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Downlink data transmission method and device

A technology of downlink data and transmission method, applied in the direction of network traffic/resource management, electrical components, wireless communication, etc., can solve the problem of large control signaling overhead, and achieve the effect of reducing control signaling overhead

Active Publication Date: 2018-07-03
CHINA TELECOM CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing technology uses dynamic signaling to inform users of the above information, which requires frequent addition of new downlink control signaling, resulting in a very large control signaling overhead

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  • Downlink data transmission method and device
  • Downlink data transmission method and device
  • Downlink data transmission method and device

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Embodiment Construction

[0033] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangements of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0034] At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0035] The following description of at least one exemplary embodiment is merely illustrative in nature and in no way taken as limiting the invention, its application or uses.

[0036] Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authoriz...

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Abstract

The invention discloses a downlink data transmission method and a downlink data transmission device, which relate to the field of wireless communication. The downlink data transmission method comprises the steps of: receiving a downlink control signal of a base station, and acquiring a reference modulation mode for a user; detecting an actual modulation mode of the base station for a transmitted signal of the user; determining, according to the reference modulation mode and the actual modulation mode, whether the user is scheduled to adopt a NOMA transmission mode or an OMA transmission mode;and processing a signal received by the user according to the determination result. The downlink data transmission method and the downlink data transmission device disclosed by the invention realize the dynamic self-adaptive switching of NOMA and OMA, do not need to add a new downlink control signal, and reduce the control signaling overhead.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a downlink data transmission method and device. Background technique [0002] In the 5G era, user transmission rate requirements continue to increase, prompting the industry to explore new wireless technologies to further improve spectrum efficiency. Among them, NOMA (Non-Orthogonal Multiple Access, non-orthogonal multiple access) technology can theoretically reach the capacity limit of the uplink and downlink channels, so it has been highly valued by the industry at home and abroad; moreover, the processing capabilities of terminals and base stations are increasing day by day It also promotes the wide application of NOMA in 5G. [0003] NOMA technology obtains quasi-orthogonality of multi-user data by deleting interference signals at the receiving end. Therefore, to obtain the gain of NOMA, the user must first know whether there is interference from the co-schedul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/04H04W72/12
CPCH04W72/23
Inventor 杨姗梁林朱剑驰陈鹏毕奇杨峰义
Owner CHINA TELECOM CORP LTD