Reference Signal Frequency Band Determination for Wireless Synchronization
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently transmitting and receiving reference signals, particularly in idle or inactive states, which affects initial access and paging procedures in 5G communication systems.
Innovation Solution
A method and apparatus that determine the transmission frequency band of a reference signal based on initial frequency bands, control resource sets, or paging search spaces, enabling time and frequency synchronization between user equipment and base stations for effective paging message transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reference signals are transmitted in idle or inactive states for initial access and paging procedures, then user equipment can achieve time and frequency synchronization, but transmission efficiency deteriorates due to unnecessary signal transmission when UE is not actively communicating
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the transmission parameters of reference signals based on the UE's state (idle, inactive, or connected). The base station modifies transmission frequency, power, and resource allocation according to whether the UE is performing initial access, monitoring paging, or active communication, thereby optimizing the balance between reliability and transmission efficiency across different operational states
2Reliability
If reference signals are continuously transmitted to maintain synchronization, then time and frequency synchronization is maintained, but energy consumption increases for both base station and user equipment
Solution Approach 1:
The patent implements periodic action by transmitting reference signals at specific intervals rather than continuously. The transmission is scheduled periodically based on the UE's state and requirements, allowing the system to maintain synchronization capability while significantly reducing energy consumption compared to continuous transmission. The periodicity is adjusted according to the UE's operational state and mobility characteristics
3Area of stationary object
If reference signals are transmitted across all frequency bands, then comprehensive coverage is achieved, but system complexity increases due to multiple frequency band management
Solution Approach 1:
The patent applies local quality by assigning different reference signal transmission characteristics to different frequency bands based on local requirements. Each frequency band is configured with appropriate transmission parameters, resource allocation, and coverage areas specific to its characteristics and service requirements, rather than applying a uniform configuration across all bands. This reduces overall system complexity while maintaining comprehensive coverage
Data Source
AI summary
A method performed by a user equipment (UE) in a wireless communication system is provided. The method includes determining a transmission frequency band of a reference signal based on at least one of an initial frequency band for an initial access procedure, a control resource set (CORESET) configured for the UE using a master information block (MIB), or a CORESET associated with a paging search space set for monitoring a paging message, wherein the reference signal is received by the UE in an IDLE state or an INACTIVE state, receiving, from a base station (BS), the reference signal based on the transmission frequency band of the reference signal, performing time synchronization and frequency synchronization with the BS based on the reference signal, and receiving, from the BS, the paging message including an identifier of the UE based on the time synchronization and frequency synchronization.