公开(公告)号：WO9619902A3

公开(公告)日：1996-08-29

申请号：PCT/SE9501508

申请日：1995-12-14

Applicant: ERICSSON TELEFON AB L M

Inventor： KALLIN HARALD ,  BODIN ROLAND

IPC: H04B7/26 ,  H04W48/12 ,  H04W56/00 ,  H04W72/12 ,  H04W74/08 ,  H04Q

CPC classification number: H04W72/1268 ,  H04W48/12 ,  H04W72/1278

Abstract: A method and system for controlling overhead information transmission in a radiocommunication system is described. By desynchronizing information transmitted in two streams on a control channel, loads on the reverse control channel are more evenly distributed to minimize overload situations. Similarly, blocked calls can be prevented by judicious transmission timing of control filler messages relative to the overhead message trains. The relative timing of various registration parameters is also described to reduce extraneous registrations.

公开(公告)号：WO9821910A3

公开(公告)日：1998-07-30

申请号：PCT/SE9701801

申请日：1997-10-28

Applicant: ERICSSON TELEFON AB L M

Inventor： NORSTEDT BENGT ,  WESTER MAGNUS ,  BODIN ROLAND

IPC: H04W76/04 ,  H04W76/06 ,  H04Q7/38 ,  H04Q7/22

CPC classification number: H04W76/045

Abstract: A disconnect time in accordance with the Global System for Mobile (GSM) Phase 1 standard is reduced within a particular base station controller (BSC) serving a particular mobile station. In response to a Layer 2 Disconnect message from a first mobile station and after the expiration of the reduced disconnect timer, the serving BTS releases the indicated logical channel from the first mobile station and enables the connected base station control (BSC) to more efficiently allocate the released logical channel (SDCCH or TCH) to a second mobile station. Thereafter, additional Layer 2 Disconnect messages transmitted by the first mobile station are ignored and no acknowledging Disconnect Mode (DM) message is transmitted over the indicated logical channel. Thus, collision over the same logical channel between the first and second mobile stations is avoided and the second mobile station is able to communicate over the allocated logical channel.

公开(公告)号：DE69433706T2

公开(公告)日：2004-07-29

申请号：DE69433706

申请日：1994-08-30

Applicant: ERICSSON TELEFON AB L M

Inventor： KALLIN HARALD ,  BODIN ROLAND ,  LINDROTH MAGNUS ,  GHISLER WALTER

IPC: H04W16/10 ,  H04W16/14 ,  H04W74/04 ,  H04W84/04 ,  H04Q7/38

公开(公告)号：DE69433706D1

公开(公告)日：2004-05-19

申请号：DE69433706

申请日：1994-08-30

Applicant: ERICSSON TELEFON AB L M

Inventor： KALLIN HARALD ,  BODIN ROLAND ,  LINDROTH MAGNUS ,  GHISLER WALTER

IPC: H04W16/10 ,  H04W16/14 ,  H04W74/04 ,  H04W84/04 ,  H04Q7/38

公开(公告)号：ES2199297T3

公开(公告)日：2004-02-16

申请号：ES96932115

申请日：1996-09-18

Applicant: ERICSSON TELEFON AB L M

Inventor： BODIN ROLAND

IPC: G09C1/00 ,  H04L9/16 ,  H04L9/18 ,  H04W12/00 ,  H04Q7/38

Abstract: The method involves modifying an encryption key (Kc) in accordance with a given algorithm and in dependence on the ordinal number of a time slot to obtain a modified encryption key. A modified pseudo-random sequence is formed from the resultant modified encryption key. The modification is carried out in accordance with the aid of an encryption algorithm. A logical operation is performed on the modified pseudo-random sequence and for each block of the non-encrypted information. Preferably the operation is performed on the information block that belongs to the time slot whose ordinal number has been used to form the modified encryption key. As an additional option, the frame number can also be modified in accordance with a given algorithm and in dependence on the ordinal number of the relevant time slot. The method provides reliable encryption in TDMA mobile radio systems in which two or more time slots are used for one and the same transmission without requiring any substantial changes to signaling protocol and/or system equipment.

公开(公告)号：RU2216126C2

公开(公告)日：2003-11-10

申请号：RU2000107796

申请日：1998-08-07

Applicant: ERICSSON TELEFON AB L M

Inventor： SERVALL ROBERT ,  BODIN ROLAND

IPC: H04W24/02 ,  H04W48/12 ,  H04W72/04 ,  H04Q7/38

公开(公告)号：DE69431237T2

公开(公告)日：2003-03-13

申请号：DE69431237

申请日：1994-10-24

Applicant: ERICSSON TELEFON AB L M

Inventor： BODIN ROLAND ,  AASTROEM ARNE

IPC: H04L29/06 ,  H04W88/18 ,  H04Q7/22

公开(公告)号：DE69623269T2

公开(公告)日：2003-02-06

申请号：DE69623269

申请日：1996-03-26

Applicant: ERICSSON TELEFON AB L M

Inventor： FORSSEN GOERAN ,  BODIN ROLAND

IPC: H01Q21/24 ,  H01Q3/26 ,  H01Q21/29 ,  H04B7/02 ,  H04B7/10 ,  H04B7/26 ,  H04W16/28 ,  H04W84/08 ,  H04B7/04 ,  H04Q7/36

Abstract: A method for broadcasting information in a cellular communication system comprising at least one base station with an antenna array and a plurality of mobile stations is disclosed. The common information is preprocessed to create orthogonal signals. The orthogonal signals are then beam formed so that the orthogonal signals are delivered to the different elements in the array antenna. The orthogonal signals are transmitted and then received at at least one mobile station. The signals are then processed at the mobile station to decipher the common information from the orthogonal signals.

公开(公告)号：DE69623269D1

公开(公告)日：2002-10-02

申请号：DE69623269

申请日：1996-03-26

Applicant: ERICSSON TELEFON AB L M

Inventor： FORSSEN GOERAN ,  BODIN ROLAND

IPC: H01Q21/24 ,  H01Q3/26 ,  H01Q21/29 ,  H04B7/02 ,  H04B7/10 ,  H04B7/26 ,  H04W16/28 ,  H04W84/08 ,  H04B7/04 ,  H04Q7/36

Abstract: A method for broadcasting information in a cellular communication system comprising at least one base station with an antenna array and a plurality of mobile stations is disclosed. The common information is preprocessed to create orthogonal signals. The orthogonal signals are then beam formed so that the orthogonal signals are delivered to the different elements in the array antenna. The orthogonal signals are transmitted and then received at at least one mobile station. The signals are then processed at the mobile station to decipher the common information from the orthogonal signals.

公开(公告)号：NZ331135A

公开(公告)日：2000-01-28

申请号：NZ33113595

申请日：1995-12-14

Applicant: ERICSSON TELEFON AB L M

Inventor： KALLIN HARALD ,  BODIN ROLAND

IPC: H04B7/26 ,  H04W48/12 ,  H04W56/00 ,  H04W72/12 ,  H04W74/08 ,  H04Q7/20 ,  H04Q7/38

Abstract: stream of the supervisory messages are transmitted on the control channel of a radio communications system in portions which each have a certain transmission time and the same information which includes system parameters and/or instruction. Within a predetermined time period prior to transmission of each of the supervisory messages a control filler is transmitted on the control channel. The predetermined time period is set to maximize a number of the supervisory messages which are transmitted before a time out period of a mobile receiving the control channel expires. Thus, because the control filler message is sent at a predetermined time before the Overhead Message Train (OMT), a mobile station which requires network access and which needs to receive both a control filler and an OMT prior to attempting access is provided with an optimized opportunity to receive both messages prior to timing out.