Uplink Signal Sequence Generation for Multi-Cell Radio Resource Collision Avoidance
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Solution Overview
Problem
In wireless communication systems, especially in multi-node cooperative communication schemes, there is a challenge in efficiently transmitting and receiving uplink/downlink signals between cells with different identities, leading to potential radio resource collisions and reduced communication efficiency.
Innovation Solution
A method involving the reception of slot number and identifier information from a first cell to a second cell, allowing for the generation and transmission of optimized sequences for uplink signals, and the use of pseudo-random sequences for resource allocation and demodulation, ensuring effective signal transmission and reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multi-node cooperative communication is implemented, then data throughput and communication performance are improved, but radio resource collisions occur between different cells
Solution Approach 1:
The patent segments the radio resource allocation by introducing cell-specific parameters (cell ID, slot number) that divide the resource space into distinct segments for different cells. This segmentation prevents resource collisions by ensuring each cell operates in its designated resource segment.
Solution Approach 2:
The patent applies local quality by making the sequence generation characteristics cell-specific and time-specific. Different cells use different cell IDs and slot numbers in the sequence generation formula, creating locally optimized resource allocations that prevent interference while maintaining overall system throughput.
2Adaptability or versatility
If cells use different identities for uplink and downlink, then communication flexibility is improved, but sequence generation complexity increases
Solution Approach 1:
The patent achieves universality by using a single sequence generation formula that works for both uplink and downlink communications. The formula r(n)=exp(jπn(n+1)/89) is universally applied across different cell identities and time slots, simplifying implementation while maintaining flexibility.
Solution Approach 2:
The patent manages complexity by changing parameters (cell ID, slot number) within the same formula structure rather than using different formulas. This parameter-based approach allows flexible communication while keeping the generation mechanism simple and unified.
3Productivity
If pseudo-random sequences are used for resource allocation, then resource utilization efficiency is improved, but interference management becomes more difficult
Solution Approach 1:
The patent controls interference by systematically changing parameters (cell ID, slot number) in the pseudo-random sequence generation. This parameter variation ensures that sequences from different cells and time slots are sufficiently different, reducing interference while maintaining high resource utilization.
Solution Approach 2:
The patent implements feedback mechanisms where the receiver provides information about received sequences and channel conditions, allowing the transmitter to adjust sequence generation parameters to minimize interference while maintaining efficient resource allocation.
Data Source
AI summary
A method for transmitting an uplink signal in a wireless communication system according to one embodiment of the present invention comprises: receiving, from a first cell, information on a slot number of a radio frame of a second cell and identifier information that includes a virtual identifier or an identifier of the second cell; and generating a sequence for an uplink signal on the basis of the information on the slot number and the identifier information; and transmitting the generated sequence to the second cell.