KR20150029975A - Method for reducing network load at the same data transfer and mobile telecommunication system for the same - Google Patents

Abstract

Disclosed is a method for reducing load on a network when an application server transmits the same data to a group to which a plurality of terminals connected to a network (for example, an EPC network) belongs, and a mobile communication system therefor. According to this method and system, the APP gateway receives control data necessary for group management and user data to be transmitted to each terminal from an application server, checks whether the user data is duplicated, and transmits IP information of terminals to which duplicate user data is transmitted And then transmits the common user data to be transmitted to the terminals belonging to the corresponding group to the EPC network together with the group information and the information of the terminals belonging to the group.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for reducing a network load at the time of transmitting the same data, and a mobile communication system for the same.

The present invention relates to a mobile communication technology, and more particularly, to a method for reducing a network load when an application server transmits the same data to a group to which a plurality of terminals connected to a network (for example, an EPC network) belongs.

Recently, due to the rapid development of communication, computer network and semiconductor technology, not only various services using wireless communication networks have been provided, but the demand of users has been increasing day by day, and the global wireless Internet service market has been exploding Trend. Accordingly, a service provided by a mobile communication system using a wireless communication network is being developed not only as a voice service, but also as a multimedia communication service for transmitting various data.

Recently, with the increase of smart phones and the demand for data traffic, mobile operators are investing equipment and technology considering the system part and the influence to accommodate the increased data traffic in various ways.

One example of a system load may be the problem of duplicate data transmission of download traffic. That is, when the application server transmits the same data to a plurality of mobile communication terminals (User Equipment) connected in an EPC (Evolved Packet Core) network, transmission and reception of the same packet of the user data occur in the same network node redundantly . In particular, the more UEs that need to receive the same data, and also the unnecessary load on the network when a large number of UEs are connected to a small number of base stations (eNodeBs).

In this way, conventionally, when the same data is transmitted to a plurality of UEs connected to the EPC network in the application server, since the EPC network does not check whether the user data is duplicated in the transmitted packet, There is a problem that unnecessary load can be given.

Korean Patent Laid-Open Publication No. 10-2011-0075098 (published on July 6, 2011)

It is an object of the present invention to provide a method for reducing load on a network when an application server transmits the same data to a group to which a plurality of terminals connected to a network (for example, an EPC network) belongs and a mobile communication system therefor .

According to an aspect of the present invention, there is provided a method of reducing a network load when an application server transmits the same data to a group to which a plurality of terminals connected to a network (for example, an EPC network) belongs, and a mobile communication system therefor . According to this method and system, the APP gateway receives control data necessary for group management and user data to be transmitted to each terminal from an application server, checks whether the user data is duplicated, and transmits IP information of terminals to which duplicate user data is transmitted And then transmits the common user data to be transmitted to the terminals belonging to the corresponding group to the EPC network together with the group information and the information of the terminals belonging to the group.

According to the present invention, there is an advantage that an application server connected to the IP network can transmit the same data only once to the P-GW of a specific EPC network without repeatedly transmitting, thereby reducing the load on the IP network. In addition, there is an advantage that the load of the EPC network can be reduced by transmitting only the same data from the P-GW to the eNodeB of the EPC network only once without transmitting the same data many times.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an exemplary mobile communication network in which the present invention can be implemented; Fig.
2 is a diagram showing an embodiment of an EPC network to which the present invention can be applied;
3 is a diagram showing another embodiment of an EPC network to which the present invention can be applied;
4 is a diagram showing a case where duplicate packets of the same user data occur.
5 is a diagram illustrating a configuration of an EPC network for reducing a network load when transmitting the same data according to the present invention.
6 is a diagram specifically illustrating a method of reducing a network load when transmitting the same data according to the first embodiment of the present invention.
FIG. 7 is a diagram specifically illustrating a method of reducing a network load when transmitting the same data according to a second embodiment of the present invention; FIG.
FIG. 8 is a diagram specifically illustrating a method of reducing a network load when transmitting the same data according to a second embodiment of the present invention; FIG.
FIG. 9 is a diagram specifically illustrating a method of reducing a network load when transmitting the same data according to the second to third embodiments of the present invention. FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, well-known functions or constructions will not be described in detail if they obscure the subject matter of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram showing a configuration of an exemplary mobile communication network in which the present invention can be implemented. Fig.

In one embodiment, the mobile communication network includes a wireless network such as a Global System for Mobile communication (GSM), a 2G wireless communication network such as CDMA, an LTE network, a wireless Internet such as WiFi, a Wireless Broadband Internet (WiBro), and a World Interoperability for Microwave Access (E.g., 3G mobile communication network such as WCDMA or CDMA2000, High Speed Downlink Packet Access (HSDPA) or 3.5G mobile communication network such as HSUPA (High Speed Uplink Packet Access), or the like (4G mobile communication network currently under service), macro-base station (macro eNodeB), micro-base station (Pico eNodeB, Home-eNodeB), and any other mobile communication network including the terminal UE as its constituent elements. It is not. Hereinafter, an E-UTRAN (Evolved Universal Terrestrial Radio Access Network) as a radio access network of LTE will be mainly described.

As shown in FIG. 1, the mobile communication network may include one or more network cells, and may include a HetNet environment in which different kinds of network cells may be mixed in a mobile communication network. The mobile communication network includes miniature base stations (Pico eNodeB, Home-eNodeB, relay, etc.) 11 to 15, 21 to 23, and the like, which manage small-sized network cells (e.g., 'small cells' such as picocells, femtocells, (MAC) eNodeBs 10, 20, and 30, a UE 40, and SON (Self Organizing & Optimizing) devices 40 and 40 for managing a wide range of cells (e.g., 'macro cells' A Mobility Management Entity (MME) 60, an S-GW (Serving Gateway) 80, and a P-GW (PDN Gateway) The number of each component shown in FIG. 1 is illustrative, and the number of each component of the mobile communication network in which the present invention can be implemented is not limited to the number shown in the drawings.

For example, the macro base stations 10, 20 and 30 can be used in an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, But is not limited to, the characteristics of the macro cell base station that manages the base station.

The micro base stations 11 to 15 and 21 to 23 and 31 to 33 may be used in an LTE network, a WiFi network, a WiBro network, a WiMax network, a WCDMA network, a CDMA network, a UMTS network, but is not limited to, the features of a pico base station, an indoor base station or a femto base station, or a relay that manages a cell having a radius of about m to several tens of meters.

The micro base stations 11 to 15, 21 to 23, and 31 to 33 and the macro base stations 10, 20, and 30 can independently have connectivity of the core network.

The UE 40 is used in a portable Internet network such as a GSM network, a 2G wireless communication network such as a CDMA network, a wireless Internet network such as an LTE network and a WiFi network, a WiBro network and a WiMax network or a mobile communication network supporting packet transmission But is not limited to, the characteristics of the mobile terminal.

The management server (O & M server) 70, which is a network management apparatus of the micro-base station, is responsible for configuration information and management of the micro base stations 11 to 15, 21 to 23, and 31 to 33 and the macro base stations 10, . The management server 70 can perform both the functions of the SON server 50 and the MME 60. [ SON server 50 may include any server that performs macro / micro base station installation and optimization and functions to provide basic parameters or data necessary for each base station. The MME 60 may include any entity used to manage the mobility of the terminal 40 and the like. Also, the MME 60 performs a function of a base station controller (BSC) and performs resource allocation, call control, handover control, voice and packet processing, and the like on the base stations (pico eNodeB, Home eNodeB, macro eNodeB, Can be performed.

In one embodiment, one management server 70 can perform both SON server 50 and MME 60 functions, and SON server 50 and MME 60 can perform functions of both SON server 50 and MME 60, 20, and 30) and one or more micro base stations 11 to 15, 21 to 23, and 31 to 33.

Although it is assumed that a macro cell, a pico cell, and a femtocell are mixed in the mobile communication network, the network cell may be composed of a macro cell, a pico cell, and a macro cell.

Access to the macro base stations 10, 20 and 30 is generally permitted for all terminals, but access to the micro base stations 11 to 15 and 21 to 23 and 31 to 33 is restricted to a specific terminal (subscriber) There is an operational function that can be done. This is called a connection mode or an operation mode, and the connection mode of the micro base stations 11 to 15, 21 to 23, and 31 to 33 is classified according to which terminal is provided with a service. That is, a closed connection mode, an open connection mode, and a hybrid connection mode. The closed access mode (Closed Access mode or CSG Closed mode) allows access only to a specific subscriber. An open access mode (CSG Open mode) is a mode in which any subscriber can connect without a connection permission condition, Hybrid) can be regarded as a compromise type.

Specifically, the micro-base stations 11 to 15, 21 to 23, and 31 to 33 can broadcast SIB 1 (System Information Block type 1), which is system information, to the femtocell area managed by itself. And a CSG indicator (Closed Subscriber Group indicator) indicating whether access to the femtocell is restricted. SIB 1 is a message that a base station (HeNB, macro eNB) broadcasts information about its own cell to all the terminals 40. The SIB 1 includes a CGI (Cell Global Identity) (a unique cell identifier in the network), a CSG indication , A CSG ID (ID for CSG), and the like.

When the mobile communication network is assumed to be an LTE network, the LTE network is interworked with an inter-RAT network (WiFi network, WiBro network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.). (LTE network, WiFi network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.) when one of the inter-RAT networks (e.g., WiBro network) is the mobile communication network. (WiFi network, WiMax network, WCDMA network, CDMA network, UMTS network, GSM network, etc.) are shown apart from each other in the drawing, (Overlay).

(ENodeB, 25 in FIG. 2), when the micro base stations 11 to 15, 21 to 23, 31 to 33 and / or the macro base stations 10, 20 and 30 are collectively referred to as a ' The E-UTRAN comprises an IP-based flat structure and processes data traffic between the terminal 40 and the core network. The signal control between them is performed by the MME 60. The MME 60 takes charge of signal control between the base station apparatus 25 and the S-GW (Serving Gateway) 80, and determines where to route the incoming data from the terminal 40. The S-GW 80 plays an anchor function between the base station device 25 and the base station device 25 for movement of a mobile station between the 3GPP network and the E-UTRAN, and performs an anchoring function for a P-GW (Packet Data Network (PDN) Gateway) 90 to the IP network. The MME 60 / S-GW 80, which is a core network equipment, manages a plurality of base station devices 25, and each base station device 25 is composed of a plurality of cells. The C-plane / U-plane is controlled through the S1 interface between the base station device 25 and the MME 60 / S-GW 80, and the X2 interface is used for handover between the base station device 25 and the SON function. do.

The setup of the network interface is accomplished by setting up the S1 interface connecting with the MME 60 at the center of the system and the X2 interface, which is a network line for direct communication with the base station device 25 of other cells present on the current system. The S1 interface exchanges operation and management (OAM) information to support the movement of the UE 40 by exchanging signals with the MME 60. [ Also, the X2 interface exchanges signals for the fast handover, load indicator information, and information for self-optimization among the base station apparatuses 25.

The flow of download data traffic in the EPC network is as follows.

2 is a diagram showing an embodiment of an EPC network to which the present invention can be applied.

The E-UTRAN is an LTE radio access network composed of a base station apparatus (eNodeB) 25, a radio network controller (RNC), and a base station controller (BSC) ) To transfer data and control information. In addition, a paging request for CS fallback, a function for delivering an SMS message to the UE 40, and a direct connection to a target cell capable of a CS service are supported.

2, "LTE-Uu" represents an air interface between the E-UTRAN and the UE 40, "S1" is an interface between the E-UTRAN (the base station device 25) "S5 / S8" is an interface between the S-GW 80 and the P-GW 90. And "SGi" is an interface between the P-GW 90 and the IP network.

The UE 40 and the base station apparatus (eNodeB) 25 of the E-UTRAN communicate via the Radio Resource Control (RRC) protocol and a broadcasting message to the cell area controlled by the eNodeB 25 by itself RRC message. The RRC message may include control messages from the Non-Access Stratum (NAS) protocol, which control messages are transmitted transparently to the UE 10 or the core network without being read in the E-UTRAN.

The data traffic downloaded from the EPC network is transmitted through the mapping between the SGi interface, the S5 / S8 interface, the S1 interface, and the LTE-uu interface section.

Specifically, the download data traffic transmitted from the IP network to the EPC network is transmitted through the SGi interface section. At this time, if the user data of the received packet is not checked for duplication, the P-GW 90 transmits the 5-TUPLE (source IP, destination IP, protocol ID, source port, destination port) S8 TEID (Tunnel Endpoint Identifier) and the S-GW (80) by comparing it with the Downlink Traffic Flow Template (DL TFT) of its own. Then, the P-GW 90 transmits the packet to the S-GW 80 using the mapped S5 / S8 TEID. The S-GW 80 receiving the packet determines the S1 TEID and the eNodeB 25 using the S5 / S8 TEID value of the received packet and transmits the packet to the eNodeB 25 through the S1 interface. The eNodeB 25 finds the DRB (Data Radio Bearer) ID of the LTE-uu interface section and the UE 40 using the S1 TEID of the packet received from the S-GW 80 and transmits the data to the corresponding UE 40 do.

FIG. 3 is a diagram showing another embodiment of an EPC network to which the present invention can be applied. FIG. 3 shows an example in which the S-GW 80 and the P-GW 90 are implemented as a single gateway. When the S-GW 80 and the P-GW 90 are implemented as a single gateway, the S5 / S8 interface between the S-GW 80 and the P-GW 90 is omitted.

4 is a diagram showing a case where duplicate packets of the same user data occur.

As shown in FIG. 4, when the application server 100 transmits the same data to a plurality of UEs # 1-6 (40-1 to 40-6) connected to two EPC networks, If the redundancy of the user data is not examined, the transmission and reception of the same packet of the user data may occur at the same network node.

In the drawing, a downward arrow indicates a flow of packets in which user data is the same. In this case, the application server 100 must transmit the same data to the EPC network through the IP network six times. The EPC network that receives the data repeats the mapping process and the transmission process of the SGi interface, the S5 / S8 interface, the S1 interface, and the LTE-uu interface period, and finally transmits the data to the UE 40. [ That is, data is transmitted to the UEs # 1 to # 2 (40-1 to 40-2) through the P-GW 90-1, the S-GW 80-1 and the eNodeB 25-1 of the first EPC network And transmits data to the UE # 3 40-3 through the P-GW 90-1, the S-GW 80-1, and the eNodeB 25-2 of the first EPC network. Further, data is transmitted to the UEs # 4-6 (40-4 ~ 40-6) via the P-GW 90-2, the S-GW 80-2 and the eNodeB 25-3 of the second EPC network Respectively. Thus, six repetitive transmission processes occur for the same data in the EPC network.

Since the same node transmits and receives the same data from the application server 100 to the IP network, the P-GW 90, the S-GW 80, and the eNodeB 25, unnecessary load can be given to the network. The network load becomes worse when there are more UEs 40 to receive the same data, and also when a larger number of UEs 40 are connected to a small number of eNodeBs 25.

The present invention reduces the load on the EPC network and the IP network when the application server 100 transmits the same data to a group to which a plurality of UEs 40 connected to the EPC network belong.

As a first embodiment, the application server 100 connected to the IP network can transmit the same data only once to the P-GW 90 of a specific EPC network without repeatedly transmitting, thereby reducing the load on the IP network. As a second embodiment, the load of the EPC network can be reduced by transmitting the same data from the P-GW 90 to the eNodeB 25 of the EPC network only once without transmitting the same data many times. At this time, when there are more UEs 40 to receive the same data, and when a larger number of UEs 40 are connected to a small number of P-GW 90, S-GW 80, and eNodeB 25 The problem of network load is further improved.

Hereinafter, referring to FIG. 5 in common, a method for avoiding repetitive transmissions when the same data is transmitted to the group of UEs 40 from the application server 100 to the P-GW 90 several times according to the first embodiment (See FIGS. 7 to 9) to avoid repetitive transmissions when transmitting the same data to the group of UEs 25 from the P-GW 90 to the eNodeB 25 according to the second embodiment .

5 is a diagram illustrating a configuration of an EPC network for reducing a network load in the same data transmission according to the present invention.

The APP gateway 130, the APP gateway server 120, and the EPC gateway 110 are required to prevent redundant transmission of the same data from the application server 100 to the P-GW 90 according to the embodiment of the present invention. Do.

The APP gateway 130 is interlocked with the application server 100.

The APP gateway server 120 stores and manages connection information on which P-GW 90 the specific UE 40 is connected to.

The EPC gateway 110 is interworked with the P-GW 90 and communicates with the APP gateway 130 and the APP gateway server 120.

3, the S-GW 80 and the P-GW 90 are separated from each other and communicate with each other via the S5 / S8 interface. However, the S-GW 80 and the P- It is obvious that the present invention can be implemented as a single gateway.

The APP gateway 130 receives control data required for group management and user data to be transmitted to each terminal 40 from the application server 100 according to the network load reduction method in the same data transmission according to the first embodiment, It is checked whether the user data is duplicated, and the terminals 40 are grouped on the basis of the IP information of the terminals 40 to which the duplicated user data is to be transmitted, and then transmitted to the terminals 40 belonging to the group Common user data to be transmitted to the EPC network.

Here, the grouping can identify the P-GW 90 to which the corresponding terminal 40 belongs based on the IP information of the terminals 40 to which the duplicated user data is to be transmitted, and can group the P-GWs 90 by the P-GW 90.

The EPC network includes a P-GW 90 for each group and an EPC gateway 110 linked to the P-GW 90. The APP gateway 130 coupled to the application server 100 is connected to an application server GW 90 to which each terminal 40 belongs using the terminal IP information received from the terminal 100 and requests the APP gateway server 120 having the terminal IP and the P-GW IP matching table, The P-GW 90 receives the result and confirms the P-GW 90 to which each terminal 40 belongs or requests the E-PPC gateway 110 connected to the P-GW 90 so that the P- GW 90 to which each terminal 40 belongs can be confirmed by receiving a result of determining whether there is a TEID matching with the terminal IP information.

Hereinafter, a method for reducing the network load at the same data transmission according to the first embodiment will be described in detail.

The application server 100 transmits control data necessary for managing a specific group of UEs 40 and common user data to be transmitted to all the UEs 40 belonging to the group to the APP gateway 130. [ Lt; / RTI >

In one embodiment, 5-TUPLE information (source IP, destination IP, protocol ID, source port, destination port) of all UEs 40 belonging to the group may be included in the control data. Optionally, the control data may include information to be received when each UE 40 receives data from the application server 100. As an example of the additional information, it may be a sequence number of a packet.

Here, the user data may be data received commonly by the UE 40, and may be multimedia data such as a text message, voice, picture, and moving picture.

There is a mechanism between the application server 100 and the APP gateway 130 to manage groups of UEs 40 so that control data and user data can be efficiently exchanged. This mechanism recognizes and manages the UE group with the ID of the application server 100 and the group ID assigned by the application server 100.

The APP gateway 130 performs a task of confirming from which P-GW 90 the UE 40 has come from using the UE IP information received from the application server 100. [ If the APP gateway 130 can not find the P-GW 90 that matches the corresponding UE 40 in the APP gateway 130, the APP gateway 130 requests the APP gateway server 120 to transmit the P -GW (90). The APP gateway server 120 has a table in which the UE IP and the P-GW IP are matched. If the P-GW IP information matching the UE IP is not found in the table, the APP gateway server 120 requests the EPC gateway 110. Upon receiving the request, the EPC gateway 110 determines whether there is a TEID (Tunnel Endpoint Identifier) matching the UE IP information in the DL TFT of the P-GW 90, and transmits the resultant value to the APP gateway server 120. Here, the request message may include the IP information of the UE 40 based on the 5-Tuple information of the control data.

The APP gateway server 120 having received the resultant value transmits a response message including the IP information of the P-GW 90 to which the UE 40 belongs to the APP gateway 130.

The APP gateway 130 creates one group for each P-GW 90 based on the P-GW 90 for UE groups receiving the same user data, and stores the control data in each group separately . Then, the control data and user data are transmitted to the EPC gateway 110, which is a module for interworking with the P-GW 90, for each group. At this time, there is a mechanism between the APP gateway 130 and the EPC gateway 110 to manage UE groups so as to efficiently exchange control data and user data. This mechanism recognizes and manages the group by the APP gateway ID or the group ID assigned by the APP gateway 130.

The EPC gateway 110 receiving the data from the APP gateway 130 basically manages the APP gateway ID, the group ID, the control data, and the user data in the downlink data table.

Referring to FIG. 6, a method of reducing a network load when transmitting the same data according to the first embodiment will be described as follows.

The application server 100 transmits the same data to all six UEs 40 connected to two EPC networks. That is, control data and user data of six UEs 40 are transmitted to the APP gateway 130. Then, the APP gateway 130 confirms whether the user data is redundant and sends a request message including the IP information of the six UEs 40 to the APP gateway server 120, GW connection value that is linked to the P-GW connection value. Based on the result of the response, the APP gateway 130 recognizes that six UEs 40 are connected to the P-GW # 1 (90-1) and the P-GW # 2 (90-2) The control data and the user data of the UEs # 1 to 3 and the control data and the user data of the UEs # 4 to 6 are transmitted to the EPC gateway # 1 110-1 and the EPC gateway # 2 90-2. By transmitting the same data only once per P-GW group to which the terminals belong, the load of the IP network can be reduced.

The method of reducing the network load at the time of transmitting the same data according to the second embodiment will be described in detail as follows.

In order to avoid repeated transmission of user data from the EPC gateway 110 to the base station apparatus (eNodeB) 25, the following three methods can be considered. The process of receiving data from the APP gateway 130 by the EPC gateway 130 may be performed by receiving the overlapped user data only once for each P-GW group using the first embodiment, It is possible to receive the same number of user data as the number of UEs.

First, according to the embodiment 2-1, the EPC gateway 110 allocates each eNodeB 25 (eNodeB) 25 based on all the base station apparatuses (eNodeBs) 25 connected to the UEs 40 belonging to the specific UE group ), Divides the control data into a plurality of groups, and stores the control data in each group. Then, one representative UE 40 is selected for each group. To this end, the eNodeB ID is added to the downlink data table of the EPC gateway 110 and the DL TFT of the P-GW 90. At this time, the group that is the unit of transmission in the EPC gateway 110 is divided into an APP gateway ID, a group ID, and an eNodeB ID. All the UE information belonging to the eNodeB group is matched to the DL TFT in the packet of the selected UE 40 and is mapped to the S5 / S8 TEID, and is stored and transmitted to the S-GW 80 together with the control data and the user data. At this time, the TEID information of the UE 40 belonging to the group is set in a GTP extension header or control data, and the P-GW 90, the S-GW 80, and the eNodeB 25 recognize this, Information is available. Therefore, the UE group having the same eNodeB ID selects the S5 / S8 TEID of the representative UE 25 and transmits the user data. For example, if there are 10 UEs 25 in the same eNodeB group and the same data needs to be sent to this group, the S5 / S8 TEID mapped to one DL TFT is selected and the user data using this representative S5 / S8 TEID The remaining 9 user data need not be transmitted in duplicate.

The S-GW 80 then performs the following two procedures depending on whether the function of the present invention is implemented in the destination eNodeB 25 or not.

As a 2-1-1 embodiment, when the function of the present invention is implemented in the eNodeB 25, the S-GW 80 maps the S5 / S8 TEID group stored in the packet of the representative UE 40 to the S1 TEID And then transmits the control data and the user data to the eNodeB 25 by using the S1 TEID of the representative UE 40. The eNodeB 25 that has transmitted the packet converts the S1 TEID in the packet of the representative UE 40 into the data radio bear ID and generates a packet for each UE 40 using the control data and the user data, And transmits the packet to the UE 40 in the radio section.

If the function of the present invention is not implemented in the eNodeB 25, the S-GW 80 sets the S5 / S8 TEID stored in the packet of the representative UE 40 to the S1 TEID Maps control data of UE 40 corresponding to each S1 TEID, combines user data to generate a packet, and transmits the packet to all eNodeBs 25 using S1 TEID.

Referring to FIG. 7, a method of reducing a network load when transmitting the same data according to the second embodiment of the present invention will be described below.

The EPC gateway # 1 110-1 that has received the data from the APP gateway 130 determines that the UE # 1 40-1 and the UE # 2 40-2 are in the eNodeB # 1 25-1 and the UE # 3 40-3 is connected to the eNodeB # 2 40-3 through the downlink data table to which the eNodeB ID is added, and the eNodeB # 1 25-1, eNodeB # 2 25-2 ), Respectively. At this time, the S5 / S8 TEIDs, the control data and the user data of the UE # 1 40-1 and the UE # 2 40-2 are stored in the eNodeB # 1 (25-1) 2) group stores S5 / S8 TEID, control data and user data of UE # 3 (40-3).

Similarly, the EPC gateway # 2 110-2 transmits the eNodeB # 3 (25-3), which is the same eNodeB, to the UE # 4 40-4, the UE # 5 40-5, ) Through the downlink data table to which the eNodeB ID is added, and forms a group based on the eNodeB # 3 (25-3). At this time, the S5 / S8 TEID of UE # 4-6 (40-4 ~ 40-6), control data and user data are stored in the eNodeB # 3 (25-3) group.

Thereafter, the EPC gateway # 1 110-1 and the EPC gateway # 2 110-2 select one representative UE 25 for each eNodeB group (eNodeB # 1 ~ 3). And transmits all the UE information belonging to each eNodeB group (eNodeB # 1 to 3) to the S-GW 80 using the S5 / S8 TEID of the selected three representative UEs 40. [ Since the S-GW 80 has a specific setting for the packet received from the P-GW 90, the packet data is opened to convert the TEID. Then, the S-GW 80 confirms that the functions of the present invention are applied to all the eNodeBs 25, and then transmits them to the eNodeB 25. [ The eNodeB 25 confirms that the TEID information is set in the packet, converts the S1 TEID to the DRB ID by opening the packet, generates a packet for each UE 40 using the control data and the user data, Lt; / RTI >

According to the embodiment 2-2, the EPC gateway 110 allocates each S-GW 80 (refer to FIG. 8) based on all the S-GWs 80 to which the UE 40 belonging to the specific UE group is connected ), Separates the control data, and stores the control data in each group. Then, the UE 40 is selected one by one for each group. To this end, the S-GW ID is added to the downlink data table of the EPC gateway 110 and the DL TFT of the P-GW 90. The group that is the unit of transmission in the EPC gateway 90 is divided into an APP gateway ID, a group ID, and an S-GW ID. Information of all the UEs 40 belonging to the selected group to the selected representative UE 40 is mapped to the DL TFT and mapped to the S5 / S8 TEID and stored in the packet of the representative UE 40. [ Then, the packet is transmitted to the S-GW 80 together with the user data. The TEID information of the UE 40 belonging to the group is set in the GTP extension header or the control data and the P-GW 90, the S-GW 80, and the eNodeB 25, You can recognize and make this information available.

The S-GW 80 then performs the following two procedures depending on whether the function of the present invention is implemented in the destination eNodeB 25 or not.

As a 2-2-1 embodiment, when the function of the present invention is implemented in the eNodeB 25, the S-GW 80 transmits a plurality of S5 / S8 TEIDs stored in the packet received from the P- The control unit 40 divides the control data into subgroups according to the eNodeB 25 to which the control unit 40 is connected, and stores control data divided into the respective subgroups. Then, the representative UE 40 is selected for each small group. All S5 / S8 TEIDs belonging to the corresponding eNodeB group are mapped to S1 TEID in the selected representative UE 40 and stored in the packet of the representative UE 40. [ Then, the packet is transmitted to the eNodeB 25 to which the terminal 40 belongs together with the control data and the user data. The eNodeB 25 receiving the packet converts the S1 TEID in the packet of the representative UE 40 into a DRB (Data Radio Bearing) ID and generates a packet using the control data and the user data. Then, the UE 40 transmits the packet to the radio section using the DRB ID.

If the function of the present invention is not implemented in the eNodeB 25, the S-GW 80 sets the S5 / S8 TEID stored in the packet of the representative UE 40 to the S1 TEID Maps control data of UE 40 corresponding to each S1 TEID, combines user data to generate a packet, and transmits the packet to all eNodeBs 25 using S1 TEID.

Referring to FIG. 8, a method of reducing a network load at the time of transmitting the same data according to the embodiment 2-2-1 will be described.

The EPC gateway # 1 110-1 that has received the data from the APP gateway 130 has the S-GW # 1 40-1, the UE # 2 40-2, # 1 (80-1) through the downlink data table to which the S-GW ID is added, and forms a group based on the S-GW # 1 (80-1). At this time, the S5 / S8 TEID of the UE # 1 40-1, the UE # 2 40-2, and the UE # 3 40-3, the control data, and the user data Is stored.

Similarly, the EPC gateway # 2 (110-2) has the UE # 4 40-4, the UE # 5 40-5, and the UE # 6 40-6 all connected to the S- Through the downlink data table to which the S-GW ID is added, and forms a group based on the S-GW # 2 (80-2). At this time, the S5 / S8 TEID of the UE # 4 (40-4), the UE # 5 (40-5), and the UE # 6 (40-6) Is stored.

Thereafter, the EPC gateway # 1 110-1 and the EPC gateway # 2 110-2 select one representative UE 40 for each of the S-GW groups (S-GW # 1 to 2). And transmits all the UE information belonging to each eNodeB group (eNodeB # 1 to 3) to the S-GW 80 using the S5 / S8 TEID of the two representative UEs 40 selected.

Since the S-GW 80 has a specific setting for the packet received from the P-GW 90, the packet data is opened and the UE 40 is grouped again for each eNodeB and the TEID is converted. The S-GW # 1 80-1 has the UE # 1 40-1 and the UE # 2 40-2 connected to the eNodeB # 1 25-1 and the UE # 3 40-3 Recognizes that they are connected to eNodeB # 2 (25-2), and groups them based on eNodeB # 1 (25-1) and eNodeB # 2 (25-2). At this time, S1 TEID, control data and user data of UE # 1 40-1 and UE # 2 40-2 are stored in eNodeB # 1 group, UE # 3 40-3), the control data and the user data are stored. Likewise, the S-GW # 2 80-2 transmits the eNodeB # 2 25-2 to the UE # 4 40-4, the UE # 5 40-5, And forms a group based on eNodeB # 3 (25-3). At this time, the S1 TEID of the UE # 4 40-4, the UE # 5 40-5, and the UE # 6 40-6, control data, and user data are stored in the eNodeB # 3 group.

After confirming that the functions of the present invention are applied to all the eNodeBs 25, the S-GW1 # 1 80-1 and the SG2 # 2 80-2 select one representative UE 40 for each eNodeB group . And transmits all the UE information belonging to each eNodeB group to the eNodeB 25 using the S1 TEID of the selected three representative UEs 40. [ The eNodeB 25 confirms that the TEID information is set in the packet, converts the S1 TEID to the DRB ID by opening the packet, generates a packet for each UE 40 using the control data and the user data, Lt; / RTI >

On the other hand, the second to third embodiments assume that the S-GW 80 and the P-GW 90 are implemented as one system (SP-GW). In this case, the SP-GW performs the following two procedures depending on whether the function of the present invention is implemented in the destination eNodeB 25 or not.

As the embodiment 2-3-1, when the content of the present invention is implemented in the destination eNodeB 25, the EPC gateway 110 transmits, to the eNodeB 25, all Each group is created for each eNodeB 25, and control data is separately stored in the generated group. Then, representative UEs 40 are selected one by one for each group. At this time, the information of all the UEs belonging to the selected UE 40 is matched to the DL TFT, and the information is mapped to the S1 TEID and stored in the packet. Then, the packet is transmitted to the eNodeB 25 together with the control data and the user data. At this time, the TEID information of the UE 40 is set in the GTP extension header or the control data, and the SP-GW and the eNodeB 25 can recognize this information and use this information. The eNodeB 25 that has transmitted the packet converts the S1 TEID in the packet into a data radio bear ID, generates a packet to be sent to the UE 40 using the control data and the user data, and transmits the packet to the UE 40 And transmits the packet to the wireless section.

If the function of the present invention is not implemented in the destination eNodeB 25, the EPC gateway 110 matches the information of the UE stored in the control data with the DL TFT and maps it to the S1 TEID . Then, it finds the control data of the corresponding UE 40, combines user data to generate a packet, and transmits the packet to all the eNodeBs 25 using the S1 TEID.

Referring to FIG. 9, a method of reducing a network load when transmitting the same data according to the embodiment 2-3-1 will be described as follows.

The EPC gateway # 1 110-1 that has received the data from the APP gateway 130 determines that the UE # 1 40-1 and the UE # 2 40-2 are in the eNodeB # 1 25-1 and the UE # 3 (40-3) are connected to the eNodeB # 2 (25-2) through the downlink data table to which the eNodeB ID is added, and the eNodeB # 1 (25-1), eNodeB # 2 ), Respectively. At this time, the S1 TEID, control data and user data of the UE # 1 40-1 and the UE # 2 40-2 are stored in the eNodeB # 1 (25-1) The S1 TEID of UE # 3 40-3, control data, and user data are stored.

Similarly, the EPC gateway # 2 110-2 transmits the eNodeB # 3 25-3, which is the same eNodeB, to the UE # 4 40-4, the UE # 5 40-5, Through the downlink data table to which the eNodeB ID is added, and forms a group based on eNodeB # 3 (25-3). At this time, S1 TEID, control data and user data of UE # 4 (40-4), UE # 5 (40-5), and UE # 6 (40-6) are stored in the eNodeB # 3 .

After that, the EPC gateway # 1 110-1 and the EPC gateway # 2 110-2 confirm that the functions of the present invention are applied to all the eNodeBs 25, and then select one representative UE 40 for each eNodeB group . Then, all the UE information belonging to each eNodeB group is transmitted to the eNodeB 25 by using the S1 TEID of the selected three representative UEs 40. The eNodeB 25 confirms that the TEID information is set in the packet, converts the S1 TEID to the DRB ID by opening the packet, generates a packet for each UE 40 using the control data and the user data, Lt; / RTI >

Although the method has been described through particular embodiments, the method may also be implemented as computer readable code on a computer readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored. Examples of the computer-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 may be implemented in the form of a carrier wave (for example, transmission over the Internet) . In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner. In addition, functional programs, codes, and code segments for implementing the above embodiments can be easily deduced by programmers of the present invention.

Although the present invention has been described in connection with some embodiments thereof, it should be understood that various changes and modifications may be made therein without departing from the spirit and scope of the invention as understood by those skilled in the art. something to do. It is also contemplated that such variations and modifications are within the scope of the claims appended hereto.

25: base station apparatus (eNodeB) 40: terminal UE
80: S-GW (Serving Gateway) 90: P-GW (PDN Gateway)
100: Application server 110: EPC gateway
120: APP gateway server 130: APP gateway

Claims (22)

As a network load reduction method in the same data transmission,
a) receiving from the application server the control data necessary for group management and the user data to be transmitted to each terminal from the application server, and verifying whether the user data is duplicated or not;
b) grouping the terminals based on the IP information of the terminals to which the APP gateway transmits the duplicated user data; And
c) transmitting, by the APP gateway, common user data to be transmitted to the UEs belonging to the corresponding group in the first group to the EPC network together with the first group information and the information of the UEs belonging to the first group A method for reducing network load during data transmission. The method according to claim 1,
Wherein the EPC network comprises a P-GW (PDN Gateway) and an EPC gateway interworking with the P-GW on a group-by-group basis. 3. The method of claim 2,
Wherein the first group information is information obtained by grouping the P-GWs belonging to the corresponding terminal based on IP information of terminals to which duplicated user data is to be transmitted, and grouping the P-GWs according to the P-GWs. The method of claim 3,
Wherein, in step b), the APP gateway interworking with the application server,
The P-GW to which each terminal belongs is checked using the terminal IP information received from the application server,
Requests the APP gateway server having the terminal IP and the P-GW IP matching table, receives the result value, confirms the P-GW to which each terminal belongs,
The P-GW requests the EPC gateway interworked with the P-GW to receive the result of determining that the P-GW has a tunnel endpoint identifier (TEID) matching the terminal IP information in the DL TFT (Downlink Traffic Flow Template) And the first grouping of the terminals by confirming the P-GW. 3. The method of claim 2,
The EPC gateway performs a second grouping of the UEs based on the base station device to which the UE is connected and a second group information of common user data to be transmitted to the UEs belonging to the corresponding group in the second group, And transmitting the same to the base station apparatus together with the information of the base station apparatus. 3. The method of claim 2,
The EPC gateway groups the UEs in the third group based on the S-GW (Serving Gateway) to which the UE is connected, and transmits common user data to be transmitted to the UEs belonging to the corresponding group to the third group, 3 to the S-GW via the P-GW (PDN Gateway) together with the information of the terminals belonging to the third group; And
GWs of the third group group the UEs on the basis of the base station to which the UE is connected and group user data to be transmitted to the UEs belonging to the group by the fourth group on the basis of the fourth group information, And transmitting the same to the base station apparatus together with the information of the terminals belonging to the fourth group. The method according to claim 6,
Wherein the P-GW and the S-GW are implemented as one system (SP-GW). 8. The method according to any one of claims 5 to 7,
Further comprising the step of the base station apparatus transmitting common user data to each connected terminal based on the information of the terminal. 8. The method according to any one of claims 1 to 7,
Wherein the control data includes 5-TUPLE (source IP, destination IP, protocol ID, source port, destination port) information of all terminals belonging to the group. 10. The method of claim 9,
Wherein the control data further includes a packet sequence number required when terminals belonging to the group receive user data from the application server. A mobile communication system,
An APP gateway server for storing and managing access information about a device to which the terminal belongs; And
Receiving from the application server control data necessary for group management and user data to be transmitted to each terminal to confirm whether or not the user data is duplicated and based on the IP information of terminals to be transmitted with the duplicated user data in cooperation with the APP gateway server And an APP gateway for grouping the first terminals and transmitting common user data to be transmitted to the terminals belonging to the first group to the first group and transmitting the first group information to the terminals belonging to the first group together with the information to the EPC network The mobile communication system comprising: 12. The method of claim 11,
Wherein the EPC network comprises a P-GW (PDN Gateway) and an EPC gateway interworking with the P-GW on a group-by-group basis. 13. The method of claim 12,
Wherein the first group information is information obtained by grouping the P-GWs (PDN Gateways) to which the UE belongs based on the IP information of the UEs to which the redundant user data is to be transmitted. 14. The method of claim 13,
The APP gateway server receives, stores, and manages connection information related to the P-GW interworking with the terminal from the EPC gateway interworked with the P-GW, and provides the corresponding information when the APP gateway requests it. 15. The method of claim 14,
The APP gateway,
The P-GW to which each terminal belongs is checked using the terminal IP information received from the application server,
Requests the APP gateway server having the terminal IP and the P-GW IP matching table to receive the result value, confirms the P-GW to which each terminal belongs,
The P-GW requests the EPC gateway interworked with the P-GW to receive the result of determining that the P-GW has a TEID (Tunnel Endpoint Identifier) matching with the terminal IP information in the DL TFT (Downlink Traffic Flow Template) And grouping the terminals by checking the P-GW to which the P-GW belongs. 13. The method of claim 12,
The EPC gateway groups the UEs based on the base station to which the UE is connected, and transmits common user data to be transmitted to the UEs belonging to the corresponding group to the second group to the second group information, To the base station apparatus together with the information of the terminal. 13. The method of claim 12,
The EPC gateway performs third grouping of UEs on the basis of an S-GW (Serving Gateway) to which the UE is connected, common user data to be transmitted to UEs belonging to the corresponding group in the third group, GW (PDN Gateway) together with the information of the terminals belonging to the third group to the S-GW,
Each of the S-GWs in the third group groups the UEs in the fourth group based on the base station to which the UE is connected and transmits common user data to be transmitted to the UEs belonging to the group in the fourth group, To the base station apparatus together with the information of the terminals belonging to the fourth group. 18. The method of claim 17,
Wherein the P-GW and the S-GW are implemented as one system (SP-GW). 19. The method according to any one of claims 16 to 18,
Wherein the base station apparatus further comprises transmitting common user data to each of the connected terminals based on information of the terminals. 19. The method according to any one of claims 11 to 18,
The control data includes 5-TUPLE (source IP, destination IP, protocol ID, source port, destination port) information of all terminals belonging to the group. When the terminals belonging to the group receive user data from the application server And further comprising a necessary packet sequence number. As a network load reduction method in the same data transmission,
a) transmitting from the application server the control data required for group management and user data to be transmitted to each terminal from the application server to the EPC network; And
b) grouping the UEs based on the base station apparatus to which the UE is connected, and transmitting the common user data to be transmitted to the UEs belonging to the corresponding group to the second group to the EPC gateway of the EPC network, And transmitting the same to the base station apparatus together with the information of the terminals belonging to the group. A mobile communication system,
And a table for storing and managing connection information on a base station apparatus to which the terminal belongs. The base station apparatus includes a table for grouping terminals based on a base station to which the terminal is connected, And an EPC gateway for transmitting the user data of the first group to the base station apparatus together with the second group information and the information of the terminals belonging to the second group.

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