Jun 12 2021, 10:37 PM
QUOTE(lurkingaround @ Jun 12 2021 @ 01:46 PM)
Likely because a 4G LTE cell tower has a maximum range of only 5km/3miles while a 3G/2G cell tower has a max range of 32km/20 miles, wrt a handphone receiving voice calls/SMS. The larger coverage by 3G/2G cell towers is crucial in rural areas, eg emergency 999 calls.
Why 4G LTE cell towers have such a short range.? = likely because it is a pure Internet protocol like VoIP = needs much more power to transmit over long range of 32km/20 miles = can be harmful to the health of nearby residents. .......
https://www.zdnet.com/article/nbn-approache...f-7-kilometres/ - NBN-approaches-1Gbps-using-mmWave-5G-over-distances-of-7-kilometres - 12 Jan 2021
= using more powerful 5G uni-directional mmWave(24GHz - 86GHz) transceivers for Fixed Wireless Internet. Afaik, max range of a normal 5G mmWave multi-directional (= low-power) smallcell base-station is about 400m only - normally only deployed in downtown city areas, shopping malls, stadiums, concert halls or places with high foot-traffic.
Why 4G LTE cell towers have such a short range.? = likely because it is a pure Internet protocol like VoIP = needs much more power to transmit over long range of 32km/20 miles = can be harmful to the health of nearby residents. .......
https://www.zdnet.com/article/nbn-approache...f-7-kilometres/ - NBN-approaches-1Gbps-using-mmWave-5G-over-distances-of-7-kilometres - 12 Jan 2021
= using more powerful 5G uni-directional mmWave(24GHz - 86GHz) transceivers for Fixed Wireless Internet. Afaik, max range of a normal 5G mmWave multi-directional (= low-power) smallcell base-station is about 400m only - normally only deployed in downtown city areas, shopping malls, stadiums, concert halls or places with high foot-traffic.
QUOTE(joshhd @ Jun 12 2021, 08:47 PM)
Err... This statement not so accurate.
The frequency bands for 2G, 3G and 4G ranges as low as 700MHz all the way up to 2600MHz,
lower frequency = wider coverage, commonly used in areas with less users, like rural areas
higher frequency = smaller coverage, commonly used in dense areas
So it is not accurate to overgeneralise coverage range solely based on the mobile generation alone, like 2G, 3G, 4G or 5G. There are many factors needs to be considered too, especially the band frequency, technical modulation, location, surroundings, obstructions, and so on.
Let's say if the 3G 2100MHz tower is being refarmed/repurposed to 4G 2100MHz, you'd still get similar or better coverage performance like what you had on 3G network also.
As for 5G, it has sub-1GHz bands, sub-6GHz bands and mmWave,
For 5G, if the frequency band uses mmWave (24GHz onwards), definitely the range won't go far. It could be around 200-400 metres per cell site.
To achieve wider coverage on mmWave, you'll need to deploy more cell sites to cover the large area.
.The frequency bands for 2G, 3G and 4G ranges as low as 700MHz all the way up to 2600MHz,
lower frequency = wider coverage, commonly used in areas with less users, like rural areas
higher frequency = smaller coverage, commonly used in dense areas
So it is not accurate to overgeneralise coverage range solely based on the mobile generation alone, like 2G, 3G, 4G or 5G. There are many factors needs to be considered too, especially the band frequency, technical modulation, location, surroundings, obstructions, and so on.
Let's say if the 3G 2100MHz tower is being refarmed/repurposed to 4G 2100MHz, you'd still get similar or better coverage performance like what you had on 3G network also.
As for 5G, it has sub-1GHz bands, sub-6GHz bands and mmWave,
For 5G, if the frequency band uses mmWave (24GHz onwards), definitely the range won't go far. It could be around 200-400 metres per cell site.
To achieve wider coverage on mmWave, you'll need to deploy more cell sites to cover the large area.
Looks like you are correct, ie the celcos can choose the power-setting for their 4G/3G/2G cell towers to have different range depending on the deployment area, eg urban/city or rural areas. My apologies. .......
https://en.wikipedia.org/wiki/LTE_(telecomm...ation)#Features - 4G LTE
"Support for cell sizes from tens of metres radius (femto and picocells) up to 100 km (62 miles) radius macrocells. In the lower frequency bands to be used in rural areas, 5 km (3.1 miles) is the optimal cell size, 30 km (19 miles) having reasonable performance, and up to 100 km cell sizes supported with acceptable performance. In the city and urban areas, higher frequency bands (such as 2.6 GHz in EU) are used to support high-speed mobile broadband. In this case, cell sizes may be 1 km (0.62 miles) or even less."
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