GPRS QoS - General Packet Radio Service (GPRS)

What is GPRS QoS?

Quality of Service (QoS) for mobile packet data applications required is in assorted forms. QoS is considered important as different QoS exist for assorted GPRS applications like web browsing, e-mail transfer and real time multimedia.

QoS profiles are defined by using the below parameters:
  • Service Precedence
  • Reliability
  • Delay and
  • Throughput
Parameters are explained in detail below-

Service Precedence

Giving preference to one service over other service is called as Service Precedence. There are three levels in preference-
  • high
  • normal
  • low
Low priority packets are discarded when there is a network problem when compared to normal or high priority packets.

Reliability

This parameter describes how reliable the application is i.e., transmission characteristics. With reliability, maximum values for the duplication, the mis-sequencing, the probability of loss and corruption of packets are guaranteed.

Delay

The time taken to end-to-end transfer between two communicating mobile stations or in between a mobile station and the GI interface is defined as Delay.
Delay is the sum of all delays within the network. For example, the time taken for the request and assigning of the radio resources and the transit delay in the GPRS backbone network. Delays that are outside the GPRS network are not considered.

Throughput

It is the maximum/peak bit rate and the mean bit rate.
QoS profiles are communicated in between the mobile user and the network for every session. It again depends on the QoS demand and the resources available.
Based on the QoS profile chosen, transmitted volume of data and type of service, the billing is generated.

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General Packet Radio Service (GPRS) Topics