Transmitting apparatus, receiving apparatus and information communication method

• US 20080137689A1
• Filed: 01/02/2008
• Published: 06/12/2008
• Est. Priority Date: 07/08/2005
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Seki, Hiroyuki, Suda, Kenji, Jitsukawa, Daisuke, Shiizaki, Kotaro
• Granted Patent: US 7,869,463 B2
• Time in Patent Office: Days
• US Class Current: 370/498
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04L 1/1874 Buffer management
• CPC Class Codes: H04L 1/1887 Scheduling and prioritising arrangements
• CPC Class Codes: H04L 47/10 Flow control; Congestion control
• CPC Class Codes: H04L 47/283 in response to processing delays, e.g. caused by jitter or round trip time [RTT]

Abstract

An information communication method, which is executed on a transmitting side, is provided. The method comprises a first step of transmitting communication data to a receiving side; and a second step of retransmitting the communication data to the receiving side without waiting for an arrival of a negative acknowledgement signal of the communication data, which arrives from the receiving side, or an elapse of a predetermined acknowledgement wait time.

Claims

1. A transmitting apparatus, comprising:

a transmitting unit for transmitting communication data to a receiving apparatus;

a receiving unit for receiving a negative acknowledgement signal or an acknowledgement signal, which is returned for the communication data from the receiving apparatus;

a retransmission controlling unit for making a retransmission of the communication data to the receiving apparatus without waiting for an arrival of the negative acknowledgement signal from the receiving apparatus, or an elapse of a predetermined acknowledgement wait time; and

a retransmission wait time controlling unit for controlling a time interval from a transmission of the communication data to the retransmission.

2. The transmitting apparatus according to claim 1, further comprising

an allocation controlling unit for controlling allocation of wireless resources, wherein

the retransmission of the communication data is made if the wireless resources are available.

3. The transmitting apparatus according to claim 1, wherein

said retransmission controlling unit controls whether or not to make the retransmission, or a plurality of successive retransmissions based on an attribute of the communication data.

4. The transmitting apparatus according to claim 1, further comprising

a predicting unit for predicting an occurrence of a retransmission of the communication data according to a state of a communication with the receiving apparatus, and for controlling whether or not to make the retransmission in said retransmission controlling unit based on a result of prediction.

5. The transmitting apparatus according to claim 1, further comprising

a predicting unit for predicting an occurrence of a retransmission of the communication data based on an occurrence frequency of a retransmission process of past communication data, and for controlling whether or not to make the retransmission in said retransmission controlling unit based on a result of prediction.

6. The transmitting apparatus according to claim 1, further comprising

a predicting unit for predicting an occurrence of a retransmission of the communication data based on a state of an information transmission path to the receiving apparatus, and for controlling whether or not to make the retransmission in said retransmission controlling unit based on a result of prediction.

7. The transmitting apparatus according to claim 1, wherein

said retransmission wait time controlling unit controls a length of the time interval based on at least one of an attribute of the communication data, a state of an information transmission path to the receiving apparatus, and a frequency of a retransmission of past communication data.

8. A receiving apparatus, comprising;

a receiving unit for receiving communication data arriving from a transmitting apparatus;

a transmitting unit for transmitting an acknowledgement signal or a negative acknowledgement signal for the communication data to the transmitting apparatus based on whether or not the communication data is successfully received;

a storing unit for storing a result of a transmission of the acknowledgement signal; and

a control information generating unit for returning the acknowledgement signal to the transmitting apparatus without executing a decoding process of the communication data if the acknowledgement signal is stored in said storing unit, upon receipt of the communication data retransmitted from the transmitting apparatus.

9. The receiving apparatus according to claim 8, further comprising:

a retransmission buffer for holding the communication data from which an error is detected; and

a retransmission synthesizing unit for executing the decoding process of the communication data based on the communication data stored in said retransmission buffer, and the retransmitted communication data if the acknowledgement signal is not stored in said storing unit.

10. An information communication method, which is executed on a transmitting side, comprising:

a first step of transmitting communication data to a receiving side; and

a second step of retransmitting the communication data to the receiving side without waiting for an arrival of a negative acknowledgement signal of the communication data, which arrives from the receiving side, or an elapse of a predetermined acknowledgement wait time.

11. The information communication method according to claim 10, wherein

the communication data is transmitted if wireless resources between the transmitting side and the receiving side are available, in said second step.

12. The information communication method according to claim 10, wherein

a possibility of an occurrence of a request, which is made from the receiving side, to retransmit the communication data transmitted in said first step is predicted, and the communication data is transmitted if the possibility is high and wireless resources between the transmitting side and the receiving side are available, in said second step.

13. The information communication method according to claim 10, wherein

a possibility of an occurrence of a request, which is made from the receiving side, to retransmit the communication data transmitted in said first step is predicted based on an occurrence frequency of a retransmission process of past communication data, and the communication data is transmitted if the possibility is high and wireless resources between the transmitting side and the receiving side are available, in said second step.

14. The information communication method according to claim 10, wherein

a possibility of an occurrence of a request, which is made from the receiving side, to retransmit the communication data transmitted in said first step is predicted based on quality of an information transmission path between the transmitting side and the receiving side, and the communication data is transmitted if the possibility is high and wireless resources between the transmitting side and the receiving side are available, in said second step.

15. The information communication method according to claim 10, wherein

whether or not to retransmit the communication data is determined based on immediacy of the communication data, in said second step.

16. The information communication method according to claim 10, wherein

the communication data is transmitted by a plural number of times based on immediacy of the communication data, in said second step.

17. The information communication method according to claim 10, wherein

a retransmission time interval from a transmission of the communication data in said first step until a retransmission of the communication data in said second step is varied based on quality of an information transmission path between the transmitting side and the receiving side, in said second step.

18. The information communication method according to claim 10, wherein

a retransmission time interval from a transmission of the communication data in said first step until a retransmission of the communication data in said second step is varied based on an occurrence frequency of a retransmission process of past communication data, in said second step.

19. The information communication method according to claim 10, wherein

a retransmission time interval from a transmission of the communication data in said first step until a retransmission of the communication data in said second step is varied based on immediacy of the communication data, in said second step.

20. The information communication method according to claim 10, which is executed on the receiving side, comprising:

a first step of receiving communication data arriving from the transmitting side, and of returning an acknowledgement signal to the transmitting side if the communication data is successfully received, or of returning a negative acknowledgement signal to the transmitting side and storing an acknowledgement result if the communication data is unsuccessfully received; and

a second step of suppressing a decoding process of the communication data, and of returning an acknowledgement signal to the transmitting side if the acknowledgement signal is stored as the acknowledgement result in said first step, upon receipt of the communication data retransmitted from the transmitting side.