JP6207442B2 - Base station apparatus, usage architecture determination method, and computer program - Google Patents

Description

  The present invention relates to a base station apparatus, a usage architecture determination method, and a computer program.

  A cellular network system called LTE (Long Term Evolution) standardized by a standardization organization “3GPP (3rd Generation Partnership Project)” (hereinafter referred to as LTE system) is known. FIG. 7 is a conceptual diagram illustrating a configuration example of the LTE system. In FIG. 7, the base station apparatus (E-UTRAN NodeB) eNB_m provides a cell Cell_m. Each adjacent cell Cell_m is partially overlapped. Each base station apparatus eNB_m is connected to a communication apparatus S-GW called a serving gateway. The terminal equipment (user equipment) UE is connected to one base station apparatus eNB_m. The communication device S-GW establishes a communication link with the terminal device UE via the base station device eNB_m. A communication link established by the communication device S-GW with the terminal device UE via the base station device eNB_m is referred to as a bearer here. The communication device S-GW serves as an anchor point (a point for performing communication path switching) when the terminal device UE changes the connection destination base station device eNB_m. The change of the connection destination base station device eNB_m by the terminal device UE is referred to as “hand over” or “hand off”.

  FIG. 8 is a conceptual diagram illustrating another configuration example of the LTE system. In FIG. 8, base station apparatus eNB_s is further provided with respect to the LTE system of FIG. Each base station apparatus eNB_s is connected to the communication apparatus S-GW. Each base station apparatus eNB_s provides a cell Cell_s. The cell Cell_s has narrower coverage than the cell Cell_m. The cell Cell_s is overlapped with the cell Cell_m. In the future, introduction of the LTE system in FIG. 8 is under consideration due to the use of a high frequency band and the necessity of accommodating many terminal apparatuses UE. Hereinafter, when the base station apparatus eNB_m and the base station apparatus eNB_s are not particularly distinguished, they are referred to as “base station apparatus eNB”.

  In 3GPP, when the communication device S-GW establishes a bearer with the terminal device UE via the base station device eNB, while leaving some bearers in a certain base station device eNB, An architecture for establishing a bearer with a terminal device UE via another base station device eNB has been studied (for example, see Non-Patent Document 1). 9 and 10 are conceptual diagrams showing examples of the architecture.

[Architecture 1A (see FIG. 9)]
FIG. 9 shows an architecture called “1A”. The architecture 1A is a configuration in which bearers are established between the communication device S-GW and the terminal device UE via different base station devices eNB. In FIG. 9, a bearer Br1 is established between the communication device S-GW and the terminal device UE via the base station device eNB (a). Further, a bearer Br2 is established between the communication device S-GW and the terminal device UE via the base station device eNB (b). In this architecture 1A, when viewed in units of bearers, the communication device S-GW and the base station device eNB, or between the base station device eNB and the terminal device UE can be regarded as a normal communication path. The communication device S-GW and the terminal device UE communicate with each other through different communication paths for each bearer.

[Architecture 3C (see FIG. 10)]
FIG. 10 shows an architecture called “3C”. In the architecture 3C, there is one communication path between the communication device S-GW and the base station device eNB, and one of the bearers passing through the base station device eNB is between the base station device eNB and the terminal device UE. A part of the bearers is divided into a plurality of base station apparatuses eNB, and a part of the divided bearers reaches the terminal apparatus UE via another base station apparatus eNB. In FIG. 10, a bearer Br3 passing through the base station device eNB (a) is established between the communication device S-GW and the terminal device UE. This bearer Br3 is not divided. Also, a bearer Br4 that passes through the base station device eNB (a) is established between the communication device S-GW and the terminal device UE. This bearer Br4 is divided into bearers Br4 (a) and (b) by the base station apparatus eNB (a). The bearer Br4 (a) directly reaches the terminal device UE from the base station device eNB (a). On the other hand, the bearer Br4 (b) reaches the terminal device UE from the base station device eNB (a) via the base station device eNB (b). Traffic transfer between the base station apparatuses eNB (a) and (b) is performed using a logical line called an X2 line.

  Establishing a bearer with the communication device S-GW via the plurality of base station devices eNB as in the architectures 1A and 3C described above is referred to as dual connectivity. In addition, in the state where dual connectivity is performed, a base station device eNB that leaves a bearer carrying control information is called a master base station device (MeNB (Master E-UTRAN NodeB)), and a destination to which some bearers are moved This base station apparatus eNB is called a secondary base station apparatus (SeNB (Secondary E-UTRAN NodeB)).

  In the LTE system, the base station apparatus eNB holds information related to the base station apparatus eNB adjacent to the base station apparatus eNB in order to realize handover. The list of information on the neighboring base station apparatus eNB is called a neighbor relation table. FIG. 11 is a diagram illustrating a configuration example of a conventional adjacency table NRT_old. In FIG. 11, the conventional adjacency table NRT_old includes a target cell identifier (Target Cell Identifier), a deletion prohibition flag (No Remove), and a handover prohibition flag (No HO) for each Neighbor Relation. ) And X2 no-line flag (No X2). In FIG. 11, a circle indicates that there is a corresponding flag. The deletion prohibition flag indicates that deletion of the entry of the adjacent relationship (information registered in the adjacent relationship table) is prohibited. The handover prohibition flag indicates prohibiting handover to the adjacent cell. The X2 line absence flag indicates that an X2 line is not established with the adjacent base station apparatus eNB.

3GPP, TR 36.842, “Study on Small Cell enhancements for E-UTRA and E-UTRAN; Higher layer aspects”, V12.0.0, 2013-12

  According to the above-described architectures 1A and 3C, for example, while leaving some bearers, such as bearers carrying control information, in a certain base station apparatus eNB, other bearers pass through the other base station apparatus eNB to the terminal apparatus UE. Can be established between. For example, as illustrated in FIG. 8, when a large number of base station devices eNB_s with narrow coverage are arranged, the number of handovers that occur due to movement of the terminal device UE increases, and as a result, the amount of control information that flows in the LTE system There is a concern that data traffic exchange by the terminal device UE will be compressed. As one of the countermeasures, the architectures 1A and 3C can be considered.

  However, the conventional LTE system does not consider using both architectures 1A and 3C in the same system. For example, when the supported (usable) architecture is different depending on each base station apparatus eNB, when trying to implement dual connectivity, the eNB knows which architecture is supported by each other. There is a need. However, in the conventional LTE system, a certain base station apparatus eNB cannot know the architecture supported by another base station apparatus eNB.

  Moreover, in the architecture 3C, since the bearer divided | segmented by the base station apparatus eNB can use the radio | wireless resource between the some base station apparatus eNB and the terminal device UE, the peak throughput per bearer is reduced. It can be improved. On the other hand, since a part of the traffic of the bearer that reaches a certain base station apparatus eNB reaches the terminal apparatus UE via another base station apparatus eNB, in general, the communication apparatus S-GW and the terminal apparatus UE It can be considered that the delay time between the two increases. Depending on the characteristics of each architecture, there is an issue of properly using the architecture.

  The present invention has been made in consideration of such circumstances, and a base station apparatus and a usage architecture determination method that can contribute to performing dual connectivity using a plurality of base station apparatuses that support different architectures. An object is to provide a computer program.

(1) A base station apparatus according to the present invention is a base station apparatus that relays a communication link established between a communication apparatus and a terminal apparatus. When establishing the communication link, some of the communication links are Support architecture indicating an architecture supported by its own base station apparatus among a plurality of architectures that establish other communication links with the terminal apparatus via other base station apparatuses while remaining in a certain base station apparatus The storage unit stores information and support architecture information indicating an architecture supported by another base station apparatus.
(2) The base station apparatus according to the present invention is the base station apparatus according to (1) described above, between the base station apparatus and another base station apparatus based on the support architecture information stored in the storage unit. A control unit that determines an architecture to be used is provided.
(3) The base station apparatus according to the present invention includes an adjacency table that stores support architecture information indicating an architecture supported by the other base station apparatus in the base station apparatus of (1) or (2) above. It is provided with.
(4) In the base station apparatus according to (2), the base station apparatus according to the present invention uses usage architecture information indicating an architecture used between the base station apparatus and another base station apparatus. Is stored.
(5) The base station apparatus according to the present invention is characterized in that, in the base station apparatus of (4), an adjacency table storing the use architecture information is provided.

(6) The base station apparatus according to the present invention is characterized in that, in the base station apparatus of (1), the storage unit stores communication quality information indicating communication quality of a line used in the architecture. .
(7) The base station apparatus according to the present invention is the base station apparatus according to (6) described above, based on the support architecture information and the communication quality information stored in the storage unit, and the base station apparatus and other base station apparatuses And a control unit that determines the architecture to be used between.
(8) The base station apparatus according to the present invention is the base station apparatus according to any one of (6) and (7), wherein support architecture information indicating architecture supported by the other base station apparatus and the other base station An adjacency relationship table storing the communication quality information related to the apparatus is provided.
(9) In the base station apparatus according to (7), the base station apparatus according to the present invention uses usage architecture information indicating an architecture used between the base station apparatus and another base station apparatus. Is stored.
(10) The base station apparatus according to the present invention is characterized in that, in the base station apparatus of (9), an adjacency table storing the use architecture information is provided.

(11) A usage architecture determination method according to the present invention is a usage architecture determination method of a base station device that relays a communication link established between a communication device and a terminal device, and the base station device uses the communication link. Among a plurality of architectures for establishing another communication link with the terminal device via another base station device while leaving some communication links in the base station device. Support architecture information indicating an architecture supported by the base station apparatus and support architecture information indicating an architecture supported by another base station apparatus are stored in a storage unit, and the base station apparatus is stored in the storage unit. Determine the architecture to be used between the base station device and other base station devices based on the support architecture information. To.

(12) When the computer program according to the present invention establishes the communication link to the computer of the base station device that relays the communication link established between the communication device and the terminal device, Support architecture indicating an architecture supported by its own base station apparatus among a plurality of architectures that establish other communication links with the terminal apparatus via other base station apparatuses while remaining in a certain base station apparatus Used between the own base station apparatus and other base station apparatus based on the support architecture information stored in the storage unit that stores information and support architecture information indicating the architecture supported by the other base station apparatus The computer program for executing the step of determining the architecture to be performed.

  According to the present invention, it is possible to contribute to performing dual connectivity using a plurality of base station apparatuses each supporting different architectures.

It is a block diagram which shows the structure of the base station apparatus eNB which concerns on one Embodiment of this invention. It is a figure which shows the structural example of the adjacency table NRT which concerns on 1st Embodiment of this invention. It is a flowchart which shows the procedure of the usage architecture determination method which concerns on 1st Embodiment of this invention. It is a figure which shows the structural example of the adjacency table NRT which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the procedure of the usage architecture determination method which concerns on 2nd Embodiment of this invention. It is a flowchart which shows the procedure of the usage architecture determination method which concerns on 2nd Embodiment of this invention. It is a conceptual diagram which shows the example of 1 structure of a LTE system. It is a conceptual diagram which shows the other structural example of a LTE system. It is a conceptual diagram which shows the architecture 1A. It is a conceptual diagram which shows the architecture 3C. It is a figure which shows the structural example of the conventional adjacent relationship table NRT_old.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an LTE system will be described as an example of a wireless communication system.

[First Embodiment]
First, a first embodiment will be described as an embodiment according to the present invention.
FIG. 1 is a block diagram showing a configuration of a base station apparatus eNB according to an embodiment of the present invention. In FIG. 1, the base station apparatus eNB includes a radio communication unit 11, a communication unit 12, a control unit 13, and a storage unit 14. The wireless communication unit 11, the communication unit 12, the control unit 13, and the storage unit 14 are connected so that data can be transmitted and received between them. The radio communication unit 11 performs radio communication with the terminal device UE. The communication unit 12 communicates with other devices via the backbone network. The communication unit 12 communicates with the communication device S-GW, for example. The control unit 13 controls operations related to the base station apparatus eNB. The storage unit 14 stores data.

  The storage unit 14 includes support architecture information 141 and an adjacency table NRT. The support architecture information 141 indicates the architecture supported by the own base station apparatus eNB. In the LTE system according to the present embodiment, two architectures 1A (see FIG. 9) and 3C (see FIG. 10) are used in combination. Therefore, the support architecture information 141 indicates which architecture (1A or 3C, or both 1A and 3C) of the architectures 1A and 3C is supported by the own base station apparatus eNB.

  FIG. 2 is a diagram showing a configuration example of the adjacency table NRT according to the first embodiment of the present invention. In FIG. 2, the adjacency table NRT stores a target cell ID, a deletion prohibition flag, a handover prohibition flag, an X2 no-line flag, support architecture information, and usage architecture information for each adjacency relationship. That is, in the adjacency table NRT according to the present embodiment, support architecture information and use architecture information are newly added to the conventional adjacency table NRT_old shown in FIG.

  In the adjacency table NRT in FIG. 2, the support architecture information indicates the architecture supported by the adjacency base station apparatus eNB. Specifically, the support architecture information of the adjacency table NRT indicates which architecture (1A or 3C, or both 1A and 3C) of the architecture 1A and 3C is supported by the adjoining base station apparatus eNB. Indicates.

  Further, in the adjacency table NRT, the use architecture information indicates an architecture to be used with the adjoining base station apparatus eNB when the own base station apparatus eNB becomes the MeNB. Specifically, the use architecture information of the adjacency table NRT indicates which architecture (1A) of the architectures 1A and 3C with the adjoining base station apparatus eNB when the own base station apparatus eNB becomes the MeNB. Or 3C, or both 1A and 3C).

  Based on the architecture indicated by the support architecture information 141 and the architecture indicated by the support architecture information of the adjacency table NRT as the architecture used when the own base station apparatus eNB becomes the MeNB, the control unit 13 The architecture used with the related base station apparatus eNB is uniquely determined. In the present embodiment, the control unit 13 uniquely determines the architecture that the base station apparatus eNB uses with each adjacent base station apparatus eNB. Need not be stored.

  Next, with reference to FIG. 3, the operation | movement which concerns on the use architecture determination of the control part 13 is demonstrated. FIG. 3 is a flowchart showing a procedure of a usage architecture determination method according to the first embodiment of the present invention. In FIG. 3, the own base station apparatus eNB is referred to as a base station apparatus X, and in the following description of FIG. 3, the own base station apparatus eNB is referred to as a base station apparatus X. Moreover, the target base station apparatus eNB refers to the partner base station apparatus eNB that performs dual connectivity together with the base station apparatus X.

(Step S101) The control unit 13 reads the support architecture information 141 of the base station apparatus X from the storage unit 14, and determines any one of the architectures indicated by the support architecture information 141 as a use architecture. For example, it may be determined in advance to an architecture designated by an operator.

(Step S102) The control unit 13 determines whether any of the architectures indicated by the support architecture information of the target base station apparatus eNB in the adjacency table NRT is equal to the use architecture determined in Step S101. As a result of the determination, if they are equal, the process proceeds to step S103, and if they are not equal, the process proceeds to step S104.

(Step S103) The control unit 13 sets the architecture used for dual connectivity in which the base station apparatus X is the MeNB and the target base station apparatus eNB is the SeNB as the usage architecture determined in Step S101.

(Step S104) The control unit 13 determines that dual connectivity is not performed in which the base station apparatus X is a MeNB and the target base station apparatus eNB is a SeNB.

[Second Embodiment]
Next, a second embodiment will be described as an embodiment according to the present invention. The second embodiment is a modification of the first embodiment described above. The configuration of the base station apparatus eNB is the same as that in FIG.

  FIG. 4 is a diagram showing a configuration example of the adjacency table NRT according to the second embodiment of the present invention. The adjacency table NRT shown in FIG. 4 further includes X2 line maximum transmission rate information (hereinafter referred to as X2 line maximum transmission rate information) in addition to the adjacency table NRT of FIG. 2 according to the first embodiment. Has been. The X2 line maximum transmission rate information indicates the maximum transmission rate of the X2 line established between the own base station apparatus eNB and the adjacent base station apparatus eNB. For example, in the example of FIG. 4, the X2 line maximum transmission rate information of the adjacency “1” is transmitted by the X2 line established between the base station apparatus eNB and the base station apparatus eNB of the adjacency “1”. This indicates that data transmission is possible at a maximum transmission rate of 100 Mbps.

  The control unit 13 uses the architecture indicated by the support architecture information 141, the architecture indicated by the support architecture information of the adjacency table NRT, and the adjacency table NRT as the architecture used when the base station apparatus eNB becomes the MeNB. Based on the maximum transmission rate of the X2 line indicated by the X2 line maximum transmission rate information, the architecture to be used with each adjacent base station apparatus eNB is uniquely determined. In the present embodiment, the control unit 13 uniquely determines the architecture that the base station apparatus eNB uses with each adjacent base station apparatus eNB. Need not be stored.

  Next, with reference to FIG. 5 and FIG. 6, the operation of the control unit 13 related to the use architecture determination will be described. FIG. 5 and FIG. 6 are flowcharts showing the procedure of the usage architecture determination method according to the second embodiment of the present invention. 5 and 6, the base station apparatus eNB is referred to as a base station apparatus X, and in the following description of FIGS. 5 and 6, the base station apparatus eNB is referred to as a base station apparatus X. . Moreover, the target base station apparatus eNB refers to the partner base station apparatus eNB that performs dual connectivity together with the base station apparatus X.

(Step S <b> 201) The control unit 13 reads the support architecture information 141 of the base station apparatus X from the storage unit 14.

(Step S202) The control unit 13 determines whether there are a plurality of architectures indicated by the read support architecture information 141. If there are a plurality of determination results, the process proceeds to step S203, and if there is only one, the process proceeds to step S207 in FIG.

(Step S203) The control unit 13 determines whether there are a plurality of architectures indicated by the support architecture information of the target base station apparatus eNB in the adjacency table NRT. If there are a plurality of determination results, the process proceeds to step S204, and if there is only one, the process proceeds to step S208 in FIG.

(Step S204) The control unit 13 determines whether or not the maximum transmission rate of the X2 line indicated by the X2 line maximum transmission rate information of the target base station apparatus eNB in the adjacency table NRT is equal to or greater than a predetermined threshold. As a result of the determination, if it is equal to or greater than the threshold, the process proceeds to step S205, and if it is less than the threshold, the process proceeds to step S206.

(Step S205) The control unit 13 sets architecture 3C as an architecture used for dual connectivity in which the base station apparatus X is a MeNB and the target base station apparatus eNB is a SeNB. This is because both the base station apparatus X and the target base station apparatus eNB support both architectures 1A and 3C, and the maximum transmission rate of the X2 line between the base station apparatuses is equal to or greater than a predetermined threshold. It is.

(Step S206) The architecture used for the dual connectivity in which the control unit 13 is the base station apparatus X is the MeNB and the target base station apparatus eNB is the SeNB is defined as an architecture 1A. This is because both the base station apparatus X and the target base station apparatus eNB support both architectures 1A and 3C, and the maximum transmission rate of the X2 line between these base station apparatuses is less than a predetermined threshold. It is.

(Step S207) The control unit 13 has only one of the architectures indicated by the support architecture information of the target base station apparatus eNB in the adjacency table NRT and the support architecture information 141 read from the storage unit 14 in Step S201. Determine if the architecture is equal. As a result of the determination, if they are equal, the process proceeds to step S208, and if they are not equal, the process proceeds to step S211.

(Step S208) The control unit 13 determines whether or not the architecture supported in common between the base station apparatus X and the target base station apparatus eNB is the architecture 1A. If it is determined that the architecture is 1A, the process proceeds to step S209. If it is not architecture 1A, the process proceeds to step S210.

(Step S209) The control unit 13 determines the architecture used for dual connectivity in which the base station apparatus X is a MeNB and the target base station apparatus eNB is a SeNB, and the base station apparatus X and the target base station apparatus eNB And an architecture that supports both This is because there is only one architecture that is commonly supported by the base station apparatus X and the target base station apparatus eNB, and the maximum transmission rate of the X2 line between the base station apparatuses is equal to or greater than a predetermined threshold (steps described later). (See S210).

(Step S210) The control unit 13 determines whether or not the maximum transmission rate of the X2 line indicated by the X2 line maximum transmission rate information of the target base station apparatus eNB in the adjacency table NRT is equal to or greater than a predetermined threshold. As a result of the determination, if it is equal to or greater than the threshold, the process proceeds to step S209, and if it is less than the threshold, the process proceeds to step S211.

(Step S211) The control unit 13 determines that the base station apparatus X is a MeNB and the target base station apparatus eNB does not perform dual connectivity. This is because there is no architecture that the base station apparatus X and the target base station apparatus eNB support in common, or there is only one architecture 3C that the base station apparatus X and the target base station apparatus eNB support in common. This is because the maximum transmission rate of the X2 line between these base station apparatuses is less than a predetermined threshold.

  According to the above-described embodiment, the architecture used by the base station apparatus eNB with another base station apparatus eNB can be recognized. Thereby, the effect that it can contribute to performing dual connectivity using the some base station apparatus eNB which supports each different architecture is acquired.

  Further, according to the second embodiment described above, it is possible to selectively use the architecture according to the characteristics of each architecture.

  As mentioned above, although embodiment of this invention was explained in full detail with reference to drawings, the specific structure is not restricted to this embodiment, The design change etc. of the range which does not deviate from the summary of this invention are included.

  For example, in the second embodiment described above, the transmission rate is used as information indicating the communication quality of the X2 line, but other information may be used as information indicating the communication quality of the X2 line. As information representing the communication quality of the X2 line, for example, the delay time of the X2 line can be cited. Further, as information representing the communication quality of the X2 line, for example, information representing the communication capability of the X2 line can be cited.

  In the second embodiment described above, the maximum communication quality of the X2 line is used, but other communication quality such as an average communication quality of the X2 line may be used.

  In the embodiment described above, the adjacency table NRT is used as a place where the base station apparatus eNB stores the support architecture information of another base station apparatus eNB adjacent to itself, but the adjacency table NRT is stored in the storage unit 14. The support architecture information of the other base station apparatus eNB may be stored in a different storage area.

  Moreover, in embodiment mentioned above, although the base station apparatus eNB decided uniquely the architecture used between other base station apparatuses eNB, the base station apparatus eNB uses between other base station apparatuses eNB. A plurality of possible architecture candidates may be determined. In this case, when actually implementing dual connectivity, an architecture to be used may be selected from the plurality of architecture candidates.

  In addition, the architecture candidate and the architecture to be used may be determined only once, or may be updated a plurality of times (for example, periodically).

  Moreover, although LTE system was mentioned as an example of a radio | wireless communications system in embodiment mentioned above, it is applicable similarly to other radio | wireless communications systems other than an LTE system. For example, in the above-described embodiment, the architecture 3C uses the X2 line, but another line may be used as another architecture.

Further, the computer program for realizing each step shown in FIG. 3 or each step shown in FIGS. 5 and 6 is recorded on a computer-readable recording medium, and the program recorded on the recording medium is stored in a computer system. It may be read and executed. Here, the “computer system” may include an OS and hardware such as peripheral devices.
“Computer-readable recording medium” refers to a flexible disk, a magneto-optical disk, a ROM, a writable nonvolatile memory such as a flash memory, a portable medium such as a DVD (Digital Versatile Disk), and a built-in computer system. A storage device such as a hard disk.

Further, the “computer-readable recording medium” means a volatile memory (for example, DRAM (Dynamic DRAM) in a computer system that becomes a server or a client when a program is transmitted through a network such as the Internet or a communication line such as a telephone line. Random Access Memory)), etc., which hold programs for a certain period of time.
The program may be transmitted from a computer system storing the program in a storage device or the like to another computer system via a transmission medium or by a transmission wave in the transmission medium. Here, the “transmission medium” for transmitting the program refers to a medium having a function of transmitting information, such as a network (communication network) such as the Internet or a communication line (communication line) such as a telephone line.
The program may be for realizing a part of the functions described above. Furthermore, what can implement | achieve the function mentioned above in combination with the program already recorded on the computer system, and what is called a difference file (difference program) may be sufficient.

DESCRIPTION OF SYMBOLS 11 ... Radio communication part, 12 ... Communication part, 13 ... Control part, 14 ... Memory | storage part, 141 ... Support architecture information, eNB ... Base station apparatus, NRT ... Adjacency table, S-GW ... Communication apparatus, UE ... Terminal device

Claims (3)

A base station device that relays a communication link established between a communication device and a terminal device;
Two architectures for establishing another communication link with the terminal device via another base station device while leaving some communication links in the base station device when establishing the communication link Among 1A and 3C , support architecture information indicating an architecture supported by the own base station device, support architecture information indicating an architecture supported by another base station device, and between the own base station device and another base station device a storage unit for storing a maximum transmission rate information indicating the maximum transmission rate of the line that has been established, to,
A control unit that determines an architecture to be used between the base station device and another base station device based on the support architecture information and the maximum transmission rate information stored in the storage unit ,
Architecture 1A is a configuration in which a separate communication link is established between the communication device and the terminal device via different base station devices,
In the architecture 3C, there is one communication path between the communication device and the first base station device, and the terminal is connected between the first base station device and the terminal device via the first base station device. Of the communication links leading to the device, some of the communication links are divided into a plurality by the first base station device, and the divided some communication links are routed to the terminal device via another second base station device. The structure
The control unit establishes a line established between the own base station apparatus and the other base station apparatus when both the own base station apparatus and the other base station apparatus support the architectures 1A and 3C. When the maximum transmission rate is greater than or equal to the threshold, the architecture 3C is determined as an architecture to be used between the base station apparatus and the other base station apparatus, while the base station apparatus and the other base station apparatus When the maximum transmission rate of the line established between them is less than the threshold, the architecture 1A is determined as an architecture to be used between the base station apparatus and the other base station apparatus.
Base station device. A method for determining a use architecture of a base station device that relays a communication link established between a communication device and a terminal device,
When the base station apparatus establishes the communication link, while leaving a part of the communication link in a certain base station apparatus, another communication link is communicated with the terminal apparatus via another base station apparatus. Among the two architectures 1A and 3C established in the above, support architecture information indicating the architecture supported by the own base station device, support architecture information indicating the architecture supported by the other base station device , the own base station device and the other Storing the maximum transmission rate information indicating the maximum transmission rate of the line established with the base station device in the storage unit;
A usage architecture determination method for determining an architecture to be used between the base station apparatus and another base station apparatus based on support architecture information and maximum transmission rate information stored in the storage unit by the base station apparatus Because
Architecture 1A is a configuration in which a separate communication link is established between the communication device and the terminal device via different base station devices,
In the architecture 3C, there is one communication path between the communication device and the first base station device, and the terminal is connected between the first base station device and the terminal device via the first base station device. Of the communication links leading to the device, some of the communication links are divided into a plurality by the first base station device, and the divided some communication links are routed to the terminal device via another second base station device. The structure
The base station apparatus is established between the own base station apparatus and the other base station apparatus when both the own base station apparatus and the other base station apparatus support the architectures 1A and 3C. When the maximum transmission rate of the line is equal to or higher than the threshold, the architecture 3C is determined as an architecture to be used between the own base station apparatus and the other base station apparatus, while the own base station apparatus and the other base station apparatus When the maximum transmission rate of the line established during the period is less than the threshold, the architecture 1A is determined as an architecture to be used between the base station apparatus and the other base station apparatus.
How to determine the architecture used. To the computer of the base station device that relays the communication link established between the communication device and the terminal device,
Two architectures for establishing another communication link with the terminal device via another base station device while leaving some communication links in the base station device when establishing the communication link Among 1A and 3C , support architecture information indicating an architecture supported by the own base station device, support architecture information indicating an architecture supported by another base station device, and between the own base station device and another base station device Based on the support architecture information and the maximum transmission rate information stored in the storage unit for storing the maximum transmission rate information indicating the maximum transmission rate of the line established in A computer program for executing a control step for determining an architecture to be used with a device ;
Architecture 1A is a configuration in which a separate communication link is established between the communication device and the terminal device via different base station devices,
In the architecture 3C, there is one communication path between the communication device and the first base station device, and the terminal is connected between the first base station device and the terminal device via the first base station device. Of the communication links leading to the device, some of the communication links are divided into a plurality by the first base station device, and the divided some communication links are routed to the terminal device via another second base station device. The structure
The control step includes a line established between the own base station apparatus and the other base station apparatus when both the own base station apparatus and the other base station apparatus support the architectures 1A and 3C. When the maximum transmission rate is greater than or equal to the threshold, the architecture 3C is determined as an architecture to be used between the base station apparatus and the other base station apparatus, while the base station apparatus and the other base station apparatus When the maximum transmission rate of the line established between them is less than the threshold, the architecture 1A is determined as an architecture to be used between the base station apparatus and the other base station apparatus.
Computer program.

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