UE MBS Reception Gap Configuration for Inter-Frequency Service
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Solution Overview
Problem
In 5G/NR mobile communication systems, user equipment faces challenges in receiving multicast and broadcast services from neighboring cells on different frequencies while maintaining communication with a serving cell, due to limited reception devices and coordination issues between network nodes.
Innovation Solution
The communication method involves the user equipment transmitting a message to its serving cell to configure a reception gap for receiving multicast and broadcast services from a neighboring cell on a different frequency, allowing simultaneous communication with the serving cell and reception from the neighboring cell.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If user equipment receives multicast and broadcast services from a neighboring cell on a different frequency, then service availability is improved, but communication with the serving cell is disrupted
Solution Approach 1:
The patent segments the reception process by introducing separate reception gaps for serving cell communication and neighboring cell MBS reception. The terminal device switches between different reception modes at different time intervals, allowing simultaneous access to both cells without interference. This segmentation resolves the contradiction by dividing the time resource into distinct segments for different purposes.
Solution Approach 2:
The patent implements periodic switching between serving cell communication and neighboring cell MBS reception through configured reception gaps. The terminal device periodically transitions between active communication mode and MBS reception mode according to pre-configured timing, enabling systematic access to both cells. This periodic action ensures that neither communication nor MBS reception is continuously disrupted.
2Device complexity
If user equipment uses limited reception devices for both serving cell communication and neighboring cell MBS reception, then device complexity is reduced, but reception quality deteriorates
Solution Approach 1:
The patent employs periodic time-division switching where the terminal device alternates between serving cell communication and neighboring cell MBS reception in regularly spaced reception gaps. This periodic action allows a single reception device to sequentially access both cells with sufficient signal quality, avoiding the need for multiple simultaneous reception devices while maintaining acceptable reception performance.
Solution Approach 2:
The patent introduces dynamic time-gap configuration where the reception gap pattern can be adjusted based on terminal capability and service requirements. The network can configure different gap patterns (e.g., more frequent or longer gaps) to optimize the balance between communication continuity and MBS reception quality, adapting the reception strategy to specific scenarios.
3Reliability
If network coordinates multiple nodes for inter-frequency MBS reception, then service reliability is improved, but system complexity increases
Solution Approach 1:
The patent implements preliminary configuration of reception gap patterns by the serving cell before the terminal needs to receive MBS from neighboring cells. The serving cell provides pre-configured timing and frequency information for MBS reception, allowing the terminal to prepare and switch seamlessly. This preliminary action reduces the need for complex real-time coordination during actual MBS reception.
Solution Approach 2:
The patent uses the serving cell as an intermediary that coordinates between the terminal and neighboring cells for MBS reception. The serving cell provides configuration information, manages reception gap patterns, and facilitates the terminal's access to neighboring cell MBS services. This intermediary role simplifies the coordination burden by centralizing control in the serving cell rather than requiring direct terminal-neighboring cell negotiation.
Data Source
AI summary
In a first aspect, a communication method is a method executed by a user equipment (UE 100) communicating with a first cell (cell #1) in a mobile communication system providing a multicast and broadcast service (MBS). The communication method includes transmitting, to the first cell, a message related to an MBS reception timing for the user equipment to perform MBS reception from a second cell (cell #2) belonging to a frequency different from a frequency to which the first cell belongs (S106).