baber/WOPTO huggingface dataset:
Patent MX-PA04008295-A (MX)
Title: Polyester fiber and false twist yarn comprising the same.
Inventor: KEIJIRO HATTORI
IPC: C08G63/87
Filed: 2003-12-26
Abstract: Polyester fibers having a single-fiber fineness of 0.1 to 1.0 dtex are produced from a polyester polymer obtained by condensation-polymerizing an aromatic dicarboxylate in the presence of a catalyst which comprises a mixture of a titanium compound ingredient (A) comprising a titanium alkoxide and at least one product of the reaction of the titanium alkoxide with a specific carboxylic acid or anhydride thereof and a specific phosphorus compound ingredient (B) and/or comprises a product of the reaction of a titanium compound ingredient (C) with a specific phosphorus compound ingredient (D). The fibers obtained have a satisfactory color tone (low value of b) and stable suitability for false twisting with stretching and are excellent in appearance and performance.
Patent MX-PA04012345-A (MX)
Title: 2, 5-substituted pyrimidine derivatives as ccr-3 receptor antagonists ix.
Inventor: DANIEL HARRY ROGERS
IPC: C07D401/12
Filed: 2003-06-25
Abstract: This invention relates to pyrimidine derivatives of Formula (I), wherein Ar1, Ar2, R1-R5, X, Z and alk are as defined in the specification. The compounds are useful as CCR-3 receptor antagonists and therefore, may be used for the treatment of CCR-3 mediated diseases.
Patent MX-PA05000109-A (MX)
Title: Cleaners for the control and removal of allergens.
Inventor: WILLIAMSON BRUCE SCOTT
IPC: C11D7/42
Filed: 2003-05-23
Abstract: Wet and dry wipes comprising additives for removing allergens from surfaces are disclosed. The wipe substrate comprises an additive capable and binding the allergen onto the substrate such that the allergen can be removed from the surface. Various allergens including animal and pet dander can be removed from numerous surfaces utilizing the wipes of the present invention. In some embodiments of the invention, the allergenicity of the allergen is also reduced. Suitable additives for immobilization onto the wipe substrate include lectins, proteases, and enzyme inhibitors.
Patent MX-PA05000689-A (MX)
Title: Diecast cylinder crankcase.
Inventor: WODARSKI HEINRICH
IPC: F02F1/10
Filed: 2003-07-01
Abstract: The invention relates to a diecast cylinder crankcase into which a liner (4) consisting of a plurality of cylinder sleeves is cast. Said liner (4) is produced by sandcasting and is placed in the diecasting mould. The liner (4) comprises an at least partially closed water jacket (6) which can optionally comprise cooling channels (10) in the connecting section (12).
Patent MX-PA05002683-A (MX)
Title: Smoke suppressant hot melt adhesive composition.
Inventor: YARIAN CHASE CHERYL L
IPC: C09J201/00
Filed: 2003-09-12
Abstract: A hot melt adhesive composition that includes thermoplastic polymer, a source of zinc, at least one of aluminum trihydrate and magnesium hydroxide, and no greater than 70 % by weight of a source of halogen. Articles that include a porous substrate and the hot melt adhesive composition.
Patent MX-PA05003705-A (MX)
Title: Antitumor vaccination using allogeneic tumor cells expressing alpha (1,3)-galactosyltransferase.
Inventor: GABRIELA ROSSI
IPC: A61K39/00
Filed: 2003-10-09
Abstract: The invention relates to methods and compositions for causing the selective targeting and killing of tumor cells. Through ex vivo gene therapy protocols tumor cells are engineered to express AN alpha (1,3) galactosyl epitope. The cells are then irradiated or otherwise killed and administered to a patient. The alpha galactosyl epitope causes opsonization of the tumor cell enhancing uptake of the opsonized tumor cell by antigen presenting cells which results in enhanced tumor specific antigen presentation. The animalaCOEs immune system thus is stimulated to produce tumor specific cytotoxic cells and antibodies which will attack and kill tumor cells present in the animal.
Patent MX-PA05004318-A (MX)
Title: Channel estimation and spatial processing for tdd mimo systems.
Inventor: RODNEY WALTON J
IPC: H04J99/00
Filed: 2003-10-24
Abstract: Channel estimation and spatial processing for a TDD MIMO system. Calibration may be performed to account for differences in the responses of transmit/ receive chains at the access point and user terminal (512). During normal operation, a MIMO pilot is transmitted on a first link (522) and used to derive an estimate of the first link channel response (524), which is decomposed to obtain a diagonal matrix of singular values and a first unitary matrix containing both left eigenvectors of the first link and right eigenvectors of a second link (526). A steered reference is transmitted on the second link using the eigenvectors in the first unitary matrix (530), and is processed to obtain the diagonal matrix and a second unitary matrix containing both left eigenvectors of the second link and right eigenvectors of the first link (532). Each unitary matrix may be used to perform spatial processing for data transmission/reception via both links (540, 542, 550, 552).
Patent MX-PA05005634-A (MX)
Title: Closure device.
Inventor: FRANCIS BERTHON
IPC: E02D29/12
Filed: 2003-12-15
Abstract: The invention relates to device which is used to close an opening. The inventive device consists of a frame (4) which defines a through access opening (10) that is designed to receive a cover (6) and which comprises a frame knuckle (18). The frame knuckle (18) comprises a hinge surface (38) and a through knuckle opening (40). Moreover, the aforementioned frame (4) comprises an outer side and inner side. The inventive device also comprises a detachable plug element (52) which is disposed in a hole (50) of the frame knuckle (18) on the inner side of the surface of the hinge (38) and which essentially seals the inner side of the frame knuckle (18) in relation to the outside. The invention can be used for man holes.
Patent MX-PA05007037-A (MX)
Title: Industrial burner.
Inventor: GOLLADAY TIBBS M JR
IPC: F23D14/46
Filed: 2003-12-26
Abstract: An industrial burner assembly (10) characterized by a manifold (56) with a fuel inlet (58) and a longitudinal axis B, and a plurality of elongated burners (12) positioned radially about the longitudinal axis B having fuel ports (42) in communication with the manifold (56) and fuel inlet (58), wherein each elongated burner (12) has an outer mixing tube (14), an inner mixing tube (16) positioned coaxially within the outer mixing tube (14) to form an annular space (18) therebetween in communication with the fuel port (42), the inner mixing tube (16) having an inner surface (16b) forming a passage (40) for air flow through the burner assembly (10), and a plurality of apertures (20) formed in the inner mixing tube (16) to allow introduction of fuel from the annular space (18) into the air flow passage (40) to provide for efficient mixture of air and fuel in the burner assembly (10) prior to combustion.
Patent MX-PA05007154-A (MX)
Title: Prefilming atomizer.
Inventor: JAMES NASIATKA
IPC: B05B7/06
Filed: 2003-12-16
Abstract: A method of forming droplets comprises flowing a liquid (65) through a channel (60); spreading the liquid into a thin film in the channel; and impinging the thin film with a flowing gas (100) to atomize the liquid (65) into droplets. The droplets may then be dried to produce dried particles, such as particles comprising a pharmaceutical active agent. The droplets formed by the disclosed process have improved size and/or size distribution characteristics.
Patent MX-PA05008803-A (MX)
Title: Parts search system.
Inventor: JOHN F SCHICKLER
IPC: G06Q10/00
Filed: 2004-02-19
Abstract: This parts search system solves the problem of defining a correct part despite multiple definitions for replacement parts. The system employs a database or databases including: (a) the names, abbreviations, misspellings and word combinations for parts used in the assemblage of a device; (b) the possible manufacturers, parts and part numbers used in the assemblage of a device; and (c) applications, illustrations and other information related to the parts. A single code number, such as a VMRS code issued by the Technology and Maintenance Council of the American Trucking Associations, is assigned to each part. This code is used to link together and cross-reference all of the items in the database tables. Software is provided allowing the user to enter a multiplicity of choices of a word, abbreviation, misspelling, word combination, code, part number, and/or manufacturer and arrive at the correct part description, application, illustration and part number.
Patent MX-PA05009667-A (MX)
Title: Immunomodulating heterocyclic compounds.
Inventor: MATHEWS IAN RICHARD
IPC: A61P17/06
Filed: 2004-03-10
Abstract: Compounds of formula (I) are inhibitors of CD80 and useful in immunomodulation therapy: wherein R1 and R3 independently represent H; F; CI; Br; -NO2; -CN; C1-C6 alkyl optionally substituted by F or Cl; or C1-C6 alkoxy optionally substituted by F; R4 represents a carboxylic acid group (-COOH) or an ester thereof, or -C(=O)NR6R7, -NR7C(=O)R6, -NR7C(=O)OR6, -NHC(=O)NR7R6 or -NHC(=S)NR7R6 wherein R6 represents H, or a radical of formula - (Alk)m-Q wherein m is 0 or 1, Alk is an optionally substituted divalent straight or branched C1-C12 alkylene, or C2-C12 alkenylene, or C2-C12 alkynylene radical or a divalent C3-C12 carbocyclic radical, any of which radicals may contain one or more -O-, -S- or -N(R8)- links wherein R8 represents H or C1-C4 alkyl, C3- -C4 alkenyl, C3-C4 alkynyl, or C3-C6 cycloalkyl, and Q represents H; -NR9R10 wherein R9 and R10 independently represents H; C1-C4 alkyl; C3-C4 alkenyl; C3-C4 alkynyl; C3-C6 cycloalkyl; an ester group; an optionally substituted carbocyclic or heterocyclic group; or R9 and R10 form a ring when taken together with the nitrogen to which they are attached, which ring is optionally substituted; and R7 represents H or C1-C6 alkyl; or when taken together with the atom or atoms to which they are attached R6 and R7 form an optionally substituted monocyclic heterocyclic ring having 5, 6 or 7 ring atoms; and X represents a bond or a divalent radical of formula - (Z)n-(Alk)- or - (Alk)-(Z)n- -wherein Z represents -O-, -S- or -NH-, Alk is as defined in relation to R6 and n is 0 or 1.
Patent MX-PA05010779-A (MX)
Title: Torque resistant fastening element.
Inventor: LADOUSEUR HAROLD A
IPC: F16B33/00
Filed: 2005-10-06
Abstract: A torque resistant self-attaching fastener having a tubular barrel portion and a radial flange portion including a plurality of circumferentially spaced radial projections each having opposed planar generally radial side faces with the outer surface of the radial flange between the radial projections having a greater circumferential width than a circumferential width of the radial projections and a radial length less than the circumferential width. The side faces may be aligned with a radius, the side faces may be parallel or the side faces of adjacent radial projections may be parallel.
Patent MX-PA05011948-A (MX)
Title: Personal care compositions containing hydrophobically modified interference pigments.
Inventor: TANNER PAUL ROBERT
IPC: A61K8/29
Filed: 2004-05-10
Abstract: The present invention relates to personal care compositions containing interference pigments, a dispersed oil phase and a continuous aqueous phase. Preferably, the interference pigments are hydrophobically modified interference pigments. The inventors have found that hydrophobically modifying the pigments significantly improves the deposition of the particles on skin from rinsable compositions.
Patent MX-PA05012485-A (MX)
Title: Coatings for metal casting parts.
Inventor: DEININGER MARK
IPC: C23C10/26
Filed: 2004-05-06
Abstract: The method is disclosed for coating or impregnating a metal tool with a metal oxide to render the metal part more resistant to liquid metal attack or micro-welds. The method includes the steps of applying a liquid metal carboxylate composition, or a solution thereof, to a substrate material, and exposing the substrate to an environment that will cause vaporization or dissipation of any excess carboxylic acids in the liquid metal carboxylate composition while the metal carboxylates are being converted to metal oxides.
Patent MX-PA06008516-A (MX)
Title: Susceptibility gene for myocardial infraction, stroke, and paod; methods of treatment.
Inventor: HELGADOTTIR ANNA
IPC: C12Q1/00
Filed: 2005-01-31
Abstract: Linkage of myocardial infarction (MI) and a locus on chromosome 13q12 is disclosed. In particular, the FLAP gene within this locus is shown by genetic association analysis to be a susceptibility gene for MI and ACS, as well as stroke and PAOD. Pathway targeting for treatment and diagnostic applications in identifying those who are at risk of developing MI, ACS, stroke or PAOD, in particular are described. The invention also provides for compositions comprising a leukotriene synthesis inhibitor and a stating and methods of using these compositions to reduce C-reactive protein in a human subject at risk of MI, ACS, stroke and/or PAOD.
Patent MX-PA06009586-A (MX)
Title: Infusion and/or withdrawal fitting for biomedical fluid circuits.
Inventor: LODI MARCO
IPC: A61M39/20
Filed: 2004-02-23
Abstract: An infusion and/or withdrawal fitting for biomedical fluid circuits is defined by a tubular conduit (2) having a first end (7) connectable to a biomedical fluid circuit, and a second end (6) which is closed by a plug (9) having a collar (14) connected to the plug (9) at a weakened portion (18); the conduit (2) having a breaking member (21) for breaking the weakened portion (18) when fitting the plug (9) to the conduit (2), and for retaining the collar (14) on the conduit (2).
Patent MX-PA06010799-A (MX)
Title: Papermaker's triple layer forming fabric with non-uniform top cmd floats.
Inventor: BARRATTE CHRISTINE
IPC: D21F1/00
Filed: 2006-09-21
Abstract: A papermaker's fabric includes: a set of top machine direction yarns; a set of top cross machine direction yarns interwoven with the top machine direction yarns to form a top fabric layer; a set of bottom machine direction yarns; a set of bottom cross machine direction yarns interwoven with the bottom machine direction yarns to form a bottom fabric layer; and a plurality of stitching yarns interwoven with the top and bottom fabric layers. The yarns are interwoven as a series of repeat units. In each of the repeat units, each top cross machine direction yarn forms multiple paper side floats, and at least a first of the paper side floats passes over a first number of top machine direction yarns, and at least a second of the paper side floats passes over a second number of top machine direction yarns that differs from the first number by one.
Patent MX-PA06015043-A (MX)
Title: Adhesive for the junction of low surface energy surfaces, manufactured from ethylene vinyl and acrylic polymers containing tackifying resins.
Inventor: ARELLANO RAUL MALDONADO
IPC: C09J123/08
Filed: 2006-12-19
Abstract: The present disclosure describes an adhesive for the junction of polyolefin, polystyrene and polyurethane surfaces based on ethylene vinyl and acrylic polymer aqueous emulsions, containing tackifying resins and further additives such as chloroprene. The compounds combination allows a high instantaneous adhesion to be obtained (up to 112 grams per centimetre), as well as a high adhesion acquired over time (up to 446 grams per centimetre). The adhesive is maintained stable in an emulsion form at a temperature of from about 0°C to about 110°C, having a pH of from about 6.0 to about 8.0. Due to the composition, the adhesive may be used with surface energies under 15 dynes per centimetre and located onto a single surface over which the adhesion is to be promoted. The use of a tackifying resin allows an adhesion of up to 40 oz to be developed in 15 minutes, at a temperature of from about 20°C to about 35°C. The inventive adhesive may be located onto one of the surfaces to be attached using an engraving roller system or a commercial pressure or air spraying system.
Patent MY-101673-A (MY)
Title: Dispensing container made from an eva laminate
Inventor: DAVID L CARROLL
IPC: B32B15/12
Filed: 1987-09-30
Abstract: THERE IS DISCLOSED A SUBSTRATE OF LAYERS OF MATERIALS COMPRISING ETHYLENE VINYL ALCOHOL COPOLYMER LAYERS HAVING SANDWICHED THEREIN BETWEEN A METAL FOIL LAYER AND A PAPER LAYER ALL SUITABLE ADHERED TO ONE ANOTHER. IT IS ALSO CONTEMPLATED THAT THE SUBSTRATE BE EMPLOYED IN FABRICATING A DENTIFRICE TUBE.(FIG. 2)
Patent MY-101777-A (MY)
Title: Multiprocessor sharep pipeline cache memory.
Inventor: THOMAS F JOYCE
IPC: G11C7/00
Filed: 1987-09-30
Abstract: A CACHE MEMORY UNIT IS CONSTRUCTED TO HAVE A TWO-STAGE PIPELINE SHAREABLE BY A PLURALITY OF SOURCES WHICH INCLUDE TWO INDEPENDENTLY OPERATED CENTRAL PROCESSING UNITS (CPUs). APPARATUS INCLUDED WITHIN THE CACHE MEMORY UNIT OPERATES TO ALLOCATE ALTERNATE TIME SLOTS TO THE TWO CPUs WHICH OFFSET THEIR OPERATIONS BY A PIPELINE STAGE. THIS PERMITS ONE PIPELINE STAGE OF THE CACHE MEMORY UNIT TO PERFORM A DIRECTORY SEARCH FOR ONE CPU WHILE THE OTHER PIPELINE STAGE PERFORMS A DATA BUFFER READ FOR THE OTHER CPU. EACH CPU IS PROGRAMMED TO USE LESS THAN ALL OF THE TIME SLOTS ALLOCATED TO IT. THUS, THE PROCESSING UNITS OPERATE CONFLICT-FREE WHILE PIPELINE STAGES ARE FREED UP FOR PROCESSING REQUESTS FROM OTHER SOURCES, SUCH AS REPLACEMENT DATA FROM MAIN MEMORY OR CACHE UPDATES.(FIG. 2)
Patent MY-102585-A (MY)
Title: N-cyanoisothioureas and use thereof in pest control
Inventor: DR HANSPETER FISCHER
IPC: A01N47/30
Filed: 1988-02-22
Abstract: USE OF A COMPOUND OF FORMULA HEREIN A IS AN AROMATIC-HETEROCYCLIC RING WHICH CONTAINS OXYGEN OR NITROGEN ATOM, AND N IS 1 OR 2, FOR CONTROLLING INSECTS AND PLANT-DESTRUCTIVE NEMATODES AND TO A COMPOSITION CONTAINING SUCH A COMPOUND. THE COMPOUNDS OF THIS INVENTION ARE PARTICULARLY SUITABLE FOR CONTROLLING SUCKING INSECTS.
Patent MY-104103-A (MY)
Title: Quaternary ammonium or phosphonium peroxy carbonic acid precursors and their use in detergent bleach compositions
Inventor: ROBERT WILLIAM RILEY HUMPREYS
IPC: C11D3/395
Filed: 1988-03-16
Abstract: A BLEACH PRECURSOR COMPOUND, ITS PEROXYGEN ACID DERIVATIVE, AND DETERGENT COMPOSITIONS CONTAINING THESE MATERIALS ARE DISCLOSED HEREIN. THE BLEACH PRECURSOR STRUCTURALLY COMPRISES A QUATERNIZED AMMONIUM OR PHOSPHONIUM GROUP LINKED TO A CARBONATE MOIETY HAVING A LEAVING GROUP. UPON PERHYDROLYSIS IN THE PRESENCE OF HYDROGEN PEROXIDE AND A BASIC AQUEOUS MEDIUM, THERE IS GENERATED A PEROXYCARBONIC ACID BLEACH.
Patent MY-104663-A (MY)
Title: Lead-replaceable writing implement with multiple lead channels.
Inventor: CHUN-LIANG KUO
IPC: B43K21/16
Filed: 1989-06-23
Abstract: A LEAD-REPLACEABLE WRITING IMPLEMENT INCLUDING AN OUTER TUBE (20), AN INNER ROD (10) RECEIVED IN THE OUTER TUBE (20) AND FORMED WITH MULTIPLE LEAD CHANNELS (11) AND A PUSH ROD (14), A ROTARY TUBE (40)PARTIALLY INSERTED INTO A LOWER END OF THE OUTER TUBE (20), AND A LEAD HOLDER (30) RECEIVED IN THE ROTARY TUBE (40) AND PARTIALLY PROTRUDED BEYOND THE LOWER END THEREOF, WHEREIN THE MULTIPLE LEAD CHANNELS (11) RESPECTIVELY CONTAIN SEVERAL SERIES OF LEADS (50) OF DIFFERENT HARDNESS, AND THE ROTARY TUBE (40) TO LOCATE THE LEAD STOP RIGHT ABOVE A LEAD CHANNEL (11) AND THEN PUSH THE INNER ROD (10) UPWARD, THE LEAD STOP WILL STOP A LOWEST LEAD WITH DESIRED HARDNESS FROM RISING AND DROP THE STOPPED LEAD INTO THE LEAD HOLDER, AND WHEN THEREAFTER PRESSING THE INNER ROD (10) DOWNWARD, THE PUSH ROD (14)THEREOF WILL PARTIALLY PROTRUDE THE DROPPED LEAD BEYOND THE LEAD HOLDER (30) FOR WRITING. (FIG. 1)
Patent MY-105877-A (MY)
Title: Acidic liquid fabric softener with yellow color that changes to blue upon dilution.
Inventor: TIMOTHY WOODROW COFFINDAFFER
IPC: D06M13/322
Filed: 1989-10-16
Abstract: LIQUID FABRIC SOFTENING COMPOSITIONS FOR USE IN A RINSE BATH AFTER WASHING WITH A DETERGENT. THE SOFTENING COMPOSITIONS HAVE A pH OF FROM ABOUT 2 TO ABOUT 6 AND CONTAIN CERTAIN SPECIFIC YELLOW/BLUE COLORANTS AT LEVELS WHICH PROVIDE A YELLOW COLOR IN THE COMPOSITION AND WHEN SAID COMPOSITIONS ARE DILUTED IN THE RINSE WATER OF A TYPICAL LAUNDRY PROCESS, THEY HAVE A pH MORE THAN ABOUT 7.5 AND A DESIRABLE BLUE COLOR.
Patent MY-107380-A (MY)
Title: Foldable structures.
Inventor: DAVID CHARLES DYER
IPC: A47B43/00
Filed: 1990-05-02
Abstract: A FOLDABLE STRUCTURE WHICH CAN BE USED AS THE BASIS FOR A WIDE VARIETY OF ARTICLES, SUCH AS FURNITURE, OFFICE EQUIPMENT, FREIGHT CONTAINERS AND PORTABLE BUILDINGS, IS FOLDABLE BETWEEN A GENERALLY FLAT FORM AND AN ERECTED, THREE-DIMENSIONAL FORM. A FIRST PAIR OF OPPOSED FRAME UNITS (10, 11) ARE CONNECTED BY AT LEAST ONE FURTHER FRAME UNIT (12), WHICH IS HINGEDLY ATTACHED TO ONE (11) OF THE PAIR OF FRAME UNITS AND IS HINGEDLY AND SLIDABLY TO THE OTHER (10) OF THE PAIR OF FRAME UNITS, FOR EXAMPLE BY MEANS OF SWIVEL CLEATS (13). FURTHER COMPONENTS ARE CONNECTED TO ONE OR BOTH OF THE PAIR OF FRAME UNITS (10, 11) SO THAT SUCH FURTHER COMPONENTS CAN BE DISPOSED IN A FOLDED-FLAT POSITION ADJACENT TO SAID PAIR OF FRAME UNITS (10, 11) WHEN THE LATTER ARE IN THEIR COLLAPSED STATE AND CAN BE DISPOSEDIN A SECOND, READY-FOR-USE POSITION IN PLANES AT AN ANGLE TO THE PLANES CONTAINING THE FRAME UNITS TO WHICH THEY ARE ATTACHED.(FIG. 1A) (FIG. 1B)
Patent MY-108002-A (MY)
Title: Containerization system.
Inventor: GOUGE SAMUEL T
IPC: C05G5/27
Filed: 1992-04-02
Abstract: THE PRESENT INVENTION RELATES TO A CONTAINERIZATION SYSTEM COMPRISING AT LEAST ONE INNER WATER SOLUBLE (WATER DISPERSIBLE) BAG LOCATED WITHIN AN OUTER WATER SOLUBLE (WATER DISPERSIBLE) BAG. EACH WATER SOLUBLE BAG INDEPENDENTLY CONTAINS AN AGROCHEMICAL THAT DOES NOT SUBSTANTIALLY DISSOLVE THE BAG, OR BAGS, WHICH IT CONTACTS. TYPICAL AGROCHEMICALS ARE IN SOLID, SUBTANTIALLY NON-AQUEOUS LIQUID, OR ORGANIC GEL FORM. TYPICAL AGROCHEMICALS INCLUDE PLANT PROJECTING COMPOUNDS SUCH AS PESTICIDES, FUNGICIDES, INSECTICIDES, NEMATOCIDES, HERBICIDES, PLANT NUTRIENTS OR PLANT GROWTH REGULATORS. (FIG. 1)
Patent MY-110614-A (MY)
Title: Absorbent article having tucked flaps
Inventor: BRUCE WILLIAM LAVASH
IPC: A61F13/472
Filed: 1993-06-29
Abstract: A ABSORBENT ARTICLE SUCH AS A SANITARY NAPKIN (20), HAVING A FLAPS (24) AND A RECESSED AREA (68) WHEREIN THE FLAPS (24) MAY BE TUCKED. (FIG. 1)
Patent MY-108790-A (MY)
Title: Method for apparatus for performing a hand-off in a wireless communication system
Inventor: PATSIOKAS STELIOS JOHN
IPC: H04W56/00
Filed: 1993-08-02
Abstract: A METHOD IN A DIGITAL WIRELESS COMMUNICATION SYSTEM (100) CONTROLS AN INTER-CELL HAND-OFF. FIRST AND SECOND FIXED UNITS (102) RECEIVE A COMMON SYNCHRONIZATION SIGNAL FROM A CONTROLLER (104), AND A FIRST WIRELESS LINK IS ESTABLISHED BETWEEN THE FIRST FIXED UNIT AND A PORTABLE UNIT (120) ON A FIRST FREQUENCY. THE FIRST WIRELESS LINK IS SYNCHRONIZED TO THE COMMON SYNCHRONIZATION SIGNAL, AND FRAME SYNCHRONIZATION IS OBTAINED BETWEEN THE FIXED UNIT (102) AND THE PORTABLE UNIT (120) DURING ESTABLISHMENT OF THE FIRST WIRELESS LINK. FRAME SYNCHRONIZATION IS MAINTAINED ONLY BY MAINTAINING BIT SYNCHRONIZATION WHILE TRANSMITTING USER DATA ON THE FIRST FREQUENCY. A SECOND WIRELESS LINK IS ESTABLISHED BETWEEN THE SECOND FIXED UNIT (102) AND THE PORTABLE UNIT (120) ON THE FIRST FREQUENCY IF THE FIRST FREQUENCY IS USABLE THEREBETWEEN. THE SECOND WIRELESS LINK IS SYNCHRONIZED TO THE COMMON SYNCHRONIZATION SIGNAL. THE FIRST WIRELESS LINK IS DISCONNECTED AFTER THE SECOND WIRELESS LINK IS ESTABLISHED, THEREBY SEAMLESSLY COMPLETING THE INTER-CELL HAND-OFF. (FIG .5)