Section: 4.17.12.3 Binding created as part of service request
Content: If the NF service consumer can also be as a NF service producer for later communication from the contacted producer, a service request sent to the producer may include binding indication. NOTE: This clause only applies to an AMF, V-SMF or I-SMF as NF service consumer sending requests to an SMF and to an AMF as NF service consumer sending requests to an I-SMF or V-SMF, in step 1 unless further usage has been defined in stage 3. Implicit subscriptions are not described in this clause. Figure 4.17.12.3-1: Binding created as part of service request 1. Instance A, as an NF service consumer sends a service request using either Direct Communication or Indirect communication via SCP and Instance B is selected as NF service producer. If Instance A can also be NF service producer for later communication for the concerned data context, it may include binding indication referring to NF service instance, NF service set, NF instance or NF Set as specified in Table 6.3.1.0-1 of TS 23.501[ System architecture for the 5G System (5GS) ]  [2] in the request sent to the NF service producer; the binding indication shall be associated with an applicability indicating "other service" and include the service name. In this case, if indirect communication is used, the SCP sends to the Instance B the service request including the binding indication. 2. Instance B as the NF service producer sends a response to the NF service consumer. 3. When Instance B as NF service consumer needs to invoke the service provided by Instance A, Instance B sends a request using the binding indication received in step 1 as described in Steps 3-4 in Figure 4.17.12.2-1 with the following difference: - Based on the received binding indication, if delegated discovery is not used, the Instance B may need to discover the corresponding endpoint address of the Instance A.