Base Station Time Segment Coordination for Control Channel Interference
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Solution Overview
Problem
Control channel interference between adjacent base stations operating on the same component carriers can lead to increased load issues in wireless communication systems, resulting in reduced throughput and undesirable conditions such as failed control signaling and data transmission retransmissions.
Innovation Solution
Adjacent base stations coordinate to use different time segments per subframe for their control channel communications and avoid downlink data communication in segments designated for the other base station's control channel use, differentially structuring downlink channels on component carriers to minimize interference, and selecting component carriers based on communication type, such as using the same time segments for control channel communication on one carrier but different segments on another.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If adjacent base stations use the same time segments for control channel communication on the same component carrier, then device complexity is reduced and ease of operation is improved, but control channel interference increases leading to failed control signaling and reduced throughput
Solution Approach 1:
The patent divides the time segments within each subframe into different groups for control channel communication. Adjacent base stations are assigned to use different time segment groups for their control channels on the same component carrier, thereby segmenting the time resources to avoid interference while maintaining reliable control signaling.
Solution Approach 2:
The patent introduces a new dimension of time segment coordination between adjacent base stations. By differentiating control channel time segments across base stations on the same component carrier, it adds a temporal separation dimension that eliminates interference without affecting frequency or spatial dimensions.
2Reliability
If adjacent base stations use different time segments per subframe for control channel communication, then control channel interference is reduced improving reliability, but device complexity increases due to coordinated time segment management
Solution Approach 1:
The patent segments time segments within subframes into distinct groups that can be assigned to different base stations. This segmentation allows adjacent base stations to use different time segment groups for control channels, reducing interference while maintaining manageable complexity through structured time resource division.
Solution Approach 2:
The patent changes the time segment parameter assignment for control channels between adjacent base stations. By coordinating and differentiating the time segment parameters used for control channel communication, the system reduces interference while the parameter changes remain manageable through standardized coordination procedures.
3Reliability
If base stations avoid downlink data communication in time segments designated for other base station's control channel, then control channel interference is reduced improving reliability, but productivity decreases due to reduced available traffic channel resources
Solution Approach 1:
The patent segments time resources into control channel segments and traffic channel segments, with adjacent base stations using different control channel time segments. This segmentation allows each base station to maintain full downlink traffic channel capacity in its non-control segments while ensuring reliable control signaling without interference.
Solution Approach 2:
The patent uses time segment coordination as an additional dimension of resource management. By coordinating control channel time segments across base stations, it enables full utilization of traffic channel resources in remaining time segments, maintaining productivity while improving reliability through interference avoidance.
Data Source
AI summary
A method and system for managing time segments per subframe used for downlink control channel communication by adjacent base stations that each provide carrier-aggregation service on first and second component carriers. The base stations may work with each other to differentially structure the component carriers, such that the base stations use different time segments than each other for downlink control channel communication on the first component carrier but the same time segments as each other for downlink control channel communication on the second component carrier. Further, based on this differential structuring, the base stations may then schedule transmission of one type of data on the first component carrier and another type of data on the second component carrier.