Selective Channel Reservation for Multi-User Scheduling
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Solution Overview
Problem
In wireless communication systems, existing channel reservation methods for multi-user scheduling often lead to inefficient use of shared radio frequency spectrum bands due to broad silencing procedures that prevent all users from transmitting, even if only some users would cause interference.
Innovation Solution
Implementing a targeted preamble that selectively identifies and silences only the necessary resources within a transmission opportunity, allowing other users to continue transmitting on different resources, thereby optimizing spectrum use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If broad silencing procedures are used to protect transmissions in shared spectrum bands, then link quality is improved, but spectrum efficiency deteriorates due to unnecessary silencing of non-interfering users
Solution Approach 1:
The patent segments the set of silenced users into two groups: those that must be silenced to protect the transmission and those that can continue transmitting. This is achieved by identifying specific interfering users based on their transmission patterns and characteristics, rather than silencing all users in the shared spectrum band. The segmentation allows selective silencing that maintains link quality while preserving spectrum efficiency.
Solution Approach 2:
The patent applies different treatment to different users in the shared spectrum band based on their interference characteristics. Users identified as interference sources are silenced, while non-interfering users are allowed to continue transmitting. This local differentiation of quality control measures resolves the contradiction by applying silencing only where necessary rather than uniformly across all users.
2Reliability
If all resources of a transmission opportunity are protected, then transmission reliability is improved, but resource utilization deteriorates due to preventing all other transmissions
Solution Approach 1:
The patent segments the transmission resources into protected resources and non-protected resources. By identifying specific interfering users and their affected resources, the system can protect only the necessary portion of resources while allowing other resources to be utilized by non-interfering users. This selective resource protection maintains transmission reliability while improving overall resource utilization.
Solution Approach 2:
The patent applies partial silencing rather than complete silencing of all resources. By silencing only the specific resources that are actually interfered with and allowing other resources to remain available, the system achieves adequate transmission protection without the excessive action of shutting down all potential transmissions. This partial action resolves the contradiction between reliability and resource utilization.
3Productivity
If targeted silencing of specific interference sources is implemented, then spectrum efficiency is improved by allowing non-interfering users to transmit, but system complexity increases due to interference identification requirements
Solution Approach 1:
The patent performs preliminary identification of interference sources before implementing silencing measures. By detecting and characterizing interfering users in advance based on their transmission patterns and characteristics, the system can make informed decisions about which users to silence. This preliminary action simplifies the overall process by avoiding the need for complex real-time analysis during transmission protection.
Solution Approach 2:
The patent employs feedback mechanisms to identify interference sources by monitoring transmission patterns and characteristics of users in the shared spectrum band. This feedback-based identification approach allows the system to automatically distinguish between interfering and non-interfering users without requiring complex manual configuration or analysis, thereby improving spectrum efficiency while keeping system complexity manageable.
Data Source
AI summary
Techniques are described herein to selectively protect some resources of a transmission opportunity, but not all resources of a transmission opportunity. A base station may schedule resources to be used to communicate data with a user equipment (UE). To indicate to potential interference sources, a silencing message may broadcast to other network entities. The silencing message may include an indication of resources to be protected for a transmission between the base station and the UE. The silencing message may indicate a subset of resources that is less than a set of all resources of a transmission opportunity. In some examples, the silencing message may indicate a subset of frequency subbands of the transmission opportunity. In response to the silencing message, potential interference sources may refrain from communicating data during the indicated subset of resources.