Spatially Limited Wireless Transmission Grants for Interference Control
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Solution Overview
Problem
The increasing number of wireless terminals and services at higher frequencies necessitates improved management of radio transmission control and system signaling overhead, particularly in scenarios involving device-to-device communication and radar probing, where conventional resource requests do not account for spatial limitations.
Innovation Solution
Wireless terminals and networks employ transmission grants with spatial limitations, allowing controlled radio transmissions based on defined directions, angles, and ranges to optimize air interface use and minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If wireless terminals transmit radio signals without spatial limitations, then transmission freedom and service capability are improved, but interference to other communications increases and spectrum utilization deteriorates
Solution Approach 1:
The patent applies local quality by differentiating transmission permissions based on spatial location and direction. Instead of uniform transmission rules, the system grants spatially-specific transmission rights where terminals are allowed to transmit only in certain directions or locations, creating localized transmission zones that prevent interference while maintaining transmission freedom where appropriate.
Solution Approach 2:
The patent introduces spatial dimensions (direction, angle, location) as additional constraints to transmission control. By adding these spatial dimensions to the traditional time-frequency resource allocation, the system creates a multi-dimensional resource management framework that enables precise control over where and how terminals transmit, resolving the contradiction between transmission freedom and interference prevention.
2Object-affected harmful factors
If transmission grants include spatial limitations, then interference is reduced and spectrum utilization is improved, but signaling overhead and system complexity increase
Solution Approach 1:
The patent extracts the essential spatial parameters (direction, angle, location) from complex spatial constraint descriptions and incorporates them directly into transmission grants. Instead of transmitting detailed spatial restriction information, the system extracts and communicates only the critical spatial parameters needed for interference avoidance, reducing signaling overhead while maintaining effective interference control.
Solution Approach 2:
The patent changes the parameter representation of spatial limitations by encoding direction, angle, and location information in compact forms within transmission grants. This parameter transformation reduces the amount of signaling required to convey spatial constraints, as the system uses efficient parameter encoding rather than verbose spatial restriction descriptions.
3Ease of operation
If conventional resource requests are used without spatial considerations, then signaling simplicity is maintained, but spectrum utilization and network efficiency deteriorate
Solution Approach 1:
The patent makes transmission grants universal by designing them to carry both traditional resource allocation information and spatial limitation information in a unified structure. This multi-functional grant format allows the system to maintain signaling simplicity while simultaneously enabling spatial-aware resource management, thus improving spectrum utilization without significantly increasing signaling complexity.
Data Source
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AI summary
A method for controlling radio transmission, carried out in a wireless terminal (10), comprising obtaining (435), from a wireless network (100,120), a transmission grant (430) which gives the wireless terminal permission to transmit a radio signal, wherein said transmission grant is indicative of a spatial limitation associated with the permission to transmit; and transmitting (440) the radio signal in accordance with said spatial limitation.