US Patent No. 9,571,236

DOWNLINK CONTROL SIGNALLING TRANSMISSION METHOD AND DEVICE


Patent No. 9,571,236
Issue Date February 14, 2017
Title Downlink Control Signalling Transmission Method And Device
Inventorship Yanan Lin, Beijing (CN)
Zukang Shen, Beijing (CN)
Qianqian Si, Beijing (CN)
Xueming Pan, Beijing (CN)
Assignee China Academy of Telecommunications Technology, Beijing (CN)

Claim of US Patent No. 9,571,236

1. A method of transmitting Downlink Control Information (DCI), applicable to a scenario where a Time Division Duplex (TDD)
carrier and a Frequency Division Duplex (FDD) carrier are aggregated, wherein for transmission of DCI over any current carrier,
the current carrier is a TDD carrier or an FDD carrier to be scheduled, the method comprises:
determining Downlink Assignment Index (DAI) information fields in uplink scheduling DCI and downlink scheduling DCI to be
carried over the current carrier and a Hybrid Automatic Repeat ReQuest (HARQ) process number information field in the downlink
scheduling DCI, dependent upon a duplex mode of a primary carrier, wherein a uplink scheduling DCI to be carried over a current
TDD carrier comprises no DAI field the same as a uplink scheduling DCI carried over a primary FDD carrier, a downlink scheduling
DCI to be carried over the current TDD carrier comprises no DAI field and 3 bits HARQ process number information field the
same as downlink scheduling DCI carried over the primary FDD carrier, or a uplink scheduling DCI to be carried over a current
FDD carrier comprises 2 bits of DAI field the same as a uplink scheduling DCI carried over a primary TDD carrier, a downlink
scheduling DCI to be carried over the current FDD carrier comprises 2 bits of DAI and 4 bits of HARQ process number information
fields the same as a downlink scheduling DCI carried over the primary TDD carrier;

determining an Uplink (UL) index information field in the uplink scheduling DCI to be carried over the current carrier dependent
upon a Physical Uplink Shared Channel (PUSCH) scheduling scheme currently used for the current carrier;

generating the corresponding uplink scheduling DCI and downlink scheduling DCI from results of determining the respective
information fields; and

transmitting the uplink scheduling DCI and the downlink scheduling DCI to UE over the current carrier.