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    METHOD AND APPARATUS FOR TRANSFERRING A RADIOTELEPHONE CALL FROM ONE COVERAGE AREA TO ANOTHER
    1.
    发明专利
    METHOD AND APPARATUS FOR TRANSFERRING A RADIOTELEPHONE CALL FROM ONE COVERAGE AREA TO ANOTHER 未知

    公开(公告)号：CA2142020A1

    公开(公告)日：1995-01-12

    申请号：CA2142020

    申请日：1994-06-08

    Applicant: MOTOROLA INC

    Inventor： LODWIG JOHN P ,  FELIX KENNETH A ,  WHITTINGTON CHARLES L

    IPC: H04B7/26 ,  H04W36/12

    Abstract: Handoff between coverage areas is achieved in a radiotelephone system coupled to standard wireline switches. Upon initiation of a radiotelephone call in one radio coverage area, a directory number and radio call identifier (203) are downloaded to the subscriber unit (101) from a fixed control unit (111) associated with the coverage area. When the subscriber unit determines a handoff to a target radio coverage area is desirable, it transmits the directory number and radio call identifier to another fixed control unit (113) associated with the target radio coverage area. This fixed control unit calls the directory number and is coupled to the first fixed control unit via the standard wireline switch (115, 117). The radio call identifier is then sent to the first fixed control unit to enable the proper connection for handoff.

    3.
    发明专利
    未知

    公开(公告)号：FI950967A0

    公开(公告)日：1995-03-02

    申请号：FI950967

    申请日：1995-03-02

    Applicant: MOTOROLA INC

    Inventor： LODWIG JOHN PHILLIP ,  FELIX KENNETH A ,  WHITTINGTON CHARLES L

    IPC: H04B7/26 ,  H04W36/12 ,  H04Q

    Abstract: A method of transferring a user message-conveying radiotelephone call by a subscriber unit from a first radio coverage area, served by a first fixed control unit which is coupled to a wireline telephone switch, to a second radio coverage area served by a second fixed control unit, includes transmitting a directory number, associated with the first fixed control unit and the wireline telephone switch, the directory number identifying a wireline telephone number of the first fixed control unit, from the first fixed control unit to the subscriber unit; storing the transmitted directory number at the subscriber unit; transmitting the stored directory number from the subscriber unit to the second fixed control unit when a need for transfer of the radiotelephone call to the second fixed control unit from the first fixed control unit is determined; calling the transmitted directory number from the second fixed control unit; in response to the calling of the directory number, connecting the second fixed control unit to the first fixed control unit via the wireline telephone switch; and transferring control of the radiotelephone call from the first fixed control unit to the second fixed control unit by dialing the transmitted directory number from the second fixed control unit.

    4.
    发明专利
    未知

    公开(公告)号：FI950967A

    公开(公告)日：1995-03-02

    申请号：FI950967

    申请日：1995-03-02

    Applicant: MOTOROLA INC

    Inventor： LODWIG JOHN PHILLIP ,  FELIX KENNETH A ,  WHITTINGTON CHARLES L

    IPC: H04B7/26 ,  H04W36/12 ,  H04Q

    Abstract: A method of transferring a user message-conveying radiotelephone call by a subscriber unit from a first radio coverage area, served by a first fixed control unit which is coupled to a wireline telephone switch, to a second radio coverage area served by a second fixed control unit, includes transmitting a directory number, associated with the first fixed control unit and the wireline telephone switch, the directory number identifying a wireline telephone number of the first fixed control unit, from the first fixed control unit to the subscriber unit; storing the transmitted directory number at the subscriber unit; transmitting the stored directory number from the subscriber unit to the second fixed control unit when a need for transfer of the radiotelephone call to the second fixed control unit from the first fixed control unit is determined; calling the transmitted directory number from the second fixed control unit; in response to the calling of the directory number, connecting the second fixed control unit to the first fixed control unit via the wireline telephone switch; and transferring control of the radiotelephone call from the first fixed control unit to the second fixed control unit by dialing the transmitted directory number from the second fixed control unit.

    Improved synchronization technique
    6.
    发明专利
    Improved synchronization technique 未知

    公开(公告)号：GB2241411A

    公开(公告)日：1991-08-28

    申请号：GB9104085

    申请日：1991-02-27

    Applicant: MOTOROLA INC

    Inventor： WHITTINGTON CHARLES L ,  SPEAR STEPHEN L

    IPC: H04J3/06

    Abstract: An improved synchronization technique is provided that may be used to synchronize outlying "downstream" nodes in a cellular radio telephone system to a master node. According to the invention, the master node starts a timer while simultaneously sending a predetermined signal known as a "token" to a target node. Upon receipt of the token, the target starts a timer and stores the token. The target then waits for the next available time when it can return the token to the master. When it later returns the token to the master, the target stops its timer, thereby generating a "holding time" for the token. Upon receipt of the token, the master stops its timer, thereby generating an "elapsed time" for the token. The time delay for the channel interconnecting a target and the master may then be computed as one-half the difference between the elapsed time and the holding time. Moreover, based on this time delay information, the target may then be synchronized to the master.

    METHOD OF TRANSFERRING A RADIOTELEPHONE CALL FROM A GIVEN RANGE AREA INTO ANOTHER ONE
    7.
    发明专利
    METHOD OF TRANSFERRING A RADIOTELEPHONE CALL FROM A GIVEN RANGE AREA INTO ANOTHER ONE 未知

    公开(公告)号：PL174337B1

    公开(公告)日：1998-07-31

    申请号：PL30756594

    申请日：1994-06-08

    Applicant: MOTOROLA INC

    Inventor： LODWIG JOHN P ,  FELIX KENNETH A ,  WHITTINGTON CHARLES L

    IPC: H04B7/26 ,  H04W36/12 ,  H04M11/00 ,  H04B7/24 ,  H04Q7/20

    Abstract: A method of transferring a user message-conveying radiotelephone call by a subscriber unit from a first radio coverage area, served by a first fixed control unit which is coupled to a wireline telephone switch, to a second radio coverage area served by a second fixed control unit, includes transmitting a directory number, associated with the first fixed control unit and the wireline telephone switch, the directory number identifying a wireline telephone number of the first fixed control unit, from the first fixed control unit to the subscriber unit; storing the transmitted directory number at the subscriber unit; transmitting the stored directory number from the subscriber unit to the second fixed control unit when a need for transfer of the radiotelephone call to the second fixed control unit from the first fixed control unit is determined; calling the transmitted directory number from the second fixed control unit; in response to the calling of the directory number, connecting the second fixed control unit to the first fixed control unit via the wireline telephone switch; and transferring control of the radiotelephone call from the first fixed control unit to the second fixed control unit by dialing the transmitted directory number from the second fixed control unit.

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