OFDMA Segment Power Coordination for Uplink Interference
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Solution Overview
Problem
Existing OFDMA systems face challenges with uplink interference, limited scalability, and inability to facilitate multi-base station MBS communication and Macro Diversity Handover (MDHO), leading to suboptimal communication efficiency and potential transmission interruptions.
Innovation Solution
The system coordinates uplink transmission by designating a single segment as high power for overlapping areas and using other segments at low power for non-overlapping areas, enabling multi-base station MBS communication and MDHO through strategic power management and sector division to minimize interference and enhance scalability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple base stations use the same segment at high power level for MBS communication in overlapping areas, then communication efficiency and signal strength are improved, but uplink interference with non-overlapping areas increases
Solution Approach 1:
The frequency spectrum is divided into multiple segments, allowing different base stations to use different segments simultaneously. Base stations in overlapping areas can use the same segment for MBS communication while base stations in non-overlapping areas use other segments, thereby reducing uplink interference while maintaining communication efficiency.
Solution Approach 2:
Different power levels are applied to different segments based on local requirements. The segment used by base stations in overlapping areas for MBS communication operates at high power level, while other segments used by base stations in non-overlapping areas operate at low power level, thus reducing interference in non-overlapping areas while maintaining signal strength in overlapping areas.
2Strength
If a single segment is used for all base stations in overlapping areas at high power, then signal strength is improved, but scalability is limited
Solution Approach 1:
The frequency spectrum is segmented into multiple segments, each of which can be independently allocated to different base stations. This allows the system to scale by assigning different segments to different base stations as the network grows, while maintaining high signal strength in overlapping areas through coordinated high power transmission on shared segments.
Solution Approach 2:
The system dynamically assigns segments to base stations based on their location and transmission requirements. Base stations in overlapping areas can be dynamically assigned to use the same segment for MBS communication, while base stations in non-overlapping areas are assigned to other segments, enabling flexible scaling without compromising signal strength.
3Object-generated harmful factors
If adjacent base stations use different segments at high power level, then uplink interference is minimized, but multi-base station MBS communication cannot be facilitated
Solution Approach 1:
The frequency spectrum is divided into multiple segments, allowing the system to accommodate both requirements: base stations in overlapping areas can use the same segment for MBS communication while base stations in non-overlapping areas use different segments, thereby facilitating multi-base station MBS communication while minimizing uplink interference through coordinated segment allocation.
Solution Approach 2:
The same segment can serve multiple functions simultaneously: it can be used by multiple base stations in overlapping areas for MBS communication while other segments are used by base stations in non-overlapping areas. This multi-functionality enables the system to support both multi-base station MBS communication and uplink interference minimization.
Data Source
AI summary
Managing communication in an orthogonal frequency division multiple access (OFDMA) system using segments in an OFDMA frame is accomplished by setting at least a first segment in the OFDMA frame as a high power segment for a plurality of base station in the OFDMA system. Further, communication is established between at least one base station and at least one communication device in the OFDMA system, in response to setting the at least first segment as a high power segment. Managing the communication further includes assigning a region of the first segment to a set of base stations in the OFDMA system. The assigned region can be used by the set of base stations at high power level to communicate with communication devices located in overlapping areas. A method for coordinating uplink transmission in the OFDMA system for reducing uplink interference is also provided.