5G • Services
Sidelink Mode 1
Network-Scheduled Sidelink Resource Allocation
Sidelink operating mode where the gNodeB dynamically schedules time-frequency resources for vehicle communications.
Technical Explanation
In Mode 1, the vehicle is in cellular coverage. When it needs to transmit a V2X packet, it requests resources from the gNodeB. The gNodeB issues a sidelink grant via DCI Format 3_0 on PDCCH, optimizing radio resource efficiency and preventing packet collisions across nearby vehicles.
Key Functions
- Radio resources allocated and coordinated centrally by the gNodeB scheduler
- Uses DCI Format 3_0 on PDCCH to deliver sidelink transmission grants
- Prevents mutual interference between dense clusters of transmitting vehicles
Specifications
3GPP TS 38.213, TS 38.300
Interfaces
UuPC5
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