RRC Restoration MIMO Configuration Continuity
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Solution Overview
Problem
Current wireless communication systems, particularly in LTE and 5G deployments, face challenges in maintaining maximum MIMO layer configurations during radio resource control (RRC) re-establishment or resume procedures, leading to performance downgrades due to the lack of support for indicating 4-layer MIMO in RRC Connection Re-establishment messages, which forces devices to downgrade from higher-order MIMO configurations.
Innovation Solution
The solution involves ensuring physical layer parameters continuity by allowing network nodes to maintain and signal the maximum MIMO layer configuration, utilizing UE capabilities and context to determine the appropriate configuration, and generating RRC messages that facilitate continued configuration of physical layer parameters, ensuring consistent transmission mode schemes without additional latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If RRC Connection Re-establishment messages do not support indicating 4-layer MIMO configuration, then the message structure remains simple and standardized, but device performance downgrades occur due to forced MIMO configuration reduction
Solution Approach 1:
The patent applies preliminary action by having the network node determine and store the maximum MIMO layer configuration before the RRC re-establishment procedure occurs. When the re-establishment message is generated, this pre-determined configuration is automatically applied, ensuring that the device can resume with the correct MIMO settings without requiring complex signaling during the re-establishment process itself.
2Reliability
If maximum MIMO layer configuration is maintained during RRC re-establishment, then device performance is preserved, but additional signaling and processing requirements increase
Solution Approach 1:
The patent applies self-service by enabling the network node to automatically determine the maximum MIMO layer configuration based on stored UE context and capability information, without requiring additional explicit signaling from the device. The network node serves itself by retrieving and applying the appropriate configuration internally, thereby maintaining MIMO continuity while avoiding increased signaling overhead.
3Loss of time
If RRC re-establishment procedure restores connection quickly, then latency is reduced, but physical layer configuration continuity may be lost
Solution Approach 1:
The patent resolves this contradiction by performing preliminary determination of the maximum MIMO layer configuration before the re-establishment message is sent. This allows the configuration to be automatically restored without requiring additional exchange steps, thus maintaining both low latency and configuration stability.
Solution Approach 2:
The patent ensures continuity of useful action by maintaining the MIMO configuration context in the network node during the RRC re-establishment process. This allows the configuration to flow continuously from the stored context through the re-establishment procedure to the device, preventing any interruption or loss of the physical layer settings while keeping the procedure efficient.
Data Source
AI summary
Systems, methods, apparatuses, and computer program products for physical layer configuration continuity during radio resource control (RRC) restoration. One method includes receiving, by a network node, a request for radio resource control (RRC) re-establishment or resume from a user equipment. The request comprises an indication of parameter continuity that was a part of the user equipment's configuration. The method may further include, when it is determined to accept the request for radio resource control (RRC) re-establishment or resume, generating a radio resource control (RRC) message for facilitating continued configuration of lower layer parameters for the user equipment.