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    • 5. 发明授权
    • Method and system for applying an MPLS network to support QoS in GPRS
    • 应用MPLS网络支持GPRS中的QoS的方法和系统
    • US07283523B2
    • 2007-10-16
    • US10601665
    • 2003-06-24
    • Chien-Hsin WangJen-Shun YangChien-Chao TsengJen-Chi LiuJui-Tang Wang
    • Chien-Hsin WangJen-Shun YangChien-Chao TsengJen-Chi LiuJui-Tang Wang
    • H04L12/28H04L12/56
    • H04L47/825H04L45/507H04L47/14H04L47/16H04L47/70H04L47/724H04L47/767H04L47/824
    • A method and system for applying a multi-protocol label switching (MPLS) network to support QoS in general packet radio service (GPRS) is disclosed. An E-LSP tunnel with reserved bandwidth is pre-configured between Gateway GPRS Support Node (GGSN) and each Service GPRS Support Node (SGSN), and between any two SGSNs. Before an Mobile Station (MS) wishes to transmit or receive packets, it need to ask its designated SSGN for establishing an on-demand L-LSP from the SGSN to the Corresponding Node (CN). This L-LSP is required to tunnel through the pre-configured E-LSP that was mentioned above and here we apply the label stack technique from MPLS. Therefore, the packets of the on-demand L-LSP can be tunneled through the pre-configured E-LSP to the SGSN in which the MS is located, and then the SGSN is able to recognize and locate the mobile station according to the corresponding label in on-demand L-LSP.
    • 公开了一种应用多协议标签交换(MPLS)网络来支持通用分组无线业务(GPRS)中的QoS的方法和系统。 具有保留带宽的E-LSP隧道在网关GPRS支持节点(GGSN)和每个服务GPRS支持节点(SGSN)之间以及任何两个SGSN之间预先配置。 在移动台(MS)希望发送或接收分组之前,需要向其指定的SSGN请求建立从SGSN到对应节点(CN)的按需L-LSP。 这个L-LSP需要通过上面提到的预先配置的E-LSP进行隧道传输,这里我们应用MPLS的标签栈技术。 因此,可以通过预先配置的E-LSP将按需L-LSP的报文隧道发送到MS所在的SGSN,然后SGSN能够根据相应的认证和定位移动台 标签在按需L-LSP。
    • 9. 发明申请
    • ROUTING METHOD AND ROUTING PATH RECOVERY MECHANISM IN WIRELESS SENSOR NETWORK ENVIRONMENT
    • 无线传感器网络环境中的路由方法和路由恢复机制
    • US20100260071A1
    • 2010-10-14
    • US12485113
    • 2009-06-16
    • Jun-Yu LAIKuei-Li HuangJui-Tang WangChien-Chao TsengChao-Nan Wu
    • Jun-Yu LAIKuei-Li HuangJui-Tang WangChien-Chao TsengChao-Nan Wu
    • H04L12/28H04B7/14
    • H04W40/02H04L45/22H04L45/28H04W40/248
    • The present invention discloses an asymmetric routing method and routing path recovery mechanism. The wireless sensor network environment includes at least a management unit, at least a gateway, and mobile nodes. When joining, each mobile node obtains an unique ID code and, additionally, a depth as the gradient to the management unit. Accordingly, a mobile node sends an uplink packet via a nearby node with lower depth to the management unit; while the management unit transmits a downlink packet to a mobile node by utilizing the source route method. When the parent node of a mobile node is damaged or moves to another position or said mobile node with its sub-tree descendants changes their position together, the uplink routing path is recovered via selecting a nearby node of the sub-tree as relay node and the downlink routing path is recovered via sending a control message to the management unit.
    • 本发明公开了一种不对称路由选择方法和路由恢复机制。 无线传感器网络环境至少包括管理单元,至少网关和移动节点。 当加入时,每个移动节点获得唯一的ID码,并且另外获得作为管理单元的梯度的深度。 因此,移动节点经由具有较低深度的附近节点向管理单元发送上行链路分组; 而管理单元通过利用源路由方法向移动节点发送下行链路分组。 当移动节点的父节点被损坏或移动到另一位置或者其子树后代的移动节点将它们的位置一起改变时,通过选择子树的附近节点作为中继节点来恢复上行链路路由路径, 通过向管理单元发送控制消息来恢复下行链路路由路径。