NR NAS description

Non Access Stratum (NAS) procedures in the 5G system (5GS)

24.501 v16.4.0

Control plane between UE and AMF at the radio interface

23.501 5G System Architecture
§4.2 Architecture reference model NSSF AUSF UDM AMF SMF PCF AF UE NG-RAN UPF DN N13 N22 N12 N8 N10 N11 N7 N5 N15 N1 N2 N4 N3 N6 Network Slice Selection Function Authentication Server Function Unified Data Management Access and Mobility Management Session Management Function Policy Control Function Application Function User Equipment Radio Access Network User Plane Function Data NetworkOperator servicesInternet access

N2
Reference point between the (R)AN and the AMF NGAP
NR IWK EPC

N26
Reference point between the MME and the AMF 29.274

§9.7 5GS mobility management messages
Increasing message type
Message type Direction Message Reference
0x41 65 to Network Registration request 8.2.6
0x42 66 to UE Registration accept 8.2.7
0x43 67 to Network Registration complete 8.2.8
0x44 68 to UE Registration reject 8.2.9
0x45 69 to Network Deregistration request (UE originating) 8.2.12
0x46 70 to UE Deregistration accept (UE originating) 8.2.13
0x47 71 to UE Deregistration request (UE terminated) 8.2.14
0x48 72 to Network Deregistration accept (UE terminated) 8.2.15
0x4c 76 to Network Service request 8.2.16
0x4d 77 to UE Service reject 8.2.18
0x4e 78 to UE Service accept 8.2.17
0x4f 79 to Network Control plane service request 8.2.30
0x51 81 to UE Network slice-specific authentication command 8.2.31
0x52 82 to Network Network slice-specific authentication complete 8.2.32
0x53 83 to UE Network slice-specific authentication result 8.2.33
0x54 84 to UE Configuration update command 8.2.19
0x55 85 to Network Configuration update complete 8.2.20
0x56 86 to UE Authentication request 8.2.1
0x57 87 to Network Authentication response 8.2.2
0x58 88 to UE Authentication reject 8.2.5
0x59 89 to Network Authentication failure 8.2.4
0x5a 90 to UE Authentication result 8.2.3
0x5b 91 to UE Identity request 8.2.21
0x5c 92 to Network Identity response 8.2.22
0x5d 93 to UE Security mode command 8.2.25
0x5e 94 to Network Security mode complete 8.2.26
0x5f 95 to Network Security mode reject 8.2.27
0x64 100 both 5GMM status 8.2.29
0x65 101 to UE Notification 8.2.23
0x66 102 to Network Notification response 8.2.24
0x67 103 to Network UL NAS transport 8.2.10
0x68 104 to UE DL NAS transport 8.2.11
Nb = 32

§9.7 5GS session management messages
Increasing message type
Message type Direction Message Reference
0x61 97 to Network PDU session establishment request 8.3.1
0x62 98 to UE PDU session establishment accept 8.3.2
0x63 99 to UE PDU session establishment reject 8.3.3
0x65 101 to UE PDU session authentication command 8.3.4
0x66 102 to Network PDU session authentication complete 8.3.5
0x67 103 to UE PDU session authentication result 8.3.6
0x69 105 to Network PDU session modification request 8.3.7
0x6a 106 to UE PDU session modification reject 8.3.8
0x6b 107 to UE PDU session modification command 8.3.9
0x6c 108 to Network PDU session modification complete 8.3.10
0x6d 109 to Network PDU session modification command reject 8.3.11
0x71 113 to Network PDU session release request 8.3.12
0x72 114 to UE PDU session release reject 8.3.13
0x73 115 to UE PDU session release command 8.3.14
0x74 116 to Network PDU session release complete 8.3.15
0x75 117 both 5GSM status 8.3.16
Nb = 16

23.502 Registration procedure
Registration request Authentication request Authentication response Security mode command Security mode complete Registration accept Registration complete Service request Service accept PDU session establishment request PDU session establishment accept UE AMF AUSF