Periodic Sidelink Resource Allocation for DRX-Aware Transmission
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently handling periodic sidelink resources and discontinuous reception for sidelink communication, particularly in ensuring optimal power management and resource allocation in next-generation networks.
Innovation Solution
A method and apparatus for a first device to perform sidelink communication by reserving periodic sidelink resources, selecting a destination based on the availability of sidelink resources and DRX configurations, and transmitting data packets on reserved resources, ensuring alignment with the active times of destination devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If periodic sidelink resources are reserved for all destinations, then data transmission reliability is improved, but resource waste occurs when some destinations have no data to send
Solution Approach 1:
The patent implements dynamic resource allocation where the set of reserved periodic sidelink resources is adjusted based on real-time data availability in logical channels. When data becomes available for a destination, resources are allocated; when data is not available, resources are released for other uses. This dynamic adaptation resolves the contradiction between maintaining reliable transmission resources and avoiding resource waste during idle periods.
Solution Approach 2:
The system changes the parameter of resource reservation status based on data availability conditions. The periodic sidelink resources are reserved or released according to whether data is present in the buffer for specific destinations. This parameter change mechanism ensures resources are only consumed when necessary, eliminating waste while maintaining reliability when data needs transmission.
2Loss of time
If devices continuously monitor sidelink resources, then data transmission timeliness is improved, but power consumption increases
Solution Approach 1:
The patent implements discontinuous reception (DRX) where devices periodically wake up to monitor sidelink resources and then enter sleep mode. The monitoring occurs at specific intervals aligned with the periodic sidelink resource reservation pattern. This periodic monitoring approach maintains data transmission timeliness by ensuring devices check for data at regular intervals while dramatically reducing power consumption compared to continuous monitoring.
Solution Approach 2:
The system uses the periodic nature of data transmission requirements to trigger monitoring only when necessary. Devices self-regulate their monitoring activity based on whether data is actually present in logical channels, avoiding unnecessary wake-ups and power consumption while ensuring timely detection of data when it exists.
3Productivity
If periodic sidelink resources are released when data is not available, then resource utilization efficiency is improved, but transmission delay increases when data arrives unexpectedly
Solution Approach 1:
The patent maintains periodic sidelink resource reservations in advance for destinations that have demonstrated data traffic patterns. By pre-reserving resources based on historical or predicted data availability, the system ensures that when data does arrive, resources are already allocated and transmission can occur immediately without delay. This preliminary action balances resource efficiency with transmission timeliness.
Data Source
AI summary
A method and apparatus are disclosed from the perspective of a first device to perform sidelink communication. In one embodiment, the first device has a periodic sidelink resource reservation, wherein the periodic sidelink resource reservation comprises, reserves, or provides one set of sidelink resources in one period. The first device also has one or more sidelink logical channels with available sidelink data, wherein the one or more sidelink logical channels are associated with one or more destinations. Furthermore, the first device selects or determines a first destination, among the one or more destinations, satisfying at least a condition that an initial sidelink resource of the one set of sidelink resources is within sidelink active time associated with the first destination. In addition, the first device generates a first data packet for the first destination. Also, the first device performs one or more sidelink transmissions on the one set of sidelink resources to the first destination, wherein the one or more sidelink transmissions includes, delivers, or comprises the first data packet.