Telecommunications – Transmitter and receiver at same station – Radiotelephone equipment detail
Reexamination Certificate
1998-12-31
2001-05-15
Nguyen, Duc (Department: 2743)
Telecommunications
Transmitter and receiver at same station
Radiotelephone equipment detail
C455S450000, C455S460000, C455S461000
Reexamination Certificate
active
06233465
ABSTRACT:
TECHNICAL FIELD
The present invention relates generally relates to Generic C wireline and wireless interfaced communication systems, and more particularly to a call delivery routine for wireless unit extension calls which improves overall routing efficiency.
BACKGROUND ART
Generally, communication systems have been introduced which integrate wireless communication networks, such as a personal communication system (PCS), with existing wireline communication networks. In such systems, structure is provided for interfacing the capabilities of a land line telephone system with a radio link communications system, and to control the provision of private network service features for users of both radio link systems and land line systems. Call processing data associated with each subscriber is stored in a central service control point, or database, within the network. Call routing to either a land line or a wireless unit is controlled by a mobile controller network element in conjunction with the central database. Known systems can typically support all the services unique to each of the wireline telephone network and the wireless network using a single directory number and a central database.
However, efficiency in call routing for such integrated systems is directly dependent upon whether the wireline class 5 switch has an established access connection to an access manager or controller to which a destination wireless unit is currently registered. More specifically, because a single directory number is employed in known systems, calls to a wireless subscriber are routed to an associated wireline switch. The problem encountered with such arrangements is that if the associated wireline does not have an access connection to an access controller currently serving the intended wireless subscriber, an interoffice call over interoffice trunk lines must be set up to forward the call to a wireline switch which does have access to the serving access controller. Setting up of such an interoffice call adds delay to the call routing process, thereby decreasing system efficiency. In addition, since wireless systems typically incur additional cost charges for connecting wireline switches and trunk lines to route calls, the use of interoffice trunk lines to route calls also adds to a wireless system's operational costs.
Therefore, a needs exists for a call routing arrangement which supports wireless extension in an integrated wireline and wireless communication system which reduces the need for interoffice calls.
DISCLOSURE OF INVENTION
Accordingly, it is an object of the present invention to provide a method and system for supporting wireless service extension in an integrated wireline and wireless communication system which increases efficiency and reduces use of wireline resources by eliminating the need to use interoffice trunk lines to forward calls to wireless units currently being served by an access manager not connected to a transferring wireline switch.
It is another object of the present invention to provide a method and system for supporting wireless service extension in an integrated wireline and wireless communication system which increases efficiency by directly transferring calls to wireless units using high speed access manager-to-access manager communication links.
In carrying out the above objects and other objects, the present invention provides a method and system for selectively directing call traffic originating from the wireline network to a mobile transceiver unit associated with a particular wireline termination unit via a wireless extension service. The present invention provides a wireline switch assigned to handle calls to and from the subscriber wireline termination unit, and a wireless unit location register for maintaining a database for each of a plurality of geographic coverage areas. The database contains information indicative of mobile transceiver unit registration status and location. An access manager is located within each of the plurality of geographic coverage areas and arranged to communicate with the wireless unit location register for managing mobility of mobile transceiver units within the system. Each of the access manager s is linked by an inter-access manager communication line. In addition, each wireline switch is directly linked to an access manager located in a corresponding geographic area. Each access manager is arranged to determine whether an incoming call from the wireline switch is intended for a mobile transceiver unit currently being serviced by a different access manager, and automatically transferring the call to the serving access manager via the inter-access manager communication line. In accordance with a preferred embodiment, the inter-access manager communication line is implemented in the form of a high speed ATM line.
The above objects and other objects, features, and advantages of the present invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.
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Cook Charles I.
Smith Dennis C.
Brooks & Kushman P.C.
Nguyen Duc
Qwest Communications International Inc.
Taylor Barry W.
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