System supporting data/fax connection with a dual mode mobile telephone
First Claim
1. A mobile communications system, comprising:
- a dual mode analog/digital-mobile telephone supporting a digital traffic channel radio link protocol for data/fax communication;
a dual mode interface for interconnecting a piece of data terminal equipment and the dual mode analog/digital mobile telephone, the dual mode interface including a logical analog interface and a logical digital interface, wherein the logical analog interface supports a modem implementing an enhanced analog voice channel cellular modem protocol for data/fax communication;
a mobile communications network supporting set-up of a mobile communication with the dual mode analog/digital mobile telephone over an analog air interface including at least one analog voice channel and a digital air interface including at least one digital traffic channel;
a modem pool within the mobile communications network operable to terminate the enhanced analog voice channel cellular modem protocol;
an interworking function within the mobile communications network operable to terminate the digital traffic channel radio link protocol; and
means within the mobile communications network responsive to the mobile communications set-up of a data/fax call to or from the dual mode analog/digital mobile telephone for seizing the modem pool for that set-up call if the data/fax call is carried over an analog voice channel of the analog air interface and for seizing the interworking function for that set-up call if the data/fax call is carried over a digital traffic channel of the digital air interface.
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Accused Products
Abstract
An interface between a dual mode mobile station and a piece of data terminal equipment supports both a logical digital interface and a logical analog interface, with the analog interface passing through a modem. At set-up of either a mobile originated or mobile terminated data/fax call, a supporting dual mode communications network determines whether a digital traffic channel is available on an air interface. If so, the channel is allocated to the mobile station, and data/fax communication with the data terminal equipment occurs using the logical digital interface. Otherwise, an analog voice channel is allocated, and the data/fax communication with the data terminal equipment occurs using the logical analog interface and modem. Within the supporting network, data/fax communications via the digital traffic channel are routed through an interworking functionality that terminates a radio link protocol utilized for communicating over the digital air interface. Analog voice channel data/fax communications are instead routed through a modem pool that terminates a selected modem protocol utilized by the modem for communicating over the analog air interface.
16 Citations
15 Claims
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1. A mobile communications system, comprising:
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a dual mode analog/digital-mobile telephone supporting a digital traffic channel radio link protocol for data/fax communication; a dual mode interface for interconnecting a piece of data terminal equipment and the dual mode analog/digital mobile telephone, the dual mode interface including a logical analog interface and a logical digital interface, wherein the logical analog interface supports a modem implementing an enhanced analog voice channel cellular modem protocol for data/fax communication; a mobile communications network supporting set-up of a mobile communication with the dual mode analog/digital mobile telephone over an analog air interface including at least one analog voice channel and a digital air interface including at least one digital traffic channel; a modem pool within the mobile communications network operable to terminate the enhanced analog voice channel cellular modem protocol; an interworking function within the mobile communications network operable to terminate the digital traffic channel radio link protocol; and means within the mobile communications network responsive to the mobile communications set-up of a data/fax call to or from the dual mode analog/digital mobile telephone for seizing the modem pool for that set-up call if the data/fax call is carried over an analog voice channel of the analog air interface and for seizing the interworking function for that set-up call if the data/fax call is carried over a digital traffic channel of the digital air interface. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A mobile communications network, comprising:
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a dual mode analog/digital air interface comprising an analog air interface including at least one analog voice channel and a digital air interface including at least one digital traffic channel; a modem pool operable to terminate an enhanced analog voice channel cellular modem protocol; an interworking function operable to terminate a digital traffic channel radio link protocol; and a mobile switching center for supporting a set-up of a data/fax call to or from a mobile station over the dual mode analog/digital air interface, the mobile switching center operating at the time of call set-up to seize the modem pool in connection with handling the set-up data/fax call if the data/fax call is carried over an analog voice channel of the analog air interface and seize the interworking function in connection with handling the set-up data/fax call if the data/fax call is carried over a digital traffic channel of the digital air interface. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A method for dual mode analog/digital mobile communications network operation in connection with the handling of a mobile station originated or terminated data/fax call, comprising the steps of:
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seizing a modem pool in connection with an initial set-up of the data/fax call if the data/fax call is carried over an analog voice channel of an analog air interface, wherein step of seizing includes the step of terminating an enhanced analog voice channel cellular modem protocol utilized in communicating data/fax call information over the analog voice channel; and seizing an interworking function in connection with an initial set-up of the data/fax call if the data/fax call is carried over a digital traffic channel of a digital air interface, wherein the step of seizing includes the step of terminating a digital traffic channel radio link protocol utilized in communicating data/fax call information over the digital traffic channel. - View Dependent Claims (14, 15)
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Specification