WO2018201501A1 - 一种辅助数据传输方法、设备及系统 - Google Patents

一种辅助数据传输方法、设备及系统 Download PDF

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Publication number
WO2018201501A1
WO2018201501A1 PCT/CN2017/083355 CN2017083355W WO2018201501A1 WO 2018201501 A1 WO2018201501 A1 WO 2018201501A1 CN 2017083355 W CN2017083355 W CN 2017083355W WO 2018201501 A1 WO2018201501 A1 WO 2018201501A1
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WO
WIPO (PCT)
Prior art keywords
positioning
auxiliary data
data
network device
different
Prior art date
Application number
PCT/CN2017/083355
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English (en)
French (fr)
Inventor
李晨琬
于映辉
曹振臻
Original Assignee
华为技术有限公司
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 华为技术有限公司 filed Critical 华为技术有限公司
Priority to RU2019139439A priority Critical patent/RU2732196C1/ru
Priority to EP17908281.3A priority patent/EP3611970B1/en
Priority to JP2019560742A priority patent/JP7050813B2/ja
Priority to PCT/CN2017/083355 priority patent/WO2018201501A1/zh
Priority to CN201780090172.4A priority patent/CN110622566B/zh
Publication of WO2018201501A1 publication Critical patent/WO2018201501A1/zh
Priority to US16/673,366 priority patent/US10863308B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/023—Services making use of location information using mutual or relative location information between multiple location based services [LBS] targets or of distance thresholds
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/04—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing carrier phase data
    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/05—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data
    • G01S19/06—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing aiding data employing an initial estimate of the location of the receiver as aiding data or in generating aiding data
    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/07—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
    • G01S19/071—DGPS corrections
    • 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
    • G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
    • G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/07—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing data for correcting measured positioning data, e.g. DGPS [differential GPS] or ionosphere corrections
    • G01S19/072—Ionosphere corrections
    • 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
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-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
    • G01S5/0205—Details
    • G01S5/0236—Assistance data, e.g. base station almanac
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/02—Services making use of location information
    • H04W4/024—Guidance services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Definitions

  • the present application relates to the field of communications technologies, and in particular, to an auxiliary data transmission method, device, and system.
  • the global positioning system is a high-precision positioning navigation system. Due to the influence of satellite clock error, ephemeris error and ionospheric error, the accuracy of this method can reach 15 meters. Application scenarios such as drones, smart driving or vertical markets. The introduction of carrier phase difference (RTK) technology can effectively improve the positioning accuracy.
  • RTK carrier phase difference
  • FIG. 1 is a schematic diagram showing the principle of realizing terminal device positioning by using an RTK server.
  • the RTK server obtains the reference data through the third-party satellite ground reference station, that is, the third-party differential satellite correction number, and the terminal device to be located needs to report its own GPS location information, and then the RTK server reports the reference data according to the received reference data and the terminal device itself.
  • the GPS position information is calculated and the RTK correction number is calculated and transmitted to the terminal device, and the terminal device calculates the high-precision position by using the RTK correction number and the obtained GPS position information.
  • the existing RTK positioning technology requires the terminal device to report its own GPS location information, which has a security risk problem, and the RTK server transmits the RTK correction number to the terminal device through unicast, which is inefficient.
  • the embodiment of the present invention provides a method, a device, and a system for assisting data transmission, so as to solve the problem that the existing RTK positioning technology requires the terminal device to report its own GPS location information, which has a security risk problem and is inefficient.
  • an auxiliary data transmission method including:
  • the network device obtains the auxiliary data from the positioning data center
  • the network device sends the auxiliary data to the terminal device by means of a broadcast, where the auxiliary data is data used by the terminal device for positioning.
  • the network device After the network device obtains the auxiliary data, it notifies the terminal device of the auxiliary data by means of broadcast, which avoids the defects of high security risks caused by the terminal reporting the location information in the prior art, and improves the data transmission efficiency by using the broadcast mode. .
  • the network device obtains auxiliary data from the positioning data center, including:
  • the network device acquires the auxiliary data from the positioning data center in a segmented manner.
  • the network device performs segmental transmission of the auxiliary data, and can perform data transmission according to the resource condition of the network device to ensure system performance under the premise of data transmission.
  • the network device obtains auxiliary data from the positioning data center, including:
  • the network device acquires auxiliary data for different positioning methods from the positioning data center;
  • the network device acquires assistance data for different satellite positioning systems from the positioning data center.
  • the network device distinguishes between different positioning accuracy or positioning methods or satellite positioning systems to transmit auxiliary data. It is more convenient to obtain auxiliary data from multiple dimensions, so that effective distinction of auxiliary data can be achieved.
  • the method before the network device obtains the auxiliary data from the positioning data center, the method further includes:
  • the network device sends a first message to the positioning data center, where the first message is used to request to acquire the auxiliary data, where the first message includes a size indication information of a data packet schedulable by the network device and/or Or transmission cycle indication information.
  • the network device further indicates the accurate transmission of the auxiliary data by indicating the size indication information and/or the transmission period indication information of the data packet schedulable by the network device by using the first message.
  • the network device obtains auxiliary data from the positioning data center, including:
  • the network device acquires the auxiliary data from the positioning data center in a segmented manner.
  • the network device performs segmental transmission of the auxiliary data, and can perform data transmission according to the resource condition of the network device to ensure system performance under the premise of data transmission.
  • the network device sends the auxiliary data to a terminal device by means of a broadcast, including:
  • the network device broadcasts the segmented auxiliary data through different system information block SIB types; or the network device sends different data packets using the same SIB type to the terminal device device.
  • the method further includes:
  • the network device After receiving the auxiliary data, the network device segments the auxiliary data before sending the auxiliary data to the terminal device by means of broadcasting;
  • the sending, by the network device, the auxiliary data to the terminal device by means of a broadcast including:
  • the segmented auxiliary data is broadcast through different SIB types; or
  • Different data packets using the same SIB type are transmitted to the terminal device device.
  • the network device segments the auxiliary data, which can reduce the burden of locating the data center and improve the transmission efficiency of the auxiliary data.
  • the network device sends the auxiliary data to a terminal device by means of a broadcast, including:
  • the content of the auxiliary data broadcast by the network device to the terminal device includes a positioning method or a positioning accuracy or a satellite positioning system indicating each auxiliary data in the system message; or
  • the content of the auxiliary data broadcast by the network device to the terminal device is included in different data packets of the same SIB type, and the positioning method or the positioning accuracy or the positioning satellite positioning system of each auxiliary data is indicated according to the packet serial number.
  • the network device distinguishes different positioning accuracy or positioning methods or satellite positioning system transmission auxiliary data, and is more capable of acquiring auxiliary data from multiple dimensions, thereby enabling effective differentiation of the auxiliary data.
  • an auxiliary data transmission method including:
  • the positioning data center transmits the auxiliary data to a network device.
  • the positioning data center After the positioning data center obtains the auxiliary data, it transmits to the network device, improves the transmission efficiency of the auxiliary data, prevents the terminal from reporting the location information, and improves the security.
  • the positioning data center acquires the auxiliary data, including:
  • the positioning data center acquires the auxiliary data from a reference station
  • the positioning data center calculates the auxiliary data based on the auxiliary data acquired from the reference station.
  • the method before the positioning data center acquires the auxiliary data, the method further includes:
  • the positioning data center Receiving, by the positioning data center, the first message sent by the network device, where the first message is used to request to acquire the auxiliary data, where the first message includes size indication information of a data packet that can be scheduled by the network device, and/or Or transmission cycle indication information.
  • the positioning data center transmits the auxiliary data according to the first message, which is beneficial to the effective transmission of the auxiliary data, improves the transmission efficiency, and avoids data loss.
  • the positioning data center transmits the auxiliary data to a network device, including:
  • the positioning data center sends the auxiliary data to the network device in a segmented manner.
  • the positioning data center will segment the auxiliary data to prevent data transmission and improve data transmission security.
  • the method further includes:
  • the positioning data center sends system message period indication information to the network device, indicating a system message transmission period adopted by the network device.
  • the positioning data center transmits the auxiliary data to a network device, including:
  • the positioning data center transmits auxiliary data of different positioning precisions to the network device in different fields or in different messages; or
  • the positioning data center transmits the auxiliary data of different positioning methods to the network device in different fields or in different messages; or
  • the positioning data center transmits auxiliary data of different satellite positioning systems to the network device in different fields or in different messages.
  • a network device including:
  • a receiving module configured to obtain auxiliary data from the positioning data center
  • a sending module configured to send, by using a broadcast, the auxiliary data acquired by the receiving module to the terminal device, where the auxiliary data is data used by the terminal device for positioning.
  • the receiving module is specifically configured to:
  • the auxiliary data is obtained from the positioning data center in a segmented manner.
  • auxiliary data from the positioning data center specifically:
  • the sending module is further configured to:
  • the receiving module Before the receiving module acquires the auxiliary data from the positioning data center, sending a first message to the positioning data center, where the first message is used to request to acquire the auxiliary data, where the first message includes the network device Scheduled
  • the size of the data packet indicates information and/or transmission period indication information.
  • the receiving module is specifically configured to:
  • the auxiliary data is obtained from the positioning data center in a segmented manner.
  • the sending module is specifically configured to:
  • the segmented auxiliary data is broadcasted through different system information block SIB types; or different data packets using the same SIB type are transmitted to the terminal device device.
  • the network device further includes a processing module, specifically configured to:
  • the sending module segments the auxiliary data before broadcasting to the terminal device;
  • the sending module is specifically configured to:
  • the segmented auxiliary data is broadcast through different SIB types; or
  • Different data packets using the same SIB type are transmitted to the terminal device device.
  • the sending module sends the auxiliary data to the terminal device in a broadcast manner, and is used to indicate a positioning network device or a positioning accuracy or a satellite positioning system of each auxiliary data in the system message; or
  • the positioning method or the positioning accuracy or the positioning satellite positioning system of each auxiliary data is indicated according to the packet serial number.
  • the physical device corresponding to the processing module in the foregoing embodiment may be a processor, and the physical device corresponding to the sending module may be a transmitter, and the physical device corresponding to the receiving module may be a receiver.
  • a positioning server including:
  • a processing module configured to acquire auxiliary data, where the auxiliary data is data used by the terminal device for positioning;
  • the processing module is specifically configured to:
  • the auxiliary data is calculated based on the auxiliary data acquired from the reference station.
  • the positioning server further includes a receiving module, configured to:
  • the processing module Receiving, by the processing module, the first message sent by the network device, where the first message is used to request to acquire the auxiliary data, where the first message includes data that can be scheduled by the network device.
  • the size indication information and/or transmission period indication information of the packet are included in the packet.
  • the sending module is specifically configured to:
  • the auxiliary data is sent to the network device in a segmented manner.
  • the sending module is further configured to:
  • the sending module when the sending module transmits the auxiliary data to the network device, the sending module is specifically configured to:
  • the auxiliary data of different satellite positioning systems are transmitted to the network device in different fields or in different messages.
  • the physical device corresponding to the processing module in the foregoing embodiment may be a processor, and the sending module corresponds to The physical device can be a transmitter.
  • an auxiliary data transmission method including:
  • auxiliary data sent by the network device by means of a broadcast, where the auxiliary data is data used by the terminal device for positioning;
  • the terminal device performs positioning by using the auxiliary data.
  • the terminal obtains the auxiliary data by means of broadcast to achieve its own positioning, avoids the periodic reporting of the location information in the prior art, avoids the security risk, and saves the power consumption of the terminal device by means of the broadcast.
  • the terminal device receives the auxiliary data that is sent by the network device by using a broadcast, and includes:
  • the terminal device receives the segmented auxiliary data that is broadcast by the network device by using different system information block SIB types; or receives the segmented auxiliary data that is sent by the network device using different data packets of the same SIB type.
  • the terminal device receives the content of the auxiliary data that is sent by the network device by means of a broadcast, and includes a positioning method or a positioning accuracy or a satellite positioning system indicating each auxiliary data in the system message; or
  • the positioning method or the positioning accuracy or the positioning satellite positioning system of each auxiliary data is indicated according to the packet serial number.
  • auxiliary data which realizes differentiated transmission of auxiliary data
  • the terminal device can acquire necessary auxiliary data and save power consumption of the terminal device.
  • a terminal device including:
  • a receiving module configured to receive auxiliary data that is sent by the network device by using a broadcast, where the auxiliary data is data used by the terminal device for positioning;
  • a processing module configured to perform positioning by using the auxiliary data.
  • the receiving module is specifically configured to:
  • the receiving module receives the content of the auxiliary data sent by the network device by means of broadcasting, and includes a positioning method or a positioning accuracy or a satellite positioning system indicating each auxiliary data in the system message; or
  • the positioning method or the positioning accuracy or the positioning satellite positioning system of each auxiliary data is indicated according to the packet serial number.
  • the physical device corresponding to the processing module in the foregoing embodiment may be a processor, and the physical device corresponding to the receiving module may be a receiver.
  • a communication system including the network device, the positioning server, and the terminal device, which are involved in the foregoing embodiments.
  • a computer storage medium for storing computer software instructions for use in the network device described above, comprising a program designed to perform the above aspects.
  • a computer storage medium for storing computer software instructions for use in positioning the data center described above, including a program designed to perform the above aspects.
  • a computer storage medium for storing a computer software finger used by the terminal device
  • the program contains programs designed to perform the above aspects.
  • FIG. 1 is a schematic diagram of a conventional principle for realizing terminal device positioning by using an RTK server
  • FIG. 2 is a network architecture diagram of an embodiment of the present application.
  • FIG. 3 is a schematic flowchart diagram of an auxiliary data transmission method according to an embodiment of the present application.
  • FIG. 4 is a schematic flowchart of an auxiliary data transmission method according to an embodiment of the present application.
  • FIG. 5 is a schematic structural diagram of a network device according to an embodiment of the present application.
  • FIG. 5b is a schematic structural diagram of hardware of a network device according to an embodiment of the present application.
  • FIG. 6a is a schematic structural diagram of a positioning server according to an embodiment of the present application.
  • 6b is a schematic structural diagram of hardware of a positioning server according to an embodiment of the present application.
  • FIG. 7a is a schematic structural diagram of a terminal device according to an embodiment of the present application.
  • 7b is a schematic structural diagram of hardware of a terminal device according to an embodiment of the present application.
  • FIG. 8 is a schematic structural diagram of a communication system according to an embodiment of the present application.
  • association relationship describing an association object, indicating that there may be three relationships, for example, A and/or B, which may indicate that A exists separately, and A and B exist at the same time. There are three cases of B alone.
  • the character “/” in the embodiment of the present application generally indicates that the context related object is an “or” relationship.
  • auxiliary data transmission method in the embodiment of the present application is applicable to a Long Term Evolution (LTE) system, such as an NB-IoT system; in addition, the auxiliary data transmission method in the embodiment of the present application is also applicable to other wireless communications.
  • Systems such as Global System for Mobile Communication (GSM), Universal Mobile Telecommunications System (UMTS), Code Division Multiple Access (CDMA) systems, and, in addition, The subsequent evolution system of the LTE system is used, such as the fifth generation 5G system.
  • GSM Global System for Mobile Communication
  • UMTS Universal Mobile Telecommunications System
  • CDMA Code Division Multiple Access
  • the subsequent evolution system of the LTE system is used, such as the fifth generation 5G system.
  • FIG. 2 is a network architecture diagram of an embodiment of the present application, including a terminal device, a base station, and a positioning data center. For the specific connection relationship, refer to FIG. 2 .
  • the base station in the embodiment of the present application can be used to convert the received air frame and the Internet Protocol (IP) packet into each other as a router between the wireless terminal device and the rest of the access network, where the access network
  • IP Internet Protocol
  • the base station in the embodiment of the present application may coordinate the attribute management of the air interface.
  • the base station in the embodiment of the present application may be a Global System for Mobile Communication (GSM) or a Base Transceiver Station (BTS) in Code Division Multiple Access (CDMA). It is a base station (NodeB) in the Wideband Code Division Multiple Access (WCDMA), and may also be an evolved base station (eNB or e-NodeB) in LTE, or may be a fifth generation 5G.
  • the new radio (NR) in the system is not limited in the embodiment of the present application.
  • the terminal device in the embodiment of the present application may be a device for providing voice and/or data connectivity to a user, a handheld device having a wireless connection function, or other processing device connected to a wireless modem.
  • the terminal device may also be a wireless terminal device, wherein the wireless terminal device may communicate with one or more core networks via a Radio Access Network (RAN), and the wireless terminal device may be a mobile terminal device, such as a mobile phone ( Or a "cellular" telephone, or a computer with a mobile terminal device, for example, a computer with a mobile terminal device can be a portable, pocket, handheld, computer built-in or in-vehicle mobile device with a wireless access network Exchange language and/or data.
  • RAN Radio Access Network
  • the wireless terminal device can also be a Personal Communication Service (PCS) phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a personal number. Assistant (Personal Digital Assistant, PDA) and other devices.
  • the wireless terminal device may also be referred to as a system, a Subscriber Unit, a Subscriber Station, a Mobile Station, a Mobile, a Remote Station, and an Access Point. , Remote Terminal, Access Terminal, User Terminal, User Agent, User Device, User Equipment (UE), etc. .
  • the positioning data center involved in the embodiment of the present application may include a positioning server, such as an Evolved Serving Mobile Location Center (E-SMLC) and a Gateway Mobile Location Center (G-MLC).
  • Other servers such as RTK servers (also known as control centers, computing centers), RTK servers or control centers are servers for calculating corrections.
  • the positioning server and the RTK server may be two separate entities or may be integrated. Between the positioning server and the RTK server, an interface that needs to be standardized or a private interface may be defined.
  • the positioning server and the RTK server are regarded as integrated entities, which are referred to herein as positioning data centers, that is, if this is
  • the two servers are two separate entities or have a newly defined interface between them.
  • the network device involved in the embodiment of the present application may be a base station, or an access point, or may refer to a device in the access network that communicates with the wireless terminal through one or more sectors on the air interface.
  • the base station can be used to convert the received air frame to the IP packet as a router between the wireless terminal and the rest of the access network, wherein the remainder of the access network can include an Internet Protocol (IP) network.
  • IP Internet Protocol
  • the base station can also coordinate attribute management of the air interface.
  • the base station may be a base station (BTS, Base Transceiver Station) in GSM or CDMA, or may be a base station (NodeB) in WCDMA, or may be an evolved base station (eNB or e-NodeB, evolutional Node B) in LTE. This application is not limited.
  • the network device in the embodiment of the present application is described by taking a base station as an example. This is only an example of the embodiment of the present application, and the present invention is not limited thereto.
  • the network device receives the auxiliary data from the positioning data center; and broadcasts to the terminal device, where the auxiliary data is data used by the terminal device for positioning, because the terminal device is prevented from regularly reporting its own location information, To some extent, the security risks of the terminal device are reduced. Since the auxiliary data is sent to the terminal device by means of broadcasting, the transmission efficiency of the auxiliary data is improved, and the life of the battery in the terminal device is improved.
  • the embodiment of the present application provides an auxiliary data transmission method, device, and system, to solve the problem of how the existing RTK positioning technology and the existing cellular network combine to perform data transmission.
  • the method and the device are based on the same inventive concept. Since the principles of the method and the device for solving the problem are similar, the implementation of the device and the method can be referred to each other, and the repeated description is not repeated.
  • FIG. 3 is a schematic flowchart diagram of an auxiliary data transmission method provided by an embodiment of the present application, and the process may be specifically implemented by hardware, software programming, or a combination of hardware and software.
  • the functional modules for performing the auxiliary data transmission scheme provided by the embodiments of the present application may be specifically implemented by hardware, software programming, and a combination of hardware and software, and the hardware may include one or more signal processing and/or application specific integrated circuits.
  • the process specifically includes the following processes:
  • Step 31 The positioning data center acquires auxiliary data, where the auxiliary data is used by the terminal device to locate the used data.
  • auxiliary data may include at least one of the following data: reference station location information, reference station original measurement value or correction number, RTK data, real-time kinematic pesudorange difference (RTD) Other data such as data, ionospheric data, ephemeris data, correction data calculated by the data center, and auxiliary data of other cellular positioning methods, such as Observed Time Difference Of Arrival (OTDOA) auxiliary data.
  • RTK real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange difference
  • OTD real-time kinematic pesudorange
  • the positioning data center acquires the auxiliary data
  • the following process may be obtained:
  • the positioning data center acquires reference data from a reference station.
  • S2 The data calculated according to the reference data and the location information of the network device.
  • S3 The data generated by the location data center according to the location of the target network device.
  • the method further includes the step 30: the positioning data center receives a first message sent by the network device, where the first message is used to request to acquire the auxiliary data.
  • the first message may be an LTE Positioning Protocol Annex (LPPA) message, and the first message includes size indication information and/or transmission period indication information of the data packet schedulable by the network device.
  • the content that the first message can include has the size of the schedulable SIB data packet, that is, the transport block size (TBS) of the SIB or the upper limit of the SIB transport block size, and the system information (SI) period or
  • TBS transport block size
  • SI system information
  • the system message transmission interval may be an SI period or a system message transmission interval that the network device intends to transmit, or may be one or more SI periods or system message transmission intervals supported by the network device.
  • Step 32 The network device acquires the auxiliary data from the positioning data center.
  • the auxiliary data may be sent to the network device by using the second message.
  • the second message may be an LPPA message, which may be an auxiliary data response message or an auxiliary data providing message.
  • the transmission frequency of the correction number can be regarded as 1HZ, and in the experiment, the data packet size is usually about 1-2 Kbytes per second. Therefore, specifically, the positioning data center can be based on the SIB transmission block size supported by the network device, or the SIB transmission block.
  • the upper limit is that the large data packet is segmentally transmitted, that is, the auxiliary data is segmentally transmitted according to the size of the SIB transport block.
  • the positioning data center may carry the packet sequence number of each segmented auxiliary data, and indicate whether the data packet is the last data packet or the like.
  • the positioning data center sends system message period indication information to the network device, indicating a system message transmission period adopted by the network device.
  • system message period indication information indicating a system message transmission period adopted by the network device.
  • an SI period or a system message transmission interval may be sent to the network device according to the number of segments divided by the auxiliary data, so that the network device can broadcast the auxiliary data in time, for example, the transmission is completed within 1 second.
  • the network device may be notified to transmit using a smaller SI transmission period.
  • a smaller SI transmission period such as carrying a small SI cycle or system elimination
  • the information transmission interval, or an indication information is used to indicate that the network device uses a small SI period or a system message transmission interval, so that the network device can broadcast a large data packet in time.
  • the positioning data center sends the auxiliary data to the network device, and may send the data packet at a size that allows data transmitted in one SIB block at a time.
  • the message format of the second message may be as shown in Table 1, or one may be used.
  • the list sends the split packets to the network device in the form of a list.
  • the message format of the second message can be seen in Table 2.
  • the auxiliary data does not need to be segmented and unpacked, and can be directly sent to the network device.
  • the positioning data center transmits the auxiliary data to the network device, the following situations may be included:
  • Case 1 The positioning data center transmits auxiliary data of different positioning precisions to the network device in different fields or in different messages.
  • Case 2 The positioning data center transmits the auxiliary data of different positioning methods to the network device in different fields or in different messages.
  • the positioning data center When the positioning data center sends the auxiliary data to the network device, it can distinguish different positioning accuracy and positioning methods. Different positioning accuracy also corresponds to different positioning methods.
  • the RTD method can obtain the positioning accuracy of the sub-meter level
  • the RTK method can achieve the definition accuracy of the centimeter level
  • other positioning methods such as position difference, pseudo-range difference, phase Smoothing and other pseudorange differences, carrier phase difference, local differential GPS, wide-area differential GPS, virtual reference station (VRS) network RTK, medium access control (MAC) network RTK, regional correction Position correction parameters (FKP) network RTK, network pseudo-phase difference (Real Time DGPS, RTD) method and other positioning methods
  • these positioning methods are different
  • the corresponding positioning accuracy may be different, so the positioning data center is sending auxiliary data to Network devices need to distinguish between transmissions, for example using different messages, for example using different fields of a message.
  • Table 3 shows an example of an LPPA message transmitting auxiliary data using different fields to distinguish between a network RTD and a network RTK.
  • Case 3 The positioning data center transmits auxiliary data of different satellite positioning systems to the network device in different fields or in different messages.
  • the positioning data center When the positioning data center sends the auxiliary data to the network device, it can distinguish different satellite positioning systems.
  • the existing satellite positioning systems include the US GPS, the Russian Glonass, the European Galileo, the Chinese Beidou satellite navigation system, and related Augmentation systems such as WAAS (Wide Area Augmentation System) in the United States, EGNOS (European Static Navigation Overlay System) in Europe, and MSAS (Multifunctional Transportation Satellite Augmentation System) in Japan.
  • WAAS Wide Area Augmentation System
  • EGNOS European Static Navigation Overlay System
  • MSAS Multifunctional Transportation Satellite Augmentation System
  • segment transmission method can also be used, for example, segmenting data of a positioning method or a positioning navigation system to ensure that the system message can be transmitted. .
  • the network device receives the auxiliary data from the positioning data center, the following two possible implementation manners are included:
  • the network device acquires the auxiliary data from the positioning data center in a segmented manner.
  • the network device After receiving the auxiliary data, the network device segments the auxiliary data, where the positioning data center does not segment the big data, but is divided by the network device. segment. This method also includes two ways:
  • the network device does not readable the positioning assistance data, and performs segmentation according to the size of the system message resource block.
  • a certain RTCM message may be truncated, so that the terminal device cannot obtain the complete message of the last RTCM when acquiring the data.
  • the network device can read the positioning assistance data information, and ensure that the data is not truncated while scheduling data according to the resources.
  • the network device receives the auxiliary data from the positioning data center, including:
  • the network device acquires auxiliary data of different positioning precisions from the positioning data center; or acquires auxiliary data for different positioning methods from the positioning data center; or acquires auxiliary data for different satellite positioning systems from the positioning data center. That is, the positioning data center is sent to the network device by distinguishing different positioning accuracy or positioning methods or satellite positioning systems. The network device performs further segmentation processing.
  • Step 33 The network device broadcasts the auxiliary data to the terminal device.
  • the network device broadcasts to the terminal device, the following two methods may be included:
  • Manner 1 The network device broadcasts the segmented auxiliary data through different SIB types.
  • the network device can broadcast the auxiliary data of different segments using different SIB types, such as SIBX, SIBY, X, and Y, which are positive integers, and distinguish different SIB types, such as LTE.
  • SIB1 SIB2.
  • SIB types may be used to transmit different positioning accuracy, positioning methods or auxiliary data of the satellite positioning system, such as SIBX broadcast RTK data, SIBY broadcast RTD data.
  • Manner 2 The network device uses different data packets of the same SIB type when the segmented auxiliary data is sent to the terminal device.
  • the data packet of the same SIB type for example, the data packet of the same SIB type is SIB5, and has a SI period of a certain transmission, that is, the SIB5 is broadcasted every SI period, and the SIB5 broadcasted in each SI period here belongs to the SIB5.
  • Different packets. Therefore, packets of the same type are represented as packets that are broadcast for each transmission cycle or transmission interval.
  • the same type of data packet herein may also be a data packet that is sent by the SIB at the transmission interval by a transmission interval set by the network device.
  • the network device broadcasts the auxiliary data (using different SIB types or broadcasting using different data packets of the same SIB type)
  • the system message for transmitting the auxiliary data is different from other SIB types, and each SI The data transmitted during the period or transmission interval is different, so the change of the system message (SIB) does not affect the change of the value tag in SIB1, and is not affected by the change cycle.
  • SIB system message
  • the content that the network device broadcasts to the terminal device includes a positioning method or a positioning accuracy or a satellite positioning system that indicates each auxiliary data through a field or a cell in a system message, and may be performed in a data packet of the same SIB type.
  • the distinguishing indication may also be indicated in the SIBs of different SIB types; or the content that the network device broadcasts to the terminal device is included in different data packets of the same SIB type, and the positioning method of each auxiliary data is indicated according to the packet serial number or Positioning accuracy or positioning satellite positioning system.
  • the data of different content is broadcasted through one SIB block (data packet), and different positioning fields or positioning precision or satellite positioning system of different auxiliary data may be indicated in different fields or IEs in the system message. If different fields are used to indicate which positioning system or positioning method is used, and so on. If different SIB blocks (data packets) of the same SIB type are used for auxiliary data transmission or broadcast using different SIB types, it may be specified in SIB1 which specific SIB blocks or SIB type transmissions of a certain SIB type.
  • the positioning method or the positioning accuracy or the auxiliary data of the satellite positioning system such as indicating that a certain SIB block or SIB type transmits RTD data, and some transmissions are RTK data.
  • each SIB block (packet) of a certain SIB type it is indicated that this is the first SIB block (data packet), and the data of which positioning method is transmitted by this SIB block, this time data transmission is divided into several
  • the SIB block transmits different positioning accuracy or positioning methods or SIB blocks of the satellite positioning system, etc., that is to say, which data is transmitted by the corresponding serial number packet by the packet sequence number of each data packet.
  • the positioning data center or the network device splits a large auxiliary data into n packets, and n is a positive integer
  • the data type corresponding to the sequence number of all the packets is indicated in each packet, and the data type is determined according to the positioning method or
  • the positioning accuracy or satellite positioning system or data of different periods is distinguished.
  • the terminal device reads one of the packets, and it can be known which of the following several packets is required by the terminal device.
  • the SIB block here refers to a different data packet sent by the same SIB type, such as a data packet (MAC PDU) sent by the SIB every SI transmission period or transmission interval.
  • MAC PDU data packet
  • the content sent by the SIB in each SI period in the modification period is the same, where the content broadcasted in each SI period is different, that is, one data packet or SIB block is sent in each SI transmission period, and these are
  • the label of the data packet or SIB block can be known as the first data packet or data block.
  • the packet sequence number here is sorted by the segment when the previous big packet is split. For large packets before different segments, the number can be independently numbered after unpacking, or the number can be accumulated until the maximum allowed is reached. Value, then start with 0 or 1.
  • auxiliary data is placed in one SIB block or a certain SIB type, such as SIBX, and different auxiliary data of different methods are transmitted separately, such as using different SIB blocks or different SIB types.
  • the public part may be the ionosphere, tropospheric data and other large-period data changes, they can be placed in a single SIB, only the UE needs to read when changing, such data can have a separate value tag and / or change cycle The terminal device only needs to read when it finds its change.
  • the terminal device can demodulate the data according to the positioning method or the positioning accuracy or the satellite positioning system supported by itself or use the corresponding key to obtain the information.
  • each packet After splitting the large data package of the auxiliary data into multiple small packets, each packet has its own packet serial number, and the network device can be large when broadcasting these small data packets.
  • the packet sequence number or index value of all the data packets split by the packet is broadcasted, and correspondingly, which positioning numbers correspond to which positioning accuracy or positioning method or satellite positioning system.
  • the broadcast sequence numbers 1, 2, 3, 4, and 5 are broadcast in each package, and 1, 2, 3 are GPS, and 4, 5 are GLONASS.
  • the terminal device accepts the GPS system, when the first packet is read, it is known that only 1, 2, and 3 packets are data to be read, and the latter two packets do not need to be read any more.
  • the positioning method is similar.
  • the network device sends a third message to notify the positioning data center, where the third message carries a new one.
  • the size indication information of the scheduled data packet may be the transport block size or upper limit of the SIB, or notify the positioning data center if it cannot be sent.
  • the positioning data center When the positioning data center sends the auxiliary data to the network device, it can distinguish different positioning accuracy or positioning methods or satellite positioning systems. Different positioning accuracy also corresponds to different positioning methods. For example, the RTD method can obtain the positioning accuracy of the sub-meter level, and the RTK method can achieve the positioning accuracy of the centimeter level. There may be other positioning methods, so the positioning data center needs to distinguish between sending when sending auxiliary data to the network device, for example, using different messages for sending or using a different field of a message to send.
  • the data volume of each part may still be much larger than the data of the SIB broadcast, and the segmentation described above is required. For example, data of different precisions is segmented, data of different positioning methods are segmented, and different satellite positioning navigation systems are segmented. An example is shown in Table 4 and Table 5:
  • the LPPA message sent by the positioning data center to the network device may be a segment transmission of each type of data or only one data packet of the data type may be sent at a time, or may be transmitted by one data list, and multiple segments may be transmitted. The subsequent packets are sent together to the network device. If you pass a segment or packet each time, you need to transfer multiple messages to complete a certain type of data transfer.
  • the content broadcasted to the terminal device includes a positioning method or a positioning accuracy or a satellite positioning navigation system indicating each auxiliary data in the system message; or the network
  • the content broadcast by the device to the terminal device is included in different data packets of the same SIB type, and the positioning method or the positioning accuracy of each auxiliary data is indicated according to the packet sequence number, and the specific indication is as shown above.
  • the method for the segmentation of the data in the data center for the different positioning accuracy or the positioning method is the same as that of the first embodiment, and is not described here.
  • FIG. 4 illustrates the interaction process between the network device and the positioning data center by taking the network device segmentation of the auxiliary data.
  • Step 40 The network device sends a first message for requesting acquisition of the auxiliary data to the positioning data center. Optionally, step 40 may not be performed.
  • Step 41 The positioning data center sends the auxiliary data to the network device.
  • Step 42 The network device performs segmentation unpacking on the auxiliary data, and broadcasts to the terminal device.
  • the network device can read the auxiliary data, when the auxiliary data sent by the data center is located to the network device, the segmentation is not required.
  • the network device broadcasts, it can distinguish different positioning accuracy or different positioning methods or different satellite positioning systems or auxiliary data of different periods.
  • the SIB1 may be scheduled to indicate the transmission of different types of positioning data, or may be indicated in the SIB transmitting the positioning assistance data. Different SIB types can be used, or different data packets of the same SIB type can be used for transmission.
  • the positioning data center may also indicate different positioning accuracy or positioning methods or auxiliary data of the satellite positioning system.
  • the positioning data center is indicated by the LPPA message and sent to the network device, and the network device performs the auxiliary data. Perform segmentation processing.
  • the specific positioning data center or network device performs data differentiation according to the data type, and the data types include different positioning accuracy, methods, and satellite positioning navigation systems, but are not limited to these categories.
  • the positioning server such as the E-SMLC and the RTK server (control center)
  • the auxiliary data obtained by the RTK server is sent to the positioning server, such as the E-SMLC.
  • the auxiliary data transmission process between the E-SMLC and the UE may use the foregoing embodiment method.
  • the specific segment identification entity may be an RTK server, an E-SMLC, and a network device. If the RTK server is used, the RTK server is segmented and transmitted. To the E-SMLC, the E-SMLC is sent to the network device through the LPPA message, and the network device is sent to the terminal device through broadcast.
  • the specific segment transmission and broadcast method may adopt the method in the foregoing embodiment.
  • the network device performs unpacking of the auxiliary data according to the resource scheduling situation of the network device.
  • Each packet may also include a packet sequence number, and indicate which positioning accuracy or positioning method or satellite positioning system of a certain SIB transmission block is similar to the above embodiment, and details are not described herein again.
  • a network device is provided in the embodiment of the present application, where the network device is configured to perform the action or function of the network device in the foregoing method embodiment.
  • the embodiment of the present application further provides a positioning server, which is used to perform the action or function of the positioning data center in the foregoing method embodiment.
  • the embodiment of the present application further provides a terminal device, which is used to perform the action or function of the terminal device in the foregoing method embodiment.
  • the embodiment of the present invention further provides a communication system, including the network device, the positioning server, and the terminal device in the foregoing embodiment.
  • the content of the device part can be specifically seen in the method embodiment, and the repeated description will not be repeated.
  • the network device 500a in the embodiment of the present application includes: a receiving module 510a and a sending module 520a, wherein: a receiving module 510a is configured to obtain auxiliary data from a positioning data center; and a sending module 520a is configured to broadcast And sending the auxiliary data acquired by the receiving module 510a to the terminal device, where the auxiliary data is data used by the terminal device for positioning.
  • the receiving module 510a is specifically configured to:
  • the auxiliary data is obtained from the positioning data center in a segmented manner.
  • the receiving module 510a when the receiving module 510a obtains the auxiliary data from the positioning data center, specifically, the receiving module 510a is configured to:
  • the sending module 520a is further configured to:
  • the receiving module 510a Before the receiving module 510a obtains the auxiliary data from the positioning data center, sending a first message to the positioning data center, where the first message is used to request to acquire the auxiliary data, where the first message includes the network device
  • the size of the schedulable data packet indicates information and/or transmission period indication information.
  • the receiving module 510a is specifically configured to:
  • the auxiliary data is obtained from the positioning data center in a segmented manner.
  • the sending module 520a is specifically configured to:
  • the segmented auxiliary data is broadcasted through different system information block SIB types; or different data packets using the same SIB type are transmitted to the terminal device device.
  • the network device further includes a processing module 530a, specifically configured to:
  • the sending module 520a segments the auxiliary data before broadcasting to the terminal device;
  • the sending module 520a is specifically configured to:
  • the segmented auxiliary data is broadcast through different SIB types; or
  • Different data packets using the same SIB type are transmitted to the terminal device device.
  • the sending module 520a sends the auxiliary data to the terminal device in a broadcast manner, and is used to indicate a positioning network device or a positioning accuracy or a satellite positioning system of each auxiliary data in the system message; or is included in the same SIB type.
  • the positioning method or positioning accuracy of each auxiliary data or positioning satellite positioning system is indicated according to the packet number.
  • the processing module 530a may be implemented by a processor, and the sending module 520a may be implemented by a transceiver.
  • network device 500b can include a processor 510b, a transceiver 520b, and a memory 530b.
  • the memory 530b may be used to store a program/code pre-installed at the time of leaving the network device 500b, or may store a code or the like for execution of the processor 510b.
  • the processor 510b may be a general-purpose central processing unit (CPU), a microprocessor, an application specific integrated circuit (ASIC), or one or more integrated circuits for performing related operations.
  • CPU central processing unit
  • ASIC application specific integrated circuit
  • the network device 500b shown in FIG. 5b only shows the processor 510b, the transceiver 520b, and the memory 530b, in a specific implementation process, those skilled in the art should understand that the network device 500b also includes a normal implementation. Other devices necessary for operation. At the same time, those skilled in the art will appreciate that the network device 500b may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that the network device 500b may also only include the devices or modules necessary to implement the embodiments of the present application, and does not necessarily include all of the devices shown in FIG. 5b.
  • the storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).
  • the positioning server 600a of the embodiment of the present application includes a processing module 610a and a sending module 620a, where the processing module 610a is configured to acquire auxiliary data, where the auxiliary data is data used by the terminal device for positioning;
  • the module 620a transmits the auxiliary data acquired by the processing module 610a to the network device.
  • processing module 610a is specifically configured to:
  • the auxiliary data is calculated based on the auxiliary data acquired from the reference station.
  • the positioning server further includes a receiving module 630a, configured to:
  • the processing module 610a Before the processing module 610a acquires the auxiliary data, receiving a first message sent by the network device, where the first message is used to request to acquire the auxiliary data, where the first message includes that the network device is schedulable
  • the size of the data packet indicates information and/or transmission period indication information.
  • the sending module 620a is specifically configured to:
  • the auxiliary data is sent to the network device in a segmented manner.
  • the sending module 620a is further configured to:
  • the sending module 620a is specifically configured to:
  • the auxiliary data of different satellite positioning systems are transmitted to the network device in different fields or in different messages.
  • the processing module 610a may be implemented by a processor, and the sending module 620a may be implemented by a transceiver.
  • the location server 600b can include a processor 610b, a transceiver 620b, and a memory 630b.
  • the memory 630b may be used to store a program/code pre-installed by the location server 600b at the factory, or may store a code or the like for execution of the processor 610b.
  • the processor 610b may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for performing related operations to implement the technical solutions provided by the embodiments of the present application.
  • location server 600b also includes other devices necessary to achieve proper operation.
  • location server 600b may also include hardware devices that implement other additional functions, depending on the particular needs.
  • location server 600b may also only include the devices or modules necessary to implement the embodiments of the present application, and does not necessarily include all of the devices shown in FIG. 6b.
  • the above storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, or the like.
  • the terminal device 700a of the embodiment of the present application includes: a receiving module 720a and a processing module 710a, where the receiving module 720a is configured to receive auxiliary data that is sent by the network device by means of a broadcast, where the auxiliary data is Data used by the terminal device for positioning;
  • the processing module 710a is configured to perform positioning by using the auxiliary data.
  • the receiving module 720a is specifically configured to:
  • the receiving module 720a receives the content of the auxiliary data that is sent by the network device by means of a broadcast, and includes a positioning method or a positioning accuracy or a satellite positioning system that indicates each auxiliary data in the system message; or is included in the same SIB type. In different data packets, the positioning method or positioning accuracy of each auxiliary data or positioning satellite positioning system is indicated according to the packet number.
  • the processing module 710a may be implemented by a processor, and the receiving module 720a may be implemented by a transceiver.
  • the terminal device 700b may include a processor 710b, a transceiver 720b, and a memory 730b.
  • the memory 730b may be used to store a program/code pre-installed at the time of shipment of the terminal device 700b, or may store a code or the like for execution of the processor 710b.
  • the processor 710b may be a general-purpose CPU, a microprocessor, an ASIC, or one or more integrated circuits for performing related operations to implement the technical solutions provided by the embodiments of the present application.
  • terminal device 700b shown in FIG. 7b only shows the processor 710b, the transceiver 720b, and the memory 730b, in a specific implementation process, those skilled in the art should understand that the terminal device 700b also includes a normal implementation. Other devices necessary for operation. At the same time, according to specific needs, those skilled in the art will appreciate that the terminal device 700b may also include hardware devices that implement other additional functions. Moreover, those skilled in the art will appreciate that the terminal device 700b may also only include the devices or modules necessary to implement the embodiments of the present application, and does not necessarily include all of the devices shown in FIG. 7b.
  • the above storage medium may be a magnetic disk, an optical disk, a ROM, a RAM, or the like.
  • the communication system 810 of the embodiment of the present application includes any possible network device as shown in FIG. 5a or 5b and any possible positioning server as shown in FIG. 6a or 6b. As shown in Figure 7a or Figure 7b A possible terminal device.
  • embodiments of the present application can be provided as a method, system, or computer program product. Therefore, the embodiments of the present application may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Moreover, embodiments of the present application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • computer-usable storage media including but not limited to disk storage, CD-ROM, optical storage, etc.
  • Embodiments of the present application are described with reference to flowchart illustrations and/or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG.
  • These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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Abstract

一种辅助数据传输方法、设备及系统，以解决现有的RTK定位技术需要终端设备上报自身的GPS位置信息，存在安全隐患问题且效率较低的问题，该方法包括：网络设备从定位数据中心获取辅助数据；通过广播的方式向终端设备发送所述辅助数据，所述辅助数据为终端设备用于定位的数据。由于采用广播的方式向终端设备广播辅助数据，避免终端设备上报自身的GPS位置信息，提高了安全性，且提高了效率。

Description

一种辅助数据传输方法、设备及系统 技术领域
本申请涉及通信技术领域，尤其涉及一种辅助数据传输方法、设备及系统。
背景技术
全球定位系统(global positioning system，GPS)是一种高精度的定位导航系统，由于受卫星钟误差，星历误差，电离层误差的影响，该方法所能达到的精度在15米左右，无法满足无人机、智能驾驶或垂直市场等应用场景。而载波相位差分(real time kinematic，RTK)技术的引入可以有效的提高定位精度。
图1所示为现有的利用RTK服务器实现终端设备定位的原理示意图。RTK服务器通过第三方卫星地基参考站获得参考数据，即第三方差分卫星改正数，要做定位的终端设备需要上报自身的GPS位置信息，然后RTK服务器根据接收到的参考数据以及终端设备自身上报的GPS位置信息，计算出RTK改正数，并发送给终端设备，终端设备利用RTK改正数和获得的GPS位置信息计算出高精度的位置。
由此可知，现有的RTK定位技术需要终端设备上报自身的GPS位置信息，存在安全隐患问题，并且RTK服务器将RTK改正数通过单播的方式传递给终端设备，效率较低。
发明内容
本申请实施例提供一种辅助数据传输方法、设备及系统，以解决现有的RTK定位技术需要终端设备上报自身的GPS位置信息，存在安全隐患问题且效率较低的问题。
第一方面，提供一种辅助数据传输方法，包括：
网络设备从定位数据中心获取辅助数据；
所述网络设备通过广播的方式向终端设备发送所述辅助数据，所述辅助数据为终端设备用于定位的数据。
由于网络设备获取到辅助数据后，采用广播的方式向终端设备通知该辅助数据，避免了现有技术中终端上报自身位置信息导致的安全隐患较高的缺陷，采用广播的方式提高了数据传输效率。
结合第一方面，一种可能的设计中，所述网络设备从定位数据中心获取辅助数据，包括：
所述网络设备以分段的方式从所述定位数据中心获取所述辅助数据。
这种设计中，网络设备对辅助数据进行分段传输，可以根据网络设备的资源情况进行数据传输，保证数据传输的前提下，优化系统性能。
结合第一方面，一种可能的设计中，所述网络设备从定位数据中心获取辅助数据，包括：
所述网络设备从定位数据中心获取不同定位精度的辅助数据；或者
所述网络设备从定位数据中心获取对不同定位方法的辅助数据；或者
所述网络设备从定位数据中心获取对不同卫星定位系统的辅助数据。
这种设计中，网络设备区分不同定位精度或定位方法或卫星定位系统传输辅助数据， 更够能从多个维度获取辅助数据，从而能够实现对辅助数据的有效区分。
结合第一方面，一种可能的设计中，所述网络设备从定位数据中心获取辅助数据之前，所述方法还包括：
所述网络设备向所述定位数据中心发送第一消息，所述第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
这种设计中，网络设备通过第一消息指示网络设备可调度的数据包的大小指示信息和/或传输周期指示信息，进一步有助于辅助数据的准确传输。
结合第一方面，一种可能的设计中，所述网络设备从定位数据中心获取辅助数据，包括：
所述网络设备以分段的方式从所述定位数据中心获取所述辅助数据。
这种设计中，网络设备对辅助数据进行分段传输，可以根据网络设备的资源情况进行数据传输，保证数据传输的前提下，优化系统性能。
结合第一方面，一种可能的设计中，所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
所述网络设备对分段后的辅助数据通过不同的系统信息块SIB类型进行广播；或者所述网络设备向所述终端设备设备发送使用同一SIB类型的不同数据包。
结合第一方面，一种可能的设计中，所述方法还包括：
所述网络设备接收到辅助数据后，通过广播的方式向终端设备发送所述辅助数据之前，对所述辅助数据进行分段；
所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
对分段后的辅助数据通过不同的SIB类型进行广播；或者
向所述终端设备设备发送使用同一SIB类型的不同数据包。
这种设计中，网络设备对辅助数据进行分段，可以减轻定位数据中心的负担，提高辅助数据的传输效率。
结合第一方面，一种可能的设计中，所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
所述网络设备向终端设备进行广播的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
所述网络设备向终端设备进行广播的辅助数据的内容包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
这种设计中，网络设备区分不同定位精度或定位方法或卫星定位系统传输辅助数据，更够能从多个维度获取辅助数据，从而能够实现对辅助数据的有效区分。
第二方面，提供一种辅助数据传输方法，包括：
定位数据中心获取辅助数据，所述辅助数据为终端设备用于定位的数据；
所述定位数据中心将所述辅助数据传输至网络设备。
这种设计中，定位数据中心获取到辅助数据后，传输给网络设备，提高辅助数据的传输效率，避免终端上报位置信息，提高安全性。
结合第二方面，一种可能的设计中，所述定位数据中心获取所述辅助数据，包括：
所述定位数据中心从参考站获取所述辅助数据；或者，
所述定位数据中心根据从所述参考站获取的辅助数据计算得出所述辅助数据。
结合第二方面，一种可能的设计中，所述定位数据中心获取所述辅助数据之前，所述方法还包括：
所述定位数据中心接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
这种设计中，定位数据中心根据第一消息传输辅助数据，有利于辅助数据的有效传输，提高传输效率，避免数据丢失。
结合第二方面，一种可能的设计中，所述定位数据中心将所述辅助数据传输至网络设备，包括：
所述定位数据中心将所述辅助数据以分段的方式发送给网络设备。
这种设计中，定位数据中心将辅助数据进行分段传输，防止数据传输确实，提高数据传输安全性。
结合第二方面，一种可能的设计中，所述方法还包括：
所述定位数据中心向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。
结合第二方面，一种可能的设计中，所述定位数据中心将所述辅助数据传输至网络设备，包括：
所述定位数据中心将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
所述定位数据中心将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
所述定位数据中心将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
这种设计中，区分不同定位精度或定位方法或卫星定位系统传输辅助数据，实现了辅助数据的区分传输。
第三方面，提供一种网络设备，包括：
接收模块，用于从定位数据中心获取辅助数据；
发送模块，用于通过广播的方式向终端设备发送所述接收模块获取的所述辅助数据，所述辅助数据为终端设备用于定位的数据。
结合第三方面，一种可能的设计中，所述接收模块具体用于：
以分段的方式从所述定位数据中心获取所述辅助数据。
结合第三方面，一种可能的设计中，所述接收模块从定位数据中心获取辅助数据时，具体用于：
从定位数据中心获取不同定位精度的辅助数据；或者
从定位数据中心获取对不同定位网络设备的辅助数据；或者
从定位数据中心获取对不同卫星定位系统的辅助数据。
结合第三方面，一种可能的设计中，所述发送模块还用于：
在所述接收模块从定位数据中心获取辅助数据之前，向所述定位数据中心发送第一消息，所述第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的 数据包的大小指示信息和/或传输周期指示信息。
结合第三方面，一种可能的设计中，所述接收模块具体用于：
以分段的方式从所述定位数据中心获取所述辅助数据。
结合第三方面，一种可能的设计中，所述发送模块具体用于：
对分段后的辅助数据通过不同的系统信息块SIB类型进行广播；或者向所述终端设备设备发送使用同一SIB类型的不同数据包。
结合第三方面，一种可能的设计中，所述网络设备还包括处理模块，具体用于：
在所述接收模块接收到辅助数据后，所述发送模块向终端设备进行广播之前，对所述辅助数据进行分段；
所述发送模块，具体用于：
对分段后的辅助数据通过不同的SIB类型进行广播；或者
向所述终端设备设备发送使用同一SIB类型的不同数据包。
结合第三方面，一种可能的设计中，所述发送模块通过广播方式向终端设备发送的辅助数据，用于在系统消息中指示每个辅助数据的定位网络设备或者定位精度或者卫星定位系统；或者
包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
另一方面，上述实施例中的处理模块对应的实体设备可以为处理器，发送模块对应的实体设备可以为发射器，接收模块对应的实体设备可以为接收器。
第四方面，提供一种定位服务器，包括：
处理模块，用于获取辅助数据，所述辅助数据为终端设备用于定位的数据；
发送模块，将处理模块获取的所述辅助数据传输至网络设备。
结合第四方面，一种可能的设计中，所述处理模块具体用于：
从参考站获取所述辅助数据；或者，
根据从所述参考站获取的辅助数据计算得出所述辅助数据。
结合第四方面，一种可能的设计中，所述定位服务器还包括接收模块，用于：
在所述处理模块获取所述辅助数据之前，接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
结合第四方面，一种可能的设计中，所述发送模块具体用于：
将所述辅助数据以分段的方式发送给网络设备。
结合第四方面，一种可能的设计中，所述发送模块还用于：
向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。
结合第四方面，一种可能的设计中，所述发送模块在将所述辅助数据传输至网络设备时，具体用于：
将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
另一方面，上述实施例中的处理模块对应的实体设备可以为处理器，发送模块对应的 实体设备可以为发射器。
第五方面，提供一种辅助数据传输方法，包括：
终端设备接收网络设备通过广播的方式发送的辅助数据，所述辅助数据为终端设备用于定位的数据；
所述终端设备利用所述辅助数据进行定位。
这种设计中，终端通过广播的方式获取辅助数据实现自身定位，避免现有技术中的周期性上报位置信息，避免了安全隐患，且通过广播的方式节省了终端设备的功耗。
结合第五方面，一种可能的设计中，所述终端设备接收网络设备通过广播的方式发送的辅助数据，包括：
所述终端设备接收所述网络设备通过不同的系统信息块SIB类型进行广播的分段后的辅助数据；或者接收所述网络设备使用同一SIB类型的不同数据包发送的分段后的辅助数据。
结合第五方面，一种可能的设计中，所述终端设备接收网络设备通过广播的方式发送的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
这种设计中，区分不同定位精度或定位方法或卫星定位系统传输辅助数据，实现了辅助数据的区分传输，终端设备可以获取需要的辅助数据，节省终端设备的功耗。
第六方面，提供一种终端设备，包括：
接收模块，用于接收网络设备通过广播的方式发送的辅助数据，所述辅助数据为终端设备用于定位的数据；
处理模块，用于利用所述辅助数据进行定位。
结合第六方面，一种可能的设计中，所述接收模块具体用于：
接收所述网络设备通过不同的系统信息块SIB类型进行广播的分段后的辅助数据；或者接收所述网络设备使用同一SIB类型的不同数据包发送的分段后的辅助数据。
结合第六方面，一种可能的设计中，所述接收模块接收网络设备通过广播的方式发送的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
另一方面，上述实施例中的处理模块对应的实体设备可以为处理器，接收模块对应的实体设备可以为接收器。
第七方面，提供一种通信系统，包括上述实施例所涉及的网络设备、定位服务器和如终端设备。
第八方面，提供一种计算机存储介质，用于储存为上述网络设备所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
第九方面，提供一种计算机存储介质，用于储存为上述定位数据中心所用的计算机软件指令，其包含用于执行上述方面所设计的程序。
第十方面，提供一种计算机存储介质，用于储存为上述终端设备所用的计算机软件指 令，其包含用于执行上述方面所设计的程序。
附图说明
图1为现有的利用RTK服务器实现终端设备定位的原理示意图；
图2为本申请实施例的网络架构图；
图3为本申请实施例提供的辅助数据传输方法的流程示意图；
图4为本申请实施例提供的辅助数据传输方法的流程示意图；
图5a为本申请实施例网络设备的结构示意图；
图5b为本申请实施例网络设备的硬件结构示意图；
图6a为本申请实施例定位服务器的结构示意图；
图6b为本申请实施例定位服务器的硬件结构示意图；
图7a为本申请实施例终端设备的结构示意图；
图7b为本申请实施例终端设备的硬件结构示意图；
图8为本申请实施例的通信系统结构示意图
具体实施方式
下面将结合本申请实施例中的附图，对本申请实施例中的技术方案进行清楚、完整地描述。
本申请实施例中术语“和/或”，仅仅是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请实施例中的字符“/”，一般表示前后关联对象是一种“或”的关系。
下面结合说明书附图对本申请实施例作进一步详细说明。
应理解，在本申请实施例的辅助数据传输方法适用于长期演进(Long Term Evolution，LTE)系统，如NB-IoT系统；此外，本申请实施例的辅助数据传输方法也可适用于其它无线通信系统，例如全球移动通信系统(Global System for Mobile Communication，GSM)、移动通信系统(Universal Mobile Telecommunications System，UMTS)、码分多址接入(Code Division Multiple Access，CDMA)系统、此外，还可以适用于使用LTE系统后续的演进系统，如第五代5G系统等。
图2所示为本申请实施例的网络架构图，包括终端设备、基站和定位数据中心，具体连接关系可参阅图2所示。
本申请实施例中的基站可用于将收到的空中帧与网际协议(Internet Protocol，IP)分组进行相互转换，作为无线终端设备与接入网的其余部分之间的路由器，其中接入网的其余部分可包括IP网络；此外，本申请实施例中的基站还可协调对空中接口的属性管理。例如，本申请实施例中的基站可以是全球移动通信系统(Global System for Mobile Communication，GSM)或码分多址(Code Division Multiple Access，CDMA)中的基站(Base Transceiver Station，BTS)，也可以是宽带码分多址(Wideband Code Division Multiple Access，WCDMA)中的基站(NodeB)，还可以是LTE中的演进型基站(evolutional Node B，eNB或e-NodeB)，还可以是第五代5G系统中的新基站(new radio，NR)，在本申请实施例中不做限定。
本申请实施例中的终端设备可以为用于向用户提供语音和/或数据连通性的设备、具有无线连接功能的手持式设备、或连接到无线调制解调器的其他处理设备。终端设备还可以为无线终端设备，其中，无线终端设备可以经无线接入网(Radio Access Network，RAN)与一个或多个核心网进行通信，无线终端设备可以是移动终端设备，如移动电话(或称为“蜂窝”电话)、或具有移动终端设备的计算机，例如，具有移动终端设备的计算机可以是便携式、袖珍式、手持式、计算机内置的或者车载的移动装置，它们与无线接入网交换语言和/或数据。例如，无线终端设备还可以为个人通信业务(Personal Communication Service，PCS)电话、无绳电话、会话发起协议(Session Initiation Protocol，SIP)话机、无线本地环路(Wireless Local Loop，WLL)站、个人数字助理(Personal Digital Assistant，PDA)等设备。无线终端设备也可以称为系统、订户单元(Subscriber Unit)、订户站(Subscriber Station)，移动站(Mobile Station)、移动台(Mobile)、远程站(Remote Station)、接入点(Access Point)、远程终端设备(Remote Terminal)、接入终端设备(Access Terminal)、用户终端设备(User Terminal)、用户代理(User Agent)、用户设备(User Device)、或用户装备(User Equipment，UE)等。
本申请实施例所涉及的定位数据中心，可以包括定位服务器，如演进的服务移动位置中心(Evolved Serving Mobile Location Center，E-SMLC)、网关移动位置中心(Gateway Mobile Location Center，G-MLC)，RTK服务器(也可称为控制中心，计算中心)等其他服务器，RTK服务器或者控制中心是用于计算改正数的服务器。其中，定位服务器和RTK服务器可以是单独的两个实体，也可以是集成在一起。定位服务器和RTK服务器之间可以定义一个需要标准化的接口，也可是私有接口，本申请中将定位服务器和RTK服务器看作为集成在一起的实体，在此简称为定位数据中心，也就是说如果这两个服务器是单独两个实体或者两者之间有一个新定义的接口，则进行数据传输时，数据发送时是RTK服务器向定位服务器发送数据，定位服务器向基站发送数据；数据接收时则为相反的过程。
本申请实施例所涉及的网络设备，可以是基站，或者接入点，或者可以是指接入网中在空中接口上通过一个或多个扇区与无线终端通信的设备。基站可用于将收到的空中帧与IP分组进行相互转换，作为无线终端与接入网的其余部分之间的路由器，其中接入网的其余部分可包括网际协议(IP)网络。基站还可协调对空中接口的属性管理。例如，基站可以是GSM或CDMA中的基站(BTS，Base Transceiver Station)，也可以是WCDMA中的基站(NodeB)，还可以是LTE中的演进型基站(eNB或e-NodeB，evolutional Node B)，本申请并不限定。
为了表述方便，本申请实施例中的网络设备以基站为例进行说明，这仅是本申请实施例所举的例子，本发明包括并不限于此。
在本申请实施例中网络设备从定位数据中心接收辅助数据；并向终端设备进行广播，所述辅助数据为终端设备用于定位的数据，由于避免了终端设备定期上报自身的位置信息，因此在一定程度上降低了终端设备的安全隐患，由于采取广播的方式向终端设备发送辅助数据，提高了辅助数据的传输效率提高了终端设备中电池的寿命。
本申请实施例提供一种辅助数据传输方法、设备及系统，以解决现有的RTK定位技术和现有蜂窝网络结合如何进行数据传输的问题。其中，方法和装置是基于同一发明构思的，由于方法及装置解决问题的原理相似，因此装置与方法的实施可以相互参见，重复之处不再赘述。
图3示出了本申请实施例提供的辅助数据传输方法的流程示意图，该流程具体可通过硬件、软件编程或软硬件的结合来实现。
其中，用以执行本申请实施例所提供的辅助数据传输方案的功能模块具体可以通过硬件、软件编程以及软硬件的组合来实现，硬件可包括一个或多个信号处理和/或专用集成电路。
如图3所示，该流程具体包括有以下处理过程：
步骤31：定位数据中心获取辅助数据，所述辅助数据为终端设备用于定位使用的数据。
需要说明的是，所述辅助数据可以包括下述数据的至少一种：参考站位置信息、参考站原始测量值或改正数、RTK数据、实时伪距差分(real-time kinematic pesudorange difference,RTD)数据、电离层数据、星历数据等其他数据、定位数据中心计算出的改正数、以及其他一些蜂窝定位方法的辅助数据，如到达时间观测时间差(Observed Time Difference Of Arrival,OTDOA)辅助数据。
具体的，所述定位数据中心获取所述辅助数据时，可以通过以下过程获取：
S1：所述定位数据中心从参考站获取参考数据。
S2：根据所述参考数据和网络设备的位置信息计算得出的数据。
S3：定位数据中心根据目标网络设备位置产生的数据。
可选的，在步骤31执行之前，所述方法还包括步骤30：所述定位数据中心接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据。
其中，第一消息可以是LTE定位协议A(LTE Positioning Protocol Annex，LPPA)消息，第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。例如，该第一消息可包括的内容有可调度的SIB数据包的大小，即SIB的传输块大小(transport block size，TBS)或SIB传输块大小的上限，系统消息(system information SI)周期或系统消息传输间隔,可以是网络设备打算传输的SI周期或系统消息传输间隔，也可以是网络设备支持的一个或多个SI周期或系统消息传输间隔。
步骤32：网络设备从定位数据中心获取辅助数据。
具体的，定位数据中心在传输辅助数据时，可以通过第二消息将辅助数据发送给网络设备。第二消息可以是LPPA消息，该第二消息可以为辅助数据应答消息，或者辅助数据提供消息。
其中，改正数的传输频率可以认为1HZ，且实验中，通常数据包大小每秒在1-2Kbyte左右，因此，具体的，定位数据中心可以根据网络设备支持的SIB传输块大小，或者SIB传输块的上限，将大的数据包进行分段传输，即根据SIB传输块的大小对所述辅助数据进行分段传输。
因此定位数据中心在向网络设备发送第二消息时，可以携带每个分段后的辅助数据的包序号，以及指示这个数据包是否为最后一个数据包等。
可选的，定位数据中心向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。例如，可以根据辅助数据所分的段数向网络设备发送一个SI周期或系统消息传输间隔，以使得网络设备能及时的将辅助数据进行广播，如1秒内传输完成。
例如，定位数据中心在某一时刻获取的辅助数据的数据包较大时，如软件升级场景，则可以通知网络设备使用较小的SI传输周期来传输。如携带一个较小的SI周期或系统消 息传输间隔，或者一个指示信息用于指示网络设备使用小的SI周期或系统消息传输间隔，以使得网络设备能及时将大的数据包进行广播。
具体的，定位数据中心向网络设备发送辅助数据可以每次以允许在一个SIB块传输的数据的大小进行发送数据包，此时第二消息的消息格式可参阅表1所示，也可以使用一个列表将拆分后的包以列表形式发送给网络设备，此时第二消息的消息格式可参阅表2所示。
表1
Figure PCTCN2017083355-appb-000001
表2
IE/组名称(Group Name)
消息类型(Message Type)
LPPA事务/流程标识(Transaction ID)
辅助数据列表(Assistant Data List)
进一步的，若辅助数据的数据包较小，则不需要对辅助数据进行分段拆包，可以直接发送给网络设备。
具体的，所述定位数据中心将所述辅助数据传输至网络设备时，可以包括以下情形：
情形一：所述定位数据中心将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备。
情形二：所述定位数据中心将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备。
定位数据中心将辅助数据发送给网络设备时，可以区分不同的定位精度和定位方法。不同的定位精度也对应不同的定位方法，如RTD方法可以得到亚米级别的定位精度，RTK方法可以达到厘米级别的定义精度，还可以有其他的定位方法，如位置差分，伪距差分，相位平滑等伪距差分，载波相位差分，局域差分GPS，广域差分GPS，虚拟参考站技术(virtual reference station，VRS)网络RTK，媒体接入控制(Medium Access Control，MAC)网络RTK，区域改正参数(Area correction parameters，FKP)网络RTK，网络伪距相位差分(Real Time DGPS,RTD)方法等定位方法，这些定位方法不同，对应的定位精度可能也不同，因此定位数据中心在发送辅助数据给网络设备时需要区分发送，例如使用不同的消息进行发送，例如使用一个消息的不同字段进行发送。
表3示出了一个传输辅助数据的LPPA消息使用不同字段区分网络RTD和网络RTK的例子。
表3
IE/组名称(Group Name)
消息类型(Message Type)
LPPA事务/流程标识(Transaction ID)
RTD辅助数据(Assistant Data)
RTK辅助数据(Assistant Data)
情形三：所述定位数据中心将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
定位数据中心将辅助数据发送给网络设备时，可以区分不同的卫星定位系统，现有的卫星定位系统有，美国的GPS、俄罗斯的Glonass、欧洲的Galileo、中国的北斗卫星导航系统，以及相关的增强系统，如美国的WAAS(广域增强系统)、欧洲的EGNOS(欧洲静地导航重叠系统)和日本的MSAS(多功能运输卫星增强系统)等。
上述不同精度或者不同定位方法或者不同卫星导航系统区分后，也同样可以使用上述分段传输的方法，如对某个定位方法或者某个定位导航系统的数据进行分段，保证可以通过系统消息传输。
具体的，所述网络设备从定位数据中心接收辅助数据时，包括以下两种可能的实施方式：
第一种可能的实施方式中，所述网络设备以分段的方式从所述定位数据中心获取所述辅助数据。
第二种可能的实施方式中，所述网络设备接收到辅助数据后，对所述辅助数据进行分段，这种情况是定位数据中心并未将大数据分段，而是由网络设备进行分段。此方式还包括两种方式：
1)网络设备不可读定位辅助数据，根据系统消息资源块大小进行分段，这种情况可能出现对某个RTCM消息进行截断，使得终端设备获取数据时不能获得最后一个RTCM的完整的消息。
2)网络设备可以读取定位辅助数据信息，在根据资源调度数据的同时也保证数据不被截断。
在上述可能的实施方式中，所述网络设备从定位数据中心接收辅助数据，包括：
所述网络设备从定位数据中心获取不同定位精度的辅助数据；或者从定位数据中心获取对不同定位方法的辅助数据；或者从定位数据中心获取对不同卫星定位系统的辅助数据。即定位数据中心通过区分不同的定位精度或者定位方法或者卫星定位系统发送给网络设备。网络设备再进行进一步分段处理。
步骤33：所述网络设备向终端设备进行广播所述辅助数据。
具体的，所述网络设备向终端设备进行广播时，可以包括以下两种方式：
方式一：所述网络设备对分段后的辅助数据通过不同的SIB类型进行广播。
当网络设备接收到分段后的辅助数据后，可以将不同的分段的辅助数据使用不同的SIB类型进行广播，如SIBX，SIBY，X，Y是一个正整数，区分不同SIB类型，如LTE中的SIB1，SIB2。
进一步的，可以使用不同的SIB类型来传输不同的定位精度，定位方法或者卫星定位系统的辅助数据，如SIBX广播RTK数据，SIBY广播RTD数据。
方式二：所述网络设备对分段后的辅助数据向所述终端设备发送时使用同一SIB类型的不同数据包。
这里同一SIB类型的数据包，例如同一SIB类型的数据包是SIB5，具有某个传输的SI周期，也就是每个SI周期都进行广播SIB5，这里的每一次SI周期广播的SIB5，就是属于SIB5的不同数据包。因此同一类型的数据包表示为每个传输周期或者传输间隔广播的数据包。
可选的，这里的同一类型的数据包，也可以网络设备设置的一个传输间隔，将该SIB以该传输间隔进行发送的数据包。
进一步的，网络设备在广播这些辅助数据时(使用不同的SIB类型或者使用同一SIB类型的不同数据包进行广播)，可理解为用于传输辅助数据的系统消息与其他SIB类型不同，每个SI周期或者传输间隔传输的数据都是不同的，因此该系统消息(SIB)的变化不影响SIB1中值标签(value tag)的变化，也不受更改周期的影响。
进一步的，所述网络设备向终端设备进行广播的内容包括在系统消息中通过字段或者信元指示每个辅助数据的定位方法或者定位精度或者卫星定位系统，可以在同一SIB类型的数据包里进行区分指示，也可以在不同SIB类型的SIB中进行指示；或者所述网络设备向终端设备进行广播的内容包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
例如，由于辅助数据的内容不同，将不同内容的数据通过一个SIB块(数据包)进行广播，可以在系统消息中不同的字段或IE指示不同的辅助数据的定位方法或者定位精度或者卫星定位系统，如使用不同的字段指示是哪种定位系统或者定位方法等等。若使用同一SIB类型的不同SIB块(数据包)进行辅助数据传输或者使用不同SIB类型进行广播时，则可以在SIB1中进行指示具体哪些某个SIB类型的哪个SIB块或者SIB类型传输的哪种定位方法或者定位精度或者卫星定位系统的辅助数据，如指示某个SIB块或者SIB类型传输的是RTD数据，有的传输是RTK数据。
或者在某一SIB类型的每个SIB块(数据包)中指示这是第几个SIB块(数据包)，这个SIB块传输的是哪种定位方法的数据，这次数据传输共分成几个SIB块，传输不同定位精度或定位方法或卫星定位系统的SIB块是哪几个等等，也就是说通过每个数据包的包序号来指示对应的序号包发送的是哪种数据。具体的，若定位数据中心或者网络设备将一个大的辅助数据拆分成n个包，n为正整数，则在每个包中指示所有包的序号对应的数据类型，数据类型根据定位方法或定位精度或卫星定位系统或不同周期的数据进行区分。这样终端设备读取其中一个包，则可知后面几个包中哪个包是该终端设备需要的。
这里的SIB块指的是同一SIB类型发送的不同的数据包，如每个SI传输周期或传输间隔该SIB发送的数据包(MAC PDU)。通常在LTE中SIB在修改周期内每个SI周期发送的内容是相同的，这里相当于每个SI周期广播的内容是不同的，即每个SI传输周期发送一个数据包或SIB块，将这些数据包或SIB块进行标号则可以知道是第几个数据包或数据块。这里的包序号是由分段发送前一个大包拆分时进行排序标号的，对于不同的分段前的大包，拆包后可以独立的进行编号，也可以进行累计标号直到达到允许的最大值，再从0或者1开始标号。
还有一种可能的方式是，公共的部分辅助数据放在一个SIB块或者某个SIB类型中，如SIBX，其他不同方法的不同辅助数据分开传输，如使用不同的SIB块或者不同的SIB类型。 公共部分可能是电离层，对流层的数据等大周期变化的数据，可以把他们单独放在一个SIB里，只有变更时UE才需要读，这类数据可以有一个单独的value tag和/或变更周期，终端设备只在发现其变更时才需要读取。
这样，当终端设备接收到所有辅助数据后，可以根据自己支持的定位方法或者定位精度或者卫星定位系统来解调数据或者使用相应的密钥来获取信息。
对使用同一SIB类型的不同数据包，具体的将辅助数据的大包拆分成多个小包后，每个包有自己的包序号，网络设备在广播这些小的数据包时，可以在将大包拆分的所有的数据包的包序号或者索引值广播，并相应的广播哪些序号对应哪种定位精度或者定位方法或者卫星定位系统。
如，将一个大包拆分了5个小包，则在每个包中都进行广播序号1，2，3，4，5，并指示1，2，3是GPS，4，5是GLONASS。这样如果终端设备接受GPS系统时，当读到第一个包时，就知道只有1，2，3包是需要读取的数据，后面两个包就不需要再读取了，其他定位精度的定位方法类似。
进一步的，当网络设备的资源受限时，即该网络设备可调度的SIB传输块大小或者上限发生变化时，网络设备发第三消息通知定位数据中心，所述第三消息中携带新的可调度的数据包的大小指示信息，可以为SIB的传输块大小或上限，或者若不能发送时通知定位数据中心。
下面通过几个实施例来具体说明上述方法。
实施例一
定位数据中心将辅助数据发送给网络设备时，可以区分不同的定位精度或定位方法或卫星定位系统。不同的定位精度也对应不同的定位方法，如RTD方法可以得到亚米级别的定位精度，RTK方法可以达到厘米级别的定位精度。还可以有其他的定位方法，因此定位数据中心在发送辅助数据给网络设备时需要区分发送，例如使用不同的消息进行发送或者使用一个消息不同的字段进行发送。
定位数据中心发送给网络设备的数据在区分不同定位精度或定位方法或者卫星定位系统后，每一部分的数据量可能依然很大超过SIB广播的数据的大小，则需要进行上文所述的分段，如将不同精度的数据进行分段，不同定位方法的数据进行分段，不同卫星定位导航系统进行分段，一个示例如表4和表5所示：
表4
IE/组名称(Group Name)
消息类型(Message Type)
LPPA事务/流程标识(Transaction ID)
分段后的RTD辅助数据(Assistant Data)
分段后的RTK辅助数据(Assistant Data)
表5
IE/组名称(Group Name)
消息类型(Message Type)
LPPA事务/流程标识(Transaction ID)
RTD辅助数据列表(Assistant Datalist)
RTK辅助数据列表(Assistant Datalist)
即定位数据中心向网络设备发送的LPPA消息，可以是每种类型数据的一个分段传输或每次只发送该数据类型的一个数据包，也可是由一个数据列表来传输，将多个分段后的数据包进行一起发送给网络设备。如果每次传一个分段或数据包，则需要传输多条消息将某个类型的数据传输完成。
进一步的，步骤42中所述网络设备接收到第二消息后，向终端设备进行广播的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位导航系统；或者所述网络设备向终端设备进行广播的内容包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度，具体指示如上文所示。
定位数据中心对不同定位精度或定位方法的辅助数据的分段发送方式同实施例一一致，在此不再赘述。
实施例二
图4以网络设备对辅助数据进行分段为例示出了网络设备和定位数据中心的交互流程。
步骤40：网络设备向定位数据中心发送用于请求获取辅助数据的的第一消息，可选的，步骤40也可以不执行。
步骤41：定位数据中心将辅助数据发送给网络设备。
步骤42：网络设备针对所述辅助数据进行分段拆包，并向终端设备广播。
可选的，如果网络设备可读辅助数据，则定位数据中心发送的辅助数据给网络设备时，则可以不用进行分段。网络设备在广播时，可以区分不同的定位精度或者不同的定位方法或者不同的卫星定位系统或者不同周期的辅助数据。具体的，可以通过SIB1进行调度进行指示不同类型定位数据的传输，也可以在传输定位辅助数据的SIB中进行指示。可以使用不同的SIB类型，也可以使用同一SIB类型的不同数据包进行传输。
可选的，定位数据中心也可以指示不同的定位精度或定位方法或卫星定位系统的辅助数据，可选的，定位数据中心通过LPPA消息进行指示并发送给网络设备，由网络设备进行将辅助数据进行分段处理。
具体的定位数据中心或者网络设备进行将数据依照数据类型进行区分，所述数据类型包括不同定位精度，方法，卫星定位导航系统，但不限于这几种分类。
其次，若定位服务器，如E-SMLC和RTK服务器(控制中心)若不是一个实体，则由RTK服务器获取辅助数据在发送给定位服务器，如E-SMLC。但E-SMLC到UE之间辅助数据传输流程可以使用上述实施例方法，具体的分段识别实体则可以为RTK服务器，E-SMLC以及网络设备，如果是RTK服务器，则RTK服务器分段后传输给E-SMLC，E-SMLC通过LPPA消息发送给网络设备，网络设备通过广播发送给终端设备，具体的分段传输和广播方法可采用上述实施例方法。
具体的，网络设备根据自身的资源调度情况进行辅助数据的拆包。每个包里也可以包含包序号，以及指示某个SIB传输块是哪个定位精度或者定位方法或者卫星定位系统等，与上述实施例类似，在此不再赘述。
于同一构思，本申请实施例中还提供了一种网络设备，该网络设备用于执行上述方法实施例中网络设备的动作或功能。
基于同一构思，本申请实施例中还提供了一种定位服务器，该定位服务器用于执行上述方法实施例中的定位数据中心的动作或功能。
基于同一构思，本申请实施例中还提供了一种终端设备，该终端设备用于执行上述方法实施例中的终端设备的动作或功能。
本发明实施例还提供一种通信系统，包括上述实施例中的网络设备、定位服务器与终端设备。
为了节省篇幅，装置部分的内容可以具体能见方法实施例，重复之处不再赘述。
如图5a所示，本申请实施例中的网络设备500a，包括：接收模块510a和发送模块520a，其中：接收模块510a，用于从定位数据中心获取辅助数据；发送模块520a，用于通过广播的方式向终端设备发送所述接收模块510a获取的所述辅助数据，所述辅助数据为终端设备用于定位的数据。
可选的，所述接收模块510a具体用于：
以分段的方式从所述定位数据中心获取所述辅助数据。
可选的，所述接收模块510a从定位数据中心获取辅助数据时，具体用于：
从定位数据中心获取不同定位精度的辅助数据；或者
从定位数据中心获取对不同定位网络设备的辅助数据；或者
从定位数据中心获取对不同卫星定位系统的辅助数据。
可选的，所述发送模块520a还用于：
在所述接收模块510a从定位数据中心获取辅助数据之前，向所述定位数据中心发送第一消息，所述第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
可选的，所述接收模块510a具体用于：
以分段的方式从所述定位数据中心获取所述辅助数据。
可选的，所述发送模块520a具体用于：
对分段后的辅助数据通过不同的系统信息块SIB类型进行广播；或者向所述终端设备设备发送使用同一SIB类型的不同数据包。
可选的，所述网络设备还包括处理模块530a，具体用于：
在所述接收模块510a接收到辅助数据后，所述发送模块520a向终端设备进行广播之前，对所述辅助数据进行分段；
所述发送模块520a，具体用于：
对分段后的辅助数据通过不同的SIB类型进行广播；或者
向所述终端设备设备发送使用同一SIB类型的不同数据包。
可选的，所述发送模块520a通过广播方式向终端设备发送的辅助数据，用于在系统消息中指示每个辅助数据的定位网络设备或者定位精度或者卫星定位系统；或者包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
应注意，本申请实施例中，处理模块530a可以由处理器实现，发送模块520a可以由收发器实现。图5b所示，网络设备500b可以包括处理器510b、收发器520b和存储器530b。其中，存储器530b可以用于存储网络设备500b出厂时预装的程序/代码，也可以存储用于处理器510b执行时的代码等。
其中，处理器510b可以采用通用的中央处理器(Central Processing Unit，CPU)，微处理器，应用专用集成电路(Application Specific Integrated Circuit，ASIC)，或者一个或多个集成电路，用于执行相关操作，以实现本申请实施例所提供的技术方案。
应注意，尽管图5b所示的网络设备500b仅仅示出了处理器510b、收发器520b和存储器530b，但是在具体实现过程中，本领域的技术人员应当明白，该网络设备500b还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，该网络设备500b还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，该网络设备500b也可仅仅包含实现本申请实施例所必须的器件或模块，而不必包含图5b中所示的全部器件。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁盘、光盘、只读存储记忆体(Read-Only Memory，ROM)或随机存储记忆体(Random Access Memory，RAM)等。
如图6a所示，本申请实施例的定位服务器600a，包括处理模块610a和发送模块620a，其中，处理模块610a，用于获取辅助数据，所述辅助数据为终端设备用于定位的数据；发送模块620a，将处理模块610a获取的所述辅助数据传输至网络设备。
可选的，所述处理模块610a具体用于：
从参考站获取所述辅助数据；或者，
根据从所述参考站获取的辅助数据计算得出所述辅助数据。
可选的，所述定位服务器还包括接收模块630a，用于：
在所述处理模块610a获取所述辅助数据之前，接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
可选的，所述发送模块620a具体用于：
将所述辅助数据以分段的方式发送给网络设备。
可选的，所述发送模块620a还用于：
向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。
可选的，所述发送模块620a在将所述辅助数据传输至网络设备时，具体用于：
将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
应注意，本申请实施例中，处理模块610a可以由处理器实现，发送模块620a可以由收发器实现。如图6b所示，定位服务器600b可以包括处理器610b、收发器620b和存储器630b。其中，存储器630b可以用于存储定位服务器600b出厂时预装的程序/代码，也可以存储用于处理器610b执行时的代码等。
其中，处理器610b可以采用通用的CPU，微处理器，ASIC，或者一个或多个集成电路，用于执行相关操作，以实现本申请实施例所提供的技术方案。
应注意，尽管图6b所示的定位服务器600b仅仅示出了处理器610b、收发器620b和 存储器630b，但是在具体实现过程中，本领域的技术人员应当明白，该定位服务器600b还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，该定位服务器600b还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，该定位服务器600b也可仅仅包含实现本申请实施例所必须的器件或模块，而不必包含图6b中所示的全部器件。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁盘、光盘、ROM或RAM等。
如图7a所示，本申请实施例的终端设备700a，包括：接收模块720a和处理模块710a，其中，接收模块720a，用于接收网络设备通过广播的方式发送的辅助数据，所述辅助数据为终端设备用于定位的数据；
处理模块710a，用于利用所述辅助数据进行定位。
可选的，所述接收模块720a具体用于：
接收所述网络设备通过不同的系统信息块SIB类型进行广播的分段后的辅助数据；或者接收所述网络设备使用同一SIB类型的不同数据包发送的分段后的辅助数据。
可选的，所述接收模块720a接收网络设备通过广播的方式发送的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
其中，本申请实施例的终端设备700a所有可能的实现方式参见本申请实施例中终端设备的所有可能的实现方式。
应注意，本申请实施例中，处理模块710a可以由处理器实现，接收模块720a可以由收发器实现。如图7b所示，终端设备700b可以包括处理器710b、收发器720b和存储器730b。其中，存储器730b可以用于存储终端设备700b出厂时预装的程序/代码，也可以存储用于处理器710b执行时的代码等。
其中，处理器710b可以采用通用的CPU，微处理器，ASIC，或者一个或多个集成电路，用于执行相关操作，以实现本申请实施例所提供的技术方案。
应注意，尽管图7b所示的终端设备700b仅仅示出了处理器710b、收发器720b和存储器730b，但是在具体实现过程中，本领域的技术人员应当明白，该终端设备700b还包含实现正常运行所必须的其他器件。同时，根据具体需要，本领域的技术人员应当明白，该终端设备700b还可包含实现其他附加功能的硬件器件。此外，本领域的技术人员应当明白，该终端设备700b也可仅仅包含实现本申请实施例所必须的器件或模块，而不必包含图7b中所示的全部器件。
本领域普通技术人员可以理解实现上述实施例方法中的全部或部分流程，是可以通过计算机程序来指令相关的硬件来完成，上述的程序可存储于一计算机可读取存储介质中，该程序在执行时，可包括如上述各方法的实施例的流程。其中，上述的存储介质可为磁盘、光盘、ROM或RAM等。
如图8所示，本申请实施例的通信系统810，包括如图5a或图5b所示的任一种可能的网络设备和如图6a或图6b所示的任一种可能的定位服务器和如图7a或图7b所示的任 一种可能的终端设备。
本领域内的技术人员应明白，本申请实施例可提供为方法、系统、或计算机程序产品。因此，本申请实施例可采用完全硬件实施例、完全软件实施例、或结合软件和硬件方面的实施例的形式。而且，本申请实施例可采用在一个或多个其中包含有计算机可用程序代码的计算机可用存储介质(包括但不限于磁盘存储器、CD-ROM、光学存储器等)上实施的计算机程序产品的形式。
本申请实施例是参照根据本申请实施例的方法、设备(系统)、和计算机程序产品的流程图和/或方框图来描述的。应理解可由计算机程序指令实现流程图和/或方框图中的每一流程和/或方框、以及流程图和/或方框图中的流程和/或方框的结合。可提供这些计算机程序指令到通用计算机、专用计算机、嵌入式处理机或其他可编程数据处理设备的处理器以产生一个机器，使得通过计算机或其他可编程数据处理设备的处理器执行的指令产生用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的装置。
这些计算机程序指令也可存储在能引导计算机或其他可编程数据处理设备以特定方式工作的计算机可读存储器中，使得存储在该计算机可读存储器中的指令产生包括指令装置的制造品，该指令装置实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能。
这些计算机程序指令也可装载到计算机或其他可编程数据处理设备上，使得在计算机或其他可编程设备上执行一系列操作步骤以产生计算机实现的处理，从而在计算机或其他可编程设备上执行的指令提供用于实现在流程图一个流程或多个流程和/或方框图一个方框或多个方框中指定的功能的步骤。
显然，本领域的技术人员可以对本申请实施例进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请实施例的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。

Claims (35)

  1. 一种辅助数据传输方法，其特征在于，包括：
    网络设备从定位数据中心获取辅助数据；
    所述网络设备通过广播的方式向终端设备发送所述辅助数据，所述辅助数据为终端设备用于定位的数据。
  2. 如权利要求1所述的方法，其特征在于，所述网络设备从定位数据中心获取辅助数据，包括：
    所述网络设备以分段的方式从所述定位数据中心获取所述辅助数据。
  3. 如权利要求2所述的方法，其特征在于，所述网络设备从定位数据中心获取辅助数据，包括：
    所述网络设备从定位数据中心获取不同定位精度的辅助数据；或者
    所述网络设备从定位数据中心获取对不同定位方法的辅助数据；或者
    所述网络设备从定位数据中心获取对不同卫星定位系统的辅助数据。
  4. 如权利要求1所述的方法，其特征在于，所述网络设备从定位数据中心获取辅助数据之前，所述方法还包括：
    所述网络设备向所述定位数据中心发送第一消息，所述第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
  5. 如权利要求4所述的方法，其特征在于，所述网络设备从定位数据中心获取辅助数据，包括：
    所述网络设备以分段的方式从所述定位数据中心获取所述辅助数据。
  6. 如权利要求2、3或5所述的方法，其特征在于，所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
    所述网络设备对分段后的辅助数据通过不同的系统信息块SIB类型进行广播；或者所述网络设备向所述终端设备设备发送使用同一SIB类型的不同数据包。
  7. 如权利要求1所述的方法，其特征在于，所述方法还包括：
    所述网络设备接收到辅助数据后，通过广播的方式向终端设备发送所述辅助数据之前，对所述辅助数据进行分段；
    所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
    对分段后的辅助数据通过不同的SIB类型进行广播；或者
    向所述终端设备设备发送使用同一SIB类型的不同数据包。
  8. 如权利要求1-7任一项所述的方法，其特征在于，所述网络设备通过广播的方式向终端设备发送所述辅助数据，包括：
    所述网络设备向终端设备进行广播的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
    所述网络设备向终端设备进行广播的辅助数据的内容包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
  9. 一种辅助数据传输方法，其特征在于，包括：
    定位数据中心获取辅助数据，所述辅助数据为终端设备用于定位的数据；
    所述定位数据中心将所述辅助数据传输至网络设备。
  10. 如权利要求9所述的方法，其特征在于，所述定位数据中心获取所述辅助数据，包括：
    所述定位数据中心从参考站获取所述辅助数据；或者，
    所述定位数据中心根据从所述参考站获取的辅助数据计算得出所述辅助数据。
  11. 如权利要求9所述的方法，其特征在于，所述定位数据中心获取所述辅助数据之前，所述方法还包括：
    所述定位数据中心接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
  12. 如权利要求9-11任一项所述的方法，其特征在于，所述定位数据中心将所述辅助数据传输至网络设备，包括：
    所述定位数据中心将所述辅助数据以分段的方式发送给网络设备。
  13. 如权利要求9所述的方法，其特征在于，所述方法还包括：
    所述定位数据中心向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。
  14. 如权利要求9-13任一项所述的方法，其特征在于，所述定位数据中心将所述辅助数据传输至网络设备，包括：
    所述定位数据中心将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
    所述定位数据中心将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
    所述定位数据中心将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
  15. 一种网络设备，其特征在于，包括：
    接收模块，用于从定位数据中心获取辅助数据；
    发送模块，用于通过广播的方式向终端设备发送所述接收模块获取的所述辅助数据，所述辅助数据为终端设备用于定位的数据。
  16. 如权利要求15所述的网络设备，其特征在于，所述接收模块具体用于：
    以分段的方式从所述定位数据中心获取所述辅助数据。
  17. 如权利要求16所述的网络设备，其特征在于，所述接收模块从定位数据中心获取辅助数据时，具体用于：
    从定位数据中心获取不同定位精度的辅助数据；或者
    从定位数据中心获取对不同定位网络设备的辅助数据；或者
    从定位数据中心获取对不同卫星定位系统的辅助数据。
  18. 如权利要求15所述的网络设备，其特征在于，所述发送模块还用于：
    在所述接收模块从定位数据中心获取辅助数据之前，向所述定位数据中心发送第一消息，所述第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
  19. 如权利要求18所述的网络设备，其特征在于，所述接收模块具体用于：
    以分段的方式从所述定位数据中心获取所述辅助数据。
  20. 如权利要求16、17或19所述的网络设备，其特征在于，所述发送模块具体用于：
    对分段后的辅助数据通过不同的系统信息块SIB类型进行广播；或者向所述终端设备设备发送使用同一SIB类型的不同数据包。
  21. 如权利要求15所述的网络设备，其特征在于，所述网络设备还包括处理模块，具体用于：
    在所述接收模块接收到辅助数据后，所述发送模块向终端设备进行广播之前，对所述辅助数据进行分段；
    所述发送模块，具体用于：
    对分段后的辅助数据通过不同的SIB类型进行广播；或者
    向所述终端设备设备发送使用同一SIB类型的不同数据包。
  22. 如权利要求15-21任一项所述的网络设备，其特征在于，所述发送模块通过广播方式向终端设备发送的辅助数据，用于在系统消息中指示每个辅助数据的定位网络设备或者定位精度或者卫星定位系统；或者
    包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
  23. 一种定位服务器，其特征在于，包括：
    处理模块，用于获取辅助数据，所述辅助数据为终端设备用于定位的数据；
    发送模块，将处理模块获取的所述辅助数据传输至网络设备。
  24. 如权利要求23所述的定位服务器，其特征在于，所述处理模块具体用于：
    从参考站获取所述辅助数据；或者，
    根据从所述参考站获取的辅助数据计算得出所述辅助数据。
  25. 如权利要求23所述的定位服务器，其特征在于，所述定位服务器还包括接收模块，用于：
    在所述处理模块获取所述辅助数据之前，接收所述网络设备发送的第一消息，该第一消息用于请求获取所述辅助数据，所述第一消息包括所述网络设备可调度的数据包的大小指示信息和/或传输周期指示信息。
  26. 如权利要求23-25任一项所述的定位服务器，其特征在于，所述发送模块具体用于：
    将所述辅助数据以分段的方式发送给网络设备。
  27. 如权利要求23所述的定位服务器，其特征在于，所述发送模块还用于：
    向所述网络设备发送系统消息周期指示信息，指示所述网络设备采用的系统消息传输周期。
  28. 如权利要求23-27任一项所述的定位服务器，其特征在于，所述发送模块在将所述辅助数据传输至网络设备时，具体用于：
    将不同定位精度的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
    将不同定位方法的辅助数据，以不同字段或者以不同的消息传输至网络设备；或者
    将不同卫星定位系统的辅助数据，以不同字段或者以不同的消息传输至网络设备。
  29. 一种辅助数据传输方法，其特征在于，包括：
    终端设备接收网络设备通过广播的方式发送的辅助数据，所述辅助数据为终端设备用 于定位的数据；
    所述终端设备利用所述辅助数据进行定位。
  30. 如权利要求29所述的方法，其特征在于，所述终端设备接收网络设备通过广播的方式发送的辅助数据，包括：
    所述终端设备接收所述网络设备通过不同的系统信息块SIB类型进行广播的分段后的辅助数据；或者接收所述网络设备使用同一SIB类型的不同数据包发送的分段后的辅助数据。
  31. 如权利要求29所述的方法，其特征在于，所述终端设备接收网络设备通过广播的方式发送的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
    包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
  32. 一种终端设备，其特征在于，包括：
    接收模块，用于接收网络设备通过广播的方式发送的辅助数据，所述辅助数据为终端设备用于定位的数据；
    处理模块，用于利用所述辅助数据进行定位。
  33. 如权利要求32所述的终端设备，其特征在于，所述接收模块具体用于：
    接收所述网络设备通过不同的系统信息块SIB类型进行广播的分段后的辅助数据；或者接收所述网络设备使用同一SIB类型的不同数据包发送的分段后的辅助数据。
  34. 如权利要求32所述的终端设备，其特征在于，所述接收模块接收网络设备通过广播的方式发送的辅助数据的内容包括在系统消息中指示每个辅助数据的定位方法或者定位精度或者卫星定位系统；或者
    包括在同一SIB类型的不同数据包中，根据包序号指示每个辅助数据的定位方法或定位精度或定位卫星定位系统。
  35. 一种通信系统，其特征在于，包括如权利要求15至22任一所述的网络设备、如权利要求23至28任一所述的定位服务器和如权利要求32至34任一所述的终端设备。
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