Hello dears,
Nice guide to 5G low, mid, and high band speeds:
I like the cake analogy used by T-Mobile.
Low - MTC & IoT
Mid - jack of all trades
High - URLLC, eMBB and specific test cases
Congestion within the lower operating bands, combined with a requirement for wider channel bandwidths has led to the inclusion of both low and high operating bands for 5G.
The good RF propagation associated with the lower operating bands allows those bands to be used for coverage solutions. The relatively small channel bandwidths within those bands means that there is a requirement for 5G to focus upon improving spectrum efficiency. The lower operating bands can be used for all 5G use cases, although the relatively small channel bandwidths limit the peak connection throughputs achieved by eMBB applications.
The wide channel bandwidths available in the higher operating bands allows those bands to be used for high throughput, capacity solutions. The relatively poor RF propagation within those bands means there is a requirement to focus upon improving the link budget.
5G has been standardized to provide sufficient flexibility to address the challenges associated with both the low and high operating bands,
Characteristics associated with the high operating bands include:
- Limited RF propagation leading to small cells and noise limited coverage conditions
- Increased potential for wider channel bandwidths.
- The higher subcarrier spacing associated with the higher operating bands lead to a shorter sub frame duration and provide the potential for lower latencies
There are two frequency Ranges FR1, FR2, the two ranges are differing in BW and subcarrier spacing.
- FR1: 410 MHz –7.125 GHz
- BW: 5~100 MHz
- FR2: 24.25 GHz –52.6 GHz
- BW:50~400 MHz
5G can be classified to 3 layers as shown in the below image.
- Coverage Layer: Sub 1GHz
- Capacity Layer: 1 GHz ~ 7.125 GHz
- High Throughput: 24.25 GHz~ 52.6 GHz
Credits: 