Method and device for transmitting signal

Abstract

The invention discloses a method for transmitting a signal. When a time division duplex (TDD) frequency band corresponding to a TDD system is adjacent to a frequency division duplex (FDD) frequency band corresponding to an FDD system, a guard band is arranged between the TDD frequency band and the FDD frequency band; the FDD system transmits the signal by using the guard band in a time slot with the consistent signal transmission direction in the TDD frequency band and the FDD frequency band; and the signal is not received or transmitted in the guard band in a time slot with the inconsistent signal transmission direction in the TDD frequency band and the FDD frequency band. The invention discloses a device for transmitting the signal at the same time. The method and the device can better improve the utilization rate of frequency resources.

Description

technical field [0001] The present invention relates to mobile communication technology, in particular to a signal transmission method and device when frequency bands of a Time Division Duplex (TDD, Time Division Duplex) system and a Frequency Division Duplex (FDD, Frequency Division Duplex) system are adjacent. Background technique [0002] According to the current spectrum resource allocation method, it often happens that the TDD frequency band corresponding to the TDD system is adjacent to the FDD frequency band corresponding to the FDD system. The frequency bands are adjacent to both cases. At this point, it is necessary to take certain measures to solve the possible cross-interference problem between the two. [0003] figure 1 It is a schematic diagram of an existing solution when the TDD frequency band is adjacent to the FDD downlink frequency band. Such as figure 1 As shown, in order to prevent cross-interference between the uplink signal in the TDD frequency band...

AI Technical Summary

Problems solved by technology

[0005] Although the above method can better solve the cross-interference problem that may occur when the TDD frequency band is adjacent to the FDD frequency band, there are certain problems in this method. figure 1 Shown as an example: when the signal sent in the TDD frequency band is a downlink signal, there is no cross-interference between the signal and the downlink signal in the FDD downlink frequency band, that is to say, in this case, even if the guard band is set It doesn't make much sense; but in the existing method, no matter whether the uplink or downlink signal is sent in the TDD frequency band, the guard band will always exist, and any signal transmission and reception is not allowed in the guard band, which causes resources. waste, which reduces frequency resource utilization

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