Multiplex communications – Communication over free space – Having a plurality of contiguous regions served by...
Reexamination Certificate
1997-12-11
2001-05-01
Olms, Douglas (Department: 2661)
Multiplex communications
Communication over free space
Having a plurality of contiguous regions served by...
C370S468000
Reexamination Certificate
active
06226280
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
This invention relates in general to telecommunication systems, and more particularly, to allocating and de-allocating transmission resources in a local multipoint distribution services system.
BACKGROUND OF THE INVENTION
A local multipoint distribution services (LMDS) system can be used to deliver various services to one or more fixed customer sites without a wireline connection. An exemplary system is described in U.S. patent application Ser. No. 08/345,183, filed on Nov. 28, 1994, and continuation application Ser. No. 08/845,976 filed on Apr. 30, 1997 entitled “Low Power, Short Range Point-To-Multipoint Communications System,” the entire disclosure of which is incorporated herein by reference. In one embodiment, an LMDS system can be coupled between a central office of a public switched telephone network (PSTN) and at least one telephone located at a customer site to provide telephony services. To deliver a telephone call between the central office and the telephone, such an LMDS system may utilize one of a number of time slots contained within one of a number of frequencies. The frequencies and time slots constitute transmission resources which may be re-used within the LMDS system. That is, a frequency and time slot could be allocated when needed to deliver a given call, and then de-allocated when the call has been completed. Prior systems for delivery of telephony services, such as classical (i.e., wireline) telephony and cellular, have not re-used both frequencies and time slots to deliver telephone calls, and accordingly, have not addressed the problem of allocating and de-allocating both of these transmission resources to support the re-use of these resources.
SUMMARY OF THE INVENTION
Accordingly, from the foregoing, there is a need for a method and system for allocating and de-allocating transmission resources in a local multipoint distribution services system.
According to an embodiment of the present invention, a method is provided for allocating and de-allocating transmission resources in a local multipoint distribution services system. In the method, one of an off-hook after idle signal and an incoming call request signal is detected. A frequency and a time slot for a call are assigned at a base system in response to the detection of either an off-hook after idle signal or an incoming call request signal. A customer premises equipment unit is tuned to the assigned frequency in order to deliver the call.
According to another embodiment of the present invention, a local multipoint distribution services system is provided. The local multipoint distribution services system includes a remote terminal, which can detect an incoming call request signal, and a customer premises equipment unit, which can detect an off-hook after idle signal. A base system is coupled to the remote terminal and the customer premises equipment unit. The base system assigns a frequency and a time slot for a call in response to either the detection of an incoming call request signal or an off-hook after idle signal. The customer premises equipment unit tunes to the assigned frequency for the call.
The present invention provides various technical advantages. For example, one technical advantage includes a protocol for allocating and de-allocating transmission resources in a local multipoint distribution services system. Other technical advantages are readily apparent to one skilled in the art from the following figures, descriptions, and claims.
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patent: 5818832 (1998-10-01), McCallister
patent: 5884148 (1999-03-01), Bilgic
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Cilia Andrew
Roark Charles W.
Robinson Michael L.
Olms Douglas
Pizarro Ricardo M.
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
Troike Robert L.
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