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Indication method and device of transmission mode

A technology of transmission mode and indication, applied in the field of communication, can solve the problem of not supporting MIMO multi-user transmission, etc.

Active Publication Date: 2010-05-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention is proposed for the problem that the demodulation pilot-based MIMO multi-user transmission is not supported in LTE version 10. Therefore, the main purpose of the present invention is to provide a method and device for indicating a transmission mode to solve the above-mentioned problems. question

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Assumptions in Example 1:

[0041] a. For MU-MIMO (multi-user MIMO), the number of multiplexing layers is up to 4, and the number of multiplexing layers for each UE is up to 2;

[0042] b. DMRS has three modes, mode 1: the maximum number of layers is 1 and 2, mode 2: the maximum number of layers is 3 and 4, mode 3: the maximum number of layers is 5 to 8

[0043] c. Only notify UE DMRS Pattern, different DMRS Pattern has different signaling

Embodiment 11

[0045] DCI Format can represent one or two transport block (TB) signaling (unified signaling)

[0046] The DCI Format X of embodiment 1.1 uses the same set of signaling to support the transmission of one and two transmission (TB) blocks at the same time:

[0047] SU-MIMO has 8 states

[0048] Status: 1 to 8 layers; (number of layers)

[0049] MU-MIMO has 6 states

[0050] Rank1:

[0051] DMRS mode 1: layer 1, layer 2 (layer index)

[0052] DMRS mode 2: layer 1, layer 2, layer 3, layer 4

[0053] Rank2: (2 states)

[0054] DMRS mode 2: Layer 1 and Layer 2, Layer 3 and Layer 4

[0055] Total number of states=8+6+2=16, signaling overhead is K=4 bits

[0056] Signaling

SU / MU-MIMO

Rank value

Layer index

DMRS mode

0

S

1

1

1

1

S

2

1，2

1

2

S

3

1，2，3

2

3

S

4

1 to 4

2

4

S

5

1 to 5

3

5

S

6

1 to 6

3

6

S

7

1 to 7

3

[0057] Signaling

SU / MU-MIMO

Rank value

Layer index

DMRS mode

7

S

8

1 to 8

3

8

M

1

1

1

9

M

1

2

1

10

M

1

1

2...

Embodiment 12

[0070] There is only signaling that represents one transmission (TB) block in the DCI Format

[0071] The DCI Format X of Embodiment 1.2 corresponds to one transmission (TB) block, and DCI Format X represents single-layer transmission, or one transmission (TB) block corresponds to two-layer transmission

[0072] SU-MIMO has 8 states

[0073] Status: 1 to 8 layers; (number of layers)

[0074] MU-MIMO has 6 states

[0075] Rank1:

[0076] DMRS mode 1: layer 1, layer 2 (layer index)

[0077] DMRS mode 2: layer 1, layer 2, layer 3, layer 4

[0078] Rank2: (2 states)

[0079] DMRS mode 2: Layer 1 and Layer 2, Layer 3 and Layer 4

[0080] Total number of states=2+6+2=10, signaling overhead is K=4 bits

[0081]

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Abstract

The invention discloses indication method and device of a transmission mode. The method comprises the following step of adding indication information in a downlink control information format, wherein the indication information is used for indicating the transmission mode of user equipment and information corresponding to the transmission mode. The invention solves the problem of nonsupport of MIMO multi-user transmission based on demodulation pilot frequency in LTE of version 10 and realizes support of MIMO multi-user transmission based on the demodulation pilot frequency.

Description

Technical field [0001] The present invention relates to the field of communications, and in particular to a method and device for indicating a transmission mode. Background technique [0002] In wireless communication, if multiple antennas are used at the transmitting end (eNB), we can use spatial multiplexing to increase the transmission rate, that is, transmitting different data at different antenna positions on the same time-frequency resource at the transmitting end. The receiving end (UE) also uses multiple antennas. We can allocate the resources of all antennas to the same user in the case of a single user. This transmission form is called SU-MIMO (single user MIMO). In addition, we can also use multiple antennas. In this case, the resources of different antenna spaces are allocated to different users. This transmission form is called MU-MIMO (multi-user MIMO). If the transmission system needs to support single-user MIMO and multi-user MIMO at the same time, it is necessar...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L1/06H04B7/04
CPCH04B7/0413
Inventor 李儒岳戴博郁光辉
Owner ZTE CORP
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