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Data transmission method and device

A data transmission method and data technology, applied in the field of communication, to achieve the effects of improving reliability, solving high delay, and improving transmission efficiency

Pending Publication Date: 2020-11-10
CHENGDU HUAWEI TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This application provides a data transmission method and device to solve the problem of how to ensure that the data sent by the network device to the terminal device can be successfully received in the prior art in multicast transmission or multicast transmission

Method used

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Examples

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Embodiment Construction

[0078]Embodiments of the present application are applied to existing communication systems, or fifth-generation mobile communication technology (5th-Generation, 5G) communication systems, or other systems that may appear in the future, for example, this application can be applied to general mobile communication systems ( Universal mobile telecommunications system (UMTS) system is the second-generation mobile communication technology (2th-Generation, 2G) wireless communication system, code division multiple access (CDMA) system, wideband code division multiple access (wideband code The third-generation mobile communication technology (3G) wireless communication system represented by division multiple access (WCDMA), and the fourth-generation mobile communication technology (4Generation, 4G) represented by long-term evolution (LTE). ) wireless communication system, wireless local area network (wireless local area network, WLAN) or future 5G wireless communication system, etc. So...

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Abstract

The invention provides a data transmission method and device, and the method comprises the steps: transmitting first indication information and second indication information to a terminal device, withthe first indication information being used for indicating whether to-be-transmitted data is retransmission data or not, and the second indication information being used for indicating a version number of the data; and sending the data and the group identifier to the terminal device, with the group identifier being used for indicating the terminal device capable of correctly obtaining the data. According to the invention, repeated transmission of data in multicast transmission or multicast transmission is realized, a unicast transmission mode is not adopted any more, the data transmission efficiency can be improved, and the problem of relatively high time delay of unicast transmission is solved; because repeated transmission of the data can be carried out in multicast transmission or multicast transmission, the data sent to the terminal equipment by the network equipment can be successfully received; and the reliability of Uu port multicast or multicast transmission is effectively improved. Moreover, according to the scheme provided by the embodiment of the invention, multicast or multicast repeat transmission can be completed based on the SCPTM.

Description

technical field [0001] The present application relates to communication technologies, and in particular to a data transmission method and device. Background technique [0002] With the development of communication technology, various communication technologies have been widely used and developed. In communication technology, data transmission and other processes are performed between network devices and terminal devices. The network device can send data to the terminal device, thereby realizing unicast transmission, but because the efficiency of unicast transmission is low, the network device can send data to the terminal device in a multicast transmission or multicast transmission manner. [0003] In the prior art, when multicast transmission or multicast transmission is used for data transmission, the network device can transmit data to multiple terminal devices, thereby realizing multicast transmission or multicast transmission, and in multicast transmission or In the p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04W72/00H04W72/04H04L1/18H04L1/00H04W4/06
CPCH04W28/04H04W72/0446H04W72/0453H04L1/1893H04W4/06H04L1/0027H04W72/30H04W72/23
Inventor 马驰翔张伟
Owner CHENGDU HUAWEI TECH
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