公开(公告)号：US09326234B2

公开(公告)日：2016-04-26

申请号：US13710282

申请日：2012-12-10

Applicant: STMicroelectronics, Inc.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: H04W52/02 ,  H04W52/14

CPC classification number: H04W52/0206 ,  H04W52/0219 ,  Y02D70/142

Abstract: Methods and systems are disclosed for reduced power consumption in communication networks, including sensor networks implemented according to IEEE 802.11ah, by organizing stations into groups having long sleep periods. By organizing the stations of the network into groups, the access point can match each group's traffic identification map with its target beacon transmit time. One embodiment organizes the stations sequentially by AID numbers. Other embodiments organize the stations by similar power save requirements and/or nearby geographical location. Forms of an Extended Traffic Identification Map are matched with an awaken Target Beacon Transmit Time of the group.

Abstract translation: 公开的方法和系统通过将站组织成具有长睡眠周期的群组来降低通信网络中的功耗，包括根据IEEE 802.11ah实现的传感器网络。 通过将网络组合成组，接入点可以将每个组的流量识别图与其目标信标发送时间相匹配。 一个实施例按照AID号顺序组织站。 其他实施例通过类似的省电要求和/或附近的地理位置组织站。 扩展流量识别图的形式与组的唤醒目标信标发送时间相匹配。

公开(公告)号：US08934390B2

公开(公告)日：2015-01-13

申请号：US13631284

申请日：2012-09-28

Applicant: STMicroelectronics, Inc.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: G08C17/00 ,  G01R31/08 ,  G06F11/00 ,  G08C15/00 ,  H04J1/16 ,  H04J3/14 ,  H04L1/00 ,  H04L12/26 ,  H04L12/28 ,  H04J3/00 ,  H04L12/413

CPC classification number: H04W52/0216 ,  Y02D70/122 ,  Y02D70/142

Abstract: Enhanced low power medium access (LPMA) processes involve the enhanced LPMA STA indicating low power capabilities during association and being allocated an AID. The AID(s) for one or a group of enhanced LPMA STA(s) are included in one TIM sent during a different BEACON interval than the AID(s) for another or another group of enhanced LPMA STA(s). In addition, or alternatively, the AID(s) for enhanced LPMA STA(s) are located at an edge of the AID set within a TIM, a portion of the TIM that may be easily truncated and therefore not sent. The enhanced LPMA STAs and associated access point negotiate unique offset and sleepinterval periods for polling or data uplink by the enhanced LPMA STAs.

Abstract translation: 增强的低功率介质访问（LPMA）处理涉及增强的LPMA STA，其指示关联期间的低功率能力并且被分配AID。 一个或一组增强型LPMA STA的AID包括在与另一组或另一组增强型LPMA STA的AID不同的BEACON间隔期间发送的一个TIM中。 另外或替代地，用于增强的LPMA STA的AID位于TIM内的AID集合的边缘，该TIM的一部分可以容易地被截断，因此不被发送。 增强的LPMA STA和相关联的接入点通过增强的LPMA STA协商轮询或数据上行链路的唯一偏移和休眠间隔周期。

公开(公告)号：US20140119268A1

公开(公告)日：2014-05-01

申请号：US14148047

申请日：2014-01-06

Applicant: STMicroelectronics, Inc.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: H04W74/04 ,  H04W72/04 ,  H04W72/00

CPC classification number: H04W72/0446 ,  H04L12/43 ,  H04W72/005 ,  H04W74/04

Abstract: Methods and apparatus for implementing a robust unicast/broadcast/multicast protocol are provided. In one aspect, a method of avoiding collision of intra-basic service set unicast, broadcast or multicast transmissions notifies stations in the basic service set of a reserved transmit opportunity for a unicast, broadcast or multicast transmission. Transmissions from at least one station in the basic service set are deferred until after the reserved unicast, broadcast or multicast transmit opportunity.

Abstract translation: 提供了用于实现鲁棒的单播/广播/多播协议的方法和装置。 在一个方面，避免基本内部服务设置单播，广播或多播传输的冲突的方法通知用于单播，广播或多播传输的预留发送机会的基本服务集中的站。 基本服务集中的至少一个站的传输延迟到保留的单播，广播或多播发送机会之后。

公开(公告)号：US20140105098A1

公开(公告)日：2014-04-17

申请号：US14050575

申请日：2013-10-10

Applicant: STMICROELECTRONICS, INC.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: H04B7/155

CPC classification number: H04B7/15528 ,  H04W28/065

Abstract: A compressed header format is used for messages transmitted in a wireless network. The compressed header includes a first address field and a frame control field including at least one bit specifying whether the first address is for an access point of the wireless communications network. The frame control field may further include at least one additional bit identifying whether the frame is being relayed by a relay node positioned between the access point and a wireless station. The frame control field may further include at least one further bit identifying whether AID is used for the first address field.

Abstract translation: 压缩报头格式用于在无线网络中发送的消息。 压缩报头包括第一地址字段和帧控制字段，该字段包括指定第一地址是否用于无线通信网络的接入点的至少一个比特。 帧控制字段还可以包括至少一个附加位，标识帧是否被位于接入点和无线站之间的中继节点中继。 帧控制字段还可以包括至少一个识别是否将AID用于第一地址字段的另一位。

公开(公告)号：US20140078949A1

公开(公告)日：2014-03-20

申请号：US14025456

申请日：2013-09-12

Applicant: STMicroelectronics, Inc.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: H04W52/02

CPC classification number: H04W52/0209 ,  H04W52/0219 ,  Y02D70/142

Abstract: An additional cyclic redundancy check (CRC) is inserted in IEEE 802.11 beacon or data frames prior to the end of the frame, at a location following information sufficient for the receiving station to determine whether the frame is from an overlapping basic service set or intended for a different station and to extract other necessary or useful information such as a time of the next full beacon. Upon detecting the CRC, the receiving STA can terminate reception of the frame early to conserve power, and then enter a low power operational mode to further conserve power.

Abstract translation: 在足以使接收站确定帧是否来自重叠的基本业务集或旨在为重叠的基本业务集合的信息之后的位置处，在帧的结尾之前的IEEE 802.11信标或数据帧中插入附加的循环冗余校验（CRC） 一个不同的站，并提取其他必要或有用的信息，如下一个完整信标的时间。 在检测到CRC时，接收STA可以提前终止帧的接收以节省功率，然后进入低功率操作模式以进一步节省功率。

公开(公告)号：US20140029597A1

公开(公告)日：2014-01-30

申请号：US13685341

申请日：2012-11-26

Applicant: STMICROELECTRONICS, INC.

Inventor： Liwen Chu ,  George A. Vlantis

IPC: H04W52/02

CPC classification number: H04W52/0209 ,  H04W8/22 ,  H04W52/0206 ,  H04W52/0216 ,  H04W52/0222 ,  H04W52/0229 ,  H04W84/12 ,  H04W88/02 ,  H04W88/08 ,  Y02D70/00 ,  Y02D70/142

Abstract: A IEEE 802.11 Wireless Local Area Network (WLAN) system of an access point (AP) and one or more stations (STAB) reduces power consumption and increases battery life of power efficient low power STAB by decreasing the amount of time that a power efficient low power STA remains in an awake state. After indicating power efficient low power operation during association with an AP supporting such operation, the power efficient low power STA may enter the doze state from the time that the power efficient low power STA sends a PS-Poll until the power efficient low power STA receives the buffered DATA frame from the AP. While implementing the power efficient PS-Poll method, the AP can send the buffered DATA frame to the STA SIFS after the AP sends an ACK to the received PS-Poll from the STA.

Abstract translation: 接入点（AP）和一个或多个站（STAB）的IEEE 802.11无线局域网（WLAN）系统通过减少功率有效低的时间量来降低功率消耗并增加功率有效的低功率STAB的电池寿命 电源STA保持在唤醒状态。 在与支持这种操作的AP相关联之后指示功率有效的低功率操作之后，功率有效的低功率STA可以从功率有效的低功率STA发送PS-Poll直到功率有效的低功率STA接收到的时候进入打盹状态 来自AP的缓冲的DATA帧。 在实现功率有效的PS-Poll方法时，AP可以在AP从STA发送ACK到接收的PS-Poll之后将缓冲的DATA帧发送到STA SIFS。

公开(公告)号：US20130244592A1

公开(公告)日：2013-09-19

申请号：US13874207

申请日：2013-04-30

Applicant: STMICROELECTRONICS, INC.

Inventor： George A. Vlantis ,  Wendong Hu

IPC: H04B1/40

CPC classification number: H04B1/40 ,  H04B1/28 ,  H04W24/00 ,  H04W74/00 ,  H04W84/10

Abstract: Radio frequency (RF) architectures for spectrum access networks are provided. Embodiments of the invention generally provide a radio frequency (RF) architecture for customer premise equipment (CPE) for use in, for example, IEEE 802.22 wireless regional area networks (WRANs). In some embodiments, the CPE RF architecture includes two receive chains with a directional antenna and an omni-directional antenna, respectively. The CPE RF architecture facilitates opportunistic out-of-band spectrum sensing and WRAN signal receiving that are performed in parallel with data transmission.

Abstract translation: 提供了频谱接入网络的射频（RF）架构。 本发明的实施例通常提供用于在例如IEEE 802.22无线区域网（WRAN）中使用的客户驻地设备（CPE）的射频（RF）架构。 在一些实施例中，CPE RF架构分别包括具有定向天线和全向天线的两个接收链。 CPE RF架构有助于与数据传输并行执行的机会性带外频谱感测和WRAN信号接收。