Multiplex communications – Channel assignment techniques – Combining or distributing information via code word channels...
Reexamination Certificate
1998-02-27
2001-06-26
Olms, Douglas (Department: 2661)
Multiplex communications
Channel assignment techniques
Combining or distributing information via code word channels...
C370S342000, C455S414200, C455S420000, C455S422100
Reexamination Certificate
active
06252883
ABSTRACT:
BACKGROUND OF THE INVENTION
Prior art, Spread ALOHA CDMA Data Communications, U.S. Pat. No. 5,537,397, has resolved the problems associated with providing multiple access to a data communications channel without prearranging times or querying availability, and with automatic offsetting of the identical form signals.
This invention now provides a fixed and mobile data telecommunication service using a fixed code (or several fixed codes), direct sequence spread spectrum, connection free data protocol as an overlay on cellular or PCS wireless services.
SUMMARY OF THE INVENTION
The invention provides both a fixed data telecommunication service, Home Data Service (HDS), and a mobile data telecommunication service, Personal Data Service (PDS), using a fixed code (or several fixed codes), direct sequence spread spectrum, connection free data protocol as an overlay on cellular or PCS wireless services.
The new overlay is designed for providing cost effective broad band fixed and mobile data services by overlaying a Spread Aloha Multiple Access (SAMA) network on existing cellular or PCS systems. It provides two-way data communication to customer premises for AMR and other services and utilizes existing cellular/PCS installations. In the home, interface to applications can be wired (including powerline signals), wireless or a mix.
In the Home Data Service, a wide band connectionless data protocol (>100 Kbps peak aggregate data rate at the hub) is employed to transmit packetized digital data from a variety of home sources (e.g. www inputs, e-mail, utility meter readings, security system data, in-home medical data, response and/or control data for cable or direct TV (direct broadcast satellite TV), and other “upstream” data signals through a building-mounted transmitter to a local cellular or PCS communications hub station. From the hub station the cellular/PCS provider routes the packet data into packet networks for delivery to a variety of recipient parties designated by address within the packets themselves.
The HDS provider supplies the building hardware and software required to gather and transmit the data to the cellular/PCS hub as well as the add-on hardware and software needed at the hub to receive and decode the data from the hundreds or thousands of buildings within the cell boundaries. The system is capable of both one- and two-way communications.
The data capability is provided as a supplement to the existing communications capability of the cellular/PCS system and overlays, but does not destructively interfere with, the preexisting voice (and/or other) connection oriented services.
Two options are used for the radio design. The HDS shares the spectrum allocated to the cellular or PCS system, or it is implemented using an entirely separate licensed or unlicensed frequency. In the former case, much of the radio system of the cellular or PCS hub station may be shared with the HDS (e.g., antenna, transmitter, receiver, amplifiers, etc.). In the latter instance, most of these systems are separately provided as part of the HDS.
In the Personal Data Service, the data service is delivered directly to individuals through mobile and/or portable devices which may either be moving (as in the case of the normal cellular or PCS subscriber) or be moveable from place to place. All other elements of the above description for the HDS implementation apply, other than the typical applications.
In this configuration, the PDS either is integrated into the portable voice hand sets used in cellular and PCS today, or is implemented in stand alone devices such as wireless modems, two-way pagers and other wireless mobile data devices. Such implementations serve to provide mobile individuals with two-way paging, e-mail, Internet access (including www), medical monitoring, and other services. Additionally, the PDS is utilized for efficient data communications for package or asset tracking, vehicle tracking, and other commercial or industrial mobile data services.
The preferred invention is focussed on overlaying Spread ALOHA data communications with broad band, connectionless data transmission on top of existing connection oriented cellular or PCS systems or on dedicated cellular-like structures, rather than using and therefore displacing their existing connection oriented services. Power, alarm and in-home health monitoring are some of many sources of data within the home. The invention is focussed on the digital telecommunication system between the home and the pre-existing and modified cell hub. The invention in the form of the Personal Data System provides the overlay data service for mobile users.
The Spread ALOHA system described in U.S. Pat. No. 5,537,397 preferably is used to separate the data packets arriving substantially simultaneously at the hub from the HDS and PDS data devices.
These and further and other objects and features of the invention are apparent in the disclosure, which includes the above and ongoing written specification, with the claims and the drawings.
REFERENCES:
patent: 5327478 (1994-07-01), Lebowitz
patent: 5343493 (1994-08-01), Karimullah
patent: 5390238 (1995-02-01), Kirk et al.
patent: 5537397 (1996-07-01), Abramson
patent: 5568535 (1996-10-01), Sheffer et al.
patent: 5675371 (1997-10-01), Barriger
patent: 5745485 (1998-04-01), Abramson
patent: 5758281 (1998-05-01), Emery
patent: 5761083 (1998-06-01), Brown
patent: 5923269 (1999-07-01), Shuey
patent: 6049711 (2000-04-01), Ben-Yehezkel
Abramson Norman
Schweickart Russell L.
Aloha Networks, Inc.
Creighton Wray James
Narasimhan Meera P.
Olms Douglas
Pizarro Ricardo M.
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