Wireless Terminal Interference Removal via Structural Identifier Allocation
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Solution Overview
Problem
In wireless communication systems, terminals at cell borders face challenges in efficiently obtaining identifiers from neighboring base stations to decode control information, leading to increased overhead and high decoding failure probabilities, especially when performing blind detection.
Innovation Solution
The method involves structurally allocating identifiers according to predefined rules, allowing terminals to receive compressed interference information, which includes start and end indices or differences, to efficiently determine candidate identifiers for decoding control information and reduce decoding errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals perform blind detection on all identifiers to decode control information from neighboring base stations, then the ability to remove interference is improved, but the decoding failure probability increases and power consumption increases
Solution Approach 1:
The patent applies preliminary action by having the serving base station pre-process and provide identifier information of neighboring base station terminals through broadcast or dedicated signaling. This allows the terminal to obtain a reduced set of candidate identifiers before attempting to decode control information, avoiding the need to try all possible identifiers and thereby reducing decoding failures while maintaining interference removal capability
Solution Approach 2:
The patent uses the serving base station as an intermediary to transfer identifier information from the neighboring base station to the terminal. Instead of the terminal directly performing blind detection on all identifiers, the serving base station acts as a mediator that provides a filtered set of relevant identifiers, reducing the search space and improving decoding success rate
2Reliability
If terminals obtain identifier information through broadcasting channel of neighboring base station, then interference removal capability is improved, but overhead increases
Solution Approach 1:
The patent extracts only the necessary identifier information from the neighboring base station's terminal set and provides it to the terminal through the serving base station. Instead of transmitting complete identifier lists or requiring the terminal to process all identifiers, only the relevant candidate identifiers are extracted and transmitted, reducing overhead while maintaining the ability to remove interference
Solution Approach 2:
The serving base station performs preliminary processing to identify and provide only the relevant candidate identifiers before the terminal attempts decoding. This pre-filtering of identifier information reduces the amount of data that needs to be transmitted and processed, thereby reducing overhead while maintaining interference removal effectiveness
Data Source
AI summary
A method for operating a terminal in a wireless communication system is provided. The method includes receiving control information masked with an identifier allocated according to a predefined rule for structural allocation, the control information being transmitted from a neighboring base station, and processing the control information by using the identifier.