Transparent Relay Station MBMS Transmission Coordination
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Solution Overview
Problem
The next-generation mobile communication system lacks a method for transmitting and receiving multimedia broadcast multicast services (MBMS) with the participation of a transparent relay station (RS), preventing effective service provision to user equipment (UE).
Innovation Solution
A method and device for transmitting MBMS services involve encoding and modulating data by base stations, relaying it through transparent relay stations using the same time and frequency resources, ensuring data format consistency, and simultaneous transmission with base stations, followed by processing at terminals to recover the original data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If transparent relay stations are deployed to extend MBMS coverage, then the coverage area is improved, but the system lacks a defined transmission method for MBMS services
Solution Approach 1:
The patent introduces transparent relay stations as intermediary nodes between base stations and user equipment. These relay stations receive MBMS data from base stations, perform relay processing, and forward the data to UEs, thereby extending MBMS coverage to areas beyond direct base station reach while maintaining the existing MBMS transmission framework.
Solution Approach 2:
The patent segments the MBMS transmission path into multiple hops: base station to relay station, and relay station to user equipment. This segmentation allows the system to extend coverage by adding intermediate relay nodes without requiring changes to the overall MBMS service architecture or base station transmission methods.
2Stability of the object's composition
If relay processing is performed at transparent RSs, then data format consistency is maintained, but transmission coordination complexity increases
Solution Approach 1:
The patent implements preliminary action by having base stations notify relay stations in advance about upcoming MBMS data transmissions. This advance notification includes timing and resource allocation information, allowing relay stations to prepare their relay processing and coordinate their transmissions with base stations, thereby reducing actual transmission coordination complexity during the MBMS service delivery.
3Reliability
If simultaneous transmission from base stations and relay stations is implemented, then air interface gain is provided to UE, but resource allocation complexity increases
Solution Approach 1:
The patent implements feedback mechanisms where relay stations report their processing status and resource availability to base stations. Base stations use this feedback information to coordinate resource allocation, determining when and how relay stations should simultaneously transmit MBMS data. This feedback loop enables simultaneous transmission for improved reliability while managing resource allocation complexity through informed decision-making.
Data Source
AI summary
A method and a device for transmitting a multimedia broadcast multicast service are provided. The method includes one or more base stations encode and modulate the original multimedia broadcast multicast service data to be transmitted, and transmit the encoded and modulated multimedia broadcast multicast service data to one or more transparent relay stations belonging to the one or more base stations via a specified same time and frequency resource; the one or more transparent relay stations performs a relay process for the received multimedia broadcast multicast service data; then the one or more transparent relay stations and the one or more base stations transmit the multimedia broadcast multicast service data via the specified same time frequency resource simultaneously; and a terminal processes the received multimedia broadcast multicast service data to acquire the original multimedia broadcast multicast service data. The present invention can improve the MBMS service transmission performance in the next generation mobile communication system.