Method and apparatus for coding of HARQ-ACK transmission in TDD systems with downlink carrier aggregation

Patent metadata

Field	Value
Publication number	US-9419778-B2
Application number	US-201514822457-A
Country	US
Kind code	B2
Filing date	Aug 10, 2015
Priority date	Nov 3, 2010
Publication date	Aug 16, 2016
Grant date	Aug 16, 2016

Abstract

Methods and apparatus are provided for a User Equipment (UE) configured with multiple cells in a DownLink (DL) of a Time Division Duplex (TDD) communication system to determine the coding method for acknowledgement information bits as a function of their number, to apply bundling to the acknowledgement information bits when their number exceeds a first predetermined value, and to partition the acknowledgement information bits, possibly together with other control information bits, into two separate codewords when their total number exceeds a second predetermined value.

First claim

What is claimed is:

1. A method for encoding acknowledgement information bits by a user equipment (UE) in a wireless communication system, the method comprising:
generating the acknowledgement information bits for each of a plurality of subframes for each of a plurality of cells configured for the UE, wherein one acknowledgement information bit in one subframe is generated for each cell configured with a transmission mode (TM) that conveys one data transport block (TB), and wherein two acknowledgement information bits in one subframe are generated for each cell configured with a TM conveying two data TBs;
placing the acknowledgement information bits corresponding to the plurality of cells into a first code and a second code in an alternating manner, if a total number of the acknowledgement information bits are greater than a predetermined value; and
encoding the first code and the second code.

2. The method of claim 1 , wherein transmission of the acknowledgement information bits is performed on a physical uplink shared channel.

3. The method of claim 1 , wherein transmission of the acknowledgement information bits is performed on an physical uplink control channel.

4. The method of claim 1 , wherein transmission of the acknowledgement information bits is performed in one of the plurality of cells configured for the UE.

5. The method of claim 1 , wherein the UE is informed of a number of the plurality of subframes by at least one scheduling assignment transmitted from the base station.

6. The method of claim 1 , further comprising:
placing the acknowledgement information bits and other uplink (UL) control information bits into a third code and a fourth code in the alternating manner, if the other uplink control information bits are appended to the acknowledgement information bits and a total number of the acknowledgement information bits and the other UL control information bits are greater than the predetermined value.

7. A user equipment (UE) in a wireless communication system, the UE comprising:
a transceiver configured to transmit/receive data; and
a controller configured to:
generate the acknowledgement information bits for each of a plurality of subframes for each of a plurality of cells configured for the UE, wherein one acknowledgement information bit in one subframe is generated for each cell configured with a transmission mode (TM) that conveys one data transport block (TB), and wherein two acknowledgement information bits in one subframe are generated for each cell configured with a TM conveying two data TBs,
place the acknowledgement information bits corresponding to the plurality of cells into a first code and a second code in an alternating manner, if a total number of acknowledgement information bits are greater than a predetermined value, and
encode the first code and the second code.

8. The UE of claim 7 , wherein transmission of the acknowledgement information bits is performed on a physical uplink shared channel.

9. The UE of claim 7 , wherein transmission of the acknowledgement information bits is performed on an physical uplink control channel.

10. The UE of claim 7 , wherein transmission of the acknowledgement information bits is performed in one of the plurality of cells configured for the UE.

11. The UE of claim 7 , wherein the UE is informed of a number of the plurality of subframes by at least one scheduling assignment transmitted from the base station.

12. The UE of claim 7 , wherein the controller is further configured to place the acknowledgement information bits and other UL control information bits into a third code and a fourth code in the alternating manner, if the other uplink control information bits are appended to the acknowledgement information bits and a total number of the acknowledgement information bits and the other UL control information bits are greater than the predetermined value.

Assignees

• Samsung Electronics Co Ltd
• Samsung Electronics Co Ltd

Inventors

• Papasakellariou Aris
• Cho Joon-Young

Classifications

• H04L5/14 Primary

  Two-way operation using the same type of signal, i.e. duplex · CPC title

• H04L1/1614 Primary

  using bitmaps · CPC title

• H04J3/00

  Time-division multiplex systems (H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q) · CPC title

• H04L1/1861

  Physical mapping arrangements (for ACK signaling see also H04L5/0053) · CPC title

• H04L5/00

  Arrangements affording multiple use of the transmission path · CPC title