White Space Access Point Spectrum Management
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Solution Overview
Problem
There is a need for efficient authentication and authorization of wireless devices in cognitive LTE networks to effectively utilize whitespace spectrum, as existing systems lack efficient methods for managing bandwidth and spectrum changes due to varying primary and secondary user activity.
Innovation Solution
A method and apparatus for wireless communication that involves receiving configuration parameters from a core network to operate in both whitespace and non-whitespace bands, determining the need to use whitespace, requesting authorization from a whitespace database, and selecting a whitespace channel based on received parameters and authorization information, allowing devices to operate as master or slave whitespace devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing systems are used for spectrum management, then licensed bandwidth is maintained, but whitespace spectrum utilization is inefficient
Solution Approach 1:
The system dynamically switches between licensed and whitespace spectrum bands based on availability and network conditions. The base station and mobile entities can adaptively change operating bands, transitioning from static licensed band operation to dynamic multi-band operation that responds to real-time spectrum conditions.
Solution Approach 2:
The system changes operational parameters including frequency band, bandwidth allocation, and transmission power when transitioning between licensed and whitespace bands. Configuration parameters such as subcarrier spacing, cyclic prefix length, and resource block allocation are adjusted according to the specific characteristics of each spectrum band.
2Quantity of substance
If whitespace spectrum is adopted, then bandwidth capacity increases, but authentication complexity increases
Solution Approach 1:
The authentication mechanism is designed to work universally across both licensed and whitespace spectrum bands. A single authentication framework handles multiple spectrum types, with the base station serving multiple functions including authentication server, spectrum manager, and access controller for both licensed and whitespace operations.
Solution Approach 2:
The base station acts as an intermediary between mobile entities and the whitespace spectrum resource. It manages the complex authentication process centrally, mediating between the need for secure whitespace access and the capability of mobile entities, thereby reducing individual device complexity while enabling bandwidth expansion.
3Adaptability or versatility
If spectrum switching is enabled, then adaptability to user activity improves, but system reliability decreases
Solution Approach 1:
The system prepares for potential spectrum switching by maintaining configuration parameters and authentication credentials in advance. Mobile entities are pre-configured with whitespace operation parameters, and the base station maintains ready-state authentication mechanisms, cushioning against potential disruptions when switching between spectrum bands.
Solution Approach 2:
The system continuously monitors spectrum conditions, user activity patterns, and communication quality across different bands. This feedback enables intelligent decision-making for spectrum switching, ensuring transitions occur only when beneficial and maintaining reliability by using feedback from successful transitions to refine switching criteria.
Data Source
AI summary
A method by an access point for wireless communication service includes receiving configuration parameters from a core network entity for operation as a base station using at least one non-white space (non-WS) bandwidth. The method further includes determining whether the received configuration parameters comprise an indication for the access point to use white space (WS) for the service. The method further includes requesting authorization information from a WS database to operate in the WS, in response to the received parameters comprising the indication. An access point comprising a processor, memory and transceiver may be configured to perform the elements of the method, using a computer-readable storage medium or other means.