公开(公告)号：US20020075941A1

公开(公告)日：2002-06-20

申请号：US09736755

申请日：2000-12-14

Applicant: MOTOROLA, INC.

Inventor： Slim Souissi ,  Leo G. Dehner ,  Eric F. Meihofer

IPC: H04K001/00 ,  H04B015/00 ,  H04L027/30

CPC classification number: H04B1/715 ,  H04B2001/7154

Abstract: Spread spectrum packet-switching radio devices are operated in two or more ad-hoc networks or pico-networks that share frequency-hopping channels and time slots that may collide. The piconets can be short range wireless associations of communicating devices, for example according to the Bluetooth, Home RF or similar industry protocols. One device in each piconet is a synchronizing master and others are slaves that follow the master's frequency hopping sequence. The sequences of two or more operating piconets (masters) occasionally coincide, which could cause simultaneous transmissions that interfere or collide. The frequency hopping sequences of two or more masters are exchanged using identity codes, permitting the devices to anticipate collision time slots. Priorities are assigned to the simultaneously operating piconets during collision slots, e.g., as a function of their message queue size or latency, or other factors. Lower priority devices may abstain from transmitting during predicted collision slots, and/or a higher priority device may employ enhanced transmission resources during those slots, such as higher error correction levels, or various combinations of abstinence and error correction may be applied. Collisions are avoided or the higher priority piconet is made likely to prevail in a collision. Priorities are repetitively re-determined and re-assigned, to allocate communications resources among all the devices and piconets.

Abstract translation: 扩频分组交换无线电设备在共享跳频信道和可能发生冲突的时隙的两个或更多个自组织网络或微微网中操作。 微微网可以是通信设备的短距离无线关联，例如根据蓝牙，家庭RF或类似的行业协议。 每个微微网中的一个设备是同步主机，而其他设备是跟随主机跳频序列的从机。 两个或多个操作微微网（主机）的序列偶尔重合，这可能导致干扰或碰撞的同时传输。 使用身份码交换两个或更多个主机的跳频序列，允许设备预测冲突时隙。 在冲突时隙期间，优先级被分配给同时操作的微微网，例如，作为其消息队列大小或延迟或其他因素的函数。 较低优先级的设备可以在预测的冲突时隙期间放弃发送，和/或较高优先级的设备可以在那些时隙期间采用增强的传输资源，诸如更高的纠错水平，或者可以应用各种禁欲和纠错的组合。 避免碰撞，或者较高优先级的微微网可能在碰撞中占上风。 优先级被重新确定并重新分配，以便在所有设备和微微网之间分配通信资源。