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    Method and apparatus for the generation of frequency hopping sequences
    31.
    发明专利
    Method and apparatus for the generation of frequency hopping sequences 未知

    公开(公告)号：AU742706B2

    公开(公告)日：2002-01-10

    申请号：AU9469898

    申请日：1998-10-06

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HAARTSEN JACOBUS

    IPC: H04B1/713 ,  H04B1/7143

    Abstract: A frequency hopping generator comprises an XOR processing module and a PERM (permutation) processing module arranged in series. The XOR and PERM modules act directly on input clock lines as a function of a selection address. The hopping number sequence generated by the frequency hopping generator can be changed in real-time by changing the selection addresses, while the phase of the sequence can be changed in real-time by changing the clock value on the clock lines. The frequency generator finds exemplary use in rapidly switching between different piconets in a wireless scatter network.

    Access technique of channel hopping communications systems.
    32.
    发明专利
    Access technique of channel hopping communications systems. 未知

    公开(公告)号：ZA200102550B

    公开(公告)日：2001-10-09

    申请号：ZA200102550

    申请日：2001-03-28

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HAARTSEN JACOBUS

    IPC: H04B1/713 ,  H04J13/00 ,  H04W52/02 ,  H04W68/00 ,  H04Q

    Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock. The generation of page trains can be further optimized for those cases in which more than two page trains will be transmitted. The purpose of the optimization is to generate page trains that, when transmitted, are most likely to elicit an early response from the paged unit.

    Access technique of channel hopping communications system
    35.
    发明专利
    Access technique of channel hopping communications system 未知

    公开(公告)号：AU1303300A

    公开(公告)日：2000-05-01

    申请号：AU1303300

    申请日：1999-10-01

    Applicant: ERICSSON TELEFON AB L M

    Inventor： HAARTSEN JACOBUS

    IPC: H04B1/713 ,  H04J13/00 ,  H04W52/02 ,  H04W68/00 ,  H04Q7/32

    Abstract: Establishing a connection between a paging unit and a standby unit in a channel hopping communications system includes activating the standby unit for an activation time period out of every standby time period. During each activation time period, the standby unit monitors a selected channel for receipt of a paging message. The selected channel is selected from a plurality of channels, and, for each subsequent activation time period, the selected channel is a subsequent one of the plurality of channels as specified by a hopping sequence and an internal clock. A page train is repeatedly transmitted from the paging unit to the standby unit, until a response is received from the standby unit. Each page train includes a plurality of paging messages, each paging message being transmitted on a different one of a subset of the plurality of channels. Selection of a page train for transmission by the paging unit may be based on an estimate of the standby unit's internal clock. The generation of page trains can be further optimized for those cases in which more than two page trains will be transmitted. The purpose of the optimization is to generate page trains that, when transmitted, are most likely to elicit an early response from the paged unit.

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