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Data transmission method and apparatus

A data transmission method and a technology of a data transmission device, which are applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems such as large delays and difficulties in meeting delay-sensitive business requirements, and achieve The effect of meeting the transmission requirements

Inactive Publication Date: 2018-05-11
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Moreover, if the transmission still fails after reaching the maximum number of HARQ retransmissions, the ARQ retransmission process of RLC is required to further ensure the reliability of data transmission, which will inevitably introduce a large delay, making it difficult to meet the delay-sensitive business requirements

Method used

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  • Data transmission method and apparatus
  • Data transmission method and apparatus
  • Data transmission method and apparatus

Examples

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Embodiment 1

[0108] Figure 4It is a schematic flow diagram of dynamically modifying HARQ configuration parameters and / or ARQ configuration parameters by a base station according to an embodiment of the present invention. In this embodiment, the base station dynamically modifies the HARQ configuration parameters and / or ARQ configuration parameters through the data link layer or physical layer control signaling, for example, the base station dynamically configures the terminal through MAC CE or PDCCH to perform multiple Blind retransmission of HARQ, deactivate the ARQ retransmission function of L2 to meet the transmission requirements of ultra-high reliability and low delay (such as URLLC), the terminal uses HARQ configuration parameters and / or ARQ configuration parameters for data transmission processing, specific steps Described as follows:

[0109] Step 401: the base station dynamically modifies HARQ configuration parameters and / or ARQ configuration parameters through control signaling....

Embodiment 2

[0123] Figure 5 It is a flow chart of modifying HARQ configuration parameters and / or ARQ configuration parameters semi-statically by the base station in the embodiment of the present invention. This embodiment is similar to the process of Embodiment 1, except that the base station semi-statically modifies the HARQ configuration parameters and / or ARQ configuration parameters through the network layer control signaling, for example, the base station semi-statically configures the terminal through the RRC control signaling. Multiple HARQ blind retransmissions are performed within a transmission time interval, and the ARQ retransmission function of L2 is deactivated to meet the transmission requirements of ultra-high reliability and low delay (such as URLLC). The terminal adopts HARQ configuration parameters and / or ARQ configuration parameters Perform data transmission processing, the specific steps are described as follows:

[0124] Step 501: the base station semi-statically mo...

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Abstract

The invention discloses a data transmission method and apparatus. The method comprises the following steps: a base station modifies HARQ configuration parameters and / or ARQ configuration parameters according to a transmission delay size and a reliability level; and the base station notifies a terminal of the modified HARQ configuration parameters and / or ARQ configuration parameters. By adoption ofthe technical scheme of the embodiment of the invention, the transmission requirements of a high-reliability and low latency type service can be effectively met.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a data transmission method and device. Background technique [0002] In the Long Term Evolution communication system (LTE, Long Term Evolution), for different service types, the protocol architecture and physical layer parameters of LTE are the same, that is, without considering the conventional cyclic prefix (CP, Cyclic Prefix) and extended CP, different The physical layer parameters such as the subcarrier interval corresponding to the service type, the number of symbols contained in the subframe, the symbol interval, and the subframe format are the same. As far as the user plane is concerned, the reliable transmission of data needs to pass through the radio link control (RLC, Radio LinkControl) Automatic repeat request (ARQ, Automatic Repeat reQuest) and media access control (MAC, Medium Access Control) hybrid automatic repeat request (HARQ, Hybrid ARQ) p...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1812H04L1/1825H04L1/18
Inventor 何青春黄河
Owner ZTE CORP