KR102052966B1 - Backhaul system and control method thereof - Google Patents
Backhaul system and control method thereof Download PDFInfo
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- KR102052966B1 KR102052966B1 KR1020140109152A KR20140109152A KR102052966B1 KR 102052966 B1 KR102052966 B1 KR 102052966B1 KR 1020140109152 A KR1020140109152 A KR 1020140109152A KR 20140109152 A KR20140109152 A KR 20140109152A KR 102052966 B1 KR102052966 B1 KR 102052966B1
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- communication packet
- backhaul
- path information
- base station
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/14—Backbone network devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
- H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W40/00—Communication routing or communication path finding
- H04W40/34—Modification of an existing route
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Abstract
The present invention, while implementing a backhaul between the base station and the core network in a wireless manner by using a base station device of the mobile communication, the control of the backhaul system and backhaul system that can prevent the problems expected by implementing the backhaul in a wireless manner A method, a method of operating a backhaul agent and a backhaul agent, and a method of operating a backhaul terminal device and a backhaul terminal device are proposed.
Description
The present invention relates to a backhaul system, and more particularly, to a method for controlling a backhaul system and a backhaul system to wirelessly implement a backhaul between a base station and a core network, a method of operating a backhaul agent and a backhaul agent, and a backhaul terminal. It relates to a method of operation of the device and the backhaul terminal device.
Although backhaul, which is a connection between a base station and a terminal for a mobile communication service, is wirelessly connected in a standard, it is not necessarily required to use wired or wireless in a standard, and this is an implementation issue that can be selected by an operator implementing a mobile communication network. .
However, in most cases, the backhaul of the base station is implemented in a wired manner that enables stable communication packet transmission, and is implemented in a mmWave-based wireless system only in some regions.
Conventional mmWave-based wireless backhaul implemented in a wireless manner uses a relatively high frequency compared to a mobile communication network such as Long Term Evolution (LTE). The effective transmission distance is several hundred m ~ 2km due to the limitation that can be used only in the line of sight (LOS) environment where there is no obstacle between the base station and the receiver (e.g. core network equipment) and the attenuation of the radio wave according to the distance. There are disadvantages such as limit of accuracy and severe performance deterioration due to precipitation attenuation in rainy weather.
Therefore, at present, in some regions where it is difficult to implement a backhaul in a wired manner, for example, in remote areas or island regions, mmWave-based wireless backhaul is implemented (used) despite the aforementioned disadvantages.
Accordingly, the present invention is to propose a method for implementing a backhaul between the base station and the core network in a wireless manner while improving all the disadvantages of the aforementioned mmWave-based wireless backhaul.
The present invention has been made in view of the above circumstances, and an object of the present invention is to wirelessly implement a backhaul between a base station and a core network.
A backhaul system according to a first aspect of the present invention for achieving the above object, receiving the first communication packet from at least one device for inserting the first path information in the communication packet to generate the first communication packet, A backhaul terminal which inserts identification path information for identifying a device that has generated a first communication packet into the first communication packet and transmits it to the base station apparatus; And receiving the second communication packet from the base station apparatus for generating a second communication packet by inserting second path information into the first communication packet received from the backhaul terminal, and receiving the second path from the second communication packet. And a backhaul agent that deletes the information and the path information for identification and provides the first communication packet to the core network so that only the first path information is deleted from the first communication packet.
Preferably, the identification path information may include address information of the device or a unique identifier assigned to the device by the backhaul terminal.
Preferably, the backhaul agent may classify a communication packet transmission path of the device based on the device address information or the unique identifier in the identification path information.
A backhaul agent according to a second aspect of the present invention for achieving the above object is, the base station device receiving a first communication packet generated by inserting the first path information in the communication packet, the second communication packet to the first communication packet; A packet receiver configured to receive a second communication packet generated by inserting path information; And a core function unit for deleting the second path information from the second communication packet and providing the second path information to a core network so that only the first path information needs to be deleted from the core network.
Preferably, before the second path information is inserted into the first communication packet, identification path information for identifying the device that generated the first communication packet may be inserted into the second communication packet. Can be.
Preferably, the identification path information may include address information of the device or a unique identifier assigned to the device.
Preferably, when the second path information is deleted from the second communication packet by the core function unit, the gateway function unit further provides the first communication packet to the core network by deleting the identification path information. can do.
Preferably, the core function unit may classify a communication packet transmission path of the device based on address information of the device or the unique identifier in the identification path information.
A backhaul terminal device according to a third aspect of the present invention for achieving the above object is a packet for receiving the first communication packet from at least one device for generating a first communication packet by inserting the first path information in the communication packet; Receiving unit; A gateway function unit inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet; And a modem unit transmitting the first communication packet into which the identification path information is inserted, to the base station apparatus.
Preferably, the identification path information may include address information of the device or a unique identifier assigned to the device in the backhaul terminal, which is used to distinguish the communication packet transmission path of the device.
In a method of controlling a backhaul system according to a fourth aspect of the present invention for achieving the above object, a backhaul terminal receives a first communication packet generated by inserting first path information into a communication packet from at least one device. ; The backhaul terminal inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet and transmitting the same to the base station apparatus; Generating, by the base station apparatus, a second communication packet by inserting second path information into the first communication packet received from the backhaul terminal; When the backhaul agent receives the second communication packet from the base station apparatus, the backhaul agent deletes the second path information and the identification path information from the second communication packet and provides the first communication packet to the core network. The core network includes the step of deleting only the first path information from the first communication packet.
In accordance with a fifth aspect of the present invention, there is provided a method of operating a backhaul agent device, the method comprising: receiving a first communication packet generated by inserting first path information into a communication packet; A packet receiving step of receiving a second communication packet generated by inserting second path information into the second communication packet; And transmitting the packet to the core network after deleting the second path information from the second communication packet so that only the first path information is deleted from the core network.
Preferably, before the second path information is inserted into the first communication packet, identification path information for identifying the device that generated the first communication packet may be inserted into the second communication packet. Can be.
Preferably, the packet transmission step may provide the first communication packet to the core network by deleting the second path information and the identification path information from the second communication packet.
Preferably, the identification route information includes address information of the device or a unique identifier assigned to the device, and based on the address information of the device or the unique identifier in the identification route information, The method may further include identifying a communication packet transmission path.
According to a sixth aspect of the present invention, there is provided a method of operating a backhaul terminal device, the method comprising: inserting the first path information into a communication packet to generate the first communication packet from at least one device; Receiving packet receiving step; A path information insertion step of inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet; And a packet transmission step of transmitting the first communication packet into which the identification path information is inserted, to the base station apparatus.
Preferably, the identification path information may include address information of the device or a unique identifier assigned to the device in the backhaul terminal, which is used to distinguish the communication packet transmission path of the device.
Therefore, according to the control method of the backhaul system and the backhaul system according to the present invention, while implementing the backhaul between the base station and the core network in a wireless manner by using the base station apparatus of the mobile communication, the problem expected by implementing the backhaul in a wireless manner Deduce effects that can be prevented beforehand.
1 is a block diagram showing a backhaul system according to a preferred embodiment of the present invention.
2 is a block diagram showing a specific configuration of a backhaul agent and a backhaul terminal according to a preferred embodiment of the present invention.
3 is an exemplary view showing a structure of a backhaul system implemented by a backhaul agent and a backhaul terminal according to a preferred embodiment of the present invention as an example.
4 and 5 are flowcharts illustrating a control method of a backhaul system according to an exemplary embodiment of the present invention on an uplink / downlink basis.
6 is a flowchart illustrating a method of operating a backhaul agent (device) according to a preferred embodiment of the present invention.
7 is a flowchart illustrating a method of operating a backhaul terminal (device) according to a preferred embodiment of the present invention.
Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment of the present invention.
1 is a diagram illustrating a backhaul system according to a preferred embodiment of the present invention.
As shown in FIG. 1, the backhaul system according to the present invention is a system for wirelessly implementing a backhaul between a base station and a core network.
That is, the backhaul system of the present invention intends to implement a backhaul between a base station and a core network in a wireless manner while all of the disadvantages of the existing mmWave-based wireless backhaul, and for this purpose, a base station apparatus based on a mobile communication using a relatively low frequency ( By using 400, we will implement a wireless backhaul between the base station and the core network, which can be free from line of sight (LOS) constraints, short effective transmission distance limits, and severe performance degradation in rainy weather.
However, if the backhaul between the base station and the core network is implemented in a wireless manner using the
As such, if the encapsulation / de-encapsulation is repeated several times in the core network stage, the equipment in the core network (eg, SGW (24) is repeated in the process of repeating the encapsulation / de-encapsulation several times. , PGW (26)) several round trips, resulting in additional latency of long-distance transmission, and increases the processing capacity of equipment (eg SGW (24), PGW (26)) in the core network This is expected.
Therefore, the backhaul system of the present invention, by adopting the
Thus, the backhaul system according to the first embodiment of the present invention will be described.
First, at least one
Here, since the present invention is to implement a backhaul between the base station and the core network in a wireless manner, it will be described with reference to the
In the following description, for convenience of description, the communication packet transmission path of the uplink / downlink will be described with reference to the communication packet transmission path of the uplink.
When the
Hereinafter, for the convenience of description, the
That is, the
When the
The
That is, when the
The
As shown in FIG. 1, the
Accordingly, the
The
More specifically, the
That is, the backhaul system according to the first embodiment of the present invention utilizes the
Of course, according to the backhaul system according to the first embodiment of the present invention, the downlink communication packet transmission path which is processed inversely to the above-described communication packet transmission path of the uplink is also received at the LTE core network 20 stage. We will avoid repeated encapsulations several times.
As described above, the backhaul system according to the first embodiment of the present invention utilizes the
On the other hand, if the
Accordingly, the backhaul system of the present invention further employs a
Hereinafter, a backhaul system according to a second preferred embodiment of the present invention configured by further adopting the
At this time, for convenience of description, the communication packet transmission path of the uplink / downlink, will be described with reference to the communication packet transmission path of the uplink.
The
In this case, as described above, the at least one
Therefore, the
In the following, for convenience of description, the device will be described with reference to the
That is, the
When the
Hereinafter, for convenience of description, the first communication packet after the identification path information is inserted (encapsulated) by the
In this case, the identification path information included in the
When the
The
When the
The
At this time, if the embodiment includes the address information (IP) of the
On the other hand, if the embodiment includes a unique identifier (eg, a flag) in the identification path information that the
That is, the backhaul system according to the second embodiment of the present invention utilizes the
Of course, according to the backhaul system according to the second embodiment of the present invention, the
Here, in an embodiment of using a unique identifier (eg, a flag) to distinguish a communication packet transmission path, the
Therefore, hereinafter, the description will be made with reference to the embodiment using the address information (IP) of the device to distinguish the communication packet transmission path.
As described above, the backhaul system according to the second preferred embodiment of the present invention implements the backhaul wirelessly while using the
In this case, as shown in FIG. 1, a general LTE terminal 60 may be connected to the
Therefore, in the backhaul system of the present invention, the
Here, the method of separating and recognizing the
For example, the
Hereinafter, referring to FIG. 2, the functions and specific configurations of the
For convenience of description, it will be described with reference to the uplink communication packet transmission path (a) of the uplink communication packet transmission path (a) and the downlink communication packet transmission path (b).
In FIG. 2, the
That is, the
In addition, the
Thereafter, the
As shown in FIG. 2, the
The packet transmission /
In this case, the
Accordingly, the
For example, the
The
The
That is, the
Of course, the
Hereinafter, for convenience of description, it will be assumed that the backhaul signal of the
In this case, as shown in Fig. 2, the first communication packet received from the
More specifically, the
Hereinafter, for convenience of description, the first communication packet after inserting (encapsulating) identification path information in the first communication packet by the
At this time, the identification route information for identifying the
For example, the identification path information for identifying the
The
In other words, the
As described above, the
When the
That is, when the
In this case, in the second communication packet, the first communication packet from the
The
As shown in FIG. 2, the
In addition, according to the present invention, the
For example, the
The packet transmission /
The core function unit 120 deletes the second path information from the second communication packet of the received
As shown in FIG. 2, the core function unit 120 is a device that performs encapsulation / de-encapsulation related functions of route information in the LTE core network 20, that is, an MME 22 or an SGW ( 24) and the devices corresponding to the PGW 26, that is, the MME 122, the SGW 124, and the
In more detail, the core function unit 120, in particular, the SGW 124 sends the received second communication packet of the
The
The
At this time, the core function unit 120, in the tunneling ID (TEID), more specifically the route information (ID) of the first communication packet obtained by deleting the second path information from the second communication packet, the LTE base station ( Checking the address information (IP) of 1) and based on this it is possible to distinguish the communication packet transmission path of the LTE base station (1).
Accordingly, the LTE core network 20 deletes only the first path information from the first communication packet provided from the
Therefore, as can be seen in Figure 2, in the backhaul system according to the second embodiment of the present invention, in the uplink communication packet transmission path (a), a device (for example, LTE base station ( The same first communication packet as the backhaul signal (first communication packet) from 1)) may be transmitted from the
Of course, according to the backhaul system according to the second embodiment of the present invention, it is apparent that the downlink communication packet transmission path (b) will be processed inversely to the aforementioned uplink communication packet transmission path (a). It will be described later in Figure 5.
In conclusion, in the backhaul system according to the second embodiment of the present invention, in the downlink communication packet transmission path (b), the same as the first communication packet received from the LTE core network 20 to the
Meanwhile, in FIG. 1 and FIG. 2, one
In contrast, the backhaul system of the present invention may be implemented by cascading by adopting a plurality of
As such, the
As described above, the backhaul system according to the preferred embodiment of the present invention implements the backhaul wirelessly while using the
Hereinafter, a method of controlling a backhaul system and a method of operating a backhaul agent and a backhaul terminal according to a preferred embodiment (second embodiment of the above) will be described with reference to FIGS. 4 to 7.
Here, for the convenience of description, the configuration shown in FIGS. 1 to 3 described above will be described with reference to the corresponding reference numerals.
First, referring to FIG. 4, a control method of a backhaul system according to an exemplary embodiment of the present invention will be described with reference to a communication packet transmission path (a) of an uplink.
Referring to the
Thereafter, the
When the
When the
The
When the
In addition, the
At this time, the
In addition, the
Accordingly, in the uplink communication packet transmission path (a), the device received at the
Hereinafter, referring to FIG. 5, the control method of the backhaul system according to an exemplary embodiment of the present invention will be described based on the communication packet transmission path b of the downlink.
In this case, the
When the communication packet is received from the external network 5 (S110), more specifically in the
Here, in more detail, each equipment and
Therefore, the LTE core network 20 provides the generated back communication signal, that is, the backhaul signal of the
At this time, when the
Accordingly, the
The
When the
In addition, the
The
Accordingly, the
Accordingly, the
Accordingly, in the downlink communication packet transmission path (b), the first communication packet of the
Hereinafter, referring to FIG. 6, a method of operating a backhaul terminal (device) according to a preferred embodiment of the present invention will be described in more detail.
The method of operating the
In this case, as shown in Fig. 2, the first communication packet received from the
In more detail, the operation method of the
Hereinafter, for convenience of description, the first communication packet after inserting (encapsulating) the identification path information into the first communication packet in step S310 will be described as an 'first communication packet'.
In addition, in the method of operating the
On the other hand, the operation method of the
Accordingly, in the method of operating the
As described above, in the method of operating the
Hereinafter, referring to FIG. 7, a method of operating the backhaul agent (apparatus) according to the preferred embodiment of the present invention will be described in more detail.
In the method of operating the
In addition, in the method of operating the
At this time, the operation method of the
In addition, the operation method of the
Accordingly, in the LTE core network 20, the first communication packet provided from the
On the other hand, the operation method of the
In addition, the operation method of the
The method for operating the
As such, the method of operating the
As described above, the method for controlling the backhaul system according to the preferred embodiment of the present invention utilizes the
The control method of the backhaul system, the operation method of the backhaul agent apparatus, and the operation method of the backhaul terminal apparatus according to the embodiment of the present invention are implemented in the form of program instructions that can be executed by various computer means to be recorded on a computer readable medium Can be. The computer readable medium may include program instructions, data files, data structures, and the like, alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer readable recording media include magnetic media such as hard disks, floppy disks and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks 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 code, such as 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 device described above may be configured to operate as one or more software modules to perform the operations of the present invention, and vice versa.
Although the present invention has been described in detail with reference to preferred embodiments, the present invention is not limited to the above-described embodiments, and the technical field to which the present invention belongs without departing from the gist of the present invention as claimed in the following claims. Anyone skilled in the art will have the technical idea of the present invention to the extent that various modifications or changes are possible.
According to the control method of the backhaul system and the backhaul system according to the present invention, while implementing the backhaul between the base station and the core network in a wireless manner by using the base station apparatus of the mobile communication, the problem expected by implementing the backhaul in a wireless manner As it can be prevented, it is not only the use of related technology but the possibility of marketing or sales of the applied device as well as the use of the related technology is sufficient and practically obvious, so that the industrial availability is It is an invention.
100: backhaul agent
110: packet (transmission) receiver 120: core function
130: gateway function unit 140: interface conversion unit
200: backhaul terminal
210: packet (transmitter) receiving unit 220: interface conversion unit
230: gateway function unit 240: modem unit
Claims (16)
When receiving the second communication packet from the base station apparatus for generating a second communication packet by inserting second path information into the first communication packet received from the backhaul terminal, the second path information in the second communication packet. And a backhaul agent that deletes the identification path information and provides the first communication packet to a core network so that only the first path information is deleted from the first communication packet. Backhaul system.
In the identification route information,
And a unique identifier assigned to the device by the address information of the device or the backhaul terminal.
The backhaul agent,
And a communication packet transmission path of the device based on the address information of the device or the unique identifier in the identification path information.
And a core function unit which deletes the second path information from the second communication packet and provides the core network to the core network so that only the first path information is deleted.
In the second communication packet, before the second path information is inserted into the first communication packet, identification path information for identifying the device that generated the first communication packet is pre-inserted. Backhaul Agent Device.
In the identification route information,
And a unique identifier assigned to the device or address information of the device.
And deleting the second path information from the second communication packet by the core function unit, deleting the identification path information and providing the first communication packet to the core network. Backhaul agent.
A gateway function unit inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet; And
And a modem unit for transmitting the first communication packet into which the identification path information is inserted, to the base station apparatus.
In the identification route information,
And a unique identifier assigned to the device by the address information of the device or the backhaul terminal, which is used to distinguish a communication packet transmission path of the device.
The backhaul terminal inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet and transmitting the same to the base station apparatus;
Generating, by the base station apparatus, a second communication packet by inserting second path information into the first communication packet received from the backhaul terminal;
When the backhaul agent receives the second communication packet from the base station apparatus, the backhaul agent deletes the second path information and the identification path information from the second communication packet and provides the first communication packet to the core network. The core network control method of the backhaul system comprising the step of deleting only the first path information from the first communication packet.
And transmitting the packet to the core network after deleting the second path information from the second communication packet so that only the first path information is deleted in the core network. Way.
In the second communication packet, before the second path information is inserted into the first communication packet, identification path information for identifying the device that generated the first communication packet is pre-inserted. Operation method of backhaul agent device.
The packet transmission step,
And deleting the second path information and the identification path information from the second communication packet to provide the first communication packet to the core network.
The identification path information includes address information of the device or a unique identifier assigned to the device.
And classifying a communication packet transmission path of the device based on the address information or the unique identifier of the device in the identification path information.
A path information insertion step of inserting identification path information for identifying a device that has generated the first communication packet into the first communication packet; And
And a packet transmission step of transmitting a first communication packet into which the identification path information is inserted, to a base station apparatus.
In the identification route information,
And a unique identifier assigned to the device by the address information of the device or the backhaul terminal, which is used to distinguish a communication packet transmission path of the device.
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US20140036776A1 (en) | 2012-08-03 | 2014-02-06 | Futurewei Technologies, Inc. | System and method for mobile relay packet gateway relocation for path optimization |
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