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Use of wireless technology is rapidly increasing due to its easy installation and broad coverage. It does however have the draw back of lower bandwidth and throughput compared to a wired network.
A Wireless Access Points can only broadcast the same data to all computers at once, like a hub, so performance dramatically decreased when more clients connect. This differs from a switched based network which can simultaneously send and receive different data to more than one connected client.
ClickView Wireless
ClickView has developed a new Wireless solution to over come the limitation of a wireless network.
ClickView Wireless re-encodes the ClickView Library into a lower bitrate wmv file. This decreases the file size and allows more concurrent users to view ClickView videos while still offering a great viewing experience.
The Bit-rate of ClickView Wireless Videos
ClickView Wireless videos are encoded at 300 Kbps. This is less than a third the size of ClickView Videos played through the player.
Internal testing has shown that 30 wireless computers can concurrently stream ClickView Videos from the local ClickView Server. This allows a class of wireless laptops to all watch videos.
ClickView recommends at least one wireless access point per classroom (30 students). See Determining Number of Simultaneous Users below for details.
ClickView Wireless Diagnostic tool:
ClickView Wireless FAQ:
ClickView Player
The ClickView Player can be used to deliver high quality video over a wireless network although the total number of users will be fewer than ClickView Wireless.
ClickView users watching videos from computers connected to the wired network will not affect the operation of your wireless network connection as only wireless ClickView Player users will consume the wireless network bandwidth.
The Bit-rate of a ClickView Video
ClickView videos are generally encoded at 1.1 Mbps. (1.1 million bits per second)
The means that each ClickView user will consume an average of 1.1 Mbps of your total wireless connection bandwidth.
For this reason, a wireless network running on the 802.11g specification standard is strongly recommended.
Important!
When creating a ClickView Lesson from a wireless laptop running ClickView Player, we strongly advise that you do not create a new Lesson Server (a sub-server) as this will essentially double ClickView�s consumption of the available wireless bandwidth as both the uplink and downlink would then be utilised during the video delivery process.
Wireless Access Point bandwidth
Modern wireless networks range in transmission bit-rate from 5.5 Mbps to 108 Mbps. The latest draft wireless protocol promises a maximum of 248 Mbps.
The transmission bit-rate speed will be determined by the standard used by your wireless devices. The most common specification currently is 802.11g but should be surpassed by 802.11n in the next two years.
Wireless Access Point protocols
| Protocol |
Typical Throughput (Mbps) |
Max Bitrate (Mbps) |
Range indoors |
ClickView Player |
| 802.11a |
23 |
54 |
35 |
7 |
| 802.11b |
0.43 |
11 |
38 |
1 |
| 802.11g |
19 |
54 |
38 |
7 |
| 802.11n |
74 |
248 |
70 |
22 |
Note: the above information is just a guidleine.
Determining Number of Simultaneous Users
In order to determine the theoretical maximum number of concurrent wireless ClickView users, you must compare the bit-rate of a ClickView video with the transmission throughput of your wireless network.
| Throughput | = Users |
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| Bitrate |
Note: The quality of the Wireless Access Point will also affect the throughput.
For more information on the wireless networks, please visit the following link:
http://www.microsoft.com/uk/education/tech-solutions/wireless/ |
