Porter hasn't played since Oct. 7, as doctors have tried to regulate medication he needs after experiencing similar symptoms to those he felt before having a seizure over the summer.
Porter said he has felt fine for two or three weeks.
Since Porter left the lineup, Chris Harris has moved into the starting cornerback position. Porter said he didn't know what role he'd play Sunday but was simply grateful to be back practicing and traveling with the team.
"I looked at it as a lesson, trying to teach me something, open my eyes to something new," he said.