Terminal Timing Adjustment for Direct Communication
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Solution Overview
Problem
Existing methods for establishing a direct link between terminals in wireless communication systems disrupt existing services with a base station, as they require resource allocation that affects communication between the base station and terminals, leading to inefficiencies and service interruptions.
Innovation Solution
A method that determines and adjusts timing for signal transmission between terminals and a base station to enable efficient device discovery and direct communication, allowing for continuous service without interfering with existing base station-terminal communication, by changing either the timing for transmitting or receiving signals when they overlap, and using specific timing change information from the base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If resources are allocated for device discovery operations to establish direct links between terminals, then direct communication capability is improved, but existing communication services between base station and terminals are disrupted
Solution Approach 1:
The patent segments communication resources by creating separate resource pools: one for base station-terminal communication and another for device discovery operations. This segmentation allows both functions to operate independently without interfering with each other, resolving the contradiction between enabling direct communication and maintaining service continuity.
Solution Approach 2:
The base station acts as an intermediary that coordinates resource allocation between device discovery operations and existing communication services. It manages the scheduling and timing of discovery signals while preserving resources for ongoing communications, thus mediating between the two competing requirements.
2Productivity
If device discovery operations are performed using base station resources, then terminal discovery efficiency is improved, but resource availability for lower-level terminals is reduced
Solution Approach 1:
The patent divides available resources into distinct segments: dedicated discovery resources and communication resources. This ensures that device discovery operations can proceed efficiently using allocated discovery resources without consuming resources needed for lower-level terminal communications.
Solution Approach 2:
The system allocates only the necessary portion of resources for device discovery operations, rather than using all available resources. This partial allocation approach maintains sufficient resources for ongoing communications while enabling discovery functionality.
3Reliability
If timing for signal transmission is adjusted to avoid overlap, then communication reliability is improved, but timing flexibility is reduced
Solution Approach 1:
The patent implements dynamic timing adjustment mechanisms where transmission timing can be flexibly modified based on current system conditions. The base station can dynamically schedule discovery operations at appropriate times without fixed constraints, maintaining both reliability through non-overlapping transmissions and flexibility through adaptive timing decisions.
Data Source
AI summary
A method for a first terminal communicating with a base station to perform direct communication with a second terminal is provided. The first terminal determines first timing for transmitting or receiving a first signal to or from the base station. Next, the first terminal determines second timing for transmitting a second signal for terminal discovery to the second terminal. When the first timing and the second timing overlap, the first terminal then changes either the first timing or the second timing.