Control channel synchronization between DBC and Cellular networks
First Claim
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1. A system for synchronizing the control channel of a downbanded Cellular network with the control channel of a conventional Cellular network, comprising:
- at least one downbanded Cellular switching center for processing control channel information at a first timing, and for generating first timing information which resects said first timing;
at least one standard Cellular switching center for processing control channel information at a second timing, and for generating second timing information which reflects said second timing; and
a monitor for receiving said first timing information and said second timing information, and for comparing said first timing information with said second timing information to produce a comparison result, and for providing an error signal when the comparison result exceeds a prescribed threshold indicating that the at least one downbanded Cellular switching center is unsynchronized with said standard Cellular switching center.
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Abstract
A downbanded Cellular network (DBC) is provided to supplement an adjacent or coincident standard Cellular network. The control channels used by the DBC and standard Cellular network are synchronized to ensure proper hand-off between the DBC network and the standard network. Synchronization is achieved by monitoring the separation in time between timing pulses transmitted by the DBC network and the standard Cellular network.
63 Citations
17 Claims
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1. A system for synchronizing the control channel of a downbanded Cellular network with the control channel of a conventional Cellular network, comprising:
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at least one downbanded Cellular switching center for processing control channel information at a first timing, and for generating first timing information which resects said first timing; at least one standard Cellular switching center for processing control channel information at a second timing, and for generating second timing information which reflects said second timing; and a monitor for receiving said first timing information and said second timing information, and for comparing said first timing information with said second timing information to produce a comparison result, and for providing an error signal when the comparison result exceeds a prescribed threshold indicating that the at least one downbanded Cellular switching center is unsynchronized with said standard Cellular switching center. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A monitor for detecting whether a control channel produced by a downbanded Cellular network is synchronized with a control channel produced by a standard Cellular network, comprising:
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a first receiver for receiving DBC timing indicia transmitted from said downbanded Cellular network, said DBC timing indicia defining a control channel timing state of said downbanded Cellular network; at least one additional receiver for receiving standard Cellular timing indicia transmitted from a standard Cellular network, said standard Cellular timing indicia defining a control channel timing state of said standard Cellular network; comparator logic for comparing said DBC timing indicia with said standard Cellular timing indicia and producing a comparison result; an error generator for generating an error signal indicating that said downbanded Cellular network is not synchronized with said standard Cellular network.
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10. A method for synchronizing the control channel of a downbanded Cellular network with the control channel of a conventional Cellular network, comprising:
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generating, using a downbanded Cellular switching center, timing information which reflects the timing used in the transmission of control channel information in a downbanded Cellular network; generating, using a standard Cellular switching center, timing information which reflects the timing used in the transmission of control channel information in a standard Cellular network; comparing, using a monitor, said timing information generated by said at least one downbanded Cellular switching center with said timing information generated by said at least one standard Cellular switching center to produce a comparison result; providing an error signal when the comparison result exceeds a prescribed threshold indicating that the at least one downbanded Cellular switching center is unsynchronized with said standard Cellular switching center. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification