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    PACKET/FAST PACKET SWITCH FOR VOICE AND DATA
    23.
    发明专利
    PACKET/FAST PACKET SWITCH FOR VOICE AND DATA 未知

    公开(公告)号：CA2038952A1

    公开(公告)日：1991-03-30

    申请号：CA2038952

    申请日：1990-08-23

    Applicant: MOTOROLA INC

    Inventor： WHITE RICHARD E ,  BUCHHOLZ DALE R ,  JOHANSON LISA B ,  FREEBURG THOMAS A

    IPC: H04L12/64 ,  H04Q3/42

    Abstract: A network interface architecture for a packet/fast packet switch is described. This architecture provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes not only bandwidth within the voice or data areas of the frame, but also between the voice and data portions. The network interface (105) provides a means (101) of passing all packets through the Network Interface (105) or allowing the packet devices to directly transfer packets between one another. The bandwidth allocation can easily be changed because the control and data memories are synchronized to one another. The architecture allows for the data packets and the control of bandwidth allocation to be controlled by a single switching device. It synchronizes the transfer of the data and the allocation of bus bandwidth. The control of the packet devices can be controlled at a very high bit rate such as 40 Mbps. It allows packet devices to directly transfer packets. It allows for easy re-allocation of bandwidth through the use of the NI Base Registers.

    METHOD FOR REDUCING CONTENTION AND RESOURCE MISALLOCATION
    26.
    发明公开
    METHOD FOR REDUCING CONTENTION AND RESOURCE MISALLOCATION 失效
    方法减少竞争和设备故障ASSIGNMENTS

    公开(公告)号：EP0646302A4

    公开(公告)日：2001-11-07

    申请号：EP94909816

    申请日：1994-02-25

    Applicant: MOTOROLA INC

    Inventor： BUCHHOLZ DALE R ,  DOSS WILLIAM K ,  ROBBINS KAREN E ,  HAMILTON R LEE

    IPC: H04J3/16 ,  H04L12/28

    CPC classification number: H04W72/0406 ,  H04J3/1694 ,  H04L1/1854 ,  H04L1/1877 ,  H04L1/188 ,  H04W72/0413 ,  H04W72/042 ,  H04W74/08

    Abstract: A packet transmission system (100) for reducing request traffic contention and the likelihood of resource misallocation includes a communications controller (110) and a plurality of remote requesting units (112) requesting packet transmission services. In response to receipt of a request (302), the controller (110) transmits a grant (306) to a requesting unit (112) when packet transmission resources (304 and 310) are available or a request acknowledgment (306) when packet transmission resources (304 and 310) are unavailable. Each remote unit (112) comprises apparatus structure and method steps for transmitting requests (302) to the controller (110) and starting a first timer having an interval (T) determined as a function of a number (Q) of outstanding requests (302). Upon receipt of an acknowledgment (306), the remote unit (112) starts a second timer having an interval (T1) longer than the inverval (T). Upon expiration of either the first timer or the second timer, the remote unit (112) will then and only then transmit a duplicate request (302). By limiting the number of duplicate requests transmitted by a remote unit (112), the present invention operates to reduce request traffic contention and the likelihood of resource misallocation.

    PACKET HANDLING METHOD
    28.
    发明公开
    PACKET HANDLING METHOD 失效
    分组处理方法

    公开(公告)号：EP0506688A4

    公开(公告)日：1996-07-17

    申请号：EP91900097

    申请日：1990-12-03

    Applicant: MOTOROLA INC

    Inventor： FREEBURG THOMAS A ,  KACZMARCZYK JOHN M ,  BUCHHOLZ DALE R ,  WHITE RICHARD E ,  CHANG HUNGKUN J ,  NOLAN MICHAEL P

    IPC: H04L12/54 ,  H04J3/24 ,  H04Q7/00 ,  H04Q11/04

    CPC classification number: H04L12/56

    Abstract: In this invention a hierarchical addressing technique is employed in a packet communications system to enhance flexibility in handling packet information. This method permits packet message data (Fig. 3) and certain packet control data (Fig. 3) to be stored in memory locations (32, 34) without having to be duplicated at a different memory location prior to transmission of the packet. This method is preferably employed in a ring configuration in which a series of packets have addressing mechanisms which points sequentially to each other to form a ring of packets.

    29.
    发明专利
    未知

    公开(公告)号：BR9405540A

    公开(公告)日：1999-09-08

    申请号：BR9405540

    申请日：1994-06-27

    Applicant: MOTOROLA INC

    Inventor： BUCHHOLZ DALE R ,  DOSS WILLIAM K ,  HAMILTON R LEE JR ,  WHITE RICHARD E ,  ROBBINS KAREN

    IPC: H04L1/12 ,  H04L1/16 ,  H04L1/18 ,  H04L12/56 ,  H04L29/06 ,  H04L29/08

    Abstract: A packet switching system (100) having a packet switch (140) employs an acknowledgement scheme in order assure the delivery of all fragments (310) comprising a fragmented data packet (300) to improve overall system throughput during the handling of packets (310) that require reassembly. When packet fragments (310) are lost, corrupted or otherwise unintelligible to a receiving device (92, 94), the acknowledgement scheme permits retransmission of the missing data. In addition, a second acknowledgment signal is scheduled by system processing resources (110) in order to verify the successful delivery of all retransmitted data.

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