Method for transmitting HARQ-ACK (hybrid automatic retransmission request-acknowledgment) information

A transmission mode and the same technology, applied in the field of HARQ-ACK information transmission, can solve the problems of insufficient power support, limited transmission power, etc., and achieve the effect of improving throughput

Inactive Publication Date: 2013-03-27
BEIJING SAMSUNG TELECOM R&D CENT +1
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Problems solved by technology

However, due to the limited transmission power of the terminal at the edge of the cell, its power is not enoug

Method used

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  • Method for transmitting HARQ-ACK (hybrid automatic retransmission request-acknowledgment) information
  • Method for transmitting HARQ-ACK (hybrid automatic retransmission request-acknowledgment) information
  • Method for transmitting HARQ-ACK (hybrid automatic retransmission request-acknowledgment) information

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[0031] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0032] For a TDD system configured with carrier aggregation, the present invention assumes that the uplink and downlink configurations of multiple Cells of the base station may be different. Similar to LTE-A, the UE accessing the base station can be configured to work in one cell or multiple (part of or all) cells. In the present invention, the situation that the uplink and downlink configurations of the above multiple Cells can be different is consistent with LTE-A, and the HARQ-ACK timing and bundling window of each Cell fed back by the UE in the physical uplink control channel (PUCCH) are still different. It is determined according to the TDD uplink and downlink configuration of each Cell. The method for determining the transmission mode of HAR...

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Abstract

The invention provides a method for transmitting hybrid automatic retransmission request-acknowledgment (HARQ-ACK) information. The method is used for the circumstance that multiple Cells in CA are different in uplink and downlink configuration. The method includes that each Cell, in the CA, determined to be used for transmitting HARQ-ACK information is configured with at least one HARQ-ACK transmission mode of the Cell on a PUCCH (physical uplink control channel), PUCCH resources used for HARQ-ACK information transmission are notified to UE (user equipment) through a transmission power control (TPC) domain in a physical downlink control channel (PDCCH) to enable the UE to determine the PUCCH resources used and the transmission mode based for the HARQ-ACK transmission, and even terminals positioned at edges of the Cells can normally send HARQ-ACK information. Consequently, the circumstance that the multiple carrier-aggregated Cells are different in uplink and downlink configuration is effectively supported.

Description

technical field [0001] The invention relates to wireless communication system technology, in particular to a method for transmitting HARQ-ACK 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 seven different uplink and downlink configurations, as shown in Table 1. In Table 1, D represents a downlink subframe, U repr...

Claims

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Application Information

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IPC IPC(8): H04L1/18
Inventor 付景兴
Owner BEIJING SAMSUNG TELECOM R&D CENT
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