Burst Generation Method for Downlink Subframe Allocation
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Solution Overview
Problem
In 4G communication systems, particularly in IEEE 802.16, the concatenation of PDU[CID]s during downlink burst allocation leads to an increased MAP size, which can result in terminal inability to decode received data bursts due to mismatched burst sizes.
Innovation Solution
A method is introduced where a base station estimates allocable PDUs based on scheduling priority, generates bursts to ensure they are decodable by terminals, and allocates them within downlink subframes, ensuring the total burst size does not exceed the maximum allocable size, using techniques such as fragmentation and concatenation while maintaining optimal MAP size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple PDU[CID]s are concatenated to generate one burst, then the number of bursts is reduced, but the MAP size increases undesirably
Solution Approach 1:
The invention segments the concatenation process by introducing a fragmentation mechanism that divides large concatenated PDU[CID] sets into smaller bursts. This segmentation allows multiple PDUs to be distributed across multiple smaller bursts rather than one large burst, thereby reducing the MAP size required to describe each individual burst while maintaining efficient resource utilization.
2Device complexity
If multiple PDU[CID]s are concatenated to generate one burst, then resource allocation is simplified, but terminal decoding becomes impossible when burst size exceeds maximum limit
Solution Approach 1:
The invention introduces dynamic burst size adjustment through fragmentation. The system dynamically determines the optimal burst size by comparing the concatenated PDU[CID] size against the terminal's maximum decodable burst size. When the concatenated size exceeds the limit, the system dynamically fragments the data into multiple smaller bursts, ensuring each burst remains within the terminal's decoding capability while adapting to different terminal requirements.
3Ease of manufacture
If bursts are generated without considering terminal decoding capability, then allocation process is simpler, but data transmission reliability decreases
Solution Approach 1:
The invention applies preliminary action by performing a pre-check of terminal decoding capability before generating bursts. The base station obtains the maximum burst size that the terminal can decode and uses this information to guide the burst generation process. This preliminary assessment ensures that bursts are generated with appropriate size constraints from the outset, maintaining both simplicity and reliability.
Data Source
AI summary
A method for generating a burst in a communication system. The method includes estimating a first allocable PDU according to scheduling priority; generating a first burst in which the first PDU is to be included; and determining whether a total size of bursts to be allocated to a downlink subframe including the generated first burst is less than a maximum size of bursts allocable to the downlink subframe.