Bitmap-Based Time-Domain Resource Allocation in Wireless Systems
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Solution Overview
Problem
Current wireless communication systems, such as LTE, face limitations in time-domain scheduling flexibility and resource allocation delay, leading to inefficient resource allocation and high fragmentation rates, particularly in systems like LTE and future 5G networks.
Innovation Solution
A method using bitmaps to indicate time-domain resources allocated for terminal devices within frequency-domain resource units, allowing for flexible configuration of time-domain starting points and lengths, enabling the allocation of both continuous and discontinuous time-domain resources, thereby improving scheduling flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If slot and subframe are used as time-domain units for scheduling, then the scheduling structure is simple and stable, but the time-domain flexibility is low and resource allocation delay is long
Solution Approach 1:
The patent divides the time-domain resource into smaller units (symbols) rather than using larger units (slots and subframes) for scheduling. By segmenting the time domain at the symbol level, the system achieves finer-grained resource allocation, enabling more flexible scheduling decisions and reducing the delay between resource request and allocation while maintaining structural simplicity through the bitmap indication mechanism.
2Adaptability or versatility
If slot and subframe are used as time-domain units for scheduling, then the scheduling structure is simple and stable, but the resource fragmentation rate is high
Solution Approach 1:
The patent introduces dynamic resource allocation at the symbol level within slots, allowing the network to flexibly adjust resource distribution based on real-time traffic conditions. The bitmap indication mechanism enables dynamic configuration of which symbols within a slot are allocated to which users, transforming the static slot-based scheduling into a dynamic symbol-level scheduling that adapts to changing network conditions and reduces resource fragmentation.
3Adaptability or versatility
If bitmap is used to indicate time-domain resources, then the scheduling flexibility is improved, but the control information complexity increases
Solution Approach 1:
The patent uses a bitmap structure where each bit corresponds to a specific symbol within a slot, creating a simplified representation of time-domain resource allocation. This bitmap copying approach translates complex scheduling decisions into a compact binary format that is easy to transmit and process, reducing control information complexity while maintaining the flexibility of symbol-level scheduling. The standardized bitmap format allows for efficient processing by both transmitter and receiver.
Data Source
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AI summary
Disclosed by the embodiments of the present application are a wireless communication method, a terminal device and a network device, the method comprising: a terminal device receives a first bit map sent by a network device, the first bit map being used for indicating time-domain resources allocated by the network device to the terminal device in a first frequency-domain resource unit; and the terminal device carries out data transmission with the network device on the time-domain resources indicated by the first bit map. The method, terminal device and network device according to the embodiments of the present application may improve the flexibility of time domain scheduling.