Method and apparatus for minimizing redundant enhanced dedicated channel allocation information
A method and wireless transmit/receive unit (WTRU) that does not have an allocation of enhanced dedicated channel (E-DCH) resources is disclosed. The WTRU transmits E-DCH channel allocation information to a Node-B. In response to transmitting the E-DCH channel allocation information, the WTRU activates a timer. On a condition that an acknowledgement to the transmitted E-DCH channel allocation information is not received, the WTRU retransmits the E-DCH channel allocation information. On a condition that an acknowledgement to the transmitted E-DCH channel allocation information is received, the WTRU waits to transmit the E-DCH channel allocation information or updated E-DCH channel allocation information until the timer expires.
1. A method for use by a wireless transmit/receive unit (WTRU), the method comprising:
transmitting an enhanced dedicated channel (E-DCH) scheduling allocation request to a Node-B over an enhanced uplink (EU) channel in response to having scheduled E-DCH buffered data to send and not having an allocation of E-DCH resources to send the scheduled E-DCH buffered data, wherein the E-DCH scheduling allocation request includes data priority information;
on a condition that an acknowledgement to the transmitted E-DCH scheduling allocation request is received and a grant of E-DCH resources is not received upon expiration of a timer, transmitting another E-DCH scheduling allocation request, wherein the timer indicates a predetermined time period, and wherein the predetermined time period is based on a received value; and
on a condition that a grant of E-DCH resources is received within the predetermined time period, resetting the timer and transmitting the scheduled E-DCH buffered data based on the received grant of E-DCH resources.
2. The method of claim 1 wherein the acknowledgement is an ACK or a NACK message.
3. The method of claim 1
wherein the grant of E-DCH resources is received from the Node-B in response to the transmitted E-DCH scheduling allocation request.
4. A wireless transmit/receive unit (WTRU) comprising:
at least one circuit configured to transmit an enhanced dedicated channel (E-DCH) scheduling allocation request to a Node-B over an enhanced uplink (EU) channel in response to having scheduled E-DCH buffered data to send and not having an allocation of E-DCH resources to send the scheduled E-DCH buffered data, wherein the E-DCH scheduling allocation request includes data priority information;
on a condition that an acknowledgement to the transmitted E-DCH scheduling allocation request is received and a grant of E-DCH resources is not received upon expiration of a timer, the at least one circuit is configured to transmit another E-DCH scheduling allocation request, wherein the timer indicates a predetermined time period, and wherein the predetermined time period is based on a received value; and
on a condition that a grant of E-DCH resources is received within the predetermined time period, the at least one circuit is configured to reset the timer and transmit the scheduled E-DCH buffered data based on the received grant of E-DCH resources.
5. The WTRU of claim 4 wherein the acknowledgement is an ACK or a NACK message.
6. The WTRU of claim 4
wherein the grant of E-DCH resources is received from the Node-B in response to the transmitted E-DCH scheduling allocation request.