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United States Patent (19) 11 Patent Number: 6,009,247 Canora Et Al

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United States Patent (19) 11 Patent Number: 6,009,247 Canora Et Al US006009247A United States Patent (19) 11 Patent Number: 6,009,247 Canora et al. (45) Date of Patent: Dec. 28, 1999 54 PORTABLE COMPUTER NETWORK 5,218,344 6/1993 Ricketts .................................. 340/573 5,291,193 3/1994 Isobe et al. 340/825.69 75 Inventors: Frank J. Canora, Millbrook, N.Y.; 5,566,366 10/1996 Russo et al. ............................ 455/343 Michael Frank Cina, Elizabethtown, 5,668,977 9/1997 Swanstorm et al. .................... 395/500 Pa.; Brian Paul Gaucher, New 5,696,903 12/1997 Mahany ............................. 395/200.58 Milford, Conn.; Paul Francis Greier, 5,732,360 3/1998 Jarett et al. ............................. 455/552 Carmel, N.Y.; Richard Ian Kaufman, 5,765,027 6/1998 Wang et al. ............................ 395/860 Somers, N.Y.; Alphonso Philip 5,768,531 6/1998 Lin ..................................... 395/200.72 Lanzetta, Marlboro, N.Y.; Lawrence OTHER PUBLICATIONS Shungwei Mok, Brewster, N.Y.; Robert Stephen Olyha, LaGrange, N.Y.; Saila Universal Wireless Connectivity for Portable Computers Ponnapalli, Fishkill, N.Y.; John LeRoy IBM Technical Disclosure Bulletin vol. 37 No. 048 Apr. Staples, Pleasantville, N.Y. 1994 pp. 91-93. 73 Assignee: International Business Machines Primary Examiner Ayaz R. Sheikh Corporation, Armonk, N.Y. Assistant Examiner Raymond N Phan Attorney, Agent, or Firm-Daniel P. Morris; Alvin J. 21 Appl. No.: 08/739,248 Riddles 22 Filed: Oct. 29, 1996 57 ABSTRACT A portable or notebook type computer communication inter (51) Int. Cl." ...................................................... G06F 13/38 face that permits portable computers to be reliably used in a 52 U.S. Cl. .......................... 395/309; 395/281; 395/856; data processing network. The interface involves communi 395/857; 395/200.57; 395/20079; 395/200.8; cation circuitry, Special device inputs and power monitoring 455/552 and charging. A flexible portable computer wireless time and 58 Field of Search ..................................... 395/281–283, frequency division network is formed using a time and 395/309, 856, 857, 858, 2008, 200.57, frequency division multiplexed communication channel 200.58, 200.79; 455/556-557 assignment feature that together with a wireleSS link estab lishes a unique direct communication channel between data 56) References Cited processing devices on different levels with data packet type U.S. PATENT DOCUMENTS transmission security. The principle permits each portable 4,812,842 3/1989 Bayerlein et al. ................. 340/825.72 computer in the network to communicate with any other and 5,128,981 7/1992 Tsukamoto et al. ...................... 379/58 any and all can transmit and receive at the same time. 5,136,285 8/1992 Okuyama ............. 340/870.11 5,204,768 4/1993 Tsakiris et al. ......................... 359/148 6 Claims, 3 Drawing Sheets 81 HGHER HIGHER HGHER LEVEL LEVEL LEVEL DATA DATA DATA PROCESSOR PROCESSOR PROCESSOR 2 PORTABLE PORTABLE PORTABLE COMPUTER COMPUTER COMPUTER 1 NTERFACE INTERFACE INTERFACE LEVEL LEVEL LEVEL DATA DATA DATA PROCESSOR PROCESSOR PROCESSOR PORTABLE PORTABLE PORTABLE COMPUTER COMPUTER COMPUTER NTERFACE INTERFACE INTERFACE U.S. Patent Dec. 28, 1999 Sheet 1 of 3 6,009,247 FREQUENCY SYNTHESIZER 40 MICRO CONTROLLER MODEM TRANSCEVE R 39 U.S. Patent Dec. 28, 1999 Sheet 2 of 3 6,009.247 70 71 66 67 69 POWER BATTERY SUPPLY 60 68 55 TRANSCEVER MODEM MICRO- 56 CONTROLLER 59 57 FREQUENCY 65 SYNTHESIZER 64 61 63 A/D FG.3 62 3Q 31 50 30 30 30 31 30 30 30 30 31 30 93 9495 93 9495 FIG.5 U.S. Patent Dec. 28, 1999 Sheet 3 of 3 6,009.247 W170 }}OSSEOO}}d 6,009,247 1 2 PORTABLE COMPUTER NETWORK data interconnection, battery charging and battery level monitoring and Sending and receiving wireleSS Signal trans CROSS REFERENCE TO RELATED PATENTS mission. This invention arose during development efforts related to the subject matter of U.S. patent application Ser. No. 08/739, BRIEF DESCRIPTION OF THE DRAWINGS 692 filed Oct. 20, 1996. FIG. 1 is an illustration of a portable battery powered computer device positioned in the docking and charging FIELD OF THE INVENTION Station of the invention with Special input attachments. The invention is directed to a communicating interface for FIG. 2 is an input/output wiring diagram in the portable portable type computers for use in a data processing net computer communication interface of the invention device work. including battery level indication and direct connection features. BACKGROUND AND RELATION TO THE FIG. 3 is an input/output wiring diagram in the portable PRIOR ART 15 computer communication interface of the invention for each In computer Systems there are evolving, architectural Stand alone portable computer including battery level main configurations where one or a plurality of computer devices tenance and direct connection features. may interact with one or a plurality of other computer FIG. 4 is an illustration of the portable computer com devices in a network. All devices generally have interfaces munication interface of the invention in a network of higher that provide input/output capability for human users. In and lower level data processing devices. computer networks it is becoming desirable for any user at FIG. 5 is a schematic chart of a serial, time division and any interface to be able to interact with any other device in frequency multiplexed channel communication arrangement the network. in the invention between an upper level data processing The main approach in interconnecting data processing device and multiple lower level data processing devices. devices has been through cables. The use of cables however 25 places a Significant limitation on ability to communicate and DESCRIPTION OF THE INVENTION on flexibility of physical placement of devices. In the art portable computer devices have reached high The evolution in portable computerS has resulted in quite levels of computational power but they have limitations computationally powerful notebook size devices. Such where it becomes desirable to incorporate them into a devices however do not readily interface with computer network environment. For portability frequently notebook networks. type computers have relatively Small displayS and keyboards There have been some attempts heretofore in the art to and for extended use as a user interface a cradle or docking provide interfacing communication between portable com Station is employed. The portable computer is inserted into puters and other data processing devices through the use of 35 the cradle or docking Station which provides larger user communication channels not involving wires, Such as elec interface elements. With Some portable computer devices tromagnetic and optical transmission. An example is in the Special attachments are being employed to provide as document IBM TDB Vol. 37 No. 4b April 94 Pages 91-93, examples graphic or handwriting input, Sound including where in there is described, wire less, optical or Voice input, mouse based cursor and Selection input and electromagnetic, communication of data, in packet format, 40 mathematical pad type input. The Special input attachments between a computer operating System and a portable com usually employ cables for communication to the computing puter through an interface that uses as a Single transmission device which are frequently incompatible with the docking criterion, only the presence of the portable computer device Station. The portable computer is usually battery powered. in the communication channel. Where a portable battery powered device is used in larger There is a need in the art for greater flexibility in data 45 Systems a closer monitoring of battery output level is needed processing System architecture to facilitate the use of por than is usually required for interfacing with the device itself. table computers in data processing networks. While the individual operator of a portable computer can usually Satisfactorily monitor the battery level, under con SUMMARY OF THE INVENTION ditions where the portable computer is being used in a The invention provides a communicating or docking 50 network, there is less feel for how much drain on the battery interface for a portable computer for use in a network of data is taking place and there is leSS freedom to interrupt. In processing devices. The docking interface provides inter accordance with the invention a cradling or docking com connecting for wireleSS communication, battery monitoring munication interface is provided that accomodates direct and charge maintenance, and input port capability for analog connecting of Special input attachments and cradling or and digital Signal type special attachment devices to the 55 docking of portable computational devices while providing portable computer. The communicating interface of the battery level monitoring and charging with wireleSS link invention permits reliable use of portable computers in a communication and for initial device information exchange. multi level network in which a time and frequency division The interface of the invention is illustrated in connection multiplex communication protocol used through a wireleSS with FIGS. 1, 2 and 3. FIG. 1 is a depiction of a portable link and with a data processing device arrangement in levels, 60 computing device in a cradling or docking Station hardware permits data exchange between data processing devices to Supporting member with Special input attachment connec be done in Secure data packet type transmissions that can all tions out of sight in the view. FIG. 2 is a functional
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