MBS Session Activation via RAN Paging in Inactive UEs
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Solution Overview
Problem
There is a lack of clarity in how a radio access network (RAN) should notify user equipment (UE) of the activation of broadcast services, and how UE can distinguish notifications of broadcast services from notifications of multicast services.
Innovation Solution
A method in a UE for activating reception of multicast and/or broadcast services (MBS) involves operating in an inactive state of a protocol for controlling radio resources, receiving a message including an MBS session identifier from a radio access network (RAN), and initiating reception of MBS data corresponding to the MBS session ID in response to the message.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If the RAN sends activation notifications for MBS services, then UEs can receive MBS data, but it is unclear how UEs can distinguish broadcast service notifications from multicast service notifications
Solution Approach 1:
The patent segments the service notification mechanism by introducing distinct message types: one for multicast service activation and another for broadcast service activation. This segmentation allows UEs to clearly distinguish between different service types without increasing overall system complexity, as each service type has its own dedicated notification pathway.
2Use of energy by moving object
If UEs operate in inactive state to conserve resources, then energy consumption is reduced, but the UE cannot receive or process service activation messages
Solution Approach 1:
The patent introduces a paging message as an intermediary mechanism that allows the RAN to notify UEs in inactive state about MBS service activations without requiring the UE to maintain an active connection. The paging message serves as a lightweight mediator that bridges the inactive UE and the network, enabling service activation notification while preserving the energy-saving benefits of the inactive state.
Data Source
AI summary
To activate reception of multicast and/or broadcast services (MBS), a UE operating in an inactive state of a protocol for controlling radio resources receives, in the inactive state from a radio access network (RAN), a message including an MBS session identifier (ID). The UE initiates reception of MBS data corresponding to the MBS session ID in response to the message.