Radio Communication Apparatus Contention-Based Resource Selection
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Solution Overview
Problem
Current radio communication systems face inefficiencies in data transmission when using contention-based radio resources, particularly due to contention among multiple mobile stations, leading to procedure failures and reduced communication efficiency.
Innovation Solution
A radio communication apparatus and method that selectively uses contention-based radio resources, control channel radio resources, and random access methods to optimize data transmission by prioritizing one method over others based on resource availability and transmission success, preventing parallel execution of certain methods to avoid resource conflicts and enhance efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If contention based radio resources are used for data transmission, then delay time from dormant state to resumption of data transmission is reduced, but data transmission contention occurs among multiple mobile stations leading to procedure failure
Solution Approach 1:
The mobile station dynamically switches between contention-based uplink access and random access methods based on real-time conditions. When contention-based resources are available and no contention is detected, the system uses this method for fast access. When contention occurs or fails, it transitions to random access, creating a flexible, adaptive access strategy that optimizes both delay and reliability
Solution Approach 2:
The system changes the access method parameter based on detected conditions. By monitoring whether contention-based transmission succeeds or fails, the mobile station adjusts its access strategy - using contention-based resources when successful and switching to random access when failed, thereby resolving the contradiction between speed and reliability
2Reliability
If random access method is used for data transmission, then procedure reliability is improved through base station recognition, but random access contention occurs among multiple mobile stations leading to procedure failure
Solution Approach 1:
The system dynamically selects between random access and contention-based uplink access based on available resources and previous transmission outcomes. When contention-based resources are configured and previous transmissions succeeded, the system prefers this faster method. When random access is needed for reliable base station recognition, it uses this method, creating an adaptive balance between speed and reliability
Solution Approach 2:
The mobile station performs preliminary checks to determine whether contention-based uplink resources are available and whether previous transmissions succeeded. Based on this preliminary assessment, it pre-determines the optimal access method before attempting transmission, avoiding unnecessary random access procedures and reducing overall access time while maintaining reliability when needed
3Productivity
If multiple access methods are executed in parallel, then data transmission efficiency is improved, but resource conflicts occur leading to procedure failure
Solution Approach 1:
The system implements dynamic sequential execution of access methods based on success/failure detection. Instead of parallel execution that causes resource conflicts, the mobile station executes contention-based uplink access first, and only if that fails does it proceed to random access. This sequential, condition-based approach eliminates resource conflicts while maintaining high transmission efficiency through intelligent method selection
Solution Approach 2:
The system converts the potential harm of method execution failures into a beneficial sequential decision-making process. When contention-based transmission fails due to contention, this failure information is used to trigger the random access method, transforming a negative outcome into a structured fallback mechanism that ensures eventual successful transmission without resource conflicts
Data Source
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AI summary
Efficiency in data transmission performed in the case of a contention based radio resource being set is improved. A radio communication apparatus (2) selectively performs one of a first transmission method using for data transmission a radio resource which is assigned by a radio communication apparatus (1) and which can be used on a contention basis by a plurality of radio communication apparatus (2 and 3) and a second transmission method involving random access. Alternatively, the radio communication apparatus (2) selectively performs one of the first transmission method and a third transmission method involving a request made to the radio communication apparatus (1) to assign a radio resource for data transmission.