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1. 发明申请

WO2004059913A3 EFFECTIVE POINT COORDINATION FUNCTION IN WIRELESS LAN 审中-公开
标题翻译：无线局域网中的有效点协调功能
公开(公告)号：WO2004059913A3
公开(公告)日：2004-11-11
申请号：PCT/IB0306093
申请日：2003-12-15
申请人： KONINKL PHILIPS ELECTRONICS NV , TIAN JIANBO , JIA QUNLI
发明人： TIAN JIANBO , JIA QUNLI
IPC分类号： H04L12/24 , H04L12/26 , H04L12/28 , H04W74/06 , H04W84/12
CPC分类号： H04W74/02 , H04W84/12
摘要： This invention provides a system and method for enhancing point coordination function PCF in wireless LANs. A contention procedure is introduced into PCF in this invention. When the point coordinator (PC) polls the mobile terminal who has no frame to send, the terminal does not respond to the CF-Poll from PC, and will adjust its NAV (Network Allocation Vector) and set it to a special value that is defined as SPIFS (S-PCF Interframe Space). When data is ready on this mobile terminal when it is still in the same Contention Free Period CFP and its poll period is over, the terminal can contend for accessing the medium. If it detects the medium to be idle for SPIFS period during the CFP (Contention Free Period), then the mobile terminal gains the control of medium and starts to send the ready data. So this mobile terminal can have another opportunity to gain the control of medium during this CFP instead of next CFP, and this can decrease the transmission delay.
摘要翻译：本发明提供了一种用于增强无线LAN中的点协调功能PCF的系统和方法。在本发明中将争用程序引入到PCF中。当点协调器（PC）轮询没有帧发送的移动终端时，终端不从PC响应CF-Poll，并且将调整其NAV（网络分配向量）并将其设置为特殊值定义为SPIFS（S-PCF帧间间隔）。当移动终端上的数据仍然处于相同的争用自由周期CFP并且其轮询期间结束时，终端可以争取访问该媒体。如果在CFP（无竞争期间）期间检测到SPIFS周期的媒体空闲，则移动终端获得媒体的控制，并开始发送就绪数据。所以这个移动终端可以有另一个机会来获得CFP而不是下一个CFP的媒体的控制，这样可以减少传输延迟。

2. 发明专利

DE602004019407D1 未知
公开(公告)号：DE602004019407D1
公开(公告)日：2009-03-26
申请号：DE602004019407
申请日：2004-05-06
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： FENG LEI , SHAO XIAOLING , TU JIAWEN , DU YONGGANG , LIU BO , JING XIAOHUI , TIAN JIANBO , SUN XIAOLU
IPC分类号： H04L12/28 , H04L12/46 , H04L45/85 , H04W8/26 , H04W36/14 , H04W36/18 , H04W76/02 , H04W80/04 , H04W84/04 , H04W84/12 , H04W88/06
摘要： The present invention takes the advantage of the WLAN resources in hotspots for voice and data connections and enables seamless handover between WWAN and WLAN and vice versa. This allows two users in the hotspots to communicate with each other by making a voice over IP (VoIP) or video call, thus achieving cost savings for the end users and WWAN resources savings for the wireless operators. According to one embodiment of the invention, a mobile terminal has wireless wide area network (WWAN) and wireless local area network (WLAN) interfaces. The mobile terminal via a WWAN. If a WLAN is present, the mobile terminal sends a handover request together with its network address to the called mobile terminal, using a short message service (SMS) technique or a watermarking technique, for initiating a WLAN call with the called mobile terminal via a WLAN. After the WLAN call is established with the called mobile terminal, the mobile terminal releases the WWAN call.

3. 发明专利

AU2003286374A1 EFFECTIVE POINT COORDINATION FUNCTION IN WIRELESS LAN 未知
公开(公告)号：AU2003286374A1
公开(公告)日：2004-07-22
申请号：AU2003286374
申请日：2003-12-15
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： TIAN JIANBO , JIA QUNLI
IPC分类号： H04L12/24 , H04L12/26 , H04L12/28 , H04W74/06 , H04W84/12
摘要： This invention provides a system and method for enhancing point coordination function in wireless LANs. A contention procedure is introduced into PCF in this invention. When the point coordinator (PC) polls the mobile terminal who has no frame to send, the terminal does not respond to the CF-Poll from PC, and will adjust its NAV and set it to a special value that is defined as SPIFS. When data is ready on this mobile terminal, the terminal can contend for accessing the medium. If it detects the medium to be idle for SPIFS period during the CFP, then the mobile terminal gains the control of medium and starts to send the ready data. So this mobile terminal can have another opportunity to gain the control of medium during this CFP instead of next CFP, and this can decrease the transmission delay.

4. 发明专利

AT422761T 未知
公开(公告)号：AT422761T
公开(公告)日：2009-02-15
申请号：AT04731438
申请日：2004-05-06
申请人： KONINKL PHILIPS ELECTRONICS NV
发明人： FENG LEI , SHAO XIAOLING , TU JIAWEN , DU YONGGANG , LIU BO , JING XIAOHUI , TIAN JIANBO , SUN XIAOLU
IPC分类号： H04L12/28 , H04L12/46 , H04L45/85 , H04W8/26 , H04W36/14 , H04W36/18 , H04W76/02 , H04W80/04 , H04W84/04 , H04W84/12 , H04W88/06
摘要： The present invention takes the advantage of the WLAN resources in hotspots for voice and data connections and enables seamless handover between WWAN and WLAN and vice versa. This allows two users in the hotspots to communicate with each other by making a voice over IP (VoIP) or video call, thus achieving cost savings for the end users and WWAN resources savings for the wireless operators. According to one embodiment of the invention, a mobile terminal has wireless wide area network (WWAN) and wireless local area network (WLAN) interfaces. The mobile terminal via a WWAN. If a WLAN is present, the mobile terminal sends a handover request together with its network address to the called mobile terminal, using a short message service (SMS) technique or a watermarking technique, for initiating a WLAN call with the called mobile terminal via a WLAN. After the WLAN call is established with the called mobile terminal, the mobile terminal releases the WWAN call.

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