摘要:
A system includes a tag associated with an item wirelessly transmitting data; a network device receiving the data and determining a location of the item; and a mobile unit receiving the location of the item from the network device. The mobile unit further receives the data from the tag and outputs a description of the item based on the data.
摘要:
Methods and systems for controlling mobile unit access to network services based on the location of the mobile unit are disclosed. One system includes determining if the mobile unit is located within an area and enabling access to the network services, by the mobile unit, in response to determining that the mobile unit is located within the area. A system includes a reader configured to determine if a mobile unit is located within the area and a switch coupled to the reader. The switch is configured to provide access to the network services, to the mobile unit, in response to the reader determining that the mobile unit is located within the area. An apparatus includes means for determining if a mobile unit is located within the area and means for enabling the mobile unit to access the network services in response thereto.
摘要:
Methods and systems are provided for determining the location of a first wireless device (e.g., a mobile unit) within a wireless network comprising a plurality of second wireless devices (e.g., access points). The method includes identifying an overlap area corresponding to the intersection of RF ranges for the one or more second wireless devices then computing a set of signal strength values, each associated with a measure of RF signal strength (e.g., RSSI) received by the plurality of second wireless devices from the first wireless device. A decision metric is evaluated for a plurality of locations within the overlap area based on the set of signal strength values. The location of the first wireless device is determined by selecting, from the plurality of locations, a location having the optimum value of the decision metric within the overlap area. The decision metric may utilize a minimum mean square error (MMSE) calculation. A weighting function may be used to remove redundant or weak signal strength values. The systems and methods are applicable, for example, to networks operating in accordance with 802.11, RFID, WiMax, WAN, Bluetooth, Zigbee, UWB, and the like.
摘要:
Methods and systems are provided for determining the location of a first wireless device (e.g., a mobile unit) within a wireless network comprising a second wireless device (e.g., an access point). The method includes determining a signal strength contour associated with RF communication between the access point and the mobile unit, and adding a correction factor to the signal strength contour to produce a corrected signal strength contour, wherein the correction factor includes the sums of the differences between the transmit power and the antenna gain associated with the mobile unit and the access point. In an alternate scheme involving stored fingerprint data, a correction factor is introduced based on the differences between antenna gains and transmit power associated with the mobile unit under consideration and the mobile unit used for generating the fingerprint data. The systems and methods disclosed herein are applicable, for example, to networks operating in accordance with 802.11, RFID, WiMax, WAN, Bluetooth, Zigbee, UWB, and the like.
摘要:
A system for assessing the state of an RF network includes a plurality of wireless devices coupled to the network and having one or more associated antennae, the wireless devices configured to process data received from a plurality of RF elements within range of the antennae. An RF switch is coupled to the network and configured to receive the data and transmit the data over the network. A first memory within the RF switch is configured to store a system state comprising a plurality of performance indicators, wherein each of the performance indicators is associated with an operational characteristic of one or more of the plurality of wireless devices. A second memory within the RF switch is configured to store a plurality of labeled data entries, the labeled data entries each including the system state and a user-entered identifier, wherein the user-entered identifier includes information related to the time at which the system state was selected. A display coupled to the network is configured to display a comparison of the system states.
摘要:
A handheld device (e.g., an RFID reader, mobile computer, or the like) is configured to periodically scan its environment for the presence of RFID tags, determine whether any of the RFID tags within range include a valid security code, then disable operation (e.g., by preventing access to stored data) when it is determined that there are no RFID tags with a valid security code within the operational range. The RFID tags may be placed strategically at secure locations within the environment, such as within other network devices (access ports, switches, etc.).
摘要:
A method for automated testing of a device (e.g., a router, switch, mobile terminal, barcode reader, or the like) includes creating a metafile, establishing a network connection to the device, parsing the metafile to determine a device command and an expected result, apply a terminology substitution process to the device command based on a terminology block associated with the device, thereby creating a modified device command; issuing the modified device command to the command line interface of the device via the network connection; receiving a response from the command line interface of the device via the network connection; comparing the response to the expected result, then logging, to a test summary file, a test result based on the comparing step. The metafile language has a relatively simple vocabulary and syntax, and is thus easy to learn and implement.
摘要:
A graphical management system includes a web browser application communicatively coupled to a web service and a graphical management module over a network and a plurality of wireless devices (e.g., RFID readers, access ports, etc.) coupled to the network and having one or more associated antennae. The wireless devices are configured to process data received from a plurality of RF elements (mobile units, 802.11 devices, RF tags, etc.) within range of the antennae. An RF switch coupled to the network is configured to receive the data and transmit the data to the graphical management module, which provides to the web service graphical information relating to the state of the RF elements (e.g., location information, heat maps, intrusion detection, self-healing status, etc.)
摘要:
Wireless switches in a cluster are managed by providing a configuration server for storing common configuration files and a DHCP server for storing cluster-specific configuration files corresponding to each cluster. A method for configuring the wireless switches then includes requesting, from the DHCP server, an IP address for the wireless switch; receiving, from the DHCP server, the IP address and the cluster-specific configuration file; receiving, from the configuration server, the common configuration file; and executing, at the wireless switch, the cluster-specific configuration file and the common configuration file.
摘要:
A wireless data communication system includes an access port configured to wirelessly communicate with a plurality of mobile units within multiple basic service sets (BSS), and a wireless switch having multiple predefined wireless local area networks (WLANs). The wireless switch is configured to automatically map the WLANs to the basic service sets and transmit to the access port a configuration template depending upon the type of access port. In one embodiment, there are n basic service sets, each having a corresponding basic service set identifier (BSSID), and m WLANs, each having a corresponding WLAN index, wherein the m WLAN indices are uniformly mapped to the n BSSIDs such that each BSSID has substantially the same number of WLAN indices mapped thereto. In a particular embodiment, there are n=4 BSSIDs per access port and m=16 pre-mapped WLANs. In this way, the wireless switch and respective access ports can be set-up in a simplified manner, in much the same way that set-up is performed with traditional access points.