Wireless Terminal Backoff Time Selection for Collision Avoidance
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Solution Overview
Problem
Current mobile communication systems face challenges in accommodating explosive data traffic, high transmission rates, increased device connectivity, low latency, and energy efficiency, particularly in scenarios where terminals are not connected to network nodes, leading to resource allocation inefficiencies and potential data transmission collisions.
Innovation Solution
A method and apparatus for differentially setting backoff times for data transmission in wireless communication systems, allowing terminals to transmit and receive data without a direct connection to network nodes by selecting random backoff times based on system information that includes minimum and maximum backoff times, which are adjusted according to data characteristics and transmission directions, thereby avoiding collisions and optimizing resource allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If terminals transmit data without establishing a connection to network nodes, then data transmission latency is reduced and resource allocation efficiency is improved, but data transmission collisions occur and transmission reliability deteriorates
Solution Approach 1:
The network node performs preliminary actions by determining and configuring different backoff times for different terminals based on their connection purposes and data characteristics before the actual data transmission occurs. This preliminary configuration allows terminals to access the channel without establishing full connections first, reducing latency while preventing collisions through pre-planned timing differences.
Solution Approach 2:
The system dynamically adjusts backoff times based on real-time conditions including terminal connection purposes, data characteristics, and network load. The backoff time is not fixed but adapts dynamically to prevent collisions and optimize resource allocation, allowing the system to maintain reliability while achieving low latency for different types of data transmissions.
2Ease of operation
If backoff times are set uniformly for all terminals, then system operation is simplified, but resource allocation efficiency deteriorates and transmission collisions increase
Solution Approach 1:
The system applies local quality by assigning different backoff times to different terminals based on their specific connection purposes and data characteristics. Instead of uniform treatment, each terminal receives customized backoff parameters that optimize resource allocation for their specific needs, whether for uplink data transmission, downlink reception, or other purposes.
Solution Approach 2:
The system changes the backoff time parameter dynamically based on terminal characteristics and connection purposes. By adjusting this critical parameter according to data characteristics and transmission direction, the system achieves efficient resource allocation without complex configuration operations, as the adjustments are made automatically based on predefined criteria.
3Reliability
If connection establishment is required before data transmission, then transmission reliability is improved, but data transmission latency increases and resource allocation efficiency deteriorates
Solution Approach 1:
The network node performs preliminary determination of backoff times based on connection purpose and data characteristics before actual data transmission begins. This preliminary action allows the system to prepare timing configurations in advance, enabling reliable data transmission without requiring full connection establishment procedures to be completed first, thus reducing latency.
Solution Approach 2:
The backoff time mechanism acts as an intermediary that mediates between connection establishment requirements and data transmission needs. By using backoff time as an intermediate control parameter, the system can manage access to the communication channel in a way that ensures reliability while eliminating the need for explicit connection establishment before data transmission.
4Device complexity
If random access is performed without differentiated backoff times, then device complexity is reduced, but transmission collisions increase and productivity deteriorates
Solution Approach 1:
The system introduces local quality differentiation by assigning specific backoff times to specific terminals based on their connection purposes and data characteristics. This localized customization prevents collisions between different types of transmissions while maintaining the simplicity of the random access mechanism, as each terminal simply follows its assigned backoff time without complex coordination.
Data Source
AI summary
The present invention relates to a method and an apparatus for transmitting and receiving, by a terminal, data in a wireless communication system. The present invention may provide a method and an apparatus which receive, from a base station, a system information block comprising backoff information for an arbitrary connection procedure; select an arbitrary backoff time between a first minimum backoff time and a first maximum backoff time; transmit, to the base station, a preamble for any connection after the selected arbitrary backoff time has elapsed; receive a response message comprising resource information for transmitting data, in response to the preamble; and transmit, to the base station, the data on the basis of the resource information.