Narrowband FDM Configuration for Random Access Resource Allocation
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Solution Overview
Problem
Current frequency division multiplexing (FDM) configurations are inadequate for narrowband channel bandwidths, leading to inefficient resource allocation and increased failure rates in random access procedures due to insufficient granularity and invalid resource configurations.
Innovation Solution
The method involves configuring FDM parameters to align with narrowband transmission bandwidths, allowing for valid resource multiplexing within the narrowband channel bandwidth, ensuring that resources used for random access procedures have a valid status and are fully utilized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional FDM configurations are used for narrowband channel bandwidth, then resource allocation is simplified, but resource allocation efficiency deteriorates and failure rates increase
Solution Approach 1:
The patent applies parameter changes by introducing a narrowband indicator that modifies FDM configuration parameters specifically for narrowband channel bandwidth operations. This allows the system to adapt existing FDM mechanisms to narrowband constraints, achieving both configuration simplicity and improved resource allocation efficiency through parameter adaptation rather than complete redesign
2Device complexity
If conventional FDM configurations are used for narrowband channel bandwidth, then device complexity is reduced, but reliability deteriorates due to invalid resource configurations
Solution Approach 1:
The patent modifies FDM configuration parameters by introducing narrowband-specific indicators and validation mechanisms. These parameter changes enable the system to automatically identify and exclude invalid resources from FDM configurations, ensuring all allocated resources are valid for narrowband operations, thereby improving reliability without significantly increasing device complexity
Solution Approach 2:
The patent implements feedback mechanisms where the UE reports valid resources based on narrowband channel bandwidth conditions. This feedback loop allows the network to adjust FDM configurations in real-time, ensuring only valid resources are allocated, thereby improving PRACH transmission reliability while maintaining manageable system complexity
3Speed
If FDM resources are allocated without narrowband consideration, then resource allocation speed is improved, but throughput deteriorates due to invalid resource usage
Solution Approach 1:
The patent applies preliminary action by pre-configuring narrowband indicators and validation rules before resource allocation occurs. This allows the system to quickly identify valid resources for narrowband operations without performing complex validation during the allocation process, maintaining fast allocation speed while ensuring throughput is not compromised by invalid resource usage
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may receive configuration information indicating a frequency division multiplexing (FDM) parameter associated with a random access procedure. The UE may transmit a Message 1 (Msg1) or a Message A (MsgA) on one or more resources in accordance with the configuration information and based at least in part on the one or more resources having a valid status, wherein at least one of the FDM parameter or the valid status is based at least in part on the random access procedure utilizing a narrowband channel bandwidth. Numerous other aspects are described.