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|1. (WO2018137591) METHOD AND SYSTEM FOR TRANSMITTING REFERENCE SIGNAL, BASE STATION, AND TERMINAL|
|Applicants:||CHINA MOBILE COMMUNICATION LTD., RESEARCH INSTITUTE
CHINA MOBILE COMMUNICATIONS GROUP CO., LTD.
|Title:||METHOD AND SYSTEM FOR TRANSMITTING REFERENCE SIGNAL, BASE STATION, AND TERMINAL|
Embodiments of the present disclosure provide a method and a system for transmitting a reference signal, a base station, and a terminal. The embodiments of the disclosure realize hybrid transmission of a wideband SRS and a sub-band SRS, and improve the flexibility of SRS transmission. In the embodiments of the present disclosure, reference signal overheads can be reduced by increasing a transmission period of the wideband SRS, and bandwidth configuration and transmission of the sub-band SRS are determined by a base station by considering historical CSI information of wideband SRS estimation in conjunction with a CQI reported by a terminal. In this way, an SRS transmission mode can be flexibly configured according to a terminal service status, without the need to transmit a plurality of sub-bands over a plurality of symbols by frequency hopping to cover an entire frequency band, which can improve resource utilization. In addition, the sub-band SRS in the embodiments of the present disclosure can be configured to be transmitted aperiodically, and "SRS reconfiguration indication" information thereof can be indicated by a DCI of a downlink control channel. In comparison with an RRC signaling configuration manner in LTE, the indication manner using a DCI can reduce a delay and is more suitable for high-speed motion scenarios.