Wireless Terminal Uplink Synchronization and Resource Allocation
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Solution Overview
Problem
Current wireless communication technologies face inefficiencies in data transmission bandwidth, particularly in high-density environments where multiple devices need to share channels efficiently, leading to reduced data transmission speeds and increased latency.
Innovation Solution
A wireless communication method and terminal that utilize a transceiver and processor to manage resource allocation and channel state information, allowing multiple terminals to transmit data simultaneously by using orthogonal codes and synchronized frames, ensuring efficient channel usage and minimizing collisions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple terminals share channels in high-density environments using conventional wireless communication technologies, then channel utilization is improved, but data transmission efficiency deteriorates due to collisions and interference
Solution Approach 1:
The patent segments the channel access process into distinct phases: uplink synchronization phase where terminals transmit synchronization signals, and data transmission phase where actual data is sent. This segmentation prevents collisions by ensuring terminals are synchronized before data transmission begins, resolving the contradiction between channel sharing and transmission efficiency
Solution Approach 2:
The patent implements preliminary uplink synchronization before data transmission. Terminals first transmit synchronization signals and receive timing adjustment information from the base station, ensuring they are properly synchronized. This preliminary action prevents collisions during subsequent data transmission, improving efficiency while allowing multiple terminals to share the channel
2Speed
If bandwidth is expanded to increase data transmission capacity, then data transmission speed is improved, but resource allocation complexity increases
Solution Approach 1:
The patent changes the bandwidth parameter dynamically by configuring different subcarrier spacings based on the uplink transmission type. For random access preamble transmission, a first subcarrier spacing is used, while for data transmission, a second subcarrier spacing is applied. This parameter change enables bandwidth expansion for higher speeds while managing complexity through standardized configurations
Solution Approach 2:
The patent creates a universal resource allocation framework that handles multiple transmission types (random access, scheduled uplink) through a unified procedure. The base station sends a single uplink grant containing resource allocation information that works for both preamble transmission and data transmission, reducing allocation complexity while supporting expanded bandwidth for high-speed transmission
3Productivity
If synchronized uplink transmission is implemented to reduce collisions, then channel utilization is improved, but transmission flexibility is reduced
Solution Approach 1:
The patent implements dynamic resource allocation where the base station sends uplink grants that can be adapted to different terminal requirements. While synchronization is enforced for collision avoidance, the resource allocation parameters (time resources, frequency resources, subcarrier spacing) are dynamically adjusted based on individual terminal needs and channel conditions, maintaining flexibility within the synchronized framework
Data Source
AI summary
Provided is a wireless communication terminal including a transceiver for transmitting/receiving a wireless signal and a processor for controlling an operation of the wireless communication terminal. The transceiver receives a first frame indicating information on a resource that a base wireless communication terminal allocates to a plurality of wireless communication terminals from the base wireless communication terminal, and transmits data to the base wireless communication terminal based on the first frame. The plurality of wireless communication terminals include the wireless communication terminal.