| Patent Number |
Title Of Patent |
Date Issued |
| 6801495 |
High capacity robust modem for multiple classes of services |
October 5, 2004 |
| A low-cost data communication system and method using modems to provide high speed multi-class services to subscribers is disclosed. In the present invention, an n-bit orthogonal modulating code is uniquely partitioned into several subsets whereas each subset is assigned to a particu |
| 6748171 |
Method and system for providing multiple classes of services in dense wavelength division multip |
June 8, 2004 |
| A system and method is disclosed for providing multiple classes of communication services on a high-speed, high capacity communication platform over Wave Division Multiplexing (WDM) networks. A predetermined set of light channels of a WDM network is partitioned into one or more sub g |
| 6744984 |
Method and system for alternative transmission traffic routing in dense wavelength division mult |
June 1, 2004 |
| A system and method is disclosed for providing high-speed, high capacity data communication over a Wave Division Multiplexing (WDM) network with an efficient re-routing capability. When all light channels between two nodes in the network are loaded with transmission jobs, a transmission |
| 6647059 |
Code division multiple access cable modem |
November 11, 2003 |
| A low-cost data communication system using modems is disclosed. In the proposed system and method, a binary incoming data stream is split into several parallel sub streams by an encoding modem. These parallel sub streams are mapped into a set of unique orthogonal short-codes and then |
| 6208615 |
Broadband wireless access based on code division parallel access |
March 27, 2001 |
| A number of user IDs are assigned to each wireless device. The number of user IDs required is based on the type of information transmitted (e.g., video, voice, or data). The user ID's generate the orthogonal Walsh codes used to cover a data signal to be transmitted. Each Walsh code is 2. |
| 6198719 |
Bi-orthogonal code division multiple access system |
March 6, 2001 |
| The present invention assigns a pair of user ID's to each user. The user ID's are used as addresses to access two orthogonal Walsh codes in a memory. Each Walsh code is 2.sup.n -bits in length and the memory size is 2.sup.n.times.2.sup.n. The orthogonal codes are then used to cover the |
| 6128497 |
High capacity cell planning based on fractional frequency reuse |
October 3, 2000 |
| The fractional frequency reuse plan groups available frequencies into 16 frequency groups. These frequency groups are then allocated to a group of sectors such that a four by four matrix results. The top two rows of the matrix are alternating odd numbered frequency groups while the botto |
| 6085093 |
Frequency transition process for capacity enhancement in a cellular network |
July 4, 2000 |
| The frequency transition process migrates frequency groups from one frequency reuse plan to another. In response to a change in capacity requirements, the process migrates each layer of the present frequency reuse plan to the layers of the new frequency reuse plan. |
| 5970411 |
N=4 directional frequency assignment in a cellular radio system |
October 19, 1999 |
| The process of the present invention is based on a tri-cellular, hexagonal platform where six, or a multiple of six, frequency groups are directionalized and reused in the same direction. Directional antennas are located in the center of each tri-cell group. Each antenna radiates into a |
| 5883889 |
Directional pseudonoise offset assignment in a CDMA cellular radiotelephone system |
March 16, 1999 |
| The present invention is based on a tri-cellular grouping of three identical cells. Each cell of the tri-cellular group is driven by a directional antenna that radiates the cell from the center of the group. Multiple tri-cellular groups make up a cellular system having three axes at |
| 5850608 |
Directional frequency assignment in a cellular radio system |
December 15, 1998 |
| The process of the present invention is based on a hexagonal cellular platform where six, or a multiple of six, frequency groups are directionalized and reused in the same direction. Directional antennas are located in the center of each cell. Each antenna radiates into a 60.degree. |
| 5815813 |
Multipath tolerant cellular communication system and method |
September 29, 1998 |
| A method for deploying a PCS system wherein radio transceivers are deployed at spacings which correspond to a diameter of a first Fresnel zone and set output powers of the transceivers to define cells which correspond to the first Fresnel zone of the transceivers. A PCS system having rad |
| 5802474 |
Directional frequency allocation in an N=6 cellular radio system |
September 1, 1998 |
| The process of the present invention is based on a tri-cellular platform where nine, or a multiple of nine, frequency groups are directionalized and reused in the same direction. Directional antennas are located in the center of the tri-cell group. Each antenna radiates into a 120.degree |
| 5734983 |
Frequency assignment in a cellular radio system |
March 31, 1998 |
| The N=4 frequency layout plan of the present invention is based on dividing up the available frequencies into 12 or a multiple of 12 frequency groups. These groups are then distributed evenly and alternately among four tri-cell groups. Each tri-cell group is comprised of three identical |
