Beam Grouping for Interference Control in CBRS Base Stations
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Solution Overview
Problem
Existing dynamic spectrum access (DSA) systems, such as those in the Citizens Broadband Radio Service (CBRS), do not adequately consider beamforming functions in wireless base stations, leading to inefficient use of radio wave resources due to increased calculation complexity and mismatched transmission power allocation among beams.
Innovation Solution
A communication control apparatus that groups multiple beams of a communication apparatus capable of beamforming and controls their use in units of groups, reducing calculation complexity and optimizing transmission power allocation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If transmission power is decreased for each base station to protect primary system, then interference to primary system is reduced, but transmission power of other beams is also determined according to the beam giving strongest interference, resulting in inefficient radio wave resource utilization
Solution Approach 1:
The patent segments the beams into different groups (first group and second group) based on their interference characteristics to the primary system. The communication control apparatus calculates and allocates interference margins specifically for each group, allowing differentiated power control. This segmentation enables the system to protect the primary system from harmful interference while allowing beams with weaker interference to utilize radio wave resources more efficiently, thus resolving the contradiction between interference reduction and resource utilization efficiency.
2Object-affected harmful factors
If individual beam evaluation and power determination is performed, then interference protection is improved, but calculation amount increases in proportion to the number of beams
Solution Approach 1:
The patent merges beams with similar interference characteristics into groups. Instead of evaluating each beam individually, the communication control apparatus evaluates interference at the group level and allocates interference margins to groups. This merging approach maintains adequate interference protection while significantly reducing calculation complexity, as the calculation amount no longer increases in direct proportion to the number of beams but rather to the number of groups.
3Device complexity
If beams are divided into groups and controlled in units of groups, then calculation complexity is reduced, but individual beam optimization may be compromised
Solution Approach 1:
The patent applies local quality by allocating different interference margins to different beam groups based on their specific interference characteristics. The communication control apparatus calculates the total interference power for each group and allocates interference margins accordingly, allowing each group to have optimized power levels suited to its local interference situation. This approach maintains beam allocation efficiency while reducing calculation complexity compared to individual beam evaluation.
Data Source
AI summary
[Problem] An amount of calculation of communication using beamforming is reduced. [Solution] A communication control apparatus according to the present disclosure includes a processing unit configured to divide a plurality of beams of a communication apparatus capable of transmitting the plurality of beams into one or more groups, and control use of the beams in the communication apparatus in units of groups.