UE Data Transmission Mode Switching for Early Data
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Solution Overview
Problem
Current communication systems lack an efficient method for switching data transmission between radio access technologies, particularly for early data transmission, which limits data transmission capacity and increases latency and power consumption.
Innovation Solution
The development of a method that allows user equipment (UE) to autonomously switch between eMTC/NB-loT mode and NR-EDT mode based on data packet size, using distinct PRACH resource sets for each mode, enabling efficient data transmission without full RRC connection establishment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If legacy RACH procedure is used for early data transmission, then reliability is improved, but latency and power consumption increase
Solution Approach 1:
The patent segments the RACH procedure into two distinct paths: legacy RACH for high reliability scenarios and EDT (Early Data Transmission) for low latency scenarios. The UE selectively chooses between these segmented paths based on packet size and service requirements, allowing optimization of both reliability and latency for different transmission scenarios.
Solution Approach 2:
The patent introduces dynamic switching capability between legacy RACH and EDT procedures. The UE can dynamically select the appropriate transmission mode based on real-time conditions such as packet size, channel quality, and service type, making the system adaptive rather than static.
2Productivity
If full RRC connection establishment is performed, then data transmission capacity is improved, but power consumption and latency increase
Solution Approach 1:
The patent extracts the essential data transmission functionality from the complete RRC connection establishment procedure. By allowing data transmission in the idle state through EDT, it removes the unnecessary steps of full connection establishment for small data packets, thereby reducing power consumption while maintaining adequate transmission capacity.
Solution Approach 2:
Instead of performing the complete RRC connection establishment (excessive action), the patent enables partial action by allowing data transmission without full connection setup. The UE can transmit data in Msg3 of the random access procedure, which is sufficient for small packets but avoids the overhead of complete connection establishment.
3Device complexity
If PRACH resources are shared between legacy and EDT, then device complexity is reduced, but transmission reliability deteriorates
Solution Approach 1:
The patent segments the PRACH resources into separate pools: one for legacy RACH procedures and another for EDT. This segmentation prevents resource conflicts between the two modes and ensures that EDT transmissions have dedicated resources, thereby maintaining high reliability without significantly increasing overall system complexity.
Solution Approach 2:
The patent creates a copied but specialized version of PRACH resources specifically for EDT. Instead of modifying the legacy resource structure, it establishes a parallel resource pool that mirrors the necessary functionality while being optimized for EDT requirements, thus maintaining reliability without complicating the original legacy structure.
Data Source
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AI summary
An apparatus comprising: at least one processor; and at least one memory including computer program code, the at least one memory and computer program code configured to, with the at least one processor, cause the apparatus to perform: determining at least one condition; and based on the at least one condition, transmitting a data packet to a first access node using one of a first early data transmission type in a first mode of operation and a second early data transmission type in a second mode of operation of the apparatus.