IT1269794B - PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT - Google Patents

PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT

Info

Publication number
IT1269794B
IT1269794B ITMI941009A ITMI941009A IT1269794B IT 1269794 B IT1269794 B IT 1269794B IT MI941009 A ITMI941009 A IT MI941009A IT MI941009 A ITMI941009 A IT MI941009A IT 1269794 B IT1269794 B IT 1269794B
Authority
IT
Italy
Prior art keywords
handover
radio
advance
procedure
radio signals
Prior art date
Application number
ITMI941009A
Other languages
Italian (it)
Inventor
Valentina Fidanza
Giacomo Premoli
Original Assignee
Sits Soc It Telecom Siemens
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sits Soc It Telecom Siemens filed Critical Sits Soc It Telecom Siemens
Priority to ITMI941009A priority Critical patent/IT1269794B/en
Publication of ITMI941009A0 publication Critical patent/ITMI941009A0/en
Priority to PCT/EP1995/001841 priority patent/WO1995032593A1/en
Priority to CN95194168A priority patent/CN1152991A/en
Priority to EP95920043A priority patent/EP0760193A1/en
Priority to AU25645/95A priority patent/AU2564595A/en
Priority to ZA954052A priority patent/ZA954052B/en
Publication of ITMI941009A1 publication Critical patent/ITMI941009A1/en
Application granted granted Critical
Publication of IT1269794B publication Critical patent/IT1269794B/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/30—Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302—Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • H04B1/1027—Means associated with receiver for limiting or suppressing noise or interference assessing signal quality or detecting noise/interference for the received signal

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Viene descritto un procedimento, ed un circuito, per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio, particolarmente utili in ambienti microcellulari urbani. Il procedimento consiste in un opportuno filtraggio numerico dei valori medi a breve termine (circa 0,5 secondi) di campioni di livello sia misurati (downlink) da un apparato mobile, che inviati (uplink) alla stazione servente. Il suddetto filtraggio viene attuato applicando una metodologia FIR ai valori medi d'ingresso espressi in dBm. I valori filtrati vengono confrontati con una soglia prestabilita, il cui superamento comporta l'emissione anticipata di una richiesta di handover per causa livello tra il mobile e una cella adiacente (target) preferita. Quando la soglia non viene superata continuano a valere i criteri normalmente previsti per l'esecuzione degli handover (fig. 1).A method and a circuit are described for the advance of handover in mobile radio systems in the presence of sharp attenuation of the radio signals, particularly useful in urban microcellular environments. The procedure consists of a suitable numerical filtering of the short-term average values (about 0.5 seconds) of level samples both measured (downlink) from a mobile device and sent (uplink) to the serving station. The aforementioned filtering is carried out by applying a FIR method to the average input values expressed in dBm. The filtered values are compared with a predetermined threshold, the exceeding of which leads to the early release of a handover request due to the level between the cabinet and a preferred adjacent target cell. When the threshold is not exceeded, the criteria normally envisaged for handover execution continue to apply (fig. 1).

ITMI941009A 1994-05-19 1994-05-19 PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT IT1269794B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
ITMI941009A IT1269794B (en) 1994-05-19 1994-05-19 PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT
PCT/EP1995/001841 WO1995032593A1 (en) 1994-05-19 1995-05-16 Method and apparatus for rapid handover in a mobile radio system in the presence of abrupt radio signal attenuation
CN95194168A CN1152991A (en) 1994-05-19 1995-05-16 Method and device for fast switching in wireless mobile communication system under sudden attenuation of wireless signal
EP95920043A EP0760193A1 (en) 1994-05-19 1995-05-16 Method and apparatus for rapid handover in a mobile radio system in the presence of abrupt radio signal attenuation
AU25645/95A AU2564595A (en) 1994-05-19 1995-05-16 Method and apparatus for rapid handover in a mobile radio system in the presence of abrupt radio signal attenuation
ZA954052A ZA954052B (en) 1994-05-19 1995-05-18 Procedure for advance handover in mobile radio systems in the presence of abrupt radio signal attenuation and associated circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI941009A IT1269794B (en) 1994-05-19 1994-05-19 PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT

Publications (3)

Publication Number Publication Date
ITMI941009A0 ITMI941009A0 (en) 1994-05-19
ITMI941009A1 ITMI941009A1 (en) 1995-11-19
IT1269794B true IT1269794B (en) 1997-04-15

Family

ID=11368934

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI941009A IT1269794B (en) 1994-05-19 1994-05-19 PROCEDURE FOR THE ADVANCE OF HANDOVER IN RADIO-MOBILE SYSTEMS IN THE PRESENCE OF BRUSH ATTENUATIONS OF THE RADIO SIGNALS AND RELATED CIRCUIT

Country Status (6)

Country Link
EP (1) EP0760193A1 (en)
CN (1) CN1152991A (en)
AU (1) AU2564595A (en)
IT (1) IT1269794B (en)
WO (1) WO1995032593A1 (en)
ZA (1) ZA954052B (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2338624A (en) * 1998-06-17 1999-12-22 Motorola Inc Handover determination in a mobile communications system
KR100854138B1 (en) * 2000-11-13 2008-08-26 파처 아게 Rockfall prevention net for rockfall prevention system
US6615044B2 (en) * 2001-06-06 2003-09-02 Nokia Mobile Phones, Ltd. Method of WCDMA coverage based handover triggering
US8463198B2 (en) * 2009-07-15 2013-06-11 Mediatek Inc. Signal processing method and communication apparatus utilizing the same
CN103379572B (en) * 2012-04-16 2018-02-09 马维尔国际有限公司 The method and apparatus for fleeing from current service cell

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4556760A (en) * 1984-06-11 1985-12-03 Itt Corporation Hand-off filter for cellular mobile radio
GB9012044D0 (en) * 1990-05-30 1990-07-18 British Telecomm Cellular radio

Also Published As

Publication number Publication date
CN1152991A (en) 1997-06-25
AU2564595A (en) 1995-12-18
EP0760193A1 (en) 1997-03-05
ZA954052B (en) 1996-01-19
ITMI941009A0 (en) 1994-05-19
ITMI941009A1 (en) 1995-11-19
WO1995032593A1 (en) 1995-11-30

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19970522