Primary Base Station Reconfiguration for Secondary Node Access
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Solution Overview
Problem
In existing communication systems, a user equipment cannot be reconfigured in a secondary base station when the secondary base station does not provide a reconfiguration function, leading to failed reconfiguration processes and delayed uplink data transmission due to long delays and collisions in contention-based random access processes.
Innovation Solution
A method where a primary base station receives a request to reconfigure resources for a user equipment at a secondary base station, initiating the reconfiguration by sending necessary information such as preamble sequence numbers, physical random access channel sequence numbers, timing advance information, and uplink grants to the user equipment, allowing it to access the secondary base station without contention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a user equipment initiates a contention-based random access process to the secondary base station when reconfiguration is needed, then the UE can obtain updated TA and uplink grant, but the access delay is long and collision failures occur frequently
Solution Approach 1:
The network side performs preliminary actions by allocating dedicated random access resources (preamble sequences) to the UE before the actual random access process. This allows the UE to skip the contention-based preamble selection phase and directly use the pre-assigned resources for access, thereby reducing access delay and eliminating collision failures.
Solution Approach 2:
The primary base station acts as an intermediary by receiving reconfiguration requests from the secondary base station or UE, coordinating the allocation of dedicated random access resources, and managing the reconfiguration process. This intermediary coordination enables seamless reconfiguration without requiring the UE to undergo lengthy contention-based access procedures.
2Device complexity
If the secondary base station does not provide a reconfiguration function, then the network architecture is simplified, but the reconfiguration process fails and uplink data transmission is delayed
Solution Approach 1:
The primary base station is designed to perform multiple functions including serving as the main control node and acting as a reconfiguration server for the secondary base station. When the secondary base station lacks reconfiguration capability, the primary base station assumes this additional reconfiguration function, ensuring that the system maintains full reconfiguration capability without requiring every base station to have identical functionality.
Solution Approach 2:
The primary base station serves as an intermediary reconfiguration server that receives reconfiguration requests from the secondary base station or UE, generates appropriate reconfiguration messages, and delivers them to the UE. This intermediary approach allows the system to maintain reconfiguration functionality even when the secondary base station cannot perform reconfiguration independently.
Data Source
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AI summary
This application discloses a resource reconfiguration method, a base station, and a user equipment. The method includes: receiving, by a primary base station, a first message, where the first message is used to request to reconfigure, for a user equipment, a resource corresponding to a secondary base station; and initiating, by the primary base station, reconfiguration of the resource corresponding to the secondary base station for the user equipment. By means of this application, the resource corresponding to the secondary base station can be reconfigured for the user equipment in a case in which the secondary base station does not provide a reconfiguration function.