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Indication method and indication device of downlink transmission mode

A technology of transmission mode and indicating device, applied in diversity/multi-antenna system, space transmit diversity, electrical components, etc., can solve the problems of unavailable, inconvenient practical application, etc., and achieve the effect of good compatibility

Active Publication Date: 2010-01-20
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the existing technical solutions, the newly defined DCI Format only supports two-layer transmission (single-layer transmission corresponds to the transmission mode of a single antenna port, and two-layer transmission refers to the transmission mode of two antenna ports corresponding to dual-stream Beamforming in R9), Or support two-layer transmission and single-layer transmission at the same time. In addition, it is still unable to provide dual-stream Beamforming technology in single-user multiple antenna input and output (SU-MIMO) and multi-user multiple antenna input and output (MU-MIMO) scenarios. The solution of DCI Format, which brings inconvenience to practical application

Method used

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  • Indication method and indication device of downlink transmission mode
  • Indication method and indication device of downlink transmission mode
  • Indication method and indication device of downlink transmission mode

Examples

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Embodiment 1

[0095] In this embodiment, in the scenario of single-user multiple antenna input and output (SU-MIMO), the newly defined DCI Format 2A / X (indicates DCI Format 2A or DCI Format X, and "DCI Format X" indicates a newly defined one DCI format) can be used to represent two-layer transmission, single-layer transmission and transmission diversity transmission modes.

[0096] DCI Format 2A / X can correspond to two transport blocks, when both transport blocks are enabled (enable) (when the modulation and coding scheme (MCS) signaling of a transport block is 0 and the redundancy version (RV) signaling is 1, indicating that the transport block is not enabled), DCI Format 2A / X indicates two-layer transmission, and when only one transport block is enabled, DCI Format 2A / X indicates single-layer transmission or transmit diversity transmission. Wherein, when DCI Format 2A / X represents single-layer transmission, its corresponding reference signal (pilot) is the reference signal when there is o...

Embodiment 2

[0104] In this embodiment, in a single-user multiple-antenna input-output (SU-MIMO) scenario, the newly defined DCI Format 2A / X can be used to represent two-layer transmission, single-layer transmission, and transmission diversity transmission modes. In the single-layer transmission mode, it also indicates a reference signal index, and a transport block index has a one-to-one correspondence with reference signals (pilots), and different transport blocks correspond to different reference signals (pilots).

[0105] DCI Format 2A / X can correspond to two transmission blocks. When both transmission blocks are enabled, DCIFormat 2A / X represents two-layer transmission; when only one transmission block is enabled, DCI Format 2A / X represents single-layer transmission Or a transmission mode of transmit diversity. Among them, when DCI Format 2A / X represents single-layer transmission, the corresponding reference signal (pilot) can be the user-specific reference signal in R8, that is, the ...

Embodiment 3

[0123] In this embodiment, in the scenarios of single-user multiple antenna input and output (SU-MIMO) and multi-user multiple antenna input and output (MU-MIMO), the newly defined DCI Format 2A / X can be used to represent single-user two-layer transmission , single-user single-layer transmission, multi-user single-layer transmission and transmission diversity transmission modes.

[0124] DCI Format 2A / X can correspond to two transmission blocks. When both transmission blocks are enabled, DCIFormat 2A / X indicates single-user two-layer transmission, and when only one transmission block is enabled, DCI Format2A / X indicates single-user User single-layer transmission, multi-user single-layer transmission or transmission diversity transmission mode. Wherein, when DCI Format 2A / X represents single-layer transmission, its corresponding reference signal (pilot) is the reference signal in R9 corresponding to the enabled transport block.

[0125] When only one transport block is enabled...

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Abstract

The invention provides an indication method of a downlink transmission mode. A base station carries downlink control information in a physical downlink control channel and transmits the downlink control information to a terminal, the downlink transmission mode is indicated only by an indication signaling in the downlink control information, or, and the downlink transmission mode is indicated by the number of enable transmission blocks and the indication signaling. The invention also provides an indication device of the downlink transmission mode.

Description

technical field [0001] The invention relates to the field of mobile wireless communication, in particular to a method and device for indicating a downlink transmission mode in a wireless communication system. Background technique [0002] A radio frame (radio frame) in a Long Term Evolution (LTE, Long Term Evolution) system includes frame structures in a Frequency Division Duplex (FDD, Frequency Division Duplex) mode and a Time Division Duplex (TDD, Time Division Duplex) mode. The frame structure of FDD mode, such as figure 1 As shown, a wireless frame of 10 milliseconds (ms) consists of twenty slots (slots) with a length of 0.5ms and numbers 0 to 19, and slots 2i and 2i+1 form a subframe (subframe) with a length of 1ms i. The frame structure of TDD mode, such as figure 2 As shown, a 10ms radio frame consists of two half frames with a length of 5ms. A half frame includes five subframes with a length of 1ms. Subframe i is defined as two time slots with a length of 0.5ms. ...

Claims

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Application Information

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IPC IPC(8): H04W48/12
CPCH04B7/06
Inventor 戴博吴欣郁光辉李卫军
Owner ZTE CORP
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