摘要:
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.
摘要:
A method implemented in a wireless communication system including a wireless transmit/receive unit (WTRU), a Node-B and a radio network controller (RNC) for quantizing multiplexed data allowed by grants to closely match a selected enhanced uplink transport format combination (E-TFC) transport block size is disclosed. The amount of scheduled and non-scheduled data allowed to be transmitted is quantized so that the amount of data multiplexed into an enhanced uplink (EU) medium access control (MAC-e) protocol data unit (PDU) more closely matches the selected E-TFC transport block size. In an embodiment, the amount of buffered data allowed to be multiplexed by at least one grant, (a serving grant and/or a non-serving grant), is quantized so that the sum of scheduled and non-scheduled data including MAC header and control information multiplexed into a MAC-e PDU more closely matches the selected E-TFC transport block size.
摘要:
A base station, wireless transmit/receive unit, WTRU, and a method implemented by a wireless transmit/receive unit, WTRU, are disclosed. The WTRU receives a discontinuous reception, DRX, configuration in a radio resource control, RRC, message, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and a value for a DRX cycle length transition timer, wherein the second DRX cycle length is a multiple of the first DRX cycle length. The WTRU determines that the DRX cycle length transition timer has expired, and the WTRU transitions from the first DRX cycle length to the second DRX cycle length in response to the WTRU determining that the DRX cycle length transition timer has expired.
摘要:
A base station, wireless transmit/receive unit, WTRU, and a method implemented by a wireless transmit/receive unit, WTRU, are disclosed. The WTRU receives a discontinuous reception, DRX, configuration in a radio resource control, RRC, message, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and a value for a DRX cycle length transition timer, wherein the second DRX cycle length is a multiple of the first DRX cycle length. The WTRU determines that the DRX cycle length transition timer has expired, and the WTRU transitions from the first DRX cycle length to the second DRX cycle length in response to the WTRU determining that the DRX cycle length transition timer has expired.
摘要:
A wireless transmit/receive unit (WTRU) includes a control plane (C-plane) packet data convergence protocol (C-PDCP) layer which performs ciphering of a signaling message. The C-PDCP layer is activated upon power up of the WTRU and initial security parameters are loaded to the C-PDCP layer. An initial connection signaling message and a user identity are ciphered using the initial security parameters even before the WTRU is authenticated. The initial security parameters including a ciphering key (CK) may be generated from system information broadcast from the network. The CK may be a public key for asymmetric encryption, and may be selected from a public key set broadcast by or derived from the network system information. An index of the selected public key may be separately encoded. Alternatively, the index may be communicated by using a Diffie-Hellman key exchange method.
摘要:
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.
摘要:
A method and system for performing handover in a third generation (3G) long term evolution (LTE) system are disclosed. A source evolved Node-B (eNode-B) makes a handover decision based on measurements and sends a handover request to a target eNode-B. The target eNode-B sends a handover response to the source eNode-B indicating that a handover should commence. The source eNode-B then sends a handover command to a wireless transmit/receive unit (WTRU). The handover command includes at least one of reconfiguration information, information regarding timing adjustment, relative timing difference between the source eNode-B and the target eNode-B, information regarding an initial scheduling procedure at the target eNode-B, and measurement information for the target eNode-B. The WTRU then accesses the target eNode-B and exchanges layer 1/2 signaling to perform downlink synchronization, timing adjustment, and uplink and downlink resource assignment based on information included in the handover command.
摘要:
A base station, wireless transmit/receive unit, WTRU, and a method implemented by a wireless transmit/receive unit, WTRU, are disclosed. The WTRU receives a discontinuous reception, DRX, configuration in a radio resource control, RRC, message, the DRX configuration comprising a first DRX cycle length, a second DRX cycle length, and a value for a DRX cycle length transition timer, wherein the second DRX cycle length is a multiple of the first DRX cycle length. The WTRU determines that the DRX cycle length transition timer has expired, and the WTRU transitions from the first DRX cycle length to the second DRX cycle length in response to the WTRU determining that the DRX cycle length transition timer has expired.