Transmission method and apparatus in TDD-FDD joint system

Patent metadata

Field	Value
Publication number	US-9973324-B2
Application number	US-201414915191-A
Country	US
Kind code	B2
Filing date	Aug 5, 2014
Priority date	Aug 26, 2013
Publication date	May 15, 2018
Grant date	May 15, 2018

Abstract

The present invention provides a transmission method and apparatus in a TDD-FDD joint system. In an embodiment of cross-carrier scheduling, an HARQ time sequence of a PUSCH on a scheduled CC complies with a time sequence of a TDD system, and an HARQ time sequence of a PDSCH on the scheduled CC complies with a time sequence of an FDD system; if an uplink reference frame structure on the scheduled CC is #0, uplink-scheduling DCI of the scheduled CC comprises ULI/DAI bits; and if the uplink reference frame structure on the scheduled CC is one of #1 to #6, the uplink-scheduling DCI of the scheduled CC does not comprise the ULI/DAI bits. By using the technical solutions provided in the present invention, redundant overheads of the DCI are reduced, the coverage of the DCI is enlarged, and meanwhile, the compatibility with an existing system is kept to the greatest degree in the present invention.

First claim

What is claimed is:

1. A transmission method used in UE for a TDD-FDD joint system, comprising:
Step A: receiving a first DCI on the subframe n on a first carrier, wherein the first carrier is a FDD downlink carrier, n is an integer, and the first DCI is the uplink-scheduling DCI; and
Step B: transmitting the uplink data on PUSCH of a second carrier in the subframe n+k according to the scheduling of the first DCI, wherein the second carrier is a TDD carrier, k is the uplink scheduling delay of the uplink reference frame configuration of the second carrier on the subframe n;
wherein for frame configuration #{0, 1, 2, 3, 4, 5, 6}, the first DCI comprises ULI and DAI bits only when the uplink reference frame configuration is configuration #0.

2. The transmission method used in UE for a TDD-FDD joint system according to claim 1 , wherein the Step A comprises the following step A1, and the Step B comprises the following Step B1:
Step A1: in the jth subframe before the subframe n+k of the second carrier, receiving at least one of the following:
PDSCH data;
PDCCH indicating SPS release;
EPDCCH indicating SPS release;
Step B1: transmitting ACK/NACK associating with the Step A1 on the PUSCH;
wherein j is an uplink scheduling delay of the FDD system.

3. The transmission method used in UE for a TDD-FDD joint system according to claim 1 , wherein the method comprises the following steps:
Step C: for the uplink data, detecting the PHICH information in the sth subframe after the subframe n+k on the first carrier, wherein s is the PHICH reporting delay corresponding to the uplink reference frame configuration;
Step D: transferring ACK information to higher layers when the PHICH is detected as ACK, or when no PHICH is detected.

4. The transmission method used in UE for a TDD-FDD joint system according to claim 1 , wherein a padding bit of the first DCI is added according to the LTE scheme, wherein the corresponding downlink DCI is counted according to the payload size of the cross-carrier scheduling performed in the FDD system for the second carrier.

5. The transmission method used in UE for a TDD-FDD joint system according to claim 1 , wherein the uplink reference frame configuration of the second carrier is configured by the SIB of the second carrier.

6. A transmission method used in a system equipment for a TDD-FDD joint system, comprising:
Step A: transmitting a first DCI on the subframe n on a first carrier, wherein the first carrier is a FDD downlink carrier, n is an integer, and the first DCI is the uplink-scheduling DCI; and
Step B: receiving the uplink data on PUSCH of a second carrier in the subframe n+k according to the scheduling of the first DCI, wherein the second carrier is a TDD carrier, k is the uplink scheduling delay of the uplink reference frame configuration of the second carrier on the subframe n;
wherein for frame configuration #{0, 1, 2, 3, 4, 5, 6}, the first DCI comprises ULI and DAI bits only when the uplink reference frame configuration is frame configuration #0.

7. The transmission method used in a system equipment for a TDD-FDD joint system according to claim 6 , wherein the Step A comprises the following Step A1, and the Step B comprises the following Step B1:
Step A1: in the jth subframe before the subframe n+k of the second carrier, transmitting at least one of the following:
PDSCH data;
PDCCH indicating SPS release;
EPDCCH indicating SPS release;
Step B1: receiving ACK/NACK associating with the Step A1 on the PUSCH;
wherein j is an uplink scheduling delay of the FDD system.

8. The transmission method used in a system equipment for a TDD-FDD joint system according to claim 6 , wherein the method comprises the following steps:
Step C: the higher layer transferring the ACK information associating with the uplink data; and
Step D: Transmitting ACK or maintaining zero power in the corresponding PHICH resource in the sth subframe after the subframe n+k on the first carrier;
wherein the s is the PHICH reporting delay corresponding to the uplink reference frame configuration.

9. The transmission method used in a system equipment for a TDD-FDD joint system according to claim 6 , a padding bit of the first DCI is added according to the LTE scheme, wherein the corresponding downlink DCI is counted according to the payload size of the cross-carrier scheduling performed in the FDD system for the second carrier.

10. The transmission method used in a system equipment for TDD-FDD joint system according to claim 6 , wherein the uplink reference frame configuration of the second carrier is configured by the SIB of the second carrier.

11. A user equipment in the TDD-FDD joint system, comprising:
a first module for receiving a first DCI on the subframe n on a first carrier, wherein the first carrier is a FDD downlink carrier, n is an integer, and the first DCI is the uplink-scheduling DCI; and
a second module for transmitting the uplink data on PUSCH of a second carrier in the subframe n+k according to the scheduling of the first DCI, wherein the second carrier is a TDD carrier, k is the uplink scheduling delay of the uplink reference frame configuration of the second carrier on the subframe n;
wherein for frame configuration #{0, 1, 2, 3, 4, 5, 6}, the first DCI comprises ULI and DAI bits only when the uplink reference frame configuration is configuration #0.

12. A system equipment in the TDD-FDD joint system, comprising:
a first module for transmitting a first DCI on the subframe n on a first carrier, wherein the first carrier is a FDD downlink carrier, n is an integer, and the first DCI is the uplink-scheduling DCI; and
a second module for receiving the uplink data on PUSCH of a second carrier in the subframe n+k according to the scheduling of the first DCI, wherein the second carrier is a TDD carrier, k is the uplink scheduling delay of the uplink reference frame configuration of the second carrier on the subframe n;
wherein for frame configuration #{0, 1, 2, 3, 4, 5, 6}, the first DCI comprises ULI and DAI bits only when the uplink reference frame configuration is configuration #0.

Assignees

• Shanghai Langbo Comm Tech Co Ltd

Inventors

• Shi Fei

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04L1/1854

  Scheduling and prioritising arrangements · CPC title

• H04L5/001

  the frequencies being arranged in component carriers · CPC title

• H04L5/0094

  Indication of how sub-channels of the path are allocated · CPC title

• H04L5/14 Primary

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