Question

Why QoS in mobile networks should be considered on an end to end basis? and how does jitter affect QoS in mobile networks?

Answer 1

Some important terms

1. Computer Network is a set of computers or nodes connected together for the purpose of sharing resources or to communicate with each other. eg Computes connected via Internet or computers connected with shared printed.
2. Network Traffic or Data Traffic is the amount of data moving across a network at a given point of time. eg sending emails or messages to someone
3. Packet loss when one or more packets of data travelling across a computer network fail to reach their destination, then the term given is packet loss
4. Latency is the time taken for a request to travel from the sender to the receiver and for the receiver to process that request
5. Jitter

• Packets transmitted continuously on the network will have differing delays, even if they choose the same path.
• example in packet switching where packets are routed individually and devices receive packets in a queue, so constant delay pacing cannot be guaranteed
• This delay inconsistency between each packet is known as jitter.

Mobile Network can be defined as a communications network that is spread out over an immense land area around the world, connected wirelessly by transceivers at fixed locations that are known as cell sites or base stations

Mobile Network and Wireless Network are two different types of network

Nerwork Congestion occurs when a network node or link is carrying more data than it can handle

Qos in mobile network

• Quality of service (QoS) refers to any technology that manages data traffic to reduce packet loss, latency and jitter on the network.
• QoS controls and manages network resources by setting priorities for specific types of data on the network.
• End-to-end QoS involves classifying and marking packets at the source and having QoS policies of how the various classifications/markings are treated from the packet source to the packet destination
• Quality of Service is managing network resources to reduce packet loss as well as lower network jitter and latency.
• QoS technology will manage resources by assigning the various types of network data with different priority levels.
• Dynamic QoS resolves traffic congestion when the Internet bandwidth is limited. If your Internet download and upload speed is 250 Mbps or less and you like gaming and streaming video, then you can benefit from enabling Dynamic QoS
• With the QoS setting enabled in the mobile, we can prevent unwanted noises which increases the quality of the connections

So that is why QoS in mobile networks should be considered on an end to end basis.

Jitter affect QoS in mobile networks

• QoS measurements (e.g.delay, packet loss and jitter)
• As we dicussed above that jitter is just delay in packets whenpackets are queued example in packet switching.
• So when packets are dropped or delayed in real-time communication, such as a voice or video calls, these sessions can experience jitter and gaps in speech.
• Jitter is the result of network congestion and route changes. Too much jitter can degrade the quality of voice and video communication and thus affecting the quality of our communication