公开(公告)号：CA2300073A1

公开(公告)日：1999-02-25

申请号：CA2300073

申请日：1998-06-26

Applicant: ERICSSON TELEFON AB L M

Inventor： FRODIGH MAGNUS ,  ALMGREN MAGNUS ,  OLOFSSON HAKAN

IPC: H04B7/26 ,  H04W36/30 ,  H04Q7/38

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 neighbouring cell relation values. The neighbouring 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：AU8135498A

公开(公告)日：1999-01-19

申请号：AU8135498

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 ,  H04L12/56

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：AU1680197A

公开(公告)日：1997-08-22

申请号：AU1680197

申请日：1997-01-30

Applicant: ERICSSON TELEFON AB L M

Inventor： BERG JAN-ERIK ,  ALMGREN MAGNUS

IPC: H01Q9/30 ,  H01Q3/44

Abstract: A radio communications unit that has a casing includes an antenna that is connected to a signal processing unit. A metal object is placed in the casing and connected to an impedance. The antenna receives a radio signal which has repeating fading moments where the signal strength C is exceedingly low. The signal processing unit includes a unit for controlling a switch and impedance unit. In their simplest form, these control devices are manual, although they may alternatively comprise devices that are integrated in the signal processing unit which controls the activation of the metal object and the impedance with control signals. When the antenna is situated in a fading minimum, the metal object is either connected to or disconnected from the impedance unit, resulting in new signal reflections that cause the fading minimum to be moved away from the antenna.

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：NZ591545A

公开(公告)日：2013-11-29

申请号：NZ59154508

申请日：2008-09-24

Applicant: ERICSSON TELEFON AB L M

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

IPC: H04W16/26 ,  H04B7/155 ,  H04B7/26 ,  H04L12/24

Abstract: 591545 Disclosed is a method in a control unit (150) for controlling a repeater (100) or a relay of a radio access network (110). The method is performed by sending, to the repeater (100) or the relay, a repeater control message through a tunnel (160) as ordinary data communication. The tunnel (160) is created by a setting up an available radio communication channel from the control unit (150) to the repeater (100) or relay within the radio access network (110) by addressing a SIM card, a mobile phone number, or an Internet protocol "IP" address of the repeater (100) or the relay. The communication channel is set up such that the radio network (110) believes that the repeater control message is an ordinary data communication and is unaware that it is a control message that is sent. The repeater control message is configured to control the repeater (100) or the relay.

公开(公告)号：BRPI0619226A2

公开(公告)日：2013-01-08

申请号：BRPI0619226

申请日：2006-10-24

Applicant: ERICSSON TELEFON AB L M

Inventor： LINDOFF BENGT ,  ALMGREN MAGNUS ,  ASPLUND HENRIK ,  FURUSKAER ANDERS ,  WIBERG NICLAS

IPC: H04W48/20

Abstract: Systems and methods of cell selection are based on measures of frequency selectivity, time selectivity, and/or antenna selectivity. For example, the delay spread and coherence bandwidth of a channel are two measures of frequency selectivity that can be taken into account in the cell selection process. In addition to or instead of either delay spread or coherence bandwidth, Doppler frequency shift or coherence time (which are two measures of time selectivity) and/or antenna correlation or mean signal strength per antenna (which are two measures of antenna selectivity), among other parameters, can be determined and taken into account.

公开(公告)号：AT549892T

公开(公告)日：2012-03-15

申请号：AT04793874

申请日：2004-10-29

Applicant: ERICSSON TELEFON AB L M

Inventor： WAN LEI ,  ALMGREN MAGNUS ,  TIDESTAV CLAES

IPC: H04W52/12 ,  H04W52/26

Abstract: In a method for power control in a telecommunication system, the transmit power is adjusted based on at least the mutual information expression or a representation thereof. According to one aspect the transmit power for a coming slot is controlled based on the previously received slots, wherein an estimated quality is compared to a determined quality target based on the mutual information expression.

公开(公告)号：MX2011002391A

公开(公告)日：2011-04-07

申请号：MX2011002391

申请日：2008-09-24

Applicant: ERICSSON TELEFON AB L M

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

IPC: H04W16/26

Abstract: Un objeto de la presente invención es proporcionar un mecanismo para controlar una repetidora que es menos costosa y más flexible. El objetivo se logra mediante un método en una unidad de control (150) para controlar una repetidora (100) que está comprendida en una red (110) de acceso de radio. La unidad de control envía un mensaje de control de repetidora a la repetidora (100). El mensaje de control de repetidora se canaliza como comunicación de dato ordinaria a través de un canal (160) de comunicación de radio disponible, dentro de la red (110) de acceso de radio. El mensaje de control de repetidora está configurado para controlar la repetidora (100).

公开(公告)号：AT441982T

公开(公告)日：2009-09-15

申请号：AT04809182

申请日：2004-12-22

Applicant: ERICSSON TELEFON AB L M

Inventor： ALMGREN MAGNUS ,  SKILLERMARK PER

IPC: H04B7/005

Abstract: A method for allocating power and channels to connections in a multi-channel access based wireless communication system in which each connection is acting independently of the other. The quality of each channel of a connection is measured at successive time steps (n, n+1). The measurements from a previous time step (n) are used to allocate, in the following time step (n+1), an average power of all channels the connection uses as well as individual power settings in-between said channels. The average power is controlled using an outer fairness loop balancing the average channel power against average bit rate per channel. The individual power settings is controlled using an inner capacity loop allocating much power to good channels and restricted power to poor channels. Each loop has a respective target relation and the results of the loops are combined in order to determine transmission power in the next time step. The method is of distributed character and may execute on individual receiving nodes. Further, it may be applied in the up link or in the down link.

公开(公告)号：AT408311T

公开(公告)日：2008-09-15

申请号：AT03721206

申请日：2003-04-15

Applicant: ERICSSON TELEFON AB L M

Inventor： FURUSKAER ANDERS ,  ALMGREN MAGNUS ,  MAGNUSSON SVERKER ,  SIMONSSON ARNE ,  MAGNUSSON PER

IPC: H04L12/56 ,  H04W88/06 ,  H04W99/00

Abstract: Users of a given service in a wireless communication system that includes a plurality of multi-service subsystems are allocated to one of the subsystems in accordance with a combined capacity region of the wireless communication system. The combined capacity region is determined based upon capacity regions of each of the plurality of multi-service subsystems. The capacity regions of the plurality of multi-service subsystems are determined using a relative decrease in users of a first service as a function of an increase in users of a second service.