Bluetooth: Carrying voice over ACL links

R. Kapoor, Ling-Jyh Chen, Yeng Zhong Lee, M. Gerla

Research output: Chapter in Book/Report/Conference proceedingConference contribution

19 Citations (Scopus)

Abstract

Bluetooth technology will enable users to connect a wide range of electronic devices. Bluetooth devices can connect to form a piconet. Two types of connections can be established in a piconet: the synchronous connection-oriented (SCO) link, and the asynchronous connectionless (ACL) link. SCO links provide a circuit-oriented service with constant bandwidth based on a fixed and periodic allocation of slots. They require a pair of slots once every two, four or six slots, depending upon the SCO packet used. ACL connections, on the other hand, provide a packet-oriented service and span over 1, 3 or 5 slots. The master of the piconet uses a polling mechanism to divide the piconet bandwidth among the ACL links. Since SCO links require a periodic allocation of a pair of slots, they leave very little of the piconet bandwidth available to ACL links. Moreover, the controlled access of Bluetooth ensures that no ACL link gets starved. Under such an access mechanism, ACL links may be sufficient to carry high-quality voice and SCO links may not be needed. Though the voice quality is affected slightly by using ACL instead of SCO links for voice, TCP connections perform much better if SCO links are not used. This paper, thus, makes a case for using ACL in place of SCO links for carrying voice. This renders SCO links redundant.

Original languageEnglish
Title of host publication2002 4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages379-383
Number of pages5
ISBN (Electronic)0780376056, 9780780376052
DOIs
Publication statusPublished - 2002 Jan 1
Event4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002 - Stockholm, Sweden
Duration: 2002 Sep 92002 Sep 11

Publication series

Name2002 4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002

Other

Other4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002
CountrySweden
CityStockholm
Period02/9/902/9/11

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ASJC Scopus subject areas

  • Computer Networks and Communications

Cite this

Kapoor, R., Chen, L-J., Lee, Y. Z., & Gerla, M. (2002). Bluetooth: Carrying voice over ACL links. In 2002 4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002 (pp. 379-383). [1045792] (2002 4th International Workshop on Mobile and Wireless Communications Network, MWCN 2002). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/MWCN.2002.1045792