Title :
UPC based bandwidth allocation for VBR video in wireless ATM links
Author :
Biswas, S.E. ; Reininger, D. ; Raychaudhuri, D.
Author_Institution :
NEC Res. Inst., Princeton, NJ, USA
Abstract :
This paper presents a medium access level VBR bandwidth allocation scheme for wireless ATM (WATM) networks. After introducing a wireless ATM system model and the associated dynamic TDMA/TDD medium access control (MAC) scheme, an algorithm for VBR slot allocation is proposed. The algorithm combines information from user parameter control (UPC) at the call admission control (CAC) level with rapid MAC level estimates of the requirements for each VBR virtual circuit (VC). The method described is applicable to both conventional VBR and VBR+ in which UPC parameters are dynamically renegotiated as source bit rate requirements vary. Simulation experiments using statistically multiplexed MPEG-1 video are carried out for a typical 25 Mbps dynamic TDMA/TDD wireless ATM access link scenario. Experimental results show that, for the VBR video under consideration, the proposed scheme can achieve throughputs in the range of 60-70% while maintaining reasonable QoS
Keywords :
asynchronous transfer mode; cellular radio; channel capacity; data communication; land mobile radio; radio spectrum management; telecommunication congestion control; time division multiple access; visual communication; MAC scheme; TDMA/TDD medium access control; TDMA/TDD wireless ATM access link scenario; UPC based bandwidth allocation; VBR slot allocation; VBR video; VBR+; WATM networks; call admission control; medium access level VBR bandwidth allocation scheme; source bit rate; statistically multiplexed MPEG-1 video; throughputs; user parameter control; virtual circuit; wireless ATM links; Asynchronous transfer mode; Bandwidth; Bit rate; Channel allocation; Communication system traffic control; Media Access Protocol; Personal communication networks; Switches; Telecommunication traffic; Time division multiple access;
Conference_Titel :
Communications, 1997. ICC '97 Montreal, Towards the Knowledge Millennium. 1997 IEEE International Conference on
Conference_Location :
Montreal, Que.
Print_ISBN :
0-7803-3925-8
DOI :
10.1109/ICC.1997.610048
