KR102286332B1 - Method and Apparatus for Effective Traffic Control in Mobile Communication System - Google Patents

Abstract

The present invention redirects user traffic based on a specific rule or condition in advance through a traffic offloading technique in the environment of a next-generation mobile communication system to prevent overload of a base station or Evolved Packet Core (EPC) on the network. It relates to an efficient traffic control method and apparatus capable of maximizing resource utilization efficiency by optimizing overload control so as to improve quality of service (QoS) by ensuring service continuity and improving system performance.

Description

Method and Apparatus for Effective Traffic Control in Mobile Communication System

The present invention relates to a method and apparatus for controlling traffic in a mobile communication system, and more particularly, by optimizing overload control by maximizing resource utilization efficiency of the mobile communication system to improve quality (QoS) and system performance of next-generation mobile communication services It relates to an efficient traffic control method and apparatus that can

Recently, due to the advent of mobile devices such as smartphones and tablet PCs, data traffic is increasing explosively. Since mobile data traffic using the LTE network is transmitted through the LTE core network, Evolved Packet Core (EPC), the increase in mobile data traffic causes traffic overload of the core network. In the next-generation mobile communication system, signaling and traffic congestion are expected to be incomparable to that of previous communications. It evolves into a system suitable for high-speed/large-capacity data communication with construction takes place According to the Cisco Visual Networking Index Global Mobile Data Forecast, data traffic has exploded with the advent of smart TVs and mobile devices such as smartphones and tablet PCs in recent years. It is expected to increase by more than 1000 times compared to the previous year, which means that it can cause traffic overload in the network. As described above, if the network overload occurs due to the congestion of signaling and traffic in the wireless communication network, it becomes impossible to provide any more services. In this case, all existing services are cut off, and the quality of service (QoS) of the system is deteriorated.

As a treatment method for overload occurrence in the conventional mobile communication system, in order to maintain service continuity, the on-off-based overload control method for the network and the traffic in which the service is in progress immediately before entering the off-state mode of the network must be How to do over, etc. In the conventional on-off-based overload control method, in consideration of the traffic distribution of each network, when a network other than the overloaded network has only traffic below a certain threshold, a method of controlling the traffic through a method of turning off the overloaded network use. An important point here is that there should not be a problem of a coverage hole, and a tradeoff for an increase in power consumption of a coverage cell to solve this problem must be considered. Conventionally, as a solution to this problem, the cell breathing technique that increases or decreases the radius of the cell and the cooperative communication with neighboring cells (CoMP) are supplemented. There may be cases where service continuity or QoS cannot be guaranteed due to an instantaneous increase in signaling and traffic.

However, in these conventional methods, continuity cannot be guaranteed due to a hole coverage (HC) problem, which is a phenomenon in which access to any cell is not possible when a specific cell or network is in an off state, or a handover is performed. Accordingly, there is a problem of increased signaling. In order to solve these problems, methods for solving the HC problem that may occur in the cell boundary area by extending the cell radius have been proposed in some studies. A control technique is needed.

Therefore, the present invention has been devised to solve the above problems, and an object of the present invention is to redirect user traffic based on a specific rule or condition before overload occurs through a traffic offloading technique in an environment of a next-generation mobile communication system. By optimizing overload control to prevent overload of base stations or Evolved Packet Core (EPC) on the network by redirecting, the efficiency of resource utilization can be maximized, and service continuity is ensured to improve quality of service (QoS) and improve system performance. It is to provide an efficient traffic control method and apparatus that can

First, to summarize the features of the present invention, the traffic control method in the traffic control apparatus on a mobile communication network according to an aspect of the present invention for achieving the above object is to receive a packet from a user terminal and LIPA ( Determining any one of a Local IP Access) offloading method, a CN (Core Network) traffic processing method, and a Selected IP Traffic Offload (SIPTO) offloading method, wherein the LIPA offloading It is first determined whether traffic processing according to the method is possible, and then after determining whether traffic processing according to the traffic processing method to the CN is necessarily required, it is determined whether traffic processing according to the SIPTO offloading method is possible characterized by determining.

In the traffic processing according to the LIPA offloading scheme, the traffic control device provided in the local network device that receives the packet does not go through the CN, but is transferred to another device in the local network or an external network device connected to the local network device without going through the CN. send the packet

In the traffic processing according to the traffic processing method to the CN, the packet, which must be transmitted to the CN, is transmitted to the CN without offloading.

In the traffic processing according to the SIPTO offloading method, the traffic control device provided in the macro network, the local network, or the device of the core network that receives the packet further refers to reference information registered in advance in the server of the core network. The packet is transmitted to the corresponding target network device by selecting a redirect path.

The reference information includes SIPTO offloading availability information, network load information, and weight information and priority information according to each user's offloading preference. The load of the network includes the traffic load of the macro base station and the core network.

In the traffic processing according to the SIPTO offloading method, an offloading score for packets received from user terminals according to weight information for a plurality of parameters according to the offloading preference for each user and respective priority information corresponding thereto is calculated, and SIPTO offloading is performed on the packets according to the score ranking and transmitted. The plurality of parameters include a communication fee, real-time packet availability, or a transmission rate.

In addition, an apparatus for controlling traffic on a mobile communication network according to another aspect of the present invention receives a packet from a user terminal, and based on header information, a LIPA (Local IP Access) offloading method, and a CN (Core Network) traffic processing method And SIPTO (Selected IP Traffic Offload) traffic check unit for determining any one of the traffic processing method of the offloading method; and a LIPA traffic processing unit, a CN traffic processing unit, and a SIPTO traffic processing unit for processing traffic in a corresponding manner according to the determination of the traffic verification unit, wherein the traffic verification unit determines whether traffic processing according to the LIPA offloading method is possible It is determined first, and then, after determining whether traffic processing according to the traffic processing method to the CN is necessarily required, it is determined whether traffic processing according to the SIPTO offloading method is possible.

The LIPA traffic processing unit transmits the packet from the traffic control device provided in the local network device receiving the packet to another device in the local network or an external network device connected to the local network device without going through the CN.

The CN traffic processing unit transmits the packet, which must be transmitted to the CN, to the CN without offloading.

The SIPTO traffic processing unit selects a redirect path by further referring to reference information registered in advance in the server of the core network in the traffic control device provided in the device of the macro network, the local network, or the core network that receives the packet. The packet is transmitted to the corresponding target network device.

The reference information includes SIPTO offloading availability information, network load information, and weight information and priority information according to each user's offloading preference. The load of the network includes the traffic load of the macro base station and the core network.

The SIPTO traffic processing unit calculates an offloading score for packets received from user terminals according to weight information for a plurality of parameters according to the offloading preference for each user and priority information corresponding thereto, SIPTO offloading is performed on the packets according to the order and transmitted.

The plurality of parameters include a communication fee, real-time packet availability, or a transmission rate.

According to an efficient traffic control method and apparatus for a next-generation mobile communication system environment according to the present invention, the user traffic is redirected based on a specific rule or condition in advance through a traffic offloading technique before overload occurs to a base station or EPC on a network. Overload such as (Evolved Packet Core) can be prevented. For example, since mobile data traffic using an LTE network is transmitted through an LTE core network, an Evolved Packet Core (EPC), an increase in mobile data traffic may cause a traffic overload of the core network. It is a technology that offloads traffic to the core network by utilizing small cells introduced to eliminate shadow areas. By using LIPA (Local IP Access)/SIPTO (Selected IP Traffic Offload) techniques, traffic flows through the L-GW without going through the EPC. It is transmitted directly to the local network such as the Home/Enterprise network or the Internet through the system, so that overload occurrence can be prevented in advance through load distribution of the system.

In addition, in the present invention, Cost (charge), Delay (real-time or not), Considering bandwidth preference and traffic priority, the offloading score (S= Pc *Wc + Pd * Wd + Pr * Wr) is calculated for each traffic, and offloading is performed from the traffic with the highest score. In this way, it is possible to classify according to the type and function of traffic communicated through the core network and provide an optimal traffic path to alleviate network overload and improve traffic processing efficiency to provide service continuity without performing handover. This has the effect of improving the quality of service (QoS) of the system.

1 is a diagram for explaining the concept of a traffic offloading technique according to an embodiment of the present invention.
2 is a view for explaining a mobile communication system environment for realizing the LIPA / SIPTO function according to an embodiment of the present invention.
3 is a flowchart illustrating a traffic control process in a mobile communication system according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. In this case, the same components in each drawing are denoted by the same reference numerals as much as possible. In addition, detailed descriptions of already known functions and/or configurations will be omitted. The content disclosed below will focus on parts necessary for understanding operations according to various embodiments, and descriptions of elements that may obscure the gist of the description will be omitted. Also, some components in the drawings may be exaggerated, omitted, or schematically illustrated. The size of each component does not fully reflect the actual size, so the contents described herein are not limited by the relative size or spacing of the components drawn in each drawing.

1 is a diagram for explaining the concept of a traffic offloading technique according to an embodiment of the present invention.

1, in the next-generation mobile communication system, a user terminal (UE) accesses a server on the core network of a communication service provider through a backhaul or the Internet according to the relay of a macro base station (eNB) in a macro cell to provide a mobile communication service In addition to allowing a user terminal (UE) to communicate through backhaul or the Internet according to the relay of a home base station (H(e)NB) in a local network such as a home/enterprise network, It supports access to a server on the operator's core network to receive mobile communication services. User terminals (UE) include mobile devices such as smartphones and tablet PCs. In addition, protocols such as WCDMA, LTE, WiFi, WiBro, etc. It may include a desktop PC, a notebook PC, and other various electronic devices capable of mobile communication according to the present invention.

The next-generation mobile communication system is a communication system capable of high-speed data transmission and IP (Internet Protocol)-based service according to technology development for performance and capacity increase. High data rate, low latency ), and packet-optimized wireless access technology, and provides users with ultra-high-speed broadband-based mobile multimedia packet services at low rates. In the next-generation mobile communication service, data traffic is expected to increase explosively due to the advent of mobile devices such as smartphones and tablet PCs. Since the data traffic of the user terminal (UE) for mobile communication service is transmitted through the core network of the telecommunication service provider such as the Evolved Packet Core (EPC), which is the LTE (Long Term Evolution) core network, the increase in mobile data traffic increases the traffic overload of the core network. generate

Therefore, in the present invention, by using a technology for offloading traffic to the core network by utilizing femtocells and small cells introduced to increase cell capacity and eliminate shadow areas, overload occurrence through load distribution of the system can be prevented in advance. made it possible That is, in the present invention, based on LIPA (Local IP Access)/SIPTO (Selected IP Traffic Offload), the load of the core network such as EPC and the home/enterprise network to be redirected according to offloading, such as the local network or the Internet Through the offloading technique according to the load and offloading preference, through the L-GW (Local Gateway) such as H(e)NB, without going through the EPC, by redirecting the traffic to be directly delivered to the home/business network or the Internet, It was designed to prevent overload in advance through load distribution of the system. In addition, it is possible to provide service continuity without performing handover as much as possible, and it is possible to prevent an increase in signaling and traffic congestion that occur during handover, and to ensure service continuity through efficient use of radio resources. guarantee and improve system performance.

The offloading technique may have various forms, as shown in FIG. 1 , depending on the location of the user terminal (UE), a control method in a macro base station (eNB) or a home base station (H(e)NB), a network configuration method, etc. The form may be different, and a combination of these forms may provide various mobile communication services. In particular, since the next-generation mobile communication system is operated in the same system or in the overlapping cell environment of HetNet (Heterogeneous Networks), the load is considerably high due to information exchange between different systems or networks of the same system in order to control overload. For the network, it is necessary to study the system operation method technology to avoid overload. Until now, there have been many proposals for this technique, but it is at a level that effective results can be obtained only after considering and supplementing various problems for commercialization as an initial level of overload control technology.

The present invention intends to propose an efficient control method for controlling overload of a network to ensure service continuity by improving the mobile communication service quality of the system. The offloading technique is not only very useful in terms of signaling and traffic load distribution, but also actively utilizes this characteristic in the overload control method of the mobile communication system to prevent problems due to overload of the mobile communication system in advance and improve system performance. can bring about improvement. As an offloading technique, various methods such as LIPA, SIPTO, and IFOM (IP Flow Mobility) techniques can be applied. .

2 is a view for explaining a mobile communication system environment for realizing the LIPA / SIPTO function according to an embodiment of the present invention.

High-speed, large-capacity data processing based on all IP for mobile communication services such as LTE means an increase in the load on the packet data network. 3GPP (3rd Generation Partnership Project) defined data offloading to solve this problem, and data offloading was introduced in 3GPP Rel-10. A rapid increase in IP data for mobile communication services causes network congestion. Innovative applications in shared spaces such as novel networking, media sharing, and tablets use huge amounts of data. The rapid increase in data usage for mobile communication services causes an overload problem that is operated when the capacity limit of the cellular network is almost reached, and network operators are constantly looking for ideas and methods to solve this problem. One of the various methods is a data offloading technique that uses an intelligent redirect of some data of a user based on a specific rule or condition, which has the effect of overcoming overloading and improving performance.

In the early days of data offloading in cellular networks, in most cases, the target network used a WiFi network (using IEEE802.11 family of protocols) using a different protocol. There were many restrictions, such as increasing. Recently, I became interested again, and in 3GPP, a femtocell with a concept similar to a macro cell was officially defined. Femtocells are similar to WiFi (Wireless Fidelity), but have many advantages.

When data offloading is not applied, the user terminal (UE) through backhaul or the Internet, MME (Mobility Management Entity), SGW (Serving Gateway), PGW (PDN Gateway), PCRF on the core network such as EPC (Policy and Charging Rules Function), HSS (Home Subscriber Server), etc., according to control signals (eg, S5, S6a, S11, SGi, Rx, Gx, etc.), by accessing the service server on the core network, access to the core network Although a burst of IP data traffic is caused, the data capacity in the EPC will potentially increase because the data rate is increased by the data offloading technique using a femtocell or a small cell. In 3GPP, LIPA and SIPTO are handled in the LIPA_SIPTO work item.

In LIPA (Local IP Access), a user terminal (UE) connected to a home base station (H(e)NB) in a local network 210, such as a home/enterprise network, does not go through a macro cell, but the same H (e) A method of transferring data to a local network device (eg, other home base station, femtocell base station, gateway, server, etc.) connected to the NB is used. In addition, LIPA also performs a function of connecting the user terminal (UE) to any external network device (eg, the Internet, the core network 220 such as EPC, gateway, server, etc.) connected to the local network. Registration of connection configuration with a user terminal (UE) and signaling of a packet data network (PDN) configuration are performed in a public land mobile network (PLMN) selected by the user terminal (UE). Such a LIPA function can be performed in a RAN (Radio Access Network) node 211, such as H(e)NB, and is not performed in a macrocell. Traffic offloading is done in APN (Access Point Network) and CSG (Closed Subscriber Group) units. LIPA was introduced in 3GPP Rel.9, and working activities are continuing on the system structure for realizing its functions and activities such as Rel.10 and Rel.11. As a typical example, when Laptops (notebook PCs, tablet PCs, etc.), Tablets, Printers, Servers, and Video Conferencing Units on an IP (Internet Protocol)-based wireless network and IP-based phones on the Internet are connected, the network connects them all. For this purpose, it can be built using a gateway of a private network such as a home/corporate network. If a user wants to print from a laptop, LIPA can support routing to request a printer internally. In addition, the e-mail can also be transmitted directly through a private gateway or the like.

Selected IP Traffic Offload (SIPTO) is a RAN node 211 such as H(e)NB, a base station (eNB) on a cellular network, and a user terminal ( A method of transferring data to a target network device (eg, other home base station, gateway, femtocell base station, server, etc.) use the SIPTO is generally generated by the mobility of the user terminal (UE), but may also be generated according to the concentration of traffic or operation rules (Rule) of the network. SIPTO was introduced in 3GPP Rel.10. For example, in a performance hall, a telecommunication operator can avoid potential network traffic overload by selectively processing some or all traffic generated in the performance hall to offload to a target network device such as a local gateway, and users can enjoy higher quality service can be obtained.

LIPA is only applicable to private networks, but SIPTO is applicable to macro networks as well as private networks. 3GPP is largely divided into two types of architecture from a breakout point of view. From the LIPA/SIPTO point of view, breakout means the point where data offloading occurs. Breakout may be a private network (device) such as a home network/enterprise network, etc. when LIPA and SIPTO cover, and when SIPTO of a macro cell and SIPTO of some femtocells covers the RAN node 211 or higher RAN It can be a device in a local network or a core network, such as a node.

3 is a flowchart illustrating a traffic control process in a mobile communication system according to an embodiment of the present invention. That is, hereinafter, one of the present invention provided in a device of a local network (or private network) such as a RAN node 211 such as a base station eNB of a macro cell on a network, a home base station H(e)NB, or a device of a core network such as an EPC. An algorithm for determining whether a traffic control apparatus for offloading according to an embodiment and for processing an offloading according to an offloading technique is described will be described. As shown in FIG. 4 , the traffic control apparatus 400 on the network may include a traffic check unit 410 , a LIPA traffic processor 420 , a CN traffic processor 430 , and a SIPTO traffic processor 440 .

First, the traffic check unit 410 periodically checks whether there is a packet received from the user terminal (UE) (S110), and if there is a received packet, the packet destination IP address, traffic type, function information, etc. of the received packet Based on the header information, according to a predetermined policy, it is determined whether the traffic is processed by any of the LIPA offloading method, the CN (Core Network core network) traffic processing method, or the SIPTO offloading method (S111).

In the present invention, IP data bursting for access to the core network by processing the traffic so that packets received from the user terminal (UE) are delivered directly to the local network or the Internet, such as the home/business network, preferably without going through the core network. Since the packet overload (load) of the network (HeNB, EPC, etc.) is reduced, the traffic check unit 410 of the RAN node 211, such as H(e)NB, may It is first determined whether or not traffic should be processed using the LIPA traffic processing method (S120). For example, if the traffic check unit 410 determines that traffic processing is possible by the LIPA offloading method according to the packet header information, the LIPA traffic processing unit 420 is configured in the RAN node 211 such as H(e)NB. Local network device (eg, other home base station, femtocell base station, gateway, server, etc.) or any external network device connected to the RAN node 211 (eg, the core network 220 such as the Internet, EPC, gateway, server, etc.) The traffic processing by the LIPA offloading method of forwarding the received packet is performed (S121). In the traffic processing by the LIPA offloading method, the load on the network can be reduced by directly transferring traffic destined for a device in a private network, such as a home/corporate network, without passing through the core network. Packets transmitted by the LIPA offloading method do not pass through cellular network elements such as macro cells, but pass through the above private network devices to other devices in the private network or devices on the public Internet.

Next, when the traffic check unit 410 determines that the traffic processing corresponds to the CN traffic processing method according to the packet header information (S130), the CN traffic processing unit 430 sends the received packet to the destination device of the core network such as the EPC. Traffic processing is performed to be delivered (S131). In a mobile communication system, in general, most traffic is initially set and registered through the core network, and traffic that must be delivered to the core network must be processed to pass through the core network. In other words, traffic generated during initial connection, traffic to the IMS (IP Multimedia Subsystem) network, and traffic whose source/destination IP address is a device of the core network must go to the core network without offloading, so first, only the CN It checks whether it is traffic and if there is traffic that must go to the core network, the traffic to the core network is processed according to the existing general procedure.

As above, LIPA offloading and traffic processing to the CN are processed first, and the traffic check unit 410 processes the received packet in the SIPTO offloading method for the remaining traffic according to the packet header information and the following reference information. (S140), if SIPTO offloading processing is possible, the SIPTO traffic processing unit 440 is another target network device closest to the user terminal (UE) in the RAN node 211 such as H(e)NB (eg, other home The traffic processing is performed so that the HeNB or EPC can breakout by the SIPTO offloading method that redirects the received packets to a base station, gateway, femtocell base station, Internet server, etc.) (S141 to S145).

The traffic check unit 410 refers to reference information registered in advance in servers such as HSS, HeNB Management System (HeMS), OAM (Operations, Administration, Maintenance), etc. of the core network at any time to process the traffic in the SIPTO offloading method. It can be determined whether or not (S140). As reference information registered in the server in advance, SIPTO offloading availability information, load information of the network (core network such as macro base station (eNB) or EPC), weighting information according to each user's offloading preference, priority information, etc. may be included.

According to SIPTO offloading, traffic can be processed by selecting various routes according to the logically or topologically configured structure of the network. However, if the traffic check unit 410 checks whether SIPTO offloading is possible according to this reference information (S140), it is determined that the SIPTO offloading is impossible, or if the SIPTO offloading path cannot be set instantaneously, the received Since a service must be processed for traffic, it inevitably determines traffic processing through the core network, and the CN traffic processing unit 430 performs traffic processing so that received packets are delivered to a destination device of the core network, such as EPC (S131) .

When the traffic check unit 410 determines whether SIPTO offloading is possible according to this reference information and determines that SIPTO offloading is possible (S140), the SIPTO traffic processing unit 440 first performs an offloading according to the purpose of offloading. SIPTO offloading target packet to be processed with the highest priority for packets of user terminals by referring to network load (traffic load) information, weighting information according to each user's offloading preference, priority information, etc. according to the policy , selects an optimal redirect path for SIPTO, performs traffic processing on received packets, and performs SIPTO offloading for all remaining traffic (S141 to S145).

For example, according to the user's preference, when the goal is to save communication charges, a policy can be set that prioritizes offloading the traffic of users who consume a lot of free data. Offloading traffic can be determined as a policy, and after synthesizing and judging these things, an offloading path for SIPTO is selected and processed, and SIPTO offloading can be performed for all remaining traffic.

To this end, the SIPTO traffic processing unit 440 checks the weighting information and priority information according to each user's offloading preference (S141), and returns the offloading score (S) reflecting this as in [Equation 1] Calculate (S142).

[Equation 1]

S= Pc*Wc + Pd*Wd + Pr*Wr

The SIPTO traffic processing unit 440 is a weight (Wc) for the communication fee, a weight (Wd) for whether a real-time packet that can be classified according to a predetermined policy (or whether a delay is possible), a weight for the transmission rate (Bandwidth) ( Weight information for a plurality of parameters according to each user's offloading preference such as Wr), the traffic priority (Pc) for the communication fee determined according to each preference criterion, the traffic priority (Pd) for the real-time packet or not, the transmission rate A high offloading score (S) is given to a packet with a high weight and high priority according to priority information such as the traffic priority (Pr) for the . The weights or priorities defined herein may be variously adjusted at any time by a network operator according to a predetermined classification class based on subscriber information of a user terminal (UE) in consideration of the current state of the system.

After calculating the offloading score (S) in this way, the SIPTO traffic processing unit 440 performs traffic processing according to SIPTO offloading from a packet having a high offloading score (S) (S143), and SIPTO off for all remaining traffic Loading is performed (S144). SIPTO offloading processing according to such an offloading score (S) can be performed when the network load is below the threshold, and when the network load exceeds the threshold, traffic generated in the local network is transferred according to SIPTO offloading regardless of the network. It is also possible to perform traffic processing.

In this way, by applying LIPA/SIPTO-based offloading technology that provides an optimal traffic path by classifying according to the type and function of the traffic communicated through the core network, the overload of the network is alleviated and the traffic processing efficiency is improved. It can bring about the effect of improving the quality of service (QoS) of the system.

The above components or their functions for traffic control according to the LIPA/SIPTO-based offloading algorithm in the traffic control apparatus 400 on the network according to an embodiment of the present invention as described above are hardware (eg, semiconductor processor), It may be implemented in software, or a combination thereof. Furthermore, the above components or their functions according to an embodiment of the present invention are implemented as computer- or processor-readable codes in a computer- or processor-readable recording medium when executed by one or more computers or processors. it is possible to do The processor-readable recording medium includes all types of recording devices in which data readable by the processor is stored. Examples of the processor-readable recording medium include a ROM, a RAM, a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, and the like, and also includes those implemented in the form of a carrier wave such as transmission through the Internet. In addition, the processor-readable recording medium is distributed in a network-connected computer system, so that the processor-readable code can be stored and executed in a distributed manner.

As described above, the present invention has been described with specific matters such as specific components and limited embodiments and drawings, but these are provided to help a more general understanding of the present invention, and the present invention is not limited to the above embodiments. , various modifications and variations will be possible without departing from the essential characteristics of the present invention by those of ordinary skill in the art to which the present invention pertains. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all technical ideas with equivalent or equivalent modifications to the claims as well as the claims to be described later are included in the scope of the present invention. should be interpreted as

local network (210)
RAN (Radio Access Network) Node (211)
core network (220)
Local IP Access (LIPA)
Selected IP Traffic Offload (SIPTO)
traffic control device 400
Traffic check unit 410
LIPA traffic processing unit 420
CN traffic processing unit 430
SIPTO traffic processing unit (440)

Claims (10)

A method of controlling traffic in a mobile communication network, comprising:
determining, by the traffic control apparatus, a traffic processing method based on header information of a packet received from the user terminal, wherein the header information includes a destination address and a traffic type of the packet; and
processing, by the traffic control device, the received packet according to the determined traffic processing method;
including,
The step of determining the traffic processing method is
First, determining whether processing is possible in a LIPA (Local IP Access) offloading method based on header information of the packet;
determining whether a traffic processing scheme to a CN (Core Network) is required when the packet is not processable by the LIPA offloading scheme; and
If the packet cannot be processed by the LIPA offloading method and the traffic processing method to the CN is not required, the packet can be processed in the SIPTO (Selected IP Traffic Offload) offloading method based on the reference information registered in advance step to judge
Including, the reference information includes SIPTO offloading availability information, network load information, weight information according to each user's offloading preference, and priority information,
In the step of processing the packet, if it is determined that processing is possible in the SIPTO offloading method, the highest priority among the packets by referring to the load information of the network, weight information according to the offloading preference for each user, and the priority information Selecting a SIPTO offloading target packet to be processed as , and selecting an optimal redirect path for SIPTO, and redirecting the selected packet to the selected redirect path. According to claim 1,
The determining of the traffic processing method includes determining that the LIPA offloading method can be processed when the destination address of the header information of the packet is an address of a device of a private network,
In the step of processing the packet, if it is determined that the packet can be processed by the LIPA offloading method, the packet is transferred to another device in the local network or an external network device connected to the local network device from which the packet is received without going through the CN. sending the packet;
and the traffic control device is located in the local network. According to claim 1,
The step of determining the traffic processing method is
When the traffic type included in the header information of the packet is one of traffic generated during initial access, traffic to an IMS (IP Multimedia Subsystem) network, or the destination address is a device of a CN, the traffic processing method to the CN is determining that it is required,
The step of processing the packet includes transmitting the packet to the CN without offloading when the traffic processing method to the CN is required. According to claim 1,
The traffic control device is located in any one of a macro network, a local network, or a CN for receiving the packet, traffic control method. delete According to claim 1,
The step of processing the packet,
calculating an offloading score for the received packet according to weight information on a plurality of parameters according to the offloading preference for each user and priority information corresponding thereto; and
When the load of the network is lower than a preset threshold, processing the packet according to the SIPTO offloading scheme according to the offloading score ranking
includes,
The plurality of parameters include at least one of a communication fee, real-time packet availability, and a transmission rate. A device for controlling traffic in a mobile communication network, comprising:
a traffic check unit configured to determine a traffic processing method based on header information of a packet received from the terminal, wherein the header information includes a destination address and a traffic type of the packet;
a LIPA traffic processing unit configured to process the received packet in a LIPA (Local IP Access) offloading method according to a determination result of the traffic check unit;
a CN traffic processing unit configured to process the received packet in a traffic processing method of forwarding the received packet to a CN (Core Network) according to a determination result of the traffic verification unit; and
SIPTO traffic processing unit configured to process the received packet in a Selected IP Traffic Offload (SIPTO) offloading method according to the determination result of the traffic confirmation unit
including,
First, the traffic check unit prioritizes whether traffic processing according to the LIPA offloading method is possible, and then, if the packet cannot be processed by the LIPA offloading method, the traffic processing method is delivered to the CN After determining whether traffic processing according to It is configured to determine whether traffic processing according to the loading method is possible, and the reference information includes SIPTO offloading availability information, network load information, weight information according to each user's offloading preference, and priority information,
When it is determined that the SIPTO traffic processing unit can be processed in the SIPTO offloading method, it is processed with the highest priority among the packets by referring to the load information of the network, weight information according to the offloading preference for each user, and the priority information Select a SIPTO offloading target packet to be performed, select an optimal redirect path for SIPTO, and redirect the selected packet to the selected redirect path. 8. The method of claim 7,
The traffic check unit is configured to determine that the LIPA offloading method can be processed when the destination address of the header information of the packet is the address of the device of the private network,
When it is determined that the LIPA traffic processing unit can process the LIPA offloading method, the packet is transmitted to another device in the local network or an external network device connected to the local network device from which the packet is received without passing through the CN. A traffic control device, configured to: delete 8. The method of claim 7,
Specifically, the SIPTO traffic processing unit calculates an offloading score for the received packet according to weight information for a plurality of parameters according to the offloading preference for each user and each priority information corresponding thereto, and the load of the network is configured to process the packet according to the SIPTO offloading scheme according to the offloading score rank when is lower than a preset threshold,
The plurality of parameters includes at least one of a communication fee, real-time packet availability, and a transmission rate.

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