Method and apparatus for dynamically adjusting data transmission parameters and controlling H-ARQ processes

• US 8,743,710 B2
• Filed: 08/11/2009
• Issued: 06/03/2014
• 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.
• Primary Examiner(s): NGUYEN, STEVEN H D
• Application Number:
  US12/539,186
• Publication Number:
  US 20090323592A1
• Time in Patent Office: 1,757 Days
• Field of Search: None
• US Class Current: 370/252
• 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 wireless transmit/receive unit (WTRU) comprising:

at least one circuit configured to receive radio resource control (RRC) configuration information from a wireless network, wherein the RRC configuration information indicates for each medium access control for dedicated channel (MAC-d) flow, a limit of a number of hybrid automatic repeat request (HARQ) retransmissions for each MAC-d flow;

wherein the at least one circuit is further configured to generate a medium access control for enhanced dedicated channel (MAC-e) protocol data unit (PDU), wherein the at least one circuit is further configured to transmit the MAC-e PDU using at least one of a plurality of synchronous HARQ processes, wherein each of the plurality of synchronous HARQ processes is configured to retransmit a MAC-e PDU that is not positively acknowledged on a condition that the limit of the number of HARQ retransmissions for a MAC-d flow of the MAC-e PDU is not reached, wherein the HARQ process that was used to previously transmit the MAC-e PDU is used to retransmit the MAC-e PDU; and

wherein the at least one circuit is further configured to transmit with the MAC-e PDU an indication of a transport block size associated with the MAC-e PDU.

2. The WTRU of claim 1 wherein the RRC configuration information further indicates allowed transport block sizes for use in generating the MAC-e PDU, and wherein the transport block size associated with the MAC-e PDU is an allowed transport block size.

3. The WTRU of claim 1 wherein the at least one circuit is further configured to initially transmit the MAC-e PDU with a variable set to zero and to increment the variable for at least one retransmission of the MAC-e PDU.

4. The WTRU of claim 1 wherein the at least one circuit is further configured to select enhanced uplink data for the MAC-e PDU to maximize transmission of highest priority data.

5. A method comprising:

receiving, by a wireless transmit/receive unit (WTRU), radio resource control (RRC) configuration information from a wireless network, wherein the RRC configuration information indicates for each medium access control for dedicated channel (MAC-d) flow, a limit of a number of hybrid automatic repeat request (HARQ) retransmissions for each MAC-d flow;

generating a medium access control for enhanced dedicated channel (MAC-e) protocol data unit (PDU); and

transmitting the MAC-e PDU using at least one of a plurality of synchronous HARQ processes of the WTRU, wherein each of the plurality of synchronous HARQ processes is configured to retransmit a MAC-e PDU that is not positively acknowledged on a condition that the limit of the number of HARQ retransmissions for a MAC-d flow of the MAC-e PDU is not reached, wherein the HARQ process that was used to previously transmit the MAC-e PDU is used to retransmit the MAC-e PDU, and wherein each MAC-e PDU is transmitted with an indication of a transport block size associated with the MAC-e PDU.

6. The method of claim 5 wherein the RRC configuration information further indicates allowed transport block sizes for use in generating the MAC-e PDU;

and wherein the transport block size associated with the MAC-e PDU is an allowed transport block size.

7. The method of claim 5, further comprising:

setting a variable to zero for an initial transmission of the MAC-e PDU, and incrementing the variable for at least one retransmission of the MAC-e PDU.

8. The method of claim 5 further comprising:

selecting enhanced uplink data for the MAC-e PDU to maximize transmission of highest priority data.

9. A Node-B comprising:

at least one circuit configured to transmit a signal including a radio resource control (RRC) configuration information to a wireless transmit/receive unit (WTRU);

wherein the RRC configuration information indicates for each medium access control for dedicated channel (MAC-d) flow, a limit of a number of hybrid automatic repeat request (HARQ) retransmissions for each MAC-d flow;

wherein the at least one circuit is further configured to receive from the WTRU a medium access control for enhanced dedicated channel (MAC-e) protocol data unit (PDU) using at least one of a plurality of synchronous HARQ processes, wherein the at least one circuit is configured to receive a retransmission of the MAC-e PDU, wherein the HARQ process that was used to previously receive the MAC-e PDU is used to receive the retransmission of the MAC-e PDU; and

wherein the at least one circuit is further configured to receive the MAC-e PDU with an indication of a transport block size associated with the MAC-e PDU.

10. The Node-B of claim 9 wherein the at least one circuit is further configured to receive a variable transmitted with the MAC-e PDU from the WTRU, wherein the variable is set to zero to indicate an initial transmission, and wherein the variable is incremented to a non-zero value for retransmissions.