The network communication industry in 2012 seems to be unsurpassed, but in fact it is surging, then a lot of things have happened in the network communication industry in 2012, and it is basically driven by technology, what new technologies are there in 2012, and in 2013 What new technological trends will there be, through the complex and complicated, and listen to me one by one.
Year-end review of 2012 network technology inventory
The booming mobile Internet has spawned 802.11ac preterm birth
According to 740 million WLAN chip shipments in 2011 and 1.1 billion smart business terminal devices this year, we see that smartphones and tablets now have WiFi as a standard feature, but 2G and 3G have become optional features. It seems that WiFi has been accepted by the public.
What trends will WLANs have in 2013? Relevant data shows that in 2013, the number of people going out of office will reach 1.2 billion, while mobile office workers will account for 35%. They have also developed rapidly in the enterprise network. More and more employees use their own smart terminal equipment to work, and efficiency Greatly improved, which triggered BYOD trend.
This year is the fastest year for the development of the 802.11ac wireless protocol. Although the agreement has not yet been finalized, there are several manufacturers that have released products for the Gigabit wireless routers supporting 802.11ac in the home. The integration of enterprise networks into wired and wireless integration is accelerating. Network manufacturers are actively working on how to meet the service quality requirements of high-bandwidth business such as high-definition video streaming and multimedia, so that enterprise users can enjoy high-quality wireless services.
Huawei first released a wireless AP that supports 802.11ac in July this year. Network manufacturers have paid close attention to the progress of 802.11ac for a while. On November 29th, Ruijie Networks released its X-sense "smart". Antenna's 802.11ac Gigabit wireless AP product-RG-AP530. On December 6, Huawei announced the industry's first enterprise-grade 802.11ac AP product in Beijing. The product includes two AP and AC products. Aruba also released It supports 802.11ac wireless controller (AC) products.
Although network manufacturers have actively released their wireless routers and wireless APs that support 802.11ac, the resistance to their development is that most terminals do not support 802.11ac. Currently, the only products that support 802.11ac are ASUS notebooks. The wireless network card that supports 802.11ac, only the newly released UnionPay, but the time to market has not yet been determined. I believe that with the determination of the 802.11ac wireless protocol and the continuous efforts of chip manufacturers, a variety of new products supporting 802.11ac have been developed, so as to make it more active.
BYOD meets at every meeting and talks about hot topics for the whole year
This year ’s industry ’s hottest topic is none other than BYOD. For BYOD brings new opportunities and challenges, each manufacturer provides its own solution, but as BYOD diversity changes, companies and network vendors have their views on this. It is also different.
BYOO represents a phenomenon that is personalized, mobile, and intelligent. People's lives and work are connected by a variety of intelligent terminals. The office is not limited to the traditional pC machine in the office. The own device has become a A trend that blurs the boundaries between office and life, giving the office a better experience.
BYOO is not a one-off phenomenon. It is a new office model that emerges with the development of advanced communications and IT technology. Corporate office has experienced from "fixed" scenarios to "mobile", from location restrictions to everywhere. Three development stages (this article mainly explores the development of mobile office): offline mobile office, online mobile office, and intelligent mobile office (BYOD).
For this hottest and hottest technology, it has attracted the attention of many manufacturers and enterprises, but enterprises are most concerned about data security issues, device loss, device management and other issues. I believe that as companies continue to understand BYOD, they will definitely More and more companies will deploy BYOD solutions. At the same time, as BYOD technology matures, BYOD solution providers will also provide a variety of solutions to meet different customer needs.
New technology, only SDN success or failure hero
OpenFlow originated from the Clean Slate project team of Stanford University. They separated the two functional modules of data forwarding (data plane) and routing control (control plane) of traditional network equipment, and standardized interfaces through a centralized controller (Controller) Management and configuration of various network devices, then this will provide more possibilities for the design, management and use of network resources, thereby making it easier to promote network innovation and development. So, they proposed the concept of OpenFlow, based on the programmable features that OpenFlow brings to the network, Nick and his team further proposed the concept of SDN (Software Defined Network).
To give an inappropriate example, SDN technology is equivalent to stripping away the management setting system and router of each home router. In the past, each router had its own management system, but with SDN, a management system can be used on all brands of routers. If the current network system is a functional machine, and the system and hardware are bundled together at the factory, then SDN is the Android system, which can be installed and upgraded on many smart phones, and at the same time install more and more powerful mobile apps (SDN Application layer deployment).
Although OpenFlow and SDN are not specifically created for network virtualization, the standardization and flexibility they bring bring unlimited possibilities to the development of network virtualization. We believe that OpenFlow / SDN does bring many opportunities for network transformation and innovation. From a horizontal perspective, SDN is a double-edged sword for traditional network vendors. With this sword, you can occupy more markets in the market. If you do n’t use it well, it will become a hot topic on the Internet. In the same way as for the demise of network vendors, of course, for traditional network vendors, if you don't "reform" your own lives, there will naturally be others working on your behalf. Who will be the leader in the SDN era, maybe time is the best prover. Dinosaurs with well-developed limbs are about to go extinct, and creatures with developed minds rule the earth. This is evolution.
10 Gigabit exchange bumps forward development depends on the future
2010 was the most milestone year in the field of Ethernet technology. On June 17, IEEE officially approved the IEEE 802.3ba standard, which marked the official departure of the commercial road for 40G / 100G Ethernet. It took two and a half years from the formal establishment of the working group in early 2008 to the formal approval and publication of the standard. It seems that everything is in the plan, but the road to the formulation of the 40G / 100G standard is far from superficial. smoothly.
Those who are familiar with the Ethernet standard will first discover the "alternative" Ethernet rate of 40G in the standard. 10M-》 100M-》 1000M (1G)-》 10 Gigabit (10G) (Figure 2), Ethernet has always defined a higher interface rate at a rate of 10 times, 40G-this is the first time for Ethernet Breaking this rule, so it is difficult!
The standards of 40G / 100G related fields were fully implemented in 2010, which opened a new field of Ethernet technology development. Since 2009, the industry's leading equipment manufacturers have launched and claimed to provide support for 40G / 100G ports and applications, but as a new technology, some key technological breakthroughs and breakthroughs will be involved in each link of its research and development and deployment. Innovation, which also brings a series of new challenges and problems to chip developers, equipment manufacturers and end users.
1. Router / switch processing capabilities, including total machine capacity, port density, high-speed look-up table, flow management, thermal design and energy-saving design
2. High-speed interface of dedicated message processing chip, including high-speed SerDes, high-speed large-capacity cache, etc.
3. (Super) long-distance transmission, how to use existing optical fiber and other infrastructure to achieve single-wavelength 40G / 100G ultra-long-distance transmission, including the use of more complex modulation methods, the use of EDFA, and the FEC algorithm with higher gain, etc.
Although 40G / 100G faces many difficulties, but with the continuous drive of demand, I believe that with the efforts of many manufacturers, we will be able to overcome these difficulties, solve all problems encountered, and achieve excellent results in the 10G field. The mega-era really came.
The Schottky Diode is another type of semiconductor diode which can be used in a variety of wave shaping, switching and rectification applications the same as any other junction diode. The main adavantage is that the forward voltage drop of a Schottky Diode is substantially less than the 0.7 volts of the conventional silicon pn-junction diode.
Schottky diodes have many useful applications from rectification, signal conditioning and switching, through to TTL and CMOS logic gates due mainly to their low power and fast switching speeds.
the Schottky Diode also known as a Schottky Barrier Diode is a solid-state semiconductor diode in which a metal electrode and an n-type semiconductor form the diodes ms-junction giving it two major advantages over traditional pn-junction diodes, a faster switching speed, and a low forward bias voltage.
The metal–to-semiconductor or ms-junction provides a much lower knee voltage of typically 0.3 to 0.4 volts compared against a value of 0.6 to 0.9 volts seen in a standard silicon base pn-junction diode for the same value of forward current.
Variations in the metal and semiconductor materials used for their construction means that silicon carbide (SiC) Schottky diodes are able to turn [ON" with with a forward voltage drop as little as 0.2 volts with the Schottky diode replacing the less used germanium diode in many applications requiring a low knee voltage.
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