Title:
リンク・アダプテーション
Document Type and Number:
Japanese Patent JP3962405
Kind Code:
B2
Abstract:
The present invention discloses an apparatus and method for adapting a transmission parameter in a transmitting node of a data communication system to the current link quality of a data communication channel. The adapted transmission parameter is selected by the transmitting node from a set of transmission parameters in dependence on a number of successful transmissions. The number of successful transmissions is compared in the transmitting node against one of a first threshold value corresponding to a first state of the transmitting node and a second threshold value corresponding to a second state of the transmitting node. The method comprises in the transmitting node the steps of (a) counting the number of successful transmissions; (b) selecting the adapted transmission parameter (b1) in response to the number of successful transmissions equaling or exceeding the first threshold value when the transmitting node is in the first state, and (b2) in response to the number of successful transmissions equaling or exceeding the second threshold value when the transmitting node is in the second state; and in dependence of the result of a following transmission, operating the transmitting node in one of the first state and the second state.
Inventors:
Yerit, Jens
Nor, Barrett, Andre
Turaon, Hong, Rin
Nor, Barrett, Andre
Turaon, Hong, Rin
Application Number:
JP2004517122A
Publication Date:
August 22, 2007
Filing Date:
June 17, 2003
Export Citation:
Assignee:
INTERNATIONAL BUSINESS MASCHINES CORPORATION
International Classes:
H04L1/16; H04L29/06; H04L1/00; H04L29/08
Foreign References:
| EP1054526A1 | ||||
| EP1195936A1 | ||||
| WO2002025856A1 |
Other References:
Yu-Dong Yao,An effective go-back-N ARQ scheme for variable-error-rate channels,Communications, IEEE Transactions on,IEEE,1995年 1月,Volume 43,Issue 1,pp.20-23
Annamalai, A.,Bhargava, V.K,Analysis and optimization of adaptive multicopy transmission ARQ protocols for time-varying channels,Communications, IEEE Transactions on,IEEE,1998年10月,Volume 46, Issue 10,pp.1356-1368
Annamalai, A.,Bhargava, V.K,Analysis and optimization of adaptive multicopy transmission ARQ protocols for time-varying channels,Communications, IEEE Transactions on,IEEE,1998年10月,Volume 46, Issue 10,pp.1356-1368
Attorney, Agent or Firm:
Hiroshi Sakaguchi
Yoshihiro City
Takeshi Ueno
Yoshihiro City
Takeshi Ueno