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Harq feedback method and device for Internet of Things multicast service

A technology of multicast service and feedback device, applied in the field of mobile communication and Internet of Things, can solve the problem of not being received by the base station, etc., and achieve the effect of improving reliability

Active Publication Date: 2019-12-27
BEIJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the DAI-based method cannot solve the above-mentioned situation where the NACK sent by the user is not received by the base station, which needs to be solved urgently

Method used

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  • Harq feedback method and device for Internet of Things multicast service
  • Harq feedback method and device for Internet of Things multicast service
  • Harq feedback method and device for Internet of Things multicast service

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Embodiment Construction

[0038] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0039] The HARQ feedback method and device for the Internet of Things multicast service according to the embodiments of the present invention will be described below with reference to the accompanying drawings. First, the HARQ feedback method for the Internet of Things multicast service proposed according to the embodiments of the present invention will be described with reference to the drawings.

[0040] figure 1 It is a flow chart of a HARQ feedback method for an Internet of Things multicast service according to an embodiment ...

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Abstract

The invention discloses an HARQ (Hybrid Automatic Repeat reQuest) feedback method and device of Internet of things multicast service, wherein the method comprises the following steps of during the downlink transmission in each time, allocating a plurality of parallel feedback resources for a user; in downlink scheduling information, using a plurality of bits as new data indications so as to indicate new data indications different from the previous data in the downlink control information by a base station during the new data transmission and to realize the sequential circulation; for re-uploaded data, controlling the base station to indicate the new data indications identical to the primarily uploaded data in the downlink control information; when the user receives random downlink transmission and discovers the existence of previous data which is not successfully received, feeding back the receiving failure of the previous data on other resources according to the current time transmission feedback occasions; detecting the energy on the public feedback resources; judging the receiving conditions of the current multicast transmission on the public feedback resources; transmitting theprevious data package through the preset transmission rule according to the transmission time. The method has the advantages that the receiving failure of the previous data package is fed back; the transmission reliability is effectively enhanced.

Description

technical field [0001] The present invention relates to the technical fields of mobile communication and the Internet of Things, in particular to a HARQ (Hybrid Automatic Repeat reQuest, Hybrid Automatic Repeat reQuest) feedback method and device for multicast services of the Internet of Things. Background technique [0002] The Internet of Things is an important part of the new generation of information technology. In 3GPP (3rd Generation Partnership Project, the third generation partnership project), the Internet of Things technology has been completed, such as NB-IoT (NarrowBand Internet of Things, cellular-based narrowband Internet of Things), MTC (MachineTypeCommunication, machine communication) standardization, It is used to support the communication of a large number of low-throughput, low-latency-sensitive, low-power-overhead devices. In order to meet the market demand for machine-to-machine communication and further improve resource utilization efficiency, it is a ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/18H04L5/00H04W4/06
CPCH04L1/1812H04L1/1887H04L5/0055H04W4/06
Inventor 孙薇淇王文博胡春静李勇
Owner BEIJING UNIV OF POSTS & TELECOMM
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