Dual stage channel interleaving for data transmission

• US 10,277,439 B2
• Filed: 04/12/2017
• Issued: 04/30/2019
• Est. Priority Date: 07/18/2016
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Sun, Jing, Chen, Wanshi, Malladi, Durga Prasad, Hosseini, Seyedkianoush, Montojo, Juan, Gaal, Peter, Yoo, Taesang, Wei, Yongbin
• Primary Examiner(s): Choi, Eunsook
• Application Number:
  US15/485,800
• Publication Number:
  US 20180019900A1
• Time in Patent Office: 748 Days
• Field of Search: None
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 27/2601 Multicarrier modulation systems
• CPC Class Codes: H04L 49/201 Multicast operation; Broadcast operation
• CPC Class Codes: H04L 49/3063 Pipelined operation
• CPC Class Codes: H04W 24/02 Arrangements for optimising operational condition

Abstract

Methods, systems, and devices for wireless communication are described that may perform dual stage channel interleaving in which code blocks are interleaved at the code block level and at a symbol level. The interleaved code block data may provide time diversity for the code block data, and the interleaved symbol data may provide frequency diversity for the code block data, thus helping to mitigate narrowband and/or bursty interference. The interleaving within the code block and interleaving within the symbols, in some examples, may allow pipelined implementation of decoding of the code blocks at the receiver, for faster processing. In some cases, systematic data and parity data may be interleaved within the code block data to provide a uniform distribution of the systematic data in time within the code block.

Claims

1. A method for wireless communication, comprising:

identifying code block data to be transmitted in a code block to a receiver;

interleaving the code block data to generate interleaved code block data;

concatenating interleaved code block data from different code blocks sequentially;

allocating the concatenated interleaved code block data into orthogonal frequency division multiplexing (OFDM) symbols sequentially;

interleaving the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol; and

transmitting the OFDM symbols to the receiver.

2. The method of claim 1, wherein interleaving the code block data comprises:

interleaving the code block data comprises interleaving systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block.

3. The method of claim 1, wherein the interleaved code block data provides time diversity for the code block data and the interleaved OFDM symbol data provides frequency diversity for the code block data.

4. The method of claim 1, wherein the code block data comprises turbo code encoded data, low density parity check (LDPC) encoded data, or tail-biting convolutional code (TBCC) encoded data.

5. The method of claim 1, further comprising:

allocating interleaved code block data from multiple code blocks into a plurality of other OFDM symbols;

interleaving, for the plurality of other OFDM symbols, the associated portion of the interleaved code block data to generate interleaved OFDM symbol data for the plurality of other OFDM symbols; and

transmitting the plurality of other OFDM symbols of the code block to the receiver.

6. The method of claim 5, wherein interleaving within the code block and interleaving within the OFDM symbols allow pipelined implementation of decoding of the code blocks at the receiver.

7. The method of claim 5, wherein the allocating comprises:

identifying a resource allocation of wireless resources for transmission of the code blocks, the resource allocation including an allocation of the plurality of OFDM symbols, a plurality of resource elements (REs) within each OFDM symbol, and a set of spatial layers within each RE;

firstly mapping the interleaved code block data to one or more spatial layers within a same RE;

secondly mapping the interleaved code block data to a plurality of REs within an OFDM symbol; and

thirdly mapping the interleaved code block data to the plurality of OFDM symbols.

8. The method of claim 1, further comprising:

receiving, from the receiver, an indication of whether the receiver is capable of supporting two stage channel interleaving; and

performing two stage interleaving to generate the interleaved code block data and the interleaved OFDM symbol data responsive to the receiver indicating that it is capable of supporting two stage interleaving.

9. The method of claim 8, further comprising:

performing a legacy no channel interleaving or single stage channel interleaving in an absence of receiving an indication that the receiver is capable of supporting two stage channel interleaving.

10. The method of claim 1, further comprising:

determining whether the code block data includes broadcast data to be transmitted to a plurality of receivers or unicast data to be transmitted to a single receiver;

performing two stage channel interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data; and

bypassing the interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes broadcast data.

11. A method for wireless communication, comprising:

receiving a plurality of OFDM symbols of a transmitted code block;

demodulating the plurality of OFDM symbols to obtain interleaved OFDM symbol data for the plurality of OFDM symbols;

deinterleaving the interleaved OFDM symbol data for the plurality of OFDM symbols to obtain deinterleaved OFDM symbol data for the plurality of OFDM symbols;

concatenating the deinterleaved OFDM symbol data for the plurality of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block;

deinterleaving the interleaved code block data to obtain deinterleaved code block data; and

decoding the deinterleaved code block data.

12. The method of claim 11, wherein the interleaved code block data comprises interleaved systematic data and parity data within the code block, and wherein the systematic data is uniformly distributed throughout the interleaved code block data.

13. The method of claim 11, wherein the interleaved code block data provides time diversity for the deinterleaved code block data and the interleaved OFDM symbol data provides frequency diversity for the deinterleaved code block data.

14. The method of claim 11, wherein the decoding the deinterleaved code block data comprises decoding of turbo code encoded data, low density parity check (LDPC) encoded data, or tail-biting convolutional code (TBCC) encoded data.

15. The method of claim 11, wherein the decoding the deinterleaved code block data comprises pipelined decoding of the code block.

16. The method of claim 11, further comprising:

transmitting an indication to a transmitter of the transmitted code block that indicates capability for supporting the two stage channel interleaving.

17. The method of claim 16, further comprising:

receiving signaling indicating whether the transmitted code block contains interleaved code block data and interleaved OFDM symbol data;

performing a legacy single stage deinterleaving of parity data within the transmitted code block when the signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data; and

performing the deinterleaving the interleaved OFDM symbol data, concatenating, and deinterleaving the interleaved code block data when the signaling does indicate that the transmitted code block contains interleaved OFDM symbol data.

18. An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

identify code block data to be transmitted in a code block to a receiver;

interleave the code block data to generate interleaved code block data;

concatenate interleaved code block data from different code blocks sequentially;

allocate the concatenated interleaved code block data into orthogonal frequency division multiplexing (OFDM) symbols sequentially;

interleave the concatenated interleaved code block data allocated into each OFDM symbol to generate interleaved OFDM symbol data to be transmitted in each OFDM symbol; and

transmit the OFDM symbols to the receiver.

19. The apparatus of claim 18, wherein the instructions are further executable by the processor to:

interleave systematic data and parity data within the code block data to provide a uniform distribution of the systematic data in time within the code block.

20. The apparatus of claim 18, wherein the interleaved code block data provides time diversity for the code block data and the interleaved OFDM symbol data provides frequency diversity for the code block data.

21. The apparatus of claim 18, wherein the code block data comprises turbo code encoded data, low density parity check (LDPC) encoded data, or tail-biting convolutional code (TBCC) encoded data.

22. The apparatus of claim 18, wherein the instructions are further executable by the processor to:

allocate interleaved code block data from multiple code blocks into a plurality of other OFDM symbols;

interleave, for the plurality of other OFDM symbols, the associated portion of the interleaved code block data to generate interleaved OFDM symbol data for the plurality of other OFDM symbols; and

transmit the plurality of other OFDM symbols of the code block to the receiver.

23. The apparatus of claim 22, wherein interleaving within the code block and interleaving within the OFDM symbols allow pipelined implementation of decoding of the code blocks at the receiver.

24. The apparatus of claim 18, wherein the instructions are further executable by the processor to:

receive, from the receiver, an indication of whether the receiver is capable of supporting two stage channel interleaving; and

perform two stage interleaving to generate the interleaved code block data and the interleaved OFDM symbol data responsive to the receiver indicating that it is capable of supporting two stage interleaving.

25. The apparatus of claim 18, wherein the instructions are further executable by the processor to:

determine whether the code block data includes broadcast data to be transmitted to a plurality of receivers or unicast data to be transmitted to a single receiver;

perform two stage channel interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes unicast data; and

bypass the interleaving to generate the interleaved code block data and the interleaved OFDM symbol data when the code block data includes broadcast data.

26. An apparatus for wireless communication, in a system comprising:

a processor;

memory in electronic communication with the processor; and

instructions stored in the memory and operable, when executed by the processor, to cause the apparatus to;

receive a plurality of OFDM symbols of a transmitted code block;

demodulate the plurality of OFDM symbols to obtain interleaved OFDM symbol data for the plurality of OFDM symbols;

deinterleave the interleaved OFDM symbol data for the plurality of OFDM symbols to obtain deinterleaved OFDM symbol data for the plurality of OFDM symbols;

concatenate the deinterleaved OFDM symbol data for the plurality of OFDM symbols of the transmitted code block to obtain interleaved code block data of the transmitted code block;

deinterleave the interleaved code block data to obtain deinterleaved code block data; and

decode the deinterleaved code block data.

27. The apparatus of claim 26, wherein the interleaved code block data comprises interleaved systematic data and parity data within the code block, and wherein the systematic data is uniformly distributed throughout the interleaved code block data.

28. The apparatus of claim 26, wherein the instructions to decoding the deinterleaved code block data comprises instructions for pipelined decoding of the code block.

29. The apparatus of claim 26, wherein the instructions are further executable by the processor to:

transmit an indication to a transmitter of the transmitted code block that indicates capability for supporting the two stage channel interleaving.

30. The apparatus of claim 29, wherein the instructions are further executable by the processor to:

receive signaling indicating whether the transmitted code block contains interleaved code block data and interleaved OFDM symbol data;

perform a legacy single stage deinterleaving of parity data within the transmitted code block when the signaling does not indicate that the transmitted code block contains interleaved OFDM symbol data; and

perform the deinterleaving the interleaved OFDM symbol data, concatenating, and deinterleaving the interleaved code block data when the signaling does indicate that the transmitted code block contains interleaved OFDM symbol data.