公开(公告)号：US20130016678A1

公开(公告)日：2013-01-17

申请号：US13619460

申请日：2012-09-14

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04W72/04

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US20110235747A1

公开(公告)日：2011-09-29

申请号：US13158215

申请日：2011-06-10

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04L27/00

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US07924699B2

公开(公告)日：2011-04-12

申请号：US12759630

申请日：2010-04-13

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04B7/216

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US07787826B2

公开(公告)日：2010-08-31

申请号：US11486809

申请日：2006-07-14

申请人： Sathyadev Venkata Uppala ,  Murari Srinivasan ,  Pablo Anigstein ,  Rakesh Dugad ,  Rajiv Laroia ,  Junyi Li

发明人： Sathyadev Venkata Uppala ,  Murari Srinivasan ,  Pablo Anigstein ,  Rakesh Dugad ,  Rajiv Laroia ,  Junyi Li

IPC分类号： H04B17/00

CPC分类号： H04W52/0216 ,  Y02D70/00

摘要： Systems and methodologies are described that facilitate transitioning between states associated with a wireless terminal. The wireless terminal may transition to and/or from a split-tone on state, which may enable increasing overall user capacity related to a base station or sector. Further, such state transitions may reduce power consumption associated with the wireless terminal.

摘要翻译： 描述了促进与无线终端相关联的状态之间的转换的系统和方法。 无线终端可以转换到和/或从分离音开启状态，这可以实现与基站或扇区相关的整体用户容量的增加。 此外，这种状态转换可以减少与无线终端相关联的功耗。

公开(公告)号：US20100195484A1

公开(公告)日：2010-08-05

申请号：US12759639

申请日：2010-04-13

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04L27/28

CPC分类号： H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

摘要： A method for reducing the peak-to-average ratio in an OFDM communication signal is provided. The method includes defining a constellation having a plurality of symbols, defining a symbol duration for the OFDM communication signal, and defining a plurality of time instants in the symbol duration. A plurality of tones are allocated to a particular communication device, and a discrete signal is constructed in the time domain by mapping symbols from the constellation to the time instants. A continuous signal is generated by applying an interpolation function to the discrete signal such that the continuous signal only includes sinusoids having frequencies which are equal to the allocated tones.

公开(公告)号：US20080013490A1

公开(公告)日：2008-01-17

申请号：US11487053

申请日：2006-07-14

申请人： Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q7/00

CPC分类号： H04W72/042 ,  H04W8/26

摘要： Methods and apparatus related to assignment in a wireless communications system are described. A mobile is assigned an identifier and a mask value, e.g., as part of a state transition message. The mobile uses the assigned identifier and/or the assigned mask value in determining whether assignments included in assignment messages, e.g., traffic channel assignment messages, are directed to the wireless terminal. Predetermined associations between assignment slots, assigned segments, and/or mask values are utilized to limit control signaling overhead. Different groups of segments are available for assignment to different wireless terminals as a function of mask values. Different types of assignment messages use different amounts of information bits to convey the assignment. Some types of assignments use a wireless terminal identifier, while other types of assignments use a wireless terminal identifier and a mask identifier. The mask identifier, e.g., a single bit, allows for selection between a subset of the potential masks used in the system.

公开(公告)号：US06980540B1

公开(公告)日：2005-12-27

申请号：US09641636

申请日：2000-08-16

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J11/00 ,  H04L5/02 ,  H04W36/00 ,  H04Q7/38

CPC分类号： H04W72/0413 ,  H04L5/023

摘要： Uplink traffic channel allocation is realized by utilizing a dedicated control channel in which a prescribed portion of the control channel resource, for example, frequency, time slot or the like, is reserved for transporting the uplink traffic channel requests. Both the base station and the particular mobile unit know the prescribed portion of the control channel resource a priori. Consequently, when the particular mobile unit transmits an uplink traffic channel request via the prescribed portion of the control channel resource there is no need for adding any control header information, thereby minimizing overhead. Furthermore, the length of the uplink traffic channel requests can be optimally chosen without constraints imposed by other control message schemes. Reduced overhead coupled with the prescribed portion of the control channel resource arriving quite frequently reduces latency in the particular mobile unit acquiring an uplink traffic channel. In one example, delivery of adequate uplink traffic channel request information to the base station, while minimizing the adverse impact of losing requests, is ensured by persistently transmitting the requests. Specifically, after the mobile unit transmits a first request, it transmits a second or even a third request instead of waiting to receive a response message from the base station and/or waiting for a timer to time out. By the mobile unit using such a persistent request transmission scheme, the base station can readily determine the true value of the received request by eliminating the transmission loop delay effect, thereby allowing a sensible assignment decision to be made.

摘要翻译： 通过利用专用控制信道来实现上行业务信道分配，其中控制信道资源的规定部分，例如频率，时隙等被保留用于传送上行业务信道请求。 基站和特定移动单元都先验知道控制信道资源的规定部分。 因此，当特定移动单元经由控制信道资源的规定部分发送上行业务信道请求时，不需要添加任何控制报头信息，从而最小化开销。 此外，可以最佳地选择上行链路业务信道请求的长度，而不受其他控制消息方案施加的约束。 与控制信道资源的规定部分相关联的减少的开销相当频繁地减少了获取上行链路业务信道的特定移动单元中的等待时间。 在一个示例中，通过持续发送请求来确保向基站传送足够的上行链路业务信道请求信息，同时最小化丢失请求的不利影响。 具体地，在移动单元发送第一请求之后，它发送第二个或甚至第三个请求，而不是等待从基站接收响应消息和/或等待定时器超时。 通过使用这种持久请求传输方案的移动单元，基站可以通过消除传输环路延迟效应容易地确定接收到的请求的真实值，从而允许进行明智的分配决定。

公开(公告)号：US06934539B2

公开(公告)日：2005-08-23

申请号：US09756370

申请日：2001-01-08

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04J3/00 ,  H04W68/00 ,  H04M11/00

CPC分类号： H04W68/00

摘要： An unique arrangement including a so-called timing control order and timing control signals is employed to identify whether wireless terminals are reachable within a base station cell coverage area in a wireless communications system. To this end, detection of a particular wireless terminal being alive and well, and within the cell coverage area associated with a base station is effected by the base station transmitting a timing control order in a timing control time slot reserved for the particular wireless terminal. If the particular wireless terminal receives the timing control order, it transmits a prescribed timing control message at a prescribed time. If the base station does not receive the timing control message, it is an indication that communication with the particular wireless terminal has been lost.

摘要翻译： 使用包括所谓的定时控制顺序和定时控制信号的唯一布置来识别在无线通信系统中的基站小区覆盖区域内无线终端是否可达。 为此，基站在为特定无线终端保留的定时控制时隙中发送定时控制命令来实现对与基站相关联的小区覆盖区域中存在且良好并且在小区覆盖区域内的特定无线终端的检测。 如果特定无线终端接收到定时控制命令，则在规定的时间发送规定的定时控制消息。 如果基站没有接收到定时控制消息，则表示与特定无线终端的通信已经丢失。

公开(公告)号：US06807160B1

公开(公告)日：2004-10-19

申请号：US09596434

申请日：2000-06-19

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC分类号： H04Q720

CPC分类号： H04W72/1278

摘要： Access request transmissions are effected in a wireless communications system by assigning each mobile unit a unique dedicated uplink resource. Specifically, each mobile unit is assigned channel segments with distinct time slot indices and/or waveform indices, where waveforms with distinct indices are orthogonal. A base station can identify the mobile that has made an access request from the dedicated uplink resource. Therefore, no mobile identification number is needed in the uplink request message. Then, the base station can transmit a request response message on a shared downlink resource that may include the identification number of the requesting mobile unit to acknowledge reception of the request. The mobile unit may transmit on a shared uplink resource an acknowledgment of reception of the downlink request response message.

摘要翻译： 通过为每个移动单元分配唯一的专用上行链路资源，在无线通信系统中实现接入请求传输。 具体地，每个移动单元被分配具有不同时隙索引和/或波形索引的信道段，其中具有不同索引的波形是正交的。 基站可以从专用上行链路资源识别已经进行了访问请求的移动站。 因此，在上行链路请求消息中不需要移动识别号码。 然后，基站可以在可以包括请求移动单元的识别号码的共享下行链路资源上发送请求响应消息，以确认该请求的接收。 移动单元可以在共享上行链路资源上发送对下行链路请求响应消息的接收的确认。

公开(公告)号：US06553019B1

公开(公告)日：2003-04-22

申请号：US09472074

申请日：1999-12-23

申请人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Sundeep Rangan

发明人： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Sundeep Rangan

IPC分类号： H04J100

CPC分类号： H04L5/026 ,  H04B1/7136 ,  H04B1/7143 ,  H04L5/0007

摘要： Tone sequences in a frequency hopping arrangement are generated and assigned by advantageously employing a combination of a sequence generator and a sequence assignor to generate sequences and assign them on a time slot by time slot basis. In a transmitter, the sequence generator and sequence assignor, in combination with a user tone assignor are employed to generate and assign tone sequences to a user on a time slot by time slot basis. In a receiver, the sequence generator and sequence assignor, in combination with a user tone identifier are employed to generate sequences and to identify incoming tone sequences to a user on a time slot by time slot basis. Specifically, the sequence assignment in a time slot is such that a prescribed plurality of sequences is assigned to a particular user. This partitioning of the tasks facilitates the use of a sequence generator that generates sequences with the desirable properties of interference and frequency diversity and, which, leaves the task of properly assigning these sequences among one or more users to the sequence assignor. The sequence assignor functions in such a manner that the interference and frequency diversity properties for the one or more users are preserved, and this is further facilitated by assigning sequences in such a manner that they maximally overlap prior assigned sequences. In one embodiment of the invention, a Latin square based sequence is generated in accordance with a first prescribed process. In a second embodiment of the invention, a Latin cube based sequence is generated in accordance with a second prescribed process. In a third embodiment of the invention, a Latin hypercube of prescribed dimension based sequence is generated in accordance with a third prescribed process. In still another embodiment of the invention, the principles of the invention are employed to realize frequency band hopping.