Method and apparatus for providing fast detection of a high speed shared control channel
AssigneeInterDigital Technology Corporation
InventorsGregory S. Sternberg, Yingming Tsai, Philip J. Pietraski
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Abstract
A method and apparatus for providing fast detection of a high speed shared control channel (HS-SCCH). The HS-SCCH carries information necessary for receiving data via a high speed downlink shared channel (HS-DSCH). The apparatus receives messages transmitted via a plurality of HS-SCCHs. The apparatus measures a channel quality for the messages received via each HS-SCCH. The apparatus performs a threshold test by comparing the channel quality with a predetermined threshold. The apparatus then selects a HS-SCCH having the best channel quality among the HS-SCCHs.
Claims14
A wireless transmit/receive unit (WTRU) for providing fast detection of a high speed shared control channel (HS-SCCH), the WTRU comprising:
- a plurality of decoders for receiving downlink control messages including a last received downlink control message transmitted via a plurality of monitored HS-SCCHs and calculating an accumulated soft metric for each of the HS-SCCHs;
- a threshold comparator which receives the calculated accumulated soft metrics from the decoders and determines that at least two of the accumulated soft metrics pass a threshold test and are close in value;
- and
- a selector for selecting a high-speed downlink shared channel (HS-DSCH) indicated by the particular monitored HS-SCCH to receive downlink messages, on a condition that one of the at least two accumulated soft metrics is associated with a particular one of the monitored HS-SCCHs used to receive the last received downlink control message.
In a wireless transmit/receive unit (WTRU) for providing fast detection of a high speed shared control channel (HS-SCCH), an integrated circuit (IC) comprising:
- a plurality of decoders for receiving downlink control messages including a last received downlink control message transmitted via a plurality of monitored HS-SCCHs and calculating an accumulated soft metric for each of the HS-SCCHs;
- a threshold comparator which receives the calculated accumulated soft metrics from the decoders and determines that at least two of the accumulated soft metrics pass a threshold test and are close in value;
- and
- a selector for selecting a high-speed downlink shared channel (HS-DSCH) indicated by the particular monitored HS-SCCH to receive downlink messages, on a condition that one of the at least two accumulated soft metrics is associated with a particular one of the monitored HS-SCCHs used to receive the last received downlink control message.
A wireless transmit/receive unit (WTRU) for providing fast detection of a high speed shared control channel (HS-SCCH), the WTRU comprising:
- a plurality of decoders configured to receive messages transmitted via a plurality of HS-SCCHs, decode the messages, and generate an accumulated soft metric for each of the HS-SCCHs;
- a threshold comparator configured to perform a threshold test by comparing each of the accumulated soft metrics with a soft metric threshold;
- and a selector configured to select an HS-SCCH having the lowest accumulated soft metric among those HS-SCCHs having an accumulated soft metric lower than the soft metric threshold, wherein a plurality of the accumulated soft metrics pass the threshold test and are close in value, preference is given to the HS-SCCH that was previously used to transmit the last received message.
An integrated circuit (IC) for providing fast detection of a high speed shared control channel (HS-SCCH), the IC comprising:
- a plurality of decoders configured to receive messages transmitted via a plurality of HS-SCCHs, decode the messages, and generate an accumulated soft metric for each of the HS-SCCHs;
- a threshold comparator configured to perform a threshold test by comparing each of the accumulated soft metrics with a soft metric threshold;
- and a selector configured to select an HS-SCCH having the lowest accumulated soft metric among those HS-SCCHs having an accumulated soft metric lower than the soft metric threshold, wherein a plurality of the accumulated soft metrics pass the threshold test and are close in value, preference is given to the HS-SCCH that was previously used to transmit the last received message.
Dependencies are inferred from the claim text.