WO2007037346A1 - HIGH-SPEED QoS HAND-OVER METHOD, AND PROCESSING NODE USED IN THE METHOD - Google Patents

Abstract

Disclosed are a high-speed QoS hand-over method, by which a QoS path reconstituted before a hand-over becomes the optimum QoS path after the hand-over as much as possible so that the load on the re-route constitution of the QoS path to be done after the hand-over can be reduced, and by which the QoS path setting section to be done just after the hand-over is shortened so that the QoS intermission time period can be minimized, and a technique for providing a processing node to be used in that method. This technique includes a step, at which a moving terminal (10) sends a first signaling for constituting a predetermined QoS path, to the processing node for a predetermined operation to reduce the load on the changing operation of the QoS after the hand-over, and a step, at which the processing node for receiving the first signaling generates, on the basis of the first signaling received, a second signaling for setting the QoS of the predetermined QoS path and sends out the generated second signaling to a path connected with itself.

Description

 Specification

 High-speed QoS handover method and processing node used in the method

 TECHNICAL FIELD [0001] The present invention relates to a high-speed QoS handover method for a mobile terminal (mobile node) that performs wireless communication and a processing node used in the method, and in particular, a mobile Internet Protocol version 6 that is a next-generation Internet protocol. The present invention relates to a high-speed QoS handover method in a mopile node that performs wireless communication using a protocol and a processing node used in the method.

 Background art

 [0002] As a new signaling protocol, NSIS (Next Step In Signaling) power ETF NSI S working group (see Non-Patent Document 1 below) is being standardized. N SIS is expected to be particularly effective in QoS (Quality of Service) resource reservation. Recent internet drafts include QoS sibling and mobility support in other NSIS (see Non-Patent Documents 2 to 4 below) in addition to general NSIS (see Non-Patent Documents 5 and 6 below). Needs and suggestions are described. Not all routers or terminals in the network are NSIS Entities (NE), but NEs have NSIS functionality. Not all NEs support QoS in mobility functions. Here, the NE with QoS function is called QNE (QoS NE).

[0003] QoS resources are reserved by each QNE along a path through which data is transferred. A flow ID is used to identify a QoS packet guaranteed on the path. Since the flow ID includes the IP addresses of the data transmission side and the reception side (see Non-Patent Document 5 below), the flow ID changes when the IP address changes due to mobility movement such as handover. On the other hand, session ID is used to identify a session between MN (Mobile Node) and CN (Correspondent Node). Therefore, the session ID remains the same even if the flow ID changes due to mobility movement.

Here, as shown in FIG. 6, when a handover occurs, a route (old path) 24 ′ and a route (new It has an important role to avoid double reservation in QoS handover, up to 12 CRN (Crossover Node) QNE located at the branch point with 34 '. Until CRN12, the overlapping path part (between CN6CT and CRN12 ') and the new path part (CRN 12'-MN 1 (between) must be treated differently: CN6 (between T and CRN12' Status update and CRN12'—MN1 (needs QoS status reservation between T. Therefore, discovery of CRN12 'is one of the important issues in QoS handover. In order to avoid or minimize it must be processed quickly, but the CRN discovery takes time and increases the signaling load.

[0005] Therefore, several techniques for solving such a problem have been proposed. For example, there is a technique disclosed in Non-Patent Document 7 below. The technology disclosed in Non-Patent Document 7 below suggests a proxy that realizes CRN discovery! The MN sends a request including the old flow ID and session ID pair to the NAR (New Access Router) acting as a proxy. The NAR sends a QU ERY message to the CN to find the upstream CRN. Each QNE on the path gets a QUERY message, compares the old flow ID and session ID pair and checks whether it is a CRN. Upon receiving the QUERY message, the CN sends a QUERY message to the NAR to discover the downstream CRN that is not just the RE SPONSE message for the received QUERY message. It takes at least one RTT (Round Trip Time) to discover a CRN, and every time the MN performs a handover, the CRN must be discovered.

 [0006] In order to reduce the signaling load, one method is to specify a QNE as a CRN. A QNE on an old QoS path is specified as a CRN, and PAR (Previous Access Router) can be considered as the specified QNE. With this configuration, the signaling load can be reduced. Such techniques are disclosed in Patent Documents 1 and 2 below.

Non-Patent Document 1: NSIS WG (http://www.ietf.org/html.charters/nsis-charter.html) Non-Patent Document 2: H. Shi haskar, Ed, "Requirements of a Quality of service (QoS) Solution for Mobile IP ", RFC3583, September 2003 Non-Patent Document 3: Sven Van den Bosch, Georgios Karagiannis and Andrew McDonald, "N SLP for Quality— of— Service signaling, draft-ietf-nsis-qos-nslp-06.txt, May 2005 Non-Patent Document 4: S. Lee, et al., "Applicability Statement of NSIS Protocols in Mobile Environments", draft— ietf—nsis— applicability— mobility— signaling— 01. txt, February 2005 Non-Patent Document 5: R. Hancock et al., “Next Steps in Signaling: Framework ", RFC4080, June 2005

 Non-Patent Document 6: M. Brunner (Editor), Requirements for Signaling Protocols ", RFC372 6, April 2004

 f ^^ j¾: T.Ue, T.Sanda, K. Honma, QoS Mobility Support with Proxy-assisted Fast Crossover Node Discovery ", WPMC2004, September 2004

 Patent Document 1: Japanese Patent No. 3441367 (Fig. 1)

 Patent Document 2: Japanese Translation of Special Publication 2002-528976 (paragraphs 0024, 0032)

However, in the network in the technology disclosed in Patent Documents 1 and 2 as shown in FIG. 7 as shown in FIG. 7, the QoS path 64 immediately after handover is almost the same as the old QoS path 2. There is no optimal path. Therefore, there is a problem in that it is necessary to reconfigure the Qo S path 34 'after the handover of up to 10 minutes, and load is applied.

 Disclosure of the invention

 [0008] In view of the above problems, the present invention makes the QoS path reconfigured before handover as an optimum QoS path after handover as much as possible, and reduces the load of the reroute configuration of the QoS path performed after handover. An object of the present invention is to provide a high-speed QoS handover method capable of minimizing the QoS interruption time and the processing node used in the method.

[0009] In order to achieve the above object, according to the present invention, an access point in which a plurality of access routers, each constituting a subnet, are connected via a communication network to form a unique communicable area. And a plurality of access routers connected to each of the plurality of access routers, wherein the access router is connected to the access point through wireless communication with the access point within the communicable area. A mobile terminal configured to perform communication of A high-speed QoS handover method by changing a QoS path when a connection is switched from a first access point connected to one access router to a second access point connected to a second access router. A step in which a terminal transmits first signaling for configuring a predetermined QoS path to a processing node that performs predetermined processing for reducing a load of processing for changing the QoS path after the handover; And the processing node receiving the first signaling generates a second signaling for setting a QoS of the predetermined QoS path based on the received first signaling, and is generated. And a method for sending the second signaling to a path connected to the second signaling. With this configuration, the QoS path reconfigured before the handover becomes the optimum QoS path after the handover as much as possible, and the load on the reroute configuration of the QoS path performed after the handover can be reduced. In addition, the QoS path setting section to be performed immediately after handover is shortened, and the QoS interruption time can be minimized.

 [0010] Further, in the high-speed QoS handover method of the present invention, the second access router to which the second access point is connected from a terminal of a communication partner of the mobile terminal itself with the predetermined QoS path power And passing through the first access router to which the first access point is connected is a preferred aspect of the present invention. With this configuration, the QoS path reconfigured before the handover can be the optimum QoS path after the handover as much as possible.

 In the fast QoS handover method of the present invention, it is a preferred aspect of the present invention that the first signaling includes information on the QoS path before the handover. With this configuration, the QoS path can be reconfigured before handover.

 In the fast QoS handover method of the present invention, it is a preferred aspect of the present invention that the information of the QoS path before the handover is session identification information and flow identification information. With this configuration, the QoS path can be reconfigured before handover.

[0013] Further, in the fast QoS handover method of the present invention, after the predetermined QoS path is configured and the mobile terminal performs the handover, the processing node, the first arc The difference between the first access router to which the access point is connected and the second access router to which the second access point is connected is the difference between the second QoS and the second QoS. It is a preferable aspect of the present invention to delete the QoS path between the second access router and the first access point to which the mobile terminal before the handover was connected. With this configuration, unnecessary QoS paths can be deleted, and wasted bandwidth consumption can be reduced.

 [0014] Further, according to the present invention, a plurality of access routers each constituting a subnet are connected via a communication network, and an access point forming a unique communicable area is provided for each of the plurality of access routers. The communication system is configured to communicate with the access router to which the access point is connected through wireless communication with the access point within the communicable area in the communication system connected to at least one of the access routers. Change of QoS path when connection is switched from the first access point connected to the first access router to the second access point connected to the second access router due to handover A processing node used in the high-speed QoS handover method based on A receiving means for receiving the first signaling for generating the mobile terminal, and a second for setting the QoS of the predetermined QoS path based on the received first signaling! / There is provided a processing node comprising signaling generating means for generating the signaling and transmission means for connecting the generated second signaling to the processing node and sending it to the path. With this configuration, the QoS path reconfigured before the handover becomes the optimum QoS path after the handover as much as possible, and the load of the reroute configuration of the QoS path performed after the handover can be reduced. In addition, the QoS path setting section performed immediately after handover is shortened, and the QoS interruption time can be minimized.

[0015] Further, in the processing node of the present invention, the second access router and the second access point to which the second access point is connected from a terminal of a communication partner of the mobile terminal with the predetermined QoS path strength Passing through the first access router to which one access point is connected is a preferred aspect of the present invention. With this configuration, the QoS path reconfigured before handover can be the optimal QoS path after handover as much as possible. The

 In the processing node of the present invention, it is a preferable aspect of the present invention that the first signaling includes information on the QoS path before the handover. With this configuration, the QoS path can be reconfigured before handover.

 [0017] Further, in the processing node of the present invention, it is a preferred aspect of the present invention that the information of the QoS path before the handover is session identification information and flow identification information. With this configuration, the QoS path can be reconfigured before the handover.

 [0018] Further, in the processing node of the present invention, the predetermined QoS path is configured, and after the mobile terminal performs the handover, the second access point is connected in the predetermined QoS path. In a preferred aspect of the present invention, the apparatus further comprises path erasure means for erasing a QoS path between the second access router and the first access point to which the mobile terminal before the handover was connected. . With this configuration, unnecessary QoS paths can be deleted, and wasted bandwidth consumption can be reduced.

 [0019] The high-speed QoS handover method of the present invention and the processing node used in the method have the above-described configuration, and the QoS path reconfigured before the handover becomes the optimum QoS path after the handover as much as possible. The load on the re-route configuration of the QoS path to be performed can be reduced. In addition, the QoS path setting section performed immediately after handover is shortened, and the QoS interruption time can be minimized.

 Brief Description of Drawings

 FIG. 1 is a configuration diagram showing a configuration of a communication network according to first and second embodiments of the present invention.

 FIG. 2 is a sequence chart showing a signaling sequence in the fast QoS handover method according to the first embodiment of the present invention.

 FIG. 3 is a configuration diagram showing a configuration of a processing node according to the first embodiment of the present invention.

 FIG. 4 is a sequence chart showing a signaling sequence in the fast QoS handover method according to the second embodiment of the present invention.

 FIG. 5 is a configuration diagram showing the configuration of a processing node according to the second embodiment of the present invention.

[Figure 6] Diagram showing a conventional communication network [Fig.7] Diagram showing QoS path immediately after handover of a mobile terminal in a conventional communication network

 BEST MODE FOR CARRYING OUT THE INVENTION

 [0021] <First embodiment>

 Hereinafter, a first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a configuration diagram showing a configuration of a communication network according to the first embodiment of the present invention. FIG. 2 is a sequence chart showing a signaling sequence in the fast QoS handover method according to the first embodiment of the present invention. FIG. 3 is a block diagram showing the configuration of the processing node according to the first embodiment of the present invention.

 First, the configuration of the communication network in the first embodiment of the present invention will be described with reference to FIG. The communication network is located between the MN (mobile terminal) 10, the communication partner CN 60 of MN10, and between MN10 and CN60, and relays signaling (also called signaling messages) and data packets between MN10 and CN60 QNE11, 12, 13, 14, AP (Access Point) 22, 23, 23, which is connected to PAR21 and NA R31, PAR21 and NAR31, which are access routers constituting each subnet 20, 30 and forms a unique communicable area It consists of 32 and 33. Note that the configuration of the communication network here is merely an example, and the present invention is not limited to this.

 [0023] The MN 10 is currently in the subnet 20, is connected to the AP 22 wirelessly, and communicates with the CN 60 through a route (QoS path) 24. In other words, the MN 10 communicates with the CN 60 through the AP 22, PAR 21, QNE 11, QNE 12, and QNE 13 on the QoS path 24. In the following, a case will be described in which NAR 31 belonging to subnet 30 is designated as a processing node that performs processing associated with QoS path change according to the first embodiment of the present invention. In the second embodiment described later, a case where PAR21 belonging to subnet 20 is specified as a processing node will be described. The processing node is not limited to NAR31 or PAR21, but may be another QNE (proxy).

[0024] When the MN 10 moves from the subnet 20 to the subnet 30 (handover), the MN 10 makes a route (QoS path) via the PAR21 to which the NAR31 and the AP22 are connected from the CN60 to the NAR31 before the handover 64 ( Here, the process from CN60 to AP22 Signaling for configuring the path) is transmitted. This signaling includes QoS path information such as the session ID and flow ID of the current QoS path 24! /. Specifically, as shown in FIG. 1, for example, Y that is the session ID of QoS path 24 and X that is the flow ID are included in the signaling. Note that the session ID of the new route (QoS path) 34 after handover of the MN 10 is Y and the flow ID is Z. As described above, the session ID remains the same even when the MN 10 moves.

 [0025] Upon receiving the signaling, the NAR 31 starts two processes. The first process is a process for configuring a QoS path toward NAR3 1 force CN60. Specifically, the NAR 31 sends signaling for configuring the QoS path (setting the QoS state) toward the CN 60. In QNE14, QNE12, and QNE13 located between NAR31 and CN60, a new QoS path state is set based on the transmitted signaling, and a QoS path (one path 64) is set between CN60 and NAR31. Part of the QoS path). The configured QoS path is the optimal path between NAR31 and CN60.

 [0026] The second process is a process for configuring a temporary QoS path (QoS path to AP22) from NAR31 to PAR21. Specifically, NAR31 sends signaling to PAR21 to make temporary QoS path configuration (QoS state setting). Then, the state of the temporary QoS path is set by the transmitted signaling, and a temporary QoS path (part of the route 64) is configured between the AP 22 and the NAR 31. The configured temporary QoS path is deleted by NAR31 or PAR21 when handover of MN10 is completed. This prevents unnecessary bandwidth consumption due to unnecessary QoS paths. Hereinafter, the signaling sequence in the above-described processing will be described with reference to FIG.

As shown in FIG. 2, a QoS path 24 (old QoS path) has already been configured between the MN 10 and the CN 60. From this state, when the MN 10 decides to perform a handover, the MN 10 transmits signaling including a session ID and a flow ID to the NAR 31 (step S201). Note that the signaling to be transmitted may include information requesting to become a branch point between the re-routed QoS path 64 and the new QoS path 34 after the handover of the MN 10. [0028] Upon receiving the signaling from MN10, NAR31 sends signaling for temporary QoS path configuration (QoS state setting) from NAR31 to AP22 to PAR21 (step S202), and from NAR31 to CN60 Signaling for QoS path configuration (QoS state setting) is sent to CN 60 (step S 203). The state setting of the re-routed QoS path 64 is performed by these signaling, and the QoS path 64 is configured between the CN 60 and the AP 22. When the MN 10 starts and completes the handover, the temporary QoS path to the NAR3 1 AP22 is deleted, and a new QoS path 34 is formed between the CN60 and the AP32. With this configuration, the QoS path after the handover of the MN 10 becomes an optimum QoS path as much as possible, and the load of the re-route configuration of the QoS path performed after the handover can be reduced. In addition, the QoS path setting interval performed immediately after the handover is PAR2r -NAR31 'AP32'- ΜΝ1 (Γ as shown in Fig. 7, whereas in the first embodiment of the present invention, it is shown in Fig. 1. As shown in the figure, it becomes shorter as NAR31—AP32—MN 10. Therefore, the time required for QoS path configuration is shortened and the QoS interruption time can be shortened, and the generated QoS path passes through both PAR21 and NAR31. Therefore, it is also useful in the so-called “ping-pong phenomenon” in which MN10 moves back and forth between PAR21 and NAR31.

 Next, the configuration of the processing node according to the first embodiment of the present invention will be described using FIG. In the following description, the NAR 31 belonging to the subnet 30 after the handover of the MN 10 is taken as an example of the processing node. As shown in FIG. 3, the NAR 31 includes a receiving unit 301, a transmitting unit 302, a signaling generating unit 303, a path erasing unit 304, and a storage unit 305. The receiving unit 301 receives signaling for configuring the QoS path 64 from the MN 10 described above, packets exchanged between the CN 60 and the MN 10, and the like. The transmission unit 302 transmits signaling for configuring the QoS path 64 generated by the signaling generation unit 303 described later, a packet exchanged between the CN 60 and the MN 10, and the like.

[0030] Based on the signaling for configuring the QoS path 64 transmitted from the MN 10, which is received by the receiving means 301, the signaling generation means 303 is based on the QoS path between the CN 60 and the NAR 31, and between the NAR 31 and the AP 22. Signaling to construct QoS paths between Are generated respectively. The path erasure unit 304 erases a temporary QoS path from NAR 31 to AP 22 when the MN 10 completes the handover after the QoS path 64 is configured between the CN 60 and the AP 22. This temporary QoS path deletion may be performed by PAR21 or other devices. The storage unit 305 stores information such as a control program for controlling the operation of the NAR 31 and data generated when the NAR 31 performs processing.

 [0031] <Second embodiment>

 Hereinafter, a second embodiment of the present invention will be described with reference to FIG. 4 and FIG. FIG. 4 is a sequence chart showing a signaling sequence in the fast QoS handover method according to the second embodiment of the present invention. FIG. 5 is a configuration diagram showing a configuration of a processing node according to the second embodiment of the present invention.

 In the second embodiment, a case will be described in which PAR2 1 belonging to subnet 20 is designated as a processing node as described above. Note that the communication network in the second embodiment is the same as the communication network in the first embodiment. A signaling sequence in the case of the second embodiment will be described with reference to FIG. As shown in FIG. 4, a route (old QoS path) 24 is configured between the MN 10 and the CN 60 before handover.

 [0033] When the MN 10 decides to perform handover from this state, the MN 10 transmits signaling (including a session ID, a flow ID, etc.) to the PAR 21 (step S401). Then, the PAR 21 that has received the signaling transmits signaling for setting the QoS state to the NAR 31 (step S402). The NA R31 that has received the signaling transmits the QoS state setting signaling to the CN 60 in the same manner (step S403). As a result, QNE14, QNE12, and QNE13 located between NAR31 and CN60 perform a new QoS path state setting based on the transmitted signaling, and the rerouted QoS path 64 is set between CN60 and AP22. Configured between.

[0034] When the MN 10 actually starts and completes the handover, the temporary QoS path from the NAR 31 to the AP 22 is deleted, and a new QoS path 34 is configured between the CN 60 and the AP 32. With this configuration, the QoS path after handover of MN10 is The QoS path is optimized as much as possible, and the load on the re-route configuration of the QoS path performed after handover can be reduced. In addition, the QoS path setting interval performed immediately after handover is conventionally PAR2r-NAR31'-AP32'-ΜΝ1 (Γ as shown in FIG. 7, whereas in the second embodiment of the present invention, the path shown in FIG. As shown in Fig. 4, the time required for QoS path configuration is shortened and the QoS interruption time can be shortened, and the generated QoS path power PAR21 and NAR31 are both shortened. This is also useful for the so-called “ping-pong phenomenon” in which MN10 moves back and forth between PAR21 and NAR31.

 Next, the configuration of the processing node according to the second embodiment of the present invention will be described with reference to FIG. In the following description, PAR21 belonging to subnet 20 before handover of MN 10 is taken as an example of the processing node. As shown in FIG. 5, the PAR 21 includes a receiving unit 501, a transmitting unit 502, a signaling generating unit 503, a path erasing unit 504, and a storage unit 505. The receiving unit 501 receives signaling for configuring the QoS path 64 from the MN 10 described above, packets exchanged between the CN 60 and the MN 10, and the like. The transmitting unit 502 transmits signaling for configuring the QoS path 64 generated by the signaling generating unit 503 described later, a packet exchanged between the CN 60 and the MN 10, and the like.

 [0036] Based on the signaling for configuring the QoS path 64 transmitted from the MN 10 received by the receiving unit 501, the signaling generation unit 503 performs signaling for configuring the QoS path between the CN 60 and the AP 22. Is generated. Then, the NAR 31 that receives the generated signaling generates signaling for configuring a QoS path between the CN 60 and the NAR 31 itself based on the received signaling, and transmits the generated signaling to the CN 60.

[0037] The node elimination means 504 creates a temporary QoS path from NAR31 to AP22 when MN10 starts and completes handover after QoS path 64 is configured between CN60 and AP22. It is to be erased. Note that this temporary QoS path deletion may be performed by the NAR 31 or another device. The storage means 505 stores a control program for controlling the operation of the PAR21 and information such as data generated when the PAR21 performs processing. It is.

 [0038] The embodiments of the present invention have been described above. Note that each functional block used in the description of the above embodiment is typically realized as an LSI which is an integrated circuit. These may be individually made into one chip, or may be made into one chip so as to include a part or all of them. Here, it is sometimes called IC, system LSI, super LSI, or ultra LSI, depending on the difference in power integration of LSI. Further, the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit or a general-purpose processor. An FPGA (Field Programmable Gate Array) that can be programmed after manufacturing the LSI or a reconfigurable processor that can reconfigure the connection and settings of the circuit cells inside the LSI may be used. Furthermore, if integrated circuit technology that replaces LSI emerges as a result of advances in semiconductor technology or other technologies derived from it, it is natural that the integration of functional blocks may be performed using this technology. For example, biotechnology can be applied.

 Industrial applicability

[0039] The high-speed QoS handover method according to the present invention and the processing node used in the method are such that the QoS path reconfigured before the handover becomes the optimum QoS path after the handover as much as possible. The load on the route configuration can be reduced, and the QoS path setup section to be performed immediately after handover is shortened to minimize the QoS interruption time. Therefore, the high-speed Qo S of mobile terminals (mopile nodes) that perform wireless communication can be minimized. It can be used for the handover method and processing nodes used in the method, and in particular, high-speed QoS hand-over in a mopile node that performs wireless communication using the Mobile Internet Protocol version 6 (Mobile IPv6) protocol, which is the next-generation Internet protocol. It is useful for the method and the processing nodes used in the method.

Claims

The scope of the claims  [1] A plurality of access routers each constituting a subnet are connected via a communication network, and at least one access point forming a unique communication area is connected to each of the plurality of access routers. A mobile terminal configured to perform communication with the access router to which the access point is connected through wireless communication with the access point within the communicable area. Enables fast QoS handover by changing the QoS path when the connection is switched from the first access point connected to the first access router to the second access point connected to the second access router. A method,  The mobile terminal transmits first signaling for configuring a predetermined QoS path to a processing node that performs a predetermined process for reducing the load of the change process of the QoS path after the handover. Steps,  The processing node that receives the first signaling generates second signaling for performing QoS setting of the predetermined QoS path based on the received first signaling, and the generated second signaling is generated. Sending the signaling of 2 to the path connected to itself,  A high-speed QoS handover method.  [2] The predetermined access path is connected to the second access router to which the second access point is connected and the first access point from a terminal of the communication partner of the mobile terminal. The high-speed QoS handover method according to claim 1, wherein the high-speed QoS handover method passes through the first access router.  [3] The fast QoS handover method according to claim 1, wherein the first signaling includes information on a QoS path before the handover.  4. The fast QoS handover method according to claim 3, wherein the information of the QoS path before the handover is session identification information and flow identification information. [5] After the predetermined QoS path is configured and the mobile terminal performs the handover, the processing node, the first access router to which the first access point is connected, the second access point Of the second access router to which the access point is connected Any one of the predetermined QoS paths deletes the QoS path between the second access router and the first access point to which the mobile terminal before the handover was connected. Item 4. The fast QoS handover method according to item 1. [6] A plurality of access routers each constituting a subnet are connected via a communication network, and at least one access point forming a unique communicable area is connected to each of the plurality of access routers. A mobile terminal configured to perform communication with the access router to which the access point is connected through wireless communication with the access point within the communicable area. Enables fast QoS handover by changing the QoS path when the connection is switched from the first access point connected to the first access router to the second access point connected to the second access router. A processing node used in the method,  Receiving means for receiving the first signaling for configuring a predetermined QoS path, the mobile terminal power;  Signaling generating means for generating second signaling for performing QoS setting of the predetermined QoS path based on the received first signaling;  Transmitting means for transmitting the generated second signaling to a path connected to the processing node;  A processing node to be provided.  [7] The predetermined QoS path is obtained by connecting the second access router to which the second access point is connected and the first access point from a communication partner terminal of the mobile terminal. The processing node according to claim 6, wherein the processing node passes through the first access router.  8. The processing node according to claim 6, wherein the first signaling includes information on a QoS path before the handover.  9. The processing node according to claim 8, wherein the information of the QoS path before the handover is session identification information and flow identification information. [10] After the predetermined QoS path is configured and the mobile terminal performs the handover, Among the predetermined QoS paths, a QoS path between the second access router to which the second access point is connected and the first access point to which the mobile terminal before the handover was connected The processing node according to claim 6, further comprising path erasing means for erasing data.