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General information
Network bandwidth is a limiting factor in distributed system performance. The bulk of the information streamed over the network is video data. For example, the data flow (video stream) from remote cameras, such as used to monitor ATMs, is sent via communication channelsone of the key factors limiting the performance of a distributed video surveillance system. Insufficient bandwidth can lead to loss of video data, transmission delays, and software malfunction.
The majority of network traffic consists of video streams from IP cameras and IP servers. In remote locations (for example, ATMs and remote offices), the entire video stream is transmitted over communication channels, which places increased demands on their bandwidth.
Minimum requirements
For correct operation of Axxon One, the minimum data transmission rate over the communication channel must be at least 2 Mbps.
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The minimum bit rate through the communication channel (network bandwidth consumption / goodput) for Axxon One must be at least 2 Mbit/s.indicated value is a minimum and doesn't take into account the total load from all connected devices and client workstations. To calculate the actual required bandwidth, see Calculation of required bandwidth. |
Calculation of required bandwidth
To determine the required TCP/IP network bandwidth for transmitting video transmission signals from IP devices and some video capture cards, we recommend using Platform Calculator. When you to use Axxon Platform Calculator (check the Total bitrate from ip devices (Mbit/s) parameter)use it, consider the value:
- Total streams → Summary stream from IP cameras (Mbit/s)—the total network load created by video streams from all connected IP cameras and other sources.
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In addition to video streams, the network transfers service traffic (control commands, synchronization, data from detectors, and so on). We recommend allocating a bandwidth reserve of at least 10–15% of the calculated total video stream. |
Recommendations for network organization
- For network segments with high loads, we recommend using switches with Quality of Service (QoS) to prioritize video traffic.
- When organizing communication channels between remote sites, you must consider not only the nominal but also the actual (guaranteed) channel bandwidth.
- For wireless connections, you must account for possible packet loss and speed fluctuations and allow for additional reserve.
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