DSAM (Dynamic Slot-time Allocation Method) of scale-extensible single-jump ad hoc network supporting QoS (Quality of Service)

A technology of dynamic time slots and allocation methods, applied in the field of wireless networks, can solve the problems of network channel bandwidth waste, inability to guarantee data service quality, and low network channel utilization

Inactive Publication Date: 2011-02-16
WUXI JUWEI TECH CO LTD
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Problems solved by technology

However, because a large amount of interactive control information between nodes will cause a huge waste of network channel bandwidth, the network channel utilization obta

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  • DSAM (Dynamic Slot-time Allocation Method) of scale-extensible single-jump ad hoc network supporting QoS (Quality of Service)
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  • DSAM (Dynamic Slot-time Allocation Method) of scale-extensible single-jump ad hoc network supporting QoS (Quality of Service)

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Embodiment Construction

[0029] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0030] In the following description, this specification abbreviates the QoS-supporting scalable single-hop adhoc network dynamic time slot allocation method proposed by the present invention as DSAM (Dynamic Slot-time Allocation Method). DSAM first sets the following network operating conditions:

[0031] 1. The network nodes work in the half-duplex state, that is, at the same time, the nodes can only send or receive signals, but cannot send and receive at the same time. The data transmission rate is 2Mbps, and the node transmission radius is 250m;

[0032] 2. All nodes in the network are within the single-hop transmission range, and only one pair of receiving / sending nodes is allowed to transmit data at the same time, otherwise it will cause data transmission conflicts;

[0033] 3. There are three priority services in the network. The size o...

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Abstract

The invention discloses a DSAM (Dynamic Slot-time Allocation Method) of scale-extensible single-jump ad hoc network supporting QoS (Quality of Service), comprising the following steps of: requiring total network nodes to complete broadcasting beacon frame in the process of networking initialization, judging whether each node in the network successfully receives the broadcasting beacon frame of remainder nodes or not by adopting a distributed manner, thereby obtaining sequentially ordered unique identifiers and the total quantity of the network nodes at networking initialization time. In the running process of the network, the time axis of the total network nodes are synchronously divided into a series of continuous network frames without fixed lengths, each node invokes data transmission within each network time frame, and the transmission process comprises four stages of node synchronization, time-slot requirement, time-slot allocation and data transmission; meanwhile, the method can effectively support a new node to access the network and a node to quit so as to meet the requirement of network scale dynamic extension. And the simulation experiment data in a wireless network simulation environment Qua1Net proves the validity of the method.

Description

technical field [0001] The invention belongs to the field of wireless networks, in particular to a QoS-supporting scalable single-hop ad hoc network dynamic time slot allocation method. Background technique [0002] Ad hoc network is a new type of wireless network. It consists of a series of fully equal mobile nodes without any fixed or preset network facilities. Each node in the network accesses the wireless channel under the control of the channel access control (Medium Access Control, MAC) protocol, so as to realize the sharing of information and services. Due to the fast, flexible and high reliability of networking, ad hoc networks have been widely used in environments where fixed communication infrastructure cannot be provided, such as field communications, emergency rescue and disaster relief, field expeditions, temporary meetings, etc. [0003] MAC protocol is the key content of ad hoc network protocol stack research. The protocol determines the usage of the shared...

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Application Information

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IPC IPC(8): H04W72/04H04W28/16H04W16/02
Inventor 雷磊蔡圣所周进华田加敏蔡维玲朱青
Owner WUXI JUWEI TECH CO LTD
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