Cell Selection via Carrier-Aggregation Policy Broadcasting
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
User equipment (UEs) in cellular wireless networks often select cells based on reference signal strength alone, unaware of carrier-aggregation policies, leading to suboptimal service due to inefficient cell selection.
Innovation Solution
Each cell broadcasts its carrier-aggregation policy on the air interface, allowing UEs to read and evaluate these policies during the cell selection process to choose cells that support carrier aggregation optimally based on their capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If UEs select cells based on reference signal strength alone, then the cell selection process is simple, but the service quality is suboptimal due to inefficient cell selection
Solution Approach 1:
The cell broadcasts its carrier-aggregation policy in advance during the cell selection process, allowing the UE to evaluate both reference signal strength and carrier-aggregation capabilities before making a selection decision. This preliminary provision of information enables more informed cell selection without significantly complicating the process.
Solution Approach 2:
The carrier-aggregation policy signal acts as an intermediary that carries additional information about the cell's capabilities. This intermediary enables the UE to understand not just the signal strength but also the bandwidth and service capabilities of the cell, leading to better matching between UE capabilities and cell offerings.
2Reliability
If UEs evaluate carrier-aggregation policies during cell selection, then service quality improves through better bandwidth matching, but the cell selection process becomes more complex
Solution Approach 1:
The carrier-aggregation policy is broadcast in advance as part of the cell's signaling, so the UE receives this information during normal cell scanning and evaluation. This preliminary provision of information allows the UE to consider carrier-aggregation capabilities without requiring additional complex processing or separate evaluation steps.
Solution Approach 2:
The cell autonomously provides its own carrier-aggregation policy information through broadcasting, eliminating the need for the UE to request or infer this information through complex interactions. The UE simply reads the broadcast policy and uses it in its selection criteria, keeping the process relatively simple while improving service quality.
3Loss of information
If cells broadcast carrier-aggregation policies, then UEs can make informed selection decisions, but the air interface requires additional signaling resources
Solution Approach 1:
The carrier-aggregation policy information is merged with existing cell broadcast signals and system information messages. By combining this new information with already-transmitted signaling, the patent avoids dedicating separate resources solely for carrier-aggregation policy transmission, thus minimizing the additional air interface resource requirements.
Solution Approach 2:
The broadcast signaling infrastructure, originally designed for general system information transmission, is made multi-functional by also carrying carrier-aggregation policy information. This universal use of existing signaling channels allows the policy information to be transmitted without requiring dedicated new resources, as the same channels serve multiple purposes.
Data Source
AI summary
According to aspects of the disclosure, a method and system are provided for managing cell selection in a wireless communication network. In accordance with this disclosure, each cell in a radio access network (RAN) broadcasts a respective carrier-aggregation policy of the cell on its air interface. A UE engaging in a cell selection process reads the respective carrier-aggregation policy of each cell under consideration and selects a cell on which to attach based at least in part on the respective carrier-aggregation policies of the cells. The UE can then attach to the selected cell so that the selected cell can then serve the UE.