Multi-FA Access Scheme for Frequency Overlay in Broadband Wireless Systems
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Solution Overview
Problem
Current OFDM broadband wireless communication systems can only support terminals using a single bandwidth, requiring a change in frequency allocation to accommodate new terminals with wider bandwidths, which renders existing terminals incompatible.
Innovation Solution
Implementing a multi-Frequency Allocation (FA) access scheme with a controller distributing packets to processors for MAC layer processing and physical layer encoding/decoding, allowing simultaneous communication with terminals using different bandwidths through frequency overlay, enabling independent operation of multiple FAs with separate MAC addresses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single Frequency Allocation (FA) is used in the broadband wireless communication system, then the system can support terminals using a single bandwidth, but the system cannot support new terminals requiring wider bandwidth without changing the FA configuration, which would render existing terminals incompatible
Solution Approach 1:
The patent divides the frequency allocation into multiple independent FAs (Frequency Allocations), where each FA can be independently configured and assigned to different terminals. This segmentation allows the system to support multiple bandwidth requirements simultaneously by allocating appropriate FAs to different terminals, resolving the contradiction between adaptability and complexity.
Solution Approach 2:
The patent creates a multi-FA access scheme where the system can simultaneously serve both legacy terminals (using narrow bandwidth) and new terminals (using wide bandwidth) through different FA configurations. Each FA maintains its own MAC address and can operate independently, enabling the system to fulfill multiple functions with a single unified architecture.
2Adaptability or versatility
If the Frequency Allocation (FA) is changed to support new terminals with wider bandwidth, then new terminals can be supported, but existing terminals using narrow bandwidth become incompatible and cannot be served
Solution Approach 1:
The patent implements a dynamic FA management system where multiple FAs with different bandwidth configurations can coexist and be dynamically assigned to terminals based on their requirements. The system can flexibly allocate narrow-band FAs to legacy terminals and wide-band FAs to new terminals, maintaining stability for existing operations while enabling new capabilities.
Solution Approach 2:
The patent employs a nested structure where multiple FAs are organized hierarchically under a unified multi-FA access scheme. Each FA contains its own complete MAC layer processing and physical layer encoding/decoding capabilities, allowing smaller FAs to be nested within the larger system architecture while maintaining their independence and compatibility.
3Adaptability or versatility
If multiple Frequency Allocations (FAs) are used to support terminals with different bandwidths, then both legacy and new terminals can coexist, but the system complexity increases with multiple MAC addresses and separate processing requirements
Solution Approach 1:
The patent segments the MAC layer processing into separate processing units, with each FA having its own dedicated MAC address and processing path. This segmentation allows independent processing of packets for each FA, simplifying the overall complexity by avoiding the need for complex multiplexing and demultiplexing operations that would be required in a unified processing approach.
Solution Approach 2:
The patent introduces a controller as an intermediary that manages packet distribution to multiple processors for MAC layer processing. This controller coordinates the multi-FA access scheme by directing packets to appropriate processors based on the target FA, thereby managing the complexity of multiple processing paths through a centralized coordination mechanism.
Data Source
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Figure 1B~1B(C)
Figure 2
AI summary
A broadband wireless communication system is provided. A sending apparatus in the broadband wireless communication system includes a controller for distributing packets to a plurality of processors to transmit the packets in a multi-Frequency Allocation (FA) access mode; the plurality of the processors for processing the packet provided from the controller in a Media Access Control (MAC) layer; and a plurality of senders for encoding the packets provided from the corresponding processors in a physical layer and transmitting a signal generated through the physical layer encoding.