On-Demand System Message Request via Preconfigured Uplink Resources
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Solution Overview
Problem
Existing communication systems face challenges in network energy efficiency, particularly in idle states, leading to high operational expenditures and environmental impact, with solutions like discontinuing SSB and SIB1 transmission not fully addressing the need for efficient resource allocation and message transmission.
Innovation Solution
A method for wireless communication involving a terminal device determining and transmitting a first uplink channel/signal to request a first system message, such as SSB or SIB1, and a network device detecting this signal to facilitate efficient transmission only when needed, thereby optimizing energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the network device does not transmit the first system message when the network is in an idle state, then energy consumption is reduced, but the terminal device cannot obtain system information when needed
Solution Approach 1:
The network device pre-configures uplink resources for terminal devices before the network enters idle state. When the network transitions to idle state, these pre-configured resources remain available, allowing terminal devices to immediately request system messages without waiting for resource allocation, thus maintaining information availability while enabling energy savings during idle periods
Solution Approach 2:
Terminal devices autonomously determine whether to request system messages by monitoring their own needs and using pre-configured uplink resources to send requests when necessary. This self-service mechanism eliminates the need for continuous network broadcasting of system messages, reducing network energy consumption while ensuring information is available when terminal devices actually need it
2Loss of information
If the network device continuously transmits the first system message, then the terminal device can always obtain system information, but energy consumption increases
Solution Approach 1:
Instead of continuous transmission, the network device transmits system messages periodically or on-demand based on terminal device requests. The semi-persistent scheduling mechanism allows the network to allocate uplink resources periodically, and terminal devices can request system messages at these scheduled intervals, reducing overall transmission energy while maintaining information availability
Solution Approach 2:
The system implements feedback mechanisms where terminal devices indicate their information needs through uplink requests, and the network device responds by transmitting system messages only when requests are received. This feedback-driven approach ensures system information is available when needed while avoiding unnecessary transmissions during periods when no terminal devices require the information, significantly reducing energy consumption
3Productivity
If the network device allocates uplink resources for requesting system messages, then terminal devices can request messages efficiently, but resource allocation complexity increases
Solution Approach 1:
The uplink resources configured for requesting system messages are designed to serve multiple functions: they can be used for random access procedures, for requesting system messages, and for other uplink transmissions. This multi-functionality reduces the need for dedicated resources solely for message requests, simplifying the overall resource allocation scheme while maintaining efficient message request capability
Solution Approach 2:
The network device performs preliminary configuration of uplink resources in advance, before terminal devices need to request system messages. This pre-configuration includes setting up semi-persistent scheduling parameters and resource allocations that remain valid during idle states. By doing the allocation work beforehand, the actual message request process becomes simple and efficient, while the complexity is managed in advance during network configuration phases
Data Source
AI summary
The present application provides a wireless communication method, a terminal device, and a network device. The method includes: a terminal device determines a first uplink resource in a first cell; and the terminal device sends a first uplink channel/signal by means of the first uplink resource, the first uplink channel/signal being used for requesting to send a first system message.