Cellular Data Packet Redundant Transmission Across Multiple Carriers
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Solution Overview
Problem
Current data transmission schemes in cellular networks face challenges in achieving ultra-reliable signaling with low latency, as required for 5G technology, particularly in critical applications like telesurgery and industrial automation, due to the limitations of existing HARQ processes which increase latency and power consumption.
Innovation Solution
A method for transmitting data packets redundantly across multiple carriers and subcarriers in parallel, with an adaptive redundancy level determined by propagation conditions and quality of service requirements, allowing for efficient data transmission without increasing latency, by using a combination of feedback signals to adjust the number of data transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If repeated transmission is used to increase reliability, then reliability is improved, but latency increases
Solution Approach 1:
The patent applies preliminary action by transmitting multiple redundancy versions of data packets in advance before receiving feedback. The transmitting node sends several redundant copies simultaneously or in rapid succession, so that even if some are lost or corrupted, sufficient copies arrive at the receiver within the latency budget, eliminating the need for repeated transmission cycles.
Solution Approach 2:
The patent implements dynamics by adaptively adjusting the number of redundancy versions transmitted based on channel conditions and QoS requirements. The system dynamically determines the appropriate redundancy level for each data packet, increasing redundancy for critical or poor-channel transmissions while reducing it for reliable channels, thereby optimizing the trade-off between reliability and latency.
2Reliability
If transmission power is increased to improve reception probability, then reliability is improved, but power consumption increases
Solution Approach 1:
The patent applies parameter changes by varying the transmission power across different redundancy versions rather than using constant high power. The system adjusts power levels based on channel conditions, QoS requirements, and the cumulative reception status of previous versions, thereby achieving high reception probability while minimizing overall power consumption.
Solution Approach 2:
The patent implements partial action by transmitting only the necessary number of redundancy versions required to achieve the target reliability, rather than always transmitting maximum redundancy. The system stops transmitting additional versions once the reliability threshold is met, avoiding excessive power consumption while maintaining adequate reception probability.
3Reliability
If multiple redundancy versions are transmitted in parallel, then reliability is improved, but transmission capacity is reduced
Solution Approach 1:
The patent implements dynamics by adaptively adjusting the number of redundancy versions transmitted based on channel conditions and QoS requirements. The system dynamically determines the appropriate redundancy level for each data packet, increasing redundancy for critical or poor-channel transmissions while reducing it for reliable channels, thereby optimizing the trade-off between reliability and transmission capacity.
Solution Approach 2:
The patent applies local quality by allocating different numbers of redundancy versions to different data packets based on their individual QoS requirements and channel conditions. Critical data packets receive higher redundancy allocation while less critical packets use lower redundancy, thereby maintaining high reliability for important traffic while preserving overall transmission capacity.
Data Source
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AI summary
The present invention relates to a method for transmission of a data packet in a cellular network between a transmitting node and a receiving node, the receiving node being configured to receive data packets from the transmitting node, the transmitting node supporting at least one frequency band composed of a plurality of carriers, the method comprising for the transmitting node the step of transmitting to the receiving node a plurality of data transmissions of the data packet according to a predetermined redundancy level, whereby the first of the plurality of data transmissions is transmitted in a resource area addressed by a scheduling occurrence, and the rest of the plurality of data transmissions are transmitted in the same resource area as the first data transmission, and each data transmission is transmitted on a different carrier.