WO2007014495A1 - Procede et dispositif pour obtenir des donnees gps dans un systeme wcdma - Google Patents

Procede et dispositif pour obtenir des donnees gps dans un systeme wcdma Download PDF

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Publication number
WO2007014495A1
WO2007014495A1 PCT/CN2005/001190 CN2005001190W WO2007014495A1 WO 2007014495 A1 WO2007014495 A1 WO 2007014495A1 CN 2005001190 W CN2005001190 W CN 2005001190W WO 2007014495 A1 WO2007014495 A1 WO 2007014495A1
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WIPO (PCT)
Prior art keywords
information
gps
function unit
positioning
mobile service
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PCT/CN2005/001190
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English (en)
French (fr)
Inventor
Chun Yan Li
Original Assignee
Zte Corporation
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.)
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Publication date
Application filed by Zte Corporation filed Critical Zte Corporation
Priority to PCT/CN2005/001190 priority Critical patent/WO2007014495A1/zh
Priority to CN2005800497210A priority patent/CN101171528B/zh
Publication of WO2007014495A1 publication Critical patent/WO2007014495A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W64/00Locating users or terminals or network equipment for network management purposes, e.g. mobility management
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01SRADIO 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
    • G01S19/00Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/05Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data

Definitions

  • the present invention relates to the field of mobile positioning in a wireless network system, and in particular to a high-precision network-assisted global positioning system (AGPS) in a wideband code division multiple access (WCDMA) system.
  • AGPS network-assisted global positioning system
  • WCDMA wideband code division multiple access
  • Mobile location services in wireless network systems are receiving increasing attention.
  • the main applications of the mobile positioning service include: emergency call location service for user security; location tracking of related criminal activities; personal location services, such as traffic, accommodation and other service industry information; intelligent transportation positioning; wireless network system Design and resource management; billing for wireless network systems, such as determining the cost of communications for certain locations based on call rate.
  • UE User Equipment
  • the geographical location of the mobile subscriber that is, the UE assisted situation, is finally determined by the network side of the wireless network by the measurement of the wireless signal and the base station information of the surrounding cells.
  • the 3GPP The 3rd Generation Partnership Project (3GPP, The 3rd Generation Partnership Project) follows the positioning method of the Global System for Mobile Coordination (GSM) in the description of the positioning method of WCDMA, and has made certain Improve.
  • GSM Global System for Mobile Coordination
  • IPD observed time difference of arrival
  • AGPS Assisted Global Positioning System
  • AGPS Assisted Global Positioning System
  • the network-assisted GPS positioning method utilizes the measurement of the spatial satellite signal, which needs to be added to the receiving device on the ground and the receiver is added to the mobile device.
  • the high-level signaling is required on the UE side or the network side. Participate in transmitting auxiliary data on the wireless interface to help the UE receive satellite signals.
  • the network-assisted GPS positioning accuracy can reach 5m ⁇ 50m, and the positioning accuracy is greatly improved compared with other positioning methods. It is the best positioning method at present, but it requires the mobile station to attach the GPS receiver and wireless interface information transmission.
  • One of the methods for obtaining auxiliary data in the AGPS positioning method is the wireless network controller.
  • RNC Radio Network Controller
  • RNC Radio Network Controller
  • the RNC stores these GPS auxiliary information for AGPS positioning.
  • the effective coverage of a single GPS device has reached 1000 km, and the Node B coverage is much smaller than this range.
  • the multi-Node B sharing a GPS implementation is also complicated, considering that the GPS auxiliary data is stored in the RNC internal independent mobile service positioning.
  • SAS StandAlone Serving Mobi le Location centre
  • an auxiliary data acquisition method that has been commercialized at this stage is to establish a GPS reference network from outside C, obtain auxiliary data information through the GPS device in the reference network, and finally access the WCDMA network by the unified gateway.
  • operators may choose WCDMA equipment from multiple vendors. If an external GPS reference network is used, high-precision AGPS positioning may be hindered due to the lack of uniform standards. Therefore, existing methods still have drawbacks that need to be improved and developed. Summary of the invention
  • the object of the present invention is to provide a method and a device for acquiring AGPS positioning assistance data in WCDMA, which realizes acquisition of high-precision AGPS positioning assistance data, and the method of the present invention is based on the low investment of the GPS device and the large coverage of each RNC device.
  • the provided auxiliary data acquisition method can greatly simplify the implementation difficulty.
  • the built-in GPS device enables each manufacturer to design independently in the device without standardizing the interface between the GPS reference network and the RNC device.
  • a method for acquiring global positioning assistance data in a WCDMA system wherein the wireless network controller in the WCDMA network simultaneously has a GPS function unit when the WCDMA wireless network controller has an independent mobile service positioning center function unit;
  • the method also includes:
  • the GPS function unit in the radio network controller acquires the auxiliary data from the satellite broadcast information, and saves the data to the independent mobile service positioning center functional unit;
  • the auxiliary data is sent out through the radio resource control module
  • the independent mobile service positioning center function unit inside the radio network controller is used to store high-precision positioning assistance data and perform positioning calculation.
  • step b) further comprises: the auxiliary data is broadcast and sent out through the radio resource control module.
  • the step b) further includes: when the specified user equipment needs to be located, after being acquired from the independent mobile service positioning center function unit, the method is sent by the radio resource control module.
  • an internal GPS function unit performs initialization and a process of acquiring basic auxiliary information, and after the GPS function unit is operating normally, GPS information can be obtained, the GPS function The unit sends a message to the independent mobile service location center functional unit confirming that it has begun to receive its request message for assistance data.
  • the information requested by the independent mobile service positioning center function unit to the GPS function unit is: three-dimensional position information of a GPS receiver, ephemeris information received by a GPS receiver, almanac information, and an ionosphere Information, Coordinated Time parameter information, GPS time information, differential GPS information.
  • the radio network controller broadcasts the updated information to each user equipment in a lower cell when the E-star broadcast information is updated, when the radio network controller is to a user equipment
  • the wireless network controller uses the GPS information stored in the internal independent mobile service positioning center as the auxiliary data and sends the auxiliary data together with the self-calculated auxiliary data to the user equipment. So that the user equipment can quickly capture GPS signals for positioning.
  • the user equipment provides GPS assistance data according to the independent mobile service positioning center function unit and location estimation information of the user equipment, and the user equipment itself
  • the information received by the GPS receiver is calculated using a classical GPS calculation method to obtain the location of the user equipment.
  • the method further includes:
  • the mobile station performs GPS phase assistance data using the GPS assistance data provided by the independent mobile service location center;
  • A2 transmitting a code phase measurement result to the unique 5: mobile service positioning center, the independent mobile service positioning center integrated code phase measurement result and the saved GPS information and the mobile station estimated position information, and calculating the same by using a classical GPS calculation method The location of the mobile station.
  • a device for acquiring global positioning assistance data in a WCDMA system wherein the communication is connected to a plurality of base stations, and the base station is connected to the user equipment, wherein the device further comprises: a radio network controller, where the radio network controller is provided with - a built-in GPS function unit, and an independent mobile service positioning center function unit, the GPS function unit is configured to receive satellite broadcast information in real time, and transmit and store to the independent mobile service positioning center by using the wireless controller internal communication mechanism Within the functional unit;
  • a radio resource control module when the auxiliary data information is updated in the independent mobile service location center function unit, sending an update message to the radio resource control module and notifying the triggering high-precision global positioning assistance data information
  • the system information broadcasts the auxiliary data information to the user equipment through the base station.
  • the GPS auxiliary data can be conveniently obtained, and the process of determining the interface between the external GPS reference network and the external GPS reference network and establishing the transmission link is not required, and there is no need to communicate with the NodeB and other RNCs.
  • the information exchange process is a solution to the non-GPS reference network in the current positioning service application, or the existing GPS reference network cannot quickly apply high-precision AGPS positioning because there is no unified RNC device and its interface.
  • 1 is a flow chart of AGPS positioning of the present invention.
  • FIG. 2 is a schematic diagram of the AGPS positioning of the present invention
  • FIG. 3 is a diagram showing an embodiment of a GPS function unit of the present invention.
  • FIG. 6 is a flow diagram of the auxiliary data acquisition message of the present invention. detailed description
  • the AGPS positioning principle of the ⁇ precision network assisted global positioning system is shown in FIG. 1 , and the GPS function unit in the RNC obtains the auxiliary data information from the satellite broadcast information. , save to SAS.
  • the auxiliary data may be broadcasted through the RRC (Radio Resource Control), or may be sent by the RRC after being obtained from the SAS when the specified UE needs to be located.
  • RRC Radio Resource Control
  • the core idea of the positioning assistance data acquisition method according to the present invention is as follows: According to the AGPS positioning function implementation mechanism: The functional unit SAS (independent SMLC, StandAlone SMLO) inside the RNC is used to store high-precision AGPS positioning assistance data and perform AGPS positioning calculation. . AGPS positioning flow chart 2 is shown. In the AGPS positioning, it is necessary to send information such as ephemeris, almanac, differential GPS (DGPS) of GPS auxiliary data to the mobile terminal, so that the mobile terminal can use the information to quickly determine its position.
  • DGPS differential GPS
  • the method of obtaining the auxiliary data is provided by adding a GPS function unit to the C device.
  • the interface between the SAS function unit and the internal GPS function unit is implemented by the RNC internal custom message. Since it is inside the RNC device, the cumbersome transmission and separate device maintenance can be simplified.
  • the internal GPS function unit first initializes and acquires the basic auxiliary information, that is, the position information of the GPS receiving antenna. When the GPS function unit operates normally, GPS information can be obtained, and the GPS function unit The SAS functional unit sends a message confirming that it has begun to receive the SAS assistance data request message.
  • the information requested by the SAS to the GPS is: three-dimensional position information of the GPS receiver, ephemeris information received by the GPS receiver, almanac information, ionospheric information, UTC (Universal Time Coordinated) parameter information, GPS time information, DGPS information.
  • the RNC broadcasts the updated information to each UE in its lower cell when the satellite broadcast information is updated.
  • the RNC uses the GPS information stored in the internal SAS as auxiliary data and sends it to the UE together with the auxiliary data calculated by itself, so that the UE can quickly capture the GPS.
  • the signal is positioned.
  • the user equipment can calculate the user equipment according to the GPS assistance data provided by the SAS and the location estimation information of the user equipment, and the information received by the user equipment's own GPS receiver. position. If the calculation is performed on the network side, the user equipment uses the GPS assistance data provided by the SAS to perform code phase measurement, and then transmits the code phase measurement result to the SAS, the SAS integrated code phase measurement result and the saved GPS information, and the user equipment estimated position information, using the classic The GPS calculation method can calculate the location of the user equipment.
  • FIG. 1 is a description of the AGPS positioning process on the UTRAN side to facilitate understanding of the application of the auxiliary data acquisition of the method of the present invention in positioning.
  • the RNC When the RNC supports ⁇ precision AGPS positioning, it is required to support the broadcast of the AGPS auxiliary data information.
  • the RNC obtains the auxiliary data for the first time, or when the auxiliary data information changes, the RRC broadcast designation information is triggered by the SAS to all the cells under the RNC. , This is a public process that persists during the normal operation of the RNC.
  • Step 1 The RNC receives a positioning request message LOCATION REPORTING CONTROL message from a CN (please specify the meaning of CN, Chinese and English.), requesting high-precision positioning of the designated UE;
  • Step 2 After the RNC selects the high-precision AGPS positioning, if it is the UE-assisted positioning method, the RRC needs to request the auxiliary data information from the SAS, that is, the code phase acquisition assistance. See the detailed description of 3GPP TS25.331; Step 3: RNC Sending a measurement control message (MEASUREMENT CONTROL) to the UE, requesting it to perform positioning measurement, the UE-based measurement control message does not include auxiliary information, and the UE includes auxiliary information for the auxiliary measurement control message;
  • MASUREMENT CONTROL measurement control message
  • Step 4 The RNC receives the MEASUREMENT REPORT message for the UE.
  • AGPS positioning the content of the successful measurement report is the positioning result of the UE; for the AGPS positioning supplemented by the UE, the content of the successful measurement report is the code phase measurement result;
  • Step 5 When the measurement report result is the code phase measurement result information, the RNC calculates the positioning result of the UE by using the locally saved auxiliary data information together with the measurement result, and if the measurement report result is the positioning result information of the UE, continue One step;
  • Step 6 The RNC sends a LOCATION REPORT message with the positioning result to the CN to end the positioning process.
  • the apparatus is connected to a plurality of base stations, and the base station is wirelessly connected with a plurality of user equipments.
  • the apparatus of the present invention further includes a radio network controller RNC, a GPS functional unit.
  • RNC radio network controller
  • the satellite broadcast information is received in real time.
  • the GPS uses the RNC internal communication mechanism to receive the received satellite broadcast auxiliary information from the GPS, and then transmits and stores it to the SAS function unit.
  • the SAS has the auxiliary data information update
  • the update message is sent to the RRC and the RRC triggers the system information broadcast of the AGPS auxiliary data information, and the auxiliary data information is transmitted to the UE for storage by the NodeB for subsequent high-precision AGPS positioning.
  • the CN sends a positioning request to the RNC, and the RNC performs a positioning control and a management process to select a positioning method for positioning. After finally determining the positioning result, the positioning result is transmitted to the CN by the location report message.
  • the use of AGPS positioning is because when the UE simply uses the GPS receiving device to receive satellite information, the time to first capture the GPS signal may be longer, which makes the response time of the positioning request long, so the principle of mobile positioning AGPS is to use the RNC to transmit AGPS.
  • the auxiliary data information is sent to the UE, thereby shortening the receiving time of the GPS receiving satellite information on the UE, and helping the UE to quickly locate.
  • Fig. 3 is a diagram showing the composition of a GPS function unit of the embodiment.
  • the GPS function unit can receive satellite broadcast information and provide AGPS auxiliary data information to the SAS function unit. As shown in Figure 3, the GPS functional unit consists of two parts and three entities.
  • the GPS application module completes the message conversion between the GPS receiver and the SAS and the management and maintenance of the GPS function unit.
  • the GPS receiving module is responsible for receiving GPS auxiliary information and transmitting the information to the GPS application module. due to
  • GPS technology is mature, so this part can be purchased and used, including the following two parts:
  • GPS antennas and feeders Includes GPS antennas and feeders that transmit signals to the GPS receiver.
  • GPS receiver used to process GPS signals
  • GPS devices and antenna feeders are mature GPS devices.
  • the GPS application (GPSservice) is used to select different GPS devices, that is, the information provided by the GPS receiving module in this embodiment is converted into information required for the RNC device to be saved, so that it is applied when the auxiliary data needs to be sent.
  • Figure 4 illustrates the normal flow of GPS function unit assistance data acquisition. The detailed acquisition process is described in detail in the following steps.
  • Step 1 First initialize the GPS function unit to ensure that the GPS function unit can operate normally;
  • Step 2 The GPS service obtains the geographical location information of the GPS antenna from the GPS receiving module according to the command provided by the GPS receiving device, and stores the information;
  • Step 3 The antenna geographical position information is successfully obtained.
  • the GPS can receive the GPS satellite information normally.
  • the GPSservice sends a GPS status 0K message to the SAS function unit to notify the SAS that it can work normally.
  • Step 4 The GPS service receives the auxiliary data request message of the SAS.
  • the DGPS and a GPS time information it can be specified as a period, and the request message is set to provide a period value.
  • the satellite broadcast ephemeris, almanac information, etc. The method is 'report when information changes'. When the information is modified, the GPSservice reports the modified information to SAS;
  • Step 5 The GPS service can provide information normally, so the auxiliary data response message is sent to the SAS. If the requested information has information such as the GPS geographic location and the current GPS service has obtained, the response message carries such information, if the requested information is currently GPS. Not yet available, the information is not included in the response message;
  • Step 6 The GPS service acquires the auxiliary data according to the content of the SAS request assistance data and the GPS receiving module of the functional unit, and performs the satellite information receiving auxiliary data acquisition process;
  • Step 7 The GPS service obtains the requested auxiliary data, and sends an auxiliary data report message to the SAS; Step 8: The GPS service continues the auxiliary data acquisition process;
  • Step 9 After requesting the auxiliary data to be updated again, the GPSservice sends an auxiliary data report message to
  • Figure 5 describes the auxiliary data acquisition and application of the SAS functional unit.
  • the detailed normal auxiliary data acquisition process is described by the following steps.
  • Step 1 Initialize the SAS functional unit to ensure that it works properly
  • Step 2 The SAS function unit receives the status 0K message of the GPS service, and learns that the GPS can provide the auxiliary data information normally;
  • Step 3 The SAS sends an auxiliary data request message to the GPS service, requesting it to provide satellite broadcast information such as ephemeris, almanac, and DGPS correction, GPS antenna position and the like;
  • Step 4 The SAS receives the assistance data response message of the GPS service to determine whether there is auxiliary data in the message. If not, proceed to step 5; if there is auxiliary data information, the SAS saves the auxiliary data to the local database, and triggers RRC to broadcast the auxiliary data to the UE when the data belongs to the information that needs to be broadcasted; Step 5: The SAS receives the auxiliary data report message of the GPS service, saves the auxiliary data message to the local database, and triggers the system information broadcast to broadcast the auxiliary data information to the UE;
  • Step 6 Continue to wait for the next auxiliary data report, and continue with the processing of step 5.
  • FIG. 6 summarizes the processing message flow diagram of the auxiliary data acquisition between the three functional units of RRC, SAS and GPS, and the detailed description is the same as that of FIG. 4 and FIG.
  • the AGPS assisted data acquisition method can simplify the acquisition process of the GPS auxiliary information, and can perform high-precision AGPS positioning quickly and conveniently without a complicated external GPS reference network.

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  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Mobile Radio Communication Systems (AREA)

Description

一种 WCDMA系统中全球定位辅助数据获取的方法及装置 技术领域
本发明涉及无线网络系统中的移动定位领域, 具体地涉及一种宽带码分多址 (WCDMA, Wideband Code Division Multiple Access) 系统中釆用高精度网络辅助全 球定位系统 (AGPS, Assisted Global Positioning System) 定位方法时辅助数据获取 的方法及装置。 背景技术
无线网络系统中的移动定位业务越来越受到广泛的关注。 移动定位业务主要的应用 包括有:用于用户安全的紧急呼叫定位业务;相关犯罪活动的定位跟踪;个人定位服务, 例如交通、住宿等服务行业信息的查询; 智能交通运输定位; 无线网络系统的设计和资 源管理; 用于无线网络系统的计费, 如根据呼叫率确定某些位置的通信费用。
现在无线网络系统中的定位实现通常有两类: 一类是移动用户通过无线信号的测量 和周围小区基站的信息自主确定地理位置, 即基于用户设备(UE, User Equipment ) 的 情况,一类是由无线网络的网络侧通过无线信号的测量和周围小区的基站信息来最终确 定移动用户的地理位置, 即 UE辅助的情况。
第三代移动通信项目组织(3GPP, The 3rd Generation Partnership Project )对 WCDMA的定位方法描述中沿袭了全球移动通信系统 (GSM, Global System for Mobile Coramuni cations)的定位方法部分内容,并做了一定的改进。 3GPP中对 WCDMA规定的定 位方法有三种: 基于小区标识(Cell Id) 的定位方法; 可能包含网络辅助配置空闲周 期(IPDL, Idle Period of Down Link)的观测到的到达时间差(0TD0A, Observed Time Difference Of Arrived)定位方法; 网络辅助的全球定位系统(AGPS, Assisted Global Positioning System)方法。 - 网络辅助的 GPS定位方法利用对空间卫星信号的测量,需要在地面附加接收设备并 且在移动设备上增加接收器来实现, 根据位置的计算是在 UE侧或是网络侧的不同需要 高层信令参与在无线接口上传输辅助数据来帮助 UE接收卫星信号。 网络辅助的 GPS定 位精度可以达到 5m〜50m, 定位精度较其它定位方法有很大提高, 是目前定位效果最好 的定位方法, 但是需要移动台附加 GPS接收器和无线接口的信息传输。
3GPP协议 25. 305中定义了 AGPS定位方法的基本原理。
现有协议标准对 AGPS 定位方法中辅助数据的获取方法之一是无线网络控制器
- 1 - 确认本 ( Radio Network Controller, 以下简称 RNC)通过 lub和 Iur接口通过与 Node B进行 信息交换信令过程来获得, RNC存储这些 GPS辅助信息来进行 AGPS定位。 现阶段单一 GPS设备的有效覆盖已经可达 1000公里, 而 Node B覆盖远小于这个范围, 而多 Node B 共用一个 GPS实现也较复杂,考虑到 GPS辅助数据存储于 RNC内部独立移动服务定位中 ^ (StandAlone Serving Mobi le Location centre, 以下简称 SAS )功能实体上, 可以 直接在 RNC内部放置 GPS来实现。另外现阶段已经商用的一种辅助数据获取方法是从 C 外部建立 GPS参考网, 通过参考网中 GPS设备获得辅助数据信息, 最后由统一网关接入 WCDMA网络。 建网初期运营商可能选择多家厂商的 WCDMA设备, 如果采用外部 GPS参考 网络, 由于没有统一标准, 而可能使得高精度 AGPS定位实现受到阻碍。 ' 因此, 现有方法还存在缺陷, 而有待于改进和发展。 发明内容
本发明的目的在于提供一种 WCDMA中 AGPS定位辅助数据获取方法及装置, 实现对 高精度 AGPS定位辅助数据的获取, 根据 GPS设备投入较低, 每个 RNC设备覆盖较大的 特点, 本发明方法提供的辅助数据获取方法可大大简化实现难度, 内置的 GPS设备使得 各厂家可以在设备内独立设计, 无需 GPS参考网和 RNC设备之间的接口标准化。
本发明的技术方案如下:
一种 WCDMA系统中全球定位辅助数据获取的方法,所述方法在 WCDMA的无线网络控 制器内置独立移动服务定位中心功能单元时,在 WCDMA网络中的无线网络控制器同时内 置 GPS功能单元; 所述方法还包括:
a)、 所述无线网络控制器内的 GPS功能单元从卫星广播信息中获取辅助数据, 保存 到所述独立移动服务定位中心功能单元上;
b )、 所述辅助数据通过无线资源控制模块发送出去;
c )、所述无线网络控制器内部的独立移动服务定位中心功能单元用于保存高精度定 位辅助数据和进行定位计算。
所述的方法, 其中, 所述步骤 b )还包括: 所述辅助数据通过所述无线资源控制模 块广播发送出去。
所述的方法, 其中, 所述步骤 b )还包括: 在需要对指定用户设备进行定位时, 从 独立移动服务定位中心功能单元获取后通过无线资源控制模块发送出去。
所述的方法, 其中, 所述独立移动服务定位中心功能单元和所述内部 GPS功能单元 同处于所述无线网络控制器内部,两者之间的接口采用无线网络控制器内部自定义消息 来实现。
所述的方法, 其中, 所述无线网络控制器上电后, 首先内部 GPS功能单元进行初始 化和对基本辅助信息的获取过程, 当所述 GPS功能单元运行正常可以获得 GPS信息后, 该 GPS功能单元向所述独立移动服务定位中心功能单元发送消息确认其已经可以开始接 收其辅助数据的请求消息。
所述的方法, 其中, 所述独立移动服务定位中心功能单元向所述 GPS功能单元请求 的信息有: GPS接收器的三维位置信息、 GPS接收器接收到的星历信息、 历书信息、 电 离层信息、 世界协调时间参数信息、 GPS时间信息、 差分 GPS信息。
所述的方法, 其中, 所述无线网络控制器在: E星广播信息有更新时会把这些更新后 的信息广播给其下小区内的各个用户设备, 当无线网络控制器对某一用户设备进行网络 辅助全球定位系统定位需要用到辅助信息时,该无线网络控制器利用其内部独立移动服 务定位中心上保存的 GPS信息作为辅助数据并结合自己计算得到的辅助数据一起发送给 所述用户设备, 以使得该用户设备能够快速捕获 GPS信号进行定位。
所述的方法, 其中, 对于计算在用户设备上进行的定位, 用户设备根据所述独立移 动服务定位中心功能单元提供的 GPS辅助数据和所述用户设备的位置估计信息, 以及所 述用户设备自身 GPS接收器接收到的信息,利用经典 GPS计算方法计算得到所述用户设 备的位置。
所述的方法, 其中, 还包括:
al、如果计算在网络侧进行, 移动台利用独立移动服务定位中心提供的 GPS辅助数 据进行码相位测量;
a2、发送码相位测量结果给所述独 5:移动服务定位中心, 该独立移动服务定位中心 综合码相位测量结果和保存的 GPS信息以及移动台估计位置信息,利用经典 GPS计算方 法计算得到所述移动台的位置。
一种 WCDMA系统中全球定位辅助数据获取的装置, 其通讯连接多个基站, 由基站连 接用户设备, 其中, 所述装置还包括: 一无线网络控制器, 在该无线网络控制器内设置 有- 一内置的 GPS功能单元, 以及一独立移动服务定位中心功能单元, 所述 GPS功能 单元用于实时接收卫星广播信息,利用所述无线控制器内部通信机制传输并存储到所述 独立移动服务定位中心功能单元内;
一无线资源控制模块,在所述独立移动服务定位中心功能单元内有辅助数据信息更 新时,把更新消息发送给该无线资源控制模块并通知触发高精度全球定位辅助数据信息 的系统信息广播, 通过基站把辅助数据信息传给用户设备。
采用本发明所述方法及装置, 可以方便的获取 GPS辅助数据, 无需外部 GPS参考网 络和与外部 GPS参考网络之间的接口确定和传输链路建立等过程,无需与 NodeB和其他 RNC之间的信息交换过程;是对现阶段定位业务应用中无 GPS参考网络,或者已有的 GPS 参考网络因为没有统一的 RNC设备与其的接口, 而不能快速应用高精度 AGPS定位的一 种解决方法。 附图说明
图 1是本发明的 AGPS定位流程图 ·,
图 2是本发明的 AGPS定位原理图;
图 3是本发明的 GPS功能单元的一种实施例图;
图 4是本发明的 GPS功能单元辅助数据获取流程图;
图 5是本发明的 SAS功能单元辅助数据获取和应用流程图;
图 6是本发明的辅助数据获取消息流图。 具体实施方式
下面结合附图对本发明提供的高精度移动定位辅助数据获取方法的一种实施例做 详细说明。
本发明所述 WCDMA系统中全球定位辅助数据获取的方法及装置中, 采用髙精度网络 辅助全球定位系统 AGPS定位原理如图 1所示, RNC内 GPS功能单元从卫星广播信息中获 取辅助数据信息后, 保存到 SAS上。 辅助数据可以通过无线资源控制模块(RRC, Radio Resource Control )广播发送出去, 也可以是在需要对指定 UE进行定位时, 从 SAS获 取后, 通过 RRC发送出去。
本发明所述的定位辅助数据获取方法的核心思想如下: 根据 AGPS定位功能实现机 制: RNC内部的功能单元 SAS (独立的 SMLC, StandAlone SMLO)用于保存高精度 AGPS 定位辅助数据和进行 AGPS定位计算。 AGPS定位流程图 2所示。在 AGPS定位中需要发送 GPS辅助数据的星历、 历书、 差分 GPS (DGPS, Differential GPS)等信息给移动终端, 使得移动终端可以利用这些信息快速确定自身位置。
辅助数据的获取方法是在 C设备内增加 GPS功能单元来提供。 SAS功能单元和内 部 GPS功能单元之间的接口采用 RNC内部自定义消息来实现,由于同处于 RNC设备内部, 所以可以简化传输和分开设备维护的繁琐。 如图 4所示, RNC上电后, 首先内部 GPS功能单元进行初始化和对基本辅助信息即 GPS接收天线的位置信息的获取过程, 当 GPS功能单元运行正常可以获得 GPS信息后, GPS功能单元向 SAS功能单元发送消息确认其已经可以开始接收 SAS的辅助数据请求消 息。
SAS向 GPS请求的信息有: GPS接收器的三维位置信息、 GPS接收器接收到的星历信 息、 历书信息、 电离层信息、 世界协调时间 (UTC, Universal Time Coordinated) 参 数信息、 GPS时间信息、 DGPS信息。
RNC在卫星广播信息有更新时会把这些更新后的信息广播给其下小区内的各个 UE。 当 RNC对某一 UE进行高精度 AGPS定位需要用到辅助信息时, RNC利用内部 SAS上保存 的 GPS信息作为辅助数据并结合自己计算得到的辅助数据一起发送给 UE, 以使得 UE能 够快速捕获 GPS信号进行定位。
对于计算在用户设备上进行的定位,用户设备根据 SAS提供的 GPS辅助数据和用户 设备的位置估计信息, 以及用户设备自身 GPS接收器接收到的信息, 利用经典 GPS计算 方法可以计算得到用户设备的位置。如果计算在网络侧进行, 用户设备利用 SAS提供的 GPS辅助数据进行码相位测量,然后发送码相位测量结果给 SAS, SAS综合码相位测量结 果和保存的 GPS信息以及用户设备估计位置信息,利用经典 GPS计算方法可以计算得到 用户设备的位置。
如图 1所示为对 UTRAN侧 AGPS定位流程做一描述, 以方便理解本发明方法的辅助 数据获取在定位中的应用。
当 RNC支持髙精度 AGPS定位时, 需要支持 AGPS辅助数据信息的广播, 当 RNC首次 获得辅助数据时, 或者是当辅助数据信息有变化时, 通过 SAS触发 RRC广播指定信息给 该 RNC下的所有小区, 这是一个公共过程, 在 RNC正常运行过程中一直存在。
对于某一指定 UE定位过程来说, 由下面几个步骤来描述:
步骤一: RNC接收到来自 CN (请说明 CN的意义, 中英文。) 的对某一 UE的定位 请求消息 LOCATION REPORTING CONTROL消息, 请求对指定 UE进行高精度定位;
步骤二: RNC选定了采用高精度 AGPS定位后, 如果是 UE辅助的定位方法, 需要 RRC从 SAS请求辅助数据信息, 即码相位捕获辅助, 参见 3GPP TS25. 331的详细描述; 步骤三: RNC向 UE发送测量控制消息(MEASUREMENT CONTROL), 请求其进行定位 测量, UE为主的测量控制消息不包含辅助信息, UE为辅助的 测量控制消息包含辅助信 息;
步骤四: RNC收到 UE的测量报告 (MEASUREMENT REPORT)消息, 对于 UE为主的 AGPS定位, 成功的测量报告内容就是 UE的定位结果; 对于 UE为辅的 AGPS定位, 成功 的测量报告内容是码相位测量结果;
步骤五: 当测量报告结果是码相位测量结果信息时, RNC利用本地保存的辅助 ¾ 据信息和该测量结果一起计算得到 UE的定位结果,如果测量报告结果就是 UE的定位结 果信息, 则继续下一步骤;
步骤六: RNC发送带有定位结果的 LOCATION REPORT消息给 CN, 结束本次定位过 程。
图 2是本发明的 AGPS定位装置的结构图, 所述装置通讯连接多个基站, 由基站分 别无线连接有多个用户设备, 本发明所述装置还包括一无线网络控制器 RNC, GPS功能 单元内置于该 RNC设备内, 实时接收卫星广播信息, GPS利用 RNC内部通信机制把接收 到的卫星广播辅助信息由 GPS接收到后, 传输并存储到 SAS功能单元内。 SAS有辅助数 据信息更新时把更新消息发送给 RRC并通知 RRC触发 AGPS辅助数据信息的系统信息广 播, 通过 NodeB把辅助数据信息传给 UE保存, 以用于后续高精度 AGPS定位。
CN发送定位请求给 RNC, RNC执行定位控制和管理过程选择定位方法进行定位, 最 终确定定位结果后, 把定位结果以位置报告消息传递给 CN。
采用 AGPS定位是由于 UE单纯采用 GPS接收设备接收卫星信息时,初次捕获 GPS信 号的时间可能会较长, 这就使得定位请求的响应时间会很长, 所以移动定位 AGPS的原 理就是利用 RNC传送 AGPS辅助数据信息给 UE,由此缩短 UE上 GPS接收卫星信息的接收 时间, 帮助 UE快速定位。
图 3是本实施例的一种 GPS功能单元的组成图。
GPS功能单元可以接收卫星广播信息,提供 AGPS辅助数据信息给 SAS功能单元。如 图 3所示, GPS功能单元由两部分三个实体组成. -
GPS应用程序模块, GPS功能单元上非 GPS接收模块的部分,完成 GPS接收机和 SAS 之间的消息转换和 GPS功能单元的管理维护等功能。
GPS接收模块, 负责接收 GPS辅助信息并传送这些信息给 GPS应用程序模块。 由于
GPS技术成熟, 所以这部分可以购买使用, 包括以下两个部分:
GPS天线和馈线: 包括 GPS天线和传输信号到 GPS接收机的馈线两部分。
GPS接收机: 用于对 GPS信号进行处理
如图 3所示 GPS设备和天线馈线等都是成熟的 GPS设备。 GPS应用程序 (GPSservice) 用于选用不同 GPS设备, 即本实施例中的 GPS接收模块提供的信息转换为 RNC设备需要 的信息保存, 以便于需要发送辅助数据时应用。 图 4对 GPS功能单元辅助数据获取的正常流程做了描述。详细的获取过程由如下几 个步骤详细描述。
步骤一: 首先初始化 GPS功能单元, 确保 GPS功能单元可以正常运行; 步骤二: GPSservice按照 GPS接收设备提供的命令从 GPS接受模块获取 GPS天线 的地理位置信息, 并存储该信息;
步骤三: 天线地理位置信息成功获取说明 GPS已经可以正常接收 GPS卫星信息, 此时 GPSservice向 SAS功能单元发送 GPS状态 0K消息,通知 SAS自己已经可以正常工 作;
步骤四: GPSservice收到 SAS的辅助数据请求消息, 对于 DGPS和一 GPS时间信 息, 可以指定为周期提供, 请求消息中设定提供周期取值; 对于卫星广播的星历、 历书 信息等设定报告方式为 '信息变化时报告', 当信息有修改, GPSservice报告修改后信 息给 SAS ;
步骤五: GPSservice可以正常提供信息, 所以发送辅助数据响应消息给 SAS, 如 果请求的信息有 GPS地理位置等当前 GPSservice已经获得的信息, 则响应消息中带有 此类信息, 如果请求的信息当前 GPS尚未得到, 则响应消息中不包括这些信息;
步骤六: GPSservice按照 SAS请求辅助数据的消息中内容和本功能单元的 GPS 接收模块交互来获取辅助数据, 执行卫星信息接收辅助数据获取过程;
步骤七: GPSservice获得了请求的辅助数据, 发送辅助数据报告消息给 SAS ; 步骤八: GPSservice继续辅助数据获取过程;
步骤九: 请求辅助数据再次更新得到后, GPSservice发送辅助数据报告消息给
SAS; 然后继续步骤八的过程。
图 5对 SAS功能单元的辅助数据获取和应用做了描述,详细的正常辅助数据获取流 程由下面几个步骤来描述。
步骤一: 初始化 SAS功能单元, 确保其可以正常工作;
步骤二: SAS功能单元收到 GPSservice的状态 0K消息, 获知 GPS已经可以正常 提供辅助数据信息;
步骤三: SAS发送辅助数据请求消息给 GPSservice, 请求其提供星历、历书等卫 星广播信息和 DGPS修正、 GPS天线位置等信息;
' 步骤四: SAS收到 GPSservice的辅助数据响应消息,判断消息中是否有辅助数据 存在。 如果没有则继续步骤五; 如果有辅助数据信息, 则 SAS保存辅助数据到本地数据 库, 并当该数据属于需要广播的信息时触发 RRC广播该辅助数据给 UE; 步骤五: SAS收到 GPSservice的辅助数据报告消息,保存辅助数据消息到本地数 据库, 并触发系统信息广播以广播辅助数据信息给 UE;
步骤六: 继续等待下一次的辅助数据报告, 继续步骤五的处理。
图 6对 RRC、 SAS和 GPS三个功能单元之间的辅助数据获取的处理消息流图做了综 述, 具体描述与对图 4和图 5的描述相同。
通过上述描述可见, 采用本发明所述的 AGPS辅助数据获取方法可以简化 GPS辅助 信息的获取过程, 无需复杂的外部 GPS参考网络, 可以快速方便的进行高精度 AGPS定 位。
但应当理解的是, 本发明上述针对具体实施例的描述较为具体, 并不能因此而理解 为对本发明专利保护范围的限制, 本发明的专利保护范围应以所附权利要求为准。

Claims

权利要求
1、 一种 WCDMA系统中全球定位辅助数据获取的方法,所述方法在 WCDMA的无线 网络控制器内置独立移动服务定位中心功能单元时,在 WCDMA网络中的无线网络控制器 同时内置 GPS功能单元; 所述方法还包括- a)、 所述无线网络控制器内的 GPS功能单元从卫星广播信息中获取辅助数据, 保存 到所述独立移动服务定位中心功能单元上;
b)、 所述辅助数据通过无线资源控制模块发送出去;
c )、所述无线网络控制器内部的独立移动服务定位中心功能单元用于保存高精度定 位辅助数据和进行定位计算。
2、 根据权利要求 1所述的方法, 其特征在于, 所述步骤 b)还包括: 所述辅助 数据通过所述无线资源控制模块广播发送出去。
3 " 根据权利要求 1所述的方法, 其特征在于, 所述步骤 b )还包括: 在需要对 指定用户设备进行定位时,从独立移动服务定位中心功能单元获取后通过无线资源控制 模块发送出去。
4、 根据权利要求 1所述的方法,其特征在于,所述独立移动服务定位中心功能 单元和所述内部 GPS功能单元同处于所述无线网络控制器内部,两者之间的接口采用无 线网络控制器内部自定义消息来实现。
5、 根据权利要求 4所述的方法,其特征在于,所述无线网络控制器上电后,首 先内部 GPS功能单元进行初始化和对基本辅助信息的获取过程,当所述 GPS功能单元运 行正常可以获得 GPS信息后,该 GPS功能单元向所述独立移动服务定位中心功能单元发 送消息确认其已经可以开始接收其辅助数据的请求消息。
6、 根据权利要求 5所述的方法,其特征在于,所述独立移动服务定位中心功能 单元向所述 GPS功能单元请求的信息有: GPS接收器的三维位置信息、 GPS接收器接收 到的星历信息、 历书信息、 电离层信息、 世界协调时间参数信息、 GPS时间信息、 差分 GPS信息。
7、 根据权利要求 4所述的方法,其特征在于,所述无线网络控制器在卫星广播 信息有更新时会把这些更新后的信息广播给其下小区内的各个用户设备,当无线网络控 制器对某一用户设备进行网络辅助全球定位系统定位需要用到辅助信息时,该无线网络 控制器利用其内部独立移动服务定位中心上保存的 GPS信息作为辅助数据并结合自己计 算得到的辅助数据一起发送给所述用户设备, 以使得该用户设备能够快速捕获 GPS信号 进行定位。
8、 根据权利要求 4所述的方法,其特征在于,对于计算在用户设备上进行的定 位,用户设备根据所述独立移动服务定位中心功能单元提供的 GPS辅助数据和所述用户 设备的位置估计信息, 以及所述用户设备自身 GPS接收器接收到的信息, 利用经典 GPS 计算方法计算得到所述用户设备的位置。
9、 根据权利要求 8所述的方法, 其特征在于, 所述方法还包括- al、如果计算在网络侧进行, 移动台利用独立移动服务定位中心提供的 GPS辅助数 据进行码相位测量;
a2、发送码相位测量结果给所述独立移动服务定位中心, 该独立移动服务定位中心 综合码相位测量结果和保存的 GPS信息以及移动台估计位置信息,利用现有 GPS计算方 法计算得到所述移动台的位置。
10、 一种 WCDMA系统中全球定位辅助数据获取的装置,其通讯连接多个基站, 由 基站连接用户设备, 其特征在于, 所述装置还包括: 一无线网络控制器, 在该无线网络 控制器内设置有:
一内置的 GPS功能单元, 以及一独立移动服务定位中心功能单元, 所述 GPS功能 单元用于实时接收卫星广播信息,利用所述无线控制器内部通信机制传输并存储到所述 独立移动服务定位中心功能单元内;
一无线资源控制模块,在所述独立移动服务定位中心功能单元内有辅助数据信息更 新时,把更新消息发送给该无线资源控制模块并通知触发髙精度全球定位辅助数据信息 的系统信息广播, 通过基站把辅助数据信息传给用户设备。
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