Bandwidth allocation device and bandwidth allocation method
A bandwidth allocation device is included in a communication system having a terminal station device and a terminal device and relaying upstream data, which is received from a communication terminal by a lower device connected to the terminal device, to an upper device connected to the terminal station device. The bandwidth allocation device includes a transmission-permitted period start position determining unit configured to estimate a start position of an arrival period in which the upstream data arrives at the terminal device from the lower device; a transmission-permitted period length determining unit configured to estimate a length of the arrival period based on an amount of upstream data to be transmitted from the lower device to the terminal device; and a bandwidth allocation unit configured to allocate a bandwidth to the terminal device based on the estimated start position and the estimated length of the arrival period.
1. A bandwidth allocation device which allocates a bandwidth to a terminal device, the terminal device relays upstream data received from a communication terminal the bandwidth allocation device comprising:
at least one memory configured to store instructions; and
at least one processor configured to execute the instructions to:
receive, from a first device upstream to the bandwidth allocation device, resource information;
specify, from the resource information, a base time for transmitting by a second device the upstream data and an amount of upstream data for a time period during which the second device transmits the upstream data, the second device is downstream to the terminal device; and
allocate to the terminal device, a bandwidth for transmitting by the second device the upstream data on a basis of a time at which the base time and a processing latency spent for internal processing in the second device are added together, and the amount of upstream data.
2. The bandwidth allocation device according to claim 1 ,
wherein the at least one processor is configured to execute the instructions to:
allocate the bandwidth to multiple terminal devices in a distributed manner.
3. The bandwidth allocation device according to claim 1 ,
wherein the at least one processor is configured to execute the instructions to:
derive a traffic pattern; and
allocate the bandwidth to the terminal device on a basis of the traffic pattern.
4. The bandwidth allocation device according to claim 1 ,
wherein the at least one processor is configured to execute the instructions to:
allocate the bandwidth with an overhead amount.
5. The bandwidth allocation device according to claim 1 ,
wherein the bandwidth allocation device is an optical line terminal (OLT) in a passive optical network (PON), and the terminal device is an optical network unit (ONU) in the PON.
6. The bandwidth allocation device according to claim 1 , wherein the processing latency is determined based on a time spent for the internal processing in the second device.
7. The bandwidth allocation device according to claim 1 , wherein the processing latency indicates a time spent for the internal processing in the second device after receiving data.
8. The bandwidth allocation device according to claim 1 , wherein the processing latency is determined based on a time spent for the internal processing caused in the second device.
9. The bandwidth allocation device according to claim 1 , wherein the processing latency corresponds to a difference between receiving and transmitting based on the internal processing.
10. The bandwidth allocation device according to claim 1 , wherein the processing latency is caused by the internal processing in the second device.
11. The bandwidth allocation device according to claim 1 , wherein the processing latency is caused only in the second device.
12. A method executed by a bandwidth allocation device which allocates a bandwidth to a terminal device, the terminal device relays upstream data received from a communication terminal the method comprising:
receiving, from a first device upstream to the bandwidth allocation device, resource information;
specifying, from the resource information, a base time for transmitting by a second device the upstream data and an amount of upstream data for a time period during which the second device transmits the upstream data, the second device is downstream to the terminal device; and
allocating to the terminal device, a bandwidth for transmitting by the second device the upstream data on a basis of a time at which the base time and a processing latency spent for internal processing in the second device are added together, and the amount of upstream data.
13. A bandwidth allocation device which allocates a bandwidth to a terminal device, the terminal device relays upstream data received from a communication terminal, the bandwidth allocation device configured to:
receive, from a first device upstream to the bandwidth allocation device, resource information;
specify, from the resource information, a base time for transmitting by a second device the upstream data and an amount of upstream data for a time period during which the second device transmits the upstream data, the second device is downstream to the terminal device; and
allocate to the terminal device, a bandwidth for transmitting by the second device the upstream data on a basis of a time at which the base time and a processing latency spent for internal processing in the second device are added together, and the amount of upstream data,
wherein the bandwidth allocation device is implemented by:
i) computer executable instructions executed by at least one processor,
ii) at least one circuitry or
iii) a combination of computer executable instructions executed by at least one processor and at least one circuitry.