Electrical computers and digital processing systems: support – Multiple computer communication using cryptography
Reexamination Certificate
1999-04-16
2002-10-29
Peeso, Thomas R. (Department: 2132)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
C713S161000
Reexamination Certificate
active
06473858
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to the field of digital communications. In particular the present invention discloses a packet switched digital broadcast communication system for broadcasting digital data with privacy and access control features.
BACKGROUND OF THE INVENTION
The Internet has become the standard system for allowing different computer systems communicate. The Internet consists of a global interconnection of computer networks that share a common suite of communication protocols. Specifically, all the computers on the Internet communicate using the Transport Control Protocol and the Internet Protocol (TCP/IP).
The very popular global Internet has made the well-known Transport Control Protocol and Internet Protocol (TCP/IP) into the de facto standard digital communication protocol. However, TCP/IP was originally designed for one to one, sender to receiver, communication. As the popularity of the Internet has gained, the data traffic load on the Internet has greatly increased. Due to the popularity of the Internet and its rapid growth, it is common to experience Internet “Brown-outs” caused by data traffic jams. To facilitate data communication, several methods of avoiding these data traffic jams have been devised.
One method of avoiding the problems is to create a private “intranet.” An intranet is a privately owned and used computer network that uses Internet protocols such as TCP/IP. Creating a private intranet is a very expensive proposition. Thus, the technique of creating private intranets to relieve traffic problems is only practical for cost insensitive projects.
It is well known that much of the traffic carried by the global Internet is redundant information. For example, millions of World Wide Web viewers access the same web pages and the same video streams from popular World Wide Web sites. For example, many people retrieve the same news information from the CNN interactive located at http://www.cnn.com/. Such popular World Wide Web sites therefore send the same web pages and the same video streams to the millions of World Wide Web viewers on individual unicast transport connections. All of these individual unicast streams create a large amount of redundant Internet traffic.
To help reduce data traffic jams caused by redundant information streams, a multicast protocol was created for the Internet. The Internet multicast protocol uses a single data stream to carry the same information to multiple recipients. Each new recipient “subscribes” to a desired multicast stream. When a new multicast protocol recipient subscribes to a multicast stream, the upstream routers that couple the recipient to the multicast stream begin routing a copy of the desired multicast stream to the network that the new recipient is attached to.
Internet multicasting promises to reduce Internet traffic by eliminating redundant information streams. However, there are several problems associated with Internet multicasting. One large problem is that Internet multicasting is currently not well supported by much of the current Internet infrastructure. For example, many of the older routers and switches on the Internet do not support multicast routing. Another problem with Internet multicasting is that there are very few quality-of-service guarantees for Internet traffic such that multicast streams are not guaranteed reliable service. Yet another problem with Internet multicasting is that there is no inherent data security or access control for multicast streams such that any entity can tap into and monitor Internet multicast streams.
Due to the above described and other problems associated with Internet multicasting, the popularity of Internet multicasting has been limited. Therefore, the number of software applications that support the Internet multicast protocol is limited. Although Internet multicast shows promise, it would be desirable to have improved methods of delivering Internet multicast information.
SUMMARY OF THE INVENTION
The present invention discloses a directed data broadcast system. The directed data broadcast system operates by accepting a plurality of data streams from a plurality of different data origination sources at a centralized data broadcast center. The data broadcast center processes the incoming data streams by encrypting, addressing, and multiplexing the data streams into a single combined data stream. The combined data stream is then modulated and broadcast on a broadcast medium such as radio frequency. A plurality of receiver systems receive the signal broadcast across the broadcast communication medium. Each receiver demodulates the broadcast signal to retrieve the combined data stream. The receiver then selects packets addressed for that particular receiver or a group to which the receiver belongs. The selected packets are decrypted and multicast on a LAN coupled to the receiver to deliver to an application.
Other objects, features, and advantages of present invention will be apparent from the company drawings and from the following detailed description.
REFERENCES:
patent: 4958230 (1990-09-01), Jonnalagadda et al.
patent: 5029003 (1991-07-01), Jonnalagadda
patent: 5184218 (1993-02-01), Gerdes
patent: 5200715 (1993-04-01), Gerdes et al.
patent: 5247575 (1993-09-01), Sprague et al.
patent: 5327237 (1994-07-01), Gerdes et al.
patent: 5351293 (1994-09-01), Michener et al.
patent: 5387941 (1995-02-01), Montgomery et al.
patent: 5410360 (1995-04-01), Montgomery
patent: 5457714 (1995-10-01), Engel et al.
patent: 5550576 (1996-08-01), Klosterman
patent: 5557333 (1996-09-01), Jungo et al.
patent: 5559559 (1996-09-01), Jungo et al.
patent: 5572247 (1996-11-01), Montgomery et al.
patent: 5577042 (1996-11-01), McGraw et al.
patent: 5585858 (1996-12-01), Harper et al.
patent: 5615264 (1997-03-01), Kazmierczak et al.
patent: 5615338 (1997-03-01), Poole et al.
patent: 5617148 (1997-04-01), Montgomery
patent: 5617565 (1997-04-01), Augenbraun et al.
patent: 5632007 (1997-05-01), Freeman
patent: 5671283 (1997-09-01), Michener et al.
patent: 5671377 (1997-09-01), Bleidt et al.
patent: 5684525 (1997-11-01), Klosterman
patent: 5691986 (1997-11-01), Pearlstein
patent: 5708476 (1998-01-01), Myhrvold et al.
patent: 5724091 (1998-03-01), Freeman et al.
patent: 5731841 (1998-03-01), Rosenbaum et al.
patent: 5739866 (1998-04-01), Kim et al.
patent: 5742357 (1998-04-01), Griesbaum
patent: 5745185 (1998-04-01), Portron et al.
patent: 5748789 (1998-05-01), Lee et al.
patent: 5758258 (1998-05-01), Shoff et al.
patent: 5761606 (1998-06-01), Wolzien
patent: 5764762 (1998-06-01), Kazmierczak et al.
patent: 5774172 (1998-06-01), Kapell et al.
patent: 5774664 (1998-06-01), Hidary et al.
patent: 5778181 (1998-07-01), Hidary et al.
patent: 5778187 (1998-07-01), Monteiro et al.
patent: 5781228 (1998-07-01), Sposato
patent: 5790198 (1998-08-01), Roop et al.
patent: 5797001 (1998-08-01), Augenbraun et al.
patent: 5805763 (1998-09-01), Lawler et al.
patent: 5815145 (1998-09-01), Matthews, III
patent: 5815195 (1998-09-01), Tam
patent: 5825927 (1998-10-01), Boyce et al.
patent: 5828839 (1998-10-01), Moncreiff
patent: 5828945 (1998-10-01), Klosterman
patent: 5831679 (1998-11-01), Montgomery et al.
patent: 5857181 (1999-01-01), Augenbraun et al.
patent: 5861881 (1999-01-01), Freeman et al.
patent: 5861906 (1999-01-01), Dunn et al.
patent: 5867657 (1999-02-01), Bolosky et al.
patent: 5874985 (1999-02-01), Matthews, III
patent: 5896414 (1999-04-01), Meyer et al.
patent: 5900905 (1999-05-01), Shoff et al.
patent: 5903563 (1999-05-01), Rashid et al.
patent: 5903673 (1999-05-01), Wang et al.
patent: 5907323 (1999-05-01), Lawler et al.
patent: 5913038 (1999-06-01), Griffiths
patent: 5918002 (1999-06-01), Klemets et al.
patent: 5923328 (1999-07-01), Griesmer
patent: 5923362 (1999-07-01), Klosterman
patent: 5945987 (1999-08-01), Dunn
patent: 5953012 (1999-09-01), Veghte et al.
patent: 5959508 (1999-09-01), Aitken
patent: 5966637 (1999-10-01), Kanungo et al.
patent: 5983005 (1999-11-01), Monteiro et al.
patent: 6006256 (1999-12-01), Zdepski et al.
MediaStorm II Brochure, Jul. 5, 1999, 2
Fu Castor
Johansen Dag H.
Mulligan Geoff
Peting Mark
Shimomura Tsutomu
Blakely & Sokoloff, Taylor & Zafman
Digeo, Inc.
Peeso Thomas R.
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