5G Terminal Connection State Control for Ultra-Low-Latency Location
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Solution Overview
Problem
Existing 5G wireless communication systems face challenges in providing high-precision, ultra-low latency location information services when terminals are in an idle state, as they cannot meet the required service response time due to discontinuous reception cycles.
Innovation Solution
The method involves controlling the terminal's connection mode by determining an 'always connected' state through an access and mobility management function (AMF) and configuring a timer value to maintain the connection for location information measurement, ensuring the terminal remains in a connected state during service requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal is in idle state to save energy, then energy consumption is reduced, but service response time increases due to DRX cycle interruptions
Solution Approach 1:
The patent dynamically adjusts the terminal's connection state based on service requirements. When ultra-low latency location service is needed, the terminal transitions from idle to connected state, allowing real-time location reporting. When service is not needed, the terminal remains in idle state to save energy. This dynamic state adjustment resolves the contradiction between energy saving and response time.
Solution Approach 2:
The patent changes the connection state parameter (idle vs connected) of the terminal based on service requirements. By setting the terminal to connected state with RRC connection during location service, the system achieves ultra-low latency response. The parameter change allows the terminal to break out of DRX cycle limitations and provide continuous location information.
2Device complexity
If the terminal is in idle state, then device complexity is reduced, but measurement precision of location information deteriorates due to discontinuous reception
Solution Approach 1:
The patent dynamically switches the terminal between idle and connected states based on location service requirements. During location measurement, the terminal is in connected state enabling continuous reception and precise location reporting. This dynamic approach maintains simple idle operation when not needed while achieving high precision when required.
3Loss of time
If the terminal remains in connected state to provide continuous service, then service response time is improved, but energy consumption increases
Solution Approach 1:
The patent uses periodic state transitions rather than continuous connected state. The terminal alternates between idle and connected states based on location service requirements. This periodic action allows the terminal to achieve ultra-low latency response when needed while minimizing energy consumption by returning to idle state when service is not required.
Data Source
AI summary
The present disclosure relates to a communication method and system for converging a 5th-Generation (5G) communication system for supporting higher data rates beyond a 4th-Generation (4G) system with a technology for Internet of Things (IoT). The present disclosure may be applied to intelligent services based on the 5G communication technology and the IoT-related technology, such as smart home, smart building, smart city, smart car, connected car, health care, digital education, smart retail, security and safety services. A method of an access and mobility management function (AMF) of a wireless communication system according to one embodiment of the present disclosure is characterized by comprising the steps of: determining a connection mode of a terminal for a location information service of the terminal; transmitting, to a base station, a first message including at least one of information requesting activation of the connection mode and information on a time related to the connection mode; and receiving a second message including information on whether the connection mode is activated from the base station in response to the first message, wherein a timer value for maintaining a connection state of the terminal is configured to measure location information of the terminal on the basis of the at least one of the information requesting activation of the connection mode and the information on a time related to the connection mode.