Multicast Group De-registration via Message Omission in Wireless Networks
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Solution Overview
Problem
Conventional wireless communication systems face inefficiencies and delays in managing multicast group memberships, particularly in de-registering members from multicast groups, which can lead to unnecessary transmissions and system performance degradation.
Innovation Solution
An access terminal sends a second multicast registration message omitting specific multicast groups to request de-registration, allowing the access network to interpret this as a request to de-register from those groups, thereby updating the group membership list and reducing unnecessary transmissions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional wireless communication systems use traditional multicast registration methods, then multicast group membership can be established, but de-registration processes cause unnecessary transmissions and system performance degradation
Solution Approach 1:
Instead of requiring the access terminal to explicitly list multicast groups it wishes to remain registered for (positive registration), the patent inverts the approach by allowing the terminal to omit groups it wishes to de-register from (negative registration). This inversion enables more efficient de-registration by leveraging the difference between the current registration state and the new registration state to identify groups for removal.
Solution Approach 2:
The patent changes the parameter of multicast group registration from a positive listing mechanism to a negative omission mechanism. By allowing the access terminal to send registration requests that omit specific multicast groups rather than explicitly listing groups to join, the system achieves more efficient membership management and reduces unnecessary transmissions.
2Loss of information
If the access network maintains complete multicast group membership information, then accurate group member information is available, but system overhead and processing complexity increase
Solution Approach 1:
The patent applies local quality by allowing different treatment of multicast group information at different locations in the system. The access terminal maintains complete information locally for accuracy, while the access network uses a more streamlined approach by relying on omission-based registration messages to update its records, reducing the overhead of maintaining and processing complete membership information everywhere.
3Measurement precision
If the access terminal sends explicit de-registration messages for each multicast group, then de-registration is precise, but message overhead and processing time increase
Solution Approach 1:
The patent inverts the de-registration approach by allowing the access terminal to send a single registration message that omits groups it wishes to leave, rather than sending separate de-registration messages for each group. This inversion achieves precise de-registration (the network can identify which groups to remove by comparing old and new registration lists) while significantly reducing the number of messages and processing time required.
Data Source
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AI summary
Aspects of de-registering a multicast group member from a multicast group within a wireless communications network are disclosed. An access terminal sends a first multicast registration message to an access network, with the first multicast registration message identifying a first set of multicast groups. The access network receives the first multicast registration message and registers the access terminal for each of the first set of multicast groups. The access terminal sends a second multicast registration message, the second multicast registration message omitting at least one multicast group from among the first set of multicast groups, the second multicast registration message being sent to request de-registration, for the access terminal, from at least one multicast group. The access network receives the second multicast registration message and interprets the second multicast registration message as a request to de-register the access terminal from the omitted at least one multicast group.