US 8,619,696 B2Granted

Method and apparatus for control of enhanced dedicated channel transmissions

AssigneeInterDigital Technology Corporation

InventorsStephen E. Terry, Guodong Zhang, Kyle Jung-Lin Pan, Peter Shaomin Wang

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Abstract

A method and apparatus for controlling enhanced dedicated channel (E-DCH) transmissions are disclosed. An enhanced uplink medium access control (MAC-e/es) entity processes a received scheduling grant to calculate a serving grant. The MAC-e/es entity determines whether both a hybrid automatic repeat request (H-ARQ) process for scheduled data and scheduled data are available. If an H-ARQ process for scheduled data and scheduled data are available, the MAC-e/es entity determines whether a serving grant exists. The MAC-e/es entity calculates a remaining power based on maximum allowed power and restricts an E-DCH transport format combination (E-TFC) based on the remaining power. The MAC-e/es entity selects an E-TFC using the serving grant and generates a MAC-e protocol data unit. The MAC-e/es entity may process the received scheduled grant is at each transmission time interval or may store the received scheduled grant in a grant list until there is E-DCH data to transmit.

Claims29

Dependent claims

A method, implemented in a wireless transmit/receive unit (WTRU), for controlling enhanced dedicated channel (E-DCH) transmissions, the method comprising:

receiving a plurality of primary absolute grants for E-DCH transmission for an upcoming transmission time interval (TTI);
processing at least one primary absolute grant of the plurality of primary absolute grants to calculate at least one serving grant for E-DCH transmission;
identifying a hybrid automatic repeat request (H-ARQ) process for use for the upcoming TTI;
determining whether the identified H-ARQ process for use for the upcoming TTI is an active H-ARQ process, wherein only an active H-ARQ process is used for transmission of scheduled data and a non-active H-ARQ process is not used for transmission of scheduled data;
determining whether scheduled data is available for transmission in the upcoming TTI;
on a condition that scheduled data is available for transmission and the identified H-ARQ process is an active H-ARQ process and is available for the transmission of the scheduled data in the upcoming TTI:
calculating a remaining power available for the upcoming TTI based on a maximum allowed power for the WTRU;
performing E-DCH transport format combination (E-TFC) restriction based on the remaining power;
selecting an E-TFC from a set of E-TFCs remaining after E-TFC restriction, wherein the E-TFC selection is based on the at least one serving grant;
generating a protocol data unit (PDU) for transmission over an E-DCH in accordance with the selected E-TFC;
and
transmitting the PDU in accordance with the identified H-ARQ process.

9 more elements

A wireless transmit/receive unit (WTRU) including an enhanced uplink medium access control (MAC-e) entity for controlling enhanced dedicated channel (E-DCH) transmissions, the WTRU comprising:

circuitry configured to receive a plurality of primary absolute grants and process at least one primary absolute grant of the plurality of primary absolute grants to calculate at least one serving grant for E-DCH transmission for an upcoming transmit time interval (TTI);
circuitry configured to identify a hybrid automatic repeat request (H-ARQ) process for use for the upcoming TTI;
circuitry configured to determine whether the identified H-ARQ process for use for the upcoming TTI is an active H-ARQ process, wherein only an active H-ARQ process is used for transmission of scheduled data and a non-active H-ARQ process is not used for transmission of scheduled data;
circuitry configured to determine whether scheduled data is available for transmission in the upcoming TTI;
on a condition that scheduled data is available for transmission and the identified H-ARQ process is an active H-ARQ process and is available for the transmission of the scheduled data in the upcoming TTI:
the WTRU further comprises:
circuitry configured to calculate a remaining power available for the upcoming TTI based on a maximum allowed power;
circuitry configured to perform E-DCH transport format combination (E-TFC) restriction based on the remaining power;
circuitry configured to select an E-TFC from a set of E-TFCs remaining after E-TFC restriction, wherein the E-TFC selection is based on the at least one serving grant;
circuitry configured to generate a MAC-e protocol data unit (PDU) for transmission over an E-DCH in accordance with the selected E-TFC;
and
circuitry configured to transmit the MAC-e PDU in accordance with the identified H-ARQ process.

9 more elements

Dependencies are inferred from the claim text.