JP2017017643A - Radio communication system, radio communication control device and program - Google Patents

Abstract

There has been a demand for a technique that makes it possible to construct a backhaul line more easily than in the past.
A first radio base station, a first radio communication control device connected in communication with the first radio base station, and a second radio base station and second radio communication control device connected in communication with a core network. The second radio communication control device receives data destined for the first radio communication terminal existing in the cover area of the first radio base station from the core network and exists in the cover area of the second radio base station. Encapsulated as data addressed to the second radio communication terminal that is communicably connected to the first radio base station, and the first radio communication control device uses the second radio communication terminal to encapsulate the data encapsulated by the first encapsulation unit. A wireless communication system for receiving, decapsulating, and transmitting the decapsulated data to a first wireless base station.
[Selection] Figure 2

Description

  The present invention relates to a wireless communication system, a wireless communication control device, and a program.

An FWA (Fixed Wireless Access) system has been known as a backhaul line for communication connection between a base station and a core network (see, for example, Patent Document 1).
[Prior art documents]
[Patent Literature]
[Patent Document 1] Japanese Patent Application Laid-Open No. 2014-183538

  A technique that makes it possible to construct a backhaul line more easily than before has been desired.

  According to the first aspect of the present invention, a first radio base station, a second radio base station communicatively connected to the core network, a first radio communication control device communicatively connected to the first radio base station, A second wireless communication control device communicably connected to the core network, and the second wireless communication control device transmits data addressed to the first wireless communication terminal existing in the cover area of the first wireless base station from the core network. The first data receiving unit to receive and the data addressed to the first radio communication terminal received by the first data receiving unit exist in the coverage area of the second radio base station and are connected to the first radio base station. A first encapsulating unit that encapsulates the data addressed to the second wireless communication terminal; and a second data transmitting unit that transmits the data encapsulated by the first encapsulating unit to the core network. Control device A second data receiving unit that receives data encapsulated by the first encapsulating unit using the second wireless communication terminal, and a first decapsulating unit that decapsulates the data received by the second data receiving unit; There is provided a wireless communication system including a first data transmission unit that transmits data decapsulated by the first decapsulation unit to a first radio base station.

  In the wireless communication system, the first wireless communication control device includes a third data receiving unit that receives data addressed to another communication device transmitted from the first wireless communication terminal from the first wireless base station; A second encapsulation unit that encapsulates the data addressed to the other communication device received by the third data reception unit as data addressed to the second wireless communication control device, and the second encapsulation unit encapsulates the data. The second radio communication control apparatus may further include a third data transmission unit that transmits data addressed to the second radio communication control apparatus to the second radio base station using the second radio communication terminal. Includes a fourth data reception unit that receives data transmitted by the third data transmission unit, a second decapsulation unit that decapsulates data received by the fourth data reception unit, and the second decapsulation unit. Unit may have a fourth data transmitter for transmitting decapsulated data to the core network.

  According to the second aspect of the present invention, the first radio base station, the second radio base station communicatively connected to the core network, the first radio communication control device communicatively connected to the first radio base station, And a second radio communication control device that is communicably connected to the core network, and the first radio communication control device is transmitted from the first radio communication terminal that is present in the cover area of the first radio base station. Encapsulate data addressed to the first radio base station and data addressed to the other communication device received by the first data receiver as data addressed to the second radio communication control device A first encapsulation unit; a first data transmission unit configured to transmit data addressed to the second radio communication control device encapsulated by the first encapsulation unit to a second radio base station using a second radio communication terminal; A second wireless communication control device Are decapsulated by the second data receiving unit that receives the data transmitted by the first data transmitting unit, the first decapsulating unit that decapsulates the data received by the second data receiving unit, and the first decapsulating unit There is provided a wireless communication system having a second data transmission unit that transmits the processed data to a core network.

  According to the third aspect of the present invention, the first data receiving unit that receives data addressed to the first radio communication terminal existing in the coverage area of the first radio base station from the core network, and the first data receiving unit The data addressed to the first wireless communication terminal received by the second wireless communication terminal that exists in the coverage area of the second wireless base station that is communicatively connected to the core network and that is communicatively connected to the first wireless base station. There is provided a wireless communication control device including an encapsulation unit that encapsulates data, and a first data transmission unit that transmits data encapsulated by the encapsulation unit to a core network.

  The wireless communication control device is configured to convert data received by the first wireless base station from the first wireless communication terminal into data encapsulated as data addressed to the wireless communication control device, the second wireless communication terminal, and the first A second data receiving unit received via two radio base stations, a decapsulating unit for decapsulating the data received by the second data receiving unit, and the data decapsulated by the decapsulating unit to the core network A second data transmission unit for transmission may be further included.

  According to the fourth aspect of the present invention, the data addressed to another communication device transmitted from the first radio communication terminal existing in the coverage area of the first radio base station is received from the first radio base station. An encapsulating unit that encapsulates data addressed to another communication device received by the first data receiving unit as data destined for another wireless communication control device that is communicatively connected to the core network; First data transmission for transmitting data addressed to another radio communication control apparatus encapsulated by the first radio communication terminal using a second radio communication terminal existing in a cover area of a second radio base station connected to the core network. And a wireless communication control device.

  The wireless communication control device includes: a second data receiving unit that receives, from the second wireless communication terminal, data in which data addressed to the first wireless communication terminal is encapsulated as data addressed to the second wireless communication terminal; You may further provide the decapsulation part which decapsulates the data which the 2nd data receiving part received, and the 2nd data transmission part which transmits the data decapsulated by the said decapsulation part to the said 1st radio base station.

  According to the fifth aspect of the present invention, there is provided a program for causing a computer to function as the wireless communication control device.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

1 schematically shows an example of a wireless communication system 100. 1 schematically shows an example of a wireless communication system 100. 1 schematically shows an example of a data flow by the wireless communication system 100.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 schematically illustrates an example of a wireless communication system 100. The radio communication system 100 includes a radio base station 110, a radio base station 120, a radio communication control device 210, and a radio communication control device 220.

  The radio base station 120 is communicatively connected to the core network 10. The wireless base station 120 may be communicatively connected to the core network 10 via a wired line such as an optical line. The radio base station 120 may be a radio base station compatible with LTE (Long Term Evolution) radio communication. That is, the radio base station 120 may be an eNodeB (evolved Node B). Further, the radio base station 120 may be a radio base station that supports 3G (3rd Generation) or 4G (4th Generation) radio communication.

  The radio base station 110 may be a radio base station that supports LTE radio communication. That is, the radio base station 120 may be an eNodeB. The radio base station 120 may be a radio base station that supports 3G or 4G radio communication.

  The radio base station 120 may be a so-called normal radio base station. The radio base station 110 may be a radio base station used when expanding an area that can be covered by the radio communication system 100 or increasing a communication capacity. For example, the radio base station 110 is used when it is desired to expand the communication area of an existing radio base station. Further, for example, the radio base station 110 may be used when it is desired to form an independent communication area in an area that is not covered by the communication area of the existing radio base station. The radio base station 110 may be a radio base station that is used temporarily or a radio base station that is used permanently. The radio base station 110 may be a movable radio base station, for example, a mobile radio vehicle. Further, the radio base station 110 may be a fixed radio base station.

  The radio communication system 100 according to the present embodiment constructs a backhaul line for the radio base station 110 by the radio communication control device 210, the radio communication control device 220, and the radio communication terminal 320.

  The wireless communication control device 220 is communicatively connected to the core network 10. The wireless communication control device 220 may be communicatively connected to the core network 10 via a wired line. Note that the wireless communication control device 210 may wirelessly communicate with the core network 10.

  The wireless communication control device 210 is connected to the wireless base station 110 for communication. The wireless communication control device 210 may be communicatively connected to the wireless base station 110 via a wired line. Note that the radio communication control apparatus 210 may perform radio communication with the radio base station 110.

  The wireless communication terminal 320 is communicatively connected to the wireless communication control device 210. The wireless communication terminal 320 may be communicatively connected to the wireless communication control device 210 via a wired line. Further, the wireless communication terminal 320 exists in the cover area 122 of the wireless base station 120 and establishes a wireless communication connection with the wireless base station 120.

  Data transmitted from the core network 10 side to the radio communication terminal 322 is transmitted from the core network 10 to the radio base station 120, and the radio base station 120 transmits data to the radio communication terminal 322 via the radio communication connection. To do.

  Data transmitted from the core network 10 to the radio communication terminal 310 that exists in the cover area 112 of the radio base station 110 and has established a radio communication connection with the radio base station 110 is first transmitted from the core network 10. It is transmitted to the wireless communication control device 220. The wireless communication control device 220 encapsulates the received data as data addressed to the wireless communication terminal 320. Then, the radio communication control apparatus 220 transmits the encapsulated data to the radio base station 120 via the core network 10. The radio base station 120 transmits the encapsulated data to the radio communication terminal 320 via the radio communication connection according to the destination of the encapsulated data.

  The wireless communication terminal 320 transmits the received encapsulated data to the wireless communication control device 210. The wireless communication control device 210 decapsulates the received encapsulated data. Then, the radio communication control apparatus 210 transmits the decapsulated data to the radio base station 110. The radio base station 110 transmits data to the radio communication terminal 310 via the radio communication connection according to the data destination.

  On the other hand, when data addressed to another communication device communicably connected to the core network 10 is transmitted from the wireless communication terminal 310 to the wireless base station 110, the wireless base station 110 transmits the received data to the wireless communication control device. To 210. The other communication device that is communication-connected to the core network 10 may be a communication device that is directly connected to the core network 10 or may be a communication device that is indirectly connected to the core network 10. . The communication device indirectly connected to the core network 10 may be a communication device connected to the core network 10 via another network, for example, a communication device connected to the Internet. Good. The communication device may be any device having a communication function. The wireless communication control device 210 encapsulates the received data as data addressed to the wireless communication control device 220. Then, the radio communication control apparatus 210 transmits the encapsulated data to the radio base station 120 using the radio communication terminal 320.

  The radio base station 120 transmits the received encapsulated data to the radio communication control device 220 via the core network 10. The wireless communication control device 220 decapsulates the received encapsulated data. Then, the wireless communication control device 220 transmits the decapsulated data to the core network 10.

  As described above, the radio communication system 100 according to the present embodiment constructs a backhaul line for the radio base station 110 by the radio communication control device 220, the radio communication terminal 320, and the radio communication control device 210. When a backhaul line is constructed using FWA as in the prior art, the installation of a base station is not easy and movement after installation is difficult because accurate directivity is required. It is also limited to use within the line of sight. In addition, when a new optical line is laid, since construction is required for opening, the necessary cost and time are increased, and there is a limit to the place where the laying can be performed. On the other hand, according to the wireless communication system 100 according to the present embodiment, if the wireless communication terminal 320 is arranged in the cover area 122, a backhaul line can be constructed, so that installation is easy, The degree of freedom of installation location is also high. In addition, a backhaul line can be easily provided to a plurality of radio base stations.

  Note that each of the wireless communication control device 210 and the wireless communication control device 220 may be a router device. The wireless communication terminal 310, the wireless communication terminal 322, and the wireless communication terminal 320 may be any terminals that can establish a wireless communication connection with the wireless base station 110 and the wireless base station 120, respectively. For example, the wireless communication terminal 310, the wireless communication terminal 322, and the wireless communication terminal 320 are mobile phones such as smartphones. The wireless communication terminal 310, the wireless communication terminal 322, and the wireless communication terminal 320 may be a tablet terminal and a PC (Personal Computer).

  FIG. 2 schematically illustrates an example of the wireless communication system 100. FIG. 2 schematically shows functional configurations of the wireless communication control device 220 and the wireless communication control device 210.

  The wireless communication control device 220 includes a data reception unit 221, an encapsulation unit 222, a data transmission unit 223, a data reception unit 226, a decapsulation unit 227, and a data transmission unit 228. The wireless communication control apparatus 210 includes a data reception unit 211, a decapsulation unit 212, a data transmission unit 213, a data reception unit 216, an encapsulation unit 217, and a data transmission unit 218. The core network 10 includes a switch 12 and an EPC (Evolved Packet Core) 14. The switch 12 may be an L3 switch. The switch 12 only needs to be able to execute data transfer, and may be a router or the like.

  The data receiving unit 221 receives data addressed to the wireless communication terminal 310 from the EPC 14. When the EPC 14 receives data addressed to the wireless communication terminal 310 from the switch 12, the EPC 14 may transmit the data to the wireless communication control device 220. When the EPC 14 receives data addressed to the radio communication terminal 322, the EPC 14 may transmit the data to the radio base station 120.

  The encapsulation unit 222 encapsulates the data received by the data reception unit 221 as data addressed to the wireless communication terminal 320. The data transmission unit 223 transmits the encapsulated data encapsulated by the encapsulation unit 222 to the EPC 14. The data transmission unit 223 may transmit the encapsulated data to the EPC 14 via the switch 12.

  The EPC 14 transmits the encapsulated data to the radio base station 120 with which the radio communication terminal 320 has established a radio communication connection in accordance with the destination of the encapsulated data. The radio base station 120 transmits the received encapsulated data to the radio communication terminal 320 via the radio communication connection. The wireless communication terminal 320 transmits the received encapsulated data to the wireless communication control device 210.

  The data receiving unit 211 receives the encapsulated data transmitted from the wireless communication terminal 320. The decapsulation unit 212 decapsulates the encapsulated data received by the data reception unit 211. The data transmission unit 213 transmits the data according to the destination of the data decapsulated by the decapsulation unit 212 to the radio base station 110 with which the radio communication terminal 310 has established a radio communication connection. Then, the wireless base station 110 transmits the data to the wireless communication terminal 310 via the wireless communication connection.

  The data receiving unit 216 receives from the radio base station 110 data addressed to other communication devices connected to the core network 10 and transmitted to the radio base station 110 by the radio communication terminal 310. The encapsulation unit 217 encapsulates the data received by the data reception unit 216 as data addressed to the wireless communication control device 220. The data transmission unit 218 transmits the encapsulated data encapsulated by the encapsulation unit 217 to the radio base station 120 using the radio communication terminal 320. The radio base station 120 transmits the received encapsulated data to the EPC 14.

  The data receiving unit 226 receives the encapsulated data encapsulated by the encapsulating unit 217 from the EPC 14. The data receiving unit 226 may receive the encapsulated data via the switch 12. The decapsulation unit 227 decapsulates the encapsulated data received by the data reception unit 226. The data transmission unit 228 transmits the data to the core network 10 according to the destination of the data decapsulated by the decapsulation unit 227. The data transmission unit 228 may transmit the decapsulated data to the EPC 14.

  As described above, the wireless communication control device 220 is arranged between the switch 12 and the EPC 14, the data addressed to the wireless communication terminal 310 received from the EPC 14 is encapsulated and returned to the EPC 14 via the switch 12, and the switch 12, the EPC corresponding to the radio base station 110 and the EPC corresponding to the radio base station 120 are adopted by adopting a structure in which the encapsulated data addressed to the core network 10 received from 12 is decapsulated and transmitted to the EPC 14. It is possible to support both the radio base station 110 and the radio base station 120 by one EPC 14 without using the two EPCs.

  FIG. 3 schematically shows an example of a data flow by the wireless communication system 100. 3, the wireless communication terminal 310 has established a wireless communication connection with the wireless base station 110 and the location registration has been completed, and the wireless communication terminal 320 and the wireless communication terminal 322 have wireless communication with the wireless base station 120. A state where connection is established and location registration is completed will be described as a start state.

  In step 302 (step may be abbreviated as S), the EPC 14 that has received the data addressed to the wireless communication terminal 322 transmits the data to the wireless base station 120. In S304, the radio base station 120 transmits the data received in S302 to the radio communication terminal 322 via the radio communication connection.

  In S <b> 306, the EPC 14 that has received the data addressed to the wireless communication terminal 310 transmits the data to the wireless communication control device 220. In S <b> 308, the wireless communication control device 220 transmits to the EPC 14 encapsulated data in which the data received in S <b> 306 is encapsulated as data addressed to the wireless communication terminal 320.

  In S310, the EPC 14 transmits the encapsulated data received in S308 to the radio base station 120. In S312, the radio base station 120 transmits the encapsulated data received in S310 to the radio communication terminal 320 via a radio communication connection. In S <b> 314, the wireless communication terminal 320 transmits the encapsulated data received in S <b> 312 to the wireless communication control device 210.

  In S316, the radio communication control apparatus 210 transmits data obtained by decapsulating the encapsulated data received in S314 to the radio base station 110. In S318, the radio base station 110 transmits the data received in S316 to the radio communication terminal 310 via the radio communication connection.

  In S320, the wireless communication terminal 310 transmits data addressed to another communication device connected to the core network 10 to the wireless base station 110 via the wireless communication connection. In S322, the radio base station 110 transmits the data received in S320 to the radio communication control apparatus 210.

  In S324, the wireless communication control device 210 transmits to the wireless communication terminal 320 encapsulated data in which the data received in S322 is encapsulated as data addressed to the wireless communication control device 220. In S326, the wireless communication terminal 320 transmits the encapsulated data received in S324 to the wireless base station 120 via the wireless communication connection.

  In S328, the radio base station 120 transmits the encapsulated data received in S326 to the EPC 14. In S330, the EPC 14 transmits the encapsulated data received in S328 to the wireless communication control device 220. In S <b> 332, the wireless communication control device 220 transmits data obtained by decapsulating the encapsulated data received in S <b> 330 to the EPC 14.

  By realizing the data flow described above, a backhaul line for the radio base station 110 can be constructed using the existing radio base station 120.

  In the above embodiment, the case where the radio communication control apparatus 210 is separate from the radio base station 110 has been described as an example. However, the present invention is not limited to this. The radio base station 110 may include a radio communication control device 210.

  In the above description, each unit of the wireless communication control device 210 and the wireless communication control device 220 may be realized by hardware or may be realized by software. Further, it may be realized by a combination of hardware and software. Further, the computer may function as the wireless communication control device 210 or the wireless communication control device 220 by executing the program. The program may be installed in a computer constituting at least a part of the wireless communication control device 210 or the wireless communication control device 220 from a computer-readable medium or a storage device connected to a network.

  A program that is installed in a computer and causes the computer to function as the wireless communication control device 210 or the wireless communication control device 220 according to the present embodiment works on a CPU or the like to cause the computer to operate the wireless communication control device 210 or the wireless communication control device 220. It functions as each part. Information processing described in these programs functions as a specific means in which software and hardware resources of the wireless communication control device 210 or the wireless communication control device 220 cooperate by being read by a computer.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that it can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first,” “next,” etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

10 core network, 12 switch, 14 EPC, 100 wireless communication system, 110 wireless base station, 112 cover area, 120 wireless base station, 122 cover area, 210 wireless communication control device, 211 data receiving unit, 212 decapsulation unit, 213 Data transmission unit, 216 data reception unit, 217 encapsulation unit, 218 data transmission unit, 220 wireless communication control device, 221 data reception unit, 222 encapsulation unit, 223 data transmission unit, 226 data reception unit, 227 decapsulation unit, 228 Data transmission unit, 310 wireless communication terminal, 320 wireless communication terminal, 322 wireless communication terminal

Claims (8)

A first radio base station;
A second radio base station communicatively connected to the core network;
A first radio communication control device communicably connected to the first radio base station;
A second wireless communication control device communicably connected to the core network,
The second wireless communication control device includes:
A first data receiving unit for receiving, from the core network, data addressed to a first wireless communication terminal existing in a coverage area of the first wireless base station;
A second radio communication terminal that is within the cover area of the second radio base station and is communicatively connected to the first radio base station for data addressed to the first radio communication terminal received by the first data receiver A first encapsulating unit that encapsulates the addressed data;
A second data transmission unit for transmitting the data encapsulated by the first encapsulation unit to the core network,
The first wireless communication control device
A second data receiving unit that receives the data encapsulated by the first encapsulating unit using the second wireless communication terminal;
A first decapsulator for decapsulating data received by the second data receiver;
A wireless communication system, comprising: a first data transmission unit that transmits data decapsulated by the first decapsulation unit to the first radio base station. The first wireless communication control device
A third data receiving unit for receiving, from the first radio base station, data addressed to another communication device transmitted from the first radio communication terminal;
A second encapsulation unit that encapsulates the data addressed to the other communication device received by the third data receiving unit as data addressed to the second wireless communication control device;
A third data transmission unit configured to transmit data addressed to the second radio communication control device encapsulated by the second encapsulation unit to the second radio base station using the second radio communication terminal; ,
The second wireless communication control device includes:
A fourth data receiving unit for receiving data transmitted by the third data transmitting unit;
A second decapsulator for decapsulating data received by the fourth data receiver;
The wireless communication system according to claim 1, further comprising: a fourth data transmission unit configured to transmit data decapsulated by the second decapsulation unit to the core network. A first radio base station;
A second radio base station communicatively connected to the core network;
A first radio communication control device communicably connected to the first radio base station;
A second wireless communication control device communicably connected to the core network,
The first wireless communication control device
A first data receiving unit for receiving, from the first radio base station, data addressed to another communication device transmitted from the first radio communication terminal existing within the coverage area of the first radio base station;
A first encapsulation unit that encapsulates data addressed to the other communication device received by the first data receiving unit as data addressed to the second wireless communication control device;
Second data encapsulated by the first encapsulating unit and addressed to the second radio communication control apparatus is present in a coverage area of the second radio base station and is communicatively connected to the first radio base station. A first data transmission unit for transmitting to the second radio base station using a radio communication terminal,
The second wireless communication control device includes:
A second data receiving unit for receiving data transmitted by the first data transmitting unit;
A first decapsulator for decapsulating data received by the second data receiver;
A wireless communication system, comprising: a second data transmission unit configured to transmit data decapsulated by the first decapsulation unit to the core network. A first data receiving unit that receives data addressed to a first wireless communication terminal existing in the coverage area of the first wireless base station from the core network;
The data addressed to the first wireless communication terminal received by the first data receiving unit exists in the coverage area of the second wireless base station connected to the core network and is connected to the first wireless base station. An encapsulation unit that encapsulates the data addressed to the second wireless communication terminal,
A wireless communication control device comprising: a first data transmission unit configured to transmit data encapsulated by the encapsulation unit to the core network. Data obtained by encapsulating data received by the first radio base station from the first radio communication terminal as data addressed to the radio communication control device is transmitted via the second radio communication terminal and the second radio base station. A second data receiving unit for receiving;
A decapsulation unit that decapsulates data received by the second data reception unit;
The wireless communication control device according to claim 4, further comprising: a second data transmission unit that transmits data decapsulated by the decapsulation unit to the core network. A first data receiving unit for receiving, from the first radio base station, data addressed to another communication device transmitted from the first radio communication terminal existing within the coverage area of the first radio base station;
An encapsulation unit that encapsulates data addressed to the other communication device received by the first data receiving unit as data addressed to another wireless communication control device that is communicatively connected to a core network;
The data addressed to the other radio communication control apparatus encapsulated by the encapsulating unit is transmitted using the second radio communication terminal existing in the cover area of the second radio base station that is communicatively connected to the core network. A wireless communication control device comprising: a first data transmission unit. A second data receiving unit for receiving, from the second wireless communication terminal, data in which data addressed to the first wireless communication terminal is encapsulated as data addressed to the second wireless communication terminal;
A decapsulation unit that decapsulates data received by the second data reception unit;
The radio communication control device according to claim 6, further comprising: a second data transmission unit configured to transmit data decapsulated by the decapsulation unit to the first radio base station.   The program for functioning a computer as a radio | wireless communication control apparatus as described in any one of Claims 4-7.

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