SYSTEM AND METHOD FOR DETERMINING DATA RATE
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Accused Products
Abstract
A hierarchical communication system is described in which two wireless local area networks exhibiting substantially different characteristics are employed to link inherently portable or mobile computer devices. A series of radio base stations make up a infrastructure network. The infrastructure network and at least one portable computer device make up the first local area network. The communication on the first local area network is accomplished by spread spectrum frequency hopping communication A second local area network allows for radio communication between a portable computer device and peripheral devices with built-in transceivers utilized by the portable computer device. The communication in each local area network is controlled by a reservation access communication protocol. The communication protocol facilitates frequency hopping synchronization and supports adaptive data rate selection based upon the quality of communication on the communication channel. The communication protocol prevents interference between communication on the first local area network and communication on the second local area network. In a premises LAN, a series of radio base stations and a backbone LAN make up an infrastructure network. The infrastructure network and at least one mobile computing device make up a higher-power LAN, utilizing a frequency hopping protocol. A lower-power LAN allows for radio communication between a mobile computing device and -peripheral devices, utilizing a single-frequency spread spectrum protocol. A vehicular LAN provides for short-range communication between a vehicle terminal and a portable terminal. When out of direct RF range of the premises LAN, the vehicle terminal maintains indirect communication when necessary with the premises LAN via one of several alternate RF channels. A microprocessor, located inside radio units which participate in multiple LAN'"'"'s, selects the appropriate protocol, frequency band and power level for communicating through the network.
45 Citations
107 Claims
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1-82. -82. (canceled)
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83. A method of determining data rate in a direct sequence spread spectrum system, the method comprising:
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receiving a signal that was transmitted at a particular data rate, wherein the particular data rate is one of a plurality of data rates and is unknown when received;
processing the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and
determining the particular data rate according to the sequence of bits. - View Dependent Claims (84, 85, 86, 87, 88, 89)
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90. A system for determining data rate in a direct sequence spread spectrum system, the system comprising:
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one or more circuits for receiving a signal that was transmitted at a particular data rate, wherein the particular data rate is one of a plurality of data rates and is unknown when received;
wherein the one or more circuits process the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and
wherein the one or more circuits determine the particular data rate according to the sequence of bits. - View Dependent Claims (91, 92, 93, 94, 95, 96)
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97. A system for determining data rate in a direct sequence spread spectrum system, the system comprising:
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at least one processor for receiving a signal that was transmitted at a particular data rate, wherein the particular data rate is one of a plurality of data rates and is unknown when received;
wherein the at least one processor processes the signal according to a first data rate, thereby generating a signal corresponding to a sequence of bits; and
wherein the at least one processor determines the particular data rate according to the sequence of bits. - View Dependent Claims (98, 99, 100, 101, 102, 103)
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104. A method of determining data rate in a communication system, the method comprising:
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receiving a direct sequence spread spectrum signal that was transmitted at a particular data rate, wherein the particular data rate is unknown to the receiver, wherein the particular data rate is one of a high data rate and a low data rate, and wherein the high data rate is a binary multiple of the low data rate;
processing the direct sequence spread spectrum signal according to the high data rate, thereby generating a despread signal corresponding to a sequence of bits;
determining the particular data rate according to an occurrence of repetition in the sequence of bits; and
initiating proper decoding mechanisms for the particular data rate. - View Dependent Claims (105)
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106. A system for determining data rate in a communication system, the system comprising:
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one or more circuits for receiving a direct sequence spread spectrum signal that was transmitted at a particular data rate, wherein the particular data rate is unknown to the receiver, wherein the particular data rate is one of a high data rate and a low data rate, and wherein the high data rate is a binary multiple of the low data rate;
said one or more circuits for processing the direct sequence spread spectrum signal according to the high data rate, thereby generating a despread signal corresponding to a sequence of bits;
said one or more circuits for determining the particular data rate according to an occurrence of repetition in the sequence of bits; and
said one or more circuits for initiating proper decoding mechanisms for the particular data rate. - View Dependent Claims (107)
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Specification