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1. 发明授权

US5386457A Method and apparatus for resolving contention between multiple base units during a call setup in a public cordless telephone system 失效
标题翻译：用于在公共无绳电话系统中的呼叫建立期间解决多个基站之间争用的方法和装置
公开(公告)号：US5386457A
公开(公告)日：1995-01-31
申请号：US70003
申请日：1993-05-28
申请人： George P. Cotsonas , Kenneth Kasiske , Dale E. Lynn , Edwin A. Muth
发明人： George P. Cotsonas , Kenneth Kasiske , Dale E. Lynn , Edwin A. Muth
IPC分类号： H04W4/00 , H04W72/00 , H04W72/04 , H04W74/04 , H04W74/08 , H04W76/02 , H04M11/00
CPC分类号： H04W74/085 , H04W72/0446 , H04W76/02
摘要： A cordless telephone public base unit employed in a public telephone system in close proximity with other public base units effectively avoids contention with these other base units for access to a cordless telephone handset unit generating a service request. Contention between the public base unit and the other public base units is resolved by assigning a specific one of a plurality of times during which the base unit may respond to the service request from the handset unit. The time in which the base unit responds to the service request may advantageously be determined by a randomly generated number, the received signal strength of the service request or a combination of these two parameters. Once access to the handset unit is acquired by a base unit and communications between these two units is established on a communications channel, all other handset units and base units are prevented from interfering with the communications between these two units.
摘要翻译：在与其他公共基站相邻的公共电话系统中使用的无绳电话公共基站单元有效地避免了与这些其他基站的竞争，以访问产生服务请求的无绳电话手机单元。通过分配基站单元可以从手机单元响应服务请求的多个时间中的特定一个来解决公共基站单元和其他公共基站单元之间的争用。基本单元响应于服务请求的时间可以有利地由随机生成的号码，服务请求的接收信号强度或这两个参数的组合来确定。一旦基本单元获取对手机单元的访问，并且在通信信道上建立了这两个单元之间的通信，则防止所有其他手机单元和基站单元干扰这两个单元之间的通信。

2. 发明授权

US5371782A Method and apparatus for selecting a preferred service provider during a call setup in a public cordless telephone system 失效
标题翻译：在公共无绳电话系统中的呼叫建立期间选择优选服务提供商的方法和装置
公开(公告)号：US5371782A
公开(公告)日：1994-12-06
申请号：US694610
申请日：1991-05-02
申请人： William J. Casey, III , George P. Cotsonas , Dale E. Lynn , Edwin A. Muth
发明人： William J. Casey, III , George P. Cotsonas , Dale E. Lynn , Edwin A. Muth
IPC分类号： H04W12/06 , H04W48/18 , H04W76/02 , H04M11/00
CPC分类号： H04W48/18 , H04W76/02
摘要： In a public cordless telephone system, a cordless telephone handset unit requests and establishes a communications link with a public base unit served by a desired local service provider whenever possible. By generating a service request containing a specific carrier request code, the handset unit selectively identifies an available public base unit served by the desired local service provider and then establishes a communications link with this base unit. In response to receiving the service request from the handset unit, all public base units operated by the chosen service provider respond by providing a first acknowledgment signal. All other public base units respond by providing a second acknowledgment signal. When both such signals are received, the handset unit responds only to the first acknowledgment signal and establishes a communications link with the first base unit providing this signal. When only the second acknowledgment signal is received, the handset unit responds by establishing a communications link with the first base unit providing this second acknowledgment signal. When communications is established with a base unit providing the second acknowledgment signal, an alerting signal is generated at the handset unit thereby informing the user that even though he or she is able to make a telephone call, the desired local service provider was not reached. Collision avoidance between public base units while supporting this operation may be provided by assigning a specific one of a plurality of times during which each public base unit may respond to the service request from the handset unit.
摘要翻译：在公共无绳电话系统中，无绳电话手机单元尽可能地请求并建立与期望的本地服务提供商所服务的公共基站的通信链路。通过生成包含特定载波请求码的服务请求，手机单元选择性地识别由所需本地服务提供商服务的可用的公共基站单元，然后与该基站建立通信链路。响应于从手机单元接收到服务请求，由所选服务提供商操作的所有公共基站单元通过提供第一确认信号来进行响应。所有其他公共基站单元通过提供第二确认信号作出响应。当两个这样的信号被接收时，手机单元仅响应于第一确认信号，并建立与提供该信号的第一基站单元的通信链路。当仅接收到第二确认信号时，手机单元通过建立与提供该第二确认信号的第一基站单元的通信链路进行响应。当与提供第二确认信号的基本单元建立通信时，在手机单元处产生报警信号，从而通知用户即使他或她能够进行电话呼叫，也未到达所需的本地服务提供商。支持该操作的公共基站单元之间的冲突避免可以通过分配多个时间中的特定的一个来提供，在此期间，每个公共基站单元可以响应来自手机单元的服务请求。

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