A high-performance wireless LAN chip, a multifunction personal sensor device and a new method of securing voice over IP (VoIP) were all on display Wednesday at Intel as researchers from around the company played show-and-tell with media and analysts.The still-visionary projects were among the networking ideas on display at the company\u2019s annual Research at Intel day at its Santa Clara, Calif., headquarters. The event included demonstrations from a wide range of areas. Researchers made few predictions about when their work would see the light of day in products, but the projects suggest the dizzying array of technologies that the chip monolith is pursuing. Naturally, many involved applications that would make use of the kinds of processors Intel makes.An Intel team has integrated almost every component of a multi-antenna wireless LAN system into a chip less than 10\u00a0millimeters (0.4 inches) across that was built using complementary metal-oxide semiconductor (CMOS) technology. CMOS is used to build fast, energy-efficient processors, including Intel\u2019s PC microprocessors, in high volumes.Multiple transmitting and receiving radios with their own antennas are the key characteristic of a new generation of wireless LAN gear that is now being standardized in the emerging IEEE 802.11n standard. With more than one antenna, a wireless client or base station can send data faster, farther and more reliably in most cases. By putting many functions of traditional analog radio components into the experimental chip, Intel played to its own strengths in high-volume silicon. A wearable sensor device demonstrated at the event could monitor a person\u2019s speech and movements as well as conditions such as light and humidity, in real-time. The box, which is smaller than a deck of cards and communicates via Bluetooth, has seven sensors packed into it and can detect whether the wearer is standing or walking, and quiet or talking, according to Tanzeem Choudhury of Intel\u2019s research staff. Such a device could be used to monitor the health of an elderly person living alone or track whether someone is getting enough exercise, Choudhury said. Another piece of the system is artificial-intelligence software that can infer the user\u2019s activities and situation from the combined data collected by the sensors. The system isn\u2019t intended for involuntary monitoring; the user can turn sensors on and off and decide what information is sent out and to whom, she said.Another team at the company is applying virtualization to VoIP security.\u00a0It has isolated VoIP on a PC from viruses and other threats by logically dividing the system into separate domains, each with its own virtual machine, said Michael Covington, a senior research scientist in Intel\u2019s Corporate Technology Group. For example, a PC could include one domain for commodity software, such as productivity applications, and one for critical components such as the VoIP communications stack. A virus that came from a downloaded application couldn\u2019t infect the critical components, even though VoIP could be integrated with productivity applications through a separate collaboration domain that had a special link to the critical VoIP area. Using separate domains also improves the performance of VoIP calls, because it allows the needed processing power to be set aside for VoIP, Covington said.-Stephen Lawson, IDG News Service (San Francisco Bureau)Check out our CIO News Alerts and Tech Informer pages for more updated news coverage.