A data retransmission method and communication device

Abstract

An embodiment of the present application provides a data retransmission method and a communication device. The method includes starting a timer before the sending end transmits new data to the receiving end; the preset value of the timer is the maximum transmission delay corresponding to the service type of the data; when the sending end needs to retransmit the data retransmitting the data to the receiving end; the sending end transmits the data to the receiving end; when the timer expires, the sending end stops sending retransmission data to the receiving end, the The retransmission data is part or all of the data. In this way, the problem in the prior art that the maximum number of retransmissions has not been exhausted, but the maximum transmission delay has been exhausted, the sender is still sending data and the receiver receives expired data is avoided, and redundancy can be avoided transmission, saving transmission resources.

Description

technical field

[0001] The present application relates to the technical field of wireless communication, and in particular to a data retransmission method and a communication device. Background technique

[0002] Ultra-Reliability Low-Latency Communication (URLLC) is an important scenario in the future communication network. The typical characteristics of this scenario are high reliability (for example, 99.999% reliability) and transmission time Low delay (for example, the delay for some services should be less than 1ms).

[0003] Data retransmission, such as Hybrid Auto ReQuest (HARQ) is an important means to improve transmission reliability, so the communication in the URLLC scenario is very likely to introduce retransmission technology to meet reliability requirements, including feedback-based The retransmission technology and the retransmission technology not based on feedback.

[0004] Feedback-based retransmission technology means that after the sending end sends dat...

Examples

Embodiment 1

[0188] combine Figure 4 and Figure 5 , to illustrate that in the embodiment of the present application, the first embodiment of the data retransmission method that controls data retransmission to meet the requirements of the maximum transmission delay by setting a timer is as follows:

[0189] Step 500, the transceiver 410 of the base station 41 first sends the maximum transmission delay to the transceiver 400 of the terminal 40;

[0190] In a possible implementation manner, the value of the maximum transmission delay is obtained or determined by the base station 41 from a quality of service (Quality of Service, QoS) parameter corresponding to the service type of the terminal 40; when the QoS parameter is established, The base station 41 sends it to the terminal 40 through RRC (Radio Resource Control, radio resource control) signaling.

[0191] Step 501, the processor 401 of the terminal 40 is used to obtain new data to be sent, for example, when the new data arrives at th...

Embodiment 4

[0243] Combine below Figure 4 and Figure 10 , to illustrate the fourth embodiment of the data retransmission method for controlling the terminal to perform data retransmission by setting the maximum number of transmission times by the base station in the embodiment of the present application, as follows:

[0244] In the fourth embodiment, after the terminal obtains the new data to be sent, it performs the first transmission and retransmission according to the maximum number of transmissions, instead of retransmitting according to the maximum number of retransmissions uniformly specified by the system, and the maximum number of transmissions The number of times is determined by the base station.

[0245] details as follows:

[0246] In step 800, the processor 411 of the base station 41 determines the maximum number of data transmissions performed by the terminal 40; the calculation method for determining the maximum number of transmissions by the base station 41 is as descr...

Embodiment 5

[0252] Combine below Figure 4 and Figure 11 , to illustrate that in the embodiment of the present application, the fifth embodiment of the data retransmission method in which the terminal controls the terminal to perform data retransmission by setting the maximum number of transmissions by itself is as follows:

[0253] In step 900, the base station 41 and the terminal 40 respectively determine the maximum number of transmissions. In this embodiment, the maximum number of transmissions is determined by the base station 41 and the terminal 40 according to the same pre-agreed rules, tables, formulas, etc. Maximum number of transfers.

[0254] In step 901, the terminal 40 sends data to the base station 41 based on the maximum number of transmissions. Specifically, every time the transceiver 400 of the terminal 40 sends data to the transceiver 410 of the base station 41, its processor 401 will reduce the maximum number of transmissions by 1. When the maximum number of transmis...

technical field

[0001] The present application relates to the technical field of wireless communication, and in particular to a data retransmission method and a communication device. Background technique

[0002] Ultra-Reliability Low-Latency Communication (URLLC) is an important scenario in the future communication network. The typical characteristics of this scenario are high reliability (for example, 99.999% reliability) and transmission time Low delay (for example, the delay for some services should be less than 1ms).

[0003] Data retransmission, such as Hybrid Auto ReQuest (HARQ) is an important means to improve transmission reliability, so the communication in the URLLC scenario is very likely to introduce retransmission technology to meet reliability requirements, including feedback-based The retransmission technology and the retransmission technology not based on feedback.

[0004] Feedback-based retransmission technology means that after the sending end sends dat...

Examples

Embodiment 1

[0188] combine Figure 4 and Figure 5 , to illustrate that in the embodiment of the present application, the first embodiment of the data retransmission method that controls data retransmission to meet the requirements of the maximum transmission delay by setting a timer is as follows:

[0189] Step 500, the transceiver 410 of the base station 41 first sends the maximum transmission delay to the transceiver 400 of the terminal 40;

[0190] In a possible implementation manner, the value of the maximum transmission delay is obtained or determined by the base station 41 from a quality of service (Quality of Service, QoS) parameter corresponding to the service type of the terminal 40; when the QoS parameter is established, The base station 41 sends it to the terminal 40 through RRC (Radio Resource Control, radio resource control) signaling.

[0191] Step 501, the processor 401 of the terminal 40 is used to obtain new data to be sent, for example, when the new data arrives at th...

Embodiment 4

[0243] Combine below Figure 4 and Figure 10 , to illustrate the fourth embodiment of the data retransmission method for controlling the terminal to perform data retransmission by setting the maximum number of transmission times by the base station in the embodiment of the present application, as follows:

[0244] In the fourth embodiment, after the terminal obtains the new data to be sent, it performs the first transmission and retransmission according to the maximum number of transmissions, instead of retransmitting according to the maximum number of retransmissions uniformly specified by the system, and the maximum number of transmissions The number of times is determined by the base station.

[0245] details as follows:

[0246] In step 800, the processor 411 of the base station 41 determines the maximum number of data transmissions performed by the terminal 40; the calculation method for determining the maximum number of transmissions by the base station 41 is as descr...

Embodiment 5

[0252] Combine below Figure 4 and Figure 11 , to illustrate that in the embodiment of the present application, the fifth embodiment of the data retransmission method in which the terminal controls the terminal to perform data retransmission by setting the maximum number of transmissions by itself is as follows:

[0253] In step 900, the base station 41 and the terminal 40 respectively determine the maximum number of transmissions. In this embodiment, the maximum number of transmissions is determined by the base station 41 and the terminal 40 according to the same pre-agreed rules, tables, formulas, etc. Maximum number of transfers.

[0254] In step 901, the terminal 40 sends data to the base station 41 based on the maximum number of transmissions. Specifically, every time the transceiver 400 of the terminal 40 sends data to the transceiver 410 of the base station 41, its processor 401 will reduce the maximum number of transmissions by 1. When the maximum number of transmis...

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