Radio frequency communication network having adaptive communication parameters
3 Assignments
0 Petitions
Accused Products
Abstract
Improved apparatus for a radio communication network having a multiplicity of mobile transceiver units selectively in communication with a plurality of base transceiver units which communicate with one or two host computers for storage and manipulation of data collected by bar code scanners or other collection means associated with the mobile transceiver units. The radio network is adaptive in that in order to compensate for the wide range of operating conditions a set of variable network parameters are exchanged between transceivers in the network. These parameters define optimized communication on the network under current network conditions. Examples of such parameters include: the length and frequency of the spreading code in direct-sequence spread spectrum communications; the hop frame length, coding, and interleaving in frequency-hopping spread spectrum communications; the method of source encoding used; and the data packet size in a network using data segmentation. The invention is preferably to be applicable as an upgrade of an existing data capture system wherein a large number of hand-held transceiver units operate over an extensive area to gather data in various places, requiring the use of multiple base stations. In a variety of such installations such as warehouse facilities, distribution centers, and retail establishments, it may be advantageous to utilize not only multiple bases capable of communication with a single host, but with multiple hosts as well.
56 Citations
96 Claims
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1-47. -47. (canceled)
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48. A communications network for collecting data, segmenting the data and communicating the data segments, comprising:
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a first transceiver;
a second transceiver;
said first transceiver identifying the occurrences of failed transmissions from said first transceiver to said second transceiver, and, based on an evaluation of such occurrences, said first transceiver adjusts the size of data segments to be transmitted. - View Dependent Claims (49, 50, 51, 52, 53, 54, 55, 56)
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57. A method for use by a first controller in a wireless communications network, said method comprising:
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transmitting data segments to a second controller;
determining at least one occurrence of a failed transmission from said first controller to said second controller; and
adjusting, after said determining said at least one occurrence of a failed transmission, the size of data segments to be transmitted. - View Dependent Claims (58, 59, 60, 61, 62, 63, 64, 65, 66)
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67. A method of communicating between a first controller and a second controller over a wireless medium, said method comprising:
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sending, by said first controller, a data transmission to said second controller where said data transmission has a predetermined segment size;
determining, by said first controller, whether there was a failure by said second controller to receive at least one segment;
reducing, by said first controller, the segment size of said data transmission based on a determination of a failure of said second controller to receive at least one segment; and
resending, by said first controller, said data transmission to said second controller using said reduced segment size. - View Dependent Claims (68, 69, 70, 71, 72, 73, 74, 75, 76)
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77. A system, for use in a communications network for collecting data, segmenting the data and communicating the data segments, comprising:
a first controller, said first controller identifying the occurrences of failed transmissions from said first controller to a second controller, and, based on an evaluation of such occurrences, said first controller adjusts the size of data segments to be transmitted. - View Dependent Claims (78, 79, 80, 81, 82, 83, 84, 85, 86)
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87. A system for use in a wireless communications network, said system comprising:
a first controller, said first controller transmits data segments to a second controller, said first controller determines at least one occurrence of a failed transmission to said second controller, and said first controller, after determining said at least one occurrence of a failed transmission, adjusts the size of data segments to be transmitted. - View Dependent Claims (88, 89, 90, 91, 92, 93, 94, 95, 96)
Specification