US 12,438,986 B2
Congestion control method, congestion control device, and congestion control program
Masafumi Yoshioka, Musashino (JP); Fumiaki Nagase, Musashino (JP); and Toshifumi Miyagi, Musashino (JP)
Assigned to NTT, Inc., Tokyo (JP)
Appl. No. 18/036,465
Filed by NTT, Inc., Tokyo (JP)
PCT Filed Nov. 11, 2020, PCT No. PCT/JP2020/042152
§ 371(c)(1), (2) Date May 11, 2023,
PCT Pub. No. WO2022/102033, PCT Pub. Date May 19, 2022.
Prior Publication US 2023/0300255 A1, Sep. 21, 2023
Int. Cl. H04M 7/00 (2006.01); H04L 1/00 (2006.01); H04L 47/12 (2022.01); H04L 47/24 (2022.01); H04L 47/28 (2022.01)
CPC H04M 7/0084 (2013.01) [H04L 1/0061 (2013.01); H04L 47/12 (2013.01); H04L 47/24 (2013.01); H04L 47/28 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A congestion control method in an Internet protocol (IP) telephone system, comprising:
acquiring a number of established simultaneous calls on a first line shared by a plurality of IP telephones;
acquiring lengths of call duration of respective calls among the established simultaneous calls; and
setting communication parameters that (i) contribute to communication quality of the respective calls among the established simultaneous calls and (ii) are different from a packet discard ratio based on the number of established simultaneous calls and the lengths of call duration,
wherein the call duration of a first established call among the established simultaneous calls is longer than the call duration of a second established call among the established simultaneous calls, and
wherein setting the communication parameters comprises setting the communication parameters such that the communication quality is deteriorated more as the length of the call duration increases based on the number of simultaneous established calls exceeding a threshold value, including setting the communication parameters of the first established call having the longer duration than the second established call such that a first value indicating the communication quality of the first established call is more deteriorated than the communication quality of the second established call as indicated by a second value.