Multicast Broadcast Data Information Element Placement
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Solution Overview
Problem
In wireless networks using the IEEE standard 802.16, mobile stations (MS) experience high power consumption due to prolonged synchronization with multicast and broadcast service (MBS) maps, as they often miss initial MBS-MAPs and need to wait for subsequent frames to acquire synchronization, leading to inefficient data frame processing.
Innovation Solution
The method involves generating additional MBS data information elements (MBS-DATA-IEs) in specific data frames between the initial and subsequent frames, indicating the location of MBS maps, which reduces the time MS spends searching for synchronization, thereby lowering power consumption and operation overhead.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If MBS data is transmitted using conventional IEEE 802.16 data frames with single MBS-DATA-IEs, then the network structure remains simple and easy to implement, but mobile stations experience prolonged synchronization time and high power consumption
Solution Approach 1:
The patent segments the MBS data transmission by dividing it into multiple logical channels, each with its own MBS-DATA-IE. This segmentation allows MS to efficiently manage synchronization across multiple channels rather than searching through a single complex structure, reducing power consumption while maintaining implementability.
Solution Approach 2:
The patent implements preliminary action by placing MBS-DATA-IEs in advance within data frames before the actual MBS data bursts. This allows mobile stations to pre-acquire synchronization information and channel locations, eliminating the need for prolonged searching and reducing power consumption during operation.
2Productivity
If MS waits for subsequent MBS-MAPs to acquire synchronization after missing the initial map, then the network maintains standard compliance, but synchronization time increases and data frame processing efficiency decreases
Solution Approach 1:
The patent places MBS-DATA-IEs in advance within data frames, allowing mobile stations to acquire synchronization information proactively before needing to access MBS data. This preliminary provision of synchronization data eliminates waiting time and immediately improves data frame processing efficiency.
Solution Approach 2:
The MBS-DATA-IE acts as an intermediary element that bridges the gap between MBS-MAP information and actual MBS data bursts. By providing this intermediate information structure within data frames, the patent enables faster synchronization without requiring MS to wait for subsequent MBS-MAPs, thus reducing synchronization time while maintaining standard compliance.
3Loss of time
If multiple MBS-DATA-IEs are added to data frames to improve synchronization speed, then synchronization time decreases and power consumption reduces, but the complexity of data frame generation and processing increases
Solution Approach 1:
The patent segments MBS data into multiple logical channels, each represented by its own MBS-DATA-IE within data frames. This segmentation approach systematically organizes the multiple information elements, making the increased complexity manageable through structured division rather than a monolithic complex structure.
Solution Approach 2:
The patent creates a universal MBS-DATA-IE structure that can be repeatedly applied across multiple logical channels and data frames. This multi-functional template approach allows the system to handle multiple channels efficiently without proportionally increasing complexity, as the same structural pattern is reused across different channels and frames.
Data Source
AI summary
A method for providing a multicast and broadcast service (MBS) by transmitting a plurality of data frames in a wireless network. The method includes: generating a first MBS data information element (MBS-DATA-IE) in a first one of the data frames, the first MBS-DATA-IE including information relating to a logical channel of the MBS, and indicating a location of an MBS map (MBS-MAP) in a second one of the data frames; determining ones of the data frames between the first and second ones of the data frames in which to add a plurality of extra MBS-DATA-IEs; and generating the extra MBS-DATA-IEs, the extra MBS-DATA-IEs being generated in the determined ones of the data frames and including information relating to the logical channel.