The invention discloses a message sending method, including: the first device sends the first message to the second device on the first bandwidth, the first device receives the second message sent by the second device in response to the first message on the first bandwidth, and the first device sends the third message, the first message, the second message and the first message on the second bandwidth. All three messages carry the device-reserved time-frequency resource information. Within the device-reserved time-frequency resource information, the first device sends messages to the second device over the first bandwidth; or, the first device receives messages sent by the second device over the first bandwidth, where the second bandwidth is greater than or equal to 20M when the first bandwidth is less than 20M. Or, when the first bandwidth is greater than or equal to 20M, the second bandwidth is less than 20M. The embodiment of the invention also provides a related device and system. The embodiment of the invention can maintain the stability of narrow-band equipment in LR transmission and the stability of broadband equipment in broadband transmission.
【技术实现步骤摘要】
【国外来华专利技术】PCT国内申请,说明书已公开。
【技术保护点】
PCT国内申请,权利要求书已公开。
【技术特征摘要】
【国外来华专利技术】PCT国内申请,...
【专利技术属性】
技术研发人员:庞高昆,方平,丁志明,
申请(专利权)人:华为技术有限公司,
类型:发明
国别省市:广东,44
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