name: GNSS
full_form: Global Navigation Satellite System
context: The UE modulated carrier frequency for V2X sidelink transmissions shall be accurate to within Â±0.1 PPM observed over a period of one time slot (0.5 ms) compared to the absolute frequency in case of using GNSS synchronization source. The same requirements applied over a period of one time slot (0.5 ms) compared to the relative frequency in case of using the E-UTRA Node B or V2X UE sidelink synchronization signals. When UE is configured for simultaneous E-UTRA V2X sidelink and E-UTRA uplink transmissions for inter-band E-UTRA V2X / E-UTRA bands specified in Table 5.5G-2, the requirements in subclause 6.5.1G apply for V2X sidelink transmission and the requirements in subclause 6.5.1 apply for the E-UTRA uplink transmission. For V2X UE supporting Transmit Diversity, if the UE transmits on two antenna connectors at the same time, the UE modulated carrier frequency at each transmit antenna connector shall be accurate to within Â±0.1 PPM observed over a period of one time slot (0.5 ms) in case of using GNSS synchronization source. The same requirements applied over a period of one time slot (0.5 ms) compared to the relative frequency in case of using the E-UTRA Node B or V2X UE sidelink synchronization signals. If the UE transmits on one antenna connector at a time, the requirements for single carrier shall apply to the active antenna connector.
description: The Global Navigation Satellite System (GNSS) is a network of satellites orbiting the Earth that provide location information and timing signals to GNSS receivers on the ground. In the context of 3GPP specifications, particularly in Evolved Universal Terrestrial Radio Access (E-UTRA), GNSS is used as a synchronization source for user equipment (UE) transmissions, ensuring accurate frequency control within specified limits.
explanation: GNSS is classified under Technology because it refers to a system of satellites and receivers that provide navigation data and timing signals. In the provided context from 3GPP TS 36.101, GNSS is specifically mentioned as a synchronization source for UE transmissions in V2X sidelink communications, highlighting its role in enabling precise frequency control.
section_title: 6.5.1G Frequency error for V2X Communication
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