Random Access Channel Timing Window for Low-Power MsgB Detection
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in channel detection and transmission, particularly in 2-steps and 4-steps random access processes, leading to increased power consumption and scheduling delays due to improper timing of channel detection and transmission.
Innovation Solution
A method for determining the starting position of a time window for channel detection and transmission, based on a time delay after an RACH or PUSCH occasion, considering factors like time-domain relationships and subcarrier spacing, to optimize timing and reduce power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the terminal device performs channel detection and the network device performs channel transmission without proper timing alignment, then the random access process can proceed, but power consumption increases and scheduling performance deteriorates
Solution Approach 1:
The patent applies preliminary action by determining the starting position of the time window for channel detection and transmission in advance, before the actual random access procedure begins. The starting position is calculated based on the end position of RACH/PUSCH occasions and a configured time delay, allowing both terminal and network devices to be synchronized and ready, thus avoiding power waste from unnecessary continuous monitoring and preventing scheduling delays.
2Reliability
If the terminal device continuously monitors for MsgB channel without a defined starting position, then it may detect the channel, but power consumption increases significantly
Solution Approach 1:
The terminal device performs preliminary calculation to determine the starting position of the MsgB time window before beginning channel monitoring. This starting position is derived from the end position of RACH/PUSCH occasions plus a configured time delay. By knowing exactly when to start monitoring, the terminal can maintain high detection reliability while avoiding continuous monitoring that would waste power.
Solution Approach 2:
The terminal device autonomously determines its own channel detection starting position using pre-configured parameters and its own timing information, without requiring continuous network guidance or broadcasting. This self-service approach allows the terminal to independently optimize its power consumption while maintaining reliable detection.
3Productivity
If the network device transmits MsgB channel without a defined starting position, then transmission can occur, but scheduling performance deteriorates
Solution Approach 1:
The network device performs preliminary determination of the MsgB transmission starting position before the actual transmission. This starting position is calculated based on the end position of RACH/PUSCH occasions and a configured time delay, allowing the network device to schedule transmissions efficiently and avoid delays caused by ad-hoc timing decisions.
Data Source
AI summary
A channel transmission method is provided. The channel transmission method comprises: a terminal device determines the initial position of a channel detection time window on the basis of a message sent by a network device, the initial position being positioned after a time delay after RACH timing or PUSCH timing finishes; the time delay is at least two symbols or the time delay is related to a time domain relationship of the RACH timing and PUSCH timing. Another channel transmission method, an electronic device, and a storage medium are also provided.