Sidelink Grant Destination Identifier for Receiver Selection
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing sidelink communications between user equipment (UEs), particularly in allocating resources and identifying intended receivers, which affects data throughput and reliability.
Innovation Solution
A method where a base station transmits a grant to a first UE, indicating a resource allocation for sidelink communication with a second UE, including a destination identifier and a mapping between the resource allocation and the destination identifier, thereby explicitly specifying the target UE for the sidelink signal.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a base station allocates resources for sidelink communication without explicitly indicating the destination UE, then resource allocation flexibility is improved, but communication reliability and interference management deteriorate
Solution Approach 1:
The patent introduces a destination identifier field as an intermediary element in the grant message from base station to transmitting UE. This field explicitly identifies the intended receiving UE, enabling the base station to control and manage sidelink communications while maintaining allocation flexibility. The destination identifier acts as a mediator that connects the resource allocation decision with the specific communication pair, thereby improving reliability without sacrificing flexibility.
2Reliability
If the base station provides detailed resource allocation mapping with destination identifiers, then communication reliability improves, but signaling overhead and system complexity increase
Solution Approach 1:
The patent makes the destination identifier field configurable and optional, allowing it to serve multiple functions: explicit destination identification when needed, and implicit or absent identification when not needed. This multi-functionality enables the system to adapt the level of detail in resource allocation messages based on traffic conditions, UE capabilities, and network requirements, thereby improving reliability when necessary while avoiding unnecessary complexity in other scenarios.
3Object-affected harmful factors
If explicit destination identification is implemented in resource allocation, then interference management improves, but data throughput may be reduced due to additional signaling
Solution Approach 1:
The patent enables dynamic configuration of the destination identifier field presence and format based on network conditions, traffic patterns, and interference levels. When interference is high, the destination identifier is included to enable precise interference management. When interference is low and throughput is critical, the field can be omitted or compressed. This parameter change approach allows the system to optimize the trade-off between interference management and data throughput in real-time.
Data Source
AI summary
Methods, systems, and devices for wireless communication are described. A base station may transmit a grant to a first user equipment (UE) that indicates a resource allocation for a sidelink communication, either from the first UE to a second UE or from the second UE to the first UE. The grant may include a destination identifier associated with the sidelink communication, as well as a mapping between the resource allocation and the destination identifier. The destination identifier may be based on information in an indication received from the first UE. In some examples, the base station may configure a default receiver UE for transmissions from the first UE, and the base station may identify a receiver UE in the grant if the intended receiver UE is different than the default receiver UE.