Base Station Paging Occasion Control for 5G Uplink Coverage
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Solution Overview
Problem
The 5G communication system faces uplink coverage issues due to the use of high frequency bands, necessitating enhancements in paging mechanisms to improve coverage and efficiency.
Innovation Solution
A method and apparatus for paging in a base station that involves transmitting SystemInformationBlock1, receiving a paging message from the second base station or AMF, and determining the Paging-Occasion based on included information to transmit an RRC paging message through a paging channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high frequency bands are used for 5G communication, then data rate is improved, but uplink coverage deteriorates
Solution Approach 1:
The base station is divided into a central unit and multiple distributed units, allowing paging messages to be transmitted through multiple spatial paths and distributed antenna elements, which mitigates the coverage limitation of high frequency bands by segmenting the transmission function across multiple locations
Solution Approach 2:
A paging message transmission method is introduced as an intermediary mechanism that enables efficient user notification without requiring continuous uplink communication, thereby addressing coverage problems by using downlink-only paging channels that are more reliable at high frequencies
2Reliability
If paging messages are transmitted frequently, then user notification reliability is improved, but network signaling overhead increases
Solution Approach 1:
The system uses periodic DRX (Discontinuous Reception) cycles where user equipment wakes up at predetermined intervals to check for paging messages. This periodic action ensures reliable notification while minimizing network signaling overhead by transmitting pages only at these scheduled intervals rather than continuously
Solution Approach 2:
The base station determines and transmits paging occasion information in advance through SystemInformationBlock1, allowing user equipment to prepare and wake up at the correct time. This preliminary action ensures reliable page delivery while reducing overhead by avoiding repeated transmissions of paging configuration information
3Reliability
If user equipment monitors paging continuously, then paging reception reliability is improved, but power consumption increases
Solution Approach 1:
User equipment is configured to monitor paging occasions periodically based on DRX cycles rather than continuously. The equipment enters sleep mode between paging occasions, significantly reducing power consumption while maintaining reliable paging reception by checking for messages at predetermined intervals when the base station is guaranteed to transmit pages
4Productivity
If paging occasions are determined dynamically, then paging efficiency is improved, but device complexity increases
Solution Approach 1:
The base station determines paging occasion indices in advance based on user equipment identity and transmits this configuration information through SystemInformationBlock1 before actual paging occurs. This preliminary determination simplifies the user equipment's task to merely monitoring predetermined time-frequency resources, improving paging efficiency while minimizing device complexity by avoiding real-time calculations
Data Source
AI summary
method and apparatus for paging is provided. Method of base station for paging includes transmitting SystemInformationBlock1, receiving a paging message from the second base station or AMF, determining the index of the Paging-Occasion based at least in part on the information included in the paging message and transmitting an RRC paging message through a paging channel to the paging-occasion determined based on the index of the paging-occasion and the PF.