Wireless Network Access Synchronization via Dynamic Frame Parsing
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Solution Overview
Problem
Current wireless communication systems, such as WiFi and Femto technologies, face inefficiencies due to random multi-access mechanisms like CSMA/CA, leading to resource waste and low system efficiency, while Femto systems struggle with dynamic matching of service demands and resource allocation in asymmetric data services.
Innovation Solution
A method and device for accessing a wireless network that includes synchronization acquiring and maintaining processes, detecting and parsing physical frames on subchannels to acquire system parameters, and selecting available subchannels for synchronization, using timers to manage detection and reselection when synchronization is lost.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If CSMA/CA mechanism is employed for wireless access, then device flexibility and low cost are achieved, but system efficiency deteriorates due to random competition and collision
Solution Approach 1:
The patent introduces a centralized controller as an intermediary between wireless terminals and the network. This controller coordinates random access by managing backoff timers and assigning transmission opportunities, thereby reducing collisions while preserving the distributed architecture's simplicity and low cost.
Solution Approach 2:
The system implements feedback mechanisms where the centralized controller monitors channel status, terminal backoff timer states, and transmission outcomes. Based on this feedback, the controller dynamically adjusts transmission opportunities and backoff parameters to optimize system efficiency without increasing device complexity.
2Device complexity
If static resource allocation is used in TDD Femto system, then device complexity is reduced, but adaptability to varying service demands deteriorates
Solution Approach 1:
The patent implements dynamic resource allocation where the centralized controller continuously monitors service demands and dynamically adjusts uplink-downlink resource distribution in TDD systems. This allows the system to adapt to varying traffic patterns while keeping individual device complexity low through centralized management.
Solution Approach 2:
The system segments resource allocation into controllable units that can be independently adjusted based on service demands. The centralized controller divides wireless resources into time slots and frequency channels, allocating them dynamically to different services such as web browsing, video streaming, and mobile games according to real-time requirements.
Data Source
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AI summary
The present invention provides a method for accessing a wireless network, so as to implement acquisition of system synchronization during the process of accessing the wireless network in the situation that a physical frame structure can be configured dynamically. The method for acquiring system synchronization comprises: searching a physical frame on a current sub-channel; resolving a system information channel (SICH) and a control channel (CCH) in the found physical frame, wherein the SICH indicates a structure of the physical frame, and the CCH indicates allocation of system resources; and acquiring a system parameter from the physical frame by using the resolving result. A device for implementing the above method is further provided.