Patent ID: 11936572
Assignee: HUAWEI TECHNOLOGIES CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A communication apparatus, comprising:
at least one processor, and
one or more memories coupled to the at least one processor and storing programming instructions thereon, which when executed by the at least one processor, cause the communication apparatus to perform operations comprising:
receiving downlink information by using a secondary component carrier;
sending feedback information for the downlink information by using a primary component carrier, wherein based on the primary component carrier or the secondary component carrier being a time division duplex (TDD) carrier in a carrier aggregation system and the carrier aggregation system comprising the TDD carrier and a frequency division duplex (FDD) carrier, at least one first subframe exists in the TDD carrier, wherein the first subframe comprises P consecutive short transmission time intervals (sTTIs), and at least one sTTI that occupies two orthogonal frequency division multiplexing (OFDM) symbols exists in the P consecutive sTTIs, wherein P is an integer greater than 1, and wherein the first subframe comprises an sTTI that occupies two OFDM symbols and an sTTI that occupies three OFDM symbols; and
based on the secondary component carrier being the TDD carrier and the primary component carrier being the FDD carrier, the receiving downlink information by using the secondary component carrier comprises:
receiving the downlink information by using a first sTTI in the first subframe of the secondary component carrier, wherein the first sTTI is one of the P consecutive sTTIs, and wherein the sending feedback information for the downlink information by using a primary component carrier comprises:
sending the feedback information for the downlink information by using a second sTTI of the primary component carrier, wherein a timing relationship exists between the second sTTI and the first sTTI.