公开(公告)号：US07787826B2

公开(公告)日：2010-08-31

申请号：US11486809

申请日：2006-07-14

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

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

IPC: H04B17/00

CPC classification number: H04W52/0216 ,  Y02D70/00

Abstract: 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.

Abstract translation: 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

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04J11/00 ,  H04L27/28

CPC classification number: H04L5/0007 ,  H04L5/023 ,  H04L27/2602 ,  H04L27/2614 ,  H04L27/2636

Abstract: 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：US20090161655A1

公开(公告)日：2009-06-25

申请号：US12340441

申请日：2008-12-19

Applicant: Sathyadev Venkata Uppala

Inventor： Sathyadev Venkata Uppala

IPC: H04J3/06

CPC classification number: H04W56/00 ,  H04J3/0682 ,  H04J3/0697

Abstract: An apparatus and method for sample synchronization comprising receiving a return link (RL) timestamp from a radio frequency front end (RFFE); receiving a system time second from a navigation and timing system; generating a forward link (FL) timestamp based on the RL timestamp and the system time second; and including the FL timestamp and the system time second in a time data. In one aspect, the apparatus and method is used for RF control comprising storing gain information and gating control information in a memory; and performing one or more of the following: sending a first desired timestamp and the gain information to a radio frequency front end (RFFE); sending a second desired timestamp and a txEnable command to a transmit gating control; or sending a third desired timestamp and a rxEnable command to a receive gating control.

Abstract translation: 一种用于采样同步的装置和方法，包括从射频前端（RFFE）接收返回链路（RL）时间戳; 从导航和定时系统接收系统时间秒; 基于RL时间戳和系统时间秒来生成前向链路（FL）时间戳; 并且在时间数据中包括FL时间戳和系统时间秒。 一方面，该装置和方法用于RF控制，包括将增益信息和选通控制信息存储在存储器中; 以及执行以下的一个或多个：向射频前端（RFFE）发送第一所需时间戳和所述增益信息; 向发送选通控制发送第二期望时间戳和txEnable命令; 或者向接收门控控制发送第三期望时间戳和rxEnable命令。

公开(公告)号：US07392056B2

公开(公告)日：2008-06-24

申请号：US11327791

申请日：2006-01-06

Applicant: M. Scott Corson ,  Rajiv Laroia ,  Vincent Park ,  Sathyadev Venkata Uppala ,  Michaela Vanderveen

Inventor： M. Scott Corson ,  Rajiv Laroia ,  Vincent Park ,  Sathyadev Venkata Uppala ,  Michaela Vanderveen

IPC: H04Q7/20

CPC classification number: H04W68/00 ,  H04L63/126 ,  H04W12/10 ,  H04W12/12 ,  H04W28/24 ,  H04W60/00 ,  H04W72/04

Abstract: Location update techniques are described. A dormant mobile node updates its location information by sending a first message over a wireless link to an access node. The access node generates a second update message in response to the first message. The second message includes a mobile node identifier and, in some embodiments is directed to the mobile node. The second message is received by a tracking agent, which updates location information corresponding to the mobile node. In the case where second message is an IP message and is routed to the mobile node using Mobile IP, a Mobile IP home agent routes the second message to the mobile node's last point of network attachment where the tracking agent is located and intercepts the message. The tracking agent may send a response message to the access node sending the second message.

Abstract translation: 描述位置更新技术。 休眠移动节点通过无线链路向接入节点发送第一消息来更新其位置信息。 接入节点响应于第一消息生成第二更新消息。 第二消息包括移动节点标识符，并且在一些实施例中指向移动节点。 第二消息由跟踪代理接收，跟踪代理更新对应于移动节点的位置信息。 在第二消息是IP消息并且使用移动IP路由到移动节点的情况下，移动IP归属代理将第二消息路由到移动节点的最后一个网络附着点，跟踪代理所在的位置并拦截该消息。 跟踪代理可以向发送第二消息的接入节点发送响应消息。

公开(公告)号：US20080013490A1

公开(公告)日：2008-01-17

申请号：US11487053

申请日：2006-07-14

Applicant: Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Vladimir Parizhisky ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q7/00

CPC classification number: H04W72/042 ,  H04W8/26

Abstract: 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：US07069000B1

公开(公告)日：2006-06-27

申请号：US10640960

申请日：2003-08-13

Applicant: M. Scott Corson ,  Rajiv Laroia ,  Vincent Park ,  Sathyadev Venkata Uppala ,  Michaela Vanderveen

Inventor： M. Scott Corson ,  Rajiv Laroia ,  Vincent Park ,  Sathyadev Venkata Uppala ,  Michaela Vanderveen

IPC: H04M1/66

CPC classification number: H04L63/08 ,  H04L63/12 ,  H04L63/1408 ,  H04W12/06 ,  H04W12/10 ,  H04W12/12

Abstract: Signal, e.g., message, security techniques are described for wireless systems. A first signal is received by an access node via a wireless link. The signal includes a first authenticator that was generated by the transmitting device, e.g., wireless terminal. The access node determines from an attribute of the signal at least some information known to both the access node and transmitting device but which was not transmitted as part of the message content. The determined information was used by the wireless terminal in generating the first authenticator. The access node sends at least a portion of the first signal including the first authenticator and the determined information to another entity. The entity compares the first authenticator to a second authenticator it generates from the determined information and a secure key which it shares with the transmitting device to determine if the first and second authenticators match.

Abstract translation: 为无线系统描述信号，例如消息，安全技术。 接入节点经由无线链路接收第一信号。 信号包括由发送设备例如无线终端产生的第一认证器。 接入节点根据信号的属性确定接入节点和发送设备都已知的至少一些信息，但是未作为消息内容的一部分发送。 确定的信息被无线终端用于生成第一认证器。 接入节点将包括第一认证器的第一信号的至少一部分和确定的信息发送到另一个实体。 实体将第一鉴别器与其确定的信息产生的第二认证器和与发送设备共享的安全密钥进行比较，以确定第一和第二认证符是否匹配。

公开(公告)号：US06980540B1

公开(公告)日：2005-12-27

申请号：US09641636

申请日：2000-08-16

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

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

CPC classification number: H04W72/0413 ,  H04L5/023

Abstract: 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.

Abstract translation: 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

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

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

CPC classification number: H04W68/00

Abstract: 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.

Abstract translation: 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

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q720

CPC classification number: H04W72/1278

Abstract: 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.

Abstract translation: 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

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Sundeep Rangan

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala ,  Sundeep Rangan

IPC: H04J100

CPC classification number: H04L5/026 ,  H04B1/7136 ,  H04B1/7143 ,  H04L5/0007

Abstract: 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.