公开(公告)号：US20050043027A1

公开(公告)日：2005-02-24

申请号：US10645246

申请日：2003-08-21

申请人： Stephen Emeott ,  Ye Chen ,  Nattavut Smavatkul

发明人： Stephen Emeott ,  Ye Chen ,  Nattavut Smavatkul

IPC分类号： H04L12/28 ,  H04L12/56 ,  H04W52/02 ,  H04W84/12 ,  H04Q7/20

CPC分类号： H04W52/0229 ,  H04W74/08 ,  H04W84/12 ,  Y02D70/142 ,  Y02D70/22 ,  Y02D70/23

摘要： An access point (11) for a wireless local area network (10) transmits a beacon message during a service interval period (21). This beacon message identifies, in a preferred embodiment, those subscriber units to whom the access point will shortly be transmitting data. Subscriber units that are not identified in the beacon message and that do not have data themselves to transmit to the access point can implement a power conservation mode of operation until the next beacon message. Subscriber units that have data, such as voice information, to transmit can utilize the beacon message contents to at least estimate a likely time by when the access point will have concluded making its transmissions to the subscriber units. That estimated time can then be used to facilitate scheduling a time at which a given subscriber unit will contend for an opportunity to transmit its data to the access point. In a preferred embodiment, this scheduled transmission time can potentially occur either during a contention window that follows the service interval period or during a dynamic contention window that follows the transmissions of the access point and concludes with the conclusion of the service interval period. Subscriber units can then use intervening periods of time to effect their power conservation schemes of choice.

摘要翻译： 无线局域网（10）的接入点（11）在服务间隔期间（21）中发送信标消息。 该信标消息在优选实施例中标识接入点将不久正在向其发送数据的那些用户单元。 在信标消息中未被识别并且没有数据本身发送到接入点的用户单元可以实现功率节省模式，直到下一个信标消息。 具有数据（例如语音信息）要发送的订户单元可以利用信标消息内容来至少估计可能的时间，当接入点将已经结束向用户单元发送信号时。 然后可以使用该估计时间来方便调度给定用户单元将竞争机会将其数据发送到接入点的时间。 在优选实施例中，该调度的传输时间可能潜在地在遵循服务间隔周期的竞争窗口期间或者在接入点的传输之后的动态争用窗口期间出现，并以服务间隔周期的结论结束。 用户单位然后可以使用中间时间来实现其选择的节能方案。

公开(公告)号：US20050190738A1

公开(公告)日：2005-09-01

申请号：US10789528

申请日：2004-02-26

申请人： Nattavut Smavatkul ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson ,  Huai Wang

发明人： Nattavut Smavatkul ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson ,  Huai Wang

IPC分类号： H04J3/16 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04W74/06 ,  H04W84/12 ,  Y02D70/142

摘要： A mobile terminal (302, 304) wakes up from a low power state and initiates a frame exchange in a wireless local area network that supports voice traffic by transmitting a polling frame (602). If the mobile terminal had voice data to send, it is included in the polling frame. In response to receiving the polling frame, the access point transmits a delay frame (604) to acknowledge receipt of the polling frame. If the access point has data for the polling mobile terminal, it transmits a non-delay frame (606) including the voice data, otherwise it transmits a null frame (702). The mobile terminal acknowledges the data from the access point (608), and goes back to sleep until the beginning of the next service interval.

摘要翻译： 移动终端（302,304）从低功率状态唤醒，并通过发送轮询帧（602）在支持话音业务的无线局域网中发起帧交换。 如果移动终端具有要发送的语音数据，则它被包括在轮询帧中。 响应于接收到轮询帧，接入点发送延迟帧（604）以确认轮询帧的接收。 如果接入点具有轮询移动终端的数据，则它发送包括语音数据的非延迟帧（606），否则发送空帧（702）。 移动终端从接入点（608）确认数据，并返回睡眠直到下一个服务间隔的开始。

公开(公告)号：US20050136833A1

公开(公告)日：2005-06-23

申请号：US10741651

申请日：2003-12-19

申请人： Stephen Emeott ,  Ye Chen ,  Floyd Simpson ,  Huai Wang ,  Timothy Wilson ,  Nattavut Smavatkul

发明人： Stephen Emeott ,  Ye Chen ,  Floyd Simpson ,  Huai Wang ,  Timothy Wilson ,  Nattavut Smavatkul

IPC分类号： G08C17/00 ,  H04B7/15 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04W52/0225 ,  H04W28/14 ,  H04W74/06 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/142 ,  Y02D70/23

摘要： A mobile station (106) establishes a real time communication link via an access point (102) for carrying voice or other time-sensitive data. A WLAN subsystem (204) of the mobile station is normally kept in a low power state. Upon initiating a communication link the mobile station signals to the access point that unscheduled power save delivery mode will be used (614), and the access point reserves resources to assure the necessary quality of service. The mobile station initiates a frame transaction by first powering up the WLAN subsystem (712), acquiring the WLAN channel (407), and transmitting a polling frame. Upon successful receipt of the polling frame the access point prepares to reply with an aggregate response. The aggregate response commences by transmitting all data in an aggregate buffer, including both reserved and unreserved data buffers. Upon successful receipt of the aggregate response, the mobile station places the WLAN subsystem back into a low power state.

摘要翻译： 移动台（106）经由用于承载语音或其他时间敏感数据的接入点（102）建立实时通信链路。 移动台的WLAN子系统（204）通常保持在低功率状态。 在发起通信链路时，移动站向接入点发信号通知将使用不定期的节电传送模式（614），并且接入点保留资源以确保必要的服务质量。 移动台通过首先加电WLAN子系统（712），获取WLAN信道（407）并发送轮询帧来发起帧事务。 在成功接收到轮询帧之后，接入点准备用总的响应进行回复。 通过传输聚合缓冲区中的所有数据（包括保留数据缓冲区和未保留的数据缓冲区）开始聚合响应。 在成功接收到总响应后，移动台将WLAN子系统置于低功率状态。

公开(公告)号：US20060209763A1

公开(公告)日：2006-09-21

申请号：US11085502

申请日：2005-03-21

申请人： Stephen Emeott ,  Anthony Braskich ,  Nattavut Smavatkul

发明人： Stephen Emeott ,  Anthony Braskich ,  Nattavut Smavatkul

IPC分类号： H04Q7/00

CPC分类号： H04W28/22 ,  H04L1/0002 ,  H04L1/16 ,  H04W24/00 ,  H04W88/06

摘要： Multi-mode link adaptation in a wireless communication network where a station calculates a current link quality, a minimum link quality, and an excess link quality based upon the current link quality and the minimum link quality to determine an operating mode that is related to the success or failure of recent transmissions from the station. If the calculated excess link margin is lower than a first threshold, the station operates in a first mode, otherwise in another mode. In any case, the station selects the link rate for a new transmission from the station based upon the selected mode.

摘要翻译： 在无线通信网络中的多模式链路自适应，其中站基于当前链路质量和最小链路质量来计算当前链路质量，最小链路质量和超链路质量，以确定与 来自车站的最近传输的成功或失败。 如果计算的超额链路余量低于第一阈值，则站以第一模式操作，否则在另一模式中操作。 在任何情况下，站基于所选择的模式从站点选择用于新传输的链路速率。

公开(公告)号：US20050249227A1

公开(公告)日：2005-11-10

申请号：US10841778

申请日：2004-05-07

申请人： Huai Wang ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson

发明人： Huai Wang ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson

IPC分类号： H04B7/212 ,  H04L12/28 ,  H04L12/56

CPC分类号： H04L47/33 ,  H04L47/10 ,  H04L47/14 ,  H04L47/2416 ,  H04L47/30 ,  H04W28/14 ,  H04W52/0232 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/142 ,  Y02D70/23

摘要： A wireless local area network (WLAN) includes an access point (102) and a mobile station (106). The mobile station can operate in a low power mode by shutting down a WLAN subsystem (204) of the mobile station. While the mobile station is in a low power mode, the access point buffers data received at the access point destined for the mobile station (706). The mobile station wakes up to initiate a service period by transmitting a trigger frame to the access point, and identifies a traffic stream to be serviced in the presently initiated service period. The access point begins transmitting response frames to the mobile station, identifying the traffic stream requested by the mobile station, and in at least one response frame, the access point may indicate the buffer status of another traffic stream associated with the mobile station to allow the mobile station to make decisions regarding data retrieval and power save state.

摘要翻译： 无线局域网（WLAN）包括接入点（102）和移动站（106）。 通过关闭移动台的WLAN子系统（204），移动台可以以低功率模式工作。 当移动站处于低功率模式时，接入点缓存在去往移动台的接入点接收的数据（706）。 移动台通过向接入点发送触发帧来唤醒起始服务周期，并且识别当前发起的服务周期中待服务的业务流。 接入点开始向移动台发送响应帧，识别移动台请求的业务流，并且在至少一个响应帧中，接入点可以指示与移动台相关联的另一业务流的缓冲状态，以允许 移动台做出关于数据检索和省电状态的决定。

公开(公告)号：US20050135302A1

公开(公告)日：2005-06-23

申请号：US10741659

申请日：2003-12-19

申请人： Huai Wang ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson ,  Timothy Wilson

发明人： Huai Wang ,  Ye Chen ,  Stephen Emeott ,  Floyd Simpson ,  Timothy Wilson

IPC分类号： H04B7/005 ,  H04J3/16 ,  H04W52/02 ,  H04Q7/00

CPC分类号： H04W52/0216 ,  Y02D70/142 ,  Y02D70/23

摘要： A mobile station establishes a schedule by which data is exchanged with an access point. The schedule allows the mobile station to use a low power mode at times outside of the scheduled service periods. However, the mobile station may occasionally need to retrieve additional data from the access point, or transmit additional data to the access point, and so initiates an unscheduled service period to do so.

公开(公告)号：US20070242634A1

公开(公告)日：2007-10-18

申请号：US11379081

申请日：2006-04-18

申请人： George Calcev ,  Stephen Emeott ,  Hrishikesh Gossain

发明人： George Calcev ,  Stephen Emeott ,  Hrishikesh Gossain

IPC分类号： H04B7/185

CPC分类号： H04W52/0225 ,  H04W4/06 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/22

摘要： The proposed method and apparatus reduces an amount of power required for nodes to both transmit and receive messages. In particular, broadcast packets are sent in an awake period (ATIM window) if the length of these messages is small. Because these packets do not need acknowledgment or they do not expect immediate reply, they may be broadcast in the ATIM window. Since all nodes are awake during the ATIM window, nodes may receive messages during this period of time which they ordinarily would need to stay awake to receive in the sleep period (post ATIM window).

摘要翻译： 所提出的方法和装置减少了节点发送和接收消息所需的功率量。 特别地，如果这些消息的长度较小，则在清醒周期（ATIM窗口）中发送广播分组。 由于这些数据包不需要确认或者不希望立即回复，所以可以在ATIM窗口中进行广播。 由于所有节点在ATIM窗口期间都处于唤醒状态，所以节点可能会在这段时间内接收消息，通常在休眠期间（ATIM窗口）通常需要保持唤醒状态。

公开(公告)号：US20070162751A1

公开(公告)日：2007-07-12

申请号：US11273421

申请日：2005-11-14

申请人： Anthony Braskich ,  Stephen Emeott

发明人： Anthony Braskich ,  Stephen Emeott

IPC分类号： H04L9/00

CPC分类号： H04L9/3273 ,  H04L63/062 ,  H04L63/0869 ,  H04L63/126

摘要： A method and apparatus for mutual authentication of a first and a second node is provided herein. During operation the first node sends a first authentication message to the second node comprising information needed for the second node to authenticate the first node and information needed by the second node for the second node to be authenticated by the first node. A second authentication message is received from the second node comprising information needed by the first node for the first node to be authenticated by the second node and information needed for the first node to authenticate the second node. Because the first and the second authentication messages comprise information needed for both the first and the second node to authenticate each other, messaging within the network is greatly reduced.

摘要翻译： 本文提供了用于第一和第二节点的相互认证的方法和装置。 在操作期间，第一节点向第二节点发送包括第二节点认证第一节点所需的信息的第一认证消息，以及由第一节点认证的第二节点需要的信息。 从第二节点接收到第二认证消息，其包括第一节点为第二节点要认证的第一节点所需的信息和第一节点认证第二节点所需的信息。 因为第一和第二认证消息包括第一和第二节点彼此认证所需的信息，所以在网络内的消息传送被大大减少。

公开(公告)号：US20050138451A1

公开(公告)日：2005-06-23

申请号：US10741654

申请日：2003-12-19

申请人： Floyd Simpson ,  Stephen Emeott ,  Timothy Wilson

发明人： Floyd Simpson ,  Stephen Emeott ,  Timothy Wilson

IPC分类号： G06F1/32 ,  H04L12/28 ,  H04L12/56 ,  H04W28/14 ,  H04W52/02 ,  H04W74/00 ,  H04W74/06 ,  H04W84/12 ,  H04W88/08

CPC分类号： H04W52/0225 ,  H04W28/14 ,  H04W74/00 ,  H04W74/06 ,  H04W84/12 ,  H04W88/08 ,  Y02D70/142 ,  Y02D70/23

摘要： A mobile station (106) establishes a real time communication link via an access point (102) for carrying voice or other time-sensitive data. A WLAN subsystem (204) of the mobile station is normally kept in a low power state. Upon initiating a communication link the mobile station signals to the access point that uplink poll-based power save delivery mode will be used (614), and the access point reserves resources to assure the necessary quality of service. The mobile station initiates a frame transaction by first powering up the WLAN subsystem (712), acquiring the WLAN channel (407), and transmitting a polling frame. Upon successful receipt of the polling frame the access point prepares to reply with a response frame at an unspecified time within service window, during which time the mobile station maintains the WLAN subsystem power up and ready to receive the response frame. Upon successful receipt of the response frame, the mobile station places the WLAN subsystem back into a low power state.

摘要翻译： 移动台（106）经由用于承载语音或其他时间敏感数据的接入点（102）建立实时通信链路。 移动台的WLAN子系统（204）通常保持在低功率状态。 在发起通信链路时，移动站向接入点发信号通知将使用基于上行链路轮询的节电传送模式（614），接入点保留资源以确保必要的服务质量。 移动台通过首先加电WLAN子系统（712），获取WLAN信道（407）并发送轮询帧来发起帧事务。 在成功接收到轮询帧之后，接入点准备在服务窗口内的未指定时间用响应帧进行应答，在此期间移动台维持WLAN子系统加电并准备好接收响应帧。 在成功接收到响应帧之后，移动台将WLAN子系统置于低功率状态。

公开(公告)号：US20070223701A1

公开(公告)日：2007-09-27

申请号：US11275795

申请日：2006-01-30

申请人： Stephen Emeott ,  Anthony Braskich

发明人： Stephen Emeott ,  Anthony Braskich

IPC分类号： H04K1/00

CPC分类号： H04L63/065 ,  H04L63/104

摘要： A method and apparatus for utilizing multiple group keys for secure communications among nodes is provided herein. During operation an access point will utilize a plurality of Medium Access Controller (MAC) Addresses, one for each service provided. Each MAC address has an associated lookup table containing encryption keys. From the perspective of nodes using a first service, group traffic sent using the MAC address for the second service is ignored, and no decryption attempt is made. Likewise, group traffic sent using the MAC address for the first service is ignored for group traffic using the second service.

摘要翻译： 本文提供了一种利用多组密钥进行节点之间的安全通信的方法和装置。 在操作期间，接入点将利用多个媒体接入控制器（MAC）地址，每个服务提供一个。 每个MAC地址具有包含加密密钥的关联查找表。 从使用第一服务的节点的角度来看，忽略使用第二服务的MAC地址发送的群组流量，并且不进行解密尝试。 同样，使用第二个服务的组通信将忽略使用第一个服务的MAC地址发送的组流量。