Method and apparatus for data-splitting transmission from multiple sites

Abstract

Methods and apparatus for changing cell range coverage are disclosed. A wireless transmit/receive unit (WTRU) may include circuitry configured to transmit subframes of radio frames using a physical uplink shared channel (PUSCH), where the subframes are divided into first and second sets. The circuitry may include a first power control loop utilized for the first set of subframes and a second power control loop utilized for the second set of subframes. The first power control loop may set transmission power levels for transmission over the PUSCH for the first set of subframes, and the second power control loop may set transmission power levels for transmission over the PUSCH for the second set of subframes. The circuitry may be configured with a first physical uplink control channel (PUCCH) for a first eNodeB and a second PUCCH for a second eNodeB to simultaneously communicate with the first and the second eNodeBs.

What is claimed is: 
     
         1 . A wireless transmit/receive unit (WTRU) comprising:
 circuitry configured to transmit subframes of radio frames using a physical uplink shared channel (PUSCH), wherein the subframes are divided into a first set and a second set,   wherein the circuitry includes a first power control loop which is utilized for the first set of subframes and the circuitry includes a second power control loop which is utilized for the second set of subframes,   wherein the first power control loop is utilized for setting transmission power levels for transmission over at least the PUSCH for the first set of subframes,   wherein the second power control loop is utilized for setting transmission power levels for transmission over the PUSCH for the second set of subframes,   wherein the circuitry is further configured to simultaneously communicate with a first eNodeB and a second eNodeB, and   wherein the circuitry is configured with a first physical uplink control channel (PUCCH) for the first eNodeB and a second PUCCH for the second eNodeB.   
     
     
         2 . The WTRU of  claim 1 , wherein the circuitry is further configured to receive scheduling information from the first eNodeB and independently receive scheduling information from the second eNodeB. 
     
     
         3 . The WTRU of  claim 1 , wherein a data flow is split between the first eNodeB and the second eNodeB. 
     
     
         4 . The WTRU of  claim 1 , wherein the circuitry is further configured to determine a common timing advance for transmitting to the first eNodeB and the second eNodeB, and transmit the first set of subframes and the second set of subframes according to the common timing advance. 
     
     
         5 . The WTRU of  claim 1 , wherein circuitry is further configured to determine a first timing advance for transmitting to the first eNodeB and a second timing advance for transmitting to the second eNodeB, and transmit the first set of subframes and the second set of subframes according to the first timing advance and the second timing advance, respectively, wherein the first timing advance is different than the second timing advance. 
     
     
         6 . The WTRU of  claim 1 , wherein circuitry is further configured to simultaneously monitor for timing adjustment information from the first eNodeB and the second eNodeB. 
     
     
         7 . A method implemented in a wireless transmit/receive unit (WTRU) including a first power control loop circuit and a second power control loop circuit, the method comprising:
 transmitting subframes of radio frames using a physical uplink shared channel (PUSCH), wherein the subframes are divided into a first set and a second set, and the first power control loop circuit is utilized for transmitting the first set of subframes and the second power control loop circuit is utilized for transmitting the second set of subframes, wherein transmitting the subframes comprises:
 setting, by the first power control loop circuit, transmission power levels for transmission over at least the PUSCH for the first set of subframes, and 
 setting, by the second power control loop circuit, transmission power levels for transmission over at least the PUSCH for the second set of subframes; and 
   communicating simultaneously with a first eNodeB and a second eNodeB, wherein the first control loop circuit is configured with a first physical uplink control channel (PUCCH) for the first eNodeB and the second control loop circuit is configured with a second PUCCH for the second eNodeB.   
     
     
         8 . The method of  claim 7 , further comprising:
 receiving scheduling information from the first eNodeB; and   receiving scheduling information from the second eNodeB independent of the scheduling information from the first eNodeB.   
     
     
         9 . The method of  claim 7 , further comprising splitting a data flow between the first eNodeB and the second eNodeB. 
     
     
         10 . The method of  claim 7 , further comprising:
 determining a common timing advance for transmitting to the first eNodeB and the second eNodeB; and   transmitting the first set of subframes and the second set of subframes according to the common timing advance.   
     
     
         11 . The method of  claim 7 , further comprising:
 determining a first timing advance for transmitting to the first eNodeB and a second timing advance for transmitting to the second eNodeB, wherein the first timing advance is different than the second timing advance; and   transmitting the first set of subframes and the second set of subframes according to the first timing advance and the second timing advance, respectively.   
     
     
         12 . The method of  claim 7 , further comprising monitoring simultaneously for timing adjustment information from the first eNodeB and the second eNodeB.