High Quality video conferencing is dependent on robust network conditions that can survive the big demands of a high definition video call. There are generally two types of network setups, one is of course converged network which does not have any dedicated or separate connectivity for video infrastructure and other one which has dedicated connectivity options.
Let us discuss about the first one which is converged networks, in such architectures, both data and video/voice traffic runs on the same links. In such scenarios, bandwidth allocation is done based on peak demand for carrying video and utilization of links bandwidth including both the data and video/voice traffic. Since data traffic is burst in nature, it becomes challenging to rightly size the links.
In such scenario, proper sizing must be performed before going ahead with the deployments. Other option is to have dedicated network connectivity only for Video/Voice traffic. As video conferencing is bustier than voice, links should size to the limit of 75% so that additional traffic can be easily handled during sudden peak times.
HD Video Conferencing requires real-time traffic support at high data rates for a successful implementation. It is critical that the specifications for the wide area network connection meet the requirements of the expected HD video conferencing demand both for real-time support (low loss, low latency, low jitter) as well as for the bandwidth required. Many service providers today provide variety of QOS techniques to address the demands of video conferencing.
- MPLS : MPLS allows the service provider to configure the appropriate bandwidth and to offer classes of service to support the needs of high bandwidth real-time flows
- Layer 2 Connectivity like Metro Ethernet: Layer-2 connectivity can successfully support HD video conferencing if the bandwidth and QoS parameters are properly specified.
- RSVP & Diffserv Environments: RSVP allows reservation of network resources for an end to end path while Diffserv prioritizes traffic over others and reduces packet loss.
- Various techniques should be used in case network bandwidth conditions are not ideal for a deployment for e.g.
- Reducing Video Resolution from Full HD to some lower
- Limiting the concurrent video calls/conferences buy creating scheduling policies
- Upgrading the Bandwidth is another solution in case video conferencing is crucial to the enterprise
- Using Video solutions from a vendor which supports Scalable Video Codec technology on its product lines. By dynamically managing the video quality in worst bandwidth conditions in real time, a better solution can be achieved. Please visit the product selector section in case interested to find vendor information supporting SVC codec.
Following network conditions can be used depending on the environment with SVC codec: