Wireless Scheduling Request Routing via Secondary Carrier Resources
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing scheduling requests in multicarrier environments, particularly in scenarios involving carrier aggregation and dual connectivity, leading to inefficiencies in resource allocation and increased load on primary component carriers.
Innovation Solution
Implementing a mechanism where a wireless device prioritizes scheduling requests based on logical channel mappings and buffer status reports, allowing for the transmission of these requests through secondary resources when primary resources are inadequate, thereby optimizing resource utilization across multiple carriers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If scheduling requests are transmitted through primary component carriers, then reliability of request delivery is improved, but device complexity and processing load increase
Solution Approach 1:
The patent divides scheduling request transmissions across multiple component carriers (primary and secondary), segmenting the load from a single primary carrier. This allows the system to maintain reliable delivery through primary carriers while distributing additional request handling to secondary carriers, thereby reducing the processing load and complexity on any single carrier.
Solution Approach 2:
Secondary component carriers act as intermediaries for scheduling request transmissions. When primary carrier resources are insufficient or overloaded, the system utilizes secondary carriers as alternative pathways, reducing the burden on primary carriers while maintaining overall system reliability through multiple transmission routes.
2Productivity
If multiple component carriers are utilized for scheduling requests, then resource allocation efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic selection of component carriers for scheduling request transmissions based on current system conditions, buffer status, and resource availability. The wireless device and network can adaptively choose which carriers (primary or secondary) to use for different scheduling requests, optimizing resource allocation efficiency while managing complexity through flexible, condition-based decision-making rather than rigid fixed assignments.
3Productivity
If scheduling requests are prioritized based on logical channel mappings, then productivity is improved, but measurement precision requirements increase
Solution Approach 1:
The patent establishes pre-configured logical channel mappings and prioritization rules before scheduling requests occur. Buffer status reports and logical channel configurations are prepared in advance with defined priority levels and mapping relationships. This preliminary setup enables rapid processing of scheduling requests by simply following pre-determined rules, improving productivity without requiring complex real-time analysis that would demand higher measurement precision.
Data Source
AI summary
A wireless device receives indications of: a first scheduling request (SR) resource corresponding to first logical channel(s) having a first logical channel prioritization (LCP) mapping to first radio resources; and a second SR resource corresponding to second logical channel(s) having a second LCP mapping to second radio resources. A buffer status report (BSR) is triggered in response to data becoming available for the second logical channel(s). First uplink grant(s) indicating a first radio resource of the first radio resources is received. An SR for transmission of the BSR is triggered in response to the first radio resource not meeting the second LCP mapping configured for the second logical channel(s) that triggered the BSR. The SR is transmitted via the second SR resource selected based on the second logical channel(s) triggering the BSR. The BSR is transmitted via a second radio resource of the second radio resources.