Method of establishing an adaptive public neighbor cell list for mobile stations of a private cellular system
First Claim
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1. A method of establishing a list of public neighbor cells for a private mobile communication system, said method comprising:
- scanning for transmissions from a plurality of public neighbor cell base stations a plurality of times;
identifying digital control channels of said plurality of public neighbor cell base stations from said transmissions;
forming a first set of digital control channels comprising those digital control channels with the greatest signal strengths from each of said plurality of scans of said plurality of public neighbor base stations; and
selecting the most relevant of said digital control channels for said list by forming a second set of digital control channels comprising only those digital control channels with the greatest signal strengths from said first set of digital control channels, wherein said second set of digital control channels is formed by adding digital control channels of decreasing signal strength if the number of digital control channels in said second set of digital control channels is less than the number of public neighbor cells.
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Abstract
A method for a Digital Wireless Office System (DWOS) to establish and update a public neighbor cell list for roaming mobile stations is disclosed. Transmissions of the base stations of public cells are scanned by DWOS scanners. Information from the Digital Control Channels and Broadcast Control Channels is used in formulating the list.
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12 Claims
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1. A method of establishing a list of public neighbor cells for a private mobile communication system, said method comprising:
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scanning for transmissions from a plurality of public neighbor cell base stations a plurality of times;
identifying digital control channels of said plurality of public neighbor cell base stations from said transmissions;
forming a first set of digital control channels comprising those digital control channels with the greatest signal strengths from each of said plurality of scans of said plurality of public neighbor base stations; and
selecting the most relevant of said digital control channels for said list by forming a second set of digital control channels comprising only those digital control channels with the greatest signal strengths from said first set of digital control channels, wherein said second set of digital control channels is formed by adding digital control channels of decreasing signal strength if the number of digital control channels in said second set of digital control channels is less than the number of public neighbor cells. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A private mobile communication system, comprising:
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a cellular radio exchange comprising a central processing unit;
at least one radio head controlled by said cellular radio exchange, said at least one radio head operable to communicate with at least one mobile station associated with said private mobile communication system; and
at least one scanning head controllable by said cellular radio exchange, said at least one scanning head operable to scan for transmissions by public neighbor cell base stations a plurality of times in order to establish a list of said public neighbor cell base stations;
wherein said central processing unit is programmed to form a first set of digital control channels comprising those digital control channels with the greatest signal strengths from each of said plurality of scans and select the most relevant of said digital control channels for said list by forming a second set of digital control channels comprising only those digital control channels with the greatest signal strengths from said first set of digital control channels by adding digital control channels of decreasing signal strength if and when the number of digital control channels in said second set of digital control channels is less than the number of public neighbor cells. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification