Method and apparatus to reduce radio resource overhead associated with intermittent traffic
A method and apparatus for No-TX mode for a wireless transmit/receive unit (WTRU) and Node B that suspends the transmission of power control updates and associated signaling over dedicated uplink and downlink channels. Triggers and signals between the WTRU and Node B to 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.
1. A method for use in a wireless transmit/receive unit (WTRU) in an idle mode for transmitting over an enhanced dedicated channel (E-DCH), the method comprising:
determining a power transmission level for a transmission burst;
transmitting the transmission burst at the determined power transmission level;
receiving an acquisition indication and a resource assignment from a Node B in response to the transmission burst, wherein the resource assignment includes an assigned E-DCH resource;
transmitting data using the assigned E-DCH resource; and
releasing the assigned E-DCH resource on a condition that the WTRU receives a release command from the Node B on an E-DCH Absolute Grant Channel (E-AGCH).
2. The method of claim 1 , further comprising:
receiving, from the Node B, the E-DCH Absolute Grant Channel (E-AGCH) with an enhanced Radio Network Temporary Identifier (E-RNTI) that identifies the WTRU.
3. The method of claim 1 , further comprising:
releasing the assigned E-DCH resource on a condition that the WTRU has no data to send.
4. The method of claim 1 , further comprising:
releasing the assigned E-DCH resource on a condition that a predetermined period of time has elapsed since receiving the assigned E-DCH resource.
5. The method of claim 1 , further comprising:
re-transmitting the transmission burst at a new power transmission level on a condition that the acquisition indication is not received within a predetermined period of time.
6. A wireless transmit/receive unit (WTRU) in an idle mode configured to transmit over an enhanced dedicated channel (E-DCH), the WTRU comprising:
a processor configured to determine a power transmission level for a transmission burst;
a transmitter configured to transmit the transmission burst at the determined power transmission level;
a receiver configured to receive an acquisition indication and a resource assignment from a Node B in response to the transmission burst, wherein the resource assignment includes an assigned E-DCH resource;
the transmitter configured to transmit data using the assigned E-DCH resource; and
the processor, the transmitter, and the receiver configured to release the assigned E-DCH resource on a condition that the WTRU receives a release command from the Node B on an E-DCH Absolute Grant Channel (E-AGCH).
7. The WTRU of claim 6 , wherein the receiver is further configured to receive, from the Node B, the E-DCH Absolute Grant Channel (E-AGCH) with an enhanced Radio Network Temporary Identifier (E-RNTI) that identifies the WTRU.
8. The WTRU of claim 6 , wherein the processor, the transmitter, and the receiver are further configured to release the assigned E-DCH resource on a condition that the WTRU has no data to send.
9. The WTRU of claim 6 , wherein the processor, the transmitter, and the receiver are further configured to release the assigned E-DCH resource on a condition that a predetermined period of time has elapsed since receiving the assigned E-DCH resource.
10. The WTRU of claim 6 , wherein the transmitter is further configured to re-transmit the transmission burst at a new power transmission level on a condition that the acquisition indication is not received within a predetermined period of time.