System and method for increasing maximum payload size

Abstract

A method and apparatus for increasing, at a transmitter, a payload size of a communication channel having orthogonal groups, the method referencing a base orthogonal sequence set comprising orthogonal sequences that are mutually orthogonal, the orthogonal sequence set having subsets that are sub-block orthogonal with a length of four; and selecting a spreading sequence set from a plurality of spreading sequence sets, each of the plurality of spreading sequence sets comprising an orthogonal sequence set subset combined with an imaginary orthogonal sequence set subset, wherein the selecting increases payload size.

1 . A transmitting apparatus comprising:
 a processor; and   a communications subsystem,   
       wherein the transmitting apparatus is configured to increase a payload size of a communication channel having orthogonal groups by:
 referencing a base orthogonal sequence set comprising orthogonal sequences that are mutually orthogonal, the orthogonal sequence set having subsets that are sub-block orthogonal with a length of four; and 
 selecting a spreading sequence set from a plurality of spreading sequence sets, each of the plurality of spreading sequence sets comprising an orthogonal sequence set subset combined with an imaginary orthogonal sequence set subset, 
 
       wherein the selecting increases payload size; 
       wherein the base orthogonal sequence set includes twelve orthogonal sequences and three subsets; and 
       wherein the plurality of spreading sequence sets comprises two spreading sequence sets for an increase of one bit of payload, four spreading sequence sets for an increase of two bits of payload, and eight spreading sequence sets for an increase of three bits of payload . 
     
     
         2 . The transmitting apparatus of  claim 1 , wherein the selection of the spreading sequence set from the plurality of spreading sequence sets is mapped to a predefined bit sequence. 
     
     
         3 . The transmitting apparatus of  claim 1 , wherein selection of candidate spreading sequence sets from the plurality of spreading sequence sets maximizes differences between spreading sequence sets: 
     
     
         4 . The transmitting apparatus of  claim 1 , wherein the transmitting apparatus is further configured to use up to twelve spreading sequences for each spreading sequence set for transmission. 
     
     
         5 . The transmitting apparatus of  claim 4 , wherein the transmitting apparatus is further configured to use a higher order modulation than binary phase shift keying for transmission. 
     
     
         6 . The transmitting apparatus of  claim 1 , wherein the transmitting apparatus is further configured to use a higher order modulation than binary phase shift keying for transmission. 
     
     
         7 . The transmitting apparatus of  claim 1 , wherein the communication channel is a physical hybrid ARQ indicator channel. 
     
     
         8 . The transmitting apparatus of  claim 1 , wherein the transmitting apparatus is a network element. 
     
     
         9 . A transmitting apparatus comprising:
 a processor; and   a communications subsystem,   
       wherein the transmitting apparatus is configured to increase a payload size of a communication channel having orthogonal groups, by:
 referencing a base orthogonal sequence set comprising twelve orthogonal sequences that are mutually orthogonal, the orthogonal sequence set having three subsets that are sub-block orthogonal with a length of four; 
 selecting a spreading sequence based on an orthogonal sequence set subset combined with an imaginary orthogonal sequence set subset; and 
 utilizing, at the transmitter, at least one extra orthogonal sequence to increase payload size; 
 wherein the spreading sequence is selected from a plurality of spreading sequence sets and the plurality of spreading sequence sets comprises two spreading sequence sets for an increase of one bit of payload, four spreading sequence sets for an increase of two bits of payload, and eight spreading sequence sets for an increase of three bits of payload. 
 
     
     
         10 . The transmitting apparatus of  claim 9 , wherein the transmitting apparatus is further configured to use a higher order modulation than binary phase shift keying for transmission. 
     
     
         11 . The transmitting apparatus of  claim 9 , wherein the transmitting apparatus is a network element. 
     
     
         12 . A receiver apparatus comprising:
 a processor; and   a communications subsystem,   
       wherein the receiving apparatus is configured to detect increased payload size of a communication channel having orthogonal groups, by:
 receiving a signal; 
 referencing a base orthogonal sequence set comprising orthogonal sequences that are mutually orthogonal, the orthogonal sequence set having subsets that are sub-block orthogonal with a length of four; 
 determining which of a spreading sequence set from a plurality of spreading sequence sets was used for encoding the signal, the plurality of spreading sequence sets comprising an orthogonal sequence set subset combined with an imaginary orthogonal sequence set subset; and 
 adding extra bits to the signal based on the determining; 
 wherein the base orthogonal sequence set includes twelve orthogonal sequences and three subsets; and 
 wherein the plurality of spreading sequence sets comprises two spreading sequence sets for an increase of one bit of payload, four spreading sequence sets for an increase of two bits of payload, and eight spreading sequence sets for an increase of three bits of payload. 
 
     
     
         13 . The receiver apparatus of  claim 12 , wherein the number of extra bits possible is signaled to the receiver prior to the receiving. 
     
     
         14 . The receiver apparatus of  claim 12 , wherein the determining is based on mapping to a predefined bit sequence. 
     
     
         15 . The receiver apparatus of  claim 12 , wherein the receiving apparatus is further configured to detect use of extra spreading sequences for transmission. 
     
     
         16 . The receiver apparatus of  claim 12 , wherein the receiving apparatus is further configured to detect use of a higher order modulation than binary phase shift keying for transmission. 
     
     
         17 . The receiver apparatus of  claim 12 , wherein the receiver apparatus is a user equipment (UE).