Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for selecting an antenna mapping in multiple-input/multiple-output (MIMO) enabled wireless communication networks.SOLUTION: A set (candidate set) to be candidates of antenna mappings available at the point of time is determined based upon measured long term channel conditions. An antenna mapping is selected from the candidate set, and the mapping is calibrated with a selected antenna mapping of a receiving side wireless transmit/receive unit (WTRU). When the selected mappings are calibrated, packet data transmission is started. In an alternative embodiment, a calibration training frame (CTF) is used to calibrate multiple antenna mappings simultaneously or sequentially. Also disclosed are frame formats of a physical layer and a medium access control layer for implementing antenna mapping selection according to this invention.
Abstract:
PROBLEM TO BE SOLVED: To allow retransmission data to avoid delay due to congestion of a transmit buffer.SOLUTION: Constitution of a media access control (MAC) shortens transmission waiting time for re-transmission of data blocks. A plurality of the data blocks are received and temporarily stored in a first memory (815B) (e.g., a queue and a buffer). Thereafter, the plurality of the data blocks are transmitted. Whether reception of the respective transmitted data blocks is successful, or whether the re-transmission of the data blocks is needed because the reception of the data blocks is not successful, is determined. The respective data blocks in which the re-transmissions is needed among the transmitted data blocks are tagged and stored in a second memory (815A), having a higher order of priority than that of the first memory (815B). The tagged data blocks are re-transmitted, before the data blocks stored in a position of the first memory (815B) are transmitted.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for assigning automatic repeat request/hybrid-automatic repeat request (ARQ/H-ARQ) processes in a wireless transmit/receive unit (WTRU) to support enhanced uplink (EU) data transmissions.SOLUTION: After parameters associated with the ARQ/H-ARQ processes are configured, the WTRU assigns an ARQ/H-ARQ process for selected data. After transmitting the data, the WTRU determines whether feedback information for the data has been received (252). The WTRU releases the ARQ/H-ARQ process (254) if an acknowledgement (ACK) message has been received, and retransmits the data (258) if a non-acknowledgement (NACK) message or no feedback information has been received in a predetermined time period while incrementing a transmission counter in the WTRU.
Abstract:
PROBLEM TO BE SOLVED: To support incremental redundancy and allow adaptation of modulation and coding sets in order to provide maximum data rates with minimal H-ARQ transmission failures.SOLUTION: Transport block sets are transmitted with a first specified modulation and coding scheme. Each transport block set is received and a determination is made as to whether the transport block sets meet a specified quality. When the specified quality is not met, a repeat request is transmitted. The specified modulation and coding scheme is changed to a second specified modulation and coding scheme that may support a reduced number of TBSs within a transmission time interval. In response to the repeat request, at least one of the transport block sets is retransmitted. The retransmitted transport block set is received. The retransmitted transport block set may be combined with a corresponding previously received transport block set.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and system for providing support data to a wireless transmit/receive unit (WTRU).SOLUTION: Support data comprises information related to a neighboring access point of an access point. The support data is transmitted to a WTRU using a multicast and/or broadcast type signal system and facilitates a ring and a handover of the WTRU between the access points.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and apparatus for transmission management for multiple polling and power saving in a wireless communication system.SOLUTION: In a wireless communication system comprising at least one access point (AP) and a plurality of stations (STAs), a method for transmission management of a wireless medium comprises the AP configuring a Multiple Receiver Aggregate Multi-Poll/Power Save Aggregation Descriptor (MMP/PSAD) frame with scheduled Uplink Transmission Time (ULT) information for the plurality of STAs. The AP then transmits the MMP/PSAD frame to the plurality of STAs. Upon successfully receiving and decoding the MMP/PSAD frame, STAs perform transmission during their scheduled ULT.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and system for transferring wireless transmit/receive unit (WTRU)-specific information to support enhanced uplink (EU) operation in a wireless communication system.SOLUTION: This radio network controller (RNC) obtains WTRU-specific information and transfers the WTRU-specific information to Node-Bs. Each of the Node-Bs is configured to schedule uplink transmissions from a WTRU and utilizes the WTRU-specific information in operation of EU transmissions.
Abstract:
PROBLEM TO BE SOLVED: To provide a further appropriate resource utilization method in an MBMS.SOLUTION: This invention includes a wireless access network and a method for transmitting multimedia broadcasts/multicast services (MBMS) using channel switching. The channel switching is between dedicated and shared/common channels. The invention also includes MBMS reception scheduling for use when a wireless transmitter/receiver receives an MBMS service from multiple transmission sources. The transmission sources transmitting the MBMS services service data in differing orders. One embodiment uses in-band segmentation information and another embodiment uses out-of-band synchronization information.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for processing data blocks that can acquire normally a transmitted perfect set in a soft handover macro diversity operation. SOLUTION: The method and the apparatus for processing data blocks during soft handover constitute a radio communication system 100 including at least two enhanced uplink soft handover node-B and a radio network controller (RNC). Each Node-B 110 decodes a received data block and forwards the decoded data block to the RNC 105. When the RNC 105 receives at least one copy of a successfully decoded data block, the RNC 105 uses a re-ordering function entity to process the copy of the successfully decoded data block to support in-sequence delivery to higher protocol layers. When the RNC receives two or more copy of a successfully decoded data block, the RNC discards the extra successfully decoded data block copies. COPYRIGHT: (C)2011,JPO&INPIT
Abstract:
PROBLEM TO BE SOLVED: To disclose a method and a device for accessing an uplink random access channel (RACH) based on contention in an SC-FDMA system. SOLUTION: A wireless transmit/receive unit (WTRU) randomly selects a RACH sub-channel and a signature from among a plurality of available RACH sub-channels and signatures. The WTRU transmits a preamble using the selected signature via the selected RACH sub-channel at a transmission power determined in advance or a calculated transmission power. A base station monitors the RACH to detect the preamble. When the signature is detected on the RACH, the base station transmits an acquisition indicator (AI) to the WTRU. When an affirmative acknowledgement reply (ACK) is received, the WTRU transmits the message portion to the base station. When a negative acknowledgment reply (NACK) is received or a reply is not received, the WTRU re-transmits the preamble. COPYRIGHT: (C)2011,JPO&INPIT