• Test aggregated four low- and mid-band carriers across commercial standalone infrastructure
• Carrier aggregation on commercial networks shifts focus from peak speed to capacity optimisation
The fact
Optus and Ericsson have used four-component carrier aggregation to deliver 3.4Gbps downlink throughput on Optus' live 5G standalone network in Sydney. The test combined 900MHz, 2.1GHz, 2.3GHz and 3.5GHz spectrum across 220MHz of aggregated bandwidth, using commercial devices including Samsung Galaxy S26 Ultra handsets. The companies also recorded 200Mbps uplink using two-component carrier aggregation across FDD and TDD bands.
The assessment
The milestone is less a breakthrough in peak speed than a demonstration of increasingly granular spectrum optimisation on commercial 5G SA networks. Optus and Ericsson are positioning carrier aggregation as a practical capacity tool for dense urban traffic and fixed wireless access rather than a headline benchmarking exercise.
What to watch
Optus expanding multi-band aggregation beyond trial sites into CBDs, transport hubs and FWA deployments as part of its 5G Advanced rollout.
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