公开(公告)号：US20060171307A1

公开(公告)日：2006-08-03

申请号：US11046489

申请日：2005-01-28

申请人： Nandu Gopalakrishnan ,  Niranjan Joshi ,  Srinivas Kadaba ,  Ashok Rudrapatna ,  Ganapathy Sundaram

发明人： Nandu Gopalakrishnan ,  Niranjan Joshi ,  Srinivas Kadaba ,  Ashok Rudrapatna ,  Ganapathy Sundaram

IPC分类号： H04L12/26 ,  H04Q7/00

CPC分类号： H04L1/1812 ,  H04L1/0007 ,  H04L1/0009 ,  H04L1/1887 ,  H04L47/14 ,  H04L47/24 ,  H04L47/30 ,  H04W28/06 ,  H04W72/10

摘要： An apparatus and a method for managing resources for efficient packet data transmission. More specifically, there is provided a method for allocating transmission resources in a base station comprising determining a largest supportable packet size for a highest priority user, wherein the determination is based at least partially on the available modulation types, a total number of codes available for packet transmission, a total amount of available transmission power available for packet transmission, and frame durations supported by a base station.

摘要翻译： 一种用于管理有效分组数据传输的资源的装置和方法。 更具体地，提供了一种用于在基站中分配传输资源的方法，包括确定最高优先级用户的最大可支持分组大小，其中所述确定至少部分地基于可用的调制类型，可用于 分组传输，可用于分组传输的可用传输功率的总量以及由基站支持的帧持续时间。

公开(公告)号：US08730885B2

公开(公告)日：2014-05-20

申请号：US12931652

申请日：2011-02-07

申请人： Nandu Gopalakrishnan ,  Anil M. Rao ,  James Paul Seymour

发明人： Nandu Gopalakrishnan ,  Anil M. Rao ,  James Paul Seymour

IPC分类号： H04W72/12

CPC分类号： H04W28/06 ,  H04L1/1816 ,  H04L1/1887 ,  H04L65/1016 ,  H04L65/607 ,  H04L69/04 ,  H04W72/00

摘要： A method is provided a wireless system for reliably transmitting context information in robust header compression at low signal energies. More particularly, the methodology of the invention provides an elongated virtual Transmission Time Interval (Super TTI) for the first few (in particular, the first) non-compressed packet (that includes upper layer headers) of a packet stream transmitted using ROHC compression. Improved reception reliability for the uncompressed packet, in particular to decode the headers, results by application to the Super TTI of a combination of TTI Bundling techniques, RLC segmentation and association with multiple HARQ processes and use of enough HARQ rounds.

摘要翻译： 提供了一种用于在低信号能量下可靠地传送鲁棒报头压缩中的上下文信息的无线系统的方法。 更具体地，本发明的方法为使用ROHC压缩传输的分组流的前几个（特别是第一个）非压缩分组（包括上层报头）提供了一个细长的虚拟传输时间间隔（Super TTI）。 改进了未压缩分组的接收可靠性，特别是解码报头，通过应用于超级TTI的TTI捆绑技术，RLC分段和与多个HARQ进程的关联以及使用足够的HARQ轮次的结果的结果。

公开(公告)号：US07385954B2

公开(公告)日：2008-06-10

申请号：US10619420

申请日：2003-07-16

申请人： Nandu Gopalakrishnan ,  Ganapathy Subramanian Sundaram

发明人： Nandu Gopalakrishnan ,  Ganapathy Subramanian Sundaram

IPC分类号： H04B7/216

CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04L5/0005 ,  H04L5/006 ,  H04L5/0064 ,  H04L27/3488

摘要： A method of transmitting or retransmitting a packet in a communication system. The method includes determining a modulation and coding scheme (MCS) to reduce the packet error rate (PER) for transmission, where the MCS is an aggregate of M redundant packet transmissions as a function of at least one of determined past channel conditions and/or allocated resources, determinable current channel conditions and/or allocated resources, future statistical channel conditions and/or allocated resources, and/or a cost function; and transmitting the packets in the communication system according to the MCS.

摘要翻译： 一种在通信系统中发送或重传分组的方法。 该方法包括确定调制和编码方案（MCS）以减少用于传输的分组错误率（PER），其中MCS是作为确定的过去信道条件中的至少一个的M个冗余分组传输的聚合和/或 分配的资源，可确定的当前信道条件和/或分配的资源，未来的统计信道条件和/或分配的资源，和/或成本函数; 以及根据MCS发送通信系统中的分组。

公开(公告)号：US07009949B1

公开(公告)日：2006-03-07

申请号：US09716106

申请日：2000-11-17

申请人： Nandu Gopalakrishnan ,  Teck H. Hu ,  Farooq Ullah Khan ,  Achilles George Kogiantis ,  Pantelis Monogioudis ,  Ashwin Sampath

发明人： Nandu Gopalakrishnan ,  Teck H. Hu ,  Farooq Ullah Khan ,  Achilles George Kogiantis ,  Pantelis Monogioudis ,  Ashwin Sampath

IPC分类号： H04Q7/00

CPC分类号： H04L1/0027 ,  H04L1/0002 ,  H04L1/0025

摘要： A rate feedback and adaptation scheme or system uses a rate of rate feedback asymmetrical with the rate of data rate adaptation. In particular, the rate adaptation system provides a rate of rate feedback slower than the rate of rate adaptation. Thus, by allowing the base station to change the data rate more frequently than the individual wireless units reports the rate information, the rate adaptation system can provide improved flexibility and more efficient use of wireless resources while reducing the processing and transmission overhead required to report the rate information. For example, every 3 slots, a wireless unit can calculate and report a rate for the wireless unit to use on a shared channel to send data. The base station receives the rates from the wireless units seeking to send data over the shared channel and selects a wireless unit to use the shared channel. If the base station can adapt the data rate every slot, the base station can adapt the data rate in accordance with a rate reported by another wireless unit, thereby improving system performance. Because of the small slot duration (for example, 0.67 microseconds), the relatively reduced rate of reporting should not adversely effect system performance since it is highly unlikely that the achievable data rate will change over a period of a slot under most operating conditions.

摘要翻译： 速率反馈和适应方案或系统使用速率反馈速率与数据速率适配速率不对称。 特别地，速率适配系统提供比速率适应速率慢的速率反馈速率。 因此，通过允许基站比各个无线单元报告速率信息更频繁地改变数据速率，速率适配系统可以提供改进的灵活性和更有效地使用无线资源，同时减少报告所需的处理和传输开销 费率信息。 例如，每3个时隙，无线单元可以计算和报告无线单元在共享信道上使用的速率来发送数据。 基站从寻求通过共享信道发送数据的无线单元接收速率，并选择无线单元以使用共享信道。 如果基站能够适应每个时隙的数据速率，则基站可以根据另一无线单元报告的速率来调整数据速率，从而提高系统性能。 由于小时隙持续时间（例如，0.67微秒），相对较低的报告速率不应对系统性能产生不利影响，因为在大多数操作条件下，可实现的数据速率在一段时间内将不可能改变。

公开(公告)号：US07006464B1

公开(公告)日：2006-02-28

申请号：US09716105

申请日：2000-11-17

申请人： Nandu Gopalakrishnan ,  Teck H. Hu ,  Farooq Ullah Khan ,  Achilles George Kogiantis ,  Pantelis Monogioudis ,  Ashwin Sampath

发明人： Nandu Gopalakrishnan ,  Teck H. Hu ,  Farooq Ullah Khan ,  Achilles George Kogiantis ,  Pantelis Monogioudis ,  Ashwin Sampath

IPC分类号： H04Q7/00

CPC分类号： H04W52/58 ,  H04B7/2643 ,  H04W52/262 ,  H04W52/60

摘要： An uplink and downlink channel structure supports a shared downlink data channel. The new structure accommodates advanced physical and Medium Access Control (MAC) layer techniques, such as incremental redundancy (IR), fast adaptation to channel conditions, and multiple input multiple output (MIMO) antenna configuration. The proposed changes are intended to lead to a downlink structure that achieves higher spectral efficiency for the packet oriented services over then shared downlink channel. Additionally, the new structure uses the base station transmit power information and of the channelization (OVSF) code space more efficiently.

摘要翻译： 上行链路和下行链路信道结构支持共享下行链路数据信道。 新结构适应先进的物理和媒体访问控制（MAC）层技术，例如增量冗余（IR），快速适应信道条件和多输入多输出（MIMO）天线配置。 所提出的改变旨在导致在随后的共享下行链路信道上为面向分组的服务实现更高频谱效率的下行链路结构。 此外，新结构更有效地使用基站发射功率信息和信道化（OVSF）码空间。

公开(公告)号：US20050182994A1

公开(公告)日：2005-08-18

申请号：US10778765

申请日：2004-02-13

申请人： Alexei Ashikhmin ,  Adriaan Van Wijngaarden ,  Nandu Gopalakrishnan ,  Jaehyeong Kim ,  Emina Soljanin

发明人： Alexei Ashikhmin ,  Adriaan Van Wijngaarden ,  Nandu Gopalakrishnan ,  Jaehyeong Kim ,  Emina Soljanin

IPC分类号： H03M13/47 ,  H04L1/16 ,  H04L1/18 ,  H04L1/20

CPC分类号： H04L1/1819 ,  H04L1/1845 ,  H04L1/20

摘要： A method is provided to accurately predict the probability of successfully recovering frames of (coded) information received over a wireless link, without having to decode the frame. This method, which consists of three steps, requires only limited information about the received signals and the forward error correction code and retransmission scheme being used. First, the signal to noise ratio (SNR) of each of the received signals is measured, where the average SNR is determined for multiple segments that together constitute the frame. Next, an algorithm is employed that takes these SNR values as inputs and determines the so-called effective SNR. The algorithm translates the measured SNR values using an appropriate convex metric, and subsequently combines the resulting values, thereby factoring in the effects of fading, multi-path, and other signal degradations. In the third stage, the effective SNR is used to determine the frame error rate by using a look-up table of a single reference curve that specifies the frame error rate of the actual error control code over an additive white Gaussian noise channel. This suffices to accurately predict the performance of a wide range of mobile communication channels. This method can be applied to a variety of retransmission strategies, including hybrid automatic-repeat request (ARQ) and incremental redundancy (IR) and combinations of these two strategies.

摘要翻译： 提供了一种方法来准确地预测成功地恢复通过无线链路接收的（编码）信息的帧的概率，而不必对帧进行解码。 该方法由三个步骤组成，仅需要关于接收到的信号以及所使用的前向纠错码和重传方案的有限信息。 首先，测量每个接收信号的信噪比（SNR），其中对于一起构成帧的多个段确定平均SNR。 接下来，采用将这些SNR值作为输入并且确定所谓的有效SNR的算法。 该算法使用适当的凸度量翻译所测量的SNR值，并且随后组合所得到的值，从而考虑到衰落，多路径和其他信号劣化的影响。 在第三阶段中，通过使用单个参考曲线的查找表来确定帧错误率来确定有效SNR，该参考曲线通过加性高斯白噪声信道指定实际错误控制码的帧错误率。 这足以准确地预测各种移动通信信道的性能。 该方法可以应用于各种重传策略，包括混合自动重传请求（ARQ）和增量冗余（IR）以及这两种策略的组合。

公开(公告)号：US20050013303A1

公开(公告)日：2005-01-20

申请号：US10619420

申请日：2003-07-16

申请人： Nandu Gopalakrishnan ,  Ganapathy Sundaram

发明人： Nandu Gopalakrishnan ,  Ganapathy Sundaram

IPC分类号： H04J3/16 ,  H04L1/00 ,  H04L1/18 ,  H04L12/56

CPC分类号： H04L1/0009 ,  H04L1/0003 ,  H04L1/1816 ,  H04L1/1819 ,  H04L1/1845 ,  H04L5/0005 ,  H04L5/006 ,  H04L5/0064 ,  H04L27/3488

摘要： A method of transmitting or retransmitting a packet in a communication system. The method includes determining a modulation and coding scheme (MCS) to reduce the packet error rate (PER) for transmission, where the MCS is an aggregate of M redundant packet transmissions as a function of at least one of determined past channel conditions and/or allocated resources, determinable current channel conditions and/or allocated resources, future statistical channel conditions and/or allocated resources, and/or a cost function; and transmitting the packets in the communication system according to the MCS.

摘要翻译： 一种在通信系统中发送或重传分组的方法。 该方法包括确定调制和编码方案（MCS）以减少用于传输的分组错误率（PER），其中MCS是作为确定的过去信道条件中的至少一个的M个冗余分组传输的聚合和/或 分配的资源，可确定的当前信道条件和/或分配的资源，未来的统计信道条件和/或分配的资源，和/或成本函数; 以及根据MCS发送通信系统中的分组。