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    • 10. 发明授权
    • Media access controller with a shared class message delivery capability
    • 具有共享类消息传递功能的媒体访问控制器
    • US5491531A
    • 1996-02-13
    • US54703
    • 1993-04-28
    • Shawn L. AdamsTimothy SiorekMark A. Lucak
    • Shawn L. AdamsTimothy SiorekMark A. Lucak
    • H04L12/407H04L7/00H04J3/16H04J3/24
    • H04L12/40013H04L49/90
    • Activity on a digital communication network is divided into periodic intervals, that are further subdivided into first and second phases during which different classes of data are transmitted. A media access controller for a station on the network has an interface that connects to an external device which supplies first and second classes of data for transmission over the network. A first memory stores the first class of data and a second memory stores the second class of data. The external device supplies a third class of data that may be transmitted over the network during either the first or second phases. The third class of data is held in a third memory. A transmitter connects the three memories to the interface in order to send data over the network. A control circuit regulates the transfer of data from the memories to the transmitter, with data being transferred from the first memory when the media access controller has access to the network during one of the first phases. Data is transferred from the second memory when the media access controller has access to the network during one of the second phases, while data in the said third memory is transmitted when the media access controller has access to the network during either of the first or second phases. The transfer of data is governed by three pointers that indicate the amount of data within the memories that has been released for transmission by the device.
    • 数字通信网络上的活动被划分为周期性间隔,其被进一步细分为第一和第二阶段,在该阶段期间传送不同类别的数据。 用于网络上的站的媒体访问控制器具有连接到外部设备的接口,该外部设备提供第一和第二类数据以通过网络传输。 第一存储器存储第一类数据,第二存储器存储第二类数据。 外部设备提供可以在第一阶段或第二阶段期间通过网络发送的第三类数据。 第三类数据被保存在第三存储器中。 发射机将三个存储器连接到接口,以便通过网络发送数据。 控制电路调节从存储器到发送器的数据传输,当媒体访问控制器在第一阶段之一期间访问网络时,数据从第一存储器传送。 当介质访问控制器在第二阶段中的一个阶段期间访问网络时,从第二存储器传送数据,而当媒体访问控制器在第一或第二阶段期间访问网络时,传送所述第三存储器中的数据 阶段 数据传输由三个指针指示,这三个指针指示已经释放以供设备传输的存储器内的数据量。