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Joint transmission method and device

A joint transmission and transmission request technology, which is applied to the separation device of the transmission path, the adjustment of the transmission mode, and the transmission system, etc., can solve the problem of poor signal quality received by the STA, and achieve the effect of improving the utilization efficiency of spectrum resources and improving the overall throughput rate

Pending Publication Date: 2020-01-03
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the distance or poor signal-to-noise ratio, even if a large proportion of transmit power is allocated to a STA with a poor signal-to-noise ratio for data transmission, the received signal quality of the STA may still be poor.

Method used

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Examples

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Embodiment 2

[0329] In this embodiment of the present application, the second AP is any AP that can assist the first AP to send data to the first STA. Based on the description of Embodiment 1 above, it can be seen that in Embodiment 1, the first AP has determined the identity of the second AP providing transmission assistance, and can directly exchange SOMA signaling information with the second AP, so as to obtain Consistent leading fields. However, in an actual application scenario, when the first AP determines that assistance is needed to send data to the first STA, it may not directly send the first indication information, but may negotiate with the second AP to determine a joint transmission mode, and then send the second indication information. An instruction message to exchange SOMA signaling information between the two parties.

[0330] Therefore, the embodiment of the present application provides another joint transmission method on the basis of the first embodiment. Please refer...

Embodiment 3

[0354] In Embodiment 1 and Embodiment 2 described above, at least one AP among the first AP and the second AP adopts SOMA modulation to send data to two STAs in parallel. Taking the first AP sending data to the first STA and the second STA in parallel as an example, in an actual application scenario, the data lengths of the first data information of the first STA and the second data information of the second STA may not be equal. In this way, when SOMA modulation is performed on the first data information and the second data information, padding needs to be used to match the inconsistency of the data lengths of the two.

[0355] Figure 18 It exemplarily shows the padding in the first PPDU provided by Embodiment 1 and Embodiment 2, as shown in Figure 18 As shown, if the data length of the first data information is greater than the data length of the second data information, the insufficient part of the second data information needs to be filled. The length of this part of f...

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Abstract

The invention discloses a joint transmission method and device. The joint transmission method comprises the steps that a first AP transmits a first PPDU to a first STA and a second STA, and the secondAP transmits a second PPDU to the first STA. In the embodiment of the invention, both the first PPDU and the second PPDU carry first data information sent to the first STA, and the preamble fields and the sending time of the first PPDU and the second PPDU are the same, so that the first AP and the second AP can send the first data information to the first STA at the same sending time by using thesame preamble field, and the signal sending power of the first data information can be increased, and interference possibly generated during multi-AP joint data transmission is avoided, and the signal receiving quality of the first STA is improved. Moreover, the first PPDU is obtained by performing SOMA modulation on the first data information and the second data information by the first AP, so that the spectrum resource utilization efficiency can be effectively improved, and the overall throughput rate of the network is improved.

Description

technical field [0001] The present application relates to the technical field of wireless communication, and in particular to a joint transmission method and device. Background technique [0002] In the current semi-orthogonal multiple access (SOMA) technology, when an access point (access point, AP) sends data to multiple stations (station, STA), it will use the bits of different STAs After the data is allocated to bit positions with different robustness for orderly and reversible fusion, constellation points are mapped, modulated into high-order symbols, and the subsequent transmission process is performed. At the receiving end, each STA receives the same modulation symbol at the same time and frequency spectrum, and extracts the bit data sent to itself according to its own demodulation signaling. From the perspective of the power domain, the SOMA technology can be regarded as a combination of two sets of high-order modulations at a specific power ratio. When the STA sen...

Claims

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Application Information

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IPC IPC(8): H04B7/024H04L1/00
CPCH04B7/024H04L1/0027H04L1/0006H04L1/0003H04L1/0009H04L1/0061H04L1/0008H04L1/00H04W76/15H04L5/001H04L5/0007H04L5/0091H04L27/34H04L5/0048H04L5/0037H04L1/0004H04L1/001H04W76/11H04L27/0008
Inventor 贾嘉黄国刚徐正勋于健
Owner HUAWEI TECH CO LTD
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