WO2016158846A1 - 端局装置及び帯域割当方法 - Google Patents
端局装置及び帯域割当方法 Download PDFInfo
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- WO2016158846A1 WO2016158846A1 PCT/JP2016/059878 JP2016059878W WO2016158846A1 WO 2016158846 A1 WO2016158846 A1 WO 2016158846A1 JP 2016059878 W JP2016059878 W JP 2016059878W WO 2016158846 A1 WO2016158846 A1 WO 2016158846A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/44—Star or tree networks
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
- H04W28/18—Negotiating wireless communication parameters
- H04W28/20—Negotiating bandwidth
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0064—Arbitration, scheduling or medium access control aspects
Definitions
- the present invention relates to a terminal station apparatus and a bandwidth allocation method.
- This application claims priority based on Japanese Patent Application No. 2015-068882 for which it applied on March 30, 2015, and uses the content here.
- a radio base station apparatus includes a base station apparatus (BBU: Base Band Unit) and a radio apparatus (RRH: Remote Radio Head) may be provided.
- BBU Base Band Unit
- RRH Remote Radio Head
- the base station device of the radio base station device may include a host device and a terminal device.
- the host device and the terminal device may be aggregated in the base station, and perform baseband processing.
- the wireless device of the wireless base station device performs wireless processing outside the base station without being concentrated in the base station.
- the wireless device is positioned as a lower device relative to the upper device and the terminal device.
- termination devices are connected one-to-one with terminal devices.
- a wireless device that is a subordinate device is connected to a terminal device via a terminal device of a communication system in which the terminal device and a plurality of terminal devices are connected in a one-to-many manner ( (See Patent Document 1).
- LTE and the like have many small cells arranged in the area, thereby efficiently using limited frequency resources and realizing high speed and large capacity.
- a method of accommodating a host device, a terminal device, a termination device, and a lower device via a communication system in which a terminal device and a plurality of termination devices are connected in a one-to-many manner is being studied.
- An example of a communication system in which a terminal device and a plurality of terminal devices are connected in a one-to-many manner is a PON (Passive Optical Network) system (see Non-Patent Document 1).
- Patent Document 1 the uplink communication scheduling information of the user equipment (UE: User Equipment) connected to the lower device is transferred from the higher device to the terminal device, the terminal device, and the lower device in this order. The device is notified. Further, the start time of uplink communication from the terminal device to the terminal device and the amount of signal information are calculated based on the scheduling information of the uplink communication. As a result, the uplink communication signal from the lower apparatus to the upper apparatus according to Patent Document 1 is transferred with low delay.
- UE User Equipment
- the terminal device uses the uplink communication transmission start time of the termination device and the information amount of the signal permitted to transmit uplink communication of the termination device as information on scheduling of uplink communication of a plurality of user devices. It is necessary to calculate based on In this case, the terminal station device needs to grasp the connection relationship of each device of the communication system, such as through which terminal device a plurality of user devices are connected to the terminal device.
- the conventional terminal device does not grasp the connection relationship of each device of the communication system. For this reason, the conventional terminal device has a problem in that it cannot improve the use efficiency of the frequency band of the communication system in which the lower-level devices and the user devices are connected in a one-to-many manner.
- an object of the present invention is to provide a terminal station device and a bandwidth allocation method capable of improving the bandwidth utilization efficiency of a communication system in which a lower-level device and a user device are connected one-to-many. Yes.
- One aspect of the present invention is a terminal device connected to a terminal device connected to a lower device in which a plurality of user devices are accommodated on the lower side, and connected to a higher device on the upper side.
- An information extracting unit that extracts information on allocation of bandwidth of uplink communication for each user device from information on uplink communication of the user device notified from the host device;
- a processing unit for creating correspondence information indicating correspondence between the upper device, the termination device, the lower device, and the user device; Based on the information on the allocation of the uplink communication bandwidth for each user apparatus and the correspondence information, the start time of the uplink communication of the terminal device and the information of the signal permitted to transmit the uplink communication of the terminal device
- a bandwidth allocating unit for allocating an amount to the terminating device; Is a terminal station device.
- the communication device further includes a communication unit that receives, from the termination device, identification information of the lower device connected to the lower level of the termination device,
- the information extraction unit further extracts information indicating an association between the upper device and the lower device from the uplink communication information of the user device notified from the upper device,
- the processing unit creates the correspondence information based on the extracted information indicating the correspondence between the higher-level device and the lower-level device.
- the processing unit obtains information indicating an association between the higher-level device, the lower-level device, and the user device from the higher-level device, and also handles the correspondence between the termination device and the lower-level device from the termination device. Information indicating attachment is obtained, and the correspondence information is created.
- Another aspect of the present invention is a bandwidth allocation method in a terminal device that is connected to a terminal device connected to a lower device in which a plurality of user devices are accommodated on the lower side and is connected to a higher device on the upper side. And Extracting from the upstream communication information of the user device notified from the host device, information on allocation of the bandwidth amount of the upstream communication for each user device; Creating correspondence information indicating correspondence between the upper device, the termination device, the lower device, and the user device; Based on the information on the allocation of the uplink communication bandwidth for each user apparatus and the correspondence information, the start time of the uplink communication of the terminal device and the information of the signal permitted to transmit the uplink communication of the terminal device Assigning a quantity to the end device; Is a bandwidth allocation method.
- the terminal device and the bandwidth allocation method according to the present invention it is possible to improve the bandwidth utilization efficiency of a communication system in which a lower level device and a user device are connected in a one-to-many manner.
- FIG. 1 is a diagram showing a configuration example of a communication system 1 in the first embodiment of the present invention.
- the communication system 1 is a system that communicates using optical signals.
- the communication system 1 includes a host device 10, a terminal device 11, a relay unit 12, a termination device 13 (13-1 to 13-P in the figure), and a lower device 14 (14-1 to 14 in the diagram).
- -P) and user equipment 15 (15-1 to 15-U in the figure).
- the communication system 1 includes a PON (Passive Optical Network) having a terminal station device 11, a terminal device 13, an optical fiber 120 (120-0 and 120-1 to 120-P in the figure), and a relay unit 12. Including.
- PON Passive Optical Network
- the direction from the host device 10 to the user device 15 is referred to as “downward”.
- the direction from the user device 15 to the host device 10 is referred to as “up”.
- the host device 10 functions as a base station device (BBU).
- the higher level device 10 may be connected to another higher level system via the higher level network 20.
- the highest device is the higher device 10.
- the host device 10 and the terminal device 11 are connected one to one.
- the host device 10 transmits the main signal of the downlink communication and the identifier of the destination lower device 14 via the B main signal lines 100 (B is an integer equal to or larger than 1 and the number P of the terminal devices 13). Is transmitted to the terminal device 11.
- the main signal of the downlink communication may include scheduling information (information such as bandwidth allocation) of the uplink communication of the user apparatus 15.
- the host device 10 acquires a main signal for uplink communication from the terminal device 11 via the B main signal lines 100.
- a plurality of host devices 10 may be provided. In this case, each of the plurality of higher-level devices 10 is connected to the terminal device directly or via a line collecting switch.
- the identifier of the lower device 14 is referred to as a “lower device identifier”.
- the identifier is, for example, a MAC (Media Access Control) address or an IP (Internet Protocol) address.
- the lower device identifier may be an identifier uniquely given in an arbitrary range of network.
- the communication line between the terminal device 11 and the terminal device 13 is referred to as a “relay network 30”.
- the host device 10 transmits a sub signal to the terminal device 11 via the sub signal line 101.
- This sub signal includes the lower apparatus identifier of the lower apparatus 14 connected to the upper apparatus 10 via the relay network 30.
- the sub signal also includes an identifier of the user device 15 connected to the lower device 14 (hereinafter referred to as “user device identifier”). Further, the sub-signal may include scheduling information (information such as bandwidth allocation) of the uplink communication of the user apparatus 15.
- the terminal equipment 11 is an optical subscriber line terminal equipment (OLT: Optical Line Terminal).
- OLT optical Subscriber Line Terminal
- the terminal station device 11 and the terminal devices 13-1 to 13-P are connected one-to-many via the optical fiber 120 and the relay unit 12.
- the terminal device 11 and the terminal device 13 may be connected one-to-one via the optical fiber 120 and the relay unit 12.
- the relay unit 12 is an optical splitter.
- the relay unit 12 branches the optical signal received from the terminal device 11 through the optical fiber 120-0 through the optical fibers 120-1 to 120-P and transfers the optical signal to the terminal devices 13-1 to 13-P. . Further, the relay unit 12 transfers the optical signals received from the terminal devices 13-1 to 13-P via the optical fibers 120-1 to 120-P to the terminal device 11. Note that the relay unit 12 may be a multiplexing device that multiplexes or separates optical signals.
- the termination device 13 is an optical line termination device (ONU: Optical Network Unit).
- the terminating device 13-i (i is 1 to P) and the lower device 14-i are connected one-to-one.
- the subordinate device 14 is a communication device, for example, a wireless device.
- the subordinate device 14 and the plurality of user devices 15 are connected in a one-to-many manner.
- the lower device 14 accommodates a plurality of user devices 15.
- the communication line between the lower device 14 and the user device 15 is referred to as a “lower network 40”.
- the user device 15 is a communication device such as a smartphone terminal, a tablet terminal, or a computer terminal.
- the lowest devices are these user devices 15-1 to 15-U (U is an integer of 2 or more).
- FIG. 2 is a diagram illustrating a configuration example of the terminal device 11 in the first embodiment of the present invention.
- the terminal device 11 includes an upper communication unit 110, an information extraction unit 111, a processing unit 112, a storage unit 113, a bandwidth allocation unit 114, and a lower communication unit 115.
- a part or all of the upper communication unit 110, the information extraction unit 111, the processing unit 112, the bandwidth allocation unit 114, and the lower communication unit 115 is stored in a memory by a processor such as a CPU (Central Processing Unit), for example.
- a processor such as a CPU (Central Processing Unit), for example.
- a software function unit that functions by executing a stored program.
- some or all of these functional units may be hardware functional units such as LSI (Large Scale Integration) and ASIC (Application Specific Integrated Circuit).
- the upper communication unit 110 transmits the main signal acquired from the upper device 10 via the main signal lines 100-1 to 100-B (B is an integer equal to or greater than 1 and equal to or less than the number P of the termination devices 13). Forward to the unit 115. That is, the higher-level communication unit 110 is connected to the higher-level device 10 through a B-to-B main signal line. Further, the upper communication unit 110 transfers the main signal acquired from the lower communication unit 115 to the upper device 10 via the main signal lines 100-1 to 100-B.
- the communication unit 110 may extract the uplink communication scheduling information of the user apparatus 15 from the main signal and transfer the extracted information to the information extraction unit 111.
- the upper communication unit 110 performs uplink communication based on the identifier of the upper device 10 added to the upstream communication main signal by the lower device 14 and each corresponding information (described later) stored in the storage unit 113.
- the host device 10 to which the main signal is transferred may be determined.
- the information extraction unit 111 displays the uplink communication scheduling information of the user apparatus 15 on the sub-signal line 101. From the higher-level device 10 via The information extraction unit 111 obtains the information amount of the signal that is permitted to transmit the uplink communication of the user device 15 in the lower network 40 (hereinafter referred to as “subnetwork transmission permission amount”) from the acquired uplink communication scheduling information of the user device 15. Information) is extracted for each user device 15. The information extraction unit 111 associates the user device identifier with the information on the permitted transmission amount of the lower network and transmits it to the band allocation unit 114.
- the information extraction unit 111 also acquires the lower device identifier of the lower device 14 connected to the upper device 10 via the relay network 30 from the upper device 10 via the sub signal line 101.
- the information extraction unit 111 transmits the identifier of the higher-level device 10 (hereinafter referred to as “higher-level device identifier”) and the acquired lower-level device identifier to the processing unit 112.
- the information extraction unit 111 acquires the user apparatus identifier of the user apparatus 15 connected to the lower apparatus 14 that is associated with the lower apparatus identifier from the upper apparatus 10 via the sub signal line 101.
- the information extraction unit 111 transmits the lower device identifier and the user device identifier associated with each other to the processing unit 112.
- the processing unit 112 acquires the identifier of the higher-level device 10 (higher-level device identifier) and the lower-level device identifier from the information extraction unit 111.
- the processing unit 112 requests the termination device 13 via the lower-level communication unit 115 to reply the lower-level device identifier of the lower-level device 14-i connected to the termination device 13-i. That is, the processing unit 112 inquires of the terminal device 13 via the lower communication unit 115 about the lower device identifier of the lower device 14-i connected to the terminal device 13-i.
- the processing unit 112 acquires, from the lower-level communication unit 115, the lower-level device identifier of the lower-level device 14-i connected to the termination device 13-i as a reply from the termination device 13.
- the processing unit 112 associates the higher-level device identifier, the identifier of the termination device 13 that is the inquiry destination (hereinafter referred to as “termination device identifier”), and the answered lower-level device identifier, and causes the storage unit 113 to store them.
- FIG. 3 is a diagram illustrating an example of correspondence information (hereinafter referred to as “lower device correspondence information”) of the higher level device 10, the termination device 13, and the lower level device 14 in the first embodiment.
- the subordinate device correspondence information (BBU-ONU-RRH correspondence information) is information indicating the connection relationship between the host device 10 and the termination device 13 and the connection relationship between the termination device 13 and the subordinate device 14.
- the upper device identifier, the termination device identifier, and the lower device identifier are associated with each other.
- a higher-level device identifier “10”, a termination device identifier “13-1”, and a lower-level device identifier “14-1” are associated with each other. Further, the upper device identifier “10”, the termination device identifier “13-i”, and the lower device identifier “14-i” are associated with each other. Further, the upper device identifier “10”, the termination device identifier “13-P”, and the lower device identifier “14-P” are associated with each other.
- the processing unit 112 determines whether or not the acquired lower device identifier is registered in the lower device correspondence information stored in the storage unit 113. When the lower device identifier acquired from the lower communication unit 115 is not registered, the processing unit 112 associates the lower device identifier acquired from the lower communication unit 115 with the corresponding terminal device 13 and registers it in the lower device etc. correspondence information. To do. On the other hand, when the lower-level device identifier acquired from the lower-level communication unit 115 is registered, the processing unit 112 associates the lower-level device identifier acquired from the lower-level communication unit 115 with the corresponding termination device 13 and associates the lower-level device correspondence information. Update.
- the processing unit 112 also acquires the lower device identifier and the user device identifier associated with each other from the information extraction unit 111.
- the processing unit 112 stores correspondence information (ONU-UE correspondence information) of the terminal device 13 and the user device 15 based on the lower device correspondence information, the lower device identifier and the user device identifier associated with each other, and the storage unit 113 is stored.
- FIG. 4 is a diagram illustrating an example of correspondence information between the terminal device 13 and the user device 15 (hereinafter referred to as “user device correspondence information”) in the first embodiment.
- the user device correspondence information is information indicating a connection relationship between the terminal device 13 and the user device 15.
- the termination device identifier and the user device identifier are associated with each other.
- the terminal device identifier “13-1” is associated with the user device identifier “15-1” associated with the lower device identifier “14-1”. Also, the terminal device identifier “13-1” is associated with the user device identifier “15-u” associated with the lower device identifier “14-1”. That is, the termination device 13-1 is connected to at least the user device 15-1 and the user device 15-u as an example via the lower device 14-1. In FIG. 4, as an example, the terminal device identifier “13-P” is associated with the user device identifier “15-U” associated with the lower device identifier “14-P”.
- the processing unit 112 determines whether or not the acquired user device identifier is registered in the user device correspondence information stored in the storage unit 113. When the user device identifier acquired from the information extraction unit 111 is not registered, the processing unit 112 acquires a termination device corresponding to the lower device identifier acquired from the information extraction unit 111 from the lower device correspondence information, and further information The user device identifier acquired from the extraction unit 111 is associated with the corresponding terminal device 13 and registered in the user device correspondence information.
- the processing unit 112 acquires the termination device corresponding to the lower device identifier acquired from the information extraction unit 111 from the lower device correspondence information, Further, the user device identifier acquired from the information extraction unit 111 is associated with the corresponding terminal device 13 to update the user device correspondence information.
- processing unit 112 may combine the lower device correspondence information and the user device correspondence information in a single correspondence table and store the information in the storage unit 113.
- the storage unit 113 includes, for example, a nonvolatile storage medium (non-temporary recording medium) such as a ROM (Read Only Memory), a flash memory, and an HDD (Hard Disk Drive).
- the storage unit 113 may include, for example, a volatile storage medium such as a RAM (Random Access Memory) or a register.
- the storage unit 113 may store a program for causing the software function unit to function, for example.
- the storage unit 113 stores the lower device correspondence information and the user device correspondence information. Note that the storage unit 113 may store the lower device correspondence information and the user device correspondence information in a single correspondence table.
- the bandwidth allocating unit 114 acquires the lower device correspondence information and the user device correspondence information from the processing unit 112. The bandwidth allocating unit 114 performs the upstream communication of the terminating device 13 in the relay network 30 based on the lower device correspondence information and the user device correspondence information and the lower network transmission permission information extracted by the information extraction unit 111. A required bandwidth amount (hereinafter referred to as “relay network request amount”) is determined. The bandwidth allocating unit 114 calculates the uplink communication signal allocation amount of the lower level device 14 based on the relay network request amount.
- overhead may occur depending on the upstream communication signal of the user device 15.
- the overhead refers to a signal other than the main signal in uplink communication, and is control information added to data transfer, for example. For this reason, the amount of information according to the overhead may be added to or multiplied by the required amount of relay network.
- the bandwidth allocating unit 114 sets the upstream communication transmission start time (relay network transmission permission) so that the termination device 13 waits for the transmission of the uplink communication signal to be fair in all the termination devices 13. Transmission start time).
- the bandwidth allocation unit 114 allocates the uplink communication signal of the lower apparatus 14 so that, for example, the time for which the termination apparatus 13 waits for transmission of the uplink communication signal is fair in all the termination apparatuses 13.
- the information amount hereinafter referred to as “relay network transmission permission amount” of the signal permitted to transmit the uplink communication of the termination device 13 in the relay network 30 is calculated.
- the surplus bit amount here is an additional allocation amount for allowing transmission of a control signal that may occur in uplink communication other than data transfer, for example.
- the bandwidth allocating unit 114 transmits information on the transmission start time of uplink communication for each termination device 13 to the lower communication unit 115.
- the bandwidth allocating unit 114 also transmits information on the permitted amount of relay network transmission for each terminating device 13 to the lower communication unit 115.
- the lower communication unit 115 transfers the main signal of the downlink communication acquired from the upper communication unit 110 to the termination device 13 via the relay network 30.
- the lower communication unit 115 transfers the main signal of the uplink communication acquired from the termination device 13 via the relay network 30 to the upper communication unit 110.
- the lower communication unit 115 acquires information on the transmission start time of uplink communication for each termination device 13 from the band allocation unit 114.
- the lower-level communication unit 115 transfers the information on the transmission start time of the uplink communication of the termination device 13 to the termination device 13 via the relay network 30.
- the lower-level communication unit 115 also acquires information on the permitted amount of relay network transmission for each termination device 13 from the band allocation unit 114.
- the lower-level communication unit 115 transfers the relay network transmission permission amount information for each termination device 13 to the termination device 13 via the relay network 30.
- the lower-level communication unit 115 transfers the downstream communication main signal based on the lower-level device identifier added to the downstream communication main signal by the higher-level device 10 and the corresponding information stored in the storage unit 113.
- a termination device 13 may be defined.
- the lower-level communication unit 115 transfers a signal requesting the lower-level device identifier of the lower-level device 14 to the termination device 13 via the relay network 30.
- the lower communication unit 115 acquires the lower device identifier of the lower device 14-i connected to the termination device 13-i from the termination device 13-i.
- the lower-level communication unit 115 associates the received lower-level device identifier of the lower-level device 14 with the identifier of the termination device 13 and transfers the association to the processing unit 112.
- FIG. 5 is a diagram illustrating a configuration example of the termination device 13 in the first embodiment.
- the termination device 13 includes an upper communication unit 130, an acquisition unit 131, and a lower communication unit 132.
- Part or all of the upper communication unit 130, the acquisition unit 131, and the lower communication unit are software function units that function when a processor such as a CPU executes a program stored in a memory.
- Some or all of these functional units may be hardware functional units such as an LSI or an ASIC.
- the upper communication unit 130 transfers a signal requesting the lower device identifier of the lower device 14 connected to the own device to the acquisition unit 131. Accordingly, the upper communication unit 130 acquires the lower device identifier from the acquisition unit 131. The upper communication unit 130 transmits the lower device identifier of the lower device 14 connected to the own device to the terminal device 11 via the relay network 30.
- the upper communication unit 130 transmits the main signal of the uplink communication to the terminal device 11 at the transmission start time based on the information of the uplink communication transmission start time of the terminal device 13.
- the upper communication unit 130 transmits a main signal of uplink communication adapted to the relay network transmission permission amount to the terminal station device 11 based on the information of the relay network transmission permission amount.
- the upper communication unit 130 also acquires a main signal of downlink communication from the terminal device 11 via the relay network 30.
- the upper communication unit 130 transfers the main signal for downlink communication to the lower communication unit 132.
- the acquisition unit 131 acquires the lower device identifier of the lower device 14 connected to the own device from the lower communication unit 132.
- the acquisition unit 131 transmits the lower device identifier of the lower device 14 connected to the own device to the upper communication unit 130.
- the lower communication unit 132 acquires the lower device identifier of the lower device 14 connected to the own device from the lower device 14.
- the lower communication unit 132 transfers the lower device identifier of the lower device 14 connected to the own device to the acquisition unit 131 in response to a request from the acquisition unit 131.
- the lower communication unit 132 also transfers the main signal of the downlink communication to the lower device 14 connected to the own device.
- FIG. 6 is a sequence diagram illustrating a first example of an operation procedure for creating correspondence information of lower-level devices in the first embodiment.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S101).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S102).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the upper device 10 to the termination device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S103). .
- the terminating device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S104).
- the lower device 14 acquires a signal requesting transmission of the lower device identifier (step S105).
- the lower device 14 transmits the lower device identifier of the own device to the terminal device 13 (step S106).
- the terminating device 13 transmits the terminating device identifier of the own device and the lower device identifier of the lower device 14 connected to the own device to the relay unit 12 (step S107).
- the relay unit 12 transfers the terminal device identifier and the lower device identifier to the terminal device 11 (step S108).
- the terminal device 11 acquires the terminal device identifier and the lower device identifier from the terminal device 13 via the relay unit 12 (step S109).
- the terminal station device 11 determines whether or not the acquired lower device identifier is registered in the lower device correspondence information (BBU-ONU-RRH correspondence information) (step S110).
- the terminal device 11 associates the acquired lower device identifier with the corresponding terminal device 13 and registers it in the lower device correspondence information.
- the terminal station device 11 associates the acquired lower-level device identifier with the corresponding terminal device 13 and updates the lower-level device correspondence information (that is, the lower-level device correspondence). (The correspondence between the lower device identifier and the terminal device identifier in the information is changed) (step S111).
- the terminal device 11 may execute the processing of the terminal device 11 shown in FIG. 6 or periodically execute the processing shown in FIG. 6 due to the information notification and inquiry from the host device 10. May be.
- the terminal device 13 may execute the processing of the terminal device 13 shown in FIG. 6 due to the information notification and inquiry from the terminal device 11 or periodically execute the processing shown in FIG. May be.
- FIG. 7 is a sequence diagram illustrating a second example of an operation procedure for creating correspondence information of lower-level devices in the first embodiment.
- the termination device 13 may execute a request for transmitting the lower device identifier to the lower device 14 in advance and store the lower device identifier.
- the termination device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S201).
- the lower order device 14 acquires a signal for requesting transmission of the lower order device identifier (step S202).
- the lower device 14 transmits the lower device identifier of the own device to the terminal device 13 (step S203).
- the terminating device 13 stores the terminating device identifier of the own device and the lower device identifier of the lower device 14 connected to the own device (step S204).
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S205).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S206).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the upper device 10 to the terminating device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S207). .
- the termination device 13 acquires a signal requesting the lower device identifier of the lower device 14 (step S208).
- the terminating device 13 transmits the terminating device identifier of the own device and the lower device identifier of the lower device 14 connected to the own device (stored in step S204 above) to the relay unit 12 (step S209).
- the relay unit 12 transfers the terminal device identifier and the lower device identifier to the terminal device 11 (step S210).
- the terminal device 11 acquires the terminal device identifier and the lower device identifier from the terminal device 13 via the relay unit 12 (step S211). The terminal device 11 determines whether or not the acquired lower device identifier is registered in the lower device etc. correspondence information (BBU-ONU-RRH correspondence information) (step S212).
- the terminal device 11 associates the acquired lower device identifier with the corresponding terminal device 13 and registers it in the lower device correspondence information.
- the terminal device 11 associates the acquired lower device identifier with the corresponding terminal device 13 and updates the lower device correspondence information (that is, the first example described above). Similarly, the correspondence between the lower device identifier and the terminal device identifier in the lower device correspondence information is changed) (step S213).
- FIG. 8 is a sequence diagram illustrating a third example of an operation procedure for creating correspondence information of lower-level devices in the first embodiment.
- the sequence diagram of FIG. 8 has the same flow as that of FIG. 6, but here, similarly to the relay unit 12, the terminating device 13 also only transfers signals (messages), and the terminal device 11 The lower device 14 communicates directly.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S301).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 in order to transfer the signal to the lower device 14 (step S302).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the termination device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S303). .
- the terminating device 13 also transfers the signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device as it is (step S304).
- the lower device 14 acquires a signal requesting transmission of the lower device identifier (step S305).
- the lower device 14 transmits the lower device identifier of the own device to the terminal device 13 (step S306).
- the terminating device 13 transfers the terminating device identifier of the own device and the lower device identifier of the lower device 14 connected to the own device to the relay unit 12 (step S307).
- the relay unit 12 transfers the terminal device identifier and the lower device identifier to the terminal device 11 (step S308).
- the terminal device 11 acquires the terminal device identifier from the terminal device 13 through the relay unit 12, and acquires the lower device identifier from the lower device 14 through the relay unit 12 and the terminal device 13 (step S309). .
- the terminal device 11 determines whether or not the acquired lower device identifier is registered in the lower device etc. correspondence information (BBU-ONU-RRH correspondence information) (step S310).
- the terminal device 11 associates the acquired lower device identifier with the corresponding terminal device 13 and registers it in the lower device correspondence information.
- the terminal station 11 associates the acquired lower device identifier with the corresponding terminal device 13 and updates the lower device correspondence information (that is, the third example). Also, the correspondence between the lower-level device identifier and the termination device identifier in the lower-level device correspondence information is changed) (step S311).
- FIG. 9 is a sequence diagram illustrating an example of an operation procedure for creating correspondence information of a user device or the like in the first embodiment.
- the host device 10 transmits the lower device identifier of the lower device 14 connected to the higher device 10 and the user device identifier of the user device 15 connected to the lower device 14 to the terminal device 11 via the relay network 30 ( Step S401).
- the terminal station device 11 acquires the lower device identifier of the lower device 14 connected to the higher device 10 and the user device identifier of the user device 15 connected to the lower device 14 via the relay network 30 (step S402).
- the terminal device 11 determines whether or not the acquired user device identifier is registered in the user device correspondence information (step S403). If the acquired user device identifier is not registered, the terminal device 11 acquires a terminal device corresponding to the acquired lower device identifier from the lower device correspondence information, and further acquires the acquired user device identifier. 13 is registered in correspondence information such as a user device. On the other hand, when the acquired user device identifier is registered, the terminal device 11 acquires a terminal device corresponding to the acquired lower device identifier from the lower device correspondence information, and further corresponds to the acquired user device identifier. In association with the terminal device 13, the user device correspondence information is updated (that is, the correspondence relationship between the user device identifier and the terminal device identifier in the user device correspondence information is changed) (step S404).
- the terminal device 11 of the first embodiment is connected to the terminal device 13 connected to the lower device 14 in which a plurality of user devices 15 are accommodated on the lower side, and the upper device 10 is connected to the upper side. It is connected.
- the information extraction unit 111 of the terminal device 11 allocates the bandwidth amount of the uplink communication for each user device 15 from the uplink communication information (for example, scheduling information of the uplink communication) of the user device 15 notified from the host device 10. Extract information.
- the processing unit 112 of the terminal device 11 creates correspondence information indicating correspondence between the upper device 10, the terminal device 13, the lower device 14, and the user device 15.
- the correspondence information may be information indicating the correspondence between the higher-level device 10, the terminal station device 11, the termination device 13, the lower-level device 14, and the user device 15.
- the bandwidth allocating unit 114 of the terminal station device 11 determines the upstream communication start time of the terminal device 13 and the upstream device of the terminal device 13 based on the information on the allocation of the bandwidth amount of the upstream communication for each user device 15 and the correspondence information.
- the amount of information of a signal that is permitted to be transmitted is assigned to the termination device 13.
- the terminal station device 11 creates correspondence information indicating the correspondence between the higher-level device 10, the termination device 13, the lower-level device 14, and the user device 15.
- the terminal device 11 can identify the connection relationship of each device based on the correspondence information.
- the terminal device 11 is permitted to start the uplink communication of the terminal device 13 and to transmit based on the connection relation identification result of each device and the scheduling information for each user device 15 notified from the host device 10. It is possible to determine the amount of information of the signal.
- the terminal station device 11 and the bandwidth allocation method of the first embodiment it is possible to improve the bandwidth utilization efficiency of the communication system in which the lower devices 14 and the user devices 15 are connected in a one-to-many manner. .
- bandwidth allocation to the termination device 13 is performed based on scheduling information from the higher-level device 10 to the lower-level device 14. According to the terminal station device 11 and the bandwidth allocation method of the first embodiment, it is possible to utilize a bandwidth such as PON by signal control to the lower device 14. Therefore, the terminal device 11 and the bandwidth allocation method of the first embodiment can reduce the delay of the uplink communication signal transfer.
- the terminal station device 11 further includes a lower-level communication unit 115 that acquires identification information of the lower-level device 14 connected to the lower level of the termination device 13 from the termination device 13.
- the information extraction unit 111 further extracts information indicating the association between the upper apparatus 10 and the lower apparatus 14 from the scheduling information notified from the upper apparatus 10 as the uplink communication information of the user apparatus 15.
- the processing unit 112 supports the connection between the higher-level device 10, the terminal device 11, the termination device 13, the lower-level device 14, and the user device 15. Create information that shows the relationship.
- the storage unit 113 stores the connection between the higher level device 10, the termination device 13, and the lower level device 14 as information indicating the correspondence between the higher level device 10, the terminal station device 11, the termination device 13, the lower level device 14, and the user device 15. Information indicating the correspondence relationship between the terminal device 13 and the user device 15 is stored.
- the terminal device 11 of the first embodiment can determine the signal transmission start time and transmission permission amount for each terminal device 13 based on scheduling information for each user device 15. Therefore, the terminal device 11 according to the first embodiment can transfer the upstream communication signal and the downstream communication signal to the desired host device 10 and the termination device 13.
- FIG. 10 is a sequence diagram illustrating a first example of an operation procedure when an abnormality occurs in the lower-level device 14 according to the second exemplary embodiment of the present invention.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S501).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S502).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the upper device 10 to the terminating device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S503). .
- the terminating device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S504).
- the lower device 14 acquires a signal requesting transmission of the lower device identifier (step S505).
- the terminating device 13 determines whether or not the lower device identifier (requested transmission) has been acquired from the lower device 14 within a certain time (threshold time) (step S506). If the lower-level device identifier is not acquired from the lower-level device 14 within a predetermined time, the terminating device 13 sends the lower-level device error information indicating that an abnormality has occurred in the lower-level device 14 toward the terminal station device 11 and the relay unit 12. (Step S507). The relay unit 12 transfers the lower device error information to the terminal device 11 (step S508).
- the terminal device 11 acquires the lower device error information from the terminal device 13 via the relay unit 12 (step S509).
- the terminal device 11 determines whether or not the terminating device that has received the lower device error information is registered in the lower device correspondence information (BBU-ONU-RRH correspondence information).
- the terminal device 11 deletes the information associated with the terminal device from the lower device correspondence information (step S510).
- the terminal device 11 also determines whether or not the terminal device that has received the lower device error information is registered in the user device etc. correspondence information (ONU-UE correspondence information). When the terminal device that has received the lower-level device error information is registered, the terminal device 11 deletes the information associated with the terminal device from the user device etc. correspondence information (step S511). Then, the terminal device 11 transmits lower device error information indicating that an abnormality has occurred in the lower device 14 to the upper device 10 (step S512). The upper device 10 acquires lower device error information (step S513).
- FIG. 11 is a sequence diagram illustrating a second example of an operation procedure when an abnormality occurs in the lower level device 14 in the second exemplary embodiment of the present invention.
- the terminating device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S601).
- the lower order device 14 acquires a signal requesting transmission of the lower order device identifier (step S602).
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S603).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S604).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the terminating device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S605). .
- the termination device 13 acquires a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 (step S606).
- the terminating device 13 determines whether or not the lower-level device identifier has been acquired from the lower-level device 14 within a predetermined time (by the above steps S601 and S602) (step S607). If the lower-level device identifier is not acquired from the lower-level device 14 within a predetermined time, the terminating device 13 sends the lower-level device error information indicating that an abnormality has occurred in the lower-level device 14 toward the terminal station device 11 and the relay unit 12. (Step S608). The relay unit 12 transfers the lower device error information to the terminal device 11 (step S609).
- the terminal device 11 acquires the lower device error information from the terminal device 13 via the relay unit 12 (step S610).
- the terminal device 11 determines whether or not the terminating device that has received the lower device error information is registered in the lower device correspondence information (BBU-ONU-RRH correspondence information).
- the terminal device 11 deletes the information associated with the terminal device from the lower device correspondence information (step S611).
- the terminal device 11 also determines whether or not the terminal device that has received the lower device error information is registered in the user device etc. correspondence information (ONU-UE correspondence information). When the terminal device that has received the lower-level device error information is registered, the terminal device 11 deletes the information associated with the terminal device from the user device correspondence information (step S612). Then, the terminal device 11 transmits lower device error information indicating that an abnormality has occurred in the lower device 14 to the upper device 10 (step S613). The upper device 10 acquires lower device error information (step S614).
- correspondence information ONU-UE correspondence information
- FIG. 12 is a sequence diagram showing a third example of the operation procedure when an abnormality occurs in the lower level device 14 in the second embodiment of the present invention.
- the terminal device 13 similarly to the relay unit 12, the terminal device 13 also only transfers a signal (message), and the terminal device 11 and the lower-level device 14 communicate directly.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S701).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 toward the lower device 14 (step S702).
- the relay unit 12 transfers a signal for requesting the lower device identifier of the lower device 14 connected to the upper device 10 to the terminating device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S703).
- the terminating device 13 also transfers the signal requesting transmission of the lower device identifier as it is to the lower device 14 connected to the own device (step S704).
- the lower device 14 acquires a signal requesting transmission of the lower device identifier (step S505).
- the terminal device 11 determines whether or not the lower device identifier has been acquired from the lower device 14 within a certain time (step S706). When the lower-level device identifier is not acquired from the lower-level device 14 within a certain time, the terminal device 11 stores the lower-level device identifier of the lower-level device 14 as the transmission destination in the lower-level device correspondence information (BBU-ONU-RRH correspondence information). It is determined whether or not is registered. When the lower-level device identifier of the transmission-destination lower-level device 14 is registered, the terminal device 11 associates the lower-level device identifier of the transmission-destination lower-level device 14 with the lower-level device identifier of the transmission-destination lower-level device 14. The termination device identifier of the termination device 13 is deleted from the lower device correspondence information (step S707).
- the terminal device 11 also transmits device error information indicating that an abnormality has occurred in the terminal device 13 or the lower device 14 to the upper device 10 (step S708).
- the host device 10 acquires device error information (step S709).
- the terminal device 11 when an abnormality occurs in the lower level device 14, the lower level device identifier of the transmission destination lower level device 14 and the termination device associated with the lower level device identifier. 13 terminal device identifiers are deleted from the lower device correspondence information.
- the terminal station 11 and the bandwidth allocation method of the second embodiment are the same as those in the communication system 1 in which the lower level device 14 and the user device 15 are connected in a one-to-many manner due to an abnormality occurring in the lower level device 14. Even when the device 11 cannot obtain the lower-level device identifier from the terminal device 13, it is possible to improve the bandwidth utilization efficiency.
- the terminal apparatus 11 shows processing when the terminal apparatus 11 cannot acquire the lower-level apparatus identifier from the termination apparatus 13 due to the occurrence of an abnormality in the termination apparatus 13, and this point is the second embodiment. Is different. In the third embodiment, only differences from the second embodiment will be described.
- FIG. 13 is a sequence diagram illustrating a first example of an operation procedure when abnormality occurs in the termination device 13 in the third embodiment of the present invention.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S801).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S802).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the termination device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S803).
- the terminating device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S804).
- the lower device 14 acquires a signal requesting transmission of the lower device identifier (step S805).
- the lower device 14 transmits the lower device identifier of the own device to the terminal device 13 (step S806).
- the terminating device 13 acquires the lower device identifier of the lower device 14 connected to the own device (step S807).
- the terminal device 11 determines whether or not the lower-level device identifier (which has requested transmission) has been acquired from the terminal device 13 within a predetermined time (step S808). If the lower-level device identifier is not acquired from the terminating device 13 within a certain time, the terminal device 11 is associated with the lower-level device correspondence information (BBU-ONU-RRH correspondence information) with the destination terminating device 13. It is determined whether or not the lower device identifier of the lower device 14 is registered.
- the terminal device 11 receives the lower device identifier of the lower device 14 associated with the destination terminal device 13 and Then, the termination device identifier of the destination termination device 13 is deleted from the lower device correspondence information (step S809).
- the terminal device 11 also determines whether or not the lower device identifier of the lower device 14 associated with the destination terminal device 13 is registered in the user device correspondence information (ONU-UE correspondence information). When the lower device identifier of the lower device 14 associated with the destination terminal device 13 is registered, the terminal device 11 receives the lower device identifier of the lower device 14 associated with the destination terminal device 13 and Then, the user device identifier of the user device 15 associated with the lower device identifier is deleted from the user device correspondence information (step S810).
- the terminal device 11 transmits termination device error information indicating that an abnormality has occurred in the termination device 13 to the host device 10 (step S811).
- the host device 10 acquires the terminal device error information (step S812).
- FIG. 14 is a sequence diagram illustrating a second example of an operation procedure when an abnormality occurs in the termination device 13 in the third embodiment of the present invention.
- the termination device 13 transmits a signal requesting transmission of the lower device identifier to the lower device 14 connected to the own device (step S901).
- the lower level device 14 acquires a signal requesting transmission of the lower level device identifier (step S902).
- the lower device 14 transmits the lower device identifier of the own device to the terminal device 13 (step S903).
- the terminating device 13 acquires the lower device identifier of the lower device 14 connected to the own device (step S904).
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S905).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 (step S906).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the terminating device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S907). .
- the termination device 13 acquires a signal requesting the lower device identifier of the lower device 14 (step S908).
- the terminal device 11 determines whether or not the lower-level device identifier has been acquired from the terminal device 13 within a predetermined time (step S909). If the lower-level device identifier is not acquired from the terminating device 13 within a certain time, the terminal device 11 is associated with the lower-level device correspondence information (BBU-ONU-RRH correspondence information) with the destination terminating device 13. It is determined whether or not the lower device identifier of the lower device 14 is registered.
- the terminal device 11 determines the lower-level device identifier of the lower-level device 14 associated with the transmission-destination termination device 13 and the termination-device identifier of the transmission-destination termination device 13 as follows: The information is deleted from the lower device correspondence information (step S910).
- the terminal device 11 also determines whether or not the lower device identifier of the lower device 14 associated with the destination terminal device 13 is registered in the user device correspondence information (ONU-UE correspondence information). When the lower device identifier is registered, the terminal device 11 transmits the lower device identifier of the lower device 14 associated with the transmission destination terminal device 13 and the user device 15 associated with the lower device identifier. The user device identifier is deleted from the user device correspondence information (step S911).
- the terminal device 11 transmits termination device error information indicating that an abnormality has occurred in the termination device 13 to the host device 10 (step S912).
- the host device 10 acquires the terminal device error information (step S913).
- FIG. 15 is a sequence diagram showing a third example of an operation procedure when an abnormality occurs in the termination device 13 in the third embodiment of the present invention.
- the termination device 13 similarly to the relay unit 12, the termination device 13 also only transfers signals (messages), and it is assumed that the terminal device 11 and the lower-level device 14 communicate directly.
- the higher-level device 10 transmits the higher-level device identifier of the higher-level device 10 and the lower-level device identifier of the lower-level device 14 connected to the higher-level device 10 to the terminal station device 11 (step S1001).
- the terminal device 11 transmits a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the relay unit 12 toward the lower device 14 (step S1002).
- the relay unit 12 transfers a signal requesting the lower device identifier of the lower device 14 connected to the higher device 10 to the termination device 13 connected to the lower device 14 to which the lower device identifier is assigned (step S1003).
- the termination device 13 acquires a signal requesting transmission of the lower device identifier. If no abnormality has occurred in the own device, the terminating device 13 transfers the acquired signal to the lower device 14 as it is (step S1004).
- the terminal device 11 determines whether or not the lower device identifier has been acquired from the lower device 14 within a predetermined time (step S1005). When the lower-level device identifier is not acquired from the lower-level device 14 within a certain time, the terminal device 11 stores the lower-level device identifier of the lower-level device 14 as the transmission destination in the lower-level device correspondence information (BBU-ONU-RRH correspondence information). It is determined whether or not is registered. When the lower-level device identifier of the transmission-destination lower-level device 14 is registered, the terminal device 11 associates the lower-level device identifier of the transmission-destination lower-level device 14 with the lower-level device identifier of the transmission-destination lower-level device 14. The termination device identifier of the termination device 13 is deleted from the lower device correspondence information (step S1006).
- the terminal device 11 transmits device error information indicating that an abnormality has occurred in the terminal device 13 or the lower device 14 to the upper device 10 (step S1007).
- the host device 10 acquires device error information (step S1008).
- the terminal device 11 when an abnormality occurs in the terminal device 13, the lower device identifier of the lower device 14 associated with the destination terminal device 13 and the lower device.
- the termination device identifier of the termination device 13 associated with the identifier is deleted from the lower device correspondence information.
- the terminal station device 11 and the bandwidth allocation method of the third embodiment are the same as those in the communication system 1 in which the low-level device 14 and the user device 15 are connected in a one-to-many manner due to the occurrence of an abnormality in the terminal device 13. Even when the device 11 cannot obtain the lower-level device identifier from the terminal device 13, it is possible to improve the bandwidth utilization efficiency.
- the host device, terminal device, terminal device, lower device, user device, and communication system in the above-described embodiments may be realized by a computer.
- a program for realizing this function may be recorded on a computer-readable recording medium, and the program recorded on this recording medium may be read into a computer system and executed.
- the “computer system” includes an OS and hardware such as peripheral devices.
- the “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM or a CD-ROM, and a hard disk incorporated in a computer system.
- the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line.
- a volatile memory inside a computer system serving as a server or a client in that case may be included and a program held for a certain period of time.
- the program may be a program for realizing a part of the above-described functions, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. You may implement
- the terminal device and the bandwidth allocation method according to the present invention it is possible to improve the bandwidth utilization efficiency of a communication system in which a lower level device and a user device are connected in a one-to-many manner.
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Abstract
Description
本願は、2015年3月30日に出願された特願2015-068882号に基づき優先権を主張し、その内容をここに援用する。
無線基地局装置の基地局装置は、上位装置及び端局装置を備える場合がある。上位装置及び端局装置は、基地局に集約される場合があり、ベースバンド処理を実行する。
一方、無線基地局装置の無線装置は、基地局に集約されずに基地局の外で、無線処理を実行する。また、無線装置は、上位装置及び端局装置に対し、下位装置に位置づけられる。
また、一般的な構成では、端局装置に対して終端装置が一対一で接続される。
これに対し、特許文献1では、下位装置である無線装置は、端局装置と複数の終端装置とが一対多で接続された通信システムの終端装置を介して、端局装置と接続されている(特許文献1を参照)。
前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報を抽出する情報抽出部と、
前記上位装置、前記終端装置、前記下位装置及び前記ユーザ装置の対応付けを示す対応情報を作成する処理部と、
前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報と、前記対応情報とに基づいて、前記終端装置の上り通信の開始時刻と、前記終端装置の上り通信の送信が許可される信号の情報量とを、前記終端装置に割り当てる帯域割当部と、
を備える端局装置である。
を更に備え、
前記情報抽出部は、前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記上位装置と前記下位装置との対応付けを示す情報を更に抽出し、
前記処理部は、抽出された前記上位装置と前記下位装置との対応付けを示す情報に基づいて、前記対応情報を作成する。
好適例として、前記処理部は、前記上位装置から、前記上位装置、前記下位装置及び前記ユーザ装置の対応付けを示す情報を入手し、また前記終端装置から、前記終端装置及び前記下位装置の対応付けを示す情報を入手して、前記対応情報を作成する。
前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報を抽出するステップと、
前記上位装置、前記終端装置、前記下位装置及び前記ユーザ装置の対応付けを示す対応情報を作成するステップと、
前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報と、前記対応情報とに基づいて、前記終端装置の上り通信の開始時刻と、前記終端装置の上り通信の送信が許可される信号の情報量とを、前記終端装置に割り当てるステップと、
を有する帯域割当方法である。
[第1の実施形態]
図1は、本発明の第1の実施形態における、通信システム1の構成例を示す図である。
本通信システム1は、光信号によって通信するシステムである。通信システム1は、上位装置10と、端局装置11と、中継部12と、終端装置13(図では、13-1~13-P)と、下位装置14(図では、14-1~14-P)と、ユーザ装置15(図では、15-1~15-U)とを備える。
通信システム1は、一例として、端局装置11と終端装置13と光ファイバ120(図では、120-0及び120-1~120-P)と中継部12とを有するPON(Passive Optical Network)を含む。
本通信システム1では、最上位の装置(上位側の装置)は、上位装置10である。上位装置10と端局装置11とは、一対一で接続されている。上位装置10は、B本(Bは、1以上であり、終端装置13の個数P以下の整数)の主信号線100を介して、下り通信の主信号と、送信先の下位装置14の識別子とを、端局装置11に送信する。
下り通信の主信号は、ユーザ装置15の上り通信のスケジューリングの情報(帯域割当等の情報)を含んでいてもよい。上位装置10は、B本の主信号線100を介して、上り通信の主信号を端局装置11から取得する。なお、上位装置10を複数設けてもよい。この場合、複数の上位装置10はそれぞれ、直接または集線スイッチを介して端局装置と接続される。
下位装置識別子は、任意の範囲のネットワークにて独自に付与される識別子でもよい。以下、端局装置11と終端装置13との間の通信回線を、「中継網30」という。
図1の構成では、端局装置11と、終端装置13-1~13-P(Pは2以上の整数)とは、光ファイバ120と中継部12を介して、一対多で接続されている。しかしながら、端局装置11と、終端装置13とが、光ファイバ120と中継部12を介して、一対一で接続されていても良い。
なお、中継部12は、光信号を多重又は分離する多重化装置でもよい。
終端装置13は、光回線終端装置(ONU: Optical Network Unit)である。終端装置13-i(iは、1~P)と、下位装置14-iとは、一対一で接続されている。
図2は、本発明の第1の実施形態における、端局装置11の構成例を示す図である。端局装置11は、上位通信部110と、情報抽出部111と、処理部112と、記憶部113と、帯域割当部114と、下位通信部115とを備える。
また、上位通信部110は、下位通信部115から取得した主信号を、主信号線100-1~100-Bを介して上位装置10に転送する。
なお、ユーザ装置15の上り通信のスケジューリングの情報(帯域割当等の情報、すなわち、周波数軸及び時間軸について、無線リソースをユーザ装置15ごとに割り振る情報)が主信号に含まれている場合、上位通信部110は、ユーザ装置15の上り通信のスケジューリングの情報を主信号から抽出して、当該抽出した情報を情報抽出部111に転送してもよい。
すなわち、処理部112は、終端装置13-iに接続されている下位装置14-iの下位装置識別子を、下位通信部115を介して、終端装置13に問い合わせる。
下位装置等対応情報(BBU-ONU-RRH対応情報)は、上位装置10と終端装置13との接続関係と、終端装置13及び下位装置14との接続関係とを示す情報である。下位装置等対応情報では、上位装置識別子と、終端装置識別子と、下位装置識別子とが対応付けられている。
下位通信部115から取得した下位装置識別子が登録されていない場合、処理部112は、下位通信部115から取得した下位装置識別子を、対応する終端装置13に関連付けて、下位装置等対応情報に登録する。
一方、下位通信部115から取得した下位装置識別子が登録されている場合、処理部112は、下位通信部115から取得した下位装置識別子を、対応する終端装置13に関連付けて、下位装置等対応情報を更新する。
ユーザ装置等対応情報は、終端装置13とユーザ装置15との接続関係を示す情報である。ユーザ装置等対応情報では、終端装置識別子と、ユーザ装置識別子とが対応付けられている。
また、図4では、一例として、終端装置識別子「13-P」と、下位装置識別子「14-P」に対応付けられたユーザ装置識別子「15-U」とが対応付けられている。
情報抽出部111から取得したユーザ装置識別子が登録されていない場合、処理部112は、情報抽出部111から取得した下位装置識別子に対応する終端装置を、下位装置等対応情報から取得し、さらに情報抽出部111から取得したユーザ装置識別子を、対応する終端装置13に関連付けて、ユーザ装置等対応情報に登録する。
一方、情報抽出部111から取得したユーザ装置識別子が登録されている場合、処理部112は、情報抽出部111から取得した下位装置識別子に対応する終端装置を、下位装置等対応情報から取得し、さらに情報抽出部111から取得したユーザ装置識別子を、対応する終端装置13に関連付けて、ユーザ装置等対応情報を更新する。
帯域割当部114は、中継網要求量に基づいて、下位装置14の上り通信の信号の割当量を算出する。なお、下位装置14における上り通信の信号の転送処理には、ユーザ装置15の上り通信の信号に応じて、オーバヘッドが発生する場合がある。ここでいうオーバヘッドとは、上り通信における主信号以外の信号のことを指し、例えばデータ転送に追加で付加される制御情報である。このため、中継網要求量には、オーバヘッドに応じた情報量等が加算又は乗算されてもよい。
図5は、本第1の実施形態における、終端装置13の構成例を示す図である。終端装置13は、上位通信部130と、取得部131と、下位通信部132とを備える。
上位通信部130と、取得部131と、下位通信部との一部または全部は、例えば、CPU等のプロセッサが、メモリに記憶されたプログラムを実行することにより機能するソフトウェア機能部である。また、これらの機能部のうち一部または全部は、LSIやASIC等のハードウェア機能部であってもよい。
上位通信部130は、この、自装置に接続されている下位装置14の下位装置識別子を、中継網30を介して端局装置11に送信する。
上位通信部130はまた、下り通信の主信号を、中継網30を介して端局装置11から取得する。上位通信部130は、下り通信の主信号を下位通信部132に転送する。
図6は、本第1の実施形態における、下位装置等対応情報を作成する動作の手順の第1例を示すシーケンス図である。
上位装置10は、上位装置10の上位装置識別子と、上位装置10と接続している下位装置14の下位装置識別子とを、端局装置11に送信する(ステップS101)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS102)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS103)。
終端装置13は、自装置の終端装置識別子と、自装置に接続された下位装置14の下位装置識別子とを、中継部12に送信する(ステップS107)。中継部12は、これら終端装置識別子と下位装置識別子とを、端局装置11に転送する(ステップS108)。
図7に示すように、終端装置13は、下位装置識別子の送信の要求を、下位装置14に対して事前に実行し、下位装置識別子を保存していてもよい。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS206)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS207)。
終端装置13は、下位装置14の下位装置識別子を要求する信号を取得する(ステップS208)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置14に向けて転送させるために、中継部12に送信する(ステップS302)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS303)。
終端装置13は、自装置の終端装置識別子と、自装置に接続された下位装置14の下位装置識別子とを、中継部12に転送する(ステップS307)。中継部12は、これら終端装置識別子と下位装置識別子とを、端局装置11に転送する(ステップS308)。
図9は、本第1の実施形態における、ユーザ装置等対応情報を作成する動作の手順の例を示すシーケンス図である。
上位装置10は、中継網30を介して上位装置10と接続する下位装置14の下位装置識別子と、下位装置14と接続するユーザ装置15のユーザ装置識別子とを、端局装置11に送信する(ステップS401)。
端局装置11は、これら、中継網30を介して上位装置10と接続する下位装置14の下位装置識別子と下位装置14と接続するユーザ装置15のユーザ装置識別子とを取得する(ステップS402)。
取得したユーザ装置識別子が登録されていない場合、端局装置11は、取得した下位装置識別子に対応する終端装置を、下位装置等対応情報から取得し、さらに取得したユーザ装置識別子を対応する終端装置13に関連付けて、ユーザ装置等対応情報に登録する。一方、取得したユーザ装置識別子が登録されている場合、端局装置11は、取得した下位装置識別子に対応する終端装置を、下位装置等対応情報から取得し、さらに取得したユーザ装置識別子を対応する終端装置13に関連付けて、ユーザ装置等対応情報を更新する(即ち、ユーザ装置等対応情報における、ユーザ装置識別子と終端装置識別子の対応関係が変更される)(ステップS404)。
端局装置11の情報抽出部111は、上位装置10から通知されたユーザ装置15の上り通信の情報(例えば、上り通信のスケジューリングの情報)から、ユーザ装置15ごとの上り通信の帯域量の割り当ての情報を抽出する。
端局装置11の処理部112は、上位装置10、終端装置13、下位装置14及びユーザ装置15の対応付けを示す対応情報を作成する。対応情報は、上位装置10、端局装置11、終端装置13、下位装置14及びユーザ装置15の対応付けを示す情報でもよい。
端局装置11の帯域割当部114は、ユーザ装置15ごとの上り通信の帯域量の割り当ての情報と、対応情報とに基づいて、終端装置13の上り通信の開始時刻と、終端装置13の上り通信の送信が許可される信号の情報量とを、当該終端装置13に割り当てる。
端局装置11は、各装置の接続関係の識別結果と、上位装置10から通知されるユーザ装置15ごとのスケジューリング情報とに基づいて、終端装置13の上り通信の開始時刻と、送信が許可される信号の情報量とを決定することが可能である。
処理部112は、抽出された上位装置10と下位装置14との対応付けを示す情報に基づいて、上位装置10、端局装置11、終端装置13、下位装置14及びユーザ装置15の接続の対応関係を示す情報を作成する。
記憶部113は、この、上位装置10、端局装置11、終端装置13、下位装置14及びユーザ装置15の接続の対応関係を示す情報として、上位装置10、終端装置13及び下位装置14の接続の対応関係を示す情報と、終端装置13及びユーザ装置15の接続の対応関係を示す情報とを記憶する。
第2の実施形態では、下位装置14に異常が発生したことによって端局装置11が下位装置識別子を終端装置13から取得できない場合の処理を示すものであり、この点が、第1の実施形態と相違する。第2の実施形態では、第1の実施形態との相違点についてのみ説明する。
上位装置10は、上位装置10の上位装置識別子と、上位装置10と接続している下位装置14の下位装置識別子とを、端局装置11に送信する(ステップS501)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS502)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS503)。
下位装置識別子を一定時間以内に下位装置14から取得しなかった場合、終端装置13は、下位装置14に異常が発生したことを示す下位装置エラー情報を、端局装置11に向けて中継部12に送信する(ステップS507)。
中継部12は、上記の下位装置エラー情報を、端局装置11に転送する(ステップS508)。
下位装置エラー情報を受信した終端装置が登録されている場合、端局装置11は、当該終端装置に対応付けられた情報を、下位装置等対応情報から削除する(ステップS510)。
そして端局装置11は、下位装置14に異常が発生したことを示す下位装置エラー情報を、上位装置10に送信する(ステップS512)。上位装置10は、下位装置エラー情報を取得する(ステップS513)。
終端装置13は、自装置に接続された下位装置14に、下位装置識別子の送信を要求する信号を送信する(ステップS601)。下位装置14は、下位装置識別子の送信を要求する信号を取得する(ステップS602)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS604)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS605)。
終端装置13は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を取得する(ステップS606)。
下位装置識別子を一定時間以内に下位装置14から取得しなかった場合、終端装置13は、下位装置14に異常が発生したことを示す下位装置エラー情報を、端局装置11に向けて中継部12に送信する(ステップS608)。
中継部12は、上記の下位装置エラー情報を、端局装置11に転送する(ステップS609)。
下位装置エラー情報を受信した終端装置が登録されている場合、端局装置11は、当該終端装置に対応付けられた情報を、下位装置等対応情報から削除する(ステップS611)。
そして端局装置11は、下位装置14に異常が発生したことを示す下位装置エラー情報を、上位装置10に送信する(ステップS613)。上位装置10は、下位装置エラー情報を取得する(ステップS614)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置14に向けて中継部12に送信する(ステップS702)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS703)。
送信先の下位装置14の下位装置識別子が登録されている場合、端局装置11は、送信先の下位装置14の下位装置識別子と、送信先の下位装置14の下位装置識別子に対応付けられた終端装置13の終端装置識別子とを、下位装置等対応情報から削除する(ステップS707)。
第3の実施形態では、終端装置13に異常が発生したことによって端局装置11が下位装置識別子を終端装置13から取得できない場合の処理を示すものであり、この点が、第2の実施形態と相違する。第3の実施形態では、第2の実施形態との相違点についてのみ説明する。
上位装置10は、上位装置10の上位装置識別子と、上位装置10と接続している下位装置14の下位装置識別子とを、端局装置11に送信する(ステップS801)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS802)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS803)。
終端装置13は、自装置に接続された下位装置14の下位装置識別子を取得する(ステップS807)。
下位装置識別子を一定時間以内に終端装置13から取得しなかった場合、端局装置11は、下位装置等対応情報(BBU-ONU-RRH対応情報)に、送信先の終端装置13に対応付けられた下位装置14の下位装置識別子が登録されているか否かを判定する。
送信先の終端装置13に対応付けられた下位装置14の下位装置識別子が登録されている場合、端局装置11は、送信先の終端装置13に対応付けられた下位装置14の下位装置識別子と、当該送信先の終端装置13の終端装置識別子とを、下位装置等対応情報から削除する(ステップS809)。
送信先の終端装置13に対応付けられた下位装置14の下位装置識別子が登録されている場合、端局装置11は、送信先の終端装置13に対応付けられた下位装置14の下位装置識別子と、この下位装置識別子に対応付けられたユーザ装置15のユーザ装置識別子とを、ユーザ装置等対応情報から削除する(ステップS810)。
終端装置13は、自装置に接続された下位装置14に、下位装置識別子の送信を要求する信号を送信する(ステップS901)。下位装置14は、この、下位装置識別子の送信を要求する信号を取得する(ステップS902)。
これにより、下位装置14は、自装置の下位装置識別子を終端装置13に送信する(ステップS903)。そして、終端装置13は、自装置に接続された下位装置14の下位装置識別子を取得する(ステップS904)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、中継部12に送信する(ステップS906)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS907)。
終端装置13は、下位装置14の下位装置識別子を要求する信号を取得する(ステップS908)。
下位装置識別子を一定時間以内に終端装置13から取得しなかった場合、端局装置11は、下位装置等対応情報(BBU-ONU-RRH対応情報)に、送信先の終端装置13に対応付けられた下位装置14の下位装置識別子が登録されているか否かを判定する。当該下位装置識別子が登録されている場合、端局装置11は、送信先の終端装置13に対応付けられた下位装置14の下位装置識別子と、送信先の終端装置13の終端装置識別子とを、下位装置等対応情報から削除する(ステップS910)。
端局装置11は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置14に向けて中継部12に送信する(ステップS1002)。
中継部12は、上位装置10と接続している下位装置14の下位装置識別子を要求する信号を、下位装置識別子が割り当てられた下位装置14に接続された終端装置13に転送する(ステップS1003)。
終端装置13は、下位装置識別子の送信を要求する信号を取得する。終端装置13は、自装置に異常が発生していない場合には、この取得した信号をそのまま下位装置14に転送する(ステップS1004)。
送信先の下位装置14の下位装置識別子が登録されている場合、端局装置11は、送信先の下位装置14の下位装置識別子と、送信先の下位装置14の下位装置識別子に対応付けられた終端装置13の終端装置識別子とを、下位装置等対応情報から削除する(ステップS1006)。
なお、ここでいう「コンピュータシステム」とは、OSや周辺機器等のハードウェアを含むものとする。また、「コンピュータ読み取り可能な記録媒体」とは、フレキシブルディスク、光磁気ディスク、ROM、CD-ROM等の可搬媒体、コンピュータシステムに内蔵されるハードディスク等の記憶装置のことをいう。
さらに「コンピュータ読み取り可能な記録媒体」とは、インターネット等のネットワークや電話回線等の通信回線を介してプログラムを送信する場合の通信線のように、短時間の間、動的にプログラムを保持するもの、その場合のサーバやクライアントとなるコンピュータシステム内部の揮発性メモリのように、一定時間プログラムを保持しているものも含んでもよい。
また上記プログラムは、前述した機能の一部を実現するためのものであってもよく、さらに前述した機能をコンピュータシステムにすでに記録されているプログラムとの組み合わせで実現できるものであってもよく、FPGA(Field Programmable Gate Array)等のプログラマブルロジックデバイスを用いて実現されるものであってもよい。
10…上位装置
11…端局装置
12…中継部
13…終端装置
14…下位装置
15…ユーザ装置
20…上位網
30…中継網
40…下位網
100…主信号線
101…副信号線
110…上位通信部
111…情報抽出部
112…処理部
113…記憶部
114…帯域割当部
115…下位通信部
120…光ファイバ
130…上位通信部
131…取得部
132…下位通信部
Claims (4)
- 下位側に複数のユーザ装置が収容される下位装置と接続された終端装置と接続され、上位側に上位装置が接続された端局装置において、
前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報を抽出する情報抽出部と、
前記上位装置、前記終端装置、前記下位装置及び前記ユーザ装置の対応付けを示す対応情報を作成する処理部と、
前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報と、前記対応情報とに基づいて、前記終端装置の上り通信の開始時刻と、前記終端装置の上り通信の送信が許可される信号の情報量とを、前記終端装置に割り当てる帯域割当部と、
を備える端局装置。 - 前記終端装置の下位に接続された前記下位装置の識別情報を、前記終端装置から受信する通信部
を更に備え、
前記情報抽出部は、前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記上位装置と前記下位装置との対応付けを示す情報を更に抽出し、
前記処理部は、抽出された前記上位装置と前記下位装置との対応付けを示す情報に基づいて、前記対応情報を作成する、請求項1に記載の端局装置。 - 前記処理部は、前記上位装置から、前記上位装置、前記下位装置及び前記ユーザ装置の対応付けを示す情報を入手し、また前記終端装置から、前記終端装置及び前記下位装置の対応付けを示す情報を入手して、前記対応情報を作成することを特徴とする、請求項1に記載の端局装置。
- 下位側に複数のユーザ装置が収容される下位装置と接続された終端装置と接続され、上位側に上位装置が接続された端局装置における帯域割当方法であって、
前記上位装置から通知された前記ユーザ装置の上り通信の情報から、前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報を抽出するステップと、
前記上位装置、前記終端装置、前記下位装置及び前記ユーザ装置の対応付けを示す対応情報を作成するステップと、
前記ユーザ装置ごとの上り通信の帯域量の割り当ての情報と、前記対応情報とに基づいて、前記終端装置の上り通信の開始時刻と、前記終端装置の上り通信の送信が許可される信号の情報量とを、前記終端装置に割り当てるステップと、
を有する帯域割当方法。
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