Generic Broadcast Bearer for Scalable Group Communication
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Solution Overview
Problem
Current wireless communication systems face scalability issues and inefficiencies in group communication, particularly in LTE/LTE-A networks, due to the need for pre-established MBMS bearers which lead to signaling-bit explosions and battery drainage in large group communications.
Innovation Solution
Implementing a generic pre-established broadcast bearer for fast service initiation, allowing terminals to monitor a single bearer for multiple services, with precise service identity signaled in-band, and transitioning to service-specific bearers once active, reducing unnecessary signaling and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If pre-established MBMS bearers are used for group communication, then group call setup delay is reduced, but signaling overhead increases exponentially
Solution Approach 1:
The patent introduces a generic pre-established broadcast bearer that can serve multiple services and group communications simultaneously. Instead of creating dedicated MBMS bearers for each service, a single generic bearer is established that can carry multiple services, thereby reducing the exponential growth of signaling overhead while maintaining fast setup times.
Solution Approach 2:
The patent pre-establishes a generic broadcast bearer before services are activated. This preliminary action allows services to be quickly activated without the overhead of establishing individual bearers for each service, thus reducing setup delay while controlling signaling overhead through the use of a shared bearer structure.
2Speed
If pre-established MBMS bearers are used for each service, then service activation is fast, but battery power consumption increases
Solution Approach 1:
The generic broadcast bearer serves multiple services simultaneously, allowing UEs to remain connected to a single bearer while receiving multiple services. This eliminates the need for UEs to monitor multiple separate bearers, thereby reducing power consumption while maintaining fast service activation through the pre-established generic bearer.
Solution Approach 2:
The patent merges multiple service-specific bearers into a single generic broadcast bearer. By combining the functionality of multiple bearers into one, the UE's monitoring and processing requirements are reduced, leading to lower battery power consumption while preserving rapid service activation capabilities.
3Reliability
If pre-established MBMS bearers are implemented in LTE networks, then group communication requirements are met, but system scalability is limited
Solution Approach 1:
The generic broadcast bearer provides a universal foundation that can support any number of services and group communications within an MBSFN area. This universal structure allows the system to scale dynamically to accommodate unlimited receiver group members without being constrained by the number of pre-configured bearers, thereby improving system scalability while meeting group communication requirements.
Data Source
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AI summary
A method is disclosed for group communication in a communications system, the method comprising monitoring (301), in a user terminal (100, 102), for broadcasted service data on a generic broadcast bearer associated with communication services. In response to receiving an indication of broadcasted service data appearing on the generic broadcast bearer, the user terminal (100, 102) may receive (303) broadcasted service data on the generic broadcast bearer. In response to a separate service-specific broadcast bearer being established for a specific communication service, the user terminal may receive (306) broadcasted service data related to the specific communication service on the service-specific broadcast bearer.