公开(公告)号：US5258980A

公开(公告)日：1993-11-02

申请号：US684924

申请日：1991-04-24

申请人： Akihiro Maebara ,  Seizo Onoe ,  Fumiyuki Adachi ,  Masaharu Hata ,  Toshinori Fujii

发明人： Akihiro Maebara ,  Seizo Onoe ,  Fumiyuki Adachi ,  Masaharu Hata ,  Toshinori Fujii

IPC分类号： H04W36/08 ,  H04W56/00 ,  H04W72/04 ,  H04J3/16

CPC分类号： H04W36/18 ,  H04W56/00

摘要： A radio channel switching control method for a digital mobile communication system employing TDMA techniques, in which a mobile station stores the synchronized state in the current channel, switches the current channel to a new one and performs a pull-in operation for a predetermined period of time and stores the synchronized state obtained by the pull-in operation. The mobile station establishes synchronism with the new channel by repeating a sequence of steps of performing communication again in the synchronized state in the current channel and performing the pull-in operation in the stored synchronized state for the new channel. Thus, it is possible to implement radio channel switching free from momentary interruption of communication, by maintaining communication in the current channel until synchronization with the new channel is established and communication is permitted. A common reference clock is applied to a plurality of pieces of radio equipment in a base station and each radio equipment obtains a synchronized state parameter for an arbitrary slot of the channel allocated thereto. When it is judged that channel switching is necessary, the synchronized state parameter in the current channel is set in the radio equipment of the new channel, by which the radio equipment of the new channel is caused to immediately start reception in the same synchronized state as in the current channel.

摘要翻译： PCT No.PCT / JP90 / 01076 Sec。 371日期1991年4月24日 102（e）日期1991年4月24日PCT 1990年8月24日PCT PCT。 公开号WO91 / 03110 日期1991年3月7日。一种采用TDMA技术的数字移动通信系统的无线电信道切换控制方法，其中移动台在当前信道中存储同步状态，将当前信道切换到新的信道， 在预定时间段内操作，并存储通过拉入操作获得的同步状态。 移动站通过重复在当前信道中处于同步状态的再次执行通信的步骤的顺序来与新信道建立同步，并且在新信道的存储的同步状态下执行引入操作。 因此，可以通过维持当前信道中的通信，直到与新信道的同步建立并且允许通信，来实现无瞬间中断通信的无线电信道切换。 公共参考时钟被应用于基站中的多个无线电设备，并且每个无线电设备获得用于其分配的信道的任意时隙的同步状态参数。 当判断需要频道切换时，在新频道的无线电设备中设置当前频道中的同步状态参数，通过该新频道的无线电设备使得新频道的无线电设备立即以与 在当前频道。

公开(公告)号：US4708545A

公开(公告)日：1987-11-24

申请号：US797983

申请日：1985-11-14

申请人： Toshinori Fujii ,  Shinji Okamoto

发明人： Toshinori Fujii ,  Shinji Okamoto

IPC分类号： H05K3/00 ,  B23B49/00 ,  B23Q35/02 ,  G03F9/00 ,  H05K1/02 ,  H05K3/46 ,  B23C3/00

CPC分类号： B23Q35/02 ,  G03F9/00 ,  H05K3/4638 ,  H05K1/0269 ,  H05K2201/083 ,  H05K2201/09781 ,  H05K2203/101 ,  H05K3/0008 ,  H05K3/0047 ,  H05K3/4611 ,  Y10T408/03 ,  Y10T409/303752

摘要： A method for drilling reference holes in a multi-layer printed wiring board assembly, in which drilling position marks provided on inner-layer circuit board in the assembly are roughly detected through each of two outer-layer boards of the assembly, a spot-facing is made with respect to the outer-layer boards at roughly detected points of the marks, and thereafter the marks are precisely detected at the faced spots. Positions for drilling the reference holes can be thereby determined at the spots precisely in close proximity to the internally provided drilling position marks, to allow the drilling performed very accurately in simpler and economical manner.

摘要翻译： 一种用于在多层印刷线路板组件中钻取参考孔的方法，其中通过组件的两个外层板中的每一个大致检测在组件中的内层电路板上提供的钻孔位置标记， 在标记的大致检测点处相对于外层板制成，然后在面部处精确地检测出标记。 因此，可以在精确地靠近内部提供的钻孔位置标记的位置处确定钻孔参考孔的位置，以便以更简单和经济的方式非常精确地执行钻孔。