RTP (Real-Time Transport Protocol) in IMS Network
RTP refers to "Real-Time Transport Protocol". It is the protocol that is responsible for the encapsulation and transportation of real-time media data, such as audio and video, in the IMS network.
It provides features like sequence numbering, timestamping, and payload type identification to enable the receiver to properly reconstruct the real-time media stream.
RTP operates on top of the IP protocl in the network layer, which provides the necessary addressing and routing mechanisms for the real-time media data, to be transported across the IMS network.
And it works on the UDP protocol in the transport layer, which provides a lightweight communication, that is suitable for the delivery of time-sensitive multimedia data.
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VoLTE (Voice over LTE) Introduction
While the UE attached to LTE network, the UE can initiate, or receive a voice or a video call. The UE achieves this, by connecting to an external network, which is the 'IMS' network. We can call this, Voice over LTE (VoLTE). This is exactly like when you would like to create a call, while…
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What is an ‘EPS Bearer’ in LTE ?
During 'LTE attach' procedure, the network establishes this EPS Bearer between the UE and the PGW. The PGW assigns an IP address for this Bearer. The UE uses this IP address, in order to communicate with the PDN. In addition, the PGW assigns a QoS for this Bearer, which guarantees the QoS for the data…
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QoS ‘Quality of Service’ in GPRS
QoS refers to 'Quality of Service'. After 'PDP context activation' procedure completes, a 'PDP context' shall exist on the MS, the SGSN, and the GGSN. In addition, the GGSN assigns a QoS for this 'PDP context'. This QoS describes the priority that the nodes shall give to traffic belonging to this 'PDP context'. The subscription…
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