公开(公告)号：US08274910B2

公开(公告)日：2012-09-25

申请号：US12631235

申请日：2009-12-04

申请人： Wai Chen ,  Taek-Jin Kwon ,  Ryokichi Onishi ,  Rama Vuyyuru

发明人： Wai Chen ,  Taek-Jin Kwon ,  Ryokichi Onishi ,  Rama Vuyyuru

IPC分类号： H04L12/26

CPC分类号： H04L43/10 ,  H04L43/0864 ,  H04L45/26 ,  H04L45/54 ,  H04W40/32

摘要： A method and system for determining a size of a local peer group (LPG) network in a dynamic roadway (mobile) environment is provided. In one embodiment, the method comprises measuring a roundtrip time between a first node and a second node, and utilizing the measured roundtrip time to select the size of the local peer group network from a lookup table. In another embodiment, the method comprises determining when the roundtrip time exceeds a time interval of the heartbeat signal, and when the roundtrip time exceeds the time interval of the heartbeat signal adjusting the size of the local peer group network.

摘要翻译： 提供了一种用于在动态道路（移动）环境中确定本地对等群组（LPG）网络的大小的方法和系统。 在一个实施例中，该方法包括测量第一节点和第二节点之间的往返时间，并利用测量的往返时间从查找表中选择本地对等群组网络的大小。 在另一个实施例中，该方法包括确定往返时间何时超过心跳信号的时间间隔，以及当往返时间超过调整本地对等群组网络的大小的心跳信号的时间间隔时。

公开(公告)号：US20110010446A1

公开(公告)日：2011-01-13

申请号：US12500696

申请日：2009-07-10

申请人： Wai Chen ,  Taek-Jin Kwon ,  Ryokichi Onishi ,  Rama Vuyyuru

发明人： Wai Chen ,  Taek-Jin Kwon ,  Ryokichi Onishi ,  Rama Vuyyuru

IPC分类号： G06F15/16

CPC分类号： H04W40/24 ,  G08G1/161 ,  H04L45/026 ,  H04L45/20

摘要： A method for maintaining a local peer group (LPG) for supporting communications among vehicles. The LPG is formed from a plurality of vehicles. Each vehicle is equipped with a wireless communications device. One of the vehicles is selected as a group header node (GH). The method comprises receiving periodically a heartbeat packet from the GH, the heartbeat packet including a maximum hop count, and a heartbeat cycle, forwarding the heartbeat packet until the maximum hop count is reached after waiting for a first random relay delay, which is less than a maximum allowable adjustable value, replying to the heartbeat packet with a membership report packet, forwarding a membership report packet towards the GH, and adding a vehicle that submitted the membership report packet to a LPG membership as a member node of the LPG if the membership report packet is new or updating information for a member node.

摘要翻译： 一种用于维护用于支持车辆之间的通信的本地对等组（LPG）的方法。 LPG由多个车辆形成。 每辆车配备有无线通信设备。 选择其中一种车辆作为组头节点（GH）。 该方法包括周期性地从GH接收心跳分组，心跳分组包括最大跳数和心跳周期，转发心跳分组直到等待第一随机中继延迟之后达到最大跳数，小于等于 最大允许可调整值，回复具有成员报告包的心跳分组，向GH转发成员报告分组，以及如果成员资格，将提交成员报告分组的车辆添加到LPG成员身份作为LPG的成员节点 报告数据包是新的或更新成员节点的信息。