Cluster UE Bearer Switching for Service Continuity
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Solution Overview
Problem
The existing cluster communication systems face challenges in maintaining service continuity when a user equipment (UE) moves out of the MBMS coverage area or experiences poor MBSFN signal quality, as there is no effective method to switch from MBMS to unicast bearers, disrupting communication services.
Innovation Solution
A method where the cluster user equipment (UE) assesses conditions such as MBSFN area coverage and signal quality to determine if a unicast bearer is needed, and if so, sends a request to the cluster application server to establish a unicast bearer, ensuring continuous communication service by switching from MBMS to unicast transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cluster service is transmitted via MBMS bearer to improve network resource utilization, then the service coverage and resource efficiency are improved, but the service continuity is disrupted when UE moves out of MBMS coverage area or experiences poor signal quality
Solution Approach 1:
The patent implements dynamic bearer switching between MBMS and unicast based on real-time service continuity requirements. When UE moves out of MBMS coverage or experiences poor signal quality, the system dynamically switches from MBMS bearer to unicast bearer to maintain service continuity, while returning to MBMS bearer when conditions improve, thus resolving the contradiction between resource efficiency and service reliability
Solution Approach 2:
The patent changes the transmission mode parameter from static MBMS to dynamic switching between MBMS and unicast bearers. By monitoring service continuity conditions and adjusting the bearer type parameter accordingly, the system achieves both high network resource utilization through MBMS and reliable service continuity through unicast fallback
2Reliability
If the cluster service is transmitted via unicast bearer to ensure service continuity, then the service reliability is improved, but the network resource utilization and efficiency deteriorate
Solution Approach 1:
The patent applies unicast bearer only partially and selectively - specifically when service continuity conditions are not met (UE out of MBMS coverage or poor signal quality). For normal conditions, MBMS bearer is used for efficient group communication. This partial application of unicast ensures service continuity only when necessary, avoiding excessive network resource consumption
3Productivity
If the MBMS scheduling and control signaling are configured semi-statically to improve resource efficiency, then the network resource utilization is improved, but the adaptability to changing service conditions deteriorates
Solution Approach 1:
The patent introduces dynamic adaptability to semi-static MBMS configuration by implementing conditional bearer switching. While MBMS scheduling remains semi-static for resource efficiency, the system dynamically adapts by switching to unicast bearer when service conditions change (UE moves out of coverage or signal quality degrades), thus maintaining both resource efficiency and adaptability
Data Source
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AI summary
The embodiment of the present invention discloses a cluster communication method and system, a user equipment and a network side device, related to wireless communication technologies. The cluster communication method disclosed in the embodiment of the present invention includes: when a cluster user equipment (UE) is interested in receiving or is currently receiving a a cluster service in a multimedia broadcast multicast service (MBMS) bearer, if the cluster UE judges that it is needed to transmit the cluster service via a unicast bearer, sending a request to a cluster application server (AS) for transmitting the cluster service via a unicast bearer; after the AS accepts the request of the cluster UE and establishes a unicast bearer with the cluster UE, the cluster UE receiving cluster data via the unicast bearer and stopping receiving the cluster data in the MBMS bearer. The embodiment of the present invention further discloses a user equipment, a network side device and a cluster communication system. The technical solution of the present application can be used to achieve a unicast transmission of cluster communication when the cluster user equipment (UE) does not meet conditions for receiving the cluster service via an MBMS bearer, thus ensuring the continuity of the cluster communication service and reducing the impact on the radio access network.