UE Performance Indication in Random Access Channel
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently scheduling uplink traffic, particularly for extended reality (XR) services, due to lack of information on delay status and energy status of user equipment (UE) during random access procedures.
Innovation Solution
The method involves a user equipment (UE) transmitting a communication of a random access channel (RACH) procedure using a specific RACH occasion or preamble to indicate its performance indicators, such as delay status or energy status, allowing the network node to determine uplink scheduling parameters accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the network node schedules uplink traffic without delay status information, then the scheduling is simpler, but the latency for delay-sensitive applications increases
Solution Approach 1:
The UE transmits delay status information during the random access procedure, which occurs before the uplink scheduling decision is made. This preliminary transmission of information allows the network node to have delay status data available when making scheduling decisions, thereby reducing latency for delay-sensitive applications without complicating the scheduling process
2Use of energy by moving object
If the network node schedules uplink traffic without energy status information, then the scheduling is simpler, but the energy consumption for UEs with limited power sources increases
Solution Approach 1:
The UE transmits energy status information during the random access procedure before uplink scheduling decisions are made. This allows the network node to allocate resources efficiently based on the UE's energy status, reducing energy consumption for UEs with limited power sources while maintaining simple scheduling operations
3Productivity
If the UE transmits performance indicators during RACH procedure, then the uplink scheduling efficiency is improved, but the RACH procedure complexity increases
Solution Approach 1:
The performance indicator transmission is merged with the existing random access procedure. The UE includes delay status and energy status information in the RACH message without requiring a separate signaling exchange, thereby improving uplink scheduling efficiency while avoiding additional procedural complexity
Solution Approach 2:
The RACH procedure is enhanced to serve multiple functions: it maintains its original role in establishing uplink synchronization while simultaneously conveying performance indicator information. This multi-functionality improves scheduling efficiency without requiring a separate dedicated signaling procedure
Data Source
AI summary
Various aspects of the present disclosure generally relate to wireless communication. In some aspects, a user equipment (UE) may transmit a communication of a random access channel (RACH) procedure using a RACH occasion, of a plurality of RACH occasions, or a RACH preamble, of a plurality of RACH preambles, to indicate a value for a performance indicator associated with the UE, or using a physical uplink shared channel (PUSCH) occasion and indicating the value for the performance indicator in the communication. The UE may receive, in response to the communication of the RACH procedure, an additional communication of the RACH procedure. Numerous other aspects are described.