WO1994029972A1 - Process for improving frequency allocation in a cellular mobile radio system with multiple power supply - Google Patents

Process for improving frequency allocation in a cellular mobile radio system with multiple power supply Download PDF

Info

Publication number
WO1994029972A1
WO1994029972A1 PCT/EP1994/001537 EP9401537W WO9429972A1 WO 1994029972 A1 WO1994029972 A1 WO 1994029972A1 EP 9401537 W EP9401537 W EP 9401537W WO 9429972 A1 WO9429972 A1 WO 9429972A1
Authority
WO
WIPO (PCT)
Prior art keywords
frequency allocation
radio system
mobile radio
cellular mobile
power supply
Prior art date
Application number
PCT/EP1994/001537
Other languages
German (de)
French (fr)
Inventor
Wolfgang Papen
Stefan ZÜRBES
Original Assignee
Detecon Deutsche Telepost Consulting Gmbh
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 Detecon Deutsche Telepost Consulting Gmbh filed Critical Detecon Deutsche Telepost Consulting Gmbh
Priority to AU69276/94A priority Critical patent/AU6927694A/en
Publication of WO1994029972A1 publication Critical patent/WO1994029972A1/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/12—Fixed resource partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02—Resource partitioning among network components, e.g. reuse partitioning
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]

Definitions

  • the invention relates to a method for improved frequency allocation with minimized adjacent channel interferences in a cellular mobile radio system with multiple coverage.
  • the available frequency or channel groups should be able to be reused as often as possible in the area for different connections Channel repetition).
  • it must be ensured that both co-channel and adjacent-channel interference, which can cause interference in connections, remain as low as possible.
  • An arrangement of cells that contains all occurring channel groups and that can be repeated periodically in the area is called a cluster.
  • DE-P 41 41 398.9 proposes to improve the coverage of the individual cells by illuminating a cell from three different fixed stations with sector antennas. These three base stations each use the same channel group. This results in a more even illumination of the cell. Furthermore, using overlapping sector antennas at a base station creates a cluster with overlapping cells.
  • Soft handover This results from the fact that the mobile station moves within a cell from one fixed station to another. The mobile station is essentially supplied by the strongest base station. The mobile station does not notice anything of this soft handover, since all three base stations use the same channel group.
  • the radio network architecture with overlapping sectors considered here provision is therefore made for adjacent, overlapping sectors to be occupied with non-adjacent frequencies. This keeps the adjacent channel interference as low as possible.
  • the method accordingly contains an optimized frequency allocation for the above-described basic radio network architecture with hexagonal cells.
  • the base station uses all available frequency groups, there are no overlaps of cells with adjacent frequency groups in different radio network architectures of the type described. While a cluster in the original definition was determined by the fact that each frequency group was represented only once, each frequency group is now used several times within a cluster.
  • the frequency allocation for the individual overlapping sectors can be obtained by a special optimization of the frequency allocation, which ensures that the frequencies are as far apart as possible in the overlaps.
  • the selection of the frequencies can be derived by cyclically interchanging the frequency groups and by rotating and mirroring the arrangement.
  • Figure 1 a 3-cell cluster with non-optimized
  • FIG. 2 a 3-cell cluster according to FIG. 1 without showing the overlaps
  • FIG. 3 a 3-cell cluster with optimized frequency allocation according to the invention
  • FIG. 4 a 3-cell cluster according to Figure 3 without showing the overlaps
  • FIG. 5 a 4-cell cluster with optimized frequency allocation according to the invention
  • FIG. 6 a 4-cell cluster according to FIG. 5 without showing the overlaps
  • Adjacent numbers mean adjacent frequency groups in all drawings. The greater the difference between the numbers, the greater the distance between the frequencies.

Abstract

The description relates to a process for improving frequency allocation in a cellular mobile radio system with multiple coverage for a radio system architecture of a multiple cell cluster with mutually overlapping hexagonal cells, in which each hexagonal cell is covered simulteanously from three of its corners by fixed stations with the same frequency group, whereby overlapping sectors are covered by non-adjacent frequencies.

Description

Verfahren zur verbesserten FrequenzZuweisung bei einem zellularen Mobilfunksystem mit MehrfachversorgungMethod for improved frequency allocation in a cellular mobile radio system with multiple coverage
l. Die Erfindung betrifft ein Verfahren zur verbesserten FrequenzZuweisung mit minimierten Nachbarkanal-Inter¬ ferenzen bei einem zellularen Mobilfunksystem mit Mehr¬ fachversorgung.l. The invention relates to a method for improved frequency allocation with minimized adjacent channel interferences in a cellular mobile radio system with multiple coverage.
Um in einem Mobilfunknetz eine möglichst hohe Teilnehmer¬ kapazität zu erzielen, sollen die zur Verfügung stehenden Frequenz- bzw. Kanalgruppen möglichst häufig in der Fläche für unterschiedliche Verbindungen wiederbenutzt werden können, also in räumlich möglichst dicht benach- barten Zellen wiederholt werden (Frequenz- bzw. Kanalwie¬ derholung, engl. Channel reuse) . Dabei muß andererseits sichergestellt werden, da/3 sowohl Gleichkanal- als auch Nachbarkanalstörungen, welche Störungen von Ver¬ bindungen hervorrufen können, möglichst gering bleiben. Eine Anordnung von Zellen, welche sämtliche vorkommenden Kanalgruppen beinhaltet und die sich lückenlos periodisch in der Fläche wiederholen lässt, wird Cluster genannt.In order to achieve the highest possible subscriber capacity in a mobile radio network, the available frequency or channel groups should be able to be reused as often as possible in the area for different connections Channel repetition). On the other hand, it must be ensured that both co-channel and adjacent-channel interference, which can cause interference in connections, remain as low as possible. An arrangement of cells that contains all occurring channel groups and that can be repeated periodically in the area is called a cluster.
2. In der DE-P 41 41 398.9 wird vorgeschlagen, die Ver- sorgung der einzelnen Zellen dadurch zu verbessern, da/3 eine Zelle von drei verschiedenen Feststationen mit Sektorantennen ausgeleuchtet wird. Diese drei Fest¬ stationen verwenden jeweils die gleiche Kanalgruppe. Damit wird eine gleichmässigere Ausleuchtung der Zelle erreicht. Desweiteren entsteht durch Verwendung von sich überlappenden Sektorantennen an einer Feststation ein Cluster mit sich überlappenden Zellen.2. DE-P 41 41 398.9 proposes to improve the coverage of the individual cells by illuminating a cell from three different fixed stations with sector antennas. These three base stations each use the same channel group. This results in a more even illumination of the cell. Furthermore, using overlapping sector antennas at a base station creates a cluster with overlapping cells.
Innerhalb einer solchen Konfiguration gibt es zwei Formen des Handover. Erstens einen impliziten oder "weichen" Handover, der dadurch entsteht, da/3 sich die Mobilstation innerhalb einer Zelle von einer Fest¬ station zu einer anderen bewegt. Die Versorgung der Mobilstation wird dabei im wesentlichen von der stärksten Feststation übernommen. Von diesem weichen Handover merkt die Mobilstation nichts, da alle drei Fest¬ stationen die gleiche Kanalgruppe verwenden.There are two types of handover within such a configuration. First, an implicit or "Soft" handover, which results from the fact that the mobile station moves within a cell from one fixed station to another. The mobile station is essentially supplied by the strongest base station. The mobile station does not notice anything of this soft handover, since all three base stations use the same channel group.
Zweitens gibt es einen konventionellen Handover mit Kanalwechsel im Uberlappungsbereich von benachbarten Zellen. Da diese Überlappungsbereiche nicht mit den Sektorgrenzen oder herkömmlichen Funkzonengrenzen zusammenfallen, ist dieser Handover weder unsicher noch zeitkritisch.Second, there is a conventional handover with a channel change in the overlap area of neighboring cells. Since these overlap areas do not coincide with the sector boundaries or conventional radio zone boundaries, this handover is neither uncertain nor time-critical.
3. Es ist die Aufgabe der vorliegenden Erfindung, ein Verfahren bereitzustellen, in dem die Nachbarkanal- Interferenzen auf ein Minimum herabgesetzt werden.3. It is the object of the present invention to provide a method in which the adjacent channel interference is reduced to a minimum.
Diese Aufgabe wird durch die technische Lehre des Anspruchs 1 gelöst, in dem ein neuartiges Verfahren zur FrequenzZuteilung für eine Funknetzarchitektur bean¬ sprucht wird.This object is achieved by the technical teaching of claim 1, in which a novel method for frequency allocation for a radio network architecture is claimed.
Es ist somit im Fall der hier betrachteten Funknetz¬ architektur mit sich überlappenden Sektoren vorgesehen, benachbarte, sich überlappende Sektoren mit nicht¬ benachbarten Frequenzen zu belegen. Dadurch werden die auftretenden Nachbarkanal-Interferenzen so gering wie möglich gehalten. Das Verfahren beinhaltet demnach eine optimierte FrequenzZuweisung für die oben be¬ schriebene grundsätzliche Funknetzarchitektur mit hexa¬ gonalen Zellen. Obwohl die Basisstation alle vorhandenen Frequenz¬ gruppen verwendet, treten in unterschiedlichen Funk¬ netz-Architekturen des beschriebenen Typs keine Über¬ lappungen von Zellen mit benachbarten Frequenzgruppen auf. Während ein Cluster in der ursprünglichen Definition dadurch bestimmt war, daß jede Frequenzgruppe nur einmal vertreten war, wird jetzt innerhalb eines Clusters jede Frequenzgruppe mehrfach verwendet.In the case of the radio network architecture with overlapping sectors considered here, provision is therefore made for adjacent, overlapping sectors to be occupied with non-adjacent frequencies. This keeps the adjacent channel interference as low as possible. The method accordingly contains an optimized frequency allocation for the above-described basic radio network architecture with hexagonal cells. Although the base station uses all available frequency groups, there are no overlaps of cells with adjacent frequency groups in different radio network architectures of the type described. While a cluster in the original definition was determined by the fact that each frequency group was represented only once, each frequency group is now used several times within a cluster.
Die FrequenzZuweisung für die einzelnen sich über¬ lappenden Sektoren kann durch eine spezielle Optimierung der FrequenzZuweisung gewonnen werden, die sicherstellt, daß in den Überlappungen die Frequenzen möglichst weit auseinanderliegen. Die Auswahl der Frequenzen kann durch zyklische Vertauschung der Frequenzgruppen sowie durch Rotation und Spiegelungen der Anordnung abgeleitet werden.The frequency allocation for the individual overlapping sectors can be obtained by a special optimization of the frequency allocation, which ensures that the frequencies are as far apart as possible in the overlaps. The selection of the frequencies can be derived by cyclically interchanging the frequency groups and by rotating and mirroring the arrangement.
Die Erfindung soll anhand von Ausführungsbeispielen mit Hinweis auf die beiliegenden Zeichnungen erläutert werden.The invention will be explained using exemplary embodiments with reference to the accompanying drawings.
Es bedeuten:It means:
Figur 1: ein 3-Zell-Cluster mit nichtoptimierterFigure 1: a 3-cell cluster with non-optimized
Frequenzzuteilung nach dem Stand der Technik;Frequency allocation according to the prior art;
Figur 2: ein 3-Zell-Cluster gemäss Figur 1 ohne Dar¬ stellung der Überlappungen;FIG. 2: a 3-cell cluster according to FIG. 1 without showing the overlaps;
Figur 3: ein 3-Zell-Cluster mit optimierter Frequenz¬ zuteilung gemäss der Erfindung;FIG. 3: a 3-cell cluster with optimized frequency allocation according to the invention;
Figur 4: ein 3-Zell-Cluster gemäss Figur 3 ohne Dar- Stellung der Überlappungen; Figur 5: ein 4-Zell-Cluster mit optimierter Frequenz¬ zuteilung gemäss der Erfindung;Figure 4: a 3-cell cluster according to Figure 3 without showing the overlaps; FIG. 5: a 4-cell cluster with optimized frequency allocation according to the invention;
Figur 6: ein 4-Zell-Cluster gemäss Figur 5 ohne Dar¬ stellung der Überlappungen;FIG. 6: a 4-cell cluster according to FIG. 5 without showing the overlaps;
Figur 7: eine alternative FrequenzZuteilung für dasFigure 7: an alternative frequency allocation for the
4-Zell-Cluster gemäss Figur 5 ohne Darstellung der Überlappungen;4-cell cluster according to FIG. 5 without illustration of the overlaps;
Figur 8: eine andere FrequenzZuteilung für dasFigure 8: another frequency allocation for that
4-Zell-Cluster gemäss Figur 5 ohne Darstellung der Überlappungen.4-cell cluster according to FIG. 5 without illustration of the overlaps.
Benachbarte Zahlen bedeuten in allen Zeichnungen benach¬ barte Frequenzgruppen. Je größer der Unterschied zwischen den Zahlen ist, umso größer ist der Abstand der Frequenzen zueinander.Adjacent numbers mean adjacent frequency groups in all drawings. The greater the difference between the numbers, the greater the distance between the frequencies.
In dem ersten Ausführungsbeispiel der vorliegenden Erfindung ist eine nicht-optimierte Frequenzzuteilung für eine Funknetzarchitektur mit 2 x 3 Frequenzgruppen darge¬ stellt.In the first embodiment of the present invention, a non-optimized frequency allocation for a radio network architecture with 2 x 3 frequency groups is shown.
Alle in den Unterlagen offenbarten Angaben und Merkmale, insbesondere die in den Zeichnungen dargestellte Frequenz¬ gruppenzuweisung, werden als erfindungwesentlich bean¬ sprucht, soweit sie gegenüber dem Stand der Technik neu sind. All of the information and features disclosed in the documents, in particular the frequency group assignment shown in the drawings, are claimed to be essential to the invention insofar as they are new compared to the prior art.

Claims

P a t e n t a n s p r ü c h e Patent claims
1. Verfahren zur verbesserten FrequenzZuweisung bei einem zellularen Mobilfunksystem mit Mehrfachver¬ sorgung für eine Funknetzarchitektur eines Mehrfach- Zell-Clusters mit einander überlappenden hexagonalen Zellen, wobei jede hexagonale Zelle gleichzeitig von drei ihrer Ecken durch Feststationen mit der gleichen Frequenzgruppe versorgt wird, d a d u r c h g e k e n n z e i c h n e t, daß die sich überlappen¬ den Sektoren mit nichtbenachbarten Frequenzen belegt werden.1. A method for improved frequency allocation in a cellular mobile radio system with multiple coverage for a radio network architecture of a multiple cell cluster with overlapping hexagonal cells, each hexagonal cell being supplied simultaneously from three of its corners by base stations with the same frequency group, characterized in that the overlapping sectors are occupied with non-adjacent frequencies.
2. Verfahren zur verbesserten FrequenzZuweisung bei einem zellularen Mobilfunksystem nach Anspruch 1, d a d u r c h g e k e n n z e i c h n e t, daß die Frequenzen, die den benachbarten sich überlappen¬ den Sektoren zugewiesen werden, durch zyklische Vertauschung der Frequenzgruppen sowie durch Rotation und Spiegelungen der Anordnung abgeleitet werden. 2. A method for improved frequency allocation in a cellular mobile radio system as claimed in claim 1, which also means that the frequencies which are assigned to the adjacent overlapping sectors are derived by cyclically interchanging the frequency groups and by rotating and mirroring the arrangement.
PCT/EP1994/001537 1993-06-04 1994-05-12 Process for improving frequency allocation in a cellular mobile radio system with multiple power supply WO1994029972A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU69276/94A AU6927694A (en) 1993-06-04 1994-05-12 Process for improving frequency allocation in a cellular mobile radio system with multiple power supply

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4318495A DE4318495C2 (en) 1993-06-04 1993-06-04 Method for improved frequency allocation in a cellular mobile radio system with multiple coverage
DEP4318495.2-35 1993-06-04

Publications (1)

Publication Number Publication Date
WO1994029972A1 true WO1994029972A1 (en) 1994-12-22

Family

ID=6489579

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/001537 WO1994029972A1 (en) 1993-06-04 1994-05-12 Process for improving frequency allocation in a cellular mobile radio system with multiple power supply

Country Status (3)

Country Link
AU (1) AU6927694A (en)
DE (1) DE4318495C2 (en)
WO (1) WO1994029972A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313742A (en) * 1996-05-28 1997-12-03 Motorola Inc Channel allocation in a cellular communication system
US6127988A (en) * 1998-05-05 2000-10-03 Nortel Networks Limited Fixed wireless base station antenna arrangement

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9508639D0 (en) * 1995-04-28 1995-06-14 Ionica Int Ltd Frequency assignment in a cellular radio telecommunications network
US5850608A (en) * 1996-11-08 1998-12-15 Nothern Telecom Limited Directional frequency assignment in a cellular radio system
US6424836B1 (en) * 1999-02-09 2002-07-23 Innowave Eci Wireless Systems Ltd. Method for allocating frequency channels for sectors of a cell in cellular systems

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003911A1 (en) * 1989-09-05 1991-03-21 Motorola, Inc. Cellular radiotelephone communications system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1061412A (en) * 1973-05-15 1979-08-28 Marion L. Cunningham Mobile communication system and method employing directional service area coverage
DE3110347C2 (en) * 1980-03-24 1983-07-21 Western Electric Co., Inc., 10038 New York, N.Y. Process and device for effective use of the frequency spectrum in mobile radio systems
DE3411014A1 (en) * 1984-03-24 1985-09-26 Standard Elektrik Lorenz Ag, 7000 Stuttgart MESSAGE TRANSFER SYSTEM
US5212830A (en) * 1991-05-31 1993-05-18 International Mobile Machines Corporation Radio frequency communications system
DE4141398C2 (en) * 1991-12-16 1994-01-20 Detecon Gmbh Method for improving the radio cell illumination in a cellular mobile radio system and device for carrying out the method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991003911A1 (en) * 1989-09-05 1991-03-21 Motorola, Inc. Cellular radiotelephone communications system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
S. HEERALALL ET AL: "High capacity cellular patterns for land mobile radio systems using directionnal antennas", I.E.E PROCEEDINGS, vol. 136, no. 1, February 1989 (1989-02-01), STEVENACE, HERTS (GB), pages 75 - 80, XP000007119 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2313742A (en) * 1996-05-28 1997-12-03 Motorola Inc Channel allocation in a cellular communication system
US6127988A (en) * 1998-05-05 2000-10-03 Nortel Networks Limited Fixed wireless base station antenna arrangement

Also Published As

Publication number Publication date
AU6927694A (en) 1995-01-03
DE4318495A1 (en) 1994-12-08
DE4318495C2 (en) 1999-09-02

Similar Documents

Publication Publication Date Title
DE69825224T2 (en) Method for allocating frequency carriers in a cellular system
DE69637119T2 (en) Method and program for managing adjacent channel interference by means of power control and guided channel allocation
EP0681776B2 (en) Process for allocating frequencies to base stations of a mobile radiotelephone network
DE602005004619T2 (en) Allocation of limited power frequencies to improve intercell interference
DE4319521C2 (en) Process for the reduction and enlargement of edge-illuminated radio cells in cellular networks with multiple coverage
DE69433396T2 (en) Radio channel allocation method for mobile communication system
DE69829749T2 (en) CHANNEL ALLOCATION PROCESS
EP0111971A1 (en) Method and control device for the distribution of the volume of traffic among different control channels of a radio network
EP0852076A1 (en) Aerial for a central station of a point-to-multi-point radio link system
EP0111970A1 (en) Method and control device for the distribution of the volume of traffic among different control channels of a radio network
DE69531970T2 (en) Frequency plan for a cellular mobile radio system with frequency hopping
EP1188261B1 (en) Alternating upwards link/downwards link transitions in the channel allocation in a tdd-transmission frame with several switching instants
DE3130176A1 (en) Method for dynamic time slot allocation of the organisation channel of cellular mobile radio networks depending on traffic volume
WO1994029972A1 (en) Process for improving frequency allocation in a cellular mobile radio system with multiple power supply
DE69824190T2 (en) PRELIMINARY ESTIMATION OF THE SIGNAL INTERFERENCE RATIO IN A CELLULAR RADIO COMMUNICATION NETWORK
EP1386507B1 (en) Method for assigning frequencies to base stations of a mobile telephone network
EP0212113B1 (en) Radiotelephonic network for a radio area which is divided into cells
DE2923088A1 (en) RADIO NETWORK WITH CELL STRUCTURE
DE3012141C2 (en) Mobile radio system with network-wide synchronization
DE19839633C2 (en) Control device for assigning input signals to transmission channels
DE4403483A1 (en) Re-ordering of frequency hopping gps. for FDM-TDM radio transmission
EP2086257B1 (en) Method for dynamic allocation of resources from a number of cells of a cellular network
WO1994004005A1 (en) Process and device for a microcellular common-channel radio system
EP2086256B1 (en) Method for optimum allocation of resource requirements to a number of cells of a cellular network
DE3049011C2 (en)

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): AT AU BB BG BR BY CA CH CN CZ DE DK ES FI GB HU JP KP KR KZ LK LU LV MG MN MW NL NO NZ PL PT RO RU SD SE SI SK UA US UZ VN

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH DE DK ES FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: CA