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21. 发明授权

US6078591A Apparatus and method for selectively modifying collision delay intervals based on a detected capture effect in half-duplex network 失效
标题翻译：基于在半双工网络中检测到的捕获效应来选择性地修改冲突延迟间隔的装置和方法
公开(公告)号：US6078591A
公开(公告)日：2000-06-20
申请号：US896099
申请日：1997-07-17
申请人： Mohan V. Kalkunte , Simon L. H. Liang
发明人： Mohan V. Kalkunte , Simon L. H. Liang
IPC分类号： H04L12/413
CPC分类号： H04L12/413
摘要： Collision delay intervals are modified in a network node in order to overcome a detected capture effect in a half-duplex network. A network interface having a media access control (MAC) selectively modifies the collision delay interval based on detected capture effect. In one implementation, a node that has been locked out resets its attempt counter to become more aggressive in contending for the media. In applications requiring a guaranteed access, the attempt counter is reset and the collision delay interval is forced to zero slot times to attempt immediate access of the media following a collision. If the network includes multiple applications requiring guaranteed access, a node having encountered collisions switches from normal operation under the truncated binary exponential backoff (TBEB) algorithm to a shifted TBEB operation. If the node has captured the media, the node increases its attempt counter by a prescribed value to provide a less aggressive contention during collision mediation.
摘要翻译：在网络节点中修改了冲突延迟间隔，以克服半双工网络中检测到的捕获效应。具有媒体访问控制（MAC）的网络接口基于检测到的捕获效果选择性地修改冲突延迟间隔。在一个实现中，已被锁定的节点重置其尝试计数器以在竞争媒体时变得更加积极。在需要保证访问的应用中，尝试计数器被复位，冲突延迟时间间隔被强制为零时隙，以便在冲突后立即访问介质。如果网络包括需要保证访问的多个应用，则遇到冲突的节点从截断二进制指数退避（TBEB）算法的正常操作切换到移位TBEB操作。如果节点已经捕获了媒体，则节点会将其尝试次数增加一个规定的值，以便在碰撞调解期间提供较少侵略性的争用。

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