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    3.
    发明专利
    未知

    公开(公告)号：AT426305T

    公开(公告)日：2009-04-15

    申请号：AT01114561

    申请日：2001-06-18

    Applicant: MOTOROLA INC

    Inventor： PERKINS MATTHEW R ,  ALLEN VERNON A ,  O'DEA ROBERT J ,  PALACIOS JUAN C ,  CHEN PRISCILLA L

    IPC: H04W4/00 ,  H04B7/26 ,  H04W72/06 ,  H04W84/08

    Abstract: An adaptive channel access scheme allows for statistics that are collected to be used to group radio users into subgroups according to the desired statistic. The subgroups then utilize channels, separated by time or frequency, to access the communication system (100). The sub-grouping of the radio users is designed to help minimize the chances of channel-access collisions from occurring.

    6.
    发明专利
    未知

    公开(公告)号：DE60137993D1

    公开(公告)日：2009-04-30

    申请号：DE60137993

    申请日：2001-06-18

    Applicant: MOTOROLA INC

    Inventor： PERKINS MATTHEW R ,  ALLEN VERNON A ,  O'DEA ROBERT J ,  PALACIOS JUAN C ,  CHEN PRISCILLA L

    IPC: H04B7/26 ,  H04W4/00 ,  H04W72/06 ,  H04W84/08

    Abstract: An adaptive channel access scheme allows for statistics that are collected to be used to group radio users into subgroups according to the desired statistic. The subgroups then utilize channels, separated by time or frequency, to access the communication system (100). The sub-grouping of the radio users is designed to help minimize the chances of channel-access collisions from occurring.

    7.
    发明专利
    未知

    公开(公告)号：DE112007000206T5

    公开(公告)日：2008-12-11

    申请号：DE112007000206

    申请日：2007-01-08

    Applicant: MOTOROLA INC

    Inventor： HUANG JIAN ,  ALLEN VERNON A ,  NIU FENG ,  SHI QICAI

    IPC: H04L12/28 ,  H04J1/16

    Abstract: During operation a node (500) that has associated with a network (100) will periodically broadcast a beacon (303) during a beacon interval as part of a superframe. The beacon will be periodically broadcast for a first period of time, based on a time it takes for nodes to associate with the network. After the first period of time has passed, the beacon will be switched off for a second period of time, after which, the beacon will again be periodically broadcast.

    9.
    发明专利
    未知

    公开(公告)号：DE10296466T5

    公开(公告)日：2004-04-22

    申请号：DE10296466

    申请日：2002-02-07

    Applicant: MOTOROLA INC

    Inventor： LEE CHUNG-CHIEH ,  HESTER LANCE E ,  O'DEA ROBERT J ,  CHEN PRISCILLA ,  ALLEN VERNON A ,  BOURGOIS MONIQUE J

    IPC: H04L12/56 ,  H04W40/24 ,  H04W40/32 ,  H04L12/28

    Abstract: A network protocol for low-cost, low-power devices coupled to a self-organizing wireless network using a spanning tree backbone architecture is described. In this protocol, physical and logical network construction and maintenance operations, which supports efficient data routing in the network, are performed. The construction phase in conjunction with the maintenance phase insures the self-organizing capability of the network. At the same time, the maintenance operations provide a self-healing mechanism so that the network can recover from node failures and a self-updating mechanism so that the network can expand as more nodes enter the system. Also, the logical backbone hierarchy will facilitate multi-hop communication. The construction of a logical layered spanning tree backbone architecture from an underlying physical topology allows seamless data communication routing between all nodes in the network.

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