When I did my 5G presentation back in Feb., I explained about Ultra Dense Networks (UDN) that will be a main feature of future traffic hotspots. I have also blogged about Qualcomm having tested 1000 small cells in a square km. Some operators are already running out of spectrum with traditional deployments in hotspots. They are already making their cells smaller (but not yet using Small cells) thereby having less users in each cell. This may not be enough so the approach likely to be taken is:
- Offload to WiFi
- Aggregate WiFi with LTE (different approaches including LTE-U, LAA and LWA)
- Use Small cells and C-RAN
- Multi technology Carrier Aggregation
- Beamforming (and massive MIMO)
The above picture is from a presentation (embedded below) by ZTE in the LTE World Summit. Its a good attempt to show different technologies, the year they are expected to go mainstream, whether they are TDD or FDD and if they will form part of 5G.
Anyway, here is the presentation. There is some interesting information on C-RAN, D-RAN results and fronthaul too.