Dynamic Packet Segmentation for Wireless Link Adaptation
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Solution Overview
Problem
Conventional static segmentation size in wireless communications systems limits control signaling and scheduling flexibility at the physical layer, particularly due to varying data rates and channel conditions.
Innovation Solution
A method and system for dynamically varying packet segment size based on received information, using a protocol layer packet segmentation unit, to optimize segment size for transmission, thereby enhancing link adaptation flexibility and reducing overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If static segmentation size is used, then control signaling is simplified, but link adaptation flexibility is reduced
Solution Approach 1:
The patent applies dynamics by transitioning from static to dynamic segmentation size adjustment. The MAC layer dynamically varies packet segment size based on real-time channel conditions and scheduling requirements, allowing the system to adapt to varying data rates while maintaining manageable control signaling through protocol-layer intelligence rather than physical layer complexity.
Solution Approach 2:
The patent changes the parameter of segment size from fixed to variable. By allowing the segmentation unit to adjust segment size as a controllable parameter based on received information from higher layers and physical layer conditions, the system achieves flexible link adaptation without requiring complex control signaling mechanisms.
2Device complexity
If fixed segment size is used, then interface definition between MAC and Physical layer is simplified, but scheduling flexibility is reduced
Solution Approach 1:
The patent introduces dynamics to the segmentation process by enabling the MAC layer to adjust segment sizes based on scheduling decisions and channel conditions. This maintains a well-defined interface between MAC and Physical layers while providing the scheduling flexibility needed for optimal resource allocation and link adaptation.
Solution Approach 2:
The patent implements feedback mechanisms where the MAC layer receives information from both higher layers (about packet characteristics) and lower layers (about physical channel conditions), using this feedback to dynamically adjust segment sizes. This feedback loop enables flexible scheduling while maintaining interface clarity through standardized information exchange protocols.
3Productivity
If larger segment size is used, then transmission efficiency is improved, but link adaptation capability is reduced
Solution Approach 1:
The patent applies dynamics by making segment size adjustable rather than fixed. The segmentation unit dynamically selects appropriate segment sizes based on instantaneous channel conditions, allowing the system to use larger segments for efficient transmission when channels are good, while switching to smaller segments when adaptation is needed due to poor channel conditions.
Solution Approach 2:
The patent changes the segment size parameter from static to dynamic based on channel conditions. By monitoring physical layer information and adjusting segment size accordingly, the system optimizes transmission efficiency while maintaining the link adaptation capability necessary for varying wireless channel conditions.
Data Source
AI summary
In one exemplary aspect thereof the invention provides a method that operates to receive information through at least one input of a protocol layer packet segmentation unit and to dynamically vary packet segment size in accordance with the received information prior to transmission to a receiver. The information received through the at least one input may include information related to channel quality for a channel through which packet data are transmitted to the receiver. The information received through the at least one input may also be or may include information received from at least one of a higher protocol layer or a lower protocol layer.