Flexible Channelization for Wireless Resource Allocation
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Solution Overview
Problem
Fixed channelization schemes in wireless communications, such as SCMA, do not efficiently utilize resources, especially when the amount of data is small, leading to suboptimal resource allocation.
Innovation Solution
Implementing flexible channelization methods that allow for varying transmission unit (TU) sizes across different UEs and access schemes, enabling coexistence of different TU sizes with partial or full overlap in the time-frequency plane, and configuring TUs in terms of bandwidth, time, and resource units for grant-based and grant-free access schemes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If fixed size transmission units (CTUs) are used for channelization, then the channelization scheme is simple and standardized, but resource allocation efficiency deteriorates when actual data amount is small
Solution Approach 1:
The patent applies dynamics by making the transmission unit size adjustable rather than fixed. The network device can dynamically configure different TU sizes (first TU size and second TU size) based on actual data amounts and service requirements. This allows the system to adapt transmission unit dimensions to match actual data volumes, improving resource allocation efficiency while maintaining standardized channelization procedures through configurable parameters.
Solution Approach 2:
The patent implements parameter changes by modifying the transmission unit size parameter according to different service scenarios. The network device configures different TU sizes (e.g., different numbers of subcarriers or OFDM symbols) based on data amounts, allowing the system to optimize resource usage for both small and large data transmissions while keeping the overall channelization framework standardized.
2Productivity
If different TU sizes are allocated for different UEs, then resource allocation efficiency is improved, but system complexity increases due to multiple access schemes and overlapping resources
Solution Approach 1:
The patent applies segmentation by dividing the system into distinct access scheme categories (first access scheme and second access scheme) with different TU size configurations. Each access scheme has its own standardized TU size definition, allowing the system to handle multiple UEs with different requirements while maintaining manageable complexity through structured segmentation of access methodologies.
Solution Approach 2:
The patent implements universality by creating a unified channelization framework that supports multiple access schemes and TU size configurations through a single standardized interface. The network device can configure different TU sizes for different UEs using the same basic channelization procedures, allowing the system to achieve flexible resource allocation without proportionally increasing system complexity.
3Ease of operation
If fixed channelization is used, then implementation is straightforward, but resource utilization is suboptimal for varying data amounts
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure appropriate TU sizes based on anticipated data amounts and service requirements. The configuration is established in advance through RRC signaling or other control mechanisms, allowing the system to use fixed, straightforward implementation procedures while achieving optimal resource utilization for the specific data volume requirements of each transmission.
Data Source
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AI summary
Systems and methods for flexible channelization are provided. Different TU sizes are used for transmissions by different UEs. The different UEs may use different access schemes, and may transmit using time frequency resources that at least partially overlap.