Connection restrictions for mobile stations

Abstract

This communication control device related to a mobile station, which moves and is capable of communicating with a communication device, comprises at least one processor that identifies, by a communication cell identification unit, a communication cell through which the mobile station passes, and that restricts, by a connection restriction unit, the connection between the mobile station and a communication device not moving with the mobile station in the communication cell. The mobile station comprises a communication device function unit that functions as a communication device for a base station, and a base station function unit that functions as a base station for a communication device with which the mobile station can communicate. The mobile station is an integrated access and backhaul (IAB) node, the communication device function unit is a mobile termination (MT), and the base station function unit is a distributed unit (DU) (FIG. 2).

Description

[[Technical Field]]

[0001] The present disclosure relates to communication control technology in wireless communication systems. [[Background Art]]

[0002] The number, types, and applications of wireless communication devices represented by smartphones and IoT (Internet of Things) devices have been continuously increasing, and the expansion and improvement of wireless communication standards have been ongoing. For example, commercial service of the 5th generation mobile communication system, known as "5G", started in 2018, and standardization is still being progressed in 3GPP (Third Generation Partnership Project). In addition, efforts toward standardization of "6G", or the 6th generation mobile communication system, as the next-generation wireless communication standard succeeding 5G have also begun.

[0003] Mobile communication (hereinafter also referred to as cellular communication) networks for mobile communication devices such as smartphones and mobile phones (hereinafter collectively referred to as communication devices) have generally been constructed by communication cells (hereinafter also referred to as terrestrial communication cells or fixed communication cells) provided by base stations fixedly installed on the ground (hereinafter also referred to as terrestrial base stations or fixed base stations). However, there has been a problem that mobile communication cannot be performed outside fixed communication cells, and even within fixed communication cells, the quality of mobile communication may deteriorate depending on time and location.

[0004] In order to solve such problems, studies have been conducted on mobile stations that compensate for fixed communication cells provided by fixed base stations. As movable mobile stations, those such as communication satellites that themselves function as base stations (hereinafter also referred to as mobile base stations), and those such as repeaters that communicate with existing fixed base stations to expand existing fixed communication cells (hereinafter also referred to as relay stations) are envisioned. [[Prior Art Literature]] [[Patent Literature]]

[0005] [Patent Document 1] Japanese Patent Publication No. 2006-352894 [Overview of the Initiative] [Problems that the invention aims to solve]

[0006] The inventors of this invention have independently recognized a problem that arises when a mobile station passes through other communication cells, such as fixed communication cells. Specifically, when a mobile station passes near a communication device that was connected to the other communication cell, there is a possibility that the communication device may be temporarily connected to the mobile station. However, after the mobile station has passed, the communication device must immediately reconnect to its original communication cell. As a result, resources in communication devices, base stations such as fixed base stations, and mobile stations are wasted.

[0007] This disclosure is made in light of these circumstances and aims to provide a communication control device, etc., that can improve the efficiency of communication control related to mobile stations. [Means for solving the problem]

[0008] To solve the above problems, a communication control device in one aspect of the present disclosure is a communication control device relating to a mobile station that can communicate with a communication device, and comprises at least one processor that performs the following: a communication cell identification unit identifies a communication cell through which the mobile station passes, and a connection restriction unit restricts the connection between the mobile station and a communication device that does not move with the mobile station within the communication cell.

[0009] In this configuration, connections between communication devices that do not move with the mobile station and the mobile station are restricted. Even if such communication devices are temporarily connected to the mobile station, the connection will be disconnected quickly as the mobile station moves away. By restricting the connection in the first place, it is possible to reduce the wasted consumption of resources at the communication devices, the base station providing the communication cells that the mobile station passes through, and the mobile station.

[0010] Another aspect of the present disclosure is also a communication control device. This device is a communication control device relating to a mobile station capable of communicating with a communication device, and comprises at least one processor that performs, by a connection limiting unit, excluding a mobile communication cell used by the mobile station from the candidates for handover of the communication device from a communication cell through which the mobile station passes.

[0011] Another aspect of the present disclosure is a communication control method. This method relates to a mobile station that can communicate with a communication device, and includes identifying a communication cell through which the mobile station passes, and restricting connections between the mobile station and a communication device that does not move with the mobile station within the communication cell.

[0012] Another aspect of this disclosure is a storage medium, which stores a communication control program relating to a mobile station capable of communicating with a communication device, which causes a computer to perform the following actions: identify the communication cells through which the mobile station passes, and restrict the connection between the mobile station and a communication device that does not move with the mobile station within the communication cells.

[0013] Furthermore, any combination of the above components, as well as any representations thereof converted into methods, apparatus, systems, recording media, computer programs, etc., are also included in this disclosure. [Effects of the Invention]

[0014] According to this disclosure, communication control related to mobile stations can be made more efficient. [Brief explanation of the drawing]

[0015] [Figure 1] A schematic diagram illustrates the wireless communication system to which a communication control device is applied. [Figure 2] This is a functional block diagram of the communication control device. [Modes for carrying out the invention]

[0016] Figure 1 schematically shows an overview of a wireless communication system 1 to which a communication control device according to an embodiment of this disclosure is applied. The wireless communication system 1 includes a 5G wireless communication system 11 that conforms to the fifth-generation mobile communication system (5G) and uses NR (New Radio) or 5G NR (Fifth Generation New Radio) as the radio access technology (RAT) and 5GC (Fifth Generation Core) as the core network (CN), a 4G wireless communication system 12 that conforms to the fourth-generation mobile communication system (4G) and uses LTE (Long Term Evolution) or LTE-Advanced as the radio access technology and EPC (Evolved Packet Core) as the core network, and a satellite communication system 13 that handles satellite communication via a communication satellite 131. Although not shown in the figures, the wireless communication system 1 may include wireless communication systems of generations prior to 4G, wireless communication systems of generations later than 5G (such as 6G), or any wireless communication system that is not related to a generation, such as Wi-Fi®.

[0017] The 5G wireless communication system 11 includes multiple 5G base stations 111A, 111B, and 111C (hereinafter sometimes collectively referred to as 5G base stations 111) that can communicate via 5G NR with communication devices such as smartphones 2A, 2B, 2C, and 2D (hereinafter sometimes collectively referred to as communication devices 2), which are installed on the ground and also called UE (User Equipment). In 5G, base stations 111 are also called gNodeB (gNB). The communication range or supported range of each 5G base station 111A, 111B, and 111C is called a cell and is illustrated as 112A, 112B, and 112C (hereinafter sometimes collectively referred to as 5G cells 112).

[0018] The size of the 5G cells 112 of each 5G base station 111 is arbitrary, but typically ranges from a few meters to tens of kilometers in radius. Although there is no established definition, cells with a radius of a few meters to 10 meters are sometimes called femtocells, cells with a radius of 10 meters to tens of meters are called picocells, cells with a radius of tens to hundreds of meters are called microcells, and cells with a radius exceeding hundreds of meters are sometimes called macrocells. 5G often uses high-frequency radio waves such as millimeter waves, and due to their high directivity, radio waves are blocked by obstacles, shortening the communication range. For this reason, 5G tends to use smaller cells more frequently than generations prior to 4G.

[0019] Communication device 2 can perform 5G communication if it is located inside at least one of the multiple 5G cells 112A, 112B, and 112C. In the illustrated example, communication device 2B located inside 5G cells 112A and 112B can communicate with either 5G base station 111A or 111B via 5G NR. Similarly, communication device 2C located inside 5G cell 112C can communicate with 5G base station 111C via 5G NR. Communication devices 2A and 2D are outside all 5G cells 112A, 112B, and 112C and are therefore unable to communicate via 5G NR. 5G NR communication between each communication device 2 and each 5G base station 111 is managed by the core network, 5GC. For example, 5GC handles data exchange with each 5G base station 111, data exchange with external networks such as EPC, satellite communication system 13, and the internet, and manages the movement of communication device 2.

[0020] The 4G wireless communication system 12 includes multiple 4G base stations 121 (only one is shown in Figure 1) installed on the ground and capable of communicating with the communication device 2 via LTE or LTE-Advanced. In 4G, base stations 121 are also called eNodeB (eNB). Similar to each 5G base station 111, the communication range or support range of each 4G base station 121 is also called a cell and is illustrated as 122.

[0021] The communication device 2 can perform 4G communication if it is located inside a 4G cell 122. In the illustrated example, the communication devices 2A and 2B located within the 4G cell 122 can communicate with the 4G base station 121 via LTE or LTE-Advanced. Since the communication devices 2C and 2D are located outside the 4G cell 122, they are in a state where communication via LTE or LTE-Advanced cannot be performed. 4G communication via LTE or LTE-Advanced between each communication device 2 and each 4G base station 121 is managed by the EPC, which is a core network. For example, the EPC performs transmission and reception of data with each 4G base station 121, transmission and reception of data with external networks such as 5GC, the satellite communication system 13 and the Internet, and mobility management of the communication device 2.

[0022] Focusing on each of the communication devices 2A, 2B, 2C, and 2D, in the illustrated example, the communication device 2A is in a state where 4G communication with the 4G base station 121 is possible, the communication device 2B is in a state where 5G communication with 5G base stations 111A and 111B and 4G communication with the 4G base station 121 are possible, and the communication device 2C is in a state where 5G communication with the 5G base station 111C is possible. When there are a plurality of communicable base stations (111A, 111B, 121) like the communication device 2B, under the management of 5GC and / or EPC which are core networks, one base station determined to be optimal from the viewpoint of communication quality or the like is selected to perform communication with the communication device 2B. In addition, since the communication device 2D is not in a state where it can communicate with any of the 5G base stations 111 and 4G base stations 121, it performs communication via the satellite communication system 13 described below.

[0023] The satellite communication system 13 is a radio communication system that uses a communication satellite 131, which is a low-earth orbit satellite flying in low-earth orbit space at an altitude of approximately 500 km to 700 km from the earth's surface, as a non-terrestrial base station. Similar to the 5G base station 111 and the 4G base station 121, the communicable range or coverage area of the communication satellite 131 is also called a cell, and is illustrated as 132. In this way, the communication satellite 131 as a non-terrestrial base station provides the satellite communication cell 132 as a non-terrestrial communication cell to the ground. If the terrestrial communication device 2 is located inside the satellite communication cell 132, it can perform satellite communication. Similar to the 5G base station 111 in the 5G radio communication system 11 and the 4G base station 121 in the 4G radio communication system 12, the communication satellite 131 as a base station in the satellite communication system 13 can perform radio communication with the communication device 2 in the satellite communication cell 132 directly or indirectly via an aircraft or the like. The radio access technology used by the communication satellite 131 for radio communication with the communication device 2 in the satellite communication cell 132 may be 5G NR, which is the same as that of the 5G base station 111, may be LTE or LTE-Advanced, which is the same as that of the 4G base station 121, or may be any other radio access technology available to the communication device 2. Therefore, the communication device 2 does not need to be provided with special functions or components for satellite communication.

[0024] The satellite communication system 13 includes a gateway 133, which is installed on the ground and serves as a ground station capable of communicating with the communication satellite 131. The gateway 133 is equipped with a satellite antenna for communicating with the communication satellite 131 and is connected to 5G base stations 111 and 4G base stations 121, which constitute the terrestrial network (TN). In this way, the gateway 133 connects the non-terrestrial network (NTN), which is composed of non-terrestrial base stations or the communication satellite 131 as a satellite base station, and the TN, which is composed of ground base stations 111 and 121, in a manner that enables mutual communication. When communication satellite 131 communicates with communication device 2 in satellite communication cell 132 via 5G NR, the 5GC connected via gateway 133 and 5G base station 111 (or 5G radio access network) in TN is used as the core network. When communication satellite 131 communicates with communication device 2 in satellite communication cell 132 via LTE or LTE-Advanced, the EPC connected via gateway 133 and 4G base station 121 (or 4G radio access network) in TN is used as the core network. In this way, appropriate coordination is achieved between different wireless communication systems such as 5G communication, 4G communication, and satellite communication via gateway 133.

[0025] Satellite communication via the communications satellite 131 is primarily used to cover areas where ground base stations such as 5G base stations 111 and 4G base stations 121 are not installed or are few in number. In the illustrated example, the communication device 2D, which is outside the communication cells of all ground base stations, communicates with the communications satellite 131. On the other hand, communication devices 2A, 2B, and 2C, which are in good communication with any of the ground base stations, are also able to communicate with the communications satellite 131 because they are inside the satellite communication cell 132. However, in principle, they communicate with the ground base stations rather than the communications satellite 131, which is acting as a satellite base station, thereby saving the limited communication resources (including power) of the communications satellite 131 for the communication devices 2D and others. The communications satellite 131 improves the communication quality with the communication devices 2D by directing the communication radio waves towards the communication devices 2D inside the satellite communication cell 132 using beamforming.

[0026] The size of the satellite communication cell 132 of the communication satellite 131 as a satellite base station can be arbitrarily set according to the number of beams emitted by the communication satellite 131. For example, by combining up to 2,800 beams, a satellite communication cell 132 with a diameter of approximately 24 km can be formed. As shown in the figure, the satellite communication cell 132 is typically larger than terrestrial communication cells such as 5G cells 112 and 4G cells 122, and may contain one or more 5G cells 112 and / or 4G cells 122 inside. In the above, the communication satellite 131 flying in low Earth orbit at an altitude of approximately 500 km to 700 km above the Earth's surface was used as an example of a non-terrestrial base station in flight. However, communication satellites flying in higher Earth orbits such as geostationary orbit, or unmanned or manned aircraft flying in the atmosphere at a lower altitude (e.g., approximately 20 km above the Earth's surface), may be used as non-terrestrial base stations in addition to or instead of the communication satellite 131.

[0027] As shown in Figure 1, wireless communication system 1 was generally constructed using ground communication cells 112 and 122 (hereinafter also referred to as fixed communication cells FC) provided by ground base stations 111 and 121 (hereinafter also referred to as fixed base stations FS) that were permanently installed on the ground. However, there was a problem that mobile communication was not possible outside of fixed communication cells FC, and even within fixed communication cells FC, the quality of mobile communication deteriorated depending on the time and location. Although wireless communication system 1 may also include satellite communication system 13 using a communication satellite 131 as a non-ground base station or mobile base station, it is impractical to supplement the ground network provided by ground base stations 111 and 121 with only the communication satellite 131.

[0028] To solve these problems, it is preferable to introduce a mobile station MS to supplement the fixed communication cell FC provided by the fixed base station FS, as schematically shown in Figure 2. Examples of mobile stations MS include a mobile base station such as the communications satellite 131, which functions as a base station itself, and a repeater (hereinafter also referred to as a repeater station) that communicates with an existing fixed base station FS to extend the existing fixed communication cell FC. In the example in Figure 2, the mobile station MS is an IAB (Integrated Access and Backhaul) node.

[0029] IAB is a technology developed for 5G that uses wireless backhaul between a base station acting as an IAB donor (parent node) and IAB nodes (child nodes), and / or between parent and child IAB nodes (the IAB node closer to the IAB donor becomes the parent node, and the IAB node further away from the IAB donor becomes the child node) to extend the communication cell by the parent node. Here, "extending the communication cell" includes not only expanding the area covered by existing communication cells, but also improving the communication quality of at least some of the existing communication cells. Furthermore, "extending the area covered by communication cells" includes not only increasing the horizontal area of ​​existing communication cells, but also extending existing communication cells vertically, for example, underground or on upper and / or lower floors of buildings.

[0030] In Figure 2, the mobile station MS as an IAB node comprises a communication device function unit 41 that functions as a communication device for parent nodes including a fixed base station FS, and a base station function unit 42 that functions as a base station for communication devices 2 that the mobile station MS can communicate with. In 5G, the communication device function unit 41 is defined as MT (Mobile Termination) or IAB-MT, and the base station function unit 42 is defined as DU (Distributed Unit) or IAB-DU. It is also conceivable that similar functions to IAB, MT, DU, and CU may be provided under different names in other wireless communication systems, including the CU (Central Unit) described later, but in this embodiment, such similar functions may be used as IAB, MT, DU, and CU.

[0031] Figure 2 illustrates two fixed base stations FS1 and FS2. The first fixed base station FS1 provides the first fixed communication cell FC1, and the second fixed base station FS2 provides the second fixed communication cell FC2. In the example in Figure 2, the baseband functions of each fixed base station FS1 and FS2 are divided into an aggregation unit (CU) on the core network CN side and a distribution unit (DU) on the communication device 2 side. The first distribution unit DU1 of the first fixed base station FS1 is located near the radio equipment such as the antenna of the first fixed base station FS1, typically in the same base station facility as the radio equipment. The second distribution unit DU2 of the second fixed base station FS2 is located near the radio equipment such as the antenna of the second fixed base station FS2, typically in the same base station facility as the radio equipment. In the illustrated example, the aggregation unit CU is shared by the first fixed base station FS1 (first distribution unit DU1) and the second fixed base station FS2 (second distribution unit DU2), but an aggregation unit may be provided individually for each fixed base station FS1 and FS2. The aggregation unit CU is connected to the core network CN. The connections between the wireless equipment such as antennas at each fixed base station FS1 and FS2 and each distributed unit DU1 and DU2, the connections between each distributed unit DU1 and DU2 and the aggregation unit CU, and the connections between the aggregation unit CU and the core network CN are typically made by wires such as conductors or optical fibers, but some or all of these connections may be made wirelessly.

[0032] The communication unit 41 (IAB-MT) of the mobile station MS can wirelessly connect to the distributed unit DU of any fixed base station FS, depending on the location of the mobile station MS. In the example in Figure 2, the communication unit 41 is wirelessly connected to the second distributed unit DU2 of the second fixed base station FS2. In this case, the mobile station MS functions as a child node with the second fixed base station FS2 as the parent node or IAB donor, and extends the second fixed communication cell FC2 provided by the second fixed base station FS2 as the parent node. The base station unit 42 (IAB-DU) of the mobile station MS then provides the communication device 2 with a mobile communication cell (not shown) as an extended communication cell of the second fixed communication cell FC2. In the example in Figure 2, three communication devices 2E, 2F, and 2M (all collectively referred to as communication device 2) are schematically shown, which are located in positions where they can be connected to the base station unit 42 of the mobile station MS.

[0033] Communication devices 2E, 2F, and 2M are all located within the overlapping area of ​​the first fixed communication cell FC1, the second fixed communication cell FC2, and the mobile communication cell provided by the mobile station MS (in the example in Figure 2, the extended communication cell of the second fixed communication cell FC2). Therefore, communication devices 2E, 2F, and 2M can be connected to any of the first fixed base station FS1, the second fixed base station FS2, or the mobile station MS (base station function unit 42). However, as will be described later, communication device 2E, which is located near the first fixed base station FS1 outside the mobile body V to which the mobile station MS is attached, will be preferentially connected to the first fixed base station FS1, and communication device 2F, which is located near the second fixed base station FS2 outside the mobile body V to which the mobile station MS is attached, will be preferentially connected to the second fixed base station FS2. Furthermore, communication device 2M (hereinafter also referred to as mobile communication device 2M), which is located inside the mobile body V to which the mobile station MS is attached, will be preferentially connected to the mobile station MS (base station function unit 42). Furthermore, communication devices 2E and 2F, which do not move with the mobile station MS and / or mobile body V, will be referred to as non-mobile communication devices 2, external communication devices 2, or external mobile station communication devices 2, etc., in the following terms, for convenience, in contrast to mobile communication devices 2M, which move with the mobile station MS and / or mobile body V.

[0034] The mobile station MS is attached to the mobile body V, except in cases where it can move (fly) autonomously, such as the communications satellite 131. The mobile body V is any movable object or person, including any vehicle such as a car, train, motorcycle, bicycle, airplane, or ship. The mobile station MS may also be a communications device 2 carried by a moving person, for example, a communications device 2 equipped with tethering or personal hotspot functions. Since such communications devices 2 (mobile station MS) generally function as wireless LAN access points, the RAT (e.g., 5G NR) used by the source base station (e.g., second fixed base station FS2) and the RAT used by the destination mobile station MS may be different. In this embodiment, an example in which the mobile station MS is attached to the bus V as a mobile body will be described.

[0035] The inventors have independently recognized a problem that arises when a mobile station MS (mobile unit V) passes through other communication cells such as fixed communication cells FC1 and FC2. Specifically, when a mobile station MS (mobile unit V) passes near an external mobile communication device 2 (in the example in Figure 2, an external mobile communication device 2E connected to the first fixed communication cell FC1 or an external mobile communication device 2F connected to the second fixed communication cell FC2) that was connected to the other communication cell, there is a possibility that the external mobile communication devices 2E, 2F, etc. will be temporarily connected to the mobile station MS (base station function unit 42). However, after the mobile station MS (mobile unit V) has passed through, the external mobile communication devices 2E, 2F, etc. must immediately reconnect to their original communication cells FC1, FC2, etc. As a result, resources in the external mobile communication devices 2E, 2F, etc., base stations such as fixed base stations FS1 and FS2, and the mobile station MS, etc., are wasted.

[0036] Furthermore, as shown in the example in Figure 2, when a mobile station MS is attached to a mobile device such as a bus V, the mobile communication devices 2M used by passengers on the bus V are mainly connected to the mobile station MS (base station function unit 42), but there is a possibility that they may also be temporarily connected to other communication cells FC1, FC2, etc. (outside the bus V) that the bus V passes through. However, after passing through these other communication cells FC1, FC2, etc., the mobile communication devices 2M inside the bus V must immediately reconnect to the original mobile station MS (base station function unit 42). As a result, resources in the mobile communication devices 2M, base stations such as fixed base stations FS1, FS2, etc., and the mobile station MS are wasted. In order to solve the above problems, the main objective of this embodiment described below is to provide a communication control device 3 that can streamline communication control related to the mobile station MS.

[0037] The communication control device 3 comprises a relative movement information acquisition unit 31, a communication cell identification unit 32, a communication device identification unit 33, and a connection restriction unit 34. Some of these functional blocks can be omitted as long as the communication control device 3 performs at least some of the operations and / or effects described below. These functional blocks are realized through the cooperation of hardware resources such as the computer's central processing unit, memory, input devices, output devices, and peripheral devices connected to the computer, and software executed using them. Regardless of the type or location of the computer, each of the above functional blocks may be realized with the hardware resources of a single computer, or it may be realized by combining hardware resources distributed across multiple computers. In particular, in this embodiment, some or all of the functional blocks of the communication control device 3 may be realized centrally or distributedly on computers and processors provided in the communication device 2, mobile station MS (including mobile body V), distributed units DU1 and DU2, aggregation unit CU, and core network CN.

[0038] The relative movement information acquisition unit 31 (communication device movement estimation unit) acquires or estimates relative movement information regarding the movement of communication devices 2 relative to the mobile station MS (mobile body V). The relative movement information acquisition unit 31 is provided to distinguish and recognize or estimate mobile communication devices 2M that move together with the mobile station MS, and non-mobile communication devices 2E, 2F, etc. that do not move together with the mobile station MS within the communication cells FC1, FC2, etc. that the mobile station MS passes through. For example, by acquiring the relative distance, relative velocity, relative acceleration, etc., of each communication device 2 and the mobile station MS, the relative movement information acquisition unit 31 can recognize whether each communication device 2 is making significant relative movement relative to the mobile station MS. For example, communication devices 2 whose relative distance to the mobile station MS is approximately constant or less than a predetermined value, or communication devices 2 whose relative velocity or relative acceleration relative to the mobile station MS is approximately zero, are recognized as mobile communication devices 2M that are not making significant relative movement relative to the mobile station MS. Furthermore, communication devices 2 whose relative distance to the mobile station MS is indefinite or greater than a predetermined value, or which have a significant relative velocity or relative acceleration relative to the mobile station MS, are recognized as non-mobile communication devices 2E, 2F, etc., that are undergoing significant relative movement relative to the mobile station MS.

[0039] The relative movement information acquisition unit 31 may directly acquire movement information relating to the movement of at least one of the mobile station MS (mobile body V) and the communication device 2. For this purpose, the relative movement information acquisition unit 31 may be separately provided with a mobile station information acquisition unit 311 (movement information acquisition unit) that acquires movement information relating to the movement of the mobile station MS (mobile body V) and / or a communication device information acquisition unit 312 that acquires movement information relating to the movement of the communication device 2.

[0040] The mobile station information acquisition unit 311 acquires movement information relating to the movement of the mobile station MS attached to the bus V. The movement information includes at least one of the following: the movement route of the bus V or mobile station MS, the arrival time of the bus V or mobile station MS at each location along the movement route, the traffic congestion status along the movement route, the speed of the bus V or mobile station MS, the direction of movement of the bus V or mobile station MS, and the current position of the bus V or mobile station MS. Some or all of this movement information can be acquired from the bus V or mobile station MS itself, a mobile communication device 2M used by a person on the bus V, a movement instruction device (not shown) that gives remote movement instructions to the bus V, etc. For example, the movement route, the arrival time at each location along the movement route, and the traffic congestion status along the movement route can be acquired from map applications or navigation applications installed on the bus V, mobile station MS, mobile communication device 2M, movement instruction device, etc. In addition, the speed of movement, direction of movement, and current position can be acquired from positioning modules such as GPS modules mounted on the bus V, mobile station MS, mobile communication device 2M, etc.

[0041] The mobile station information acquisition unit 311 may estimate some or all of the current mobile information of the mobile station MS attached to the bus V based on various information collected about the bus V or mobile station MS. For example, the mobile station information acquisition unit 311 can acquire various information useful for estimating the current mobile information of the bus V or mobile station MS from the NWDAF (Network Data Analytics Function) and LMF (Location Management Function) introduced in the 5GC as the core network CN of 5G. The NWDAF is responsible for collecting and analyzing data on the network, including 5G. Specifically, the NWDAF collects and stores activity history information (including history information on the base stations to which the communication devices 2, mobile station MS, and bus V are connected, and the locations of the communication devices 2, mobile station MS, and bus V) related to various activities performed on the network by a large number of communication devices 2, mobile station MS, bus V, etc. connected to the network, and utilizes the results of their analysis for, for example, network traffic control. The LMF manages the physical locations of a large number of communication devices 2, mobile station MS, bus V, etc. on the network, including 5G. It is conceivable that similar functions to NWDAF and / or LMF may be provided under different names in other wireless communication systems, including wireless communication systems of generations later than 5G. In this embodiment, such similar functions may be used in place of or in addition to NWDAF and / or LMF.

[0042] Furthermore, the mobile station information acquisition unit 311 may acquire activity history information useful for estimating the current movement information of the bus V or mobile station MS from servers used by service providers that provide map services, navigation services, location tracking services, etc., to a large number of communication devices 2, mobile stations MS, bus V, etc. connected to the network. These servers can collect activity history information (including history information regarding the location of the communication devices 2, mobile stations MS, and bus V) regarding various activities performed by the large number of communication devices 2, mobile stations MS, bus V, etc. connected to the network in connection with the services provided.

[0043] The communication device information acquisition unit 312 acquires movement information related to the movement of the communication device 2. The movement information includes at least one of the following: the movement route of the communication device 2, the arrival time of the communication device 2 at each location along the movement route, the traffic congestion status along the movement route, the movement speed of the communication device 2, the direction of movement of the communication device 2, and the current position of the communication device 2. Some or all of this movement information can be acquired from the communication device 2 itself. For example, the movement route, the arrival time at each location along the movement route, and the traffic congestion status along the movement route can be acquired from a map application or navigation application installed on the communication device 2. In addition, the movement speed, direction of movement, and current position can be acquired from a positioning module such as a GPS module mounted on the communication device 2.

[0044] The communication device information acquisition unit 312 may estimate some or all of the current movement information of the communication device 2 based on various information collected about the communication device 2. For example, the communication device information acquisition unit 312 can acquire various information useful for estimating the current movement information of the communication device 2 from the NWDAF and LMF. In addition, the communication device information acquisition unit 312 may acquire activity history information and other information useful for estimating the current movement information of the communication device 2 from a server used by a service provider that provides map services, navigation services, location tracking services, etc. to a large number of communication devices 2 connected to the network.

[0045] As described above, the relative movement information acquisition unit 31 can recognize whether there is significant relative movement of the communication device 2 with respect to the mobile station MS (mobile body V) based on the movement information of the mobile station MS (mobile body V) acquired by the mobile station information acquisition unit 311, and / or the movement information of the communication device 2 acquired by the communication device information acquisition unit 312. In addition, the relative movement information acquisition unit 31 can recognize whether there is significant relative movement of the communication device 2 with respect to the mobile station MS (mobile body V) even without directly acquiring the movement information of the mobile station MS (mobile body V) and the communication device 2 (i.e., even without the mobile station information acquisition unit 311 and the communication device information acquisition unit 312). For example, if a user of communication device 2 uses it to check in when boarding bus V (for example, by holding communication device 2 over a contactless reader installed at the entrance of bus V), or if they purchase a bus V ticket online using communication device 2, it is strongly suggested that the communication device 2 corresponding to that boarding information or boarding record is a mobile communication device 2M that does not move relative to the mobile station MS (mobile body V).

[0046] The communication cell identification unit 32 identifies communication cells FC1, FC2, etc., that the mobile station MS (mobile body V) will pass through. For example, the communication cell identification unit 32 identifies communication cells FC1, FC2, etc., that the mobile station MS (mobile body V) will pass through based on the mobile station MS (mobile body V)'s movement information acquired by the mobile station information acquisition unit 311 (movement information acquisition unit). Specifically, by comparing the arrangement information of each communication cell managed by the core network CN, aggregation unit CU, etc., with the mobile station MS (mobile body V)'s movement information acquired by the mobile station information acquisition unit 311, the communication cells FC1, FC2, etc., that the mobile station MS (mobile body V) is currently passing through, and the communication cells that the mobile station MS (mobile body V) will pass through at a future time, are identified.

[0047] The communication device identification unit 33 (mobile communication device identification unit) identifies the mobile communication device 2M that moves together with the mobile station MS (mobile body V) and / or non-mobile communication devices 2E, 2F, etc. that do not move together with the mobile station MS within the communication cells FC1, FC2, etc. that the mobile station MS (mobile body V) passes through. For example, the communication device identification unit 33 identifies the mobile communication device 2M and / or non-mobile communication devices 2E, 2F, etc. based on relative movement information for the mobile station MS (mobile body V) acquired by the relative movement information acquisition unit 31.

[0048] The connection restriction unit 34 restricts the connection between the mobile station MS (mobile device V) and non-mobile communication devices 2E, 2F, etc., that do not move with the mobile station MS (mobile device V) within the communication cells FC1, FC2, etc., that the mobile station MS (mobile device V) passes through.

[0049] When a mobile station MS (mobile unit V) passes near a non-mobile communication device 2E that was connected to the first fixed communication cell FC1, there is a possibility that the non-mobile communication device 2E may be temporarily connected to the mobile station MS (base station function unit 42). However, after the mobile station MS (mobile unit V) has passed, the non-mobile communication device 2E must immediately reconnect to the original first fixed communication cell FC1. In particular, if the tracking area or location registration area of ​​the first fixed communication cell FC1 is different from the tracking area or location registration area of ​​the mobile station MS (base station function unit 42) to which the non-mobile communication device 2E has been temporarily connected, a location registration signal will be frequently generated to register the change in the tracking area or location registration area to which the non-mobile communication device 2E belongs to the network side, increasing the power consumption of the non-mobile communication device 2E, etc. Therefore, in this embodiment, the connection restriction unit 34 restricts the connection between the non-mobile communication device 2E, identified by the communication device identification unit 33, and the mobile station MS (mobile body V), identified by the communication cell identification unit 32, in the first fixed communication cell FC1 through which the mobile station MS (mobile body V), identified by the communication cell identification unit 32, is passing. Even if the non-mobile communication device 2E is temporarily connected to the mobile station MS, it will be disconnected in a short time as the mobile station MS (mobile body V) moves away. By restricting the connection in the first place, the connection restriction unit 34 can reduce the wasteful consumption of resources in the non-mobile communication device 2E, the first fixed base station FS1 providing the first fixed communication cell FC1 through which the non-mobile communication device 2E is located and which the mobile station MS (mobile body V) is passing. Furthermore, the connection restriction unit 34, as schematically illustrated by the solid line indicating "connection permitted," prioritizes connecting non-mobile communication devices 2E that do not move with the mobile station MS (mobile device V) within the first fixed communication cell FC1 through which the mobile station MS (mobile device V) passes to the first fixed base station FS1 that provides the first fixed communication cell FC1.

[0050] Similarly, if a mobile station MS (mobile unit V) passes near a non-mobile communication device 2F that was connected to the second fixed communication cell FC2, the non-mobile communication device 2F may be temporarily connected to the mobile station MS (base station function unit 42). However, after the mobile station MS (mobile unit V) has passed, the non-mobile communication device 2F must immediately reconnect to the original second fixed communication cell FC2. In particular, if the tracking area or location registration area of ​​the second fixed communication cell FC2 is different from the tracking area or location registration area of ​​the mobile station MS (base station function unit 42) to which the non-mobile communication device 2F has been temporarily connected, a location registration signal will be frequently generated to register the change in the tracking area or location registration area to which the non-mobile communication device 2F belongs to the network side, increasing the power consumption of the non-mobile communication device 2F, etc. Therefore, in this embodiment, the connection restriction unit 34 restricts the connection between the non-mobile communication device 2F, identified by the communication device identification unit 33, and the mobile station MS (mobile body V), identified by the communication cell identification unit 32, in the second fixed communication cell FC2 through which the mobile station MS (mobile body V), identified by the communication cell identification unit 32, is passing. Even if the non-mobile communication device 2F is temporarily connected to the mobile station MS, the connection will be disconnected in a short time as the mobile station MS (mobile body V) moves away. By restricting the connection in the first place, the connection restriction unit 34 can reduce the wasteful consumption of resources in the non-mobile communication device 2F, the second fixed base station FS2 providing the second fixed communication cell FC2 through which the non-mobile communication device 2F is located and the mobile station MS (mobile body V) is passing, and the mobile station MS. Furthermore, the connection restriction unit 34, as schematically illustrated by the solid line indicating "connection permitted," prioritizes connecting non-mobile communication devices 2F that do not move with the mobile station MS (mobile device V) within the second fixed communication cell FC2 through which the mobile station MS (mobile device V) passes to the second fixed base station FS2 that provides the second fixed communication cell FC2.

[0051] The connection restriction unit 34 may prohibit connections between non-mobile communication devices 2E, 2F, etc. and mobile station MS, or may lower the priority of such connections. For example, access by non-mobile communication devices 2E, 2F, etc. to mobile communication cells (not shown), their frequency bands, their tracking areas, or location registration areas provided by mobile station MS may be prohibited or set to a low priority. If the connection restriction unit 34 is provided on communication device 2, the communication device 2 may autonomously perform the above-mentioned access prohibition or low priority setting processes. Furthermore, if the connection restriction unit 34 is provided on the network side (for example, mobile station MS, distributed unit DU, aggregation unit CU, core network CN), it may notify non-mobile communication devices 2E, 2F, etc. that connection to mobile station MS is prohibited or set to a low priority, reject connection requests from non-mobile communication devices 2E, 2F, etc. to mobile station MS, or guide non-mobile communication devices 2E, 2F, etc. to base stations FS1, FS2, etc. other than mobile station MS.

[0052] The connection restriction unit 34 on the network side may uniformly prohibit non-mobile communication devices 2E, 2F, etc. from connecting to the mobile station MS (mobile entity V) by handover by excluding the mobile communication cell used by the mobile station MS from the list of handover candidates for communication devices 2 (non-mobile communication devices 2E, 2F, etc.) from communication cells FC1, FC2, etc. that the mobile station MS (mobile entity V) passes through. In this case, processing for each communication device 2, such as acquiring mobile information of non-mobile communication devices 2E, 2F, etc. (communication device information acquisition unit 312) and identifying non-mobile communication devices 2E, 2F, etc. (communication device identification unit 33), may be omitted. Specifically, if the mobile communication cell used by the mobile station MS is excluded from the list of handover candidates managed on the network side for each communication cell FC1, FC2, etc. that the mobile station MS (mobile entity V) passes through, non-mobile communication devices 2E, 2F, etc. connected to each communication cell FC1, FC2 can spontaneously recognize that handover to the mobile station MS is prohibited by referring to the list. Therefore, it becomes unnecessary to acquire mobile information such as that of non-mobile communication devices 2E, 2F, etc., or to identify non-mobile communication devices 2E, 2F, etc., in advance. Furthermore, access control at the level of two communication devices and / or communication cells as described above may be precisely implemented using cell access control technologies such as CAG (Closed Access Group) introduced in 5G.

[0053] Furthermore, the connection restriction unit 34 restricts the connection between the communication cells FC1, FC2, etc., that the mobile station MS (mobile device V) passes through and the mobile communication device 2M that moves together with the mobile station MS (mobile device V).

[0054] A mobile communication device 2M used by passengers on a bus V to which a mobile station MS is installed is primarily connected to the mobile station MS (base station function unit 42), but it may also be temporarily connected to other communication cells FC1, FC2, etc. outside of bus V as bus V (mobile station MS) passes through. However, after passing through these other communication cells FC1, FC2, etc., the mobile communication device 2M inside bus V must immediately reconnect to the original mobile station MS (base station function unit 42). In particular, if the tracking area or location registration area of ​​the mobile station MS (base station function unit 42) differs from the tracking area or location registration area of ​​other communication cells FC1, FC2, etc. outside bus V to which the mobile communication device 2M has been temporarily connected, location registration signals to register the change in the tracking area or location registration area to which the mobile communication device 2M belongs will be frequently generated, increasing the power consumption of the mobile communication device 2M, etc. Therefore, in this embodiment, the connection restriction unit 34 restricts the connection between the mobile station MS (mobile body V) identified by the communication cell identification unit 32 and the mobile communication device 2M identified by the communication device identification unit 33, as schematically illustrated by the dotted line labeled "connection restriction". Since the mobile communication device 2M, which moves with the mobile station MS (mobile body V), will be disconnected after only a short time even if it is temporarily connected to the communication cells FC1, FC2, etc. that the mobile station MS (mobile body V) is passing through, the connection restriction unit 34 restricts the connection in the first place, thereby reducing the wasteful consumption of resources at the mobile station MS, including the mobile communication device 2M and the base stations FS1, FS2, etc. that provide the communication cells FC1, FC2, etc. that the mobile station MS (mobile body V) is passing through. Furthermore, as schematically illustrated by the solid line labeled "connection allowance", the connection restriction unit 34 prioritizes the connection of the mobile communication device 2M, which moves with the mobile station MS (mobile body V), to the mobile station MS (base station function unit 42).

[0055] The connection restriction unit 34 may prohibit connections between the mobile communication device 2M on the bus V and communication cells FC1, FC2, etc., outside the bus V, or may lower the priority of such connections. For example, access by the mobile communication device 2M to communication cells FC1, FC2, etc., outside the bus V, their frequency bands, their tracking areas, or location registration areas may be prohibited or set to a low priority. If the connection restriction unit 34 is provided on the mobile communication device 2M, the mobile communication device 2M may autonomously perform the above-mentioned access prohibition or low priority setting processes. Furthermore, if the connection restriction unit 34 is provided on the network side (for example, a mobile station MS, a distributed unit DU, an aggregation unit CU, or a core network CN), it may notify the mobile communication device 2M that connections to communication cells FC1, FC2, etc., outside the bus V are prohibited or set to a low priority, it may reject connection requests from the mobile communication device 2M to communication cells FC1, FC2, etc., outside the bus V, or it may guide the mobile communication device 2M to the mobile station MS (base station function unit 42).

[0056] The connection restriction unit 34 on the network side may uniformly prohibit connections to communication cells FC1, FC2, etc. outside the bus V by handover of the mobile communication device 2M by excluding communication cells FC1, FC2, etc. outside the bus V from the list of handover candidates for the mobile communication device 2M from the mobile communication cell (not shown) by the mobile station MS (base station function unit 42). In this case, processing for each mobile communication device 2M, such as acquiring mobile information of the mobile communication device 2M (communication device information acquisition unit 312) and identifying the mobile communication device 2M (communication device identification unit 33), may be omitted. Specifically, if communication cells FC1, FC2, etc. outside the bus V are excluded from the list of handover candidates managed on the network side regarding the mobile communication cell by the mobile station MS (base station function unit 42), the mobile communication device 2M connected to the mobile station MS (base station function unit 42) can spontaneously recognize that handover to communication cells FC1, FC2, etc. outside the bus V is prohibited by referring to the list. Therefore, it becomes unnecessary to acquire mobile communication device 2M's movement information or to identify mobile communication device 2M in advance. Furthermore, access control at the level of two communication devices and / or communication cells as described above may be precisely implemented using cell access control technologies such as CAG (Closed Access Group) introduced in 5G.

[0057] The present disclosure has been described above based on embodiments. Various modifications are possible for each component and each combination of processes in the exemplary embodiments, and it will be obvious to those skilled in the art that such modifications are included in the scope of the present disclosure.

[0058] In this embodiment, an IAB node is exemplified as the mobile station MS, but the mobile station MS may also be a relay station that relays communication radio waves between a base station (e.g., fixed base stations FS1, FS2, etc.) and a communication device 2, or the mobile station MS may be a mobile base station (e.g., a communication satellite 131) that can provide a mobile communication cell (e.g., a satellite communication cell 132) to the communication device 2.

[0059] The configuration, operation, and function of each device and method described in the embodiments can be realized by hardware resources or software resources, or by the cooperation of hardware resources and software resources. Hardware resources include, for example, processors, ROMs, RAMs, and various integrated circuits. Software resources include, for example, operating systems and application programs.

[0060] This disclosure may be expressed as follows:

[0061] Item 1: A communication control device relating to a mobile station capable of communicating with a communication device, The communication cell identification unit identifies the communication cell through which the mobile station passes, The connection restriction unit restricts the connection between a communication device that does not move with the mobile station within the communication cell and the mobile station, A communication control device comprising at least one processor that performs the following. Item 2: The mobile station is a communication control device according to item 1, capable of communicating with a base station and expanding the communication cells provided by the base station. Item 3: The communication control device according to item 2, wherein the mobile station comprises a communication device function unit that functions as a communication device for the base station, and a base station function unit that functions as a base station for a communication device with which the mobile station can communicate. Item 4: The aforementioned mobile station is an IAB (Integrated Access and Backhaul) node, The aforementioned communication device function unit is MT (Mobile Termination), The aforementioned base station function unit is a DU (Distributed Unit). The communication control device described in item 3. Item 5: The mobile station is a relay station that relays communication radio waves between the base station and the communication device, as described in item 2, for communication control device. Item 6: The communication control device according to item 1, wherein the mobile station is a mobile base station capable of providing mobile communication cells to a communication device. Item 7: The at least one processor performs the task of acquiring movement information relating to the movement of the mobile station by the movement information acquisition unit, The communication cell identification unit identifies the communication cell through which the mobile station passes based on the movement information. A communication control device as described in any of items 1 through 6. Item 8: The at least one processor performs the task of estimating whether the communication device in the communication cell is moving together with the mobile station, using the communication device movement estimation unit. The connection restriction unit restricts the connection between a communication device that is presumed not to move with the mobile station within the communication cell and the mobile station. A communication control device as described in any of items 1 through 7. Item 9: The at least one processor performs the task of estimating whether the communication device in the communication cell is moving together with the mobile station, using the communication device movement estimation unit. The connection limiting unit connects a communication device that is presumed to be moving with the mobile station within the communication cell to the mobile station. A communication control device as described in any of items 1 through 8. Item 10: The connection restriction unit excludes the mobile communication cell operated by the mobile station from the candidates for handover of the communication device from the communication cell, according to any one of items 1 to 7. Item 11: A communication control device relating to a mobile station capable of communicating with a communication device, The connection restriction unit excludes the mobile communication cell used by the mobile station from the candidates for handover of the communication device from the communication cell through which the mobile station passes. A communication control device comprising at least one processor that performs the following. Item 12: The mobile station is a communication control device according to any one of items 1 to 11, which is attached to a mobile body. Item 13: A communication control method relating to a communication device and a mobile station capable of communication, Identifying the communication cell through which the aforementioned mobile station passes, Restricting the connection between a communication device that does not move with the mobile station within the aforementioned communication cell and the said mobile station, A communication control method comprising the following: Item 14: A communication control program relating to a communication device and a mobile station capable of communication, Identifying the communication cell through which the aforementioned mobile station passes, Restricting the connection between a communication device that does not move with the mobile station within the aforementioned communication cell and the said mobile station, A storage medium that stores a communication control program that causes a computer to execute a command. Item 15: The at least one processor performs the task of identifying a mobile communication device that moves together with the mobile station using a mobile communication device identification unit. The connection restriction unit restricts the connection between the communication cell and the mobile communication device. A communication control device as described in any of items 1 through 12. Item 16: A communication control device relating to a mobile station capable of communicating with a communication device, The mobile communication device identification unit identifies the mobile communication device that moves together with the mobile station, The connection restriction unit restricts the connection between the communication cell through which the mobile station passes and the mobile communication device, A communication control device comprising at least one processor that performs the following. Item 17: The communication control device according to item 16, wherein the mobile station is capable of communicating with a base station to expand the communication cells provided by the base station. Item 18: The communication control device according to item 17, wherein the mobile station comprises a communication device function unit that functions as a communication device for the base station, and a base station function unit that functions as a base station for a communication device with which the mobile station can communicate. Item 19: The aforementioned mobile station is an IAB (Integrated Access and Backhaul) node, The aforementioned communication device function unit is MT (Mobile Termination), The aforementioned base station function unit is a DU (Distributed Unit). The communication control device described in item 18. Item 20: The communication control device described in item 17, wherein the mobile station is a relay station that relays communication radio waves between the base station and the communication device. Item 21: The communication control device according to item 16, wherein the mobile station is a mobile base station capable of providing mobile communication cells to a communication device. Item 22: The at least one processor performs the acquisition of relative movement information relating to the movement of the communication device relative to the mobile station by the relative movement information acquisition unit, The mobile communication device identification unit identifies the mobile communication device based on the relative movement information. A communication control device as described in any of items 15 to 21. Item 23: The connection limiting unit is a communication control device according to any one of items 15 to 22, which connects the mobile communication device to the mobile station. Item 24: The connection restriction unit excludes the communication cell through which the mobile station passes from the candidates for handover of the mobile communication device from the mobile communication cell by the mobile station, according to any one of items 15 to 23. Item 25: A communication control device relating to a mobile station capable of communicating with a communication device, The connection restriction unit excludes the communication cell through which the mobile station passes from the handover candidates for the mobile communication device moving with the mobile station from the mobile communication cell by the mobile station. A communication control device comprising at least one processor that performs the following. Item 26: The mobile station is a communication control device according to any one of items 16 to 25, which is attached to a mobile body. Item 27: A communication control method relating to a communication device and a mobile station capable of communication, Identifying the mobile communications device that moves together with the aforementioned mobile station, Restricting the connection between the communication cell through which the mobile station passes and the mobile communication device, A communication control method comprising the following: Item 28: A communication control program relating to a communication device and a mobile station capable of communication, Identifying the mobile communications device that moves together with the aforementioned mobile station, Restricting the connection between the communication cell through which the mobile station passes and the mobile communication device, A storage medium that stores a communication control program that causes a computer to execute a command. [Industrial applicability]

[0062] This disclosure relates to communication control technology in wireless communication systems. [Explanation of Symbols]

[0063] 1 Wireless communication system, 2 Communication device, 2M mobile communication device, 3 Communication control device, 11 5G wireless communication system, 12 4G wireless communication system, 13 Satellite communication system, 31 Relative movement information acquisition unit, 32 Communication cell identification unit, 33 Communication device identification unit, 34 Connection restriction unit, 41 Communication device function unit, 42 Base station function unit, 111 5G base station, 112 5G cell, 121 4G base station, 122 4G cell, 131 Communication satellite, 132 Satellite communication cell, 133 Gateway, 311 Mobile station information acquisition unit, 312 Communication device information acquisition unit.

Claims

1. A communication control device relating to a mobile station capable of communicating with a communication device, The communication cell identification unit identifies the communication cell that the mobile station passes through, which is provided by a base station different from the mobile station. The communication device movement estimation unit estimates whether the communication device moves together with the mobile station based on the relative velocity and / or relative acceleration of the communication device within the communication cell and the mobile station, The connection restriction unit, based on the estimation by the communication device movement estimation unit, prioritizes connecting communication devices that are moving with the mobile station while passing through the communication cell to the mobile station from the base station, and prioritizes connecting communication devices that are not moving with the mobile station while passing through the communication cell to the base station from the mobile station. A communication control device comprising at least one processor that performs the following.

2. The communication control device according to claim 1, wherein the mobile station is capable of communicating with the base station and expanding the communication cell provided by the base station.

3. The communication control device according to claim 2, wherein the mobile station comprises a communication device function unit that functions as a communication device for the base station, and a base station function unit that functions as a base station for a communication device with which the mobile station can communicate.

4. The aforementioned mobile station is an IAB (Integrated Access and Backhaul) node, The aforementioned communication device function unit is MT (Mobile Termination), The aforementioned base station function unit is a DU (Distributed Unit). The communication control device according to claim 3.

5. The communication control device according to claim 2, wherein the mobile station is a relay station that relays communication radio waves between the base station and the communication device.

6. The communication control device according to claim 1, wherein the mobile station is a mobile base station capable of providing a mobile communication cell to a communication device.

7. The at least one processor performs the task of acquiring movement information relating to the movement of the mobile station by the movement information acquisition unit, The communication cell identification unit identifies the communication cell through which the mobile station passes based on the movement information. The communication control device according to claim 1.

8. The communication control device according to claim 1, wherein the connection limiting unit excludes a mobile communication cell operated by the mobile station from the candidates for handover from the communication cell of a communication device that is presumed not to move with the mobile station.

9. The aforementioned mobile station is attached to a mobile body, The communication device movement estimation unit estimates whether the communication device in the communication cell is located within the mobile body based on the passenger information or passenger record relating to the mobile body. The connection restriction unit prioritizes connecting a communication device presumed to be located within the mobile device to the mobile station rather than the base station. The communication control device according to claim 1.

10. A communication control method relating to a communication device and a mobile station capable of communication, Identifying the communication cell provided by a base station different from the mobile station that the aforementioned mobile station passes through, Estimating whether the communication device moves together with the mobile station based on the relative speed and / or relative acceleration of the communication device within the communication cell and the mobile station, Based on the above estimation, the base station will prioritize connecting communication devices that are moving with the mobile station while the mobile station is moving and passing through the communication cell to the mobile station, and will prioritize connecting communication devices that are not moving with the mobile station while the mobile station is moving and passing through the communication cell to the base station. A communication control method comprising the following:

11. A communication control program relating to a communication device and a mobile station capable of communication, Identifying the communication cell provided by a base station different from the mobile station that the aforementioned mobile station passes through, Estimating whether the communication device moves together with the mobile station based on the relative speed and / or relative acceleration of the communication device within the communication cell and the mobile station, Based on the above estimation, the base station will prioritize connecting communication devices that are moving with the mobile station while the mobile station is moving and passing through the communication cell to the mobile station, and will prioritize connecting communication devices that are not moving with the mobile station while the mobile station is moving and passing through the communication cell to the base station. A storage medium that stores a communication control program that causes a computer to execute a command.

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