Secondary Cell Addition in Multi-Cell Connectivity
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing the addition and release of secondary cells in multi-cell connectivity configurations, which can impact user equipment (UE) performance and network resource allocation.
Innovation Solution
The method involves transmitting indications to add or release secondary cells within a multi-cell connectivity configuration, including communication protocols such as measurement gap management and UE assistance information to optimize the process for specific UEs, allowing for efficient addition and release of secondary cells.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If secondary cells are added to multi-cell connectivity configuration, then network capacity and user throughput are improved, but device complexity and management overhead increase
Solution Approach 1:
The system performs preliminary actions by configuring measurement gaps and criteria before secondary cell addition is needed. The network pre-configures measurement parameters, gap patterns, and evaluation criteria so that when a secondary cell needs to be added, the UE can immediately evaluate and report suitable cells without requiring complex real-time configuration negotiations.
Solution Approach 2:
The UE autonomously performs measurements during configured gaps, evaluates candidate cells against pre-configured criteria, and independently selects suitable secondary cells for reporting. This self-service approach eliminates the need for network-controlled cell evaluation and selection, significantly reducing management overhead while maintaining high network capacity.
2Measurement precision
If measurement gaps are configured for secondary cell evaluation, then cell selection accuracy is improved, but communication latency and time resources are consumed
Solution Approach 1:
Measurement gaps are configured as periodic intervals rather than continuous interruptions. The network configures specific gap patterns (e.g., every 40ms or 80ms) that allow the UE to periodically measure candidate cells without continuously disrupting data transmission. This periodic approach maintains measurement precision while minimizing overall communication latency.
Solution Approach 2:
The network pre-configures measurement gap patterns and duration before the UE needs to evaluate secondary cells. By having measurement parameters ready in advance, the UE can immediately start periodic measurements when needed, avoiding the time loss that would result from real-time configuration negotiations and reducing overall communication latency.
3Reliability
If multiple communications are used to add secondary cell, then configuration accuracy and reliability are improved, but signaling overhead and processing time increase
Solution Approach 1:
The patent merges multiple configuration messages into a single RRC Reconfiguration message that simultaneously conveys measurement gap configuration, secondary cell addition parameters, and activation commands. This consolidation maintains configuration accuracy by ensuring all parameters are coordinated in one reliable transmission, while eliminating the cumulative signaling overhead and processing delays that would result from multiple separate messages.
Data Source
AI summary
This disclosure provides systems, methods and apparatuses for adding and releasing secondary cells in a multi-cell connectivity configuration. In one aspect, a user equipment (UE) may transmit UE assistance information to a base station (BS) operating as a master cell in a multi-cell connectivity configuration. The UE assistance information may indicate a process that the BS is to use to add a secondary cell to the multi-cell connectivity configuration, may indicate a time gap for adding a secondary cell after another secondary cell is released from the multi-cell connectivity configuration, as well as other multi-cell connectivity configuration information. The BS may receive the UE assistance information and may add a secondary cell to the multi-cell connectivity configuration based at least in part on the indicated process and time gap.