Spectrum Access Response Structure for CBSD Coexistence Control
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing CBRS communication systems face conflicts in response codes when multiple Citizens Broadband Service Devices (CBSDs) request the same frequency band, leading to potential hindrance of the Spectrum Access System (SAS) function due to interference, as the conventional techniques do not adequately manage coexistence between CBSDs and primary users.
Innovation Solution
A communication control device that includes a reception unit for receiving requests from secondary use communication devices, a first determination unit for generating responses based on judgment, and a transmission unit for transmitting these responses to manage frequency band use, preventing interference and ensuring proper SAS function.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the CxM function is added to SAS to manage coexistence with primary users, then the ability to reduce interference between secondary users and primary users is improved, but the original SAS response codes are overwritten by CxM response codes, leading to hindrance of the SAS function
Solution Approach 1:
The response message is segmented into multiple parts: an original response code from SAS and additional CxM response codes. This segmentation allows both SAS and CxM functions to coexist without overwriting, as each function's response is preserved as a separate element in the composite response message.
Solution Approach 2:
The CxM response codes are nested within the overall SAS response framework. The original SAS response code is retained as the base structure, and CxM response information is embedded within it, creating a hierarchical response structure that preserves both functions.
2Productivity
If multiple CBSDs request the same frequency band, then spectrum utilization is improved, but conflicts occur in response codes and interference between CBSDs arises
Solution Approach 1:
The system implements feedback mechanisms where the SAS evaluates interference conditions between multiple CBSDs requesting the same frequency band and adjusts response codes accordingly. The CxM function provides additional feedback about coexistence conditions, allowing the SAS to make informed decisions about frequency band allocation that prevent interference while maintaining high spectrum utilization.
3Measurement precision
If the SAS provides detailed response codes for each CBSD request, then the precision of frequency band management is improved, but the complexity of response code management increases
Solution Approach 1:
The response message structure is designed to be universal, accommodating both original SAS response codes and additional CxM response codes within a single standardized format. This multi-functional response structure eliminates the need for separate message types, reducing management complexity while maintaining precise frequency band control.
Data Source
AI summary
A method and corresponding control circuitry that receives, from a secondary use communication device that provides the secondary communication service that is a communication service using at least a part of a frequency band used by a primary communication service, a request for using the frequency band, including information of a secondary use communication device group including the secondary use communication device. The control circuitry generates a first response according to a result of a judgment related to the use of the frequency band in the received request. Based on the judgment result, the control circuitry generates a second response including the information regarding the use in the secondary use communication device group. The control circuitry controls a transmitter to transmit the generated first response and second response to the secondary use communication device.