Scheduling Request Event Signaling for Accurate RA Trigger Handling
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Solution Overview
Problem
In communications systems, network devices misunderstand the occurrence of first and second events related to scheduling requests (SRs) due to insufficient information, leading to incorrect processing of uplink resources and wasting air interface signaling, particularly when multiple logical channel groups have data to send.
Innovation Solution
The terminal device sends first indication information to the network device to differentiate between SRs triggered by a first event (maximum transmissions reached) or a second event (no available PUCCH resource), using various methods such as RRC messages, MAC CEs, or UCI, to prevent misunderstandings and optimize resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the terminal device sends only BSR information without event type indication, then the signaling overhead is reduced, but the network device cannot accurately determine whether the RA is triggered by the first event or the second event, leading to incorrect processing of uplink resources
Solution Approach 1:
The patent combines the event type indication with the existing BSR reporting mechanism by embedding the event type in the BSR MAC CE structure. Specifically, the network device configures a mapping between LCGs and event types, allowing the BSR report itself to indicate which event triggered the RA procedure, thus merging two functions (data volume reporting and event indication) into a single signaling message
Solution Approach 2:
The patent introduces an intermediary mapping relationship between LCGs and event types that is pre-configured by the network device. This mapping acts as a mediator that allows the terminal device to indicate the event type indirectly through the LCG identifier in the BSR report, without requiring direct explicit event type signaling
2Reliability
If the network device uses incorrect processing manner for uplink resource due to misunderstanding the event type, then system performance is affected, but adding explicit event indication increases air interface signaling waste
Solution Approach 1:
The patent applies preliminary action by having the network device pre-configure the mapping relationship between LCGs and event types before the RA procedure occurs. This pre-configuration enables the terminal device to indicate the event type efficiently during BSR reporting without requiring additional real-time signaling exchanges, thus improving reliability while avoiding signaling waste
3Productivity
If the terminal device triggers RA when multiple LCGs have data to send, then the data transmission can proceed, but the network device cannot determine which LCG's service type triggered the RA, leading to incorrect event determination
Solution Approach 1:
The patent applies local quality by associating different event types with specific LCGs through pre-configured mapping. When multiple LCGs have data, the terminal device can indicate which specific LCG triggered the RA by setting the corresponding BSR buffer status, and the network device uses the LCG-event mapping to determine the event type locally based on the reported LCG identifier
Data Source
AI summary
This application relates to the communications field, and discloses an event processing method and an apparatus, to prevent a network device from misunderstanding occurrence of a first event or a second event. The event processing method includes: determining first indication information, where the first indication information is used to indicate random access RA triggered by a first event or a second event, the first event refers to a quantity of transmissions of a scheduling request (SR) reaching a maximum quantity of transmissions of the SR, and the second event refers to, for an SR that has been triggered and that is in a pending state, there being no available physical uplink control channel (PUCCH) resource; and sending the first indication information.