Uplink Signal Processing Resolving Random Access Channel Interference
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Solution Overview
Problem
In the LTE system, the overlap between the uplink channel quality sounding pilot and the random access channel within an uplink pilot timeslot due to frequency hopping can interfere with the detection performance of the random access channel, particularly when only the short random access burst structure 4 is available, leading to complications in multiplexing configurations.
Innovation Solution
A method and apparatus where a user equipment (UE) determines if there is a conflict between the random access channel and the uplink channel quality sounding pilot within an uplink pilot timeslot and, if so, avoids transmitting the uplink channel quality sounding pilot during that timeslot to prevent interference, allowing transmission in a subsequent timeslot when no conflict exists.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the uplink channel quality sounding pilot is transmitted in the uplink pilot timeslot due to frequency hopping, then the channel quality measurement is improved, but the detection performance of the random access channel deteriorates due to interference
Solution Approach 1:
The patent extracts the harmful element (uplink channel quality sounding pilot) from the conflicting time-frequency resource when it would interfere with random access channel detection. The UE determines whether the sounding pilot and random access channel overlap in the uplink pilot timeslot, and if so, the UE does not transmit the sounding pilot in that specific instance, thereby removing the interference source while preserving the overall functionality of both features
Solution Approach 2:
The patent introduces dynamic behavior where the UE adaptively adjusts its transmission decisions based on real-time conditions. The UE dynamically determines whether to transmit the uplink channel quality sounding pilot in each uplink pilot timeslot by checking for conflicts with random access channel resources, making the system flexible rather than static in handling the interference problem
2Loss of time
If the short random access burst structure 4 is used in the uplink pilot timeslot, then the time resource is saved, but the multiplexing configuration becomes complicated due to overlap with sounding pilot
Solution Approach 1:
The UE autonomously determines and resolves the conflict between random access channel and sounding pilot without requiring complex network-side multiplexing configuration. The UE itself performs the decision-making process by checking for overlaps and adjusting its transmission accordingly, simplifying the overall system configuration while maintaining time resource efficiency
Data Source
AI summary
The present invention discloses a method for processing uplink signal. In this method, when a random access channel of a cell where a user equipment (UE) locates is within an uplink pilot timeslot, the UE determining whether there is a conflict between the random access channel and time-frequency position of an uplink channel quality sounding pilot of the UE; and if there is a conflict, the uplink channel quality sounding pilot will not be transmitted by the UE within the uplink pilot timeslot. The present invention also discloses a system and apparatus for processing uplink signal. By applying the method, system and apparatus of the present invention, the interference to detection performance of the random access channel caused by the uplink channel quality sounding pilot will be avoided, thereby increasing the detection performance of the random access channel.