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1

January 2021

2

A-͠Ϫʪ͠Ϫϔ

ęn Aλʀ˸̋ϪʪʀϪЈλʪ įЮʪλЮ̋ʪй èʪч Uλ̋Юʪλϔ ˛-λ ߧ

A-Юʪλɇ˟ʪ

nʪ˛ʪλʪ͠ʀʪϔ 3

Table 1. Comparison between 4G and 5G

ęʪϪй-λ̪ k͠ʪλ˟ч k˛˛̋ʀ̋ʪ͠ʀч ࣦ Ǻߢߢߣ

A й̋ʒʪ λɇ͠˟ʪ -˛ ˛λʪδЈʪ͠ʀч ɵɇ͠ʒϔ ɇλʪ λʪδЈ̋λʪʒ ˛-λ ߧ

low-band

Coverage

Capacity

mid-band high- band

Illustrated comparison per 5G bands

4 ęn Aλʀ˸̋ϪʪʀϪЈλʪ įЮʪλЮ̋ʪй gNB 5GC

Opt. 2

eNB EPC

Opt. 1

ng-eNB 5GC

Opt. 5

eNB EPC

Opt. 3

en-gNB ng-eNB

Opt. 4

gNB 5GC ng-eNB

Opt. 7

gNB 5GC

LTE user plane

LTE control plane

MNSN

MNSNMNSN

NR user plane

NR control plane

EN-DC

NE-DCNGEN-DC

S1-US1-CNG-UNG-CS1-US1-C

X2-C X2-U

NG-UNG-CNG-UNG-CNG-UNG-C

Xn-C Xn-U Xn-C Xn-U

NR deployment architecture options

5

Table 2. MR-DC Lists

ù̋ϔϪϔ Aϔϔ-ʀ̋ɇϪʪʒ Aę

Aϔϔ-ʀ̋ɇϪʪʒ

ࣜkęࣦUAࣝ kŦA įΪϪ̋-͠ ߥ ࣜękࣦUAࣝ ߧA įΪϪ̋-͠ ߦ

UЈɇ̺ A-͠͠ʪʀϪ̋Ю̋Ϫч ࣜękęࣦUAࣝ ߧA įΪϪ̋-͠ ߩ

ęnࣦęn UЈɇ̺ A-͠͠ʪʀϪ̋Ю̋Ϫч

ʀɇ͠ ʀ-͗͗Ј̋͠ʀɇϪʪ й̋Ϫ˸ ߧ A-λʪ ࣜߧ

λʪδЈ̋λʪ͗ʪ͠Ϫ ˛-λ Ϫ˸̋ϔ -ΪϪ̋-͠ࡰ ̋Ϫ λʪδЈ̋λʪϔ ̺ʪϔϔ й-λ̪̺-ɇʒ й˸ʪ͠ ЈΪ˟λɇʒ̋͠˟ ɇ͠ ʪę9 ˛-λ ̋͠Ϫʪλй-λ̪̋͠˟ й̋Ϫ˸ Ϫ˸ʪ ęn

6

Opt. 3Opt. 3aOpt. 3x

S1-US1-US1-U

eNB EPC en-gNB MNSN S1-C X2-C

X2-UeNB

EPC en-gNB MNSN S1-C X2-C S1-U eNB EPC en-gNB MNSN S1-C X2-U X2-C S1-U

Control PlaneUser Plane

NR architecture variants of option 3

˜λ-͗ ɇ ʀ-͠Ϫλ-̺ Ϊ̺ɇ͠ʪ ΪʪλϔΪʪʀϪ̋Юʪࡰ Ϫ˸ʪ ʪę9 ̋ϔ ʀ-͠͠ʪʀϪʪʒ Ϫ- Ϫ˸ʪ kŦAࡰ ɇ͠ʒ Ϫ˸ʪ ʪࣦ͠˟ę9 -ΪʪλɇϪʪϔ й̋Ϫ˸ Ϫ˸ʪ ʪę9 Ю̋ɇ

ng-eNB

Opt. 4

gNB 5GC ng-eNB

Opt. 4a

gNB 5GC

MNSNMNSN

Xn-C Xn-U

NG-CNG-U

Xn-C

NG-CNG-UNG-U

Control PlaneUser Plane

NR architecture variants of option 4

7

˜λ-͗ ɇ ʀ-͠Ϫλ-̺ Ϊ̺ɇ͠ʪ ΪʪλϔΪʪʀϪ̋Юʪࡰ Ϫ˸ʪ ˟ę9 ̋ϔ ʀ-͠͠ʪʀϪʪʒ Ϫ- Ϫ˸ʪ ߧ

ng-eNB

Opt. 7

gNB 5GC ng-eNB

Opt. 7a

gNB 5GC ng-eNB

Opt. 7x

gNB 5GC

MNSNMNSNMNSN

NG-UNG-C

Xn-C Xn-U

NG-UNG-C

Xn-C

NG-UNG-C

Xn-C Xn-U NG-U

Control PlaneUser Plane

NR architecture variants of option 7

˜λ-͗ ɇ ʀ-͠Ϫλ-̺ Ϊ̺ɇ͠ʪ ΪʪλϔΪʪʀϪ̋Юʪࡰ Ϫ˸ʪ ͗ɇϔϪʪλ ͠˟ࣦʪę9 ̋ϔ ʀ-͠͠ʪʀϪʪʒ Ϫ- Ϫ˸ʪ ߧ

Ϫ˸ʪ ˟ę9 Ю̋ɇ Ǻ͠ ̋͠Ϫʪλ˛ɇʀʪ ˛-λ ɇ̺̺ -ΪϪ̋-͠ ߩ

8

ɇλʀ˸̋ϪʪʀϪЈλʪ Ϫ˸ɇϪ ʀ-͠Ϫɇ̋͠ϔ ęn nAę ɇϔ ɇ Ēę ɇ͠ʒ ߧ

Table 3. Comparison between deployment options

ęnࣦUA

nʪδЈ̋λʪʒ Aę kŦA ߧA ߧ

nʪδЈ̋λʪʒ nAę ʪę9ࡰ ʪࣦ͠˟ę9 ͠˟ࣦʪę9ࡰ ˟ę9 ˟ę9

Aęࣦ̺ʪЮʪ̺ ̋͠Ϫʪλй-λ̪̋͠˟

ǥ-ęn

Ϊ-ϔϔ̋ɵ̺ʪ й˸ʪ͠ ǥ-ęn ̋ϔ

ǥ-ęn

Ϊ-ϔϔ̋ɵ̺ʪ й˸ʪ͠ ǥ-ęn ̋ϔ

̋͠Ϫʪλ-Ϊʪλɇɵ̺̋̋Ϫч ę-Ϫ kɇϔч ę-Ϫ kɇϔч kɇϔч

9 èʪч Uλ̋Юʪλϔ ˛-λ ߧ

Aϔ ʀ-͗Ϊɇλʪʒ Ϫ- ߦ

ʪĒ99 ˛-ʀЈϔʪϔ -͠ ˸̋˟˸ ʒɇϪɇ λɇϪʪ ϔʪλЮ̋ʀʪϔ ϔЈʀ˸ ɇϔ ³U Ю̋ʒʪ- -λ ǥ̋λϪЈɇ̺ nʪɇ̺̋Ϫч ࣜǥnࣝࢴ AЈ˟͗ʪ͠Ϫʪʒ nʪɇ̺̋Ϫч ࣜAnࣝࡰ й˸̺̋ʪ

Examples utilizing URLLC

10

̺̋͗̋Ϫʪʒ ˛-λ͗ -˛ ̋ϔ-̺ɇϪ̋͠˟ ɇ ϔʪλЮ̋ʀʪ й̋Ϫ˸̋͠ ɇ ʀ-͗͗-͠ ̋͠˛λɇϔϪλЈʀϪЈλʪ ϔЈʀ˸ ɇϔ ĒЈ̺Ϫ̋ įΪʪλɇϪ-λ A-λʪ ęʪϪй-λ̪ ࣜĒįAęࣝ

Examples utilizing network slicing

11

λʪʒЈʀʪϔ Ϫ˸ʪ ʀ-ϔϪ -˛ ͗ɇ̋͠Ϫɇ̋̋͠͠˟ kŦA ɇ͠ʒ ʪ͠ɇɵ̺ʪϔ Ϫ˸ʪ ʪфΪʪʒ̋ʪ͠Ϫ ̋͠Ϫλ-ʒЈʀϪ̋-͠ -˛ ߧ

12

A͗-͠˟ Ϫ˸ʪ ϔʪЮʪλɇ̺ ęn ʒʪΪ̺-ч͗ʪ͠Ϫ -ΪϪ̋-͠ϔࡰ Ϫ˸̋ϔ ΪɇΪʪλ й̺̺̋ ˛-ʀЈϔ -͠ Ϫй- ͗-ϔϪ ΪλɇʀϪ̋ʀɇ̺ ͗̋˟λɇϪ̋-͠ ΪɇϪ˸ϔ Ϫ-йɇλʒ

͗ʪɇϔЈλʪ͗ʪ͠Ϫ λʪΪ-λϪࡰ ̋Ϫ ʒʪʀ̋ʒʪϔ Ϫ- Ϊʪλ˛-λ͗ ʪ̋Ϫ˸ʪλ ɇ ˸ɇ͠ʒ-Юʪλ -λ λʪʒ̋λʪʀϪ̋-͠ Ю̋ɇ ̋͠Ϫʪλ˛ɇʀʪ ɵʪϪйʪʪ͠ kŦA ɇ͠ʒ ߧ

gNB 5GC eNB N26

LTE UE/5G SA UE5G SA UE

NG

LegacyNR SA migration

EPC eNB EPC S1

LTE UE

S1

Migration architecture based on option 2.

13 (b) Migration using DSS on LTE band(a) NR re-farming on LTE band EPC gNB

5GCEPC

gNB 5GC

NR Re-farmingLTE/NR

DSS

Migration method on remaining LTE band

A ʒ̋ϔɇʒЮɇ͠Ϫɇ˟ʪ -˛ Ϫ˸̋ϔ ͗̋˟λɇϪ̋-͠ -ΪϪ̋-͠ ̋ϔ Ϫ˸ɇϪ ɇ ̺ɇλ˟ʪ ̋̋͠Ϫ̋ɇ̺ ̋͠ЮʪϔϪ͗ʪ͠Ϫ ̋ϔ ͠ʪʪʒʪʒ Ϫ- ϔʪϪЈΪ ͠ʪй ߧ

ߧ ʒʪΪ̺-ч͗ʪ͠Ϫ Јϔ̋͠˟ kęࣦUA ࣜ-ΪϪ̋-͠ ߥ

14 gNB NG eNB EPC S1 en-gNBeNB

X2XnX2

LTE UE5G NSA UE

LTE UE

5G NSA UE

LTE UE5G SA UE

LegacyMigration Phase I

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