Scheduling request transmission control method and related product
摘要
說明書
In an SR transmission mechanism for User Equipment (UE) in an LTE system specified in an LTE Media Access Control (MAC) protocol (TS 36.321 MAC protocol), when the UE is required to send data to be transmitted (the data to be transmitted may be data cached in a Radio Link Control (RLC) layer and/or a Packet Data Convergence Protocol (PDCP) layer), the UE may judge whether there is a Physical Uplink Control Channel (PUCCH) resource in a present Transmission Time Interval (TTI) or not. If PUCCH resources are configured and an sr-ProhibitTimer does not run (the sr-ProhibitTimer is configured by Radio Resource Control (RRC) signaling mainly to limit frequent SR transmission and occupation of excessive PUCCH resources), a Physical (PHY)-layer entity is instructed to send an SR on the corresponding PUCCH resource. Simply speaking, the SR is triggered and sent because there is cached data to be transmitted in one or a group of logical channels of the UE (for example, cached data in the RLC layer and/or the PDCP layer) and, meanwhile, the UE does not obtain an Uplink Shared Channel (UL-SCH) resource to transmit the corresponding data to be transmitted. For transmitting the SR, the UE is required to obtain an effective PUCCH resource. If the UE may obtain the effective PUCCH resource in a certain TTI, a MAC-layer entity may notify the PHY-layer entity to transmit the SR on the corresponding PUCCH resource. A corresponding parameter for the SR (for example, the PUCCH resource transmitting the SR) is configured through an RRC-layer entity, and a configuration Information Element (IE) of the RRC signaling is as follows:
