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1. 发明申请

US20120275326A1 Non-Beacon Network Communications Using Frequency Subbands 有权
标题翻译：使用频率子带的非信标网络通信
公开(公告)号：US20120275326A1
公开(公告)日：2012-11-01
申请号：US13457590
申请日：2012-04-27
申请人： Ramanuja Vedantham , Kumaran Vijayasankar , Anand G. Dabak , Badri N. Varadarajan
发明人： Ramanuja Vedantham , Kumaran Vijayasankar , Anand G. Dabak , Badri N. Varadarajan
IPC分类号： H04L12/26
CPC分类号： H04W72/0453 , H04B3/544 , H04L41/0833 , H04W72/1231 , Y04S40/162
摘要： Systems and methods for designing, using, and/or implementing non-beacon network communications using frequency subbands are described. In various implementations, these systems and methods may be applicable to Power Line Communications (PLC). For example, a method may include transmitting a beacon request message over a given one of a plurality of frequency subbands, receiving a plurality of beacons in response to having transmitted the beacon request message, each of the plurality of beacons received over a respective one of the plurality of frequency subbands, and calculating a downlink quality report based, at least in part, upon the received beacons. The method may also include transmitting the downlink quality report over each of the plurality of frequency subbands and receiving a subband allocation command in response to having transmitted the downlink quality report, the subband allocation command indicating a downlink subband assignment and an uplink subband assignment.
摘要翻译：描述了使用频率子带设计，使用和/或实现非信标网络通信的系统和方法。在各种实现中，这些系统和方法可以适用于电力线通信（PLC）。例如，一种方法可以包括在多个频率子带中的给定的一个频带上传送信标请求消息，响应于已经发送了信标请求消息来接收多个信标，多个信标中的每一个在所述多个频率子带，并且至少部分地基于所接收的信标来计算下行链路质量报告。该方法还可以包括：响应于已经发送下行链路质量报告，指示下行链路子带分配的子带分配命令和上行链路子带分配，在多个频率子带中的每一个上发送下行链路质量报告，并接收子带分配命令。

2. 发明申请

US20120236876A1 MAC PROTOCOLS WITH SUBBANDING 有权
标题翻译： MAC协议与SUBBANDING
公开(公告)号：US20120236876A1
公开(公告)日：2012-09-20
申请号：US13408521
申请日：2012-02-29
申请人： Kumaran Vijayasankar , Shu Du , Anand G. Dabak , Badri N. Varadarajan , Il Han Kim , Xiaolin Lu
发明人： Kumaran Vijayasankar , Shu Du , Anand G. Dabak , Badri N. Varadarajan , Il Han Kim , Xiaolin Lu
IPC分类号： H04J3/16
CPC分类号： H04L12/413 , H04B3/54 , H04B3/56 , H04B2203/5416 , H04B2203/5466 , H04L12/2838 , H04L2012/2843
摘要： Systems and methods for designing, using, and/or implementing media access control (MAC) protocols with subbanding are described. In some embodiments, a method may include receiving a beacon packet during one of a plurality of beacon slots of a superframe, each beacon slot corresponding to one of a plurality of different downlink subbands. The method may also include identifying, based on the received beacon packet, contention access periods following the beacon slots, each of the contention access periods corresponding to one of a plurality of different uplink subbands. The method may further include transmitting an information packet over each of the plurality of uplink subbands during the contention access periods. Then, the method may include receiving, during a guaranteed time slot following the contention access periods, an indication of a selected one of the plurality of uplink subbands to be used in a subsequent communications.
摘要翻译：描述了用于设计，使用和/或实现具有子带的媒体访问控制（MAC）协议的系统和方法。在一些实施例中，一种方法可以包括在超帧的多个信标时隙之一期间接收信标分组，每个信标时隙对应于多个不同的下行链路子带中的一个。该方法还可以包括基于接收到的信标分组来识别在信标时隙之后的争用接入周期，每个竞争接入周期对应于多个不同的上行链路子带之一。该方法还可以包括在竞争访问周期期间在多个上行链路子带中的每一个上传输信息分组。然后，该方法可以包括在竞争访问周期之后的保证时隙期间接收要在后续通信中使用的多个上行链路子带中所选择的一个的指示。

3. 发明申请

US20120236875A1 Slotted Channel Access Techniques in Network Communications 有权
标题翻译：网络通信中的时隙信道接入技术
公开(公告)号：US20120236875A1
公开(公告)日：2012-09-20
申请号：US13421593
申请日：2012-03-15
申请人： Kumaran Vijayasankar , Shu Du , Anand G. Dabak , Badri N. Varadarajan
发明人： Kumaran Vijayasankar , Shu Du , Anand G. Dabak , Badri N. Varadarajan
IPC分类号： H04J3/00 , H04L12/56 , H04B3/54
CPC分类号： H04L12/2838 , H04B3/54 , H04B3/56 , H04B2203/5416 , H04B2203/5466 , H04L12/413 , H04L2012/2843
摘要： Systems and methods for designing, using, and/or implementing slotted channel access techniques in network communications are described. In some embodiments, a method may include selecting one of a plurality of time slots within a contention access period (CAP), each of the plurality of time slots having a predetermined duration, and transmitting a packet during the selected time slot. For example, the time slot may be selected randomly or based on a round-robin algorithm. In some implementations, the duration of each of the plurality of time slots may correspond and/or be equal to: (a) a duration of a data packet of maximum size, (b) a sum of durations of a request-to-send packet, an interframe space, and a clear-to-send packet, and/or (c) a duration of a guaranteed time slot (GTS) or contention free period (CFP) request packet, as prescribed by a given communication protocol or standard.
摘要翻译：描述了在网络通信中设计，使用和/或实现时隙信道接入技术的系统和方法。在一些实施例中，一种方法可以包括选择争用访问周期（CAP）中的多个时隙中的一个，多个时隙中的每个时隙具有预定的持续时间，并且在所选择的时隙期间发送分组。例如，可以随机地或基于循环算法选择时隙。在一些实现中，多个时隙中的每一个的持续时间可以对应于和/或等于：（a）最大大小的数据分组的持续时间，（b）请求发送的持续时间之和分组，帧间间隔和清除发送分组，和/或（c）由给定通信协议或标准规定的保证时隙（GTS）或无争用周期（CFP）请求分组的持续时间。

4. 发明申请

US20120134395A1 Power Line Communications (PLC) Across Different Voltage Domains Using Multiple Frequency Subbands 审中-公开
标题翻译：电力线通信（PLC）跨越不同电压域使用多个频率子带
公开(公告)号：US20120134395A1
公开(公告)日：2012-05-31
申请号：US13300741
申请日：2011-11-21
申请人： Badri N. Varadarajan , Anand G. Dabak , Il Han Kim , Xiaolin Lu
发明人： Badri N. Varadarajan , Anand G. Dabak , Il Han Kim , Xiaolin Lu
IPC分类号： H04B3/54 , H04B17/00 , H04B1/38
CPC分类号： H04B3/542 , H04B2203/5408 , H04B2203/5416 , H04B2203/542
摘要： Systems and methods for implementing power line communications (PLC) across different voltage domains using multiple frequency subbands are described. From an end node's perspective (e.g., a PLC device), a method may include scanning a plurality of downlink subbands usable by a base node (e.g., a PLC router, etc.) to communicate with one or more PLC devices (e.g., other end nodes) from a medium voltage (MV) to a low voltage (LV) power line, and transmitting association request(s) to the base node that select and/or allow the base node to select one or more downlink subbands for use in subsequent communications. From the base node's perspective, the method may include selecting one or more of a plurality of uplink subbands for use in subsequent communications based on the received association request(s). In various implementations, the selection of downlink and/or uplink subbands may be based on signal-to-noise ratio (SNR) values and/or congestion indicators.
摘要翻译：描述了使用多个频率子带在不同电压域之间实现电力线通信（PLC）的系统和方法。从终端节点的观点（例如，PLC设备），一种方法可以包括扫描由基本节点（例如，PLC路由器等）使用的多个下行链路子带，以与一个或多个PLC设备（例如，其他终端节点）从中压（MV）到低电压（LV）电力线路，并且向基站节点发送关联请求，所述基站节点选择和/或允许基站节点选择一个或多个下行链路子带用于后续通讯。从基本节点的观点来看，该方法可以包括基于所接收到的关联请求来选择多个上行链路子带中的一个或多个以用于后续通信。在各种实现中，下行链路和/或上行链路子带的选择可以基于信噪比（SNR）值和/或拥塞指示符。

5. 发明申请

US20110255557A1 Coexistence of Prime, S-FSK and G3 Devices in Powerline Communications 有权
标题翻译： Prime，S-FSK和G3设备在电力线通信中的共存
公开(公告)号：US20110255557A1
公开(公告)日：2011-10-20
申请号：US13079858
申请日：2011-04-05
申请人： Badri N. Varadarajan , Anand G. Dabak , Il Han Kim , Donald P. Shaver
发明人： Badri N. Varadarajan , Anand G. Dabak , Il Han Kim , Donald P. Shaver
IPC分类号： H04J3/24
CPC分类号： H04L27/12 , H04B1/69 , H04B3/542 , H04L27/2601
摘要： Communication devices, such as base nodes and modems, that comply with two or more different standards operate on a shared communication channel. To avoid mutual interference, a base node operating under a first standard reserves time using a contention free period designation. The base node allows devices operating under a second standard to communicate during the reserved time by not assigning the contention free period to another device operating under the first standard. Alternatively, a device using the first standard may avoid interference from transmissions generated under the second standard by modifying data packets prior to transmission. A prefix corresponding to a preamble in the second standard is added to the beginning of the data packet created under the first standard. Devices operating under the second standard observe the prefix and recognize that the channel is active. The second-standard devices backoff from transmission thereby minimizing interference.
摘要翻译：符合两个或多个不同标准的通信设备，例如基础节点和调制解调器，在共享通信信道上运行。为了避免相互干扰，基站在第一标准预留时间内使用无竞争周期指定运行。基站节点允许在预留时间内通过不将无竞争周期分配给在第一标准下运行的另一设备来在第二标准下运行的设备进行通信。或者，使用第一标准的设备可以通过在传输之前修改数据分组来避免在第二标准下产生的传输的干扰。将与第二标准中的前导码相对应的前缀添加到在第一标准下创建的数据包的开头。在第二个标准下运行的设备观察前缀并识别该通道是活动的。第二标准设备从传输中退出，从而最小化干扰。

6. 发明申请

US20110026621A1 OFDM TRANSMISSION METHODS IN THREE PHASE MODES 有权
标题翻译： OFDM传输方法在三相模式中
公开(公告)号：US20110026621A1
公开(公告)日：2011-02-03
申请号：US12839315
申请日：2010-07-19
申请人： Il Han Kim , Badri N. Varadarajan , Anand G. Dabak
发明人： Il Han Kim , Badri N. Varadarajan , Anand G. Dabak
IPC分类号： H04K1/10 , H04L27/00
CPC分类号： H04B3/542 , H04B3/56 , H04B2203/5416 , H04B2203/542 , H04B2203/5466 , H04L5/0023 , H04L25/0204 , H04L25/0248 , H04L25/0276 , H04L27/2626 , H04L27/2647
摘要： Systems and methods for power line transmission are disclosed in which transmitters and receivers are connected to one or more phases of the power line. At least one symbol stream to be transmitted on the power line network is generated. The at least one symbol stream is scaled using a weight vector to generate a plurality of scaled symbol streams. The weight vector comprises a plurality of weights, each corresponding to a phase of the power line network. Each of the scaled symbol streams are transmitted on a corresponding phase of the power line network. A zero crossing detector identifies phase information for a receiver. A concentrator adapts signals to be sent to the receiver based upon the phase associated with the receiver.
摘要翻译：公开了用于电力线传输的系统和方法，其中发射器和接收器连接到电力线的一个或多个相。生成要在电力线网络上发送的至少一个符号流。使用权重向量来缩放至少一个符号流以生成多个缩放的符号流。权重向量包括多个权重，每个权重对应于电力线网络的相位。每个缩放的符号流在电力线网络的相应相位上传输。零交叉检测器识别接收机的相位信息。集中器根据与接收器相关的相位来调整要发送到接收机的信号。

7. 发明申请

US20070248068A1 Downlink Synchronization Channel And Methods For Cellular Systems 有权
标题翻译：下行同步信道和蜂窝系统的方法
公开(公告)号：US20070248068A1
公开(公告)日：2007-10-25
申请号：US11737554
申请日：2007-04-19
申请人： Eko N. Onggosanusi , Anand G. Dabak , Badri N. Varadarajan
发明人： Eko N. Onggosanusi , Anand G. Dabak , Badri N. Varadarajan
IPC分类号： H04Q7/24
CPC分类号： H04W56/0005 , H04J11/0069
摘要： The present invention provides a method of operating a base station transmitter. The method includes providing a cellular downlink synchronization signal having primary and secondary portions, wherein the primary portion employs a corresponding one of a plurality of different primary signals allocated to adjoining transmission cells. The method also includes further providing cell-specific information in the secondary portion and transmitting the cellular downlink synchronization signal. In one embodiment, the primary portion explicitly indicates a partial cell identification information and the remaining cell identification information is carried in the secondary portion. In another embodiment, the plurality of different primary signals are simply used to avoid the channel mismatch effect. The present invention also provides a method of operating user equipment. The method includes receiving a cellular downlink synchronization signal having primary and secondary portions wherein the timing acquisition is performed in conjunction with the primary synchronization sequence index detection via the primary portion. In addition, the secondary portion provides cell-specific parameters and identifying and extracting the secondary portion.
摘要翻译：本发明提供一种操作基站发射机的方法。该方法包括提供具有主要和次要部分的蜂窝下行链路同步信号，其中主要部分采用分配给相邻传输小区的多个不同主要信号中的相应一个信号。该方法还包括在次级部分中进一步提供小区特定信息并发送蜂窝下行同步信号。在一个实施例中，主要部分明确地指示部分小区标识信息，并且剩余小区标识信息在次要部分中携带。在另一个实施例中，简单地使用多个不同的主信号来避免信道失配效应。本发明还提供了一种操作用户设备的方法。该方法包括接收具有主要和次要部分的蜂窝下行链路同步信号，其中定时获取结合经由主要部分的主同步序列索引检测来执行。此外，次级部分提供细胞特异性参数并识别和提取次级部分。

8. 发明授权

US11368190B2 Beacon-enabled communications for variable payload transfers 有权
公开(公告)号：US11368190B2
公开(公告)日：2022-06-21
申请号：US13443123
申请日：2012-04-10
申请人： Kumaran Vijayasankar , Ramanuja Vedantham , Badri N. Varadarajan , Anand G. Dabak
发明人： Kumaran Vijayasankar , Ramanuja Vedantham , Badri N. Varadarajan , Anand G. Dabak
IPC分类号： H04B3/54 , H04L5/00 , H04L25/02
摘要： Systems and methods for designing, using, and/or implementing beacon-enabled communications for variable payload transfers are described. In various embodiments, these systems and methods may be applicable to power line communications (PLC). For example, a method may include implementing a superframe having a plurality of beacon slots, a plurality of intermediate slots following the beacon slots, and a poll-based Contention Free Period (CFP) slot following the intermediate slots. Each of the beacon slots and each of the intermediate slots may correspond to a respective one of a plurality of frequency subbands, and the poll-based CFP slot may correspond to a combination of the plurality of frequency subbands. The method may also include receiving a poll request over a first of the plurality of frequency subbands during the poll-based CFP slot, and then transmitting a data packet over a second of the plurality of frequency subbands during the poll-based CFP slot.

9. 发明授权

US09000897B2 Systems and methods for implementing application profiles and device classes in power line communication (PLC) environments 有权
标题翻译：在电力线通信（PLC）环境中实现应用配置文件和设备类的系统和方法
公开(公告)号：US09000897B2
公开(公告)日：2015-04-07
申请号：US13230419
申请日：2011-09-12
申请人： Il Han Kim , Anand G. Dabak , Badri N. Varadarajan
发明人： Il Han Kim , Anand G. Dabak , Badri N. Varadarajan
IPC分类号： H04B1/38 , H04B3/54 , H04B17/00
CPC分类号： H04B3/542 , H04B2203/5408 , H04B2203/5416 , H04L47/78
摘要： Systems and methods for application profiles and device classes in power line communications (PLCs) are described. In some embodiments, a PLC device may include a processor and a memory coupled to the processor. The memory may be configured to store program instructions, which may be executable by the processor to cause the PLC device to communicate with a higher-level PLC apparatus over a power line using a frequency band. The frequency band may be selected based upon an application profile and/or a device class associated with the PLC device. In some implementations, the higher-level PLC apparatus may include a PLC gateway or a data concentrator, and the PLC device may include a PLC modem or the like. Examples of application profiles include access communications, in-premises connectivity, AC charging, and/or DC charging. Device classes may represent a minimum communication data rate and/or an operating frequency band restriction of the PLC device.
摘要翻译：描述了电力线通信（PLC）中的应用配置文件和设备类的系统和方法。在一些实施例中，PLC设备可以包括处理器和耦合到处理器的存储器。存储器可以被配置为存储可由处理器执行的程序指令，以使PLC设备通过使用频带的电力线路与较高级别的PLC设备进行通信。可以基于与PLC设备相关联的应用简档和/或设备类别来选择频带。在一些实现中，较高级的PLC设备可以包括PLC网关或数据集中器，并且PLC设备可以包括PLC调制解调器等。应用简档的示例包括接入通信，室内连接，AC充电和/或DC充电。设备类可以表示PLC设备的最小通信数据速率和/或操作频带限制。

10. 发明授权

US08923416B2 Symbol-level repetition coding in power line communications 有权
标题翻译：电力线通信中的符号级重复编码
公开(公告)号：US08923416B2
公开(公告)日：2014-12-30
申请号：US13267300
申请日：2011-10-06
申请人： Il Han Kim , Badri N. Varadarajan , Anand G. Dabak
发明人： Il Han Kim , Badri N. Varadarajan , Anand G. Dabak
IPC分类号： H04B3/00 , H03H7/30 , H04W4/00 , H04B3/54 , H04L1/08 , H04L1/00
CPC分类号： H04L1/08 , H04B3/54 , H04B3/546 , H04B2203/5408 , H04B2203/5425 , H04B2203/5433 , H04B2203/5466 , H04L1/0059 , H04L1/0065
摘要： Systems and methods for implementing symbol-level repetition coding in power line communications (PLC) are described. In some embodiments, these systems and methods may provide reliable communication in severe channel environments of PLC networks, at least in part, by changing the forward error correction (FEC) used by various devices operating within current PLC systems. For example, a method may include receiving a PLC signal and applying convolutional encoding to the received signal, the convolutional encoding producing an encoded signal. The method may also include performing a subcarrier modulation operation upon the encoded signal, the subcarrier modulation operation producing a modulated signal. The method may further include applying symbol-level repetition coding to the modulated signal, the symbol-level repetition coding producing a repetitious signal. In some cases, one or more distinct repetition patterns may be applied to different symbols or portions thereof. The repetitious signal may then be transmitted over a power line.
摘要翻译：描述了在电力线通信（PLC）中实现符号级重复编码的系统和方法。在一些实施例中，这些系统和方法可以至少部分地通过改变在当前PLC系统中操作的各种设备使用的前向纠错（FEC）来在PLC网络的严酷信道环境中提供可靠的通信。例如，一种方法可以包括接收PLC信号并对接收到的信号应用卷积编码，卷积编码产生编码信号。该方法还可以包括对编码信号执行子载波调制操作，产生调制信号的子载波调制操作。该方法还可以包括对调制信号应用符号级重复编码，产生符号级重复编码产生重复信号。在一些情况下，可以将一个或多个不同的重复图案应用于不同的符号或其部分。然后可以通过电力线传输重复信号。

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