ARQ Data Retransmission via Variable Transport Block Sizing
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Solution Overview
Problem
Existing ARQ protocols in wireless communications face challenges with variable packet sizes due to radio channel fluctuations and resource sharing, leading to inefficiencies in retransmissions, particularly in LTE and UMTS systems, where re-segmentation and complex header structures increase processing load and complexity.
Innovation Solution
A method and apparatus that detect and retransmit data packets within transport blocks, ensuring the size of protocol data units does not exceed a variable size limit dependent on transport block sizes, allowing for flexible allocation of logical channel capacity and delaying retransmissions until a suitable transport block is available, thereby avoiding the need for re-segmentation and simplifying sequence number handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If data packets are retransmitted in variable-sized transport blocks, then transmission flexibility is improved, but packet segmentation complexity increases
Solution Approach 1:
The patent segments the transport block into multiple packets, where each packet can be independently transmitted and acknowledged. This segmentation allows the system to handle variable-sized transport blocks by dividing them into manageable units that fit within available resources, thereby achieving transmission flexibility without requiring complex re-segmentation of individual packets during retransmission.
Solution Approach 2:
The patent implements dynamic packet sizing where the size of packets is adapted based on the available transport block size. The system dynamically adjusts packet dimensions to match the variable capacity of the transport block, eliminating the need for fixed-size packet structures and reducing segmentation complexity while maintaining flexibility.
2Productivity
If re-segmentation is performed to fit packets into transport blocks, then transmission efficiency is improved, but processing load increases
Solution Approach 1:
The patent performs preliminary segmentation of the transport block into packets before transmission. By pre-segmenting the data structure, the system eliminates the need for complex re-segmentation operations during retransmission, thereby reducing processing load while maintaining transmission efficiency. The preliminary action of structuring data into transport-block-aligned packets avoids subsequent computational overhead.
3Measurement precision
If complex header structures are used for re-segmentation, then packet identification accuracy is improved, but device complexity increases
Solution Approach 1:
The patent applies local quality by using simplified header structures that are tailored to the specific requirements of each packet within the transport block. Rather than using a complex universal header structure, the system employs lightweight, context-appropriate headers that provide sufficient identification accuracy without adding unnecessary complexity to the overall system.
Data Source
AI summary
A method, apparatus and computer program product are provided for facilitating transmission of data. A method and apparatus may detect one or more items of data that were transmitted with at least one error or unsuccessfully delivered to a device. The method and apparatus may enable retransmission of the items of data in at least one transport block. The method and apparatus may enable transmission of one or more items of new data in the at least one transport block such that a size of the new data does not exceed a variable size limit of a transport block size. The variable size limit may be dependent on one or more sizes of one or more transport blocks. The method and apparatus may determine that the variable size limit comprises a size smaller than a size of the at least one transport block.