SSB Broadcast for Non-Standard Cell Detection
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Solution Overview
Problem
In 5G telecommunications, terminals face challenges in selecting and reselecting cells with non-standard SSB periodicities, leading to inefficiencies in power consumption and latency due to the need for systematic scans, which hinders the implementation of advanced sleep modes in base stations.
Innovation Solution
A method where base stations broadcast SSB blocks with a first periodicity value, including information about neighboring cells' second periodicity values and frequency locations, allowing terminals to synchronize and efficiently select or reselect higher priority cells, even if they operate with periodicities higher than the default synchronization window.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals perform systematic scans to detect cells with non-standard SSB periodicities, then cell detection capability is improved, but power consumption and latency increase
Solution Approach 1:
The base station performs preliminary action by broadcasting the SSB periodicity information of neighboring cells in advance through system information blocks. This allows terminals to obtain detection parameters before actually searching for cells, enabling them to configure their detection windows appropriately and avoid exhaustive systematic scans, thereby reducing power consumption while maintaining reliable cell detection capability.
2Reliability
If terminals perform systematic scans to detect cells with non-standard SSB periodicities, then cell detection capability is improved, but latency increases
Solution Approach 1:
The base station provides preliminary action by broadcasting the SSB periodicity information of neighboring cells in advance through system information blocks. This allows terminals to obtain detection parameters before actually searching for cells, enabling them to configure their detection windows appropriately and avoid exhaustive systematic scans, thereby reducing latency while maintaining reliable cell detection capability.
3Loss of energy
If base stations use advanced sleep modes, then energy efficiency is improved, but cell selection efficiency deteriorates due to non-standard SSB periodicities
Solution Approach 1:
The system information block acts as an intermediary that carries SSB periodicity information from the base station to terminals. This intermediary mechanism enables terminals to efficiently select cells even when base stations operate with non-standard SSB periodicities for energy saving, thus resolving the contradiction between energy efficiency and cell selection efficiency by providing the necessary detection parameters without requiring terminals to perform exhaustive scans.
Data Source
AI summary
A communication method implemented by a base station having at least one cell and forming part of a mobile access network including neighbouring cells of the cell. The method includes broadcasting blocks referred to as SSB blocks at a first periodicity value for synchronising a terminal and for allowing said terminal to receive SIBs of which at least one of said SIBs includes an identifier of at least one neighbouring cell, a second periodicity value of SSB blocks broadcast by said neighbouring cell and a frequency position of an SSB block of said neighbouring cell.