Interference Signal Transmission for Wireless Resource Control
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Solution Overview
Problem
In peer-to-peer wireless communication networks lacking centralized control, hidden node conditions lead to interference issues due to devices being unaware of each other's transmissions, causing concurrent use of the same air link resources and resulting in unreliable signal decoding.
Innovation Solution
A communications device detects insufficient signal quality and transmits an interference signal on the shared resource to prompt other devices to switch to a different resource, using a processor to evaluate signal quality and determine the need for an interference signal, thereby mitigating interference and ensuring reliable decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If peer-to-peer networks lack centralized control to enable device autonomy, then device freedom and network simplicity are improved, but interference detection capability and communication reliability deteriorate
Solution Approach 1:
The patent implements a feedback mechanism where devices monitor signal quality and transmit quality indicators back to the network. When a device detects poor signal quality or interference, it sends feedback information allowing the network to identify hidden node conditions and coordinate resource allocation, thereby maintaining reliability while preserving device autonomy.
Solution Approach 2:
The patent introduces a network coordinator or intermediary device that facilitates communication between peer-to-peer devices. This intermediary manages resource allocation and coordinates transmissions to prevent hidden node interference, allowing autonomous devices to operate reliably without centralized control.
2Device complexity
If devices transmit on shared air link resources without centralized coordination, then network simplicity and device freedom are improved, but interference levels and signal decoding reliability worsen
Solution Approach 1:
The patent implements preliminary actions where devices perform channel measurements and quality evaluations before transmitting on shared resources. Devices assess signal conditions in advance and exchange this information to prevent concurrent transmissions that would cause interference, maintaining network simplicity while reducing harmful effects.
Solution Approach 2:
Devices transmit quality indicators and feedback signals that provide information about the current transmission environment. This feedback loop allows devices to adjust their behavior and avoid interfering with each other on shared resources, reducing interference levels while preserving network simplicity.
3Productivity
If devices use the same air link resource without detecting each other's transmissions, then resource utilization efficiency is improved, but signal decoding reliability deteriorates due to hidden node interference
Solution Approach 1:
Devices perform preliminary channel measurements and quality evaluations before selecting shared resources. By assessing signal conditions in advance and exchanging this information, devices can efficiently allocate resources while preventing hidden node interference that would compromise decoding reliability.
Solution Approach 2:
The patent introduces intermediary mechanisms that facilitate resource coordination between devices. These intermediaries enable efficient resource sharing while ensuring that hidden node conditions are detected and resolved, maintaining both productivity and reliability.
Data Source
AI summary
Methods and apparatus for detecting, controlling and/or mitigating interference are described. Various embodiments are well suited to wireless communications systems in which shared communications resources are used, e.g., in a peer to peer communications systems lacking centralized control. In some embodiments, a communications device receives signals on shared communications resource, evaluates its capability to decode a received signal, and conditionally transmits an interference signal, e.g., on the shared communications resource. The interference signal is intended to cause a device transmitting on the shared communications resource to switch to a different communications resource, e.g., in response to the interference signal, so that its transmitted signal can be successfully decoded. In at least one embodiment, the shared communications resource is a peer discovery air link resource associated with a peer discovery resource identifier.