TWI359621B - Traffic transmission path relocation method for ra - Google Patents

Description

1359621 IX. Description of the Invention: [Technical Field] The present invention relates to Ε-UMTS (Evolved Universal Mobile Telecommunications System), and in particular to effectively relocating a traffic transmission path when a mobile terminal changes a gateway for traffic transmission The method. [Prior Art]

Fig. 1 is a network structure of Ε-UMTS, which is a mobile communication system suitable for the related art and the present invention. The Ε-UMTS system evolved from the UMTS system, where 3GPP began to prepare basic specifications for this. The Ε-UMTS system can be classified into an LTE (Long Term Evolution) system.

Referring to Fig. 1, the Ε-UMTS network is divided into E-UTRAN 20 and EPC (Evolution Packet Core) 10. The E-UTRAN 20 includes a terminal (UE (User Equipment)), a base station (eNB or eNodeB) 21, and an AG (Access Gateway) 11 (which may also be expressed as ^1/1; ?丘'). Eighty-one 11 can be divided into portions that handle user traffic and portions that handle control traffic. The AG part handling the new user traffic and the AG part handling the control traffic can communicate with each other through the newly defined interface. One or more cells may exist within a single eNode B (eNB) 21, and an interface for transmitting user traffic and controlling traffic may be used between the eNode Bs. The EPC 10 may include an AG 1 1 , a node where the user registers the UE, and the like. Wait. In addition, in the UMTS of Fig. 1, an interface capable of recognizing E-UTRAN 20 5 1359621 and EPC 10 can be used. The S1 interface can connect multiple nodes between the eNodeB 21 and the AG 11 (i.e., in a many-to-many manner). The eNode Bs can be connected to each other through the X2 interface, and there is always an X2 interface between adjacent eNodeBs within the mesh network structure. The radio interface protocol layer between the UE and the network can be divided into the first layer (L1) and the second layer (L2) according to three lower layers of the Open System Interconnection (OSI) standard model well known in the communication system industry. The third layer (L3).

The first layer (L1) uses the physical channel to provide information transmission services, and the radio resource control (RRC) layer located on the third layer (L3) is used to control the radio resources between the terminal and the network, so that the RRC layer is at the terminal and Exchange RRC messages between networks. The RRC layer is allocated to be located within a network node, such as an eNode B and an AG, or may be located only within the eNodeB or AG. Figure 2 illustrates the control plane structure of the radio access interface protocol between the terminal and the UTRAN in accordance with many 3GPP radio access network standards.

The radio access interface protocol has a horizontal layer including a physical layer, a data link layer, and a network layer, and a vertical plane having a user plane for transmitting data information and a control plane for transmitting control signals. According to the three lower layers of the open system interconnection (OSI) standard model well known in the communication system industry, the communication protocol layer can be divided into a first layer (L1), a second layer (L2), and a third layer (L3). The user plane of each control plane layer of the radiocommunication agreement in Figure 2 and the radiocommunication agreement in Figure 3 will be explained. 6 1359621 The physical layer, which is the first layer, uses the physical channel to provide the information transfer service to the upper layer. The physical layer is connected to the Medium Access Control (MAC) layer on the higher layer through the transmission channel, and the data is transmitted between the MAC layer and the physical layer through the transmission channel. Between different physical layers, in other words, between the transmitting side and the receiving side of the physical layer, data is transmitted through the physical channel.

The MAC layer of the second layer provides services to the Radio Link Control (RLC) layer belonging to the upper layer through logical channels. The second layer of the rlc layer reliably supports data transfer. The function of the RLC layer can be implemented as a functional block of the mAC layer, and in this case the 'RCC layer does not exist. The second layer of the pdcp layer performs header compression to reduce unnecessary control information, so that data transmitted over IP packets such as IPv4 or ιρν6 can be efficiently transmitted over a relatively small bandwidth radio interface.

The Radio Resource Control (RRC) layer located on the bottom of Layer 3 (L3) is defined only in the control planes and control logic channels, transmission channels, and physical channels associated with radio bearer (RB) setup, reset, and release. Here, 'RB specifies the service provided by the second layer (L2) for data transmission between the terminal and the UTRAN. The downlink transmission channel is used to transfer data from the network to the terminal, including for transmitting system information. Broadcast Channel (BCH) and Downlink Shared Channel (SCH) for transmitting user traffic or control messages. Downlinks for broadcast services or control messages, traffic can be transmitted through the downlink S C ., or through individual downlink multipoint channels (MCH). The uplink transmission channel for transmitting data from the terminal to the network includes a random access channel (RACH) for transmitting initial control messages and a uplink sCH for transmitting user traffic and control messages. In the related art, when the mobile terminal cannot communicate with the gateway (that is, to transmit traffic, it will use the mobile terminal because of the mobility of the currently connected mobile terminal, or when the gateway cannot continue other operating terminals, it will change its connection to It is suitable for the gate of the base station that it has entered. However, under this consideration, changing to the new gateway will increase the network plug. This is because the content information exchange between the gateways and the transmission of messages between many gateways, etc. AG) The connection continues and the action is taken. Road flow resistance base station and

SUMMARY OF THE INVENTION An exemplary feature of the present invention is to provide a method of relocating a traffic transmission path that optimizes transmission of a transmission message when the mobile terminal transmits for traffic, thus minimizing the network. In order to implement at least all or some of the above features, the present invention is for relocating a traffic transmission path within a mobile communication system: when a mobile terminal performs a second radio network node from a first radio network node, the most a gateway suitable for the second nodeless processing traffic; changing a traffic transmission path to a gateway; and transmitting the traffic to the second radio network node by using the changed traffic transmission path. The first radio network node may be a base station to which the current mobile terminal is connected, and the second radio network node may be a base station to which the mobile station moves to receive the service. Dynamic terminal flow change gate congestion level Provide a method, the point is delivered to the line grid road to the predetermined one of the traffic transmission to receive the mobile terminal 8 1359621

In the traffic transmission path relocation method, the traffic transmission path step includes: transmitting, by the second radio network node, a relocation message to the determined first gateway; and the first gate that has received the relocation message Transmitting a path optimization request message to a gateway before receiving a service on the gateway; and transmitting, by the second transmission, a response message to the first gateway, and notifying the network that the traffic path has been changed A traffic transmission node in the road. The relocation request message may include content information of the terminal, such as authorization information of the terminal, security information, and compression related information. The path optimization request message contains the content information and the information of the terminal. The first gateway registers the terminal on the terminal managed by the first gateway itself according to the response message, and the second gateway deletes the information related to the terminal, and also deletes the terminal from the list of terminals it manages. The above and other objects, features, aspects and advantages of the present invention will become apparent from the <RTIgt; [Embodiment] The present invention has been made aware of the above-mentioned problems with respect to the inventors of the present invention, and will be further described hereinafter. Based on this recognition, the features of the invention have been developed. Although the present invention is shown to be implemented within a mobile communication system, such as the UMTS developed under the 3GPP specifications, the present invention is also applicable to other communication systems operating under different specifications. Change the requirements, the road, the gateway, the change, the action, the other, the clear, the content, the clear, the technical, the standard, the standard, 9 1359621

As network technologies continue to evolve, it is expected that the RNC will no longer be needed because the enhanced node type (e.g., also known as access gateway) can handle current operations. This long-term evolution issue also supports the need to develop improved technology to recognize new terminals (or build and support new developments of enhanced services for network management). When the mobile terminal changes the radio (AG), Due to the mobility of the radio terminal, when the network is connected, the network traffic congestion can be reduced to the traffic transmission path that is minimized to be processed. In other words, when the mobile terminal connects its connection from the current line grid node Changing to the second radio network node will change or newly set the gateway node to handle the traffic of the optimal path node, thus optimizing the transmission efficiency. Preferably, the first radio network node can receive the destination. The serving base station node originates from the eNB, and the parallel node can move to the mobile terminal to receive the point target eNB. FIG. 4 shows an exemplary network structure model for explaining the model according to the present invention, in other words, with the AG basic network. Configuration. Please refer to Figure 4, the internal autonomous system (inter-AS) road node, and the service to be transmitted to the terminal will pass through the traffic transmission node)1 Square transferred to AG (radio network sAG 200 may be conventional solid or other network B performs future RNC link control acknowledged Shiyong Zhe v) of the amount of the terminal. Network access gateway The mobile terminal with this minimum and will not necessarily locate the method. The first time-out of the connection, the wireless communication system is connected to the second radio network pre-action terminal and the base station section relocation method of the second radio network service relocates the related 100 is a higher-order network Inter-AS (for example And tAG 2 10). 10 1359621

Inter-As 100 can be used as a tin point that interacts with different networks. Network nodes located at a higher level than AG and acting as a point of interaction with different networks can be considered as Inter-AS 100. AGs can be connected directly to each other. In other words, the two AGs can be used with or without other network nodes. The sAG (Source AG) 200 is currently connected to the terminal to receive the AG. The sAG 200 can have information related to the terminal. Terminal related Includes authorization information, security information, compression related information, service TA (review area) information, and so on. The sAG 200 contains security-related communication protocols for terminals and compression-related communication protocols. The tAG (target AG) 210 is for the terminal to move to the AG' where the teNB 300 is moved in and the seNB 310 is connected to the base station node for the terminal. The terminal allocates radio resources through the base station and receives traffic from the radio interface. If the terminal is to move 3 10 from the seNB 3 00, it will be disconnected from the seNB 300 and connected to &amp; 31 (in other words, its connection with the seNB is cut off and the teNB is wired). In this case, 'the basic teNB has a connection (S2) with the seNB 300 through which packet transmission can be performed between the eNBs. Packet transmission can be performed over a single interface (S1) on many AGs. Figure 5 shows an example of traffic (e.g., packet) transmissions between terminals moving from seNB 300 to teNB 3 eNBs. As shown in FIG. 5, when the terminal moves from the seNB 300 to the teNB 3 10 until the completion of the delivery, when the seNB 300 transmits the delivery instruction to the terminal, and the teNB receives the parent completion resource, 'between the seNB 3 00 and the teNB 3 10 The anchor or indirect connection is in the service information and PDCP, and then the eNB 10 that is to be serviced and establishes a new connection through the t teNB, ϊ, before L, 310 will execute 11 1359621 packet transmission. Figure 6 is a diagram showing the flow of traffic from sAG 200 to teNB 310 as the terminal moves from seNB 300 to teNB 310. Figure 6 shows that when the terminal moves to teNB 3 10 after the completion of the delivery, the path from sAG 200 is updated so that the traffic can be directly transmitted to the teNB instead of the seNB.

Fig. 7 shows the flow of traffic when the terminal moves from the seNB 300 to the teNB 3 10, but there is no path between the sAG 2 00 and the teNB 3 1 0. In FIG. 7, when the terminal moves from the seNB 300 to the teNB 310, but since the sAG 200 has no path directly to the teNB 310 or cannot be immediately connected due to other problems, it should be connected through the tAG 210 to the teNB 310. Perform traffic transmission. In the cases shown in Figures 6 and 7, additional traffic transmission delays may occur because traffic can be transmitted to the terminal through other paths than the optimal path. In addition, problems related to traffic transmission based on traffic load, sAG capacity, etc. may occur.

Thus, as shown in Figure 8, the gateway (e.g., 'tAG') that is most suitable for the eNB that the terminal has connected to should be relocated to transmit traffic through the best path. Figure 8 shows an example of relocating the best AG to teNB 3 1 0 and the traffic pass when the terminal moves from the seNB 300 to the teNB 3 10. Fig. 9 shows a method of optimizing the packet transmission path by AG relocation, and in particular, a method of repositioning the AG in the traffic transmission processing as shown in Figs. 6 and 7 is shown. Referring to Figure 9, the terminal transmits traffic in the receiving state or in the active mode. When the delivery is performed as the terminal moves from the seNB to the teNB, the terminal receives the traffic through the seNB (Fig. 5: InterAS (100) - sAG (200) - seNB (300) - teNB (310) - terminal). When the delivery is completed, the terminal can receive traffic directly from the teNB through the sAG (Fig. 6: Inter AG (100) - sAG (200) - teNB (310) - terminal), or can receive traffic through the tAG, in other words, the new AG ( Figure 7: Inter AS (100) - sAG (200) 4 tAG (210) - &gt; teNB (310) -> terminal).

Therefore, first, the teNB 310 checks the mobility of the terminal, in other words, the state of traffic transmission or reception. In this case, the terminal can transmit or receive traffic in active mode, or in quasi-active mode, which is active, but the terminal only transmits or receives some traffic, or does not transmit or receive any traffic. The active mode is similar to the idle mode, but differs from the standby mode in that the terminal exists and remains in the eNB to which the UE content of the terminal is connected. Wherein, it is assumed that the terminal that has transmitted and received traffic in the active mode has changed to the semi-active mode,

And the traffic transmission and reception are both in the end. When it is checked that the terminal is in the semi-primary mode, the teNB 3 10 determines the most efficient AG (e.g., tAG) (the operator can consider the characteristics such as traffic path optimization, traffic load and user load, etc.) Decision), and the AG relocation request message is transmitted to tAc} 210 (step S10). The AG relocation request message may contain UE content or similar information about the terminal. The UE content information may include authentication information, security information, and compression related information. Additional UE content information and other information can be included in the 13 relocation request message. In this case, the terminal can be changed to the standby mode or can be maintained in the semi-active mode. To this end, the teNB 3 10 can transmit a request message to change or maintain the terminal state of the terminal. When the tAG 210 receives the AG relocation request message from the teNB 310, it transmits an AG path optimization request message to the sAG (step S11). In this case, the AG path optimization message may include UE content information and identification information, or may include authentication information and security information if necessary.

After receiving the AG path optimization request message, the sag 200 may transmit an AG path optimization response message containing the authentication information related to the terminal and the content information of the security information to t AG (step S 1 2). When tAG 2 1 0 receives the AG path optimization response message, it can register or attach the terminal to its terminal list (managed by tAG itself) °saG 200 can delete or separate the content information from the terminal, or manage from it The terminal is removed from the terminal list. Alternatively, the sAG may retain some or all of the UE content information.

The sAG 200 requires the Inter-AS 100 or the server for traffic distribution or provides services within the network to change the traffic transmission path from the terminal to the tAG 210 instead of the sAG 200 through the path switching message (step si3) e receiving the path switching After the message 'I nter - AS 1 0 0 can check the traffic situation' like (traffic load, etc.) switch the traffic transmission path with respect to the service, and start the traffic transmission to the terminal through the tAG 210 instead of through the sAG 200. Therefore, traffic is transmitted directly from the Inter-AS 100 through the tAG 21 to the teNB 310, which is provided to the terminal through the best path. In addition, when the traffic load condition changes substantially again (i.e., when the traffic load is greater than a predetermined threshold), the flow path will change even after the traffic transmission path has been established. The AG relocation requirements through the last path switch will be described in detail herein with reference to FIG.

The basic assumptions and processing in Fig. 10 follow the processing of Fig. 9. In other words, the first step and the second step of Fig. 9 are the same as those performed in Fig. 10. In the third step, the tAG 210 can receive the AG path optimization response message and confirm the AG path optimization requirement. In a fourth step, tAG 210 may transmit a path switch message to I n t e r - A S 1 0 0 after receiving the AG path optimization request. After receiving the path switch message, the I nter - AS 1 0 0 can check the traffic situation (such as traffic load, etc.), switch the traffic transmission path about the service, and start to pass the t AG 2 1 0 instead of the sAG 200 to the terminal. Traffic transmission. Therefore, traffic is transmitted to tAG 2 1 0 through Inter-AS 100 and then immediately transmitted to teNB 3 1 0, thereby providing the terminal with the best path. Fig. 11 and Fig. 12 show the AG relocation processing by the terminal.

In FIGS. 1 1 and 12, the terminal (UE) 410 has moved from the seNB 300 to the teNB 310, and receives network related information or system information through the teNB 310. Network related information may include an identifier that is managed by the network to identify a region or node, and the like. Since the terminal has moved from the network (the original one) to a different network, the terminal is currently located in a different network, so that the identification code in the received network related information will be different from the previous identification code. After checking the identification code, the terminal transmits an AG relocation request message to the teNB to inform the network (teNB) that it has moved into the new network, so a new path needs to be set. When the teNB 3 10 receives the AG relocation request message 15 1359621, it transmits an A G relocation request message to t A G 2 1 Ο to notify that the terminal registration and the AG relocation must be performed. Upon receiving the AG relocation request message, tAG 2 1 0 transmits an AG path optimization request message to sAG 200. Upon receiving the AG Path Optimization Request message from the tAG 210, the sAG 200 transmits a response to the AG Path Optimization Request message to tAG 2 1 0.

In Fig. 1, after the sAG 2 00 receives the AG path optimization request message, it transmits a path switching message to the Inter-AS 100. In Fig. 12, after tAG 2 10 receives a response to the AG path optimization request message from sAG 2 00, it transmits a path switching message to Inter-AS 100. As described so far, when the mobile terminal 410 is connected to the second radio network node (teNB) 3 1 0 in a state that has been connected to the first radio network node (seNB) 300, relocation must be optimal. The gateway for the second radio network node performs traffic transmission through the optimized path, thereby reducing the degree of congestion in the network and unnecessary signaling processing generated in the related art.

Fig. 13 is a diagram showing an exemplary configuration of a mobile communication terminal according to the present invention. As shown, the mobile communication terminal 500 can include for transmitting and/or receiving data through a traffic path within the mobile communication system via a wireless link (Wi-Fi, Wi-MAX, Wi-bro, etc.) or the like. The transceiver 500, the storage unit 510' storing the data transmitted or received via the transceiver or from an external source, is used to optimize the traffic path during the execution or delivery from the source node B to the target node B. The request is transmitted to the network that determines the optimized traffic path 16 1359621 and the processor 5 10 that receives the data from the network through the optimized traffic path. As will be appreciated, other components are located within the mobile communication terminal, but are not discussed in detail herein to avoid obscuring the features of the present invention.

The present invention provides a method for relocating an access gateway (AG) in a mobile communication system having a network entity and at least one terminal, the method comprising: transmitting a relocation request from a target node B (e.g., teNB) to a target Accessing a gateway; transmitting a path optimization request from the target access gateway to a source access ramp; transmitting a path switch request from at least one of the target access gateway and the source access gateway to a higher entity; an optimized path is established by the higher entity to transmit data between the terminal and the higher entity; and when the traffic load condition substantially changes, the optimized path is re-established; The target node B transmits network related information and/or system information to the terminal, and the network related information includes an identification code to define a domain and/or a node managed by a network; the change or maintain a terminal status request is transmitted to the terminal; a response to the path optimization request is transmitted from the source access gateway to the target access gateway; and the access gateway receives the access Responding to add a terminal to the target access gateway list and/or removing a terminal from the source access gateway list according to the response received by the target access gateway; wherein the relocation request is one The AG relocation request message, the path optimization request is an AG path optimization request message, and the path switch response is an AG path switch message; wherein the higher entity (for example, the higher node Inter-AS) is based on a traffic The load situation determines the best path, where the traffic load condition is caused by a traffic overload situation 17 1359621

And a user overload condition and a capacity of the access gateway; wherein at least the source access gateway and the target access gateway contain information about the terminal, the information is related to at least authentication information, One of security information, compression related information, service information, and tracking area (TA) information; wherein if the terminal is in a semi-active mode, the step is performed; wherein the relocation request includes information about the terminal, the information is related to at least Certification, security information 'compression related information, service information and tracking area (TA) information; wherein the path optimization requirements include at least one of terminal content, identification information, authentication information and security information. In addition, the present invention provides a method for relocating an access gateway (AG) in a mobile communication system, the method comprising: determining whether a traffic path needs to be relocated; and detecting if the traffic path needs to be repositioned a terminal mode; and if the terminal is in an active mode, transmitting a mode transfer request to the terminal, or if the terminal is in a passive mode, establishing an optimized traffic path; wherein the passive mode is at least half active Mode with one of the standby modes.

Additionally, the present invention provides a method performed by a terminal for relocating an access gateway (AG) within a mobile communication system, the method comprising: delivering from a source node B (NB) to a target node During or after B, a request for an optimized traffic path is transmitted to a target node B and transmitted to the network that determines the optimized traffic path by: transmitting a retransmission from a target NB Positioning requirements to a target access gateway; transmitting a path optimization request from the target access gateway to a source access gateway; transmitting at least one of the target access gateway and the source access gateway a path switch request to a higher entity; and establishing, by the higher entity, an optimized traffic path to transmit data; and receiving, by the optimized traffic path, a data from the network; wherein the terminal is inactive The transmitting step is performed within the mode; wherein the higher entity is a network node or an internal autonomous system (Inter-AS). Although the invention has been described in the field of mobile communications, the invention is also applicable to any wireless communication system using mobile devices, such as pdas with wireless communication capabilities (i.e., interfaces) and laptops. Furthermore, the use of specific vocabulary to illustrate the invention should not limit the field of the invention to the particular type of wireless communication system. The invention also applies to other wireless communication systems using different wireless interfaces and/or physical layers, such as TDM A, CDMA. , FDMA, WCDMA, OFDM, EV-DO' Wi-Max, Wi-Bro, etc. Example embodiments may be implemented as methods, devices, or products using standard programming and/or engineering techniques to produce software and toughness Body, hardware or any combination of these. The term "product" as used herein is used in hardware logic (such as integrated circuit chips, field programmable gate arrays (FPGA) 'special purpose integrated circuits (ASIC), etc.) or computer readable media ( Such as disk storage media (such as hard disk drives, floppy disks, tapes), optical storage devices (such as CD-ROMs, optical disks, etc.), volatile and non-volatile memory devices (such as EEPR〇m, ROM' PROM Code or logic implemented in RAM, DRAM, SRAM, firmware, programmable logic, etc. The code in the computer readable media can be accessed and executed by the processor. Through the transmission media or files on the network The server may additionally access the code embodied in the specific embodiment. In this case, the article in which the code 19 1359621 is implemented may include a transmission medium such as a network transmission line, a wireless transmission medium, a transmission space, a radio wave, One-way propagation of infrared signals, etc. Of course, those skilled in the art will appreciate that many modifications can be made to this configuration without departing from the field of the invention, and that the article can contain Any information carried by the media known in the industry.

It is to be understood that the invention may be embodied in many forms without departing from the spirit or essential characteristics of the invention. All changes and modifications in the broad scope and boundaries defined in the scope of the patent application, and the equivalents of these boundaries and boundaries are included in the scope of the patent application. BRIEF DESCRIPTION OF THE DRAWINGS [0009] The accompanying drawings, which are incorporated in FIG In the schema:

Figure 1 shows an example network structure of the Ε-UMTS, which is a mobile communication system suitable for related technologies and mobile terminals; Figure 2 is a 3GPP wireless access network according to a terminal and a UTRAN Example structure of a standard radio interface protocol control plane; Figure 3 is an example structure of a user plane of the radio interface protocol according to the 3GPP radio access network standard between the terminal and the UTRAN; 20 1359621 The figure shows an exemplary network structure model for explaining the relocation method according to the present invention, in other words, a basic network configuration related to AG relocation; FIG. 5 shows the relationship between the eNBs when the terminal moves from the seNB to the teNB. Traffic (eg, packet) transmission example; Figure 6 is a diagram showing traffic transmission from sAG to teNB when the terminal moves from the seNB to the teNB;

Figure 7 shows traffic transmission when the terminal moves from the seNB to the teNB 'but there is no path between the sAG and the teNB; Figure 8 shows an example of 'relocating the best AG to the teNB and traffic transmission when the terminal moves from the seNB to the teNB Figure 9 shows a method for relocating a packet transmission path in accordance with the present invention; Figure 10 shows a method for relocating a packet transmission path by using an AG relocation request through a last path exchange;

Figs. 1 1 and 12 show the A G relocation processing by the terminal; Fig. 13 is an exemplary structure of the mobile communication terminal according to the present invention. [Main component symbol 1

10 Evolutionary packet core 〃 20 E-UTRAN 11 Access gateway 2 1 Base station 100 internal autonomous system] 200 2 10 300 3 10 4 10 Source access gateway target access gateway teNB seNB terminal (UE) 21 1359621 500 mobile communication terminal 5 10 processor 520 input unit 530 output unit 540 storage unit 5 50 transceiver

twenty two

Claims (1)

Patent No. 1359621 /. . Amendment X, X. Patent application scope: 1. A method for relocating a traffic transmission path during or after a delivery process in a mobile communication system having a network entity and at least one terminal, the method comprising the following steps: The target node B transmits a relocation request to a target access gateway; Transmitting a path optimization request from the target access gateway to a source access gateway; transmitting at least one of the target access gateway and the source access gateway to a higher entity; Establishing, by the higher entity, an optimized traffic transmission path between the at least one terminal and the higher entity, where the higher entity is an internal autonomous system (inter-AS), and is located at the The gateway (AG) is higher, and the higher entity determines the optimized traffic transmission path according to a traffic load condition, and Wherein, the traffic load condition is determined according to at least one of: a traffic overload condition, a user overload condition, and at least one capacity of the source access gateway and the target access gateway; The access gateway transmits a response to the target access gateway to respond to the path optimization request; and adds a terminal to a target access gateway list based on the response transmitted from the source access gateway And/or according to the response received by the target access gateway, remove a 23 1359621 from a source access gateway list terminal. 2. The method of claim 1, further comprising the step of: receiving, by the target node B, a relocation request from a terminal during or after execution of the delivery from the source node B to the target node B . 3. The method of claim 1, further comprising the step of: re-establishing an optimization path when the traffic load condition substantially changes. 4. The method of claim 1, wherein the relocation request is an AG relocation request message, the path optimization request is an AG path optimization request message, and the path switch response is one AG path switch message. 5. The method of claim 2, wherein at least one of the source node B and the target node B is an enhanced Node B (eNB). 6. The method of claim 2, further comprising the step of: transmitting, by the target node B, network related information and/or system information to the terminal. 7. The method of claim 6, wherein the network related information comprises an identification code for defining a domain and/or a node managed by a network. 8. The method of claim 1, wherein at least the source access gateway and the target access gateway comprise information about the terminal, the information relating to at least authentication information, security information, compression One of the relevant information, service information and tracking area (TA) information. 9. The method of claim 1, further comprising the steps of: 24 1359621 Revision Correction Page | transmitting a request to the terminal to change or maintain a terminal state. Ίο. The method of claim 1, wherein the relocation request includes information about the terminal, the information about at least authentication information, security information, compression related information, service information, and tracking area (TA) information. one. 11. The method of claim 1, wherein the path optimization requirement comprises at least one of terminal content, identification information, authentication information, and security information. 12. The method of claim 1, wherein the response includes at least one of authorized authentication information and one of security information. 1 - A method for relocating a traffic transmission path in a mobile communication system, the method comprising the following steps: during execution from a source node B (NB) to a target node B or after, by For a target Node B to transmit a network for one of the optimized traffic paths to determine the optimized traffic path, the methods include the following steps: Transmitting a relocation request from a target NB to a target access gateway; transmitting a path optimization request from the target access gateway to a source access gateway; accessing the gateway from the target and accessing the source At least one of the gateways transmits a path switching request to a higher entity; and the higher entity establishes an optimized traffic transmission path between the terminal and the higher entity, 25 1359621 (4) The higher entity is an intra-autonomous system (inter-AS) that is positioned higher than the access gateway (AG), wherein the higher entity determines the optimized traffic transmission based on a traffic load condition Path, and Wherein, the traffic load condition is determined according to at least one of: a traffic overload condition, a user overload condition, and at least one capacity of the source access gateway and the target access gateway; The access gateway transmits a response to the target access gateway to respond to the path optimization request; according to the response transmitted from the source access gateway, a terminal is added to a target access gateway list, And/or removing a terminal from a source access gateway list based on the response received by the target access gateway: and receiving a data from the network through the optimized traffic path. 1 4. A mobile terminal for transmitting and receiving data through a traffic path in a mobile communication system, the mobile terminal comprising: a transceiver adapted to transmit or receive data; a memory adapted to be stored The data transmitted by the transceiver or received from an external source; and a processor cooperating with the transceiver and the memory and adapted to perform the following steps: performing a slave node B (NB) During or after delivery to a target node B, a network for determining an optimized traffic path is transmitted by one of the following methods for optimizing the traffic path 26 1359621 The method includes the steps of: transmitting a relocation request from a target node to a target access gateway; transmitting a path optimization request from the target access gateway to a source access gateway; At least one of the access gateway and the source access gateway transmits a path switching request to a higher entity; Establishing an optimized traffic transmission path between the terminal and the souther entity by the more active entity Wherein the higher entity is an intra-autonomous system (inter-AS), which is positioned higher than the access gateway (AG), wherein the higher entity determines the optimized traffic according to a traffic load condition a transmission path, and wherein the traffic load condition is determined according to at least one of: a traffic overload condition, a user overload condition, and a capacity of at least one of the source access gateway and the target access gateway Transmitting a response from the source access gateway to the target access gateway to respond to the path optimization request; adding a terminal to a target access gate based on the response transmitted from the source access gateway And deleting the terminal from a source access gateway list; and/or receiving the data from the network through the optimized traffic path, in the track list, and/or based on the response received by the target access gateway. 27