Unlicensed Spectrum Allocation for Carrier Aggregation
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Solution Overview
Problem
Network congestion and reduced throughput occur due to RF interference when multiple network operators' base stations deploy devices in close proximity for license-assisted access (LAA) in unlicensed RF spectrum bands, and venue restrictions limit the deployment of multiple base stations.
Innovation Solution
A base station allocates different portions of the unlicensed RF spectrum band to multiple operator networks, reducing interference by using distinct frequency or time domains for each network, thereby enabling efficient carrier aggregation and reducing congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple base stations are deployed in close proximity for LAA, then network coverage and capacity are improved, but RF interference increases causing network congestion and reduced throughput
Solution Approach 1:
The unlicensed RF spectrum band is segmented into multiple distinct frequency or time domain resources that are allocated to different operator networks. This segmentation allows multiple base stations to operate in close proximity without causing harmful RF interference, as each operator uses dedicated resources rather than sharing the same spectrum simultaneously.
2Productivity
If multiple base stations are deployed for LAA, then network capacity is improved, but device complexity and deployment complexity increase due to venue restrictions
Solution Approach 1:
A single base station infrastructure is made multi-functional by enabling it to support multiple operator networks simultaneously through resource allocation. Instead of requiring separate base stations for each operator, one base station can serve multiple operators by allocating different unlicensed spectrum resources to each, reducing deployment complexity while maintaining network capacity.
3Adaptability or versatility
If unlicensed RF spectrum band is shared by multiple operators, then spectrum utilization is improved, but interference and congestion increase reducing signal quality
Solution Approach 1:
Different portions of the unlicensed RF spectrum band are allocated to different operator networks, creating localized quality assurance for each operator. Each operator receives dedicated frequency or time domain resources that guarantee signal quality without interference from other operators, while the overall spectrum utilization remains high through efficient allocation.
Data Source
AI summary
A base station may allocate resources of an unlicensed radio frequency (RF) spectrum band among multiple operator networks, associated with different network operators, that use different licensed RF spectrum bands. The base station may receive downlink traffic destined for a user equipment. The base station may identify an operator network, of the multiple operator networks, associated with the user equipment. The base station may provide the downlink traffic to the user equipment using one or more unlicensed RF channels of the unlicensed RF spectrum band based on identifying the operator network and based on allocating the resources of the unlicensed RF spectrum band among the multiple operator networks.