公开(公告)号：US08335193B2

公开(公告)日：2012-12-18

申请号：US12804058

申请日：2010-07-13

申请人： Amit Shukla ,  Shashidhar Gandham ,  Jinu Kurian

发明人： Amit Shukla ,  Shashidhar Gandham ,  Jinu Kurian

IPC分类号： H04W4/00

CPC分类号： H04W36/30 ,  H04W36/08 ,  H04W48/08

摘要： In wireless networks where multiple base stations are deployed, handsets may handoff from one base station to the other while in a voice call. In this disclosure a layer-2 hand-off mechanism for cellular systems designed to operate in unlicensed spectrum is described. More specifically a proposed method that does not use any pre-determined thresholds to initiate the hand-offs is disclosed.

摘要翻译： 在部署多个基站的无线网络中，在语音呼叫中，手机可以从一个基站切换到另一个基站。 在本公开中，描述了被设计为在未许可频谱中操作的蜂窝系统的二层切换机制。 更具体地，公开了一种不使用任何预定阈值来启动切换的方法。

公开(公告)号：US20070140149A1

公开(公告)日：2007-06-21

申请号：US11314616

申请日：2005-12-20

申请人： Shashidhar Gandham ,  Ying Zhang ,  Qingfeng Huang

发明人： Shashidhar Gandham ,  Ying Zhang ,  Qingfeng Huang

IPC分类号： H04L12/28

CPC分类号： H04L43/00 ,  H04L43/0888 ,  H04W84/18

摘要： One embodiment of the present invention provides a system that optimizes packet transmissions during a convergecast operation in a convergecast network. During operation, the system receives a request to perform the convergecast operation in the convergecast network. This convergecast network includes a base-station and a plurality of nodes, wherein during the convergecast operation the plurality of nodes communicate packets to the base-station. In response to the request, the system constructs a convergecast-tree, which includes the base-station and the plurality of nodes, based on hop counts from the plurality of nodes to the base-station. Next, the system linearizes the convergecast-tree so that the convergecast-tree contains a plurality of linear branches. The system then schedules packet transmission for each of the linear branches and each node in each branch based on a set of predetermined criteria to obtain a scheduled order. Finally, the system performs packet transmissions in the convergecast-tree using the scheduled order. Note that performing the convergecast operation in this way substantially optimizes the convergecast operation by reducing a total number of timeslots required to complete the convergecast operation.

摘要翻译： 本发明的一个实施例提供了一种在收敛网络中的收敛过程中优化分组传输的系统。 在运行期间，系统接收到在Convergecast网络中执行Convergecast操作的请求。 该Convergecast网络包括基站和多个节点，其中在Convergecast操作期间，多个节点向基站传送分组。 响应于该请求，系统基于从多个节点到基站的跳数来构建包括基站和多个节点的Convergecast-tree。 接下来，系统使收敛树线性化，使得收敛树包含多个线性分支。 然后，系统基于一组预定标准来调度每个分支中的每个线性分支和每个节点的分组传输以获得调度顺序。 最后，系统使用调度顺序在convergecast-tree中执行分组传输。 注意，以这种方式执行Convergecast操作通过减少完成Convergecast操作所需的时隙的总数大大优化了Convergecast操作。

公开(公告)号：US08351782B1

公开(公告)日：2013-01-08

申请号：US13303975

申请日：2011-11-23

申请人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

发明人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

IPC分类号： H04B10/08

CPC分类号： H04B10/0771

摘要： A system and method of detecting polarity inversion in an optical switching circuit is disclosed. The method includes performing a first round of a port verification process on at least two optical ports, transmitting a payload from at least one optical port in the at least two optical ports, determining if the payload was received at a second optical port in the at least two optical ports, assigning a pair of ports to a first group in the case that the predetermined payload was communicated between the pair of ports, and assigning a pair of ports to a second group in the case that the predetermined payload was not communicated between the pair of ports. The method also includes determining that either the first group of ports or the second group of ports has inverted polarity.

公开(公告)号：US20110013599A1

公开(公告)日：2011-01-20

申请号：US12804058

申请日：2010-07-13

申请人： Amit Shukla ,  Shashidhar Gandham ,  Jinu Kurian

发明人： Amit Shukla ,  Shashidhar Gandham ,  Jinu Kurian

IPC分类号： H04W36/30

CPC分类号： H04W36/30 ,  H04W36/08 ,  H04W48/08

摘要： In wireless networks where multiple base stations are deployed, handsets may handoff from one base station to the other while in a voice call. In this disclosure a layer-2 hand-off mechanism for cellular systems designed to operate in unlicensed spectrum is described. More specifically a proposed method that does not use any pre-determined thresholds to initiate the hand-offs is disclosed.

摘要翻译： 在部署多个基站的无线网络中，在语音呼叫中，手机可以从一个基站切换到另一个基站。 在本公开中，描述了被设计为在未许可频谱中操作的蜂窝系统的二层切换机制。 更具体地，公开了一种不使用任何预定阈值来启动切换的方法。

公开(公告)号：US08355630B1

公开(公告)日：2013-01-15

申请号：US13475667

申请日：2012-05-18

申请人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

发明人： Amin Vahdat ,  Leon Poutievski ,  Shashidhar Gandham

IPC分类号： H04B10/08

CPC分类号： H04B10/0771

摘要： A system and method of detecting polarity inversion in an optical switching circuit is disclosed. The method includes performing a first round of a port verification process on at least two optical ports, transmitting a payload from at least one optical port in the at least two optical ports, determining if the payload was received at a second optical port in the at least two optical ports, assigning a pair of ports to a first group in the case that the predetermined payload was communicated between the pair of ports, and assigning a pair of ports to a second group in the case that the predetermined payload was not communicated between the pair of ports. The method also includes determining that either the first group of ports or the second group of ports has inverted polarity.

摘要翻译： 公开了一种在光开关电路中检测极性反转的系统和方法。 该方法包括在至少两个光学端口上执行端口验证过程的第一轮，从至少两个光学端口中的至少一个光学端口传输有效载荷，确定有效载荷是否在第二个光学端口处被接收 至少两个光学端口，在所述预定有效负载在所述一对端口之间通信的情况下，将一对端口分配给第一组，并且在所述预定有效载荷不在第二组之间传送的情况下，将一对端口分配给第二组 这对端口。 该方法还包括确定第一组端口或第二组端口具有反相极性。