RRC Connection Complete Message Suppression in LTE
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Solution Overview
Problem
In LTE networks, the existing RRC connectivity protocols require multiple 'complete' messages for each RRC connection, leading to unnecessary overhead and resource consumption due to lack of optimization between UE and eNB during multiple RRC connection message transmissions.
Innovation Solution
The method involves suppressing one or more RRC connection complete messages by indicating to the UE to omit them based on the expected subsequent RRC connection reconfiguration message, thereby optimizing signaling efficiency and resource conservation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple RRC connection complete messages are transmitted for each RRC connection, then connection reliability is ensured, but signaling overhead increases and resources are consumed
Solution Approach 1:
The patent extracts and removes redundant RRC connection complete messages from the signaling sequence. By identifying that certain complete messages are unnecessary when the network will send a reconfiguration message anyway, the invention eliminates these redundant transmissions, reducing signaling overhead while maintaining connection reliability through the essential messages only.
Solution Approach 2:
The patent applies partial action by selectively suppressing only the redundant complete messages while maintaining transmission of necessary complete messages. This partial suppression approach optimizes signaling efficiency without compromising connection reliability, as the network can still receive sufficient confirmation through the reconfiguration complete message.
2Reliability
If multiple RRC connection complete messages are transmitted, then connection establishment is confirmed, but message transmission time increases
Solution Approach 1:
The patent removes redundant RRC connection complete messages from the signaling sequence, extracting only the essential confirmation messages needed for connection establishment. This reduction in message count directly decreases transmission time while preserving the necessary confirmation functionality through strategically retained complete messages and the reconfiguration complete message.
Solution Approach 2:
The patent implements skipping by allowing the UE to omit transmitting certain complete messages when the network has indicated upcoming reconfiguration. This skipping mechanism rushes through the connection establishment process more efficiently by eliminating unnecessary waiting and transmission delays for redundant messages.
3Reliability
If RRC connection complete messages are transmitted for each protocol, then protocol compliance is maintained, but device complexity increases
Solution Approach 1:
The patent introduces dynamic message suppression based on network conditions and message type. The UE dynamically determines whether to suppress a complete message by checking if it's the last message of its protocol and if a reconfiguration message is expected. This dynamic approach maintains protocol compliance for essential messages while reducing complexity by suppressing redundant ones, adapting behavior to specific signaling contexts.
Solution Approach 2:
The patent implements feedback mechanisms where the network indicates to the UE whether complete messages should be suppressed. The network provides feedback about upcoming reconfiguration messages, allowing the UE to adjust its transmission behavior accordingly. This feedback loop maintains protocol compliance while simplifying device operation by automating the suppression decision based on network guidance.
Data Source
AI summary
In one embodiment, a method in a wireless device for radio resource control (“RRC”) connectivity includes transmitting a RRC connection request message to a network node, wherein the RRC connection request message is part of a first RRC connection protocol. The method may also include receiving a responsive message from the network node, wherein the response message is part of the first RRC connection protocol. The method may further include receiving an indication that the wireless device should suppress a RRC connection complete message that is part of the first RRC connection protocol. The method may further include determining that the RRC connection complete message should not be transmitted to the network node and suppressing the transmittal of the RRC connection complete message to the network node.