Uplink Cancellation Handling for Dependent Wireless Procedures
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Solution Overview
Problem
Interference in wireless communication networks leads to instances of uplink transmission cancellation, which negatively impacts communication performance and user satisfaction, and existing technologies lack effective methods to manage such cancellations.
Innovation Solution
Implementing a method to categorize uplink transmission cancellations as fast or slow based on the availability of time to meet specific timelines, and providing a transmission indication attribute to manage dependent procedures impacted by these cancellations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a link is cancelled in a multi-link procedure, then the cancelled link is removed from the communication path, but all dependent procedures on that link must also be cancelled causing service interruption
Solution Approach 1:
The patent applies preliminary action by pre-establishing a procedure dependency graph that maps all dependent procedures before call setup begins. When a link cancellation request arrives, the system immediately queries this pre-built graph to identify all dependent procedures, allowing rapid cancellation without service interruption. This pre-computation of dependencies enables the system to react quickly to link failures while maintaining service continuity through alternative paths.
Solution Approach 2:
The patent segments the call setup procedure into independent, manageable components represented as nodes in a procedure dependency graph. Each procedure (e.g., resource reservation, routing selection, authentication) is treated as a separate unit with defined dependencies. This segmentation allows the system to cancel only the necessary dependent procedures when a link fails, rather than cancelling the entire call setup process, thereby maintaining service continuity for independent procedures.
2Reliability
If all dependent procedures are cancelled when a link is cancelled, then consistency of the communication system is maintained, but call setup time increases due to procedural overhead
Solution Approach 1:
The system performs preliminary action by pre-computing and storing the procedure dependency graph during system initialization or configuration phases. This pre-computed structure allows the call setup controller to immediately identify dependent procedures upon link cancellation without performing time-consuming dependency analysis during the actual call setup. The query operation on the pre-built graph is computationally efficient, significantly reducing call setup time while ensuring all necessary procedures are cancelled to maintain system consistency.
3Ease of operation
If procedure dependencies are tracked manually, then control over dependent procedures is achieved, but signaling overhead and processing complexity increase
Solution Approach 1:
The patent creates a virtual copy of the procedure dependency structure in the form of a procedure dependency graph stored in memory. Instead of manually tracking dependencies through complex signaling messages and processing logic, the system maintains a data structure that mirrors the procedural relationships. This graphical representation allows the call setup controller to efficiently query dependencies using simple graph traversal algorithms, dramatically reducing signaling overhead and processing complexity while maintaining complete control over procedure execution and cancellation.
Data Source
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AI summary
Techniques described provide dependent procedure operation configured for avoiding or mitigating one or more aspect of the impact on the dependent procedure of cancelling an uplink transmission. One or more attributes (e.g., a transmission indication attribute) associated with a cancelled uplink transmission may be designated for dependent procedure operation, such as for indicating whether the cancelled uplink transmission is considered either as having been transmitted or not having been transmitted. The one or more attributes associated with a cancelled uplink transmission designated for dependent procedure operation may be based upon whether the cancelling the first uplink transmission is a fast cancellation or is a slow cancellation. The designation of a transmission indication attribute for dependent procedure operation may correspond to the dependent procedure and/or its operation. Other aspects and features are also claimed and described.