FI114537B - Anordning och förfarande för minskande av kollisioner mellan meddelanden från mobilteleapparater som samtidigt eftersträvar kontakt med en basstation i ett CDMA-mobilkommunikationssystem - Google Patents

Anordning och förfarande för minskande av kollisioner mellan meddelanden från mobilteleapparater som samtidigt eftersträvar kontakt med en basstation i ett CDMA-mobilkommunikationssystem Download PDF

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Publication number
FI114537B
FI114537B FI944055A FI944055A FI114537B FI 114537 B FI114537 B FI 114537B FI 944055 A FI944055 A FI 944055A FI 944055 A FI944055 A FI 944055A FI 114537 B FI114537 B FI 114537B
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Prior art keywords
message
predetermined
delay
time
base station
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FI944055A
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English (en)
Finnish (fi)
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FI944055A0 (sv
FI944055A (sv
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Roberto Padovani
Lindsay A Weaver Jr
Edward G Tiedemann Jr
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Qualcomm Inc
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7073—Synchronisation aspects
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • 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
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/0022—PN, e.g. Kronecker
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/16—Code allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/1887—Scheduling and prioritising arrangements
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/48—TPC being performed in particular situations during retransmission after error or non-acknowledgment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04—TPC
    • H04W52/38—TPC being performed in particular situations
    • H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/7097—Direct sequence modulation interference
    • H04B2201/709709—Methods of preventing interference
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
    • H04L1/1867—Arrangements specially adapted for the transmitter end
    • H04L1/188—Time-out mechanisms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0866—Non-scheduled access, e.g. ALOHA using a dedicated channel for access

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

Claims (15)

1. Fördröjningsapparat för att reducera kollisioner mellan sända meddelanden i ett datakommunikations- 5 nät, där meddelandet är en direkt spridningspek- trumssignal som änvänder en PN-kodsekvens pä peri-odhastighet pä kanalen, kännetecknad därav, att ap-paraten omfattar: processormedel (100) för av ett meddelande; en tidsättningsgenerator (136) för att 10 bilda en fördröjningstid som svar pä den nämnda unika identifierarekoden, där fördröjningtiden är större eller lika stor som en period, men kortare än själva meddelandet; en kodare (140) för att för-döja meddelandet med fördröjningstiden; och en sän-15 dare (188) för sändning av det fördröjda meddelandet tili en mottagare under den definierade tidspe-rioden enligt den unika identifierarekoden.
2. Fördröjningsapparat enligt patentkrav 1, känneteck- 20 nad därav, att det säntda fördröjda meddelandet är en direktsekvensspridningspektrumssignal, som är spritt med hjälp av PN-kodsekvensen, som har en : chiphastighet; och att fördröjningstiden är större eller lika stor som en chip. \ 25
> ’! 3. Fördröjningsapparat enligt patentkrav 2, känneteck- ;; nad därav, att apparaten omfattar en slumptalsgene- ’ * rator; och en PN-kodsekvensgenerator (146), med 30 vilken en PN-kodsekvens väljs slumpmässigt frän den förutbestämt mängd PN-kodsekvenser som svar pä ett slumptal, som mottagits frän slumptalgeneratorn.
4. Fördröjningsapparat enligt patentkrav 3 känneteck-35 nad därav, att apparaten omfattar indikatormedel • för givning en kvitteringsindikation som svar pä 27 114537 kvitteringen fran mottagaren; en klocka, som mäter tiden mellan sändningen av ett meddelande och en kvitteringsindikationen och som ger en tidsavbryt-ningssignal, om den mätta tiden överskrider den 5 förutbestämt tidsavbrytningsparametern; och proces-sormedel, med vilka ett tilläggsmeddelande ges som svar pä tidsavbrytningssignalen.
5. Fördröjningsapparat enligt patentkrav 4, känneteck- 10 nad därav, att den omfattar ett utvärderingsräkne- verk för att räkna successiva meddelanden, där ut-värderingsräkneverket nollställs, när ett förutbe-j stämt maksimiutvärderingtal näs; en effektstyrenhet j kopplad tili en sändare (188), med hjälp av vilken 15 en effekt adderas tili de successiva meddelandena, vilken effekt är i sitt förutbestämda minimumvärde, när utvärderingsräkneverket är nollställt.
6. Fördröjningsapparat enligt patentkrav 5, kanneteck- 20 nad därav, att effektstyrenheten adderar effekten i tili de successiva meddelandena enligt en förutbe- stämd ökning.
» | : 7. Fördröjningsapparat enligt patentkrav 6, känneteck- , : 25 nad därav, att processormedlen är placerade mellan * returneringsfördröjningens successiva meddelande som svar pä tidavbrytningssignalen, där returne-ringsfördröjningen motsvarar ett annat slumptal. 30
8. Fördröjningsapparat enligt patentkrav 7, känneteck- : nad därav, att den processormedlen inte ger en med- ' delande när utvärderingsräkneverket är nollställt och det tredje slumptalet ligger inom en förutbestämt beständighetsomräde.
9. Förfarande i ett datakommunikationsnät, som har en 35 114537 28 mängd av sändare, som har en unik identifierings-kod, och ätminstone en mottagare, för reducering av kollisioner mellan sända meddelanden, där meddelan-det är en direkt spridningsspektrumssignal som an-5 vänder en PN-kodsekvens päperiodhasdtighet i kana- len, kännetecknat därav, att förfarandet omfattar följande faser upprepade: generering av ett medde-lande; fördröjning av meddelandet med en fördröj-ningstid, där motsvarar en identifieringskod, som 10 fördröjningstiden är större eller lika stor som en period, men kortare än själva meddelandet; och sändning av det fördröjda meddelandet tili en mottagare, da meddelandet har en viss effektnivä. 15
10. Förfarande enligt patentkrav 9 för att reducera kollisioner mellan meddelanden, kännetecknat därav, att det sända fördröjda meddelandet är en direkt-sekvensspridspektrumssignal, som är spritt med hjälp av en PN-kodsekvens, som har en chiphastig-20 het; och att fördröjningstiden är större eller lika stor som en chip. | j
11. Förfarande enligt patentkrav 10 för att reducera ! kollisioner mellan meddelanden, kännetecknat därav, ; 25 att före sändningsf asen f inns f asema: en PN- ;· kodsekvens väljs slumpmässigt frän en förutbestämd . mängd av kodsekvenser; och ett fördröjt meddelande moduleras med en vald PN-kodsekvens. 30
12. Förfarande enligt patentkrav 11, för att reducera ;;; kollisioner mellan meddelanden, som vidare omfattar en fas, där en kvitteringssignal följs frän en mot-: tagaren under en förutbestämd tids tidsutlösnings- .tid. Λ 35
·” 13. Förfarande enligt patentkrav 12 för att reducera 1 1 4537 29 kollisioner mellan meddelanden, kännetecknat därav, att sändningsfasen föregäs av faserna: generering av det första slumptalet; och vai av en returne-ringstidperiodl frän en förutbestämt omräde som 5 svar pä det första slumptalet; väntas under en en returneringstidperiod.
14. Förfarande enligt patentkrav 13 för att reducera kollisioner mellan meddelanden, som vidare omfattar 10 faserna: förhöjning av effektnivän med ett förutbe stämt effekttillägg; förhöjning av utvarderingsta-let; jämförelse av utvärderingstalet med längden av den förutbestämda utvärderingssekvensen; och ställ-ning av effektnivän tili det förutbestämda utgängs- 15 värde, när utvärderingstalet är lika stort som den förutbestämda utvärderingssekvensens längd.
15. Förfarande enligt patentkrav 15 för att reducera kollisioner mellan meddelanden, kännetecknat därav, 20 att den vidare omfattar faserna:ett andra slumptal genereras upprepat och jämförs med en förutbestämd beständighetsparameter, tills det andra slumptalet ; : ligger i omrädet, som motsvarar den förutbestämda j beständighetparametern. : 25 · ·
FI944055A 1992-03-05 1994-09-02 Anordning och förfarande för minskande av kollisioner mellan meddelanden från mobilteleapparater som samtidigt eftersträvar kontakt med en basstation i ett CDMA-mobilkommunikationssystem FI114537B (sv)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US84715292A 1992-03-05 1992-03-05
US84715292 1992-03-05
US9301982 1993-03-04
PCT/US1993/001982 WO1993018601A1 (en) 1992-03-05 1993-03-04 Apparatus and method for reducing message collision between mobile stations simultaneously accessing a base station in a cdma cellular communications system

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FI944055A0 FI944055A0 (sv) 1994-09-02
FI944055A FI944055A (sv) 1994-09-02
FI114537B true FI114537B (sv) 2004-10-29

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US (6) US5544196A (sv)
EP (7) EP1746796B1 (sv)
JP (1) JP3152353B2 (sv)
KR (1) KR100202745B1 (sv)
CN (1) CN1072863C (sv)
AT (5) ATE532376T1 (sv)
AU (1) AU677578B2 (sv)
BG (1) BG62022B1 (sv)
BR (1) BR9306032A (sv)
CA (1) CA2130667C (sv)
DE (4) DE69334205T2 (sv)
DK (3) DK2058994T3 (sv)
ES (5) ES2299133T3 (sv)
FI (1) FI114537B (sv)
HK (4) HK1015212A1 (sv)
HU (1) HU214413B (sv)
IL (1) IL104910A (sv)
MX (1) MX9301230A (sv)
PT (2) PT2058994E (sv)
RU (1) RU2171013C2 (sv)
SK (1) SK282136B6 (sv)
WO (1) WO1993018601A1 (sv)
ZA (1) ZA931077B (sv)

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ZA931077B (en) 1994-01-04
US20030199252A1 (en) 2003-10-23
ES2299133T3 (es) 2008-05-16
DE69333883T2 (de) 2006-07-27
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US20060121897A1 (en) 2006-06-08
ATE532376T1 (de) 2011-11-15
RU2171013C2 (ru) 2001-07-20
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DE69334140T2 (de) 2008-01-10
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EP2058994B1 (en) 2011-11-02
AU3790793A (en) 1993-10-05
IL104910A (en) 1996-07-23
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