MBS Session Context Exchange for Base Station Coordination
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Solution Overview
Problem
In wireless communications systems, base stations lack knowledge of multicast-broadcast services (MBS) sessions supported by neighboring base stations, leading to inadequate handover decisions, interference coordination, and system information construction, which affects connectivity, data rates, and system capacity.
Innovation Solution
Implementing a signaling mechanism for exchanging MBS session context information between base stations, allowing them to share knowledge of MBS sessions, including availability, radio bearer configurations, and single-frequency network settings, to coordinate handovers and interference avoidance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If base stations operate independently without exchanging MBS session context information, then device complexity and signaling overhead are reduced, but handover decisions become inadequate and interference coordination fails
Solution Approach 1:
The patent introduces an intermediary signaling mechanism where base stations exchange MBS session context information through defined interfaces. This intermediary system enables coordinated handover decisions and interference management without requiring complex direct peer-to-peer coordination between all base stations, thus improving reliability while controlling complexity
Solution Approach 2:
The patent implements preliminary action by having base stations proactively share MBS session context information before handover events occur. This advance information exchange enables receiving base stations to prepare appropriate handover decisions and interference coordination strategies in advance, improving the quality of handover decisions without adding complex real-time coordination mechanisms
2Productivity
If base stations exchange MBS session context information with neighboring base stations, then connectivity and data rates improve through informed handover decisions, but signaling overhead and network complexity increase
Solution Approach 1:
The patent extracts only the essential MBS session context information needed for handover decisions and interference coordination, rather than exchanging complete base station configurations. This selective information extraction reduces signaling overhead while still providing sufficient data to improve connectivity and maintain data rates through informed handover decisions
3Object-affected harmful factors
If base stations coordinate MBS sessions using shared knowledge, then interference coordination improves, but the complexity of managing coordinated sessions increases
Solution Approach 1:
The patent uses copying by having base stations share MBS session context information that can be replicated and used for coordination decisions. Instead of implementing complex real-time collaborative algorithms, base stations copy and utilize the session context information from neighboring base stations to make independent but coordinated decisions, reducing interference while managing complexity
Data Source
AI summary
Methods, systems, and devices for wireless communications are described. In some systems, a first base station and a second base station may be neighbor base stations and the first base station may receive, from the second base station, information relating to a multicast-broadcast services (MBS) session context of an MBS session supported by the second base station. The first base station may use the received MBS session context information to control communication or connections between the first base station and one or more user equipment (UEs) that are served by the first base station. For example, the first base station may use the received MBS session context information for target cell selection in a handover procedure, an MBS-specific measurement configuration, interference avoidance, or system information block (SIB) construction, among various other use cases.