LTE Trunking Service Recovery via Cell Reestablishment
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Solution Overview
Problem
In LTE-based trunking communication systems supporting concurrent LTE and trunking services, abnormal radio link situations lead to service disruptions, particularly affecting the recovery of trunking listening user services.
Innovation Solution
A method and system where a user terminal monitors and configures resource information from both the serving and neighbor cells, establishes RRC links, and initiates a reestablishment process by selecting a target cell to recover LTE and trunking services when abnormalities occur, using resource configuration information to restore services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the LTE service and trunking service are concurrently executed in an LTE-based trunking communication system, then the system can meet diverse application demands (government, public security, emergency communications, etc.), but radio link abnormalities and synchronization issues occur more frequently during service execution
Solution Approach 1:
The patent segments the trunking service into two distinct modes: trunking speaking user service (with RRC link) and trunking listening user service (without RRC link). This segmentation allows the system to handle different service requirements separately, reducing interference between services and improving overall reliability during concurrent execution
Solution Approach 2:
The patent establishes resource configuration information for both serving cell and neighbor cell before abnormalities occur. The user terminal pre-configures resource information for potential handover and reestablishment, so when radio link abnormalities occur, the system can immediately switch to pre-prepared configurations, reducing service interruption time
2Reliability
If a target cell is re-selected from serving cell and neighbor cell to initiate RRC reestablishment process, then the LTE service can be recovered, but the trunking listening user service cannot be recovered subsequently
Solution Approach 1:
The patent applies preliminary action by pre-configuring resource information for both serving cell and neighbor cell before abnormalities occur. The user terminal stores resource configuration information including system information blocks, paging configurations, and random access parameters for potential reestablishment. When reestablishment is needed, the terminal can immediately use pre-stored neighbor cell resource information without needing to re-acquire it, enabling complete service recovery including trunking listening user service
Solution Approach 2:
The patent implements feedback mechanisms where the user terminal continuously monitors radio link quality and service status. When abnormalities are detected, the terminal provides feedback information about the abnormality type and current service state to the network side, enabling the network to provide appropriate recovery instructions and resource allocations, ensuring complete service restoration
3Device complexity
If the user terminal configures resource information for serving cell only, then the configuration complexity is reduced, but the service recovery time increases when neighbor cell reselection is needed
Solution Approach 1:
The patent applies preliminary action by having the user terminal pre-acquire and store resource configuration information for both serving cell and neighbor cells during normal operation. The terminal monitors neighbor cell signals and pre-configures resource information including system information blocks, paging configurations, and random access parameters. This preliminary preparation ensures that when handover or reestablishment is needed, the terminal can immediately switch to pre-configured neighbor cell resources, significantly reducing service recovery time
Solution Approach 2:
The patent makes the resource configuration information universal by designing it to be applicable for multiple purposes: normal service operation, handover preparation, and reestablishment recovery. The same resource information structure serves both serving cell and neighbor cell configurations, allowing the terminal to use identical configuration formats and procedures regardless of which cell is currently active, thereby reducing complexity while enabling fast recovery
Data Source
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AI summary
The present invention discloses a method for reestablishing and recovering a LTE-based trunking communication system, including: monitoring first resource configuration information of a serving cell where the user terminal is located and second resource configuration information of a neighbor cell which are issued by a network side, configuring the user terminal according to the first resource configuration information to allow access of the user terminal serving as a trunking listening user, and storing the second resource configuration information; the user terminal establishing an RRC link and a service bearer with the network side; and, when detecting the abnormality of a radio link, the user terminal determining a target cell in the service cell where the user terminal is located and the neighbor cell, and sending a reestablishment request to the target cell, such that when receiving the reestablishment request, the target cell initiates a reestablishment process to recover a common service or both a common service and a trunking speaking user service, and recover a trunking listening user service according to the second resource configuration information. The present invention also discloses a user terminal. The recovery of a trunking listening user service is implemented when an abnormality occurs in a trunking communication system.