Voice communication method based on mobile sensor network

A technology of voice communication and sensor network, which is applied in the field of voice communication of mobile sensor network, can solve the problems of unguaranteed voice packet delay, transmission rate of time delay and jitter, lack of pertinence, etc., so as to facilitate rapid establishment and avoid hiding Effect of terminal and exposed terminal, collision avoidance

Inactive Publication Date: 2008-10-22
JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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Problems solved by technology

[0003] A variety of MAC layer protocols based on scheduling access mechanisms such as Time Division Multiple Access (TDMA) and contention access mechanisms such as Carrier Sense Multiple Access (CSMA-CA) have been proposed specifically for wireless sensor networks. It is aimed at short-distance low-speed communication, lacks pertinence, and cannot guarantee QoS requirements such as voice packet delay, delay jitter, and transmission rate

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  • Voice communication method based on mobile sensor network
  • Voice communication method based on mobile sensor network
  • Voice communication method based on mobile sensor network

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Embodiment Construction

[0035] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0036] As shown in the figure, the present invention includes the following steps:

[0037] 1. Networking

[0038] The network adopts the TD mode and is built on the concept of a superframe. The superframe structure used in the embodiment is fixedly divided into a period of time as a beacon frame time slot, which is used to issue a synchronous beacon frame; the rest of the superframe period is equally divided into M parts , which are competitively used by the nodes in the cluster by means of CSMA. Each time slot is required to be sufficient to support the transmission of all voice packets buffered by a single node in one superframe period.

[0039] Before the network is established, all nodes are required to have a pre-set ID. The designated cluster head node ID is 1. The remaining node IDs are greater than 2. The available resources in the network...

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Abstract

The invention discloses a speech communication method based on a mobile wireless sensor network. The speech communication method comprises the following steps of network building, network maintenance and speech communication; in the network assembly step, a sensor node in the network appoints a cluster head according to a certain rule; the other nodes are totally cluster members; according to T time, the network is divided into a superframe which is inside provided with a beacon frame and a plurality of small time slots and used for the competition between nodes and the reserved data sending; in the network maintenance step, the node in the cluster head broadcasts a beacon frame in the whole network every N superframe cycles; the same strategy in assembling the network is used; all the nodes of the whole network pass through a monitoring channel and maintain own adjacent node tables according to the monitored information; in the speech communication step, the speech communication is carried out among the cluster members and between the cluster members and the node of the cluster head. The speech communication method is suitable for the mobile speech sensor network establishment, speech communication management and other aspects.

Description

technical field [0001] The invention belongs to the technical field of wireless sensor networks, in particular to a voice communication method of a mobile sensor network. Background technique [0002] With the rapid development and maturity of sensor technology, wireless communication technology, embedded computing technology, and distributed information processing technology, micro-sensors and networks with perception, computing, and communication capabilities have begun to appear on a large scale. Wireless sensor networks are widely used in military, environmental monitoring, medical and health, industrial automation, public security and other fields, and gradually develop from the initial low-rate data transmission to multimedia transmission such as voice transmission with higher Qos requirements. [0003] A variety of MAC layer protocols based on scheduling access mechanisms such as Time Division Multiple Access (TDMA) and contention access mechanisms such as Carrier Sen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/26H04L12/56H04L29/08H04L12/28H04L1/16H04L1/18H04W16/18H04W24/04H04W84/18
Inventor 吴明娟张帅沈杰
Owner JIAXING WIRELESS SENSOR NETWORKS CENT CAS
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