Research Article

Multitask Offloading Strategy for Edge Computing in Time-Sensitive Networking

Table 1

Summary of notations and definitions.

NotationDefinition

The edge device i,
The ECS n,
The set of edge devices,
The set of ECSs,
a task generated on
The size of the unoffloadable tasks on , including code and data
The size of the offloadable tasks on , including code and data
The processing density of tasks in
The arrival rate of the unoffloadable tasks generated on
If , the arrival rate of tasks computed locally in if , the arrival rate of tasks offloaded from to
The sum of arrival rates of offloadable tasks generated on ,
The arrival rate of the original TSN stream of priority p to in the TSN gateway
The available maximum offloading task arrival rate from all edge devices to
vThe bandwidth of the TSN network
If , the execution time of tasks computed locally in if , the execution time of the tasks generated on and computed remotely in
Mean of
The average time that the members of the hybrid streams spend in queue
If , the average time cost of the tasks computed locally in if , the average time cost of the tasks generated on and computed remotely in
The average time cost when all tasks are processed locally in
The average time cost of all tasks generated on
The average waiting time of the tasks from all edge devices to spent in TSN gateway
The length of the original TSN packages in queue
The service interrupted time of queue
The service time of the original the TSN substream in
All the service time of the compound stream in
The processing frequency of
The processing frequency of
The multi-task offloading game
The task offloading strategy of the
The task offloading strategy set of all edge devices except
The task offloading strategy space of all edge devices
The accuracy parameter