Abstract
Certain aspects of the present disclosure generally relate to wireless communications and, more particularly, to methods and apparatus for dynamic frozen polar codes, for example, for control channels. An exemplary method may be performed at the encoder. The method generally includes encoding a stream of bits using a polar code. The encoding includes selecting a first set of channel indices for encoding information bits. The encoding includes selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits. The encoding includes selecting remaining channel indices for dynamic frozen (PCF) bits having values based on one or more of the information bits. The method includes transmitting the encoded stream of bits.
Technologies
Resource configuration
Product
Use Cases
Wireless communication
Services
Claim
1. A method for wireless communications, comprising:
encoding a stream of bits using a polar code, wherein the encoding includes:
selecting a first set of channel indices for encoding information bits,
selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits; and
selecting remaining channel indices for encoding dynamic frozen (PCF) bits having values based on one or more of the information bits; and
transmitting the encoded stream of bits.
2. The method of claim 1, wherein the channel indices are associated with a reliability metric, and wherein the first set of channel indices is determined based on the reliability metric.
3. The method of claim 1, wherein the information bits comprise payload bits and cyclic redundancy check (CRC) bits.
4. The method of claim 3, further comprising:
CRC encoding the information bits before encoding the stream of bits using the polar code.
5. The method of claim 1, wherein the encoding further comprises:
calculating values for each of the PCF bits as a function of at least a portion of information bits in the stream of bits preceding said each dynamic frozen bit.
6. The method of claim 5, wherein the function comprises an XOR (exclusive or) function.
7. The method of claim 1, wherein the encoded stream of bits comprises a code block of a control channel.
8. The method of claim 1, wherein:
each bit in the encoded stream of bits corresponds to a channel index, and the channel indices of at least one of: the information bits, the fixed frozen bits, or the PCF bits is determined independently for each stream of bits to be encoded.
9. The method of claim 1, wherein the PCF bits comprise 3 PCF bits.
10. An apparatus for wireless communications, comprising:
means for encoding a stream of bits using a polar code, wherein the means for encoding includes:
means for selecting a first set of channel indices for encoding information bits,
means for selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits; and
means for selecting remaining channel indices for encoding dynamic frozen (PCF) bits having values based on one or more of the information bits; and
means for transmitting the encoded stream of bits.
11. The apparatus of claim 10, wherein the channel indices are associated with a reliability metric, and wherein the first set of channel indices is determined based on the reliability metric.
12. The apparatus of claim 10, wherein the information bits comprise payload bits and cyclic redundancy check (CRC) bits.
13. The apparatus of claim 12, further comprising:
means for CRC encoding the information bits before encoding the stream of bits using the polar code.
14. The apparatus of claim 10, wherein the means for encoding further comprises:
means for calculating values for each of the PCF bits as a function of at least a portion of information bits in the stream of bit preceding said each dynamic frozen bit.
15. The apparatus of claim 14, wherein the function comprises an XOR (exclusive or) function.
16. The apparatus of claim 10, wherein the encoded stream of bits comprises a code block of a control channel.
17. The apparatus of claim 10, wherein:
each bit in the encoded stream of bits corresponds to a channel index, and the channel indices of at least one of: the information bits, the fixed frozen bits, or the PCF bits is determined independently for each stream of bits to be encoded.
18. The apparatus of claim 10, wherein the PCF bits comprise 3 PCF bits.
19. An apparatus for wireless communications, comprising:
a sequencer configured to:
select a first set of channel indices for encoding information bits,
select a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits;
select remaining channel indices for encoding dynamic frozen (PCF) bits having values based on one or more of the information bits; and
generate a stream bits according to the selected channel indices;
a polar encoder configured to encode the stream of information bits using a polar code: and a transmitter configured to transmit the encoded stream of bits.
20. The apparatus of claim 19, wherein the channel indices are associated with a reliability metric, and wherein the first set of channel indices is determined based on the reliability metric.
21. The apparatus of claim 19, wherein the information bits comprise payload bits and cyclic redundancy check (CRC) bits.
22. The apparatus of claim 21, further comprising:
a CRC encoder configured to CRC encoding the information bits before the polar encoder encodes the stream of bits using the polar code.
23. The apparatus of claim 19, further comprising at least one processor coupled with a memory and configured to:
calculate values for each of the PCF bits as a function of at least a portion of information bits in the stream of bits preceding said each dynamic frozen bit.
24. The apparatus of claim 23, wherein the function comprises an XOR (exclusive or) function.
25. The apparatus of claim 19, wherein the encoded stream of bits comprises a code block of a control channel.
26. The apparatus of claim 19, wherein:
each bit in the encoded stream of bits corresponds to a channel index, and the sequencer is configured to independently determine the channel indices of at least one of: the information bits, the fixed frozen bits, or the PCF bits for each stream of bits to be encoded.
27. The apparatus of claim 19, wherein the PCF bits comprise 3 PCF bits.
28. A computer readable medium having computer executable code stored thereon for wireless communications, comprising:
code for encoding a stream of bits using a polar code, wherein the code for encoding includes:
code for selecting a first set of channel indices for encoding information bits,
code for selecting a second set of the channel indices smaller than a channel index for a first information bit for encoding fixed frozen bits; and
code for selecting remaining channel indices for encoding dynamic frozen (PCF) bits having values based on one or more of the information bits; and
code for transmitting the encoded stream of bits.
29. The computer readable medium of claim 28, wherein the channel indices are associated with a reliability metric, and wherein the first set of channel indices is determined based on the reliability metric.
30. The computer readable medium of claim 28, wherein the information bits comprise payload bits and cyclic redundancy check (CRC) bits.
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SUMMARY
ClaimChart-US2019372605A1-STO
Patent number:US2019372605A1
Claim Chart Type : SEP Claim Chart
Price: 200 €
Note:
The information in blue was extracted from the third parties (Standard Setting Organisation, Espacenet)
The information in grey was provided by the patent holder
The information in purple was extracted from the FrandAvenue
Explicitly disclosed patent:openly and comprehensibly describes all details of the invention in the patent document.
Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.
Basis patent:The core patent in a family, outlining the fundamental invention from which related patents or applications originate.
Family member:related patents or applications that share a common priority or original filing.