Sidelink Resource Management for User Equipment Transmit Capability
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Solution Overview
Problem
User equipment (UE) with limited transmit (Tx) capability faces challenges in performing simultaneous sidelink transmissions on multiple carriers due to limitations such as a limited number of simultaneous transmission carriers, unsupported carrier combinations, and interruptions for radio frequency (RF) retuning.
Innovation Solution
The UE selects resources on multiple carriers, determines which simultaneous transmissions are not supported by its Tx capability, and transmits assistant information associated with these unsupported transmissions to other UEs or a base station to manage resource allocation and avoid capability exceedance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a UE performs simultaneous transmissions on multiple carriers, then the productivity of sidelink communication is improved, but the transmit capability of the UE may be exceeded
Solution Approach 1:
The UE determines in advance which simultaneous transmissions are not supported by its transmit capability before attempting to perform them. By pre-identifying unsupported transmission combinations, the UE avoids capability exceedance and ensures reliable transmission execution.
Solution Approach 2:
Assistant information acts as an intermediary mechanism between the UE's transmit capability constraints and the resource allocation decisions. This information mediates the coordination between multiple carriers by conveying capability limitations to other UEs, enabling them to adjust resource allocation accordingly.
2Adaptability or versatility
If the UE supports more carrier combinations for simultaneous transmission, then the adaptability of the system is improved, but the device complexity increases
Solution Approach 1:
The UE segments its transmit capability into specific supported and unsupported carrier combinations. By dividing the overall carrier support into discrete capability units, the UE can clearly identify which combinations are supported without requiring complex overall management of all possible combinations.
Solution Approach 2:
The UE autonomously determines and manages its own transmit capability limitations without requiring external configuration or control. By self-identifying unsupported transmissions and generating assistant information independently, the UE reduces the need for complex network-side capability management.
3Productivity
If the UE transmits assistant information about unsupported transmissions, then the resource allocation efficiency is improved, but the loss of time for capability determination increases
Solution Approach 1:
The UE performs capability determination and generates assistant information in advance before actual transmissions occur. By pre-determining which carrier combinations are unsupported and preparing the assistant information beforehand, the UE minimizes time loss during actual transmission operations.
Solution Approach 2:
The assistant information provides feedback to other UEs about the UE's transmit capability limitations. This feedback mechanism enables other UEs to make informed resource allocation decisions without requiring repeated capability queries, thereby improving overall resource allocation efficiency while amortizing the capability determination time.
Data Source
AI summary
The present application relates to methods and apparatuses for sidelink transmission. An embodiment of the present disclosure provides a user equipment (UE), which may include a transceiver; and a processor coupled to the transceiver. The processor may be configured to: select at least one resource on at least one carrier of a plurality of carriers; determine that a simultaneous transmission of a first transmission on a first resource on a first carrier of the plurality of carriers and at least one transmission on the at least one resource is not supported by a transmit capability of the UE, wherein the first carrier is different from the at least one carrier; and transmit assistant information associated with the first resource to another UE.