RAN Scheduling for Independently Decodable MDC Encodings
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Solution Overview
Problem
Existing wireless communication systems struggle to effectively utilize multiple description coding (MDC) by discarding one encoding if the other is not received, leading to inefficiencies in decoding and reliability of data transmission.
Innovation Solution
Implementing radio access network enhancements that allow for independent decoding of primary and secondary encodings, scheduling them in different slots or subframes, and adjusting transport block sizes to ensure both encodings are transmitted or received separately, thereby avoiding RLC SDU segmentation and ensuring reliable data delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple description coding encodings are transmitted together in the same transport block, then transmission efficiency is improved, but reliability deteriorates because one encoding is discarded if the other is not received
Solution Approach 1:
The patent segments the transport block into multiple independent transmission opportunities by scheduling primary and secondary encodings in different slots or subframes. This allows each encoding to be independently received and decoded, resolving the contradiction by enabling both efficient use of multiple encodings while ensuring reliability through independent transmission paths.
Solution Approach 2:
The patent introduces a time dimension to the transmission by scheduling encodings in different slots or subframes rather than transmitting them simultaneously in the same transport block. This dimensional separation allows receivers to obtain at least one encoding even if the other is missed, improving reliability while maintaining transmission efficiency.
2Adaptability or versatility
If RLC SDU segmentation is applied to multiple description coding encodings, then adaptability to channel conditions is improved, but decoding complexity increases and reliability deteriorates
Solution Approach 1:
The patent applies segmentation at the scheduling level rather than at the RLC SDU level. By dividing the transmission into separate slots or subframes for primary and secondary encodings, the system achieves channel adaptation without requiring complex RLC SDU segmentation and reassembly, thereby reducing decoding complexity while maintaining adaptability.
Solution Approach 2:
The patent extracts the segmentation function from the RLC layer and implements it at the scheduling layer. This extraction eliminates the need for complex RLC SDU segmentation handling while preserving the ability to adapt to channel conditions through independent scheduling of encodings in different time resources.
3Speed
If both primary and secondary encodings are scheduled in the same slot, then transmission speed is improved, but reliability deteriorates due to potential loss of one encoding
Solution Approach 1:
The patent transitions from spatial multiplexing (same slot) to temporal multiplexing (different slots or subframes) for transmitting primary and secondary encodings. This dimensional change maintains transmission speed by utilizing available time resources while improving reliability through time diversity, ensuring that receivers can obtain at least one encoding even under poor channel conditions.
Data Source
AI summary
A method of wireless communication at a first wireless device is disclosed herein. The first wireless device monitors at least one radio bearer for RLC segmentation information corresponding to a set of SDUs associated with the first wireless device. The first wireless device transmits, for a second wireless device, at least one RLC SDU that includes a number of encodings based on the RLC segmentation information corresponding to the set of SDUs.