| US 7,460,474 B2 | ||
| Packet transmission control apparatus and packet transmission control method | ||
| Hiroyuki Ishii, Yokosuka (Japan); Yoshimasa Imamura, Yokohama (Japan); Akihito Hanaki, Yokohama (Japan); Takehiro Nakamura, Yokosuka (Japan); Shinya Tanaka, Yokohama (Japan); and Masafumi Usuda, Yokosuka (Japan) | ||
| Assigned to NTT DoCoMo, Inc., Tokyo (Japan) | ||
| Filed on Oct. 21, 2004, as Appl. No. 10/969,013. | ||
| Claims priority of application No. 2003-361261 (JP), filed on Oct. 21, 2003. | ||
| Prior Publication US 2005/0141421 A1, Jun. 30, 2005 | ||
| Int. Cl. G01R 31/08 (2006.01); G06F 11/00 (2006.01); G08C 15/00 (2006.01) | ||
| U.S. Cl. 370—230 [370/234; 370/235; 370/236] | 20 Claims |
| 1. A packet transmission control apparatus which performs transmission control of packets to a plurality of mobile stations,
comprising:
an acquirer configured to acquire an average transmission rate of packets to each of the plurality of mobile stations and
a guaranteed transmission rate of the packets; and
a scheduler configured to perform scheduling to transmit packets to a specific mobile station preferentially, when an average
transmission rate of the packets to the specific mobile station approaches the guaranteed transmission rate, wherein
the acquirer is configured to acquire the average transmission rate Rn of the packets to the mobile station #n, the guaranteed
transmission rate Rntarget, a radio condition Rn between the packet transmission control apparatus and the mobile station #n, and predetermined parameters α and β, and
the scheduler is configured to select a mobile station #n to which packets are transmitted based upon a relationship between
Rnα and (Rn−Rntarget)β, wherein α and β are within a range 0≤α,β≤1.
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