Bluetooth: Connect Without Cables
Bluetooth: Connect Without Cables
Basestation collaboration in Bluetooth voice networks
Computer Networks: The International Journal of Computer and Telecommunications Networking - Mobile and ad hoc local networks
SCO link sharing in Bluetooth voice access networks
Journal of Parallel and Distributed Computing - Special issue on wireless and mobile ad hoc networking and computing
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In the near future Bluetooth will be embedded into manydifferent types of mobile and portable devices [1 ].Initiallythis will provide simple ire replacement functions for ap-plications such as hands-free headsets for cellular radio.Ho ever, this ill also enable future picocellular servicessuch as real-time voice and data. There are many possibleapplications for this such as telephone lounges in airports,shopping malls and other public places [2 ].In this paper, we consider several Bluetooth-based tele-phony basestation (BS)designs.Since the number of SCOlinks per Bluetooth node is very limited, the designs con-sider the use of multiple overlapping Bluetooth basesta-tions/chips.The first scheme is a direct implementation ofthe telephony profile here the Bluetooth basestations op-erate independently, without any coordination.When a mo-bile comes within range of the system, it associates witha basestation using the normal Inquiry/Page process. Thesecond scheme, BBSM (Bluetooth Basestation with Migra-tion), reduces the probability of blocking by having mobilenodes re-associate with available basestations when theircurrent basestation is about to become blocked by SCOlinks.This improves the performance of the system froma blocking standpoint, but can be very spectrally waste-ful.The third design, BBSS (Bluetooth Basestation withStandby), further improves blocking performance and de-creases the wasteful effects of "node migration storms"which can occur in BBSM.We also include results for a de-sign which uses ACL-based voice links.This scheme givesthe best performance but has the disadvantage that morecomplex vocoding is required.