UE Cooperative Group Establishment via Pre-configured PRACH Time Windows
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Solution Overview
Problem
The challenge in establishing user equipment cooperative groups in 5G wireless communication systems is the delay caused by waiting for an available physical random access channel (PRACH), which hampers the efficiency of forming cooperative relationships among user equipment.
Innovation Solution
A communication method where a network device and user equipment (UE) establish a cooperative group by exchanging information within a preset time window, with the UE sending a preamble sequence if an available PRACH is obtained, thereby reducing delays and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the UE waits for an available PRACH to send the preamble sequence, then the channel availability is ensured, but the establishment delay increases
Solution Approach 1:
The network device pre-configures time window information (including start time, end time, and length) for sending preamble sequences before the actual random access procedure. This allows the UE to proactively send the preamble sequence within the pre-defined time window without waiting for dynamic PRACH availability, thereby reducing establishment delay while ensuring channel availability through network control
Solution Approach 2:
The system dynamically adjusts the time window configuration for preamble sequence transmission. The network device can configure different time window parameters (start time, end time, length) based on current system conditions, allowing flexible adaptation between ensuring channel availability and reducing delay depending on network load and requirements
2Productivity
If the UE sends the preamble sequence immediately when PRACH is available, then the establishment speed increases, but the delay caused by waiting for PRACH availability increases
Solution Approach 1:
The network device pre-configures time window information (including start time, end time, and length) for sending preamble sequences before the actual random access procedure. This allows the UE to proactively send the preamble sequence within the pre-defined time window without waiting for dynamic PRACH availability, thereby reducing establishment delay while ensuring channel availability through network control
Solution Approach 2:
The system changes the timing parameters of preamble sequence transmission by using pre-configured time windows instead of waiting for dynamic PRACH opportunities. The network device configures specific time window parameters (start time, end time, length) that optimize the balance between establishment speed and waiting delay based on system conditions
Data Source
AI summary
Embodiments of this application disclose a communication method, a related device, and a system. The method includes: receiving, by a network device, a first preamble sequence that is sent by a first terminal in a time window; sending, by the network device, a response message to the first terminal based on the first preamble sequence; receiving, by the network device, a first message sent by the first terminal, where the first message includes information used to identify the first terminal; and sending, by the network device, a second message to a second terminal and the first terminal, where the second message is used to indicate that the first terminal and the second terminal belong to a same user equipment cooperative group. According to this application, efficiency of establishing a user equipment cooperative group can be improved.