Cell Access Procedure Optimization via Standalone Indications
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Solution Overview
Problem
In wireless communication systems, devices often inefficiently attempt to access cells that do not support standalone operation, leading to repeated access requests being rejected, which wastes battery power and incurs unnecessary signaling costs for both devices and networks.
Innovation Solution
The base station transmits indications to devices about which public land mobile networks (PLMNs) a cell supports for standalone access, allowing devices to determine whether to request standalone or dual connectivity mode based on these indications, thereby optimizing access procedures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If devices attempt to access cells without checking standalone access support, then devices can maintain simple access procedures, but unnecessary access requests are generated wasting battery power and network resources
Solution Approach 1:
The base station transmits standalone access support indications to devices before devices attempt access. This preliminary information provision allows devices to determine whether to initiate access procedures, preventing wasted energy on futile access attempts to cells that don't support standalone access for their PLMN.
2Productivity
If devices transmit access requests to all detected cells, then devices ensure comprehensive cell access attempts, but repeated rejections increase signaling costs and network load
Solution Approach 1:
The base station provides standalone access support indications in advance through system information blocks or other signaling mechanisms. Devices use this information to filter their access decisions, transmitting requests only to cells that support standalone access for their PLMN, thereby reducing unnecessary signaling and network load.
3Adaptability or versatility
If devices lack information about cell standalone access support, then devices cannot make informed access decisions, but providing such information increases base station signaling burden
Solution Approach 1:
The standalone access support information is segmented by PLMN identity, with each cell indicating support status for multiple PLMNs. This structured segmentation allows base stations to efficiently manage signaling by providing targeted information only relevant to each device's PLMN, reducing overall signaling burden while maintaining high adaptability.
Solution Approach 2:
The base station uses existing system information block structures to convey standalone access support indications, making the existing signaling infrastructure serve multiple functions: both traditional system information broadcast and standalone access capability indication. This avoids creating entirely new signaling mechanisms.
Data Source
AI summary
A method comprising: detecting at a device associated with a first public land mobile network, a cell; receiving, for each of a plurality of public land mobile networks supported by the cell, an indication as to whether or not the cell is available for standalone access for that public land mobile network; and determining, in dependence upon the indications and based on the first public land mobile network, whether to request standalone access of the cell.