公开(公告)号：WO2002067469A1

公开(公告)日：2002-08-29

申请号：PCT/US2001/048411

申请日：2001-12-14

Applicant: MOTOROLA INC.

Inventor： SOUISSI, Slim ,  DEHNER, Leo ,  MEIHOFER, Eric

IPC: H04B15/00

CPC classification number: H04B1/715 ,  H04B2001/7154

Abstract: Spread spectrum packet-switching radio devices (22) are operated in two or more ad-hoc networks or pico-networks (19, 20, 21) that share frequency-hopping channels and time slots that may collide. The piconets (19, 20, 21) can be short range wireless associations of communicating devices (22), for example according to the Bluetooth, Home RF or similar industry protocols. One device in each piconet (19, 20, 21) is a synchronizing master (25) and others are slaves (27) that follow the master's frequency hopping sequence. The sequences (54) of two or more operating piconets (19, 20, 21), i.e., masters (25), occasionally coincide, which could cause simultaneous transmissions that interfere or collide. The frequency hopping sequences (54) of two or more masters (25) are exchanged using identity codes, permitting the devices to anticipate collision time slots (52). Priorities are assigned to the simultaneously operating piconets (19, 20, 21) during collision slots (52), 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 (52), 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 (19, 20, 21) is made likely to prevail in a collision. Priorities are repetitively re-determined and re-assigned, to allocate communications resources among all the devices (22) and piconets (19, 20, 21).

Abstract translation: 扩频分组交换无线电设备（22）在共享跳频信道和可能发生冲突的时隙的两个或多个自组织网络或微微网络（19,20,21）中操作。 微微网（19,20,21）可以是例如根据蓝牙，家庭RF或类似工业协议的通信设备（22）的短距离无线关联。 每个微微网（19,20,21）中的一个设备是同步主机（25），而其他设备是跟随主机的跳频序列的从机（27）。 两个或更多个操作微微网（19,20,21）的序列（54），即主机（25）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多个主器件（25）的跳频序列（54），允许设备预测冲突时隙（52）。 在冲突时隙（52）期间，优先级被分配给同时操作的微微网（19,20,21），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（52）期间放弃发射，和/或较高优先级的设备可以在这些时隙期间采用增强的传输资源，例如更高的纠错水平，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（19,20,21）在碰撞中成为可能。 优先级被重新确定并重新分配，以在所有设备（22）和微微网（19,20,21）之间分配通信资源。

公开(公告)号：EP1344339A1

公开(公告)日：2003-09-17

申请号：EP01273799.5

申请日：2001-12-14

Applicant: MOTOROLA, INC.

Inventor： SOUISSI, Slim ,  DEHNER, Leo ,  MEIHOFER, Eric

IPC: H04B15/00 ,  H04K1/00 ,  H04L27/30

CPC classification number: H04B1/715 ,  H04B2001/7154

Abstract: Spread spectrum packet-switching radio devices (22) are operated in two or more ad-hoc networks or pico-networks (19, 20, 21) that share frequency-hopping channels and time slots that may collide. The piconets (19, 20, 21) can be short range wireless associations of communicating devices (22), for example according to the Bluetooth, Home RF or similar industry protocols. One device in each piconet (19, 20, 21) is a synchronizing master (25) and others are slaves (27) that follow the master's frequency hopping sequence. The sequences (54) of two or more operating piconets (19, 20, 21), i.e., masters (25), occasionally coincide, which could cause simultaneous transmissions that interfere or collide. The frequency hopping sequences (54) of two or more masters (25) are exchanged using identity codes, permitting the devices to anticipate collision time slots (52). Priorities are assigned to the simultaneously operating piconets (19, 20, 21) during collision slots (52), 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 (52), 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 (19, 20, 21) is made likely to prevail in a collision. Priorities are repetitively re-determined and re-assigned, to allocate communications resources among all the devices (22) and piconets (19, 20, 21).