CN114710806B - Low-delay transmission method and device for control command - Google Patents
Low-delay transmission method and device for control command Download PDFInfo
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- CN114710806B CN114710806B CN202210404133.XA CN202210404133A CN114710806B CN 114710806 B CN114710806 B CN 114710806B CN 202210404133 A CN202210404133 A CN 202210404133A CN 114710806 B CN114710806 B CN 114710806B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/0273—Traffic management, e.g. flow control or congestion control adapting protocols for flow control or congestion control to wireless environment, e.g. adapting transmission control protocol [TCP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W56/00—Synchronisation arrangements
- H04W56/004—Synchronisation arrangements compensating for timing error of reception due to propagation delay
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Abstract
The application discloses a low-delay transmission method of control commands, which comprises the following steps: firstly, NR receives URLLC business data packets, processes the URLLC business data packets and sends the URLLC business data packets to UE; step two, UE receives URLLC service data and prepares for data reception according to the service information; step three, the UE continuously receives the data signals and performs joint decoding on the received data signals; step four, the UE returns a decoding result to the NR; and fifthly, the physical layer reports the decoding result to the upper layer after the NR receives the decoding result. The application has the beneficial effects that: the low-delay transmission method of the control command provided by the application transmits the data by adopting a semi-dynamic transmission mode, and performs joint decoding on the data packets of different time nodes by adopting a joint decoding mode, thereby improving the transmission efficiency, ensuring the transmission reliability and solving the problems of data delay and service conflict in the prior art.
Description
Technical Field
The application relates to the technical field of data transmission, in particular to a low-delay transmission method and device for control commands.
Background
With the development and progress of technology, 5g technology is gradually integrated into various fields of people's production and life, and in order to improve the working performance of a power station, 5g technology is also introduced into a photovoltaic power station. The data transmission between NR and UE in the photovoltaic power station has higher requirements on delay and reliability.
In the existing transmission mode, the NR needs to reserve enough resources for each CPE, and the frequency of the reserved resources of the NR is increased due to the burstiness of the control command, so that the utilization rate of the NR resources is not high, and the requirement of low delay cannot be met better. In addition, the UE needs to transmit the eMBB service data and the control command data with the URLLC characteristic, and the burstiness of the two service data often causes the UE to process the two service data simultaneously, which places a large burden on the UE end.
Disclosure of Invention
The application aims at the problems existing in the prior art and provides a low-delay transmission method and device for control commands.
In order to achieve the above purpose, the application is realized by the following technical scheme:
a low-delay transmission method for control commands comprises the following steps:
firstly, NR receives URLLC business data packets, processes the URLLC business data packets and sends the URLLC business data packets to UE;
step two, UE receives URLLC service data and prepares for data reception according to the service information;
step three, the UE continuously receives the data signals and performs joint decoding on the received data signals;
step four, the UE returns a decoding result to the NR;
and fifthly, the physical layer reports the decoding result to the upper layer after the NR receives the decoding result.
Further, in the first step, the URLLC service data packet is processed to generate PDCCH signaling, and a certain number of HARQ data packets are generated according to the physical layer higher layer configuration requirement.
Further, the PDCCH signaling carries a URLLC service type indication, a semi-dynamic transmission indication, and frequency domain resources of the URLLC service, and the HARQ data includes PDSCH signaling and corresponding dm_rs information.
Further, the step PDCCH signaling carries a frequency domain resource for transmitting a data packet, and the HARQ data packet carries PDSCH signaling and corresponding dm_rs information.
Further, in the first step, the URLLC service data packet is processed, the physical layer demodulates the PDSCH by using the dm_rs dedicated for the URLLC service configured by NR, the physical layer high-level configuration requires to generate a certain number of HARQ data packets, the HARQ data packet is generated according to the requirement, and the PDSCH and the corresponding dm_rs information are mapped into the frequency domain resource set configured by the high-level.
Further, in the second step, the UE receives the PDCCH signaling and performs decoding analysis on the PDCCH signaling to obtain that the subsequent HARQ packet is semi-dynamically scheduled, and the UE is ready for data reception.
Further, in the second step, the UE receives the PDCCH signaling and the HARQ packet, decodes and analyzes the PDCCH signaling and the HARQ packet, and then obtains the frequency domain resource occupied by the ullc service data and obtains that the dm_rs is the dedicated dm_rs for the ullc service, and determines that the HARQ packet of the subsequent time slot is semi-dynamic scheduling according to the configuration of the higher layer.
Further, in the second step, after receiving the dm_rs, the UE learns that the dm_rs is dedicated to the URLLC service, and learns that the subsequent HARQ packet is semi-dynamic scheduling according to the frequency domain resources configured by the higher layer.
Further, the versions of the data packets transmitted in each time slot or subframe received by the UE in the third step may be the same or different.
The control command transmission device comprises core network equipment, wherein the core network equipment is connected with a plurality of access equipment, each access equipment is connected with a plurality of clients, the core network transmits service new information to the access equipment, the access equipment transmits the information to the clients in a semi-dynamic transmission mode, and the clients receive the information and make feedback.
The application has the beneficial effects that: the low-delay transmission method of the control command provided by the application transmits the data by adopting a semi-dynamic transmission mode, and performs joint decoding on the data packets of different time nodes by adopting a joint decoding mode, thereby improving the transmission efficiency, ensuring the transmission reliability and solving the problems of data delay and service conflict in the prior art.
Drawings
Fig. 1 is a flow chart of a low-delay transmission method of control commands according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments of the present application.
All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.
It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other. The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in 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 computer storage media including memory storage devices.
In the present application, "module," "system," and the like refer to a related entity, either hardware, a combination of hardware and software, or software in execution, as applied to a computer. In particular, for example, an element may be, but is not limited to being, a process running on a processor, an object, an executable, a thread of execution, a program, and/or a computer. Also, the application or script running on the server, the server may be an element. One or more elements may be in processes and/or threads of execution, and elements may be localized on one computer and/or distributed between two or more computers, and may be run by various computer readable media. The elements may also communicate by way of local and/or remote processes in accordance with a signal having one or more data packets, e.g., a signal from one data packet interacting with another element in a local system, distributed system, and/or across a network of the internet with other systems by way of the signal.
Finally, it is also noted that, in this document, the terms "comprises," comprising, "and" includes not only those elements but also other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other like elements in a process, method, article or apparatus that comprises the element.
Example 1
After the UE enters the RRC-Connected state, the content of the NR when configuring the resource to the UE includes the following physical layer transmission information, where the information content specifically includes: (1) Downlink air interface physical layer signaling search space needed by URLLC service; (2) The number of subframes or time slots or symbols scheduled continuously; (3) Whether ACK is fed back after the UE receives the ACK, and whether NACK is fed back after the UE receives the NACK; (4) the format of DM-RS corresponding to URLLC service; (5) Whether a low priority HARQ process can be preempted or any one or several of the HARQ process numbers that can be preempted and emptied.
Referring to fig. 1, a low-delay transmission method of a control command provided by the present application includes:
firstly, NR receives URLLC business data packets, processes the URLLC business data packets and sends the URLLC business data packets to UE;
step two, UE receives URLLC service data and prepares for data reception according to the service information;
step three, the UE continuously receives the data signals and performs joint decoding on the received data signals;
step four, the UE returns a decoding result to the NR;
and fifthly, the physical layer reports the decoding result to the upper layer after the NR receives the decoding result.
After receiving the URLLC service data packet, the NR in the first step generates PDCCH signaling through SDAP/PDCP/RLC/MAC processing. The physical layer high-level configuration requires that a certain number of HARQ data packets are generated, and the HARQ data packets are generated according to the requirement.
In this embodiment, the physical layer high-level configuration requires three HARQ packets to be generated, and the generation of the three HARQ packets is performed by using a coding redundancy method.
In this embodiment, PDCCH signaling carries a ullc service type indication, a semi-dynamic transmission indication, and frequency domain resources of the ullc service. The corresponding time slot or subframe of the HARQ data packet does not carry PDCCH signaling content any more and only contains PDSCH signaling and corresponding DM_RS information.
In the second step, the UE receives and decodes the PDCCH signaling, and obtains that the following three HARQ data packets are ready for data reception after semi-dynamic scheduling after decoding analysis. The specific treatment process is as follows:
in the T0 time slot, the UE receives the PDCCH signaling and decodes the PDCCH signaling, and any one of information of a URLLC service instruction, a semi-dynamic sending instruction, a subsequent continuous transmission time slot or the number of subframes carried by the PDCCH signaling is obtained after decoding. The UE determines from the above information that the subsequent slot subframe is a hybrid redundancy transmission of the MAC layer packet, and the UE is ready to receive the subsequent data, e.g., memory space, decoder, etc.
In the third step, the UE continuously and sequentially receives PDSCH signals of T0, T1, T2 slots or subframes. The versions of the data packets transmitted by the time slots or the subframes can be the same or different, and the process of receiving and processing the data is as follows:
the UE firstly receives the PDSCH signal corresponding to the T0 time slot, decodes the signal, performs CRC after decoding, sends the data packet to the MAC layer if the CRC is correct, and waits for the PDSCH signal corresponding to the T1 time slot or the subframe if the CRC is incorrect.
After receiving the PDSCH signal corresponding to the T1 time slot or subframe, the UE performs joint decoding on the PDSCH signal corresponding to the T1 time slot or subframe and the PDSCH signal corresponding to the T0 time slot, performs CRC check after joint decoding, and if the CRC check is correct, sends the data packet to the MAC layer, and if the CRC check is incorrect, continues to wait for the PDSCH signal corresponding to the T2 time slot.
After receiving the PDSCH signal corresponding to the T2 slot, the UE performs joint decoding on the PDSCH signal corresponding to the T2 slot, the PDSCH signal corresponding to the T1 slot or the subframe, and the PDSCH signal corresponding to the T0 slot, performs CRC check after joint decoding, and if the CRC check is correct, sends the data packet to the MAC layer, and if the CRC check is still incorrect, the semi-dynamic scheduling reception fails.
Similarly, the UE may continuously receive a plurality of data packets for joint decoding, and the number of the data packets is determined according to actual needs, which is not limited herein.
In the fourth step, when the semi-dynamic scheduling is successful, if the FDD transmission mode is adopted, the UE feeds back an ACK signal to the NR in the T3 slot or subframe, and if the TDD transmission mode is adopted, the UE feeds back an ACK signal to the NR in the first uplink slot after the continuous downlink transmission is completed. And when the semi-dynamic scheduling is failed to receive, the UE transmits a NACK signal to NR at the time node or does not feed back according to the configuration of RRC.
In the fifth step, the NR starts to receive the ACK or NACK signal of the UE in the T3 time slot, and when the NR receives the ACK signal, the NR indicates that the data transmission is successful, and the physical layer reports the successful transmission of the data packet to the upper layer; when the NR receives the NACK signal or does not receive any signal, the NR indicates that the data transmission fails, and the physical layer reports the failure of the data packet transmission to the upper layer. And after the transmission fails, if the NR configuration information indicates that the data packet needs to be semi-dynamically scheduled again, repeating the process, and if no request exists, ending the transmission.
Example 2
After receiving the URLLC service data packet, the NR generates PDCCH signaling through SDAP/PDCP/RLC/MAC processing, and the physical layer high-layer configuration requires to generate a certain number of HARQ data packets, and generates the HARQ data packets according to the requirement.
In this embodiment, the PDCCH signaling carries the frequency domain resource sent by the data packet, and the timeslot or subframe corresponding to the HARQ data packet only carries the PDSCH signaling and the corresponding dm_rs information, and does not carry the PDCCH signaling content any more.
In the second step, the UE receives the PDCCH signaling and the HARQ data packet, decodes and analyzes the PDCCH signaling and the HARQ data packet, obtains the frequency domain resources occupied by the URLLC service data and that the DM_RS is the DM_RS special for the URLLC service, and determines that the HARQ data packet of the subsequent time slot is semi-dynamic scheduling according to the configuration of a high layer. The specific process is as follows:
in the T0 slot, the UE receives the PDCCH and the dm_rs, acquires the frequency domain resource occupied by the URLLC service data according to the PDCCH, and determines the number of subsequent continuous transmission slots or subframes according to the format of the dm_rs, for example: dm_rs format 1 is transmitted 3 times consecutively, RV version is 1,4,2, dm_rs format 2 is transmitted 4 times consecutively, RV version is 1,3,2,4. The UE determines that the subsequent slot or subframe is a hybrid redundancy transmission of a MAC layer packet according to the above, and prepares corresponding resources, such as a memory space, a decoder, etc., accordingly.
Example 3
After receiving the URLLC service data packet, the physical layer demodulates the PDSCH by using the DM_RS special for the URLLC service configured by NR through SDAP/PDCP/RLC/MAC processing, and the physical layer high-layer configuration requires to generate a certain number of HARQ data packets, and the HARQ data packets are generated according to the requirement. PDSCH and corresponding dm_rs information are mapped into the set of frequency domain resources of the higher layer configuration.
In the second step, the UE acquires dm_rs dedicated for the URLLC service after receiving the dm_rs, and acquires the subsequent HARQ packet as semi-dynamic scheduling according to the frequency domain resources configured by the higher layer, which comprises the following specific procedures: in the T0 slot, the UE receives the dm_rs, determines the format of the dm_rs, and determines the subsequent consecutive transmission slots or the number of subframes according to the received dm_rs, for example, dm_rs format 1 is consecutive 3 times, RV version is 1,4,2, dm_rs format 2 is consecutive 4 times, and RV version is 1,3,2,4. The UE determines from the contents that the subsequent slot subframe is a hybrid redundancy transmission of a MAC layer packet. Resources such as memory space, decoders, etc., needed for HARQ processes where the UE is ready to receive these data.
A control command transmission device, characterized in that: the core network equipment is connected with a plurality of access equipment, each access equipment is connected with a plurality of clients, the core network sends service new information to the access equipment, the access equipment sends the information to the clients in a semi-dynamic sending mode, and the clients receive the information and feed back the information.
The foregoing is a further detailed description of the application in connection with the preferred embodiments, and it is not intended that the application be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the application, and these should be considered to be within the scope of the application.
Claims (5)
1. A method for low latency transmission of control commands, comprising:
firstly, NR receives URLLC business data packets, processes the URLLC business data packets and sends the URLLC business data packets to UE;
step two, UE receives URLLC service data and prepares for data reception according to the service information;
step three, the UE continuously receives the data signals and performs joint decoding on the received data signals;
step four, the UE returns a decoding result to the NR;
step five, after the NR receives the decoding result, the physical layer reports the decoding result to the upper layer;
in the first step, URLLC service data packets are processed to generate PDCCH signaling, and a certain number of HARQ data packets are generated according to the high-level configuration requirement of a physical layer;
the PDCCH signaling carries a URLLC service type indication, a semi-dynamic sending indication and frequency domain resources of the URLLC service, the HARQ data comprises a PDSCH signaling and corresponding DM_RS information, in the second step, the UE acquires the DM_RS which is special for the URLLC service after receiving the DM_RS, and acquires the follow-up HARQ data packet as semi-dynamic scheduling according to the frequency domain resources configured by a high layer.
2. The method for low-latency transmission of control commands according to claim 1, characterized in that: in the first step, the URLLC service data packet is processed, the physical layer demodulates the PDSCH by using the DM_RS special for the URLLC service of NR configuration, the physical layer high-level configuration requires to generate a certain number of HARQ data packets, the HARQ data packet is generated according to the requirement, and the PDSCH and the corresponding DM_RS information are mapped into the frequency domain resource set of the high-level configuration.
3. The method for low-latency transmission of control commands according to claim 1, characterized in that: in the second step, the UE may further receive the PDCCH signaling and perform decoding analysis on the PDCCH signaling to obtain that the subsequent HARQ packet is semi-dynamically scheduled, and the UE is ready for data reception.
4. A method for low latency transmission of control commands according to claim 3, characterized in that: in the second step, the UE receives the PDCCH signaling and the HARQ packet, decodes and analyzes the PDCCH signaling and the HARQ packet, and then obtains the frequency domain resources occupied by the ullc service data and obtains that the dm_rs is the dedicated dm_rs for the ullc service, and determines that the HARQ packet of the subsequent time slot is semi-dynamic scheduling according to the configuration of the higher layer.
5. The method for low-latency transmission of control commands according to claim 1, characterized in that: the versions of the data packets transmitted in each time slot or subframe received by the UE in the third step may be the same or different.
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| CN107210849A (en) * | 2015-01-23 | 2017-09-26 | Lg电子株式会社 | Method and apparatus of the transmitting/receiving means to the signal of device communication terminal in a wireless communication system |
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