Method and apparatus for assigning radio resources and controlling transmission parameters on a random access channel

Abstract

A method and apparatus for assigning radio resources and controlling parameters for transmission over a random access channel in wireless communications by enhancing a random access channel is disclosed.

What is claimed is: 
     
         1 . A method comprising:
 receiving an indication that comprises a maximum resource allocation; and   sending data in accordance with the maximum resource allocation.   
     
     
         2 . The method of  claim 1 , wherein the indication is received via broadcast signaling. 
     
     
         3 . The method of  claim 1 , wherein the maximum resource allocation indicates a maximum amount of transmission time. 
     
     
         4 . The method of  claim 1 , wherein data is sent on an enhanced random access channel (RACH). 
     
     
         5 . The method of  claim 1 , wherein the indication further comprises at least one of:
 a maximum transmission rate that can be used for transmitting a random access channel (RACH) frame;   a maximum power that can be used for transmitting the RACH frame;   a maximum ratio of a RACH data part power to a power of a preamble;   an absolute maximum total power for transmission of the RACH frame;   a maximum power for transmission of the RACH frame relative to the power of a preamble;   a maximum RACH transport block size; or   a transmission time interval (TTI) size.   
     
     
         6 . A method comprising:
 receiving, via broadcast signaling, an indication that comprises an initial serving grant value; and   sending in enhanced uplink in accordance with the initial serving grant value.   
     
     
         7 . The method of  claim 6 , wherein the initial serving grant value comprises an indication of a maximum ratio of data part power to control part power. 
     
     
         8 . The method of  claim 6 , further comprising:
 receiving, via an enhanced absolute grant channel (E-AGCH), a second indication that comprises a second initial serving grant value; and   sending in enhanced uplink in accordance with the second initial serving grant value.   
     
     
         9 . The method of  claim 6  further comprising:
 receiving, via an enhanced relative grant channel (E-RGCH), a second indication that comprises a second initial serving grant value; and 
 sending in enhanced uplink in accordance with the second initial serving grant value. 
 
     
     
         10 . The method of  claim 6 , further comprising:
 sending a plurality of physical random access channel (PRACH) slots, each PRACH slot comprising a data part and a control part; and   sending data using more than one spreading factor for channelization codes used in the data part.   
     
     
         11 . The method of  claim 6 , further comprising:
 sending a plurality of physical random access channel (PRACH) slots, each PRACH slot comprising a data part and a control part; and   varying a number of channelization codes used in the data part.   
     
     
         12 . The method of  claim 6 , further comprising:
 sending a plurality of physical random access channel (PRACH) slots, each PRACH slot comprising a data part and a control part; and   varying modulation in the data part.   
     
     
         13 . The method of  claim 6 , further comprising:
 sending a plurality of physical random access channel (PRACH) slots, each PRACH slot comprising a data part and a control part; and   varying transmission power in at least one of the data part or the control part.   
     
     
         14 . A wireless transmit and receive unit (WTRU) comprising:
 a processor configured to:
 receive, via broadcast signaling, an indication that comprises an initial serving grant value; and 
 send in enhanced uplink in accordance with the initial serving grant value. 
   
     
     
         15 . The WTRU of  claim 14 , wherein the initial serving grant value comprises an indication of a maximum ratio of data part power to control part power. 
     
     
         16 . The WTRU of  claim 14 , wherein the processor is further configured to:
 receive, via an enhanced absolute grant channel (E-AGCH), a second indication that comprises a second initial serving grant value; and   send in enhanced uplink in accordance with the second initial serving grant value.   
     
     
         17 . The WTRU of  claim 14 , wherein the processor is further configured to:
 receive, via an enhanced relative grant channel (E-RGCH), a second indication that comprises a second initial serving grant value; and   send in enhanced uplink in accordance with the second initial serving grant value.   
     
     
         18 . The WTRU of  claim 14 , wherein the processor is further configured to:
 send a plurality of physical random access channel (PRACH) slots, each PRACH slot comprising a data part and a control part; and   perform at least one of:
 sending data using more than one spreading factor for channelization codes used in the data part, 
 varying a number of channelization codes used in the data part; 
 varying modulation in the data part; or 
 varying transmission power in at least one of the data part or the control part.