Variable Length Radio Link ID for Signaling Overhead Reduction
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In mobile communication systems like EUTRAN, the large number of users requires significant resources for signaling unique Radio Link IDs (RLIDs), which is inefficient due to the need for 16-bit IDs for each active user, leading to substantial channel capacity usage for allocation information.
Innovation Solution
Assigning a shorter Radio Link ID (RLID) with fewer digital bits to user equipment when it meets a predetermined transmission regularity criterion, allowing for resource allocation using the short RLID in specific subframes and the original RLID in others, thereby reducing signaling resource requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a 16-bit Radio Link ID is assigned to each active user to ensure unique identification, then user identification reliability is improved, but signaling resource consumption increases
Solution Approach 1:
The patent segments the user identification function into two parts: a 16-bit Radio Link ID for unique identification and a shorter short RLID for resource allocation signaling. This segmentation allows the system to maintain reliable user identification while reducing the signaling overhead by using only the shorter identifier for allocation purposes.
Solution Approach 2:
The patent applies different identifier lengths to different functional requirements: the full 16-bit RLID is used where complete uniqueness is required, while a shorter short RLID is used locally for resource allocation signaling where absolute uniqueness is less critical. This local quality differentiation optimizes the balance between identification reliability and signaling efficiency.
2Productivity
If the number of active users is increased to support more user equipment, then system capacity is improved, but the number of bits required for RLID signaling increases
Solution Approach 1:
The patent introduces a dynamic identifier system where the short RLID is assigned based on the user's transmission regularity. Users with regular transmission patterns receive short RLIDs, while those with irregular patterns use full RLIDs. This dynamic approach allows the system to support more users with reduced signaling overhead by adapting the identifier length to actual usage patterns.
Solution Approach 2:
The patent changes the parameter of identifier length based on transmission regularity. By monitoring whether users transmit and receive transport blocks with regularity, the system can switch between using short RLIDs and full RLIDs, effectively reducing the average number of signaling bits required while maintaining the ability to support a large number of active users.
3Productivity
If short RLID is used to reduce signaling resources, then signaling efficiency is improved, but user identification accuracy may deteriorate
Solution Approach 1:
The patent introduces a selection mechanism that acts as an intermediary between the short RLID and full RLID. Based on transmission regularity assessment, this intermediary selects the appropriate identifier type for each user, ensuring that short RLIDs are used only when they provide sufficient identification accuracy, while full RLIDs are used when complete precision is required.
Solution Approach 2:
The system performs self-assessment of transmission regularity and automatically selects the appropriate identifier length for each user without external intervention. This self-service approach allows the system to optimize the balance between signaling efficiency and identification accuracy dynamically, using short RLIDs for regular users and full RLIDs for irregular users.
Data Source
AI summary
The specification and drawings present a new method, system, apparatus and software product for varying a length of a radio link ID (RLID) of a user equipment for resource allocation in mobile communication systems. This allows the system to employ shorter RLID lengths than is necessary if all user equipments (UEs) in the active mode are uniquely identified simultaneously, thus providing considerable savings in the signaling resource on the physical layer.