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1. 发明授权

US09661519B2 Efficient reporting of information in a wireless communication system 有权
公开(公告)号：US09661519B2
公开(公告)日：2017-05-23
申请号：US11486601
申请日：2006-07-14
申请人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
发明人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
IPC分类号： H04W24/10 , H04L1/00 , H04W24/00
CPC分类号： H04W24/10 , H04L1/0006 , H04L1/0026 , H04W24/00
摘要： Techniques for efficiently sending reports in a wireless communication system are described. Reports may be sent repetitively in accordance with a reporting format. A terminal receives an assignment of a control channel used to send reports and determines a reporting format to use based on the assignment. The reporting format indicates a specific sequence of reports sent in specific locations of a control channel frame. The terminal generates a set of reports for each reporting interval and arranges the set of reports in accordance with the reporting format. The terminal repetitively sends a plurality of sets of reports in a plurality of reporting intervals. Reports may also be sent adaptively based on operating conditions. An appropriate reporting format may be selected based on the operating conditions of the terminal, which may be characterized by environment (e.g., mobility), capabilities, QoS, and/or other factors.

2. 发明申请

US20100211540A9 Efficient reporting of information in a wireless communication system 有权
标题翻译：在无线通信系统中有效地报告信息
公开(公告)号：US20100211540A9
公开(公告)日：2010-08-19
申请号：US11486601
申请日：2006-07-14
申请人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
发明人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
IPC分类号： G06F17/30
CPC分类号： H04W24/10 , H04L1/0006 , H04L1/0026 , H04W24/00
摘要： Techniques for efficiently sending reports in a wireless communication system are described. Reports may be sent repetitively in accordance with a reporting format. A terminal receives an assignment of a control channel used to send reports and determines a reporting format to use based on the assignment. The reporting format indicates a specific sequence of reports sent in specific locations of a control channel frame. The terminal generates a set of reports for each reporting interval and arranges the set of reports in accordance with the reporting format. The terminal repetitively sends a plurality of sets of reports in a plurality of reporting intervals. Reports may also be sent adaptively based on operating conditions. An appropriate reporting format may be selected based on the operating conditions of the terminal, which may be characterized by environment (e.g., mobility), capabilities, QoS, and/or other factors.
摘要翻译：描述在无线通信系统中有效地发送报告的技术。可以按照报告格式重复发送报告。终端接收用于发送报告的控制信道的分配，并根据分配确定要使用的报告格式。报告格式指示在控制信道帧的特定位置发送的特定报告序列。终端为每个报告间隔生成一组报告，并根据报告格式安排报告集。终端在多个报告间隔重复发送多组报告。报告也可以根据操作条件自适应地发送。可以基于可以由环境（例如，移动性），能力，QoS和/或其他因素来表征的终端的操作条件来选择适当的报告格式。

3. 发明授权

US06553019B1 Communications system employing orthogonal frequency division multiplexing based spread sprectrum multiple access 有权
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.

4. 发明授权

US06922388B1 Signal construction, detection and estimation for uplink timing synchronization and access control in a multi-access wireless communication system 有权
标题翻译：用于多接入无线通信系统中的上行链路定时同步和接入控制的信号构造，检测和估计
公开(公告)号：US06922388B1
公开(公告)日：2005-07-26
申请号：US09503041
申请日：2000-02-11
申请人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Sathyadev Venkata Uppala
发明人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Sathyadev Venkata Uppala
IPC分类号： H04J11/00 , H04B7/26 , H04J3/06 , H04L5/02 , H04L7/10 , H04L27/26
CPC分类号： H04J3/0682 , H04L5/023 , H04L27/2607 , H04L27/2614 , H04L27/2646 , H04L27/2662
摘要： Signal construction, detection and estimation techniques for use in uplink timing synchronization and access control in an orthogonal frequency division multiplexed (OFDM) wireless system or other type of wireless communication system. In accordance with an illustrative embodiment of the invention, timing and access signals to be transmitted in designated timing and access intervals are constructed from orthogonal multitone signals. The multitone signals may be similar to multitone signals used in OFDM data transmission, except that a cyclic prefix associated with reception of the signals in a base station is extended to cover the timing errors of mobile stations not yet synchronized. The invention also provides design techniques which optimize the time resolvability and peak-to-average ratio of the multitone signals, an efficient fast Fourier transform (FFT) based technique for maximum likelihood timing estimation, and a robust linear filtering technique for averaging timing estimates from different synchronizations.
摘要翻译：用于正交频分复用（OFDM）无线系统或其他类型的无线通信系统中的上行链路定时同步和接入控制的信号构造，检测和估计技术。根据本发明的说明性实施例，将以指定的定时和访问间隔发送的定时和接入信号由正交多音信号构成。多音信号可以类似于在OFDM数据传输中使用的多音信号，除了与基站中的信号的接收相关联的循环前缀被扩展以覆盖尚未同步的移动台的定时错误。本发明还提供了优化多音信号的时间可解析性和峰均比的设计技术，用于最大似然定时估计的基于有效快速傅立叶变换（FFT）的技术，以及用于平均定时估计的鲁棒线性滤波技术不同的同步。

5. 发明申请

US20070168326A1 Efficient reporting of information in a wireless communication system 有权
标题翻译：在无线通信系统中有效地报告信息
公开(公告)号：US20070168326A1
公开(公告)日：2007-07-19
申请号：US11486601
申请日：2006-07-14
申请人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
发明人： Arnab Das , Sundeep Rangan , Pablo Anigstein , Junyi Li , Sathyadev Venkata Uppala , Rajiv Laroia
IPC分类号： G06F17/30
CPC分类号： H04W24/10 , H04L1/0006 , H04L1/0026 , H04W24/00
摘要： Techniques for efficiently sending reports in a wireless communication system are described. Reports may be sent repetitively in accordance with a reporting format. A terminal receives an assignment of a control channel used to send reports and determines a reporting format to use based on the assignment. The reporting format indicates a specific sequence of reports sent in specific locations of a control channel frame. The terminal generates a set of reports for each reporting interval and arranges the set of reports in accordance with the reporting format. The terminal repetitively sends a plurality of sets of reports in a plurality of reporting intervals. Reports may also be sent adaptively based on operating conditions. An appropriate reporting format may be selected based on the operating conditions of the terminal, which may be characterized by environment (e.g., mobility), capabilities, QoS, and/or other factors.
摘要翻译：描述在无线通信系统中有效地发送报告的技术。可以按照报告格式重复发送报告。终端接收用于发送报告的控制信道的分配，并根据分配确定要使用的报告格式。报告格式指示在控制信道帧的特定位置发送的特定报告序列。终端为每个报告间隔生成一组报告，并根据报告格式安排报告集。终端在多个报告间隔重复发送多组报告。报告也可以根据操作条件自适应地发送。可以基于可以由环境（例如，移动性），能力，QoS和/或其他因素来表征的终端的操作条件来选择适当的报告格式。

6. 发明授权

US06967936B1 Uplink timing synchronization and access control for a multi-access wireless communication system 有权
标题翻译：用于多址无线通信系统的上行链路定时同步和访问控制
公开(公告)号：US06967936B1
公开(公告)日：2005-11-22
申请号：US09503040
申请日：2000-02-11
申请人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Sathyadev Venkata Uppala
发明人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Sathyadev Venkata Uppala
IPC分类号： H04J11/00 , H04B7/26 , H04L5/02 , H04L7/00 , H04L27/26 , H04Q7/00
CPC分类号： H04W56/0005 , H04J3/0682 , H04L5/023
摘要： Improved timing synchronization and access control techniques for use in an orthogonal frequency division multiplexed (OFDM) wireless system or other type of wireless communication system. In accordance with the invention, an uplink synchronization and access control system is provided in which mobile stations transmit certain timing and access signals in dedicated intervals in an uplink stream. Access control is illustratively implemented as a two-stage process in which a given mobile first transmits a generic uplink access signal in one of the intervals. If this access is accepted, the base station transmits an access acknowledgment containing initial timing and power corrections, along with initial channel assignments on which the mobile can initiate a call set-up process. For re-synchronization, mobiles transmit timing synchronization signals in the dedicated timing and access intervals. The base station measures the arrival time of the signals, and sends back appropriate timing corrections. The invention thereby ensures that orthogonality between mobiles is maintained.
摘要翻译：用于正交频分复用（OFDM）无线系统或其他类型的无线通信系统中的改进的定时同步和接入控制技术。根据本发明，提供一种上行链路同步和接入控制系统，其中移动台在上行链路流中以专用间隔发送某些定时和接入信号。访问控制被示意性地实现为两阶段过程，其中给定移动单元首先在其中一个间隔中发送通用上行链路接入信号。如果该接入被接受，则基站发送包含初始定时和功率校正的接入确认以及移动台可以在其上启动呼叫建立过程的初始信道分配。为了重新同步，移动台以专用定时和接入间隔发送定时同步信号。基站测量信号的到达时间，并发回适当的时序校正。因此，本发明确保了移动台之间的正交性得以维持。

7. 发明授权

US08582536B2 Methods and apparatus of providing transmit diversity in a multiple access wireless communication system 有权
公开(公告)号：US08582536B2
公开(公告)日：2013-11-12
申请号：US12630130
申请日：2009-12-03
申请人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Murari Srinivasan
发明人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Murari Srinivasan
IPC分类号： H04W4/00
CPC分类号： H04B7/0626
摘要： Methods and apparatus for providing channel diversity to wireless terminals (WTs) in a manner that reduces the latency between the time a WT encounters satisfactory channel conditions are described. A plurality of communications channels with different physical characteristics are maintained in a cell by a base station (BS). Each WT monitors multiple channels and maintains multiple channel estimates at the same time so that rapid switching between channels is possible. Channel quality information is conveyed from each WT to the BS. The WT or BS selects a channel based on the measured channel quality. By supporting multiple channels and by introducing periodic variations into the channels in various embodiments, the time before a WT encounters a channel with good or acceptable channel conditions is minimized even if the WT does not change location. Multiple antennas are used at the BS to support numerous channels simultaneously, e.g., by controlling antenna patterns.

8. 发明申请

US20100190514A1 EFFICIENT PAGING IN A WIRELESS COMMUNICATION SYSTEM 有权
标题翻译：无线通信系统中的高效寻呼
公开(公告)号：US20100190514A1
公开(公告)日：2010-07-29
申请号：US12751961
申请日：2010-03-31
申请人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Prashanth Hande
发明人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Prashanth Hande
IPC分类号： H04W68/02
CPC分类号： H04W68/025 , Y02D70/00
摘要： Methods and apparatus for efficient two-stage paging wireless communications systems are described. Wireless terminals are assigned to paging groups. A few first paging message information bits are modulated (using non-coherent modulation) into a first paging signal and communicated from a base station to wireless terminals. WTs wake-up, receive the first paging signal and quickly ascertain whether its paging group should expect a second paging signal, if so, the WT is operated to receive the second paging signal; otherwise, the WT goes back to sleep conserving power. The base station modulates (using coherent modulation) a number of second message information bits into a second paging signal and transmits the signal to WTs. From the information in first and second paging signals, a WT can determine that it is the paged WT and process the paging instructions. The intended paged WT can transmit an acknowledgement signal on a dedicated uplink resource.
摘要翻译：描述了用于有效的两阶段寻呼无线通信系统的方法和装置。无线终端被分配给寻呼组。几个第一寻呼消息信息比特被调制（使用非相干调制）到第一寻呼信号中并从基站传送到无线终端。 WT唤醒，接收第一个寻呼信号，并快速确定其寻呼组是否应该预期第二个寻呼信号，如果是，则操作WT接收第二寻呼信号; 否则，WT回去睡眠节省电力。基站将多个第二消息信息比特（使用相干调制）调制成第二寻呼信号，并将该信号发送给WT。根据第一和第二寻呼信号中的信息，WT可以确定它是寻呼WT并处理寻呼指令。预期的寻呼WT可以在专用上行链路资源上发送确认信号。

9. 发明申请

US20090109851A1 METHODS AND APPARATUS RELATED TO SCHEDULING TRAFFIC IN A WIRELESS COMMUNICATIONS SYSTEM USING SHARED AIR LINK TRAFFIC RESOURCES 有权
标题翻译：使用共享空中链路交通资源在无线通信系统中调度交通相关的方法和装置
公开(公告)号：US20090109851A1
公开(公告)日：2009-04-30
申请号：US11933042
申请日：2007-10-31
申请人： Junyi Li , Rajiv Laroia , Sundeep Rangan , Thomas Richardson , Xinzhou Wu , Saurabh Tavildar
发明人： Junyi Li , Rajiv Laroia , Sundeep Rangan , Thomas Richardson , Xinzhou Wu , Saurabh Tavildar
IPC分类号： H04L12/28
CPC分类号： H04W72/1231 , H04W72/1278 , H04W84/18 , H04W92/18
摘要： Methods and apparatus for use in a wireless communications system in which traffic air link resources may be, and sometimes are, shared are described. Various described methods and apparatus are well suited for use in a peer to peer communications system in which transmission control decisions are made in a decentralized manner. An exemplary peer to peer communications system implements the scheduling of traffic intervals in a distributed manner utilizing connection priority information and interference information. An exemplary peer to peer timing structure includes a user scheduling interval and an associated traffic interval. The user scheduling interval includes a plurality transmission request/request response rounds. By utilizing multiple request/request response rounds, a transmission decision corresponding to a connection to yield in an earlier round can be overridden in a subsequent round, resulting in higher overall traffic throughput in the system.
摘要翻译：描述用于其中交通空中链路资源可以共享的无线通信系统中的方法和装置。各种描述的方法和装置非常适合用于以分散方式进行传输控制决定的对等通信系统。示例性的对等通信系统利用连接优先级信息和干扰信息以分布式方式实现业务间隔的调度。一种示例性的对等定时结构包括用户调度间隔和相关联的业务间隔。用户调度间隔包括多个发送请求/请求响应轮。通过利用多个请求/请求响应轮，可以在随后的一轮中覆盖对应于在较早轮中产生的连接的传输决定，导致系统中更高的总体流量吞吐量。

10. 发明授权

US07039370B2 Methods and apparatus of providing transmit and/or receive diversity with multiple antennas in wireless communication systems 有权
公开(公告)号：US07039370B2
公开(公告)日：2006-05-02
申请号：US10964885
申请日：2004-10-14
申请人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Murari Srinivasan , Frank A. Lane , Prashanth Hande
发明人： Rajiv Laroia , Junyi Li , Sundeep Rangan , Murari Srinivasan , Frank A. Lane , Prashanth Hande
IPC分类号： H04B7/02
CPC分类号： H04B7/0604 , H01Q3/24 , H01Q3/2605 , H04B7/061 , H04B7/0691 , H04B7/0805 , H04L1/0026 , H04L5/0007 , H04L5/0023 , H04L5/0026 , H04L5/006 , H04W52/42
摘要： Transmit and/or receive diversity is achieved using multiple antennas. In some embodiments, a single transmitter chain within a wireless terminal is coupled over time to a plurality of transmit antennas. At any given time, a controllable switching module couples the single transmitter chain to one the plurality of transmit antennas. Over time, the switching module couples the output signals from the single transmitter chain to different transmit antennas. Switching decisions are based upon predetermined information, dwell information, and/or channel condition feedback information. Switching is performed on some dwell and/or channel estimation boundaries. In some OFDM embodiments, each of multiple transmitter chains is coupled respectively to a different transmit antenna. Information to be transmitted is mapped to a plurality of tones. Different subsets of tones are formed for and transmitted through different transmit chain/antenna sets simultaneously. The balance of tones allocated to the subsets for each antenna are changed as a function of predetermined information, dwell information, and/or channel condition feedback information.

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