Service Scheduling for D2D Discovery Power Reduction
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Solution Overview
Problem
In Device-to-Device communication systems, devices face high power consumption and inefficiency due to the need to continuously listen to channels for service identification, which is time-consuming and burdensome.
Innovation Solution
Implementing a service scheduling method that assigns specific time slots to service types, allowing devices to listen and transmit only during designated times, reducing unnecessary power usage and processor cycles without requiring additional resources or channels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If devices continuously listen to channels for service identification, then service discovery reliability is improved, but power consumption increases
Solution Approach 1:
The patent implements periodic service announcements where services are broadcast at specific time intervals rather than continuously. Devices listen for service identification data at predetermined periodic moments, ensuring reliable service discovery while allowing devices to enter low-power states between these periodic listening events, thus resolving the contradiction between discovery reliability and power consumption.
Solution Approach 2:
The patent establishes predetermined time slots and scheduling arrangements for service announcements before actual service discovery occurs. Devices are pre-configured with knowledge of when to expect service identification data, allowing them to wake up at specific times to listen and then return to sleep mode, thereby maintaining reliable service discovery while minimizing continuous power consumption.
2Reliability
If devices continuously listen to channels for service identification, then service discovery completeness is improved, but processing time increases
Solution Approach 1:
By implementing periodic service announcements at predetermined time intervals, the patent ensures that all services are announced systematically over time without requiring continuous listening. Devices can wake up at each periodic interval to capture service identification data, ensuring completeness of service discovery while limiting processing time to discrete periodic events rather than continuous operation.
Solution Approach 2:
The patent pre-establishes time slot arrangements and scheduling information that devices can use to know exactly when to listen for service announcements. This preliminary scheduling allows devices to efficiently wake up at predetermined times, capture necessary service identification data, and return to low-power states, thereby achieving complete service discovery without excessive processing time investment.
3Loss of energy
If service scheduling is implemented with time slot assignments, then power efficiency is improved, but system complexity increases
Solution Approach 1:
The patent pre-configures time slot assignments and service scheduling information in advance, allowing devices to know beforehand when to listen for service announcements. This preliminary arrangement simplifies the actual operation as devices only need to wake up at predetermined times rather than continuously monitoring, improving power efficiency while keeping implementation complexity manageable through pre-established schedules.
Solution Approach 2:
The patent implements a universal service scheduling mechanism that can accommodate multiple services and devices through a common time slot assignment framework. Rather than requiring complex individual scheduling for each service or device, a universal scheduling approach is used that applies to all services, reducing overall system complexity while maintaining power efficiency through standardized periodic listening intervals.
Data Source
AI summary
A method in a base station comprising a memory storing one or more service types and a radio interface that communicates with a device. The method includes arranging a service scheduling by assigning at least one time slot to a service type and transmitting information on said service scheduling to a device.