WO2013071887A1

WO2013071887A1 - Method and apparatus for service data transmission and reception

Info

Publication number: WO2013071887A1
Application number: PCT/CN2012/084798
Authority: WO
Inventors: 陈小锋
Original assignee: 华为技术有限公司
Priority date: 2011-11-18
Filing date: 2012-11-19
Publication date: 2013-05-23
Also published as: CN103124209A; CN103124209B

Abstract

A method and apparatus for service data transmission and reception are provided in the embodiments of the present invention, which relates to the technical field of communication, and is invented to effectively guarantee the reception performance of service data when increasing cell coverage radius. The method for service data transmission comprises: determining the number of space data streams adopted to transmit the service data; according to the determined number of space data streams, transmitting the service data for multiple times in a radio frame, wherein a same data symbol of the service data is mapped to different space data streams for at least two times of transmission of the multiple times of transmission. The present invention can be used in IEEE802.11 series protocol wireless communication systems.

Description

Method and device for transmitting and receiving service data

The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for transmitting and receiving service data. Background technique

As is well known, in a wireless communication process, data transmitted between a transmitting end and a receiving end includes service data and control information, wherein the fundamental purpose of the communication is to transmit service data, and the main function of the control information is to assist the service data. transmission.

The existing wireless communication system using the IEEE ( Institute of Electrical and Electronics Engineers) 802.1 1 series protocol is mainly applicable to indoor coverage, and the cell coverage radius is small, which is about 100 to 200 meters. In order to meet the growing business needs, it is necessary to increase the cell coverage radius of the wireless communication system, for example, to achieve a radius of 1000 meters to support outdoor coverage.

However, on the one hand, in the existing wireless communication systems, most communication terminals are powered by batteries, and in order to avoid excessive battery power consumption, the transmission power is required to be small; on the other hand, from the viewpoints of interference and environmental radiation, The wireless communication process also does not allow too much transmission power. Thus, if the cell coverage radius is increased, even if the transmitting end encodes at the lowest code rate allowed, and the service data is transmitted at the maximum power, the signal power received by the receiving end may still be small, which may result in the service data receiving performance not being high. To the request, it affects the accurate receipt of business data. Therefore, how to effectively ensure the reception performance of service data while increasing the coverage radius of the cell is an urgent problem to be solved. Summary of the invention

A main object of the embodiments of the present invention is to provide a method and a device for transmitting and receiving service data, which can effectively ensure the reception performance of service data while increasing the coverage radius of the cell.

In order to achieve the above object, the embodiment of the present invention adopts the following technical solutions:

In one aspect, an embodiment of the present invention provides a method for transmitting service data, including: determining a number of spatial data streams used to send service data; And sending, according to the determined number of spatial data streams, the service data by using one radio frame multiple times, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different The spatial data stream.

In another aspect, an embodiment of the present invention provides a method for receiving service data, including: receiving service data, where the service data is sent multiple times through one radio frame, and is sent in at least two times of the multiple transmissions. The same data symbol of the service data is mapped to different spatial data streams;

Obtaining the number of spatial data streams used when the service data is sent and the number of times the service data is sent;

The received service data is demodulated and/or decoded according to the number of acquired spatial data streams and the number of transmissions.

In another aspect, an embodiment of the present invention provides a service data sending apparatus, including: a determining unit, configured to determine a number of spatial data streams used for transmitting service data; and a sending unit, configured to determine, according to the determining unit, The number of spatial data streams, the service data is transmitted multiple times through one radio frame, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different spatial data On the flow.

In a further aspect, the embodiment of the present invention provides a service data receiving apparatus, including: a receiving unit, configured to receive service data, where the service data is sent multiple times through one radio frame, and in the multiple sending In at least two transmissions, the same data symbol of the service data is mapped to a different spatial data stream;

An obtaining unit, configured to acquire a number of spatial data streams used when the service data is sent, and a number of times the service data is sent;

And a processing unit, configured to demodulate and/or decode the service data received by the receiving unit according to the number of spatial data streams and the number of transmissions acquired by the acquiring unit.

The method for transmitting service data, the receiving method, the sending device, and the receiving device provided by the embodiment of the present invention, on the one hand, when the sending device sends the service data, repeatedly sending the service data multiple times through one radio frame, so that the receiving device can effectively obtain the service data. Power gain; on the other hand, in the process of transmitting the service data multiple times by the transmitting device, the same data symbol of the service data is mapped to different spatial data streams in at least two transmissions, due to different spaces The channel quality corresponding to the data stream is different, and the service data is The same data symbol is mapped to different spatial data streams, avoiding the case where the same data symbol depends only on the channel quality of a spatial data stream, and the reception performance of the same data symbol depends on the channel of different spatial data streams. The quality can have an average effect, that is, for the same data symbol, the receiving device can effectively obtain the diversity gain. Therefore, while increasing the coverage radius of the cell, the reception performance of the service data can be effectively guaranteed even without changing the original transmission power. DRAWINGS

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings to be used in the embodiments will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the present invention. For ordinary technicians, other drawings can be obtained based on these drawings without paying for creative labor.

1 is a schematic structural diagram of a physical layer radio frame of an IEEE 802. i l system;

2 is a flowchart of a method for transmitting service data according to an embodiment of the present invention; FIG. 3 is a flowchart of a method for receiving service data according to an embodiment of the present invention; FIG. 4 is a device for transmitting service data according to an embodiment of the present invention; FIG. 5 is a structural block diagram of a device for receiving service data according to an embodiment of the present invention. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In the method for transmitting and receiving service data provided by the embodiment of the present invention, a plurality of spatial data streams are used to transmit service data. In order to enable a person skilled in the art to better understand the technical solution of the present invention, firstly, spatial data flow and adoption are adopted. A brief introduction to the data transmission process of spatial data streams.

The number of spatial data streams can be understood as the number of data that can be transmitted in parallel at the same time. For example, suppose there are T transmit antennas (or T transmit chains) at the transmitting end, and the number of spatial data streams is k. To transmit the k data through T transmit chains, you need to transform the k numbers first. In T numbers, the number of turns obtained after the transformation is sent out on each of the transmission chains. The process in which the number of k bars becomes a number is called precoding (Precodmg). Usually, the precoding process of changing k numbers into T numbers is as follows:

First, write the k numbers into a vector form:

K=trans { [x(0), x( 1 ), ... , x(k-1 )] } , where trans{ } represents the transition of the matrix or vector;

Then, multiply the matrix W of the T rows and k columns by K to get a vector containing T numbers: Y=trans { [y(0), y(l), · · · , y(T-l)] }=WK

Thus, the number of k is changed to T number. Usually, the matrix W is called a precoding matrix.

Let matrix W=[w(0), w(2), ..., w(k-1)] , where w ( i ) is a dimension vector or a column vector of length T. At this time, in terms of decomposition, Y = x (0) w (0) + x (l) w (l) + ... + x (k - l) w (k - l). Generally, in the description, the first column w(0) corresponding to the precoding matrix W is referred to as the first spatial data stream (layer 1), and the second column corresponding to the second column w(1) is referred to as the second space. Data stream (layer 2), and so on. Data x(0) is referred to as mapping to the first spatial data stream, data x(l) is referred to as mapping to the second spatial data stream, and so on.

Assume that there are R receiving antennas (receiving chains) at the receiving end, and the channel between the T transmitting chains of the transmitting end and the R receiving chains of the receiving end is H, where H is a matrix of R rows and T columns, and the i th column is the ith transmission. The channel fading coefficient of each of the R receiving chains, and the jth behavior is the channel fading coefficient of the T transmitting chains to the first receiving chain. The data sent by the transmitting end Y passes through the channel, and the receiving end R receives the vector of the received data.

Y ' = trans { [y ' (0), y ' (l) . , y ' (R-1)] }=HY=HWK= x(0)[Hw(0)]+x(l)[Hw (l)]+ ... +x(kl)[Hw(kl)]

Where y' (i) is the data received by the ith receiving antenna.

It should be noted that the precoding matrix W used at different times varies according to the channel condition, and the number k of spatial data streams may also vary. The transmitting end selects a suitable precoding matrix according to the channel condition to improve the data transmission performance.

The receiving end only needs to know that the transmitting end sends several layers of data, that is, the number of spatial data streams, and the matrix HW corresponding to the spatial data streams or the corresponding column vector [Hw(i)] when each spatial data stream is decomposed. The actual transmitted data x(0), ..., x(kl) can be demodulated and/or decoded. A wireless communication frame is briefly described by taking a communication system using the IEEE 802.11 series protocol as an example. In the communication system of the IEEE 802.11 series protocol, the physical layer radio frame can be roughly divided into a control part and a service data part. As shown in FIG. 1, the service data part mainly refers to the Data part in the figure, and the control part refers to the Data in the figure. A general term for all parts except. In the control section, the short training field X-STF (short training field), including the original L ( legacy ) -STF, high throughput HT (High Throughput) -STF, is mainly used to support time and frequency synchronization, and automatic gain Control AGC (Automatic Gain Control) adjustment; long training field X-LTF (long training field), including L-LTF, HT-LTF is mainly used to support channel estimation, of course, can further support synchronization; Control Signaling Field X -SIG (throughput Signal field), including L-SIG, HT-SIG) is mainly used to indicate information such as the amount of data in the data portion of the service, the modulation and coding scheme, and the transmission processing method to be used.

The number of spatial data streams transmitted by the transmitting end may be notified to the receiving end in the control part of the radio frame, for example, carried in the X-SIG, and the matrix H or HW may be combined with some of the notifications in the control part through channel estimation or channel estimation. Information to get. Based on the above description, the method for transmitting and connecting the service data provided by the embodiment of the present invention will be described in detail below.

As shown in FIG. 2, the method for transmitting service data provided by the embodiment of the present invention includes the following steps:

Step 11: Determine the number of spatial data streams used to send the service data.

Specifically, the transmitting end may determine the number of the spatial data streams according to the channel condition, and may determine the number of the spatial data streams according to a preset setting.

Step 12: Send the service data multiple times by using one radio frame according to the determined number of spatial data streams, and in the at least two transmissions of the multiple transmissions, the same data symbol of the service data Is mapped to different spatial data streams.

In this step, after the number of the spatial data streams is determined by the transmitting end, the service data is repeatedly sent by using one radio frame multiple times. For example, after the service data is copied multiple times, the data is transmitted through one radio frame, and the service is performed. The data is located in the data portion of the radio frame, that is, the Data portion, that is, the Data portion of the radio frame has a plurality of copies of the service data. The number of times of sending the service data is greater than or equal to two times, and the number of times may be set in advance, or may be determined by the transmitting end according to the channel condition, which is not limited by the present invention. In the embodiment of the present invention, the service data is sent multiple times through one radio frame, and in at least two transmissions in the multiple transmission, the same data symbol of the service data is mapped to different spatial data streams. . For example, the service data is sent by using a single carrier, and the number of times the service data is sent is twice. In the first transmission, a certain data symbol of the service data is mapped to the first spatial data stream. And in the second transmission, the data symbol is mapped onto the third spatial data stream.

The service data is sent by using a single carrier, and the number of times the service data is sent is three times. In the three transmissions, a certain data symbol of the service data is mapped to the first spatial data stream and the second space. On the data stream, the third spatial data stream, or, in the three transmissions, a certain data symbol of the service data is mapped to the first spatial data stream, the first spatial data stream, and the third spatial data. In the stream, that is, in two transmissions in three transmissions, the data symbols are mapped onto different spatial data streams.

In particular, it is assumed that the transmitting end sends k spatial data streams. Among the k spatial data streams, there are k1 spatial data streams that are sent to the receiving end 1, and another k-kl spatial data streams are sent. For the receiving end 2, then in the repeated transmission in step 12, the spatial data stream to which the data symbols of the service data of the same receiving end are mapped changes only in the spatial data stream corresponding to the receiving end, that is, the receiving end 1 The spatial data stream to which the data symbols of the service data are mapped is changed only in the k1 spatial data streams corresponding to the receiving end 1, and the spatial data stream to which the data symbols of the service data of the receiving end 2 are mapped is only corresponding to the receiving end 2. Changed in k-kl spatial data streams. For the case where the spatial data stream transmitted by the transmitting end is sent to two or more receiving ends, similarly, it will not be described here.

The method for transmitting service data provided by the embodiment of the present invention, on the one hand, when the transmitting end sends the service data, the service data is repeatedly sent through the radio frame multiple times. Therefore, the receiving end can jointly demodulate the service data sent multiple times. Therefore, the power gain of the service data can be effectively obtained. On the other hand, in the process of transmitting the service data multiple times, the transmitting end maps the same data symbol of the service data to different spatial data streams in at least two transmissions. In the above, since the channel quality corresponding to different spatial data streams is different, the same data symbol of the service data is mapped to different spatial data streams, thereby avoiding that the same data symbol only depends on a channel of a spatial data stream. In the case of quality, the reception performance of the same data symbol depends on the channel quality of different spatial data streams, and the probability that the spatial quality of different spatial data streams is poor is small, that is, the same data symbol is mapped to different The spatial data stream transmission enables the receiver to effectively obtain the diversity gain. Cause Therefore, while increasing the coverage radius of the cell, the reception performance of the service data can be effectively guaranteed even if the original transmission power is not changed. That is to say, the method for transmitting service data provided by the embodiment of the present invention can increase the coverage radius of the cell and effectively ensure the receiving performance of the service data.

It should be further noted that in existing communication systems, such as LTE, IEEE 802.11 n,

IEEE802. i ah, etc., all use OFDM modulation transmission. The OFDM system divides the entire System Bandwidth into multiple subcarriers (Subcarriers). The duration of one OFDM symbol is used as a basic unit in time. Generally, the duration of the OFDM symbol is inversely related to the interval between two adjacent subcarriers. Then, from the perspective of the OFDM system as a whole, the time is cut into blocks and cut into blocks in frequency. In terms of time, a block in time contains multiple subcarriers; in terms of frequency, blocks on one frequency are distributed over multiple OFDM symbols. In an OFDM system, each subcarrier can support multiple spatial data streams. Of course, since the channel corresponding to the transmit antenna to the receive antenna of each subcarrier is generally different, the maximum number of spatial data streams that each subcarrier can support may be different. In order to simplify the system, when multiple spatial data streams are used for data transmission, an equal number of spatial data streams are generally transmitted on all subcarriers currently used by the system, for example, the number of selected spatial data streams is all The minimum number of subcarriers that can be supported.

In the scenario where the service data is sent by using multiple subcarriers, the "the same data symbol of the service data is mapped to a different spatial data stream" described in step 12, the "different spatial data stream" includes:

Different spatial data streams of the same subcarrier, for example, the first spatial data stream of subcarrier a and the second spatial data stream of subcarrier a;

The same spatial data stream of different subcarriers, for example, the first spatial data stream of subcarrier a and the first spatial data stream of subcarrier b; or

Different spatial data streams of different subcarriers, for example, the first spatial data stream of subcarrier a and the second spatial data stream of subcarrier b.

Preferably, in a scenario in which the service data is sent by using multiple subcarriers, in step 12, in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different subcarriers. Same or different spatial data streams.

Taking the number of times the service data is sent as an example, a certain data symbol of the service data is mapped to the first spatial data stream of the subcarrier a of the OFDM symbol A when the first transmission is performed; At the time of secondary transmission, the number of subcarriers b mapped to OFDM symbol B On three spatial data streams, where a can be the same as b or different.

Specifically, the data symbols to be transmitted in a radio frame, when each subcarrier is transmitted by k data streams, the data symbols are divided into a group of k data symbols, and then each group is mapped to different children of the OFDM symbol. On the carrier, and mapping the same set of data symbols to k spatial data streams of the same subcarrier of the same OFDM symbol.

For example, in the first transmission, it is mapped to the subcarrier of one OFDM symbol in the order of [al, a-2, ..., af], and in the second transmission, it can be mapped in the order of a cyclic shift. Subcarriers of another OFDM symbol, for example, mapped to subcarriers of another OFDM symbol in the order of [am, a-{m+l } , af, a-1 , a-{ml }]; Send, and so on. Where a-i denotes a data symbol group containing k data.

It is advantageous to be mapped to different subcarriers when the same data symbol is repeatedly transmitted. The channels on different subcarriers are different. For each transmission of multiple transmissions of service data, the same data symbol or symbol group is placed on different subcarriers on the frequency, that is, after different channels are transmitted. Statistically speaking, the probability that different channels are very poor is reduced, and therefore, the receiving end can effectively obtain the frequency diversity gain. Further effectively guarantees the reception performance of business data.

Optionally, in an embodiment of the present invention, the method for sending the service data may further include:

Sending information indicating the number of spatial data streams used in the transmission of the service data and/or information indicating the number of times the service data is transmitted, so that the receiving end uses the service data according to the indication The information of the number of spatial data streams and/or the information indicating the number of times the service data is sent, obtains the number of spatial data streams used by the transmitting end to send the service data, and the number of times of transmission, so as to be used according to the sending of the service data to the transmitting end. The number of spatial data streams and the number of transmissions are obtained, and the actual transmitted data is obtained.

According to the foregoing, the radio frame includes a control part and a service data part, and the service data is located in the service data part of the radio frame. Therefore, optionally, the transmitting end may send the indication part by using a control part of the radio frame that sends the service data. The information indicating the number of spatial data streams used for transmitting the service data and/or the information indicating the number of times the service data is transmitted is information indicating the number of spatial data streams used when the service data is transmitted and/or Or the information indicating the number of times the service data is sent is carried in the control part of the radio frame, for example, for the IEEE 802.11 communication system, may be carried in the X-SIG of the radio frame, so that the receiving end receives and demodulates the control part. It is known that the business data is sent at the time of transmission. The number of spatial data streams used and/or the number of times the service data is sent.

It can be understood that, for the receiving end, the number of spatial data streams or the number of transmissions used by the transmitting end to transmit the service data may be preset, and at this time, the transmitting end is not required to notify the above information to the receiving end. The receiving end may obtain, according to a preset, the number of spatial data streams or the number of times of sending the data data used for sending the service data. Corresponding to the foregoing method for transmitting service data, the embodiment of the present invention further provides a method for receiving service data, as shown in FIG. 3, including the following steps:

Step 21: Receive service data, where the service data is sent multiple times through one radio frame, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different spatial data. On the flow.

Specifically, for a communication system using the OFDM access technology, when receiving the communication signal of the transmitting end, the receiving end usually receives all the signals, and then finds the physical resource location carrying the data on the entire time-frequency resource, and The data on it is demodulated and/or decoded to obtain its own information.

Optionally, in a scenario where the transmitting end uses multiple subcarriers to send service data, the different spatial data streams include:

Different spatial data streams of the same subcarrier, identical spatial data streams of different subcarriers or different spatial data streams of different subcarriers.

Step 22: Obtain a number of spatial data flows used when the service data is sent and a number of times the service data is sent.

The embodiment of the present invention does not limit how the number of spatial data streams used by the receiving end to obtain the service data and the number of times the service data is sent, and the receiving end may notify the transmitting end, for example, the indication information sent by the transmitting end. To obtain the above information, the above information may also be obtained according to a preset setting.

Step 23: Demodulate and/or decode the received service data according to the obtained number of spatial data streams and the number of transmissions.

For example, the scenario in which the transmitting end uses multiple subcarriers to send service data is used. Specifically, in this step, the receiving end determines different data according to the number of received spatial data streams and the number of transmissions according to the preset rules. Which spatial data stream on which subcarrier is the symbol on each transmission. Pre-set rules, for example, the first time to send a lieutenant [x0,xl, ... x_{kl }] are mapped to the 1st to kth spatial data streams in order, and [x_i,x_{i+l } , ....,x_ in the second transmission {kl } , xO, ... , x_{il }] are mapped to the first to kth spatial data streams in order. Thus, the receiving end can take out the same data symbol in each transmission in multiple transmissions for joint demodulation and/or decoding.

The method for receiving service data provided by the embodiment of the present invention, on the one hand, when the service data is sent by the transmitting end, the service data is repeatedly sent multiple times. Therefore, the receiving end can jointly demodulate the service data sent multiple times, thereby being effective. Obtaining the power gain of the service data; on the other hand, in the process of transmitting the service data multiple times, the transmitting end causes the same data symbol of the service data to be mapped to different spatial data streams in at least two transmissions, The channel quality corresponding to different spatial data streams is different, and the same data symbol of the service data is mapped to different spatial data streams, thereby avoiding the case where the same data symbol depends only on the channel quality of a spatial data stream. The receiving performance of the same data symbol depends on the channel quality of different spatial data streams, and the probability that the spatial quality of different spatial data streams is poor is small, that is, the same data symbol is mapped to different spatial data. On-stream transmission enables the receiver to effectively obtain diversity gain. Therefore, while increasing the coverage radius of the cell, the reception performance of the service data can be effectively ensured even without changing the original transmission power. The method for receiving service data provided by the embodiment of the present invention can increase the coverage radius of the cell and effectively ensure the receiving performance of the service data.

Further, in an embodiment of the present invention, the method for receiving the service data may further include:

Information indicating the number of spatial data streams used when the service data is transmitted and/or information indicating the number of times the service data is transmitted is received.

Optionally, the step may specifically be:

Receiving, by the control part of the radio frame transmitting the service data, information indicating the number of spatial data streams used when the service data is transmitted, and/or information indicating the number of times the service data is transmitted, for example, In the IEEE 802.11 communication system, the above information can be carried in the X-SIG of the radio frame.

In this way, in step 22, the receiving end can obtain the service according to the received information indicating the number of spatial data streams used when the service data is sent and/or the information indicating the number of times the service data is sent. The number of spatial data streams and/or the number of transmissions used when data is sent.

Optionally, the receiving end can receive the space used to indicate that the service data is sent. The information of the number of data streams is obtained in step 22, according to the received information indicating the number of spatial data streams used when the service data is sent, and the number of spatial data streams used when the service data is sent. And obtaining the number of times the service data is sent according to a preset.

The receiving end may further receive information indicating the number of times the service data is sent, in the step

And obtaining, according to the received information indicating the number of times of sending the service data, the number of times of sending the service data, and acquiring, according to a preset, the number of spatial data streams used when the service data is sent. .

Alternatively, the receiving end may further receive information indicating the number of spatial data streams used when the service data is sent and information indicating the number of times the service data is sent. In step 22, according to the received indication, The information of the number of spatial data streams used for transmitting the service data and the information indicating the number of times the service data is transmitted acquires the number of spatial data streams used for transmitting the service data and the number of times the service data is transmitted. Corresponding to the foregoing method for transmitting service data, the embodiment of the present invention further provides a device for transmitting service data, which is used as a transmitting end of service data, as shown in FIG. 4, and includes: a determining unit 100, configured to determine to send service data. The number of spatial data streams used; the sending unit 101, configured to send the service data multiple times through one radio frame according to the number of spatial data streams determined by the determining unit 100, and at least two of the multiple transmissions In the secondary transmission, the same data symbol of the service data is mapped to different spatial data streams.

The device for transmitting service data provided by the embodiment of the present invention, on the one hand, when the sending unit 101 sends the service data, the service data is repeatedly transmitted multiple times. Therefore, the receiving end can jointly demodulate the service data sent multiple times, so Obtaining the power gain of the service data; on the other hand, in the process of sending the service data multiple times, the sending unit 101 causes the same data symbol of the service data to be mapped to different spatial data streams in at least two transmissions, Since the channel quality corresponding to different spatial data streams is different, the same data symbol of the service data is mapped to different spatial data streams, which avoids that the same data symbol only depends on the channel quality of a spatial data stream. In the case, the reception performance of the same data symbol depends on the channel quality of different spatial data streams, and the probability that the spatial quality of different spatial data streams is poor is small, that is, the same data symbol is mapped to different spaces. The transmission on the data stream enables the receiver to effectively obtain the diversity gain. therefore, While increasing the coverage radius of the cell, the reception performance of the service data can be effectively guaranteed even if the original transmission power is not changed. That is to say, the device for transmitting service data provided by the embodiment of the present invention can increase the coverage radius of the cell and effectively ensure the receiving performance of the service data.

Optionally, in a scenario that the sending unit 101 sends the service data by using multiple subcarriers, the different spatial data streams include:

Further, in an embodiment of the present invention, the sending unit 101 is further configured to: send information indicating the number of spatial data streams used when the service data is sent, and/or indicate the number of times the service data is sent. information.

Specifically, the sending apparatus 101 is configured to send, by using a control part of the radio frame that sends the service data, information indicating the number of spatial data streams used when the service data is sent, and/or indicating the number of times the service data is sent. information. Corresponding to the foregoing method for receiving the service data, the embodiment of the present invention further provides a device for receiving service data, as a receiving end of the service data, as shown in FIG. 5, the method includes: a receiving unit 200, configured to receive service data, The service data is sent multiple times through one radio frame, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different spatial data streams;

The obtaining unit 201 is configured to acquire the number of spatial data streams used when the service data is sent and the number of times the service data is sent;

The processing unit 202 is configured to demodulate and/or decode the service data received by the receiving unit 200 according to the number of spatial data streams and the number of transmissions acquired by the obtaining unit 201.

Optionally, in a scenario where the service data transmitting end uses multiple subcarriers to send service data, the different spatial data streams include:

Further, in an embodiment of the present invention, the receiving unit 200 is further configured to: receive information indicating the number of spatial data streams used when the service data is sent, and/or information indicating the number of times the service data is sent. . Specifically, the receiving unit 200 receives, by the control part of the radio frame that sends the service data, information indicating the number of spatial data streams used when the service data is sent, and/or indicates the number of times the service data is sent. Information.

Optionally, in an embodiment of the present invention, the receiving unit 200 is specifically configured to: receive information indicating the number of spatial data streams used when the service data is sent, and the acquiring unit 201 is specifically configured to: receive according to And receiving, by the unit 200, the information indicating the number of spatial data streams used when the service data is sent, acquiring the number of spatial data streams used when the service data is sent; and acquiring, according to a preset, sending the service data. Optionally, in an embodiment of the present invention, the receiving unit 200 is specifically configured to: receive information indicating a number of times of sending the service data; and the acquiring unit 201 is specifically configured to: according to the indication received by the receiving unit 200 The information about the number of times the service data is transmitted is obtained, and the number of times the service data is transmitted is obtained. According to a preset, the number of spatial data streams used when the service data is transmitted is obtained.

Optionally, in an embodiment of the present invention, the receiving unit 200 is specifically configured to: receive a message indicating the number of spatial data streams used when the service data is sent, I, and indicate the number of times the service data is sent. The information acquiring unit 201 is configured to: obtain the service data according to information that is received by the receiving unit 200 and indicates the number of spatial data streams used when the service data is sent, and information indicating the number of times the service data is sent. The number of spatial data streams used for transmission and the number of times the business data is sent. A person skilled in the art can understand that all or part of the process of implementing the above method embodiments may be completed by using computer program related hardware, and the foregoing program may be stored in a computer readable storage medium, when executed, The foregoing steps include the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the appended claims.

Claims

Rights request

A method for transmitting service data, comprising:

Determine the number of spatial data streams used to send business data;

Transmitting the service data multiple times by using one radio frame according to the determined number of spatial data streams, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to Different spatial data streams.

2. The transmitting method according to claim 1, wherein

The different spatial data streams include:

The transmitting method according to claim 1 or 2, wherein the sending method further comprises:

Sending information indicating the number of spatial data streams used when the service data is transmitted and/or information indicating the number of times the service data is transmitted.

The transmission method according to claim 3, wherein the transmitting information indicating the number of spatial data streams used when the service data is transmitted and/or the information indicating the number of transmissions of the service data Includes:

Information indicating the number of spatial data streams used when the service data is transmitted and/or information indicating the number of transmissions of the service data is transmitted through the control portion of the radio frame.

A method for receiving service data, comprising:

Receiving service data, the service data is sent multiple times through one radio frame, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different spatial data streams;

6. The receiving method according to claim 5, characterized in that

The different spatial data streams include:

The receiving method according to claim 5 or 6, wherein the method further comprises: Information indicating the number of spatial data streams used when the service data is transmitted and/or information indicating the number of times the service data is transmitted is received.

The receiving method according to claim 7, wherein the receiving information indicating the number of spatial data streams used when the service data is transmitted and/or the information indicating the number of times the service data is transmitted includes :

And receiving information indicating the number of spatial data streams used by the control portion of the radio frame to indicate the transmission of the service data and/or information indicating the number of transmissions of the service data.

9. The receiving method according to claim 7, wherein:

And the information indicating the number of spatial data streams used when the service data is sent and/or the information indicating the number of times the service data is sent includes:

Receiving information indicating the number of spatial data streams used when the service data is sent; the number of spatial data streams used when the service data is sent and the number of times the service data is sent includes:

Obtaining, according to the received information indicating the number of spatial data streams used when the service data is sent, the number of spatial data streams used when the service data is sent;

Obtaining the number of times the service data is sent according to a preset setting;

Or

Receiving information indicating the number of times the service data is sent;

And the number of the spatial data streams used when the service data is sent and the number of times the service data is sent includes:

Obtaining, according to the received information indicating the number of times the service data is sent, the number of times the service data is sent;

Obtaining, according to a preset, the number of spatial data streams used when the service data is sent;

Or

Receiving information indicating the number of spatial data streams used when the service data is transmitted and information indicating the number of times the service data is transmitted;

And obtaining the number of spatial data streams used when the service data is sent and the The number of times the business data is sent includes:

Obtaining, according to the received information indicating the number of spatial data streams used when the service data is sent, and the information indicating the number of times the service data is sent, acquiring the number of spatial data streams used when the service data is sent. The number of times the service data is sent.

A device for transmitting service data, comprising:

a determining unit, configured to determine a number of spatial data streams used for transmitting the service data, and a sending unit, configured to send the service data multiple times by using one radio frame according to the number of spatial data streams determined by the determining unit, and In at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped onto a different spatial data stream.

The transmitting device according to claim 10, wherein the different spatial data streams comprise:

The transmitting device according to claim 10 or 11, wherein the sending unit is further configured to:

The transmitting device according to claim 12, wherein the transmitting device is specifically configured to:

14. A device for receiving service data, comprising:

a receiving unit, configured to receive service data, where the service data is sent multiple times through one radio frame, and in at least two transmissions of the multiple transmissions, the same data symbol of the service data is mapped to different On the spatial data stream;

The receiving apparatus according to claim 14, wherein the different spatial data streams comprise:

Different spatial data streams of the same subcarrier, the same space of different subcarriers Different spatial data streams for data streams or different subcarriers.

The receiving device according to claim 14 or 15, wherein the receiving unit is further configured to:

And receiving information indicating the number of spatial data streams used when the service data is transmitted and/or information indicating the number of times the service data is transmitted.

The receiving device according to claim 16, wherein the receiving unit is specifically configured to:

18. The receiving device according to claim 16, wherein:

The receiving unit is specifically configured to: receive information indicating a number of spatial data streams used when the service data is sent;

The obtaining unit is specifically configured to:

Obtaining, according to the information about the number of spatial data streams used by the receiving unit when the service data is sent, the number of spatial data streams used when the service data is sent;

Or

The receiving unit is specifically configured to: receive information indicating a number of times of sending the service data;

The obtaining unit is specifically configured to:

Obtaining the number of times the service data is sent according to the information that is received by the receiving unit and indicating the number of times the service data is sent;

Obtaining, according to a preset, a number of spatial data streams used when the service data is sent;

Or

The receiving unit is specifically configured to: receive information indicating a number of spatial data streams used when the service data is sent, and information indicating a number of times the service data is sent;

The obtaining unit is specifically configured to:

Obtaining, according to the information received by the receiving unit, the number of spatial data streams used when the service data is sent, and the information indicating the number of times the service data is sent, acquiring the spatial data stream used when the service data is sent. Number of times and the number of times the business data is sent

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86.l780/Zl0ZN3/X3d L U0/£10Z OAV