IMS Quality of Service (QoS) and Billing Issues

Quality of Service (QoS) Issues

  • IMS requires the carrier to have greater control over their network resources:
    Offering multimedia services on fixed-line networks and mirroring the fixed-line experience through mobile networks requires several capabilities not yet present in either network.
  • Chief among these is the regulation of QoS (Quality of Service) to maintain sufficient throughput within minimum delay limits appropriate to each session.
  • In the context of packet networks, Quality of Service (QoS) refers to the ability of the connection to meet certain specified service commitments. Different types of traffic and different services require different QoS levels due to their sensitivity to various transmission errors.

Billing Issues
IMS drives more services and allows for the pricing of services according to value rather than usage (minutes or bandwidth).  Value based billing is based on an event such as obtaining content. 

  • Real-time: Operators’ systems have heretofore gathered and processed data on a batch basis.  IMS forces operators to work in real-time or near-real-time.
  • Active: Operators will require active mediation for the on-demand services that IMS enables.  Passive mediation allowed through pre-subscribed services is no longer acceptable
    Configurable: Systems must be easily and rapidly configurable to support rules and procedures for many combined and on-demand services
  • Flexible rating and charging: With the advent of the VNO for IMS, operator mediation systems must be flexible enough to rate events for other parties that actually charge (bill) the end-user for the event
  • Converged: Operators have historically tied together disparate billing systems as a means of presenting a single bill.  IMS will finally force the issue as operators will be compelled to have truly integrated systems for more flexible billing, allowing bundling and packaging of various service and feature options.
  • Multiple technology support: Due to the on demand nature of IMS and the many types of applications and content that traverse the IP pipe, operator mediation systems must be able to collect and process usage and event records from multiple types of network elements and sources. 

This is part of the Mind Commerce series, IMS Deployment Issues: HSS Migration, QoS, OSS/BSS systems, and more 

For more about Mind Commerce IMS publications, see: 

For more about our IMS training, see:

About Mind Commerce

Analysis of telecom and ICT infrastructure, technologies, and applications.
This entry was posted in IP Multimedia Subsystem (IMS), Next Generation Networks (NGN), OSS, BSS, and Back-office systems. Bookmark the permalink.

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