Android-based secure handheld network access device and micro-USB version of IEEE 802.15.4 bridge for ACSD networks

摘要

This disclosure focuses on the development of a micro-usb module that allows a smart-device to transmit and receive IEEE 802.25.4 messages via a connection through the phone's micro-usb slot without the need for an additional external battery. This disclosure focuses on the implementation of the ACSD Protocols through the use of a Secure Handheld Network Access Device (HNAD). The functional goal of a Secure Handheld Network Access Device (HNAD) is to provide a bidirectional wireless RF communication interface to Security Devices, based upon IEEE Standard 802.15.4-2006 physical and data link layer protocols.

主权项

1. A wireless bridge for wireless to TCP/IP based communication acting as a network access device (NAD) for an advanced container security device (ACSD) network, the network address device comprising:
an Android-based handheld network access device including:
a micro-USB port;a processor with memory;a radio frequency transceiver front end communicating with the processor;an antenna coupled to the front end; anda power source providing power to the processor and front end whereinthe processor with memory containing computer instructions for executing IEEE 802.15.4 standard compliant operations;
transmitting a network access device announcement (NADA) message representative of the initiation of passive network discovery to multiple end devices;determining whether a designated end device is network compliant;establishing communication with the compliant designated end device;and forwarding the NADA message to the designated end device;implementing a set of air interface protocols on the wireless side that allow for network discovery and status message exchanges with end devices whose addresses are not pre-programmed into the access device in advance in a connectionless manner;supporting network discovery and status message exchange requirements for end devices randomly moving in and out of network access device coverage;implementing a set of reduced medium access control (MAC)-layer messaging protocols to minimize RF channel traffic and coexistence with commercial standard 802 systems, and a micro-USB module for connecting the ACSD network with the Android-based device via the micro-USB port.