5G • RAN
sr-ProhibitTimer
Scheduling Request Prohibit Timer
Timer preventing the UE from repeatedly transmitting Scheduling Requests and flooding the control channel.
Technical Explanation
When the UE transmits an SR on PUCCH, it starts the sr-ProhibitTimer. While the timer is running, the UE is prohibited from transmitting another SR on subsequent PUCCH occasions. This prevents control channel congestion while allowing the gNodeB scheduler time to process the request and allocate an uplink grant.
Key Functions
- Prevents rapid repetitive SR transmissions on PUCCH
- Throttles uplink control channel signaling load
- Configured per SR configuration in RRC SchedulingRequestConfig IE
Specifications
3GPP TS 38.321, TS 38.331
Interfaces
Uu
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