Method and apparatus for performing autonomous transmission in a mobile communication system for supporting an enhanced uplink dedicated channel
First Claim
1. A method for performing autonomous transmission in a user equipment (UE) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising the steps of:
- receiving autonomous transmission information indicating k possible autonomous transmission time points within an autonomous transmission period N;
identifying data to be used for non-scheduled transmission; and
transmitting the identified data through the E-DCH at the k possible autonomous transmission time points within the autonomous transmission period N.
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Abstract
A mobile communication system using an enhanced uplink dedicated transport channel transmits data at a relatively low effective data rate through autonomous transmission. Data transmission time points for user equipments (UEs) have different values in the autonomous transmission and therefore uplink interference is reduced. An autonomous transmission period N and the number of autonomous transmissions k are determined such that each UE performs the autonomous transmission. A Node B and each UE are notified of possible autonomous transmission time points based on the determined autonomous transmission period N and the determined number of autonomous transmissions k through signaling. The UE transmits the uplink data without the Node B'"'"'s scheduling at the possible autonomous transmission time points.
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Citations
40 Claims
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1. A method for performing autonomous transmission in a user equipment (UE) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising the steps of:
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receiving autonomous transmission information indicating k possible autonomous transmission time points within an autonomous transmission period N;
identifying data to be used for non-scheduled transmission; and
transmitting the identified data through the E-DCH at the k possible autonomous transmission time points within the autonomous transmission period N. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An apparatus for performing autonomous transmission in a user equipment (UE) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising:
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a receiver for receiving autonomous transmission information indicating k possible autonomous transmission time points within an autonomous transmission period N;
a data buffer for storing data to be transmitted through the E-DCH;
a controller for identifying data to be used for non-scheduled transmission from the data stored in the data buffer; and
a transmitter for transmitting the identified data through the E-DCH at the k possible autonomous transmission time points within the autonomous transmission period N. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method for controlling autonomous transmission of a user equipment (UE) in a radio network controller (RNC) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising the steps of:
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determining an autonomous transmission period N for performing autonomous transmission in the UE, and determining k possible autonomous transmission time points within the autonomous transmission period N by considering an effective data rate for the autonomous transmission; and
transmitting, to the UE, autonomous transmission information indicating the k possible autonomous transmission time points within the determined autonomous transmission period N. - View Dependent Claims (18, 19, 20, 21)
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22. An apparatus for controlling autonomous transmission of a user equipment (UE) in a radio network controller (RNC) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising:
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an autonomous transmission parameter determiner for determining an autonomous transmission period N for performing autonomous transmission in the UE, and determining k possible autonomous transmission time points within the autonomous transmission period N by considering an effective data rate for the autonomous transmission; and
a transmitter for transmitting, to the UE, autonomous transmission information indicating the k possible autonomous transmission time points within the determined autonomous transmission period N. - View Dependent Claims (23, 24, 25, 26)
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27. A method for transmitting uplink data in a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising the steps of:
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transmitting scheduling information about a buffer status indicating an amount of data to be transmitted and uplink transmission power;
receiving at least one of scheduling assignment information based on the scheduling information and autonomous transmission information indicating k possible transmission time points within a transmission period N, where N and k are set in units of E-DCH transmission time intervals (TTIs);
transmitting uplink data according to the scheduling assignment information in mode for Node B controlled scheduling; and
transmitting uplink data at the possible transmission time points according to the autonomous transmission information in autonomous transmission mode. - View Dependent Claims (28, 29, 30, 31, 32, 33)
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34. An apparatus for transmitting uplink data in user equipment (UE) of a mobile communication system for supporting an enhanced uplink dedicated channel (E-DCH), comprising:
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a receiver for receiving at least one of scheduling assignment information based on the scheduling information and autonomous transmission information indicating k possible transmission time points within a transmission period N, where N and k are set in units of E-DCH transmission time intervals (TTIs);
a data buffer for storing uplink data to be transmitted through the E-DCH;
a controller for selecting a Node B controlled scheduling mode or an autonomous transmission mode to transmit the data stored in the data buffer; and
a transmitter for transmitting uplink data according to the scheduling assignment information in the mode for the Node B controlled scheduling, and transmitting uplink data at the possible transmission time points according to the autonomous transmission information in the autonomous transmission mode. - View Dependent Claims (35, 36, 37, 38, 39, 40)
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Specification