Method and system for implementing extension phone within a cellular radio telecommunications network
First Claim
1. A method of providing extension phone service within a mobile radio communication system having an interrogation exchange, a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations, each one of said plurality of mobile stations being assigned to a single subscriber number, said method comprising the steps of:
- receiving a call from the interrogation exchange directed to said single subscriber number;
transmitting an individual paging message simultaneously to each one of said plurality of mobile stations;
establishing a voice channel with each one of said plurality of mobile stations that responded to said individual paging message;
sending a ringing signal to each one of said plurality of mobile stations having an established voice channel;
determining which ones of said plurality of mobile stations answered said ringing signal; and
selectively routing and delivering said call to a single one of said plurality of mobile stations that answered said ringing signal.
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Accused Products
Abstract
A method and system for providing extension phone service within a mobile radio communication system. The mobile radio communication system includes a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations. A single subscriber number is assigned to each one of the plurality of mobile stations. When a call is directed to the single subscriber number, the HLR transmits an individual routing request message to each one of the plurality of MSCs where mobile stations assigned to the single subscriber number are believed to be located. Each of the MSCs pages the mobile stations within its service area. Upon receiving a response from one or more of the paged mobile stations, each of the MSCs establishes voice channels with the responding mobile stations, and alerts the stations'"'"' subscribers. The MSCs then report to the HLR which of the alerted subscribers answered the alert. The HLR then selects one of the mobile stations, routes the call to the selected station, and releases the remaining answering mobile stations.
59 Citations
35 Claims
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1. A method of providing extension phone service within a mobile radio communication system having an interrogation exchange, a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations, each one of said plurality of mobile stations being assigned to a single subscriber number, said method comprising the steps of:
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receiving a call from the interrogation exchange directed to said single subscriber number;
transmitting an individual paging message simultaneously to each one of said plurality of mobile stations;establishing a voice channel with each one of said plurality of mobile stations that responded to said individual paging message; sending a ringing signal to each one of said plurality of mobile stations having an established voice channel; determining which ones of said plurality of mobile stations answered said ringing signal; and selectively routing and delivering said call to a single one of said plurality of mobile stations that answered said ringing signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. A system for providing extension phone service within a mobile radio communication network having an interrogation exchange, a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations, each one of said plurality of mobile stations being assigned to a single subscriber number, said system comprising:
- means for receiving a call from the interrogation exchange directed to said single subscriber number;
means for transmitting an individual paging message simultaneously to each one of said plurality of mobile stations; means for establishing a voice channel with each one of said plurality of mobile stations that responded to said individual paging message; means for sending a ringing signal to each one of said plurality of mobile stations having an established voice channel; means for determining which ones of said plurality of mobile stations answered said ringing signal; and means for selectively routing and delivering said call to a single one of said plurality of mobile stations that answered said ringing signal. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
- means for receiving a call from the interrogation exchange directed to said single subscriber number;
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35. A method of providing extension phone service within a mobile radio communication system having an interrogation exchange, a home location register (HLR), a plurality of mobile switching centers (MSCs), and a plurality of mobile stations, said method comprising the steps of:
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assigning a single subscriber number to each one of said plurality of mobile stations; maintaining a list of parameters within said HLR for said single subscriber number, each one of said parameters identifying one of said plurality of mobile stations, and one of said plurality of MSCs in which said identified mobile station is believed to be currently located; receiving a call directed to said single subscriber number in said HLR; transmitting, from said HLR, an individual routing request message to each one of said plurality of identified MSCs for the subscriber number; paging each one of said plurality of identified mobile stations with said plurality of identified MSCs; establishing in said plurality of identified MSCs voice channels with each one of said plurality of identified mobile stations that responded to said page; sending an alert signal from each of said identified MSCs to each one of said plurality of identified mobile stations with an established voice channel; determining which ones of said plurality of identified mobile stations answered said alerting signal; receiving, in said HLR, a response from each one of said plurality of MSCs identifying which ones of said plurality of identified mobile stations answered said alerting signal; and selectively routing and delivering said call to a single one of said plurality of responding mobile stations utilizing a predefined set of criteria.
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Specification