Method and apparatus for facilitating reliable transmission of a control region size and detection of cross-carrier signaling

Abstract

Methods, apparatuses, and computer program products are disclosed for facilitating indicating and detecting control region sizes. A multi-carrier communication between a wireless terminal and a base station is facilitated by a first carrier having a first control region size and a second carrier having a second control region size. Embodiments are disclosed in which control region sizes are ascertained from a control signal, wherein the control is generated by either scrambling an aspect of the control signal based on the second control region size, or relating the second control region size with the first control region size. Other disclosed embodiments for ascertaining control region sizes include a reverse interleaver embodiment, wherein a set of modulation symbols is mapped beginning from a last data symbol and ending with a first available data symbol.

What is claimed is: 
     
         1 . A method that facilitates indicating a size of a control region, the method comprising:
 establishing a multi-carrier communication with at least one user equipment, the multi-carrier communication facilitated by a first carrier and a second carrier;   implementing a reverse interleaver, wherein the reverse interleaver is configured to map a set of modulation symbols beginning from a last data symbol and ending with a first available data symbol; and   transmitting the set of modulation symbols to the at least one user equipment.   
     
     
         2 . The method of  claim 1 , wherein the set of modulation symbols is associated with a Physical Downlink Shared Channel. 
     
     
         3 . The method of  claim 1 , the reverse interleaver mapping the set of modulation symbols according to a frequency first, time second, interleaving scheme. 
     
     
         4 . A method that facilitates determining a size of a control region comprising:
 configuring a user equipment (UE) to monitor a first carrier and a second carrier, the first carrier having a first control region size, the second carrier having a second control region size;   receiving a set of reverse interleaved modulation symbols, wherein the set of reverse interleaved modulation symbols are mapped beginning from a last data symbol and ending with a first available data symbol; and   ascertaining the first control region size and the second control region size, the ascertaining including de-interleaving the set of reverse interleaved modulation symbols.   
     
     
         5 . The method of  claim 4 , the ascertaining comprising erasing an initial sequence of the set of reverse interleaved modulation symbols, the initial sequence beginning with the last data symbol. 
     
     
         6 . The method of  claim 4 , wherein the set of reverse interleaved modulation symbols is associated with a Physical Downlink Shared Channel. 
     
     
         7 . The method of  claim 4 , wherein the set of reverse interleaved modulation symbols is mapped according to a frequency first, time second, interleaving scheme. 
     
     
         8 . An apparatus configured to determine a size of a control region, the apparatus comprising:
 a processor configured to:
 initialize a user equipment (UE) to monitor a first carrier and a second carrier, the first carrier having a first control region size, the second carrier having a second control region size; 
 receive a set of reverse interleaved modulation symbols, wherein the set of reverse interleaved modulation symbols are mapped beginning from a last data symbol and ending with a first available data symbol; and 
 decode the first control region size and the second control region size by de-interleaving the set of reverse interleaved modulation symbols. 
   
     
     
         9 . The apparatus of  claim 8 , wherein the processor is further configured to erase an initial sequence of the set of reverse interleaved modulation symbols, the initial sequence beginning with the last data symbol. 
     
     
         10 . The apparatus of  claim 8 , wherein the set of reverse interleaved modulation symbols is associated with a Physical Downlink Shared Channel. 
     
     
         11 . The apparatus of  claim 8 , wherein the set of reverse interleaved modulation symbols is mapped according to a frequency first, time second, interleaving scheme.