Rate control method and apparatus for data packet transmission
1 Assignment
0 Petitions
Accused Products
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.
-
Citations
117 Claims
-
1-93. -93. (canceled)
-
94. User equipment in a communication system comprising a base station, the user equipment comprising:
a receiver which receives, from the base station, a rate control command to up, down or keep a maximum transmission rate of the user equipment and receives, from the base station, absolute information by which the maximum transmission rate of the user equipment is determined. - View Dependent Claims (95, 96, 97, 98)
-
99. A base station in a communication system comprising user equipment, the base station comprising:
a transmitter which transmits, to the user equipment, a rate control command to up, down or keep a maximum transmission rate of the user equipment and transmits, to the user equipment, absolute information by which the maximum transmission rate of the user equipment is determined. - View Dependent Claims (100, 101, 102, 103)
-
104. A communication system comprising:
-
user equipment; and
a base station, wherein the user equipment comprising a receiver which receives, from the base station, a rate control command to up, down or keep a maximum transmission rate of the user equipment and receives, from the base station, absolute information by which the maximum transmission rate of the user equipment is determined and the base station comprising a transmitter which transmits the rate control command and the absolute information to the user equipment. - View Dependent Claims (105, 106, 107, 108)
-
-
109. A method for a communication system comprising a base station and user equipment, the method comprising:
-
receiving, at the user equipment, a rate control command to up, down or keep a maximum transmission rate of the user equipment from the base station; and
receiving, at the user equipment, absolute information by which the maximum transmission rate of the user equipment is determined from the base station. - View Dependent Claims (110, 111, 112, 113, 114)
-
-
115. User equipment in a communication system comprising a base station, the user equipment comprising:
-
first means for receiving, from the base station, a rate control command to up, down or keep a maximum transmission rate of the user equipment; and
second means for receiving, from the base station, absolute information by which the maximum transmission rate of the user equipment is determined.
-
-
116. A base station in a communication system comprising user equipment, the base station comprising:
-
first means for transmitting, to the user equipment, a rate control command to up, down or keep a maximum transmission rate of the user equipment; and
second means for transmitting, to the user equipment, absolute information by which the maximum transmission rate of the user equipment is determined.
-
-
117. A communication system comprising:
-
user equipment; and
a base station, wherein the user equipment comprising first means for receiving, from the base station, a rate control command to up, down or keep a maximum transmission rate of the user equipment, and second means for receiving, from the base station, absolute information by which the maximum transmission rate of the user equipment is determined and the base station comprising third means for transmitting the rate control command to the user equipment and fourth means for transmitting the absolute information to the user equipment.
-
Specification