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HARQ transmission method capable of supporting PUSCH

A technology of retransmission indication and hybrid automatic retransmission, applied in the direction of error prevention/detection, electrical components, wireless communication, etc. using the return channel, which can solve the problem of no solution and achieve the effect of ensuring normal operation

Inactive Publication Date: 2013-09-11
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Therefore, in the follow-up research of LTE-A in Rel-11, one topic is to study how to support synchronous HARQ transmission in the case of different TDD uplink and downlink configurations of multiple cells in CA. There is no solution in this regard yet.

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  • HARQ transmission method capable of supporting PUSCH
  • HARQ transmission method capable of supporting PUSCH
  • HARQ transmission method capable of supporting PUSCH

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Embodiment Construction

[0064] In order to make the purpose, technical means and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0065] First of all, let me explain that for CA terminals, the cell that receives UL Grant from PDCCH or the cell that receives HARQ-ACK from PHICH and the cell that sends PUSCH data may be two different cells. This scheduling method is called cross-carrier scheduling. Or the HARQ-ACK cell is called the calling cell, and the cell sending the PUSCH data is called the called cell.

[0066] As described in the background, the CA terminal adopts the same TDD uplink and downlink configuration on multiple cells, so the HARQ transmission timing of the PUSCH on each cell is also the same. However, with the further development of research, it has been suggested that different TDD uplink and downlink configurations may be used on multiple cells of carrier aggregation. In this...

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Abstract

The invention provides an HARQ transmission method capable of supporting a PUSCH. When HARQ transmission of the PUSCH is carried out, as for a CA terminal which adopts different TDD uplinks and downlinks on a plurality of cells, data are sent to the PUSCH of modulated cells according to modulation timing of modulating cells; under configuration and combination of the TDD uplinks and downlinks of certain modulating cells and modulated cells, the terminal does not transmit PUSCH data according to uplink subframes confirmed by an n+7 timing sequence any more, and / or the terminal does not detect HARQ-ACK feedback information on a PHICH channel according to the n+7 timing sequence. Therefore, the method can ensure that a backward compatible terminal on the modulated cells can correctly receive UL Grant and PHICH, and ensures normal operation of the HARQ transmission.

Description

technical field [0001] The present invention relates to a wireless communication system, and more specifically relates to a time division multiplexing (TDD, TimeDivisionDuplexing) system supporting carrier aggregation (CA, CarrierAggregation), when the TDD uplink and downlink configurations of multiple cells (cells) are different, support A physical uplink shared channel (PUSCH, PhysicalUplinkSharedChannel) synchronous hybrid automatic repeat request (HARQ, HybridAutomaticRepeatRequest) transmission method. Background technique [0002] Long Term Evolution (LTE, Long Term Evolution) technology supports frequency division duplexing (FDD, Frequency Division Duplexing) and time division duplexing (TDD, Time Division Duplexing) two duplexing modes. figure 1 It is a schematic diagram of the frame structure of the TDD system of LTE. The length of each wireless frame is 10 milliseconds (ms), and it is divided into two half-frames with a length of 5ms. Each half-frame contains 8 ti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04W72/12
Inventor 付景兴孙程君
Owner BEIJING SAMSUNG TELECOM R&D CENT