CN112436931A

CN112436931A - Data communication method and device

Info

Publication number: CN112436931A
Application number: CN202011327359.1A
Authority: CN
Inventors: 刘靖; 杨水华; 郭浩
Original assignee: Beijing Cavige Technology Co ltd
Current assignee: Beijing Cavige Technology Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-03-02
Anticipated expiration: 2040-11-24
Also published as: CN112436931B

Abstract

The embodiment discloses a data communication method and device, and relates to the field of communication. Wherein, the method comprises the following steps: receiving a resource allocation signaling; blind detection is carried out on the resource allocation signaling; and when the resource allocation signaling is successfully identified through the blind detection, completing the receiving/sending of the data packet to be transmitted according to the resource allocation signaling. By adopting the method, the change of resource allocation can be identified, the time delay is shortened, and the communication efficiency is improved.

Description

Data communication method and device

Technical Field

The present disclosure relates to the field of communications, and in particular, to a data communication method and apparatus.

Background

High-speed data buses are widely used in the fields of aerospace, weaponry, etc., and these bus technologies have higher requirements in terms of reliability and latency than conventional civilian communication systems. Some mature technical standards include: the very early MIL-STD-1553B standard, the FC-AE-1553 draft based on optical fiber, the AFDX standard of Ethernet, etc.

In the prior art, nodes for near field communication are generally fewer, and an available bandwidth is larger, for example, an available frequency band of 100MHz may exist in a millimeter wave band, that is, a frequency band resource for near field communication is rich. But in the field of aerospace electronics, the requirement on time delay is high; generally, a wireless communication system based on multiple carriers organizes data transmission by data frames, that is, at least the space-time resource of one data frame is occupied in one transmission, so this also means that the transmission delay of the system cannot be smaller than one frame; when signaling is transmitted, several OFDM symbols are generally reserved for signaling indication, which means that transmission delay is increased, and thus shorter delay cannot be provided, and transmission efficiency and accuracy are greatly reduced; therefore, a communication method for reducing the delay is needed.

Disclosure of Invention

In view of the above technical problems in the prior art, the embodiments of the present disclosure provide a data communication method and apparatus, which can solve the problems of long transmission delay, low transmission efficiency, low accuracy and the like in the prior art.

A first aspect of an embodiment of the present disclosure provides a data communication method, including:

receiving a resource allocation signaling;

blind detection is carried out on the resource allocation signaling;

and when the resource allocation signaling is successfully identified through the blind detection, completing the receiving/sending of the data packet to be transmitted according to the resource allocation signaling.

In some embodiments, blind detection of the resource allocation signaling specifically comprises: and carrying out blind detection on the resource allocation signaling through different carrier wave intervals.

In some embodiments, the different carrier spacings comprise at least a wide carrier spacing and/or a normal carrier spacing.

In some embodiments, the different carrier spacings comprise white spaces therebetween.

In some embodiments, the method further comprises: the resource allocation signaling also includes the configuration condition of one or more NT nodes in an uplink frame.

In some embodiments, the method further comprises: if the resource allocation signaling only includes the configuration condition of one NT node in the uplink frame, the NT node can change the resource allocation signaling and inform the NC node.

In some embodiments, the method further comprises: and if the resource allocation signaling comprises the configuration conditions of a plurality of NT nodes in an uplink frame, configuring protection resources in the resource allocation signaling.

A second aspect of an embodiment of the present disclosure provides a data communication apparatus, including:

a receiving module, configured to receive a resource allocation signaling;

the blind detection module is used for carrying out blind detection on the resource allocation signaling;

and the data packet processing module is used for completing the receiving/sending of the data packet to be transmitted according to the resource allocation signaling when the resource allocation signaling is successfully identified through the blind detection.

In some embodiments, the blind detection module is configured to blindly detect the resource allocation signaling over different carrier spacings.

In some embodiments, the resource allocation signaling further includes a configuration status of one or more NT nodes in an uplink frame.

A third aspect of the embodiments of the present disclosure provides an electronic device, including:

a memory and one or more processors;

wherein the memory is communicatively coupled to the one or more processors, and the memory stores instructions executable by the one or more processors, and when the instructions are executed by the one or more processors, the electronic device is configured to implement the method according to the foregoing embodiments.

A fourth aspect of the embodiments of the present disclosure provides a computer-readable storage medium having stored thereon computer-executable instructions, which, when executed by a computing device, may be used to implement the method according to the foregoing embodiments.

A fifth aspect of embodiments of the present disclosure provides a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, are operable to implement a method as in the preceding embodiments.

The beneficial effects of the embodiment of the disclosure are: by performing blind detection on the received resource allocation signaling and receiving/sending the data packet to be transmitted according to the blind detection result and the resource allocation signaling, the change of resource allocation can be identified, the time delay is shortened, and the communication efficiency is improved.

Drawings

The features and advantages of the present disclosure will be more clearly understood by reference to the accompanying drawings, which are illustrative and not to be construed as limiting the disclosure in any way, and in which:

FIG. 1 is a schematic diagram of a data frame structure composition, shown in accordance with some embodiments of the present disclosure;

FIG. 2 is a schematic diagram of a short data frame structure composition, according to some embodiments of the present disclosure;

FIG. 3 is a flow chart of a method of data communication, shown in accordance with some embodiments of the present disclosure;

FIG. 4 is a diagram of a specific example of a method of data communication, shown in accordance with some embodiments of the present disclosure;

FIG. 5 is a diagram of a specific example of a method of data communication, shown in accordance with some embodiments of the present disclosure;

FIG. 6 is a diagram of a specific example of a method of data communication, shown in accordance with some embodiments of the present disclosure;

FIG. 7 is a schematic block diagram of a data communication device according to some embodiments of the present disclosure;

FIG. 8 is a schematic structural diagram of an electronic device in accordance with some embodiments of the present disclosure.

Detailed Description

In the following detailed description, numerous specific details of the disclosure are set forth by way of examples in order to provide a thorough understanding of the relevant disclosure. However, it will be apparent to one of ordinary skill in the art that the present disclosure may be practiced without these specific details. It should be understood that the use of the terms "system," "apparatus," "unit" and/or "module" in this disclosure is a method for distinguishing between different components, elements, portions or assemblies at different levels of sequence. However, these terms may be replaced by other expressions if they can achieve the same purpose.

It will be understood that when a device, unit or module is referred to as being "on" … … "," connected to "or" coupled to "another device, unit or module, it can be directly on, connected or coupled to or in communication with the other device, unit or module, or intervening devices, units or modules may be present, unless the context clearly dictates otherwise. For example, as used in this disclosure, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to limit the scope of the present disclosure. As used in the specification and claims of this disclosure, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are inclusive in the plural, unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" are intended to cover only the explicitly identified features, integers, steps, operations, elements, and/or components, but not to constitute an exclusive list of such features, integers, steps, operations, elements, and/or components.

These and other features and characteristics of the present disclosure, as well as the methods of operation and functions of the related elements of structure and the combination of parts and economies of manufacture, will be better understood by reference to the following description and drawings, which form a part of this specification. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the disclosure. It will be understood that the figures are not drawn to scale.

Various block diagrams are used in this disclosure to illustrate various variations of embodiments according to the disclosure. It should be understood that the foregoing and following structures are not intended to limit the present disclosure. The protection scope of the present disclosure is subject to the claims.

In the prior art, a wireless communication system based on multiple carriers organizes data transmission by data frames, that is, at least the space-time resource of one data frame is occupied in one transmission, which also means that the transmission delay of the system cannot be smaller than one frame. Further, a multi-user scheduling system requires a scheduling signaling to indicate the resource where each user transmits; as shown in fig. 1, one data frame includes 10 data frames, where the first OFDM symbol (OFDM # 1) is scheduling signaling; resources of a plurality of NT (Network termination) nodes (hereinafter referred to as NTs) (e.g., NT1-NT 3) are allocated on different carriers. This means that, assuming that the duration of one OFDM symbol is Ts + Tcp (where Ts is the symbol length and Tcp is the length of the cyclic shift), the delay of one transmission is not less than 10 (Ts + Tcp). However, this delay is still too high at this point relative to other low delay transmissions.

In the 5G communication system defined by 3GPP, it allows one frame to flexibly use different numbers of OFDM, thereby reducing transmission delay. For example, if a short data frame only occupies one OFDM symbol, and a part of the carriers are used for transmitting scheduling signaling and the other carriers are used for transmitting data, the transmission delay can be reduced to Ts + Tcp, as shown in fig. 2. Using a frame of a single OFDM symbol can reduce the transmission delay, however, it also means that the delay cannot be further compressed, since the length of the single OFDM symbol is typically fixed. For low latency and highly reliable communication systems, the latency requirements for the transmission of some small data are as small as possible. The method in fig. 2 cannot further shorten the transmission delay, the transmission efficiency is reduced, and the accuracy is greatly reduced; therefore, a low-latency data communication method is needed.

An embodiment of the present disclosure provides a data communication method, as shown in fig. 3, specifically including:

s101, receiving a resource allocation signaling;

s102, carrying out blind detection on the resource allocation signaling;

s103, when the resource allocation signaling is successfully identified through the blind detection, the receiving/sending of the data packet to be transmitted is completed according to the resource allocation signaling.

In general, the symbol length and carrier spacing of OFDM satisfy

In which

Is the length of the OFDM symbol and,

is the carrier spacing and is therefore larger

Meaning shorter symbol lengths; however, a shorter symbol length also means more CP (Cyclic Prefix) overhead, so that a particularly short symbol length is not selected in a general OFDM system, but in a low-latency system to which the present invention is applied, spectrum resources are rich, and transmission of some small data packets may need as low latency as possible.

Specifically, different carrier spacings may be used for data transmission within one frame, and the carrier spacings need to satisfy a multiple increase relationship with each other, for example, a common carrier spacing is 15kHz, and other carrier spacings are 30kHz, 60kHz, and the like.

Further, the symbols with wide carrier spacing occupy at least the first N OFDM symbols of one frame; at this time, at the first N symbols of a frame, the transmission delay will be shortened, but if the same length of CP is maintained, it means that a certain blank transmission phase, i.e. blank interval, needs to be reserved to keep the length of the whole frame unchanged. In specific transmission, if the wide carrier symbol needs a signaling indication in advance, this means that the delay is long, so that it is necessary to support the sending end (NC node) to change the configuration of the frame at any time, and the receiving end can recognize the transmission. The specific sending and receiving flows are as follows:

in some embodiments, if a short-delay data packet to be transmitted reaches the NC node, the NC node configures the first N frames as wide carrier frames as needed, and sends a resource allocation signaling at the first symbol.

Further, the NT node will perform blind detection of different frame configurations in the first frame, and will attempt to detect the resource allocation signaling according to different carrier spacings; and when the detection of the wide carrier wave is successful, the detection, the receiving and the sending of the whole data packet are completed according to the configuration information.

As shown in FIG. 4, the NC node sends packets to NT1 node and NT2 node, where NT1 node sends using a wide carrier spacing, meaning 3 short OFDM (e.g., 3 short OFDM)

The symbol of =30kHz transmits data of NT1 node, and data of NT2 node is followed by 7 normal OFDM symbols (e.g., OFDM symbol)

=15 kHz).

Further, both the NT1 node and the NT2 node perform blind detection, i.e., perform blind detection on the resource allocation signaling through different carrier spacings, i.e., attempt to detect short symbols and normal symbols. The NT1 node and the NT2 node successfully recognize the configuration signal in the short symbol, so the NT2 node starts signal detection after the blank interval ends, and the NT1 completes reception of its own data by using the short OFDM symbol. The blank interval is generated because at the short OFDM symbol, the length of the CP still needs to be the same as that of the common symbol CP, which means that the CP ratio of 3 short OFDM symbols is increased, and one common OFDM symbol needs to be wasted to maintain the fixed length of the whole frame; meanwhile, the blank interval is also beneficial to switching by using processing modules with different symbol lengths. For example, NT1 may also receive other packets at the same time at normal OFDM symbols (OFDM #4-OFDM # 10).

In some embodiments, the method further comprises: the resource allocation signaling also includes the configuration condition of one or more NT nodes in the current uplink frame.

In some embodiments, the method further comprises: if the resource allocation signaling only includes the configuration condition of one NT node in the current uplink frame, the NT node can change the resource allocation signaling and inform the NC node.

In some embodiments, the method further comprises: and if the resource allocation signaling comprises the configuration conditions of a plurality of NT nodes in the current uplink frame, configuring protection resources in the resource allocation signaling.

Specifically, for an upstream frame, i.e., when a packet to be transmitted arrives at the NT node, the NT node cannot directly change the configuration of the current frame because it is possible that multiple NT nodes also occupy the frame. At this time, the NC node may broadcast the configuration of all NT nodes of the current uplink frame in the downlink configuration signaling. When one NT node identifies that the current frame is only configured, the current frame can be directly reconstructed; if the NT node recognizes that there are other NT nodes in the current frame, a short symbol may be used on the frequency resources configured by the NC node. The configuration resource can be configured in advance by the NC node, and a null carrier is configured as a guard band.

As shown in fig. 5, only the NT1 node is configured with uplink transmission in the current frame, the NT1 node transmits using short OFDM symbols with wide carrier spacing, and transmits the modified resource allocation signaling to the NC node in the first symbol; the NC node performs blind detection on the received resource allocation signaling, and identifies that the NT1 node selects a short OFDM symbol from the resource allocation signaling for transmission; since NT2 node is not configured to transmit, the short symbol transmission of NT1 node does not cause any inter-carrier interference.

As shown in fig. 6, both NT1 node and NT2 node have uplink transmissions at the current frame. However, delay-sensitive traffic arrives at the NT1 node, so the NT1 node chooses to perform short symbol transmission on the reserved resources (upper left side of fig. 6), and 2 guard carriers are configured between the reserved resources and the common resources. The NT2 node still transmits on the normal symbols scheduled by the NC node. Due to the use of different symbol lengths, the transmission of the NT1 node will leak a certain amount of interference to adjacent carriers, but with guard carriers, the interference is small, and therefore, the normal reception/transmission data of the NT2 node signal is not affected. It should be noted that, when the NC node schedules the NT1 node and the NT2 node, the NC node simultaneously configures common resources and short symbol resources to avoid interference; although a certain amount of spectrum resources are wasted by the configuration, the transmission delay of the emergency service can be greatly reduced.

The embodiment of the disclosure discloses a data communication method, which ensures the number of subcarriers on one hand by planning the subcarriers with smaller intervals, namely enhancing the flexibility of subcarrier planning by reducing the granularity of the subcarriers; on the other hand, the minimum message transmission delay is compressed, and the real-time performance of the communication system is improved.

The embodiment of the present disclosure further provides a data communication apparatus 200, as shown in fig. 7, including:

a receiving module 201, configured to receive a resource allocation signaling;

a blind detection module 202, configured to perform blind detection on the resource allocation signaling;

Referring to fig. 8, a schematic diagram of an electronic device provided for an embodiment of the present disclosure, the electronic device 600 includes:

memory 630 and one or more processors 610;

wherein the memory 630 is communicatively coupled to the one or more processors 610, the memory 630 having stored therein instructions 632 executable by the one or more processors 610, the instructions 632 being executable by the one or more processors 610 to cause the one or more processors 610 to perform the methods of the foregoing embodiments of the disclosure.

Specifically, the processor 610 and the memory 630 may be connected by a bus or other means, such as a bus 640. Processor 610 may be a Central Processing Unit (CPU). The Processor 610 may also be other general purpose processors, Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components, or combinations thereof.

The memory 630, as a non-transitory computer readable storage medium, may be used to store non-transitory software programs, non-transitory computer executable programs, and modules, such as the cascaded progressive network in the embodiments of the present disclosure. The processor 610 executes various functional applications of the processor and data processing by executing non-transitory software programs, instructions, and modules 632 stored in the memory 630.

The memory 630 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created by the processor 610, and the like. Further, the memory 630 may include high speed random access memory, and may also include non-transitory memory, such as at least one magnetic disk storage device, flash memory device, or other non-transitory solid state storage device. In some embodiments, memory 630 optionally includes memory located remotely from processor 610, which may be connected to processor 610 via a network, such as through communications interface 620. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.

An embodiment of the present disclosure also provides a computer-readable storage medium, in which computer-executable instructions are stored, and the computer-executable instructions are executed to perform the method in the foregoing embodiment of the present disclosure.

The foregoing computer-readable storage media include physical volatile and nonvolatile, removable and non-removable media implemented in any manner or technology for storage of information such as computer-readable instructions, data structures, program modules or other data. The computer-readable storage medium specifically includes, but is not limited to, a USB flash drive, a removable hard drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), an erasable programmable Read-Only Memory (EPROM), an electrically erasable programmable Read-Only Memory (EEPROM), flash Memory or other solid state Memory technology, a CD-ROM, a Digital Versatile Disk (DVD), an HD-DVD, a Blue-Ray or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer.

While the subject matter described herein is provided in the general context of execution in conjunction with the execution of an operating system and application programs on a computer system, those skilled in the art will recognize that other implementations may also be performed in combination with other types of program modules. Generally, program modules include routines, programs, components, data structures, and other types of structures that perform particular tasks or implement particular abstract data types. Those skilled in the art will appreciate that the subject matter described herein may be practiced with other computer system configurations, including hand-held devices, multiprocessor systems, microprocessor-based or programmable consumer electronics, minicomputers, mainframe computers, and the like, as well as distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote memory storage devices.

Those of ordinary skill in the art will appreciate that the various illustrative elements and method steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present disclosure.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure.

In summary, the present disclosure provides a data communication method, an apparatus, an electronic device and a computer-readable storage medium thereof. By performing blind detection on the received resource allocation signaling and receiving/sending the data packet to be transmitted according to the blind detection result and the resource allocation signaling, the change of resource allocation can be identified, the time delay is shortened, and the communication efficiency is improved.

It is to be understood that the above-described specific embodiments of the present disclosure are merely illustrative of or illustrative of the principles of the present disclosure and are not to be construed as limiting the present disclosure. Accordingly, any modification, equivalent replacement, improvement or the like made without departing from the spirit and scope of the present disclosure should be included in the protection scope of the present disclosure. Further, it is intended that the following claims cover all such variations and modifications that fall within the scope and bounds of the appended claims, or equivalents of such scope and bounds.

Claims

1. A method of data communication, comprising:

receiving a resource allocation signaling;

blind detection is carried out on the resource allocation signaling;

2. The method of claim 1, wherein the blind detection of the resource allocation signaling specifically comprises: and carrying out blind detection on the resource allocation signaling through different carrier wave intervals.

3. The method according to claim 2, wherein the different carrier spacings comprise at least wide carrier spacings and/or normal carrier spacings.

4. The method of claim 2, wherein the different carrier spacings comprise blanking intervals therebetween.

5. The method of claim 1, wherein the resource allocation signaling further comprises configuration of one or more NT nodes in an uplink frame.

6. The method of claim 5, further comprising: if the resource allocation signaling only includes the configuration condition of one NT node in the uplink frame, the NT node can change the resource allocation signaling and inform the NC node.

7. The method of claim 5, further comprising: and if the resource allocation signaling comprises the configuration conditions of a plurality of NT nodes in an uplink frame, configuring protection resources in the resource allocation signaling.

8. A data communication apparatus, comprising:

a receiving module, configured to receive a resource allocation signaling;

9. The apparatus of claim 8, wherein the blind detection module is configured to blindly detect the resource allocation signaling with different carrier spacings.

10. The apparatus of claim 8, wherein the resource allocation signaling further comprises configuration of one or more NT nodes in an uplink frame.