KR20160061089A - Backhaul system and apparatus and control method applied to the same - Google Patents

Abstract

The present invention provides a backhaul system, a terminal applied to the same and an operating method thereof. The backhaul system can operate each of core networks for a user terminal and a specific-purposed terminal separately, because the specific-purposed terminal such as a backhaul terminal operating as a router in a wireless backhaul uses a network device (specific MME) different from network devices (commercial MME) where terminals of normal users use. The system comprises: an information possessing unit which possesses device information on a specific network device included in a specific core network which is different from commercial networks; a request providing unit which provides a connection request for a core network for a base station device; and a connection control unit which provides the device information when providing the connection request, such that the base station device processes a connection procedure of the terminal for the specific core network via the specific network device among multiple network devices.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backhaul system,

[0001] The present invention relates to a technology for separately operating a core network, and more particularly, to a technology for separately using a network device (a specific MME) different from a network device (commercial MME) used by a general user terminal The present invention relates to a backhaul system capable of separating and operating a core network for a terminal of a general user and a terminal for a specific use, and an operation method of the terminal apparatus and the terminal apparatus applied thereto.

However, backhaul, which is a connection between a base station and a core network, is not necessarily set to use wired or wireless in the standard, and this is an implementation issue that can be selected by a provider implementing a mobile communication network .

However, in most cases, the backhaul of the base station is implemented in a wired manner in which stable communication packet transmission is possible, and is implemented in a wireless manner based on mmWave only in some areas.

The existing mmWave-based wireless backhaul implemented in the wireless manner uses a relatively high frequency relative to a mobile communication network such as LTE (Long Term Evolution). However, since the directivity of the radio wave is very large due to the use of high frequencies, (LOS) environment in which there is no obstacle between the base station (eg base station) and the receiver (eg, core network equipment), and the path loss due to the distance is high. And the severe degradation due to rainfall damping in the case of rainfall,

Accordingly, in some areas where it is difficult to implement a backhaul in a wired manner, for example, in the Ozina or book area, a wireless backhaul based on mmWave is implemented despite the disadvantages as described above.

Accordingly, the present invention proposes a backhaul agent and a backhaul terminal that implement a backhaul between a base station and a core network in a wireless manner, thereby realizing a wireless backhaul in which all the disadvantages of the existing mmWave-based wireless backhaul are improved. (A specific MME) different from the network device (commercial MME) used by the terminal of the general user can be used for the backhaul terminal serving as the router in the method backhaul, We propose a method to separate and operate the core network.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a backhaul terminal serving as a router in a specific use terminal such as a wireless backhaul, (Specific MME) different from that of the core network by using the core network for the general user terminal and the terminal for the specific use, respectively.

According to a first aspect of the present invention, there is provided a terminal apparatus comprising: an information holding unit for holding device information of a specific network device belonging to a specific core network that is different from a core network; A request providing unit for providing a connection request for the core network to the base station apparatus; And providing the pre-stored device information to the base station device when providing the connection request, wherein the base station device processes the connection procedure of the terminal device to the specific core network through the specific network device among the plurality of network devices And a connection control section for enabling the connection control section to enable the connection control section.

Preferably, the plurality of network devices may be classified into a specific network device belonging to a backhaul agent that realizes a backhaul between a device and the commercial core network in a wireless manner, and a commercial network device belonging to the commercial core network have.

Preferably, the base station apparatus can process a connection procedure to the commercial core network through the commercial network apparatus for a terminal apparatus that does not provide the apparatus information when providing a connection request to the core network.

Preferably, the device information of the specific network device may be retained only when the terminal device is a backhaul terminal implementing a backhaul between the device and the commercial core network in a wireless manner.

According to a second aspect of the present invention, there is provided a backhaul system for receiving a first communication packet from at least one device for generating a first communication packet by inserting first path information into a communication packet, A backhaul terminal for inserting identification path information for identifying a device that generated the first communication packet into the first communication packet and transmitting the same to the base station apparatus; And receiving second communication packet from the base station apparatus that generates a second communication packet by inserting second path information into the first communication packet received from the backhaul terminal, And a backhaul agent for providing the first communication packet to the commercial core network and deleting only the first path information in the first communication packet in the commercial core network; The backhaul terminal is connected to a specific core network to which the specific network device belongs through a specific network device in the backhaul agent.

Preferably, the backhaul terminal provides the base station apparatus with device information of the specific network apparatus that is held when the backhaul terminal provides a connection request for the core network to the base station apparatus, To process the connection procedure of the backhaul terminal to the specific core network.

According to a third aspect of the present invention, there is provided an operation method of a terminal device, comprising: an information holding step of holding device information of a specific network device belonging to a specific core network, which is distinguished from a commercial core network; A request providing step of providing a connection request to the core network to a base station apparatus; And providing the pre-stored device information to the base station device when providing the connection request, wherein the base station device processes the connection procedure of the terminal device to the specific core network through the specific network device among the plurality of network devices The connection control step.

Preferably, the specific network device belongs to a backhaul agent that realizes a backhaul between a device and the commercial core network in a wireless manner, and the device information of the specific network device includes information indicating that the terminal device is connected to the device and the commercial core network It can be held only in the case of a backhaul terminal that implements the backhaul in a wireless manner.

Thus, according to the backhaul system of the present invention and the method of operating a terminal device and a terminal device applied thereto, it is possible to provide a backhaul system for a specific purpose, such as a backhaul terminal acting as a router in a wireless backhaul, It is possible to use a separate network device (specific MME) different from the device (commercial MME), thereby deriving the effect that the core network can be separated and operated for the terminal of the general user and the terminal for the specific use, respectively. In addition, it is expected that a specific QoS (Quality of Service) policy for the data processing of the backhaul terminal is provided through each core network separation operation.

FIG. 1 is a configuration diagram illustrating a communication system to which a terminal device according to a preferred embodiment of the present invention is applied.
2 is a block diagram showing a specific configuration of a terminal device according to a preferred embodiment of the present invention.
3 is a flowchart illustrating an operation method of a terminal according to a preferred embodiment of the present invention.
4 is a configuration diagram illustrating a backhaul system in which a terminal device according to a preferred embodiment of the present invention is applied as a backhaul terminal.
5 is a block diagram illustrating a specific configuration of a backhaul agent and a backhaul terminal in a backhaul system according to a preferred embodiment of the present invention.
6 is an exemplary view showing an example of the structure of a backhaul system according to a preferred embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

1 is a diagram illustrating a communication system to which a terminal device according to a preferred embodiment of the present invention is applied.

1, the communication system includes a base station apparatus 40 and a terminal apparatus 300 which attempts to access a core network by providing a connection request to the core network to the base station apparatus 40 do.

Here, the terminal device 300 proposed by the present invention always holds the device information of the specific network device irrespective of the presence or absence of the previously connected network device.

Here, the network device referred to above refers to a network device that determines the signal control between the base station apparatus and equipment (e.g., SGW (Serving Gateway)) in the core network and where to route incoming calls (e.g., communication packets) As a device that plays a role, it is preferable to be an MME (Mobility Management Entity).

Hereinafter, the name of the network device and the name of the MME will be used for convenience of explanation.

That is, the terminal device 300 always holds the device information of the specific network device, that is, the specific MME, irrespective of the presence of the previously connected network device, that is, the MME previously connected thereto.

In order to attempt connection to the core network, the terminal device 300 provides the base station device 40 with a connection request to the core network.

For example, when the terminal apparatus 300 is switched from the power-off state to the on-state, the terminal apparatus 300 is switched to the power-on state and simultaneously tries to connect to the core network through the connected base station, This will be the same not only in the terminal device 300 of the present invention but also in a general existing terminal (hereinafter referred to as a terminal of a general user).

However, when the terminal device 300 of the present invention attempts to connect to the core network by providing a connection request for the core network to the base station device 40 as described above, To the base station device (40).

In other words, when the terminal apparatus 300 of the present invention provides a connection request to the base station apparatus 40 to the core network, the terminal apparatus 300 of the present invention always provides the device information of the specific MME, will be.

When a connection request to the core network is received from a terminal attempting to connect to the core network, the general base station apparatus determines whether the MME device information has been received from the terminal.

If the MME device information is not received together with the connection request to the core network, the base station apparatus determines the MME according to a round robin scheme or a weight factor-based scheme based on MME among a plurality of MMEs interworking with the base station apparatus itself And processes the connection procedure of the terminal to the core network through the determined MME.

On the other hand, if the device information of the MME is received together with the connection request to the core network, the base station apparatus processes the connection procedure of the terminal to the core network only through the corresponding MME according to the device information, without determining the MME .

This is because when the terminal of the general user provides the access request to the base station to the base station apparatus, the apparatus information of the MME stored therein is provided together with the base station apparatus only when the previous (previous) This is due to the technical background.

In this regard, the base station apparatus 40 applied to the present invention also works with a plurality of network devices, that is, a plurality of MMEs.

Here, as shown in FIG. 1, a plurality of MMEs interworking with the base station apparatus 40 include at least one commercial network apparatus (for example, MME_1, MME_2, MME_3) belonging to the commercial core network 10, (E.g., a backhaul agent MME) that belongs to the network 120.

Hereinafter, for convenience of description, reference numeral 22 is used for a commercial MME belonging to the commercial core network 10, and reference numeral 122 is used for a specific MME belonging to a specific core network 120 would.

Accordingly, when the access request to the core network is received from the terminal attempting to access the core network, the base station apparatus 40 also determines whether the MME device information has been received from the terminal.

Accordingly, when the MME device information is not received together with the connection request to the core network, that is, when a connection request to the core network is provided, the base station apparatus 40 transmits the MME's device information to the base station apparatus 40 and the commercial MME 22 in accordance with a round robin scheme or a weight factor based scheme based on the MME among the commercial network devices (e.g., MME_1, MME_2, and MME_3) (10).

At this time, the terminal not providing the device information of the MME will necessarily be a general existing terminal (terminal of the general user).

Meanwhile, when the MME device information is received together with the connection request to the core network, that is, when the access request to the core network is provided, the base station device 40 determines the MME , The terminal access procedure to the core network is processed only through the corresponding MME according to the device information.

At this time, the terminal providing the device information of the MME may be a general existing terminal (terminal of the general user) in which the device information of the commercial MME connected in the previous (immediately before) is stored therein, 300).

However, if the terminal providing the device information of the MME is a general existing terminal (terminal of the general user), the device information of the MME to be provided will be the device information of the commercial MME 22 connected before (immediately before) If the terminal providing the device information of the MME 122 is the terminal device 300 of the present invention, the device information of the MME to be provided may be the device information of the specific MME 122. [

In other words, the terminal device 300 of the present invention always transmits the device information of the specific MME 122, which is fixedly held in advance, to the base station device 40 when providing the connection request for the core network to the base station device 40, The base station apparatus 40 processes the connection procedure of the terminal apparatus 300 to the specific core network 120 to which the specific MME 122 belongs via the specific MME 122 among the plurality of MMEs To do so.

Hereinafter, the configuration of a terminal device according to a preferred embodiment of the present invention will be described in more detail with reference to FIG.

2, the terminal device 300 according to the present invention includes an information holding unit 350 that holds device information of a specific network device belonging to a specific core network, which is different from a commercial core network, A request providing unit 360 for providing a connection request for the network to the base station apparatus 40 and a request providing unit 360 for providing the previously stored apparatus information to the base station apparatus 40 when the connection request is provided, And a connection control unit 370 for processing the connection procedure of the terminal device 300 to the specific core network through the specific network device among the network devices of the core network.

Here, it is preferable that the above-mentioned network device is an MME. Hereinafter, the name of the network device and the name of the MME will be used for convenience of explanation.

The information holding unit 350 holds device information of a specific network device belonging to a specific core network 120, that is, a specific MME, which is different from the commercial core network 10.

Hereinafter, for convenience of explanation, the specific MME 122 of FIG. 1 will be described as a specific network device.

That is, the information holding unit 350 always holds the device information of the specific MME 122 belonging to the specific core network 120 irrespective of the presence of the previously connected network device, that is, the previously connected MME.

The request providing unit 360 provides a connection request to the core network to the base station apparatus 40. [

That is, the request providing unit 360 provides a connection request to the core network to the base station apparatus 40 in order to attempt connection to the core network.

For example, when the terminal apparatus 300 is switched from the off state to the on state, the request providing unit 360 is switched to the power on state and at the same time, transmits a connection request to the core network to the access base station, 40, thereby attempting to connect to the core network through the base station apparatus 40. [

The connection control unit 370 may provide the previously stored device information to the information holding unit 350 together with the base station device 40 when providing the connection request to the core network by the request providing unit 360, 40 allows a plurality of network devices, that is, a specific one of a plurality of MMEs, that is, a specific MME 122, to process a connection procedure of the terminal device 300 to a specific core network 120.

In other words, when the connection control unit 370 attempts to connect to the core network by providing the connection request for the core network to the base station apparatus 40 as described above, the connection control unit 370 always transmits the connection request of the fixed MME 122 And provides the device information to the base station device 40.

The base station apparatus 40 interfaces with a plurality of network devices, that is, a plurality of MMEs.

Here, as shown in FIG. 1, a plurality of MMEs interworking with the base station apparatus 40 include at least one commercial network apparatus (for example, MME_1, MME_2, MME_3) belonging to the commercial core network 10, (E.g., a backhaul agent MME) that belongs to the network 120.

Hereinafter, for convenience of description, reference numeral 22 is used for a commercial MME belonging to the commercial core network 10, and reference numeral 122 is used for a specific MME belonging to a specific core network 120 would.

Accordingly, when the connection request for the core network is received from the terminal device 300, the base station device 40 determines whether the device information of the MME has been received from the terminal device 300. [

As described above, since the terminal device 300 of the present invention provides the device information of the specific MME 122 that is fixedly held at the time of the connection request to the core network, the base station device 40 can access the core network The access procedure to the specific core network 120 is performed only through the specific MME 122 according to the device information, without the process of determining the MME, for the terminal device 300 providing the device information of the specific MME 122, .

Hereinafter, a method of operating a terminal according to a preferred embodiment of the present invention will be described in detail with reference to FIG.

For convenience of explanation, the reference numerals of FIGS. 1 and 2 will be described.

The operation method of the terminal device 300 according to the present invention always holds the device information of the specific network device, that is, the specific MME, irrespective of the presence of the previously connected network device, that is, the MME previously connected thereto.

Hereinafter, for convenience of explanation, the specific MME 122 of FIG. 1 will be described as a specific network device.

That is, the operation method of the terminal device 300 according to the present invention can be applied to a specific core network 120 distinguished from the commercial core network 10, regardless of whether a previously connected network device, that is, It always holds the device information of the specific MME 122 to which it belongs.

In the method of operating the terminal device 300 according to the present invention, when attempting to connect to the core network, for example, when the power is turned on (S300), the device information of the specific MME 122 held S310).

The operation method of the terminal device 300 according to the present invention provides a connection request to the core network to the base station device 40 in order to attempt connection to the core network. Information to the base station apparatus 40 (S320).

Upon receiving a connection request for the core network from the terminal device 300, the base station device 40 determines whether the device information of the MME has been received from the terminal device 300 (S330).

As described above, the terminal device 300 of the present invention provides the device information of the specific MME 122 fixedly held at the time of the connection request to the core network, (S340 Yes), the access procedure to the specific core network 120 is performed through the specific MME 122 according to the device information, without determining the MME, for the terminal device 300 (S350).

As described above, according to the operation method of the terminal device and the terminal device according to the present invention, it is possible to allow the terminal for specific use, that is, the terminal device 300, to access the specific MME 122 And always provides the device information of the specific MME 122 when attempting to connect to the core network so that the commercial MME 122 used by the terminal of the general user for the specific use terminal device 300 It is possible to use a separate specific MME 122 that is different from the core network 22 so that the core network can be connected to the core network 10 and the specific core network 120, Respectively.

Hereinafter, the terminal device 300 according to the present invention, that is, the terminal device 300 for a specific use, is preferably a backhaul terminal for implementing a backhaul between the device and the commercial core network 10 in a wireless manner Do.

In other words, it is preferable that the device information of the specific MME 122 be retained only when the terminal device 300 is a backhaul terminal that implements a backhaul between the device and the commercial core network 10 in a wireless manner.

In addition, the specific network device, that is, the specific MME 122 described above, preferably belongs to a backhaul agent that implements a backhaul between the device and the commercial core network 10 in a wireless manner. Further, (120).

Hereinafter, a backhaul system implemented by the backhaul agent 100 and the backhaul terminal 200 will be described with reference to FIG. 4, where a terminal device according to the present invention is applied as a backhaul terminal 200. FIG.

4, the backhaul system according to the present invention is a system for implementing a backhaul between the device 50 and the commercial core network 10 in a wireless manner.

That is, the backhaul system of the present invention is intended to implement the backhaul between the device 50 and the commercial core network 10 in a wireless manner while improving all the disadvantages of the existing mmWave-based wireless backhaul, and uses a relatively low frequency By utilizing the base station device 40 based on the mobile communication, the device 50 and the commercial core network 10, which may be free from line of sight (LOS) constraints, short effective transmission distance limitations, We want to implement backhaul wirelessly.

If the backhaul between the device 50 and the commercial core network 10 is implemented in a wireless manner by utilizing the base station device 40 of a general mobile communication instead of the MMWave-based wireless backhaul using a transmission / reception period independent transmission scheme, A base station (LTE or 3G) belonging to the core network 50 must have a corresponding core network equipment in communication between the terminal and the base station (LTE or 3G) Encapsulation / de-encapsulation must be repeated several times (at least twice) in the commercial core network 10 since encapsulation is performed several times (at least twice) , And in the case of the downlink, encapsulation must be repeated several times in the commercial core network 10 before the backhaul signal of the base station descends from the commercial core network 10, contrary to the uplink.

As described above, when the encapsulation / de-encapsulation is repeated several times in the commercial core network 10, the backhaul signal is repeatedly encapsulated / de-encapsulated in the core network equipment The SGW 24 and the PGW 26 are repeated several times so that an additional latency of the long distance transmission occurs and the processing capacity of the equipment (e.g., the SGW 24 and the PGW 26) Is expected to increase.

Therefore, the backhaul system of the present invention adopts the backhaul agent 100 to implement the backhaul between the device 50 and the commercial core network 10 wirelessly using the base station device 40, Encapsulation / De-encapsulation We want to avoid repetitive processing problems.

If the backhaul between the device 50 and the commercial core network 10 is implemented in a wireless manner using the base station device 40, the transmission path of the communication packet is divided for each base station (LTE or 3G) belonging to the device 50 .

Therefore, the backhaul system of the present invention adopts the backhaul terminal 200, so that the backhaul agent 100 and the backhaul terminal 200 are equipped with a function for distinguishing transmission paths of communication packets for each base station, thereby preventing the problem I want to.

Hereinafter, for convenience of explanation, the backhaul system of the present invention will be described with reference to a communication packet transmission path of an uplink among uplink / downlink communication packet transmission paths.

The backhaul terminal 200 of the present invention transmits a backhaul signal (uplink) from at least one device 50 connected thereto to the base station apparatus 40 via a wireless scheme.

At this time, the device 50 may be an LTE base station 1 (e.g., an LTE macro base station, an LTE small base station), a 3G base station 2, a WiFi AP 3, It is possible.

Therefore, it is preferable that the backhaul terminal 200 has an interface conversion function so that it can be connected to the device through a communication method (for example, IP communication, E1 line) supported by each of the devices 50. [

In this case, since the backhaul between the base station and the commercial core network 10 is implemented in a wireless manner, the LTE base station 1 and the 3G base station 2 as a device connected to the backhaul terminal 200 I will mention it.

When the LTE base station 1 and the 3G base station 2 receive an uplink signal from a terminal wirelessly connected thereto, the LTE base station 1 and the 3G base station 2 perform tunneling to a communication packet according to the uplink signal.

Hereinafter, the LTE base station 1 and the 3G base station 2 will be described for convenience of explanation.

That is, the LTE base station 1 transmits, to the communication packet according to the uplink signal of the terminal, a network equipment in the LTE core network 20, for example, SGW 24 The first communication packet is generated through tunneling to insert (encapsulate) the first path information for transmitting the communication packet to the first communication path.

When receiving the first communication packet, that is, the backhaul signal of the LTE base station 1, from the LTE base station 1, the backhaul terminal 200 performs identification for identifying the device that generated the first communication packet, that is, the LTE base station 1 Inserts the path information into the first communication packet, and transmits the path information to the base station apparatus 40 via the wireless scheme.

Hereinafter, for convenience of description, the first communication packet after the identification route information is inserted (encapsulated) by the backhaul terminal 200 will be referred to as a first communication packet '.

At this time, the identification path information included in the backhaul terminal 200 includes address information (IP) of the corresponding device, that is, the LTE base station 1, An identifier (e.g., Flag) is included.

Upon receiving the uplink signal from the backhaul terminal 200, that is, the first communication packet of the LTE base station 1, the base station apparatus 40 transmits the first communication packet to the backhaul agent 100 of the present invention The second communication packet is generated through tunneling to insert (encapsulate) the second path information for the first communication packet.

The base station apparatus 40 may be an LTE macro base station or an LTE small base station as an LTE base station, and will be described below as an LTE macro base station or an LTE eNB for convenience of explanation.

That is, when receiving the uplink signal from the backhaul terminal 200, that is, the first communication packet of the LTE base station 1, the LTE eNB 40 adds the backhaul agent 100 of the present invention to the received first communication packet ' The second communication packet is generated through tunneling for inserting (encapsulating) the second path information to be transmitted to the second communication device.

The LTE eNB 40 then provides the second communication packet generated as described above to the backhaul agent 100 according to the second route information.

4, the commercial core network 10 includes an LTE core network 20, an RNC 32, an SGSN 34, and an SGSN 34, which are composed of an MME 22, an SGW 24, a PGW 26, A GGSN 36, and the like.

Therefore, the backhaul agent 100 of the present invention can be interworked with a corresponding core network through a communication method (for example, IP communication, E1 line) supported by each of the LTE core network 20 and the 3G core network 30 , And an interface conversion function.

When the backhaul agent 100 receives the second communication packet generated by inserting (encapsulating) the second path information into the first communication packet 'from the LTE eNB 40 as described above, (De-encapsulates) the second path information.

The backhaul agent 100 transmits a first communication packet obtained by deleting the second path information in the second communication packet and also deleting (de-encapsulating) the path information for identification, that is, the backhaul signal of the LTE base station 1 (First path information + communication packet) to the LTE core network 20 and the LTE core network 20 deletes (de-encapsulates) only the first path information and then transmits a communication packet To the external network (5).

In other words, the backhaul system of the present invention is capable of transmitting the backhaul signal (uplink) between the LTE base station 1 and the LTE core network 20 using the LTE eNB 40, So that encapsulation is not repeated a number of times.

At this time, if the backhaul agent 100 includes the address information (IP) of the LTE base station 1 in the identification route information inserted (encapsulated) in the first communication packet by the backhaul terminal 200, (IP) of the LTE base station 1 from the path information for identification of the first communication packet 'obtained by deleting the second path information in the second communication packet, The communication packet transmission path of the base station 1 can be distinguished.

On the other hand, if the backhaul terminal 200 includes the unique identifier (e.g., Flag) in the identification path information inserted (encapsulated) in the first communication packet, (E.g., Flag) of the corresponding device, that is, the unique identifier (e.g., Flag) of the LTE base station 1 in the identification path information of the first communication packet 'obtained by deleting the second path information from the packet, It is possible to distinguish the communication packet transmission path.

Therefore, the backhaul system according to the embodiment of the present invention can transmit the backhaul signal (uplink) between the LTE base station 1 and the LTE core network 20 using the LTE eNB 40, The communication packet transmission path of the LTE base station 1 can be distinguished through the function for classifying the communication packet transmission path for each device (base station) mounted on the backhaul terminal 200. [

Of course, the backhaul system according to the embodiment of the present invention is also applicable to a downlink communication packet transmission path that is processed inversely to the communication packet transmission path of the uplink, as described above, encapsulation in the LTE core network 20 The downlink communication packet transmission to the LTE base station 1 is performed through the function for classifying the communication packet transmission path for each device (base station) mounted on the backhaul agent 100 and the backhaul terminal 200, The path can be distinguished.

In the embodiment using the unique identifier (e.g., Flag) for distinguishing the communication packet transmission path, the backhaul terminal 200 has a new system for managing and managing a unique identifier (e.g., Flag) for at least one device It is judged that the embodiment using the address information (IP) of the device is more efficient.

Therefore, in the following description, the address information (IP) of the device is used to distinguish the communication packet transmission path.

As described above, the backhaul system according to the preferred embodiment of the present invention realizes the backhaul between the base station and the core network in a wireless manner by using the base station apparatus 40, that is, the LTE eNB 40, It is possible to prevent a problem that is a concern, for example, a problem of encapsulation / de-encapsulation repetition processing of a core network, and a problem that a communication packet transmission path can not be distinguished for each device (base station).

At this time, as shown in FIG. 4, a general LTE terminal 60 other than the backhaul terminal 200 is connected to the LTE eNB 40 to use the mobile communication service.

However, as described with reference to FIGS. 1 and 2, the backhaul terminal 200, which is a terminal device proposed by the present invention, is a device information of a specific MME 122 fixedly held at the time of connection to the core network The LTE eNB 40 can be implemented in the backhaul agent 100 only through the MME 122 belonging to the backhaul agent 100 according to the provided device information for the backhaul terminal 200 (The core function 120 of FIG. 5).

Thus, in the backhaul system according to the present invention, the backhaul terminal 200 connected to the LTE eNB 40 is necessarily connected to the backhaul agent 100.

Meanwhile, the LTE terminal 60, which is a general existing terminal (general user terminal), transmits the MMEs stored therein only when there is an MME connected before (immediately before) when attempting to connect to the core network, The LTE eNB 40 does not provide the commercial MME 22 with respect to the LTE terminal 60 in any case because it does not provide the device information (e.g., the device information of the commercial MME 22) It will handle the access procedure to the commercial core network 10, particularly the LTE core network 20.

Therefore, in the backhaul system according to the present invention, in the case of a terminal (for example, the LTE terminal 60) of a general user connected to the LTE eNB 40, the LTE eNB 40 is not connected to the backhaul agent 100, To be connected to the network (20).

As a result, in the backhaul system of the present invention, the terminal of a specific use, that is, the backhaul terminal 200 is caused to hold the device information of the specific MME 122 regardless of the presence of the previously connected network device, that is, It is possible to provide the device information of the specific MME 122 together with the backhaul terminal 200 separately from the commercial MME 22 used by the general user terminal (for example, the LTE terminal 60) The core network 10 and the backhaul agent (not shown) can be used for the general user terminal (e.g., the LTE terminal 60) and the backhaul terminal 200 for the specific use 100 to the specific core network 120, respectively.

Also, in the backhaul system of the present invention, the core network is separated and operated for a general user terminal (for example, the LTE terminal 60) and a specific use backhaul terminal 200 in the same manner as described above, (QoS) policy for data processing of the mobile terminal 200 can be expected.

In addition, it is expected that a specific QoS (Quality of Service) policy for the data processing of the backhaul terminal is provided through each core network separation operation.

Hereinafter, the functions and specific configurations of the backhaul agent 100 and the backhaul terminal 200 according to the preferred embodiment of the present invention will be described in detail with reference to FIG.

In particular, the backhaul terminal 200 includes an information holding unit 250 that performs the same function as the information holding unit 350, the request providing unit 360, and the connection control unit 370 described above with reference to FIG. 2, (260) and a connection control unit (270).

Thus, the backhaul terminal 200 is switched to the power-on state and at the same time, attempts to connect to the core network by providing a connection request to the core network to the connection base station, that is, the LTE eNB 40, And provides the LTE eNB 40 with the device information of the specific MME 122 held therein regardless of the presence or absence of the MME.

Thus, the LTE eNB 40 is able to communicate with the backhaul terminal 200 only in the specific MME 122 according to the provided device information, that is, within the backhaul agent 100 only through the MME 122 belonging to the backhaul agent 100 It will process the connection procedure to the core network 120, which is a specific core network.

Thereafter, the backhaul terminal 200 will be connected to at least one device 50 that wishes to transmit backhaul signals, i.e., communication packets, through the backhaul system of the present invention.

Hereinafter, among the uplink communication packet transmission path (a) and the downlink communication packet transmission path (b), the uplink communication packet transmission path (a) will be mainly described for convenience of explanation.

5, LTE base station 1 and 3G base station 2 will be described as devices connected to backhaul terminal 200 for convenience of explanation.

That is, the LTE base station 1 transmits, to the communication packet according to the uplink signal of the terminal, a network equipment in the LTE core network 20, for example, SGW 24 The first communication packet is generated through tunneling to insert (encapsulate) the first path information to be transmitted to the first communication device.

In addition, the 3G base station 2 transmits, to the communication packet according to the uplink signal of the terminal, a network equipment (e.g., RNC 32) in the 3G core network 30 to which a call The first communication packet is generated through tunneling to insert (encapsulate) the first path information to be transmitted to the first communication device.

The LTE base station 1 and the 3G base station 2 then transmit the first communication packet generated through the tunneling for inserting the first path information into the communication packet according to the uplink signal of the terminal as a backhaul terminal 200).

5, the backhaul terminal 200 according to the preferred embodiment of the present invention includes a packet receiving unit 210, a gateway function unit 230, and a modem unit 240 .

The packet transmission and reception unit 210 receives a first communication packet in which the first path information is inserted from at least one device 50 connected to the backhaul terminal 200, that is, the LTE base station 1 or the 3G base station 2, That is, a backhaul signal.

At this time, the LTE base station 1 will provide the backhaul signal to the backhaul terminal 200 through the IP communication, and the 3G base station 2 will provide the backhaul signal to the backhaul terminal 200 through the E1 line.

The backhaul terminal 200 of the present invention performs an interface conversion function so as to be able to be connected through a communication method (e.g., IP communication, E1 line) supported by each of the LTE base station 1 and the 3G base station 2 And an interface converting unit 220. [

For example, based on the virtual IP address assigned to the 3G base station 2 connected to the backhaul terminal 200, the interface converter 220 converts the IP address of the 3G The backhaul signal of the base station 20, that is, the first communication packet, is converted into the first communication packet based on the IP provided to the 3G base station 2, and the backhaul signal of the 3G base station 20, To the first communication packet based on the E1 line and transmit the first communication packet to the packet transmission / reception unit 210.

The gateway function unit 230 is a functional unit that performs a function for identifying a transmission path of a communication packet for each device (base station).

The gateway function unit 230 inserts identification path information for identifying the device that generated the first communication packet into the first communication packet.

That is, when the backhaul signal of the LTE base station 1, that is, the first communication packet, is received through the packet transmission / reception unit 210, the gateway function unit 230 transmits identification path information for identifying the LTE base station 1 Into the first communication packet of the LTE base station 1. [

Of course, when the backhaul signal of the 3G base station 2, that is, the first communication packet, is received through the packet transmission / reception unit 210, the gateway function unit 230 transmits identification path information for identifying the 3G base station 2 Into the first communication packet of the 3G base station 2 converted into the IP-based in the interface conversion unit 220.

Hereinafter, for convenience of explanation, it is assumed that the backhaul signal of the LTE base station 1, that is, the first communication packet is received.

5, the first communication packet received from the LTE base station 1, that is, the backhaul signal of the LTE base station 1, is transmitted to the payload of the communication packet from the terminal, The first path information specifying the IP as the destination address (DIP) and the address information (IP) of the LTE base station 1 as the source address (SIP) is inserted as a header.

More specifically, the gateway function unit 230 stores in the backhaul signal of the LTE base station 1, that is, the first communication packet, received in the above-described manner, path information for identifying LTE base station 1 (Encapsulation) is performed.

Hereinafter, for convenience of explanation, the first communication packet after the gateway function unit 230 inserts (encapsulates) the identification path information into the first communication packet is referred to as a first communication packet ' would.

At this time, the identification path information for identifying the LTE base station 1 includes the address information (IP) of the LTE base station 1.

For example, the identification route information for identifying the LTE base station 1 is transmitted to the gateway functional unit 130 in the backhaul agent 100, which will be described later in correspondence with the gateway functional unit 230 in the backhaul terminal 200 Designates the address information (IP) as the destination address (DIP), designates the address information (IP) of the backhaul terminal 200 as the source address (SIP), and the address information (IP) of the LTE base station 1 as the tunneling ID (TEID).

The modem unit 240 transmits the first communication packet 'in which the gateway function unit 230 has inserted the identification path information to the base station apparatus 40, as described above.

In other words, the modem unit 240 processes the first communication packet 'of the LTE base station 1 as an LTE radio signal and transmits it to the base station apparatus 40, that is, the LTE eNB 40 via the LTE radio system.

As described above, the backhaul terminal 200 of the present invention inserts (encapsulates) the path information for identification into the backhaul signal, i.e., the first communication packet, of the LTE base station 1 connected to the backhaul terminal 200 according to the present invention, to the eNB 40.

When the uplink signal, that is, the first communication packet of the LTE base station 1, is received from the backhaul terminal 200, the base station apparatus 40, that is, the LTE eNB 40 transmits a second path to the received first communication packet ' And generates a second communication packet.

That is, upon receiving the uplink signal from the backhaul terminal 200, that is, the first communication packet 'of the LTE base station 1, the LTE eNB 40 transmits the first communication packet' of the LTE base station 1 to the corresponding backhaul terminal Tunneling for inserting (encapsulating) the second path information for sending to the SGW 124 in the core function unit 120 of the backhaul agent 100, which will be described later, To generate a second communication packet.

In this case, the second communication packet is a message in which the first communication packet 'from the backhaul terminal 200 is loaded in the payload, the IP of the SGW 124 is designated as the destination address (DIP), and the address information of the LTE eNB 40 IP) as a source address (SIP) is inserted as a header.

The LTE eNB 40 provides the second communication packet generated as described above to the backhaul agent 100 of the present invention in accordance with the second path information.

5, the backhaul agent 100 according to the preferred embodiment of the present invention includes a packet receiving unit 110, a core function unit 130, and a gateway function unit 130 do.

In addition, the backhaul agent 100 of the present invention can be linked to a corresponding core network through a communication method (e.g. IP communication, E1 line) supported by each of the LTE core network 20 and the 3G core network 30 And an interface conversion unit 140 for performing an interface conversion function.

For example, based on the virtual IP assigned to the 3G base station 2 by the interface conversion unit 220, which is a corresponding configuration in the above-described backhaul terminal 200, the interface conversion unit 140 converts, That is, the IP-based first communication packet, into the first communication packet based on the E1 line, and transmits the first communication packet to the 3G core network 30 at the downlink time, and the E1 line at the downlink packet transmission / The first communication packet of the received 3G base station 20 can be converted into the first communication packet based on the IP.

The packet transmission / reception unit 110 receives the second communication packet of the LTE base station 1 from the base station apparatus 40, that is, the LTE eNB 40 as described above.

The core function unit 120 deletes the second path information in the second communication packet of the received LTE base station 1. [

5, the core function unit 120 is a specific core network implemented in the backhaul agent 100. In the LTE core network 20, the core function unit 120 encapsulates / de-encapsulates path information The MME 122, the SGW 124, and the PGW 126, which correspond to the MME 22, the SGW 24, and the PGW 26,

More specifically, the core function unit 120, in particular, the SGW 124, transmits the second communication packet of the received LTE base station 1 to the core function unit 120, in particular, to the SGW 124 , And the PGW 126 deletes (de-encapsulates) the second path information in the second communication packet and provides it to the gateway functional unit 130 according to the identification path information of the first communication packet '.

The gateway function unit 130 is a functional unit that performs a function for identifying a transmission path of a communication packet for each device (base station).

When the first communication packet 'is obtained after the second path information is deleted from the second communication packet of the LTE base station 1 by the core function unit 120, the gateway functional unit 130 transmits the first communication packet' (I.e., the first path information + the communication packet) of the LTE base station 1 to the LTE core network 20, that is, the first To the SGW 24 according to the first path information of the communication packet.

At this time, the core function unit 120 extracts, from the tunneling ID (TEID) more specifically the address information of the device, that is, the LTE base station (IP) of the LTE base station 1 and can distinguish the communication packet transmission path of the LTE base station 1 based on the information.

Therefore, in the LTE core network 20, only the first path information is deleted from the first communication packet provided from the backhaul agent 100, that is, the backhaul signal (first path information + communication packet) of the LTE base station 1 The communication packet according to the uplink signal of the terminal can be exported to the external network 5. [

5, in the uplink communication packet transmission path (a), in the case of the backhaul system according to the present invention, the communication packet transmission path (a) from the device (for example, the LTE base station 1) A first communication packet identical to the backhaul signal (first communication packet) can be transmitted from the backhaul agent 100 to the LTE core network 20. [

Of course, according to the backhaul system of the present invention, it is obvious that the communication packet transmission path b of the downlink will be handled opposite to the communication packet transmission path a of the above-mentioned uplink.

In the backhaul system according to the present invention, in the downlink communication packet transmission path (b), the same backhaul signal as the first communication packet received from the LTE core network 20 to the backhaul agent 100 Communication packet) may be transmitted to the corresponding device (e.g., LTE base station 1) at the backhaul terminal 200 side.

4 and 5, the backhaul system of the present invention is implemented by adopting one backhaul agent 100 and the backhaul terminal 200, but this is only the simplest implementation method for explanation.

Alternatively, the backhaul system of the present invention may be implemented as a cascade-type implementation by adopting a plurality of backhaul agents # 1, # 2 ... #N and # 1, # 2, ..., have. 6 shows an example of the backhaul system of the present invention in which a plurality of backhaul agents # 1, # 2 ... #N and backhaul terminals # 1, # 2, ..., .

In this way, the backhaul terminals # 1, # 2 ... # N are superimposed on each other by using a device connected to the backhaul terminal # 1, that is, the LTE base station, as a communication packet transmission path for another backhaul terminal # 2, The backhaul system of the present invention can be implemented by overlaying the backhaul agents # 1, # 2, ..., #N by the number of overlapping implementations of the backhaul terminals # 1, # 2 ... #N.

As described above, the backhaul system according to the preferred embodiment of the present invention realizes the backhaul between the base station and the core network in a wireless manner by utilizing the base station apparatus 40, that is, the LTE eNB 40, It is possible to prevent a problem that can not be distinguished by a problem (e.g., encapsulation / de-encapsulation repetition processing of the core network) and a communication packet transmission path for each device (base station).

In addition, the backhaul system according to the preferred embodiment of the present invention proposes a backhaul agent and a backhaul terminal as described above, and realizes a wireless backhaul in which all the disadvantages of the existing mmWave-based wireless backhaul are improved. In particular, (A specific MME) different from the network device (commercial MME) used by the terminal of the general user can be used for the backhaul terminal serving as the router in the method backhaul, The core network is separated and operated.

A method of operating a terminal according to an embodiment of the present invention may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions recorded on the medium may be those specially designed and constructed for the present invention or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, but, on the contrary, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

According to the backhaul system of the present invention and the operation method of the terminal device and the terminal device applied thereto, a backhaul between a base station and a core network is implemented in a wireless manner using a base station device of a mobile communication, In order to avoid problems expected in the future, and to separate and operate core networks for end-user terminals and backhaul terminals, overcoming the limitations of existing technologies, The possibility of commercialization or operation of the device is not only sufficient but also practically possible because it is practically possible to use the invention.

300: terminal device
350: information holding unit 360:
370:

Claims (7)

In the terminal device,
An information holding unit for holding device information of a specific network device belonging to a specific core network that is different from a commercial core network;
A request providing unit for providing a connection request for the core network to the base station apparatus; And
When the connection request is provided, providing the pre-stored device information to the base station apparatus so that the base station apparatus can process the connection procedure of the terminal apparatus to the specific core network through the specific network apparatus among the plurality of network apparatuses And a connection control unit for enabling the terminal apparatus to communicate with the terminal apparatus. The method according to claim 1,
The plurality of network devices comprising:
A commercial network device belonging to the commercial core network,
And the specific network device belonging to a backhaul agent that implements a backhaul between the device and the commercial core network in a wireless manner. 3. The method according to claim 1 or 2,
Wherein the device information of the specific network device comprises:
Wherein the terminal device is held only when the backhaul terminal realizes a backhaul between the device and the commercial core network in a wireless manner. The method comprising: receiving identification information for identifying a device that has generated the first communication packet when the first communication packet is received from at least one device that generates a first communication packet by inserting first path information into the communication packet; A backhaul terminal inserted into the first communication packet and transmitted to the base station apparatus; And
When receiving the second communication packet from the base station apparatus that inserts second path information into the first communication packet received from the backhaul terminal and generates a second communication packet, And a backhaul agent for deleting the identification path information and providing the first communication packet to a commercial core network, wherein only the first path information is deleted from the first communication packet in the commercial core network;
The backhaul terminal includes:
Wherein the backhaul system is connected to a specific core network to which the specific network device belongs through a specific network device in the backhaul agent. 5. The method of claim 4,
The backhaul terminal includes:
Providing a connection request for the core network to the base station apparatus, providing the apparatus information of the specific network apparatus held by the base station apparatus to the base station apparatus, And to process the connection procedure of the backhaul terminal. A method of operating a terminal device,
An information holding step of holding device information of a specific network device belonging to a specific core network that is different from a commercial core network;
A request providing step of providing a connection request to the core network to a base station apparatus; And
When the connection request is provided, providing the pre-stored device information to the base station apparatus so that the base station apparatus can process the connection procedure of the terminal apparatus to the specific core network through the specific network apparatus among the plurality of network apparatuses And a connection control step of allowing the terminal device to access the terminal device. The method according to claim 6,
The specific network device comprises:
Device and a backhaul agent that implements a backhaul between the device and the commercial core network in a wireless manner,
Wherein the device information of the specific network device comprises:
Wherein the terminal device is held only when the backhaul terminal implements the backhaul between the device and the commercial core network in a wireless manner.

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