Bandwidth allocation for VoIP traffic in network having interface between frame relay and ATM

• US 7,586,923 B2
• Filed: 02/14/2005
• Issued: 09/08/2009
• Est. Priority Date: 02/14/2005
• Status: Expired due to Fees

• Current Assignee: Sbc Knowledge Ventures, L.P.
• Original Assignee: AT&T Intellectual Property I LP (AT&T, Inc.)
• Inventors: Chen, Wengo, Zhao, Yongdong, Soon, Shih-Chung, Tan, Teong Yee
• Primary Examiner(s): Chan; Wing F
• Assistant Examiner(s): Tsegaye; Saba
• Application Number:
  US11/057,857
• Publication Number:
  US 20060182024A1
• Time in Patent Office: 1,667 Days
• Field of Search: 370/229, 370/230, 370/230.1, 370/236, 370/352, 370/356, 370/395.1, 370/395.4, 370/395.41, 370/395.52, 370/395.6, 370/395, 370/61, 370465-467, 370/395.63
• US Class Current: 370/395.52
• CPC Class Codes: H04L 1/0014 by adapting the source coding
• CPC Class Codes: H04L 2012/647 Frame Relay, X.25
• CPC Class Codes: H04L 65/1101 Session protocols
• CPC Class Codes: H04L 65/65 Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
• CPC Class Codes: H04L 65/70 Media network packetisation

Abstract

A frame relay data rate R_FR for a VoIP call is determined based on a particular packetization time interval T_S and its associated sample data size B_S for a particular CODEC, a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of an IP header. A number of VoIP calls NUM_VOIP that can be supported by a frame relay access link is determined based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic, and the frame relay data rate R_FR. At least one network parameter is determined based on NUM_VOIP. Bandwidth in an asynchronous transfer mode (ATM) network is allocated for the VoIP traffic based on the at least one network parameter.

Claims

1. A method comprising:

determining a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determining a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR, wherein the bandwidth of the frame relay access link that is to be allocated to VoIP traffic is a product of a bandwidth B_RF of the frame relay access link and a predetermned fraction R _P of the bandwidth of the frame relay access link that is to be allocated to VoIP traffic;

determining at least one network parameter based on NUM_VOIP; and

allocating bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

2. The method of claim 1 wherein the at least one network parameter comprises a maximum burst rate (MBS) based on NUM_VOIP.

3. The method of claim 1 further comprising:

determining at least one layer-3 parameter based on NUM_VOIP; and

monitoring the VoIP traffic based on the at least one layer-3 parameter.

4. The method of claim 3 wherein the at least one layer-3 parameter comprises a committed information rate (CIR), the CIR based on a product of NUM_VOIP and an Internet Protocol data rate R_IP for the VoIP call.

5. The method of claim 3 wherein the at least one layer-3 parameter comprises a committed burst size (Bc), wherein Bc is proportional to NUM_VOIP.

6. The method of claim 1 wherein the size B_IP of the at least one header in the IP packet for the VoIP call is a combined size of a real-time protocol (RTP) header, a user datagram protocol (UDP) header, and an IP header.

7. A computer-readable medium encoded with computer-readable program code to cause a computer system to:

determine a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determine a number of VoIP calls NUM_VoIP p that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR, wherein the bandwidth of the frame relay access link that is to be allocated to VoIP traffic is a product of a bandwidth B_FR of the frame relay access link and a predetennined fraction R_P of the bandwidth of the frame relay access link that is to be allocated to VoJIP traffic;

determine at least one network parameter based on NUMR_VOIP; and

allocate bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

8. The computer-readable medium of claim 7 wherein the at least one network parameter comprises a maximum burst rate (MBS) based on NUM_VOIP.

9. The computer-readable medium of claim 7 wherein the computer-readable program code further causes the computer system to:

determine at least one layer-3 parameter based on NUM_VOIP; and

monitor the VoIP traffic based on the at least one layer-3 parameter.

10. The computer-readable medium of claim 9 wherein the at least one layer-3 parameter comprises a committed information rate (CIR), the CIR based on a product of NUM_VOIP and an Internet Protocol data rate R_IP for the VoIP call.

11. The computer-readable medium of claim 9 wherein the at least one layer-3 parameter comprises a committed burst size (Bc), wherein Bc is proportional to NUM_VOIP.

12. The computer-readable medium of claim 7 wherein the size B_IP of the at least one header in the IP packet for the VoIP call is a combined size of a real-time protocol (RTP) header, a user datagram protocol (UDP) header, and an IP header.

13. A method comprising:

determining a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determining a number of VoIP calls NUM_VoIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR , wherein NUM_VoIP=floor[R_p*B_FR/R_FR] and wherein B_FR is a bandwidth of the frame relay access link and R_p is a predetermined fraction of the bandwidth of the frame relay access link that is to be allocated to VoIP traffic;

determining at least one network parameter based on NUM_VoIP ; and

allocating bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

14. A method comprising:

determining a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call, wherein R_FR is based on (B_HT+B_IP+B_S)/T_S;

determining a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR;

determining at least one network parameter based on NUM_VOIP; and

allocating bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

15. A method comprising:

determining a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determining a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR;

determining at least one network parameter comprising a sustained cell rate (SCR) based on NUM_VOIP and an ATM data rate R_ATM for the VoIP call, wherein B_FR is a bandwidth of the frame relay access link, SCR= NUM_VOIP*R_ATM+(B_FR−

NUM_VOIP*R_FR)*k and k is a constant; and

allocating bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

16. The method of claim 15 wherein k=53/48.

17. A computer-readable medium encoded with computer-readable program code to cause a computer system to:

determine a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determine a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR , wherein NUM_VOIP=floor[R_p*B_FR/R_FR] and wherein B_FR is a bandwidth of the frame relay access lilnk and R_p is a predetermined fraction of the bandwidth of the frame relay access link that is to be allocated to VoIP traffic;

determine at least one network parameter based on NUM_VOIP; and

allocate bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

18. A computer-readable medium encoded with computer-readable program code to cause a computer system to:

determine a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call, wherein R_FR is based on (B_HT+B_IP+B_S)/T_S;

determine a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR;

determine at least one network parameter based on NUM_VOIP; and

allocate bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

19. A computer-readable medium encoded with computer-readable program code to cause a computer system to:

determine a frame relay data rate R_FR for a Voice over Internet Protocol (VoIP) call based on a packetization time interval T_S and its associated sample data size B_S for a particular coder-decoder (CODEC), a size B_HT of at least one of a frame relay header and a frame relay trailer, and a size B_IP of at least one header in an IP packet for the VoIP call;

determine a number of VoIP calls NUM_VOIP that can be supported by a frame relay access link based on a bandwidth of the frame relay access link that is to be allocated to VoIP traffic and the frame relay data rate R_FR;

determine at least one network parameter comprising a sustained cell rate (SCR) based on NUM_VOIP and an ATM data rate R_ATM for the VoIP call, wherein B_FRis a bandwidth of the frame relay access link, SCR=NUM_VOIP*R_ATM+(B_FR−

NUM_VOIP*R_FR)*k and k is a constant; and

allocate bandwidth in an asynchronous transfer mode (ATM) network for the VoIP traffic based on the at least one network parameter.

20. The computer-readable medium of claim 19 wherein k53/48.