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MBMS transmission feedback method, system and devices

A technology for feedback information and terminal equipment, which is applied in multi-frequency code systems, using return channels for error prevention/detection, broadcast service distribution, etc. Achieve the effect of enriching service types, reducing frequency domain interference, and improving overall performance

Inactive Publication Date: 2010-03-31
CHINA ACAD OF TELECOMM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

The traditional MBMS service is usually a one-way transmission service based on downlink broadcast and multicast. Since there is no feedback function, the sending end usually does not know the specific situation of the receiving end

Method used

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  • MBMS transmission feedback method, system and devices
  • MBMS transmission feedback method, system and devices
  • MBMS transmission feedback method, system and devices

Examples

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Embodiment Construction

[0040] Below in conjunction with accompanying drawing and embodiment, the specific embodiment of the present invention is described in further detail:

[0041] The MBMS transmission feedback method disclosed in the present invention includes the following steps: the terminal receives the MBMS service sent by the base station, the MBMS service is sent by OFDM modulation, and the subcarrier interval of the OFDM modulation is T; the terminal selects a signal equal to or greater than The subcarrier interval of T sends the feedback information to the base station.

[0042] Such as figure 1 As shown, it is a flow chart of realizing the feedback method of MBMS transmission in the present invention.

[0043] S101. The terminal receives an MBMS service.

[0044] The main features of MBMS services are large data volume, strong real-time performance, and wide coverage. As an embodiment of the present invention, the following describes the present invention in detail by taking the MBMS...

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Abstract

The present invention discloses an MBMS transmission feedback method comprising steps that a terminal receives MBMS services sent by a base station, the MBMS services are sent in a mode of OFDM modulation, an interval between sub-carriers of the OFDM modulation is T; the terminal selects an interval between sub-carriers equal to or larger than T and sends feedback information to the base station.The present invention also provides an MBMS transmission feedback system and devices. By adopting the technical solution of the invention, information is fed back by selecting bigger interval betweensub-carriers, therefore, frequency domain interfere of the system can be reduced and the whole performance of the system can be improved.

Description

technical field [0001] The present invention relates to the field of mobile communication, specifically, the present invention relates to the technical field of MBMS of mobile communication. Background technique [0002] In order to effectively utilize mobile communication network resources, 3GPP (3rd Generation Partnership Project, 3rd Generation Partnership Project) proposed MBMS (MultimediaBroadcast Multicast Service, Multimedia Broadcast Multicast Service) for mobile communication networks, thereby providing a data The point-to-multipoint service that the source sends data to multiple users realizes the sharing of network resources and improves the utilization rate of network resources, especially the sharing of air interface resources. [0003] The MBMS proposed by 3GPP can not only realize the multicast and broadcast of plain text and low-rate messages, but also realize the multicast and broadcast of high-speed multimedia services. In order to further improve the tran...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/06H04L1/16H04L27/26
Inventor 林亚男索士强丁昱
Owner CHINA ACAD OF TELECOMM TECH
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