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Multi-jump voice transmission method based on Bluetooth technology

A voice transmission and Bluetooth technology, which is applied in transmission systems, near-field transmission systems, telephone communications, etc., can solve problems such as inability to communicate, limited number of voice links carried by Bluetooth, and decline in Bluetooth transmission distance and transmission rate. Application range, the effect of increasing the communication distance

Inactive Publication Date: 2008-02-20
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] ① Bluetooth transmission distance is limited
In the presence of obstacles, the transmission distance and transmission rate of Bluetooth will be greatly reduced, and may even fail to communicate
[0008] ②The number of voice links carried by Bluetooth is limited

Method used

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  • Multi-jump voice transmission method based on Bluetooth technology
  • Multi-jump voice transmission method based on Bluetooth technology
  • Multi-jump voice transmission method based on Bluetooth technology

Examples

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Embodiment 1

[0077] Embodiment 1: The inventor provides a specific example to support the feasibility of the present invention.

[0078] 1) Software and hardware configuration

[0079] In this embodiment, the hardware block diagram of the Bluetooth node is shown in FIG. 2 . The bluetooth adopts the DFBM-CF121 module of DETA company, and the firmware below the host control interface layer (Host Control Interface, HCI) of bc02 is programmed in the bluetooth chip. The host computer is a PC, and its Linux installation version is Redhat2.4.20-8. The Bluetooth protocol stack above the HCI layer runs on the PC, using the open source Bluetooth protocol stack BlueZ, and its installed version is bluez-libs-2.3-3, bluez-utils-2.2-3, bluez-libs-devel-2.3-3 . RTP / RTCP uses the open source jrtplib library, and its installed version is jrtplib3.6.0. The sound card model of the PC is VT8233 AC97 Audio Controller. The analog voice digitization and voice playback programming uses the open source OSS li...

Embodiment 2

[0095] Embodiment 2: The inventor provides an application model to expand the scope of application of the present invention.

[0096] As shown in Figure 8, it is an extended application model of multi-hop voice transmission based on Bluetooth technology, in which multiple Bluetooth multi-hop links can be connected to the Internet or GPRS through the gateway, so as to realize the connection between the Bluetooth multi-hop link and the Internet and GPRS Convergence, that is, the end node in the Bluetooth multi-hop link can communicate with any node in the Internet or GPRS network. Since the Bluetooth multi-hop link provides support for IP, as long as the gateway is modified to connect to other IP networks, the integration of the Bluetooth multi-hop link and other IP networks can be realized.

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Abstract

The utility model discloses a multi-hop voice transmission method which is used for widening Bluetooth application range based on Bluetooth technology, which belongs to regional wireless interconnected communication technical field. Based on open source Bluetooth protocol stack BlueZ, the utility model puts forward an implementation scheme of distribution type and loop-free route Bluetooth multi-hop link which is driven according to requirements and carries IP; the utility model designs a distribution type path discovery algorithm which suits for realization between the Bluetooth logic link control and an adaptation layer; at the same time, a method of realizing bidirectional voice communication on the Bluetooth multi-hop link is put forward by combining voice processing and transmission technology. The utility model greatly increases Bluetooth communication distance and can solve the problem of communication barrier through increasing a Bluetooth communication node; at the same time, the utility model increases link numbers of Bluetooth carry voice, each Bluetooth can support seven activated IP voice links at most and also can make voice multi cast and broadcasting; additionally, the Bluetooth multi-hop link can be fused with other IP network because of the ability of carrying IP.

Description

technical field [0001] The invention relates to a method for expanding the application range of bluetooth, and belongs to the technical field of regional wireless interconnection communication. Background technique [0002] Bluetooth is a short-range wireless communication technology used to replace cable connections between digital devices and computer peripherals and to realize wireless networking between digital devices. The original intention of Bluetooth design is to use a miniaturized, low-cost and micro-power wireless communication technology to construct a Personal Area Network (PAN), so that various mobile or fixed devices within the coverage of the PAN can realize Resource Sharing. [0003] In order to better promote the application of Bluetooth technology, Ericsson, Nokia, Toshiba, IBM and Intel established the Bluetooth Special Interest Group (SIG) in 1998 to be responsible for formulating Bluetooth specifications. Bluetooth devices work in the Industry Science...

Claims

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Application Information

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IPC IPC(8): H04B5/00H04L12/28H04L29/08H04M7/00
Inventor 沈连丰张剑宋铁成夏玮玮胡静许波
Owner SOUTHEAST UNIV
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