Radio communication system, communication terminal, and method for transmitting burst signals

• US 20030040283A1
• Filed: 08/20/2002
• Published: 02/27/2003
• Est. Priority Date: 08/21/2001
• Status: Active Grant

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Otsu, Toru, Kawai, Hiroyuki, Ohkubo, Shinzo
• Granted Patent: US 7,190,967 B2
• Time in Patent Office: Days
• US Class Current: 455/67.11
• CPC Class Codes: H04L 1/0007 by modifying the frame length

Abstract

In a burst signal transmitting/receiving method with transmission availability control, a method is provided for transmitting each burst signal with the transmission unit length appropriate for the transmission path condition at the time. Radio transmission path condition between a transmitting station and a receiving station is measured. A period during which the burst signal is to be transmitted is then determined on the basis of the measured radio transmission path condition. Before transmitted, the length of the burst signal is adjusted such that it is accommodated in such period.

Claims

1. A method for transmitting burst signals in a radio communication system comprising a transmitting station and a receiving station, the transmitting station comprising a measurement part for measuring radio transmission path condition between the transmitting station and the receiving station, wherein:

the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the measured result by the measurement part.

2. The method as claimed in claim 1, wherein:

the transmitting station determines a period during which the burst signal is to be transmitted on the basis of the measured result, and adjusts the signal length of the burst signal to be transmitted on the basis of the length of the determined period.

3. The method as claimed in claim 2, wherein:

the transmitting station adjusts the signal length of the burst signal to be transmitted such that the adjusted burst signal is accommodated within the determined period.

4. The method as claimed in claim 3, wherein:

the transmitting station divides the burst signal to be transmitted into a plurality of signals such that each of the plurality of signals has the length no longer than the length of the determined period.

5. The method as claimed in claim 3, wherein:

the transmitting station combines a plurality of burst signals to be transmitted into one signal such that the signal length of the combined signal is fitted with the determined period.

6. The method as claimed in claim 1, wherein:

the transmitting station selects a transmission unit from a plurality of transmission units having predetermined different lengths on the basis of the measured result, and adjusts the signal length of the burst signal to be transmitted on the basis of the length of the selected transmission unit.

7. The method as claimed in claim 6, wherein:

the transmitting station divides the burst signal to be transmitted into a plurality of signals such that each of the plurality of signals has the length no longer than the length of the selected transmission unit.

8. The method as claimed in claim 6, wherein:

the transmitting station combines a plurality of burst signals to be transmitted into one signal such that the signal length of the combined signal is fitted with the selected transmission unit.

9. The method as claimed in claim 6, wherein:

the transmitting station selects the transmission unit on the basis of the measured result and of at least one of information related to amount of data of the burst signal to be transmitted, information related to transmission waiting time, and data type of information included in the burst signal to be transmitted.

10. The method as claimed in claim 6, wherein:

the transmitting station selects the transmission unit on the basis of at least one of information related to amount of data of the burst signal to be transmitted, information related to transmission waiting time, and data type of information included in the burst signal to be transmitted, regardless of the measured result.

11. The method as claimed in claim 6, wherein:

the transmitting station compares the measured result with a predetermined criteria, and selects the transmission unit on the basis of how many times the compared result changes in a predetermined period.

12. The method as claimed in claim 6, wherein:

the transmitting station selects the transmission unit each time a predetermined time is passed.

13. The method as claimed in claim 6, wherein:

the transmitting station compares the measured result with a predetermined criteria, selects the transmission unit when the number of times in which the compared result changes reaches a predetermined number.

14. The method as claimed in claim 1, wherein:

the transmitting station determines on the basis of the measured result wether the burst signal transmission is available or not, and suspends the transmission, even on the way, when it is determined that the burst signal transmission is unavailable, in order to adjust the signal length of the burst signal to be transmitted.

15. The method as claimed in claim 1, wherein:

the receiving station measures the radio transmission path condition between the transmitting station and the receiving station, and transmits the measured result to the transmitting station; and

the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the measured result received from the receiving station.

16. The method as claimed in claim 1, wherein:

the receiving station measures the radio transmission path condition between the transmitting station and the receiving station, compares the measured result with a predetermined criteria, and transmits the compared result to the transmitting station; and

the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the compared result received from the receiving station.

17. The method as claimed in claim 6, wherein:

the receiving station measures the radio transmission path condition between the transmitting station and the receiving station, compares the measured result with a predetermined criteria, selects the transmission unit from a plurality of transmission units having predetermined different lengths on the basis of the compared result, and transmits the selected transmission unit to the transmitting station; and

the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the length of the selected transmission unit received from the receiving station.

23. The method as claimed in claim 1, wherein:

the transmitting station performs at least one of an encoding process and an interleaving process on the burst signal to be transmitted in units of the burst signal before the adjustment process.

24. The method as claimed in claim 1, wherein:

the transmitting station compares the measured result with a predetermined criteria, and suspends adjusting the signal length of the burst signal to be transmitted when a cycle on which the compared result changes is shorter than a predetermined value or longer than another predetermined value.

25. The method claimed in claim 1, wherein:

the transmitting station adds on the burst signal to be transmitted information to restore the adjustment to it before its transmission.

18. A method for transmitting burst signals in a radio communication system comprising a transmitting station and a receiving station, the transmitting station measuring radio transmission path condition between the transmitting station and the receiving station, wherein:

the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the length of a predetermined transmission unit.

19. The method as claimed in claim 18, wherein:

the transmitting station divides the burst signal to be transmitted into a plurality of signals such that each of the plurality of signals has the length no longer than the predetermined transmission unit.

20. The method as claimed in claim 18, wherein:

the transmitting station combines a plurality of burst signals to be transmitted into one signal such that the signal length of the combined signal is fitted with the predetermined transmission unit.

21. The method as claimed in claim 18, wherein:

the predetermined transmission unit is defined uniquely to a type of data included in the burst signal to be transmitted.

22. The method as claimed in claim 18, wherein:

the predetermined transmission unit is defined uniquely to each transmitting station.

26. A radio communication system comprising a transmitting station and a receiving station, the transmitting station comprising a measurement part for measuring radio transmission path condition between the transmitting station and the receiving station, the transmitting station further comprising:

a transmission availability determination part for determining transmission availability of a burst signal on the basis of the measured result by the measurement part;

a signal length adjustment part for adjusting the signal length of the burst signal to be transmitted; and

a transmission part for transmitting the burst signal, whose signal length is adjusted by the signal length adjustment part, to the receiving station on the basis of the determination by the transmission availability determination part.

27. The radio communication system as claimed in claim 26, the transmitting station further comprising:

a transmission unit length determination part for determining a transmission unit length appropriate for a predetermined criteria, and wherein;

the signal length adjustment part adjusts the signal length of the burst signal to be transmitted on the basis of the transmission unit length determined by the transmission unit length determination part.

31. The radio communication system as claimed in claim 26, wherein:

the signal length adjustment part comprises a division/combination part for dividing or combining the burst signal to be transmitted into a signal or signals that satisfies or satisfy a predetermined criteria.

32. The radio communication system as claimed in claim 26, the transmitting station further comprising:

an information retrieving part for obtaining at least one of information related to amount of data of the burst signal to be transmitted, information related to transmission waiting time, and data type of information included in the burst signal to be transmitted; and

wherein;

the signal length adjustment part adjusts the signal length of the burst signal to be transmitted on the basis of the measured result and the information obtained by the information retrieving part.

33. The radio communication system as claimed in claim 26, the transmitting station further comprising:

an encode/interleave part for performing at least one of encoding and interleaving processes in units of the busrt signal on the burst signal to be transmitted before the signal length adjustment part adjusts its signal length.

28. A radio communication system comprising a transmitting station and a receiving station, the receiving station comprising:

a measurement part for measuring radio transmission path condition between the transmitting station and the receiving station; and

a transmission part for transmitting the measured result by the measurement part to the transmitting station, and the transmitting station comprising;

a signal length adjustment part for adjusting the signal length of a-burst signal to be transmitted;

a transmission availability determination part for determining transmission availability of the burst signal on the basis of the measured result received from the measurement part; and

a transmission part for transmitting the burst signal, whose signal length is adjusted by the signal length adjustment part, to the receiving station on the basis of the determination by the transmission availability determination part.

29. The radio communication system as claimed in claim 28, the receiving station further comprising:

a comparison part for comparing the measured result obtained by the measurement part with a predetermined criteria, and wherein;

the transmission part transmits at least one of the measured result and the compared result obtained by the comparison part to the transmitting station; and

the signal length adjustment part of the transmitting station adjusts the signal length of the burst signal to be transmitted on the basis of the compared result when the compared result is received from the receiving station.

30. The radio communication system as claimed in claim 29, the receiving station further comprising:

a selection part for selecting a transmission unit from a plurality of transmission units having predetermined different lengths on the basis of the compared result obtained from the comparison part, and wherein;

the transmission part transmits at least one of the measured result, the compared result, and the transmission unit selected by the selection part to the transmitting station; and

the signal length adjustment part of the transmitting station adjusts the signal length of the burst signal to be transmitted, when the transmission unit is received from the receiving station, on the basis of the transmission unit.

34. A radio communication system comprising a transmitting station and a receiving station, the transmitting station comprising a measurement part for measuring radio transmission path condition between the transmitting station and the receiving station, the transmitting station further comprising:

a transmission availability determination part for determining transmission availability of the burst signal on the basis of the measured result obtained by the measurement part; and

a transmission part for transmitting the burst signal to be transmitted to the receiving station on the basis of the determination by the transmission availability determination part, and wherein;

the transmission part suspends the burst signal transmission, even on the way, when it is determined that the burst signal transmission is unavailable by the transmission availability determination part.

35. A communication terminal comprising a measurement part for measuring radio transmission path condition between the commucation terminal and an opposing station communicating with it, the communication terminal further comprising:

a transmission availability determination part for determining transmission availability of a burst signal on the basis of the measured result by the measurement part;

a signal length adjustment part for adjusting the signal length of the burst signal to be transmitted; and

a transmission part for transmitting the burst signal, whose signal length is adjusted by the signal length adjustment part, to the opposing station on the basis of the determination by the transmission availability determination part.

36. The communication terminal as claimed in claim 35, the communication terminal further comprising:

a transmission unit length determination part for determining a transmission unit length appropriate for a predetermined criteria, and wherein;

the signal length adjustment part adjusts the signal length of the burst signal to be transmitted on the basis of the transmission unit length determined by the transmission unit length determination part.

37. The communication terminal as claimed in claim 36, wherein:

the signal length adjustment part comprises a division/combination part for dividing or combining the burst signal to be transmitted into a signal or signals that satisfies or satisfy a predetermined criteria.

38. The communication terminal as claimed in claim 36, the communication terminal further comprising:

an information retrieving part for obtaining at least one of information related to amount of data of the burst signal to be transmitted, information related to transmission waiting time, and data type of information included in the burst signal to be transmitted, and wherein;

the signal length adjustment part adjusts the signal length of the burst signal to be transmitted on the basis of the measured result and the information obtained by the information retrieving part.

39. The communication terminal as claimed in claim 36, the communication terminal further comprising:

an encode/interleave part for performing at least one of encoding and interleaving processes in units of the busrt signal on the burst signal to be transmitted before the signal length adjustment part adjusts its signal length.

40. A communication terminal comprising a measurement part for measuring radio transmission path condition between the commucation terminal and an opposing station communicating with it, the communication terminal further comprising:

a transmission part for transmitting the measured result by the measurement part to the opposing station.

41. The communication terminal as claimed in claim 40, the communication terminal further comprising:

a comparison part for comparing the measured result obtained by the measurement part with a predetermined criteria, and wherein;

the transmission part transmits at least one of the measured result and the compared result obtained by the comparison part to the opposing station.

42. The communication terminal as claimed in claim 41, the communication terminal further comprising:

a selection part for selecting a transmission unit from a plurality of transmission units having predetermined different lengths on the basis of the compared result obtained from the comparison part, and wherein;

the transmission part transmits at least one of the measured result, the compared result, and the transmission unit selected by the selection part to the opposing station.

43. A communication terminal comprising a measurement part for measuring radio transmission path condition between the commucation terminal and an opposing station communicating with it, the communication terminal further comprising:

a transmission availability determination part for determining transmission availability of the burst signal on the basis of the measured result obtained by the measurement part; and

a transmission part for transmitting the burst signal to be transmitted to the receiving station on the basis of the determination by the transmission availability determination part, and wherein;

the transmission part suspends the burst signal transmission, even on the way, when it is determined that the burst signal transmission is unavailable by the transmission availability determination part.