RESOURCE MAPPING TO HANDLE BURSTY INTERFERENCE

• US 20150067435A1
• Filed: 08/28/2014
• Published: 03/05/2015
• Est. Priority Date: 08/30/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Yerramalli, Srinivas, Luo, Tao, Malladi, Durga Prasad, Bhushan, Naga, Wei, Yongbin, Ji, Tingfang, Damnjanovic, Aleksandar, Chen, Wanshi
• Granted Patent: US 9,634,802 B2
• Time in Patent Office: Days
• US Class Current: 714/748
• CPC Class Codes: H04L 1/0006 by adapting the transmission format
• CPC Class Codes: H04L 1/0034 where the transmitter decides based on inferences, e.g. use of implicit signalling
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 1/1893 Physical mapping arrangements physical resource mapping in general H04L5/00
• CPC Class Codes: H04L 27/3488 Multiresolution systems
• CPC Class Codes: H04L 5/001 the frequencies being arranged in component carriers
• CPC Class Codes: H04L 5/0044 allocation of payload
• CPC Class Codes: H04L 5/0073 Allocation arrangements that take into account other cell interferences for intercell interference mitigation or co-ordination in orthogonal multiplex systems H04J11/005
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

Resource mapping and coding schemes to handle bursty interference are disclosed that provide for spreading the modulated symbols for one or more transmission code words over more symbols in the time-frequency transmission stream. Certain aspects allow for the modulated symbols to be based on bits from more than one code word. Other aspects also provide for re-mapping code word transmission sequences for re-transmissions based on the number of re-transmissions requested by the receiver. Additional aspects provide for layered coding that uses a lower fixed-size constellation to encode/decode transmissions in a layered manner in order to achieve a larger-size constellation encoding. The layered encoding process allows the transmitter and receiver to use different coding rates for each coding layer. The layered encoding process also allows interference from neighboring cells to be canceled without knowledge of the actual constellation used to code the interfering neighboring signal.

Claims

1. A method of wireless communication, comprising:

encoding, at a transmitter, a plurality of bits for one or more code blocks of a transmission;

interleaving, by the transmitter, the plurality of bits of each of the one or more code blocks across two or more symbols in a time-frequency transmission stream; and

transmitting, by the transmitter to a receiver, the time-frequency transmission stream.

2. The method of claim 1, wherein the interleaving includes:

sequentially arranging the plurality of bits of each of the one or more code blocks in time from a first symbol of a plurality of symbols at a first frequency of a subframe of the time-frequency transmission stream to a last symbol of the plurality of symbols at the first frequency;

sequentially arranging remaining bits of the plurality of bits for each of the one or more code blocks in time from the first symbol of the plurality of symbols at a next frequency of the subframe to the last symbol of the plurality of symbols at the next frequency of the subframe; and

continuing the sequentially arranging from the first symbol to the last symbol of the plurality of symbols for each of the plurality of frequencies of the subframe until all of the plurality of bits have been arranged.

3. The method of claim 1, wherein the interleaving includes:

interleaving the plurality of bits of each of the one or more code blocks in time and frequency across a plurality of symbols of a subframe of the time-frequency transmission stream, wherein the plurality of bits of each one of the one or more code blocks is arranged across the two or more symbols of the plurality of symbols of the subframe and across two or more frequencies of a plurality of frequencies of the subframe.

4. The method of claim 1, wherein the interleaving includes:

interleaving the plurality of bits of each of the one or more code blocks across two or more subframes of the time-frequency transmission stream.

5. The method of claim 1, wherein the time-frequency transmission stream is transmitted according to a first code block transmission sequence of a plurality of code block transmission sequences.

6. The method of claim 5, further including:

re-transmitting, by the transmitter in response to a receiver failing to successfully receive the time-frequency transmission stream, the time-frequency transmission stream at a second code block transmission sequence of the plurality of code block transmission sequences, wherein the second code block transmission sequence is selected by the transmitter according to a number of times the receiver fails to successfully receive the time-frequency transmission stream.

7. A method of wireless communication, comprising:

receiving, at a receiver, a time-frequency transmission stream from a transmitter;

de-interleaving, by the receiver, a plurality of bits of each of one or more code blocks interleaved across two or more symbols in the time-frequency transmission stream; and

decoding, at the receiver, the plurality of bits of the one or more code blocks into a transmission from the transmitter.

8. The method of claim 7, wherein the de-interleaving includes:

sequentially selecting the plurality of bits of each of the one or more code blocks in time from a first symbol of a plurality of symbols at a first frequency of a subframe of the time-frequency transmission stream to a last symbol of the plurality of symbols at the first frequency;

sequentially selecting remaining bits of the plurality of bits for each of the one or more code blocks in time from the first symbol of the plurality of symbols at a next frequency of the subframe to the last symbol of the plurality of symbols at the next frequency of the subframe; and

continuing the sequentially selecting from the first symbol to the last symbol of the plurality of symbols for each of the plurality of frequencies of the subframe until all of the plurality of bits have been selected.

9. The method of claim 7, wherein the de-interleaving includes:

de-interleaving the plurality of bits of each of the one or more code blocks in time and frequency across a plurality of symbols of a subframe of the time-frequency transmission stream, wherein the plurality of bits of each one of the one or more code blocks is selected from across the two or more symbols of the plurality of symbols of the subframe and from across two or more frequencies of a plurality of frequencies of the subframe.

10. The method of claim 7, further including:

decoding, at the receiver, less than a plurality of code blocks of a transmission included in a first sequence in the time-frequency transmission stream;

transmitting, by the receiver, a negative acknowledgement to the transmitter, in response to decoding less than the plurality of code blocks;

receiving, at the receiver, a retransmission of the time-frequency transmission stream from the transmitter including the plurality of code blocks, wherein the plurality of code blocks in the retransmission is arranged in a second sequence different than the first sequence.

11. The method of claim 10, further including:

decoding, at the receiver, less than the plurality of code blocks included in the retransmission;

transmitting, by the receiver, another negative acknowledgement to the transmitter, in response to decoding less than the plurality of code blocks in the retransmission and when one or more of the plurality of code blocks decoded in the transmission and one or more of the plurality of code blocks decoded in the retransmission are less than the plurality of code blocks.

12. An apparatus configured for wireless communication, the apparatus comprising:

at least one processor; and

a memory coupled to the at least one processor,

wherein the at least one processor is configured;

to encode, at a transmitter, a plurality of bits for one or more code blocks of a transmission;

to interleave, by the transmitter, the plurality of bits of each of the one or more code blocks across two or more symbols in a time-frequency transmission stream; and

to transmit, by the transmitter to a receiver, the time-frequency transmission stream.

13. The apparatus of claim 12, wherein the configuration of the at least one processor to interleave includes configuration of the at least one processor:

to sequentially arrange the plurality of bits of each of the one or more code blocks in time from a first symbol of a plurality of symbols at a first frequency of a subframe of the time-frequency transmission stream to a last symbol of the plurality of symbols at the first frequency;

to sequentially arrange remaining bits of the plurality of bits for each of the one or more code blocks in time from the first symbol of the plurality of symbols at a next frequency of the subframe to the last symbol of the plurality of symbols at the next frequency of the subframe; and

to continue the configuration to sequentially arrange from the first symbol to the last symbol of the plurality of symbols for each of the plurality of frequencies of the subframe until all of the plurality of bits have been arranged.

14. The apparatus of claim 12, wherein the configuration of the at least one processor interleave includes configuration to interleave the plurality of bits of each of the one or more code blocks in time and frequency across a plurality of symbols of a subframe of the time-frequency transmission stream, wherein the plurality of bits of each one of the one or more code blocks is arranged across the two or more symbols of the plurality of symbols of the subframe and across two or more frequencies of a plurality of frequencies of the subframe.

15. The apparatus of claim 12, wherein the configuration of the at least one processor to interleave includes configuration to interleave the plurality of bits of each of the one or more code blocks across two or more subframes of the time-frequency transmission stream.

16. The apparatus of claim 12, wherein the time-frequency transmission stream is transmitted according to a first code block transmission sequence of a plurality of code block transmission sequences.

17. The apparatus of claim 16, further including configuration of the at least one processor to re-transmit, by the transmitter in response to a receiver failing to successfully receive the time-frequency transmission stream, the time-frequency transmission stream at a second code block transmission sequence of the plurality of code block transmission sequences, wherein the second code block transmission sequence is selected by the transmitter according to a number of times the receiver fails to successfully receive the time-frequency transmission stream.

18. A non-transitory computer-readable medium having program code recorded thereon, the program code comprising:

program code for causing a computer to encode, at a transmitter, a plurality of bits for one or more code blocks of a transmission;

program code for causing the computer to interleave, by the transmitter, the plurality of bits of each of the one or more code blocks across two or more symbols in a time-frequency transmission stream; and

program code for causing the computer to transmit, by the transmitter to a receiver, the time-frequency transmission stream.

19. The non-transitory computer-readable medium of claim 18, wherein the program code for causing the computer to interleave includes:

program code for causing the computer to sequentially arrange the plurality of bits of each of the one or more code blocks in time from a first symbol of a plurality of symbols at a first frequency of a subframe of the time-frequency transmission stream to a last symbol of the plurality of symbols at the first frequency;

program code for causing the computer to sequentially arrange remaining bits of the plurality of bits for each of the one or more code blocks in time from the first symbol of the plurality of symbols at a next frequency of the subframe to the last symbol of the plurality of symbols at the next frequency of the subframe; and

program code for causing the computer to continue executing the program code for causing the computer to sequentially arrange from the first symbol to the last symbol of the plurality of symbols for each of the plurality of frequencies of the subframe until all of the plurality of bits have been arranged.

20. The non-transitory computer-readable medium of claim 18, wherein the program code for causing the computer to interleave includes:

program code for causing the computer to interleave the plurality of bits of each of the one or more code blocks in time and frequency across a plurality of symbols of a subframe of the time-frequency transmission stream, wherein the plurality of bits of each one of the one or more code blocks is arranged across the two or more symbols of the plurality of symbols of the subframe and across two or more frequencies of a plurality of frequencies of the subframe.

21. The non-transitory computer-readable medium of claim 18, wherein the program code for causing the computer to interleave includes:

program code for causing the computer to interleave the plurality of bits of each of the one or more code blocks across two or more subframes of the time-frequency transmission stream.

22. The non-transitory computer-readable medium of claim 18, wherein the time-frequency transmission stream is transmitted according to a first code block transmission sequence of a plurality of code block transmission sequences.

23. The non-transitory computer-readable medium of claim 22, further including:

program code for causing the computer to re-transmit, by the transmitter in response to a receiver failing to successfully receive the time-frequency transmission stream, the time-frequency transmission stream at a second code block transmission sequence of the plurality of code block transmission sequences, wherein the second code block transmission sequence is selected by the transmitter according to a number of times the receiver fails to successfully receive the time-frequency transmission stream.