Grant-Free Resource Configuration for Wireless Retransmissions
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Solution Overview
Problem
The grant-free transmission mode in communications systems faces inefficiencies due to preconfigured resources, leading to resource waste when few devices transmit and severe collisions when many devices transmit, resulting in reduced performance.
Innovation Solution
The system dynamically adjusts resource configuration based on receiving status, allowing terminal devices to select resources and the network device to configure additional resources for retransmissions, improving flexibility and reducing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If preconfigured grant-free resources are allocated to terminal devices, then transmission latency is reduced and signaling overheads are reduced, but resource waste occurs when few devices transmit and severe collisions occur when many devices transmit
Solution Approach 1:
The patent applies dynamics by transitioning from static preconfigured resources to dynamic resource allocation. The network device dynamically determines and notifies terminal devices of available grant-free resources based on actual transmission needs, allowing resources to be allocated or released according to real-time conditions rather than fixed in advance.
Solution Approach 2:
The patent implements feedback mechanisms where terminal devices send first indication information to notify the network device of their data transmission needs, and the network device responds with second indication information about available resources. This bidirectional feedback loop enables adaptive resource allocation that prevents both waste and collisions.
2Adaptability or versatility
If preconfigured grant-free resources are allocated without knowing terminal device transmission actions in advance, then transmission flexibility is improved, but the network device cannot determine resource size leading to waste or collision
Solution Approach 1:
The patent applies preliminary action by having terminal devices send first indication information before actual data transmission to notify the network device of their intentions. This advance notification allows the network device to prepare and allocate appropriate resources in advance, ensuring both flexibility and reliability.
Solution Approach 2:
The network device uses feedback through second indication information to confirm resource allocation to terminal devices. This feedback mechanism ensures that resources are allocated reliably based on actual transmission needs while maintaining the flexibility of grant-free operation.
Data Source
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AI summary
Embodiments of this application provide an information transmission method and apparatus. The method includes: determining, by a network device, first indication information, where the first indication information is used to indicate a configuration of a second resource, the second resource is used to transmit retransmission data including retransmission data of first data, the first data is data sent by a first terminal device by using a first resource unit, the first resource unit belongs to a preconfigured first resource, the first resource and the second resource are both grant-free resources and are different from each other, and the first indication information is determined by the network device based on a receiving status of the first data; and sending, by the network device, the first indication information. Therefore, resource configuration flexibility can be improved.