OFDMA Burst Region Allocation via MAP Segmentation
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Solution Overview
Problem
In OFDMA wireless communication systems, the increasing number of mobile stations leads to increased calculation time for allocating slots, reducing transmitting efficiency due to the complexity of determining slot allocations.
Innovation Solution
A method and communication apparatus that decode MAP messages into parameters to assign and merge or subtract burst regions, determining the transmitting region by processing these parameters to optimize slot allocation, thereby reducing calculation time and enhancing efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of mobile stations increases, then the system capacity increases, but the calculation time for slot allocation increases
Solution Approach 1:
The patent divides the frame into multiple burst regions (first burst region, second burst region, etc.) and assigns different mobile stations to different regions. The MAP message is segmented into multiple information elements, each describing parameters for a specific burst region. This segmentation allows the base station to process slot allocation in parallel for different regions, reducing overall calculation time while supporting more mobile stations.
Solution Approach 2:
The base station pre-divides the available frame resources into multiple burst regions with different parameters (symbol offsets, sub-channel offsets, number of symbols, number of sub-channels) before slot allocation. This preliminary preparation allows the base station to quickly assign slots to mobile stations without performing complex real-time calculations, thus reducing allocation time as the number of stations increases.
2Quantity of substance
If the number of mobile stations increases, then the system capacity increases, but the transmitting efficiency decreases
Solution Approach 1:
By segmenting the frame into multiple burst regions and assigning different mobile stations to different regions, the patent enables parallel transmission for multiple stations simultaneously. This segmentation approach increases transmitting efficiency by allowing more mobile stations to transmit data at the same time without interfering with each other, thus improving overall system productivity.
Solution Approach 2:
The base station pre-configures multiple burst regions with optimized parameters (symbol offsets, sub-channel offsets, duration) before the transmission begins. This preliminary arrangement allows the system to quickly accommodate increasing numbers of mobile stations without disrupting ongoing transmissions, maintaining high transmitting efficiency even as the number of stations grows.
3Manufacturing precision
If complex slot allocation is performed, then accurate resource distribution is achieved, but calculation time increases
Solution Approach 1:
The patent segments the complex slot allocation problem into multiple simpler sub-problems, one for each burst region. Each burst region has predefined parameters (symbol offset, sub-channel offset, number of symbols, number of sub-channels) that can be independently assigned to mobile stations. This segmentation maintains accurate resource distribution while reducing the complexity and time required for allocation calculations.
Solution Approach 2:
The patent uses predefined parameter sets for different burst regions, where each region is characterized by specific values of symbol offset, sub-channel offset, number of symbols, and number of sub-channels. By changing which parameter set is assigned to which mobile station rather than calculating optimal parameters in real-time, the system achieves accurate resource distribution with reduced calculation time.
Data Source
AI summary
A method and a communication apparatus for deciding a transmitting region for an allocated transmitting burst in a frame of an orthogonal frequency division multiplex access (OFDMA) system are provided. The communication apparatus comprises a decoder and a processing unit. The decoder decodes an MAP message, which is related to the allocated transmitting burst, into a plurality of parameters. The processing unit assigns a plurality of burst regions in the frame according to the parameters and decides a transmitting region according to the burst regions.