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公开(公告)号：CA2309472A1
公开(公告)日：2001-11-25
申请号：CA2309472
申请日：2000-05-25
Applicant: MANTHA RAMESH , KSCHISCHANG FRANK , SNELGROVE WILLIAM MARTIN , FRAZER MARK JAMES , VAN HEESWYK FRANK M
Inventor： MANTHA RAMESH , KSCHISCHANG FRANK , SNELGROVE WILLIAM MARTIN , FRAZER MARK JAMES , VAN HEESWYK FRANK M
IPC: H04W4/18 , H04B1/707 , H04L1/00 , H04L1/18 , H04L12/56 , H04W48/08 , H04W88/02 , H04W88/08 , H04B1/69 , H04B7/204
Abstract: A data channel for transmitting data from a base station to subscriber stations is provided. Each subscriber station has a different service-class which reflects the receptio n- quality of the data transmitted from the base station. The data channel is organized into a plurality of frames. Each frame contains service-class information that is packaged in the frame in such a manner that all subscriber stations can recover the service-class information. The frame also includes payload data destined for at least one of the subscriber stations. The payload data is packaged in the frame in such a manner that the subscriber station having payload data destined therefore can recover it s payload data, regardless of its service class. Subscriber stations that have no payload data destined therefore, and/or which are in a poorer service-class than the destined subscriber-stations, can use the service-class information to determine that the remainder of the frame can be ignored. An apparatus, syst em and method relating to the data channel are also provided.
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公开(公告)号：CA2437927A1
公开(公告)日：2005-02-14
申请号：CA2437927
申请日：2003-08-14
Applicant: MANTHA RAMESH
Inventor： MANTHA RAMESH
Abstract: A method, system and apparatus for determining a block format to be used to transmit a block of data over a channel to a receiver by collecting a series of recepti on- quality measurements, determining the rate of change of the reception-quality or the rate at which retransmissions requests are being made, and, depending upon the magnitude o f the rate of change or the rate of retransmission requests, either: averaging the lowest portion of the reception-quality measurements during the time-series and determining the block format based upon the average; or determining the block format based upon the most recent reception-quality measurements.
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公开(公告)号：CA2308564A1
公开(公告)日：2001-11-15
申请号：CA2308564
申请日：2000-05-15
Applicant: SNELGROVE W MARTIN , MANTHA RAMESH , VAN HEESWYK FRANK M , FRAZER MARK J , KSCHISCHANG FRANK
Inventor： SNELGROVE W MARTIN , MANTHA RAMESH , VAN HEESWYK FRANK M , FRAZER MARK J , KSCHISCHANG FRANK
Abstract: A communication structure and method which allows connection-like and connectionless communications to be provided on a multiplexed link is provided. The structure and method can make efficient use of available transmission capacity and/or network resources while providing both types of communication and hybrids. Connection-like communications can be provided by a channel having allocated transmission capacity dedicated to the communication while connectionless communication can be provided by a shared channel through whi ch data can be transmitted to subscribers. In an embodiment, the shared channel transmits frames of packets addressed to one or more of the subscribers. The allocation of transmission capacity between the dedicated channels and the shared channel can be fixed, or can be managed to meet network or network operator requirements. The structure and method can also be managed by the network operator to permit prioritization of some communications over others. In another embodiment, two or more shared channels are provided.
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公开(公告)号：CA2361186A1
公开(公告)日：2003-05-02
申请号：CA2361186
申请日：2001-11-02
Applicant: MANTHA RAMESH , CASTURA JEFFREY P
Inventor： MANTHA RAMESH , CASTURA JEFFREY P
Abstract: The present invention provides a method and system for mitigating fading and/or poor reception at a receiver. The receiver includes an antenna diversity mechanism which can be operated in a variety of antenna configurations each of which can provide different reception characteristics. The receiver evaluates the reception quality of the radio signal with the antenna in a first configuration and with the antenna in at least a second configuration and selects the antenna configuration that has the best evaluated reception for use until a subsequent iteration, when the process is repeated. The antenna configurations can correspond to configurations wherein reception is favored in different directions or to configurations wherein different antennas are selected, each antenna being spaced from each other antenna. Th e method can also improve the reception of a signal transmitted by selecting an antenna configuration for transmissions which provides improved reception quality at the destination receiver.
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公开(公告)号：CA2354285A1
公开(公告)日：2003-01-27
申请号：CA2354285
申请日：2001-07-27
Applicant: CASTURA JEFFREY P , MANTHA RAMESH , VAN HEESWYK FRANK M
Inventor： CASTURA JEFFREY P , MANTHA RAMESH , VAN HEESWYK FRANK M
Abstract: A system for transmitting data between stations, such as base stations and subscriber stations in a wireless telecommunications system, employs variable offsets f or its interleaving operations. By using different offsets with the interleavers, data which wou ld otherwise be synchronously aligned when transmitted from a station to many stations, or from many stations to a station, will not be aligned after interleaving has been performed. This reduces the peak to average ratio required for a transmitter and/or can reduce interference experienced at receivers in the system. This is especially true if a significant proportion of the otherwise aligned signals are symbols which require zero energy to transmit.
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Patent Agency Ranking
公开(公告)号：CA2319287A1
公开(公告)日：2002-03-14
申请号：CA2319287
申请日：2000-09-14
Applicant: MANTHA RAMESH
Inventor： MANTHA RAMESH
Abstract: The present invention provides a novel system, method and apparatus for allocating power between at least two communication services that share a common power output limit. Two communication services particularly suited for the present invention are voice services and data services transmitted on the downlink of a wireless network. An embodiment of the method includes determining the actual consumption of power on the voice channels of the wireless network during a given time period, and allocating substantially th e same amount of power to the voice channels for the next time period, thus allowing for the allocation of the remaining amount of power to the data services, and thereby allowing, for example, increased modulation of the data services and thereby improve overall rates of data transfer and/or reliability of data transmission.
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公开(公告)号：CA2421578A1
公开(公告)日：2004-09-10
申请号：CA2421578
申请日：2003-03-10
Applicant: MANTHA RAMESH , GAMSA BEN , GERKIS ANTHONY
Inventor： MANTHA RAMESH , GAMSA BEN , GERKIS ANTHONY
Abstract: A method and system for selecting and reselecting an antenna direction for a n antenna capable of transmitting signals in one of at least two selectable directions . The average received signal-to-interference ratio is used to initially select the antenna direction. Thereafter the average received signal-to-interference ratio is monitored and the antenna direction reselected when the average received signal-to-interference ratio rises too far below t he average received signal-to-interference ratio used to initially select the antenna direction for too long too often and if the antenna is not then required for a transmission that cannot be interrupted. If the average received signal-to-interference ratio drops significantly below the level us ed to initially select the antenna direction, then that level is reset downward. Reselection, if commenced, is repeated periodically until the antenna is required for transmission of a signal.
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8.发明专利
公开(公告)号：CA2323164A1
公开(公告)日：2002-04-11
申请号：CA2323164
申请日：2000-10-11
Applicant: MANTHA RAMESH
Inventor： MANTHA RAMESH
Abstract: An apparatus, system and method for improving the SNR of a desired sign al received at a receiver in a multiple access communication system is disclose d. The apparatus, system and method subtracts known or knowable signals from the total signal received at the receiver and the desired signal is them determined from the result of the subtraction. The known, or knowable, signals can be synchronization signals or other interfering channel signals transmitted by the transmitter, such as a wireless network base station, serving the receiver, such as a subscriber station in such a wireless network, and/or ca n be such signals transmitted by another transmitter, such as an adjacent base station, or an adjacent sector in multi-sector systems.
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公开(公告)号：CA2313314A1
公开(公告)日：2001-12-30
申请号：CA2313314
申请日：2000-06-30
Applicant: VAN HEESWYK FRANK , MANTHA RAMESH , SNELGROVE MARTIN
Inventor： VAN HEESWYK FRANK , MANTHA RAMESH , SNELGROVE MARTIN
Abstract: A user control channel for a wireless digital subscriber line systems and th e like, or other communications systems which can benefit from a control channel which provides a low data rate connection between stations on an ongoing basis, makes efficient use of transmission capacity in the communications systems, in one embodiment, the user control channel h as a structure employing slotted frames, and a user can be assigned multiple slots, a singl e slot or less than a single slot (sharing slots with other users) to meet the data transmission needs of the user. Also, one or more slots can be designated as random access slots which users can access via an Aloha- like or other random access protocol as needed.
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公开(公告)号：CA2310188A1
公开(公告)日：2001-11-30
申请号：CA2310188
申请日：2000-05-30
Applicant: VAN HEESWYK FRANK , MANTHA RAMESH , FRAZER MARK J , KSCHISCHANG FRANK , SNELGROVE W MARTIN
Inventor： VAN HEESWYK FRANK , MANTHA RAMESH , FRAZER MARK J , KSCHISCHANG FRANK , SNELGROVE W MARTIN
IPC: H04H20/00 , H04L12/803 , H04L12/851 , H04L27/34 , H04W72/04 , H04W84/00 , H04L12/66 , H04M11/06
Abstract: A communication structure and method which allows connection-like and connectionless communications to be provided on a multiplexed link is provided. The structure and method can make efficient use of available transmission capacity and/or network resources while providing for both types of communication. Connection-like communications ca n be provided by a channel having allocated bandwidth dedicated to the communication while connectionless communication can be provided by a shared channel through which data can be transmitted to subscribers. In an embodiment, the shared channel transmits frames of packet s addressed to one or more of the subscribers. The frames can have a robustly packaged header that can be received by all subscriber stations serviced by the base station while payload data in the frame can be packaged with a level of robustness appropriate for the intended subscriber station. Differe nt packagings can include different encoding and/or modulation of the payload data. The allocation of bandwidth between the dedicated channels and the broadcast channel can be fixed, or can be managed to meet network or network operator requirements. The structure and method can also be managed by the network operator to permit prioritization of some communications over others. In another embodiment, two or more shared channels are provided. In another embodiment, dedicated channels can be created with different amounts of bandwidth and/or can employ modulation and/or encoding selected according to the reception-quality of the recipient subscriber station.
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