UE Capability Repository for Wireless Network Overhead Reduction
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Solution Overview
Problem
The increasing length and complexity of UE capability information messages in wireless networks lead to overhead and negatively impact quality of service, as these messages are transmitted frequently, especially with the evolution of wireless devices supporting multiple features and capabilities.
Innovation Solution
A UE capability repository is maintained within the wireless network to store identifying characteristics of devices with their corresponding capabilities, allowing for the retrieval and reuse of existing capability information instead of sending new messages, thereby reducing the need for frequent UE capability enquiries and information transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UE capability information messages are transmitted frequently to ensure network has up-to-date device capabilities, then network can best utilize UE features and capabilities, but overhead on wireless communications links increases and quality of service deteriorates
Solution Approach 1:
The network performs preliminary actions by maintaining a UE capability repository that stores capability information in advance. When a UE connects, the network checks the repository for existing capability data matching the UE's identifying characteristics before requesting new capability information. This preliminary check prevents unnecessary capability message transmissions and reduces communication overhead while ensuring the network has up-to-date capability information for reliable UE feature utilization.
2Ease of operation
If UE capability information messages are transmitted for every RRC connection to ensure accurate capability data, then network can appropriately configure radio resources, but signaling overhead increases and network capacity is consumed
Solution Approach 1:
Instead of requesting capability information from every UE connection, the network creates and stores capability information copies in the UE capability repository during initial UE capability reporting. When subsequent UEs with matching identifying characteristics connect, the network retrieves these stored copies rather than requesting new capability messages. This copying approach maintains accurate capability data for proper radio resource configuration while dramatically reducing signaling overhead and preserving network capacity.
3Adaptability or versatility
If the network requests UE capability information messages on every RRC connection to handle evolving device features, then network can support new RATs and features, but the increasing message length complicates communication and increases overhead
Solution Approach 1:
The solution segments the capability information handling process into two parts: (1) initial comprehensive capability reporting by the UE during first connection, and (2) subsequent retrieval of stored capability data from the repository for matching UEs. This segmentation allows the network to support evolving RATs and features through the initial comprehensive report while avoiding the complexity and overhead of transmitting full capability messages on every subsequent connection, as the repository stores and reuses the segmented capability data.
Data Source
AI summary
Systems and methods are provided for reducing overhead associated with user equipment (UE) capability information messages in order to improve overall network performance. A UE capability repository system includes a repository storing information correlating identifying characteristics of the UE with capabilities of the UE. In response to a connection request from a particular UE, the connection request including the identifying characteristics for the particular UE, the UE capability repository is searched for capabilities correlated with the identifying characteristics for the particular UE. Upon finding the capabilities correlated with the identifying characteristics, the UE capability repository system provides an access node with the capabilities, thereby avoiding sending of a UE capability enquiry message by the access node and the generation of a UE capability information message from the UE.