IEEE Communications Surveys & Tutorials
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 587 - 618
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 512 - 530
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 587 - 618
IEEE Communications Surveys & Tutorials > 2017 > 19 > 1 > 512 - 530