System level architectures for relayed uplink communication

Abstract

A wireless communication method and apparatus are disclosed for assigning different phases, (i.e., time periods), to perform data transmissions over designated frequency bands in a cooperative relaying system. In phase 1, a relay station (RS) listens to a wireless transmit/receive unit (WTRU) and successfully receives b information bits. In phase 2, the RS and WTRU cooperatively transmit these b information bits to the destination. These transmissions may be performed in a unicast scheme, wherein a WTRU sends information to a selected RS in phase 1, and the RS forwards the information to a base station (BS) in phase 2. The transmission may also be performed in a multicast scheme, wherein the WTRU sends information to the RS and the BS in phase 1, and the RS transmits a subset the information to the BS in phase 2.

What is claimed is: 
     
         1 . A method of transmitting information bits, the method comprising:
 a wireless transmit/receive unit (WTRU) transmitting a complete set of information bits to a relay station (RS) over a first frequency band;   the WTRU transmitting a first portion of the information bits in the set to a base station (BS) over a second frequency band;   the WTRU receiving an acknowledgement from the RS indicating successful receipt of the complete set of information bits;   on a condition that the RS fully decodes the complete set of information bits:
 the RS transmitting a second portion of the information bits in the set to the BS over the first and second frequency bands; and 
 the BS recovering the complete set of information bits. 
   
     
     
         2 . The method of  claim 1  further comprising:
 the WTRU ceasing transmission of the complete set of information bits to the RS over the first frequency band in response to receiving the acknowledgement, while continuing to transmit the first portion of the information bits to the BS over the second frequency band. 
 
     
     
         3 . A method of transmitting information bits, the method comprising:
 a wireless transmit/receive unit (WTRU) transmitting a complete set of information bits to a relay station (RS) over a first frequency band;   the WTRU transmitting a first portion of the information bits in the set to a base station (BS) over a second frequency band;   the WTRU receiving an acknowledgement from the RS indicating successful receipt of the complete set of information bits; and   the WTRU ceasing transmission of the complete set of information bits to the RS over the first frequency band in response to receiving the acknowledgement, while continuing to transmit the first portion of the information bits to the BS over the second frequency band.   
     
     
         4 . The method of  claim 3  further comprising:
 on a condition that the RS fully decodes the complete set of information bits:
 the RS and the WTRU coordinately transmitting a second portion of the information bits in the set to the BS over the first and second frequency bands; and 
 the BS recovering the complete set of information bits. 
 
 
     
     
         5 . A wireless transmit/receive unit (WTRU) comprising:
 a transmitter configured to transmit a complete set of information bits to a relay station (RS) over a first frequency band, and transmit a first portion of the information bits in the set to a base station (BS) over a second frequency band; and   a receiver configured to receive an acknowledgement from the RS indicating successful receipt of the complete set of information bits, wherein on a condition that the RS fully decodes the complete set of information bits, the RS transmits a second portion of the information bits in the set to the BS over the first and second frequency bands, and the BS recovers the complete set of information bits.   
     
     
         6 . The WTRU of  claim 5  further comprising:
 the WTRU ceasing transmission of the complete set of information bits to the RS over the first frequency band in response to receiving the acknowledgement, while continuing to transmit the first portion of the information bits to the BS over the second frequency band. 
 
     
     
         7 . A wireless transmit/receive unit (WTRU) comprising:
 a transmitter configured to transmit a complete set of information bits to a relay station (RS) over a first frequency band, and transmit a first portion of the information bits in the set to a base station (BS) over a second frequency band; and   a receiver configured to receive an acknowledgement from the RS indicating successful receipt of the complete set of information bits, wherein the WTRU ceases transmission of the complete set of information bits to the RS over the first frequency band in response to receiving the acknowledgement, while continuing to transmit the first portion of the information bits to the BS over the second frequency band.   
     
     
         8 . The WTRU of  claim 7  wherein on a condition that the RS fully decodes the complete set of information bits, the RS and the WTRU coordinately transmit a second portion of the information bits in the set to the BS over the first and second frequency bands, and the BS recovers the complete set of information bits.