Bootstrap Preamble for OFDMA Link Structure Determination
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Solution Overview
Problem
Wireless access terminals face challenges in determining the structure of forward and reverse communication links in OFDMA systems, requiring extensive storage of configuration parameters and exhaustive searches when link configurations change, which is time-consuming and burdensome for both the network operator and the terminal user.
Innovation Solution
A bootstrap mechanism where the access point provides information in a known preamble structure, allowing the terminal to determine the forward and reverse link physical frame structures, enabling efficient configuration updates without exhaustive searches and minimizing storage requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the AT stores all possible configuration parameters in memory, then the AT can have complete knowledge of FL and RL structures, but the storage requirement and device complexity increase significantly
Solution Approach 1:
The network pre-configures and transmits only the necessary FL and RL structure parameters to the AT through bootstrap messages, rather than requiring the AT to store all possible configurations. This preliminary provision of needed information eliminates the need for extensive local storage while ensuring the AT has complete knowledge of current link structures.
2Loss of information
If the AT performs exhaustive search through all configuration possibilities, then the AT can find the correct FL and RL structure, but the time required and processing complexity increase significantly
Solution Approach 1:
The network performs the configuration determination action in advance and transmits the resulting structure parameters to the AT via bootstrap messages. This eliminates the need for the AT to perform time-consuming exhaustive searches, as the correct configuration is already determined and provided by the network before the AT needs to use it.
Solution Approach 2:
The network acts as an intermediary that determines the appropriate FL and RL configurations and communicates them to the AT through structured bootstrap messages. This intermediary role replaces the AT's exhaustive search process with a direct information provision mechanism, significantly reducing acquisition time.
3Adaptability or versatility
If the network operator changes configuration parameters, then the network can adapt to new requirements, but the AT must perform exhaustive search again or require manual updates
Solution Approach 1:
When the network operator changes configuration parameters, the network system pre-determines the new FL and RL structure parameters and transmits them to affected ATs through updated bootstrap messages. This preliminary update mechanism allows the network to adapt to new requirements while automatically providing updated configurations to terminals, eliminating the need for manual updates or exhaustive searches by the AT.
Solution Approach 2:
The system establishes a feedback mechanism where the network monitors configuration changes and automatically communicates updated FL and RL structure parameters to ATs through bootstrap messages. This feedback loop ensures that when the network adapts to new requirements, the ATs receive updated configuration information automatically, maintaining ease of operation throughout the network.
Data Source
AI summary
Accordingly, a method and apparatus are provided wherein an apparatus comprises plurality of electronic devices, each having a logic, wherein the apparatus is configured for receiving a preamble comprising frame structure parameters; extracting said frame structure parameters from said preamble; and determining a frame structure by demodulating said frame structure parameters.