Wireless Communication Resource Reallocation Indication
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Solution Overview
Problem
In wireless communication systems, particularly in LTE, reallocating time-frequency resources to meet high delay requirements causes performance loss for terminal devices with low delay requirements, as they must demodulate or decode data on reallocated resources.
Innovation Solution
A method where a network device sends posterior resource indication information to terminal devices, allowing them to determine if their allocated time-frequency resources have been reallocated, enabling them to skip receiving data on reallocated resources and thus reducing performance loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If time-frequency resources are reallocated to meet high delay requirements, then the delay requirement is satisfied, but terminal devices with low delay requirements suffer performance loss
Solution Approach 1:
The patent extracts the reallocated resources from the terminal device's received resources by sending indication information to the terminal device. The terminal device then skips demodulation and decoding of data on these extracted reallocated resources, avoiding performance loss while allowing the network device to use these resources for high delay requirement services.
Solution Approach 2:
The patent introduces indication information as an intermediary between the network device and terminal device. This indication information carries resource allocation information that enables the terminal device to identify and skip reallocated resources, thereby resolving the conflict between resource reallocation and terminal device performance.
2Productivity
If time-frequency resources are reallocated from terminal devices to meet high delay requirements, then resource utilization improves, but the terminal device must still process reallocated resources causing complexity
Solution Approach 1:
The patent applies preliminary action by sending indication information to the terminal device before the terminal device processes downlink data. This indication information预先 informs the terminal device which resources are reallocated, allowing the terminal device to skip processing these resources in advance, thereby reducing processing complexity while maintaining high resource utilization.
3Adaptability or versatility
If the network device reallocates resources dynamically, then service flexibility improves, but the terminal device cannot correctly receive data on reallocated resources
Solution Approach 1:
The patent implements feedback by sending indication information from the network device to the terminal device regarding resource allocation changes. This feedback mechanism enables the terminal device to adapt to dynamic resource reallocation while maintaining correct data reception by skipping processing of reallocated resources identified through the feedback information.
Data Source
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AI summary
Embodiments of this application disclose a wireless communication method, a network device, and a terminal device, to reduce receiving performance loss of a terminal device that is caused by resource reallocation. The method includes: sending, by the network device, a physical downlink control channel, where the PDCCH indicates one or more time-frequency resources scheduled by the network device; reallocating, by the network device, at least one of the time-frequency resource; and sending, by the network device, at least one piece of posterior resource indication information, where the at least one piece of posterior resource indication information indicates the reallocated time-frequency resource in the time-frequency resources.