Early Data Transmission in Random Access Procedure
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Solution Overview
Problem
Current wireless communication technologies face challenges in reducing power consumption and latency during the random access procedure in Machine-Type Communications (MTC) and Internet of Things (IoT) applications, particularly in eMTC and NB-IoT, where early data transmission can lead to inefficiencies and increased resource usage.
Innovation Solution
The method involves performing a random access procedure while transmitting a first block of data and withholding a second block until after the procedure's completion, with the option to transmit the second block after receiving system information indicating permitted transmission during and after the random access procedure, and selecting a suitable preamble to indicate early data transmission intentions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If all data blocks are transmitted during the random access procedure, then transmission latency is reduced, but collision risk and resource conflicts increase
Solution Approach 1:
The patent segments data transmission into two distinct phases: (1) transmission of a first block of data during the random access procedure, and (2) transmission of a second block of data after the random access procedure completes. This segmentation allows the system to reduce latency for urgent data while preventing resource conflicts by staggering transmissions, thereby resolving the contradiction between speed and reliability.
2Use of energy by moving object
If data transmission is performed during random access procedure, then UE power consumption is reduced, but system complexity increases
Solution Approach 1:
The patent implements preliminary action by transmitting the first block of data during the random access procedure itself, rather than waiting for the procedure to complete. This allows the UE to perform data transmission and random access simultaneously, reducing overall power consumption. The system manages this complexity through predefined protocols that coordinate the timing and resource allocation for both operations.
3Productivity
If early data transmission is allowed, then transmission efficiency is improved, but resource allocation complexity increases
Solution Approach 1:
The patent applies dynamics by making resource allocation adaptive based on the random access procedure state. The system dynamically allocates resources for the first data block during random access, then separately allocates resources for the second data block after access completion. This dynamic approach optimizes transmission efficiency while managing resource allocation complexity through structured, state-dependent resource assignment.
Data Source
AI summary
A base station (110) transmits system information that indicates to a wireless device (120) that the wireless device (120) is permitted to transmit respective blocks stored at the wireless device (120) during and after a random access procedure (200). The wireless device (120) performs the random access procedure (200) to the base station (110). The wireless device (120) transmits a first block of data stored at the wireless device (120) to the base station (110) during the random access procedure (200) while withholding a second block of data stored at the wireless device (120) from transmission to the base station (110) until after completion of the random access procedure (200). The base station (110), receives the blocks of data during and after the random access procedure (200), respectively.