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Information transmission method and device

A technology of information transmission and transmission type, which is applied in the field of information transmission methods and devices, and can solve problems such as the inability to successfully receive messages and deterioration of the overall performance of multicast services, and achieve the effect of improving transmission reliability and business performance

Inactive Publication Date: 2018-09-14
BEIJING XINWEI TELECOM TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in the research on the multicast technology of the Internet of Things, the inventor found that the multicast transmission based on the existing multicast data transmission mechanism has the following defects: for some UEs with weak signal coverage, the repeated After the number of times reaches the set value, the message may still not be successfully received. In most cases, since the multicast service for multicast transmission is often sensitive to whether the UE side receives it accurately, if there are still some failures to receive after the repeated transmission UE, it is likely to lead to the deterioration of the overall performance of the multicast service

Method used

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  • Information transmission method and device

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Embodiment 1

[0029] figure 1 It is a schematic flow diagram of an information transmission method provided by Embodiment 1 of the present invention. This method is applicable to the situation where the receiving status of a multicast service is fed back in a network system of the Internet of Things. This method can be executed by an information transmission device, wherein The device can be implemented by software and / or hardware, and is generally integrated on a UE within the coverage of a certain base station in the Internet of Things system.

[0030] For IoT systems, such as MTC and NB-IoT, the existing downlink multicast service transmission process can be described as follows: the base station sends multicast message messages (including control messages and data message); UE first receives the control message and decodes the control message, and then receives the data message of the multicast service according to the decoding result. In the above transmission of the multicast service...

Embodiment 2

[0044] figure 2 It is a schematic flowchart of an information transmission method provided by Embodiment 2 of the present invention. The embodiment of the present invention is optimized based on the above-mentioned embodiments. In this embodiment, the optimization of the method is added: if it is determined that the reception fails, send the The base station sends an acknowledgment failure feedback message, so that the base station retransmits the first multicast service in a unicast or multicast manner.

[0045] Further, the method is further optimized and added: decoding and analyzing the second multicast service sent by the base station, and determining whether it is a retransmission multicast service of the first multicast service according to the analysis result; if it is determined to be a retransmission Multicast service, and the current state is determined to be any one or more of the following: successful reception, configuration for unicast retransmission, control m...

Embodiment 3

[0071] image 3 A schematic flow chart of an information transmission method provided by Embodiment 3 of the present invention. The embodiment of the present invention is optimized on the basis of the foregoing embodiments. In this embodiment, the optimization of sending feedback messages to the base station includes: A feedback mechanism or a feedback mechanism based on a physical layer sends a feedback message to the base station.

[0072]On the basis of the above optimization, this embodiment further adds: according to the configuration of the base station, it is determined to use a high-level feedback mechanism or a physical layer-based feedback mechanism; or, according to whether the high-level feedback mechanism is supported and / or whether it is in a connected state, decide Use a high layer based feedback mechanism or a physical layer based feedback mechanism.

[0073] Such as image 3 As shown, an information transmission method provided by Embodiment 3 of the present...

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Abstract

The embodiment of the invention discloses an information transmission method and device. The method comprises the following steps: decoding and analyzing first multicast service sent by a base station, and determining whether the first multicast service is successfully received according to an analysis result; if determining a fact that the receiving is successful, sending an acknowledgment receiving feedback message to the base station or not performing any feedback, thereby enabling the base station to not retransmit the first multicast service. By using the method disclosed by the embodiment of the invention, the problem that the receiving state feedback cannot be performed in the existing internet of things system multicast transmission is overcome, a receiving state feedback mechanismand a retransmission mechanism are introduced in the multicast service transmission, thereby improving the transmission reliability of the multicast service, and meanwhile, the service performance ofthe multicast service is improved.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of communications, and in particular, to an information transmission method and device. Background technique [0002] In the development of the field of network communication, the Internet of Things technology has received more and more attention. For example, in 3GPP Rel-13, 3GPP has defined a variety of Internet of Things standards. The common machine-type communication (Machine-Type Communication, MTC ) and narrowband cellular Internet of Things (Narrow Band Internet of Things, NB-IoT), etc., based on the above standards, the connection and communication between things can be realized. With the development of Internet of Things technology, the demand for multicast services is becoming stronger and stronger Therefore, in 3GPP Rel-14, MTC and NB-IoT are enhanced with downlink multicast services, so that the base station can send message data to multiple user equipments (User Equipm...

Claims

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Application Information

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IPC IPC(8): H04L1/16H04L1/18H04L5/00
CPCH04L5/0055H04L1/1607H04L1/18
Inventor 周淼孙鹏
Owner BEIJING XINWEI TELECOM TECH
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