| CPC H04W 76/11 (2018.02) [H04W 40/24 (2013.01); H04W 76/30 (2018.02)] | 18 Claims |

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18. A network node comprising a processor and a memory, the memory comprising instructions enabling the network node to implement an Application Function, AF, the network node being configured to, when implementing the AF, to perform:
transmitting, to a Network Exposure Function, NEF, a request for dynamically reserving or releasing a Reliable Data Service, RDS, port resource in association with a Non-Internet Protocol ‘IP’ Data Delivery, NIDD, configuration, the request containing an indication indicating whether the reserving or releasing of the RDS port resource requires confirmation with the terminal device; and
receiving, from the NEF, a response to the request.
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