Apparatus and Method for Synchronizing a Cordless Telephone Base Unit and Multiple Portable Units on a Common Communication Channel
Номер патента: CA2161723A1
Опубликовано: 02-06-1996
Автор(ы): Guido Bertocci, Hon-Chi Yu, Siegfried F. Rehwinkel, Walter Tomkoski, William J. Nealon
Принадлежит: AT&T Corp
Опубликовано: 02-06-1996
Автор(ы): Guido Bertocci, Hon-Chi Yu, Siegfried F. Rehwinkel, Walter Tomkoski, William J. Nealon
Принадлежит: AT&T Corp
Реферат: A cordless telephone system achieves synchronism for each one of multiple portable units to the same communication channel for communicating with a common base unit. The cordless system uses a dual channel process to allow both the freedom to dynamically change channels as needed to avoid interference whilesimultaneously providing a capability to resynchronize any portable unit with the base unit on a selected active channel. This is achieved through the use of a fixed service channel and an active channel which changes as needed. If a channel change is made during a call, after the call is completed, the base unit returns to the previous active channel and broadcasts a message to the multiple portable units indicative of the new active channel. Also, any portable unit that attempts to communicate with the base unit on the wrong channel and fails to get a response will transmit a message on the fixed service channel requesting the current active channel from the base unit. Responsive to this request, the base unit provides information indicative of the active channel over the service channel. Once equipped with the current active channel information, the portable unit is able to reach and establish communications with the base unit.
Information processing apparatus and information processing method for part image generation and part image display
Номер патента: US9904433B2. Автор: Masahiro Takahashi,Kunihito Sawai,Kazuma Takahashi,Kae OKAZAWA,Junichirou Sakata. Владелец: Sony Corp. Дата публикации: 2018-02-27.