公开(公告)号：CA2214389A1

公开(公告)日：1996-09-26

申请号：CA2214389

申请日：1996-03-20

Applicant: ERICSSON TELEFON AB L M

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

IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36 ,  H04B15/00

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 interferen ce. 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.

公开(公告)号：SE9501498D0

公开(公告)日：1995-04-24

申请号：SE9501498

申请日：1995-04-24

Applicant: ERICSSON TELEFON AB L M

Inventor： WALLSTEDT KENNETH ,  GHISLER WALTER

公开(公告)号：CA2214389C

公开(公告)日：2005-08-23

申请号：CA2214389

申请日：1996-03-20

Applicant: ERICSSON TELEFON AB L M

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

IPC: H04B7/005 ,  H04W16/10 ,  H04W52/34 ,  H04Q7/36 ,  H04B15/00

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 o f 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 interferen ce. 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 b e made.

公开(公告)号：DE69634120T2

公开(公告)日：2005-06-23

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.

公开(公告)号：DE69632777D1

公开(公告)日：2004-07-29

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.

公开(公告)号：AU741625B2

公开(公告)日：2001-12-06

申请号：AU7463898

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

公开(公告)号：BR9812840A

公开(公告)日：2000-08-08

申请号：BR9812840

申请日：1998-09-29

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN K MAGNUS ,  FRODIGH MAGNUS ,  MAGNUSSON SVEKER ,  VERDIER LISA DE ,  WALLSTEDT KENNETH

IPC: H04W16/18 ,  H04Q7/34

公开(公告)号：CA2293653A1

公开(公告)日：1998-12-17

申请号：CA2293653

申请日：1998-05-12

Applicant: ERICSSON TELEFON AB L M

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

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

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.