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    • 42. 发明授权
    • Method and device for detaching user equipment
    • 拆卸用户设备的方法和设备
    • US08619712B2
    • 2013-12-31
    • US12971612
    • 2010-12-17
    • Yijun YuQian Zhang
    • Yijun YuQian Zhang
    • H04W4/00H04W40/00H04M1/00
    • H04W60/06H04W36/0022H04W36/14H04W76/30H04W76/32H04W76/34
    • A method and device for detaching a user equipment (UE) are disclosed in the present invention. The UE is registered with a mobility management entity (MME) in a packet switched (PS) network and a mobile switching center (MSC) in a circuit switched (CS) network. When the UE needs to detach from the PS network, the MSC receives a Detach Request with a Detach Type indicating the detaching from the PS network only; after receiving the Detach Request, the MSC deletes the context of the PS core network entity and clears the connection between the MSC and the MME. An MME for performing UE detachment is also disclosed in the present invention. The present invention helps reduce the time delay during the subsequent handover and quickly provide users with communications services, so as to improve user's experience and meet the carriers' requirements.
    • 在本发明中公开了一种用于分离用户设备(UE)的方法和设备。 UE被分配交换(PS)网络中的移动性管理实体(MME)和电路交换(CS)网络中的移动交换中心(MSC))注册。 当UE需要从PS网络分离时,MSC接收到具有分离类型的分离请求,指示仅从PS网络分离; MSC收到分离请求后,删除PS核心网实体的上下文,并清除MSC与MME之间的连接。 在本发明中还公开了用于执行UE分离的MME。 本发明有助于减少后续切换期间的时延,并迅速为用户提供通信服务,从而提高用户体验并满足运营商的需求。
    • 45. 发明申请
    • Delay-constrained and energy-efficient online routing for asynchronous sensor networks
    • 用于异步传感器网络的延迟约束和节能的在线路由
    • US20120218926A1
    • 2012-08-30
    • US13034573
    • 2011-02-24
    • Xinguo WangQian Zhang
    • Xinguo WangQian Zhang
    • H04W52/02H04W4/00
    • H04W40/005H04W52/0216H04W52/0219H04W84/18H04W88/04Y02D30/20Y02D70/144Y02D70/164Y02D70/22
    • The described method and system provide an efficient routing of data packets protocol in an event-driven and delay-constrained WSN (wireless sensor network) that optimizes the sleep/wake schedule of nodes to maximize the lifetime of the WSM, subject to a constraint on the source-to-sink delay. Online forwarding techniques may be used to transfer data reports from monitoring nodes to the sink. A delay-constrained and energy-efficient routing protocol (DCEER) for asynchronous WSNs may be used to maximize the lifetime of the WSN while remaining within the maximum allowable delay requirements. With DCEER, each node may maintain the historical cost of forwarding a packet from itself to the sink as its virtual coordinate, and packets are forwarded in the direction of descending coordinates. The cost-based coordinates may change dynamically with a time-varying channel or topology. Nodes may apply a relay-selection scheme to choose a next-hop relay from a set of multiple potential relay candidates, based on a tradeoff between forwarding energy consumption (FEC) and waiting costs. The optimal stopping time for the relay-selection process may be determined based on expected forwarding and waiting costs, and the nodes may operate according to an optimal sleep/wake schedule based on waiting costs and expected traffic flow.
    • 所描述的方法和系统在事件驱动和延迟约束的WSN(无线传感器网络)中提供数据分组协议的有效路由,其优化节点的睡眠/唤醒调度以使WSM的寿命最大化,受限于 源到宿延迟。 在线转发技术可用于将数据报告从监控节点传输到接收器。 可以使用用于异步WSN的延迟约束和节能路由协议(DCEER)来使WSN的寿命最大化,同时保持在最大允许延迟要求内。 使用DCEER,每个节点可以保持将数据包从自身转发到接收器的历史成本作为其虚拟坐标,并且数据包沿降序坐标方向转发。 基于成本的坐标可以随时间变化的信道或拓扑动态地改变。 节点可以基于转发能量消耗(FEC)和等待成本之间的折衷来应用中继选择方案来从一组多个潜在中继候选中选择下一跳中继。 可以基于期望的转发和等待成本来确定中继选择过程的最佳停止时间,并且节点可以基于等待成本和预期业务流量根据最佳睡眠/唤醒调度进行操作。
    • 48. 发明授权
    • Usage of poly-3-hydroxybutyrates in preparation of β-lactam compounds
    • 聚-3-羟基丁酸酯在制备β-内酰胺化合物中的用途
    • US07985857B2
    • 2011-07-26
    • US12280781
    • 2006-10-16
    • Weichuan LuQian ZhangXin Cheng
    • Weichuan LuQian ZhangXin Cheng
    • C07D205/08C07F7/18
    • C07D205/08C07F7/188
    • A method for preparing compounds having the formula(I) by using P(3HB), wherein R is R1, R2, R3 are lower linear or branched C1-C4 alkyl, comprising the steps of: a: obtaining (3R)-3-RO—CH(CH3)CH2COOCH3 by pyrolysis of P(3HB) and protection; b: obtaining (3R)-3-RO—CH(CH3)CH2CHO by reduction of (3R)-3-RO—CH(CH3)CH2COOCH3 ; c: enolizing (3R)-3-RO—CH(CH3)CH2CHO and then reacting with chlorosulfonyl isocyanate, at last getting the final product by reduction; wherein (3R)-3-RO—CH(CH3)CH2CHO is enolized by reacting (3R)-3-RO—CH(CH3)CH2CHO with isopropenyl acetate and p-toluenesulfonic acid by heating under reflux.
    • 通过使用P(3HB)制备具有式(I)的化合物的方法,其中R为R 1,R 2,R 3为低级直链或支链C 1 -C 4烷基,包括以下步骤:a:获得(3R)-3- RO-CH(CH3)CH2COOCH3通过热解P(3HB)和保护; b:通过还原(3R)-3 -OR-CH(CH3)CH2COOCH3获得(3R)-3 -OR-CH(CH 3)CH 2 CHO; c:烯化(3R)-3 -OR-CH(CH 3)CH 2 CHO,然后与氯磺酰基异氰酸酯反应,最后通过还原得到最终产物; 其中通过在回流下加热使(3R)-3 -OR-CH(CH 3)CH 2 CHO与乙酸异丙烯酯和对甲苯磺酸反应来使(3R)-3 -OR-CH(CH 3)CH 2 CHO烯醇化。
    • 50. 发明申请
    • METHOD AND DEVICE FOR DETACHING USER EQUIPMENT
    • 用于分离用户设备的方法和设备
    • US20110085517A1
    • 2011-04-14
    • US12971612
    • 2010-12-17
    • Yijun YuQian Zhang
    • Yijun YuQian Zhang
    • H04W36/00
    • H04W60/06H04W36/0022H04W36/14H04W76/30H04W76/32H04W76/34
    • A method and device for detaching a user equipment (UE) are disclosed in the present invention. The UE is registered with a mobility management entity (MME) in a packet switched (PS) network and a mobile switching center (MSC) in a circuit switched (CS) network. When the UE needs to detach from the PS network, the MSC receives a Detach Request with a Detach Type indicating the detaching from the PS network only; after receiving the Detach Request, the MSC deletes the context of the PS core network entity and clears the connection between the MSC and the MME. An MME for performing UE detachment is also disclosed in the present invention. The present invention helps reduce the time delay during the subsequent handover and quickly provide users with communications services, so as to improve user's experience and meet the carriers' requirements.
    • 在本发明中公开了一种用于分离用户设备(UE)的方法和设备。 UE被分配交换(PS)网络中的移动性管理实体(MME)和电路交换(CS)网络中的移动交换中心(MSC))注册。 当UE需要从PS网络分离时,MSC接收到具有分离类型的分离请求,指示仅从PS网络分离; MSC收到分离请求后,删除PS核心网实体的上下文,并清除MSC与MME之间的连接。 在本发明中还公开了用于执行UE分离的MME。 本发明有助于减少后续切换期间的时延,并迅速为用户提供通信服务,从而提高用户体验并满足运营商的需求。