Downlink Channel Merging Downlink Uplink Scheduling Information
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Solution Overview
Problem
In wireless communications, particularly in UMTS, the overheads of channels are significant due to the need for separate downlink and uplink scheduling information channels, which increases data transmission time and resource utilization.
Innovation Solution
A method where a terminal device receives a single downlink channel carrying both downlink and uplink scheduling information, allowing for simultaneous data transmission without the need for separate channels for each, thereby reducing overheads and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate downlink and uplink scheduling channels are used, then scheduling information can be transmitted reliably, but channel overheads increase significantly
Solution Approach 1:
The patent combines downlink scheduling information and uplink scheduling information into a single downlink channel (PDCCH), eliminating the need for separate uplink scheduling channels. This merging reduces channel overhead while maintaining reliable transmission of both types of scheduling information through unified resource allocation mechanisms.
Solution Approach 2:
The downlink control channel is designed to serve multiple functions simultaneously: it carries both downlink scheduling assignments and uplink scheduling grants. This multi-functionality allows a single channel structure to replace what would traditionally require separate dedicated channels for each scheduling type, thereby reducing overall overhead.
2Reliability
If separate downlink and uplink scheduling channels are used, then scheduling information can be transmitted reliably, but data transmission time increases
Solution Approach 1:
By merging downlink and uplink scheduling information into a single downlink channel, the terminal device can receive both types of scheduling information simultaneously in one reception operation. This eliminates the sequential processing time that would be required if separate channels were used, thereby reducing overall data transmission time while maintaining reliable scheduling.
3Reliability
If separate downlink and uplink scheduling channels are used, then scheduling information can be transmitted reliably, but resource utilization decreases
Solution Approach 1:
The patent merges the functionality of separate downlink and uplink scheduling channels into a single downlink channel structure. This consolidation reduces the total number of physical resources dedicated to control information transmission, thereby increasing the availability of resources for data transmission and improving overall resource utilization while maintaining reliable scheduling through unified control mechanisms.
Data Source
AI summary
Provided are an information transmission method, a terminal device and a network device. The information transmission method includes that: a terminal device receives a downlink channel sent from a first network device, the downlink channel carrying downlink scheduling information and uplink scheduling information of the terminal device; and the terminal device performs, according to the downlink channel, data transmission with the first network device. By means of the information transmission method, the terminal device and the network device provided in the embodiments of the present application, overheads of a channel can be saved, thereby saving data transmission time.