Uplink control information transmission method, user equipment, and base station

Patent metadata

Field	Value
Publication number	US-2016100398-A1
Application number	US-201514971668-A
Country	US
Kind code	A1
Filing date	Dec 16, 2015
Priority date	Jun 17, 2013
Publication date	Apr 7, 2016
Grant date	—

Abstract

Embodiments of the present invention provide an uplink control information transmission method, user equipment, and a base station. In a first uplink demodulation reference signal (UL DMRS) pattern, resource elements (Res) in one orthogonal frequency division multiplexing (OFDM) symbol in an uplink subframe are used to carry the UL DMRS. The method includes: mapping, by user equipment (UE), uplink control information (UCI) to REs in the uplink subframe according to the first UL DMRS pattern, where an OFDM symbol in which the REs carrying the UCI are located is adjacent to the OFDM symbol in which the REs carrying the UL DMRS are located; and sending, by the UE to a base station, the uplink subframe that carries the UCI.

First claim

What is claimed is:

1 . An uplink control information transmission method, wherein in a first uplink demodulation reference signal (UL DMRS) pattern, resource elements (REs) in one orthogonal frequency division multiplexing (OFDM) symbol in an uplink subframe are used to carry the UL DMRS, the method comprising:
mapping, by user equipment (UE), uplink control information (UCI) to REs in the uplink subframe according to the first UL DMRS pattern, wherein an OFDM symbol in which the REs carrying the UCI are located is adjacent to the OFDM symbol in which the REs carrying the UL DMRS are located; sending, by the UE to a base station, the uplink subframe that carries the UCI, wherein the UCI comprises: a rank indication (RI), and at least one of an acknowledgement (ACK) and a negative acknowledgement (NACK) wherein in the uplink subframe, the RI is carried on REs in the following at least two first OFDM symbols: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol, the 7th OFDM symbol, the 8th OFDM symbol, and the 9th OFDM symbol; and wherein in the uplink subframe, at least one of the ACK and the NACK is carried on REs in the following at least two second OFDM symbols: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol, the 7th OFDM symbol, the 8th OFDM symbol, and the 9th OFDM symbol.

2 . The method according to claim 1 , wherein mapping, by the UE, the UCI to the REs in the uplink subframe according to the first UL DMRS pattern comprises:
mapping, by the UE, the RI to the REs in the first OFDM symbols; mapping, by the UE, the at least one of the ACK and the NACK to the REs in the second OFDM symbols; and mapping, by the UE, at least one of a channel quality indicator (CQI), a precoding matrix indicator (PMI), and data on a physical uplink shared channel (PUSCH) to a first RE, wherein the first RE is an RE that carries no UL DMRS, carries no RI, and carries no ACK or NACK.

3 . The method according to claim 2 , wherein:
mapping, by the UE, the RI to the REs in the first OFDM symbols comprises:
according to a set order, first mapping, by the UE, a first part of the RI to an RE in the 2nd OFDM symbol in the uplink subframe and an RE in the 6th OFDM symbol in the uplink subframe, and then mapping a second part, except the first part, of the RI to an RE in the 1st OFDM symbol in the uplink subframe and an RE in the 7th OFDM symbol in the uplink subframe; and
mapping, by the UE, the at least one of the ACK and the NACK to the REs in the second OFDM symbols comprises:
according to the set order, first mapping, by the UE, a first part of the at least one of the ACK and the NACK to an RE in the 3rd OFDM symbol in the uplink subframe and an RE in the 5th OFDM symbol in the uplink subframe, and then mapping a second part, except the first part, of the at least one of the ACK and the NACK to REs, in the 1st OFDM symbol and the 7th symbol that are in the uplink subframe, that carry no RI.

4 . The method according to claim 2 , wherein:
mapping, by the UE, the RI to the REs in the first OFDM symbols comprises:
according to a set order, first mapping, by the UE, a first part of the RI to an RE in the 2nd OFDM symbol in the uplink subframe and an RE in the 6th OFDM symbol in the uplink subframe, and then mapping a second part, except the first part, of the RI to an RE in the 1st OFDM symbol in the uplink subframe and an RE in the 7th OFDM symbol in the uplink subframe; and
mapping, by the UE, the at least one of the ACK and the NACK to the REs in the second OFDM symbols comprises:
mapping, by the UE according to the set order, the at least one of the ACK and the NACK to an RE that is in the 1st OFDM symbol in the uplink subframe and that carries no RI, an RE that is in the 3rd OFDM symbol in the uplink subframe and that carries no RI, an RE that is in the 5th OFDM symbol in the uplink subframe and that carries no RI, and an RE that is in the 7th OFDM symbol in the uplink subframe and that carries no RI.

5 . The method according to claim 1 , wherein mapping, by user equipment UE, the UCI to the REs in the uplink subframe according to the UL DMRS pattern comprises:
mapping, by the UE, the RI to the REs in the first OFDM symbols; mapping, by the UE, at least one of a channel quality indicator (CQI), a precoding matrix (PMI), and data on a physical uplink shared channel (PUSCH) to an RE that carries neither UL DMRS nor RI; and mapping, by the UE, the at least one of the ACK and the NACK to the REs in the second OFDM symbols, and overwriting at least one of the CQI, the PMI, and the data on the PUSCH that are carried on the REs in the second OFDM symbols.

6 . The method according to claim 5 , wherein:
mapping, by the UE, the RI to the REs in the first OFDM symbols comprises:
according to a set order, first mapping, by the UE, a first part of the RI to an RE in the 2nd OFDM symbol in the uplink subframe and an RE in the 6th OFDM symbol in the uplink subframe, and then mapping a second part, except the first part, of the RI to an RE in the 1st OFDM symbol in the uplink subframe and an RE in the 7th OFDM symbol in the uplink subframe; and
mapping, by the UE, the at least one of the ACK and the NACK to the REs in the second OFDM symbols, and overwriting at least one of the CQI, the PMI, and the data on the PUSCH that are carried on the REs in the second OFDM symbols comprises:
according to the set order, first mapping, by the UE, a first part of the at least one of the ACK and the NACK to an RE in the 3rd OFDM symbol in the uplink subframe and an RE in the 5th OFDM symbol in the uplink subframe, then mapping a second part, except the first part, of the at least one of the ACK and the NACK to REs, in the 1st OFDM symbol and the 7th symbol that are in the uplink subframe, that carry no RI, and overwriting the at least one of the CQI, the PMI, and the data on the PUSCH that are carried on the RE in the 1st OFDM symbol, the RE in the 3rd OFDM symbol, the RE in the 5th OFDM symbol, and the RE in the 7th OFDM symbol.

7 . User equipment (UE), wherein in a first uplink demodulation reference signal (UL DMRS) pattern, resource elements (Res) in one orthogonal frequency division multiplexing (OFDM) symbol in an uplink subframe are used to carry the UL DMRS, the UE comprising:
a processor, configured to map uplink control infamiation (UCI) to REs in the uplink subframe according to the first UL DMRS pattern, wherein an OFDM symbol in which the REs carrying the UCI are located is adjacent to the OFDM symbol in which the REs carrying the UL DMRS are located; a transmitter, configured to send, to a base station, the uplink subframe that carries the UCI and that is obtained by the processor, wherein the UCI comprises: a rank indication (RI), and at least one of an acknowledgement (ACK) and a negative acknowledgement (NACK); wherein in the uplink subframe, the RI is carried on REs in the following at least two first OFDM symbols: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol, the 7th OFDM symbol, the 8th OFDM symbol, and the 9th OFDM symbol; and wherein in the uplink subframe, at least one of the ACK and the NACK is carried on REs in the following at least two second OFDM symbols: the 1st OFDM symbol, the 2nd OFDM symbol, the 3rd OFDM symbol, the 5th OFDM symbol, the 6th OFDM symbol, the 7th OFDM symbol, the 8th OFDM symbol, and the 9th OFDM symbol.

8 . The UE according to claim 7 , wherein the processor is configured to:
map the RI to the REs in the first OFDM symbols; map the at least one of the ACK and the NACK to the REs in the second OFDM symbols; and map at least one of a channel quali

Assignees

• Huawei Tech Co Ltd

Inventors

• Xia Yuan
• Xia Liang
• Ma Sha

Classifications

• H04L5/0053 Primary

  Allocation of signalling, i.e. of overhead other than pilot signals · CPC title

• H04W72/21 Primary

  in the uplink direction of a wireless link, i.e. towards the network · CPC title

• H04L5/0051

  of dedicated pilots, i.e. pilots destined for a single user or terminal · CPC title

• H04W72/044

  based on the type of the allocated resource · CPC title

• H04L27/2613

  Structure of the reference signals · CPC title