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    REUSE OF A PHYSICAL CONTROL CHANNEL IN A DISTRIBUTED CELLULAR RADIO COMMUNICATION SYSTEM
    1.
    发明申请
    REUSE OF A PHYSICAL CONTROL CHANNEL IN A DISTRIBUTED CELLULAR RADIO COMMUNICATION SYSTEM 审中-公开
    分布式细胞无线电通信系统中的物理控制信道的重用

    公开(公告)号：WO9857513A2

    公开(公告)日：1998-12-17

    申请号：PCT/SE9800874

    申请日：1998-05-12

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WIOREK JONAS ,  FRODIGH MAGNUS ,  BEMING PER ,  WALLSTEDT KENNETH

    IPC: H04W72/04 ,  H04W74/08 ,  H04Q7/36 ,  H04Q7/38

    CPC classification number: H04W74/002

    Abstract: The present invention relates to the reuse of a control channel in a distributed cellular radio communication system. At least one physical channel, the so-called physical control channel, in the radio communication system is used for transferring logical control channels. According to the present invention, the physical uplink control channel can be reused with respect to logical control channels comprising an access request. The physical downlink control channel can be reused with respect to logical control channels comprising a message that access is granted to a mobile station or a message that someone requests contact with a mobile station. According to the invention, the physical uplink control channel and/or the physical downlink control channel is reused. This means that more connections per time unit may be established in the radio communication system.

    Abstract translation: 本发明涉及分布式蜂窝无线电通信系统中控制信道的重用。 无线电通信系统中的至少一个物理信道（即所谓的物理控制信道）用于传送逻辑控制信道。 根据本发明，物理上行链路控制信道可以相对于包括访问请求的逻辑控制信道被重用。 物理下行链路控制信道可以相对于逻辑控制信道重复使用，逻辑控制信道包括向移动台授予接入的消息或者有人请求与移动台接触的消息。 根据本发明，物理上行链路控制信道和/或物理下行链路控制信道被重用。 这意味着可以在无线电通信系统中建立每个时间单元的更多连接。

    4.
    发明专利
    未知

    公开(公告)号：DE69634120D1

    公开(公告)日：2005-02-03

    申请号：DE69634120

    申请日：1996-03-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WALLSTEDT KENNETH ,  ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  ANDERSSON H KAN

    IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36

    Abstract: In a cellular communication system, a method and apparatus are provided for allocating a channel for use on a connection between a base station and a mobile station in a cell, without making measurements of downlink interference. Throughout the system, uplink and downlink power levels are regulated so that, within each cell, their sum changes by an amount whose magnitude is substantially equal to the magnitude of change in path gain between the mobile station and the base station in that cell, and which sum is opposite in sign to the amount of change in path gain. This power regulation scheme assures that there will be a strong correlation between system-wide measurements of uplink and downlink interference. Therefore, with the power regulation scheme in place, each cell determines uplink carrier to interference (C/I) ratios for the free channels available for use in the cell and selects an acceptable free channel having a C/I value that is within a predetermined acceptable range. If uplink C/I on the acceptable free channel is greater than the uplink C/I value of a channel currently assigned to a connection, then an intra-cell handover is performed so that the connection will be reassigned to the acceptable free channel. This technique is useful for providing an adaptive channel allocation scheme to systems, such as analog cellular communications systems, in which downlink interference measurements cannot be made.

    Method and apparatus for adaptive channel allocation with power control in a mobile communications system
    5.
    发明专利
    Method and apparatus for adaptive channel allocation with power control in a mobile communications system 未知

    公开(公告)号：AU5130896A

    公开(公告)日：1996-10-08

    申请号：AU5130896

    申请日：1996-03-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WALLSTEDT KENNETH ,  ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  ANDERSSON HIKAN

    IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36

    Abstract: In a cellular communication system, a method and apparatus are provided for allocating a channel for use on a connection between a base station and a mobile station in a cell, without making measurements of downlink interference. Throughout the system, uplink and downlink power levels are regulated so that, within each cell, their sum changes by an amount whose magnitude is substantially equal to the magnitude of change in path gain between the mobile station and the base station in that cell, and which sum is opposite in sign to the amount of change in path gain. This power regulation scheme assures that there will be a strong correlation between system-wide measurements of uplink and downlink interference. Therefore, with the power regulation scheme in place, each cell determines uplink carrier to interference (C/I) ratios for the free channels available for use in the cell and selects an acceptable free channel having a C/I value that is within a predetermined acceptable range. If uplink C/I on the acceptable free channel is greater than the uplink C/I value of a channel currently assigned to a connection, then an intra-cell handover is performed so that the connection will be reassigned to the acceptable free channel. This technique is useful for providing an adaptive channel allocation scheme to systems, such as analog cellular communications systems, in which downlink interference measurements cannot be made.

    Method and apparatus for adaptive channel allocation with power control in a mobile communications system
    8.
    发明专利
    Method and apparatus for adaptive channel allocation with power control in a mobile communications system 未知

    公开(公告)号：AU702154B2

    公开(公告)日：1999-02-18

    申请号：AU5130896

    申请日：1996-03-20

    Applicant: ERICSSON TELEFON AB L M

    Inventor： WALLSTEDT KENNETH ,  ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  ANDERSSON HAKAN

    IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36

    Abstract: In a cellular communication system, a method and apparatus are provided for allocating a channel for use on a connection between a base station and a mobile station in a cell, without making measurements of downlink interference. Throughout the system, uplink and downlink power levels are regulated so that, within each cell, their sum changes by an amount whose magnitude is substantially equal to the magnitude of change in path gain between the mobile station and the base station in that cell, and which sum is opposite in sign to the amount of change in path gain. This power regulation scheme assures that there will be a strong correlation between system-wide measurements of uplink and downlink interference. Therefore, with the power regulation scheme in place, each cell determines uplink carrier to interference (C/I) ratios for the free channels available for use in the cell and selects an acceptable free channel having a C/I value that is within a predetermined acceptable range. If uplink C/I on the acceptable free channel is greater than the uplink C/I value of a channel currently assigned to a connection, then an intra-cell handover is performed so that the connection will be reassigned to the acceptable free channel. This technique is useful for providing an adaptive channel allocation scheme to systems, such as analog cellular communications systems, in which downlink interference measurements cannot be made.

    9.
    发明专利
    未知

    公开(公告)号：DE69632777T2

    公开(公告)日：2005-07-14

    申请号：DE69632777

    申请日：1996-04-03

    Applicant: ERICSSON TELEFON AB L M

    Inventor： ALMGREN MAGNUS ,  WALLSTEDT KENNETH

    IPC: H04W16/10 ,  H04Q7/36 ,  H04Q7/38

    Abstract: A cellular communication system has a plurality of cells and a plurality of channels. The plurality of channels includes a plurality of measurable channels for which interference can be measured in both uplink and downlink directions and a plurality of unmeasured channels for which interference are not made in both uplink and downlink directions. The measurable channels, designated probe channels, may be channels for use in a digital system. The unmeasured channels may be channels for use in an analog system, or broadcast channels. A method and apparatus for allocating the plurality of channels comprises initially organizing the plurality of channels into a plurality of channel groups, wherein each channel group includes at least one probe channel, and wherein at least one of the channel groups further includes at least one unmeasured channel. Then, each one of the cells performs an allocation routine comprising the steps of monitoring at least one of the channel groups by making and collecting uplink and downlink interference measurements only on the probe channel of each monitored channel group over a predetermined time period. Then, the collected uplink and downlink interference measurements are analyzed in accordance with an adaptive channel allocation strategy. Finally, a selected one of the monitored channel groups is allocated to the cell in dependence on the analyzed uplink and downlink interference measurements. In this manner, the unmeasured channels are also subjected to an adaptive channel allocation strategy.

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