EP0417986A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Telephone system
Assignee: Nokia Oyj
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Filing: 1990-09-06
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Granted: —
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Expires: 2010-09-06
Abstract
Abstract The invention relates to a telephone system with which a connection between two subscribers can be established, at least one of them being a mobile subscriber. The system includes a paging network composed of one or several extensive paging ranges, each of them having a paging transmitter (Hl,H₂) of its own, a small cellular network with an exchange and a plurality of base stations (T), and mobile telephones with which a pager has been integrated. When calling a mobile telephone, the transmitter of the paging range in which the telephone is known or assumed to be transmits a paging message to the telephone, whereby, when the telephone is in the neighbourhood of the base station, the exchange of the cellular network establishes immediately a connection between the subscribers. No paging calls are lost because they are stored in the exchange of the cellular network, and on an appropriate occasion the pager of the telephone and the exchange compare the paging messages stored in the memories. In the disclosed system the call can be transmitted from one base station to another during the call (handover).
Inventors
- 👤 Lauri Levanto
- 👤 Jukka Tapio Ranta
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 06:12
CPC Classifications
H; H04; H04W; H04W68/00; Y; Y02; Y02D; Y02D30/00; Y02D30/70
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
176 words
A telephone system with which a connection can be established between two subscribers, at least one of them being a mobile subscriber, while the system comprises a paging network, a plurality of fixed stations and a plurality of mobile telephones, characterized in that - the mobile telephones are low-powered radio telephones with multiple channels, comprising a pager which is preferably provided with a common display, a keyboard, a control unit, and a memory together with the radio telephone, - a paging network consists of one or several extensive paging ranges, each of them being provided with a paging transmitter of its own (H1, H2), whereby a paging message is transmitted only in the paging range in which the mobile telephone receiving the paging message is known or assumed to be located, - the fixed stations are base stations (T) serving a plurality of users of a small cellular network, which has at least one exchange performing the control of the paging and telephone traffic, and in the memory of which the paging messages can be stored.
Claim 2
Dependent Claim
176 words
A telephone system with which a connection can be established between two subscribers, at least one of them being a mobile subscriber, while the system comprises a paging network, a plurality of fixed stations and a plurality of mobile telephones, characterized in that - the mobile telephones are low-powered radio telephones with multiple channels, comprising a pager which is preferably provided with a common display, a keyboard, a control unit, and a memory together with the radio telephone, - a paging network consists of one or several extensive paging ranges, each of them being provided with a paging transmitter of its own (H1, H2), whereby a paging message is transmitted only in the paging range in which the mobile telephone receiving the paging message is known or assumed to be located, - the fixed stations are base stations (T) serving a plurality of users of a small cellular network, which has at least one exchange performing the control of the paging and telephone traffic, and in the memory of which the paging messages can be stored.
Claim 3
Dependent Claim
62 words
A system according to claim 1, characterized in that the system is provided with apparatus with which a transfer of a call from one base station to another (handover) during a call can be performed when the receipt ranges of the base stations overlap but which send a warning to the mobile telephone if the transmission of the call cannot be performed.
Claim 4
Dependent Claim
37 words
A system according to claim 1, characterized in that the system comprises apparatus with which the mobile telephone enters the exchange when the paging area changes, whereafter the paging messages are transmitted to said new paging range.
Claim 5
Dependent Claim
20 words
A system according to claim 1, characterized in that the system can be connected to the public switching telephone network.
Claim 6
Dependent Claim
101 words
A procedure for using the system according to claim 1, characterized in that establishing a connection from an A subscriber to a mobile B subscriber whose location is not known takes place by way of the exchange of the cellular network transmitting the call of the A subscriber, said call possibly containing a paging message, e.g. a telephone number, by means of the paging network to the pager in the mobile telephone of the B subscriber, whereupon the B subscriber contacts, through the base station, the exchange which sets up the connection between the B subscriber and the waiting A subscriber.
Claim 7
Dependent Claim
37 words
A procedure according to claim 5, characterized in that the contacting of the B subscriber takes place automatically when the subscriber is in the receipt range of the base station or just entering the receipt range thereof.
Claim 8
Dependent Claim
53 words
A procedure according to claim 5, characterized in that when the A subscriber switches off the call before the connection of the B subscriber with the exchange of the cellular network, the B subscriber can make a call to the number indicated by the paging message stored in the memory of the pager.
Claim 9
Dependent Claim
87 words
A procedure according to claim 5, 6 or 7, characterized in that when a call is made from a mobile telephone to a B subscriber outside the system, the telephone of the A subscriber transmits a message along the call channel to the base station containing the requisite information for setting up the call, whereby the exchange, after establishing a connection with the B subscriber, informs the telephone of the A subscriber of the speech channel through the base station to which it is expected to move.
Claim 10
Dependent Claim
40 words
A procedure according to any one of claims 5 to 8, characterized in that when the mobile telephone changes the paging range it informs the exchange either manually or automatically and in this manner informs of a new paging range.
Claim 11
Dependent Claim
66 words
A procedure according to claim 9, characterized in that all paging messages are stored in the exchange of the cellular network, and when the telephone makes a call, receives a call, or enters the exchange, the messages stored in the memory of the telephone and the exchange of the cellular network are compared, and the exchange transmits the missing messages to the telephone which belong thereto.
Claim 12
Dependent Claim
51 words
A procedure according to claim 10, characterized in that when establishing a call, or during the call the mobile telephone is able to move from one receipt range of the base station to another without switching off the connection (hand over) if the receipt ranges of the base stations are overlapping.
References Cited (Backward Citations)
No citation records indexed.
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