Remote radio data communication system with data rate switching
First Claim
1. A radio frequency data communication system for transmission of data collected by a multiplicity of mobile transceiver units, to a base transceiver, comprising:
- a base transceiver selectively operable at a limited data rate and at an increased data rate, the base transceiver supporting spread spectrum communications;
the multiplicity of mobile transceiver units selectively operable at the limited data rate and at the increased data rate, the mobile transceiver units supporting spread spectrum communications;
said mobile transceiver units responsive to transmissions by said base transceiver, and having control means therein to evaluate the feasibility of responding at said increased data rate;
said base transceiver effecting a communication link with one or more of said mobile transceiver units;
said mobile transceiver units for which a communication link with said base transceiver has not been established receiving the transmissions of said base transceiver to said mobile transceiver units with which a communication link has been established;
said mobile transceiver units evaluating for consistent reception of said transmissions to said one or more transceiver units;
said mobile units which consistently receive transmissions at the increased data rate responding to the base transceiver at said increased data rate when said base transceiver directs communication to said mobile unit.
6 Assignments
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Accused Products
Abstract
The present invention relates to a system and method for providing radio frequency communication of data collected by a multiplicity of mobile transceiver units to a base transceiver. The system comprises the base transceiver and the mobile transceiver units being selectively operable at limited and increased data rates. The mobile units respond to transmissions by the base transceiver, and have means to evaluate the feasibility of responding at the increased data rate. The base transceiver effects a communication link with one or more mobile units. The mobile units for which a communication link has not been established receives the transmissions of the mobile units with which a communication link has been established. The mobile units evaluate for consistent reception of transmissions to one or more transceiver units. The mobile units which consistently receive transmissions at the increased data rate respond at the increased data rate when communication is directed thereto.
134 Citations
97 Claims
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1. A radio frequency data communication system for transmission of data collected by a multiplicity of mobile transceiver units, to a base transceiver, comprising:
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a base transceiver selectively operable at a limited data rate and at an increased data rate, the base transceiver supporting spread spectrum communications; the multiplicity of mobile transceiver units selectively operable at the limited data rate and at the increased data rate, the mobile transceiver units supporting spread spectrum communications; said mobile transceiver units responsive to transmissions by said base transceiver, and having control means therein to evaluate the feasibility of responding at said increased data rate; said base transceiver effecting a communication link with one or more of said mobile transceiver units; said mobile transceiver units for which a communication link with said base transceiver has not been established receiving the transmissions of said base transceiver to said mobile transceiver units with which a communication link has been established; said mobile transceiver units evaluating for consistent reception of said transmissions to said one or more transceiver units; said mobile units which consistently receive transmissions at the increased data rate responding to the base transceiver at said increased data rate when said base transceiver directs communication to said mobile unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A wireless data communication system, comprising:
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a base station transceiver capable of communication with a plurality of mobile transceivers via a wireless network, each of the plurality of mobile transceivers employing one of a first data rate and a second data rate for transmission, based upon an evaluation of radio frequency operating conditions of the wireless network, the first data rate being higher than the second data rate; and the base station transceiver transmitting one or more messages usable by the plurality of mobile transceivers in performing the evaluation of radio frequency operating conditions of the wireless network, wherein the evaluation of radio frequency operating conditions of the wireless network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading signals, and wherein the base station transceiver and the mobile transceivers support the spread spectrum communications. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of determining a data rate in a wireless communication network, comprising:
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receiving at least one data message via the wireless communication network, the wireless communications network supporting spread spectrum communications; evaluating wireless communication network operating conditions based upon the received at least one data message, wherein evaluating the wireless communication network operating conditions comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading signals; selecting one of a first data rate and a second data rate based upon the evaluation of wireless communication network operating conditions, the second data rate being higher than the first data rate; and transmitting at least one data message via the wireless communication network using the selected data rate. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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37. One or more circuits in a mobile wireless communication device, comprising:
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receiver circuitry capable of receiving digital information communicated via a radio frequency network; at least one processor that evaluates operating conditions of the radio frequency network, the evaluating of operating conditions of the radio frequency network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading radio frequency signals, the at least one processor selecting one of a first data rate and a second data rate based upon the evaluation, the second data rate being higher than the first data rate; and transmitter circuitry capable of transmitting digital information at the selected data rate, via the radio frequency network, the transmitter circuitry being operatively coupled to the at least one processor, wherein the mobile wireless communication device supports spread spectrum communications. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51)
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52. A wireless data communication system, comprising:
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a mobile transceiver that, during operation, communicates with a base station transceiver via a wireless network, the mobile transceiver employing one of a first data rate and a second data rate for transmission, based upon an evaluation of radio frequency operating conditions of the wireless network, the first data rate being higher than the second data rate; and the mobile transceiver receiving one or more messages usable in performing the evaluation of radio frequency operating conditions of the wireless network, wherein evaluation of radio frequency operating conditions of the wireless network comprises evaluating a signal strength measurement, wherein evaluating a signal strength measurement comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading signals, and wherein the mobile transceiver and the base station transceiver support spread spectrum communications. - View Dependent Claims (53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65)
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66. A wireless data communication system, comprising:
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a mobile device that, during operation, communicates with a base station via a wireless network, the mobile device employing one of a first data rate and a second data rate for transmission, based upon an evaluation of a radio frequency operating conditions of the wireless network, the first data rate being higher then the second data rate, and the mobile device receiving one or more messages usable in performing the evaluation of radio frequency operating conditions of the wireless network, wherein the evaluation of radio frequency operating conditions of the wireless network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading signals, and wherein the mobile device and the base station support spread spectrum communications. - View Dependent Claims (67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80)
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81. One or more circuits in a mobile wireless communications device, comprising:
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at least one processor that evaluates operating conditions of a radio frequency network, the evaluating of operating conditions of the radio frequency network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading radio frequency signals, the at least one processor selecting one of a first data rate and a second data rate based upon the evaluation, the first data rate being lower than the second data rate; and the at least one processor causing transmitter circuitry to transmit information at the selected data rate, via the radio frequency network, wherein the mobile wireless communications device supports spread spectrum communications. - View Dependent Claims (82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95)
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96. One or more circuits in a mobile wireless communications device, comprising:
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at least one processor that evaluates operating conditions of a radio frequency network, the evaluating of operating conditions of the radio frequency network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading radio frequency signals, the at least one processor choosing between a higher data throughput and a lower data throughput based upon the evaluation, the higher data throughput and the lower data throughput being effected at least by employing different lengths of a length-adjustable spreading code for use in the spread spectrum communications; and the at least one processor causing transmitter circuitry to transmit information at the chosen data throughput via the radio frequency network, wherein the mobile wireless communications device supports spread spectrum communications in the radio frequency network.
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97. One or more circuits in a mobile wireless communications device, comprising:
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at least one processor that evaluates operating conditions of the radio frequency network, the evaluating of operating conditions of the radio frequency network comprises computing a weighted signal strength measurement, the weighting giving emphasis to lower signal strength measurements of fading radio frequency signals, the at least one processor choosing between a higher data throughput and lower data throughput based upon the evaluation, the higher data throughput and the lower data throughput being effected at least by employing different frequency hopping rates for use in the spread spectrum communications; and the at least one processor causing transmitter circuitry to transmit information at the chosen data throughput via the radio frequency network, wherein the mobile wireless communications device supports spread spectrum communications in the radio frequency network.
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Specification