode acquisition request, and determine according to the channel condition and/or a time-frequency resource allocated to information transmission a required pilot pattern; transmitting the required pilot pattern to the transmitting device to cause the transmitting device to determine the pilot pattern according to the required pilot pattern.

With the second possible implementation of the fourth aspect, in a third possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to: when the channel condition meets a first preset condition, Determining that the required pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel signal to noise ratio changes from high to low, and the increase guide The frequency mode includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting the matched pilots and/or the lengths from a plurality of sets of preset numbers according to the channel conditions. And the number of training sequences is determined, and the distribution of the pilot and/or the long training sequence is determined; when the channel condition satisfies the second preset condition, determining the required pilot mode is to reduce the pilot mode, The second preset condition includes that a frequency of change of the channel is smaller than a second preset change frequency, or a signal to noise ratio of the channel is changed from low to high, and the reducing the pilot mode includes decreasing the pilot and the one by one according to the channel condition. /or Determining the number of the long training sequences or selecting the matched pilots and/or the number of the long training sequences from the plurality of preset numbers according to the channel conditions, and determining the pilots and/or Or the distribution of the long training sequence.

In conjunction with the second possible implementation of the fourth aspect, in a fourth possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to perform a modulation and coding scheme for performing the information transmission according to a predetermined manner. The MCS selects, from the preset pilot mode correspondence information, the number of the matched pilots and/or the long training sequence, and determines the distribution of the pilot and/or the long training sequence.

With reference to the second possible implementation of the fourth aspect, in a fifth possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to determine the pilot according to a Doppler frequency shift of a channel. The number and determine the distribution of the pilots.

With the second possible implementation of the fourth aspect, in a sixth possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, according to The bandwidth of the time-frequency resource determines the number and distribution of the pilots and/or the long training sequences required.

With reference to the sixth possible implementation manner of the foregoing aspect, in a seventh possible implementation manner of the fourth aspect, the pilot determining module is configured to determine, when the bandwidth of the time-frequency resource is less than 5 MHz, The number of said pilots and/or said long training sequences required is two or four and the distribution of said pilots and/or said long training sequences is determined.

With reference to the sixth possible implementation manner of the fourth aspect, in the eighth possible implementation manner of the fourth aspect, the pilot determining module is configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than At 10 MHz, it is determined that the number of said pilots and/or said long training sequences required is four, or six, or eight, and the distribution of said pilots and/or said long training sequences is determined.

With the sixth possible implementation of the fourth aspect, in a ninth possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, Determining the number of said pilots and/or said long training sequences required is six or eight and determining the distribution of said pilots and/or said long training sequences.

With reference to the second possible implementation manner of the fourth aspect, in a tenth possible implementation manner of the fourth aspect, the pilot determining module is specifically configured to perform MCS according to the predetermined information transmission, and The bandwidth of the time-frequency resource selects the matched pilot and/or the number of the long training sequence from the preset pilot mode correspondence information, and determines the pilot and/or the long training sequence. distributed.

With reference to the fourth aspect, any one of the first to the tenth possible implementation manners of the fourth aspect, in the eleventh possible implementation manner of the fourth aspect, the receiving module is further used for The pilot mode indication information is obtained in the data packet, and the pilot mode is acquired according to the pilot mode indication information.

With reference to the fourth aspect, any one of the first to the eleventh possible implementation manners of the fourth aspect, in the twelfth possible implementation manner of the fourth aspect, the processing module is specifically used according to And the number and distribution of the pilot and/or the long training sequence, the values of the pilot and/or the long training sequence are obtained from the data packet.

In a fifth aspect, an embodiment of the present invention provides a sending device, including:

a processor, configured to determine a pilot pattern for performing information transmission according to channel conditions and/or time-frequency resources allocated for information transmission, where the pilot pattern includes a quantity and a distribution of pilot and/or long training sequences; The pilot mode generates pilot information, and encapsulates the pilot information and the data to be transmitted in a data packet, where the pilot information includes values of the pilot and/or the long training sequence;

And a transmitter, configured to send the data packet to the receiving device, so that the receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the method further includes: a receiver;

The processor is configured to generate initial pilot information by using a preset initial pilot mode, where the transmitter is further configured to send a data packet encapsulated with the initial pilot information to the receiving device; a receiver, configured to receive feedback information that is sent by the receiving device according to a result of receiving the data packet, where the processor is configured to acquire the channel condition according to the feedback information, and determine, according to the channel condition, The number and distribution of pilots and/or the long training sequences are described.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the processor is configured to: when the channel condition meets a first preset condition, determine that the pilot mode is an increase guide In the frequency mode, the first preset condition includes that the changing frequency of the channel is greater than the first preset changing frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode comprises increasing the one by one according to the channel condition. a pilot and/or a number of the long training sequences or selecting a number of the matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition, and determining the pilot sum And a distribution of the long training sequence; when the channel condition satisfies a second preset condition, determining that the pilot mode is a reduced pilot mode, and the second preset condition includes a channel change frequency Less than the second preset change frequency, or the signal-to-noise ratio of the channel is changed from low to high, the reduced pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or according to the The channel condition selects the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers, and determines the distribution of the pilot and/or the long training sequence.

With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, the processor is specifically configured to respond to a preset pilot mode according to a predetermined modulation and coding scheme MCS that performs the information transmission. The number of matched pilots and/or the long training sequence is selected in the information, and the distribution of the pilot and/or the long training sequence is determined.

With reference to the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the processor is configured to determine a quantity of the pilot according to a Doppler frequency shift of a channel, and determine the pilot distributed.

With reference to the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the receiver is further included;

The transmitter is further configured to send a pilot mode acquisition request to the receiving device, where the receiver is configured to receive a required pilot mode that is determined and sent by the receiving device according to a channel condition; the processor, Also used to determine the number and distribution of the pilots and/or the long training sequences based on the required pilot patterns.

With reference to the fifth aspect, in a sixth possible implementation manner of the fifth aspect, the processor is configured to determine, according to a bandwidth of the time-frequency resource, when the bandwidth of the time-frequency resource is less than 20 MHz The number and distribution of pilots and/or the long training sequences.

With reference to the sixth possible implementation manner of the fifth aspect, in a seventh possible implementation manner of the fifth aspect, the processor is configured to determine, when the bandwidth of the time-frequency resource is less than 5 MHz, The number of pilots and/or the long training sequences is two or four and the distribution of the pilots and/or the long training sequences is determined.

In conjunction with the sixth possible implementation of the fifth aspect, in an eighth possible implementation manner of the fifth aspect, the processor is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz Determining that the number of pilots and/or the long training sequence is four, or six, or eight, and determining the distribution of the pilot and/or the long training sequence.

With reference to the sixth possible implementation manner of the fifth aspect, in a ninth possible implementation manner of the fifth aspect, the processor is configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz The number of pilots and/or the long training sequence is determined to be 6 or 8, and the distribution of the pilot and/or the long training sequence is determined.

With reference to the fifth aspect, in a tenth possible implementation manner of the fifth aspect, the processor is specifically configured to: according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource is preset The pilot pattern corresponding information selects the number of matched pilots and/or the long training sequence, and determines the distribution of the pilot and/or the long training sequence.

With reference to the fifth aspect, any one of the first to the tenth aspects of the fifth aspect, in the eleventh possible implementation manner of the fifth aspect, the processor is specifically used according to the Deriving the number of pilots and/or the number and distribution of the long training sequences, and calculating a value of the pilot and/or the long training sequence by using a preset pilot function; according to the pilot and/or the length The distribution of the training sequence encapsulates the values of the pilot and/or the long training sequence in the data field of the data packet.

With reference to the fifth aspect, any one of the first to the eleventh possible implementation manners of the fifth aspect, in the twelfth possible implementation manner of the fifth aspect, the data packet includes a pilot mode indication Information, the pilot mode indication information is used to cause the receiving device to determine the pilot mode of the data packet.

With reference to the fifth aspect, any one of the first to the twelfth possible implementation manners of the fifth aspect, in the thirteenth possible implementation manner of the fifth aspect, when there are two or more of the receiving devices The processor is further configured to determine, according to channel conditions and/or time-frequency resources allocated for information transmission, a unified pilot mode, where the unified pilot mode is corresponding to the two or more receiving devices The pilot and/or the number and distribution of the pilot and/or the long training sequence of the receiving device having the largest number of long training sequences; generating the pilot according to the unified pilot pattern Information, and the pilot information and the data to be sent are encapsulated in a data packet; the transmitter is further configured to send the data packet to a corresponding receiving device, so that the corresponding receiving device is configured according to the The pilot information is phase tracked and/or channel estimated.

In a sixth aspect, an embodiment of the present invention provides a receiving device, including:

a receiver, configured to receive a data packet sent by the sending device, where the data packet includes a pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, where the pilot mode includes The number and distribution of the pilots and/or the long training sequences;

And a processor, configured to acquire the pilot information from the data packet according to the pilot mode, perform phase tracking according to the pilot, and/or perform channel estimation according to the long training sequence.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the method further includes: a transmitter;

The receiver is further configured to receive a data packet that is sent by the sending device and encapsulates initial pilot information, where the transmitter is configured to send feedback information to the sending device according to a receiving result of the data packet, where So that the transmitting device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.

With reference to the sixth aspect, in a second possible implementation manner of the sixth aspect, the method further includes: a transmitter;

The receiver is further configured to receive a pilot mode acquisition request sent by the sending device, where the processor is further configured to acquire a channel condition according to the pilot mode acquisition request, and according to the channel condition and/or Determining a required pilot pattern for the time-frequency resource allocated to the information transmission; the transmitter, configured to send the required pilot pattern to the sending device, so that the sending device according to the required pilot The mode determines the pilot pattern.

With reference to the second possible implementation manner of the sixth aspect, in a third possible implementation manner of the sixth aspect, the processor is configured to determine, when the channel condition meets a first preset condition, The required pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel signal to noise ratio changes from high to low, and the added pilot mode Including increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting the matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel conditions. And determining a distribution of the pilot and/or the long training sequence; when the channel condition satisfies a second preset condition, determining that the required pilot mode is a decreasing pilot mode, The second preset condition includes that the frequency of change of the channel is less than the second preset change frequency, or the signal to noise ratio of the channel is changed from low to high, and the reducing the pilot mode comprises decreasing the pilot and/or the one by one according to the channel condition. The long training And the number of the trained sequences and/or the number of the long training sequences are selected from the plurality of sets of preset numbers according to the channel condition, and determining the pilot and/or the long training sequence distributed.

With reference to the second possible implementation manner of the sixth aspect, in a fourth possible implementation manner of the sixth aspect, the processor is specifically configured to perform, according to a predetermined modulation and coding scheme MCS that performs the information transmission, Selecting the matched pilot and/or the number of the long training sequences from the preset pilot mode correspondence information, and determining the distribution of the pilot and/or the long training sequence.

With reference to the second possible implementation manner of the sixth aspect, in a fifth possible implementation manner of the sixth aspect, the processor is configured to determine the quantity of the pilot according to a Doppler frequency shift of a channel. And determining the distribution of the pilots.

With reference to the second possible implementation manner of the sixth aspect, in a sixth possible implementation manner of the sixth aspect, the processor is specifically configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, according to the The bandwidth of the time-frequency resource determines the number and distribution of the pilots and/or the long training sequences required.

With reference to the sixth possible implementation manner of the sixth aspect, in a seventh possible implementation manner of the sixth aspect, the processor is configured to determine, when the bandwidth of the time-frequency resource is less than 5 MHz, The number of pilots and/or the long training sequences is two or four and the distribution of the pilots and/or the long training sequences is determined.

With reference to the sixth possible implementation manner of the sixth aspect, in an eighth possible implementation manner of the sixth aspect, the processor is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz Determining the number of said pilots and/or said long training sequences required is four, or six, or eight, and determining the distribution of said pilots and/or said long training sequences.

With reference to the sixth possible implementation manner of the sixth aspect, in a ninth possible implementation manner of the sixth aspect, the processor is configured to determine, when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, The number of said pilots and/or said long training sequences is six or eight and the distribution of said pilots and/or said long training sequences is determined.

With reference to the second possible implementation manner of the sixth aspect, in a tenth possible implementation manner of the sixth aspect, the processor is specifically configured to perform MCS according to the predetermined information transmission, and the foregoing The bandwidth of the time-frequency resource selects the matched pilot and/or the number of the long training sequences from the preset pilot mode correspondence information, and determines the distribution of the pilot and/or the long training sequence.

With reference to the sixth aspect, any one of the first to the tenth possible implementation manners of the sixth aspect, in the eleventh possible implementation manner of the sixth aspect, the processor is further used for The pilot mode indication information is obtained in the data packet, and the pilot mode is acquired according to the pilot mode indication information.

With reference to the sixth aspect, the possible implementation manner of any one of the first to the eleventh aspects, in the twelfth possible implementation manner of the sixth aspect, the processor is specifically used according to And the number and distribution of the pilot and/or the long training sequence, the values of the pilot and/or the long training sequence are obtained from the data packet.

According to a seventh aspect, an embodiment of the present invention provides a wireless system, including: a transmitting apparatus and a receiving apparatus, where the transmitting apparatus adopts the third aspect, and the first to the thirteenth aspects of the third aspect may The transmitting device according to the fourth aspect, the receiving device according to any one of the first to twelfth aspects of the fourth aspect.

According to an eighth aspect, an embodiment of the present invention provides a wireless system, including: a sending device and a receiving device, where the sending device adopts any of the first to the thirteenth aspects of the fifth aspect and the fifth aspect The transmitting device of the sixth aspect, the receiving device according to any one of the first to twelfth aspects of the sixth aspect.

The information transmission method, device and system according to the embodiment of the present invention realize the pilot mode based on the channel condition and/or the time-frequency resource allocated to the information transmission, and realize the pilot mode based on the channel change and/or the change of the time-frequency resource. Adapt to the adjustment, solve the problem of large or insufficient pilot overhead, reduce the packet error rate, and improve the communication quality.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, a brief description of the drawings used in the embodiments or the prior art description will be briefly described below. Obviously, the drawings in the following description It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural diagram of an embodiment of a wireless system according to the present invention;

2 is a flow chart of an embodiment of an information transmission method according to the present invention;

3 is a flow chart of another embodiment of an information transmission method according to the present invention;

4 is a schematic diagram of a pilot mode;

Figure 5 is a schematic diagram of another pilot mode;

Figure 6 is a schematic diagram of a third pilot mode;

7 is a schematic diagram of a fourth pilot mode;

Figure 8 is a schematic diagram of a pattern of complete RBs with pilot information;

9 is another schematic diagram of a complete RB with pilot information;

FIG. 10 is a schematic structural diagram of an embodiment of a transmitting apparatus according to the present invention; FIG.

11 is a schematic structural diagram of an embodiment of a receiving apparatus according to the present invention;

FIG. 12 is a schematic structural diagram of another embodiment of a receiving apparatus according to the present invention; FIG.

FIG. 13 is a schematic structural diagram of an embodiment of a transmitting device according to the present invention; FIG.

14 is a schematic structural diagram of another embodiment of a transmitting device according to the present invention;

15 is a schematic structural diagram of an embodiment of a receiving device according to the present invention;

16 is a schematic structural diagram of another embodiment of a receiving device according to the present invention;

17 is a schematic structural diagram of another embodiment of a wireless system according to the present invention;

FIG. 18 is a schematic structural diagram of still another embodiment of a wireless system according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

1 is a schematic structural diagram of an embodiment of a wireless system according to the present invention. The information transmission method of the present invention can be applied to a next-generation Wi-Fi system, such as the high-efficiency wireless local area network (IEEE) in the IEEE 802.11ax standard shown in FIG. Wireless Local Area Networks (referred to as HEW) system 10, which may include AP 11 and STA 12 conforming to the HEW standard, and may also include a conventional STA 13 conforming to the IEEE 802.11ac standard. The AP and the STA can be used as the transceiver device in the present invention. The sending device in the following embodiments may be the AP 11 or the STA 12, and the receiving device may be the STA 12 or the AP 11. Further, the wireless system of the present invention may also be a cellular network, and the transmitting device and the receiving device are a base station and a user equipment.

2 is a flowchart of an embodiment of an information transmission method according to the present invention. As shown in FIG. 2, the method in this embodiment may include:

Step 101: Determine, according to channel conditions and/or a time-frequency resource allocated to information transmission, a pilot mode for performing information transmission, where the pilot mode includes a quantity and a distribution of pilot and/or long training sequences;

The execution body of this embodiment is the above-mentioned transmitting device. The transmitting device determines a pilot mode for performing information transmission according to channel conditions and/or time-frequency resources allocated for information transmission, that is, according to the receiving device The present invention is directed to the quality of the communication environment between the transmitting device, or based on the size of the time-frequency resource that has been allocated to the current information transmission, or a combination of the two, to determine a pilot pattern that matches the communication environment. The pilot pattern includes the number and distribution of pilot and/or long training sequences, wherein the pilot can be used to indicate that the receiving device performs phase tracking, and the long training sequence can be used to indicate that the receiving device performs channel estimation, which is far away from the transmitting device. The receiving device has relatively poor channel conditions, and can determine more pilots and/or long training sequences for the receiving device to accurately phase track or channel estimate, and for receiving closer to the transmitting device. The device has relatively good channel conditions, and can determine fewer pilots and/or long training sequences for it, so as not to cause excessive overhead of the pilot or long training sequence.

Step 102: Generate pilot information according to the pilot mode, and encapsulate the pilot information and the to-be-sent data in a data packet, where the pilot information includes the pilot and/or the long training sequence. value;

After determining the pilot mode, the transmitting device generates a corresponding number of pilot and/or long training sequences according to the number of pilots and/or long training sequences, and pilots according to the distribution of pilot and/or long training sequences. And/or the value of the long training sequence is placed at the corresponding position. From the perspective of time domain, the data part of the data packet does not have a long training sequence in the prior art. When a receiving device is in outdoor communication with the transmitting device, its channel changes rapidly, and the data part has no long training sequence. The continuous refresh of the channel estimation cannot improve the packet error rate and seriously affect the quality of the communication. The present invention solves the above problem by determining the number and distribution of long training sequences according to channel conditions, and also deploying a long training sequence in the data portion of the data packet; from the perspective of the frequency domain, the pilot in the prior art is a fixed number. The fixed distribution, then the receiving device with poor channel condition can not accurately perform phase tracking because the number of pilots is small, and the receiving device with good channel condition will cause excessive pilot overhead because it does not need so many pilots. The present invention solves the above problems by determining the number and distribution of pilots according to channel conditions.

Step 103: Send the data packet to a receiving device, so that the receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.

The transmitting device sends the encapsulated data packet to the receiving device, and the receiving device performs phase tracking according to the pilot in the data packet and/or performs channel estimation according to the long training sequence. Since the pilot mode of the present invention has considered the channel condition, Therefore, the effects of phase tracking and/or channel estimation are more accurate.

In this embodiment, the pilot mode is determined according to the channel condition and/or the time-frequency resource allocated to the information transmission, and the adaptive adjustment of the pilot mode based on the channel change and/or the change of the time-frequency resource is implemented, and the pilot overhead is solved. Or insufficient use, reduce the packet error rate and improve communication quality.

FIG. 3 is a flowchart of another embodiment of an information transmission method according to the present invention. As shown in FIG. 3, the method in this embodiment may include:

Step 201: Receive a data packet sent by a sending device, where the data packet includes a pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, where the pilot pattern includes the The number and distribution of pilots and/or said long training sequences;

The execution body of this embodiment is the above-mentioned receiving device. After receiving the data packet sent by the sending device, the receiving device includes the pilot mode and the pilot information, and the receiving device acquires the pilot mode, that is, the number and distribution of the pilot and/or the long training sequence, from the data packet.

Step 202: Acquire the pilot information from the data packet according to the pilot mode, perform phase tracking according to the pilot, and/or perform channel estimation according to the long training sequence.

The receiving device can obtain the pilot information according to the pilot mode, and can perform phase tracking according to the pilot and/or perform channel estimation according to the long training sequence. The embodiment shown in this embodiment and the embodiment shown in FIG. 2 are respectively a method flow when the receiving device and the transmitting device are used as the execution subject, and the processes of the two correspond to each other. The transmitting device determines that the pilot mode can be used to indicate the information by using the pilot information. The information is notified to the receiving device, and the receiving device can acquire the values of the pilot and/or the long training sequence according to the number and distribution of the pilot and/or the long training sequence, and then perform phase tracking according to the pilot, and perform channel according to the long training sequence. estimate.

In this embodiment, by acquiring a pilot pattern determined according to channel conditions and/or a time-frequency resource allocated for information transmission, and acquiring pilot information at a corresponding position, accurate phase tracking and/or channel estimation is implemented, and the solution is implemented. The problem of large or insufficient frequency overhead reduces the packet error rate and improves the communication quality.

Further, before the step 201 of the foregoing method, the method may further include: receiving, by the receiving device, a data packet that is sent by the sending device and encapsulating initial pilot information; and sending feedback information to the sending device according to the receiving result of the data packet. And causing the transmitting device to acquire a channel condition according to the feedback information, and determining the pilot mode according to the channel condition.

In the initial stage, that is, during the first few frames of data packet transmission, the transmitting device does not know the channel environment in which the receiving device is located, and thus cannot obtain the channel condition, so the transmitting device adopts the advance The set initial pilot pattern produces initial pilot information. The receiving device feeds back the reception condition for the initial data packet, for example, an acknowledgement (Acknowledgement, ACK) or a negative acknowledgement (NACK), and the transmitting device determines the channel condition according to the number of ACKs and/or NACKs.

Further, before the foregoing method step 201, the method may further include: receiving, by the receiving device, a pilot mode acquisition request sent by the sending device; acquiring a channel condition according to the pilot mode acquiring request, and according to the channel condition and/or Determining a required pilot pattern for the time-frequency resource allocated to the information transmission; transmitting the required pilot pattern to the transmitting device, so that the transmitting device determines the pilot pattern according to the required pilot pattern .

The receiving device may also determine the required pilot mode according to the request of the sending device, and then directly send the pilot mode to the sending device.

The technical solutions of the method embodiments shown in FIG. 1 and FIG. 2 are described in detail below by using several specific embodiments.

In step 101 of the foregoing method embodiment, the transmitting device determines a pilot mode for performing information transmission according to channel conditions and/or time-frequency resources allocated for information transmission, and includes three implementation methods:

First, a pilot pattern for performing information transmission is determined according to channel conditions.

Further, the sending device generates initial pilot information by using a preset initial pilot mode, and sends the data packet encapsulated with the initial pilot information to the receiving device, and the receiving device sends the data packet according to the result of receiving the data packet. The feedback information is obtained according to the feedback information, and the number and distribution of the pilot and/or the long training sequence are determined according to the channel condition.

Preferably, the data packet includes pilot mode indication information, and the pilot mode indication information is used to enable the receiving device to determine the pilot mode of the data packet.

In this embodiment, in the initial stage, that is, during the first few frames of data packet transmission, the transmitting device does not know the channel environment in which the receiving device is located, and thus cannot obtain the channel condition, so the transmitting device adopts a preset initial guide. The frequency pattern produces initial pilot information. 4 is a schematic diagram of a pilot mode, FIG. 5 is a schematic diagram of another pilot mode, FIG. 6 is a schematic diagram of a third pilot mode, and FIG. 7 is a schematic diagram of a fourth pilot mode, as shown in FIG. As shown in FIG. 7, the number and distribution of pilot and/or long training sequences may have multiple modes, which are merely examples. Other pilot modes are also applicable to the present invention, and are not specifically limited herein. Predetermining a pilot pattern as the initial pilot mode The transmitting device places the values of the pilot and/or the long training sequence in corresponding positions according to the initial pilot mode, and packages and transmits the data together with the data to the receiving device. The data packet may further include a pilot mode indication information, and the sending device indicates, by using the pilot mode indication information, a pilot mode of the current data packet to the receiving device. After receiving the data packet, the receiving device can verify whether the data packet is correct by using the data packet check, and send feedback information reflecting the receiving result to the sending device, and the feedback information can be, for example, an ACK or a NACK. After receiving the feedback information sent by the receiving device, the sending device can determine the channel condition by, for example, counting the number of ACKs and/or NACKs.

Further, when the channel condition meets the first preset condition, the sending device determines that the pilot mode is an increased pilot mode, where the first preset condition includes that the channel change frequency is greater than the first preset change frequency. Or the signal-to-noise ratio of the channel is changed from high to low, and the increasing the pilot pattern includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or from multiple groups according to the channel condition Selecting the number of the matched pilots and/or the long training sequence, and determining the distribution of the pilot and/or the long training sequence; when the channel condition satisfies the second preset condition And the sending device determines that the pilot mode is to reduce a pilot mode, where the second preset condition includes that a frequency of change of the channel is less than a second preset change frequency, or that a signal to noise ratio of the channel changes from low to high, and the reduction The pilot mode includes decreasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting the matched pilots from a plurality of sets of preset numbers according to the channel conditions and/or the long The number of training sequences, and determining the frequency distribution of the guide and / or the length of the training sequence.

The first preset condition and the second preset condition are two measurement thresholds of the preset channel condition, for example, the receiving device is in a moving state, or the channel environment of the receiving device is changing, and the channel condition is always changing. When this change reaches the threshold, it needs to adjust its pilot mode. If the frequency of the channel condition changes too much, or the signal-to-noise ratio of the channel is high or low, indicating that the channel condition is getting worse, it is necessary to increase the number of pilots and/or long training sequences, and the manner of increase may be one by one. If the number is increased, the number of matches may be selected from a preset number of groups. After the number is determined, the pilot and/or long training sequence may be deployed in a uniformly distributed manner, or may be deployed in a fixed interval manner. Pilot and/or long training sequence.

For example, when the channel environment in which the receiving device is located is good, the transmitting device may only select to place pilot information on one symbol, but not to place pilots in other symbols, such as shown in FIG. When the receiving device is in a bad channel environment, the transmitting device can place pilot signals on all symbols. Information, such as shown in Figure 5. When the channel environment in which the receiving device is located is poor, the transmitting device can place pilot information on one of every two symbols, as shown in FIG. When the channel environment in which the receiving device is located is good, the transmitting device can place pilot information on one of every three symbols, as shown in FIG. The pilot mode shown in FIG. 4 to FIG. 7 may be a distribution example of pilot information in a Resource Block (abbreviation: RB) or a Resource Unit (RU), and an RB containing pilot information may also be used. It is deployed in a wireless time-frequency resource according to a certain pattern. For example, FIG. 8 is a schematic diagram of a complete RB with pilot information, and FIG. 9 is another schematic diagram of a complete RB with pilot information.

Further, the transmitting device selects the matched pilot and/or the selected pilot mode corresponding information according to a predetermined Modulation and Coding Scheme (MCS) for performing the information transmission. Describe the number of long training sequences and determine the distribution of the pilots and/or the long training sequences.

In the 20 MHz bandwidth of the IEEE 802.11a, 11n, and 11ac standards, four subcarriers are fixed as pilot subcarriers among the 64 subcarriers, and are distributed at positions where the subcarrier numbers are -21, -7, 7, and 21. In this embodiment, the sending device determines the number of pilots and/or long training sequences according to the MCS, and the correspondence between the MCS and the number may be preset in the pilot mode corresponding information, and the pilot mode corresponding information may be in the form of a table. For example, Table 1 shows.

Table 1

MCS索引MCS index	导频和/或长训练序列的数量Number of pilot and/or long training sequences
MCS索引MCS index	导频和/或长训练序列的数量Number of pilot and/or long training sequences	00	22
1～21 to 2	22	00	22
1～21 to 2	22	3～43 to 4	44
5～75~7	44	3～43 to 4	44
5～75~7	44	8～98~9	66

After the transmitting device determines the number of pilots and/or long training sequences corresponding to the MCS according to Table 1, the distribution of these pilots and/or long training sequences can be determined as shown in FIGS. 4-7.

Further, the transmitting device determines the number of pilots according to the Doppler shift of the channel, and determines the distribution of the pilots.

Doppler shift is a measure of channel conditions and can be used as a basis for determining the number of pilots. The travel pilot distribution pattern in IEEE 802.11ah is fixed, with pilot information in each symbol. When the Doppler shift of the receiving device is large, each symbol carries a traveling pilot, as shown in Figure 5; when the Doppler shift of the receiving device is normal, one of every two symbols The symbol carries the traveling pilot, as shown in Figure 6. When the Doppler shift of the receiving device is small, one of every three symbols carries the traveling pilot, as shown in Figure 7.

Further, the transmitting device sends a pilot mode acquisition request to the receiving device, and receives a required pilot mode that is determined and sent by the receiving device according to the channel condition, and determines the pilot and/or according to the required pilot mode. Or the number and distribution of the long training sequences.

The transmitting device determines the pilot mode, and may also determine the required pilot mode by the receiving device by transmitting a pilot mode acquisition request to the receiving device, and then the transmitting device determines the pilot mode for performing information transmission according to the pilot mode required by the receiving device.

Second, the pilot mode for information transmission is determined according to the time-frequency resource allocated for information transmission.

Further, when the bandwidth of the time-frequency resource is less than 20 MHz, the sending device determines the quantity and distribution of the pilot and/or the long training sequence according to the bandwidth of the time-frequency resource.

The transmitting device determines the pilot mode only according to the time-frequency resource allocated to the current information transmission. For example, when the bandwidth of the time-frequency resource is less than 5 MHz, the transmitting device determines the number of the pilot and/or the long training sequence. 2 or 4 and determine the distribution of the pilot and/or the long training sequence. The transmitting device determines that the number of the pilots and/or the long training sequence is four, or six, or eight, Frequency and/or distribution of the long training sequence. When the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, the transmitting device determines that the number of the pilot and/or the long training sequence is six or eight, and determines the pilot and/or the long training. The distribution of the sequence.

It should be noted that, when the bandwidth of the time-frequency resource is less than 20 MHz, the foregoing process only enumerates the optimal embodiment. In fact, the number of pilots may also be an odd number, which is not limited in the present invention. For example, when the bandwidth of the time-frequency resource is less than 5 MHz, the number of the pilots is determined to be one or three; when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determining the pilot The number is 3, 5 or 7; when the time-frequency resource is greater than or equal to 10 MHz and less than 20 MHz, the number of pilots is determined to be 5, 7, or 9.

Third, the pilot mode for information transmission is determined according to channel conditions and time-frequency resources allocated for information transmission.

Further, the sending device selects, according to the predetermined MCS that performs the information transmission and the bandwidth of the time-frequency resource that is allocated to the receiving device in advance, from the preset pilot mode corresponding information. Matching the number of pilots and/or the long training sequence and determining the distribution of the pilot and/or the long training sequence.

The transmitting device considers the bandwidth of the time-frequency resource allocated to the current information transmission in addition to the MCS when determining the pilot mode. For example, when the bandwidth of the current frequency resource is less than or equal to 5 MHz, the correspondence between the number of pilot and/or long training sequences and the MCS is as shown in Table 2; when the bandwidth of the current frequency resource is between 5 MHz and 20 MHz, the pilot and/or The correspondence between the number of long training sequences and the MCS is shown in Table 3;

Table 2

MCS索引MCS index	导频和/或长训练序列的数量Number of pilot and/or long training sequences
MCS索引MCS index	导频和/或长训练序列的数量Number of pilot and/or long training sequences	00	11
1～21 to 2	11	00	11
1～21 to 2	11	3～43 to 4	22
5～75~7	22	3～43 to 4	22
5～75~7	22	8～98~9	44

table 3

In the step 102 of the foregoing method embodiment, the sending device generates the pilot information according to the pilot mode, and encapsulates the pilot information and the data to be sent in a data packet. The specific implementation method may be: Deriving the number of pilots and/or the number and distribution of the long training sequences, and calculating a value of the pilot and/or the long training sequence by using a preset pilot function; according to the pilot and/or the length The distribution of the training sequence encapsulates the values of the pilot and/or the long training sequence in the data field of the data packet.

When the transmitting device calculates the values of the acquired pilot and/or long training sequence, the preset pilot function used may be the number of pilot and/or long training sequences specified in the IEEE 802.11a, 11n, 11ac standards. Based on the distribution, multiply it by {1, -1, j or -j} to construct a larger number of pilots and/or long training sequences; the preset pilot function can also be based on pilots and / Or a symbol index of a long training sequence and a function of a subcarrier index, such as (-1)^ (subcarrier index + symbol index). The preset pilot function for calculating the value of the pilot and/or long training sequence can also be other functional forms, which are not done here. Specifically limited.

The transmitting device may be configured with reference to the pilot mode shown in FIG. 4 to FIG. 7 when the value of the pilot and/or the long training sequence is distributed, and may be deployed in other pilot modes, which is not specifically limited herein.

Further, when there are more than two receiving devices, the process of all the foregoing method embodiments may further include: determining, by the sending device, a unified pilot mode according to channel conditions and/or time-frequency resources allocated for information transmission, The unified pilot mode is the pilot of the two or more receiving devices and/or the pilot device of the receiving device with the largest number of the long training sequences and/or the long training sequence a quantity and a distribution; the transmitting device generates the pilot information according to the unified pilot pattern, and encapsulates the pilot information and the to-be-sent data in a data packet; the sending device sends the data packet And corresponding to the receiving device, so that the corresponding receiving device performs phase tracking and/or channel estimation according to the pilot information.

Specifically, in the wireless system, there are multiple receiving devices that communicate with the same transmitting device at the same time. For each receiving device, the corresponding pilot mode may be determined according to the foregoing method embodiment. Since the channel environment or channel variation of each receiving device is different, the number and distribution of pilot and/or long training sequences determined by the above method are not completely the same, and the transmitting device selects the determined pilot. And the pilot mode of the receiving device with the largest number of and/or the long training sequence is a unified pilot mode, and the transmitting device calculates the value of the pilot and/or the long training sequence according to the unified pilot mode, and the pilot and/or Or long training sequences are deployed in the corresponding frequency domain and time domain locations. After receiving the data packet sent by the sending device, the receiving device can obtain the pilot information according to the pilot mode, and then perform phase tracking and/or channel estimation according to the pilot information.

Similarly, the receiving device can also determine the required pilot mode by using the above three methods, and details are not described herein again.

FIG. 10 is a schematic structural diagram of an embodiment of a transmitting apparatus according to the present invention. As shown in FIG. 10, the apparatus in this embodiment may include: a pilot determining module 11, a packaging module 12, and a sending module 13, wherein the pilot determining module 11 And determining, by the channel condition and/or the time-frequency resource allocated to the information transmission, a pilot mode for performing information transmission, where the pilot mode includes the number and distribution of pilot and/or long training sequences; and the encapsulating module 12, Generating pilot information according to the pilot pattern, and encapsulating the pilot information and the data to be transmitted in a data packet, where the pilot information includes values of the pilot and/or the long training sequence; The sending module 13 is configured to send the data packet to the receiving device, so that the receiving device performs phase tracking according to the pilot, and/or according to the long training sequence The column performs channel estimation.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and technical effects are similar, and details are not described herein again.

Further, the pilot determining module 11 is configured to generate initial pilot information by using a preset initial pilot mode, and send a data packet encapsulated with the initial pilot information to the receiving device; And receiving, by the receiving device, feedback information sent according to a result of receiving the data packet; acquiring the channel condition according to the feedback information, and determining the quantity and distribution of the pilot and/or the long training sequence according to the channel condition.

Further, the pilot determining module 11 is specifically configured to: when the channel condition meets a first preset condition, determine that the pilot mode is to increase a pilot mode, where the first preset condition includes a channel The frequency of change is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes increasing the number of the pilot and/or the long training sequence one by one according to the channel condition or Selecting the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition, and determining a distribution of the pilot and/or the long training sequence; When the channel condition satisfies the second preset condition, determining that the pilot mode is to reduce the pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel signal to noise ratio is determined by Low to high, the reducing pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a matching from a plurality of sets of preset numbers according to the channel condition Pilot / Or the number of long training sequences, and determining the pilot and / or distribution of the long training sequence.

Further, the pilot determining module 11 is specifically configured to select the matched pilot and/or the long training from the preset pilot mode correspondence information according to the predetermined MCS that performs the information transmission. The number of sequences and the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 11 is specifically configured to determine the number of pilots according to a Doppler shift of a channel, and determine a distribution of the pilot.

Further, the pilot determining module 11 is specifically configured to send a pilot mode acquisition request to the receiving device, and receive a required pilot mode that is determined by the receiving device according to a channel condition and sent according to the required guide. The frequency pattern determines the number and distribution of the pilots and/or the long training sequences.

Further, the pilot determining module 11 is specifically configured to: when the bandwidth of the time-frequency resource is smaller than At 20 MHz, the number and distribution of the pilots and/or the long training sequences are determined according to the bandwidth of the time-frequency resources.

Further, the pilot determining module 11 is configured to: when the bandwidth of the time-frequency resource is less than 5 MHz, determine that the number of the pilot and/or the long training sequence is two or four, and determine The distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 11 is configured to determine that the number of the pilots and/or the long training sequence is four when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, or 6, or 8, and determine the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 11 is configured to determine, when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, the number of the pilots and/or the long training sequence is six or eight, and Determining the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 11 is configured to select, according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the matched pilot information from the preset pilot mode correspondence information. And/or the number of said long training sequences and determining the distribution of said pilots and/or said long training sequences.

Further, the encapsulating module 12 is specifically configured to calculate the pilot and/or the long training sequence by using a preset pilot function according to the number and distribution of the pilot and/or the long training sequence. a value of the pilot and/or the long training sequence is encapsulated in a data field of the data packet based on the pilot and/or the distribution of the long training sequence.

Further, the data packet includes pilot mode indication information, and the pilot mode indication information is used to enable the receiving device to determine the pilot mode of the data packet.

Further, when there are more than two receiving devices, the pilot determining module 11 is further configured to determine a unified pilot mode according to channel conditions and/or time-frequency resources allocated for information transmission, where the unified pilot mode The pilot mode is a sum of the pilots and/or the long training sequence of the receiving device and the number of the long training devices corresponding to the number of the pilots and/or the long training sequence of the two or more receiving devices The encapsulation module 12 is further configured to generate the pilot information according to the unified pilot mode, and encapsulate the pilot information and the to-be-sent data in a data packet; the sending module 13 further And for transmitting the data packet to a corresponding receiving device, so that the corresponding receiving device performs phase tracking and/or channel estimation according to the pilot information.

FIG. 11 is a schematic structural diagram of an embodiment of a receiving apparatus according to the present invention, as shown in FIG. The apparatus of the embodiment may include: a receiving module 21 and a processing module 22, wherein the receiving module 21 is configured to receive a data packet sent by the sending device, where the data packet includes a pilot mode and pilot information, and the pilot information Include a value of a pilot and/or a long training sequence, the pilot pattern including the number and distribution of the pilot and/or the long training sequence; a processing module 22 for using the pilot pattern from the The pilot information is obtained in a data packet, and phase tracking is performed according to the pilot, and/or channel estimation is performed according to the long training sequence.

The device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 12 is a schematic structural diagram of another embodiment of a receiving apparatus according to the present invention. As shown in FIG. 12, the apparatus of this embodiment is further configured to include: an initial interaction module 23 and a pilot determining module 24, wherein the initial interaction module 23 is configured to receive a data packet that is sent by the sending device and encapsulates initial pilot information, and send feedback information to the sending device according to the receiving result of the data packet, So that the transmitting device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition. a pilot determining module 24, configured to receive a pilot mode acquisition request sent by the sending device, acquire a channel condition according to the pilot mode acquisition request, and allocate a time-frequency resource to the information transmission according to the channel condition Determining a required pilot pattern; transmitting the required pilot pattern to the transmitting device to cause the transmitting device to determine the pilot pattern based on the required pilot pattern.

Further, the pilot determining module 24 is configured to: when the channel condition meets the first preset condition, determine that the required pilot mode is to increase a pilot mode, where the first preset condition includes The frequency of change of the channel is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes increasing the pilot and/or the long training sequence one by one according to the channel condition. Selecting the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition, and determining a distribution of the pilot and/or the long training sequence; When the channel condition meets the second preset condition, determining that the required pilot mode is to reduce the pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel The signal to noise ratio is changed from low to high, and the reducing the pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or from the channel condition The number of matched pilots and/or the number of long training sequences is selected from a set of preset numbers, and the distribution of the pilots and/or the long training sequences is determined.

Further, the pilot determining module 24 is specifically configured to select the matched pilot and/or the long training from the preset pilot mode correspondence information according to the predetermined MCS that performs the information transmission. The number of sequences and the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 24 is specifically configured to determine the number of the pilots according to a Doppler shift of the channel, and determine a distribution of the pilots.

Further, the pilot determining module 24 is configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the required pilot and/or the long training sequence according to the bandwidth of the time-frequency resource. Quantity and distribution.

Further, the pilot determining module 24 is specifically configured to: when the bandwidth of the time-frequency resource is less than 5 MHz, determine that the required pilot and/or the number of the long training sequence is two or four, And determining the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 24 is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determine that the required pilot and/or the number of the long training sequence is four. , or 6, or 8, and determine the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 24 is configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determine that the required pilot and/or the number of the long training sequence is six or eight. And determining the distribution of the pilot and/or the long training sequence.

Further, the pilot determining module 24 is configured to select, according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the matched pilot information from the preset pilot mode correspondence information. And/or the number of said long training sequences and determining the distribution of said pilots and/or said long training sequences.

Further, the receiving module 21 is further configured to obtain pilot mode indication information from the data packet, and acquire the pilot mode according to the pilot mode indication information.

Further, the processing module 22 is specifically configured to acquire the pilot and/or the long training sequence from the data packet according to the number and distribution of the pilot and/or the long training sequence. value.

FIG. 13 is a schematic structural diagram of an embodiment of a transmitting device according to the present invention, as shown in FIG. The apparatus of the embodiment may include: a processor 31 and a transmitter 32, wherein the processor 31 is configured to determine a pilot mode for performing information transmission according to channel conditions and/or time-frequency resources allocated for information transmission, the pilot The mode includes a quantity and a distribution of pilot and/or long training sequences; generating pilot information according to the pilot pattern, and encapsulating the pilot information and the data to be transmitted in a data packet, where the pilot information includes a pilot and/or a value of the long training sequence; a transmitter 32, configured to send the data packet to a receiving device, to enable the receiving device to perform phase tracking according to the pilot, and/or according to The long training sequence performs channel estimation.

FIG. 14 is a schematic structural diagram of another embodiment of a transmitting device according to the present invention. As shown in FIG. 14, the device in this embodiment may further include: a receiver 33, based on the device structure shown in FIG. The processor 31 is configured to generate initial pilot information by using a preset initial pilot mode, where the transmitter is further configured to send the data packet encapsulated with the initial pilot information to the receiving device; The receiver 33 is configured to receive feedback information that is sent by the receiving device according to a result of receiving the data packet, where the processor is configured to acquire the channel condition according to the feedback information, and according to the channel condition The number and distribution of the pilots and/or the long training sequences are determined.

Further, the processor 31 is specifically configured to: when the channel condition meets a first preset condition, determine that the pilot mode is to increase a pilot mode, where the first preset condition includes a channel change frequency. Greater than the first preset change frequency, or the signal-to-noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or according to the The channel condition selects the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers, and determines a distribution of the pilot and/or the long training sequence; when the channel condition When the second preset condition is met, the pilot mode is determined to be a reduced pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel signal to noise ratio is changed from low to low. High, the reducing the pilot mode comprises reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting the matched pilots from a plurality of sets of preset numbers according to the channel condition And/or Describe the number of long training sequences and determine the pilot and/or the long training The distribution of the sequence.

Further, the processor 31 is specifically configured to select, according to the predetermined MCS that performs the information transmission, the matched pilot and/or the long training sequence from the preset pilot mode correspondence information. And determining the distribution of the pilot and/or the long training sequence.

Further, the processor 31 is specifically configured to determine the number of the pilots according to a Doppler shift of the channel, and determine a distribution of the pilots.

Further, the transmitter 32 is further configured to send a pilot mode acquisition request to the receiving device, where the receiver 33 is configured to receive a required pilot mode that is determined and sent by the receiving device according to a channel condition. The processor 31 is further configured to determine the quantity and distribution of the pilot and/or the long training sequence according to the required pilot mode.

Further, the processor 31 is configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the quantity and distribution of the pilot and/or the long training sequence according to the bandwidth of the time-frequency resource.

Further, the processor 31 is configured to: when the bandwidth of the time-frequency resource is less than 5 MHz, determine that the number of the pilots and/or the long training sequence is two or four, and determine the The pilot and/or the distribution of the long training sequence.

Further, the processor 31 is configured to determine, when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, the number of the pilots and/or the long training sequence is four, or six , or 8, and determine the distribution of the pilot and/or the long training sequence.

Further, the processor 31 is configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determine that the number of the pilots and/or the long training sequence is six or eight, and determine The pilot and/or the distribution of the long training sequence.

Further, the processor 31 is specifically configured to select, according to a predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the matched pilot and the pilot information from the preset pilot mode corresponding information. / or the number of long training sequences and the distribution of the pilots and / or the long training sequences.

Further, the processor 31 is specifically configured to calculate the pilot and/or the long training sequence by using a preset pilot function according to the number and distribution of the pilot and/or the long training sequence. a value of the pilot and/or the long training sequence is encapsulated in a data field of the data packet based on the pilot and/or the distribution of the long training sequence.

Further, when there are more than two receiving devices, the processor 31 is further configured to determine a unified pilot mode according to channel conditions and/or time-frequency resources allocated for information transmission, the unified pilot The mode is the number and distribution of the pilots and/or the long training sequence of the receiving device and/or the receiving device with the largest number of the pilots and/or the long training sequence in the two or more receiving devices; Generating the pilot information according to the unified pilot mode, and encapsulating the pilot information and the data to be sent in a data packet; the transmitter 32 is further configured to send the data packet to a corresponding Receiving a device to cause the corresponding receiving device to perform phase tracking and/or channel estimation according to the pilot information.

FIG. 15 is a schematic structural diagram of an embodiment of a receiving device according to the present invention. As shown in FIG. 15, the device in this embodiment may include: a receiver 41 and a processor 42, where the receiver 41 is configured to receive the sending by the sending device. a data packet, the data packet including pilot patterns and pilot information, the pilot information including values of pilots and/or long training sequences, the pilot patterns including the pilots and/or the long a number and distribution of training sequences; a processor 42 configured to acquire the pilot information from the data packet according to the pilot pattern, perform phase tracking according to the pilot, and/or according to the length The training sequence performs channel estimation.

FIG. 16 is a schematic structural diagram of another embodiment of a receiving device according to the present invention. As shown in FIG. 16, the device in this embodiment may further include: a transmitter 43 on the basis of the device structure shown in FIG. The receiver 41 is further configured to receive a data packet that is sent by the sending device and encapsulates initial pilot information, where the transmitter 43 is configured to send a feedback to the sending device according to the receiving result of the data packet. And the information, so that the sending device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.

Further, the receiver 41 is further configured to receive a pilot mode acquisition request sent by the sending device, where the processor 42 is further configured to acquire a channel condition according to the pilot mode acquisition request, and according to the Channel conditions and/or time-frequency resources allocated for information transmission determine the required pilot mode The transmitter 43 is configured to send the required pilot mode to the sending device, so that the sending device determines the pilot mode according to the required pilot mode.

Further, the processor 42 is specifically configured to: when the channel condition meets a first preset condition, determine that the required pilot mode is to increase a pilot mode, where the first preset condition includes a channel The frequency of change is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes increasing the number of the pilot and/or the long training sequence one by one according to the channel condition or Selecting the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition, and determining a distribution of the pilot and/or the long training sequence; When the channel condition meets the second preset condition, determining that the required pilot mode is to reduce the pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel signal noise The decreasing pilot pattern includes decreasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a matching one of a plurality of sets of preset numbers according to the channel condition Place The pilot and / or the number of long training sequences, and determining the pilot and / or distribution of the long training sequence.

Further, the processor 42 is specifically configured to select, according to the predetermined MCS that performs the information transmission, the matched pilot and/or the long training sequence from the preset pilot mode correspondence information. And determining the distribution of the pilot and/or the long training sequence.

Further, the processor 42 is specifically configured to determine the number of the pilots according to a Doppler shift of the channel, and determine a distribution of the pilots.

Further, the processor 42 is specifically configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the required number of pilots and/or the long training sequence according to the bandwidth of the time-frequency resource. distributed.

Further, the processor 42 is specifically configured to: when the bandwidth of the time-frequency resource is less than 5 MHz, determine that the required pilot and/or the number of the long training sequence is two or four, and determine The distribution of the pilot and/or the long training sequence.

Further, the processor 42 is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determine that the required pilot and/or the number of the long training sequence is four, or 6, or 8, and determine the distribution of the pilot and/or the long training sequence.

Further, the processor 42 is specifically configured to: when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determine that the required pilot and/or the number of the long training sequence is six or eight, And determining the distribution of the pilot and/or the long training sequence.

Further, the processor 42 is specifically configured to select, according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the matched pilot and the preset pilot mode corresponding information. / or the number of long training sequences and the distribution of the pilots and / or the long training sequences.

Further, the processor 42 is further configured to acquire pilot mode indication information from the data packet, and acquire the pilot mode according to the pilot mode indication information.

Further, the processor 42 is specifically configured to acquire the pilot and/or the long training sequence from the data packet according to the number and distribution of the pilot and/or the long training sequence. value.

FIG. 17 is a schematic structural diagram of another embodiment of a wireless system according to the present invention. As shown in FIG. 17, the system of the present embodiment includes: a transmitting device 11 and a receiving device 12, wherein the transmitting device 11 can adopt the device embodiment of FIG. Correspondingly, the technical solution of the method embodiment shown in FIG. 2 can be performed correspondingly, and the implementation principle and the technical effect are similar, and details are not described herein again. The receiving device 12 can adopt the structure of the device embodiment of FIG. 11 or FIG. 12, and correspondingly, the technical solution of the method embodiment shown in FIG. 3 can be performed, and the implementation principle and technical effects are similar, and details are not described herein again.

FIG. 18 is a schematic structural diagram of still another embodiment of a wireless system according to the present invention. As shown in FIG. 18, the system of this embodiment includes: a transmitting device 21 and a receiving device 22, wherein the transmitting device 21 can adopt the device of FIG. 13 or FIG. Correspondingly, the technical solution of the method embodiment shown in FIG. 2 can be performed correspondingly, and the implementation principle and the technical effect are similar, and details are not described herein again. The receiving device 22 can adopt the structure of the device embodiment of FIG. 15 or FIG. 16 , and correspondingly, the technical solution of the method embodiment shown in FIG. 3 can be performed, and the implementation principle and technical effects are similar, and details are not described herein again.

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

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

In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of hardware plus software functional units.

The above-described integrated unit implemented in the form of a software functional unit can be stored in a computer readable storage medium. The above software functional unit is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor to perform the methods of the various embodiments of the present invention. Part of the steps. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like, which can store program codes. .

A person skilled in the art can clearly understand that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed, that is, the device is installed. The internal structure is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the device described above, refer to the corresponding process in the foregoing method embodiment, and details are not described herein again.

Finally, it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, and are not intended to be limiting; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that The technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or substitutions do not deviate from the technical solutions of the embodiments of the present invention. range.

Claims

An information transmission method, comprising:

Determining a pilot pattern for information transmission based on channel conditions and/or time-frequency resources allocated for information transmission, the pilot patterns including the number and distribution of pilot and/or long training sequences;

Generating pilot information according to the pilot pattern, and encapsulating the pilot information and the data to be transmitted in a data packet, where the pilot information includes values of the pilot and/or the long training sequence;

Transmitting the data packet to a receiving device to cause the receiving device to perform phase tracking according to the pilot, and/or performing channel estimation according to the long training sequence.
The method according to claim 1, wherein the determining a pilot pattern for performing information transmission according to a channel condition comprises:

Generating initial pilot information by using a preset initial pilot mode, and transmitting a data packet encapsulated with the initial pilot information to the receiving device;

Receiving feedback information sent by the receiving device according to a result of receiving the data packet;

Obtaining the channel condition according to the feedback information, and determining the quantity and distribution of the pilot and/or the long training sequence according to the channel condition.
The method according to claim 1, wherein the determining a pilot pattern for performing information transmission according to a channel condition comprises:

When the channel condition satisfies the first preset condition, determining that the pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel signal The noise ratio is changed from high to low, and the increasing the pilot mode includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a match from a plurality of sets of preset numbers according to the channel condition. The number of said pilots and/or said long training sequences, and determining the distribution of said pilots and/or said long training sequences;

When the channel condition satisfies the second preset condition, determining that the pilot mode is a reduced pilot mode, where the second preset condition includes that the channel change frequency is less than a second preset change frequency, or a channel signal The noise ratio is changed from low to high, and the reducing the pilot mode includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a matching from a plurality of sets of preset numbers according to the channel condition The number of pilots and/or the long training sequences and the distribution of the pilots and/or the long training sequences.
The method of claim 1 wherein said determining based on channel conditions Pilot patterns for information transmission, including:

And selecting, according to a predetermined modulation and coding scheme MCS that performs the information transmission, a quantity of the matched pilot and/or the long training sequence from the preset pilot mode correspondence information, and determining the pilot sum / or the distribution of the long training sequence.
The method according to claim 1, wherein the determining a pilot mode for performing channel transmission according to channel conditions comprises:

The number of pilots is determined based on the Doppler shift of the channel, and the distribution of the pilots is determined.
The method according to claim 1, wherein the determining a pilot pattern for performing information transmission according to a channel condition comprises:

Transmitting a pilot mode acquisition request to the receiving device;

Receiving, by the receiving device, a required pilot mode determined and transmitted according to channel conditions;

The number and distribution of the pilots and/or the long training sequences are determined based on the required pilot patterns.
The method according to claim 1, wherein the determining a pilot mode for performing information transmission according to a time-frequency resource allocated for information transmission comprises:

When the bandwidth of the time-frequency resource is less than 20 MHz, the number and distribution of the pilot and/or the long training sequence are determined according to the bandwidth of the time-frequency resource.
The method according to claim 7, wherein the determining the quantity and distribution of the pilot and/or the long training sequence according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is less than 5 MHz, determining that the number of the pilots and/or the long training sequence is two or four, and determining the distribution of the pilot and/or the long training sequence .
The method according to claim 7, wherein the determining the quantity and distribution of the pilot and/or the long training sequence according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determining that the number of pilots and/or the long training sequence is four, or six, or eight, and determining the pilot sum / or the distribution of the long training sequence.
The method according to claim 7, wherein the determining the quantity and distribution of the pilot and/or the long training sequence according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determining that the number of pilots and/or the long training sequence is six or eight, and determining the pilot and/or the long training sequence Minute cloth.
The method according to claim 1, wherein the determining a pilot mode for performing information transmission according to a channel condition and a time-frequency resource allocated for information transmission comprises:

And selecting, according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource, the number of matched pilots and/or the long training sequence from the preset pilot mode correspondence information, and determining The distribution of the pilot and/or the long training sequence.
The method according to any one of claims 1 to 11, wherein the generating pilot information according to the pilot pattern, and encapsulating the pilot information and data to be transmitted in a data packet, including :

Obtaining, by using a preset pilot function, a value of the pilot and/or the long training sequence according to the number and distribution of the pilot and/or the long training sequence;

The values of the pilot and/or the long training sequence are encapsulated in a data field of the data packet based on the pilot and/or the distribution of the long training sequence.
The method according to any one of claims 1 to 12, wherein the data packet includes pilot mode indication information, and the pilot mode indication information is used to cause the receiving device to determine the data packet. The pilot pattern.
The method according to any one of claims 1 to 13, wherein when there are more than two of the receiving devices, the method further comprises:

Determining a unified pilot pattern according to channel conditions and/or time-frequency resources allocated for information transmission, the unified pilot pattern being the corresponding pilot and/or the two of the two or more receiving devices The number and distribution of the pilots and/or the long training sequences of the receiving device having the largest number of long training sequences;

Generating the pilot information according to the unified pilot mode, and encapsulating the pilot information and the to-be-sent data in a data packet;

And transmitting the data packet to a corresponding receiving device, so that the corresponding receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.
An information transmission method, comprising:

Receiving a data packet sent by the sending device, where the data packet includes pilot mode and pilot information; the pilot information includes a value of a pilot and/or a long training sequence, where the pilot pattern includes the pilot sum / or the number and distribution of the long training sequences;

Obtaining the pilot information from the data packet according to the pilot pattern, performing phase tracking according to the pilot, and/or performing channel estimation according to the long training sequence.
The method according to claim 15, wherein before receiving the data packet sent by the sending device, the method further includes:

Receiving, by the sending device, a data packet encapsulated with initial pilot information;

And transmitting feedback information to the sending device according to the receiving result of the data packet, so that the sending device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.
The method according to claim 15, wherein before receiving the data packet sent by the sending device, the method further includes:

Receiving a pilot mode acquisition request sent by the sending device;

Obtaining a channel condition according to the pilot mode acquisition request, and determining a required pilot mode according to the channel condition and/or a time-frequency resource allocated to the information transmission;

Transmitting the required pilot pattern to the transmitting device to cause the transmitting device to determine the pilot pattern according to the required pilot pattern.
The method according to claim 17, wherein the determining the required pilot mode according to the channel condition comprises:

When the channel condition meets the first preset condition, determining that the required pilot mode is to increase a pilot mode, where the first preset condition includes that a channel change frequency is greater than a first preset change frequency, or a channel The signal-to-noise ratio is changed from high to low, and the increasing the pilot pattern includes increasing the number of the pilots and/or the long training sequence one by one according to the channel condition or from a plurality of preset numbers according to the channel condition. Selecting the matched pilot and/or the number of the long training sequences and determining the distribution of the pilot and/or the long training sequence;

When the channel condition satisfies the second preset condition, determining that the required pilot mode is to reduce the pilot mode, where the second preset condition includes that the channel change frequency is less than the second preset change frequency, or the channel The signal-to-noise ratio is changed from low to high, and the reducing the pilot pattern includes reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or from a plurality of sets of preset numbers according to the channel condition The number of matched pilots and/or the long training sequences is selected and the distribution of the pilots and/or the long training sequences is determined.
The method according to claim 17, wherein said according to said channel strip Determine the required pilot patterns, including:

And selecting, according to a predetermined modulation and coding scheme MCS that performs the information transmission, a quantity of the matched pilot and/or the long training sequence from the preset pilot mode correspondence information, and determining the pilot sum / or the distribution of the long training sequence.
The method according to claim 17, wherein the determining the required pilot mode according to the channel condition comprises:

The number of pilots is determined based on the Doppler shift of the channel, and the distribution of the pilots is determined.
The method according to claim 17, wherein the determining the required pilot mode according to the time-frequency resource allocated for information transmission comprises:

When the bandwidth of the time-frequency resource is less than 20 MHz, the required number of pilots and/or the length and distribution of the long training sequence are determined according to the bandwidth of the time-frequency resource.
The method according to claim 21, wherein the determining the number and distribution of the pilots and/or the long training sequences required according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is less than 5 MHz, determining that the number of the pilots and/or the long training sequence required is two or four, and determining the pilot and/or the long training sequence Distribution.
The method according to claim 21, wherein the determining the number and distribution of the pilots and/or the long training sequences required according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz, determining that the required pilot and/or the number of the long training sequence is four, or six, or eight, and determining the guide Frequency and/or distribution of the long training sequence.
The method according to claim 21, wherein the determining the number and distribution of the pilots and/or the long training sequences required according to the bandwidth of the time-frequency resource comprises:

When the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, determining that the number of the pilots and/or the long training sequence required is six or eight, and determining the pilot and/or the long training The distribution of the sequence.
The method according to claim 17, wherein the determining a required pilot mode according to the channel condition and a time-frequency resource allocated for information transmission comprises:

Selecting the matched pilot and/or the long training sequence from the preset pilot mode correspondence information according to the predetermined MCS that performs the information transmission, and the bandwidth of the time-frequency resource. And determining the distribution of the pilot and/or the long training sequence.
The method according to any one of claims 15 to 25, wherein after receiving the data packet sent by the transmitting device, the method further includes:

Obtaining pilot mode indication information from the data packet, and acquiring the pilot mode according to the pilot mode indication information.
The method according to any one of claims 15 to 26, wherein the obtaining the pilot information from the data packet according to the pilot mode comprises:

The values of the pilot and/or the long training sequence are obtained from the data packet based on the number and distribution of the pilots and/or the long training sequence.
A transmitting device, comprising:

a pilot determining module, configured to determine a pilot mode for performing information transmission according to channel conditions and/or time-frequency resources allocated to information transmission, where the pilot pattern includes a quantity and a distribution of pilot and/or long training sequences;

Encapsulating module, configured to generate pilot information according to the pilot mode, and encapsulate the pilot information and data to be sent in a data packet, where the pilot information includes the pilot and/or the long training The value of the sequence;

And a sending module, configured to send the data packet to the receiving device, so that the receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.
The apparatus according to claim 28, wherein the pilot determining module is configured to generate initial pilot information by using a preset initial pilot mode, and send a data packet encapsulated with the initial pilot information. And receiving, by the receiving device, feedback information sent according to a result of receiving the data packet; acquiring the channel condition according to the feedback information, and determining the pilot and/or the location according to the channel condition Describe the number and distribution of long training sequences.
The apparatus according to claim 28, wherein the pilot determining module is configured to: when the channel condition satisfies a first preset condition, determine the pilot mode to increase a pilot mode, where The first preset condition includes that the frequency of change of the channel is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode comprises increasing the pilot and/or according to the channel condition. Or the number of the long training sequences or the number of the matched pilots and/or the long training sequence selected from the plurality of sets of preset numbers according to the channel condition, and determining the pilot and/or the a distribution of long training sequences; when the channel condition satisfies a second predetermined condition, then Determining the pilot mode is to reduce a pilot mode, where the second preset condition includes that a channel change frequency is less than a second preset change frequency, or a channel signal to noise ratio changes from low to high, and the reduced pilot mode includes Reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or selecting a matching pilot and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition And determining the distribution of the pilot and/or the long training sequence.
The apparatus according to claim 28, wherein the pilot determining module is configured to select a match from preset preset pilot mode correspondence information according to a predetermined modulation and coding scheme MCS that performs the information transmission. The number of pilots and/or the long training sequences and the distribution of the pilots and/or the long training sequences.
The apparatus according to claim 28, wherein the pilot determining module is specifically configured to determine the number of pilots according to a Doppler shift of a channel, and determine a distribution of the pilot.
The apparatus according to claim 28, wherein the pilot determining module is specifically configured to send a pilot mode acquisition request to the receiving device, and receive a required guide that is determined and sent by the receiving device according to a channel condition. Frequency mode; determining the number and distribution of the pilots and/or the long training sequences based on the required pilot patterns.
The apparatus according to claim 28, wherein the pilot determining module is configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the pilot according to a bandwidth of the time-frequency resource and/or Or the number and distribution of the long training sequences.
The apparatus according to claim 34, wherein the pilot determining module is configured to determine the number of the pilots and/or the long training sequence when a bandwidth of the time-frequency resource is less than 5 MHz. 2 or 4 and determine the distribution of the pilot and/or the long training sequence.
The apparatus according to claim 34, wherein the pilot determining module is configured to determine the pilot and/or the length when a bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz. The number of training sequences is four, or six, or eight, and the distribution of the pilots and/or the long training sequences is determined.
The apparatus according to claim 34, wherein the pilot determining module is configured to determine the pilot and/or the long training sequence when a bandwidth of the time-frequency resource is greater than or equal to 10 MHz. The number is 6 or 8, and the distribution of the pilot and/or the long training sequence is determined.
The device according to claim 28, wherein the pilot determining module is configured to: according to a predetermined MCS that performs the information transmission, and a bandwidth of the time-frequency resource from a preset pilot mode Selecting the matched pilots and/or the number of the long training sequences in the correspondence information, and determining the distribution of the pilots and/or the long training sequences.
The device according to any one of claims 28 to 38, wherein the encapsulation module is configured to adopt a preset pilot according to the number and distribution of the pilot and/or the long training sequence. The function calculates a value of the pilot and/or the long training sequence; and encapsulates the value of the pilot and/or the long training sequence according to the distribution of the pilot and/or the long training sequence The data field of the data packet.
The apparatus according to any one of claims 28 to 39, wherein the data packet includes pilot mode indication information, and the pilot mode indication information is used to cause the receiving device to determine the data packet. The pilot pattern.
The apparatus according to any one of claims 28 to 40, wherein when there are more than two of the receiving devices, the pilot determining module is further configured to transmit information according to channel conditions and/or The time-frequency resource determines a unified pilot mode, where the unified pilot mode is the corresponding one of the two or more receiving devices and/or the receiving device with the largest number of the long training sequences The pilot and/or the number and distribution of the long training sequences; the encapsulating module is further configured to generate the pilot information according to the unified pilot mode, and send the pilot information and to be sent The data is encapsulated in a data packet; the sending module is further configured to send the data packet to a corresponding receiving device, so that the corresponding receiving device performs phase tracking and/or channel estimation according to the pilot information.
A receiving device, comprising:

a receiving module, configured to receive a data packet sent by the sending device, where the data packet includes a pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, where the pilot mode includes The number and distribution of the pilots and/or the long training sequences;

And a processing module, configured to acquire the pilot information from the data packet according to the pilot mode, perform phase tracking according to the pilot, and/or perform channel estimation according to the long training sequence.
The device according to claim 42, further comprising:

An initial interaction module, configured to receive, by the sending device, the number of initial pilot information encapsulated And transmitting, according to the reception result of the data packet, feedback information to the transmitting device, so that the transmitting device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.
The device according to claim 42, further comprising:

a pilot determining module, configured to receive a pilot mode acquisition request sent by the sending device, acquire a channel condition according to the pilot mode acquisition request, and determine according to the channel condition and/or a time-frequency resource allocated to information transmission a required pilot pattern; transmitting the required pilot pattern to the transmitting device to cause the transmitting device to determine the pilot pattern according to the required pilot pattern.
The apparatus according to claim 44, wherein the pilot determining module is configured to: when the channel condition satisfies a first preset condition, determine that the required pilot mode is to increase a pilot mode. The first preset condition includes that a frequency of change of the channel is greater than a first preset change frequency, or a signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode includes adding the pilot one by one according to the channel condition. And/or the number of long training sequences or the number of matching said pilots and/or said long training sequences from a plurality of sets of preset numbers according to said channel conditions, and determining said pilots and/or The distribution of the long training sequence; when the channel condition satisfies the second preset condition, determining that the required pilot mode is to reduce the pilot mode, and the second preset condition includes that the channel changes frequency is less than Two preset change frequencies, or the signal to noise ratio of the channel is changed from low to high, the reduced pilot mode including reducing the number of the pilots and/or the long training sequence one by one according to the channel conditions or according to the channel Member selected from a plurality of sets matches a preset number of the pilot and / or the number of long training sequences, and determining the pilot and / or distribution of the long training sequence.
The apparatus according to claim 44, wherein the pilot determining module is configured to select a match from preset preset pilot mode correspondence information according to a predetermined modulation and coding scheme MCS that performs the information transmission. The number of pilots and/or the long training sequences and the distribution of the pilots and/or the long training sequences.
The apparatus according to claim 44, wherein the pilot determining module is specifically configured to determine the number of pilots according to a Doppler shift of a channel, and determine a distribution of the pilot.
The apparatus according to claim 44, wherein the pilot determining module is configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the required pilot according to a bandwidth of the time-frequency resource. And/or the number and distribution of the long training sequences.
The apparatus according to claim 48, wherein the pilot determining module is configured to determine the required pilot and/or the long training sequence when a bandwidth of the time-frequency resource is less than 5 MHz. The number is 2 or 4 and the distribution of the pilot and/or the long training sequence is determined.
The apparatus according to claim 48, wherein the pilot determining module is configured to determine the required pilot and/or location when a bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz. The number of long training sequences is four, or six, or eight, and the distribution of the pilot and/or the long training sequence is determined.
The apparatus according to claim 48, wherein the pilot determining module is configured to determine the required pilot and/or the long training when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz. The number of sequences is six or eight and the distribution of the pilot and/or the long training sequence is determined.
The device according to claim 44, wherein the pilot determining module is configured to: according to a predetermined MCS that performs the information transmission, and a bandwidth of the time-frequency resource from a preset pilot mode Selecting the matched pilots and/or the number of the long training sequences in the correspondence information, and determining the distribution of the pilots and/or the long training sequences.
The apparatus according to any one of claims 42 to 52, wherein the receiving module is further configured to acquire pilot mode indication information from the data packet, and obtain information according to the pilot mode indication information. The pilot mode.
The apparatus according to any one of claims 42 to 53, wherein the processing module is specifically configured to use the data packet according to the number and distribution of the pilot and/or the long training sequence. The values of the pilot and/or the long training sequence are obtained.
A transmitting device, comprising:

a processor, configured to determine a pilot pattern for performing information transmission according to channel conditions and/or time-frequency resources allocated for information transmission, where the pilot pattern includes a quantity and a distribution of pilot and/or long training sequences; The pilot mode generates pilot information, and encapsulates the pilot information and the data to be transmitted in a data packet, where the pilot information includes values of the pilot and/or the long training sequence;

And a transmitter, configured to send the data packet to the receiving device, so that the receiving device performs phase tracking according to the pilot, and/or performs channel estimation according to the long training sequence.
The device according to claim 55, further comprising: a receiver;

The processor is configured to generate initial pilot information by using a preset initial pilot mode, where the transmitter is further configured to send a data packet encapsulated with the initial pilot information to the receiving device; a receiver, configured to receive feedback information that is sent by the receiving device according to a result of receiving the data packet, where the processor is configured to acquire the channel condition according to the feedback information, and determine, according to the channel condition, The number and distribution of pilots and/or the long training sequences are described.
The device according to claim 55, wherein the processor is configured to: when the channel condition satisfies a first preset condition, determine the pilot mode to increase a pilot mode, where the A preset condition includes that the frequency of change of the channel is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode comprises increasing the pilot and/or the one by one according to the channel condition. Determining the number of long training sequences or selecting the number of matched pilots and/or the long training sequence from a plurality of sets of preset numbers according to the channel condition, and determining the pilot and/or the long training a distribution of the sequence; when the channel condition satisfies a second preset condition, determining that the pilot mode is a pilot mode, wherein the second preset condition includes that a channel change frequency is less than a second preset change frequency, Or the signal to noise ratio of the channel is changed from low to high, and the reducing the pilot mode comprises reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or from multiple groups according to the channel condition. Quantity Select the pilot and / or the number of long training sequences, and determining the pilot and / or distribution of the long training sequence matches.
The device according to claim 55, wherein the processor is configured to select a matching scenario from the preset pilot mode correspondence information according to a predetermined modulation and coding scheme MCS that performs the information transmission. Deriving the number of pilots and/or the long training sequences and determining the distribution of the pilots and/or the long training sequences.
The device according to claim 55, wherein the processor is specifically configured to determine the number of pilots according to a Doppler shift of a channel, and determine a distribution of the pilots.
The device according to claim 55, further comprising a receiver;

The transmitter is further configured to send a pilot mode acquisition request to the receiving device, where the receiver is configured to receive a required pilot mode that is determined and sent by the receiving device according to a channel condition; the processor, Also used to determine the number and distribution of the pilots and/or the long training sequences based on the required pilot patterns.
The device according to claim 55, wherein the processor is configured to determine, according to a bandwidth of the time-frequency resource, when a bandwidth of the time-frequency resource is less than 20 MHz. The number and distribution of pilots and/or the long training sequences are described.
The device according to claim 61, wherein the processor is configured to determine that the number of the pilots and/or the long training sequence is 2 when a bandwidth of the time-frequency resource is less than 5 MHz. Or 4 and determine the distribution of the pilot and/or the long training sequence.
The device according to claim 61, wherein the processor is configured to determine the pilot and/or the long training sequence when a bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz. The number is 4, or 6, or 8, and the distribution of the pilot and/or the long training sequence is determined.
The device according to claim 61, wherein the processor is configured to determine, when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz, the number of the pilots and/or the long training sequence is 6 or 8 and determine the distribution of the pilot and/or the long training sequence.
The device according to claim 55, wherein the processor is configured to: according to a predetermined MCS that performs the information transmission, and a bandwidth of the time-frequency resource from a preset pilot mode corresponding information. Selecting the number of matched pilots and/or the long training sequence and determining the distribution of the pilot and/or the long training sequence.
The device according to any one of claims 55 to 65, wherein the processor is configured to adopt a preset pilot according to the number and distribution of the pilot and/or the long training sequence. The function calculates a value of the pilot and/or the long training sequence; and encapsulates the value of the pilot and/or the long training sequence according to the distribution of the pilot and/or the long training sequence The data field of the data packet.
The device according to any one of claims 55 to 66, wherein the data packet includes pilot mode indication information, and the pilot mode indication information is used to cause the receiving device to determine the data packet. The pilot pattern.
The device according to any one of claims 55 to 67, wherein when there are more than two of the receiving devices, the processor is further configured to allocate information to the channel according to channel conditions and/or The frequency resource determines a unified pilot mode, where the unified pilot mode is the one of the receiving device and the Pilot and/or number and distribution of said long training sequences; generating said pilot information according to said unified pilot pattern, and encapsulating said pilot information and data to be transmitted in a data packet; said transmitting The device is further configured to send the data packet to a corresponding receiving device, so that the corresponding connection The receiving device performs phase tracking and/or channel estimation based on the pilot information.
A receiving device, comprising:

a receiver, configured to receive a data packet sent by the sending device, where the data packet includes a pilot mode and pilot information, where the pilot information includes a value of a pilot and/or a long training sequence, where the pilot mode includes The number and distribution of the pilots and/or the long training sequences;

And a processor, configured to acquire the pilot information from the data packet according to the pilot mode, perform phase tracking according to the pilot, and/or perform channel estimation according to the long training sequence.
The device according to claim 69, further comprising: a transmitter;

The receiver is further configured to receive a data packet that is sent by the sending device and encapsulates initial pilot information, where the transmitter is configured to send feedback information to the sending device according to a receiving result of the data packet, where So that the transmitting device acquires a channel condition according to the feedback information, and determines the pilot mode according to the channel condition.
The device according to claim 69, further comprising: a transmitter;

The receiver is further configured to receive a pilot mode acquisition request sent by the sending device, where the processor is further configured to acquire a channel condition according to the pilot mode acquisition request, and according to the channel condition and/or Determining a required pilot pattern for the time-frequency resource allocated to the information transmission; the transmitter, configured to send the required pilot pattern to the sending device, so that the sending device according to the required pilot The mode determines the pilot pattern.
The device according to claim 71, wherein the processor is configured to: when the channel condition satisfies a first preset condition, determine that the required pilot mode is to increase a pilot mode, where The first preset condition includes that the frequency of change of the channel is greater than the first preset change frequency, or the signal to noise ratio of the channel is changed from high to low, and the increasing the pilot mode comprises increasing the pilot and/or according to the channel condition. Or the number of the long training sequences or the number of the matched pilots and/or the long training sequence selected from the plurality of sets of preset numbers according to the channel condition, and determining the pilot and/or the a distribution of the long training sequence; when the channel condition satisfies the second preset condition, determining that the required pilot mode is to reduce the pilot mode, and the second preset condition includes that the channel change frequency is less than the second pre- Setting a change frequency, or a signal-to-noise ratio of the channel from low to high, the reducing the pilot mode comprising reducing the number of the pilots and/or the long training sequence one by one according to the channel condition or according to the channel condition Selecting a predetermined number of groups match the pilot and / or the number of long training sequences, and determining the pilot and / or distribution of the long training sequence.
The device according to claim 71, wherein the processor is configured to select a matching scenario from the preset pilot mode corresponding information according to a predetermined modulation and coding scheme MCS that performs the information transmission. Deriving the number of pilots and/or the long training sequences and determining the distribution of the pilots and/or the long training sequences.
The device according to claim 71, wherein the processor is specifically configured to determine the number of pilots according to a Doppler shift of a channel, and determine a distribution of the pilots.
The device according to claim 71, wherein the processor is configured to: when the bandwidth of the time-frequency resource is less than 20 MHz, determine the required pilot and/or according to a bandwidth of the time-frequency resource. Or the number and distribution of the long training sequences.
The device according to claim 75, wherein the processor is configured to determine the required pilot and/or the number of the long training sequence when the bandwidth of the time-frequency resource is less than 5 MHz. 2 or 4 and determine the distribution of the pilot and/or the long training sequence.
The device according to claim 75, wherein the processor is configured to determine the required pilot and/or the length when the bandwidth of the time-frequency resource is greater than or equal to 5 MHz and less than 10 MHz. The number of training sequences is four, or six, or eight, and the distribution of the pilots and/or the long training sequences is determined.
The device according to claim 75, wherein the processor is configured to determine the required pilot and/or the long training sequence when the bandwidth of the time-frequency resource is greater than or equal to 10 MHz. The number is 6 or 8, and the distribution of the pilot and/or the long training sequence is determined.
The device according to claim 71, wherein the processor is configured to: according to a predetermined MCS that performs the information transmission, and a bandwidth of the time-frequency resource from a preset pilot mode corresponding information. Selecting the number of matched pilots and/or the long training sequence and determining the distribution of the pilot and/or the long training sequence.
The device according to any one of claims 69 to 79, wherein the processor is further configured to acquire pilot mode indication information from the data packet, and obtain information according to the pilot mode indication information. The pilot mode.
The device according to any one of claims 69 to 80, wherein the processor is specifically configured to use the data packet according to the number and distribution of the pilot and/or the long training sequence. The values of the pilot and/or the long training sequence are obtained.
A wireless system, comprising: a transmitting device and a receiving device, wherein the transmitting device employs the transmitting device according to any one of claims 28 to 41, wherein the receiving device employs the claims 42-54 A receiving device according to any of the preceding claims.
A wireless system, comprising: a transmitting device and a receiving device, wherein the transmitting device employs the transmitting device according to any one of claims 55 to 68, wherein the receiving device adopts the claims 69-81 A receiving device as claimed in any of the preceding claims.