公开(公告)号：US5163045A

公开(公告)日：1992-11-10

申请号：US591182

申请日：1990-10-01

申请人： Bruce E. Caram ,  Ronald C. Roposh ,  Harvey Rubin

发明人： Bruce E. Caram ,  Ronald C. Roposh ,  Harvey Rubin

IPC分类号： H04L29/06 ,  H04L29/00

CPC分类号： H04L29/00

摘要： A communications system that is arranged to transport so-called connection oriented messages via respective virtual circuit connections is enhanced so that it also transports so-called connectionless messages via a predefined virtual circuit connection that is common among those data modules which participate in the connectionless message service. In particular, each module which participates in the connectionless message service is assigned, in addition to a primary address that is used in conjunction with associated channels numbers to transport respective connection oriented messages, a common address and a channel number that is used solely for transporting connectionless messages. In this way, the communications system processes connectionless messages as though they were connection oriented messages.

公开(公告)号：US5396494A

公开(公告)日：1995-03-07

申请号：US37832

申请日：1993-03-25

申请人： Ronald C. Roposh

发明人： Ronald C. Roposh

IPC分类号： H04L12/40 ,  H04L12/56 ,  H04Q11/04 ,  H04J3/02

CPC分类号： H04L12/4015 ,  H04L12/40 ,  H04Q11/0478 ,  H04L2012/5613 ,  H04L2012/5615

摘要： A facility is provided for operating an asynchronous packet transmit bus such that isochronous information packets may be transmitted from a source to a destination with a fixed, constant delay. The fixed, constant delay is achieved by employing a bandwidth management bus and assigning to port modules which contend for access to the transmit bus respective levels of priority, in which the highest level of priority is associated with isochronous information and in which lower levels of priority are associated with other types of information, such as asynchronous information. In addition, each port module which transmits isochronous information is assigned at least one time slot of each frame of time slots. In this way, a port module that needs to transmit isochronous information is granted access to the transmit bus during its assigned time slot if the module asserts such highest level of priority in response to its address being transmitted over the bandwidth management bus. If the module fails to assert such priority, then the time slot is marked for open contention, thereby allowing the other port modules to contend for access to the transmit bus during that time slot.

摘要翻译： 提供了用于操作异步分组发送总线的设施，使得同步信息分组可以以固定的恒定延迟从源传输到目的地。 固定的恒定延迟通过采用带宽管理总线并分配给端口模块来实现，该端口模块竞争访问发送总线各自的优先级别，其中最高优先级与等时信息相关联，并且其中优先级较低 与其他类型的信息相关联，例如异步信息。 另外，发送等时信息的每个端口模块被分配到每个时隙的至少一个时隙。 以这种方式，如果模块响应于其通过带宽管理总线发送的地址来确定最高级别的优先级，则在其分配的时隙期间允许需要传输等时信息的端口模块对发送总线的访问。 如果模块无法断言这样的优先级，则该时隙被标记为公开竞争，从而允许其他端口模块在该时隙期间争取访问发送总线。