Wireless Communication Contention-Based Access Conflict Resolution
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In next-generation wireless communication networks, the contention-based access mechanism for massive user access leads to significant signaling overhead and transmission latency, as well as conflicts when multiple terminal devices transmit data on the same resource simultaneously.
Innovation Solution
A wireless communication method where terminal devices transmit a sounding signal to contend for a pre-allocated resource, and upon receiving a feedback signal indicating successful contention, they transmit uplink data on that resource, thereby avoiding conflicts by using pre-allocated resources efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If contention-based access is adopted to support massive user access, then user access capacity is improved, but resource conflicts occur when multiple terminal devices transmit data on the same resource simultaneously
Solution Approach 1:
The network device pre-allocates uplink transmission resources to terminal devices before actual data transmission. This preliminary resource allocation avoids the need for terminal devices to contend for resources during data transmission, thereby eliminating resource conflicts while supporting massive user access. The pre-allocated resources are reserved for terminal devices that have successful contention results.
2Reliability
If scheduling/grant mechanism is used under full control of base station, then resource allocation reliability is improved, but signaling overhead and scheduling pressure increase significantly
Solution Approach 1:
Terminal devices autonomously select uplink transmission resources from pre-allocated resources based on their own data transmission needs without requiring base station scheduling for each transmission. This self-service mechanism reduces signaling overhead and scheduling pressure on the base station while maintaining reliable resource allocation through the pre-allocation framework.
3Device complexity
If contention-based access is used, then signaling overhead is reduced, but transmission latency increases due to resource conflicts
Solution Approach 1:
By pre-allocating resources before data transmission, the system eliminates the need for terminal devices to wait for resource contention resolution during data transmission. This preliminary action ensures that terminal devices can immediately transmit data on their assigned resources without latency caused by conflicts, while still maintaining low signaling overhead through the contention-based access framework.
Data Source
AI summary
Embodiments of the present application provide a wireless communication method, a terminal device and a network device capable of implementing contention-based access while avoiding conflicts. The method includes: transmitting, by a terminal device, a sounding signal to a network device when there is uplink data to be transmitted, where the sounding signal is used for contending for a first pre-allocated resource; and transmitting, by the terminal device, the uplink data to be transmitted on the first pre-allocated resource, when receiving a first feedback signal sent by the network device in response to the sounding signal, where the first feedback signal is used for indicate that the terminal device has a successful contention for the first pre-allocated resource.