What is SCEF? The Service Capability Exposure Function or SCEF enables the 3GPP network to securely expose its services provided by the 3GPP network to 3rd party application servers. The end to end communication in a 3GPP IoT architecture, between the MTC application in the UE and the Application Server can happen in the following … Continue reading SCEF

3GPP & Internet Of Things

3GPP (Third Generation Partnership Project) is the standardization body that defines 2G/3G/4G and now 5G mobile communication. 3GPP defined a new UE category 0 in Release 12. The main objective was to reduce the device complexity compared to Cat-1 devices which were defined in Rel-8 and was used for LTE. In release 13 , eMTC/LTE-M … Continue reading 3GPP & Internet Of Things

CIoT – A Primer

Around 9 years back, one of us had an opportunity to work on a project where a client machine would send data to a server like machine periodically and all this over the legendary GPRS network. The client machine had a GPRS modem that would use AT commands to attach to the network and send … Continue reading CIoT – A Primer

SDN Controller Architecture

In the SDN primer blog post, we touched upon the basic building blocks of SDN. In this post we will try to outline how an ideal controller should look like taking a high level look at the SDN controller architecture. Please note that this is just a high level schema and a lot can be … Continue reading SDN Controller Architecture

Software Defined Networking (SDN) – A primer

Software Defined Networking or SDN is defined as the physical separation between network control plane and user plane. This architecture decouples the network control and forwarding functions enabling the network control to become directly programmable and the underlying infrastructure to be abstracted for applications and network services. The basic building blocks of a SDN based … Continue reading Software Defined Networking (SDN) – A primer

VNF Manager (VNFM)

A VNF manager manages the state, lifecycle and resources of one or more VNFs. It is responsible for instantiation, update, query, scaling,healing, termination etc of the VNFs. (Read about NFV Architecture here) VNF Descriptor ( VNFD) The deployment and operational behaviour of each VNF is stored in a VNF Descriptor file ( VNFD). It contains … Continue reading VNF Manager (VNFM)

NFV Orchestrator ( NFVO)

  The NFV Orchestrator or NFVO has two primary responsibilities, resource and network service orchestration. (Read about NFV Architecture here) 1. Resource Orchestration:   Resource Orchestration refers to the management of virtualised and non-virtualised resources in the Network Functions Virtualisation Infrastructure (NFVI). It will basically oversee the allocation of resources and monitor the allocated resources … Continue reading NFV Orchestrator ( NFVO)

NFV Architecture

  NFVI - Network Functions Virtualisation Infrastructure NFVI Consists of all resources required to gain virtualisation. NFVI can span across many locations, e.g. a part of the infrastructure could be in city A and another at city B to enable geo-redundancy. A location where NFVI node is deployed is called NFVI-PoP ( NFVI Point of … Continue reading NFV Architecture