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31. 发明授权

US07961683B2 Active session mobility solution for point-to-point protocol 有权
标题翻译：用于点到点协议的活动会话移动性解决方案
公开(公告)号：US07961683B2
公开(公告)日：2011-06-14
申请号：US10954973
申请日：2004-09-30
申请人： Suman Das , Anand Kagalkar , Sarit Mukherjee , Sureshbabu P. Nair , Priya Rajan , Ajay Rajkumar , Sampath Rangarajan , Michael D. Turner , Harish Viswanathan
发明人： Suman Das , Anand Kagalkar , Sarit Mukherjee , Sureshbabu P. Nair , Priya Rajan , Ajay Rajkumar , Sampath Rangarajan , Michael D. Turner , Harish Viswanathan
IPC分类号： H04W4/00
CPC分类号： H04W80/00 , H04L69/16 , H04L69/168 , H04W8/087
摘要： An active session mobility solution for point-to-point protocol (PPP) in accordance with the present invention provides fast and smooth handoff by reducing tunneling overhead on tunneling mechanisms, such as P-P tunneling from a serving Source (e.g., a PPP termination device) to a new serving Target (e.g., a PPP termination device). In the active session mobility solution of the present invention, PPP session can be migrated even if not all phases have been completed (e.g., LCP, PAP/CHAP completed but not IPCP and CCP). In such cases, the incomplete phases will be negotiated at the PPP of the Target PPP.
摘要翻译：根据本发明的用于点对点协议（PPP）的主动会话移动性解决方案通过减少诸如来自服务源（例如，PPP终端设备）的PP隧道的隧道机制的隧道开销来提供快速和平滑的切换，到新的服务目标（例如，PPP终端设备）。在本发明的活动会话移动性解决方案中，即使不是所有阶段都已经完成（例如，LCP，PAP / CHAP完成但不是IPCP和CCP），PPP会话可以被迁移。在这种情况下，不完整的阶段将以目标公私合作伙伴关系的PPP进行协商。

32. 发明申请

US20110016321A1 Automated Security Provisioning Protocol for Wide Area Network Communication Devices in Open Device Environment 有权
标题翻译：用于开放设备环境中的广域网通信设备的自动安全配置协议
公开(公告)号：US20110016321A1
公开(公告)日：2011-01-20
申请号：US12503051
申请日：2009-07-14
申请人： Ganapathy S. Sundaram , Harish Viswanathan
发明人： Ganapathy S. Sundaram , Harish Viswanathan
IPC分类号： H04L29/06
CPC分类号： H04L63/061 , H04L63/0442 , H04L63/0869 , H04L67/12 , H04L67/34 , H04W4/00 , H04W4/70 , H04W8/205 , H04W12/04 , H04W12/06 , H04W74/00 , H04W84/04 , H04W92/18
摘要： An automated security provisioning protocol is provided for wide area network communication devices in an open device environment, such as cellular communication devices in a machine-to-machine (M2M) environment. For example, a method for performing a security provisioning protocol between a first communication device and a second communication device over at least one wide area communication network comprises the following steps from the perspective of the first communication device. The first communication device automatically uses access information not previously provisioned in the wide area communication network to gain access to the wide area communication network for an initial purpose of communicating with the second communication device. The first communication device, upon gaining access to the wide area communication network, automatically performs an authenticated key exchange operation with the second communication device over the wide area communication network and establishes a secure communication key as a result of the authenticated key exchange operation for subsequent use by the first communication device for secure communications. The wide area communication network is operated by a first entity and the second communication device is operated by a second entity.
摘要翻译：在诸如机器对机器（M2M）环境中的蜂窝通信设备的开放设备环境中为广域网通信设备提供自动安全提供协议。例如，用于在第一通信设备和第二通信设备之间通过至少一个广域通信网络执行安全提供协议的方法包括从第一通信设备的角度来看以下步骤。第一通信设备自动使用广域通信网络中以前未配置的接入信息，以获得对广域通信网络的访问，以便与第二通信设备进行通信的初始目的。第一通信设备在通过广域通信网访问时，通过广域通信网络自动执行与第二通信设备的认证密钥交换操作，并且作为后续认证的密钥交换操作的结果建立安全通信密钥由第一通信设备用于安全通信。广域通信网络由第一实体操作，第二通信设备由第二实体操作。

33. 发明授权

US07489929B2 Hard handoff procedure for dedicated and high speed shared channels 有权
标题翻译：专用和高速共享通道的硬切换程序
公开(公告)号：US07489929B2
公开(公告)日：2009-02-10
申请号：US11095043
申请日：2005-03-31
申请人： Suman Das , Ali Masoomzadeh-Fard , Martin H. Meyers , Harish Viswanathan
发明人： Suman Das , Ali Masoomzadeh-Fard , Martin H. Meyers , Harish Viswanathan
IPC分类号： H04Q7/20
CPC分类号： H04W36/18 , H04W36/12
摘要： A wireless communication network (20) utilizes a hard handoff procedure for switching between cells serving a mobile station (40). In a disclosed example, the existing link between the mobile station (40) and a serving base station (38) is not released until a new link between a target base station (32) and a mobile station (40) is established. At the same time, however, the mobile station maintains only one base station or link within its active set at all times. The disclosed example is useful for dedicated channel and shared channel communications in CDMA systems, for example.
摘要翻译：无线通信网络（20）利用硬切换过程来在服务于移动台（40）的小区之间切换。在公开的示例中，在建立目标基站（32）和移动站（40）之间的新链路之前，不释放移动台（40）与服务基站（38）之间的现有链路。然而，同时，移动台始终在其活动集内仅维护一个基站或链路。例如，所公开的示例对于CDMA系统中的专用信道和共享信道通信是有用的。

34. 发明申请

US20090010216A1 MEDIA-ACCESS-CONTROL PROTOCOL FOR A NETWORK EMPLOYING MULTI-USER WIRELESS CHANNELS 有权
标题翻译：使用多用户无线通道的网络的媒体访问控制协议
公开(公告)号：US20090010216A1
公开(公告)日：2009-01-08
申请号：US12124258
申请日：2008-05-21
申请人： Li Li , Harish Viswanathan , Ramachandran Ramjee
发明人： Li Li , Harish Viswanathan , Ramachandran Ramjee
IPC分类号： H04Q7/00 , H04B7/00
CPC分类号： H04W40/02 , H04L1/0002 , H04L1/0057 , H04L45/125 , H04W40/34 , H04W72/1263 , Y02D70/142 , Y02D70/22 , Y02D70/30
摘要： A medium-access-control (MAC) scheduler, according to one embodiment of which a station of a wireless network evaluates data throughputs corresponding to three different transmission configurations for transmission of a packet over a first of that station's wireless links. The first and second of those transmission configurations have the packet encoded in the first and second tiers, respectively, of a two-tier signal. The third transmission configuration has the packet encoded as a conventional single-tier signal. For each of the first and second transmission configurations, the station selects a second of that station's wireless links for transmission of at least a second packet, with the first and second packets encoded in different respective tiers of the two-tier signal. The station varies power allocation between the first and second tiers to optimize data throughput for each of the first and second transmission configurations and selects from the first, second, and third transmission configurations one resulting in the highest data throughput.
摘要翻译：媒体访问控制（MAC）调度器，根据其一个实施例，无线网络的站评估对应于三个不同传输配置的数据吞吐量，以在该站的无线链路上的第一个无线链路上传输分组。这些传输配置中的第一和第二配置分别在两层信号的第一和第二层中编码分组。第三传输配置将分组编码为传统的单层信号。对于第一和第二传输配置中的每一个，站选择该站的无线链路中的第二个用于传输至少第二分组，其中第一和第二分组被编码在两层信号的不同相应层中。该站改变第一和第二层之间的功率分配，以优化第一和第二传输配置中的每一个的数据吞吐量，并且从第一，第二和第三传输配置中选择一个导致最高数据吞吐量。

35. 发明申请

US20080062857A1 Method of OFDM communication using superposition coding 有权
标题翻译：使用叠加编码的OFDM通信方法
公开(公告)号：US20080062857A1
公开(公告)日：2008-03-13
申请号：US11516840
申请日：2006-09-07
申请人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
发明人： Pantelis Monogioudis , Shirish Nagaraj , Sivarama Krishnan Venkatesan , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2649 , H04L5/0007 , H04L27/2627
摘要： Improvements are provided in an OFDM network that uses superposition coding. A broadcast signal and e.g. a unicast signal are each subjected to OFDM modulation including processing by an IDFT, combined, and transmitted using non-orthogonal transmission resources. In one approach, the respective signals are combined after instead of before the IDFT processing. In specific examples, a respective cyclic prefix is appended to each signal after the IDFT processing but before the respective signals are combined. In another approach, a broadcast pilot signal and e.g. a unicast pilot signal are transmitted concurrently with the broadcast and unicast information signals. The pilot signals are transmitted using the same time and subcarrier resources, but are made more distinguishable by combining each with a respective scrambling or spreading code. In specific examples, embodiments, the unicast pilot signal is used for estimating the data rate for transmission of further unicast information signals.
摘要翻译：在使用叠加编码的OFDM网络中提供了改进。广播信号，例如。单播信号各自进行OFDM调制，包括通过IDFT的处理，组合并使用非正交传输资源发送。在一种方法中，相应的信号在IDFT处理之前被组合。在具体示例中，在IDFT处理之后但在组合各个信号之前，将各个循环前缀附加到每个信号。在另一种方法中，广播导频信号，例如，单播导频信号与广播和单播信息信号同时发送。导频信号使用相同的时间和子载波资源发送，但是通过将每一个与相应的加扰或扩展码相结合使得更加可区分。在具体示例的实施例中，单播导频信号用于估计用于传输另外的单播信息信号的数据速率。

36. 发明申请

US20070207811A1 A METHOD FOR CONTROLLING PAGING AND REGISTRATION OF A MOBILE DEVICE IN A WIRELESS COMMUNICATIONS SYSTEM 审中-公开
标题翻译：一种在无线通信系统中控制移动设备的寻呼和注册的方法
公开(公告)号：US20070207811A1
公开(公告)日：2007-09-06
申请号：US11745964
申请日：2007-05-08
申请人： SUMAN DAS , Thierry Klein , Kin Leung , Sayandev Mukherjee , George Rittenhouse , Louis Samuel , Harish Viswanathan , Haitao Zheng
发明人： SUMAN DAS , Thierry Klein , Kin Leung , Sayandev Mukherjee , George Rittenhouse , Louis Samuel , Harish Viswanathan , Haitao Zheng
IPC分类号： H04Q7/22
CPC分类号： H04W68/00 , H04W68/04
摘要： A method for locating a mobile device in a wireless communications system comprised of a plurality of base stations is provided. The method comprises associating the mobile device with a first base station of the plurality of base stations. Thereafter, a paging signal is delivered from a subset of base stations associated with the first base station to the mobile device. The subset of base stations may correspond to a network active set of base stations associated with the mobile device. Thereafter, when a signal from one of the base stations in the subset of base stations is received, indicating that the mobile device responded to the paging signal from the one base station, then the mobile device is located and may be associated with the one base station for future paging attempts.
摘要翻译：提供了一种用于在由多个基站组成的无线通信系统中定位移动设备的方法。该方法包括将移动设备与多个基站中的第一基站相关联。此后，寻呼信号从与第一基站相关联的基站的子集传送到移动设备。基站的子集可以对应于与移动设备相关联的基站的网络主动集合。此后，当接收到来自基站子集中的一个基站的信号时，指示移动设备响应于来自一个基站的寻呼信号，则移动设备被定位并且可以与一个基站相关联电台用于未来的寻呼尝试。

37. 发明申请

US20070189369A1 Open-Loop Diversity Technique for Systems Employing Multi-Transmitter Antennas 有权
公开(公告)号：US20070189369A1
公开(公告)日：2007-08-16
申请号：US11737535
申请日：2007-04-19
申请人： Harish Viswanathan
发明人： Harish Viswanathan
IPC分类号： H04B1/00
CPC分类号： H04L1/0618 , H04B7/0669
摘要： A method and apparatus for increasing the capacity of a system that use four transmit antennas and that employs conventional channel coding by performing space-time coding in a particular way. Each of two pairs of symbol sub-streams is space-time coded to form a respective pair of transmit-sequence chains, where at least one of the formed pairs of the transmit-sequence chains is a function of symbols of the respective symbol-sub-stream pair and not a function of the symbols of the other symbol-sub-stream pair. Four transmit sequences—two transmit sequences from each of the two pairs of symbol sub-streams—may be viewed as forming a transmission matrices B or B′ arranged as follows: Antenna 105 ⁢ - ⁢ 1 Antenna 105 ⁢ - ⁢ 2 Antenna 105 ⁢ - ⁢ 3 Antenna 105 ⁢ - ⁢ 4 ⁢ [ b 1 b 1 - b 2 * - b 2 * b 2 b 2 b 1 * b 1 * b 3 - b 3 - b 4 * b 4 * b 4 - b 4 b 3 - b 3 * ] ⁢ T 1 T 2 ⁢ T 3 ⁢ T 4 ⁢ ⁢ or , ⁢ ⁢ Antenna 105 ⁢ - ⁢ 1 Antenna 105 ⁢ - ⁢ 2 Antenna 105 ⁢ - ⁢ 3 Antenna 105 ⁢ - ⁢ 4 ⁢ [ b 1 - b 2 * 0 0 b 2 b 1 * 0 0 0 0 b 3 - b 4 * 0 0 b 4 b 3 * ] ⁢ T 1 T 2 ⁢ T 3 ⁢ T 4 , respectively, where b1, b2, b3, and b4 are the symbols derived from a respective one of four symbol sub-streams, and b*1, b*2, b*3, and b*4 are, respectively, the complex conjugate of the aforementioned symbols. The rows of the matrix represent the different antennas, while the columns represent different symbol periods.

38. 发明申请

US20070165857A1 Method for transmitting control information on the forward link of a wireless network 有权
标题翻译：用于在无线网络的前向链路上发送控制信息的方法
公开(公告)号：US20070165857A1
公开(公告)日：2007-07-19
申请号：US11332023
申请日：2006-01-13
申请人： Suman Das , Shirish Nagaraj , Subramanian Vasudevan , Harish Viswanathan
发明人： Suman Das , Shirish Nagaraj , Subramanian Vasudevan , Harish Viswanathan
IPC分类号： H04N7/167
CPC分类号： H04L5/0053 , H04L5/0016
摘要： A signaling method is provided that can improve the efficiency of forward-link control signaling in OFDM systems. The method involves using a set of forward-link subcarriers that are dedicated for control information, and are shared by a set of two or more users. The control information destined for each user is spread using a respective spreading code, thereby to provide a spread control message. The spread control messages destined for the various users are summed together prior to transmission.
摘要翻译：提供了一种可以提高OFDM系统中前向链路控制信令的效率的信令方法。该方法包括使用专用于控制信息的一组前向链路子载波，并由一组两个或更多个用户共享。使用相应的扩展码来扩展发往每个用户的控制信息，从而提供扩展控制消息。传输给各种用户的扩展控制消息在发送之前被加在一起。

39. 发明申请

US20070047569A1 Interference-reducing method of forward link scheduling for wireless networks 有权
标题翻译：无线网络前向链路调度的干扰减少方法
公开(公告)号：US20070047569A1
公开(公告)日：2007-03-01
申请号：US11210038
申请日：2005-08-23
申请人： Suman Das , Harish Viswanathan
发明人： Suman Das , Harish Viswanathan
IPC分类号： H04Q7/00 , H04L12/56 , H04B7/212 , H04Q7/20 , H04B7/00
CPC分类号： H04W72/06 , H04L47/10 , H04W16/24 , H04W52/281 , H04W72/10
摘要： A method of scheduling and sub-channelization is provided for a wireless network such as an OFDMA network. Distributed coordination is applied across sectors, such neighboring sectors will tend to schedule cell-edge users at the same time, while sub-channelizing to different portions of the full frequency band available for forward link transmissions. This tendency is achieved by dividing each sector's users into user classes which depend upon forward link channel quality. Each user class is assigned a different set of priorities for use of available timeslots and subcarriers.
摘要翻译：为诸如OFDMA网络的无线网络提供调度和子信道化的方法。跨部门应用分布式协调，这些相邻扇区将倾向于同时调度小区边缘用户，同时将子频道化到可用于前向链路传输的全频段的不同部分。这种趋势是通过将每个扇区的用户划分为依赖于前向链路信道质量的用户类来实现的。为每个用户类分配不同的优先级集合，以使用可用的时隙和副载波。

40. 发明授权

US07020072B1 Orthogonal frequency division multiplexing transmit diversity system for frequency-selective fading channels 有权
标题翻译：用于频率选择性衰落信道的正交频分复用发射分集系统
公开(公告)号：US07020072B1
公开(公告)日：2006-03-28
申请号：US09568170
申请日：2000-05-09
申请人： Xiaodong Li , Constantinos Basil Papadias , Harish Viswanathan
发明人： Xiaodong Li , Constantinos Basil Papadias , Harish Viswanathan
IPC分类号： H04J11/00
CPC分类号： H04L27/2602 , H04B7/0669 , H04L1/0606 , H04L1/0656 , H04L27/2607 , H04L27/2626
摘要： Wireless communications for frequency-selective fading channels is realized by employing a system including orthogonal frequency division multiplexing (OFDM) in combination with an at least two antenna transmit diversity arrangement. Specifically, OFDM converts a multipath channel into a plurality of narrowband subchannels each having flat fading. Then, the signals on the same frequency subchannels of the at least two antennas are grouped together. Considering a first frequency subchannel, during a first OFDM time interval, a first signal and a second signal are transmitted on the first frequency subchannel from a first antenna (0) and from a second antenna (1), respectively. During a second OFDM time interval, a reverse sign (−) complex conjugate of the second signal and a complex conjugate of the first signal are transmitted from the first antenna and the second antenna, respectively. In a specific embodiment of the invention, reduced complexity in the implementation is realized by a reverse order complex conjugate and a reverse order, reverse sign (−) complex conjugate and judicious selection of the processed data signals in order to transmit the appropriate ones of the signals during the first and second OFDM intervals. Again, if the channel remains constant over the two OFDM intervals, diversity combination is realized for each frequency subchannel. In another embodiment of the invention, antenna-group hopping is employed in conjunction with pairing in time of the OFDM frequency subchannel signals to realize increased transmit diversity without rate loss.
摘要翻译：用于频率选择性衰落信道的无线通信通过采用包括正交频分复用（OFDM）与至少两个天线发射分集布置的系统来实现。具体地，OFDM将多路径信道转换成各自具有平坦衰落的多个窄带子信道。然后，将至少两个天线的相同频率子信道上的信号分组在一起。考虑到第一频率子信道，在第一OFDM时间间隔期间，分别从第一天线（0）和第二天线（1）在第一频率子信道上发送第一信号和第二信号。在第二OFDM时间间隔期间，分别从第一天线和第二天线发送第二信号的反向符号（ - ）复共轭和第一信号的复共轭。在本发明的具体实施例中，实现方式的复杂度降低通过反向顺序复共轭和反向顺序，反向符号（ - ）复共轭和被处理数据信号的明智选择来实现，以便传输适当的信号在第一和第二OFDM间隔期间。再次，如果信道在两个OFDM间隔上保持恒定，则对于每个频率子信道实现分集组合。在本发明的另一个实施例中，天线组跳频与OFDM频率子信道信号的时间配对结合使用，以实现增加的发射分集而不发生速率损失。

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