Wireless Device RRC Configuration Selection Based on Network State
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Solution Overview
Problem
Current wireless communication networks face inefficiencies due to the large amount of signaling required for Radio Resource Control (RRC) configuration messages between base stations and wireless devices, which consumes valuable radio resources and affects network capacity and performance.
Innovation Solution
Implementing a method where wireless devices obtain a set of RRC configurations from the network and select the appropriate configuration based on network state indications sent by the base station, reducing the need for frequent transmission of lengthy configuration messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations transmit detailed RRC configuration messages to wireless devices, then the devices can operate with proper radio parameters, but the signaling overhead increases and radio resources are consumed
Solution Approach 1:
The RRC configuration is segmented into two parts: (1) a compressed configuration index or identifier transmitted via signaling, and (2) the full configuration details stored in a configuration database (either in the network or device). Instead of transmitting the entire configuration message, only the index is signaled, which references the pre-defined configuration set. This segmentation reduces signaling overhead while maintaining complete configuration information availability.
Solution Approach 2:
RRC configuration templates or profiles are pre-defined and stored in advance in the network or device memory. These pre-configured templates contain complete radio parameters for various scenarios. When a configuration is needed, the system selects and activates a pre-existing template rather than generating and transmitting a new full configuration message, thereby reducing signaling overhead.
2Adaptability or versatility
If base stations frequently update RRC configurations to adapt to changing network conditions, then the network responsiveness improves, but the signaling overhead increases
Solution Approach 1:
The system implements dynamic configuration selection where the base station can indicate different configuration indices based on current network conditions, device state, or service requirements. The wireless device maintains multiple configuration indices in its database and can dynamically switch between them by receiving updated index indications from the base station, enabling rapid adaptation without transmitting full configuration messages.
Solution Approach 2:
Instead of changing entire configuration messages, the system changes only the configuration index parameter. The base station signals a new index value that points to a different pre-defined configuration template, thereby achieving configuration updates with minimal signaling overhead while maintaining adaptability to changing network conditions.
3Loss of energy
If the RRC configuration message size is reduced to save radio resources, then the signaling overhead decreases, but the configuration detail and precision may be lost
Solution Approach 1:
Instead of transmitting the actual full configuration message every time, the system transmits a reference (index) that points to a copy of the complete configuration stored in a pre-established configuration database. The wireless device retrieves the full configuration details from its local copy based on the received index, thereby maintaining information completeness while minimizing signaling overhead.
Data Source
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AI summary
A method and wireless device (700) for applying a Radio Resource Control, RRC, configuration in a radio communication between the wireless device and a serving base station (702a) of a wireless communication network (702). The wireless device (700) obtains a set of RRC configurations (704), each RRC configuration comprising a plurality of radio parameters dictating how the wireless device should operate in the network (702). The wireless device (700) further receives an indication (706) from the serving base station reflecting a network state of the wireless communication network (702), and then selects and applies an RRC configuration out of the set of RRC configurations, based on the received indication. Thereby, capacity and performance can be improved in the network by reduced signalling with the wireless device (700) and more flexible usage of RRC configuration suitable for the network state.