Adaptive MAC Header Field Sizing for Wireless Data Transmission
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing wireless communication systems, particularly in UMTS, face challenges in achieving high data rates due to limitations in the MAC and RLC protocol layers, leading to increased overhead and inefficiencies in data transmission, especially with the introduction of MIMO and higher-order modulation in Release-7 UMTS.
Innovation Solution
A flexible MAC header format is introduced, optimizing field sizes based on the length of protocol data units, reducing overhead by recognizing dependencies between fields and adjusting the size of fields such as segmentation indication and transmission sequence number fields accordingly, allowing for efficient multiplexing and segmentation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the MAC header uses fixed field sizes to ensure compatibility and simplicity, then device complexity is reduced and ease of operation is improved, but overhead increases and data transmission efficiency deteriorates
Solution Approach 1:
The patent applies dynamics by making the MAC header format adaptive rather than fixed. The header structure dynamically adjusts its field sizes based on the actual data transmission requirements, allowing the segmentation indication field and transmission sequence number field to be optimized in size according to the protocol data unit length, thereby reducing overhead while maintaining processing capability
Solution Approach 2:
The patent changes the parameters of the MAC header by introducing a format indicator that specifies different field size configurations. Depending on the data length requirements, the header can switch between different parameter sets (e.g., full segmentation indication vs. reduced segmentation indication), optimizing the balance between overhead and functionality
2Adaptability or versatility
If the MAC header includes all possible fields for maximum versatility, then adaptability is improved, but device complexity and overhead increase
Solution Approach 1:
The patent applies local quality by making different parts of the MAC header have different levels of detail based on local requirements. The segmentation indication field and transmission sequence number field are optimized locally according to the actual data length, rather than using a uniform detailed structure throughout the entire header, reducing complexity while maintaining necessary adaptability
3Adaptability or versatility
If the transmission sequence number field uses maximum bits for wide range support, then adaptability is improved, but overhead increases and productivity decreases
Solution Approach 1:
The patent changes the parameter of the transmission sequence number field by making its bit length variable rather than fixed. The field size is adjusted based on the required sequence number range for the given data transmission scenario, reducing overhead when a full range is not needed while maintaining adaptability when a wider range is required
Data Source
AI summary
A data signal is transmitted in a wireless communication system from a primary station to a secondary station. The data signal comprising a medium access control header (MAC-hs header) and a protocol data unit associated with the medium access control header. The medium access control header comprising a set at least one field (e.g. TSN, SEG, LI, FMT, LCid), wherein a size allocated to at least one field of the set is determined based on a length of the protocol data unit.