METHOD AND APPARATUS FOR DYNAMICALLY ADJUSTING DATA TRANSMISSION PARAMETERS AND CONTROLLING H-ARQ PROCESSES

• US 20090323592A1
• Filed: 08/11/2009
• Published: 12/31/2009
• Est. Priority Date: 06/10/2004
• Status: Active Grant

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Terry, Stephen E.
• Granted Patent: US 8,743,710 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 1/0003 by switching between different modulation schemes
• CPC Class Codes: H04L 1/0007 by modifying the frame length
• CPC Class Codes: H04L 1/0009 by adapting the channel coding H04L1/1812 takes precedence
• CPC Class Codes: H04L 1/0026 Transmission of channel quality indication
• CPC Class Codes: H04L 1/1812 Hybrid protocols; Hybrid automatic repeat request [HARQ]
• CPC Class Codes: H04L 1/1816 with retransmission of the same, encoded, message
• CPC Class Codes: H04L 1/1819 with retransmission of additional or different redundancy
• CPC Class Codes: H04L 1/1835 Buffer management
• CPC Class Codes: H04L 1/1848 Time-out mechanisms
• CPC Class Codes: H04L 1/188 Time-out mechanisms
• CPC Class Codes: H04L 1/1896 ARQ related signaling
• CPC Class Codes: H04L 5/0092 Indication of how the channel is divided
• CPC Class Codes: H04W 28/04 Error control
• CPC Class Codes: H04W 28/14 using intermediate storage
• CPC Class Codes: H04W 28/18 Negotiating wireless communication parameters
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

In a wireless communication system including a wireless transmit/receive unit (WTRU) which transfers data to a Node-B, data transmission parameters such as modulation and coding scheme (MCS) and transport block set (TBS) size are dynamically adjusted on a transmission time interval (TTI) basis, and hybrid-automatic repeat request (H-ARQ) processes used to control the transfer of data between the WTRU and the Node-B are initiated and released, as required. The WTRU transmits and retransmits data to the Node-B through an enhanced uplink (EU) dedicated channel (E-DCH) in accordance with data feedback information received from the Node-B. The WTRU queues data for transmission, and determines a transmission status of the data. The transmission status is set to one of “new transmission,” “successful transmission,” “retransmission” and “restarted transmission.” For each TTI, the WTRU initiates an EU transmission to the Node-B which identifies the assigned H-ARQ process, TBS size and MCS.

Claims

1. A method of dynamically adjusting data transmission parameters for transmission of enhanced dedicated channel (E-DCH) data, the method comprising:

queuing E-DCH data in a buffer;

selecting E-DCH data from the buffer available for transmission;

receiving a message, the message including information specifying a modulation and coding scheme (MCS) and a transport block set (TBS) size;

determining whether or not the selected E-DCH data was previously transmitted; and

selecting a transport block set (TBS) size based on the information in the message on a condition that it is determined that the selected E-DCH data was not previously transmitted.

2. A method of dynamically adjusting data transmission parameters for transmission of enhanced dedicated channel (E-DCH) data, the method comprising:

queuing E-DCH data in a buffer;

selecting E-DCH data from the buffer available for transmission;

deriving information including a modulation and coding scheme (MCS) and a transport block set (TBS) size from a channel quality indicator (CQI);

determining whether or not the selected E-DCH data was previously transmitted; and

selecting a transport block set (TBS) size based on the information in the CQI on a condition that it is determined that the selected E-DCH data was not previously transmitted.

3. The method of claim 2 wherein the CQI represents the maximum allowed interference or transmit power.

4. A method of dynamically adjusting data transmission parameters for transmission of enhanced dedicated channel (E-DCH) data, the method comprising:

queuing E-DCH data in a buffer;

selecting E-DCH data from the buffer available for transmission;

deriving information including a modulation and coding scheme (MCS) and a transport block set (TBS) size from a transport format combination (TFC) index;

determining whether or not the selected E-DCH data was previously transmitted; and

selecting a transport block set (TBS) size based on the information in the TFC index on a condition that it is determined that the selected E-DCH data was not previously transmitted.