公开(公告)号：WO2005029777A1

公开(公告)日：2005-03-31

申请号：PCT/IB2004/051801

申请日：2004-09-20

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  DEL PRADO PAVON, Javier ,  SOOMRO, Amjad ,  NANDAGOPALAN, Saishankar ,  MANGOLD, Stefan ,  ZHONG, Zhun

Inventor： DEL PRADO PAVON, Javier ,  SOOMRO, Amjad ,  NANDAGOPALAN, Saishankar ,  MANGOLD, Stefan ,  ZHONG, Zhun

IPC: H04L12/28

CPC classification number: H04W56/00 ,  H04W72/12

Abstract: A plurality of methods, computer program product, and apparatus that use a lower 32 bit field of a 64-bit 802.11 TSF timer, so as to encode the reference time instant without the ambiguity as to whether there the reference time is referring to a future time or a past time. According to an aspect of the present invention, the fact that the low order 32 bits of the TSF timer wraps over in about 71 minutes is exploited to remove any ambiguity in the reference times contained in the Schedule Element frame. One method employs an algorithm base on distance between two reference points to determine whether the timer has wrapped around a time period, and another method uses a delay interval or a timeout to determine whether or not the TSF timer is wrapped or unwrapped. Another method includes determining whether an absolute value of X-O is less than, or greater than or equal to maximum value M/2.

Abstract translation: 使用64位802.11 TSF定时器的低32位字段的多种方法，计算机程序产品和装置，以便对参考时刻进行编码，而不存在关于参考时间是指未来的歧义 时间或过去的时间。 根据本发明的一个方面，利用了大约71分钟内TSF定时器的低阶32位包裹的事实来消除包含在时间表元素帧中的参考时间中的任何歧义。 一种方法采用基于两个参考点之间的距离的算法来确定定时器是否已经缠绕了一段时间，另一种方法使用延迟间隔或超时来确定TSF定时器是否被包装或解包。 另一方法包括确定X-O的绝对值是否小于或大于或等于最大值M / 2。

公开(公告)号：WO2004100451A1

公开(公告)日：2004-11-18

申请号：PCT/IB2004/001509

申请日：2004-05-03

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  SOOMRO, Amjad ,  ZHONG, Zhun ,  MANGOLD, Stefan

Inventor： SOOMRO, Amjad ,  ZHONG, Zhun ,  MANGOLD, Stefan

IPC: H04L12/28

CPC classification number: H04W24/10 ,  H04W84/12 ,  H04W84/18

Abstract: The present invention relates to specification of the start time for taking measurements in wireless local area networks (WLAN), in which the start time of measurements to be taken is included in a Measurement Start Time field of a Measurement Request Frame and the interpretation of the start time for a specific measured element is determined by a Mode field included in each Measurement Request Element field of the Measurement Request Frame. Optionally, the start time of a Measurement Request Frame is specified using a time synchronization function (TSF) timer value or part thereof in order to avoid ambiguities in interpretation of the start time reported.

Abstract translation: 本发明涉及用于在无线局域网（WLAN）中进行测量的开始时间的规范，其中待测量的开始时间被包括在测量请求帧的测量开始时间字段中，并且解释 特定测量元素的开始时间由测量请求帧的每个测量请求元素字段中包括的模式字段确定。 可选地，使用时间同步功能（TSF）定时器值或其一部分来指定测量请求帧的开始时间，以避免解释所报告的开始时间的模糊性。

公开(公告)号：WO2004077747A1

公开(公告)日：2004-09-10

申请号：PCT/IB2004/000469

申请日：2004-02-23

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  CHOU, Chun-Ting ,  ZHONG, Zhun

Inventor： CHOU, Chun-Ting ,  ZHONG, Zhun

IPC: H04L12/28

CPC classification number: H04W36/14 ,  H04W36/0011 ,  H04W36/0016 ,  H04W36/02 ,  H04W36/12 ,  H04W40/36 ,  H04W80/04 ,  H04W92/02 ,  H04W92/20

Abstract: Under the present invention, a method and system for improved handoff of a mobile device between wireless subnetworks is provided. Specifically, under the present invention, a mobile device will directly associate with a new access point of a new wireless subnetwork (layer 2 handoff) before associating with a agent of the new subnetwork (layer 3 handoff). Once the association with the new access point is complete, a forwarding request will be sent from the new access point to the old access point of the wireless subnetwork wit which the mobile device was previously associated. The forwarding request causes all data packets intended for the mobile device that are received by the old access point to be forwarded to the new access point. Then, once the mobile device has the completed its association with the agent of the new wireless subnetwork, the mobile device will receive data packets directly through the new subnetwork.

Abstract translation: 在本发明中，提供了一种用于在无线子网之间改进移动设备切换的方法和系统。 具体地说，在本发明中，移动设备在与新的子网络（第3层切换）的代理关联之前将直接与新的无线子网（第2层切换）的新接入点相关联。 一旦与新接入点的关联完成，转发请求将从新接入点发送到移动设备先前关联的无线子网的旧接入点。 转发请求使得由旧接入点接收的用于移动设备的所有数据分组转发到新的接入点。 然后，一旦移动设备已经完成与新的无线子网络的代理的关联，移动设备将直接通过新的子网络接收数据分组。

公开(公告)号：WO2004054283A2

公开(公告)日：2004-06-24

申请号：PCT/IB2003/005517

申请日：2003-11-27

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  ZHONG, Zhun

Inventor： ZHONG, Zhun

IPC: H04Q7/00

CPC classification number: H04W36/0061 ,  H04W36/0083 ,  H04W36/0088 ,  H04W40/248

Abstract: Disclosed is a system and method for performing a fast channel scan so as to minimize the communication disruption period (10) which occurs during a handoff of a mobile station (STA) (20-23) in a wireless local area network (WLAN) (100). Each mobile station (STA) includes an associated nearest-neighbor table identifying nearest-neighbor APs (14-16) in the network to the AP with which the STA is currently associated. When a STA (20-23) performs a handoff, its nearest-neighbor table is used to perform a prioritized search of those channels of operation included in the table belonging to nearest-neighbor APs (14-16). In this manner, by prioritizing the search to first search the channels of operation belonging to nearest-neighbor APs (14-16), there is a greater likelihood of locating a candidate ap (14-16) to form an association with in less time as compared with the prior art search method of blindly searching each and every operating channel in the network.

Abstract translation: 公开了一种用于执行快速信道扫描以便最小化在无线局域网（WLAN）中的移动站（STA）（20-23）的切换期间发生的通信中断周期（10）的系统和方法（ 100）。 每个移动站（STA）包括识别网络中当前与该STA当前相关联的AP的最近邻近AP（14-16）的相关联的最近邻表。 当STA（20-23）执行切换时，其最近邻表用于执行属于最近邻AP（14-16）的表中包括的那些操作信道的优先搜索。 以这种方式，通过优先搜索来首先搜索属于最近邻AP（14-16）的操作信道，存在将候选ap（14-16）定位成更少时间的关联的可能性较大 与盲网搜索网络中的每个操作信道的现有技术搜索方法相比。

公开(公告)号：WO2003034745A2

公开(公告)日：2003-04-24

申请号：PCT/IB2002/004226

申请日：2002-10-14

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： CHEN, Yingwei ,  PENG, Shaomin ,  LAN, Tse-Hua ,  ZHONG, Zhun

IPC: H04N7/46

CPC classification number: H04N19/577 ,  H04N19/132 ,  H04N19/139 ,  H04N19/157 ,  H04N19/159 ,  H04N19/17 ,  H04N19/172 ,  H04N19/23 ,  H04N19/46 ,  H04N19/587

Abstract: A system and method that reduces computational complexity of a decoder by identifying a skippable region in anoverlaid area. The invention provides a system for processing encoded video data, comprising: an analysis system that determines if a current video frame having an overlaid area acts as a reference for future video frames; and a system for identifying a skippable region in the overlaid area. The invention may also include a system for identifying a portion of the overlaid area as the skippable based on analysis of motion vectors or motion vector ranges.

Abstract translation: 通过识别重叠区域中的可跳过区域来降低解码器的计算复杂度的系统和方法。 本发明提供了一种用于处理编码视频数据的系统，包括：分析系统，其确定具有覆盖区域的当前视频帧是否充当未来视频帧的参考; 以及用于识别重叠区域中的可跳过区域的系统。 本发明还可以包括用于基于运动矢量或运动矢量范围的分析来识别重叠区域的一部分为可跳过的系统。

公开(公告)号：WO2003010974A1

公开(公告)日：2003-02-06

申请号：PCT/IB2002/002545

申请日：2002-06-25

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： LAN, Tse-Hua ,  ZHONG, Zhun

IPC: H04N7/50

CPC classification number: H04N19/428 ,  H04N19/423 ,  H04N19/61

Abstract: The present invention is directed to decoding a video bitstream at a first resolution where embedded resizing is used in conjunction with external scaling in order to reduce the computational complexity of the decoding. According to the present invention, residual error frames are produced at a second lower resolution. Motion compensated frames are produced also at the second lower resolution. The residual error frames are then combined with the motion compensated frames to produce video frames. Further, the video frames are up-scaled to the first resolution.

Abstract translation: 本发明涉及以第一分辨率对视频比特流进行解码，其中嵌入式大小调整与外部缩放结合使用，以便降低解码的计算复杂性。 根据本发明，以第二较低分辨率产生残差错误帧。 运动补偿帧也以第二较低分辨率产生。 然后将剩余误差帧与运动补偿帧组合以产生视频帧。 此外，视频帧被扩展到第一分辨率。

公开(公告)号：WO2003005729A1

公开(公告)日：2003-01-16

申请号：PCT/IB2002/002583

申请日：2002-06-28

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V.

Inventor： PENG, Shaomin ,  VAN ZON, Cornelis, C., A., M. ,  ZHONG, Zhun

IPC: H04N7/26

CPC classification number: H04N21/454 ,  H04N19/127 ,  H04N19/156 ,  H04N19/42 ,  H04N19/423 ,  H04N19/61 ,  H04N19/90 ,  H04N21/25808 ,  H04N21/2662 ,  H04N21/4402 ,  H04N21/4424 ,  H04N21/4516

Abstract: A complexity scalable decoder system and method. The system comprises: a decoder having a plurality of functional blocks for decoding compressed video data, the decoder further includes a plurality of scalable functions for selectively reducing a complexity of at least one of the functional blocks; and a local resource controller for generating a scaling strategy for the decoder, wherein the scaling strategy is selected in response to a complexity requirement received from a system resource manager, and wherein the scaling strategy is selected from a plurality of predetermined scaling strategies available to the local resource controller. Each of the predetermined scaling strategies may be selected from a look-up table designed off-line.

Abstract translation: 一种复杂度可扩展的解码系统和方法。 该系统包括：具有用于解码压缩视频数据的多个功能块的解码器，解码器还包括多个可缩放功能，用于选择性地降低至少一个功能块的复杂度; 以及本地资源控制器，用于为解码器生成缩放策略，其中响应于从系统资源管理器接收的复杂度要求来选择缩放策略，并且其中缩放策略是从多个可用于 本地资源控制器。 可以从离线设计的查找表中选择每个预定的缩放策略。

公开(公告)号：WO2005036823A3

公开(公告)日：2005-04-21

申请号：PCT/IB2004/052072

申请日：2004-10-12

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHONG, Zhun ,  MANGOLD, Stefan

Inventor： ZHONG, Zhun ,  MANGOLD, Stefan

IPC: H04L12/28

Abstract: A Medium Sensing Time Histogram Table structure is provided for inclusion in a Management Information Base (MIB) for storing and accessing Medium Sensing Time Histogram measurement results, such as Medium Sensing Time Histogram Measurement Reports. A predetermined number of entries may be provided in the Medium Sensing Time Histogram Report Table for this purpose. An apparatus and method is provided for a wireless device to enter and access entries in the Medium Sensing Time Histogram Report Table. The method and apparatus is intended for use in the IEEE 802.11k standard as well as any WLAN requiring measurement of the medium.

公开(公告)号：WO2005006785A2

公开(公告)日：2005-01-20

申请号：PCT/IB2004/051211

申请日：2004-07-13

Applicant: KONINKLIJKE PHILIPS ELECTRONICS, N.V. ,  ZHONG, Zhun

Inventor： ZHONG, Zhun

IPC: H04Q7/00

CPC classification number: H04W74/0808 ,  H04W36/08 ,  H04W72/12 ,  H04W74/008 ,  H04W74/0816 ,  H04W74/0833 ,  H04W84/12 ,  H04W88/08

Abstract: A method for fast active scanning and an Access Point apparatus that reduces the delay in convention active scanning. The method includes the step of giving an AP higher priority to transmit a probe response than is currently known. This priority comes at the delay of transmission of the probe response, so preferably the probe response can be delayed by just the time that the AP needs to prepare the response plus the time, if any, for the frame already in the air to finish. According to the invention, a method can include steps for: sending a uni-cast probe request message by an (STA) 238, 248, 268 on a particular channel having at least one Access Point (AP) 258, 278 in communication therewith; receiving by one particular (AP) 278 the probe request message sent by the (STA); sensing by the particular (AP) 278 of a point coordination function (PCF) interframe space (PIFS) 325 of the particular channel; and sending by the particular (AP) 278 of a probe response message to the (STA) 238 in response to the probe request message after the PIFS. As the probe request is uni-cast, there is no need for a backoff interval as only one AP will respond. Since normal traffic utilizes the longer DIFS space plus backoffs to avoid collisions, the AP will always be able to respond to a probe request of scan faster than other items can respond on the channel, thus giving the AP priority when sending the probe response message.

Abstract translation: 用于快速主动扫描的方法和减少常规主动扫描中的延迟的接入点装置。 该方法包括给予比当前已知的AP更高的优先级来发送探测响应的步骤。 这个优先级是在传输探测响应的延迟时间，所以优选地，探测响应可以延迟到AP需要准备响应的时间加上已经在空中的帧完成的时间（如果有的话）。 根据本发明，一种方法可以包括以下步骤：由（STA）238,248,268在具有与其通信的至少一个接入点（AP）258,278的特定信道上发送单播探测请求消息; 由一个特定（AP）278接收（STA）发送的探测请求消息; 由具体（AP）278感测特定信道的点协调功能（PCF）帧间间隔（PIFS）325; 以及响应于PIFS之后的探测请求消息，特定（AP）278将探测响应消息发送到（STA）238。 由于探测请求是单播的，因为只有一个AP将响应，所以不需要退避间隔。 由于正常流量利用较长的DIFS空间加上回退来避免冲突，因此AP始终能够以比其他项目能够在该通道上作出响应更快的速度响应探测请求，从而在发送探测响应消息时赋予AP优先级。

公开(公告)号：WO2004098108A2

公开(公告)日：2004-11-11

申请号：PCT/IB2004/001304

申请日：2004-04-22

Applicant: KONINKLIJKE PHILIPS ELECTRONICS N.V. ,  ZHONG, Zhun ,  SOOMRO, Amjad ,  MANGOLD, Stefan

Inventor： ZHONG, Zhun ,  SOOMRO, Amjad ,  MANGOLD, Stefan

IPC: H04L

CPC classification number: H04W36/18 ,  H04W36/08 ,  H04W36/22 ,  H04W60/06 ,  H04W76/34 ,  H04W84/12 ,  H04W88/08

Abstract: A plurality of methods, apparatus and computer program for providing warning to a station (STA) associated with an Access Point (AP) in a WLAN that a disassociation the AP is imminent. The steps include (a) selecting a station (STA) for disassociation from a particular Access Point (AP) of a WLAN; (b) by updating a newly created reason code field of a message to indicate to the selected STA that it has become a candidate for disassociation; and (c) transmitting the message to the selected STA. Upon receipt by the STA of a message indicating that the selected STA has become a candidate for disassociation, the selected station scans other Access Points from a list to find another Access Point to associate with before being cut off by the current Access Point.

Abstract translation: 用于向与WLAN中的接入点（AP）相关联的站（STA）提供警告的多个方法，装置和计算机程序，其指示AP即将关闭。 所述方法之一的步骤包括：（a）从WLAN的特定接入点（AP）中选择用于取消关联的站（STA）; （b）更新消息的原因代码字段（即，测量请求帧或站点报告响应消息），以向所选择的STA指示其已经成为用于解除关联的候选者; 和（c）将消息发送到所选择的STA。 当STA接收到指示所选择的STA已经成为用于解除关联的候选者的消息时，所选择的站从列表中扫描其他接入点，以在由当前接入点切断之前找到要关联的另一个接入点，并且被 最终从当前转移到另一个（选定）接入点。