专利快速检索-快速检索全球专利，免费商用专利数据库-IPRDB

1. 发明授权

US6108374A System and method for measuring channel quality information 失效
标题翻译：用于测量信道质量信息的系统和方法
公开(公告)号：US6108374A
公开(公告)日：2000-08-22
申请号：US921454
申请日：1997-08-25
申请人： Krishna Balachandran , Sanjiv Nanda , Srinivas R. Kadaba , Richard P. Ejzak
发明人： Krishna Balachandran , Sanjiv Nanda , Srinivas R. Kadaba , Richard P. Ejzak
IPC分类号： H04L27/00 , H03M13/23 , H04B7/26 , H04B17/00 , H04L1/00 , H04L1/12 , H04L1/20 , H04L27/18 , H04L27/34 , H04W36/30 , H04W72/08 , H04B3/46 , H04Q1/20
CPC分类号： H04L1/006 , H04L1/0009 , H04L1/0015 , H04L1/0026 , H04L1/0054 , H04L1/20 , H04L1/12 , H04W36/30 , H04W72/08
摘要： A system and method to measure channel quality in terms of signal to noise ratio for the transmission of coded signals over fading channels. A Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes and at different mobile speeds. The filtered metric is mapped to the signal to noise ratio per symbol using a threshold based scheme. Use of this implicit signal to noise ratio estimate is used for the mobile assisted handoff and data rate adaptation in the transmitter.
摘要翻译：一种用于在衰落信道上传输编码信号的信噪比测量信道质量的系统和方法。用于最大似然路径的维特比解码度量用作信道质量度量。过滤欧几里德距离度量以平滑短期变化。滤波或平均度量是可靠的信道质量度量，其在不同的编码调制方案和不同的移动速度下保持一致。使用基于阈值的方案将经滤波的度量映射到每个符号的信噪比。使用这种隐式信噪比估计用于发射机中的移动辅助切换和数据速率适配。

2. 发明授权

US06625133B1 System and method for link and media access control layer transaction initiation procedures 有权
标题翻译：链接和媒体访问控制层事务发起程序的系统和方法
公开(公告)号：US06625133B1
公开(公告)日：2003-09-23
申请号：US09283312
申请日：1999-03-31
申请人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky , William Waung
发明人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky , William Waung
IPC分类号： H04Q738
CPC分类号： H04L29/06 , H04L1/0003 , H04L1/0025 , H04L1/1819 , H04L69/32 , H04L69/324
摘要： A system and method of implementing a radio link protocol and dynamic partial echo management for a transaction oriented packet data communication system. A data backlog is described with a media access control layer controller and transmitting a BEGIN protocol data unit transmitted to a receiver. A media access control layer transaction is initiated in response to the transmitting of the BEGIN frame.
摘要翻译：一种为面向事务的分组数据通信系统实现无线电链路协议和动态部分回声管理的系统和方法。用媒体访问控制层控制器描述数据积压，并发送传输到接收器的BEGIN协议数据单元。响应于BEGIN帧的发送，发起媒体访问控制层事务。

3. 发明授权

US06215827B1 System and method for measuring channel quality information in a communication system 失效
标题翻译：用于测量通信系统中信道质量信息的系统和方法
公开(公告)号：US06215827B1
公开(公告)日：2001-04-10
申请号：US09044636
申请日：1998-03-19
申请人： Krishna Balachandran , Sanjiv Nanda , Srinivas R. Kadaba , Richard P. Ejzak
发明人： Krishna Balachandran , Sanjiv Nanda , Srinivas R. Kadaba , Richard P. Ejzak
IPC分类号： H04L2302
CPC分类号： H04L1/0015 , H04L1/0003 , H04L1/0009 , H04L1/0026 , H04L1/0054 , H04L1/006 , H04L1/12 , H04L1/20 , H04W36/30 , H04W72/08
摘要： A system and method to measure channel quality in terms of signal to interference plus noise ratio for the transmission of coded signals over fading channels in a communication system. A Viterbi decoder metric for the Maximum Likelihood path is used as a channel quality measure for coherent and non-coherent transmission schemes. This Euclidean distance metric is filtered in order to smooth out short term variations. The filtered or averaged metric is a reliable channel quality measure which remains consistent across different coded modulation schemes speeds. The filtered metric is mapped to the signal to interference plus noise ratio per symbol using a threshold based scheme. Use of this implicit signal to interference plus noise ratio estimate is used for the mobile assisted handoff in a cellular system, power control and data rate adaptation in the transmitter.
摘要翻译：一种用于在通信系统中通过衰落信道传输编码信号的信噪比加噪声比来测量信道质量的系统和方法。用于最大似然路径的维特比解码器度量用作相干和非相干传输方案的信道质量测量。过滤欧几里德距离度量以平滑短期变化。滤波或平均的度量是可靠的信道质量度量，其在不同的编码调制方案速度下保持一致。使用基于阈值的方案将经滤波的度量映射到每个符号的信号与干扰加噪声比。使用这种隐含信号对干扰加噪声比估计用于蜂窝系统中的移动辅助切换，发射机中的功率控制和数据速率适配。

4. 发明授权

US06975611B1 Method and device for MAC layer feedback in a packet communication system 失效
标题翻译：分组通信系统中MAC层反馈的方法和设备
公开(公告)号：US06975611B1
公开(公告)日：2005-12-13
申请号：US09517907
申请日：2000-03-03
申请人： Krishna Balachandran , Subrahmanyam Dravida , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky
发明人： Krishna Balachandran , Subrahmanyam Dravida , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky
IPC分类号： H04B7/212 , H04B7/26
CPC分类号： H04B7/2612
摘要： A method and communication device for media access control feedback over a packet channel divided in channel time slots is provided. The channel time slots are divided into sub-channel time slots. A packet channel feedback field associated with each sub-channel time slot is defined. Acknowledgments are indicated using the packet channel feedback field. An active mobile identity associated with an active mobile station may be assigned which would then be included in the packet channel feedback field. A plurality of active mobile identities may be assigned and some of the active mobile identities may be reserved for special functions. The assigned active mobile identity is used, among other things, to identify an active mobile station to receive packet data signals. The active mobility identity is invalidated after one transaction of packet data signals or invalidated after a short number of such transactions. One or more of the assigned active mobile identities may be used to indicate a time slot assignment for the active mobile station. A sub-channel feedback field in the packet channel feedback field is used to indicate acknowledgments. A sub-channel assignment field in the packet channel feedback field is used to indicate time slot assignments. The sub-channel assignment field is substantially independent of the sub-channel feedback field.
摘要翻译：提供了一种用于通过以信道时隙划分的分组信道的媒体访问控制反馈的方法和通信设备。信道时隙被划分为子信道时隙。定义与每个子信道时隙相关联的分组信道反馈字段。使用分组信道反馈字段指示致谢。可以分配与活动移动台相关联的活动移动身份，然后将其包括在分组信道反馈字段中。可以分配多个活动移动身份，并且可以为特定功能保留一些活动移动身份。除了别的以外，使用所分配的活动移动身份以识别用于接收分组数据信号的活动移动台。主动移动身份在分组数据信号的一次交易之后无效，或者在短时间的这种交易之后无效。分配的活动移动身份中的一个或多个可以用于指示活动移动台的时隙分配。分组信道反馈字段中的子信道反馈字段用于指示确认。分组信道反馈字段中的子信道分配字段用于指示时隙分配。子信道分配字段基本上独立于子信道反馈字段。

5. 发明授权

US06895057B1 System and method for wireless communication supporting link adaptation and incremental redundancy 失效
标题翻译：支持链路自适应和增量冗余的无线通信系统和方法
公开(公告)号：US06895057B1
公开(公告)日：2005-05-17
申请号：US09431996
申请日：1999-11-02
申请人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
发明人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
IPC分类号： H04J3/16 , H04L1/00 , H04L1/18 , H04L5/16 , H04L27/00
CPC分类号： H04L1/0059 , H04L1/0003 , H04L1/0009 , H04L1/0061 , H04L1/0068 , H04L1/0072 , H04L1/1819 , H04L1/1867
摘要： A system and method is provided for communicating in a wireless communication system which supports link adaptation or link adaptation and incremental redundancy. The invention provides link adaptation at multiple code rate by dividing fixed length RLC blocks into coded sub-blocks. CRC code may be appended to the RLC blocks for error detection. The sub-blocks are then grouped into transmission units for transmission. The number of sub-blocks in each group is varied to provide multiple code rates. Headers are used to identify the transmission units being transmitted. In the case of retransmission, the transmission units may be expressly identified through extended headers. One or more of the originally transmitted sub-blocks are dropped and replaced by the extended headers in the retransmission. Accordingly, the present invention provides for a retransmission code rate which may be different from the code rate at which the transmission units were originally transmitted.
摘要翻译：提供了一种在支持链路适配或链路自适应和增量冗余的无线通信系统中进行通信的系统和方法。本发明通过将固定长度的RLC块划分成编码的子块来提供多码率的链路自适应。 CRC码可以附加到RLC块用于错误检测。然后将这些子块分组成传输单元进行传输。每个组中的子块的数量是变化的以提供多个代码率。标题用于识别正在发送的传输单元。在重传的情况下，可以通过扩展报头来明确地识别传输单元。原始传输的子块中的一个或多个被丢弃并被重传中的扩展头替换。因此，本发明提供了与发送单元最初发送的码率不同的重传码率。

6. 发明授权

US06778558B2 System and method for incremental redundancy transmission in a communication system 失效
标题翻译：通信系统中增量冗余传输的系统和方法
公开(公告)号：US06778558B2
公开(公告)日：2004-08-17
申请号：US09225910
申请日：1999-01-05
申请人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
发明人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
IPC分类号： H04J316
CPC分类号： H04L1/1671 , H04L1/0003 , H04L1/0025 , H04L1/0026 , H04L1/0059 , H04L1/0068 , H04L1/007 , H04L1/0071 , H04L1/0072 , H04L1/0083 , H04L1/08 , H04L1/1614 , H04L1/1816 , H04L1/1819
摘要： A system and method for incremental redundancy transmission in a communication system. A time slot is provided having at least one sub-slot with a fixed size, and a data block sized to fit in the sub-slot, a header having a one data block sequence number in the header for the time slot. A parity block is sized smaller than the data block such that the parity block and the data block sequence number fit within the sub-slot. The data block and parity block are transmitted in the sub-slot within the time slot. In the header for the time slot the number of data blocks and parity blocks transmitted are identified.
摘要翻译：一种用于通信系统中增量冗余传输的系统和方法。提供一个时隙，其具有至少一个具有固定大小的子时隙，以及数据块，其大小适合于子时隙，在该时隙的报头中具有一个数据块序列号的报头。奇偶校验块的大小小于数据块，使得奇偶校验块和数据块序列号适合在子时隙内。数据块和奇偶校验块在时隙内的子时隙中发送。在时隙的标题中，识别发送的数据块和奇偶校验块的数量。

7. 发明授权

US06611515B1 System and method for link and media access control layer transaction completion procedures 有权
标题翻译：链接和媒体访问控制层交易完成程序的系统和方法
公开(公告)号：US06611515B1
公开(公告)日：2003-08-26
申请号：US09286273
申请日：1999-04-05
申请人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky , William Waung
发明人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda , Shiv M. Seth , Stanley Vitebsky , William Waung
IPC分类号： H04G324
CPC分类号： H04L29/06 , H04L1/0003 , H04L1/0025 , H04L1/1819 , H04L69/32 , H04L69/324
摘要： A system and method of implementing a radio link protocol completion oriented packet data communication system. A data backlog is described with a media access control layer controller and transmitting a BEGIN protocol data unit containing a flag transmitted to a receiver. A media access control layer transaction is initiated in response to the transmitting of the BEGIN protocol data unit.
摘要翻译：一种实现无线电链路协议完成定向分组数据通信系统的系统和方法。用媒体访问控制层控制器描述数据积压，并发送包含发送到接收器的标志的BEGIN协议数据单元。响应于BEGIN协议数据单元的发送，发起媒体访问控制层事务。

8. 发明授权

US06557135B1 Cycling through entirety of error-indicating acknowledgment information 有权
标题翻译：循环整个错误指示确认信息
公开(公告)号：US06557135B1
公开(公告)日：2003-04-29
申请号：US09573017
申请日：2000-05-17
申请人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
发明人： Krishna Balachandran , Richard P. Ejzak , Sanjiv Nanda
IPC分类号： G08C2502
CPC分类号： H04L1/1671 , H04L1/1614 , H04L1/1809 , H04L1/1832
摘要： A system includes a generator component that determines a plurality of portions that comprise an entirety of error-indicating acknowledgement information. The system includes a generator component that cycles through the plurality of portions that comprise the entirety of the error-indicating acknowledgement information to send the error-indicating acknowledgement information.
摘要翻译：系统包括确定包括整个错误指示确认信息的多个部分的发生器组件。该系统包括一个发生器组件，循环通过包含整个错误指示确认信息的多个部分，以发送错误指示确认信息。

9. 发明授权

US07020185B1 Method and apparatus for determining channel conditions in a communication system 失效
标题翻译：用于确定通信系统中的信道状况的方法和装置
公开(公告)号：US07020185B1
公开(公告)日：2006-03-28
申请号：US09724231
申请日：2000-11-28
申请人： Krishna Balachandran , Sanjiv Nanda
发明人： Krishna Balachandran , Sanjiv Nanda
IPC分类号： H04B1/38
CPC分类号： H04W52/20 , H04B17/345
摘要： One example of symbol or bit error probability estimation in a communication system using soft decision information determines soft decision metric(s) for each symbol that is received over a communication channel and employs the soft decision metric(s) to obtain an estimate of symbol or bit error probability.
摘要翻译：使用软判决信息的通信系统中的符号或位错误概率估计的一个例子确定通过通信信道接收的每个符号的软判决度量，并采用软判决度量来获得符号或位错误概率。

10. 发明授权

US06990104B1 Methods and devices for scheduling transmissions in interference-limited networks 有权
标题翻译：用于在干扰受限网络中调度传输的方法和装置
公开(公告)号：US06990104B1
公开(公告)日：2006-01-24
申请号：US09632215
申请日：2000-08-03
申请人： Krishna Balachandran , Kirk K. Chang , Sanjiv Nanda
发明人： Krishna Balachandran , Kirk K. Chang , Sanjiv Nanda
IPC分类号： H04L12/28
CPC分类号： H04W72/1242 , H04L47/24 , H04L47/50 , H04L47/56 , H04L47/6225 , H04W24/06 , H04W72/1226
摘要： Uplinked and downlinked transmissions in an interference-limited system, such as a cellular network, are prioritized and authorized by channel quality/data rate to minimize interference.
摘要翻译：在诸如蜂窝网络的干扰受限系统中的上行链路和下行链路传输被优先化并且被信道质量/数据速率授权以最小化干扰。

你已经成功收藏专利！

检索式保存成功!

IPRDB

热门服务

关于我们

友情链接

联系方式