Title:
データパケット伝送のための速度制御方法及び装置
Document Type and Number:
Japanese Patent JP4479924
Kind Code:
B2
Abstract:
Base stations control the transmission rate that is used by UE (user equipment) to forward information to them. A UE periodically forwards a rate request to a base station if the UE needs to have its data transmission rate to the base station increased or decreased, and the base station responds with a rate command. An error can occur in the transmission of the rate command, such that a rate R nb transmitted by the base station and detected by the UE as R ue may not match. Various schemes are proposed for reducing and correcting such transmission errors. A first scheme involves periodically resetting the transmission rate of the base station and UE with a reference rate. Second to fourth schemes involve periodically comparing the transmission rates of the base station and UE, and replacing the rate of the UE if they differ. A fifth scheme involves a filtering of the feedback command in order to reduce the impact of error propagation. A sixth scheme, which may be used separately or in conjunction with any of the foregoing schemes, involves adjusting a power offset with a repetition factor. All of the schemes are modified during a soft handover of the UE from the base station to a new base station.
More Like This:
Inventors:
Engine
Kojiro Hamabe
Kojiro Hamabe
Application Number:
JP2006519166A
Publication Date:
June 09, 2010
Filing Date:
May 19, 2004
Export Citation:
Assignee:
NEC
International Classes:
H04W28/22; H04L1/00; H04L12/56; H04L29/08; H04W52/50; H04W28/04; H04W36/08; H04W36/18; H04W52/40
Domestic Patent References:
| JP2005530425A | ||||
| JP2001197545A | ||||
| JP2000217159A |
Attorney, Agent or Firm:
Akio Miyazaki
Ishibashi Masayuki
Shinichi Iwata
Masaaki Ogata
Ishibashi Masayuki
Shinichi Iwata
Masaaki Ogata