Idle State Small Data Transmission via Random Access
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Solution Overview
Problem
User terminals in idle states of cellular communication systems face inefficiencies in network load and battery consumption when transitioning to connected states to transmit small amounts of data, as they need to perform a random access procedure.
Innovation Solution
The user terminal performs a random access procedure in the idle state, transmitting a small amount of data and ending the procedure without transitioning to the connected state, while holding a terminal identifier for identification and potentially receiving parameters for the random access signal, allowing efficient data transmission without full state transition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the user terminal transitions to the connected state to transmit small amount of data, then the data transmission capability is improved, but the network load and battery consumption increase
Solution Approach 1:
The patent applies partial action by allowing the user terminal to transmit small amounts of data while remaining in the idle state, performing only the necessary random access procedure without transitioning to the connected state. This partial transmission approach resolves the contradiction by enabling data transmission capability for small payloads while avoiding the full state transition that would increase battery consumption and network load
2Reliability
If the user terminal transitions to the connected state to transmit small amount of data, then the data transmission capability is improved, but the network load increases
Solution Approach 1:
The patent enables partial data transmission functionality by allowing small data packets to be sent during the random access procedure in idle state, without requiring full connected state establishment. This resolves the network load issue by avoiding the overhead of complete connection setup while still providing necessary data transmission capability
3Use of energy by moving object
If the user terminal remains in the idle state to save battery, then the battery consumption is reduced, but the data transmission capability is limited
Solution Approach 1:
The patent extends the data transmission capability of the idle state by allowing small data packets to be transmitted during the random access procedure. This resolves the contradiction by providing partial data transmission functionality without requiring transition to connected state, thus maintaining low battery consumption while improving transmission capability for small payloads
Data Source
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AI summary
A communication control method according to a first aspect is used in a cellular communication system including a user terminal operating in either one of states, a connected state or an idle state. The communication control method comprises a step of performing, by UE 100, a random access procedure for a cell, in the idle state. The step of performing the random access procedure includes the steps of: transmitting, by the UE 100, a small amount of data to the cell; and ending, by the UE 100, the random access procedure without transitioning to the connected state, after transmitting the small amount of data.