Information transmission method, receiving device, sending device, and system

An information transmission method, wherein the method comprises:

• receiving, by a receiving device, coded data of ith retransmission of a data block, wherein i is an integer greater than 0;
• obtaining, by the receiving device, a transmission count RvCnt(i) of the ith retransmission;
• determining, by the receiving device, a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission;
• combining, by the receiving device, the coded data of the ith retransmission into a virtual circular buffer of the data block based on the redundancy version Rv(i) of the ith retransmission;
• and
• decoding, by the receiving device, combined data in the virtual circular buffer of the data block, wherein the receiving device is a terminal, and the obtaining, by the receiving device, a transmission count RvCnt(i) of the ith retransmission comprises:
• obtaining, by the terminal, the transmission count RvCnt(i) of the ith retransmission based on RvCnt(i)=RvCnt(i−1)+1;
• or
• receiving, by the terminal, scheduling information sent by a base station,
• obtaining, by the terminal, an information bit of the transmission count RvCnt(i) of the ith retransmission from the scheduling information, and
• obtaining, by the terminal, the transmission count RvCnt(i) of the ith retransmission based on the information bit of the transmission count RvCnt(i) of the ith retransmission.

An information transmission method, wherein the method comprises:

• receiving, by a receiving device, coded data of ith retransmission of a data block, wherein i is an integer greater than 0;
• obtaining, by the receiving device, a transmission count RvCnt(i) of the ith retransmission;
• determining, by the receiving device, a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission;
• combining, by the receiving device, the coded data of the ith retransmission into a virtual circular buffer of the data block based on the redundancy version Rv(i) of the ith retransmission;
• and
• decoding, by the receiving device, combined data in the virtual circular buffer of the data block, wherein the determining, by the receiving device, a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission comprises:
• determining, by the receiving device, the redundancy version Rv(i) of the ith retransmission in the following manners:
• Rv(i)=(Rv(i−1)+round((RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv)% Nrv)% Nrv;
• or
• Rv(i)=(Rv(i−1)+└(RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv┘% Nrv)% Nrv;
• or
• Rv(i)=(Rv(i−1)+┌(RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv┐% Nrv)% Nrv, wherein
• if i=1, Rv(0) is a redundancy version of initial transmission of the data block, RvCnt(0) is a transmission count of the initial transmission, and is initially 0, and Rate(0) is a transmission code rate of the initial transmission;
• or
• if i>1, Rv(i−1) is a redundancy version of (i−1)th retransmission, RvCnt(i−1) is a transmission count of the (i−1)th retransmission, and Rate(i−1) is a transmission code rate of the (i−1)th retransmission;
• and
• Nrv is a quantity of redundancy versions;
• round(⋅) represents rounding off;
• % represents performing modulo operation;
• ┌⋅┐ represents rounding up;
• and └⋅┘ represents rounding down.

A device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
• receive coded data of ith retransmission of a data block, wherein i is an integer greater than 0;
• obtain a transmission count RvCnt(i) of the ith retransmission;
• determine a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission obtained by the obtaining unit;
• combine the coded data of the ith retransmission into a virtual circular buffer of the data block based on the redundancy version Rv(i) of the ith retransmission determined by the determining unit;
• and
• decode combined data in the virtual circular buffer of the data block, wherein the programming instructions instruct the processor to obtain the transmission count RvCnt(i) of the ith retransmission in the following manner:
• RvCnt(i)=RvCnt(i−1)+1;
• or
• RvCnt(i)=RvCnt(i−1)+b+coffset,
• wherein b is an integer ranging from 0 to 3, and a value of Coffset is −2, −1, or 0.

A device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
• receive coded data of ith retransmission of a data block, wherein i is an integer greater than 0;
• obtain a transmission count RvCnt(i) of the ith retransmission;
• determine a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission obtained by the obtaining unit;
• combine the coded data of the ith retransmission into a virtual circular buffer of the data block based on the redundancy version Rv(i) of the ith retransmission determined by the determining unit;
• and
• decode combined data in the virtual circular buffer of the data block, wherein the programming instructions instruct the processor to:
• obtain the transmission count RvCnt(i) of the ith retransmission based on RvCnt(i)=RvCnt(i−1)+1;
• or
• receive scheduling information, and
• obtain an information bit of the transmission count RvCnt(i) of the ith retransmission from the scheduling information, and obtain the transmission count RvCnt(i) of the ith retransmission based on the information bit of the transmission count RvCnt(i) of the ith retransmission.

A device, comprising:

• a processor;
• and
• a non-transitory computer-readable storage medium coupled to the processor and storing programming instructions for execution by the processor, the programming instructions instruct the processor to:
• receive coded data of ith retransmission of a data block, wherein i is an integer greater than 0;
• obtain a transmission count RvCnt(i) of the ith retransmission;
• determine a redundancy version Rv(i) of the ith retransmission based on the transmission count RvCnt(i) of the ith retransmission obtained by the obtaining unit;
• combine the coded data of the ith retransmission into a virtual circular buffer of the data block based on the redundancy version Rv(i) of the ith retransmission determined by the determining unit;
• and
• decode combined data in the virtual circular buffer of the data block, wherein the programming instructions instruct the processor to determine the redundancy version Rv(i) of the ith retransmission in the following manners:
• Rv(i)=(Rv(i−1)+round((RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv)% Nrv)% Nrv;
• or
• Rv(i)=(Rv(i−1)+└(RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv┘% Nrv)% Nrv;
• or
• Rv(i)=(Rv(i−1)+┌(RvCnt(i)−RvCnt(i−1))·1/(Rate(i−1)·3.0)·Nrv┐% Nrv)% Nrv, wherein
• if i=1, Rv(0) is a redundancy version of initial transmission of the data block, RvCnt(0) is a transmission count of the initial transmission, and is initially 0, and Rate(0) is a transmission code rate of the initial transmission;
• or if i>1, Rv(i−1) is a redundancy version of (i−1)th retransmission, RvCnt(i−1) is a transmission count of the (i−1)th retransmission, and Rate(i−1) is a transmission code rate of the (i−1)th retransmission;
• and
• Nrv is a quantity of redundancy versions;
• round(⋅) represents rounding off;
• % represents performing modulo operation;
• ┌⋅┐ represents rounding up;
• and └⋅┘ represents rounding down.