WO2010130134A1 - Lte系统中实现定位的方法及系统 - Google Patents

Lte系统中实现定位的方法及系统 Download PDF

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Publication number
WO2010130134A1
WO2010130134A1 PCT/CN2009/075613 CN2009075613W WO2010130134A1 WO 2010130134 A1 WO2010130134 A1 WO 2010130134A1 CN 2009075613 W CN2009075613 W CN 2009075613W WO 2010130134 A1 WO2010130134 A1 WO 2010130134A1
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Prior art keywords
assistance data
positioning
gps
positioning assistance
otdoa
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PCT/CN2009/075613
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English (en)
French (fr)
Inventor
黄波
吴昊
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中兴通讯股份有限公司
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Publication of WO2010130134A1 publication Critical patent/WO2010130134A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information
    • H04W4/029Location-based management or tracking services
    • 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
    • G01S5/00Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/0205Details
    • G01S5/0236Assistance data, e.g. base station almanac
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02Services making use of location information

Definitions

  • the present invention relates to a positioning technology, and more particularly to a method and system for implementing positioning in a Long Term Evolution (LTE) system.
  • LTE Long Term Evolution
  • 3GPP 3rd Generation Partnership Project
  • E-UTRA evolved access technology
  • E-UTRAN evolved access network
  • SAE All-IP Packet Domain Core Network Evolution
  • LTE is a technology based on Orthogonal Frequency Division Multiplexing (OFDM) and Single Carrier-Frequency Division Multiple Access (SC-FDMA).
  • the main performance objectives of the 3GPP LTE project include: It can provide downlink 100Mbps and uplink 50Mbps peak rate in 20MHz spectrum bandwidth; Improve cell edge user performance; Increase cell capacity; Reduce system delay, user plane internal one-way transmission delay is less than 5ms
  • the control plane migrates from sleep state to active state for less than 50ms, and the migration time from the resident state to the active state is less than 100ms; the cell coverage supporting lOOKm radius; capable of providing >100kbps access service for 350Km/h high-speed mobile users Supports paired or unpaired spectrum and flexible configuration of multiple bandwidths from 1.25 MHz to 20 MHz.
  • LCS Location Services
  • LCS uses wireless positioning technology to obtain mobile station location information such as latitude and longitude, Mobile speed, etc., and provided to mobile users, mobile communication networks or other external entities to implement various location-related services.
  • mobile users can easily find out where they are currently, and query or search for information about nearby places. They can also locate specific users or organizations, monitor and track real-time based on the user's location, and combine electronic maps. , to achieve monitoring and scheduling.
  • the main purpose of the present invention is to provide a method and system for implementing positioning in an LTE system, which can provide an implementation solution of the LCS in the LTE system, and ensure the practical application of the LCS service in the LTE system.
  • a method for implementing positioning in a long term evolution LTE system comprising:
  • the user terminal UE obtains positioning assistance data according to the LCS system information block broadcasted by the network side, and performs positioning by using the obtained positioning assistance data.
  • the LCS system information block is a system information block 12 SIB12 added in the system information SI message.
  • the obtaining, by the UE, the positioning assistance data according to the LCS system information block broadcasted by the network side specifically includes:
  • the UE When receiving the broadcast message, the UE reads the SIB1 in the downlink shared channel, and obtains the scheduling information of the LCS system information block through the SIB1;
  • the UE reads the SIB 12 based on the obtained scheduling information, and acquires positioning assistance data from the SIB 12.
  • the SIB12 carries a value tag corresponding to different positioning modes for indicating whether there is updated positioning assistance data.
  • And positioning assistance data based on observable arrival time difference OTDOA, and/or based on full
  • the ball positioning system GPS-based positioning assistance data, and/or GPS-based positioning assistance data.
  • the value tag includes:
  • the positioning assistance data based on the observable time difference of arrival OTDOA includes:
  • OTDOA encrypted information and/or auxiliary data for UE assisted OTDOA positioning, and/or auxiliary data for UE-based OTDOA positioning.
  • the GPS-based universal positioning assistance data based on the global positioning system includes: GPS data encryption information, reference position, GPS reference time, and anomalous satellite ID.
  • the GPS-based positioning assistance data includes: a satellite ID, and,
  • the obtaining the positioning assistance data from the SIB12 includes:
  • the UE If the UE does not save a value tag indicating whether the OTDOA class positioning assistance data is changed, or a value tag read from the SIB 12 indicating whether the OTDOA class positioning assistance data is changed is different from a value held by the UE itself, then The UE saves a value tag indicating whether the OTDOA-type positioning assistance data is changed, the UE reads the OTDOA encryption information, and the auxiliary data of the UE-assisted OTDOA positioning as the positioning assistance data; if the UE supports the UE-based positioning, the UE further reads the UE-based OTDOA positioning. Auxiliary data as positioning aid data;
  • the UE If the UE does not save a value tag for indicating whether the GPS-type universal positioning assistance data is changed, or a value tag read from the SIB 12 for indicating whether the GPS-type general-purpose positioning assistance data is changed is different from a value saved by the UE itself, Then, the UE saves a value tag indicating whether the GPS-type universal positioning assistance data is changed, and the UE reads the GPS data encryption information, the reference position, GPS reference time and abnormal satellite ID as positioning assistance data;
  • the UE If the UE does not hold a value tag and a satellite ID for indicating whether the GPS-type positioning assistance data is changed, or at least one of a value tag and a satellite ID read from the SIB 12 for indicating whether the GPS-type positioning assistance data is changed or not Different from the values saved by the UE itself, the UE saves a value tag and a satellite ID for indicating whether the GPS-type positioning assistance data is changed, and the UE reads the differential GPS information, the satellite's week time, the GPS ephemeris, and the time correction coefficient. And GPS navigation parameter information as positioning assistance data.
  • a system for realizing positioning in a long-term evolution LTE system where the system includes a network side and a user side, where
  • the network side is configured to set an LCS system information block and broadcast an LCS system information block.
  • the user side is configured to receive a broadcast message, obtain positioning assistance data according to the broadcasted LCS system information block, and perform positioning by using the obtained positioning assistance data.
  • the user terminal acquires the positioning assistance data according to the LCS system information block broadcasted by the network side, and completes the positioning according to the latest positioning assistance data.
  • the method of the invention provides an implementation scheme of the LCS in the LTE system, which ensures the practical application of the LCS service in the LTE system.
  • the LCS system information block is sent by broadcast, which reduces the system load.
  • FIG. 1 is a flowchart of a method for implementing positioning in an LTE system according to the present invention
  • FIG. 2 is a flowchart of an embodiment of acquiring positioning assistance data according to the present invention
  • FIG. 3 is a schematic structural diagram of a system for implementing positioning in an LTE system according to the present invention.
  • the method includes: Step 100: The UE acquires positioning assistance data according to the LCS system information block broadcasted by the network side.
  • the system information block 12 SIB12, SystemInformationBlockTypel2
  • SIB12 SystemInformationBlockTypel2
  • the scheduling information of the SIB12 is carried by the scheduling information unit of the SIB1, and the scheduling information of the SIB12 is used to indicate when the SIB12 is transmitted, such as the start time.
  • the positioning assistance data carried in the SIB12 is shown in Table 2.
  • the tag combined with the satellite ID, determines if the LCS has changed.
  • DGPS optional Differential GPS
  • GPS Ephemeris and Clock Optional GPS ephemeris and time correction factor GPS Ephemeris and Clock Optional GPS ephemeris and time correction factor.
  • GPS navigation Parameters such as: ionospheric parameters, perpetual calendar and satellite health index, UTC, UFO, satellite mask, TOW minimum effective bit, etc.
  • the SIB12 carries positioning assistance data based on the Observed Time Difference Of Arrival (OTDOA) and Global Positioning Systems (GPS) positioning methods. If there are other positioning methods, you only need to add related information elements to SIB12. If there is only one positioning method, you only need to set the relevant information elements corresponding to the positioning method in SIB12.
  • OTDOA Observed Time Difference Of Arrival
  • GPS Global Positioning Systems
  • Value tags ValueTag ie, valuetagofOTDOA, ValuetagofCommonGPS, and ValuetagofGPS, which are used to indicate whether there is updated positioning assistance data, are used in the SIB12 to facilitate the UE to identify whether there is an update of the positioning assistance data.
  • FIG. 2 is a flowchart of an embodiment of acquiring positioning assistance data according to the present invention.
  • a UE having an LCS capability when receiving a broadcast message, a UE having an LCS capability reads SIB1 in a downlink shared channel, and uses a scheduling information element in SIB1.
  • the LCS system information block acquires scheduling information such as the start time, the UE reads the SIB 12 according to the scheduling information, thereby acquiring the positioning assistance data.
  • obtaining positioning assistance data include:
  • the LCS-capable UE After receiving the broadcast message, the LCS-capable UE reads according to the scheduling information block in SIB1. Take the LCS system information block SIB12:
  • the UE saves the valuetagofOTDOA and reads the OTDOA ciphering info, UE-assisted
  • the OTDOA assistance data information is used as the positioning assistance data; if the UE supports the UE-based positioning, the UE-based OTDOA assistance data information needs to be read as the positioning assistance data;
  • the UE If the UE does not save the ValuetagofCommonGPS, or the ValuetagofCommonGPS read from the SIB12 is different from the value saved by the UE itself, it indicates that the GPS general system information has been updated. At this time, the UE saves the ValuetagofCommonGPS, and the UE reads the Common GPS data such as: GPS data encryption. Information, reference location, GPS reference time, anomalous satellite ID, etc., as positioning assistance data.
  • the UE If the UE does not save ValuetagofGPS and SatlD, or one or two of ValuetagofGPS and SatlD read from SIB12 are different from the values saved by the UE itself, indicating that the GPS auxiliary information has been updated, the UE saves ValuetagofGPS and SatlD, and It is necessary to read DGPS, Transmission TOW, GPS Ephemeris and Clock Correction Parameters and GPS navigation parameter information as positioning assistance data.
  • the LCS-capable UE reads the SIB12, the valuetagofOTDOA, ValuetagofCommonGPS, ValuetagofGPS, and SatlD values are the same as the corresponding values saved by the UE itself, indicating that the auxiliary positioning data is not updated, and the UE does not further read the SIB12 message.
  • Step 101 Perform positioning using the obtained positioning assistance data.
  • the obtained positioning assistance data is used to locate the user.
  • Positioning method in this step One or more existing positioning methods may be employed, and the positioning method herein does not limit the application of the method of the present invention. Determining the user location primarily includes wireless signal measurements and measurement based position estimation calculations.
  • the signal measurement can be performed in the user terminal, the base station, and the positioning measurement unit, and the location estimation calculation can be performed in the user terminal or the radio access network.
  • some auxiliary information is needed to assist in the positioning process, such as: ephemeris, satellite correction data, encryption information, etc. during satellite positioning.
  • the system message is sent to the UE in the form of a cell broadcast.
  • the LCS system message SIB12 is added for transmitting positioning assistance data.
  • FIG. 3 is a schematic structural diagram of a system for implementing positioning in an LTE system according to the present invention. As shown in FIG. 3, the system includes a network side and a user side, where
  • the network side is used to set the LCS system information block and broadcast the LCS system information block.
  • the user side is configured to receive a broadcast message, obtain positioning assistance data according to the broadcasted LCS system information block, and perform positioning by using the obtained positioning assistance data.
  • the user side is a terminal with/without LCS capability.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)

Description

LTE系统中实现定位的方法及系统 技术领域
本发明涉及定位技术, 尤指一种长期演进( LTE, Long Term Evolution ) 系统中实现定位的方法及系统。 背景技术
目前移动通信技术面临着为用户提供更高的数据速率、 为网络提供更 好的覆盖和更大的容量的问题。 为了解决上述问题, 第三代合作伙伴计划 ( 3GPP, 3rd Generation Partnership Project ) 启动了无线接入网 LTE项目、 演进的接入技术(E-UTRA ) 、 演进的接入网络(E-UTRAN ) , 以及面向 全 IP的分组域核心网演进( SAE )项目, 希望通过从无线接口到核心网络 的持续演进和增强, 为运营商和用户不断增长的需求提供更好的支持。
LTE 是一种以正交频分复用技术 ( OFDM , Orthogonal Frequency Division Multiplexing ) /单载波频分复用技术( SC-FDMA, Single Carrier- Frequency Division Multiple Access ) 为核心的技术。 3GPP LTE项目的主要 性能目标包括: 在 20MHz频谱带宽能够提供下行 100Mbps、 上行 50Mbps 的峰值速率; 改善小区边缘用户的性能; 提高小区容量; 降低系统延迟, 用户平面内部单向传输时延低于 5ms , 控制平面从睡眠状态到激活状态迁 移时间低于 50ms , 从驻留状态到激活状态的迁移时间小于 100ms; 支持 lOOKm半径的小区覆盖;能够为 350Km/h高速移动用户提供 >100kbps的接 入服务; 支持成对或非成对频谱, 并可灵活配置 1.25 MHz到 20MHz多种 带宽。
定位业务(LCS, Location Services )是移动通信网所提供的一种新型 的增值业务。 LCS 通过无线定位技术来获得移动台的位置信息如经纬度、 移动速度等, 并提供给移动用户、 移动通讯网络或者其它外部实体, 以实 现各种与位置相关的业务。 使用 LCS, 移动用户可以方便地获知自己目前 所处的位置, 并查询或搜索附近各种场所的信息; 还可以对特定用户或组 织进行定位, 根据用户的位置进行实时监测、 跟踪, 结合电子地图, 实现 监控与调度。
但是, 在 LTE 系统中, 目前没有涉及 LCS 的具体实现方案, 从而给 LCS业务在 LTE系统中的实际应用带来了不便。 发明内容
有鉴于此, 本发明的主要目的在于提供一种 LTE系统中实现定位的方 法及系统, 能够提供 LTE系统中的 LCS的实现方案,保证 LCS业务在 LTE 系统中的实际应用。
为达到上述目的, 本发明的技术方案是这样实现的:
一种长期演进 LTE系统中实现定位的方法, 该方法包括:
用户终端 UE根据网络侧广播的 LCS系统信息块获取定位辅助数据, 并利用获得的定位辅助数据进行定位。
所述 LCS 系统信息块为系统信息 SI 消息中增加的系统信息块 12 SIB12。
所述 UE根据网络侧广播的 LCS系统信息块获取定位辅助数据具体包 括:
所述 UE收到广播消息时, 在下行共享信道中读取 SIB1 , 通过 SIB1获 取 LCS系统信息块的调度信息;
UE根据获得的调度信息读取 SIB12,并从 SIB12中获取定位辅助数据。 所述 SIB12 中携带有对应不同定位方式的、 用于表示是否存在更新的 定位辅助数据的值标签,
以及基于可观察的到达时间差 OTDOA的定位辅助数据, 和 /或基于全 球定位系统 GPS类通用的定位辅助数据, 和 /或基于 GPS类的定位辅助数 据。
所述值标签包括:
用于表示 OTDOA类定位辅助数据是否改变的值标签;
和 /或用于表示 GPS类通用定位辅助数据是否改变的值标签; 和 /或用于表示 GPS类定位辅助数据是否改变的值标签。
所述基于可观察的到达时间差 OTDOA的定位辅助数据包括:
OTDOA加密信息, 和 /或 UE辅助 OTDOA定位的辅助数据, 和 /或基 于 UE的 OTDOA定位的辅助数据。
所述基于全球定位系统 GPS类通用定位辅助数据包括: GPS数据加密 信息、 参考位置、 GPS参考时间、 异常卫星 ID。
所述基于 GPS类的定位辅助数据包括: 卫星 ID, 以及,
差分 GPS信息, 和 /或卫星的星期时间, 和 /或 GPS星历和时间修正系 数, 和 /或 GPS导航参数。
所述从 SIB12中获取定位辅助数据包括:
如果所述 UE没有保存用于表示 OTDOA类定位辅助数据是否改变的值 标签, 或者从 SIB12中读取的用于表示 OTDOA类定位辅助数据是否改变 的值标签与 UE自身保存有的值不同,则 UE保存表示 OTDOA类定位辅助 数据是否改变的值标签, UE读取 OTDOA加密信息、 UE辅助 OTDOA定 位的辅助数据作为定位辅助数据; 如果 UE支持基于 UE的定位, UE进一 步读取基于 UE的 OTDOA定位的辅助数据作为定位辅助数据;
如果所述 UE没有保存用于表示 GPS类通用定位辅助数据是否改变的 值标签, 或者从 SIB12中读取的用于表示 GPS类通用定位辅助数据是否改 变的值标签与 UE 自身保存的值不同, 则 UE保存用于表示 GPS类通用定 位辅助数据是否改变的值标签, UE读取 GPS数据加密信息、 参考位置、 GPS参考时间、 异常卫星 ID作为定位辅助数据;
如果所述 UE没有保存用于表示 GPS类定位辅助数据是否改变的值标 签和卫星 ID,或者从 SIB12中读取的用于表示 GPS类定位辅助数据是否改 变的值标签和卫星 ID中存在至少一个与 UE自身保存的这两者值不同, 则 UE保存用于表示 GPS类定位辅助数据是否改变的值标签和卫星 ID, UE读 取差分 GPS信息、卫星的星期时间、 GPS星历和时间修正系数和 GPS导航 参数信息作为定位辅助数据。
一种长期演进 LTE系统中实现定位的系统, 该系统包括网络侧和用户 侧, 其中,
网络侧, 用于设置 LCS系统信息块, 并广播 LCS系统信息块; 用户侧, 用于接收广播消息, 根据广播的 LCS系统信息块获取定位辅 助数据, 利用获得的定位辅助数据进行定位。
从上述本发明提供的技术方案可以看出, 用户终端 (UE )根据网络侧 广播的 LCS系统信息块获取定位辅助数据, 并按照最新的定位辅助数据完 成定位。 本发明方法提供了 LTE系统中的 LCS的实现方案, 保证了 LCS 业务在 LTE系统中的实际应用。 同时, 将 LCS系统信息块通过广播的方式 下发, 减轻了系统负荷。 附图说明
图 1为本发明 LTE系统中实现定位的方法的流程图;
图 2为本发明获取定位辅助数据的实施例的流程图;
图 3为本发明 LTE系统中实现定位的系统的组成结构示意图。 具体实施方式 图 1为本发明 LTE系统中实现定位的方法的流程图, 如图 1所示, 包 括: 步骤 100: UE根据网络侧广播的 LCS系统信息块获取定位辅助数据。 在网络侧的系统信息( SI , Systemlnformation )消息中, 增加系统信息 块 12 ( SIB12, SystemInformationBlockTypel2 )作为 LCS系统信息块, 用 于携带定位辅助数据。 SIB12 的调度信息由 SIB1 的调度信息单元携带, SIB12的调度信息用于指示 SIB12何时传输, 比如开始时间等。
是本发明在 SI消息中新增的 SIB12的消息格式。
Figure imgf000007_0002
Figure imgf000007_0001
在 SIB12中携带的定位辅助数据如表二所示。
Figure imgf000007_0003
标签, 与卫星 ID结合, 判断 LCS是 否改变。
SatID 必选 卫星 ID。
DGPS 可选 差分 GPS ( DGPS )信息。
Transmission TOW 可选 卫星的星期时间。
GPS Ephemeris and Clock 可选 GPS星历和时间修正系数。
Correction Parameters
GPS navigation Parameters 可选 GPS导航参数, 如: 电离层参数、 万年历及卫星健康指数、世界协调时 间 UTC、 卫星 Mask、 TOW的最低 有效位等。
Figure imgf000008_0001
如表二所示, SIB12 中携带有基于可观察的到达时间差 (OTDOA, Observed Time Difference Of Arrival ) 和全球定位系统 (GPS , Global Positioning Systems )定位方式的定位辅助数据。 如果还有其他定位方式, 只需在 SIB12 中增加相关信息元素即可; 如果只有一种定位方式, 那只需 在 SIB12中设置对应该定位方式的相关信息元素即可。
在 SIB12 中利用用于表示是否存在更新的定位辅助数据的值标签 ValueTag即 valuetagofOTDOA、 ValuetagofCommonGPS和 ValuetagofGPS, 便于 UE识别是否存在定位辅助数据的更新。
图 2为本发明获取定位辅助数据的实施例的流程图, 如图 2所示, 具备 LCS能力的 UE收到广播消息时, 在下行共享信道中读取 SIB1 , 通过 SIB1中的调度信息单元,获取 LCS系统信息块何时传输如开始时间的 调度信息, UE根据该调度信息读取 SIB12, 从而获取定位辅助数据。
获取定位辅助数据的具体实现包括:
具备 LCS能力的 UE收到广播消息后, 按照 SIB1中的调度信息块,读 取 LCS系统信息块 SIB12:
如果 UE 没有保存 valuetagofOTDOA , 或者从 SIB12 中读取的 valuetagofOTDOA与 UE自身保存有的值不同,表明 OTDOA相关的系统信 息发生了更新,此时, UE保存 valuetagofOTDOA,并读取 OTDOA ciphering info, UE-assisted OTDOA assistance data信息作为定位辅助数据; 如果 UE 支持基于 UE的定位, 此时还需要读取 UE-based OTDOA assistance data 信息作为定位辅助数据;
如果 UE 没有保存 ValuetagofCommonGPS, 或者从 SIB12 中读取的 ValuetagofCommonGPS与 UE自身保存的值不同, 表明 GPS通用系统信息 发生了更新, 此时, UE保存 ValuetagofCommonGPS, 并 UE读取 Common GPS data如: GPS数据加密信息、 参考位置、 GPS参考时间、 异常卫星 ID 等, 作为定位辅助数据。
如果 UE没有保存 ValuetagofGPS和 SatlD, 或者从 SIB12 中读取的 ValuetagofGPS和 SatlD中存在一个或两个与 UE自身保存的这两者值不同, 表明 GPS辅助信息发生了更新, UE保存 ValuetagofGPS和 SatlD, 并需要 读取 DGPS、 Transmission TOW , GPS Ephemeris and Clock Correction Parameters和 GPS navigation Parameters信息作为定位辅助数据。
如果具备 LCS 能力的 UE 读取 SIB12 后, valuetagofOTDOA , ValuetagofCommonGPS , ValuetagofGPS与 SatlD值都与 UE自身保存的相 应值相同, 表明辅助定位数据没有更新, UE不再进一步读取 SIB12消息内 谷。
需要说明的是,如果 UE不具备 LCS能力,则忽略广播消息中的 SIB12。 本步骤中,将 LCS系统信息块通过广播的方式下发,减轻了系统负荷。 步骤 101: 利用获得的定位辅助数据进行定位。
利用获得的定位辅助数据定位以确定用户位置。 本步骤中的定位方法 可以采用现有一种或者更多的定位方法, 这里定位方法并不限定本发明方 法的应用。 确定用户位置主要包括无线信号测量和基于测量的位置估计计 算。
其中, 信号测量可以在用户终端、 基站和定位测量单元中进行, 定位 估计计算可以在用户终端或无线接入网中进行。 在上述定位处理过程中, 根据定位方法的不同, 需要一些辅助信息来协助完成定位过程, 如: 卫星 定位时的星历图、 修正数据、 加密信息等。 对于这些辅助信息, 考虑通过 系统消息以小区广播的形式下发给 UE。 基于上述考虑, 在 LTE中, 增加 LCS系统消息 SIB12, 用于发送定位辅助数据。
针对本发明方法, 还提供一种系统, 图 3为本发明 LTE系统中实现定 位的系统的组成结构示意图, 如图 3 所示, 该系统包括网络侧和用户侧, 其中,
网络侧, 用于设置 LCS系统信息块, 并广播 LCS系统信息块。
用户侧, 用于接收广播消息, 根据广播的 LCS系统信息块获取定位辅 助数据, 利用获得的定位辅助数据进行定位。
用户侧为具备 /不具备 LCS能力的终端。
以上所述, 仅为本发明的较佳实施例而已, 并非用于限定本发明的保 护范围, 凡在本发明的精神和原则之内所作的任何修改、 等同替换和改进 等, 均应包含在本发明的保护范围之内。

Claims

权利要求书
1、 一种长期演进 LTE系统中实现定位的方法, 其特征在于, 该方法包 括:
用户终端 UE根据网络侧广播的定位业务 LCS系统信息块获取定位辅 助数据, 并利用获得的定位辅助数据进行定位。
2、根据权利要求 1所述的方法, 其特征在于, 所述 LCS系统信息块为 系统信息 SI消息中增加的系统信息块 12 SIB12。
3、 根据权利要求 2所述的方法, 其特征在于, 所述 UE根据网络侧广 播的 LCS系统信息块获取定位辅助数据包括:
所述 UE收到广播消息, 在下行共享信道中读取 SIB1 , 通过 SIB1获取
LCS系统信息块的调度信息;
所述 UE根据获得的调度信息读取 SIB12,并从 SIB12中获取定位辅助 数据。
4、 根据权利要求 3所述的方法, 其特征在于, 所述 SIB12中携带有对 应不同定位方式的、 用于表示是否存在更新的定位辅助数据的值标签, 以及, 基于可观察的到达时间差 OTDOA的定位辅助数据, 和 /或基于 全球定位系统 GPS类通用的定位辅助数据, 和 /或基于 GPS类的定位辅助 数据。
5、 根据权利要求 4所述的方法, 其特征在于, 所述值标签包括: 用于表示 OTDOA类定位辅助数据是否改变的值标签;
和 /或用于表示 GPS类通用定位辅助数据是否改变的值标签; 和 /或用于表示 GPS类定位辅助数据是否改变的值标签。
6、 根据权利要求 5所述的方法, 其特征在于, 所述基于可观察的到达 时间差 OTDOA的定位辅助数据包括:
OTDOA加密信息, 和 /或 UE辅助 OTDOA定位的辅助数据, 和 /或基 于 UE的 OTDOA定位的辅助数据。
7、 根据权利要求 5所述的方法, 其特征在于, 所述基于全球定位系统 GPS类通用定位辅助数据包括: GPS数据加密信息、 参考位置、 GPS参考 时间、 异常卫星 ID。
8、根据权利要求 5所述的方法, 其特征在于, 所述基于 GPS类的定位 辅助数据包括: 卫星 ID, 以及,
差分 GPS信息, 和 /或卫星的星期时间, 和 /或 GPS星历和时间修正系 数, 和 /或 GPS导航参数。
9、 根据权利要求 6、 7或 8所述的方法, 其特征在于, 所述从 SIB12 中获取定位辅助数据包括:
如果所述 UE没有保存用于表示 OTDOA类定位辅助数据是否改变的值 标签, 或者从 SIB12中读取的用于表示 OTDOA类定位辅助数据是否改变 的值标签与 UE自身保存有的值不同,则 UE保存表示 OTDOA类定位辅助 数据是否改变的值标签, UE读取 OTDOA加密信息、 UE辅助 OTDOA定 位的辅助数据作为定位辅助数据; 如果 UE支持基于 UE的定位, UE进一 步读取基于 UE的 OTDOA定位的辅助数据作为定位辅助数据;
如果所述 UE没有保存用于表示 GPS类通用定位辅助数据是否改变的 值标签, 或者从 SIB12中读取的用于表示 GPS类通用定位辅助数据是否改 变的值标签与 UE 自身保存的值不同, 则 UE保存用于表示 GPS类通用定 位辅助数据是否改变的值标签, UE读取 GPS数据加密信息、 参考位置、 GPS参考时间、 异常卫星 ID作为定位辅助数据;
如果所述 UE没有保存用于表示 GPS类定位辅助数据是否改变的值标 签和卫星 ID,或者从 SIB12中读取的用于表示 GPS类定位辅助数据是否改 变的值标签和卫星 ID中存在至少一个与 UE自身保存的这两者值不同, 则 UE保存用于表示 GPS类定位辅助数据是否改变的值标签和卫星 ID, UE读 取差分 GPS信息、卫星的星期时间、 GPS星历和时间修正系数和 GPS导航 参数信息作为定位辅助数据。
10、 一种长期演进 LTE系统中实现定位的系统, 其特征在于, 该系统 包括网络侧和用户侧, 其中,
网络侧, 用于设置 LCS系统信息块, 并广播 LCS系统信息块; 用户侧, 用于接收广播消息, 根据广播的 LCS系统信息块获取定位辅 助数据, 利用获得的定位辅助数据进行定位。
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