Abstract:
A method and apparatus for transmitting and receiving a packet via high speed downlink packet access (HSDPA) are disclosed. At least one HSDPA medium access control (MAC-hs) service data unit (SDU) is segmented into a plurality of segments. MAC-hs protocol data units (PDUs) are generated from the segments wherein each MAC-hs PDU includes at least one segment. Each MAC-hs PDU may include one segment from a single MAC-hs SDU. The size of the segments may match to the size of the MAC-hs PDUs minus the size of the header of the MAC-hs PDU. The sizes of the segments may be determined based on the number of segments to which the MAC-hs SDU is segmented. Alternatively, each MAC-hs PDU may include a combination of segments from a plurality of MAC-hs SDUs or a combination of at least one segment from one MAC-hs SDU and at least one entire MAC-hs SDU.
Abstract:
A method and apparatus for controlling discontinuous transmission and reception are disclosed. A Node-B schedules an offset for discontinuous transmission (DTX) and/or discontinuous reception (DRX) for a user equipment (UE) and sends the offset to the UE. The UE then shifts the DTX and/or DRX pattern based on the received offset. The UE may modify the offset based on the transmission time of an activation command for DTX and DRX. The UE may modify an offset for DTX and DRX to shift the DTX pattern and DRX pattern when the UE receives downlink data or transmits uplink data based on a sub-frame number at the time of the downlink reception and uplink transmission.
Abstract:
A method and apparatus for sending a channel quality indication (CQI) via a shared channel while a wireless transmit/receive unit (WTRU) is in a Cell_FACH state without having a dedicated channel allocated for the WTRU are disclosed. A WTRU performs a measurement of at least one parameter and generates a CQI based on the measurement. The WTRU then transmits the CQI via a random access channel (RACH). The CQI may be transmitted using an RACH preamble. A plurality of signature sequences may be divided into a plurality of groups. The WTRU may select one group based on the CQI and randomly select a signature sequence among signature sequences in the selected group for transmitting the RACH preamble. The CQI may be appended to the RACH preamble. The CQI may be transmitted via a control part or a data part of the RACH message.
Abstract:
A method of high speed downlink packet access (HSDPA) link adaptation, comprises receiving at a Node B a channel quality measurement metric over a Measured Results on random access channel (RACH) information element (IE). The link is adapted based upon the received channel quality metric. In addition, a corresponding method at a WTRU is disclosed comprising performing a channel quality metric measurement and transmitting the channel quality metric measurement over a Measured Results on RACH IE to the Node B.
Abstract:
A wireless transmit/receive units (WTRUs) receives a downlink transmission from a Node-B and decodes the downlink transmission. If the decoding is not successful, the WTRU sends a pre-defined burst signifying a negative acknowledgement (NACK) to the Node-B via a contention-based shared feedback channel. The pre-defined burst may be sent only once without requiring an acknowledgement. The Node-B calibrates a downlink transmit power so that the downlink transmission is transmitted to the WTRUs with a high likelihood. The Node-B may send a downlink transmission including multiple data streams processed using different modulation and coding schemes so that a WTRU having a high signal quality decodes all data streams while a WTRU having a low signal quality decodes less than all data streams. The Node-B sends a channel quality indicator (CQI) threshold so that each WTRU determines a data stream to report feedback based on the CQI threshold and a measured CQI.
Abstract:
A method implemented in a wireless transmit/receive unit (WTRU) for transmitting a channel quality indication (CQI) report or other measurement report begins by receiving a trigger. A CQI report is transmitted to a handover target Node B until a stop condition is reached. The WTRU will stop transmitting CQI reports to the target Node B if the stop condition is reached. A WTRU configured to perform the method includes an antenna, a transmitter/receiver connected to the antenna, and a processor communicating with the transmitter/receiver, the processor configured to transmit the CQI report to the handover target Node B.
Abstract:
A VARIETY OF WIRELESS COMMUNICATION METHODS AND APPARATUS FOR SUPPORTING RECONFIGURATION OF RADIO LINK CONTROL, RLC (110, 210) PARAMETERS ARE DISCLOSED. A RADIO RESOURCE CONTROL, RRC RECONFIGURATION MESSAGE IS GENERATED THAT INDICATES THAT AN RLC UNIT IN A WIRELESS TRANSMIT/RECEIVE UNIT, WTRU (100) OR A UNIVERSAL TERRESTRIAL RADIO ACCESS NETWORK, UTRAN SHOULD BE RECONFIGURED FROM SUPPORTING FLEXIBLE SIZE RLC PROTOCOL DATA UNITS, PDUs TO SUPPORTING FIXED SIZE RLC PDUs. IF AN INFORMATION ELEMENT, IE ?ONE SIDED RLC RE-ESTABLISHMENT? IS PRESENT IN THE RRC RECONFIGURATION MESSAGE, ONLY A RECEIVING SIDE SUBASSEMBLY IN THE RLC UNIT IS RE-ESTABLISHED. OTHERWISE, BOTH THE RECEIVING SIDE SUBASSEMBLY AND A TRANSMITTING SIDE SUBASSEMBLY IN THE RLC UNIT ARE RE-ESTABLISHED. FLEXIBLE SIZE RLC PDUs MAY BE DISCARDED AND A MESSAGE INDICATING THE DISCARDED FLEXIBLE SIZE RLC PDUs MAY BE TRANSMITTED. THE FLEXIBLE SIZE RLC PDUs MAY BE MODIFIED SUCH THAT THEY CORRESPOND TO A SET OF PRE-DEFINED SIZES. THE MOST ILLUSTRATIVE DRAWING IS FIG. 1.
Abstract:
A method and apparatus for sending a channel quality indication (CQI) via a shared channel while a wireless transmit/receive unit (WTRU) is in a Cell_FACH state without having a dedicated channel allocated for the WTRU are disclosed. A WTRU performs a measurement of at least one parameter and generates a CQI based on the measurement. The WTRU then transmits the CQI via a random access channel (RACH). The CQI may be transmitted using an RACH preamble. A plurality of signature sequences may be divided into a plurality of groups. The WTRU may select one group based on the CQI and randomly select a signature sequence among signature sequences in the selected group for transmitting the RACH preamble. The CQI may be appended to the RACH preamble. The CQI may be transmitted via a control part or a data part of the RACH message.
Abstract:
A METHOD (200) AND APPARATUS FOR NO-TX MODE FOR A WIRELESS TRANSMIT/RECEIVE UNIT (WTRU) AND NODE B THAT SUSPENDS THE TRANSMISSION OF POWER CONTROL UPDATES (205) AND ASSOCIATED SIGNALING OVER DEDICATED UPLINK AND DOWNLINK CHANNELS. TRIGGERS AND SIGNALS BETWEEN THE WTRU AND NODE B ACTIVATE AND DISABLE NO-TX MODE. A RADIO LINK IS RE-ESTABLISHED TO RESUME DATA TRANSMISSION WHEN NO-TX MODE IS DISABLED, AND DATA MAY ALSO BE TRANSMITTED DURING DEFINED TRANSMISSION OPPORTUNITIES WHILE IN NO-TX MODE. THE MOST ILLUSTRATIVE DRAWING IS