公开(公告)号：DE69431648T2

公开(公告)日：2003-08-14

申请号：DE69431648

申请日：1994-05-10

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  ANDERSSON HAKAN ,  GRIMLUND OLLE

IPC: H04B7/005 ,  H04B7/26

Abstract: A method of and apparatus for stable regulation of transmission power level in a radio system use the carrier-to-interference (C/I) ratio of the communication channel. A C/I target that is a monotonically decreasing function of the interference on the channel is used for regulating the transmission power level. Thus, as the interference increases the transmission power increases to compensate, but to a level yielding a lower C/I level. The path loss or gain of the channel may also be determined and used in the regulation.

公开(公告)号：AU7567200A

公开(公告)日：2001-04-17

申请号：AU7567200

申请日：2000-09-15

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  OLOFSSON HAKAN ,  SVANBRO KRISTER

IPC: H04B7/005 ,  H04W52/22 ,  H04W52/36 ,  H04Q7/32

Abstract: The present invention relates to methods of controlling transmitting power in a cellular radio communication system comprising one or several base stations each communicating with mobile terminals located within its respective area of coverage in which method the desired power change is calculated by means of an adaptive algorithm. Power drift between the desired output power and actually used output power is reduced by making the algorithm reduce the influence of the previously used output power by multiplying it with a "forgetting function" lambda with values between 0 and 1. At the receiving end is a decision made whether the received power order commands are reliable or not by checking the soft value of the power order commands. This proposed power control algorithm provides a delta-modulated fast power control method which is robust to errors in the signalling channel and at the same time reacts quickly to fast fading variations.

公开(公告)号：SE0002285D0

公开(公告)日：2000-06-19

申请号：SE0002285

申请日：2000-06-19

Applicant: ERICSSON TELEFON AB L M

Inventor： SKILLERMARK PER ,  KARLSSON MAGNUS ,  ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  GUIDOTTI PAOLO

IPC: H04L12/56 ,  H04W16/06 ,  H04W16/14 ,  H04W72/04 ,  H04W84/04 ,  H04B

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.

公开(公告)号：BR9811198B1

公开(公告)日：2015-02-03

申请号：BR9811198

申请日：1998-06-26

Applicant: ERICSSON TELEFON AB L M

Inventor： FRODIGH MAGNUS ,  ALMGREN MAGNUS ,  OLOFSSON HAAKAN

IPC: H04W36/30 ,  H04B7/26

Abstract: The invention relates to a method of performing handover in a mobile radio system. The mobile radio system performs quality measurements on signals transmitted (300) between a mobile terminal and predetermined radio base stations. Handover is performed (301, 302, 303) when some of the measured signal strengths exceeds the signal strength for the radio base station to which the mobile terminal for the moment is set up, added to a handover value. The handover value is dependent on measured signal strengths and neighboring cell relation values. The neighboring cell relation values depend on a probability for handover to be performed from one radio base station to another radio base station in the mobile radio system.

公开(公告)号：AT545220T

公开(公告)日：2012-02-15

申请号：AT08775001

申请日：2008-07-10

Applicant: ERICSSON TELEFON AB L M

Inventor： HOYMANN CHRISTIAN ,  ALMGREN MAGNUS ,  SKILLERMARK PER ,  SIMONSSON ARNE

IPC: H04B7/26 ,  H04B7/155

公开(公告)号：DE69841958D1

公开(公告)日：2010-12-02

申请号：DE69841958

申请日：1998-06-16

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  FRODIGH MAGNUS ,  GUDMUNDSON MIKAEL ,  KRONESTEDT FREDRIC

IPC: H04B1/04 ,  H04B7/005 ,  H04B7/26 ,  H04W4/00

公开(公告)号：AT445304T

公开(公告)日：2009-10-15

申请号：AT02804372

申请日：2002-12-05

Applicant: ERICSSON TELEFON AB L M

Inventor： SIMONSSON ARNE ,  ALMGREN MAGNUS

IPC: H04W72/08 ,  H04L1/00

Abstract: The present invention relates to a method in a wireless communication system and in particular better usage of available radio resources in such systems by controlling the party effects using user based scheduling back-off. The scheduling back-off according to the invention is based on providing and controlling the number of channels/frequencies/codes/timeslots or fractions of channel use to a terminal depending on information regarding radio channel quality obtained from the system.

公开(公告)号：DE69839675D1

公开(公告)日：2008-08-14

申请号：DE69839675

申请日：1998-06-12

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  LARSSON PER

IPC: H04L12/413 ,  H04L12/801 ,  H04W28/10 ,  H04W28/26

Abstract: The present invention relates to a device and a method for packet switching in a cellular radio communication system. Radio stations that have packets to transmit, transmit packets with a particular transmission probability (Si,n). The fraction of the transmitted packets that are received correctly by the receiving radio station, the so-called throughput fraction (ti,n), can be calculated. The transmission probability (Si,n) for a transmitting radio station is continuously updated according to a mapping function (f(a)) that depends on the value of the throughput fraction (ti,n). According to the invention a mapping function (f(a)), with a derivative with an absolute value less than one, is chosen (201). Starting values of the throughput fraction (ti,n) are generated (203) and these values are input to the mapping function. Updated values of the transmission probability (Si,n) are generated (204) by mapping function. The transmitting radio station transmits (205) packets according to the updated transmission probability, whereby a new value of the throughput fraction is generated (206). The method is repeated until the values of the throughput fraction are stable.

公开(公告)号：DE69734870D1

公开(公告)日：2006-01-19

申请号：DE69734870

申请日：1997-01-28

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  BEMING JOHAN ,  FRODIGH MAGNUS

IPC: H04W16/02 ,  H04W16/12 ,  H04W48/06

Abstract: Circuitry, and an associated method for a multi-user communication system, such as a cellular communication system. Additional communication is selectively permitted in the communication system through operation of the circuitry. Levels of communication quality of ongoing communication in the communication system are determined. When a request is made to admit additional communication, the additional communication is admitted only when the level of communication quality is better than a selected threshold.