CDMA transmission delay method and apparatus
First Claim
1. In a cellular telephone system wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with handoff means for maintaining continuous communication with a plurality of mobile telephones moving from cell to cell;
- a cell having a plurality of antenna sets, each set being positioned and having transmitting and receiving means directionally configured to limit propagation of signals substantially to a zone within the boundaries of said cell;
means for assigning at least one of the identification codes of the assigned set thereof to at least one mobile telephone located in said cell including means for generating a signal having a unique identification code of the assigned set thereof for identifying said at least one of said mobile telephones;
means for coupling the signal to the zones;
at least one combiner for combining signals from all the zones in said cell; and
a receiver coupled to said combiner for retrieving signals having said unique identification code.
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Accused Products
Abstract
A cellular telephone system is described of the type wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with means for maintaining continuous communication with mobile telephones moving from cell to cell. The system allows multiple access by including means for assigning at least one of the in the assigned set of identification codes to more than one mobile telephone. A unique identification code is assigned to a mobile telephone located in the cell. A signal having a unique identification code is generated for identifying the mobile telephone. The signal is coupled to the zones. A combiner is also provided for combining signals from all of the zones in the cell. A receiver is coupled to the combiner for retrieving the signals having the code. According to another aspect of the invention, the signal coupled to the zones is delayed so that the transmission of the signal among the plurality of antenna sets is delayed by a preselected amount so as to reduce interference caused by successive reception of signals.
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Citations
10 Claims
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1. In a cellular telephone system wherein a plurality of contiguous cells, each having an assigned set of identification codes, are arranged with handoff means for maintaining continuous communication with a plurality of mobile telephones moving from cell to cell;
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a cell having a plurality of antenna sets, each set being positioned and having transmitting and receiving means directionally configured to limit propagation of signals substantially to a zone within the boundaries of said cell; means for assigning at least one of the identification codes of the assigned set thereof to at least one mobile telephone located in said cell including means for generating a signal having a unique identification code of the assigned set thereof for identifying said at least one of said mobile telephones; means for coupling the signal to the zones; at least one combiner for combining signals from all the zones in said cell; and a receiver coupled to said combiner for retrieving signals having said unique identification code. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification