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WO2001048965A2 - Verification automatique de stations de base emetteurs-relais sans fil - Google Patents

Verification automatique de stations de base emetteurs-relais sans fil Download PDF

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Publication number
WO2001048965A2
WO2001048965A2 PCT/US2000/042289 US0042289W WO0148965A2 WO 2001048965 A2 WO2001048965 A2 WO 2001048965A2 US 0042289 W US0042289 W US 0042289W WO 0148965 A2 WO0148965 A2 WO 0148965A2
Authority
WO
WIPO (PCT)
Prior art keywords
transceiver
test signal
isolation
channel
backhaul
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/US2000/042289
Other languages
English (en)
Other versions
WO2001048965A3 (fr
Inventor
Thomas Schmutz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
AirNet Communications Corp
Original Assignee
AirNet Communications Corp
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 AirNet Communications Corp filed Critical AirNet Communications Corp
Priority to AU39700/01A priority Critical patent/AU3970001A/en
Publication of WO2001048965A2 publication Critical patent/WO2001048965A2/fr
Publication of WO2001048965A3 publication Critical patent/WO2001048965A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/14—Relay systems
    • H04B7/15—Active relay systems
    • H04B7/155—Ground-based stations
    • H04B7/15564—Relay station antennae loop interference reduction
    • H04B7/15578—Relay station antennae loop interference reduction by gain adjustment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/0082—Monitoring; Testing using service channels; using auxiliary channels
    • H04B17/0085—Monitoring; Testing using service channels; using auxiliary channels using test signal generators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/40—Monitoring; Testing of relay systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements

Definitions

  • the present invention relates to wireless communications systems and
  • BTS broadband base transceiver station
  • PCS Communications Services
  • translator base any combination of town, highway or rural setting.
  • translator base any combination of town, highway or rural setting.
  • translator base any combination of town, highway or rural setting.
  • a single BTS can be configured to control a larger coverage area at lower costs. For example, a single BTS can be configured to control a larger coverage area at lower costs. For example, a single BTS can be configured to control a larger coverage area at lower costs. For example, a single BTS can be configured to control a larger coverage area at lower costs. For example, a single BTS can be configured to control a larger coverage area at lower costs. For example, a single BTS can
  • Some wireless translator base stations use in-band radio frequency
  • channels that is, frequency allocations that are assigned to the service provider
  • translator base stations in Carney can employ a band plan wherein the ground
  • isolation must be
  • receiver connected to the backhaul antenna must receive an in-band carrier
  • a technician attaches a signal generator to the translator backhaul transmit antenna, attaches a spectrum analyzer to the translator
  • ground link receive antennas and broadcasts a low level signal from the signal
  • ground sector transceiver for communicating with a plurality of mobile
  • the method includes generating a test signal in the ground
  • the backhaul transceiver to receive the test signal and receiving the test signal
  • test signal in the backhaul transceiver at a selected frequency and power level
  • the method includes the step of comparing the
  • the method can also include automatically
  • a wireless translator base station having a first and second wireless transceiver.
  • first transceiver using a first transceiver antenna
  • transceiver channel based on a power of the received test signal.
  • the method can further include generating a second test signal in
  • the second transceiver at a selected frequency and power level; transmitting the
  • transceiver antenna and automatically determining an isolation of the second transceiver channel relative to the first transceiver channel based on a power of
  • the method as described herein can also be embodied in an apparatus
  • the base station advantageously includes a first transceiver for
  • circuit for controlling the first and second transceivers. The control
  • circuit controls the first transceiver for generating and transmitting a test signal
  • controller automatically tunes the second transceiver to the frequency of the test
  • transceiver control circuit also determines an isolation of the first transceiver
  • circuit can control the second transceiver to generate and transmit a second test
  • the control circuit automatically tunes the first transceiver to the frequency of
  • the second test signal for receiving the second test signal using the first transceiver antenna, and automatically determines an isolation of the second
  • transceiver channel relative to the first transceiver channel based on a received
  • transceiver control circuit can also be configured to control the first or second
  • warning indication for indicating an isolation fault when an isolation between
  • FIG. 2 is an exemplary arrangement of the wireless communications
  • FIG. 3 is a block diagram of an exemplary arrangement of a wireless
  • Figs. 4A and 4B together comprise a flow chart illustrating a process for
  • FIG. 1 is a block diagram of a conventional wireless communications
  • wireless translators are deployed in peripheral cells of a
  • the system 10 can include translator omni ⁇
  • BTS antennas 14 BTS antennas 14
  • broadband base transceiver stations BTS antennas 14
  • System 10 can further include mobile
  • mobile subscriber units 18-1 and 18-2 (collectively mobile units 18).
  • Translators 12 conventionally receive radio signals from mobile units 18
  • BTS's 15 through BTS antennas 14 are forwarded by translators 12 to mobile
  • BTS's 15 are responsible for demodulating signals received from
  • PSTN Public Switched Telephone Network
  • BTS's 1 5 modulate signals received from the PSTN
  • FIG. 2 illustrates the basic operation of a typical translator base station
  • translator 1 2 transmits signals to and receives
  • translator 1 2 preferably employs
  • directional antenna 1 3 to transmit and receive signals over backhaul channel 31 .
  • translator 1 2 preferably
  • translator 1 2 can incorporate a band plan
  • backhaul channel 31 and ground link channel 32 are relatively near in
  • transceivers 20 and 21 are each
  • frequencies of operation for one such transceiver preferably include the
  • transceiver 20 is preferably
  • transceiver 21 capable of at least receiving on the frequencies assigned to transceiver 21 and
  • translator 1 2 is capable of being fitted with
  • Each transceiver is preferably configured so that receive and
  • transmit frequency selection can be performed by microprocessors 39 and 40,
  • a signal typically ranging
  • the signal is mixed down to intermediate frequency or IF.
  • Analog-to-digital converter 32A (or 32B) then converts the analog IF signal into
  • digital downconverter 34A (or
  • the signal After being converted to complex baseband, the signal is demodulated by
  • digital signal processor 35A and is then transferred to digital signal processor
  • digital-to-analog converter 31 C converts the signal back to an analog
  • control circuits can be in the form of general purpose
  • a programmable microprocessor interfaced with the transceiver, a programmable microprocessor
  • transceivers integrated with the transceivers with appropriate software, a hardware based controller, or any other combination of microprocessors, electronic circuitry and
  • control circuits include
  • Master processor 40 is also linked with PCM data and
  • Control processor 39 is preferably a slave processor controlled by master
  • Control processor 39 can also preferably control the operation of
  • ground sector transceiver 20 including selection of transceiver receive and
  • Analog-to-digital converter 32C converts
  • upconverter 33A After the signal is translated to real IF, digital-to-analog
  • converter 31 A converts the signal back to an analog signal.
  • Upconverter 27A Upconverter 27A,
  • the signal for transmission.
  • the signal is then amplified by high-power amplifier 23,
  • 60dB has been found to be
  • the present invention concerns the
  • step 41 the isolation self test process is initiated. Such testing can be initiated in one of several ways.
  • an on-site technician can manually input commands
  • the master processor can be configured to automatically
  • master processor 40 in step 42 causes digital signal processor 35A in ground
  • sector transceiver 20 to generate digital data corresponding to a selected or
  • This test signal is translated
  • oscillator 30A and synthesizer module 29A combine to mix the test signal for
  • test signal is transmitted from omni-directional
  • step 46 master processor 40 tunes backhaul
  • transceiver 21 to receive the transmitted test signal by making appropriate
  • step of tuning backhaul transceiver 21 may be performed either before or after
  • test signal is initiated in step 42. However, if the test signal is initiated first,
  • test signal preferably continues to be transmitted until after the receive frequency of backhaul transceiver 21 has stabilized on the selected or
  • test signal received in backhaul transceiver 21 is mixed down to
  • processor 35B located in backhaul transceiver 21 determines the power level of
  • step 50 this signal level is
  • DSP 35B preferably communicated by DSP 35B to master processor 40 which compares
  • Master processor 40 determines in step 50 whether
  • test signal as received
  • a predetermined minimum e.g. 60dB
  • This isolation fault message can be communicated to the
  • warning signal can be also transmitted to BTS 1 5 via backhaul link 31 . Additionally, master processor 40, if necessary, can instruct ground sector
  • transceiver 20 to shut down transmission by sending appropriate messages to
  • step 52 the test signal using omni-directional antennas 1 1 A and 1 1 B. That is, in step 52
  • master processor 40 instructs digital signal processor 35B in backhaul
  • transceiver 21 to generate digital data corresponding to a selected or
  • This test signal is translated to real IF
  • digital upconverter 33B is converted to an analog signal by digital-to-
  • Master processor 40 also tunes ground
  • tuning step 56 can be performed either before or after the test signal is
  • transmitted test signal is preferably continued for a sufficient time to permit
  • ground sector transceiver to stabilize on the selected frequency and receive the
  • test signal Once received, the test signal is mixed down to IF, digitized and translated to complex baseband. Thereafter, in step 58, digital signal processor
  • 35A determines the power level of the received test signal. This information is
  • master processor 40 generates an isolation fault
  • This fault message can be used to activate an external
  • master processor 40 can
  • backhaul transceiver 21 also instruct backhaul transceiver 21 to shut down transmission.
  • step 64 the system will proceed in step 64 to generate a message indicating that
  • transceiver antennas as may be used in those translators employing bi-sector

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)

Abstract

La présente invention concerne, dans une station de base émetteur-relais sans fil comportant un émetteur-récepteur de secteur terrien destiné à communiquer avec une pluralité d'unités d'abonnés mobiles et un émetteur-récepteur de liaison secondaire destiné à communiquer avec une station d'émission et de réception, un procédé permettant de mesurer automatiquement l'isolation entre le canal de la liaison secondaire et le canal de la liaison terrestre afin d'empêcher l'oscillation et/ou la désensibilisation du récepteur. A cette fin, on génère dans l'émetteur-récepteur de secteur terrien un signal d'essai à une fréquence et un niveau de puissance choisis ou prédéterminés, qui est transmis depuis l'antenne du secteur terrien et reçu par l'émetteur-récepteur de liaison secondaire. On compare ensuite le niveau de puissance du signal d'essai reçu avec le niveau de puissance du signal d'essai transmis. De la même manière, on génère dans l'émetteur-récepteur de liaison secondaire un signal d'essai à une fréquence et un niveau de puissance choisis ou prédéterminés, qui est transmis par l'émetteur-récepteur de liaison secondaire et reçu par l'émetteur-récepteur du secteur terrien. On compare ensuite le niveau de puissance du signal d'essai reçu avec le niveau de puissance du signal d'essai transmis. Si l'une des comparaisons révèle une isolation incorrecte entre les signaux d'essai transmis et les signaux d'essai reçus, on génère un signal d'avertissement et la transmission est interrompue.
PCT/US2000/042289 1999-12-29 2000-11-28 Verification automatique de stations de base emetteurs-relais sans fil Ceased WO2001048965A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU39700/01A AU3970001A (en) 1999-12-29 2000-11-28 Automatic testing of wireless translator base stations

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US17342199P 1999-12-29 1999-12-29
US60/173,421 1999-12-29
US69199500A 2000-10-19 2000-10-19
US09/691,995 2000-10-19

Publications (2)

Publication Number Publication Date
WO2001048965A2 true WO2001048965A2 (fr) 2001-07-05
WO2001048965A3 WO2001048965A3 (fr) 2002-05-10

Family

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Application Number Title Priority Date Filing Date
PCT/US2000/042289 Ceased WO2001048965A2 (fr) 1999-12-29 2000-11-28 Verification automatique de stations de base emetteurs-relais sans fil

Country Status (2)

Country Link
AU (1) AU3970001A (fr)
WO (1) WO2001048965A2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009092320A1 (fr) * 2008-01-18 2009-07-30 Huawei Technologies Co., Ltd. Procédé de détection, dispositif de détection et puce logique
WO2011054428A1 (fr) * 2009-11-03 2011-05-12 Rohde & Schwarz Gmbh & Co. Kg Dispositif et procédé de mesure pour la mesure stationnaire de stations-relais de téléphonie mobile

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115514A (en) * 1987-08-03 1992-05-19 Orion Industries, Inc. Measuring and controlling signal feedback between the transmit and receive antennas of a communications booster
US5970410A (en) * 1996-02-27 1999-10-19 Airnet Communications Corp. Cellular system plan using in band-translators to enable efficient deployment of high capacity base transceiver systems
US5960353A (en) * 1996-12-24 1999-09-28 Lucent Technologies, Inc. Microcell load measurement using feedback control

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009092320A1 (fr) * 2008-01-18 2009-07-30 Huawei Technologies Co., Ltd. Procédé de détection, dispositif de détection et puce logique
WO2011054428A1 (fr) * 2009-11-03 2011-05-12 Rohde & Schwarz Gmbh & Co. Kg Dispositif et procédé de mesure pour la mesure stationnaire de stations-relais de téléphonie mobile

Also Published As

Publication number Publication date
AU3970001A (en) 2001-07-09
WO2001048965A3 (fr) 2002-05-10

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