Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for dynamically allocating hybrid-automatic repeat request (H-ARQ) processes in a wireless transmit/receive unit (WTRU) for supporting enhanced uplink (EU) transmissions.SOLUTION: H-ARQ processes in a WTRU are reserved for specific transport channels, dedicated channel medium access control flows or logical channels associated with different data transmission priority classes. The WTRU allocates H-ARQ processes from those reserved H-ARQ processes that are available.
Abstract:
PROBLEM TO BE SOLVED: To provide methods for paging in an HSDPA connected mode CELL_PCH or URA-PCH state.SOLUTION: A WTRU is configured: to select various PICH information that is broadcast by a base station by compiling a list of candidate PICHs, and selecting PICH information on the basis of the U-RNTI of the WTRU; and to receive paging messages on the basis of the selected PICH information. In one embodiment, a WTRU receives paging messages on the basis of a PICH, an HS-SCCH, and an HS-PDSCH. In another embodiment, a WTRU receives paging messages on the basis of a PICH and an HS-PDSCH. In both embodiments, a time delay parameter is used so that the WTRU may listen for either the HS-SCCH or HS-PDSCH for a period of time and return to a sleep mode if no paging message is received.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for cooperation in wireless communications.SOLUTION: Cooperation is considered among a number of network elements, including at least one wireless transmit-receive unit, at least one relay station, and at least one base station. The wireless transmit-receive unit transmits channel state information (CSI) and beam-forming information to a plurality of network nodes, and receives beam-formed signals including the same data from each of the plurality of network nodes.
Abstract:
PROBLEM TO BE SOLVED: To disclose a method and apparatus for feedback type signaling error check, detection, and protection in a wireless communication system.SOLUTION: A method of feedback in a wireless transmit receive unit includes: providing a precoding matrix index (PMI); error checking the (PMI) to produce an error check (EC) bit; coding the PMI and the EC bit; and transmitting the coded PMI and EC bit.
Abstract:
PROBLEM TO BE SOLVED: To impart a real state of congestion to an STA (wireless station) from an AP (access point).SOLUTION: An AP generates a service load index and transmits it. The service load index comprises: a BE delay field showing an indication of an average access delay about BE (best effort) frames transmitted between measurement frames, unavailability of a BE service and unavailability of the average access delay about the BE frames; a BK delay field showing a similar indication of BK (background) frames transmitted between the measurement frames; a VI delay field showing a similar indication of VI (video) frames transmitted between the measurement frames; and a VO delay field showing a similar indication of VO (voice) frames transmitted between the measurement frames. An STA receives the service load index as part of single messages from the AP.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a device for efficient precoding matrix verification in a MIMO radio communication system.SOLUTION: A radio transmitting and receiving unit WTRU transmits a precoding matrix index PMI to an eNode B. The eNode B transmits a verification message including a PMI indicator indicating whether the PMI of the WTRU and the PMI of the eNode B are the same or not. If the PMI of the WTRU and the PMI of the eNode B are the same, the eNode B only transmits the PMI indicator, and if not, the eNode B transmits the PMI indicator and the PMI of the eNode B to the WTRU. The eNode B can transmit multiple PMIs at the same time, and can divide the PMIs into multiple groups. Accordingly, a PMI adequacy verification message can be signaled to the WTRU by use of control signaling or a dedicated reference signal.
Abstract:
PROBLEM TO BE SOLVED: To resolve problems that a hidden node situation would arise in a wireless LAN, resulting in degraded capacity, and that hidden nodes phenomena across BSSs may also occur, and that, for the optimization to work properly, coordination and adjustment between the WTRUs are needed to allow gathering all the required information at the node making the decision on the setting of the deferral parameters.SOLUTION: A deferral management method is implemented in a wireless local area network (WLAN) including an access point (AP) and a plurality of wireless transmit/receive units (WTRUs). The AP sends a deferral management capabilities request message to the WTRUs to determine the deferral management capabilities of the WTRUs. In response, each of the WTRUs sends a deferral management capabilities indicator message to the AP. The AP may also send a deferral management parameter set message to the WTRUs to indicate values for setting deferral management parameters. In response, each of the WTRUs may optionally send a deferral management parameter set execution confirmation message to the AP.
Abstract:
PROBLEM TO BE SOLVED: To solve the problem that a channel must be invariable ranging over a subcarrier to be combined.SOLUTION: Provided are a method and a device for combining space frequency block coding (SFBC), spatial multiplexing (SM), and beam formation in a multi-input multi-output (MIMO) orthogonal frequency division multiple (OFDM) system. This system includes a transmitter 110 equipped with a plurality of transmission antennas 126, and a receiver 130 equipped with a plurality of receiving antennas 128. The transmitter generates at least one data stream and a plurality of spatial streams. The number of generated spatial streams depends on the number of transmission antennas 126 and the number of receiving antennas 128. The transmitter 110 determines a transmission system according to at least one of the SFBC, SM, and beam formation. The transmitter 110 transmits the data of data streams to the receiver 130 on the basis of the selected transmission system.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for transmitting and receiving a packet via HSDPA.SOLUTION: A method for receiving a packet via high speed downlink packet access (HSDPA) comprises steps of: receiving a plurality of HSDPA medium access control (MAC-hs) protocol data units (PDUs) each of which comprises at least one segment of a MAC-hs service data unit (SDU); storing segments of the MAC-hs SDU for reassembly; setting a timer that is set every time a segment that is part of the MAC-hs SDU is received; and discarding the stored segments of the MAC-hs SDU on a condition that the timer expires before at least one of the segments of the MAC-hs SDU has been received.