A link control method and device

Abstract

The invention provides a link control method and device and belongs to the wireless field. The method comprises the following steps that: first link quality is obtained; a new modulation mode to be used is determined according to the first link quality; current transmitting power is obtained; and if the current transmitting power can make microwave transmission equipment work normally under the new modulation mode, the new modulation mode is determined as a current modulation mode, otherwise, an original modulation mode is kept as the current modulation. With the link control method and device of the invention adopted, nonlinear distortion occurring under a high-order modulation mode, which is caused by discordance of the effects of automatic modulation (AM) and automatic transmit power control (ATPC), can be avoided, and at the same time, it can be ensured that a low-order modulation mode can exert larger transmission power.

Description

technical field

[0001] The invention relates to the field of wireless communication, in particular to a link control method and device. Background technique

[0002] With the development of communication technology, services are evolving from purely small-bandwidth voice services to large-bandwidth digital multimedia services, and the demand for microwave transmission equipment that supports adaptive modulation (Automatic Modulation, AM) is also increasing.

[0003] This kind of microwave transmission equipment needs to support high-order modulation (such as 256QAM, quadrature amplitude modulation) to obtain larger bandwidth when the weather is good (such as when the weather is sunny); Sometimes (such as when it is cloudy and rainy), when the high-order modulation method cannot be maintained, it is necessary to use a low-order modulation method (such as QPSK, quadrature phase shift keying modulation method) to maintain the normal transmission of important services;

[0004] ...

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