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WO2017113175A1 - Procédé, appareil et système de transmission de données, et dispositif de communication - Google Patents

Procédé, appareil et système de transmission de données, et dispositif de communication Download PDF

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Publication number
WO2017113175A1
WO2017113175A1 PCT/CN2015/099839 CN2015099839W WO2017113175A1 WO 2017113175 A1 WO2017113175 A1 WO 2017113175A1 CN 2015099839 W CN2015099839 W CN 2015099839W WO 2017113175 A1 WO2017113175 A1 WO 2017113175A1
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WO
WIPO (PCT)
Prior art keywords
data
terminal
transmission
unicast
signaling
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2015/099839
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English (en)
Chinese (zh)
Inventor
余庆祥
张庆利
鲁志兵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hytera Communications Corp Ltd
Original Assignee
Hytera Communications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to PCT/CN2015/099839 priority Critical patent/WO2017113175A1/fr
Publication of WO2017113175A1 publication Critical patent/WO2017113175A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/02—Details
    • H04L12/16—Arrangements for providing special services to substations
    • H04L12/18—Arrangements for providing special services to substations for broadcast or conference, e.g. multicast

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a data transmission method, apparatus, system, and communication device.
  • the multicast service is implemented through the physical downlink shared channel (PDSCH). Since the multicast service implemented through the physical downlink shared channel has no uplink ACK/NACK feedback mechanism, the multicast data transmission in the terminal cannot be ensured. Received successfully.
  • PDSCH physical downlink shared channel
  • the existing solution relies on the HARQ mechanism to feed back ACK/NACK, so that any terminal in the transmission of multicast data, if it does not successfully receive the currently transmitted multicast data, feeds back NACK to trigger HARQ retransmission.
  • a data transmission method includes:
  • the data is transmitted to the terminal by the unicast transmission.
  • the signaling according to the terminal and the preset condition are in progress.
  • the steps of triggering the unicast transmission of the data in the multicast transmission of the line include:
  • Triggering a unicast transmission of the data Triggering a unicast transmission of the data.
  • the step of transmitting the data to the terminal by unicast transmission comprises:
  • the data is unicastly transmitted to the terminal through the unicast channel.
  • the method further includes:
  • the data transmission performed by the terminal is back-off from the unicast transmission to the multicast transmission according to the unicast user link state.
  • the method further includes:
  • a data transmission method including:
  • the signaling is reported to the base station.
  • the step of triggering generation of corresponding signaling according to the receiving condition comprises:
  • a data transmission device comprising:
  • the signaling receiving module is configured to receive, during the multicast transmission process of the data, the signaling reported by the terminal, where the signaling carries the unsuccessful reception of the data in the multicast transmission fed back by the terminal;
  • the unicast triggering module is configured to trigger unicast transmission of the data in the multicast transmission performed according to the signaling and preset conditions reported by the terminal;
  • a unicast transmission module configured to transmit the data to the terminal by the unicast transmission.
  • the unicast trigger module includes:
  • a bandwidth acquisition unit configured to acquire remaining system bandwidth
  • condition determining unit configured to determine, according to the preset upper layer configuration and the remaining system bandwidth, whether the preset condition is met
  • a unicast transmission triggering unit configured to trigger unicast transmission of the data when the condition determining unit determines to be YES.
  • the unicast delivery module includes:
  • a channel establishing unit configured to establish a unicast channel with the terminal
  • a unicast transmission unit configured to unicast and transmit the data to the terminal through the unicast channel during the multicast transmission that is performed.
  • the apparatus further includes:
  • a status receiving module configured to receive a unicast user link status, where the unicast user link status is reported by the terminal that performs unicast transmission;
  • the first back-off module is configured to roll back data transmission performed by the terminal to the multicast transmission according to the unicast user link state.
  • a data transmission device comprising:
  • a detecting module configured to detect a receiving status of data received in the multicast transmission
  • a status processing module configured to generate a corresponding signaling according to the receiving status, where the signaling carries unsuccessful receiving information of the data in the multicast transmission;
  • the reporting module is configured to report the signaling to the base station.
  • the status processing module includes:
  • the frame number determining unit is configured to determine whether the data that is not successfully demodulated in the data currently received by the terminal in the multicast terminal reaches a preset number of frames, and if yes, notify the signaling generating unit;
  • the signaling generating unit is configured to generate, to the base station, feedback signaling that the data in the multicast transmission is unsuccessfully received.
  • a data transmission system includes a base station and a terminal that communicates with the base station, where
  • the terminal is configured to report the corresponding signaling when the non-successful reception of the data transmitted by the base station by using the multicast;
  • the base station is configured to receive signaling reported by the terminal in the multicast transmission of the data, and the terminal feeds back the unsuccessful reception of the data in the multicast transmission by using the signaling;
  • the data is transmitted to the terminal by the unicast transmission.
  • a communication device comprising at least one processor, at least one mobile communication radio frequency component, a memory and at least one communication bus, wherein the memory stores program code, and the processor is configured to call program code stored in the memory for execution The following operations:
  • the data is transmitted to the terminal by the unicast transmission.
  • a communication device comprising at least one processor, at least one mobile communication radio frequency component, a memory and at least one communication bus, wherein the memory stores program code, and the processor is configured to call program code stored in the memory for execution The following operations:
  • the signaling is reported to the base station.
  • any terminal in the multicast group feeds back the signaling when the data is not successfully received, and the signaling carries the multicast fed back by the terminal.
  • the unsuccessful reception of the data in the transmission corresponding to the base station will receive the terminal report Signaling, triggering unicast transmission of data in the multicast transmission according to the signaling and preset conditions, and transmitting the data to the terminal that has not successfully received the data through unicast transmission, so that the multicast group is not successfully received.
  • the terminal of the data can also receive the data, ensuring the reliability of data reception.
  • the NACK feedback is not continuously performed, and only one signaling report is performed, thereby ensuring the transmission speed and reliability of the multicast.
  • FIG. 1 is a flow chart of a data transmission method in an embodiment
  • FIG. 2 is a flowchart of a method for triggering unicast transmission of data in a multicast transmission performed according to signaling and preset conditions reported by the terminal in FIG. 1;
  • 3 is a flow chart of a method for transmitting data to a terminal by unicast transmission
  • Figure 5 is a flow chart of a data transmission method in another embodiment
  • FIG. 6 is a flow chart of a data transmission method in another embodiment
  • FIG. 7 is a flowchart of a method for triggering generation of corresponding signaling according to a reception status in FIG. 6;
  • Figure 8 is a schematic structural diagram of a data transmission device in an embodiment
  • FIG. 9 is a schematic structural diagram of a unicast trigger module in FIG. 8.
  • FIG. 10 is a schematic structural diagram of a unicast transmission module of FIG. 8;
  • FIG. 11 is a schematic structural diagram of a data transmission device in another embodiment
  • Figure 12 is a block diagram showing the structure of a data transmission device in another embodiment
  • Figure 13 is a block diagram showing the structure of a data transmission device in an implementation
  • Figure 14 is a schematic structural view of the condition processing module of Figure 13;
  • FIG. 15 is a schematic structural diagram of a communication device according to an embodiment of the present invention.
  • the terminal successfully receives the transmitted multicast data for the transmission of the multicast data, it relies on the HARQ mechanism to feed back the ACK, and if the multicast data is not successfully received, it immediately depends on the HARQ.
  • the mechanism reports a NACK, and the base station can trigger the HARQ retransmission after receiving the NACK.
  • the terminal reporting the NACK will continue to report the NACK. Therefore, for the multicast data transmission performed by the LTE cluster system, the addition of the HARQ mechanism ensures reliability. But continuous NACK reporting will be extremely negative for transmission. Bear.
  • a data transmission method is proposed to solve the technical problem that some terminals cannot successfully receive data during the data multicast process between cluster devices, and the reliability of data transmission is ensured, and the transmission is not burdened.
  • the method is as shown in FIG. 1, and includes:
  • Step 110 Receive signaling reported by the terminal in the multicast transmission process of the data, where the signaling carries the unsuccessful reception of data in the multicast transmission fed back by the terminal.
  • the cluster device includes the base station and the terminal.
  • the base station transmits the multicast data to the multiple terminals. If the terminal cannot successfully receive the data transmitted by the base station through the multicast during the transmission of the multicast data, the signaling is reported. At this time, the base station receives the signaling reported by the terminal, so as to obtain the unsuccessful reception feedback of the data performed by the terminal.
  • Step 130 Trigger unicast transmission of data in the performed multicast transmission according to the signaling reported by the terminal and the preset condition.
  • the preset condition is read, and according to the condition, when the current system supports multicast to unicast and has unicast capability, the unicast transmission of data is triggered.
  • the preset conditions include that the current system is configured with multicast to unicast and the remaining system bandwidth is higher than a set bandwidth limit.
  • Step 150 transmitting data to the terminal by unicast transmission.
  • a terminal that cannot successfully receive data in multicast transmits data to it through unicast transmission. That is to say, in the process of performing multicast transmission in the terminal included in the multicast group, the unicast transmission of data is performed on the terminal that cannot successfully receive the data, thereby improving the data transmission efficiency through multicasting. The reliability of data transmission is guaranteed.
  • step 130 includes:
  • step 131 the remaining system bandwidth is obtained.
  • the current remaining system bandwidth is evaluated and the remaining system bandwidth is obtained to learn the current communication capability based on the obtained remaining system bandwidth.
  • step 133 it is determined whether the preset condition is met according to the preset upper layer configuration and the remaining system bandwidth. If yes, step 135 is notified, and if no, no processing is performed.
  • the preset upper-layer configuration knows whether the multicast-to-unicast is currently supported. That is, whether the multicast-to-unicast configuration item is enabled in the upper-layer configuration, such as setting the enable group. Broadcasting the unicast configuration item indicates that the current data transmission is multicast-to-unicast.
  • step 135 a unicast transmission of data is triggered.
  • the step 150 includes:
  • Step 151 establishing a unicast channel with the terminal.
  • Step 153 In the multicast transmission that is performed, the data is unicast to the terminal through the unicast channel.
  • the base station directly sends signaling through the unicast channel to transmit data to the terminal, ensuring that the terminal can successfully receive the data.
  • the standard LTE process can be entered, and the AMC mechanism in the LTE process is identified to ensure that the transmitted MCS modulation and coding mode matches the current channel quality, thereby ensuring the data transmission. Reliability.
  • the method as described above further includes:
  • Step 210 Receive a unicast user link state, where the unicast user link state is reported by the terminal that performs unicast transmission.
  • the terminal During the unicast transmission, the terminal obtains the unicast user link status according to the strength of the received signal and reports it to the base station.
  • Step 230 The data transmission performed by the terminal is back-off from the unicast transmission to the multicast transmission according to the unicast user link state.
  • the base station determines whether the link state between the terminal and the terminal continues to improve according to the unicast user link status reported by the terminal, and if yes, triggers the state machine fallback mechanism to perform the current operation.
  • the data transmission is rolled back to the multicast transmission by unicast transmission.
  • the state machine fallback mechanism is a mechanism for converting from unicast transmission to multicast transmission in the base station.
  • the method as described above further includes:
  • Step 310 Acquire a duration corresponding to the data that the terminal has successfully received the multicast transmission.
  • the base station side will also determine whether the channel quality of the terminal that obtains the data by unicast transmission is improved according to the multicast transmission result of the data, that is, the AMC result, so as to trigger the state machine fallback mechanism to be converted to multicast in the case of improvement. Transmission, which in turn increases the efficiency of data transmission.
  • a terminal that obtains data by unicast transmission it listens to the unicast channel to receive the unicast transmission data, and also listens to the multicast channel to receive the multicast transmission data, only because the multicast channel quality is better. Poorly, the terminal cannot successfully receive data transmitted by the base station through multicast.
  • the terminal will gradually receive the data transmitted by the base station through the multicast.
  • the base station side can learn from the multicast transmission result of the data that the terminal receives the data transmitted by the multicast. duration.
  • Step 330 Determine whether the duration is higher than the preset time value. If yes, notify step 350. If no, return to step 150.
  • the terminal resumes its multicast transmission to successfully receive the data transmitted by the base station through the multicast, and the duration is higher than the preset time value, it may determine that the current multicast channel quality is improved, and the multicast transmission may be resumed to the terminal to improve Data transmission efficiency.
  • step 350 the data transmission of the terminal is backed up by the unicast transmission to the multicast transmission.
  • a data transmission method is also provided correspondingly, as shown in FIG. 6, the method includes:
  • Step 410 Detect the receiving status of the data in the received multicast transmission.
  • Step 430 Generate corresponding signaling according to the receiving status, where the signaling carries the unsuccessful receiving information of the data in the multicast transmission.
  • Step 450 reporting signaling to the base station.
  • the terminal implements the active reporting of unsuccessful reception of data in the multicast transmission.
  • the terminal is any terminal involved in the multicast process of the base station. That is to say, any terminal in the multicast group can perform feedback through the transmission of a signaling.
  • the private signaling can be sent through the uplink, and the uplink NACK feedback is not needed, so that the data obtained by the single transmission can be received, the transmission reliability is ensured, and the state machine back-off mechanism is applicable.
  • the step 430 includes:
  • step 431 it is determined whether the data that is not successfully demodulated in the data currently received by the terminal is up to the preset number of frames. If yes, the process proceeds to step 433. If not, no processing is performed.
  • Step 433 Generate signaling that feeds back to the base station that the data in the multicast transmission is unsuccessfully received.
  • the active reporting mechanism is added to the terminal, so that the terminal can actively request the base station to perform unicast transmission on the data according to the data receiving status of the current multicast transmission, thereby successfully receiving data.
  • a data transmission device is further provided. As shown in FIG. 8, the device includes a signaling receiving module 510, a unicast triggering module 530, and a unicast transmitting module 550, where:
  • the signaling receiving module 510 is configured to receive, during the multicast transmission process of the data, the signaling reported by the terminal, where the signaling carries the unsuccessful reception of the data in the multicast transmission fed back by the terminal.
  • the unicast triggering module 530 is configured to trigger unicast transmission of data in the performed multicast transmission according to the signaling reported by the terminal and the preset condition.
  • the unicast transmission module 550 is configured to transmit data to the terminal by using unicast transmission.
  • the unicast triggering module 530 includes a bandwidth acquiring unit 531, a condition determining unit 533, and a unicast transmission triggering unit 535, where:
  • the bandwidth obtaining unit 531 is configured to acquire the remaining system bandwidth.
  • the condition determining unit 533 is configured to determine, according to the preset upper layer configuration and the remaining system bandwidth, whether Meet the preset conditions.
  • the unicast transmission triggering unit 535 is configured to transmit the data unicast to the terminal through the unicast channel when the condition determining unit 533 determines YES.
  • the unicast transmission module 550 as described above includes a channel establishment unit 551 and a unicast transmission unit 553, where:
  • the channel establishing unit 551 is configured to establish a unicast channel with the terminal.
  • the unicast transmission unit 553 is configured to unicast and transmit data to the terminal through a unicast channel in the performed multicast transmission.
  • the apparatus as described above further includes a status receiving module 610 and a first back-off module 630, wherein
  • the status receiving module 610 is configured to receive a unicast user link status, where the unicast user link status is reported by the terminal performing unicast transmission.
  • the first back-off module 630 is configured to roll back data transmission performed by the terminal from the unicast transmission to the multicast transmission according to the unicast brain link status.
  • the apparatus further includes a time acquisition module 710, a determination module 730, and a second fallback module 750, where:
  • the time obtaining module 710 is configured to acquire a duration corresponding to the data that the terminal has successfully received the multicast transmission.
  • the determining module 730 is configured to determine whether the duration is higher than the preset time value. If yes, the second backoff module 730 is notified, and if not, the unicast transmission module 550 is notified to continue the unicast transmission.
  • the second backoff module 730 is configured to roll back the data transmission of the terminal from the unicast transmission to the multicast transmission.
  • a data transmission device is further provided, and the device includes a detection module 810, a status processing module 830, and a reporting module 850, wherein:
  • the detecting module 810 is configured to detect a receiving status of the data in the received multicast transmission.
  • the status processing module 830 is configured to generate corresponding signaling according to the receiving status, where the signaling carries the unsuccessful receiving information of the data in the multicast transmission.
  • the reporting module 850 is configured to report signaling to the base station.
  • the status processing module 830 includes a frame number determining unit 831 and a signaling generating unit 833, where:
  • the frame number determining unit 831 is configured to determine whether the data that is not successfully demodulated in the data currently received by the terminal in the terminal is up to a preset number of frames, and if yes, notify the signaling generating unit 833, if not, the Do any processing.
  • the signaling generating unit 833 is configured to generate, to the base station, feedback signaling that the data in the multicast transmission is unsuccessfully received.
  • a data transmission system a base station, and a terminal that communicates with the base station are further provided, wherein the terminal is configured to report the corresponding signaling for feedback when the data transmitted by the base station is not successfully received.
  • the base station packet is configured to receive signaling reported by the terminal in the multicast transmission of the data, and the terminal feeds back the unsuccessful reception of the data in the multicast transmission by using the signaling;
  • Data is transmitted to the terminal through unicast transmission.
  • FIG. 15 is a schematic structural diagram of another communication device according to an embodiment of the present invention.
  • the communication device 900 is a network side device, and may be a base station in actual use, including: at least one processor 901, such as a CPU, a baseband controller, and the like. At least one mobile communication radio frequency component 903, memory 904, at least one communication bus 902. Among them, the communication bus 902 is used to implement connection communication between these components.
  • the memory 904 may be a high speed RAM memory or a non-volatile memory such as at least one disk memory.
  • the memory 904 can also optionally be at least one storage device located remotely from the aforementioned processor 901.
  • a set of program codes is stored in the memory 904, and the processor 901 is configured to call program code stored in the memory for performing the following operations:
  • Data is transmitted to the terminal through unicast transmission.
  • the step of the processor 901 triggering unicast transmission of data in the performed multicast transmission according to the signaling and preset conditions reported by the terminal includes:
  • Trigger a unicast transmission of data Trigger a unicast transmission of data.
  • the step of the processor 901 transmitting the data to the terminal by using a unicast transmission includes:
  • data is unicast to the terminal through a unicast channel.
  • the processor 901 further performs the step of transmitting the data to the terminal by using a unicast transmission:
  • the unicast user link state is received, and the unicast user link state is reported by the terminal performing unicast transmission;
  • the data transmission performed by the terminal is back-off from the unicast transmission to the multicast transmission according to the unicast user link state.
  • the processor 901 further performs:
  • a communication device which may be a user terminal, such as a walkie-talkie, a mobile phone, etc., in actual use, including at least one processor, at least one mobile communication radio frequency component, a memory, and at least one communication bus, the memory
  • the program code is stored, and the processor is configured to call the program code stored in the memory to perform the following operations:
  • the signaling is actively reported to feed back to the base station the unsuccessful reception of data in the multicast transmission.
  • the step of the processor 901 performing the triggering generation of the corresponding signaling according to the receiving condition includes:
  • a person skilled in the art may understand that all or part of the steps of implementing the above embodiments may be completed by hardware, or may be instructed by a program to execute related hardware, and the program may be stored in a computer readable storage medium.
  • the storage medium mentioned may be a read only memory, a magnetic disk or an optical disk or the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé de transmission de données. Le procédé comprend les étapes consistant à : recevoir une signalisation envoyée par un terminal dans un processus de transmission en multidiffusion de données, la signalisation contenant des informations renvoyées par le terminal et indiquant une réception infructueuse de données dans la transmission en multidiffusion; déclencher une transmission en monodiffusion des données dans la transmission en multidiffusion en fonction de la signalisation envoyée par le terminal et d'une condition prédéfinie; et transmettre les données au terminal au moyen d'une transmission en monodiffusion. L'invention concerne en outre un appareil et un système de transmission de données, et un dispositif de communication. Grâce au procédé, à l'appareil et au système de transmission de données, et au dispositif de communication, la vitesse de transmission de multidiffusion peut être garantie, et la fiabilité de réception de données de n'importe quel terminal dans un groupe de multidiffusion peut être assurée.
PCT/CN2015/099839 2015-12-30 2015-12-30 Procédé, appareil et système de transmission de données, et dispositif de communication Ceased WO2017113175A1 (fr)

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CN112737756B (zh) * 2019-03-29 2022-06-28 华为技术有限公司 通信方法和通信装置
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US12022541B2 (en) 2019-03-29 2024-06-25 Huawei Technologies Co., Ltd. Communication method and communications apparatus

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