| 2008 |
|---|
| 4 | EE | Xiang Yang Li,
Yigang Cai:
Converged network common charging controller function.
Bell Labs Technical Journal 13(2): 161-183 (2008) |
| 2007 |
|---|
| 3 | EE | Sheng Chen,
Xiangyang Li,
Yigang Cai:
IP multimedia subsystem converged call control services.
Bell Labs Technical Journal 12(1): 145-160 (2007) |
| 2006 |
|---|
| 2 | EE | Yigang Cai,
Xian Yang Li,
Yile Wang,
John B. Reid,
Peng Wang:
IP multimedia subsystem online session charging call control.
Bell Labs Technical Journal 10(4): 117-132 (2006) |
| 2004 |
|---|
| 1 | EE | Yigang Cai,
Jack Kozik,
Helmut L. Raether,
John B. Reid,
Guy H. Starner,
Sunil Thadani,
Kumar V. Vemuri:
Authorization mechanisms for mobile commerce implementations in enhanced prepaid solutions.
Bell Labs Technical Journal 8(4): 121-131 (2004) |
