Persistent Multicast Resource Allocation via MAP IE
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Solution Overview
Problem
Conventional resource allocation methods for multicast communication lead to inefficient frequent allocations and unnecessary power loss in mobile stations due to the need for frequent message decoding and resource updates.
Innovation Solution
A method and apparatus for persistently allocating multicast resources to a multicast group, using a MAP information element (IE) that includes allocation information, a period, and a lifetime, with periodic updates only when the lifetime expires, and utilizing a CRC masked with a multicast group ID for identification.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional resource allocation method is applied to multicast communication, then resource allocation can be performed for each user, but frequent resource allocations occur causing inefficiency and unnecessary power loss
Solution Approach 1:
The patent merges multiple users' resource allocation into a single multicast group allocation. Instead of allocating resources individually to each user as in conventional methods, the base station allocates a shared multicast resource pool that all group members can access simultaneously, eliminating redundant allocations and reducing signaling overhead
Solution Approach 2:
The patent implements periodic resource allocation where the base station allocates multicast resources at predetermined intervals rather than continuously or frequently. The allocation period is configured such that resources are assigned periodically, allowing mobile stations to enter sleep modes between allocations and significantly reducing power consumption while maintaining service continuity
2Reliability
If frequent resource allocation messages are transmitted, then resource allocation information can be updated, but mobile stations must frequently decode messages causing power loss
Solution Approach 1:
The patent ensures continuous resource availability for multicast groups by establishing persistent allocations that remain valid throughout the allocation period. Once resources are allocated to a multicast group, they remain continuously available to all group members without requiring frequent re-allocation messages, ensuring uninterrupted service while reducing signaling frequency
Solution Approach 2:
The base station performs preliminary resource allocation by pre-assigning multicast resources to groups before users need them. The allocation includes predetermined time slots, frequency resources, and modulation schemes that are prepared in advance, allowing mobile stations to know ahead of time when and how to receive transmissions without continuously monitoring for updates
Data Source
AI summary
A method of allocating a multicast resource to a multicast group for a multicast communication in a base station is provided. The base station persistently allocates the multicast resource to the multicast group, generates a MAP IE including allocation information of the multicast resource, an allocation period indicating a period in which the multicast resource is allocated and a lifetime in which allocation of the multicast resource is maintained, and transmitting the MAP IE to the multicast group.