-
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.
-
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.
-
公开(公告)号：WO03055254A3
公开(公告)日：2003-09-12
申请号：PCT/CA0201928
申请日：2002-12-13
Applicant: SOMA NETWORKS INC , MANTHA RAMESH , CASTURA JEFFREY P
Inventor： MANTHA RAMESH , CASTURA JEFFREY P
CPC classification number: H04W74/02
Abstract: A novel communication channel structure and method in a wireless communication system is provided. In an embodiment of the invention, the communication system includes a base station and a plurality of subscriber stations and the subscriber stations are given access to a variety of channels, including at least one uplink data channel. The uplink data channel can operate in at least a random access mode and a polled access mode. The base station informs each subscriber station it serves of the current mode of the uplink channel via an associated downlink signaling channel and, in random access mode, each subscriber station is able to randomly access the shared uplink channel. In polled mode, each subscriber station waits for permission from the base station before sending data over the shared uplink channel. A method of operating the system monitors the collisions which occur on the uplink channel in random mode and/or the amount of data and/or the data's priority level and/or QoS requirements and switches the system between random and polled modes as appropriate. In polled mode, the method determines which subscriber stations should access the uplink and when.
Abstract translation: 提供了一种无线通信系统中的新型通信信道结构和方法。 在本发明的一个实施例中，通信系统包括一个基站和多个用户站，并且用户站可以接入包括至少一个上行链路数据信道的各种信道。 上行链路数据信道可以至少以随机访问模式和轮询访问模式操作。 基站通过相关联的下行链路信令信道向每个用户站通知它服务的上行链路信道的当前模式，并且在随机接入模式下，每个用户站能够随机接入共享上行链路信道。 在轮询模式下，每个用户站在通过共享上行链路信道发送数据之前等待来自基站的许可。 操作系统的方法监视在随机模式中在上行链路信道上发生的冲突和/或数据量和/或数据的优先级和/或QoS要求，并且在适当的时候在随机模式和轮询模式之间切换系统。 在轮询模式下，该方法确定哪些用户站应该访问上行链路以及何时。
-
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.
-
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.
-
Patent Agency Ranking
公开(公告)号：WO2005017640A3
公开(公告)日：2005-06-02
申请号：PCT/CA2004001459
申请日：2004-08-12
Applicant: SOMA NETWORKS INC , MANTHA RAMESH
Inventor： MANTHA RAMESH
CPC classification number: H04L1/20 , H04L1/0003 , H04L1/0009 , H04L1/0019 , H04L1/0026
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 reception-quality measurements, determining the rate of change of the reception-quality or the rate at which retransmission requests are being made, and, depending upon the magnitude of 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.
Abstract translation: 一种方法，系统和设备，用于通过收集一系列接收质量测量结果来确定要用于在信道上向接收机发送数据块的块格式，确定接收质量的变化率或在 其中正在进行重发请求，并且根据改变速率的大小或重发请求的速率，或者：在时间序列期间平均接收质量测量的最低部分，并基于 平均; 或者基于最近的接收质量测量来确定块格式。
-
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.
-
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.
-
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.
-
10.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.
-
-
-
-
-
-
-
-
-
Search Results
18
records
(took 0.022 seconds)
