What are the major requirements for streaming wireless video?
Answer: Streaming IP video traffic over WiFi is quite different compared to streaming IP data traffic. First, to allow for service providers to offer WiFi as the home backbone for entertainment service – whole home coverage is required without any dead spots. Whole home coverage is an elusive target which depends not only on range but also on number of walls in the way and the material they are made of. North American homes are typically larger than European and Asian homes, however interior American walls are typically made of wood or plaster while European or Asian are brick walls. By nature video traffic is extremely sensitive to delays and packet loss which translate immediately into video artifacts. Therefore, even if range and coverage are achieved, guaranteed throughput and signal robustness with almost no packets loss (typically measured at better than one packet loss per hour of video watching) are required for successful video streaming. Overall, for a true wireless HD video home networking, a unique combination of range, robustness and guaranteed throughput need to be met at all times and in the dynamic environment of the home.
Can’t I just use an off-the-shelf WiFi Access Points and adapters for video streaming?
Answer: While the common perception in the industry has always been that 802.11 a/b/g WiFi technology fails to meet the stringent requirements for wireless video home networking, the expectations were that the emerging 802.11n standard will bridge the gap. But unfortunately, it is rare for even the advanced 802.11n based access points to effectively stream even a single SD video stream from the dent to the living room without any artifacts. Most of the progress achieved by 802.11n has been made in the area of burst throughput increase. While it is possible to use off the shelf AP’s and Adapters to stream video in very short distances, unfortunately as the distance grows, the affects of decreasing sustained throughput and robustness shows and quality of experience degrades. For a true wireless HD video home networking a leap beyond traditional MIMO is required.
What type of devices does Celeno enable?
Does Celeno silicon need to be at both the Access Point side and the client side?
What is the difference between Celeno technology and other wireless technologies for video distribution (UWB, 60GHz, WHMDI, etc.)?
I am an IPTV subscriber. Will I notice any difference while watching video over my Celeno enabled WiFi streamer?
I am impressed, but what would be my cost?
Is Celeno a standards based solution?
Product and Technology FAQs
What is CL1800? What does it solve?
Answer: The CL1800 is a WiFi Baseband System on Chip that optimizes WiFi for reliable HD Video streaming for home networking applications. Reliable streaming of multiple HD streams throughout the house has been the “holy grail” of WIFI for many years. Standard 802.11 a/b/g or even 802.11n devices have proved inadequate due their inability to cover a typical home environment with multiple walls and multiple floors with consistent throughout and without packet loss which is crucial for perfect user experience. The CL1800 was designed to achieve exactly that. Powered by the innovative patent pending OptimizAIR™ technology CL1800 is able to reliably stream multiple HD streams throughout the entire house passing through multiple walls and multiple floors while maintaining consistent throughput and without losing packets, thus providing the perfect user experience.
What products can use the CL1800 SoC?
Answer: Any IP Video content point may use the CL1800 SoC to effectively stream it over WiFi around the home. These include, Residential Gateways, DVR/STB devices, Network Attached Storage devices and Media Servers. In addition, external video extenders may use the CL1800 SoC to effectively enable some of the above devices that might not be WiFi enabled yet – those external devices act as WiFi adaptors and connected as USB or Ethernet dongles.
What is OptimizAIR™? Is it silicon based technology or software based?
What frequency spectrum does CL1800 operate in?
Do you comply with power transmission regulatory limitations?
How do you avoid interference?
How do you ensure a secure wireless link? Service providers are concerned about piracy and consumers are concerned about privacy.
What is Celeno approach to QoS?
802.11e standard and the Wireless Multimedia Extensions (WMM) define a contention-based QoS scheme with basic classification system that uses statistical prioritization of high priority streams such as video streams over low priority streams such as data streams. This method does not ensure strict prioritization of video over data and therefore cannot guarantee consistent and timely delivery of video traffic. Moreover, it does not ensure fairness between the video streams. The definitions for automatic rules for the QoS categories classification are missing from the standard. It therefore relies heavily on user configurations, which contradicts IPTV operators' desire for a "plug and play" experience. Other proposed mechanisms such as HCCA provide more deterministic, controlled contention-free mechanism but relies on complex coordination function between the access point and the clients.
Celeno's OptimizAIR™ technology, implements an advanced QoS scheme which is contention-free, deterministic and guarantees data rate and jitter which was designed to be completely client agnostic (does not require client 802.11e or WMM collaboration) and to automatically assign the correct prioritization levels. Moreover, this unique design uses Channel Aware Scheduling to enforce guaranteed throughput and timely delivery of multiple HD video streams while maintaining fairness among them.