Electronic device and method for upgrading virtualized network function in network function virtualization environment

An electronic device configured to perform functions of a virtual network function manager (VNFM) of management and orchestration (MANO), comprising:

• at least one transceiver;
• at least one processor, comprising processing circuitry, coupled to the at least one transceiver;
• and
• memory storing instructions that, when executed by the at least one processor individually and/or collectively, cause the electronic device to:
• receive, from an operator through network function virtualization orchestrator (NFVO), an upgrade request of virtual network function;
• transmit, to the VNF, a request message for a software (SW) upgrade;
• receive, from the VNF, a response message for the SW upgrade;
• transmit, to the VNF, a task query message requesting a task type for the SW upgrade;
• receive, from the VNF, a task response message including information on the task type;
• and
• perform a task according to the task type for the SW upgrade based on the task response message.

An electronic device of a virtual network function (VNF), the electronic device comprising:

• at least one transceiver;
• and
• at least one processor, comprising processing circuitry, coupled to the at least one transceiver;
• and
• memory storing instructions that, when executed by the at least one processor individually and/or collectively, cause the electronic device to:
• receive, from a virtual network function manager (VNFM) of management and orchestration (MANO), a request message for a software (SW) upgrade;
• transmit, to the VNFM, a response message for the SW upgrade;
• receive, from the VNFM, a task query message for requesting a task type for the SW upgrade;
• and
• transmit, to the VNFM, a task response message including information on the task type.