Method for encoding information in communication network

Abstract

Embodiments of the application provide a method for rate matching in a wireless communication network. A device obtains K information bits and a target code length M of a polar code, determines, according to a minimum value of a set of values, a mother code length N1, polar encodes the K information bits to obtain an encoded sequence of N1 bits, obtains a target sequence of M bits from the N1 bit encoded sequence, and outputs the M-bit target sequence. When the mother code length N1 is larger than the target code length M, (N1−M) bits of the encoded sequence are punctured or shortened from the N1 bit encoded sequence.

What is claimed is: 
     
         1 . An encoding method, comprising:
 obtain an information bit sequence and a target code length M of a polar code; and   when a preset condition is satisfied, polar encode the information bit sequence to output a first encoded bit sequence with a first mother code length N 1 .   
     
     
         2 . The method according to  claim 1 , further comprising:
 when the preset condition is not satisfied, polar encode the information bit sequence, to output a second encoded bit sequence having a second mother code length N 2 .   
     
     
         3 . The method according to  claim 1 , wherein the preset condition is: a difference between the target code length M and the first mother code length N 1  is less than a preset range. 
     
     
         4 . The method according to  claim 3 , wherein a difference between the target code length M and the first mother code length N 1  is less than a preset range is indicatable by the following form:
     M≤N   1 *(1+δ)
   wherein a value of δ is a constant.   
     
     
         5 . The method according to  claim 3 , wherein a value of δ is 1/8, 1/4, or 3/8. 
     
     
         6 . An apparatus in a wireless communication network, comprising at least one processor and at least one memory storing program instructions, wherein when executed by the at least one processor, the program instructions cause the apparatus to:
 obtain an information bit sequence and a target code length M of a polar code; and   when a preset condition is satisfied, polar encode the information bit sequence to output a first encoded bit sequence with a first mother code length N 1 .   
     
     
         7 . The apparatus according to  claim 6 , wherein when executed by the at least one processor, the program instructions further cause the apparatus to:
 when the preset condition is not satisfied, polar encode the information bit sequence, to output a second encoded bit sequence having a second mother code length N 2 .   
     
     
         8 . The apparatus according to  claim 6 , wherein the preset condition is: a difference between the target code length M and the first mother code length N 1  is less than a preset range. 
     
     
         9 . The apparatus according to  claim 8 , wherein a difference between the target code length M and the first mother code length N 1  is less than a preset range is indicatable by the following form:
     M≤N   1 *(1+δ)
   wherein a value of δ is a constant.   
     
     
         10 . The apparatus according to  claim 8 , wherein a value of δ is 1/8, 1/4, or 3/8. 
     
     
         11 . The apparatus according to  claim 6 , wherein the apparatus is a user terminal or a base station. 
     
     
         12 . A non-transitory computer readable medium storing program codes thereon for execution by at least one processor in a communication apparatus, wherein the program codes comprises instructions, when executed by the at least one processor, causing the communication apparatus to:
 obtain an information bit sequence and a target code length M of a polar code; and   when a preset condition is satisfied, polar encode the information bit sequence to output a first encoded bit sequence with a first mother code length N 1 .   
     
     
         13 . The non-transitory computer readable medium according to  claim 12 , wherein when executed by the at least one processor, further causing the apparatus to:
 when the preset condition is not satisfied, polar encode the information bit sequence, to output a second encoded bit sequence having a second mother code length. N 2 .   
     
     
         14 . The non-transitory computer readable medium according to  claim 13 , wherein the preset condition is: a difference between the target code length M and the first mother code length N 1  is less than a preset range . 
     
     
         15 . The non-transitory computer readable medium according to  claim 14 , wherein a difference between the target code length M and the first mother code length N 1  is less than a preset range is indicatable by the following form:
     M≤N   1 *(1+δ)
   wherein a value of δ is a constant.   
     
     
         16 . The non-transitory computer readable medium according to  claim 13 , wherein a value of δ is 1/8, 1/4, or 3/8.