Method for controlling the data rate of a circuit switched voice application in an evolved wireless system

摘要

An apparatus and method of transmitting a circuit switched (CS) voice application via an enhanced dedicated channel (E-DCH), implemented in a wireless transmit/receive unit (WTRU). The method includes receiving a grant; performing an E-TFC selection procedure based on the grant, wherein a number of bits that may be transmitted over an enhanced dedicated channel (E-DCH) is determined, determining an adaptive multi-rate (AMR) codec bit-rate based on the number of bits that may be transmitted over the E-DCH, generating AMR voice packets based on the determined AMR codec bit rate, and submitting the AMR voice packets to lower layers for transmission over the E-DCH.

主权项

1. A method for use in a wireless transmit/receive unit (WTRU), the method comprising:
receiving a signal, from a Node-B, indicating an adaptive multi-rate (AMR) codec bit-rate for uplink transmissions; receiving a grant, from the Node-B, wherein the grant indicates a maximum allowable transmission power; determining a number of bits that may be transmitted over an enhanced dedicated channel (E-DCH), wherein the number of bits is determined using an enhanced-transport format combination (E-TFC) selection procedure; determining, at the WTRU, an AMR codec bit-rate based on the received signal and the determined number of bits that are to be transmitted over the E- DCH via the E-TFC selection procedure; reducing the AMR codec bit-rate in advance of the E-TFC selection procedure on a condition that the WTRU will be in a power-limited state within a predetermined period of time; and transmitting data at the determined AMR codec bit-rate over the E-DCH.