Persistent Resource Allocation in Wireless Base Stations
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Solution Overview
Problem
Wireless communication systems face significant overhead in resource allocation due to frequent changes in communication channel quality, leading to MAP errors and inefficient resource utilization.
Innovation Solution
The method involves generating groups of allocation units based on Modulation and Coding Schemes (MCS) and traffic characteristics, with resource allocation information transmitted only when necessary, allowing for efficient mapping and allocation of resources to Mobile Stations, reducing MAP overhead and improving communication efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resource allocation information is transmitted in every transmission frame to handle channel quality changes, then the system can adapt to channel variations, but the MAP overhead increases significantly
Solution Approach 1:
The patent segments resource allocation information into two types: persistent allocations (transmitted periodically or on change) and dynamic allocations (transmitted only when needed). This segmentation allows the system to reduce MAP overhead by not transmitting full resource allocation information in every frame, while still maintaining adaptability through selective transmission of changes.
Solution Approach 2:
The patent implements periodic transmission of resource allocation information combined with event-driven updates. Instead of transmitting in every frame, the system transmits persistent allocations periodically or when changes occur, reducing overall overhead while maintaining system adaptability to channel quality variations.
2Adaptability or versatility
If additional resource allocation information is transmitted to indicate MCS switching, then the system can adapt to channel quality changes, but the MAP overhead increases
Solution Approach 1:
The patent extracts and separates MCS indication from the main resource allocation information. By using compact MCS indicators and separate signaling mechanisms, the system can indicate MCS switching without transmitting complete resource allocation information, thereby reducing MAP overhead while maintaining adaptability.
Solution Approach 2:
The patent changes the representation parameters of resource allocation information by using compact MCS indicators and differential encoding. Instead of transmitting full resource allocation details, the system transmits changed parameters (MCS indicators), reducing the quantity of information while maintaining adaptability to channel variations.
3Productivity
If resource allocations are changed to utilize unused slots, then resource utilization improves, but additional MAP transmission is required increasing overhead
Solution Approach 1:
The patent applies preliminary action by pre-allocating flexible resource blocks and establishing rules for hole utilization before transmission occurs. This allows the base station to efficiently allocate unused slots to other users without requiring frequent MAP updates, as the allocation framework is predetermined and only changes are signaled.
4Quantity of substance
If persistent resource allocation is used to reduce overhead, then MAP overhead decreases, but the system cannot quickly adapt to channel quality changes
Solution Approach 1:
The patent introduces dynamics by allowing persistent allocations to be updated and modified based on channel conditions. The system transitions from static persistent allocation to dynamic persistent allocation where changes can be signaled efficiently, maintaining low overhead while improving adaptability to channel quality variations.
Data Source
AI summary
A method and apparatus i.e. Base Station for allocating resources in a wireless communication system is provided. The method includes generating a plurality of first groups of allocation units based on one or more of a plurality of Modulation and Coding Schemes (MCSs) and traffic characteristics in the wireless communication system. The method further includes generating a second group of slots including resource allocation information for mapping first groups of allocation units to Mobile Stations (MSs) based on MCSs and traffic characteristics associated with first groups of allocation units and the MSs. Thereafter, the method persistently allocates each first group of allocation units to the MSs based on one or more of the resource allocation information and a communication state associated with each MS. Further, the method also identifies if each MS has succeeded in decoding the persistent resource allocation sent in the second group of slots.