Non-authoritative resource uplink power control method and system, terminal and base station

Abstract

The present invention discloses a non-authoritative resource uplink power control method and system, a terminal and a base station. The method comprises: receiving indication information sent by a base station; selecting a power control mode according to the indication information sent by the base station; and calculating and regulating the emission power of a terminal UE according to at least one of the following information: the indication information received by the base station, the maximum emission power of the UE, the path loss, the clear channel assessment (CCA) measurement value and the sum of the power accumulation.

Description

technical field [0001] The present invention relates to wireless communication technology, in particular to a method for controlling uplink power of unlicensed resources, a terminal, a base station and a system. Background technique [0002] In the evolution process of Long Term Evolution (LTE, Long Term Evolution) technology, the LTE Rel-13 version started research in September 2014, and one of the important contents is that the LTE system uses unlicensed carriers to work. This technology will enable the LTE system to use existing unlicensed carriers, greatly enhance the potential spectrum resources of the LTE system, and enable the LTE system to obtain lower spectrum costs. [0003] However, LTE faces many problems when using unlicensed carriers for data transmission, some of which are as follows: [0004] The uplink power control in the LTE / LTE-A system is mainly designed to reduce the interference between signals. Generally, it is calculated based on the open-loop and c...

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Problems solved by technology

In the unlicensed spectrum, in addition to the LTE / LTE-A system, there are other systems such as Wireless Fidelity (WiFi, Wireless Fidelity), Radar (Radar) and other systems. For fairness, each system needs to use the method of listening before sending Obtain resources, that is, before sending data, listen to the channel first. When the detected interference is less than the threshold, the channel is considered to be idle, and data can only be sent at this time. If the detected interference is greater than the threshold, the channel is considered to be busy. Therefore, the situation that there is a lot of mutual interference has been basically ruled out during data transmission. If the uplink power control method of the authorized carrier of the LTE / LTE-A system is still adopted, power resources will be wasted and the unlicensed carrier The uplink performance of the unlicensed spectrum is limited, and the power control of the unlicensed spectrum should not only consider the communication performance, but also consider the clear channel assessment (CCA, Clear Channel Assessment) threshold that can be detected by the adjacent stations, otherwise the adjacent stations may think that the channel is idle, or Occupying this channel will cause interference, so the power control of the unlicensed spectrum is not as small as possible, and factors such as the CCA threshold need to be considered. There is no specific solution for the uplink power control method of the unlicensed carrier

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