t the SMF would need to contact to process the call: SMF<->NRF [10]/nnrf-disc/v1/nf-instances?dnn=ims&requester-nf-type=SMF&target-nf-type=PCF HyperText Transfer Protocol 2 Stream: DATA, Stream ID: 3, Length 714 JavaScript Object Notation: application/json v Object Member Key: validityPeriod Number value: 3600 Key: validityPeriod Member Key: infInstances Array Object Member Key: infInstanceId String value: cbd2bf17-5e96-41f1-871d-0e671aeeef79 Key: infInstanceId Member Key: nfType String value: PCF Key: nfType Member Key: nfStatus String value: REGISTERED Key: nfStatus Member Key: plmnList Member Key: fqdn Member Key: ipv4Addresses Array String value: 10.193.20.130 Key: ipv4Addresses Member Key: priority Number value: 10 Key: priority Member Key: capacity Member Key: locality String value: Locp Key: locality Member Key: pcfInfo Member Key: recoveryTime String value: 2020-06-04T01:28:51.252Z Key: recoveryTime > Member Key: infServices Key: infInstances Figure 7.18 - Packet capture SMF to NRF discover message Packet Core Procedures Figure 7.19 shows the policy update message exchanged between the SMF and the PCF: SMF->PCF 3]Policy Update Message from SMF Hyper Text Transfer Protocol 2 Stream: DATA, Stream ID: 3, Length 505 Length: 505 Type: DATA (0) Flags: 0x01 = Reserved: 0x0 .000 0000 0000 0000 0000 0000 0000 0011 = Stream Identifier: 3 [Pad Length: 0] Data: 7b2261636365737354797065223a22334750505f41434345... JavaScript Object Notation: application/json Object Member Key: accessType Member Key: ipv6AddressPrefix String value: 2001:4870:10:bd4::/64 Key: ipv6AddressPrefix Member Key: numOfPackFilter Number value: 16 Key: numOfPackFilter Member Key: ratType String value: NR Key: ratType Member Key: repPolicyCtrlReqTriggers > Member Key: servNfId > Member Key: servingNetwork > Member Key: ueTimeZone > Member Key: userLocationInfo Figure 7.19: Packet capture SMF to PCF policy update message Note the different types of information exchanged between the two network functions. Next, we'll continue with the IMS PDU session