公开(公告)号：US20090262641A1

公开(公告)日：2009-10-22

申请号：US12429911

申请日：2009-04-24

Applicant: RAJIV LAROIA ,  JUNYI LI ,  SATHYADEV VENKATA UPPALA

Inventor： RAJIV LAROIA ,  JUNYI LI ,  SATHYADEV VENKATA UPPALA

IPC: H04J11/00

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：US20090010351A1

公开(公告)日：2009-01-08

申请号：US12171155

申请日：2008-07-10

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: 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：US20080014969A1

公开(公告)日：2008-01-17

申请号：US11487118

申请日：2006-07-14

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q7/20 ,  H04J11/00

CPC classification number: H04W68/025 ,  H04W68/00 ,  H04W68/02 ,  Y02D70/00

Abstract: Techniques for paging terminals in a wireless (e.g., OFDMA) communication system to achieve both fast paging response and low power consumption for the terminals are described. A terminal receives paging indicator from a base station. If the paging indicator indicates that the terminal is potentially being paged, then the terminal receives at least one paging message from a paging channel. The terminal determines whether any one of the at least one paging message is for the terminal e.g., based on identification information included in each paging message. If a paging message indicates that the terminal is paged, then the terminal sends an acknowledgement for the paging message. The base station may estimate the timing of the terminal based on the acknowledgement and may send timing adjustment to the terminal. The terminal may adjust its timing based on the timing adjustment and may be able to quickly access the system with no contention.

Abstract translation: 描述了在无线（例如，OFDMA）通信系统中的寻呼终端的技术，以实现终端的快速寻呼响应和低功耗。 终端从基站接收寻呼指示符。 如果寻呼指示符指示终端可能被寻呼，则终端从寻呼信道接收至少一个寻呼消息。 终端基于每个寻呼消息中包含的识别信息来确定至少一个寻呼消息中的任何一个是否针对终端。 如果寻呼消息指示终端被寻呼，则终端发送寻呼消息的确认。 基站可以基于确认来估计终端的定时，并且可以向终端发送定时调整。 终端可以基于定时调整来调整其定时，并且可以能够在没有争用的情况下快速地访问系统。

公开(公告)号：US20080014951A1

公开(公告)日：2008-01-17

申请号：US11486810

申请日：2006-07-14

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

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

IPC: H04Q7/20

CPC classification number: H04W72/042 ,  H04W74/04

Abstract: Methods and apparatus of efficient communication of resource allocation are described. A base station transmits a resource assignment message, e.g., a state transition message, to a wireless terminal including a first part, e.g., a base station assigned wireless terminal On state identifier, identifying a resource being assigned and a second part, e.g., an ON state mask, identifying a portion of the resource allocated to the wireless terminal. The same resource allocation message information also communicates one of a plurality of different modes of commanded On state operation. The resource allocation message structure supports flexible allocation of available resources facilitating a resource to be partitioned differently at different times accommodating current needs. A predetermined recurring channel structure and association of segments with particular mask bits, facilitates allocated control segments to be used unambiguously without the need to include an overhead wireless terminal identifier field with the control report bits being communicated.

Abstract translation: 描述资源分配高效通信的方法和装置。 基站将资源分配消息（例如，状态转换消息）发送到包括第一部分的无线终端，例如基站分配的无线终端开状态标识符，识别被分配的资源和第二部分，例如， ON状态掩码，识别分配给无线终端的资源的一部分。 相同的资源分配消息信息还传送多个不同模式的命令开状态操作中的一个。 资源分配消息结构支持可用资源的灵活分配，便于在适应当前需求的不同时刻对不同的分区进行分区。 预定的重复频道结构和段与特定屏蔽位的关联有助于分配的控制段被明确使用，而不需要包括传送控制报告位的开销无线终端标识符字段。

公开(公告)号：US20070243879A1

公开(公告)日：2007-10-18

申请号：US11486547

申请日：2006-07-14

Applicant: Vincent D. Park ,  M. Scott Corson ,  Murari Srinivasan ,  Arnab Das ,  Pablo Anigstein ,  Junyi Li ,  Alan William O'Neill ,  Vladimir Parizhisky ,  Sathyadev Venkata Uppala ,  Matthew Impett

Inventor： Vincent D. Park ,  M. Scott Corson ,  Murari Srinivasan ,  Arnab Das ,  Pablo Anigstein ,  Junyi Li ,  Alan William O'Neill ,  Vladimir Parizhisky ,  Sathyadev Venkata Uppala ,  Matthew Impett

IPC: H04Q7/20

CPC classification number: H04L41/0816 ,  H04L41/0806 ,  H04L41/0893 ,  H04L41/5019 ,  H04L41/5022 ,  H04L41/509 ,  H04L41/5093 ,  H04L47/10 ,  H04L47/14 ,  H04L47/20 ,  H04L47/2441 ,  H04L47/2483 ,  H04W28/14 ,  H04W28/18 ,  H04W72/12

Abstract: An access node, e.g., base station, determines a configuration of an end node, e.g., wireless terminal, intended to support a specific traffic flow and sends a configuration command to the wireless terminal. A base station may determine one or more parameters associated with classification, queue management, scheduling, and/or automatic repeat request, and then send a configuration command to the wireless terminal instructing it to implement a configuration operation. In some embodiments, a wireless terminal sets the value of an internal parameter to a value directly provided by the base station in a configuration command. In some embodiments, a wireless terminal determines and sets the value of an internal parameter as a function of information included in the configuration command from the base station.

Abstract translation: 接入节点（例如，基站）确定旨在支持特定业务流的终端节点（例如，无线终端）的配置，并向无线终端发送配置命令。 基站可以确定与分类，队列管理，调度和/或自动重复请求相关联的一个或多个参数，然后向无线终端发送指令其实施配置操作的配置命令。 在一些实施例中，无线终端在配置命令中将内部参数的值设置为由基站直接提供的值。 在一些实施例中，无线终端根据来自基站的配置命令中包括的信息确定并设置内部参数的值。

公开(公告)号：US07016690B2

公开(公告)日：2006-03-21

申请号：US10640961

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: 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.

公开(公告)号：US06954481B1

公开(公告)日：2005-10-11

申请号：US09551791

申请日：2000-04-18

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04J11/00 ,  H04B1/7143 ,  H04B1/7156 ,  H04B1/76 ,  H04B7/26 ,  H04L5/02 ,  H04L27/26 ,  H04B1/713

CPC classification number: H04B1/7143 ,  H04B1/7156 ,  H04B2001/71563 ,  H04L5/0019 ,  H04L5/0048 ,  H04L25/0226 ,  H04L27/2613

Abstract: Base station identification and downlink synchronization are realized by employing pilots including known symbols transmitted at prescribed frequency tones in individual ones of prescribed time intervals. Specifically, the symbols used in the pilots are uniquely located in a time-frequency grid, where the locations are specified by periodic pilot tone hopping sequences. In a specific embodiment of the invention, a period of a pilot tone hopping sequence is constructed by starting with a Latin-square based hopping sequence, truncating it over time, and possibly offsetting and permuting it over frequency. Particular examples of pilot tone hopping sequences are parallel slope hopping sequences in which the periodicity of the sequences is chosen to be a prime number of symbol time intervals. In another embodiment of the invention, a notion of phantom pilots is employed to facilitate use of various system parameters while accommodating the above noted pilot tone hopping sequences.

Abstract translation: 基站识别和下行同步通过采用包括以规定时间间隔的各个规定频率发送的已知符号的导频来实现。 具体地，在导频中使用的符号唯一地位于时间 - 频率网格中，其中，位置由周期性导频音跳频序列指定。 在本发明的具体实施例中，通过以拉丁方为基础的跳频序列开始构建导频音跳频序列的周期，并且随着时间的推移将其截断，并可能通过频率进行偏移和置换。 导频音跳频序列的具体示例是平行斜率跳频序列，其中序列的周期性被选择为码元时间间隔的素数。 在本发明的另一个实施例中，使用幻像导频的概念来促进各种系统参数的使用，同时容纳上述导频音跳频序列。

公开(公告)号：US06816736B2

公开(公告)日：2004-11-09

申请号：US09756066

申请日：2001-01-08

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04Q720

CPC classification number: H04W68/02 ,  H04W52/0216 ,  H04W52/0219 ,  Y02D70/10

Abstract: In a unique paging time slot format, each of the allocated paging time slots occurs periodically and is split into several prescribed paging time slots including at least one first type paging time slot having a relatively short duration and at least one second type paging time slot having a longer duration. The at least one first type paging time slots is of relatively short duration and transports an indication whether a particular associated wireless terminal was paged. The second type paging time slot is of longer duration than the first type time slot and transports the entire paging message. Specifically, a wireless terminal that is normally in a standby mode only has to enter a monitor mode, i.e., “wake up”, to monitor the relatively short first type paging time slot to determine whether it has been paged. If it has been paged, the wireless terminal then monitors the longer second type paging time slot to determine if it is transporting a valid paging message for the paged wireless terminal. If no valid paged indication is detected in the first type paging time slot or no valid paging message is detected in the second type paging time slot, the wireless terminal returns to the standby mode, i.e., returns to a “sleep” state, and waits for the next periodic occurrence of its assigned paging time slot.

Abstract translation: 在唯一的寻呼时隙格式中，所分配的寻呼时隙中的每一个周期性地发生并被分成若干指定的寻呼时隙，包括具有相对较短持续时间的至少一个第一类型的寻呼时隙和至少一个第二类型的寻呼时隙， 持续时间较长 所述至少一个第一类型的寻呼时隙具有相对较短的持续时间并且传送指示特定相关联的无线终端是否被寻呼。 第二类寻呼时隙的持续时间比第一类型时隙长，传输整个寻呼消息。 具体来说，通常处于待机模式的无线终端仅需要进入监视模式即“唤醒”，以监视相对较短的第一类型的寻呼时隙，以确定是否已经被寻呼。 如果已经被寻呼，则无线终端然后监视较长的第二类型寻呼时隙以确定其是否正在传送用于被寻呼的无线终端的有效寻呼消息。 如果在第一类型寻呼时隙中没有检测到有效的分页指示，或者在第二类型寻呼时隙中没有检测到有效的寻呼消息，则无线终端返回到待机模式，即返回到“睡眠”状态，并等待 用于下一次定期发生其分配的寻呼时隙。

公开(公告)号：US06788963B2

公开(公告)日：2004-09-07

申请号：US10324194

申请日：2002-12-20

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04B138

CPC classification number: H04W72/048 ,  H04W16/12 ,  H04W16/14 ,  H04W24/00 ,  H04W36/06 ,  H04W36/20 ,  H04W52/0235 ,  H04W52/08 ,  H04W52/281 ,  H04W52/283 ,  H04W52/286 ,  H04W52/287 ,  H04W52/288 ,  H04W52/60 ,  H04W56/00 ,  H04W68/02 ,  H04W68/025 ,  H04W72/00 ,  Y02D70/23

Abstract: The use of multiple states of mobile communication device operation to allow a single base station to support a relatively large number of mobile nodes is described. The various states require different amounts of communications resources, e.g., bandwidth. Four supported states of operation are a on-state, a hold-state, a sleep-state, and an access-state. Each mobile node in the on-state is allocated communication resources to perform transmission power control signaling, transmission timing control signaling and to transmit data as part of a data uplink communications operation. Each mobile node in the hold-state is allocated communication resources to perform transmission timing control signaling and is provided a dedicated uplink for requesting a state transition and a shared resource for transmitting acknowledgements. In the sleep state a mobile node is allocated minimal resources and does not conduct power control signaling or timing control signaling. Data may be received in the on and hold states.

Abstract translation: 描述了使用移动通信设备操作的多种状态来允许单个基站支持相对大量的移动节点。 各种状态需要不同数量的通信资源，例如带宽。 四个支持的操作状态是开状态，保持状态，睡眠状态和访问状态。 处于导通状态的每个移动节点被分配通信资源以执行传输功率控制信令，传输定时控制信令，并且作为数据上行链路通信操作的一部分来发送数据。 在保持状态下的每个移动节点被分配通信资源以执行传输定时控制信令，并且提供用于请求状态转换的专用上行链路和用于发送确认的共享资源。 在睡眠状态下，移动节点被分配最少资源，并且不进行功率控制信令或定时控制信令。 可以在接通和保持状态下接收数据。

公开(公告)号：US06748566B1

公开(公告)日：2004-06-08

申请号：US09620797

申请日：2000-07-21

Applicant: Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

Inventor： Rajiv Laroia ,  Junyi Li ,  Sathyadev Venkata Uppala

IPC: H04L118

CPC classification number: H04L1/0061 ,  H04L1/004

Abstract: In a multiple access communications system data to be transmitted to a particular end-user receiver is processed with a specific process assigned to the particular end-user. The processing is such that an output array of data bits after processing has the same number of bits as an input array of data bits but is unique to the particular end-user. Then, the data is only recoverable at the end-user receiver by using a process that is the exact inverse of the process employed at the transmitter and assigned to the particular end-user receiver. Consequently, the data is identified to the particular end-user without having to transmit additional identification information.

Abstract translation: 在多址通信系统中，要发送到特定终端用户接收机的数据被处理为分配给特定最终用户的特定进程。 处理使得处理之后的数据位的输出阵列具有与数据位的输入阵列相同的位数，但是对于特定最终用户是唯一的。 然后，数据只能在最终用户接收机处通过使用在发射机处采用并被分配给特定最终用户接收机的过程的确切逆向的过程来恢复。 因此，数据被识别到特定的最终用户，而不必传输附加的标识信息。