Microwave 1/2 cup port at HIGH in a microwave-safe bowl 1 minute; add cranberries, and let stand 15 minutes.
Bring chicken broth to a boil in a medium saucepan. Stir in couscous and cranberry mixture. Cover and remove pan from heat; let stand 10 minutes. Fluff couscous with a fork. Sprinkle with pecans, and serve immediately.