Abstract:
A method and apparatus for uplink transmission is disclosed. A wireless transmit/receive unit (WTRU) transmits a message to a Node-B, wherein the message is selected from at least a first type, a second type, and a third type. The first type of message indicates that the WTRU has uplink buffered data to transmit and the WTRU requires uplink resources for transmission of uplink data. The second type of message includes a plurality of indications, wherein each indication indicates an amount of uplink buffered data associated with at least one logical channel, wherein each logical channel is associated with a priority. The third type of message indicates an amount of uplink buffered data and has less information than the second type of message.
Abstract:
A method and apparatus for transmitting enhanced uplink (EU) data is disclosed. Configuration parameters for EU operation are received, including a priority associated with each MAC-d flow and a maximum number of H-ARQ transmissions associated with each MAC-d flow. A H-ARQ process to use for transmission for a next TTI is identified. On a condition that the identified H-ARQ process is available for new data for the next TTI, data is selected for transmission over the EU channel based on MAC-d flow priority, a transmission status is set to indicate a new transmission, and the selected data is transmitted in accordance with the identified H-ARQ process. On a condition that the identified H-ARQ process is not available for new data for the next TTI, the transmission status is set to indicate a retransmission, and data associated with the identified H-ARQ process is retransmitted.
Abstract:
In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.
Abstract:
A method for processing enhanced dedicated channel data in a wireless transmit/receive unit is described. An interrupt message is received at a medium access control (MAC) layer. The interrupt message is processed by the MAC layer, including at least one of: performing grant processing, on a condition that a grant is included in the interrupt message; obtaining buffer occupancy information; performing transport format combination recovery and elimination; generating a rate request; or multiplexing multiple protocol data units (PDUs) into a single MAC-e PDU.
Abstract:
A Node-B sends a polling message to a wireless transmit/receive unit (WTRU). The WTRU sends an uplink synchronization burst in response to the polling message without contention. The Node-B estimates an uplink timing shift based on the synchronization burst and sends an uplink timing adjustment command to the WTRU. The WTRU then adjusts uplink timing based on the uplink timing adjustment command. Alternatively, the Node-B may send a scheduling message for uplink synchronization to the WTRU. The WTRU may send a synchronization burst based on the scheduling message. Alternatively, the WTRU may perform contention-based uplink synchronization after receiving a synchronization request from the Node-B. The WTRU may enter an idle state instead of performing a handover to a new cell when the WTRU moves to the new cell. A discontinuous reception (DRX) interval for the WTRU may be set based on activity of the WTRU.
Abstract:
In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.
Abstract:
In a wireless communication system including a wireless transmit/receive unit (WTRU) and a Node-B, an uplink (UL) scheduling request is transmitted by the WTRU to the Node-B when the WTRU has buffered (user) data to transmit to the Node-B, but needs to have a scheduling grant for UL data transmission. The WTRU determines whether to transmit to the Node-B a short buffer status information message or a full buffer status information message, based on conditions, whereby the buffer status messages are transmitted with either a short-version UL scheduling request or a full-version UL scheduling request.
Abstract:
In a wireless communication system comprising at least one evolved Node-B (eNB) and a plurality of wireless transmit/receive units (WTRUs), a non-contention based (NCB) channel is established, maintained, and utilized. The NCB channel is allocated for use by one or more WTRUs in the system for utilization in a variety of functions, and the allocation is communicated to the WTRUs. The wireless communication system analyzes the allocation of the NCB channel as required, and the NCB channel is reallocated as required.
Abstract:
A method and apparatus for synchronization in an orthogonal frequency division multiplexing (OFDM) network is disclosed. A wireless transmit/receive unit (WTRU) is configured to receive a primary synchronization signal and a secondary synchronization signal from a cell. The primary synchronization signal and the secondary synchronization signal are spaced by a known number of OFDM symbols. The primary synchronization signal and the secondary synchronization signal are received in a same number of subcarriers in their respective OFDM symbol. A location of at least the secondary synchronization signal in the system bandwidth is variable.
Abstract:
In a wireless communication system including a wireless transmit/receive unit (WTRU) and at least one Node-B, a method and apparatus is used to selectively enable reception of at least one downlink (DL) enhanced uplink (EU) signaling channel established between the WTRU and the Node-B(s). During the operation of an enhanced dedicated channel (E-DCH), the WTRU monitors at least one DL EU signaling channel established between the WTRU and the Node-B(s) only when it is necessary, based on the WTRU's knowledge of at least one established standard procedure. The WTRU coordinates and consolidates DL signaling channel reception requirements of a plurality of channel allocation and/or data transmission procedures carried out by the WTRU in accordance with the established standard procedure. The WTRU determines whether to enable reception of at least one specific DL signaling channel based on the consolidated DL signaling channel reception requirements.