公开(公告)号：WO0239750A3

公开(公告)日：2002-09-19

申请号：PCT/EP0112902

申请日：2001-11-02

Applicant: KONINKL PHILIPS ELECTRONICS NV

Inventor： PENG SHAOMIN ,  ZHONG ZHUN

IPC: G06T9/00 ,  H04N7/26 ,  H04N7/46 ,  H04N7/50

CPC classification number: H04N19/577 ,  H04N19/156 ,  H04N19/42 ,  H04N19/61 ,  H04N19/90

Abstract: A system and method for scaling an MPEG-2 video decoder subject to a resource constraint. A decoder system is provided for decoding compressed video data arranged in a group of pictures, wherein the group of pictures include I pictures, P pictures and B pictures. The system comprises a processing path for decoding an error residual associated with the group of pictures, and a filtering system for preventing the error residual associated with B pictures from being decoded by the processing path. The decoder system may further comprise a system for selectively enabling the filtering system for B pictures having a DC coefficient that is below a predetermined threshold.

Abstract translation: 用于缩放受资源约束的MPEG-2视频解码器的系统和方法。 解码器系统被提供用于解码排列在一组图像中的压缩视频数据，其中图像组包括I图像，P图像和B图像。 该系统包括用于解码与该组图像相关联的错误残差的处理路径，以及用于防止与B图像相关联的错误残差被处理路径解码的滤波系统。 解码器系统还可以包括用于选择性地使能具有低于预定阈值的DC系数的B图像的滤波系统的系统。

公开(公告)号：WO2004077719A3

公开(公告)日：2004-11-04

申请号：PCT/IB2004000521

申请日：2004-02-23

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  CHOU CHUN-TING ,  ZHONG ZHUN

Inventor： CHOU CHUN-TING ,  ZHONG ZHUN

IPC: H04L1/00 ,  H04L1/18 ,  H04L12/28 ,  H04L12/56 ,  H04W28/04 ,  H04W36/02 ,  H04W36/08 ,  H04W80/06 ,  H04Q7/38

CPC classification number: H04W36/02 ,  H04L1/1835 ,  H04L1/1841 ,  H04L69/16 ,  H04L2001/0093 ,  H04W80/06

Abstract: Under the present invention, a wireless component such as an access point or a mobile device is configured to manage the buffering of newly transmitted TCP packets. Specifically, the wireless component can receive both forwarded TCP packets and newly transmitted TCP packets. If a set of newly transmitted TCP packets is received out of order (i.e., before a set of previously transmitted TCP packets that must be forwarded), one out of order (newly transmitted) TCP packet will be passed for each of a quantity of tokens present on the wireless component. Each out of order TCP packet that is not passed will be buffered. Once a previously requested forwarded TCP packet is received and passed, the quantity of tokens is restored to a predetermined quantity, and a commensurate number of buffered TCP packets can be passed.

Abstract translation: 在本发明中，诸如接入点或移动设备之类的无线组件被配置为管理对新传输的TCP分组的缓冲。 具体而言，无线组件可以接收转发的TCP分组和新发送的TCP分组。 如果一组新传输的TCP分组被无序地接收到（即，在一组先前传送的TCP分组必须被转发之前），则一个无序（新传送的）TCP分组将针对每一个令牌 呈现在无线组件上。 每个不通过的TCP数据包将被缓冲。 一旦先前请求转发的TCP数据包被接收并通过，令牌的数量恢复到预定数量，并且可以传递相应数量的缓冲的TCP数据包。

公开(公告)号：WO02080569A3

公开(公告)日：2002-12-05

申请号：PCT/IB0201000

申请日：2002-03-26

Applicant: KONINKL PHILIPS ELECTRONICS NV

Inventor： LAN TSE-HUA ,  ZHONG ZHUN ,  CHEN YINGWEI

IPC: H04N7/30 ,  H03M7/30 ,  H04N7/26 ,  H04N7/50

CPC classification number: H04N19/625 ,  H04N19/122 ,  H04N19/126 ,  H04N19/132 ,  H04N19/137 ,  H04N19/156 ,  H04N19/176 ,  H04N19/18 ,  H04N19/44 ,  H04N19/59 ,  H04N19/61 ,  H04N19/90

Abstract: Data compressed according to a lossy DCT-based algorithm, such as the MPEG or MPEG2 algorithms, is decompressed according to a dynamically-selected set of DCT coefficients, with unused coefficients masked out. A macroblock of the data exhibiting little motion is decompressed with a small subset of DCT coefficients, while a macroblock exhibiting more motion is decompressed using a larger subset of DCT coefficients up the full set of DCT coefficients. Average computational complexity is thus kept low, enabling the use of inexpensive equipment, while degradation is minimized.

Abstract translation: 根据基于有损DCT的算法（例如MPEG或MPEG2算法）压缩的数据根据​​动态选择的一组DCT系数进行解压缩，其中未使用的系数被屏蔽掉。 使用DCT系数的小子集来解压缩出少量运动的数据的宏块，而使用DCT系数的全部DCT系数的较大子集来解压缩展现更多运动的宏块。 因此，平均计算复杂度保持较低，使得能够使用便宜的设备，同时降低最小化。

公开(公告)号：WO2004054283A3

公开(公告)日：2004-12-29

申请号：PCT/IB0305517

申请日：2003-11-27

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  ZHONG ZHUN

Inventor： ZHONG ZHUN

IPC: H04L12/28 ,  H04L12/56 ,  H04W36/08 ,  H04W36/36 ,  H04W40/24 ,  H04W48/12 ,  H04W84/12

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.

公开(公告)号：WO0251161A2

公开(公告)日：2002-06-27

申请号：PCT/IB0102316

申请日：2001-12-05

Applicant: KONINKL PHILIPS ELECTRONICS NV

Inventor： CHEN YI ,  ZHONG ZHUN

IPC: H04N7/32 ,  H03M7/30 ,  H04N7/26 ,  H04N7/46 ,  H04N7/50

CPC classification number: H04N19/577 ,  H04N19/156 ,  H04N19/157 ,  H04N19/172 ,  H04N19/423 ,  H04N19/428 ,  H04N19/61 ,  H04N19/90

Abstract: The present invention is directed to frame-type dependent (FTD) processing in which a different type of processing (including scaling) is performed according to the types (I, B, or P) of pictures or frames being processed. The basis for FTD processing is that errors in B pictures do not propagate to other pictures since decoded B pictures are not used as anchors for the other type of pictures. In other words, since I or P pictures do not depend on B pictures, any errors in a B picture are not spread to any other pictures. Therefore, the present invention puts more memory and processing power to pictures that are most critical to overall video quality.

Abstract translation: 本发明涉及根据正在处理的图像或帧的类型（I，B或P）执行不同类型的处理（包括缩放）的帧型依赖（FTD）处理。 FTD处理的基础是B图像中的错误不会传播到其他图像，因为解码的B图像不用作其他类型的图像的锚点。 换句话说，由于I或P图像不依赖于B图像，B图像中的任何错误都不会扩展到任何其他图像。 因此，本发明对于对整体视频质量至关重要的图片具有更多的存储和处理能力。

公开(公告)号：WO2005036823A2

公开(公告)日：2005-04-21

申请号：PCT/IB2004052072

申请日：2004-10-12

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  ZHONG ZHUN ,  MANGOLD STEFAN

Inventor： ZHONG ZHUN ,  MANGOLD STEFAN

IPC: H04L12/28 ,  H04W24/00 ,  H04W24/10 ,  H04W88/02 ,  H04W88/18

CPC classification number: H04W24/00 ,  H04L41/0213 ,  H04L43/065 ,  H04W24/10 ,  H04W88/02 ,  H04W88/18

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.

Abstract translation: 提供媒体感应时间直方图表格结构以包含在管理信息库（MIB）中，用于存储和访问媒体感应时间直方图测量结果，例如中等感应时间直方图测量报告。 为此，可以在媒体感应时间直方图报告表中提供预定数量的条目。 提供了用于无线设备输入和访问媒体感知时间直方图报告表中的条目的设备和方法。 该方法和装置旨在用于IEEE 802.11k标准以及需要测量介质的任何WLAN。

公开(公告)号：WO2004077747A8

公开(公告)日：2005-03-31

申请号：PCT/IB2004000469

申请日：2004-02-23

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  CHOU CHUN-TING ,  ZHONG ZHUN

Inventor： CHOU CHUN-TING ,  ZHONG ZHUN

IPC: H04L12/28 ,  H04L12/56 ,  H04W36/12 ,  H04W40/36 ,  H04L29/06

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：WO2004043016A2

公开(公告)日：2004-05-21

申请号：PCT/IB0304779

申请日：2003-10-27

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  PHILIPS CORP

Inventor： ZHONG ZHUN ,  PORTOLES MARC

IPC: H04L1/00 ,  H04L12/28 ,  H04W28/04 ,  H04W72/12 ,  H04W84/12 ,  H04L12/56

CPC classification number: H04W28/02 ,  H04L1/0002 ,  H04W72/1252

Abstract: In a wireless local area network (WLAN), the present invention provides a system and method for identifying traffic suffering from bad link quality and dynamically adjusting channel access to restrict the effect of this bad link quality. The dynamic adjustment to channel access is accomplished by lowering or raising the limit on the number of packets that can be transmitted between an AP and the wireless station over the a link as determined by the link quality. The link quality is determined by tracking the number of successive packet transmission successes and errors.

Abstract translation: 在无线局域网（WLAN）中，本发明提供了一种用于识别恶劣链路质量的交通流量的系统和方法，并且动态地调整信道接入以限制这种不良链路质量的影响。 通过降低或提高通过链路质量确定的AP和无线站之间可以传输的分组数量的限制来实现对信道接入的动态调整。 通过跟踪连续分组传输成功和错误的次数来确定链路质量。

公开(公告)号：WO2005006785A3

公开(公告)日：2005-03-24

申请号：PCT/IB2004051211

申请日：2004-07-13

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  ZHONG ZHUN

Inventor： ZHONG ZHUN

IPC: H04L12/28 ,  H04W24/00 ,  H04W36/08 ,  H04W72/12 ,  H04W74/00 ,  H04W74/08 ,  H04W84/12 ,  H04W88/08

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: 一种用于快速主动扫描的方法和一种减少常规主动扫描延迟的接入点设备。 该方法包括给予AP更高优先级以发送比当前已知的探测响应的步骤。 这个优先级来自于探测响应的传输的延迟，所以优选地，探测器响应可以延迟到AP需要准备响应的时间加上已经在空中完成的帧的时间（如果有的话）。 根据本发明，一种方法可以包括以下步骤：用于通过（STA）238,248,268在具有至少一个与其通信的接入点（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接收由（STA）发送的探测请求消息; 由所述特定（AP）278检测所述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，由（AP）278发送探测响应消息给（STA）238。 当探测请求被单播时，不需要退避间隔，因为只有一个AP将响应。 由于正常流量利用较长的DIFS空间加上退避以避免冲突，所以AP将始终能够比其他项目可以在通道上做出响应更快地响应扫描探测请求，从而在发送探测响应消息时给予AP优先级。

公开(公告)号：WO2004098108A3

公开(公告)日：2005-01-06

申请号：PCT/IB2004001304

申请日：2004-04-22

Applicant: KONINKL PHILIPS ELECTRONICS NV ,  ZHONG ZHUN ,  SOOMRO AMJAD ,  MANGOLD STEFAN

Inventor： ZHONG ZHUN ,  SOOMRO AMJAD ,  MANGOLD STEFAN

IPC: H04L12/28 ,  H04L12/56 ,  H04W36/08 ,  H04W36/18 ,  H04W36/22 ,  H04W60/06 ,  H04W76/06 ,  H04W84/12 ,  H04W88/08 ,  H04Q7/38

CPC classification number: H04W76/064 ,  H04W36/08 ,  H04W36/18 ,  H04W36/22 ,  H04W60/06 ,  H04W84/12 ,  H04W88/08

Abstract: A plurality of methods, apparatus and computer program for providing a warning to a station (STA) associated with an Access Point (AP) in a WLAN indicating that a disassociation the AP is imminent. The steps of one of the methods include (a) selecting a station (STA) for disassociation from a particular Access Point (AP) of a WLAN; (b) updating a reason code field of a message(i.e. a measurement request frame or a site report response 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,and being finally handed off from the current to another (selected) 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。