Best Bandwidth Platform For Video Conferencing
These types of questions that must be asked when you are in the process of developing a solution video conference. Answersthen drive selection of the codec is a hardware option is the software that produce best fits the needs.
If the desired end product before you select it makes it easier to integrate into new or existing IT / network infrastructure.
Instead of focusing on the underlying physical topology is used, the objective should be to find a network provider that can deliver the functionality required to support the application. This is really a big difference, that the physical or link layer. The provider will likely manage the CPE anyway, and give you the Ethernet channel for your network. What you are worried about network level and, more specifically, QoS (Quality of Service).
To support streaming media such as voice and video, then there should be a mechanism for QoS at the network level, which will guarantee low latency and jitter. Converged network products offered by carriers today that are commonly used MPLS (Multi Protocol Label Switching) technology. This allows the customer to determine which packets to receive certain benefits when they are sent to the network path.
As an example, consider a network that will carry voice and video, VPN, Internet access. Perhaps the application that works through the VPN if the principal business. In this case, the data will be classified at the network edge to provide the greatest functionality. Voice and video packets will be catagorized as delay and jitter sensitive, VPN packets will be catagorized as falling sensitive, and Internet traffic, as the most effort. These attributes will be implemented within the network operator. The end result of this is that your VoIP phones and video will be performed without the noise and other problems, and an Internet connection will simply slow down a bit when you take the phone off the hook or put the demand for VPN.
Legacy networks have a hard time implementing QoS functionality in connection with the restrictions of senior design and hardware (eg older broadband cable networks). Almost all the networks being built today can not provide QoS, but some projects work better than others. Always get references of other users using the same application, to be sure will be successful.
When designing the bandwidth requirements for the design, remember the human factor. If bandwidth is available, people will use it. The general trend I’ve seen that use is doubling every year. Of course, adding additional network applications can make it grow even faster.
Total …. everything goes back to your requirements and install a backup deployment, such as:
* How many concurrent users
* Bandwidth
* Type of service, which will be deployed
* Technology connections for each peer participating.
* Required traffic (with room for reasonable growth) to fill this gap.
If you’re only looking at a couple of talking heads little data side, you can get away with a few hundred kbit / s per connection. However, if you’re looking for medical consultations during the surgical procedure, hi-definition, and then 20-30 Mbit / s or more in the context may require.
Now, what else is happening in your network? If this is a converged network (and it will ultimately be the way), then this video to compete with the voice, the other video, data, and who knows what else. What methods are available for managing data in network? Even Gigabit Ethernet can get swamped if there are a lot of HD video streams in the network.
And finally, what level of quality now require users of the system? Although you can make “video”, the conference 128kbps, videos are pretty poor, and any loss of packets or errors in the data on all cause serious problems. If you want to telepresence (the feeling that there is), then you need a 1-way delay less than 250 MS, which limits the compression (group training) choice and increases the bandwidth requirements.
The fact that there will be a great compromise between the capacity, quality and bandwidth requirements. Once these trade-offs have been decided, you will need to decide if the existing network infrastructure can support a compromise solution, or if you want to run separate networks to support video. Given that the individual networks is very expensive, you should determine which technologies should be on a converged network to support video applications.
