Multicast Service Configuration for RRC Inactive Mobility
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Solution Overview
Problem
Existing communication technologies face challenges in effectively configuring multicast services for terminal devices in an inactive state, particularly due to mobility issues and the need for multi-cell support.
Innovation Solution
A configuration method and apparatus that allows terminal devices to receive multicast services in an inactive state by utilizing configuration information sent by a network device, enabling multi-cell support and allowing devices to maintain service reception after movement without re-establishing an RRC connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminal devices operate in RRC connected state to receive multicast service, then service reception is reliable, but power consumption and device complexity increase
Solution Approach 1:
The patent enables terminal devices to dynamically switch between RRC connected state and RRC inactive state while receiving multicast services. The network device provides configuration information that allows terminals to receive multicast services in inactive state, enabling flexible state transitions that reduce power consumption while maintaining service reliability.
Solution Approach 2:
The patent changes the operational parameters of terminal devices by allowing multicast service reception in RRC inactive state. The network device configures specific parameters (first configuration information) that enable terminals to operate in inactive state for multicast services, fundamentally changing the requirement from connected state only.
2Use of energy by moving object
If terminal devices in inactive state receive multicast service, then power consumption is reduced, but mobility management becomes complex
Solution Approach 1:
The network device performs preliminary actions by providing configuration information (first configuration information) to terminal devices before they move. This configuration includes parameters that enable multicast service reception in inactive state across multiple cells, preparing the terminals in advance for mobility scenarios without requiring complex real-time decisions.
Solution Approach 2:
The network device acts as an intermediary by providing configuration information that mediates between the terminal device's inactive state operation and the multicast service reception requirements. This configuration information serves as an intermediary mechanism that enables seamless multicast service delivery without requiring terminals to transition to connected state.
3Speed
If terminal devices move in inactive state, then mobility is maintained, but service continuity is lost without multi-cell configuration
Solution Approach 1:
The patent implements multi-cell multicast service configuration where a single configuration information set from the network device can be used across multiple cells. This universal configuration approach allows terminal devices to maintain service continuity when moving between cells while remaining in inactive state, eliminating the need for cell-specific reconfiguration.
Solution Approach 2:
The network device provides configuration information in advance that covers multiple cells, enabling terminal devices to maintain service continuity before actually moving. This preliminary multi-cell configuration ensures that when terminals move to different cells, they can continue receiving multicast services without interruption or connection resumption.
Data Source
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AI summary
Embodiments of this application provide a configuration method and apparatus for a multicast service. The method includes: receiving a first message sent by a first network device, where the first message includes at least one set of first configuration information for transmission of a first multicast service; and receiving, based on the first message in an inactive state, the first multicast service sent by a second network device. The first message sent by the first network device is received in a connected state, and the at least one set of configuration information for transmission of the first multicast service by the second network device may be determined in the first message. Then, even if a terminal device moves in the inactive state, the terminal device may also receive, from a cell where the terminal device is located after moving, the first multicast service sent by the second network device corresponding to the cell. In this way, multicast service configuration the for the terminal device in the inactive state may be effectively implemented, and the terminal device in the inactive state may effectively receive a multicast service before and after moving.