Method for sending hybrid automatic repeat request-acknowledge character (HARQ-ACK) feedback information
A technology of feedback information and sending method, which is applied in the field of sending feedback information of hybrid automatic retransmission request, and can solve the problems of no implementation method, adjacent frequency interference, etc.
Inactive Publication Date: 2013-07-17
BEIJING SAMSUNG TELECOM R&D CENT +1
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[0012] The above method for sending HARQ-ACK feedback information realizes the support of the HARQ mechanism in the existing TDD system that adopts CA, and multiple Cells in CA adopt the same uplink and downlink configuration; however, in some cases, each Cell in CA Adjacent frequencies may have deployed different TDD uplink and downlink configurations (for example, adjacent frequencies have different TD-SCDMA configurations). In fact, when the frequency domain distance between multiple Cells that make up CA is large enough, these Cells can completely adopt different TDD uplink and downlink configurations without interfering with each other; therefore, currently in LTE-A TDD system In the follow-up research, how to effectively implement the HARQ mechanism under the condition that the TDD uplink and downlink configurations of multiple cells of CA are different has become an important research topic.
Then what comes with it is how the UE sends HARQ-ACK feedback information to support the HARQ mechanism in this case; and for this technical problem, there is no specific implementation method yet
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[0025] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.
[0026] The present invention is mainly aimed at the TDD system configured with CA, and the TDD uplink and downlink configurations of multiple Cells of the base station are different, and the UE accessing the base station is configured to work in one Cell or multiple (part or all) Cells in CA .
[0027] In this case, the present invention determines the HARQ-ACK feedback information that needs to be sent on the PUSCH for the UE (it may be the PUSCH of the primary Cell or the PUSCH of the secondary Cell), and the timing relationship and HARQ-ACK feedback information sent on the PUSCH The ACK bundling window configuration is consistent with the timing relationship when sending on the PUCCH (PUCCH is only in the primary Cell) and the HARQ-ACK bundling windo...
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An embodiment of the invention discloses a method for sending HARQ-ACK feedback information. The method is used for configuring different conditions for time division duplex (TDD) uplink and downlink of a plurality of component carriers (CCs) in carrier aggregation (CA). The method is characterized by comprising that user equipment (UE) receives physical downlink shared channel (PDSCH) data which is sent by a base station and scheduled by a physical downlink control channel (PDCCH), generates HARQ-ACK feedback information according to the received PDCCH and the PDSCH data, and sends the HARQ-ACK feedback information on a physical uplink control channel or the PUSCH according to an HARQ-ACK bound window configuration and timing relation determined when transmission of the HARQ-ACK feedback information on the PUCCH is required.
Description
technical field [0001] The present invention relates to the technical field of wireless communication systems, in particular to a method for sending hybrid automatic repeat request (HARQ-ACK) feedback information. Background technique [0002] The Long Term Evolution (LTE) system supports two duplex modes of Frequency Division Duplex (FDD) and Time Division Duplex (TDD). figure 1 It is the frame structure of the TDD system. The length of each radio frame is 10ms, which is equally divided into two half-frames with a length of 5ms. Each half-frame contains 8 time slots with a length of 0.5ms and 3 special domains, namely downlink pilot time slot (DwPTS), guard interval (GP) and uplink pilot time slot (UpPTS), these 3 special domains The sum of the lengths is 1ms. Each subframe consists of two consecutive time slots, that is, the kth subframe includes time slot 2k and time slot 2k+1. The TDD system supports 7 different uplink and downlink configurations, as shown in Table 1...
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Login to View More IPC IPC(8): H04L1/16H04L1/18H04L5/00
Inventor 付景兴孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT