Early Data Transmission in Random Access for IoT
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Solution Overview
Problem
Current mobile communication systems do not support early data transmission during the random access procedure in machine-type communication (MTC) and Internet of Things (IoT) services, lacking a mechanism to efficiently transmit data using predetermined messages.
Innovation Solution
A communication control method that allows for early data transmission by transmitting information on whether to perform data transmission using a predetermined message during the random access procedure, enabling the user equipment to determine based on received information whether to initiate the transmission, even in a state where the RRC connection is released or suspended.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If early data transmission is enabled during random access procedure, then data transmission efficiency is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The patent applies preliminary action by enabling the UE to determine whether to perform early data transmission before actually transmitting data during the random access procedure. The network node provides information in advance (in the message for transitioning RRC state) that allows the UE to pre-determine the data transmission decision, thus improving efficiency without requiring complex real-time control mechanisms during the actual transmission phase.
2Use of energy by moving object
If early data transmission is performed during random access procedure, then power consumption is reduced by avoiding full RRC connection, but transmission reliability may deteriorate due to simplified protocol state
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the RRC connection state based on the determined need for early data transmission. The UE transitions to a predetermined RRC state (released or suspended connection) when early data transmission is determined to be sufficient, saving power. When full reliability is needed, the UE can transition to complete RRC connected state, thus balancing power consumption and reliability through state parameter changes.
3Loss of information
If information for early data transmission determination is provided in RRC transition message, then signaling overhead is reduced, but message complexity increases
Solution Approach 1:
The patent applies merging by combining the early data transmission determination information with the existing RRC transition message that is already being exchanged between the network node and UE. Instead of creating separate dedicated signaling messages for early data transmission control, the patent integrates this functionality into the existing message flow, thus reducing overall signaling overhead while accepting increased message structure complexity.
Data Source
AI summary
A communication control method is used in a user equipment that performs a predetermined data transmission in which uplink user data is transmitted during a random access procedure. The method comprises receiving, by the user equipment from a network node, a message including information related to the predetermined data transmission, the message being a message for transitioning the user equipment from an RRC connected state to a predetermined RRC state; transitioning, by the user equipment, from the RRC connected state to the predetermined RRC state in response to receiving the message; and determining, by the user equipment, whether to perform the predetermined data transmission based on the information included in the message. The predetermined RRC state is a state in which an RRC connection is released or suspended.