RedCap Device PRACH PUSCH Resource Sharing for Small Data
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Solution Overview
Problem
Current mobile communication systems face challenges in efficiently sharing physical random access channel (PRACH) and physical uplink shared channel (PUSCH) resources, particularly for reduced capability (RedCap) devices, leading to increased overhead and complexity in coexistence between different device categories within the same cell.
Innovation Solution
The method involves receiving a configuration for physical uplink shared channel resources, determining these resources based on reduced bandwidth or reduced physical resource blocks, and adjusting the resource block allocation accordingly to enable efficient data communication, allowing for the sharing of resources between RedCap devices with different capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate PRACH and PUSCH resources are allocated for different device categories, then resource allocation is simplified and reliable, but control overhead increases and system efficiency decreases
Solution Approach 1:
The patent merges PRACH and PUSCH resource allocation into a unified framework where RedCap devices can share resources with other device categories. Instead of maintaining separate resource pools, the system uses a single configuration that accommodates multiple device types, reducing control signaling overhead while ensuring reliable resource allocation through standardized procedures.
Solution Approach 2:
The patent implements universal resource allocation mechanisms that serve multiple device categories simultaneously. The PRACH and PUSCH resources are configured to be universally accessible by different device types (RedCap and non-RedCap), with the network entity managing resource distribution dynamically based on device capabilities and traffic requirements.
2Reliability
If dedicated resources are allocated for RedCap devices, then communication reliability is improved, but resource utilization efficiency decreases and complexity increases
Solution Approach 1:
The patent employs dynamic resource allocation where RedCap devices can access PRACH and PUSCH resources based on real-time network conditions and device requirements. The network entity dynamically adjusts resource distribution, allowing RedCap devices to obtain dedicated resources when needed for reliable communication while sharing resources with other devices during periods of lower demand, thus optimizing overall resource utilization.
Solution Approach 2:
The patent utilizes parameter-based resource allocation where the network entity configures specific parameters (such as bandwidth parts, physical resource block allocations, and power control parameters) that are adjusted based on device category and traffic conditions. This allows flexible adaptation of resource characteristics to meet both reliability requirements for RedCap devices and efficiency goals for overall system resource utilization.
3Productivity
If multiple device categories coexist in the same cell, then network capacity is improved, but coexistence complexity and overhead increase
Solution Approach 1:
The patent segments the resource allocation process into distinct phases and layers: physical layer resource configuration, MAC layer scheduling, and RLC layer data transmission. Each layer handles specific aspects of multi-device coexistence, with the physical layer providing segmented resource pools that can be independently configured for different device categories, thereby managing coexistence complexity while maintaining high network capacity.
Solution Approach 2:
The network entity acts as an intermediary that mediates resource allocation between different device categories. It receives resource allocation requests from both RedCap and non-RedCap devices, applies allocation rules and priority schemes, and distributes resources accordingly. This intermediary function simplifies the coexistence management by centralizing the complexity in the network entity rather than requiring complex interaction protocols between devices of different categories.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for sharing PRACH and PUSCH resources when performing RA-based SDT procedures. One method may include receiving, from a network entity, a configuration indicating physical uplink shared channel resources; determining PUSCH resources based on at least one of reduced bandwidth or reduced PRBs; adjusting at least one characteristic of a PRB allocation based on the PUSCH resources and reduced bandwidth; and performing data communication based on the adjusted at least one characteristic of the PRB allocation.