IT1269794B - Procedimento per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio e relativo circuito - Google Patents
Procedimento per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio e relativo circuitoInfo
- 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
Links
- 238000000034 method Methods 0.000 title abstract 4
- 238000001914 filtration Methods 0.000 abstract 2
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).
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI941009A IT1269794B (it) | 1994-05-19 | 1994-05-19 | Procedimento per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio e relativo circuito |
CN95194168A CN1152991A (zh) | 1994-05-19 | 1995-05-16 | 无线信号突然衰减情况下无线移动通信***中快速切换的方法和装置 |
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 |
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 |
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 |
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 (it) | 1994-05-19 | 1994-05-19 | Procedimento per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio e relativo circuito |
Publications (3)
Publication Number | Publication Date |
---|---|
ITMI941009A0 ITMI941009A0 (it) | 1994-05-19 |
ITMI941009A1 ITMI941009A1 (it) | 1995-11-19 |
IT1269794B true IT1269794B (it) | 1997-04-15 |
Family
ID=11368934
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ITMI941009A IT1269794B (it) | 1994-05-19 | 1994-05-19 | Procedimento per l'anticipo di handover in sistemi radiomobili in presenza di brusche attenuazioni dei segnali radio e relativo circuito |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0760193A1 (it) |
CN (1) | CN1152991A (it) |
AU (1) | AU2564595A (it) |
IT (1) | IT1269794B (it) |
WO (1) | WO1995032593A1 (it) |
ZA (1) | ZA954052B (it) |
Families Citing this family (5)
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 (ko) * | 2000-11-13 | 2008-08-26 | 파처 아게 | 낙석방지시스템을 위한 낙석방지네트 |
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 (zh) * | 2012-04-16 | 2018-02-09 | 马维尔国际有限公司 | 逃离当前服务小区的方法和装置 |
Family Cites Families (2)
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 |
-
1994
- 1994-05-19 IT ITMI941009A patent/IT1269794B/it active IP Right Grant
-
1995
- 1995-05-16 EP EP95920043A patent/EP0760193A1/en not_active Withdrawn
- 1995-05-16 WO PCT/EP1995/001841 patent/WO1995032593A1/en not_active Application Discontinuation
- 1995-05-16 AU AU25645/95A patent/AU2564595A/en not_active Abandoned
- 1995-05-16 CN CN95194168A patent/CN1152991A/zh active Pending
- 1995-05-18 ZA ZA954052A patent/ZA954052B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
ITMI941009A1 (it) | 1995-11-19 |
ITMI941009A0 (it) | 1994-05-19 |
ZA954052B (en) | 1996-01-19 |
CN1152991A (zh) | 1997-06-25 |
EP0760193A1 (en) | 1997-03-05 |
AU2564595A (en) | 1995-12-18 |
WO1995032593A1 (en) | 1995-11-30 |
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Legal Events
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0001 | Granted | ||
TA | Fee payment date (situation as of event date), data collected since 19931001 |
Effective date: 19970522 |