Relay Node Data Aggregation for Signalling Overhead Reduction
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Solution Overview
Problem
Current wireless telecommunications systems using relay nodes face inefficiencies in handling communications, particularly in reducing signalling overhead when supporting terminal devices with limited uplink power or located in areas with high penetration loss, such as smart meters, which require effective resource utilization and coverage extension.
Innovation Solution
A method and apparatus where a relay device receives data blocks from terminal devices with associated transmission timing indications, buffers them, and transmits them collectively before the earliest required time, optimizing signalling and resource utilization by aggregating data and reducing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If relay nodes transmit data blocks individually as they receive them from terminal devices, then data transmission timeliness is improved, but signalling overhead increases
Solution Approach 1:
The relay node combines multiple data blocks received from different terminal devices into a single aggregated transmission to the donor base station. This merging approach reduces the number of separate signalling messages required, thereby reducing signalling overhead while maintaining timely data delivery through efficient resource utilization.
Solution Approach 2:
The relay node performs preliminary buffering and aggregation of data blocks before transmission to the donor base station. By preparing data in advance and grouping them for collective transmission, the system reduces the frequency of signalling exchanges while ensuring data is ready for timely delivery when transmission opportunities arise.
2Loss of information
If relay nodes aggregate and buffer multiple data blocks before transmission, then signalling overhead is reduced, but data transmission delay increases
Solution Approach 1:
The relay node applies partial buffering by maintaining data blocks for aggregation only up to a certain point, rather than indefinite buffering. This partial action approach allows sufficient time for data aggregation to reduce signalling overhead, while imposing constraints to prevent excessive delays, thus balancing both requirements.
Solution Approach 2:
The relay node dynamically adjusts its buffering and aggregation behavior based on current network conditions, data arrival patterns, and timing requirements. This dynamic approach allows the system to optimize between aggregation benefits and delay constraints in real-time, transmitting aggregated blocks when beneficial and individual blocks when timeliness is critical.
3Area of stationary object
If relay nodes support terminal devices with limited uplink power through direct transmission, then coverage is maintained, but resource utilization efficiency decreases
Solution Approach 1:
The relay node acts as an intermediary between terminal devices with limited uplink power and the donor base station. By receiving data from terminal devices at lower power requirements and then transmitting aggregated data to the base station, the relay extends coverage to areas that would otherwise be unreachable while improving overall resource utilization through efficient aggregation and reduced signalling overhead.
Data Source
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AI summary
A method of operating a relay device to receive data from one or more terminal devices and relay the data to a base station in a wireless telecommunications system. The method comprising receiving a plurality of blocks of data from one or more terminal devices at different times. Each block of data is received in association with an indication of a time by which the block of data should be transmitted to the base station. The block of data are buffered at the relay node. The relay node determines the earliest time by which one of the received blocks of data should be transmitted to the base station and transmits the plurality of blocks of data to the base station together in advance of this earliest time. This can help to reduce signalling overhead associated with transmissions from the relay device to the base station whilst helping to ensure data is not delayed at the relay node for longer than is acceptable for the data.