Uplink Signaling Reduction for V2X Location Reporting
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Solution Overview
Problem
The frequent reporting of current location information by user equipment (UE) to a base station in V2X services leads to excessive occupancy of signaling radio bearer resources, increasing signaling overhead and reducing the overall utilization of radio resources, especially as the number of UE increases.
Innovation Solution
Implementing an uplink signaling reduction mechanism where the UE camps on a macro cell or accesses a small cell controlled by road side units (RSUs) and reports location information through X2 interfaces between RSUs and the base station, offloading signaling from the air interface to reduce macro network resource occupancy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the UE frequently reports current location to the base station through RRC messages, then the base station can obtain accurate location information for scheduling, but the signaling radio bearer resources are excessively occupied
Solution Approach 1:
The patent extracts the location reporting function from the traditional UE-to-base station path and relocates it to the RSU layer. The RSU now handles location reporting independently, removing this signaling burden from the macro network resources while maintaining the base station's ability to obtain location information when needed.
Solution Approach 2:
The RSU acts as an intermediary between the UE and the base station for location reporting. Instead of direct UE-to-base station signaling, the RSU receives and processes location information from the UE and can forward relevant information to the base station, reducing direct control plane signaling overhead.
2Productivity
If the number of UEs increases and reporting frequency increases, then more location information is available for scheduling, but the macro network resources are excessively occupied
Solution Approach 1:
The patent segments the signaling burden by separating location reporting functions into different layers: the RSU layer handles frequent location reporting from multiple UEs, while the macro network only receives summarized or event-driven location information from the RSU, rather than handling all individual UE reports directly.
Solution Approach 2:
The patent introduces a new dimension in the signaling architecture by adding the RSU layer as an intermediate processing level. This creates a hierarchical structure where location reporting occurs in the RSU domain, and only essential information is elevated to the macro network domain, effectively distributing the signaling load across different architectural dimensions.
Data Source
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AI summary
An uplink control plane signaling processing method and device for V2X services and a terminal are provided. When a base station indicates an uplink signaling reduction mechanism in first RRC signaling or second RRC signaling, a UE enables the uplink signaling reduction mechanism. The UE selects, based on macro cell uplink resources, to camp on a macro cell or to access a small cell controlled by a plurality of RSUs. The UE reports current location information through an X2 interface between the RSUs and an X2 interface between the RSU and the base station. The first RRC signaling is used for sending system information in system information broadcast.