Multicast Wireless Device Cell Reselection Optimization
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Solution Overview
Problem
Electronic devices experience communication delays or disconnections when switching from multicast mode to unicast mode when moving out of an area that supports Multimedia Broadcast Multicast Service (MBMS), leading to disruptions in wireless communication.
Innovation Solution
An electronic device is equipped with a communication circuit, memory, and processor that stores MBMS support and nonsupport lists, allowing it to maintain multicast-mode communication by restricting measurement reports for cells not supporting MBMS and updating cell reselection priorities to prioritize cells that do support MBMS.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electronic device switches to unicast mode when moving out of MBMS-supported areas, then communication can be maintained, but communication delays and disconnections occur
Solution Approach 1:
The electronic device performs preliminary actions by storing MBMS support lists of cells in advance, maintaining multicast mode communication when moving between cells, and only switching to unicast mode when necessary. This preliminary preparation of MBMS support information allows the device to maintain optimal communication mode without unnecessary switches, thereby reducing communication delays and maintaining continuity.
2Ease of operation
If the electronic device performs measurement reports for all detected cells, then cell reselection can be optimized, but unnecessary mode switching occurs to unicast mode
Solution Approach 1:
The electronic device applies local quality by differentiating measurement report actions based on the MBMS support status of detected cells. When a detected cell is in the MBMS support list, the device performs measurement reports to optimize cell reselection. When a detected cell is in the MBMS non-support list, the device restricts measurement reports to prevent unnecessary mode switching. This localized differentiation maintains multicast mode communication while still optimizing cell reselection where applicable.
3Adaptability or versatility
If the electronic device switches communication mode frequently, then it adapts to different network conditions, but communication stability deteriorates
Solution Approach 1:
The electronic device performs preliminary actions by maintaining multicast mode communication as long as possible using stored MBMS support lists, and only switches to unicast mode when explicitly necessary (when moving to a non-MBMS supported cell). This preliminary maintenance of a single communication mode reduces frequent switching, thereby improving communication stability while still adapting to network conditions through the cell reselection optimization process.
Data Source
AI summary
A device and a method for performing wireless communication based on a multicast mode in an electronic device are provided. The electronic device includes a communication circuit, a memory, and at least one processor, wherein the at least one processor may receive data from a first cell supporting the multimedia broadcast multicast service (MBMS) through the communication circuit, based on a multicast mode, may detect a second cell, based on channel state information about the first cell, may perform a measurement report related to the second cell when the second cell is included in the MBMS support list, and may restrict the measurement report related to the second cell when the second cell is included in the MBMS nonsupport list.