| 摘要 |
A tag can communicate according to a cellular telephone network communication protocol, and includes one of: passive circuitry, semi-passive circuitry, or circuitry capable of communicating according to a radio frequency identification communication protocol or a satellite communication protocol. According to a different aspect, a tag can receive satellite signals containing positioning information, and can transmit according to one of a cellular telephone network communication protocol, a satellite communication protocol, and a wireless computer network communication protocol. According to yet another aspect, a tag can transmit according to each of first and second communication protocols that are each one of a radio frequency identification communication protocol, a cellular telephone network communication protocol, a satellite communication protocol, and a wireless computer network communication protocol.
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