Multicarrier Random Access Channel Allocation for Uplink Control
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Solution Overview
Problem
In multicarrier communication systems, existing methods for uplink control are inefficient as they lack a structured approach to allocate random access channels for different types of uplink operations, leading to potential synchronization issues and increased complexity in bandwidth request management across primary and secondary carriers.
Innovation Solution
The proposed solution involves allocating specific types of random access channels (initial, periodic, handover, and bandwidth request) to primary carriers, with primary carriers designated for initial synchronization, periodic synchronization, handover, and bandwidth requests, while secondary carriers are used for periodic synchronization and bandwidth allocation, with predetermined allocation patterns to optimize channel usage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If separate random access channels are allocated for each type of uplink operation across all carriers, then synchronization accuracy is improved, but device complexity and channel management overhead increase
Solution Approach 1:
The patent segments the random access channel allocation by operation type and carrier type. Specifically, it divides uplink operations into different categories (initial access, periodic synchronization, handover, bandwidth request) and allocates channels differently based on whether the carrier is primary or secondary. This segmentation allows precise synchronization for each operation while managing complexity through structured allocation rules.
Solution Approach 2:
The patent applies local quality by providing different channel allocation qualities to different carriers based on their roles. Primary carriers receive comprehensive channel allocations for all operation types, while secondary carriers receive allocations only for specific operations (periodic synchronization and bandwidth request). This ensures high synchronization accuracy where needed while reducing overall system complexity.
2Reliability
If comprehensive random access channel allocation is provided for all carriers, then uplink control reliability is improved, but resource overhead increases
Solution Approach 1:
The patent segments channel resource allocation between primary and secondary carriers, allocating comprehensive channels only to primary carriers and limited channels to secondary carriers. This segmentation maintains reliable uplink control for critical operations on primary carriers while reducing overall resource overhead by avoiding redundant channel allocations on secondary carriers.
Solution Approach 2:
The patent makes primary carriers universal by allocating all types of random access channels to them, allowing primary carriers to handle any uplink operation. Secondary carriers have specialized functionality for specific operations. This multi-functionality approach ensures reliable control while optimizing resource usage across the carrier hierarchy.
3Productivity
If structured channel allocation is implemented for different operation types, then bandwidth request management efficiency is improved, but initial system configuration complexity increases
Solution Approach 1:
The patent segments bandwidth request handling by dedicating specific random access channels for bandwidth requests on both primary and secondary carriers. This segmentation improves bandwidth request management efficiency by providing dedicated paths while the standardized segmentation rules reduce initial configuration complexity through predictable allocation patterns.
Solution Approach 2:
The patent applies preliminary action by establishing predetermined channel allocation rules during system initialization. The structured allocation of random access channels for different operations is configured in advance according to carrier roles, which simplifies subsequent bandwidth request management while the preliminary configuration follows standardized patterns that reduce initial setup complexity.
Data Source
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AI summary
An uplink control method for use in a communication system based on multiple carriers. The method includes allocating different types of random access channels for different types of uplink operations.