公开(公告)号：DE60232022D1

公开(公告)日：2009-05-28

申请号：DE60232022

申请日：2002-01-25

Applicant: ERICSSON TELEFON AB L M

Inventor： LARSSON KJELL ,  SVENSSON BJOERN ,  GUSTAFSSON JOERGEN

IPC: H04W24/00

Abstract: The present invention relates to a method to identify one or more interference sources in a mobile radio system, preferably in a GSM radio network for mobile telephones. A received signal (r) consists of a wanted signal and a number of interference signals of which one is a dominating interference signal and where all signals includes a known training sequence (TK 1 ,TK 2 , . . . ). The carrier is estimated and subtracted from the received signal (r) giving a remaining interference signal (s).This signal is correlated against known training sequences (TKj, j=0,1,2, . . . ,7) resulting in a training sequence associated with the interfering signal. According to the invention, the identification code (BCC) of a possible interference source (BS1) from said training sequence is determined. After that, a number of candidates (CA 1 ,CA 2 , ), each corresponding with a certain cell from the identification code (BCC) are determined and also the frequency which is disturbed and the timing offset (t 1 ,t 2 , . . . FIG. 7 ) for the frequencies used by said candidates. Finally it is investigated if one or more (fa,fb) of these have the same time offset as the interference signal (t 0 ) resulting in that at least one candidate (CA 3 ) with the best matching offsets on its frequencies is identified as the interference source.

公开(公告)号：AT429137T

公开(公告)日：2009-05-15

申请号：AT02710597

申请日：2002-01-25

Applicant: ERICSSON TELEFON AB L M

Inventor： LARSSON KJELL ,  SVENSSON BJOERN ,  GUSTAFSSON JOERGEN

IPC: H04W24/00

Abstract: The present invention relates to a method to identify one or more interference sources in a mobile radio system, preferably in a GSM radio network for mobile telephones. A received signal (r) consists of a wanted signal and a number of interference signals of which one is a dominating interference signal and where all signals includes a known training sequence (TK 1 ,TK 2 , . . . ). The carrier is estimated and subtracted from the received signal (r) giving a remaining interference signal (s).This signal is correlated against known training sequences (TKj, j=0,1,2, . . . ,7) resulting in a training sequence associated with the interfering signal. According to the invention, the identification code (BCC) of a possible interference source (BS1) from said training sequence is determined. After that, a number of candidates (CA 1 ,CA 2 , ), each corresponding with a certain cell from the identification code (BCC) are determined and also the frequency which is disturbed and the timing offset (t 1 ,t 2 , . . . FIG. 7 ) for the frequencies used by said candidates. Finally it is investigated if one or more (fa,fb) of these have the same time offset as the interference signal (t 0 ) resulting in that at least one candidate (CA 3 ) with the best matching offsets on its frequencies is identified as the interference source.

公开(公告)号：IN620DEN2012A

公开(公告)日：2015-06-12

申请号：IN620DEN2012

申请日：2012-01-20

Applicant: ERICSSON TELEFON AB L M

Inventor： BRANNSTROM NILS ,  CRAIG STEPHEN ,  JONSSON ANDERS ,  LARSSON KJELL ,  OKVIST PETER

IPC: H04L1/20

Abstract: The present invention relates to a method and an arrangement in a first communication node (115) for adjusting a channel quality report transmitted between the first communication node (1 15) and a second communication node (105). The first communication node (115) and the second communication node (105) are comprised in a wireless communication network (100), and are adapted to communicate with each other via a radio link (1 10). In a first step, a channel quality report is received (600) from the second communication node (105). The channel quality report is established by the second communication node (105). Then at least one channel characteristic parameter is obtained (601 ). The next step is to determine a channel quality offset based on the obtained channel characteristic parameter. Based on the channel quality offset, the channel quality report is adjusted (605).