Data transmission system phase-lock banedwidth control

    公开(公告)号:AU653792B2

    公开(公告)日:1994-10-13

    申请号:AU1331292

    申请日:1992-01-27

    Applicant: MOTOROLA INC

    Abstract: A data transmission system receiver is disclosed which receives a formatted data stream (302) and operates in one of at least a first bandwidth mode and a second bandwidth mode. The formatted data stream (302) comprises a plurality of data edges (108, 110) and is sampled by a first clock signal (320). A plurality of clock edges (102, 104) defining transitions from one logic state to another is used to define "early" and "late" data edge occurrences. These occurrences are accumulated in accumulators (310, 312) and used as inputs to a clock counter (318) which produces a phase-adjusted clock signal (320). Additionally, the data transmission receiver comprises a detector (330) for detecting when a limited data stream (306) is synchronized with the phase-adjusted clock signal (320) and, in accordance with a predetermined algorithm, is able to switch the phase-lock circuit from the first bandwidth mode to the second bandwidth mode.

    3.
    发明专利
    未知

    公开(公告)号:DE69226074T2

    公开(公告)日:1999-03-11

    申请号:DE69226074

    申请日:1992-01-27

    Applicant: MOTOROLA INC

    Abstract: A data transmission system receiver is disclosed which receives a formatted data stream (302) and operates in one of at least a first bandwidth mode and a second bandwidth mode. The formatted data stream (302) comprises a plurality of data edges (108, 110) and is sampled by a first clock signal (320). A plurality of clock edges (102, 104) defining transitions from one logic state to another is used to define "early" and "late" data edge occurrences. These occurrences are accumulated in accumulators (310, 312) and used as inputs to a clock counter (318) which produces a phase-adjusted clock signal (320). Additionally, the data transmission receiver comprises a detector (330) for detecting when a limited data stream (306) is synchronized with the phase-adjusted clock signal (320) and, in accordance with a predetermined algorithm, is able to switch the phase-lock circuit from the first bandwidth mode to the second bandwidth mode.

    DATA TRANSMISSION SYSTEM RECEIVER HAVING PHASE-INDEPENDENT BANDWIDTH CONTROL

    公开(公告)号:AU1331292A

    公开(公告)日:1992-09-07

    申请号:AU1331292

    申请日:1992-01-27

    Applicant: MOTOROLA INC

    Abstract: A data transmission system receiver is disclosed which receives a formatted data stream (302) and operates in one of at least a first bandwidth mode and a second bandwidth mode. The formatted data stream (302) comprises a plurality of data edges (108, 110) and is sampled by a first clock signal (320). A plurality of clock edges (102, 104) defining transitions from one logic state to another is used to define "early" and "late" data edge occurrences. These occurrences are accumulated in accumulators (310, 312) and used as inputs to a clock counter (318) which produces a phase-adjusted clock signal (320). Additionally, the data transmission receiver comprises a detector (330) for detecting when a limited data stream (306) is synchronized with the phase-adjusted clock signal (320) and, in accordance with a predetermined algorithm, is able to switch the phase-lock circuit from the first bandwidth mode to the second bandwidth mode.

    Method and apparatus for improving hard handoffs in cdma systems

    公开(公告)号:AU2003304713A8

    公开(公告)日:2005-10-07

    申请号:AU2003304713

    申请日:2003-12-05

    Applicant: MOTOROLA INC

    Abstract: A method of improving hard handoffs in a communication system comprising a source base station (BS) 114 , a target BS 106 and a mobile switching center (MSC) 104 . In particular, when a handoff is needed, a requested service option and a list of service options supported by a mobile station (MS) 202 are communicated from the source BS to the target BS. Upon receiving a handoff request message, the target base station selects either the requested service option or an alternate service option. The alternate service option is chosen based on one or more of the MS's service option capabilities, service option priorities, and resources available in the target BS. The selected service option is communicated to the source BS and the MS.

    DATA TRANSMISSION SYSTEM RECEIVER HAVING PHASE-INDEPENDENT BANDWIDTH CONTROL

    公开(公告)号:CA2099382C

    公开(公告)日:1998-11-24

    申请号:CA2099382

    申请日:1992-01-27

    Applicant: MOTOROLA INC

    Abstract: A data transmission system receiver is disclosed which receives a formatted data stream (302) and operates in one of at least a first bandwidth mode and a second bandwidth mode. The formatted data str eam (302) comprises a plurality of data edges (108, 110) and is sampled by a first clock signal (320). A plurality of clock ed ges (102, 104) defining transitions from one logic state to another is used to define "early" and "late" data edge occurrences. The se occurrences are accumulated in accumulators (310, 312) and used as inputs to a clock counter (318) which produces a phase-ad justed clock signal (320). Additionally, the data transmission receiver comprises a detector (330) for detecting when a limited da ta stream (306) is synchronized with the phase-adjusted clock signal (320) and, in accordance with a predetermined algorithm, is able to switch the phase-lock circuit from the first bandwidth mode to the second bandwidth mode.

    7.
    发明专利
    未知

    公开(公告)号:DE69226074D1

    公开(公告)日:1998-08-06

    申请号:DE69226074

    申请日:1992-01-27

    Applicant: MOTOROLA INC

    Abstract: A data transmission system receiver is disclosed which receives a formatted data stream (302) and operates in one of at least a first bandwidth mode and a second bandwidth mode. The formatted data stream (302) comprises a plurality of data edges (108, 110) and is sampled by a first clock signal (320). A plurality of clock edges (102, 104) defining transitions from one logic state to another is used to define "early" and "late" data edge occurrences. These occurrences are accumulated in accumulators (310, 312) and used as inputs to a clock counter (318) which produces a phase-adjusted clock signal (320). Additionally, the data transmission receiver comprises a detector (330) for detecting when a limited data stream (306) is synchronized with the phase-adjusted clock signal (320) and, in accordance with a predetermined algorithm, is able to switch the phase-lock circuit from the first bandwidth mode to the second bandwidth mode.

    METHOD AND APPARATUS FOR IMPROVING HARD HANDOFFS IN CDMA SYSTEMS

    公开(公告)号:CA2510041C

    公开(公告)日:2012-01-24

    申请号:CA2510041

    申请日:2003-12-05

    Applicant: MOTOROLA INC

    Abstract: A method of improving hard handoffs in a communication system comprising a source base station (BS) 114, a target BS 106 and a mobile switching center (MSC) 104. In particular, when a handoff is needed, a requested service option and a list of service options supported by a mobile station (MS) 202 are communicated from the source BS to the target BS. Upon receiving a handoff request message, the target base station selects either the requested service option or an alternate service option. The alternate service option is chosen based on one or more of the MS's service option capabilities, service option priorities, and resources available in the target BS. The selected service option is communicated to the source BS and the MS.

    METHOD AND APPARATUS FOR IMPROVING HARD HANDOFFS IN CDMA SYSTEMS

    公开(公告)号:CA2510041A1

    公开(公告)日:2004-06-06

    申请号:CA2510041

    申请日:2003-12-05

    Applicant: MOTOROLA INC

    Abstract: A method of improving hard handoffs in a communication system comprising a source base station (BS) 114, a target BS 106 and a mobile switching center (MSC) 104. In particular, when a handoff is needed, a requested service option and a list of service options supported by a mobile station (MS) 202 are communicated from the source BS to the target BS. Upon receiving a handoff request message, the target base station selects either the requested service option or an alternate service option. The alternate service option is chosen based on one or more of the MS's service option capabilities, service option priorities, and resources available in the target BS. The selected service option is communicated to the source BS and the MS.

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