公开(公告)号：US20110064043A1

公开(公告)日：2011-03-17

申请号：US12561711

申请日：2009-09-17

申请人： Kumar Balachandran ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

发明人： Kumar Balachandran ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

IPC分类号： H04W72/04

CPC分类号： H04L5/006 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0007 ,  H04L5/0037 ,  H04W4/06 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/046 ,  H04W88/06

摘要： Methods and apparatus for allocating time-frequency resources to mobile terminals in a wireless communications system in which time-frequency resources may be selectively used according to a first multiple-input multiple-output (MIMO) transmission scheme or a second MIMO transmission scheme that differs from the first MIMO transmission scheme. An exemplary method comprises, for at least a first scheduling instance, identifying a first group of mobile terminals corresponding to the first MIMO transmission scheme and a second group of mobile terminals corresponding to the second MIMO transmission scheme, allocating time-frequency resources in a first pre-determined time-frequency zone exclusively to mobile terminals belonging to the first group, and allocating time-frequency resources in one or more additional pre-determined time-frequency zones to one or more mobile terminals belonging to the second group. This method may be implemented in a base station of a WiMAX system, for example.

摘要翻译： 用于在无线通信系统中向移动终端分配时间频率资源的方法和装置，其中可以根据不同的第一多输入多输出（MIMO）传输方案或第二MIMO传输方案来选择性地使用时间频率资源 从第一MIMO传输方案。 一种示例性方法包括：对于至少第一调度实例，识别对应于第一MIMO传输方案的第一组移动终端和对应于第二MIMO传输方案的第二组移动终端， 预定的时频区域专用于属于第一组的移动终端，以及将属于第二组的一个或多个移动终端的一个或多个附加的预定时频区域中的时间频率资源分配。 例如，该方法可以在WiMAX系统的基站中实现。

公开(公告)号：US08649327B2

公开(公告)日：2014-02-11

申请号：US13223599

申请日：2011-09-01

申请人： Kumar Balachandran ,  Havish Koorapaty ,  Tripura Ramesh

发明人： Kumar Balachandran ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04W4/00

CPC分类号： H04W72/0446 ,  H04L1/08 ,  H04L1/1812 ,  H04L1/1825 ,  H04L1/1887 ,  H04W72/0406

摘要： A wireless telecommunications network supplies a semi-persistent resource that a wireless station can use for special purposes (such as a retransmission of packets for ARQ purposes or a control signal. The semi-persistent resource can be allocated by the system to other terminals if, e.g., a retransmission is not required. Since a retransmission is generally performed in response to a NACK received from a base station, the NACK may itself serve as a token that permits the wireless station to use the semi-persistent allocation. Thus, the technology includes, e.g., a method for resource allocation on a semi-persistent basis and efficient signaling for the usage of such allocation.

摘要翻译： 无线电信网络提供无线站可以用于特殊目的的半持久资源（例如用于ARQ目的的分组重传或控制信号），半持久资源可以由系统分配给其他终端， 例如，不需要重传，由于通常响应于从基站接收到的NACK来执行重传，所以NACK本身可以用作允许无线站使用半持久分配的令牌，因此，该技术 包括例如在半持久基础上的资源分配方法和用于这种分配的使用的有效信令。

公开(公告)号：US08750240B2

公开(公告)日：2014-06-10

申请号：US12561711

申请日：2009-09-17

申请人： Kumar Balachandran ,  Havish Koorapaty ,  Tripura Ramesh

发明人： Kumar Balachandran ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H04W4/00

CPC分类号： H04L5/006 ,  H04B7/0413 ,  H04B7/0669 ,  H04L5/0007 ,  H04L5/0037 ,  H04W4/06 ,  H04W72/0446 ,  H04W72/0453 ,  H04W72/046 ,  H04W88/06

摘要： Methods and apparatus for allocating time-frequency resources to mobile terminals in a wireless communications system in which time-frequency resources may be selectively used according to a first multiple-input multiple-output (MIMO) transmission scheme or a second MIMO transmission scheme that differs from the first MIMO transmission scheme. An exemplary method comprises, for at least a first scheduling instance, identifying a first group of mobile terminals corresponding to the first MIMO transmission scheme and a second group of mobile terminals corresponding to the second MIMO transmission scheme, allocating time-frequency resources in a first pre-determined time-frequency zone exclusively to mobile terminals belonging to the first group, and allocating time-frequency resources in one or more additional pre-determined time-frequency zones to one or more mobile terminals belonging to the second group. This method may be implemented in a base station of a WiMAX system, for example.

摘要翻译： 用于在无线通信系统中向移动终端分配时间频率资源的方法和装置，其中可以根据不同的第一多输入多输出（MIMO）传输方案或第二MIMO传输方案来选择性地使用时间频率资源 从第一MIMO传输方案。 一种示例性方法包括：对于至少第一调度实例，识别对应于第一MIMO传输方案的第一组移动终端和对应于第二MIMO传输方案的第二组移动终端， 预定的时频区域专用于属于第一组的移动终端，以及将属于第二组的一个或多个移动终端的一个或多个附加的预定时频区域中的时间频率资源分配。 例如，该方法可以在WiMAX系统的基站中实现。

公开(公告)号：US08726137B2

公开(公告)日：2014-05-13

申请号：US12696141

申请日：2010-01-29

申请人： Kumar Balachandran ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Tripura Ramesh

发明人： Kumar Balachandran ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh

IPC分类号： H03M13/03

CPC分类号： H03M13/235 ,  H03M13/2957 ,  H03M13/413 ,  H03M13/618 ,  H03M13/6356 ,  H03M13/6362 ,  H03M13/6544

摘要： A convolutional encoder (50) comprises an expurgation unit (22) and a first component convolutional encoder section (24). A convolutional turbo encoder (20) comprises an expurgation unit (22); a first component convolutional encoder section (24); a second component convolutional encoder section (26); and an interleaver (28). For both the convolutional encoder (50) and the expurgating convolutional turbo encoder (20) the expurgation unit (22) inserts predetermined values at selected bit positions of an input bit sequence and thereby provide an expurgated input bit sequence. A lower rate convolutional code is obtained from a higher rate code via expurgation.

摘要翻译： 卷积编码器（50）包括消除单元（22）和第一组件卷积编码器部分（24）。 卷积涡轮编码器（20）包括消除单元（22）; 第一组件卷积编码器部分（24）; 第二组件卷积编码器部分（26）; 和交织器（28）。 对于卷积编码器（50）和剥离卷积涡轮编码器（20），消除单元（22）在输入位序列的选定位位置处插入预定值，从而提供一个被消除的输入位序列。 较低速率的卷积码通过较高的速率代码获得。

公开(公告)号：US20100287453A1

公开(公告)日：2010-11-11

申请号：US12696141

申请日：2010-01-29

申请人： Kumar BALACHANDRAN ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

发明人： Kumar BALACHANDRAN ,  Tsao-Tsen Chen ,  Havish Koorapaty ,  Rajaram Ramesh ,  Tripura Ramesh

IPC分类号： H03M13/27 ,  G06F11/10

CPC分类号： H03M13/235 ,  H03M13/2957 ,  H03M13/413 ,  H03M13/618 ,  H03M13/6356 ,  H03M13/6362 ,  H03M13/6544

摘要： A convolutional encoder (50) comprises an expurgation unit (22) and a first component convolutional encoder section (24). A convolutional turbo encoder (20) comprises an expurgation unit (22); a first component convolutional encoder section (24); a second component convolutional encoder section (26); and an interleaver (28). For both the convolutional encoder (50) and the expurgating convolutional turbo encoder (20) the expurgation unit (22) inserts predetermined values at selected bit positions of an input bit sequence and thereby provide an expurgated input bit sequence. A lower rate convolutional code is obtained from a higher rate code via expurgation.

摘要翻译： 卷积编码器（50）包括消除单元（22）和第一组件卷积编码器部分（24）。 卷积涡轮编码器（20）包括消除单元（22）; 第一组件卷积编码器部分（24）; 第二组件卷积编码器部分（26）; 和交织器（28）。 对于卷积编码器（50）和剥离卷积涡轮编码器（20），消除单元（22）在输入位序列的选定位位置处插入预定值，从而提供一个被消除的输入位序列。 较低速率的卷积码通过较高的速率代码获得。

公开(公告)号：US08538464B2

公开(公告)日：2013-09-17

申请号：US12346286

申请日：2008-12-30

申请人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

发明人： Rajaram Ramesh ,  Havish Koorapaty ,  Kumar Balachandran

IPC分类号： H04W68/00

CPC分类号： H04W68/02 ,  H04W4/08 ,  H04W72/0466

摘要： Code words are assigned to subscriber stations or groups of subscriber stations in a communication network for a quick paging mechanism in which the assigned code words are transmitted as quick paging signals over unused frequency resources to signal the subscriber stations. Subsets of multiple code words from a set of code words can be assigned to respective paging groups, and overlapping subsets can be assigned to multiple paging groups. This enables a single code word to be used to address either a single paging group or multiple paging groups.

摘要翻译： 代码字被分配给通信网络中的订户站或用户站组，用于快速寻呼机制，其中分配的码字作为快速寻呼信号在未使用的频率资源上发送，以向用户台发信号。 可以将来自一组码字的多个码字的子集分配给各个寻呼组，并且可以将重叠的子集分配给多个寻呼组。 这使得能够使用单个代码字来寻址单个寻呼组或多个寻呼组。

公开(公告)号：US08144720B2

公开(公告)日：2012-03-27

申请号：US12429468

申请日：2009-04-24

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

IPC分类号： H04Q11/02

CPC分类号： H04L49/9094 ,  H04L1/0003 ,  H04L1/0009 ,  H04L5/0007 ,  H04L5/0042 ,  H04L5/0046 ,  H04L5/006 ,  H04L43/0894 ,  H04L43/16 ,  H04L47/70 ,  H04L47/74 ,  H04L47/781 ,  H04W28/065 ,  H04W28/22 ,  H04W72/044 ,  H04W72/048 ,  H04W72/12 ,  Y02D70/146

摘要： A base station in an OFDMA system which determines a modulation and coding scheme to use for a packet of a certain size to be transmitted by a Mobile Station. The base station schedules transmissions by mobile stations and transmits packets. The base station includes a processing unit which determines a number of time-frequency resources required to transmit the packet for a modulation and coding scheme, determines an SINR based on the number of time-frequency resources used and available power at the mobile station, determines a transmission rate as a ratio of the packet size transmitted to the number of time-frequency resources used, sets a rate to zero if the determined SINR is lower than a threshold SINR required for the modulation and coding scheme, and selects the modulation and coding scheme with a highest transmission rate. The base station includes a memory storing modulation and coding schemes.

摘要翻译： OFDMA系统中的基站，其确定用于要由移动站发送的一定大小的分组的调制和编码方案。 基站调度移动台的传输并发送分组。 基站包括：处理单元，其确定用于调制和编码方案发送分组所需的时间频率资源的数量;基于所使用的时间频率资源的数量和移动站的可用功率来确定SINR，确定 如果发送的分组大小与使用的时间 - 频率资源的数量的比率的传输速率，则如果确定的SINR低于调制和编码方案所需的阈值SINR，则将速率设置为零，并且选择调制和编码 传输速率最高的方案。 基站包括存储调制和编码方案的存储器。

公开(公告)号：US07796698B2

公开(公告)日：2010-09-14

申请号：US11757731

申请日：2007-06-04

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

IPC分类号： H04K1/10 ,  H04Q7/20

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L25/0228

摘要： A receiver uses knowledge of pilot symbols transmitted by a neighboring sector to reduce interference in a received data symbol. The received data symbol is transmitted on one or more data subcarriers in a first sector. Overlapping pilot symbols transmitted on overlapping pilot carriers in a second sector are determined and used to generate channel estimates for the overlapping pilot carriers. The overlapping pilot symbols and pilot channel estimates are then used to reduce interference in the received data symbol.

摘要翻译： 接收机使用由相邻扇区发送的导频符号的知识来减少接收的数据符号中的干扰。 所接收的数据符号在第一扇区中的一个或多个数据子载波上发送。 确定在第二扇区中的重叠导频载波上发送的重叠导频符号，并用于生成重叠导频载波的信道估计。 然后使用重叠导频符号和导频信道估计来减少接收到的数据符号中的干扰。

公开(公告)号：US20090092085A1

公开(公告)日：2009-04-09

申请号：US12138000

申请日：2008-06-12

申请人： Rajaram Ramesh ,  Kumar Balachandran ,  Havish Koorapaty

发明人： Rajaram Ramesh ,  Kumar Balachandran ,  Havish Koorapaty

IPC分类号： H04Q7/00

CPC分类号： H04L27/0008 ,  H04L1/0083 ,  H04L1/1607 ,  H04L5/0007 ,  H04L5/0091 ,  H04L25/0204

摘要： A radio access network (RAN) (20) comprise a base station (28) and a wireless terminal (30). The base station 28 comprises a transceiver (38) and a frame handler (40), the wireless terminal (30) comprises a transceiver (48) and a wireless terminal frame handler (50). The frame handlers (40, 50) handle a enhanced frame F having enhanced frame structure. At least a downlink portion of the frame is formatted and handled in a manner whereby the frame can be perceived as a first format type of frame if the wireless terminal is a first type of wireless terminal and perceived as an enhanced or second format type of frame if the wireless terminal is a second type of wireless terminal. The frame handler configures the frame as plural subframes, each subframe having a downlink burst followed by an uplink burst. The frame is preferably configured to afford the second type of wireless terminal sufficient time to develop an acknowledgement for a message transmitted in a downlink burst, the acknowledgement being sent to the base station in an uplink burst which is within one frame length of the message.

摘要翻译： 无线电接入网络（RAN）（20）包括基站（28）和无线终端（30）。 基站（28）包括收发器（38）和帧处理器（40），无线终端（30）包括收发器（48）和无线终端帧处理器（50）。 帧处理器（40,50）处理具有增强的帧结构的增强帧F. 帧的至少下行链路部分被格式化和处理，其中如果无线终端是第一类型的无线终端并且被感知为增强或第二格式类型的帧，则可以将帧感知为第一格式类型的帧 如果无线终端是第二类型的无线终端。 帧处理器将帧配置为多个子帧，每个子帧具有下行链路突发，随后是上行链路突发。 该帧优选地被配置为提供第二类型的无线终端足够的时间以对在下行链路突发中发送的消息进行确认，该确认在消息的一个帧长度内的上行链路突发中被发送到基站。

公开(公告)号：US20080298524A1

公开(公告)日：2008-12-04

申请号：US11757731

申请日：2007-06-04

申请人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

发明人： Havish Koorapaty ,  Rajaram Ramesh ,  Kumar Balachandran

IPC分类号： H04B1/10

CPC分类号： H04L27/2647 ,  H04L5/0048 ,  H04L25/0228

摘要： A receiver uses knowledge of pilot symbols transmitted by a neighboring sector to reduce interference in a received data symbol. The received data symbol is transmitted on one or more data subcarriers in a first sector. Overlapping pilot symbols transmitted on overlapping pilot carriers in a second sector are determined and used to generate channel estimates for the overlapping pilot carriers. The overlapping pilot symbols and pilot channel estimates are then used to reduce interference in the received data symbol.

摘要翻译： 接收机使用由相邻扇区发送的导频符号的知识来减少接收的数据符号中的干扰。 所接收的数据符号在第一扇区中的一个或多个数据子载波上发送。 确定在第二扇区中的重叠导频载波上发送的重叠导频符号，并用于生成重叠导频载波的信道估计。 然后使用重叠导频符号和导频信道估计来减少接收到的数据符号中的干扰。