WO2016062066A1

WO2016062066A1 - Receiving method, transmitting method, receiving apparatus and transmitting apparatus for data

Info

Publication number: WO2016062066A1
Application number: PCT/CN2015/078621
Authority: WO
Inventors: 庄东风; 李萍; 张婷; 黄�俊; 秦洪峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2014-10-23
Filing date: 2015-05-08
Publication date: 2016-04-28
Also published as: CN105591683A

Abstract

A receiving method, transmitting method, receiving apparatus and transmitting apparatus for data are provided by the present invention. The data receiving method comprises: grouping the terminal antennas for transmitting data according to a preset grouping rule; informing the terminal of the grouping result after the antennas are grouped; receiving the processed data of the transmitting data sent by the terminal according to the grouping result, and the grouping result is used by the terminal for performing spread spectrum on spread spectrum code sequence corresponding to the groups of antennas to each antenna data of the terminal. By the present invention, the problem that the number of terminals for transmitting data simultaneously in a data transmission system is limited in the related art is solved, thus achieving the effect of increasing the number of terminals for transmitting data simultaneously in the data transmission system.

Description

Data receiving method, transmitting method, receiving device and transmitting device

Technical field

The present invention relates to the field of communications, and in particular to a data receiving method, a transmitting method, a receiving device, and a transmitting device.

Background technique

Direct sequence spread spectrum technology (hereinafter referred to as spread spectrum technology) is widely used in today's communication systems due to its advantages of frequency-selective fading, anti-narrowband interference, multipath fading and high concealment, such as Global Mobile Communications (Global System for Mobile Communication (referred to as GSM), Code Division Multiple Access (CDMA), and Long-Term Evolution (LTE) system. The use of spread spectrum techniques allows narrowband signals to be transmitted over a wider frequency band, allowing the receiver to demodulate at a lower signal to noise ratio, with useful signal power approaching noise power or even submerging under noise. Spread spectrum communication improves anti-jamming performance, but it occupies more bandwidth resources. At present, more communication systems use different spreading sequences for different terminals to share frequency resources to improve frequency band utilization, that is, code division multiple access. The maximum number of terminals that the code division multiple access method can support does not exceed the number of available spreading sequences, such as the Physical Uplink Control Channel (PUCCH) in the LTE system. Therefore, in the related art, the number of terminals that can simultaneously transmit data in the data transmission system is small.

In view of the problem that the number of terminals capable of simultaneously transmitting data existing in the related art is limited, an effective solution has not been proposed yet.

Summary of the invention

The embodiment of the invention provides a data receiving method, a transmitting method, a receiving device and a transmitting device, so as to solve at least the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited.

According to an aspect of an embodiment of the present invention, a data receiving method includes: grouping, according to a predetermined grouping rule, an antenna for transmitting data of a terminal; and notifying the terminal of the grouped result of the grouping; And the data obtained by processing, by the terminal, the sent data according to the grouping result, wherein the grouping result is used by the terminal to perform data on each antenna of the antenna according to a spreading code sequence corresponding to the group to which the antenna belongs. Spread spectrum processing.

In an embodiment of the present invention, the grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; transmitting the same information between different antennas The antennas of the terminals are respectively allocated to different groups; the antennas of the terminals transmitting different information between different antennas are respectively allocated to the same group; the antennas of the terminals transmitting different information between different antennas are respectively allocated to different groups.

In the embodiment of the present invention, after receiving the data that is sent by the terminal and processing the sent data according to the grouping result, the method further includes: performing equalization processing on the received data.

In the embodiment of the present invention, performing equalization processing on the received data includes: when the packet in which the antenna for transmitting the data is located includes two or more antennas, performing multi-user multiple input and multiple output on the data. MU-MIMO equalization processing; and/or, when one antenna is included in the packet in which the antenna transmitting the data is located, single-user multiple input and multiple-output SU-MIMO equalization processing is performed.

According to another aspect of the embodiments of the present invention, a data transmission method is provided, including: receiving, by a base station, a grouping result of grouping antennas set to transmit data; and data corresponding to each antenna according to a group to which the antenna belongs The spreading code sequence is subjected to spreading processing; the data after the spreading processing is transmitted and processed.

According to still another aspect of the embodiments of the present invention, there is provided a data receiving apparatus, comprising: a grouping module configured to group an antenna for transmitting data of a terminal according to a predetermined grouping rule; and a notification module configured to group the group The grouping result is sent to the terminal; the first receiving module is configured to receive data obtained by processing, by the terminal, the data sent according to the grouping result, wherein the grouping result is used by the terminal pair The data on each antenna is spread-spectrum processed according to the spreading code sequence corresponding to the group to which the antenna belongs.

In the embodiment of the present invention, the data receiving apparatus further includes: a first processing module, configured to perform equalization processing on the received data.

In the embodiment of the present invention, the first processing module includes: a first processing unit, configured to perform multi-user on the data when two or more antennas are included in a packet in which an antenna that transmits the data is included Multi-input and multi-output MU-MIMO equalization processing; and/or, the second processing unit is configured to perform single-user multi-input and multi-output SU- on the data when the antenna in which the antenna transmitting the data is located includes one antenna MIMO equalization processing.

According to still another aspect of the embodiments of the present invention, a data transmitting apparatus is provided, including: a second receiving module, configured to receive a grouping result sent by a base station to group an antenna for transmitting data; and a second processing module, set In order to perform data spreading processing on the data of each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs, the transmitting module is configured to perform transmission processing on the data after the spreading processing.

According to the embodiment of the present invention, the antenna for transmitting data of the terminal is grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the method for transmitting the packet according to the grouping result sent by the terminal is received. The data obtained by processing the data, wherein the grouping result is used by the terminal to perform spreading processing on the data of each antenna of the terminal according to the spreading code sequence corresponding to the group to which the antenna belongs, and solving the data existing in the related art. The problem that the number of terminals that can simultaneously transmit data in the transmission system is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.

DRAWINGS

The drawings are intended to provide a further understanding of the embodiments of the present invention, and are intended to be a part of the present invention, and the description of the present invention is not intended to limit the invention. In the drawing:

1 is a flowchart of a data receiving method according to an embodiment of the present invention;

2 is a flowchart of a data transmitting method according to an embodiment of the present invention;

3 is a flow chart of transmission data of a MIMO system according to an embodiment of the present invention;

4 is a block diagram showing the structure of a data receiving apparatus according to an embodiment of the present invention;

FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention; FIG.

FIG. 6 is a structural block diagram of a first processing module 62 in a data receiving apparatus according to an embodiment of the present invention;

FIG. 7 is a structural block diagram of a base station according to an embodiment of the present invention; FIG.

FIG. 8 is a block diagram showing the structure of a data transmitting apparatus according to an embodiment of the present invention; FIG.

9 is a structural block diagram of a terminal according to an embodiment of the present invention;

10 is a schematic diagram of time domain symbol positions of data signals and pilot signals in accordance with an embodiment of the present invention.

detailed description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

A data receiving method is provided in this embodiment. FIG. 1 is a flowchart of a data receiving method according to an embodiment of the present invention. As shown in FIG. 1, the process includes the following steps:

Step S102, grouping antennas of the terminal for transmitting data according to a predetermined grouping rule;

Step S104, notifying the terminal of the grouping result after the grouping;

Step S106: The data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to spread the data on each antenna of the antenna according to the spreading code sequence corresponding to the group to which the antenna belongs. deal with.

Through the above steps, the antennas for transmitting data of the terminal are grouped according to a predetermined grouping rule; the result of the grouping after the grouping is notified to the terminal; and the data obtained by the receiving terminal after processing the transmitted data according to the result of the grouping, wherein The result of the grouping is used by the terminal to perform spreading processing on the data of each antenna of the terminal according to the spreading code sequence corresponding to the group to which the antenna belongs, that is, the result of the grouping is used by the terminal to use data on the antennas belonging to the same group. The same spreading code sequence is spread-spectrum processing, and the antennas are grouped, and the data transmitted on one group of antennas is spread using the same spreading code sequence, so that the number of the spreading code sequences is kept constant. Next, the number of receiving antennas is increased to increase the spatial freedom of the multi-antenna wireless channel, thereby increasing the number of terminals that can simultaneously perform data transmission. The invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.

Among them, one base station can support data transmission of multiple terminals, and each terminal can transmit data using a single antenna or multiple antennas. The base station can group all antennas of all terminals, and all antennas in the same group can use the same time domain and frequency domain resources to transmit data, and all antennas in different groups use the same or different time domain and frequency domain resources to send data. . The above grouping rule may include at least one of: allocating antennas of different terminals to the same group; allocating antennas of different terminals to different groups; respectively assigning antennas of terminals transmitting the same information between different antennas to Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.

In a preferred embodiment, after the data obtained by processing the sent data according to the packet result sent by the receiving terminal, the method further includes: performing equalization processing on the received data. Wherein the terminal is received at the base station After the transmitted data, the received data is first de-framed, and then the de-framed data of each receiving antenna is despread on each spreading code track, and then equalized on each code channel to obtain each Demodulated data of data on all antennas in each code channel.

The performing equalization processing on the received data by the base station may include: performing multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is located includes two or more antennas; and/or When the antenna in which the antenna for transmitting data is located includes one antenna, the data is subjected to single-user multiple input and multiple-output SU-MIMO equalization processing. That is, if there are multiple antennas in the packet corresponding to the current code channel, MU-MIMO equalization is performed; if there is only one antenna in the packet corresponding to the current code channel, SU-MIMO equalization is performed. And, if the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.

FIG. 2 is a flowchart of a data sending method according to an embodiment of the present invention. As shown in FIG. 2, the process includes the following steps:

Step S202, receiving a grouping result sent by the base station to group the antennas for transmitting data;

Step S204, performing spreading processing on the data on each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs;

Step S206, performing transmission processing on the data after the spread spectrum processing.

Through the above steps, the result of grouping the antennas for transmitting data sent by the base station is received; the data on each antenna is subjected to spreading processing according to the spreading code sequence corresponding to the group to which the antenna belongs; and the data after the spreading processing is performed. Transmitting processing is implemented to group antennas, and data transmitted on a group of antennas is spread using the same spreading code sequence, so that the number of receiving antennas is increased while keeping the number of spreading code sequences unchanged. The spatial freedom of the multi-antenna wireless channel is increased, thereby increasing the number of terminals that can be simultaneously transmitted. The invention solves the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, thereby achieving the effect of increasing the number of terminals simultaneously transmitting data in the data transmission system.

3 is a transmission data flow diagram of a Multiple Input Multiple Output (MIMO) system according to an embodiment of the present invention. As shown in FIG. 3, the process includes the following steps:

Step S302, the base station groups each antenna of each user terminal, each packet corresponds to a spreading code sequence, and the base station notifies the user terminal of the grouping result;

Step S304, each user terminal performs coding and constellation point mapping on the data transmitted on each antenna, and performs spreading according to the grouping result sent by the base station, and transmits data on the corresponding antenna after resource mapping and framing;

Step S306, the base station despreads the data received on each of the receiving antennas on each of the spreading code channels, and then performs MU-MIMO or SU-MIMO equalization on each code channel to obtain each of each user terminal. The demodulation result of the data transmitted on the transmitting antenna.

In the embodiment, a data receiving device and a data transmitting device are provided, which are used to implement the above-mentioned embodiments and preferred embodiments, and are not described again. As used below, the term "module" may implement a combination of software and/or hardware of a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.

4 is a structural block diagram of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 4, the apparatus includes a grouping module 42, a notification module 44, and a first receiving module 46. The device will be described below.

The grouping module 42 is configured to group the antennas for transmitting data of the terminal according to a predetermined grouping rule; the notification module 44 is connected to the grouping module 42, and is configured to notify the terminal of the grouping result after the grouping; the first receiving module 46. Connect to the foregoing notification module 44, and set the data obtained by processing the sent data according to the grouping result sent by the terminal, where the result of the grouping is used by the terminal to correspond to the data of each antenna of the antenna according to the group to which the antenna belongs. The spreading code sequence is subjected to spread spectrum processing.

Wherein, the foregoing grouping rule includes at least one of: assigning antennas of different terminals to the same group; assigning antennas of different terminals to different groups; and assigning antennas of terminals transmitting the same information between different antennas to respectively Different groups; antennas of terminals transmitting different information between different antennas are respectively assigned to the same group; antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.

FIG. 5 is a block diagram showing a preferred structure of a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 5, the apparatus includes a first processing module 52 in addition to all the modules shown in FIG. Description.

The first processing module 52 is coupled to the first receiving module 46 and configured to perform equalization processing on the received data.

FIG. 6 is a structural block diagram of a first processing module 52 in a data receiving apparatus according to an embodiment of the present invention. As shown in FIG. 6, the first processing module 52 includes a first processing unit 62 and/or a second processing unit 64. The first processing module 52 will be described below.

The first processing unit 62 is configured to perform multi-user multiple input and multiple MU-MIMO equalization processing on the data when the packet in which the antenna for transmitting data is included includes two or more antennas; and/or the second processing unit 64. Set to perform single-user multiple-input and multi-output SU-MIMO equalization processing on the data when the antenna in which the antenna for transmitting data is located includes one antenna.

7 is a structural block diagram of a base station according to an embodiment of the present invention. As shown in FIG. 7, a base station performs deframing processing on data of each of its receiving antennas, and the base station despreads data of each of its receiving antennas in each spread spectrum. Perform despreading on the code track, and then perform equalization on each code channel to obtain demodulated data of all antennas in each code channel: if the current spread spectrum code corresponding packet includes multiple antennas, perform MU-MIMO equalization If the current packet of the spreading code channel includes only one antenna, SU-MIMO equalization is performed. If the same information is transmitted between different antennas of the same user terminal, the inter-antenna combining is performed.

FIG. 8 is a structural block diagram of a data transmitting apparatus according to an embodiment of the present invention. As shown in FIG. 8, the apparatus includes a second receiving module 82, a second processing module 84, and a transmitting module 86. The device will be described below.

The second receiving module 82 is configured to receive a packet result sent by the base station to group the antenna for transmitting data, and the second processing module 84 is connected to the second receiving module 82, and is configured to follow the data on each antenna. The spreading code sequence corresponding to the group to which the antenna belongs is subjected to spreading processing; the transmitting module 86 is connected to the second processing module 84, and is configured to perform transmission processing on the data after the spreading processing.

9 is a structural block diagram of a terminal according to an embodiment of the present invention. As shown in FIG. 9, each user terminal performs spreading processing on transmission data for each antenna according to a packet result notified by a base station: the same group uses the same A spreading code sequence, using different spreading code sequences between different groups. Then, the spread spectrum result is mapped to the specified time domain and frequency domain resource location, and data is sent after the data is framed.

For the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, in the embodiment of the present invention, based on the direct spreading code division multiple access technology and the MIMO space division multiplexing technology, a A data transmission system and device to increase the number of terminals that can be simultaneously transmitted in the system.

MIMO technology is based on multi-antenna transmission and multi-antenna reception, and has gradually become the core technology in modern communication systems. Theoretical studies have shown that MIMO technology can multiply the channel capacity without increasing the channel bandwidth and antenna transmit power, and the channel capacity increases linearly with the number of antennas. In particular, when the spatial sub-channel formed between the transmitting end and the receiving end antenna array is sufficiently independent, the spatial channel can be regarded as a plurality of parallel spatial transmission channels, thereby allowing multiple data streams (multi-terminal data streams) to be The same time domain and frequency domain resources are transmitted through different spatial subchannels, that is, space division multiplexing.

In the embodiment of the present invention, a terminal device in a wireless communication system is provided, and the operations in the terminal are described below:

In Orthogonal Frequency Division Multiplexing (OFDM) system, the total number of subcarriers is

Each resource block (Resource Block, RB for short) includes

Continuous subcarriers, the base station allocates different resource index parameters for each antenna of each user terminal

The data to be transmitted by the user terminal u is coded and modulated.

The spreading sequence that all user terminals can use is

The antenna p of the user terminal u uses the index number as

Spreading sequence for spreading:

Here, l corresponds to the data symbol position index of the OFDM system.

The user terminal u cyclically shifts and precodes the spread data:

The RB location corresponding to the data z ^(u,p) (k,l) resource mapping of the user terminal u is:

among them,

The user terminal transmits a reference signal (or a pilot signal) at the same RB position as the data signal, and the reference signal consists of a base sequence and a cyclic shift:

Here,

For the pilot mother code, different antennas of different user terminals use different cyclic shifts

The time domain symbol positions of the data signals and pilot signals transmitted by the terminal are as shown in FIG. 10, which is a schematic diagram of the time domain symbol positions of the data signals and the pilot signals according to an embodiment of the present invention.

In the embodiment of the present invention, a base station apparatus in a wireless communication system is further provided, and the following operations in the base station are continued:

The base station side receives the signal of each terminal UE, and extracts the data signal according to the reverse process of resource mapping.

And reference signal

Where l _data =0, 1, ..., N _SF is the symbol position index of the data signal, l _ref =0, 1, ..., N _ref is the symbol position index of the reference signal.

The channel estimation of the reference signal comprises the steps of: multiplying the received reference signal by a conjugate of the local mother code sequence to perform the annihilation of the mother code; and performing an FFT operation on the data after the mother code is decoded, the cyclically shifting is performed in the transformed data. Extract the corresponding symbol and the channel estimation value of the receiving antenna; the channel estimation value after the inter-symbol average

The data signal processing process includes the steps of: performing pre-coding and de-coupling in accordance with the pre-coding and cyclic shift inverse processes; for each sub-carrier data, performing despreading on each occupied spreading code channel:

Equilibrating each antenna of each user terminal as a single antenna user terminal, then for two user terminals u ¹ and u ² having the same spreading sequence

Perform MU-MIMO equalization for two UEs:

among them,

Here, I is the unit matrix,

with

The (column vector) is the demodulation result of the two user terminals u ₁ and u ₂ , respectively.

Then, the multi-antenna equalization results of each user terminal are combined:

Here, z ^(u) (k) is the final demodulation result of the user u.

It will be apparent to those skilled in the art that the various modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. The steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software.

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

Industrial applicability

As described above, the above embodiments and the preferred embodiments solve the problem that the number of terminals that can simultaneously transmit data in the data transmission system existing in the related art is limited, and thus the terminal that simultaneously transmits data in the data transmission system is improved. The effect of the quantity.

Claims

A data receiving method includes:

The antennas for transmitting data of the terminal are grouped according to a predetermined grouping rule;

Notifying the terminal of the grouped result after the grouping;

Receiving data obtained by processing, by the terminal, the transmitted data according to the result of the grouping, wherein the grouping result is used by a spreading code corresponding to a packet to which the terminal belongs to the data of each antenna of the terminal. The sequence is spread-spectrum processed.
The method of claim 1 wherein the grouping rule comprises at least one of:

Allocating antennas of different terminals to the same group;

Assign antennas of different terminals to different groups;

Antennas of terminals transmitting the same information between different antennas are respectively assigned to different groups;

Antennas of terminals transmitting different information between different antennas are respectively assigned to the same group;

Antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
The method according to claim 1, wherein after receiving the data obtained by processing, by the terminal, the sent data according to the grouping result, the method further comprises:

The received data is equalized.
The method of claim 3 wherein the equalizing the received data comprises:

When two or more antennas are included in the packet in which the antenna transmitting the data is located, multi-user multiple input and multiple MU-MIMO equalization processing is performed on the data; and/or,

When one antenna is included in the packet in which the antenna transmitting the data is located, single-user multiple input and multiple-output SU-MIMO equalization processing is performed.
A data transmission method includes:

Receiving, by the base station, a grouping result of grouping antennas for transmitting data;

Performing spreading processing on the data on each antenna according to the spreading code sequence corresponding to the group to which the antenna belongs;

The data after the spread spectrum processing is transmitted.
A data receiving device includes:

a grouping module, configured to group the antennas of the terminal for transmitting data according to a predetermined grouping rule;

a notification module, configured to notify the terminal of the grouping result after the grouping;

a first receiving module, configured to receive data obtained by processing, by the terminal, the sent data according to the grouping result, where the grouping result is used by the terminal according to the antenna on each antenna The spreading code sequence corresponding to the belonging packet is subjected to spreading processing.
The apparatus of claim 6, wherein the grouping rule comprises at least one of the following:

Allocating antennas of different terminals to the same group;

Assign antennas of different terminals to different groups;

Antennas of terminals transmitting the same information between different antennas are respectively assigned to different groups;

Antennas of terminals transmitting different information between different antennas are respectively assigned to the same group;

Antennas of terminals transmitting different information between different antennas are respectively assigned to different groups.
The apparatus of claim 6 further comprising:

The first processing module is configured to perform equalization processing on the received data.
The apparatus of claim 8 wherein said first processing module comprises:

a first processing unit configured to perform multi-user multiple input and multiple MU-MIMO equalization processing on the data when two or more antennas are included in a packet in which the antenna transmitting the data is located; and/or

The second processing unit is configured to perform single-user multiple input and multiple-output SU-MIMO equalization processing on the data when the antenna in which the antenna transmitting the data is located includes one antenna.
A data transmitting device includes:

a second receiving module, configured to receive, by the base station, a grouping result of grouping antennas for transmitting data;

a second processing module, configured to perform frequency-spreading processing on the data on each antenna according to a sequence of spreading codes corresponding to the group to which the antenna belongs;

The sending module is configured to perform transmission processing on the data after the spread spectrum processing.