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
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[0028] Example one
[0029] figure 1 This is a schematic flow chart of an information transmission method provided in the first embodiment of the present invention. The method is suitable for the case of feeding back the reception status of the multicast service in the network system of the Internet of Things. The method can be executed by the 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 an Internet of Things system.
[0030] For IoT systems, such as MTC and NB-IoT, the existing process of downlink multicast service transmission can be expressed as follows: The base station sends multicast service messages (including control messages and control messages) to UEs within the coverage area. Data message); the UE first receives the control message and decodes the control message, and then receives the data message of the multicast service according...
Example Embodiment
[0043] Example two
[0044] figure 2 This is a schematic flow chart of an information transmission method provided in the second embodiment of the present invention. The embodiment of the present invention is optimized based on the above-mentioned embodiment. In this embodiment, the optimization of the method adds: The base station sends an acknowledgement failure feedback message, so that the base station retransmits the first multicast service in a unicast or multicast manner.
[0045] Further, the method is 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 confirm that the current status is any one or more of the following: successfully received, configured for unicast retransmission, received unicast retransmission control message, and ...
Example Embodiment
[0070] Example three
[0071] image 3 This is a schematic flow diagram of an information transmission method provided in the third embodiment of the present invention. The embodiment of the present invention is optimized on the basis of the above-mentioned embodiments. In this embodiment, the optimization of sending feedback messages to the base station includes: The feedback mechanism or the physical layer-based feedback mechanism sends a feedback message to the base station.
[0072] On the basis of the above optimization, this embodiment further adds: determining whether to use a higher-level feedback mechanism or a physical layer-based feedback mechanism according to the configuration of the base station; or, determining whether to support the higher-level feedback mechanism and / or whether it is in a connected state Use a high-level feedback mechanism or a physical layer-based feedback mechanism.
[0073] Such as image 3 As shown, the information transmission method provided i...
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