Communication options with WCF - Part 1

using System;
using System.Collections.Generic;
using System.Text;
using System.ServiceModel;
using System.Threading;

namespace AGVController
{
    [ServiceContract(Session=true)]
    public interface IAGVControl
    {
        [OperationContract(IsInitiating=true,IsTerminating=false)]
        int AcquireVehicle();
        [OperationContract(IsTerminating=true,IsInitiating=false)]
        void ReleaseVehicle();
        [OperationContract]
        void MoveTo(int location);
        [OperationContract]
        void Load();
        [OperationContract]
        void Unload();
    }
    [ServiceBehavior(InstanceContextMode=InstanceContextMode.PerSession)]
    public class AGVControl : IAGVControl
    {
        public int AcquireVehicle()
        {
            int vehicleID = 0;
            return vehicleID;
        }
        public void ReleaseVehicle()
        {
        }
        public void MoveTo(int location)
        {
            //This takes a long time...
            Thread.Sleep(5000);
        }
        public void Load()
        {
        }
        public void Unload()
        {
        }
    }
}