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Method for context-aware management of Software-Defined Radios implementing RF-Identification (RFID) Sensors and Active Tags

IP.com Disclosure Number: IPCOM000021504D
Publication Date: 2004-Jan-21
Document File: 5 page(s) / 169K

Publishing Venue

The IP.com Prior Art Database

Abstract

Disclosed is a method for context-aware management of software-defined radios (SDRs) that implement radio frequency identifier (RFID) technology; that is, SDR-implemented RFID sensors (readers) and active tags. Benefits include improved functionality, an improved user experience, improved performance, improved power performance, and improved design flexibility.

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Method for context-aware management of Software-Defined Radios implementing RF-Identification (RFID) Sensors and Active Tags

Disclosed is a method for context-aware management of software-defined radios (SDRs) that implement radio frequency identifier (RFID) technology; that is, SDR-implemented RFID sensors (readers) and active tags. Benefits include improved functionality, an improved user experience, improved performance, improved power performance, and improved design flexibility.

Background

         With the implementation of SDR systems, continuous radio operation is expected to become common place. Mobile computing devices will maintain constant connectivity, even when device lids are shut, like cell phones operate today. Operating the radio requires power. Regulating the power level effectively can extend the useable time between charges.

General description

         The disclosed method uses context information and policy/action to manage RFID sensing/reporting and SDR (reconfigurable radio) configuration/function. The key elements of the method include:

•         Microprocessor-based system

•         Software-defined radio

•         RFID radio configuration

•         Context information (such as location and movement data)

•         Associated policies and actions

Advantages

         The disclosed method provides advantages, including:

•         Improved functionality due to expanding communication by enabling new interaction modes and sensing the surrounding world using the SDR as an RFID sensor to read RFID tags labeling objects or surveyed locations

•         Improved functionality due to providing soft RFID tags stored in nonvolatile memory on the platform, where the SDR is configured as an “active” RFID tag.

•         Improved user experience due to automatically instantiated SDR RFID configuration/operation/actions

•         Improved performance due to handling multiple RFID frequencies because the radio is reconfigurable

•         Improved power performance due to activating RFID sensing/tag operations only when required

•         Improved design flexibility due to accommodating expanded RFID standards and frequencies hrough software upgrades

Detailed description

         The disclosed method includes an SDR component in a microprocessor-based system configured for wireless network communication. The SDR can be configured so that it can sense passive or active RFID tags within the vicinity of the system (see Figure 1). The SDR can also be configured to function as an active RFID tag, effectively increasing the sensing range of any receivers/sensors (see Figure 2).

         The disclosed method uses policies that are often based on current context to determine when RFID configurations are to be instantiated and operations conducted (see Figure 3). Context can include, but is not limited to the following:

•         History information

•         System state

•         Location, such as GPS-triangulated location from beacons and calendar entries

•         Device in-motion sensors

•         Power changes, such as wall outlet to battery

•         Network connectivity chang...