Transport Block Segmentation Using Reference Tones for Retransmission
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Solution Overview
Problem
In wireless communication systems, efficient retransmission techniques for transport blocks (TBs) are hindered by varying frame sizes and overhead channel allocations, leading to inconsistent CB sizes and MCS, which complicates successful decoding and combination of initial and retransmitted TBs.
Innovation Solution
TBs are segmented into code blocks (CBs) based on a reference number of tones for overhead channels, with CB size indicators and MCS being consistently maintained across transmissions to facilitate successful decoding and combination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the number of CBs and CB sizes are determined dynamically based on actual tones allocated for overhead channels, then resource utilization efficiency is improved, but the complexity of retransmission management increases due to inconsistency between initial transmission and retransmission parameters
Solution Approach 1:
The patent applies preliminary action by determining the number of code blocks and code block sizes based on a reference number of tones for the overhead channel before actual transmission. This pre-determination ensures that both initial transmission and retransmission use consistent parameters, eliminating the need for complex dynamic adjustments during retransmission while still allowing efficient resource utilization through the reference-based approach.
2Adaptability or versatility
If CB segmentation is based on varying tones allocated for overhead channels, then adaptability to different channel conditions is improved, but reliability of retransmission decreases due to parameter inconsistency
Solution Approach 1:
The patent determines CB segmentation parameters in advance based on reference tones before transmission begins. This preliminary determination ensures that the same segmentation parameters are used for both initial transmission and retransmission, maintaining reliability while still adapting to channel conditions through the reference-based segmentation approach.
Solution Approach 2:
Instead of dynamically adjusting CB segmentation based on actual overhead channel tones during transmission (which would cause inconsistency), the patent inverts the approach by using a fixed reference number of tones to determine segmentation parameters in advance. This inversion ensures consistency across transmissions while maintaining adaptability through the reference-based method.
3Measurement precision
If detailed CB size indicators are transmitted for each retransmission, then decoding accuracy at the receiving device is improved, but signaling overhead increases
Solution Approach 1:
The patent uses copying by transmitting the CB size indicator only once during initial transmission. The receiving device then uses this copied information for both initial decoding and retransmission decoding, eliminating the need to retransmit the same sizing information and thereby reducing signaling overhead while maintaining decoding accuracy.
Solution Approach 2:
The CB size indicator is determined and transmitted in advance during initial transmission setup. This preliminary provision of sizing information allows the receiving device to use the same indicator for both initial and retransmitted CBs, ensuring accurate decoding without requiring additional signaling for retransmissions.
Data Source
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AI summary
Methods, systems, and devices for wireless communication are described. A method may include identifying a reference number of tones for an overhead channel of a transport block and segmenting the transport block into a code block based at least in part on the reference number of tones for the overhead channel. In some examples, a code block indicator or the reference number of tones may be transmitted on a control channel. Another method may include receiving a code block size indicator associated with a code block of a transport block, decoding the code block based at least in part on the code block size indicator and assembling the transport block based at least in part on the decoded code block. In some examples, the code block size indicator may be received using a control channel.