CN109644161B - MP-GW port mapping method and system divided according to service flow in multi-path environment - Google Patents
MP-GW port mapping method and system divided according to service flow in multi-path environment Download PDFInfo
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Abstract
The invention provides a method and a system for applying the existing EPC solution (policy and charging rule) to the MPTCP solution, namely the multi-path aggregation solution, and relates to a port mapping method and a system divided by service flows. That is, the present invention adds mapping information of port numbers of an application server and an MP-GW to an MPTCP service between a terminal and the MP-GW, and additionally sets a new 5-tuple filter for matching the MPTCP service on an existing EPC (SAE-GW), and can perform matching of the MPTCP service without additionally setting an additional hardware device or software function. Therefore, the method has the advantage that the strategy and the charging rule applied to the general TCP service can also be applied to the MPTCP service.
Description
Technical Field
The present invention relates to a method and system for mapping MP-GW ports divided by service flow, and more particularly, to a method and system for mapping MP-GW ports divided by service flow, which can map a specific port of an MP-GW by application service, thereby enabling to normally apply an EPC solution (policy and charging rule) of an LTE network in a multi-path (LTE and Wifi) environment.
Background
Fig. 1 is a diagram showing a structure of a general Long Term Evolution (LTE) network. Referring to fig. 1, the configuration of an LTE network will be briefly described, and first, a User Equipment (UE) is a User terminal having an LTE chip built therein, and an Evolved Node B (eNB) is referred to as an "LTE base station" and is a device providing radio connection between the UE and the LTE network. At this time, only the connection between the UE and the eNB is a wireless connection, and all other connections are wired connections.
In addition, a System Architecture Evolution Gateway (SAE GW: System Architecture Evolution Gateway) includes a Serving-Gateway (S-GW) and a Packet data Gateway (P-GW: Packet data network-Gateway) as a device that plays a Gateway role to be passed by when a mobile communication network transmits or receives a Packet to or from an external communication network. Besides, the System also comprises a Mobility Management Entity (MME) and a Home Subscriber Server (HSS) for managing user information, wherein the MME is used for UE authentication, Evolved Packet System bearer (EPS bearer, logical tunnel generated between (UE-eNB-S-GW-P-GW)), Management and user Mobility Management.
On the one hand, when a user of the general LTE network uses an LTE service, an Evolved Packet Core (EPC) session (session) is generated or changed according to the service used. At this time, the Control of how to allocate resources and charge according to the service type or Charging system selected by the user is called Policy and Charging Control (PCC).
The PCC Function is performed in a Policy and Charging Control Function (PCRF) and a Policy and Charging Enforcement Function (PCEF) in the LTE network structure. The PCRF decides PCC rules per service Data flow (Data flow), which is decided based on operator policies (quality of service (QoS), gate status, cost policy). In addition, the PCEF (P-GW) detects the service data flows and acquires PCC rules decided by the PCRF and applies the corresponding rules to the corresponding user data packets.
In order to connect the LTE network, the terminal firstly sends an authentication request to the MME and acquires an authentication vector from the HSS, thereby achieving mutual authentication between the UE and the MME. When the authentication is successful, the MME acquires QoS information required by generating an Evolved Packet System (EPS) bearer from the HSS. Then, MME sends a session generation request to S-GW, S-GW transmits a corresponding request to P-GW, P-GW obtains PCC rules aiming at corresponding users, namely Pre-defined PCC rules (5 tuple filtering rules, service quality and charging rules) from PCRF and applies policies aiming at corresponding UE, and LTE network connection of UE is established through a series of processes of generating EPS bearing between UE and P-GW which are explicitly indicated on the PCC rules.
That is, in the general LTE network, when a TCP (transmission Control protocol) traffic (traffic) is transmitted to a UE using a specific application after the UE is connected to the network, a Policy and Charging Control (PCC) rule previously set in the SAE-GW by a 5-tuple (5-tuple) filter is applied to the TCP traffic. More specifically, different policies (policies) and charges (Charging) can be provided per service flow by mapping Destination (Destination) IP address/port number, Source (Source) IP address/port number, and information registered in the 5-tuple filter, which are included in TCP traffic of uplink and downlink.
On the one hand, only one Path (Path) in LTE or Wifi can be utilized for communication with a specific application server to be utilized by an existing terminal. In order to overcome the limitations of TCP, a Multi-Path transmission control protocol (MPTCP) has been developed, which is a technology capable of transmitting and receiving data through multiple paths such as LTE and Wifi.
An MPTCP Proxy gateway (MP-GW) is provided in a multipath environment, so that MPTCP traffic is transmitted and received between a terminal (MPAS UE) and the MP-GW, and the MP-GW establishes communication between the terminal and a specific application server by transmitting and receiving TCP traffic with each application service server.
However, it is difficult to apply the Multi-Path Aggregation (Multi-Path Aggregation) technique due to the uncertain Proxy (Proxy) characteristics (variations in destination IP address, port number, and the like) in the MP-GW. In other words, the 5-tuple filter cannot act properly in the SAE-GW due to the uncertain Proxy (Proxy) nature of the MP-GW.
In addition, in a multipath environment, the SAE-GW is located between a terminal and an MP-GW, target IP address and port information of a traffic flow transmitted from the terminal are IP address and port information of the MP-GW and not address and port information of an application server providing a service, and since the target IP address and port information of a 5-tuple filter registered in the SAE-GW are information of the application server, a mapping cannot be normally formed on the 5-tuple filter, and thus there is a problem that a PCC rule cannot be applied to the traffic flow.
That is, it is difficult to apply the multipath aggregation technique due to the uncertain Proxy (Proxy) characteristics (changes in destination IP address, port number, and the like) in the MP-GW and the Mismatch (Mismatch) with the mapping information registered in the 5-tuple filter.
Disclosure of Invention
Problems to be solved by the invention
The present invention has been made to solve the above problems, and it is an object of the present invention to provide an MP-GW port mapping method and system for mapping a specific port of an MP-GW per service flow, which can normally apply EPC solution (solution) (policy and charging rule) of an LTE network in a multi-path environment.
Means for solving the problems
According to an embodiment of the present invention, a method for mapping a port of an MP-GW (MPTCP Proxy gateway) divided by a service flow, which maps the port of the MP-GW by a service flow formed between a terminal and an application server to enable utilization of a specific application service in a Multi-Path (Multi-Path) environment, includes: step a), transmitting MPTCP (Multi-Path Transmission Control Protocol) service containing port number of MP-GW corresponding to IP address of the application server between the terminal and the MP-GW; and a step b) of mapping the registered mapping information with a port number of the MP-GW included in the MPTCP traffic in a 5-tuple filter for MPTCP traffic matching additionally provided in the SAE-GW, the 5-tuple filter for MPTCP traffic matching being used for providing different policies (policies) and Charging (Charging) for each service flow.
In addition, before the step a), the method comprises the following steps: step 1), the terminal sends a strategy request message to an MP manager; and 2), when the MP manager receives the strategy request message, transmitting a port list to the terminal through a strategy response message, wherein the port list is obtained by mapping an application server IP address and a port number of the MP-GW.
In addition, in the case that two sub-streams of LTE and Wifi exist between the terminal and the MP-GW, after the step 1), the method further includes step 3), where the MP manager transmits a Session Mapping table (Session Mapping table) to the MP-GW, where the Session Mapping table includes IP addresses, application server IP addresses and port numbers of the two sub-streams (LTE and Wifi) for one terminal, and IP addresses and port number information of the MP-GW allocated to the corresponding service stream. In the step a), when an MPTCP sub-service is transmitted from one terminal to an MP-GW through each sub-stream (LTE, Wifi), the MP-GW integrates the two MPTCP sub-services into one TCP service by referring to the Session mapping table, and then transmits the resultant TCP service to a target application server through an External Session (External Session), which is a general TCP Session.
The mapping information registered in the 5-tuple filter for MPTCP traffic matching is information obtained by mapping an IP address of an application server and a port number of an MP-GW, and in the step b), the service flow of the MPTCP traffic is identified based on the port number of the MP-GW mapped by the 5-tuple filter for MPTCP traffic matching.
An MP-GW (MPTCP Proxy gateway) port mapping (mapping) system according to an embodiment of the present invention maps a port of an MP-GW by a service flow formed between a terminal and an application server to enable utilization of a specific application service in a Multi-Path (Multi-Path) environment, including: a terminal transmitting an MPTCP service including a port number of an MP-GW corresponding to the IP address of the application server to the MP-GW or receiving the MPTCP service from the MP-GW; and an SAE-GW which is located between the terminal and the MP-GW and is further provided with a 5-tuple filter for MPTCP traffic matching, wherein the 5-tuple filter for MPTCP traffic matching is used for providing different policies (policies) and Charging (Charging) according to service flows, and mapping information registered in the 5-tuple filter for MPTCP traffic matching forms mapping with a port number of the MP-GW included in the MPTCP traffic.
The SAE-GW further includes a 5-tuple filter for MPTCP traffic matching provided independently of a 5-tuple filter provided for matching TCP traffic, information obtained by mapping an IP address of an application server and a port number of the MP-GW is registered in the 5-tuple filter for MPTCP traffic matching, and the SAE-GW identifies a service flow of the MPTCP traffic based on the MP-GW port number mapped by the 5-tuple filter for MPTCP traffic matching.
The Quality of Service (QoS) and charging rule (charging rule) of the 5-tuple filter for MPTCP traffic matching are the same as those of the 5-tuple filter for TCP traffic matching.
In addition, the MP-GW port mapping system divided by service flows further includes an MP manager, and when the MP manager receives a policy request message from the terminal, the MP manager transmits a port list, which is a list obtained by mapping an application server IP address and a port number of an MP-GW, to the terminal through a policy response message.
Finally, under the condition that two sub-streams of LTE and Wifi exist between the terminal and the MP-GW, when the MP manager receives a policy request message from the terminal, a Session Mapping table (Session Mapping table) is transmitted to the MP-GW, wherein the Session Mapping table comprises IP addresses, application server IP addresses and port numbers of the two sub-streams (LTE and Wifi) aiming at the terminal and IP addresses and port number information of the MP-GW allocated to the corresponding service stream; and when the MP-GW receives MPTCP sub-services from the terminal through each sub-stream (LTE, Wifi), the MP-GW integrates the two MPTCP sub-services into one TCP service by referring to the session mapping table, and then transmits the TCP sub-service to a target application server through a general TCP session, namely an external session.
Effects of the invention
The invention has the advantages that the mapping information is added in the MPTCP service between the terminal and the MP-GW, the mapping information comprises the IP address of the application server for providing each service and the port number of the MP-GW, and a new 5-tuple filter for matching the MPTCP service is additionally arranged on the existing EPC (SAE-GW), so that the newly added MPTCP service is matched by using the existing EPC solution without additionally arranging additional hardware equipment or software functions.
Drawings
Fig. 1 is a structural diagram of a general LTE network.
Fig. 2 is a schematic diagram illustrating a function of LTE and WiFi traffic (traffic) Aggregation (Aggregation) in the fourth layer (layer4) by applying MPTCP.
Fig. 3 is a diagram illustrating a procedure of forming a match of general TCP traffic (traffic) in an existing general LTE network in a 5-tuple filter of SAE-GW.
Fig. 4 is a diagram illustrating that matching cannot be normally achieved when MPTCP traffic (traffic) is applied to a 5-tuple filter of SAE-GW in a multipath network in a state where a port mapping is not formed.
Fig. 5 is a diagram showing that a new port-based 5-tuple filter is additionally provided in the SAE-GW so that MPTCP traffic (traffic) and general TCP traffic (traffic) match in the multipath network to which port mapping is applied.
Fig. 6 is a diagram showing a port list delivered from an MP manager to a terminal and a state of an action according to port mapping information.
Fig. 7 is a diagram illustrating mapping of MPTCP Subflow (LTE, WiFi) of a terminal per specific service.
Detailed Description
Hereinafter, the technical idea of the present invention will be described in more detail using the accompanying drawings.
The drawings are only examples for more specifically illustrating the technical idea of the present invention, and the technical idea of the present invention is not limited to the drawings.
Fig. 2 is a schematic diagram illustrating a function of aggregating (Aggregation) LTE and WiFi traffic (traffic) in a fourth layer (layer4) by applying MPTCP. As described above, MPTCP can simultaneously operate LTE and WiFi that have been operated separately, and therefore, the bandwidths of LTE and WiFi are combined and increased, and the speed can be increased accordingly.
However, when MPTCP is applied in this manner, problems occur in the operation of the EPC solution in the LTE network part, and a detailed description will be given with reference to fig. 3, which is a diagram showing an operation procedure in a conventional general LTE network, and fig. 4, which is a diagram showing an operation procedure and problems occurring when MPTCP is applied. At this time, the MPTCP flow (flow) is the content for the LTE flow (flow), which is a sub-flow (sub-flow) (fig. 3, 4, and 5).
Fig. 3 is a diagram showing an action procedure of an EPC solution in an existing general LTE network (procedure in which general TCP traffic (traffic) forms a match in a 5-tuple filter of SAE-GW).
At this time, a single TCP session is established between the terminal (UE) and the application server (App Svr), and the IP address and port information of the target application server of the uplink and the IP address and port information of the target application server of the downlink included in the TCP traffic are mapped with the information of the 5-tuple filter registered in the SAE-GW located therebetween, thereby realizing the Matching of the TCP traffic (Matching).
That is, as shown in the figure, in the 5-tuple filter for matching the existing TCP traffic, a source IP address (srcIP), a destination IP address (dstIP), a protocol ID, a source port number (srcPort), and a destination port number (dstPort) are registered for each of a transmission Direction (Direction) Uplink (UL) and a Downlink (DL) of the TCP traffic, and the registered information is mapped with the source IP address/port number and the destination IP address/port number included in the TCP traffic. That is, it is possible to identify "which ue (srcip) requested which service (HTTP when dstPort is 80) with which Protocol (TCP when Protocol is 6) is used by which application server (dstIP) and distinguish the services by 5-tuple, thereby applying PCC rules (quality of service (QoS) and Charging Rule) on the corresponding traffic (traffic). For reference, the SAE-GW refers to a gateway that integrates the S-GW and the P-GW that perform the UE authentication and PCC functions among the LTE components as described above.
Fig. 4 is a diagram illustrating that matching cannot be normally achieved when MPTCP traffic (traffic) is applied to a 5-tuple filter of SAE-GW in a multipath network in a state where a port mapping is not formed.
Referring to fig. 4, observing the uplink situation in the multipath environment, in the interval between the terminal (MPAS-UE) and the application server (APP Svr), the source IP address and port information contain information of the terminal, and the destination IP address and port information are MPTCP traffic (traffic) containing MP-GW information. In addition, a session is established between the MP-GW and the application server (APP Svr) by using a general TCP traffic (traffic), i.e., the source IP address and the port information are information of the MP-GW, and the destination IP address and the port information include information of the application server.
As shown in fig. 4, in the case where the SAE-GW is located between the terminal and the MP-GW, since the target IP address and port information of the Uplink (UL) MPTCP traffic is information of the MP-GW and not information of the application server, it cannot be mapped with the application server IP address/port number on the 5-tuple filter that has been set in the SAE-GW.
As an embodiment, as shown in fig. 4, Uplink (UL) MPTCP traffic (traffic) includes an IP address (dstIP)10.10.10.10 of MP-GW as a destination, a port number 7000 of MP-GW and is transmitted from the terminal to the MP-GW, converted into TCP traffic (traffic) at the MP-GW and transmitted to an application server to which the terminal is connected. At this time, since the information of the corresponding application server in the 5-tuple filter in the SAE-GW is set as the target information (dstIP is 1.1.1.1, dstPort is 80), the corresponding service (traffic) cannot be mapped with the already set mapping information.
The present invention is made to solve the above-mentioned problems, and relates to a method of mapping (mapping) an MPTCP Proxy gateway (MP-GW) port per service flow formed between a terminal and an application server so as to be able to utilize a specific application service in a Multi-Path (Multi-Path) environment, and a system therefor.
A diagram of applying port mapping to achieve matching of MPTCP traffic (traffic) in a Multi-Path (Multi-Path) environment is shown in fig. 5. As shown in fig. 5, an MP-GW port mapping system divided by service flows according to an embodiment of the present invention includes a terminal 100 and an SAE-GW200 between the terminal 100 and an MP-GW10, wherein the terminal 100 generates MPTCP traffic (traffic) including a port number of an MP-GW10 corresponding to an IP address of an application server to be utilized, and transmits the MPTCP traffic to an MP-GW10 or receives the MPTCP traffic from the MP-GW 10. In this case, SAE-GW200 further includes an MPTCP traffic (traffic) matching 5-tuple filter provided independently of the above-described conventional 5-tuple filter for matching TCP traffic (traffic), and the MPTCP traffic (traffic) matching 5-tuple filter is used to provide different Policy (Policy) and Charging (Charging) for each service flow in a multipath environment, so that mapping information registered in the MPTCP traffic matching 5-tuple filter can be mapped to a port number of MP-GW10 included in the MPTCP traffic (traffic).
Specifically, the mapping information registered in the 5-tuple filter for MPTCP traffic (traffic) matching is information obtained by mapping the IP address of the application server 20 and the port number of the MP-GW10, as shown in fig. 5, a directory is registered in the 5-tuple filter for MPTCP traffic matching, and when the directory is an uplink (terminal- > MP-GW), including the IP address/port number of the terminal as the departure place, the IP address/port number of the MP-GW as the destination place, the protocol ID, and a downlink (MP-GW- > terminal), including an IP address/port number of an MP-GW as a departure place, an IP address/port number of a terminal as a destination place, a protocol ID, the directory is information on which application server 20 IP address the port number of the MP-GW forms a mapping.
Accordingly, SAE-GW200 may identify which service flow the MPTCP traffic (traffic) corresponds to (communicates with) which application server based on the port number of MP-GW10 forming a mapping with a 5-tuple filter by the MPTCP traffic (traffic) matching. In this case, the Quality of Service (QoS) and charging rule (charging rule) of the 5-tuple filter for MPTCP traffic matching are the same as those of the conventional 5-tuple filter for TCP traffic matching.
In one aspect, the MP-GW port mapping system according to an embodiment of the present invention further includes an MP Manager (MP-Manager)300, and if the MP Manager 300 receives a Policy (Policy) request message from the terminal 100, the MP Manager transmits a port list, which is a list obtained by mapping an application server IP address and a port number of the MP-GW10, to the terminal 100 through a Policy (Policy) response message.
Therefore, in order to determine the application server 20 corresponding to the service to be utilized, the terminal 100 specifies the port number of the MP-GW10 corresponding to the target application server 20 and establishes the session using the mapping information of the port list of the Policy (Policy) response message received in the above-described authentication process.
In the present invention, MP-GW10 is assigned different port numbers depending on application servers. Therefore, the terminal 100 includes the port number of the MP-GW10 corresponding to the target application server in MPTCP traffic (traffic) transmitted to the MP-GW10, and the MP-GW10 generates general TCP traffic based on the MPTCP traffic (traffic) received by the specific port and transmits it to the application server 20 corresponding to the port number, thereby generating a session between the terminal 100 and the application server.
A method for mapping MP-GW ports divided by service flows according to an embodiment of the present invention is described in detail with reference to fig. 5.
First, the terminal 100 sends a Policy (Policy) request message to the MP manager 300, and the MP manager 300 receives the Policy (Policy) request message, generates a Policy (Policy) response message, and sends the Policy (Policy) response message to the terminal 100, where the Policy (Policy) response message includes a port list obtained by mapping the IP address of the application server and the port number of the MP-GW 10. Through the above-described procedure, the MP manager 300 completes authentication of the terminal 100, after which the terminal 100 establishes an MPTCP session with the MP-GW10 for utilizing a specific application server.
Then, a step of transmitting a Multi-Path Transmission Control Protocol (MPTCP) traffic (traffic) including a port number of MP-GW10 corresponding to the application server IP address between terminal 100 and MP-GW10, and finally, a step of mapping the registered mapping information and the port number of MP-GW10 included in the MPTCP traffic in an MPTCP traffic matching tuple filter additionally provided in SAE-GW200 for providing different Policy (Policy) and Charging (Charging) for each service flow, thereby implementing MP-GW port mapping divided by service flows. In addition, the common TCP traffic is matched by the existing TCP traffic matching with 5-tuple filter.
Fig. 6 shows an MP-GW port directory divided by application servers issued from the MP manager 300 to the terminal 100, and a state of acting according to mapping information of the port directory. As described above, in the multipath environment, the service session is separately implemented with the MP-GW10 as a boundary, that is, the MPTCP traffic having the source IP address and port as the terminal 100 and the destination IP address and port as the MP-GW is performed between the terminal 100 and the MP-GW10, and the general TCP traffic having the destination IP address and port as the MP-GW and the destination IP address and port as the application server 20 is performed between the MP-GW and the application server 20.
As an embodiment, as shown in fig. 6, when the mapping information of a specific target application server 20 is set, the target application server information is set to "1.1.1/32: 1000", and one IP address 1.1.1.1 is mapped with the port number 1000 of the MP-GW 10. When terminal 100 transmits traffic (traffic) to application server IP address 1.1.1.1 using the mapping information, it sets TCP destination Port (dstport) of MP-GW10 to 1000 to transmit. Thus, MPTCP traffic transmitted to a specific port of MP-GW10 is converted into general TCP traffic (traffic) in MP-GW10 and transmitted to corresponding application server 20, thereby achieving a service.
In addition, it can be set that a plurality of target application servers form a mapping with one MP-GW port number. Referring to fig. 6, for example, the destination application server information is set to "2.2.2.0/24: 1001", and a plurality of destination application server addresses 2.2.2.1 to 2.2.2.254 are mapped to MP-GW port number 1001. Therefore, when terminal 100 transmits traffic (traffic) to destination application server addresses 2.2.2.1 to 2.2.2.254, it can set the TCP destination of MP-GW10 to 1001 and transmit the traffic.
Further, other traffic (traffic) is set to "0.0.0.0/0: 7000", and is set to be transmittable to default port number 7000 of MP-GW 10.
Fig. 7 is a process of applying port mapping on MPTCP, and illustrates a process of mapping flows (flows) of LTE and WiFi as MPTCP subflows (subflows) of the terminal 100 by a specific service.
As described above with reference to fig. 5, MP manager 300 allocates available specific port numbers of MP-GW10 by service flow and delivers a port list matching the MP-GW port numbers by service as a response to a Policy (Policy) request of terminal 100, terminal 100 establishes an MPTCP session with MP-GW10 based on the port number corresponding to the specific service using the service port number, at which time, if two subflows (subflows) of LTE and Wifi exist between terminal 100 and MP-GW10, the MPTCP session is established by the two subflows (subflows).
At this time, in MP-GW10, two sub-flows (subflows) thus dropped from one terminal 100 should be integrated into one specific TCP flow (external session part) of the reception service. For this purpose, a mapping table is required which simultaneously contains information of sub-streams (subflows).
Therefore, as shown in fig. 7, when the MP manager 300 receives a policy request message from a specific terminal, it sends a Session Mapping table (Session Mapping table) including IP address information of two sub-streams (LTE, WiFi) of the corresponding terminal, an IP address and port of a service (application) server, and IP address and port number information of the MP-GW10 allocated to the corresponding service stream to the MP-GW 10.
Therefore, when MP-GW10 receives an MPTCP Sub-service (Sub-traffic) from one terminal via each Sub-stream (Subflow) (LTE, WiFi), the two MPTCP Sub-services (Sub-traffic) are integrated with reference to the Session mapping table, converted to a general TCP service (traffic), and then transmitted to the target application server via an External Session (External Session), which is a general TCP Session.
The present invention is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention as claimed.
Description of the reference numerals
10：MP-GW
20: application server
100: terminal device
200：SAE-GW
300: MP manager
Claims (7)
1. An MP-GW port mapping method divided by service flows, which maps ports of an MP-GW by service flows formed between a terminal and an application server to enable utilization of a specific application service in a multipath environment, comprising:
step a), transmitting MPTCP traffic including the port number of the MP-GW corresponding to the IP address of the application server between the terminal and the MP-GW, and
step b), mapping the registered mapping information and the port number of the MP-GW included in the MPTCP service in a 5-tuple filter additionally arranged in an MPTCP service matching of SAE-GW, wherein the 5-tuple filter for MPTCP service matching is used for providing different strategies and charging according to service flows;
the mapping information registered in the 5-tuple filter for MPTCP service matching is information obtained by mapping the IP address of the application server and the port number of the MP-GW,
in the step b), a service flow of the MPTCP traffic is identified according to a port number of the MP-GW forming a mapping with a 5-tuple filter through the MPTCP traffic matching.
2. The MP-GW port mapping method divided by service flow as recited in claim 1, wherein,
prior to said step a), comprising:
step 1), the terminal sends a strategy request message to an MP manager,
and 2), when the MP manager receives the strategy request message, transmitting a port list to the terminal through a strategy response message, wherein the port list is obtained by mapping an application server IP address and a port number of the MP-GW.
3. The MP-GW port mapping method divided by service flow as recited in claim 2, wherein,
in the case that there are two sub-streams of LTE and Wifi between the terminal and the MP-GW, after the step 1), further comprising:
step 3), the MP manager transmits a session mapping table to the MP-GW, wherein the session mapping table comprises IP addresses, application server IP addresses and port numbers of two sub-flows (LTE and Wifi) of a terminal and IP addresses and port number information of the MP-GW allocated to corresponding service flows;
in the step a), when an MPTCP sub-service is transmitted from a terminal to an MP-GW through each sub-stream, i.e., LTE or Wifi, the MP-GW integrates each MPTCP sub-service transmitted through each sub-stream into one TCP service with reference to the session mapping table, and then transmits the TCP service to a target application server through a general TCP session, i.e., an external session.
4. An MP-GW port mapping system divided by service flows, which maps ports of an MP-GW by service flows formed between a terminal and an application server to enable utilization of a specific application service in a multipath environment, comprising:
a terminal transmitting/receiving MPTCP traffic including a port number of the MP-GW corresponding to the IP address of the application server to/from the MP-GW, and
an SAE-GW that is located between the terminal and the MP-GW and further includes a 5-tuple filter for MPTCP traffic matching, the 5-tuple filter for MPTCP traffic matching being used to provide different policies and charges per service flow, mapping information registered in the 5-tuple filter for MPTCP traffic matching forming a mapping with a port number of the MP-GW included in the MPTCP traffic;
the 5-tuple filter for MPTCP service matching in the SAE-GW is provided independently of a 5-tuple filter provided for matching TCP service, information obtained by mapping an IP address of an application server and a port number of an MP-GW is registered in the 5-tuple filter for MPTCP service matching,
the SAE-GW identifies a service flow of the MPTCP traffic according to a port number of the MP-GW forming a mapping with a 5-tuple filter through the MPTCP traffic matching.
5. The MP-GW port mapping system divided by service flow as recited in claim 4,
the MPTCP service matching 5-tuple filter and the TCP service matching 5-tuple filter have the same service quality and charging rule.
6. The MP-GW port mapping system defined as claim 4, further comprising an MP manager, wherein when the MP manager receives a policy request message from the terminal, the MP manager transmits a port list to the terminal through a policy reply message, the port list being a list obtained by mapping an application server IP address with a port number of an MP-GW.
7. The MP-GW port mapping system divided by service flow as recited in claim 6,
in case that there are two sub-streams of LTE and Wifi between the terminal and the MP-GW,
when the MP manager receives a policy request message from the terminal, it transmits a session mapping table to an MP-GW, the session mapping table including IP addresses, application server IP addresses and port numbers of two sub-streams, LTE and Wifi, for the terminal and IP addresses and port number information of the MP-GW allocated to a corresponding service stream,
and when the MP-GW receives the MPTCP sub-services from the terminal through the sub-streams, namely LTE and Wifi, the MP-GW integrates the two MPTCP sub-services into one TCP service by referring to the session mapping table and transmits the TCP service to a target application server through a general TCP session, namely an external session.
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| KR1020160082732A KR101769344B1 (en) | 2016-06-30 | 2016-06-30 | System and method for mapping a port of MP-GW(MPTCP Proxy GateWay) for each service flow in the multi-path environment |
| PCT/KR2016/008126 WO2018004057A1 (en) | 2016-06-30 | 2016-07-26 | Method and system for mapping mp-gw port for each service flow in multi-path environment |
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| KR102648720B1 (en) * | 2017-12-20 | 2024-03-15 | 주식회사 케이티 | Traffic transmission system based on dynamic tunneling communication, and signaling method of the same |
| KR102304202B1 (en) * | 2019-10-31 | 2021-09-23 | 에스케이텔레콤 주식회사 | Data relay device and data relay method, relay management device |
| CN113037657B (en) * | 2021-03-23 | 2022-09-06 | 北京汇钧科技有限公司 | Traffic scheduling method and device, electronic equipment and computer readable medium |
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| KR101769344B1 (en) | 2017-08-21 |
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