Network Node Connection Messages for 5G Cell List Handling
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Solution Overview
Problem
The scalability issue in 5G wireless communication networks is exacerbated by the need to process large messages containing lists of served cells, which can exceed the memory and decoding capacity of network nodes, leading to potential failures during connection establishment procedures like EN-DC X2 and Xn setup.
Innovation Solution
Incorporating indicators in messages related to connection establishment, such as Partial List Indicator, Maximum Cell List Size, and Message Oversize Notification, to allow network nodes to handle partial lists and manage message size limitations, thereby avoiding failures due to oversized messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If network nodes transmit complete lists of served cells during connection establishment, then connection setup information is comprehensive, but message size exceeds memory and decoding capacity of network nodes
Solution Approach 1:
The patent segments the complete list of served cells into multiple parts: a first subset of cells included in the initial connection establishment message, and a second subset of cells excluded from that message. This segmentation allows the message size to be reduced to within acceptable limits while still providing sufficient information for connection establishment, with the understanding that not all cell information needs to be transmitted upfront.
Solution Approach 2:
The patent extracts only the necessary portion of cell information (first subset of served cells) from the complete list and includes it in the connection establishment message. The remaining cell information (second subset) is deliberately excluded from the message to prevent size issues, while the receiving node can still establish connections using the provided subset.
2Loss of information
If network nodes process large messages containing complete cell lists, then all cell information is available for processing, but processing capacity and memory requirements are exceeded
Solution Approach 1:
The patent applies partial action by transmitting only a first subset of served cells rather than the complete list. This partial information is sufficient for the receiving node to establish necessary connections, avoiding the need to process excessive data that would exceed memory and decoding capacity while still achieving the essential function of connection establishment.
3Adaptability or versatility
If maximum number of cells is increased to support more served cells, then network capacity is improved, but message size and processing load increase leading to failures
Solution Approach 1:
The patent segments the served cells into a first subset (included in messages) and a second subset (excluded from messages). This allows the network to support a high total number of served cells (high adaptability) while only transmitting a manageable subset in each message, preventing message size-related failures and maintaining connection establishment reliability.
Data Source
AI summary
The present disclosure relates to telecommunications. In one of its aspects, the disclosure concerns a method, performed by a first network node, for handling communication in a wireless communication system. The method comprises transmitting, to a second network node, a message related to a connection establishment between the first network node and the second network node, wherein the message comprises at least one of: a first indication indicating whether a list of served cells of the first network node comprised in the message is a partial list of cells; a second indication indicating a maximum number of cells in a list of served cells of the second network node that the first network node can receive; and a third indication indicating a reason for a failure of the connection establishment.