While the competition of various wired and wireless home network architectures and standards continues to intensify, there is a wireless application technology that emerged at this year's International Consumer Electronics Show (CES)-Miracast; this technology allows users to use smart phones The content on handheld devices such as tablets and tablet computers is wirelessly transmitted to the large screen of the TV, which attracts many visitors to stop at the exhibition.
Miracast shows a way to project personal multimedia files (or network content that is readily available through mobile devices) onto a large-screen TV, completely bypassing the artificial restrictions established by broadcasters or other service providers- These companies usually prefer to surround the high walls with content provided via the Internet.
Brian O'Rourke, a senior analyst at the market research institute IHS, said that Miracast is actually Wi-Fi Display, a software layer that allows Wi-Fi chips to have peer-to-peer connection capabilities; -Fi one-to-many architecture is different, the Wi-Fi Alliance is still responsible for the establishment and maintenance of its standards. Miracast's feature is the ability to map the content played on any small screen to a larger screen.
In addition to Miracast, UltraGig, another wireless technology, is also trying to differentiate itself from it. UltraGig is a patented 60GHz technology being promoted by chip manufacturer Silicon Image. The company's 60GHz wireless technology is from SiBeam acquired in 2011; later Silicon Image gave the new name of WirelessHD technology developed by SiBeam. Is UltraGig.
Let's review: WirelessHD is the highest bandwidth wireless video transmission solution, which is currently commercially available in mass production. O'Rourke said that the technology is optimized for uncompressed 1080p video transmission, so there should be no human problems caused by packet loss or compression formats such as MPEG.
Both Miracast and UltraGig demonstrated similar peer-to-peer wireless connection capabilities at the CES through the use of smartphones in the living room. Many chip manufacturers including MediaTek, Nvidia and Broadcom promote Miracast technology at CES. TIm Vehling, vice president of Silicon Image and general manager of the wireless department, is trying to highlight UltraGig in the 60GHz band at a CES forum. Technical advantages.
Vehling pointed out that UltraGig will not be interfered with during the actual display, but Miracast will be affected by many Wi-Fi devices: the only way for people to show Miracast at CES is to leave the venue (for example, MediaTek is a private display in a hotel Time); some cases use some "fake" methods (such as using MHL cables).
Another market research organization ABI Research wireless link and semiconductor market analyst Peter Cooney agrees with the above views. He said that some Miracast demonstrations at the CES venue may use 802.11n technology, so that is not a fair contest. In any case, the CES venue is a very noisy environment.
Wi-Fi is undoubtedly still an important wireless broadband technology in the home; according to ABI Research statistics, in 2012 alone, global shipments of Wi-Fi devices exceeded 1.5 billion units. However, such figures also give rise to reasonable concerns about whether Wi-Fi devices will be overcrowded in the future, and their durability; this is the negative situation for Silicon Image to bet on its UltraGig technology.
In addition to the lack of device congestion, Vehling also emphasized the advantages of UltraGig's low latency and high video quality. "Wireless HD at 60GHz has a latency of less than 5ms." It is particularly important for gaming applications, plus its increased bandwidth is at 60GHz. The frequency band is provided, and the video quality is better; H.264 compression is not necessary.
So, what is the bottom line of the competition between the two technologies? Of course it is a classic dispute about patented technology and standard specifications. Needless to say, UltraGig's shortcomings are: it is a patented chip solution, and Silicon Image is the only source of supply; I's analyst O'Rourke said: because of its relatively high price, it is for consumer electronics industry A big risk.
According to O'Rourke, Silicon Image has been selling UltraGig to OEMs for some time, but so far there have been few success stories; he said that Silicon Image is in a dilemma-the company needs impulse to drive down average chip sales Price (ASP), but OEM customers hope to obtain lower prices before a large number of applications. If there is another source of UltraGig chip supply, it will help some and reduce the supply risk to OEM manufacturers.
However, the war between UltraGig and Miracast may also have unexpected new twists.
The impact of the merger of WiGig and Wi-Fi
In the short term, UltraGig and Miracast are a competition between 60GHz patented technology and the 2.4GHz / 5GHz Wi-Fi standard, but earlier, the WiGig Alliance (an organization that promotes open standards for 60GHz technology) and the Wi-Fi Alliance announced a merger. The development that emerged was "WiGig will be merged into Wi-Fi, so 802.11ad will become the mainstream 60GHz standard," ABI's Cooney predicted.
WiGig or 802.11ad is ultra-wideband (UWB) technology using 800 or 1600MHz in the 60GHz frequency band, and the transmission rate is claimed to be up to 7Gbps; the merger of two originally competing organizations, WiGig Alliance and Wi-Fi Alliance, will obviously allow 60GHz technology The line of competition with the 2.4GHz / 5GHz Wi-Fi standard is blurred.
Cooney said that WiGig is a standard that is open to all WiGig Alliance members, and Silicon Image is also one of the members of the alliance, so the company can also obtain WiGig technical content. Of course, UltraGig can already be mass-produced. Silicon Image ’s goal is to promote the growth of 60GHz technology, which will not change the fact that UltraGig is still a patented technology today; but after two to three years, the situation may be completely different.
In the future, UltraGig may have the support of the Wi-Fi Alliance and its members, so another 60GHz technology will be difficult (or impossible) to compete with, Cooney believes.
Will his prediction be too optimistic? Maybe, maybe not. According to ABI Research's prediction, 802.11ad (WiGig) will be mainly built on a tri-band chipset (that is, a solution that supports three standards of 802.11n, 802.11ac, and 802.11ad at the same time), and then future mobile devices will be available for different use. Situation, the ability to seamlessly choose any communication protocol.
In addition to Silicon Image, there are other manufacturers specializing in 60GHz technology. Cooney pointed out that Wilocity ran the fastest, and the company demonstrated the 60GHz / WiGig / 11ad solution in the private showroom at CES. The Wi-Gig technology provider has partnered with Qualcomm and Marvell to launch a tri-band solution. At the same time, Dell was the first to publish an ultrabook with the WiGig / 80211a solution built in collaboration between Wilocity and Qualcomm Atheros.
How WiGig will affect the future development of Silicon Image ’s UltraGig is unknown; furthermore, it remains to be seen whether Silicon Image will turn its patented technology into a part of the WiGig solution. At least now ABI believes that UltraGig will not always be completely isolated from WiGig or WiFi's patented 60GHz wireless technology.
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