WO2017054545A1

WO2017054545A1 - Data transmission method and device

Info

Publication number: WO2017054545A1
Application number: PCT/CN2016/088946
Authority: WO
Inventors: 焦斌
Original assignee: 电信科学技术研究院
Priority date: 2015-09-30
Filing date: 2016-07-06
Publication date: 2017-04-06
Also published as: CN106559130A; CN106559130B

Abstract

The present invention discloses a data transmission method and device. The method comprises: determining a data frame structure formed by several consecutive subframes, with each of the subframes comprising an uplink control region transmitting scheduling request information, a downlink control region transmitting data channel resource allocation information, and a data region transmitting data with a data channel resource, wherein a protection time interval between the uplink control region, the downlink control region, and the data region is reserved; and transmitting data with the data frame. The present invention well adapts to traffic in various transmission modes or transmission directions, improves a utilization rate of air interface resources, and reduces a waiting delay for data transmission.

Description

Data transmission method and device

The present application claims priority to Chinese Patent Application No. 201510642497.1, entitled "A Data Transmission Method and Apparatus", filed on Sep. 30, 2015, the entire contents of .

Technical field

The present invention relates to the field of wireless communication technologies, and in particular, to a data transmission method and apparatus.

Background technique

1 is a schematic structural diagram of a TDD frame of an existing LTE frame. As shown in the figure, in a Long Term Evolution (LTE) Time Division Duplex (TDD) frame structure, a ratio of uplink to downlink is fixed. Each sub-frame is fixed in direction, and the uplink and downlink conversion is performed in the length of one field (5 ms).

The traditional LTE frame structure only supports the distinction between "upstream" and "downstream", and the support of "direct communication" is not considered in the design of the frame structure. This makes the prior art a disadvantage in that each "subframe" of the existing LTE technology is pre-defined in the transmission direction, and if there is no corresponding manner of data transmission to be transmitted at the frame time, this will result in waste of resources.

Summary of the invention

The invention provides a data transmission method and device, which are used for improving the utilization of air interface resources and reducing the waiting delay of data transmission.

A data transmission method is provided in the embodiment of the present invention, including:

Determining a data frame structure, the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and transmitting on the data channel resource a data area of the data, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

Data is transmitted in accordance with the data frame.

Optionally, in an implementation, the data channel is configured in one of the following manners or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

Each data channel occupies an integer number of physical resource blocks in the frequency domain;

The number and/or bandwidth of the data channels are dynamically configured according to the amount of data transmission in each transmission direction of the current subframe.

Optionally, in the implementation, dynamically configuring the number and/or bandwidth of the data channels according to the data transmission amount in each transmission direction of the current subframe is configured by the cluster head node.

Optionally, in implementation, the data of the data area includes: a data transmission block, a transmission parameter of the data transmission block is determined before transmission, and the acknowledgement information is confirmed by a MAC PDU-based ACK/NACK acknowledgement mechanism. ;

Or, the data of the data area includes: a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.

Optionally, in an implementation, when the data of the data area includes a transmission parameter indication part, a data transmission block part, and an ACK/NACK part, the method further includes: a GAP part.

Optionally, in the implementation, each data channel transmits data by using an orthogonal multiple access method or a non-orthogonal multiple access method.

Optionally, in implementation, the scheduling request information includes one or a combination of the following information:

Scheduling request information sent by the end node to the cluster head node during data transmission;

Scheduling request information sent by the end node to the cluster head node during D2D data transmission;

Random access resource information configured by the cluster head node during the initial connection establishment process.

Optionally, in implementation, the data channel resource allocation information includes one or a combination of the following information:

The cluster head node is data channel resource information allocated by the end node to the cluster head node for uplink transmission;

The cluster head node is data channel resource information allocated by the cluster head node to the end node for downlink transmission;

The cluster head node is data channel resource information allocated for D2D transmission between the end node and the end node.

A data transmission apparatus is provided in the embodiment of the present invention, including:

a determining module, configured to determine a data frame structure, where the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and a data area for transmitting data on the data channel resource, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

a transmission module, configured to transmit data according to the data frame.

Optionally, in an implementation, the determining module is further configured to configure the data channel in one of the following manners or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

Optionally, in an implementation, the determining module is further configured to dynamically configure, by the cluster head node, the number and/or bandwidth of the data channel according to the data transmission amount in each transmission direction of the current subframe.

Optionally, in an implementation, the transmission module is further configured to transmit data according to the data frame, where the data of the data area includes: a data transmission block, and a transmission parameter of the data transmission block is determined before transmission, and is confirmed. The information is confirmed by a MAC PDU based ACK/NACK acknowledgment mechanism; or the data of the data area includes: a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.

Optionally, in implementation, the transmission module is further configured to transmit data according to the data frame, where the data in the data area includes a transmission parameter indication part, a data transmission block part, and an ACK/NACK In part, it further includes: the GAP part.

Optionally, in an implementation, the transmission module is further configured to transmit data in each of the data channels by using an orthogonal multiple access mode or a non-orthogonal multiple access mode.

Optionally, in an implementation, the determining module is further configured to: when determining the uplink control area, determine that the scheduling request information includes one or a combination of the following information:

Optionally, in an implementation, the determining module is further configured to: when determining the downlink control region, determine that the data channel resource allocation information includes one or a combination of the following information:

A processor for reading a program in the memory, performing the following process:

A transceiver for receiving and transmitting data under the control of a processor, performing the following processes:

Data is transmitted in accordance with the data frame.

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

The beneficial effects of the present invention are as follows:

In the technical solution provided by the embodiment of the present invention, in the frame structure, the uplink control area is used to transmit scheduling request information, and the downlink control area is used to transmit data channel resource allocation information, where the data area is used for Data is transmitted on the data channel resource. There is no "fixed" relationship between the three parts. After the end node requests resource scheduling in the uplink control area, the cluster head node schedules transmission resources, and informs the relationship between the resource and the data channel in the downlink control area, and the end node can respond accordingly. Data is transmitted and received on the data channel. In this process, the data transmission direction does not need to be fixed, and the transmission direction does not need to be defined in advance, and the control symbol portion and the data portion do not need to be in the same direction. Therefore, the frame provided in the embodiment of the present invention. In the structure, the data transmission direction is dynamically variable, and can also support parallel transmission of multiple directions in one subframe, thereby reducing the problem of waste of resources; and not when the direction of the frame does not match the direction of the actually arrived packet transmission. As a result, the data packet experiences a longer waiting delay in the buffer (Buffer), resulting in a data transmission delay; and the control signaling interaction delay before the data transmission can be greatly reduced.

It can be seen that the frame structure design provided by the embodiment of the present invention has great flexibility, so that the traffic of various transmission modes and transmission directions can be well adapted, the utilization of air interface resources is improved, and the waiting delay of data transmission is reduced.

DRAWINGS

The drawings described herein are intended to provide a further understanding of the invention, and are intended to be a part of the invention. In the drawing:

1 is a schematic structural diagram of an existing LTE frame TDD frame in the background art;

2 is a schematic structural diagram of a short-range communication network including D2D direct communication according to an embodiment of the present invention;

3 is a schematic flowchart of an implementation process of a data transmission method according to an embodiment of the present invention;

4 is a schematic structural diagram of a frame according to an embodiment of the present invention;

FIG. 5 is a schematic diagram of a specific implementation of an uplink control part in a frame structure according to an embodiment of the present invention; FIG.

6 is a schematic diagram of a specific implementation of a downlink control part in a frame structure according to an embodiment of the present invention;

FIG. 7 is a schematic diagram of a self-contained data channel structure 1 according to an embodiment of the present invention; FIG.

FIG. 8 is a schematic diagram of a self-contained data channel structure 2 according to an embodiment of the present invention; FIG.

FIG. 9 is a schematic diagram of a self-contained data channel structure 3 according to an embodiment of the present invention; FIG.

FIG. 10 is a schematic structural diagram of a multi-data channel according to an embodiment of the present invention; FIG.

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

FIG. 12 is a schematic structural diagram of a data transmission apparatus according to an embodiment of the present invention.

detailed description

Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

First, the environment for implementing the program is described as follows:

2 is a schematic structural diagram of a short-range communication network including device-to-device (D2D) direct communication. As shown in the figure, a cluster head (Cluster Head, CH) and an end node (End) are included in the communication network. Point, EP), wherein the CH performs downlink data transmission to the EP, and the EP performs uplink data transmission to the CH, which is characterized in that direct communication data transmission such as D2D is also performed between the EPs. The D in the D2D represents the Device, and is generally distinguished by a communication function area in the communication protocol. For example, in a cellular network, the base station is responsible for controlling functions, and the terminal (such as User Equipment (UE)) is controlled by the base station. Therefore, direct communication between terminals (also referred to as Device-To-Device communication, also called inter-terminal direct communication), in a traditional cellular network, terminals (such as UEs) cannot directly communicate with each other and need to be forwarded through the base station.

The background of the implementation of this scheme is mainly in the distributed network architecture, the cluster head (CH) is responsible for the control function, and the end node (EP) is controlled by the cluster head (CH), so between the end nodes (EP) in this scheme Direct communication is also known as D2D direct communication (borrowing cellular Device-To-Device communication). In addition, it should be noted that the cluster head (CH) is mainly defined from the perspective of function and role in the scheme, that is to say, the CH function can be implemented on the terminal type device in the device implementation (a characteristic terminal is configured as CH) Mode, other terminals are configured in EP mode), can also be in cellular network or wireless It is implemented on a Wireless Local Area Networks (WLAN) network (for example, an existing base station device or an access point wireless router (AccessPoint) device is configured in a CH mode, and an existing terminal is configured in an EP mode).

In the future localization and close-range communication scenarios, the communication network shown in Figure 2 needs to be enhanced in terms of communication capacity, delay, and reliability. In the short-range communication scenario, the service statistics and terminal distribution will exhibit very serious non-uniformity. Therefore, in the frame structure, it is necessary to design an adaptive central scheduling for the frame structure in the short-range local communication scenario. The solution and the dynamic adaptation of the uplink, downlink, and direct mode transmission schemes, therefore, a frame structure design scheme for the above requirements is proposed in the embodiment of the present invention.

Specifically, the problem of the existing frame structure is that, firstly, each "subframe" of the existing LTE technology is pre-defined with a transmission direction, so if there is no corresponding manner of data transmission to be transmitted at the frame time, resource waste is caused. In addition, if the direction of the frame does not match the direction of the packet that actually arrives, it will also cause the packet to experience a longer latency in the buffer, causing problems in data transmission delay. In the frame structure provided by the embodiment of the present invention, the data transmission direction is dynamically variable, and parallel transmission of multiple directions in one subframe can be supported, thereby reducing the problem of resource waste.

Moreover, in the existing data transmission process, before the terminal performs data transmission, the terminal first needs to send the control signaling through the control symbol part to request the data transmission resource, but the control symbol part and the data are required in the existing frame structure. The parts must be in the same direction, so the delay caused by the signaling process will be greatly increased. In the frame structure provided by the embodiment of the present invention, the “uplink control part” and the “downlink control part” are included in each subframe, so that the control signaling interaction process delay before data transmission can be greatly reduced.

The following describes an implementation of data transmission using the frame structure provided by the embodiment of the present invention.

3 is a schematic diagram of an implementation process of a data transmission method. As shown in the figure, when data transmission is performed by using a frame structure provided by an embodiment of the present invention, the method may include:

Step 301: Determine a data frame structure, where the data frame is composed of a plurality of consecutive subframes, each of which The frame includes: an uplink control area for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and a data region for transmitting data on the data channel resource, wherein between the uplink control region, the downlink control region, and the data region Leave a guard interval;

Step 302: Transmit data according to the data frame.

4 is a schematic diagram of a frame structure. As shown in the figure, in the implementation, a "subframe" of the data frame structure is composed of three parts: an "uplink control area", a "downlink control area", and a "data area". A number of consecutive subframes are formed (integer multiples), and the implementation assumes that the system is a synchronous system, so the subframes in the frame are consecutively assigned subframe numbers.

The system and the device are subject to half-duplex restriction, so a time guard interval Guard Period (GP) is reserved between the "uplink control area" and the "downlink control area". In addition, a time guard interval is also reserved between the "Control Area" and the "Data Area".

In an implementation, the data channel can be configured in one of the following ways or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

In a specific implementation, the number and/or bandwidth of the data channels are dynamically configured according to the data transmission amount in each transmission direction of the current subframe, which may be configured by the cluster head node.

Specifically, the data area may be composed of multiple frequency division “data channels”, the bandwidth of the data channel is dynamically variable, and the guard interval is reserved in the frequency domain between the dynamic data channels, and each data channel occupies an integer number of physics in the frequency domain. A physical resource block (PRB), the cluster head can dynamically configure the number of data channels and the bandwidth occupied by each data channel according to the data transmission amount in each transmission direction of the current subframe.

In the data transmission area of the same subframe, data transmission in multiple transmission modes may be performed in parallel, including uplink, downlink, or direct transmission, and the uplink transmission refers to a common end node (EP) to a cluster head (CH) in the cluster. The transmission between (or called an access point), the downlink transmission refers to the transmission of the cluster head (CH) (or called access point) to the ordinary end node (EP) in the cluster, and the direct transmission refers to the ordinary end node (EP). Transfer between).

The specific implementation of the three parts will be described below with reference to examples.

1. Uplink control area

The uplink control area is used to transmit scheduling request information, and the scheduling request information may include one or a combination of the following information:

Scheduling request information sent by the end node (EP) to the cluster head node (CH) during data transmission;

Scheduling request information sent by the end node to the cluster head node (CH) during D2D data transmission;

Random access resource information configured by the cluster head node (CH) during initial connection establishment.

Specifically, the role of the uplink control area may include:

For the uplink data transmission process, the end node (EP) sends a scheduling request (SR) to the cluster head node (CH);

During the D2D data transmission process, the end node sends a D2D scheduling request (D-SR) to the cluster head node (CH);

Configure the initial connection to establish random access resources.

Example 1:

In this embodiment, the uplink control part is designed and implemented. FIG. 5 is a schematic diagram of the uplink control part in the frame structure. As shown in the figure, in the uplink control part, the end node performs a scheduling request SR to the cluster head, in order to avoid SR conflict. After the cluster head is accessed at the end node, the cluster head can allocate a dedicated SR transmission resource for each end node in the uplink control part for each end node. In FIG. 5, the frequency is divided into examples, and each EP is allocated. A dedicated resource on a frequency, shown as EP1 to EP5.

The dedicated SR resource may adopt time division, frequency division, code division, or a combination of time division, frequency division and code division, for example, Sparse Code Multiple Access (SCMA) based on multi-dimensional modulation and sparse code spreading.

In each subframe, if the end node has data to transmit, the end node uses the cluster head to transmit the SR for its own pre-allocated dedicated resource. For example, the end node 1 adopts EP1 assigned to it... the end node 5 adopts Assigned EP5 and so on.

Here, although not shown in FIG. 5, in a specific implementation, a specific resource may be reserved in the uplink control part for the end node to send a random access message. The resources used for random access may also overlap with the physical resources that send the SR.

2. Downstream control area

The downlink control zone is used for transmitting data channel resource allocation information, and the data channel resource allocation information may include one or a combination of the following information:

The cluster head node (CH) is data channel resource information allocated by the end node (EP) to the cluster head node (CH) for uplink transmission;

The cluster head node (CH) is data channel resource information allocated by the cluster head node (CH) to the end node (EP) for downlink transmission;

The cluster head node (CH) is data channel resource information allocated for D2D transmission between the end node (EP) and the end node (EP).

Specifically, the role of the downlink control area may include transmitting one or a combination of the following information:

Data channel resource information allocated for uplink transmission; wherein the allocated uplink transmission data channel resource information may be referred to as Grant;

Data channel resource information allocated for downlink transmission; wherein the allocated downlink transmission data channel resource information may be referred to as Grant;

The allocated data channel resource information is directly transmitted for D2D; wherein the allocated D2D direct transmission data channel resource information may be referred to as Grant.

Example 2:

This embodiment is a downlink control part design implementation manner, and FIG. 6 is a schematic diagram of a specific implementation of the downlink control part in the frame structure. As shown in the figure, the downlink control part is used by the cluster head to send the data channel occupation of the subframe to the end node in the cluster. Scheduling information (data sending EP node and data receiving EP node need to receive).

For example, if EP1 and EP2 are scheduled in the current subframe, and EP1 is the transmitting end and EP2 is the receiving end, the control channel needs to indicate the end node identifier of the scheduled terminal (in the example, EP1 and EP2), and the end node is The data channel information that EP1 allocates in this transmission may specifically include the starting position of the control channel in the frequency domain, and the occupied bandwidth. The transmitting end EP1 performs data transmission using the corresponding resource of the current subframe data portion according to the resource indication received from the cluster head CH. The receiving end EP2 can determine the receiving resource in the data area according to the downlink indication.

3, the data area

The data area is used for transmitting data on the data channel resource, and the data of the data area may include: a data transmission block, the transmission parameter of the data transmission block is determined before transmission, and the confirmation information is based on media access control ( Media Access Control (MAC) Packet Data Unit (PDU) acknowledgement/negative Acknowledgement (ACK/NACK) confirmation mechanism for confirmation;

Specifically, the role of the data area includes:

Performing self-contained uplink data transmission on the data channel;

Self-contained downlink data transmission on the data channel;

Self-contained downlink D2D transmission is performed on the data channel.

In the implementation, regarding the “self-contained self-contained”, in the traditional cellular network, the data transmitted by the data channel cannot be processed separately. For example, before the receiving end receives the data, it must know the transmission parameters used by the transmitting end. The transmission parameter is indicated on the control channel; for example, the terminal fails to receive the ACK indication on the data channel through the control channel; thus, it can be seen that the traditional data channel itself cannot support the complete transmission process of the data (required and control channel) work close with). In the present solution, the data channel is independent when performing data transmission, and the receiving end can decode only according to the information carried by the user data channel itself when receiving, thereby implementing weak association between the data channel and the control channel.

For a simple self-contained transport block, it can contain only the "transport block part", the pass of the transport block The input parameters are statically determined before data transmission, for example, by Quadrature Phase Shift Keying (QPSK), and the acknowledgment information may adopt a MAC PDU-based ACK/NACK acknowledgment mechanism.

The complex self-contained data channel may be composed of a "transmission parameter indication portion", a "transport block portion", and an ACK/NACK portion. Each part separately occupies different Orthogonal Frequency Division Multiplex (OFDM) symbol resources of different data channels.

When the data of the data area includes the transmission parameter indication portion, the data transmission block portion, and the ACK/NACK portion, it may further include: a time interval (GAP) portion. GAP is used to receive feedback waiting.

That is, in a specific implementation, for the feedback transmission mode, the data structure of the data channel may include a “transmission parameter+reference symbol” area, a “data transmission block” area, a GAP area, and an ACK/NACK feedback area. For the non-feedback data transmission mode, the data area is composed of a "reference symbol" area and a "data transmission block" area, which will be described below by way of example.

Example 3:

7 is a schematic diagram of a self-contained data channel structure 1. As shown, the data channel structure includes only a "reference symbol" portion and a "data transmission block" portion, wherein the "reference symbol" portion is used for the receiver to perform coherent demodulation. In this mode, the transmission parameters used by the sender are statically configured, and the receiver receives the default transmission parameters when receiving.

Example 4:

8 is a schematic diagram of a self-contained data channel structure 2, as shown, as an enhancement to the data channel structure 1, the data structure 2 may allow the transmitting end to indicate the transmission parameters used by the "data transmission block" portion through the "transmission parameter indication" area. . The advantage of this design is that the sender can adjust the transmission parameters according to the channel conditions, so it is more flexible and helps to improve system throughput.

Example 5:

9 is a schematic diagram of a self-contained data channel structure 3, as shown in the figure, as an enhancement to the data structure 1, in order to further reduce the delay, a feedback mechanism may be introduced in the current data frame, that is, the receiving end may receive the data block after receiving Correct or incorrect information received on the data block by ACK/NACK The resource notification sender. The GAP part does not perform any transmission delay for the transmitting end to wait for data transmission and the processing of the receiving end.

In implementation, each data channel can transmit data using orthogonal multiple access or non-orthogonal multiple access.

FIG. 10 is a schematic diagram of a multi-data channel structure. As shown in the figure, channel 1 adopts the data channel structure 3 in FIG. 9 of Embodiment 5, and channel 2 adopts the data channel structure 1 in FIG. 7 of Embodiment 3.

In a specific implementation, when there are multiple data channels, different data channels may adopt different configurations, and different configurations may be adopted in the waveform and multiple access modes, for example, channel 1 adopts orthogonal multiple access mode. Channel 2 is configured as a non-orthogonal multiple access method. Specifically, if the channel 1 is in a code division multiple access (CDMA) manner based on direct sequence spread spectrum, mutually orthogonal multiplex transmission is simultaneously performed. Channel 2 can be configured with multiple non-orthogonal parallel transmissions, for example using SCMA technology. In order to avoid the duplex problem, the same channel can be requested to transmit only in one direction (upstream, downlink or D2D).

Based on the same inventive concept, a data transmission device is further provided in the embodiment of the present invention. Since the principle of solving the problem is similar to a data transmission method, the implementation of the device can refer to the implementation of the method, and the repetition is no longer Narration.

11 is a schematic structural diagram of a data transmission device. As shown in the figure, the device may include:

a determining module 1101, configured to determine a data frame structure, where the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and a data area for transmitting data on the data channel resource, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

The transmission module 1102 is configured to transmit data according to the data frame.

In an implementation, the determining module may further be configured to configure the data channel in one of the following ways or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

In an implementation, the determining module may be further configured to dynamically configure the number and/or bandwidth of the data channels by the cluster head node according to the data transmission amount in each transmission direction of the current subframe.

In an implementation, the transmission module may be further configured to transmit data according to the data frame, where the data of the data area includes: a data transmission block, the transmission parameter of the data transmission block is determined before transmission, and the confirmation information is Confirmed by the MAC PDU based ACK/NACK acknowledgment mechanism; or, the data of the data area includes: a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.

In an implementation, the transmission module is further configured to transmit data according to the data frame, where the data in the data area further includes: a GAP part when the data parameter includes a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.

In implementation, the transmission module may be further configured to transmit data in each of the data channels using orthogonal multiple access mode or non-orthogonal multiple access mode.

In an implementation, the determining module may be further configured to: when determining the uplink control region, determine that the scheduling request information includes one or a combination of the following information:

In an implementation, the determining module is further configured to: when determining the downlink control region, determine that the data channel resource allocation information includes one or a combination of the following information:

The cluster head node is a data channel resource allocated for D2D transmission between the end node and the end node. information.

For convenience of description, the various parts of the above described devices are described in terms of functions divided into various modules or units. Of course, the functions of the various modules or units may be implemented in one or more software or hardware in the practice of the invention.

When the technical solution provided by the embodiment of the present invention is implemented, it can be implemented as follows.

12 is a schematic structural diagram of a data transmission device. As shown in the figure, the device may include:

The processor 1200 is configured to read a program in the memory 1220 and perform the following process:

The transceiver 1210 is configured to receive and transmit data under the control of the processor 1200, and performs the following processes:

Data is transmitted in accordance with the data frame.

In implementation, the data channel is configured in one of the following ways or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

In the implementation, the number and/or bandwidth of the data channels are dynamically configured according to the data transmission amount in each transmission direction of the current subframe, which is configured by the cluster head node.

In an implementation, the data of the data area includes: a data transmission block, the transmission parameter of the data transmission block is determined before transmission, and the acknowledgement information is confirmed by a MAC PDU-based ACK/NACK acknowledgement mechanism;

Or, the data of the data area includes: a transmission parameter indication part, a data transmission block part, and ACK/NACK part.

In implementation, when the data of the data area includes a transmission parameter indication part, a data transmission block part, and an ACK/NACK part, further includes: a GAP part.

In implementation, each data channel transmits data using orthogonal multiple access or non-orthogonal multiple access.

In implementation, the scheduling request information includes one or a combination of the following information:

In implementation, the data channel resource allocation information includes one or a combination of the following information:

In FIG. 12, the bus architecture can include any number of interconnected buses and bridges, specifically linked by one or more processors represented by processor 1200 and various circuits of memory represented by memory 1220. The bus architecture can also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and, therefore, will not be further described herein. The bus interface provides an interface. Transceiver 1210 may be a plurality of components, including a transmitter and a receiver, providing means for communicating with various other devices on a transmission medium. For different user equipments, the user interface 1230 may also be an interface capable of externally connecting the required devices, including but not limited to a keypad, a display, a speaker, a microphone, a joystick, and the like.

The processor 1200 is responsible for managing the bus architecture and general processing, and the memory 1220 can store data used by the processor 1200 in performing operations.

In summary, in the embodiment of the present invention, a seed frame structure is provided, which is composed of three parts, including an uplink control area, a downlink control area, and a data area. The uplink control area, the downlink control area and the data Reserve protection intervals between zones. The data area is dynamically divided into different data channels, and the guard intervals are reserved in the frequency domain between the data channels.

Further, in the data transmission area of the same subframe, data transmission in multiple transmission modes may be performed in parallel, including uplink, downlink, or direct transmission, and uplink transmission refers to a common node in the cluster to a cluster head (or an access point). The transmission, the downlink transmission refers to the transmission of the cluster head (or called the access point) to the ordinary node in the cluster, and the direct transmission refers to the transmission between the ordinary nodes.

Further, for the feedback transmission mode, the data structure of the data channel includes a “transmission parameter+reference symbol” area, a “data transmission block” area, a GAP area, and an ACK/NACK feedback area. For the non-feedback data transmission mode, the data area is composed of a "reference symbol" area and a "data transmission block" area.

The frame structure design introduced in the embodiment of the present invention introduces great flexibility, so that the traffic of various transmission modes and transmission directions can be well adapted, the utilization of air interface resources is improved, and the waiting delay of data transmission is reduced.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) including computer usable program code.

The present invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

These computer program instructions can also be stored in a bootable computer or other programmable data processing device. In a computer readable memory that operates in a particular manner, causing instructions stored in the computer readable memory to produce an article of manufacture comprising an instruction device implemented in one or more flows and/or block diagrams of the flowchart The function specified in the box or in multiple boxes.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

It is apparent that those skilled in the art can make various modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims

A data transmission method, comprising:

Determining a data frame structure, the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and transmitting on the data channel resource a data area of the data, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

Data is transmitted in accordance with the data frame.
The method of claim 1 wherein said data channel is configured in one of the following ways or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

Each data channel occupies an integer number of physical resource blocks in the frequency domain;

The number and/or bandwidth of the data channels are dynamically configured according to the amount of data transmission in each transmission direction of the current subframe.
The method according to claim 2, wherein the number and/or bandwidth of the data channels are dynamically configured according to the amount of data transmission in each transmission direction of the current subframe, which is configured by the cluster head node.
The method according to claim 1, wherein the data of the data area comprises: a data transmission block, the transmission parameter of the data transmission block is determined before transmission, and the confirmation information is controlled by the media access control MAC Confirmation/negative acknowledgement of the packet data unit PDU to confirm the ACK/NACK acknowledgement mechanism;

Or, the data of the data area includes: a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.
The method according to claim 4, wherein when the data of the data area includes a transmission parameter indication portion, a data transmission block portion, and an ACK/NACK portion, further comprising: time Interval GAP part.
The method of claim 1 wherein each data channel transmits data using an orthogonal multiple access method or a non-orthogonal multiple access method.
The method of claim 1, wherein the scheduling request information comprises one or a combination of the following information:

Scheduling request information sent by the end node to the cluster head node during data transmission;

Scheduling request information sent by the end node to the cluster head node during device-to-device D2D data transmission;

Random access resource information configured by the cluster head node during the initial connection establishment process.
The method of claim 1, wherein the data channel resource allocation information comprises one or a combination of the following information:

The cluster head node is data channel resource information allocated by the end node to the cluster head node for uplink transmission;

The cluster head node is data channel resource information allocated by the cluster head node to the end node for downlink transmission;

The cluster head node is data channel resource information allocated for D2D transmission between the end node and the end node.
A data transmission device, comprising:

a determining module, configured to determine a data frame structure, where the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and a data area for transmitting data on the data channel resource, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

a transmission module, configured to transmit data according to the data frame.
The apparatus of claim 9, wherein the determining module is further configured to configure the data channel in one of the following ways or a combination thereof:

Different data channel frequencies;

Dynamic configuration of each data channel bandwidth;

A guard interval is reserved in the frequency domain between data channels;

Each data channel occupies an integer number of physical resource blocks in the frequency domain;

The number and/or bandwidth of the data channels are dynamically configured according to the amount of data transmission in each transmission direction of the current subframe.
The apparatus according to claim 10, wherein the determining module is further configured to dynamically configure the number and/or bandwidth of the data channels by the cluster head node according to the data transmission amount in each transmission direction of the current subframe.
The apparatus according to claim 9, wherein the transmission module is further configured to transmit data according to the data frame, wherein the data of the data area comprises: a data transmission block, and a transmission parameter of the data transmission block is The acknowledgment information is confirmed by the ACK/NACK acknowledgment mechanism based on the MAC PDU, or the data of the data area includes: a transmission parameter indication part, a data transmission block part, and an ACK/NACK part.
The apparatus according to claim 12, wherein the transmission module is further configured to transmit data in the data frame, wherein the data in the data area includes a transmission parameter indication portion, a data transmission block portion, and an ACK/NACK portion Further, it includes: the GAP part.
The apparatus of claim 9, wherein the transmission module is further configured to transmit data in each of the data channels using an orthogonal multiple access mode or a non-orthogonal multiple access mode.
The apparatus according to claim 9, wherein the determining module is further configured to: when determining the uplink control region, determine that the scheduling request information comprises one or a combination of the following information:

Scheduling request information sent by the end node to the cluster head node during data transmission;

Scheduling request information sent by the end node to the cluster head node during D2D data transmission;

Random access resource information configured by the cluster head node during the initial connection establishment process.
The apparatus according to claim 9, wherein the determining module is further configured to: when determining the downlink control region, determine that the data channel resource allocation information comprises one or a combination of the following information:

The cluster head node is data channel resource information allocated by the end node to the cluster head node for uplink transmission;

The cluster head node is data channel resource information allocated by the cluster head node to the end node for downlink transmission;

The cluster head node is data channel resource information allocated for D2D transmission between the end node and the end node.
A data transmission device, comprising:

A processor for reading a program in the memory, performing the following process:

Determining a data frame structure, the data frame is composed of a plurality of consecutive subframes, each subframe includes: an uplink control region for transmitting scheduling request information, a downlink control region for transmitting data channel resource allocation information, and transmitting on the data channel resource a data area of the data, wherein a guard time interval is reserved between the uplink control area, the downlink control area, and the data area;

A transceiver for receiving and transmitting data under the control of a processor, performing the following processes:

Data is transmitted in accordance with the data frame.