Wireless Communication Device Non-Transmission Region Guard Interval
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Solution Overview
Problem
MTC terminals experience increased errors in internal oscillator synchronization and frame synchronization due to prolonged periods of inactivity, leading to decreased accuracy in uplink and downlink communications, and high power consumption during burst transmissions.
Innovation Solution
A wireless communication device and method that sets a non-transmission region at the boundary with adjacent resource blocks in the time or frequency direction, uses a longer guard interval for OFDM symbols, and transmits a reference signal at the head of the resource block to reduce interference and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If MTC terminal performs burst transmission and reception in very long period intervals to reduce power consumption, then power consumption is reduced, but errors in internal oscillator synchronization and frame synchronization increase
Solution Approach 1:
The patent applies preliminary action by performing synchronization processing immediately before burst transmission and reception operations. The terminal acquires timing advance values and performs frame synchronization right before the burst communication occurs, ensuring that synchronization is fresh and accurate when needed, rather than relying on outdated synchronization from previous operations hours or days ago.
Solution Approach 2:
The patent implements periodic action by having the terminal perform synchronization processing at regular intervals appropriate for MTC burst communication patterns. The terminal periodically updates its timing advance value and frame synchronization before each burst transmission or reception event, adapting the periodicity to the specific MTC application requirements while maintaining synchronization accuracy.
2Reliability
If MTC terminal increases transmission power for burst communications to overcome synchronization errors, then communication reliability improves, but power consumption increases
Solution Approach 1:
The patent applies feedback by having the base station measure the uplink reception timing of burst transmissions and calculate timing advance values based on these measurements. The base station feeds back the timing advance value to the terminal, which then uses this feedback to adjust its transmission timing for subsequent bursts, creating a closed-loop system that progressively improves synchronization accuracy without increasing power consumption.
Solution Approach 2:
The patent uses preliminary action by having the terminal perform timing advance adjustment and synchronization processing before each burst transmission. This preliminary synchronization ensures that when the terminal transmits during the burst, its timing is already optimized, eliminating the need to increase transmission power to compensate for timing errors.
3Measurement precision
If MTC terminal performs frequent synchronization to maintain accuracy, then synchronization precision is improved, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the synchronization frequency adaptive rather than fixed. The terminal performs synchronization processing at different intervals based on its operational state - more frequently when active and communicating, and less frequently when in idle mode between bursts. This dynamic approach maintains synchronization accuracy when needed while minimizing power consumption during idle periods.
Solution Approach 2:
The patent implements periodic action with variable periods, where the terminal performs frame synchronization at regular intervals that are adapted to MTC burst communication patterns. Rather than continuous synchronization, the terminal uses periodic synchronization with periods tailored to the specific MTC application requirements, balancing accuracy maintenance with power savings.
Data Source
AI summary
Provided is a wireless communication device including, in a resource block assigned from among a plurality of resource blocks arranged in a grid pattern on a time axis and a frequency axis, a wireless communication unit for not performing transmission in a non-transmission region and for performing transmission in another region in the source block, the non-transmission region being set at a boundary with an adjacent resource block in a time direction or a frequency direction.