SSB Beam Time-Domain Allocation for 5G Interference Mitigation
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Solution Overview
Problem
The increasing scale of 5G networks leads to significant co-channel interference on Synchronization Signal/PBCH Block (SSB) beams, affecting user perception indicators such as access, handovers, and call drops.
Innovation Solution
A method for SSB beam resource configuration that involves acquiring interference statuses, sorting SSB beams based on these statuses to determine a time domain resource allocation order, and performing time domain resource allocation using obtained sequences to optimize SSB beams, reducing interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the scale of 5G networks increases to provide broader coverage and more users, then network capacity and coverage are improved, but co-channel interference on SSB beams becomes more significant
Solution Approach 1:
The patent segments the time domain resources into different time slots and assigns different SSB beams to different time slots. This segmentation in the time domain separates the transmission of multiple SSB beams, reducing their mutual interference while maintaining comprehensive coverage. Each SSB beam is transmitted in its designated time slot, preventing simultaneous interference that would occur with spatial multiplexing alone.
Solution Approach 2:
The patent implements periodic SSB beam sweeping where different SSB beams are transmitted in a periodic sequence across multiple time slots. This periodic transmission pattern allows the system to cycle through multiple beams systematically, ensuring each beam receives adequate transmission opportunities while maintaining temporal separation that reduces interference. The periodic nature ensures consistent coverage while managing interference through structured time-domain scheduling.
2Ease of manufacture
If traditional random resource allocation is used for SSB beams, then resource allocation simplicity is maintained, but interference between SSB beams increases
Solution Approach 1:
The patent applies preliminary action by pre-configuring time domain resource sequences for different SSB beams before actual transmission. The network device determines and assigns specific time slot patterns to each SSB beam in advance, based on beam characteristics and interference considerations. This pre-planned resource allocation eliminates the need for complex real-time random allocation while ensuring interference-free transmission, as each beam knows its designated time slots beforehand.
Solution Approach 2:
The patent changes the resource allocation parameter from random selection to deterministic time domain assignment. Instead of using random resource allocation parameters, the system uses structured time slot indices and periodicity parameters that are systematically assigned to different SSB beams. This parameter transformation maintains allocation simplicity while fundamentally reducing interference through controlled temporal separation.
3Speed
If SSB beams are transmitted simultaneously to improve coverage speed, then coverage establishment is accelerated, but interference between beams increases
Solution Approach 1:
The patent introduces dynamics by implementing time-varying SSB beam transmission where different beams are activated at different time slots rather than static simultaneous transmission. The system dynamically schedules beam transmission based on time domain resource sequences, allowing flexible adaptation of which beams are active at any given time. This dynamic approach maintains fast coverage establishment by ensuring all beams are transmitted within a short sweeping period while preventing interference through temporal separation.
Data Source
AI summary
A method for Synchronization Signal/PBCH Block (SSB) beam resource configuration, a network device, a terminal device, and a storage medium are disclosed. The method may include: acquiring interference statuses of a plurality of SSB beams in a target area; sorting the plurality of SSB beams according to the interference statuses to obtain a time domain resource allocation order; traversing and collecting statistics on time domain resources in the target area, and obtaining a plurality of time domain resource sequences according to the time domain resources, the interference statuses, and the time domain resource allocation order, each of the time domain resource sequences corresponds to one SSB beam; and performing time domain resource allocation for the plurality of SSB beams according to the time domain resource sequences.