WO2019229853A1 - Management node, transfer node, and communication system - Google Patents

Abstract

This communication system 1 is configured so that a plurality of communication nodes can exist within a service area and configured by including a plurality of transfer nodes 10 that perform relay processing of packets transmitted and received between two communication nodes and a management node 20 that stores node information, which is information indicating the transfer node 10 as a target within the service area for each of the plurality of communication nodes, referred to when the relay processing is performed in the plurality of transfer nodes 10. The communication system 1 comprises: a prediction unit 203 that predicts a future communication target by each of the plurality of communication nodes on the basis of communication logs of the packets and registers information on the communication target in node information corresponding to the communication node; and a node information transmission unit 204 that transmits the node information by each of the plurality of communication nodes in advance to the communication node 10 corresponding to the information on the communication target registered in the node information.

Description

Management node, forwarding node and communication system

The present invention relates to a management node, a transfer node, and a communication system that relay data between communication nodes.

Conventionally, a routing method for relaying a signal by referring to routing information regarding a signal transfer destination has been widely used. For example, in Patent Document 1 below, when routing information for a signal transfer destination signal station is held, routing is performed according to the routing information, and routing information for a signal transfer destination signal station is not held. Describes a signal relay station that requests routing to an upper signal station that manages the own station.

Japanese Patent Laid-Open No. 10-164242

In the method described in Patent Document 1, a procedure for requesting a higher-level signal station is required when the routing information for the signal station to which the signal is transferred is not held. Time tends to increase. In particular, in a communication system that relays data in a plurality of transfer nodes that can be dynamically connected to a communication node, a data relay delay occurs due to an inquiry process when routing information about the relay destination is not held. There was a trend.

Therefore, in order to solve the above-described problem, the present invention provides a management capable of avoiding a data relay delay when relaying data in a plurality of transfer nodes to which a communication node can be dynamically connected. An object is to provide a node, a forwarding node, and a communication system.

In order to solve the above-described problem, a management node according to one aspect of the present invention is configured to be communicably connected to a transfer node that performs relay processing of data transmitted and received between a plurality of communication nodes. Is a management node for storing node information that is referred to during relay processing in a plurality of transfer nodes, and that is based on a data communication log for each of the plurality of communication nodes. The information related to the future communication partner predicted in the node is registered in the node information corresponding to the communication node, and the node information for each of the plurality of communication nodes is transferred corresponding to the information related to the communication partner registered in the node information. Pre-send to node.

The forwarding node according to one aspect of the present invention is configured to be communicably connected to the management node, and performs relay processing of data transmitted / received between a plurality of communication nodes based on node information received from the management node. Do.

The communication system according to one aspect of the present invention includes the management node and the forwarding node.

According to any one of the above aspects, the transfer node includes a plurality of communication nodes configured to be communicable and a management node that stores node information regarding the transfer node that is communication-connected for each of the plurality of communication nodes. In the communication system, node information for each of the plurality of communication nodes is transmitted in advance to a forwarding node corresponding to a future communication partner predicted for each of the plurality of communication nodes. Thereby, when data is relayed in the forwarding node, node information related to the forwarding destination forwarding node can be referred to efficiently, so that delay of data relaying can be avoided.

According to the embodiment of the present invention, it is possible to avoid a delay in data relay when relaying data in a plurality of transfer nodes in which communication nodes can be dynamically connected.

It is a figure which shows the system configuration | structure of the communication system 1 of this embodiment. It is a block diagram which shows the function structure of the forwarding node 10 and the management node 20 of this embodiment. It is a figure which shows the data structure of the node information stored in the node information storage part 102 of FIG. It is a figure which shows the data structure of the node information stored in the node information storage part 201 of FIG. 3 is a diagram illustrating a processing sequence for registering node information in the communication system 1. FIG. FIG. 3 is a diagram illustrating a processing sequence of node information transmission in the communication system 1; 2 is a diagram illustrating a hardware configuration of a forwarding node 10 and a management node 20. FIG. It is a figure which shows the data structure of the node information stored in the node information storage part 201 in the communication system 1 concerning a 1st modification. It is a figure which shows the process sequence of the node information registration in a 1st modification. It is a block diagram which shows the function structure of the transfer node 10A concerning the 2nd modification, and the management node 20A. It is a figure which shows the process sequence of the node information registration in a 2nd modification. It is a figure which shows the process sequence of the node information registration in a 2nd modification.

Embodiments of the present invention will be described with reference to the accompanying drawings. Where possible, the same parts are denoted by the same reference numerals, and redundant description is omitted.

FIG. 1 is a diagram showing a system configuration of a communication system 1 according to the present embodiment. As shown in FIG. 1, a communication system 1 is a node group constituting a communication network that relays data between communication nodes such as user terminals (UEs) or server devices, and includes a plurality of transfer nodes. 10 and at least one management node 20. The management node 20 is configured to be communicably connected to a plurality of transfer nodes 10, and is a node that collectively manages the communication connection states of the communication nodes in the plurality of transfer nodes 10. The forwarding node 10 is configured to be communicably connected to the forwarding node 10. The forwarding node 10 is configured to be dynamically communicable with the communication node using wireless communication or wired communication, and the communication node communicably connected to the own node and the communication node communicably connected to another node. Node that relays packets (data) between The forwarding node 10 can also relay packets between a communication node that is communicatively connected to the own node and a communication node that is communicatively connected to the own node. That is, the forwarding node 10 is configured to be communicably connected to any communication node as the communication node moves.

In FIG. 1, an example is illustrated in which the forwarding nodes 10 include six forwarding nodes 10a, 10b, 10c, 10d, 10e, and 10f. However, the number of forwarding nodes 10 is not limited to a specific number. The management node 20 is not limited to one and may be two or more. In FIG. 1, UE 31 that is a communication node is communicatively connected to transfer node 10 d, server device 32 that is a communication node is communicatively connected to transfer node 10 f, and UE 33 that is a communication node is transferred to transfer node 10 e. The UE 34 as a communication node is communicatively connected to the forwarding node 10a. In the following, the state in which the communication node is connected to the specific forwarding node 10 is also referred to as “the communication node is located in the specific forwarding node 10”.

FIG. 2 is a block diagram showing functional configurations of the forwarding node 10 and the management node 20 of FIG. As shown in FIG. 2, the forwarding node 10 includes a relay processing unit 101, a node information storage unit 102, and a communication log transmission unit 103. The management node 20 includes a node information storage unit 201, a communication log reception unit 202, a prediction unit 203, and a node information transmission unit 204. Hereinafter, each configuration of the forwarding node 10 and the management node 20 will be described.

First, the components of the forwarding node 10 will be described. Note that the forwarding nodes 10a, 10b, 10c, 10d, 10e, and 10f shown in FIG. 1 all have the same configuration.

The relay processing unit 101 transfers a packet transmitted from a communication node located in the forwarding node 10 that is the local node to the forwarding node 10 that is another node in which the communication node that is the destination of the packet is located. Relay. Further, the relay processing unit 101 relays a packet transmitted from the forwarding node 10 which is another node to a communication node located in the forwarding node 10 which is the own node, to the communication node. At this time, the relay processing unit 101 identifies the forwarding node 10 in which the communication destination node of the packet is located based on the node information (routing information) stored in the node information storage unit 102, and the identified forwarding The packet is relayed to the node 10. In addition, when the transmission destination of the packet is a communication node located in the forwarding node 10 that is the own node, the relay processing unit 101 relays the packet to the communication node that is communicably connected to the own node.

FIG. 3 shows the data structure of the node information stored in the node information storage unit 102. Here, an example of the data configuration of the node information stored in the node information storage unit 102 of the forwarding node 10f (FIG. 1) is shown. In this way, in the node information, for each of the communication node identifiers “UE3” and “server 2” for identifying the communication node, the transfer node 10 in which those communication nodes are located is identified. Forwarding node identifiers “forwarding node E” and “forwarding node F” are stored in association with each other. With such node information, the relay processing unit 101 is communicatively connected to the forwarding node 10e, which is another node identified by the forwarding node identifier “forwarding node E”, with the UE 33 identified by the communications node identifier “UE3”. It is possible to determine that it is in the area and relay a packet whose destination is the UE 33 to the forwarding node 10e. In addition, the relay processing unit 101 is communicatively connected to the forwarding node 10f that is the local node identified by the forwarding node identifier “forwarding node F” and the server device 32 identified by the communications node identifier “server 2” (present). The packet having the server device 32 as the transmission destination can be relayed to the server device 32.

Here, among the node information stored in the node information storage unit 102, the node information related to the communication node located in the own node detects that the communication node is first connected to the own node (being located). To be registered. Also, this node information is deleted at the timing when it is detected that the forwarding node 10 in which the communication node is located has changed from its own node to another node. In addition, among the node information stored in the node information storage unit 102, node information related to a communication node located in another node is referred from the management node 20 when a packet having the communication node as a transmission destination is generated. It can also be acquired, stored (cached) for a certain period of time after being acquired from the management node 20, and can be referred to when a subsequent packet is relayed. Further, node information related to communication nodes residing in other nodes can be acquired and stored in advance from the management node 20 by the function of the management node 20 described later.

Returning to FIG. 2, the communication log transmission unit 103 collects a communication log related to a packet transmitted from a communication node located in the local node, and the communication log is collected as needed (for example, every time a packet is generated, Or, periodically) to the management node 20. For example, the communication log transmission unit 103 of the forwarding node 10e (FIG. 1) is a UE 33 identified by the communication node identifier “UE3” as a communication node residing in its own node. When the generation of a packet having the server device 32 identified by the communication node identifier “server 2” and the occurrence of the packet having the transmission destination identified by the UE 34 identified by the communication node identifier “UE4” are detected, the communication log “UE3: Server 2, UE4” is transmitted. From such a communication log, it is possible to specify the occurrence of two packets whose destinations are the server device 32 and the UE 34 from the UE 33.

Next, components of the management node 20 will be described.

The node information storage unit 201 is information for specifying the forwarding node 10 located in each of the plurality of communication nodes, and is a part that stores node information that is referred to during packet relay processing in the forwarding node 10.

FIG. 4 shows the data structure of the node information stored in the node information storage unit 201. Thus, in the node information, for each of the communication node identifiers “UE1”, “server 2”, “UE3”, “UE4” for identifying the communication node, those communication nodes are located. Forwarding node identifiers “forwarding node D”, “forwarding node F”, “forwarding node E”, and “forwarding node A” for identifying the forwarding node 10 are stored in association with each other. With such node information, the UE 31, the server device 32, the UE 33, and the UE 34 identified by the communication node identifiers “UE1”, “server 2”, “UE3”, “UE4” are respectively transferred to the forwarding node identifier “forwarding node”. D ”,“ forwarding node F ”,“ forwarding node E ”, and“ forwarding node A ”can be determined to be located in forwarding nodes 10d, 10f, 10e, and 10a. A packet relay process can be executed by referring to the node information.

Here, the node information stored in the node information storage unit 201 is registered when the transfer node 10 is notified that each communication node is first located in the transfer node 10. The node information is updated by notifying the transfer node 10 that the transfer node 10 in which the communication node is located has been changed.

Also, the node information for each communication node is associated with a communication log indicating a history regarding the transmission destination of the packet transmitted from the communication node and information indicating a future communication partner of the communication node. Stored. This communication log is information stored based on the communication log transmitted from the communication log transmission unit 103 of the transfer node 10, and information on the communication partner is information predicted by the prediction unit 203 based on this communication log. It is.

2 again, the communication log receiving unit 202 receives the communication log for each communication node transmitted from the transfer node 10. The communication log receiving unit 202 adds the received communication log to the node information related to the corresponding communication node and registers it.

The prediction unit 203 refers to the communication log included in the node information for each of the plurality of communication nodes, and predicts a future communication partner based on the communication log. That is, the prediction unit 203 identifies the communication frequency for each communication node of the communication partner from the communication log acquired within a certain period, and the communication partner with the higher communication frequency (for example, the predetermined number in the order of the higher communication frequency). Communication partner or a communication partner whose communication frequency exceeds a predetermined threshold) is predicted as a future communication partner. It is assumed that the communication partner predicted in this way has a high probability that the corresponding communication node will be a transmission destination for transmitting future packets. Then, the prediction unit 203 adds information indicating the communication partner predicted for each of the plurality of communication nodes to the node information corresponding to the communication node stored in the node information storage unit 201 and registers the information. For example, as illustrated in FIG. 4, the prediction unit 203 performs communication using the server device 32 as a transmission destination based on the communication log “server 2, UE 4, server 2” regarding the UE 33 identified by the communication node identifier “UE3”. The frequency is two times, and the communication frequency with the UE 34 as the transmission destination is specified as one time. As a result, the prediction unit 203 predicts that the future communication partner of the UE 33 is the server device 32 having a relatively high communication frequency, and corresponds the information “server 2” for identifying the predicted communication partner to the UE 33. Register the node information.

On the other hand, the prediction unit 203 identifies the communication rate for each communication node of the communication partner from the communication log, and the communication partner with the higher communication rate (for example, a predetermined number of communication partners with the highest communication rate, or A communication partner whose communication ratio exceeds a predetermined threshold value) may be predicted as a future communication partner. The communication counterpart predicted in this way is also assumed to have a high probability that the corresponding communication node will be a transmission destination for transmitting future packets. Specifically, the prediction unit 203 determines the ratio of the total number of packet transmissions within a predetermined period and the number of transmissions with a specific communication node as a transmission destination as a communication ratio for communication with the specific communication node as a transmission destination. And a transmission destination with a high communication rate is predicted as a future communication partner. For example, according to the example of FIG. 4, based on the communication log “Server 2, UE 4, Server 2” regarding the UE 33, the total number of packet transmissions is 3, the number of transmissions with the server device 32 as a transmission destination is 2, The number of transmissions with the UE 34 as the transmission destination is specified as one. As a result, the communication ratio with the server device 32 as the transmission destination is calculated as 2/3, the communication ratio with the UE 34 as the transmission destination is calculated as 1/3, and the future communication partner of the UE 33 compares the communication ratio. It is predicted that the server device 32 is high.

The node information transmission unit 204 transmits in advance the node information stored in the node information storage unit 201 to the forwarding node 10 corresponding to the communication partner information registered in the node information. That is, the node information transmission unit 204 transmits in advance node information for each of the plurality of communication nodes to the forwarding node 10 in which the communication node predicted as the future communication partner of each communication node is located. According to the example of FIG. 4, the server device 32 identified by the node information “UE3: forwarding node E” regarding the UE 33 is identified by the information “server 2” of the communication partner registered in the node information. To the forwarding node 10f identified by the forwarding node identifier “forwarding node F”. The transmission timing of the node information may be a periodic timing, or triggered by the communication node predicted to be a future communication partner started communication connection to the forwarding node 10 (being located). The timing may be as follows.

Next, a processing sequence in the communication system 1 in the present embodiment will be described. FIG. 5 is a diagram illustrating a processing sequence for registering node information in the communication system 1, and FIG. 6 is a diagram illustrating a processing sequence for transmitting node information in the communication system 1.

First, the procedure for registering node information when a packet is transmitted from the UE 33 to the server device 32 in the communication system 1 will be described with reference to FIG.

When a packet whose destination is the server device 32 is transmitted from the UE 33, the forwarding node 10e and the forwarding node 10f relay the packet toward the server device 32 (step S1). At this time, it is assumed that the transfer node 10e holds a communication log in which the transmission destinations related to the packets transmitted from the UE 33 are specified by the “server 2” and “UE 4”.

Then, the communication log transmission unit 103 of the forwarding node 10e adds a communication log with the transmission destination “server 2” to the communication log related to the packet transmitted from the UE 33, and holds the communication log (step S3). S2). Thereafter, the communication log held in the forwarding node 10e is transmitted to the management node 20 at any time (for example, periodically) (step S3).

The communication log receiving unit 202 of the management node 20 that has received the communication log registers the communication log in the node information corresponding to the UE 33, and then the prediction unit 203 of the management node 20 refers to the communication log in the registered node information. Then, a future communication partner is predicted for the UE 33 (step S4). Furthermore, the prediction unit 203 of the management node 20 registers the information of the communication node identifier “server 2” that identifies the predicted communication partner in the node information corresponding to the UE 33 (step S5). The node information registration process in the management node 20 as described above is repeatedly executed for each of a plurality of communication nodes.

With reference to FIG. 6, the procedure of the node information transmission from the management node 20 to the forwarding node 10 in the communication system 1 will be described. The transmission timing of the node information for each of the plurality of communication nodes registered in the management node 20 may be periodic, or is the timing at which the communication node starts to be located in the forwarding node 10 to which the node information is transmitted. May be. Here, the procedure of node information transmission at the latter timing will be described.

First, a location registration signal is transmitted from the UE 34 to the management node 20 via the transfer node 10a at the timing when the UE 34 starts communication connection (location) to the transfer node 10a (step S11). This location registration signal enables the management node 20 to grasp that the UE 34 has started visiting the forwarding node 10a. The node information transmission unit 204 of the management node 20 obtains the communication node identifier “UE4” for identifying the UE 34 when the UE 34 knows that the UE 34 is in the forwarding node 10a based on the location registration signal. Node information included as information is referenced from the node information storage unit 201 (step S12).

Next, the node information transmission unit 204 of the management node 20 displays node information (for example, “UE1: node D”) indicating the location of each communication node registered in the referenced node information, and the UE 34 indicates the location. It transmits to the forwarding node 10a that has started (step S13). Then, the forwarding node 10a stores the received node information in the node information storage unit 102 (step S14).

Next, operational effects of the communication system 1 configured as in the present embodiment will be described.

According to the present embodiment, a plurality of transfer nodes 10 configured such that a plurality of communication nodes can be located (communication connection), and management for storing node information regarding the destination transfer node 10 for each of the plurality of communication nodes In a communication system including the node 20, a future communication partner is predicted for each of the plurality of communication nodes, and node information for each of the plurality of communication nodes is transmitted in advance to the transfer node 10 corresponding to the predicted communication partner. The Thereby, when relaying a packet in the forwarding node 10, the node information regarding the forwarding node 10 as a relay destination can be referred to efficiently, so that a delay in data relay can be avoided.

That is, it is possible to suppress signaling of a control signal for specifying a forwarding destination node at the time of packet relay processing, thereby avoiding packet transmission delay. A method in which the management node 20 transmits node information related to all communication nodes to all transfer nodes 10 in advance is also conceivable. In the present embodiment, control signal signaling can be suppressed as compared with such a method, and overall efficient packet transmission can also be realized.

In the communication system 1 configured as in the present embodiment, the prediction unit 203 predicts a communication node as a future communication partner, and the node information transmission unit 204 is a communication node predicted as a communication partner. Node information is transmitted in advance to the forwarding node 10 in which the node is located. With this configuration, when relaying a packet in the forwarding node 10, node information regarding the forwarding node 10 in which the communication node that is the relay destination of the packet is located can be referred to efficiently. It can be avoided reliably.

Furthermore, the node information transmitting unit 204 transmits node information to the forwarding node 10 when a communication node predicted as a communication partner starts to be located in the forwarding node 10. In this way, the node information related to the forwarding node 10 in which the communication node to which the packet is relayed is located can be efficiently transmitted to the forwarding node 10 before the packet relay processing. As a result, when relaying a packet in the forwarding node 10, a delay in packet communication can be avoided more reliably.

Further, the prediction unit 203 predicts a future communication partner based on the communication frequency or communication ratio for each communication partner specified from the communication log. In this case, a future communication partner for each communication node can be appropriately predicted, and as a result, a delay in packet communication can be avoided more reliably.

The block diagram used in the description of the above embodiment shows functional unit blocks. These functional blocks (components) are realized by any combination of hardware and / or software. Further, the means for realizing each functional block is not particularly limited. That is, each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.

For example, the forwarding node 10 and the management node 20 in one embodiment of the present invention may function as a computer that performs the processing of the present embodiment. FIG. 7 is a diagram illustrating an example of a hardware configuration of the forwarding node 10 and the management node 20 according to the present embodiment. The above-described transfer node 10 or the like may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like.

In the following description, the term “apparatus” can be read as a circuit, a device, a unit, or the like. The hardware configuration of the forwarding node 10 or the like may be configured to include one or a plurality of devices illustrated in FIG. 7, or may be configured not to include some devices.

Each function in the transfer node 10 and the like is performed by causing the processor 1001 to perform computation by reading predetermined software (program) on hardware such as the processor 1001 and the memory 1002, and performing communication by the communication device 1004, the memory 1002, and the storage. This is realized by controlling reading and / or writing of data in 1003.

The processor 1001 controls the entire computer by operating an operating system, for example. The processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like. For example, the relay processing unit 101, the communication log transmission unit 103, and the like may be realized by the processor 1001.

Further, the processor 1001 reads programs (program codes), software modules, and data from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these. As the program, a program that causes a computer to execute at least a part of the operations described in the above embodiments is used. For example, the relay processing unit 101, the communication log transmission unit 103, and the like may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks. Although the above-described various processes have been described as being executed by one processor 1001, they may be executed simultaneously or sequentially by two or more processors 1001. The processor 1001 may be implemented by one or more chips. Note that the program may be transmitted from a network via a telecommunication line.

The memory 1002 is a computer-readable recording medium and includes, for example, at least one of ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electrically Erasable Programmable ROM), RAM (Random Access Memory), and the like. May be. The memory 1002 may be called a register, a cache, a main memory (main storage device), or the like. The memory 1002 can store a program (program code), a software module, and the like that can be executed to implement the communication method according to the embodiment of the present invention.

The storage 1003 is a computer-readable recording medium such as an optical disk such as a CD-ROM (Compact Disc ROM), a hard disk drive, a flexible disk, a magneto-optical disk (for example, a compact disk, a digital versatile disk, a Blu-ray). (Registered trademark) disk, smart card, flash memory (for example, card, stick, key drive), floppy (registered trademark) disk, magnetic strip, and the like. The storage 1003 may be referred to as an auxiliary storage device. The storage medium described above may be, for example, a database, server, or other suitable medium including the memory 1002 and / or the storage 1003.

The communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like. For example, the relay processing unit 101, the communication log transmission unit 103, and the like described above may be realized by the communication device 1004.

The input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside. The output device 1006 is an output device (for example, a display, a speaker, an LED lamp, etc.) that performs output to the outside. The input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).

Also, each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information. The bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.

In addition, the transfer node 10 and the like include hardware such as a microprocessor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a programmable logic device (PLD), and a field programmable gate array (FPGA). A part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.

As mentioned above, although this embodiment was described in detail, it is clear for those skilled in the art that this embodiment is not limited to embodiment described in this specification. The present embodiment can be implemented as a modification and change without departing from the spirit and scope of the present invention defined by the description of the scope of claims. Therefore, the description of the present specification is for illustrative purposes and does not have any limiting meaning to the present embodiment.

In the above embodiment, the communication node is predicted as the future communication partner for each communication node, but the forwarding node 10 may be predicted as the future communication partner.

FIG. 8 shows an example of the data configuration of the node information stored in the node information storage unit 201 in the communication system 1 according to the first modification that predicts the forwarding node 10 as a future communication partner. In this first modified example, when the communication log transmission unit 103 of the forwarding node 10 detects the occurrence of a packet from another communication node located in the own node via another node, A transfer node identifier for identifying a certain other node is transmitted as a communication log. In response to this, the communication log receiving unit 202 of the management node 20 adds and registers the received communication log including the transfer node identifier to the node information regarding the corresponding communication node. For example, as shown in FIG. 8, the node information related to the UE 33 identified by the communication node identifier “UE3” includes the forwarding nodes identified by the forwarding node identifiers “forwarding node F”, “forwarding node A”, and “forwarding node F”. A communication log related to packet relay via the node 10 is registered.

FIG. 9 is a sequence diagram illustrating a procedure for registering node information when a packet is transmitted from the UE 33 via the forwarding node 10f in the communication system 1 according to the first modification.

First, when a packet having the forwarding destination 10f as the relay destination is transmitted from the UE 33, the forwarding node 10e and the forwarding node 10f relay the packet (step S21). At this time, it is assumed that the forwarding node 10e holds a communication log in which the forwarding destination related to the packet transmitted from the UE 33 is specified by “forwarding node F” and “forwarding node A”.

Then, the communication log transmission unit 103 of the forwarding node 10e adds a communication log with the forwarding destination “forwarding node F” to the communication log related to the packet transmitted from the UE 33, and holds the communication log ( Step S22). Thereafter, the communication log held in the forwarding node 10e is transmitted to the management node 20 at any time (for example, periodically) (step S23).

The communication log receiving unit 202 of the management node 20 that has received the communication log registers the communication log in the node information corresponding to the UE 33, and then the prediction unit 203 of the management node 20 refers to the communication log in the registered node information. Then, a future communication partner is predicted for the UE 33 (step S24). Further, the prediction unit 203 of the management node 20 registers the information of the forwarding node identifier “forwarding node F” that identifies the predicted communication partner in the node information corresponding to the UE 33 (step S25). The node information registration process in the management node 20 as described above is repeatedly executed for each of a plurality of communication nodes.

According to such a first modification, the forwarding node 10 is predicted as the communication partner in the prediction unit 203, and the node information is transmitted in advance to the forwarding node 10 predicted as the communication partner in the node information transmission unit 204. . With this configuration, when relaying a packet in the forwarding node 10, node information related to the forwarding node 10 that is the relay destination of the packet can be referred to efficiently, so that a delay in packet relay can be reliably avoided.

Further, in the above-described embodiment and the first modification, the prediction process of the future communication partner for each communication node is performed in the management node 20, but the prediction process may be performed in the forwarding node 10. FIG. 10 is a block diagram illustrating functional configurations of the forwarding node 10A and the management node 20A according to the second modification. The configuration of the second modification is different from the configuration of the embodiment shown in FIG. 2 in that the forwarding node 10A is provided with a prediction unit 104 that is a functional unit responsible for prediction processing of a future communication partner. To do.

FIG. 11 is a sequence diagram showing a procedure for registering node information when a packet whose destination is the server device 32 is transmitted from the UE 33 in the second modification. As described above, in the procedure composed of steps S31 to S35 in the second modified example, the communication partner is predicted based on the communication log as compared with the procedure composed of steps S1 to S5 in the embodiment shown in FIG. The difference is that the process is executed in the forwarding node 10 (step S33) and that the information of the predicted communication partner is transmitted from the forwarding node 10 to the management node 20 (step S34).

FIG. 12 is a sequence diagram showing a procedure for registering node information when a packet is transmitted from the UE 33 via the forwarding node 10f in the second modified example. As described above, in the procedure composed of steps S41 to S45 in the second modified example, the communication partner based on the communication log is compared with the procedure composed of steps S21 to S25 in the first modified example shown in FIG. The prediction process is executed in the transfer node 10 (step S43), and the information on the predicted communication partner is transmitted from the transfer node 10 to the management node 20 (step S44).

The notification of information is not limited to the aspect / embodiment described in this specification, and may be performed by other methods. For example, notification of information includes physical layer signaling (for example, DCI (Downlink Control Information), UCI (Uplink Control Information)), upper layer signaling (for example, RRC (Radio Resource Control) signaling, MAC (Medium Access Control) signaling), It may be implemented by broadcast information (MIB (Master Information Block), SIB (System Information Block)), other signals, or a combination thereof. Also, the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRC Connection Setup) message, an RRC connection reconfiguration (RRC Connection Reconfiguration) message, or the like.

Each aspect / embodiment described in this specification includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), SUPER 3G, IMT-Advanced, 4G, 5G, FRA (Future Radio Access), W-CDMA. (Registered trademark), GSM (registered trademark), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE 802.20, UWB (Ultra-WideBand), The present invention may be applied to a Bluetooth (registered trademark), a system using another appropriate system, and / or a next generation system extended based on the system.

The processing procedures, sequences, flowcharts and the like of each aspect / embodiment described in this specification may be switched in order as long as there is no contradiction. For example, the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.

Information etc. can be output from the upper layer (or lower layer) to the lower layer (or upper layer). Input / output may be performed via a plurality of network nodes.

The input / output information or the like may be stored in a specific location (for example, a memory) or may be managed by a management table. Input / output information and the like can be overwritten, updated, or additionally written. The output information or the like may be deleted. The input information or the like may be transmitted to another device.

The determination may be performed by a value represented by 1 bit (0 or 1), may be performed by a true / false value (Boolean: true or false), or may be performed by comparing numerical values (for example, a predetermined value) Comparison with the value).

Each aspect / embodiment described in this specification may be used alone, in combination, or may be switched according to execution. In addition, notification of predetermined information (for example, notification of being “X”) is not limited to explicitly performed, but is performed implicitly (for example, notification of the predetermined information is not performed). Also good.

Software, whether it is called software, firmware, middleware, microcode, hardware description language, or other names, instructions, instruction sets, code, code segments, program codes, programs, subprograms, software modules , Applications, software applications, software packages, routines, subroutines, objects, executable files, execution threads, procedures, functions, etc. should be interpreted broadly.

Further, software, instructions, etc. may be transmitted / received via a transmission medium. For example, software may use websites, servers, or other devices using wired technology such as coaxial cable, fiber optic cable, twisted pair and digital subscriber line (DSL) and / or wireless technology such as infrared, wireless and microwave. When transmitted from a remote source, these wired and / or wireless technologies are included within the definition of transmission media.

The information, signals, etc. described herein may be represented using any of a variety of different technologies. For example, data, commands, commands, information, signals, bits, symbols, chips, etc. that may be referred to throughout the above description are voltages, currents, electromagnetic waves, magnetic fields or magnetic particles, light fields or photons, or any of these May be represented by a combination of

Note that the terms described in this specification and / or terms necessary for understanding this specification may be replaced with terms having the same or similar meaning.

The terms “system” and “network” used in this specification are used interchangeably.

In addition, information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information. . For example, the radio resource may be indicated by an index.

The names used for the above parameters are not limited in any way. Further, mathematical formulas and the like that use these parameters may differ from those explicitly disclosed herein. Since various channels (eg, PUCCH, PDCCH, etc.) and information elements (eg, TPC, etc.) can be identified by any suitable name, the various names assigned to these various channels and information elements are However, it is not limited.

A mobile communication terminal (portable terminal) is a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal by those skilled in the art. , Mobile terminal, wireless terminal, remote terminal, handset, user agent, mobile client, client, or some other appropriate terminology.

As used herein, the terms “determining” and “determining” may encompass a wide variety of actions. “Judgment” and “decision” are, for example, judgment, calculation, calculation, processing, derivation, investigating, searching (looking up) (for example, table , Searching in a database or another data structure), considering ascertaining what is “certain”, “determining”, and the like. In addition, “determination” and “determination” include receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), and access. (accessing) (for example, accessing data in a memory) may be considered as “determined” or “determined”. In addition, “determination” and “decision” are considered as “determination” and “determination” when resolving, selecting, selecting, establishing, comparing May be included. In other words, “determination” and “determination” may include considering some operation as “determination” and “determination”.

The terms “connected”, “coupled”, or any variation thereof, means any direct or indirect connection or coupling between two or more elements and It can include the presence of one or more intermediate elements between two “connected” or “coupled” elements. The coupling or connection between the elements may be physical, logical, or a combination thereof. As used herein, the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples By using electromagnetic energy, such as electromagnetic energy having a wavelength in the region, microwave region, and light (both visible and invisible) region, it can be considered to be “connected” or “coupled” to each other.

As used herein, the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”

In the present specification, when a designation such as “first” or “second” is used, any reference to the element does not generally limit the quantity or order of the elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, a reference to the first and second elements does not mean that only two elements can be employed there, or that in some way the first element must precede the second element.

These terms are similar to the term “comprising” as long as “include”, “including” and variations thereof are used herein or in the claims. It is intended to be comprehensive. Furthermore, the term “or” as used herein or in the claims is not intended to be an exclusive OR.

In this specification, unless there is only one device that is clearly present in context or technically, a plurality of devices are also included.

The present invention uses a management node, a transfer node, and a communication system, and can avoid data relay delay when data is relayed in a plurality of transfer nodes that can be dynamically connected to the communication node. It is to make.

DESCRIPTION OF SYMBOLS 1 ... Communication system 31, 33, 34 ... UE (communication node), 32 ... Server apparatus (communication node) 10, 10A, 10a-10f ... Forwarding node, 20, 20A ... Management node, 104, 203 ... Prediction part 204. Node information transmitting unit.

Claims (10)

1. It is configured to be communicable with a transfer node that performs relay processing of data transmitted and received between a plurality of communication nodes, and is information indicating the transfer node that is communicably connected to each of the plurality of communication nodes. A management node for storing node information referred to at the time of relay processing in a forwarding node,
   For each of the plurality of communication nodes, register information on a future communication partner predicted based on a communication log of data in the node information corresponding to the communication node,
   The node information for each of the plurality of communication nodes is transmitted in advance to the forwarding node corresponding to the information related to the communication partner registered in the node information.
   Management node.
2. The communication node is predicted as the communication partner,
   The node information is transmitted in advance to the forwarding node to which the communication node predicted as the communication partner is connected.
   The management node according to claim 1.
3. The node information is transmitted to the forwarding node when the communication node predicted as the communication partner has started communication connection to the forwarding node.
   The management node according to claim 2.
4. The forwarding node is predicted as the communication partner,
   Transmitting the node information in advance to the forwarding node predicted as the communication partner;
   The management node according to claim 1.
5. Predicting the communication partner based on the communication frequency for each communication partner specified from the communication log,
   The management node according to any one of claims 1 to 4.
6. Predicting the communication partner based on the communication rate for each communication partner specified from the communication log,
   The management node according to any one of claims 1 to 4.
7. Relay of data transmitted and received between the plurality of communication nodes based on the node information received from the management node and configured to be communicably connected to the management node according to any one of claims 1 to 6. Process,
   Forwarding node.
8. For each of the plurality of communication nodes, predict the communication partner based on the communication frequency for each communication partner specified from the communication log of data,
   The forwarding node according to claim 7.
9. For each of the plurality of communication nodes, predicting the communication partner based on the communication ratio for each communication partner specified from the data communication log,
   The forwarding node according to claim 7.
10. A management node according to any one of claims 1 to 6;
    A forwarding node according to any one of claims 7 to 9,
    A communication system including:

Images