WO2011020375A1 - Method for location processing during terminal handoff and enhanced serving mobile location center in long term evolution network - Google Patents

Abstract

The present invention provides a method for location processing during terminal handoff and an enhanced serving mobile location center in the long term evolution network. The method includes: long term evolution positioning protocol data units are transmitted to the Enhanced-Serving Mobile Location Center (E-SMLC) when a handoff occurs to a terminal during the location service processing, and the information which the location service needs is beared on said long term evolution positioning protocol data units; and when the E-SMLC received the long term evolution positioning protocol data units, said location service is processed according to the information which the location service needs. The method for location processing during terminal handoff and the E-SMLC, for the User Equipment (UE) or the UE-assisted location service, enable the E-SMLC to know the location progresses timely during the handoff process through the Long Term Evolution (LTE) Positioning Protocol (LPP) or the LTE Positioning Protocol Annex (LPPa) protocol message notification, and determine subsequent processes according to the location processes after the handoff, therefore maintaining the continuity of the location service.

Description

 Location processing method for terminal handover in long-term evolution network and enhanced service mobile location center

Technical field

 The present invention relates to a positioning service of a Long Term Evolution (LTE) network, and more particularly to a positioning processing method and an enhanced service mobile location center in a terminal handover in an LTE network.

Background technique

 Current mobile communication technologies face the problem of providing users with higher data rates, which require better coverage and greater capacity for the network. In order to solve the above problems, the 3rd Generation Partnership Project (3GPP) launched the radio access network LTE, Evolved-UTRA (E-UTRA) and evolved in December 2004. Access network (Evolved-UTRAN, E-UTRAN), and all-IP packet domain core network evolution project System Architecture Evolution (SAE), hope to continue to evolve and enhance the wireless interface to the core network Operators and users are increasingly supporting the growing demand to maintain their technology first-mover advantage in the mobile communications arena for the next 10 years or more.

 In the LTE positioning process, if the handover of the UE location occurs, the E-UTRAN needs to perform a series of message interactions to complete the handover. Figure 1 is a flow chart of an inter-Evolved NodeB (eNB) handover using an X2 interface, including the following steps: Step 110: The source eNB sends a handover request to the target eNB;

 Step 120: The target eNB determines that the handover can be continued, and sends a handover response to the source eNB, where the target eNB related information, such as a new Cell-Radio Network Temporary Identifier (C-RNTI), and target eNB security information. And random access parameters, etc.;

Step 130: After receiving the handover response of the target eNB, the source eNB sends a handover command to the terminal (UE), where the new eNB carries the new C-RNTI, the target eNB security information, the random access parameter, and the like. Step 140: The UE receives After the handover command, the synchronization with the target eNB is performed, and the access is successful. After the target cell, sending a handover complete message to the target eNB;

 Step 150: The target eNB updates the bearer path with the Mobility Management Entity (ΜΜΕ), and notifies the service gateway of the new bearer path.

 Step 160: The target eNB sends a release resource message to the source eNB, requesting the source eNB to release related resources, such as a UE context, and the handover process ends.

 Location Services (LCS) is a new type of value-added service provided by mobile communication networks. The service obtains the location information (latitude and longitude, movement speed, etc.) of the terminal through wireless positioning technology, and provides it to the terminal, the mobile communication network or other external entities to implement various location-related services.

 The current positioning methods can be divided into two categories, namely, a network-based positioning method and a UE-related (based on UE or UE-assisted) positioning method. Among the network-based positioning methods, the UE does not participate in the positioning signaling interaction of the positioning process. The positioning measurement and reporting are performed independently by the network. In the UE-related UE or UE-assisted positioning method, the UE participates in the positioning measurement and reporting process, such as the Observed Time Difference (OTDOA) positioning method. The terminal can measure the signal of the serving cell or the neighboring cell, or measure the satellite signal through the built-in positioning module to obtain data for calculating the current location of the terminal.

 In the LTE positioning process, if the UE location shift occurs, the continuity of the positioning service needs to be maintained according to requirements. For UE-based and UE-assisted positioning, the continuity of the positioning service when the handover occurs is not described in the current protocol, so it needs to be improved.

Summary of the invention

 The technical problem to be solved by the present invention is to provide a positioning processing method for a terminal handover in a long term evolution network and an enhanced service mobile location center, which can maintain positioning service continuity when a UE switches during a positioning service.

 In order to solve the above problem, the present invention provides a positioning processing method for terminal handover in a long term evolution network, including:

The terminal or the source evolved base station eNB transmits the long term evolution location protocol protocol data unit to the enhanced service mobile location center E-SMLC during the location service processing process. The information required to carry the positioning service in the data unit of the long-term evolution positioning protocol; and after receiving the long-term evolution positioning protocol data unit, the E-SMLC performs the positioning service according to the information required by the positioning service Processing.

 Correspondingly, the above method can also have the following characteristics:

 The step of transmitting the Long Term Evolution (Positioning Protocol Protocol) data unit to the enhanced service mobile location center E-SMLC includes:

 After the terminal completes the handover, the terminal sends a Long Term Evolution Location Protocol (LPP) data unit PDU to the enhanced service mobile location center E-SMLC; or

 The source evolved base station eNB transmits the Long Term Evolution Location Protocol LPPa Protocol Data Unit PDU to the Enhanced Service Mobile Location Center E-SMLC before transmitting the handover command.

 Correspondingly, the above method can also have the following characteristics:

 The information required for the positioning service includes one or more of positioning measurement information, terminal positioning capability information, and information for requesting or updating positioning assistance data.

 Correspondingly, the above method can also have the following characteristics:

 After the E-SMLC receives the long-term evolution location protocol protocol data unit, the step of performing the processing of the location service according to the information required by the location service includes:

 If the LPP PDU received by the E-SMLC includes the positioning measurement information, the E-SMLC ends the positioning process when performing subsequent positioning processing, or sends a positioning data request to restart the terminal positioning measurement process; and / Or

 If the LPP PDU received by the E-SMLC includes the terminal location capability information,

When the E-SMLC performs subsequent positioning processing, the positioning method is selected to continue the positioning process; and/or

 If the LPP PDU received by the E-SMLC includes the information for requesting positioning assistance data, the E-SMLC collects new positioning assistance data and sends the information to the terminal when performing subsequent positioning processing; and Or

If the LPP PDU received by the E-SMLC includes the information for updating the positioning assistance data, the E-SMLC resends the positioning assistance data to the terminal when performing subsequent positioning processing. Correspondingly, the above method can also have the following characteristics:

 After the terminal completes the handover, the terminal sends the LPP PDU to the E-SMLC. After the terminal completes the handover, the LPP PDU is sent to the E-SMLC by using the following method:

 The terminal controls the RRC uplink UL information transmission message by using a radio resource, and the LPP is

The PDU is sent to the target eNB;

 The target eNB transmits a message through the S1 application protocol S1AP uplink non-access stratum NAS, and transparently transmits the LPP PDU to the mobility management entity;

 The mobility management entity passes the LPP PDU and the terminal identity to the E-SMLC.

 Correspondingly, the above method can also have the following characteristics:

 After the E-SMLC receives the long-term evolution positioning protocol data unit, the step of performing the processing of the positioning service according to the information required by the positioning service includes:

 If the LPPa PDU carries the positioning measurement information or the positioning capability information, the E-SMLC determines to suspend transmission of positioning data, and the E-SMLC pauses to send positioning data to the source eNB and The terminal; and/or

 If the LPPa PDU carries the request or update positioning assistance data, the E-SMLC determines to collect positioning assistance data, and the E-SMLC continues to collect positioning assistance data, but does not send the positioning assistance data. ;

 After the step of performing the positioning service processing according to the information required for the positioning service, the method further includes:

 After the handover is completed, if the E-SMLC determines to suspend transmission of the positioning data, the positioning data is sent to the target eNB or the terminal to continue the positioning process; and/or

 Sending the collected positioning assistance data to the target eNB or the terminal UE if the E-SMLC determines to collect the positioning assistance data; or

 End the positioning process.

 Correspondingly, the above method can also have the following characteristics:

In the step of transmitting an LPPa PDU to the enhanced service mobile location center E-SMLC, The source eNB constructs the LPPa PDU before transmitting the handover request, or before the source eNB receives the handover response after transmitting the handover request, or before the source eNB sends the handover command after receiving the handover response, through the SI The application location report message is sent to the mobility control entity; the mobility control entity transparently transmits the received LPPa PDU to the E-SMLC.

 In order to solve the above problem, the present invention further provides a positioning processing method for terminal handover in a long term evolution network, including:

 During the location service processing, the terminal performs the handover, and the enhanced service mobile location center E-SMLC receives the status update message sent by the mobility control entity indicating that the handover is complete, and the E-SMLC sends the data required to carry the location service to the terminal. The Long Term Evolution Location Protocol LPP Protocol Data Unit PDU continues the positioning process.

 Correspondingly, the above method can also have the following characteristics:

 The step of sending the LPP PDU to the terminal by the E-SMLC includes:

 The E-SMLC sends, to the target eNB, a long-term evolution positioning protocol (LPPA) that carries data required for the positioning service, where the data required for the positioning service is request positioning assistance data or update positioning assistance data;

 After receiving the LPPa PDU, the target eNB collects positioning assistance data according to the request carried in the update or the positioning assistance data, and sends the collected positioning assistance data to the E-SMLC through the LPPa PDU;

 The E-SMLC sends the positioning assistance data to the terminal through the LPP PDU.

 In order to solve the above problems, the present invention also provides an enhanced service mobile location center.

An E-SMLC, where the E-SMLC is configured to receive a Long Term Evolution (LTE) protocol data unit sent by the terminal or the source evolved base station, and according to information required for the location service carried in the data unit of the Long Term Evolution (LTE) protocol, Performing the processing of the positioning service; or

 After receiving the status update message, the terminal sends a long-term evolution positioning protocol protocol data unit carrying the data required for the positioning service to the terminal, and continues the positioning process.

 Accordingly, the above E-SMLC can also have the following characteristics:

The E-SMLC is a Long Term Evolution Location Protocol (LPP) Data Unit PDU that is configured to be sent by the receiving terminal. Correspondingly, the above E-SMLC can also have the following characteristics:

 The E-SMLC is configured to receive a Long Term Evolution Location Protocol LPPa Protocol Data Unit (PDU) sent by the source evolved base station.

 Accordingly, the above E-SMLC can also have the following characteristics:

 The E-SMLC is a Long Term Evolution Location Protocol LPP Protocol Data Unit PDU configured to transmit data required to carry a positioning service to a terminal.

 The foregoing method and the E-SMLC are used for the UE or the UE-assisted positioning service to notify the E-SMLC of the positioning progress in the handover process through the LPP or LPPa protocol message notification. After the handover, the subsequent processing process is determined according to the positioning process. Maintain the continuity of the positioning business. BRIEF abstract

 1 is a flow chart of a handover process in the prior art;

 FIG. 2 is a flowchart of a process for maintaining continuity of a positioning service during handover according to Embodiment 1 of the present invention; FIG. 3 is a flowchart of a process for maintaining continuity of a positioning service during handover according to Embodiment 2 of the present invention; FIG. 5 is a flowchart of a process for maintaining the continuity of a positioning service during handover according to Embodiment 4 of the present invention; and FIG. 6 is a flowchart of a process for maintaining continuity of a positioning service during handover according to Embodiment 5 of the present invention. Preferred embodiment of the invention

 In order to support the positioning service, a new protocol is introduced based on the existing LTE technology: LTE Positioning Protocol (LPP) and LPPa. Wherein, LPP refers to a positioning transmission protocol between the UE and an enhanced mobile location service center (E-SMLC); LPPa refers to a positioning transmission protocol between the eNB and the E-SMLC.

During the processing of the positioning service based on the UE or the UE, when the handover occurs, the positioning data may be continuously transmitted to the UE during the handover process, but the implementation is complicated. The present invention can maintain positioning continuity in the handover process by transmitting an LPP Protocol Data Unit (PDU) or an LPPa PDU for the UE or UE-assisted positioning service according to the concept of LTE simplification processing. Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

 The embodiments of the present invention are described by using the E-UTRAN internal inter-eNB handover procedure of the X2 interface shown in FIG. 1 as an example. However, all embodiments of the present invention are applicable to the handover procedure between all E-UTRAN internal eNBs. It is not limited to X2 interface switching, such as S1 interface.

 Embodiment 1:

 In this embodiment, in the UE or UE-assisted positioning service processing process, when a handover occurs, the UE sends an LPP PDU to notify an Enhanced Serving Mobile Location Center (E-SMLC), which is determined by the E-SMLC. Continue the positioning process or end the positioning process. The scheme for maintaining the positioning continuity in the handover process of this embodiment is as shown in FIG. 2, and specifically includes the following steps:

 Step 210: The source eNB sends a handover request to the target eNB.

 Step 220: The target eNB determines that the handover can be continued, and sends a handover response to the source eNB, where the related information of the access target eNB, such as a new C-RNTI, target eNB security information, and random access parameters, is provided.

 Step 230: After receiving the handover response of the target eNB, the source eNB sends a handover command to the UE, where the new eNB carries the new C-RNTI, the target eNB security information, and the random access parameters.

 Step 240: After receiving the handover command, the UE performs synchronization with the target eNB, and after successfully accessing the target cell, sends a handover complete message to the target eNB;

 Step 250: If there is an ongoing positioning service based on the UE or the UE, the UE sends the LPP PDU to the E-SMLC, and the E-SMLC performs the subsequent positioning process after receiving the LPP PDU. The specific steps include the following steps:

 Step 2501: If there is an ongoing UE or UE-assisted positioning service, the UE constructs an LPP PDU, and sends the LPP PDU to the target eNB through an RRC UL Information Transfer message;

 The LPP PDU carries one or more of positioning measurement information, terminal positioning capability information (such as a positioning method supported by the terminal), and requesting or updating the positioning assistance data. See the existing positioning process for details.

Step 2502: The target eNB passes the S1AP Uplink NAS Transport (SI application protocol). The link non-access layer transmits a message, and transparently transmits the LPP PDU to the MME;

 Step 2503: The MME transmits the LPP PDU and the UE identifier (ID) to the E-SMLC. After the E-SMLC receives the LPP PDU, the terminal is connected to the target eNB, so the process is as follows:

 If the received LPP PDU contains the positioning measurement information, the E-SMLC may decide to end the positioning process according to the positioning QoS, the positioning initiator, or the like, or send the positioning data request to restart the UE positioning measurement process, etc. .

 If the received LPP PDU contains the terminal location capability information, the E-SMLC can select the positioning method in combination with the network positioning capability and the positioning QoS to perform the positioning process.

 If the received LPP PDU includes information for requesting positioning assistance data or updating positioning assistance data, the E-SMLC may collect new positioning assistance data and send it to the UE according to different positioning methods when performing subsequent positioning processing; or Resend the positioning assistance data to the UE.

 For the subsequent positioning process performed by the above E-SMLC, refer to the corresponding positioning process. Through the above processing, the continuity of the positioning process can be maintained after the UE handover; if the LPP PDU carries the positioning measurement information, the terminal positioning capability information, and requests or updates multiple types of positioning assistance data, the same is performed.

 Step 260: The target eNB updates the bearer path with the MME, and the MME notifies the serving gateway of the new 7-carrier path.

 Step 270: The target eNB sends a release resource message to the source eNB, requesting the source eNB to release related resources, such as the UE context, and the handover process ends.

 Step 280: The MME sends a status update message to the E-SMLC to notify the E-SMLC that the handover is complete.

 A system for implementing the long-term evolution network positioning service of the first embodiment includes a terminal and an enhanced service mobile location center (E-SMLC), where

 The terminal is configured to perform the handover of the terminal in the process of the positioning service, and after the terminal completes the handover, the LPP PDU is constructed and sent to the E-SMLC, and the information required for the positioning service is carried in the LPP PDU;

The E-SMLC is configured to receive the LPP PDU sent by the terminal and carry it according to the LPP PDU. The information required for the service is located and the subsequent processing of the location service is performed.

 Embodiment 2:

 In this embodiment, the UE or the UE assists the positioning service. In the handover process, the source eNB determines to send the LPPa PDU to the E-SMLC through the source eNB before the UE sends the handover request to the target eNB after the handover, and the E-SMLC determines the positioning process. Or ending the positioning process; after the completion of the handover, the E-SMLC performs the continuation or the locating process according to the determined result, as shown in FIG. 3, which specifically includes the following steps:

 Step 310: The source eNB determines that the UE is to perform eNB handover. If there is an ongoing UE-based or UE-assisted location service, the source eNB sends an LPPa PDU to notify the E-SMLC, and the E-SMLC determines the subsequent processing of the location service. Steps:

 Step 3101: The source eNB determines that the UE is to perform the eNB handover, if there is a positioning service based on the UE or the UE, the source eNB constructs the LPPa PDU, and sends the message to the MME through the SI AP Location Reporting message.

 The LPPa PDU includes one or more of positioning measurement information, terminal positioning capability information, requesting or updating positioning assistance data;

 Step 3102: The MME transparently transmits the received LPPa PDU to the E-SMLC. After receiving the LPPa PDU, the E-SMLC determines whether to continue the positioning process or terminate the positioning process according to the positioning method and the positioning processing procedure. Is to suspend sending positioning data to the source eNB and the UE, or collecting positioning assistance data;

 If the LPPa PDU carries the positioning measurement information or the positioning capability information, the E-SMLC determines to suspend the transmission of the positioning data, and the E-SMLC suspends transmitting the positioning data to the source eNB and the UE; if the LPPa PDU carries the request or update the positioning assistance Data, E-SMLC is determined to collect positioning assistance data, and the E-SMLC continues to collect positioning assistance data, but does not send;

 Step 320: The source eNB sends a handover request to the target eNB.

 Step 330: The target eNB determines that the handover can continue, and sends a handover response message to the source eNB, where the related information of the access target eNB, such as a new C-RNTI, target eNB security information, and random access parameters, is provided.

Step 340: After receiving the handover response of the target eNB, the source eNB sends a handover command to the UE. And carrying the new C-RNTI, the target eNB security information, and the random access parameter, etc.; Step 350: After receiving the handover command, the UE performs synchronization with the target eNB, and after successfully accessing the target cell, sends a handover complete message to the target. eNB; during this period, the UE suspends and locates the related measurement reporting process;

 Step 360: The target eNB updates the bearer path between the MME and the MME, and the MME notifies the service gateway of the new bearer path.

 Step 370: The target eNB requests the source eNB to release related resources, such as the UE context, and the handover process ends.

 Step 380: The MME sends a status update message to the E-SMLC, indicating that the handover is completed. After receiving the status update message, the E-SMLC continues to perform the positioning process according to the result determined in step 3102.

 If the positioning data is suspended, the positioning data may be sent to the target eNB or the UE to continue the positioning process.

 If the positioning assistance data is collected, the collected positioning assistance data may be sent to the target eNB or the UE at this time;

 Or end the positioning process.

 Embodiment 3:

 In this embodiment, for the UE or UE-assisted positioning service, after the source eNB determines the UE handover and sends a handover request to the target eNB, the source eNB notifies the E-SMLC by using the LPPa PDU, and the E-SMLC determines whether to continue the positioning process or terminate the positioning process. After the handover is completed, the E-SMLC performs the positioning process or the positioning process according to the determined result, as shown in FIG. The difference between this embodiment and the second embodiment is that the source eNB uses the LPPa PDU to notify the E-SMLC of different timings. The other processing procedures are the same as those in the second embodiment, including the following steps:

 Step 410: The source eNB sends a handover request to the target eNB.

 Step 420: If there is an ongoing UE-based or UE-assisted positioning service, the source eNB sends an LPPa PDU to notify the E-SMLC, and the E-SMLC determines whether to continue the positioning process or end the positioning process.

Step 4201: After the source eNB sends a handover request to the target eNB, if there is a UE based or The UE-assisted positioning service, the source eNB constructs an LPPa PDU, and sends the LPPa PDU to the MME by using an SI AP Location Reporting message; and includes one or more of positioning measurement information, terminal positioning capability information, and request or update positioning assistance data. Step 4202: The MME transparently transmits the received LPPa PDU to the E-SMLC. After receiving the LPPa PDU, the E-SMLC determines whether to continue the positioning process or terminate the positioning process according to the positioning method and the positioning processing procedure. Is to suspend the transmission of the positioning data to the source eNB and the UE or collect the positioning assistance data; the specific execution process is shown in step 3102;

 Step 430: The target eNB determines that the handover can continue, and sends a handover response message to the source eNB, where the target eNB related information, such as a new C-RNTI, target eNB security information, and random access parameters, is provided.

 Step 440: After receiving the handover response of the target eNB, the source eNB sends a handover command to the UE, where the new eNB carries the new C-RNTI, the target eNB security information, and the random access parameters.

 Step 450: After receiving the handover command, the UE performs synchronization with the target eNB, and after successfully accessing the target cell, sends a handover complete message to the target eNB;

 Step 460: The target eNB updates the bearer path with the MME, and the MME notifies the service gateway of the new bearer path.

 Step 470: The target eNB requests the source eNB to release related resources, such as the UE context, and the handover process ends.

 Step 480: The MME sends a status update message to the E-SMLC, indicating that the handover is completed. After receiving the status update message, the E-SMLC may, according to the result determined in step 4202, if it is determined to temporarily send the positioning data to the source eNB and the UE, then the positioning data may be sent to the target eNB or the UE to continue the positioning process; The positioning assistance data may be sent, and the collected positioning assistance data may be sent to the target eNB or the UE at this time; or the positioning process is ended.

 Embodiment 4:

In this embodiment, after the source eNB determines the UE handover and sends the handover request to the target eNB, the source eNB notifies the E-SMLC by using the LPPa PDU after the source eNB receives the handover response of the target eNB. The E-SMLC determines to perform the suspension of transmitting the positioning data to the source eNB, collects the positioning assistance data, or ends the positioning process according to requirements, and the specific process is as shown in the figure. As shown in FIG. 5, the difference between the embodiment and the embodiment 2 and the third embodiment is only the timing of the source eNB notifying the E-SMLC. The other processes are the same, and are not described here.

 A system for implementing the long-term evolution network positioning service of Embodiments 2, 3, and 4, including a source eNB and an E-SMLC, where:

 The source eNB is configured to: when the terminal performs the handover, the source eNB sends an LPPa PDU to the E-SMLC, which carries the information required for the location service, before sending the handover command.

The E-SMLC is configured to receive the LPPa PDU sent by the source eNB, and perform subsequent processing of the positioning service according to the information required to carry the positioning service in the LPPa PDU.

 Embodiment 5:

 In this embodiment, for the positioning service based on the UE or the UE, after the E-SMLC receives the status update message of the MME, the E-SMLC actively sends the positioning assistance data to the UE, and continues the positioning process, as shown in FIG. Including the following steps:

 Step 610-step 660 is the same as step 110-step 160, and is not described here;

 Step 670: The MME sends a status update message to the E-SMLC, where the eNB carries the flag of the eNB, indicating that the handover is complete.

 Step 680: After receiving the status update message of the MME, the E-SMLC triggers the positioning auxiliary data sending process.

 The positioning assistance data transmission process is different for different positioning methods, including: If the positioning is global navigation satellite positioning system (GNSS), since the positioning assistance data does not need to be updated after the handover, the E-SMLC receives the MME to the status. After the update message, the positioning assistance data is directly sent to the UE;

 If it is a downlink positioning method such as OTDOA (observation of arrival time difference) or other positioning methods, such as E-CID (Enhanced Cell Identification and Positioning) in which the UE calculates the positioning result, the E-SMLC is updated when the positioning assistance data needs to be updated after the handover. The target eNB or other entity capable of acquiring new positioning assistance data, such as an OA&M (Operation and Maintenance Center), acquires new positioning assistance data, which is subsequently sent to the UE.

Taking the OTDOA positioning method as an example, the process of requesting positioning assistance data from the target eNB is as follows: Step 681: £-8 〇 constructs 1^?3?01;, which carries the request positioning assistance data, and sends the LPPa PDU to the target eNB to request positioning assistance data;

 Step 682: After receiving the LPPa PDU, the target eNB collects the positioning assistance data according to the request to carry the positioning assistance data, and sends the collected positioning assistance data to the E-SMLC through the LPPa PDU.

 Step 683: The E-SMLC sends the positioning assistance data to the UE through the LPP PDU.

 At this time, the UE may report the measurement information to the switched cell according to the received positioning assistance data, thereby continuing the positioning process.

 The system for implementing the long term evolution network positioning service of Embodiment 5 includes an MME and an E-SMLC, where:

 The mobility control entity is configured to send a status update message to the E-SMLC after the handover is completed;

The E-SMLC is configured to send an LPP PDU carrying the data required for the positioning service to the terminal after receiving the status update message, and continue the positioning process.

 For the positioning service based on the UE or the UE, the E-SMLC can notify the positioning progress in the handover process in time, and determine the subsequent processing according to the positioning process after the handover, and maintain the continuity of the positioning service. .

 The present invention also provides an enhanced service mobile location center E-SMLC, where the E-SMLC is configured as a long-term evolution location protocol protocol data unit sent by a receiving terminal or a source evolved base station, and according to the foregoing long-term evolution positioning protocol protocol data. The information required for the positioning service carried in the unit, performing the processing of the positioning service; or

 After receiving the status update message, the terminal sends a long-term evolution positioning protocol protocol data unit carrying the data required for the positioning service to the terminal, and continues the positioning process.

 In order to receive information required for the location service from the terminal, the E-SMLC is configured to receive the Long Term Evolution Protocol LPP Protocol Data Unit PDU transmitted by the terminal.

 In order to receive information required for the location service from the source evolved base station, the E-SMLC is configured to receive the Long Term Evolution Location Protocol LPPa Protocol Data Unit PDU transmitted by the source evolved base station.

In order to send the data required for the positioning service to the terminal, the E-SMLC is configured to send the Long Term Evolution Location Protocol (LPP) Data Unit PDU carrying the data required for the positioning service to the terminal. The functions of the above E-SMLC are the same as those of the E-SMLC in the above system embodiment, and are not described here.

 The foregoing E-SMLC can timely understand the positioning progress in the handover process through the Long Term Evolution (Positioning and Location Protocol) data unit, so that the positioning continuity can be maintained during the handover process; and after the handover, the subsequent processing process can be determined according to the positioning progress, and the maintenance process is maintained. Locate the continuity of the business.

 One of ordinary skill in the art will appreciate that all or a portion of the steps above may be accomplished by a program to instruct the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. The invention is not limited to any specific form of combination of hardware and software.

Industrial Applicability The positioning processing method and the enhanced service mobile location center in the long-term evolution network provided by the present invention are provided, and the E-SMLC can be timely notified by the LPP or LPPa protocol message for the UE or UE-assisted positioning service. The localization progress is known in the handover process, and after the handover, the subsequent processing is determined according to the positioning process, thereby maintaining the continuity of the positioning service.

Claims

Claim  A positioning processing method for a terminal handover in a long term evolution network, including:  The terminal or the source evolved base station eNB transmits a long term evolution location protocol protocol data unit to the enhanced service mobile location center E-SMLC, where the terminal carries out the handover in the long term evolution location protocol data unit. The information needed to locate the business; and  After receiving the long-term evolution positioning protocol data unit, the E-SMLC performs processing of the positioning service according to information required for the positioning service.  2. The method according to claim 1, wherein the step of the terminal or the source evolved base station eNB transmitting the long term evolution location protocol protocol data unit to the E-SMLC comprises:  After the terminal completes the handover, the terminal sends a Long Term Evolution Location Protocol (LPP) data unit. PDU to the enhanced service mobile location center E-SMLC; or  The source evolved base station eNB transmits the Long Term Evolution Location Protocol LPPa Protocol Data Unit PDU to the Enhanced Service Mobile Location Center E-SMLC before transmitting the handover command.  3. The method of claim 2, wherein  The information required for the positioning service includes one or more of positioning measurement information, terminal positioning capability information, and information for requesting or updating positioning assistance data.  The method of claim 3, wherein the step of performing the processing of the positioning service according to the information required by the positioning service after the E-SMLC receives the data unit of the long-term evolution positioning protocol protocol comprises: :  If the LPP PDU received by the E-SMLC includes the positioning measurement information, the The E-SMLC ends the positioning process when performing subsequent positioning processing, or sends a positioning data request to restart the terminal positioning measurement process; and/or  If the LPP PDU received by the E-SMLC includes the terminal location capability information, the E-SMLC selects a positioning method to continue the positioning process when performing subsequent positioning processing; and/or If the LPP PDU received by the E-SMLC includes the information for requesting positioning assistance data, the E-SMLC collects new positioning assistance data and sends the information to the terminal when performing subsequent positioning processing; and Or If the LPP PDU received by the E-SMLC includes the information for updating the positioning assistance data, the E-SMLC resends the positioning assistance data to the terminal when performing subsequent positioning processing.  The method of claim 2 or 3 or 4, wherein, after the terminal completes the handover, the terminal sends the LPP PDU to the E-SMLC,  After the terminal completes the handover, the LPP PDU is sent to the E-SMLC by:  The terminal controls the RRC uplink UL information transmission message by using a radio resource, and sends the LPP PDU to the target eNB;  The target eNB transmits a message through the S1 application protocol S1AP uplink non-access stratum NAS, and transparently transmits the LPP PDU to the mobility management entity;  The mobility management entity passes the LPP PDU and the terminal identity to the E-SMLC.  The method of claim 3, wherein the step of performing the processing of the positioning service according to the information required by the positioning service after the E-SMLC receives the long-term evolution positioning protocol data unit comprises:  If the LPPa PDU carries the positioning measurement information or the positioning capability information, the E-SMLC determines to suspend transmission of positioning data, and the E-SMLC pauses to send positioning data to the source eNB and The terminal; and/or  If the LPPa PDU carries the request or update positioning assistance data, the E-SMLC determines to collect positioning assistance data, and the E-SMLC continues to collect positioning assistance data, but does not send the positioning assistance data. ;  After the step of performing the positioning service processing according to the information required for the positioning service, the method further includes:  After the handover is completed, if the E-SMLC determines to suspend transmission of the positioning data, the positioning data is sent to the target eNB or the terminal to continue the positioning process; and/or  Sending the collected positioning assistance data to the target eNB or the terminal UE if the E-SMLC determines to collect the positioning assistance data; or End the positioning process. 7. The method according to claim 2 or 3 or 6, wherein in the step of transmitting the LPPa PDU to the enhanced service mobile location center E-SMLC,  The source eNB constructs the LPPa PDU before transmitting the handover request, or before the source eNB receives the handover response after transmitting the handover request, or before the source eNB sends the handover command after receiving the handover response, by using the S1 The application location report message is sent to the mobility control entity; the mobility control entity transparently transmits the received LPPa PDU to the E-SMLC.  8. A positioning processing method for terminal handover in a long term evolution network, comprising:  During the location service processing, the terminal performs the handover, and the enhanced service mobile location center E-SMLC receives the status update message sent by the mobility control entity indicating that the handover is complete, and the E-SMLC sends the data required to carry the location service to the terminal. The Long Term Evolution Location Protocol LPP Protocol Data Unit PDU continues the positioning process.  The method of claim 8, wherein the step of the E-SMLC transmitting the LPP PDU to the terminal comprises:  The E-SMLC sends, to the target eNB, a long-term evolution positioning protocol (LPPA) that carries data required for the positioning service, where the data required for the positioning service is request positioning assistance data or update positioning assistance data;  After receiving the LPPa PDU, the target eNB collects positioning assistance data according to the request carried in the update or the positioning assistance data, and sends the collected positioning assistance data to the E-SMLC through the LPPa PDU;  The E-SMLC sends the positioning assistance data to the terminal through the LPP PDU.  An enhanced service mobile location center E-SMLC, where the E-SMLC is configured to receive a long-term evolution location protocol protocol data unit sent by a terminal or a source evolved base station, and according to the long-term evolution positioning protocol protocol data unit The information required for the positioning service carried in the operation, and the processing of the positioning service is performed; or  After receiving the status update message, the terminal sends a long-term evolution positioning protocol protocol data unit carrying the data required for the positioning service to the terminal, and continues the positioning process. 11. The E-SMLC of claim 10, the E-SMLC being a Long Term Evolution Location Protocol (LPP) Data Unit PDU configured to be received by a receiving terminal. The E-SMLC according to claim 10, wherein the E-SMLC is configured to receive a Long Term Evolution Location Protocol LPPa Protocol Data Unit PDU transmitted by a source evolved base station.  The E-SMLC according to claim 10, wherein the E-SMLC is a Long Term Evolution Protocol LPP Protocol Data Unit (PDU) configured to transmit data required to carry a positioning service to a terminal.