Optimized serving dual cell change

Abstract

A method and apparatus for implementing serving cell change in a multi-cell wireless transmit receive unit (WTRU) are disclosed. Serving cell information is received and stored by the WTRU to preconfigure a primary and secondary serving cell of an added cell to an active set. At least one of the preconfigured primary and secondary serving cells are monitored for a handover indication. Serving cell change is to the primary and secondary serving cells is performed using the preconfigured serving cell information upon receipt of a handover indication.

1 .- 14 . (canceled) 
     
     
         15 . A method implemented by a wireless transmit receive unit (WTRU), the method comprising:
 transmitting information on a primary uplink frequency on a serving cell;   receiving information on a primary downlink frequency on the serving cell and at least one secondary downlink frequency on a secondary serving cell;   receiving target cell pre-configuration information, wherein the target cell pre-configuration information includes high speed dedicated shared channel (HS-DSCH) configuration information for the at least one secondary downlink frequency;   storing the target cell pre-configuration information;   transmitting a measurement report with event  1 D; and   monitoring control signals in a target cell.   
     
     
         16 . The method of  claim 15 , wherein the control signals are monitored on a carrier frequency having the same frequency as the primary downlink frequency. 
     
     
         17 . The method of  claim 15 , further comprising:
 transmitting information on at least one secondary uplink frequency on the secondary uplink serving cell   
     
     
         18 . The method of  claim 15 , wherein the control signals are received over a high speed shared control channel (HS-SCCH). 
     
     
         19 . The method of  claim 18 , further comprising:
 performing a serving cell change using the target cell per-configuration information on a condition that a target cell HS-SCCH order is received on the HS-SCCH of the target cell.   
     
     
         20 . The method of  claim 18 , further comprising:
 performing a secondary serving cell change on a condition that a target cell HS-SCCH order is received on the HS-SCCH of the target cell.   
     
     
         21 . The method of  claim 15 , wherein the serving cell and the secondary serving cell are HS-DSCH cells and wherein the target cell pre-configuration information includes a HS-DSCH radio network transaction identifier (H-RNTI). 
     
     
         22 . The method of  claim 15 , wherein the target cell pre-configuration information is associated with the primary downlink frequency of the serving cell and at least one secondary downlink frequency of the secondary serving cell. 
     
     
         23 . A wireless transmit receive unit (WTRU) comprising:
 circuitry configured to transmit information on a primary uplink frequency on a serving cell;   circuitry configured to receive information on a primary downlink frequency on the serving cell and at least one secondary downlink frequency on a secondary serving cell;   circuitry configured to receive target cell pre-configuration information, wherein the target cell pre-configuration information includes high speed dedicated shared channel (HS-DSCH) configuration information for the at least one secondary downlink frequency;   circuitry configured to store the target cell pre-configuration information;   circuitry configured to transmit a measurement report with event  1 D; and   circuitry configured to monitor control signals in a target cell.   
     
     
         24 . The WTRU of  claim 23 , wherein the control signals are monitored on a carrier frequency having the same frequency as the primary downlink frequency. 
     
     
         25 . The WTRU of  claim 23 , further comprising:
 circuitry configured to transmit information on at least one secondary uplink frequency on the secondary uplink serving cell   
     
     
         26 . The WTRU of  claim 23 , wherein the control signals are received over a high speed shared control channel (HS-SCCH). 
     
     
         27 . The WTRU of  claim 26 , further comprising:
 circuitry configured to perform a serving cell change using the target cell pre-configuration information on a condition that a target cell HS-SCCH order is received on the HS-SCCH of the target cell.   
     
     
         28 . The WTRU of  claim 26 , further comprising:
 circuitry configured to perform a secondary serving cell change on a condition that a target cell HS-SCCH order is received on the HS-SCCH of the target cell.   
     
     
         29 . The WTRU of  claim 23 , wherein the serving cell and the secondary serving cell are HS-DSCH cells, wherein the target cell pre-configuration information includes a HS-DSCH radio network transaction identifier (H-RNTI), and wherein the target cell pre-configuration information is associated with the primary downlink frequency of the serving cell and at least one secondary downlink frequency of the secondary serving cell. 
     
     
         30 . A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:
 transmitting a  1 A or a  1 C measurement report;   receiving target cell pre-configuration information, wherein the target cell pre-configuration information includes enhanced dedicated channel (E-DCH) configuration information for a secondary uplink frequency, and wherein the E-DCH configuration information includes E-DCH relative grant channel (E-RGCH) information; and   transmitting a  1 D measurement report.   
     
     
         31 . The method of  claim 30 , wherein the target cell pre-configuration information includes a high-speed downlink shared channel (HS-DSCH) radio network transaction identifier (H-RNTI). 
     
     
         32 . The method of  claim 30 , further comprising:
 transmitting information on a primary uplink frequency on a serving cell and a secondary uplink frequency on a secondary serving cell; and   receiving information on a primary downlink frequency on the serving cell and a secondary downlink frequency on the secondary serving cell.   
     
     
         33 . The method of  claim 32 , further comprising:
 storing the target cell pre-configuration information; and   monitoring control signals on the target cell, the serving cell, and the secondary serving cell.   
     
     
         34 . The method of  claim 32 , further comprising:
 receiving a high speed shared control channel (HS-SCCH), order to activate or deactivate the secondary uplink frequency and the secondary downlink frequency.   
     
     
         35 . A wireless transmit/receive unit (WTRU) comprising:
 circuitry configured to transmit a  1 A or a  1 C measurement report;   circuitry configured to receive target cell pre-configuration information wherein the target cell pre-configuration information includes enhanced dedicated channel (E-DCH) configuration information for a secondary uplink frequency, and wherein the E-DCH configuration information includes E-DCH relative grant channel (E-RGCH) information; and   circuitry configured to transmit a  1 D measurement report.   
     
     
         36 . The WTRU of  claim 35 , wherein the target cell pre-configuration information includes a high-speed downlink shared channel (HS-DSCH) radio network transaction identifier, (H-RNTI). 
     
     
         37 . The WTRU of  claim 35 , further comprising:
 circuitry configured to transmit information on a primary uplink frequency on a serving cell and a secondary uplink frequency on a secondary serving cell; and   circuitry configured to receive information on a primary downlink frequency on the serving cell and a secondary downlink frequency on the secondary serving cell.   
     
     
         38 . The WTRU of  claim 23 , further comprising:
 circuitry configured to store the target cell pre-configuration information; and   circuitry configured to monitor control signals on the target cell, the serving cell, and the secondary serving cell.   
     
     
         39 . The WTRU of  claim 23 , further comprising:
 circuitry configured to receive a high speed shared control channel (HS-SCCH) order to activate or deactivate the secondary uplink frequency and the secondary downlink frequency.