WO2012003615A1

WO2012003615A1 - Positioning method for long term evolution-advanced system

Info

Publication number: WO2012003615A1
Application number: PCT/CN2010/001628
Authority: WO
Inventors: 李国荣
Original assignee: 新邮通信设备有限公司
Priority date: 2010-07-07
Filing date: 2010-10-15
Publication date: 2012-01-12
Also published as: CN101883427B; CN101883427A

Abstract

A positioning method for Long Term Evolution-Advanced (LTE-A) system is disclosed in the present invention. In the positioning procedures relevant with the Relay Node (RN) and the User Equipment (UE), the RN is respectively added into the protocol stack from the Evolved Serving Mobile Location Centre (E-SMLC) to the RN and the protocol stack from the E-SMLC to the UE; the Long term evolution Positioning Protocol Annex (LPPa) protocol is extended at the RN; the RN participates in the positioning procedure, forwarding Long term evolution Positioning Protocol (LPP) signal message and processing the LPPa message. The positioning method in the present invention can successfully implement the positioning procedure in the LTE-A system.

Description

Positioning method in a subsequent evolution system of long-term evolution technology

Technical field

The present invention relates to mobile communication technologies, and in particular, to a positioning method in a Long Term Evolution (LTE-A) system.

Background of the invention

The positioning technique is a method of determining the geographic location and rate of a User Equipment (UE) based on measuring wireless signals. Figure 1 is long-term evolution (LTE A schematic diagram of a UE positioning structure in a system-developed universal mobile communication system radio access network (E-UTRAN). Enhanced Service Mobile Location Center (E-SMLC) as shown in Figure ) for managing different location services supporting the target UE, including: positioning of the UE, and sending assistance data to the UE. The E-SMLC can communicate with the serving base station through the Mobility Management Entity (MME) ( The eNode B and the eNB interact to obtain the positioning measurement of the UE from the eNB, including the uplink measurement performed by the eNB and the UE. Performing downlink measurements, the above positioning measurements are provided to the eNB as part of other functions, such as handover functions and the like. E-SMLC can also pass MME and eNB with target UE Interaction, passing assistance data when a location service makes a request, or getting a location estimate.

In the existing LTE Release Agreement 9 (LTE Release-9), there are two related to LTE. The system positioning protocols are: LTE Positioning Protocol (LPP) and LTE Positioning Protocol Attachment (LPPa). The LPP protocol terminates between the UE and the E-SMLC. The LPPa protocol terminates between the eNB and the E-SMLC. In the positioning method in the LTE system disclosed in LTE Release-9, after the positioning process starts, according to LPPa The protocol is initiated by the E-SMLC to service the eNB-related location procedures, and/or, according to the LPP protocol, the UE-related location procedure is initiated by the E-SMLC.

After the LTE technology, the 3rd Generation Partnership Project (3GPP) continues to enhance the LTE solution, the LTE Open Agreement The LTE-A system is proposed in 10 (LTE Release-10). The LTE-A system adds a relay node (Relay Node, RN) in the architecture of the access network. ), the relay node RN can be seen as an extension of the eNB, providing a more economical coverage for the system. The RN is connected to the eNB through a radio interface, which can be in the eNB. The coverage edge enhances the coverage quality and can also be deployed outside the eNB coverage area to extend the coverage.

Figure 2 shows the architecture of the existing LTE-A system. As shown in Figure 2, the eNB that provides radio access services for the RN It is called a donor base station (Doror eNB, DeNB), and the RN and the DeNB are connected through a wireless Un interface; the Uu and the UE pass the wireless Uu. The interface is connected; the RN and the core network's mobility management entity and the serving gateway (MME/S-GW) node are connected through the S1 interface, and the S1 interface is transferred through the DeNB, that is, the DeNB is used as the DeNB. A forwarding node of the S1 interface between the RN and the MME/S-GW. In the LTE-A architecture, the DeNB can accept access from the UE and also accept access from the RN. When DeNB When accepting the UE's access, the DeNB behaves as a normal eNB. When the DeNB accepts the access of the RN, the DeNB includes a transit function, which is expressed as: S1 application part ( The S1AP) signaling and user plane data arrive at the DeNB first, and the DeNB obtains the arriving signaling and data, which can be parsed or even modified, and then forwarded to the RN or the evolved packet core network ( EPC).

In the current existing LTE Release-10 technology, it has not been targeted at LTE-A. The positioning process under the architecture proposes an effective implementation method. Because the RN node is added to the LTE-A architecture, if LTE Release-9 is still used In the positioning method, when a node initiates the positioning process, the RN cannot participate in the positioning process, and the UE that accesses through the RN cannot successfully complete the positioning process. In short, the existing LTE-A The positioning method in the architecture related technology cannot successfully implement the positioning process of the LTE-A system.

Summary of the invention

The invention provides a positioning method in an LTE-A system, which can successfully implement LTE-A The positioning process of the system.

In order to achieve the above object, the technical solution of the present invention is achieved as follows:

The present invention discloses a subsequent evolution of the long term evolution technology. The positioning method in the LTE-A system includes:

A. The positioning initiating node sends a positioning service request message to the mobility management entity MME;

B. MME sends a location service request message to the enhanced service mobile location center E-SMLC;

C.E-SMLC initiates a location procedure associated with the user equipment UE, and/or, E-SMLC bootstrap and relay node RN Related location process;

D. E-SMLC replies to the MME with a location service response message;

The E.MME replies to the location initiation node with a location service response message.

As can be seen from the above description, in the LTE-A system, in the location process related to the RN, the RN acts as an LPPa. The protocol endpoint, in the location process related to the UE, the RN acts as an intermediate node, thereby successfully implementing the positioning process of the LTE-A system.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic diagram of a UE positioning structure in an E-UTRAN of an LTE system;

Figure 2 is a schematic diagram of the architecture of the LTE-A system;

3 is a flowchart of a positioning method in an LTE-A system according to an embodiment of the present invention;

4 is a signaling flowchart of a positioning method in an LTE-A system according to a first preferred embodiment of the present invention;

FIG. 5 is a signaling flowchart of a positioning method in an LTE-A system according to a second preferred embodiment of the present invention; FIG.

6 is a schematic diagram of a signaling protocol stack of an E-SMLC to an RN in an LTE-A system according to an embodiment of the present invention;

7 is an LPPa packet data unit (PDU for UE positioning) according to an embodiment of the present invention; ) the signaling flow diagram passed;

FIG. 8 is a signaling flowchart of an LPPa PDU transmission for acquiring RN data according to an embodiment of the present invention;

9 is a schematic diagram of a signaling protocol stack of an E-SMLC to a UE in an LTE-A system according to an embodiment of the present invention;

10 is a signaling flowchart of a network triggered LPP PDU transmission according to an embodiment of the present invention;

FIG. 11 is a signaling flowchart of LPP PDU transmission triggered by a UE according to an embodiment of the present invention.

Mode for carrying out the invention

The present invention will be described in detail below with reference to the drawings and specific embodiments.

The basic idea of the present invention is that in the LTE-A system, the RN participates in the location process and forwards the LPP signaling message. The LPPa message is processed, wherein in the location process related to the RN, the RN participates in the location process as an endpoint, and in the location process related to the UE, the RN Participate in the location process as an intermediate node to complete the location process.

FIG. 3 is a diagram of an LTE-A according to an embodiment of the present invention; A flow chart of the positioning method in the system. In this embodiment and the following other embodiments, the UE is already in the connection mode before the start of the positioning process in the embodiment, and details are not described below. Figure 3 As shown in the embodiment of the present invention, the positioning method in the LTE-A system includes the following steps.

Step 301: The positioning initiation node sends a location service request message to the MME, that is, a Location Service. Request.

Step 302: The MME sends a location service request message to the E-SMLC, that is, the Location Service. Request.

Step 303: The E-SMLC initiates a location procedure related to the UE, ie UE Procedures, and / Or, the E-SMLC initiates the location process associated with the RN, RN Procedures.

Step 304: The E-SMLC replies to the MME with a location service response message, that is, a Location Service. Response.

Step 305: The MME replies to the location initiation node with a location service response message, that is, a Location Service. Response.

In the foregoing positioning process in the embodiment of the present invention, the positioning initiating node may be the UE in the same manner as the positioning method in the LTE system. Evolved Packet Core Location Service Entity ( EPC LCS Entities ) or MME . Moreover, since the RN node is added to the LTE-A system, the RN can serve as a location service ( The client of LCS), so the above-mentioned location initiation node can also be an RN.

The positioning initiation node is UE, EPC LCS Entities or MME through two specific embodiments. The case and the case where the location originating node is the RN are respectively described.

4 is a LTE-A according to a first preferred embodiment of the present invention; Signaling flow chart of the positioning method in the system. In this embodiment, the positioning originating node is UE, EPC LCS Entities or MME as an example. See Figure 3 and Figure 4 In this embodiment, the step 301 of the embodiment shown in FIG. 3 may be specifically performed by using step 401a, step 401b or step 401c shown in FIG. 4, and correspondingly, FIG. Step 305 of the illustrated embodiment may be specifically performed by using step 405a, step 405b or step 405c shown in FIG. Figure 4 As shown, the positioning method in this embodiment specifically includes the following steps.

According to the positioning initiation node is UE, EPC LCS Entities or MME, choose to perform the following steps 401a One of step 401b and step 401c.

If the location initiating node is a UE, step 401a is performed: the UE sends a location service request message to the MME, that is, Location Service Request.

If the location originating node is EPC LCS Entities, proceed to step 401b: EPC LCS Entities sends a location service request message to the MME, that is, Location Service Request.

If the location originating node is the MME, step 401c is performed: the MME generates a location service request message by itself, ie Location Service Request.

Step 402: The MME sends a location service request message to the E-SMLC, that is, a Location Service. Request.

After step 402, step 403a is continued, and 403b is continued on the basis of step 403a. Or, after step 402, step 403a is not executed, and step 403b is directly executed.

Step 403a: The E-SMLC initiates a location procedure associated with the RN.

Step 403b: The E-SMLC initiates a location procedure related to the UE.

Step 404: The E-SMLC replies to the MME with a location service response message, that is, a Location Service. Response.

After step 404, the originating node is UE, EPC LCS Entities or MME according to the location. , choose to perform one of the following steps 405a, 405b, and 405c.

If the location originating node is a UE, step 405a is performed: the MME replies to the UE with a location service response message, ie Location Service Response .

If the location originating node is EPC LCS Entities, then step 405b is performed: MME to EPC LCS Entities responds to the location service response message, Location Service Response .

If the location originating node is the MME, step 405c is performed: the MME replies to the location service response message to itself, ie Location Service Response .

FIG. 5 is a LTE-A according to a second preferred embodiment of the present invention; Signaling flow chart of the positioning method in the system. In this embodiment, the location originating node is an RN as an example. Referring to FIG. 3 and FIG. 5, in the embodiment, step 301 of the embodiment shown in FIG. The step 501 to the step 502 shown in FIG. 5 can be specifically implemented by using the steps 506 to 507 shown in FIG. The message between the RN and the E-SMLC is transmitted between the DeNB and the MME. As shown in FIG. 5, the positioning method in this embodiment specifically includes the following steps.

Step 501: The RN sends a location service request message to the DeNB, that is, a Location Service. Request, the message includes an evolved universal mobile communication system radio access network cell global identity (ECGI) of a cell under the RN.

Step 502: The DeNB forwards the location service request message to the MME, that is, the Location Service. Request, the message includes the ECGI of a cell under the RN.

Step 503: The MME forwards the location service request message to the E-SMLC, that is, the Location Service. Request, the message includes the ECGI of a cell under the RN.

After step 503, step 504a is continued, and 504b is continued on the basis of step 504a. Or, after step 503, step 504a is not executed, and step 504b is directly executed.

Step 504a: The E-SMLC initiates a location procedure associated with the RN. In this step, with RN Related location processes include: obtaining location measurements, obtaining assistance data, and the like.

Step 504b: The E-SMLC initiates a location procedure associated with the UE. In this step, with the UE Related location processes include: obtaining location estimates, obtaining location measurements, passing assistance data to the UE, and the like.

Step 505: The E-SMLC replies to the MME with a location service response message, that is, a Location Service. Response , the result of the location process is included in the message.

Step 506: The MME replies to the DeNB with a location service response message, that is, a Location Service. Response , the result of the location process is included in the message.

Step 507: The DeNB forwards the location service response message to the RN, that is, the Location Service. Response , the result of the location process is included in the message.

In the three embodiments of the present invention shown in FIG. 3, FIG. 4 and FIG. 5 above, in step 303 and FIG. 4 shown in FIG. Steps 403a and 403b shown, and steps 504a and 504b shown in FIG. 5, include two steps, namely: E-SMLC startup and RN The associated location process, and/or, the E-SMLC initiates a location procedure associated with the UE. The above two steps are described in detail below.

First, the steps of the E-SMLC to initiate the location process associated with the RN are described in detail.

The location process associated with the RN is implemented using the LPPa protocol. In the existing LTE system, there is termination in the E-SMLC and LPPa protocol between eNBs. After the RN is added to the LTE-A system, the serving cell of the UE is under the RN, so the E-SMLC needs to be from the RN. Obtaining related positioning information, the LPPa protocol is extended to the RN in the embodiment of the present invention. 6 is an E-SMLC to RN in an LTE-A system according to an embodiment of the present invention; Schematic diagram of the protocol stack. As shown in Figure 6, the same protocol stack as the existing E-SMLC to RN is: In the signaling protocol stack of the E-SMLC, from the lower layer to the upper layer: Layer 1 (L1) Protocol, Layer 2 (L2) protocol, Internet Protocol (IP), Flow Control Transmission Protocol (SCTP), Location Service Application Part (LCS-AP), LPPa Protocol; MME In the signaling protocol stack, from the lower layer to the upper layer are: L1 protocol, L2 protocol, IP, SCTP, S1 interface application part (S1-AP) and LCS-AP located in the same layer; In the signaling protocol stack of the DeNB, the lower layer to the upper layer are: L1 protocol and physical layer (PHY) protocol located in the same layer, L2 protocol and packet data convergence protocol (PDCP) located in the same layer. ), Line Link Control Protocol (RLC), Media Access Control (MAC), IP, SCTP, S1-AP. With existing E-SMLC to RN The difference between the protocol stacks is that the RN node is included in the embodiment of the present invention, and the protocol stack of the RN node includes LPPa. In the signaling protocol stack of the RN, the lower layer to the upper layer are: PHY protocol. PDCP, RLC, MAC, IP, SCTP, S1-AP, LPPa. In the embodiment of the present invention, the signaling protocol stack of the DeNB may include LPPa. LPPa may not be included. When LPPA is included in the DeNB's signaling protocol stack, LPPa is located on the upper layer of S1-AP. Shown in Figure 6 as DeNB The LPPa is not included in the signaling protocol stack. For the E-SMLC to obtain the relevant positioning information of the RN, the DeNB node does not need to use LPPa, so it can be applied to the DeNB. The LPPa is not included in the signaling stack.

With the LPPa protocol, the RN-related location process initiated by the E-SMLC includes two cases, in the first case with the RN The related location procedure is used to carry UE related information, such as UE positioning. In the second case, the RN related location procedure is used to carry non-UE related information, such as acquiring RN. Data. The LPPa of the above two cases will be described separately below.

FIG. 7 is a signaling flowchart of LPPa PDU delivery for UE positioning according to an embodiment of the present invention. Figure 7 As shown, the process includes the following steps.

When the E-SMLC needs to locate the target UE, send an LPPa message to the serving RN, and trigger step 701 to 703.

Step 701: The E-SMLC sends a positioning service application partial packet data unit that carries the LPPa PDU to the MME. The LCS-AP PDU constitutes a message.

Step 702: The MME sets the LPPa in the downlink connection LPPa transmission message of the UE related S1 application part. The PDU is passed to the DeNB. In this step, the MME transmits the LPPa PDU to the DeNB through the UE-related S1 signaling connection. UE related S1 The application downlink connection LPPa transmits the message, namely: S1AP Downlink LPPa UE Associated Transfer. This message includes E-SMLC Related routing ID (Routing ID). In step 702, the MME does not need to maintain maintenance status information for the delivery, and may consider the following steps 705 The response message in is independent and irrelevant.

Step 703: The DeNB sets the LPPa in the downlink related LPPa transmission message of the UE related S1 application part. The PDU is passed to the RN. In this step, the DeNB determines that the S1AP message it received in step 702 should be sent to the RN, so the DeNB does not parse the information contained in the message. LPPa PDU. The UE related S1 application part downlink connection LPPa transmission message, namely: S1AP Downlink LPPa UE Associated Transfer. The message includes the E-SMLC related Routing ID. In step 703, the DeNB does not need to maintain the status information for the delivery, and the following steps can be considered. The response message in 704 is an independent, unrelated pass.

Steps 704 through 706 are triggered when the RN needs to send an LPPa message to the E-SMLC.

Step 704: The RN sends the DeNB to the DeNB in the uplink related LPPa transmission message of the UE related S1 application part. LPPa PDU. The UE related S1 application part uplink connection LPPa transmission message, namely: S1AP Uplink LPPa UE Associated Transfer. The message includes the routing ID received in step 703 and the current ECGI of the UE.

Step 705: The DeNB sends the LPPa transmission message to the MME in the UE related S1 application part. Send an LPPa PDU. The UE related S1 application part uplink connection LPPa transmission message, namely: S1AP Uplink LPPa UE Associated Transfer. The message includes the routing ID and ECGI that the RN passes to the DeNB in step 704.

Step 706: The MME sends the LPPa PDU carrying the LPPa PDU to the E-SMLC related to the Routing ID. The LCS-AP PDU constitutes a message. The LCS-AP PDU composition message includes the ECGI delivered by the DeNB to the MME in step 705.

The above steps 701 to 706 can be repeated. If the E-SMLC needs to be independent of the UE and with the RN For the related positioning information, the E-SMLC may perform the above steps 701 to 706 to obtain the ECGI of the cell under the RN, thereby obtaining the E-SMLC to the RN. Routing.

FIG. 8 is a signaling flowchart of LPPa PDU transmission for acquiring RN data according to an embodiment of the present invention. For UE-independent For LPPa PDU delivery, the method shown in Figure 8 can be used. As shown in Figure 8, the process includes the following steps.

When the E-SMLC needs to obtain RN related data, send an LPPa message to the RN, and trigger step 801 to 803.

Step 801: The E-SMLC sends the LCS-AP PDU carrying the LPPa PDU to the MME. The ECGI that makes up the message and the cell.

Step 802: The MME will LPPA in the UE-independent S1 application part downlink connection LPPa transmission message The PDU is passed to the DeNB. In this step, the MME can find the DeNB through the ECGI of the cell. The UE-independent S1 application part of the downlink connection LPPa transmits the message, namely: S1AP Downlink Non UE Associated LPPa Transport. This message includes the routing ID associated with the E-SMLC. And the ECGI of the cell, the ECGI of the cell is added to the cell in the S1AP Downlink Non UE Associated LPPa Transport message. ECGI Information Element (IE). In step 802, the MME does not need to maintain state information for the delivery, and the response message in the following step 805 can be considered to be an independent and irrelevant delivery.

Step 803: The DeNB sets the LPPa in the downlink connection LPPa transmission message of the UE-independent S1 application part. The PDU is passed to the RN. In this step, the DeNB determines the destination RN of the message according to the ECGI included in the S1AP message received in step 802, and does not parse the message included in the message. LPPa PDU. UE-independent S1 application part downlink connection LPPa transmission message, namely: S1AP Downlink Non UE Associated LPPa Transport. This message includes the routing ID associated with the E-SMLC. In step 803, the DeNB does not need to maintain the status information for the delivery, and the following steps can be considered. The response message in 804 is an independent, unrelated pass.

When the RN needs to send the LPPa PDU containing the RN data to the E-SMLC, step 804 is triggered. Go to step 806.

Step 804: The RN sends the DeNB to the DeNB in the UE-independent S1 application part uplink connection LPPa transmission message. LPPa PDU. UE-independent S1 application part uplink connection LPPa transmission message, namely: S1AP Uplink Non UE Associated LPPa Transport. The message includes the E-SMLC related routing ID received in step 803.

Step 805: The DeNB sends the LPPa transmission message to the MME in the UE-independent S1 application part. Send an LPPa PDU. UE-independent S1 application part uplink connection LPPa transmission message, namely: S1AP Uplink Non UE Associated LPPa Transport. The message includes the E-SMLC related routing ID received in step 804.

Step 806: The MME sends the LPPa PDU carrying the LPPa PDU to the E-SMLC related to the Routing ID. The LCS-AP PDU constitutes a message.

The above steps 801 to 806 can be repeated.

The steps of the E-SMLC to initiate the location procedure associated with the UE are then described in detail.

The location process associated with the UE is implemented using the LPP protocol. In the existing LTE system, there is termination in the E-SMLC and The LPP protocol between UEs, which includes the following nodes: E-SMLC, MME, eNB, and UE. After the RN is added to the LTE-A system, the RN needs to be added. Forwarding of LPP messages by nodes. FIG. 9 is a schematic diagram of a protocol stack of an E-SMLC to a UE in an LTE-A system according to an embodiment of the present invention. As shown in Figure 9, with the existing E-SMLC to The protocol stack of the UE is the same: In the signaling protocol stack of the E-SMLC, from the lower layer to the upper layer are: L1 protocol, L2 protocol, IP, SCTP, LCS-AP, LPP Protocol; MME's signaling protocol stack, from the lower layer to the upper layer: L1 protocol, L2 protocol, IP, SCTP, S1-AP and LCS-AP in the same layer; In the signaling protocol stack of the DeNB, the lower layer to the upper layer are: L1 protocol and PHY protocol at the same layer, L2 protocol at the same layer, and PDCP, RLC, MAC, IP. , SCTP , S1-AP ; in the signaling protocol stack of the UE, from the lower layer to the upper layer are: PHY protocol, PDCP, RLC and MAC in the same layer , as well as the Radio Resource Control (RRC) protocol, LPP. Different from the existing protocol stack of the E-SMLC to the UE, the RN node, the RN is included in the embodiment of the present invention. In the signaling protocol stack, from the lower layer to the upper layer are: PHY protocol, PDCP, RLC and MAC, IP, SCTP and S1-AP, and with the IP layer to The S1-AP layer is in the same layer of RRC.

With the LPP protocol, the UE-related location initiated by the E-SMLC can be triggered by the network or by the UE. Trigger. Also, the process triggered by the network can be performed before, after, or at the same time as the process triggered by the UE. The following describes the LPP triggered by the network and triggered by the UE.

FIG. 10 is a signaling flowchart of LPP PDU transmission triggered by a network according to an embodiment of the present invention. Figure 10 As shown, the process includes the following steps.

When the E-SMLC needs to perform the LPP positioning activity, the LPP message is sent to the UE, and the step 1001 is triggered. Go to step 1004.

Step 1001: The E-SMLC sends an LCS-AP PDU carrying the LPP PDU to the MME. Make up the message.

Step 1002: The MME forwards the NAS transmission information to the NAS transmission message through the S1 application part downlink connection. The DeNB includes the session identifier and the LPP PDU in the NAS transmission information. The session identifier is related to a positioning session between the MME and the E-SMLC. S1 application part of the downlink connection The NAS transmits the message, that is, the S1AP Downlink NAS Transport; the NAS transmits the information, that is, the NAS Transport Message. In the steps In 1002, the MME does not need to maintain state information for the forwarding, and the response message in the following step 1008 can be considered as an independent and unrelated transmission.

Step 1003: The DeNB forwards the NAS transmission information to the NAS transmission message through the S1 application part downlink connection. RN. The S1 application part is connected to the NAS to transmit the message, that is, the S1AP Downlink NAS Transport; the NAS transmits the information, that is, the NAS. Transport Message. In step 1003, the DeNB does not need to forward the maintenance status information to the DeNB, and the following step 1007 can be considered. The response message in is an independent, uncorrelated transmission.

Step 1004: The RN forwards the NAS transmission information to the UE by using an RRC downlink information transmission message. RRC Downstream information transfer message, namely: RRC DL Information Transfer; NAS transmits information, ie: NAS Transport Message .

FIG. 11 is a signaling flowchart of LPP PDU transmission triggered by a UE according to an embodiment of the present invention. Figure 11 As shown, the process includes the following steps.

When the UE needs to perform the positioning activity, the LPP PDU is sent to the E-SMLC, and the step 1101 to the step is triggered. 1105.

Step 1101: The UE initiates a service request triggered by the UE. In this step, if the UE is in connection management idle ( In the ECM-IDLE state, the UE initiates a UE-triggered service request, establishes a signaling connection with the MME, and allocates the serving RN and the DeNB.

Step 1102: The UE sends the NAS transmission information to the RN, NAS through the RRC uplink information transmission message. The transmission information includes: session identifier and LPP PDU. RRC uplink information transfer message, namely: RRC UL Information Transfer; NAS Send the message, ie: NAS Transport Message. When step 1001 to step 1004 are in step 1101 to step 1105 When executed previously, the session is identified as the session ID received in step 1004.

Step 1103: The RN forwards the NAS transmission information to the NAS through a S1 application part uplink connection NAS transmission message. DeNB. The S1 application part connects to the NAS to transmit the message, namely: S1AP UL NAS Transport; the NAS transmits the information, ie: NAS Transport Message.

Step 1104: The DeNB forwards the NAS transmission information to the NAS through a partial uplink connection NAS transmission message. MME. The S1 application part connects to the NAS to transmit the message, namely: S1AP UL NAS Transport; NAS transmits information, namely: NAS Transport Message to MME.

Step 1105: The MME sends an LCS-AP PDU to the E-SMLC to form a message, and forwards the message through the message. LPP PDU.

Because the LPP PDU delivery procedure triggered by the network can be in the LPP PDU triggered by the UE. The transfer process is performed before, after or at the same time, and therefore, the above steps 1001 to 1004 may be performed before, after or at the same time from step 1101 to step 1105.

As can be seen from the above specific implementation manner, in the positioning method of the embodiment of the present invention, in the LTE-A system, in the RN and the RN The related location process and the location process related to the UE participate in the location process with the RN as an intermediate node, and the embodiment of the present invention adds the RN node to the protocol stack and extends the LPPa on the RN. Protocol, so the RN can forward the signaling messages of LPP and LPPa, thus successfully implementing the positioning process of the LTE-A system.

The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalents, improvements, etc., which are made within the spirit and principles of the present invention, should be included in the present invention. Within the scope of protection.

Claims

A subsequent evolution of the LTE-A system, characterized in that it comprises:

A. The positioning initiating node sends a positioning service request message to the mobility management entity MME;

B. MME sends a location service request message to the enhanced service mobile location center E-SMLC;

C.E-SMLC initiates a location procedure associated with the user equipment UE, and/or, E-SMLC bootstrap and relay node RN Related location process;

D. E-SMLC replies to the MME with a location service response message;

The E.MME replies to the location initiation node with a location service response message.
The positioning method according to claim 1, wherein

The positioning initiation node is: UE, an evolved packet core positioning service entity EPC LCS Entities or MME.
The positioning method according to claim 1, wherein

The step A includes: the RN sending a location service request message to the donor base station DeNB, where the message includes the RN The evolved universal mobile communication system radio access network cell global identity ECGI of a certain cell; the DeNB forwards a location service request message to the MME, where the message includes a cell of the RN ECGI ;

The step E includes: the MME replies to the DeNB with a location service response message, where the message includes the result of the location process; and the DeNB sends the RN to the RN. Forwards the location service response message, which includes the results of the location process.
The positioning method according to any one of claims 1 to 3, characterized in that the E-SMLC is activated with a user equipment RN The related location procedure is implemented by an LTE positioning protocol plus LPPa, which terminates between the E-SMLC and the RN;

The protocol stack of the RN node includes an LPPa, and the LPPa is located in the protocol stack of the RN node in the S1 application part S1-AP. Upper level.
The positioning method according to claim 4, wherein

The LPPa is not included in the protocol stack of the DeNB node;

or,

The protocol stack of the DeNB node includes an LPPa, and the LPPa is located in the S1 application part of the protocol stack of the DeNB node. The upper layer of the S1-AP.
The locating method according to claim 4, wherein the E-SMLC initiates a location procedure related to the RN for carrying UE related information;

The E-SMLC initiates a location process associated with the RN, including:

The E-SMLC sends a positioning service application partial packet data unit LCS-AP PDU carrying the LPPa packet data unit PDU to the MME. Composition message

The MME transmits the LPPa PDU to the DeNB in the downlink related LPPa transmission message of the UE related S1 application part. The message includes an E-SMLC related routing identity Routing ID;

The DeNB passes the LPPa PDU to the RN in the downlink related LPPa transmission message of the UE related S1 application part. The message includes the routing ID associated with the E-SMLC;

The RN sends an LPPa PDU to the DeNB in the uplink related LPPa transmission message of the UE related S1 application part. ;

The DeNB sends an LPPa PDU to the MME in the uplink related LPPa transmission message of the UE related S1 application part. The message includes the routing ID and ECGI that the RN passes to the DeNB;

The MME sends the LCS-AP PDU carrying the LPPa PDU to the E-SMLC related to the Routing ID. The message is composed, which includes the ECGI delivered by the DeNB to the MME.
The positioning method according to claim 4, wherein the E-SMLC initiates a location procedure related to the RN for carrying a non-UE relevant information;

The E-SMLC initiates a location process associated with the RN, including:

The E-SMLC sends the LCS-AP PDU carrying the LPPa PDU to the MME to form a message and the ECGI of the cell. ;

The MME transmits the LPPa PDU to the DeNB in a UE-independent S1 application part downlink connection LPPa transmission message, the message includes E-SMLC related Routing ID and cell ECGI;

The DeNB passes the LPPa PDU to the RN in a UE-independent S1 application part downlink connection LPPa transmission message, the message includes E-SMLC related Routing ID;

The RN sends an LPPa PDU to the DeNB in a UE-independent S1 application part uplink connection LPPa transmission message, which includes E-SMLC related Routing ID;

The DeNB sends an LPPa PDU to the MME in a UE-independent S1 application part uplink connection LPPa transmission message, where the message includes E-SMLC related Routing ID;

The MME sends the LCS-AP PDU carrying the LPPa PDU to the E-SMLC related to the Routing ID. Make up the message.
The positioning method according to any one of claims 1 to 3, wherein the E-SMLC initiates a location process related to the UE LTE positioning protocol LPP implementation, the LPP protocol is terminated between the E-SMLC and the UE;

The E-SMLC includes an RN node in a protocol stack of the UE.
The positioning method according to claim 8, wherein the E-SMLC initiates a location process related to the UE and is triggered by the network;

Then, the E-SMLC initiates a location process related to the UE, including:

The E-SMLC sends an LCS-AP PDU carrying the LPP PDU to the MME to form a message;

The MME forwards the NAS transmission information to the DeNB through the S1 application part downlink connection NAS transmission message, the NAS The transmission information includes: a session identifier and an LPP PDU;

The DeNB forwards the NAS transmission information to the RN through the S1 application part downlink connection NAS transmission message;

The RN forwards the NAS transmission information to the UE through the RRC downlink information transmission message.
The positioning method according to claim 8, wherein the E-SMLC initiates a location process related to the UE and is triggered by the UE;

Then, the E-SMLC initiates a location process related to the UE, including:

The UE initiates a service request triggered by the UE;

The UE sends the NAS transmission information to the RN through an RRC uplink information transmission message, where the NAS transmission information includes: a session identifier and an LPP. PDU ;

The RN forwards the NAS transmission information to the DeNB through the S1 application part uplink connection NAS transmission message;

The DeNB forwards the NAS transmission information to the MME through the S1 application part uplink connection NAS transmission message;

The MME sends an LCS-AP PDU to the E-SMLC to form a message, and forwards the LPP PDU through the message. .