Method for reducing out-of-band radiation of user equipment and user equipment

Abstract

The invention discloses a method for reducing out-of-band radiation of user equipment (UE) and the user equipment (UE). The method comprises the following steps of: deflecting a cell sounding reference symbol (SRS) frequency band and / or a cell preamble format 4 physical random access channel (PF4PRACH) frequency band in a configuration frequency band range of the channel to ensure that the cell SRS frequency band and / or the cell PF4PRACH frequency band are kept away from a configuration frequency band of an adjacent frequency band channel; emitting the SRS by the UE according to the cell SRS frequency band after deflection; and / or, emitting the PF4PRACH according to the cell PF4PRACH frequency band after the deflection. The technical scheme of the invention can reduce out-of-band radiation caused by the SRS emission and / or the PF4PRACH emission performed by the UE.

Description

technical field [0001] The present invention relates to the technical field of Long Term Evolution (LTE, Long Term Evolution) systems, and particularly relates to a method and device for reducing out-of-band radiation of user equipment (UE). Background technique [0002] figure 1 It is a schematic diagram of coexistence scenarios of uplink and downlink adjacent channels in the existing LTE working frequency band. According to the definition of the current LTE working frequency band, there are such figure 1 In the deployment scenario shown, an uplink (UL) channel of a working frequency band and a downlink (DL) channel of an adjacent frequency band coexist. In the above scenario, the cutoff frequency ( figure 1 Indicated by a grid pattern) is greater than the guard bandwidth between frequency bands (GB, figure 1 Indicated by a diagonal stripe pattern). In order not to reduce spectrum allocation and allow channels operating at the edge of the frequency band to use high cha...

AI Technical Summary

Problems solved by technology

Since the power control of SRS is based on the power control of PUSCH, the transmission power of SRS may be relatively high, which will generate high out-of-band radiation and interfere with adjacent channels;

[0020] 2. In UpPTS, SRS may be close to adjacent frequency band channels

Since the power control of SRS is based on the power control of PUSCH, the transmission power of SRS may be relatively high, which will generate high out-of-band radiation and interfere with adjacent channels;

[0021] 3. In UpPTS, PF4PRACH may be close to adjacent frequency band channels

[0022] To sum up, in the existing LTE system, the out-of-band radiation of UE needs to be further reduced

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