Shared Spectrum Occupation via Resource Reservation Information
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Solution Overview
Problem
In wireless communications networks, shared unlicensed spectra between different wireless communications systems or operators face challenges in accurately determining the occupation status due to differing encryption processing and cell identity scrambling, leading to inefficiencies in resource utilization and potential conflicts.
Innovation Solution
A method and device that utilize a preset correspondence to send resource reservation information, allowing communications nodes to determine the occupation manner of shared spectra by using specific sequences and frequencies, enabling accurate parsing of resource occupation without demodulating signal content, even across different systems or operators.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If virtual carrier sensing is used to reduce power consumption and resolve node hiding problems, then power consumption is reduced and node hiding is resolved, but nodes from different operators cannot learn the occupation status of shared spectrum resources due to different encryption processing and cell identity scrambling
Solution Approach 1:
The patent introduces a common sequence resource as an intermediary that is not encrypted or scrambled by operator-specific processing. This mediator allows nodes from different operators to exchange and detect occupation status information without being blocked by encryption barriers, while still utilizing the power-efficient virtual carrier sensing mechanism.
Solution Approach 2:
The patent segments the resource reservation information into two parts: operator-specific encrypted content and a common unencrypted sequence resource. The common sequence resource can be detected by all operators without decryption, enabling cross-operator occupation status learning while maintaining operator-specific security for other information.
2Measurement precision
If physical carrier sensing is used to detect spectrum occupation, then occupation status can be detected, but power consumption increases due to continuous sensing state requirement
Solution Approach 1:
The patent implements periodic virtual carrier sensing where nodes sense the common sequence resource at specific intervals rather than continuously. This periodic detection mechanism maintains adequate occupation status awareness while significantly reducing power consumption compared to continuous physical carrier sensing.
Solution Approach 2:
The common sequence resource acts as a mediator that enables occupation status detection without requiring continuous physical sensing. Nodes can infer occupation status from the presence or absence of detectable sequences, reducing the need for continuous energy-consuming physical carrier sensing.
3Reliability
If different operators use different encryption processing and cell identity scrambling for shared spectrum, then operator security and identity protection are maintained, but virtual carrier sensing cannot work across operators to learn occupation status
Solution Approach 1:
The patent segments resource reservation information into encrypted operator-specific parts and unencrypted common sequence parts. The segmented common sequence resource can be detected by all operators without decryption, enabling cross-operator occupation status learning while maintaining operator-specific security for other information.
Solution Approach 2:
The unencrypted sequence resource serves as an intermediary that bridges different operator systems. It carries occupation status information in a form that all operators can detect without decryption, while the encrypted parts maintain operator-specific security and identity protection.
Data Source
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AI summary
The present invention relates to a method and a device for occupying a shared spectrum. The method includes: determining, by a first communications node according to a resource occupation manner to be performed by the first communications node for a shared spectrum, a sending resource of resource reservation information by using a preset correspondence, where the correspondence includes a relationship between at least two of the resource occupation manner and at least two of the sending resource, and the resource reservation information represents the resource occupation manner; and sending, by the first communications node, the resource reservation information by using the sending resource, so that a second communications node parses the sending resource of the resource reservation information, and determines, by using the correspondence, the resource occupation manner of the first communications node for the shared spectrum. Even in a case in which a spectrum resource is shared between communications nodes belonging to different wireless communications systems and/or operators, by means of the present invention, the communications nodes can still accurately learn an occupation status of each other for the shared spectrum.