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1. 发明授权

US6141322A Method and apparatus for precedence and preemption in ATM connection admission control 失效
标题翻译： ATM连接准入控制中优先权和抢占的方法和装置
公开(公告)号：US6141322A
公开(公告)日：2000-10-31
申请号：US853654
申请日：1997-05-09
申请人： Scott Michael Poretsky
发明人： Scott Michael Poretsky
IPC分类号： H04L12/56
CPC分类号： H04L49/20 , H04L49/254 , H04L2012/563 , H04L2012/5651
摘要： A informational element (IE) is provided which permits the user to assign a precedence level to a call. A precedence/preemption connection admission control (P/P CAC) for use with any bandwidth allocation algorithm is also provided for processing a virtual circuit connection (VCC) request having an assigned precedence level, and for preempting one or more VCCs when a VCC request having a relatively higher precedence level is received at an ATM switch. Preferably, a resource allocator containing two databases, one listing all active virtual circuit connections and a second listing all preempted virtual circuits, is provided for storing the call parameters of preempted VCCs. According to a preferred embodiment, preempted VCCs may be reestablished. Reestablishment occurs according to various criteria. In addition, a second embodiment of a P/P CAC is provided in which active VCCs identified for preemption are buffered until the requested VCC is accepted by a downstream ATM switch. Once acceptance is received, the identified calls are released. If downstream acceptance is not provided prior to a timeout, the requested VCC is released and the VCCs identified for preemption are kept active.
摘要翻译：提供信息元素（IE），其允许用户为呼叫分配优先级。还提供了与任何带宽分配算法一起使用的优先/抢占连接准入控制（P / P CAC），用于处理具有分配的优先级的虚拟电路连接（VCC）请求，并且用于在VCC请求时抢占一个或多个VCC 在ATM交换机处接收到具有相对较高优先级的信号。优选地，提供包含两个数据库的资源分配器，一个列出所有活动的虚拟电路连接，以及列出所有被抢占的虚拟电路的资源分配器，用于存储被抢占的VCC的呼叫参数。根据优选实施例，可以重新建立被抢占的VCC。重建按照各种标准进行。此外，提供了P / P CAC的第二实施例，其中缓存识别用于抢占的活动VCC被缓冲，直到所请求的VCC被下游ATM交换机接受。一旦接收到接收，所发出的呼叫被释放。如果在超时之前未提供下游接收，则请求的VCC被释放，并且识别为抢占的VCC保持活动。

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