WO2009146577A1 - Dispositif et procédé de positionnement intérieur sans fil dans un système d'antennes réparties - Google Patents

Dispositif et procédé de positionnement intérieur sans fil dans un système d'antennes réparties Download PDF

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Publication number
WO2009146577A1
WO2009146577A1 PCT/CN2008/001114 CN2008001114W WO2009146577A1 WO 2009146577 A1 WO2009146577 A1 WO 2009146577A1 CN 2008001114 W CN2008001114 W CN 2008001114W WO 2009146577 A1 WO2009146577 A1 WO 2009146577A1
Authority
WO
WIPO (PCT)
Prior art keywords
virtual beacon
virtual
downlink information
remote wireless
multiplexed
Prior art date
Application number
PCT/CN2008/001114
Other languages
English (en)
Chinese (zh)
Inventor
倪巍
史青
冷晓冰
王继康
Original Assignee
上海贝尔阿尔卡特股份有限公司
阿尔卡特朗讯
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 上海贝尔阿尔卡特股份有限公司, 阿尔卡特朗讯 filed Critical 上海贝尔阿尔卡特股份有限公司
Priority to PCT/CN2008/001114 priority Critical patent/WO2009146577A1/fr
Priority to CN200880129668.9A priority patent/CN102057294B/zh
Publication of WO2009146577A1 publication Critical patent/WO2009146577A1/fr

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/04—Details
    • G01S1/042—Transmitters
    • G01S1/0428—Signal details

Definitions

  • the present application relates to indoor wireless positioning and, more particularly, to an indoor wireless positioning apparatus and method for use in a distributed antenna system that can improve positioning accuracy.
  • DAS distributed antenna system
  • the topology of the wireless positioning system is as shown in Fig. 1, wherein the control management units (CMU) 14-1 and 14-2 and the remote wireless repeaters (RRH) 15-1 to 15-3 and 16-1 to 16-3 are Network unit for indoor digital distributed antenna system (DDAS).
  • Each RRH transmits information to the terminal through the service carrier ft.
  • the service carrier ft covers multiple rooms of the building.
  • the challenge of positioning in DAS can be summarized as the inability to identify terminals at the RRH level, since the summation or selection of wireless signals is performed at the CMU, thereby enabling the Radio Network Controller (RC) 12 and the Serving Mobile Location Center (SMLC) 11 Unable to obtain RRH information 'eg RRH ID and wireless signal arrival time difference TDOA from/to each RRH.
  • the SMLC 11 is logically independent of the RNC 12, but in most cases is physically placed with the RNC 12 or embedded in the RKC 12.
  • the topology of the DDAS is a tree or a star, and downlink signals are copied from the base stations (BS) 13-1 and 13-2 via the CMUs 14-1 and 14-2 and distributed to multiple RRHs. .
  • the same signals transmitted by multiple cooperative RRHs are naturally merged together during the propagation process, and the terminal equipment cannot distinguish these signals.
  • This inherent problem makes the current indoor positioning system unable to provide high-precision positioning. Therefore, it is impossible for the terminal to obtain positioning parameters of each radio propagation channel between the RRH and the terminal, such as a time difference of arrival (TDOA) and a signal strength of the receiver. It is not possible to estimate the corresponding distance between the RRH and the terminal to be located. Therefore, the popular triangulation-based E-OTD positioning method does not work effectively.
  • TDOA time difference of arrival
  • a cell with multiple RRHs typically provides coverage for multiple rooms, halls, or even floors, so the method of using cell IDs does not achieve high precision positioning.
  • an indoor positioning system that has not yet modified the BS can be applied to the DAS.
  • the first reason is that the E-OTD method does not work because the multiple RRHs serve the same cell and the terminal cannot identify different propagation channels from multiple RRHs.
  • the second reason is, for the indoor situation [Multiple distributed RRHs provide coverage for a single cell, so that the cell ID method does not give satisfactory accuracy.
  • E-OTD and cell ID do not work in DAS indoor environments. Summary of the invention
  • the present invention has been made in view of the above problems. It is an object of the present invention to provide an apparatus and method for indoor positioning that can improve positioning accuracy.
  • an apparatus for indoor positioning in a distributed antenna system comprising a plurality of remote wireless repeaters, the apparatus comprising: virtual beacon generating means for generating at least one for each of the remote wireless repeaters a specific corresponding virtual beacon; and multiplexing means for multiplexing the at least one virtual beacon with the downlink information.
  • a virtual beacon generating device includes a scrambling unit for scrambling a signal of a predetermined channel using a scrambling code of a particular remote wireless repeater.
  • the predetermined channel comprises at least one of a synchronization channel, a common pilot channel and a primary common control physical channel.
  • the multiplexing means is adapted to code reuse of the at least one virtual beacon and the downlink information.
  • the apparatus further comprises transmitting means for transmitting the multiplexed virtual beacon and the downlink information.
  • the apparatus further comprises transmitting means for transmitting the multiplexed virtual beacon with a transmission power lower than the downlink information.
  • the apparatus further comprises means for establishing a correlation table for the located remote wireless repeater and the virtual beacon.
  • the apparatus further comprises means for performing a positioning operation using a virtual beacon.
  • a method for indoor positioning in a distributed antenna system comprising a plurality of remote wireless repeaters, the method comprising the steps of: generating at least one particular corresponding virtual signal for a remote wireless repeater, respectively And multiplexing at least one virtual beacon with downlink information.
  • the step of generating at least one particular virtual beacon for a remote wireless repeater comprises: scrambling a signal of a predetermined channel using a scrambling code of a particular remote wireless repeater.
  • the predetermined channel comprises a synchronization channel, a common pilot channel and a main common control At least one of the channels.
  • multiplexing the at least one virtual beacon with the downlink information comprises: code multiplexing the at least one virtual beacon and the downlink information.
  • the method further comprises the step of transmitting the multiplexed virtual beacon and downlink information. According to an embodiment of the invention, the method further comprises the step of transmitting the multiplexed virtual beacons at a transmission power lower than the downlink information.
  • the method further comprises the step of establishing a correlation table for the located remote wireless repeater and the virtual beacon.
  • the method further comprises the step of performing a positioning operation using a virtual beacon.
  • FIG. 1
  • FIG. 2 shows a block diagram of a DDAS in accordance with the present application
  • FIG. 3 shows an exemplary block diagram of the RRH shown in FIG. 2;
  • Figure 4 illustrates indoor positioning via virtual beacons
  • Figure 5 shows an exemplary mapping table maintained in an RNC or SMLC.
  • the challenge of positioning in DAS is that terminals cannot be identified at the RRH level due to the summation of wireless signals or
  • the selection is made at the CMU so that the RNC and the Serving Mobile Location Center SMLC are unable to obtain RKH information, such as the RRH ID and the time of arrival (TOA) from/to each RRH.
  • RKH information such as the RRH ID and the time of arrival (TOA) from/to each RRH.
  • TOA time of arrival
  • each RRH is also composed of a synchronization channel, a pilot channel, etc. by using different scrambling codes in the WCDMA system or using a carrier different from one serving cell in the GSM system.
  • Specific beacons Therefore, such a beacon eventually becomes a virtual cell for misleading the terminal, and the terminal cannot distinguish whether it is a true cell.
  • FIG. 2 shows a block diagram of a DDAS in accordance with the present application.
  • the digital DAS according to the present invention includes SMLC 21, RNC 22, BS 23-1 and 23-2, CMU 24-1 and 24-2, and RRH 25-1 to 25-3 and 26-1.
  • the BS is connected to the RNC/S LC
  • the CMUs 24-1 and 24-2 are connected to BS 23-1 and 23-2, respectively, for copying and distributing downlink signals to multiple RRHs.
  • each of the RRHs 25-1, 25-2, 25-3 and 26-1, 25-2, 26-3 generates and transmits virtual beacons 51, 52, 53 in addition to the signals of the real serving cell. And 61, 62, 63.
  • the virtual beacon is a synchronization channel (SCH), a common pilot channel (CPICH), and possibly a main common control physical channel (primary CCPCH) that provides coverage and communication for the cell at the same frequency.
  • SCH synchronization channel
  • CPICH common pilot channel
  • primary CCPCH main common control physical channel
  • the virtual beacon is scrambled by the scrambling unit 31 with a scrambling code corresponding to the RRH, and then the scrambled beacon is multiplexed by the code multiplexer 32 with the downlink signal of the serving cell.
  • the virtual beacon can indicate a virtual cell with no useful data transfer. Therefore, the terminal can distinguish the virtual cells and get specific information corresponding to the cells included in these channels.
  • E-OTD and E-CID positioning methods are effective.
  • Using virtual beacons allows these methods to function almost as much as positioning in an outdoor scene.
  • the terminal When the request is initiated, the terminal measures the positioning parameters, such as the time difference of arrival TDOA and the received power.
  • the terminal measures the TDOA of the virtual beacons of multiple RHs and the received signal strength RSS, and also measures the TDOA of the serving cell and the received signal strength RSS.
  • TDOA of the serving cell is measured due to coherent combining or RRH selection resulting in loss of information such as accurate and useful delay and received power. Or RSS is meaningless.
  • the virtual beacon of a particular RRH makes it possible and easy for the terminal to estimate the useful TDOA and RSS from each RRH.
  • the coverage of each virtual beacon is drawn less than the coverage of the serving cell.
  • the transmission power of the virtual beacon of the same RRH for example, 51, 52 or 53, is lower than the transmission power of the serving cell by a specific interval, in dB, for avoiding the terminal request to switch from the serving cell to the virtual Community. This keeps the RNC from making any changes.
  • the standard procedure is described as follows:
  • the terminal reports the measured values to R C 22 and SMLC 21, and SMLC 21 performs a positioning algorithm on the measured results. Therefore, the positioning operation is completely transparent to BS 13-1 and 13-2 and CMUs 14-1 and 14-2.
  • the terminal When the serving mobile positioning center SMLC 21 or the terminal initiates a positioning request, the terminal measures the positioning parameters of the serving cell or the virtual cell and reports to the SMLC.
  • a mapping table is embedded in the SMLC 21 for indicating the relationship between the RH location and the virtual cell, making it easy for the SMLC to obtain the location of the desired terminal via an existing standard method such as E-OTO or B-CID.
  • the SMLC 21 must know the existence of the virtual beacon because, in the reported measurements, the measured value of the serving cell will be discarded, and the SMLC uses only multiple virtual beacons for accurate positioning by the E-OTD method. . If the cell ID method is used, the measured positioning parameters of the serving cell and the virtual beacon should be uniformly considered for better accuracy.
  • the MS may send a request to switch from the serving cell to the virtual cell indicated by the virtual beacon.
  • the power of each RH transmitting the virtual beacon is lower than the power of the transmitting serving cell by a certain interval, so that the RNC 21 remains unchanged. Otherwise, in this case the RNC 21 must know the virtual beacon.
  • the KNC 21 receives the handover request and the signal to noise ratio SNR measurement, the RNC 21 ignores the request and does not allow any handover to the virtual cell.
  • These virtual cells are for the BS. 23-1 and 23-2 are not visible, but are visible to the terminal.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un dispositif de positionnement intérieur dans un système d'antennes réparties qui comprend une pluralité de têtes radio éloignées. Le dispositif comprend: des moyens de production de balises virtuelles pour produire au moins une balise virtuelle particulière correspondante destinée à la tête radio éloignée, respectivement; et des moyens de multiplexage pour multiplexer au moins une balise virtuelle avec des données de liaison descendante.
PCT/CN2008/001114 2008-06-06 2008-06-06 Dispositif et procédé de positionnement intérieur sans fil dans un système d'antennes réparties WO2009146577A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/CN2008/001114 WO2009146577A1 (fr) 2008-06-06 2008-06-06 Dispositif et procédé de positionnement intérieur sans fil dans un système d'antennes réparties
CN200880129668.9A CN102057294B (zh) 2008-06-06 2008-06-06 用于分布式天线系统中室内无线定位的设备和方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2008/001114 WO2009146577A1 (fr) 2008-06-06 2008-06-06 Dispositif et procédé de positionnement intérieur sans fil dans un système d'antennes réparties

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WO2009146577A1 true WO2009146577A1 (fr) 2009-12-10

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Cited By (2)

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CN105848184A (zh) * 2011-02-22 2016-08-10 高通股份有限公司 定位具有相同的物理小区身份(pci)的远程无线头端(rrh)的位置
US10849205B2 (en) 2015-10-14 2020-11-24 Current Lighting Solutions, Llc Luminaire having a beacon and a directional antenna

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CN102740350B (zh) * 2011-12-28 2015-11-25 华为技术有限公司 一种室内定位方法、设备及系统
CN105491658A (zh) * 2014-09-18 2016-04-13 杭州华为数字技术有限公司 终端设备的定位方法、装置和系统
CN105657820B (zh) * 2014-11-14 2019-01-29 上海诺基亚贝尔股份有限公司 一种用于定位室内的目标用户设备的方法及装置
CN104535961B (zh) * 2014-12-15 2019-08-06 中兴通讯股份有限公司 一种实现无线定位的方法、系统及定位位置计算装置
CN106060782A (zh) * 2016-07-21 2016-10-26 刘儿兀 一种基于分布式天线系统和测量报告的室内定位系统和方法

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Publication number Priority date Publication date Assignee Title
CN105848184A (zh) * 2011-02-22 2016-08-10 高通股份有限公司 定位具有相同的物理小区身份(pci)的远程无线头端(rrh)的位置
CN105848184B (zh) * 2011-02-22 2020-05-05 高通股份有限公司 定位具有相同的物理小区身份(pci)的远程无线头端(rrh)的位置
US10849205B2 (en) 2015-10-14 2020-11-24 Current Lighting Solutions, Llc Luminaire having a beacon and a directional antenna

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Publication number Publication date
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CN102057294A (zh) 2011-05-11

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