Call routing in mobile telephone systems
First Claim
1. A method for providing continuous location data for a mobile radio telephone as said mobile phone enters visited cellular networks, said method comprising the steps of:
- receiving an access signal transmitted by said mobile phone;
determining if said access signal is a registration access or a call access;
determining if said access signal is a call release signal from said mobile phone;
storing registration access information from said mobile phone;
saving call access information from said mobile phone;
communicating registration access information to said mobile phone'"'"'s home network; and
ordering said home network to store a temporary location indication for said mobile phone if said access signal is a call access.
1 Assignment
0 Petitions
Accused Products
Abstract
A continuous and accurate location system for a mobile telephone subscriber which utilizes a temporary location indication as well as a registration location. If a visiting mobile subscriber sends a registration access, the visited system acknowledges the registration, records the mobile subscriber'"'"'s presence and signals the mobile subscriber'"'"'s home system of the mobile'"'"'s presence. Receipt of the mobile'"'"'s location from the visited system causes the mobile subscriber'"'"'s home system to update its registration location data for that particular mobile. If a visiting mobile subscriber initiates a call access from within the visited system without registering within the visited system, the visited system allocates a record for the mobile indicating within the record that it has not received a registration from the mobile and transmits to the home system a temporary location signal. The home system stores the temporary location indication, without deleting the existing registration location data for the mobile subscriber and deletes the indication upon the conclusion of the mobile subscriber'"'"'s call from within the visited system. The temporary location indication is used by the home system to effectuate the routing of calls for the mobile.
119 Citations
20 Claims
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1. A method for providing continuous location data for a mobile radio telephone as said mobile phone enters visited cellular networks, said method comprising the steps of:
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receiving an access signal transmitted by said mobile phone; determining if said access signal is a registration access or a call access; determining if said access signal is a call release signal from said mobile phone; storing registration access information from said mobile phone; saving call access information from said mobile phone; communicating registration access information to said mobile phone'"'"'s home network; and ordering said home network to store a temporary location indication for said mobile phone if said access signal is a call access.
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2. A method for providing continuous location data for a mobile radio telephone as said mobile phone enters visited cellular networks, said method comprising the steps of:
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receiving an access signal transmitted by said mobile phone; determining if said access signal is a registration access or a call access; determining if said access signal is a call release signal from said mobile phone; transmitting an order from said visited cellular system to said mobile phone'"'"'s home system to delete said stored temporary location for said mobile phone if said access signal transmitted by said mobile phone is a call release; storing registration access information from said mobile phone; saving call access information from said mobile phone; communicating registration access information to said mobile phone'"'"'s home network; and ordering said home network to store a temporary location indication for said mobile phone if said access signal is a call access.
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3. A method for monitoring the location of a mobile radio telephone while said mobile phone travels among visited cellular networks, said method comprising the steps of:
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storing the location of said mobile phone within said mobile phone'"'"'s home cellular network; updating the location of said mobile phone within said mobile phone'"'"'s home cellular network only upon said mobile phone'"'"'s registration access within a visited cellular network; indicating a temporary location for said mobile phone upon said mobile phone'"'"'s initiation of a call from a visited cellular system with which said mobile phone has not registered; and deleting said indication of said temporary location when said mobile phone ends said call from said visited cellular system with which said mobile phone has not registered. - View Dependent Claims (4, 5, 6, 7, 8, 9)
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10. A mobile communications system for accurately storing the location of a mobile radio telephone, said system comprising:
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at least one mobile radio telephone; a home system for said mobile phone, said home system storing location data pertaining to said mobile phone; at least one visited system in which said mobile phone can be located including means for detecting signals transmitted by said at least one mobile radio telephone and for distinguishing between registration access signals and call access signals within said detected signals; means responsive to the detection of either a registration access signal or a call access signal from a mobile radio telephone which is not registered with said visited system for allocating a record within said visited system to said mobile; means responsive to the detection of signals from said mobile for marking said allocated record as to whether or not said detected signals include a registration access signal; and means for transmitting information from said visited system to said home system of said mobile radio telephone indicative of the type of access signal received from said mobile radio telephone as to which a record has been allocated. - View Dependent Claims (11, 12, 13)
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14. A system for monitoring the location of a mobile radio telephone while said mobile phone travels among visited cellular networks, said system comprising:
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means for storing the location of said mobile phone within said mobile phone'"'"'s home cellular network; means for updating the location of said mobile phone within said mobile phone'"'"'s home cellular network only upon said mobile phone'"'"'s registration access within a visited cellular network; means for indicating a temporary location for said mobile phone upon said mobile phone'"'"'s initiation of a call from a visited cellular system within which said mobile phone has not registered; and means for deleting said indication of said temporary location when said mobile phone ends said call from said visited cellular system. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification