Recently 3GPP has shared the Non-stand Alone 5G NR(New radio) in Rel15. I would write an article on Advantage of 5G over legacy LTE.
Major Goals for 5G:- There are many targets that need to achieve in 5G NR but the most important is higher throughput(in Gbps) and low latency(<1ms).
Below are the some features which makes 5G better than LTE.
eMBB(Enhanced Mobile Broadband):- Just like 4G where we have eNodeB in 5G NR we have eMBB. eMBB is the throughput oriented part of 5G NR. It has following characteristics:-
1. Peak Data Rates- 10 to 20Gbps
2. 10000 times more traffic.
3. Supports macro and small cells.
4. Supports high mobility of about 500Kmph.
5. Helps in Network Energy saving by 100 times.
URLLC( Ultra reliable low latency communication):- In 5G NR E2E latency is <1ms while in LTE having around 20-100ms and sometimes >100ms in case of congestion. To decrease/Improve the latency in 5G NR we have a dynamic structure of carrier spacing where symbol length can change along with the slot length.
carrier spacing supported in 5G NR are: 15,30,60,120 and 240Khz.
In LTE there are fixed two slots/Subframe(0.5ms) but in 5G NR no. of slots may vary with carrier spacing( max upto 16 slots/subframe with 4.4microseconds).
Bandwith:- 5G NR supports a single carrier of 275RBs compared to 100 RBs in LTE.
Massive MIMO:- Greater than or equal to 8*8 MIMO we can implement in 5G NR.
Asynchronous HARQ:- Since we are using a flexible symbol length in 5G NR it also introduces a HARQ PDSCH feedback timing indicator. Consider a below example:
Since we have a slot length of 0.0625ms and suppose UE sends the ACK in N+4 slot then the overall time would be 0.0625*4=0.25ms.
So above example will ensure that the URLCC target is achieved.
Major Goals for 5G:- There are many targets that need to achieve in 5G NR but the most important is higher throughput(in Gbps) and low latency(<1ms).
Below are the some features which makes 5G better than LTE.
eMBB(Enhanced Mobile Broadband):- Just like 4G where we have eNodeB in 5G NR we have eMBB. eMBB is the throughput oriented part of 5G NR. It has following characteristics:-
1. Peak Data Rates- 10 to 20Gbps
2. 10000 times more traffic.
3. Supports macro and small cells.
4. Supports high mobility of about 500Kmph.
5. Helps in Network Energy saving by 100 times.
URLLC( Ultra reliable low latency communication):- In 5G NR E2E latency is <1ms while in LTE having around 20-100ms and sometimes >100ms in case of congestion. To decrease/Improve the latency in 5G NR we have a dynamic structure of carrier spacing where symbol length can change along with the slot length.
carrier spacing supported in 5G NR are: 15,30,60,120 and 240Khz.
In LTE there are fixed two slots/Subframe(0.5ms) but in 5G NR no. of slots may vary with carrier spacing( max upto 16 slots/subframe with 4.4microseconds).
Bandwith:- 5G NR supports a single carrier of 275RBs compared to 100 RBs in LTE.
Massive MIMO:- Greater than or equal to 8*8 MIMO we can implement in 5G NR.
Asynchronous HARQ:- Since we are using a flexible symbol length in 5G NR it also introduces a HARQ PDSCH feedback timing indicator. Consider a below example:
Since we have a slot length of 0.0625ms and suppose UE sends the ACK in N+4 slot then the overall time would be 0.0625*4=0.25ms.
So above example will ensure that the URLCC target is achieved.
Nice information
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