MBS_MAP Message Structure for Continuous Multicast Reception
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Solution Overview
Problem
In IEEE 802.16 wireless communication systems, Mobile Service Stations (MSS) cannot accurately determine the physical channel resources and Downlink Interval Usage Code (DIUC) for the next Multicast and Broadcast Service (MBS) frame, preventing direct reception of MBS services due to incomplete information in the current MBS_MAP message.
Innovation Solution
Adding information about the next MBS_MAP message to the current MBS_MAP message, allowing MSS to determine and receive the next MBS_MAP message without relying on the DL_MAP message, thereby enabling direct reception of MBS services by configuring physical channel resources and DIUC.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If MSS receives DL_MAP message to determine next MBS frame location, then MSS can locate MBS frames, but MSS cannot determine physical channel resources and DIUC for next MBS_MAP message
Solution Approach 1:
The patent applies preliminary action by including information about the next MBS_MAP message (physical channel resources, DIUC, and location) in the current MBS_MAP message. This allows the MSS to be prepared in advance for receiving the next MBS_MAP message without needing to decode the DL_MAP message each time, thus preventing information loss while maintaining location determination accuracy.
2Reliability
If MSS remains in active state to receive DL_MAP message, then MSS can obtain MBS frame location information, but power consumption increases
Solution Approach 1:
By embedding next MBS_MAP message information in the current MBS_MAP message, the patent enables MSS to enter idle state after receiving MBS service configuration. The MSS can wake up at predetermined times to receive only the essential MBS_MAP messages without continuously monitoring DL_MAP, thus maintaining reliable MBS service reception while significantly reducing power consumption.
Solution Approach 2:
The patent extracts the essential MBS service reception information (physical channel resources, DIUC, and next MBS_MAP location) from the DL_MAP message and places it directly in the MBS_MAP message. This extraction allows MSS to discard the DL_MAP message after obtaining the critical information, eliminating the need to remain active for continuous DL_MAP monitoring and thereby reducing power consumption.
3Ease of operation
If MBS_MAP message contains complete next frame information, then MSS can directly receive MBS service, but MBS_MAP message complexity increases
Solution Approach 1:
The patent merges the MBS service configuration information with the next MBS_MAP message information into a single MBS_MAP message structure. By combining these information elements, the patent enables MSS to receive complete MBS service reception parameters in one message, greatly simplifying the reception process while the increased complexity is confined to the message structure rather than the reception procedure.
Data Source
AI summary
Embodiments of the present invention provide a method for receiving Multicast and Broadcast Service (MBS), include: adding information of a next MBS_MAP message in a current MBS_MAP message; determining receiving information of the next MBS_MAP message according to the current MBS_MAP message and the information added in the current MBS_MAP message, receiving the next MBS_MAP message according to the receiving information determined, and receiving the MBS service according to the next MBS_MAP message received. The embodiments of the present invention also provide two other methods, apparatus and a system for receiving the MBS service. The method, system and apparatus provided by the embodiments of the present invention implement the continuous receiving of the MBS service without the requirement of frequent receiving the DL_MAP message.