Multi-carrier Scheduling for Robust High Bit Rate Services
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Solution Overview
Problem
Existing communications systems, such as GSM and EDGE, face challenges in providing high bit rate services like video streaming over MBMS due to low guaranteed carrier-to-interference levels, resulting in high re-transmission rates and low throughput, which is inefficient and requires significant changes in mobile terminals.
Innovation Solution
Implementing a data block scheduling method that allows simultaneous transmission of data blocks on multiple carriers, where receiving units select the best carrier based on reception quality, enabling robust transmission with reduced error rates and efficient resource use without major terminal modifications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If data blocks are transmitted multiple times to provide acceptable robustness at low C/I levels, then reliability is improved, but throughput deteriorates due to excessive re-transmissions
Solution Approach 1:
The patent transitions from single-carrier to multi-carrier transmission, adding a frequency dimension to the transmission system. By transmitting data blocks across multiple carriers simultaneously, the system achieves both robustness through diversity and maintains throughput by parallel transmission, resolving the trade-off between reliability and productivity.
Solution Approach 2:
The patent segments the transmission channel into multiple carriers, allowing data blocks to be transmitted in parallel across different frequency channels. This segmentation enables the system to achieve robustness through carrier diversity while maintaining high throughput via simultaneous transmissions.
2Productivity
If multi-carrier solution is implemented to improve throughput and robustness, then data block throughput is improved, but device complexity increases due to major changes in mobile terminals
Solution Approach 1:
The patent enables mobile terminals to simultaneously receive and process data blocks from multiple carriers using a unified reception framework. The terminal's receiver is configured to monitor multiple carriers and select appropriate ones based on reception quality, achieving multi-carrier functionality without requiring fundamentally different terminal architecture.
Solution Approach 2:
The mobile terminal autonomously selects which carriers to receive from based on measured reception quality metrics. The terminal self-manages the complexity of multi-carrier operation by independently evaluating carrier conditions and making reception decisions without requiring complex external control or major hardware modifications.
Data Source
AI summary
The invention provides a scheduling of data blocks on multiple data carriers and a selection of data carrier to listen to. A transmitting unit simultaneously transmits, during a communication session with at least one participating receiving unit, at least a first data block on a first data carrier and a second data block on a second data carrier. The receiving unit selects which of these data carriers to listen to, i.e. whether to receive the first or second data block, based on a reception quality of a previously received data block. Furthermore, at least one of the first and second data block is based on information common to the data block and the previous data block, e.g. the first or second data block could be re-transmitted version of the previous block.