A few days ago, it was reported that Intel is working with the startup Ozmo to push the WiFi solution to replace Bluetooth as the wireless personal area network (PAN) industry standard. The goal of WiFi is not only Bluetooth, but ZigBee is also facing the mainstream position in the wireless sensor network (WSN) field. In the precarious situation, with the help of low-power WiFi solutions, the startup GainSpan said that they already have the heavyweight weapons to win in this battle of positions, and Intel once again became the promoter behind the scenes.
Road to innovation
"GainSpan provides WiFi solutions for low power consumption and low duty cycle applications. Our product GS1010 for WiFi wireless sensor networks can ensure up to 5 to 10 years of use under one AA battery power supply (the specific number depends on the number). Sampling frequency in different applications).†Vijay Parmar, President and CEO of Gainspan, said to "International E-Business." Before leading the team to establish GainSpan in 2006, Parmar worked for Intel Corporation for four years.
The seeds of GainSpan's innovation came from a project of Intel's internal incubator "New Business Planning Group". "When I was working at Intel, my development team was assigned to conduct WSN market research," Parmar said. "At that time, the first thing we thought of was ZigBee, which claims to be able to meet the requirements of ultra-low power consumption, but in the end we turned to WiFi. For WiFi, the most important thing to meet the requirements of no WSN is power consumption, because people’s impression This is a very power-hungry wireless technology. Fortunately, at the end of 2005, we had already completed about 80% of the work before receiving financial support from Intel."
Although many projects under the new business planning team will eventually be incorporated into Intel's main product line, Intel finally decided to split Parmar's team from the company because it is not very relevant to the main business. So in September 2006, with the support of Intel Ventures and three other investment companies with 1.5 million US dollars in start-up funds, GainSpan, which is dominated by Parmar team members, was announced in Silicon Valley.
Why WiFi?
According to Shanghai. Yige understands that the reason that prompted Parmar and his colleagues to switch from ZigBee to WiFi came from a survey of potential customers of the WSN solution. "The survey results show that customers need more mature technology, and need IP-based technology to seamlessly connect to the corporate network. In addition, they also said that an excellent WSN solution should also have sufficient security, and it is best to be able to use existing technologies. Some systems. We think that ZigBee can't meet these requirements yet, only 802.11 can be done," he said.
Parmar said that the main reasons for supporting this conclusion include: First, WiFi can use the professional verification capabilities of WPA and WPA2 to improve the data security of the WSN network; secondly, by adding a new positioning method, the warehouse can be implemented based on WiFi. Accurate positioning of goods and personnel in the hospital; third, through effective activation/standby state transition mode and system power management, low-power WiFi wireless sensor solutions can be realized; fourth, SNMP protocol can be used to manage nodes in the WSN network ; Fifth, IEEE has added QoS features including data priority, voice and video transmission in 802.11e, which can guarantee the quality of service in some WSN applications.
What needs to be emphasized is the advantages of WiFi in device interoperability. "An application that may appear in the military field may be able to illustrate this," Parmar cites. "In these cases, you need to install a motion sensor on a wireless camera. Once motion is detected, the camera will automatically turn on and start sending to the receiving end. Image. The sensor can use ZigBee, but due to bandwidth and data transfer rate, people must use a WiFi camera to do this job. However, it is not so simple to ensure the good operation of the two protocols, but if a WiFi sensor is used, It becomes very easy."
Maximize return on investment
However, the advantages of WiFi in the WSN field are not limited to this. Parmar pointed out that this technology can also bring many benefits in terms of cost. Supporting this view is the ubiquitous WiFi network.
Indeed, WiFi wireless networks are increasingly being widely used in hotels, homes, office buildings, hospitals, and various commercial facilities. Figures from IDC show that in 2006, more than half of American companies established WiFi networks, and ABI Research predicts that by 2010, more than 40% of American households will also install WiFi networks. In China, Beijing and Shanghai have put forward plans for wireless cities. In addition, the WiFi mobile phone market is also in full swing. "In the rapid development of wireless networks, the 802.11 standard has quickly become the mainstream direction of development." Parmar said.
He believes that using existing WiFi network resources to deploy and implement WSN will save a lot of hardware costs. In addition, there is no need to consider interoperability with ZigBee devices, which helps project implementers to shorten the development cycle. In addition, the industry has accumulated a wealth of network knowledge on WiFi, and these can be applied to WSN. In addition to the WiFi cameras and motion sensors already mentioned, various other WiFi devices that are constantly emerging on the market have also increased the ease of use of this technology. Of course, mature WiFi also has the advantages of existing architecture support and quick installation. "In short, using WiFi for sensor networks will help maximize return on investment (ROI) and total cost of ownership (TCO)," Parmar said.
Complete solution
In addition to GS1010, GainSpan currently also provides customers with software development kits and an intelligent network/client management software called GainSpan Management System (GMS). With the strong guarantee of 802.11i, AES encoding, and EAP-FAST, this SoC based on IEEE802.11b/g and using ARM7 core provides enterprise-level security and reliability, while RSSI (Relative Signal Strength Indicator) and TDOA The (arrival time difference) algorithm lays the foundation for the precise positioning function.
What is worth mentioning is the GMS control system provided by GainSpan. The real-time interface helps the system control and adopts a single-hop network management node to maximize the battery life of the client device. Supporting standard network protocols such as SNMP and UDP enables WiFiWSN to be compatible with existing network systems such as industrial control, building automation, and enterprise network management systems. The software can also effectively configure, control, and monitor sensor nodes, realize intelligent centralized control and management, and support firmware upgrades. In addition, the intelligent data processing capabilities can also centrally manage, preprocess and summarize the data collected by the sensors.
In order to further accelerate the progress of customer research and development, GainSpan also provides customers with a simple and compact reference design for evaluation, testing and verification. The development platform it provides can also support various sensors such as temperature, humidity, photosensitivity, pressure, and acceleration. And reserve the sensor interface and debugging and program burning interface selected by the customer.
Starting in the second quarter of 2007, GainSpan began to provide samples to customers worldwide. In October, the company officially released this WiFiWSN solution chip using TSMC’s 0.18-micron CMOS process. One month later, it successfully secured an additional US$20 million second round of investment by OpusCapital and the first round of four venture capital companies. , Used for mass production of GS1010.
"Dozens of customers are using our chips to develop products." Parmar revealed, "Aginova and RFDigital have launched products using our chips in May this year." GainSpan's goal is to achieve 400 to 1,500 chips this year. Shipments and will grow to 20 million pieces next year.
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