Uplink power control method and device for user equipment in carrier aggregation scenario

Abstract

The invention provides an uplink power control method and device for user equipment in a carrier aggregation scenario. The method comprises acquiring a first maximum transmitting power of user equipment corresponding to a first sub-frame and a second maximum transmitting power of the user equipment corresponding to a second sub-frame respectively; and when the first maximum transmitting power and the second maximum transmitting power are different, performing power control on the transmitting powers of a plurality of carriers in an overlap region so as to enable the total sum of the transmit powers of the plurality of carriers after the power control in the overlap region to be less than or equal to the first maximum transmitting power or the second maximum transmitting power, wherein the first sub-frame and the second sub-frame are adjacent sub-frames, and the overlap region is a part where the first sub-frame and the second sub-frame are overlapped due to the difference in timing advance values of the plurality of carriers.

Description

technical field [0001] The present invention relates to communication technologies, and in particular to a method and device for controlling uplink power of user equipment in a carrier aggregation scenario. Background technique [0002] In LTE-A (further evolution of Long Term Evolution) R10 (Release 10), the timing of multiple carriers refers to the timing advance (Timing Advance; TA) value of the primary cell (PCell), that is, multiple carriers correspond to a TA value. In LTE-A R11 (Release 11), different carriers are allowed to have different TA values. Carriers can be divided into different timing advance groups (Timing Advance Group; TAG for short) according to different TA values, that is, the TA values ​​in one TAG are the same, but the TA values ​​in different TAGs are different. [0003] Since the TA values ​​between different TAGs are not the same, for different carriers (that is, each carrier is in a different TAG), some adjacent subframes may overlap with each...

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Problems solved by technology

[0003] Since the TA values ​​between different TAGs are not the same, for different carriers (that is, each carrier is in a different TAG), some adjacent subframes may overlap with each other, and the overlapping time is at most 30us, and the total transmit power of the user equipment (User Equipment; UE for short) may exceed the maximum transmit power of the UE during the short overlapping period, resulting in limited power or reaching the interference level, resulting in limited interference

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