蓝牙语音网络中的基站协作

Jingxin Xue, T. D. Todd
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引用次数: 9

摘要

在不久的将来,蓝牙将被嵌入到许多不同类型的移动和便携式设备中。最初,它将为蜂窝无线电免提耳机等应用提供简单的电线更换功能。然而,这也将使未来的微蜂窝服务,如实时语音和数据成为可能。有许多可能的应用,如机场、购物中心和其他公共场所的电话休息室。我们考虑了几种基于蓝牙的电话基站(BS)设计。由于每个蓝牙节点的SCO链路数量非常有限,因此设计考虑使用多个重叠的蓝牙基站/芯片。第一种方案是电话配置文件的直接实现,其中蓝牙基站独立运行,不需要任何协调。当移动设备进入系统范围时,它使用正常的查询/页面进程与基站关联。第二种方案,BBSM(带迁移的蓝牙基站),当移动节点的当前基站即将被SCO链路阻塞时,通过让它们与可用的基站重新关联来降低阻塞的可能性。从阻塞的角度来看,这提高了系统的性能,但可能非常浪费频谱。第三种设计,BBSS(待机蓝牙基站),进一步提高了阻塞性能,减少了在BBSM中可能发生的“节点迁移风暴”的浪费效应。我们还包括使用基于acl的语音链接的设计结果。该方案提供了最佳的性能,但缺点是需要更复杂的语音编码。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Basestation collaboration in Bluetooth voice networks
In the near future Bluetooth will be embedded into many different types of mobile and portable devices. Initially this will provide simple wire replacement functions for applications such as hands-free headsets for cellular radio. However, this will also enable future picocellular services such as real-time voice and data. There are many possible applications for this such as telephone lounges in airports, shopping malls and other public places. We consider several Bluetooth-based telephony basestation (BS) designs. Since the number of SCO links per Bluetooth node is very limited, the designs consider the use of multiple overlapping Bluetooth basestations/chips. The first scheme is a direct implementation of the telephony profile where the Bluetooth basestations operate independently, without any coordination. When a mobile comes within range of the system, it associates with a basestation using the normal inquiry/page process. The second scheme, BBSM (Bluetooth basestation with migration), reduces the probability of blocking by having mobile nodes re-associate with available basestations when their current basestation is about to become blocked by SCO links. This improves the performance of the system from a blocking standpoint, but can be very spectrally wasteful. The third design, BBSS (Bluetooth basestation with standby), further improves blocking performance and decreases the wasteful effects of "node migration storms" which can occur in BBSM. We also include results for a design which uses ACL-based voice links. This scheme gives the best performance but has the disadvantage that more complex vocoding is required.
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