Invention Grant
- Patent Title: Rate control method and apparatus for data packet transmission
- Patent Title (中): 用于数据包传输的速率控制方法和装置
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Application No.: US11626704Application Date: 2007-01-24
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Publication No.: US08014334B2Publication Date: 2011-09-06
- Inventor: Jinsock Lee , Kojiro Hamabe
- Applicant: Jinsock Lee , Kojiro Hamabe
- Applicant Address: JP Tokyo
- Assignee: NEC Corporation
- Current Assignee: NEC Corporation
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: GB0311496.4 20030519; JPPCT/JP2004/07137 20040519
- Main IPC: H04W4/00
- IPC: H04W4/00 ; H04W24/00 ; H04W72/00 ; H04B7/216 ; H04J3/18

Abstract:
Base stations control the transmission rate that is used by UE (user equipment) to forward them information. 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 Rnb transmitted by the base station and detected by the UE as Rue 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.
Public/Granted literature
- US20070115892A1 RATE CONTROL METHOD AND APPARATUS FOR DATA PACKET TRANSMISSION Public/Granted day:2007-05-24
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