With reference to 5G networks, What is HARQ FTI and PRI in successRAR (msgB) and PUCCH Resource Indicator(4-bits)?
HARQ Feedback Timing Indicator(3bits):
In 5G, HARQ (Hybrid Automatic Repeat Request) Feedback Timing Indicator (FTI) is a signaling parameter that is used to provide feedback to a user equipment (UE) about the timing of the HARQ feedback message from the base station (gNB).
HARQ is a technique used to improve the reliability of data transmissions by retransmitting the data when errors are detected. When a UE transmits a data packet to the gNB, it waits for the HARQ feedback message from the gNB, which indicates whether the packet was received correctly or not. The FTI is used by the UE to determine the timing of the HARQ feedback message.
The HARQ FTI is a value that is included in the scheduling grant message sent by the gNB to the UE, and it indicates the timing of the HARQ feedback message. The UE uses the FTI to determine when to expect the feedback message and to adjust its timing accordingly.
The FTI value can be set to different values depending on the specific 5G communication scenario and the requirements of the application. The UE may be required to transmit a new packet if it does not receive the HARQ feedback message within the specified timing window.
Overall, the HARQ FTI is an important parameter in 5G that helps to ensure a reliable and efficient communication between the UE and the gNB, by providing feedback about the timing of the HARQ feedback message.
PUCCH Resource Indicator(4-bits):
In 5G, PUCCH (Physical Uplink Control Channel) Resource Indicator (PRI) is a signaling parameter that is used to indicate the resources allocated for the transmission of control information over the PUCCH.
The PUCCH is used to transmit control information from a user equipment (UE) to a base station (gNB), such as acknowledgements, scheduling requests, and other signaling messages. The PRI is used by the UE to indicate the resources allocated for the PUCCH transmission.
The PRI value is included in the scheduling grant message sent by the gNB to the UE, and it specifies the resources that are allocated for the PUCCH transmission. The resources can be allocated in different ways, such as a specific time-frequency resource, a resource block group, or a sequence of resource block groups.
The PRI value is determined based on the specific 5G communication scenario and the requirements of the application. The UE uses the PRI to configure the PUCCH transmission and to ensure that the control information is transmitted efficiently and reliably to the gNB.
Overall, the PUCCH Resource Indicator is an important parameter in 5G that helps to ensure a reliable and efficient communication between the UE and the gNB, by indicating the resources allocated for the PUCCH transmission.
