Quality of service (QoS) aware self-adaptive bandwidth distribution system for wireless-optical broadband access networks (WOBAN) and self-adaptive bandwidth distribution method

An adaptive bandwidth and distribution system technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve the problems of inability to meet service quality requirements of different priority services, single network performance goals, etc., and achieve good network service performance, Achieve smooth transition and transmission, avoid bandwidth hunger effect

Inactive Publication Date: 2012-07-11
ZHEJIANG UNIV OF TECH
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  • Application Information

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Problems solved by technology

[0006] In order to realize an efficient bandwidth allocation mechanism suitable for WOBAN, and at the same time overcome the shortcomings of the existing literature that the network performance target is too single and cannot meet the service quality requirements of different priority services, and improve the service of the entire hybrid access network Performance, the present invention proposes a QoS-aware adaptive bandwidth allocation system and method in WOBAN

Method used

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  • Quality of service (QoS) aware self-adaptive bandwidth distribution system for wireless-optical broadband access networks (WOBAN) and self-adaptive bandwidth distribution method
  • Quality of service (QoS) aware self-adaptive bandwidth distribution system for wireless-optical broadband access networks (WOBAN) and self-adaptive bandwidth distribution method
  • Quality of service (QoS) aware self-adaptive bandwidth distribution system for wireless-optical broadband access networks (WOBAN) and self-adaptive bandwidth distribution method

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Embodiment 1

[0046] refer to Figure 1 to Figure 5 , a QoS-aware adaptive bandwidth allocation system for WOBAN. In the WOBAN system, the network backend can be regarded as an EPON network, which includes an optical line terminal OLT and N convergent equipment OBF. The uplink and downlink transmission rates of the network are both R, and the network polling period is T cycle , the guaranteed time between two adjacent OBF transmission slots is T g , it can be seen that the available bandwidth of the entire network BW total For: BW total =(T cycle -N×T g )×R / 8.

[0047] In the WOBAN system, the front end of the network can be regarded as multiple WiMAX wireless subnets. For a wireless subnet, it includes: 1 converged device OBF and the N network controlled by the converged device OBF. SS a user terminal SS.

[0048] In a multi-type service environment, the service types carried by the EPON network are arranged in descending order of priority: expedited forwarding (EF) services, guaran...

Embodiment 2

[0073] refer to Figure 6 and Figure 7 , a QoS-aware based adaptive bandwidth allocation method in a wireless-fiber hybrid broadband access network, the bandwidth allocation method is a hierarchically implemented bandwidth allocation method. Specifically, the bandwidth allocation method is divided into a two-layer implementation method: first, in the optical line terminal OLT, the first-level bandwidth allocation method is used to calculate and determine the bandwidth authorization amount of each converged device OBF; secondly, in In a certain converged device OBF, the second-level bandwidth allocation method is used to calculate and determine the bandwidth authorization amount of each user terminal SS controlled by the OBF.

[0074] Figure 6 It is a schematic flow chart of the first-level bandwidth allocation method located in the optical line terminal equipment OLT in the present invention, and it is also figure 2 A flow chart of the bandwidth allocation algorithm of t...

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Abstract

A quality of service (QoS) aware self-adaptive bandwidth distribution system for wireless-optical broadband access networks (WOBAN) comprises optical line terminal devices, optical network unit, function integrating devices of wireless stations (BSs) and user terminals. The optical line terminal devices are respectively connected with a plurality of the function integrating devices through a light distribution network, and the plurality of the function integrating devices are covered at a plurality of user terminals within a governance range through a wireless network. The optical line terminal devices are used for distributing bandwidths to optical branching filters (OBFs) and wireless sub-networks governed by the OBFs. The function integrating devices are used for distributing bandwidths to user terminals governed by the OBFs according to business types at different priority levels and achieve smooth transition and transmission of data or business between optical fiber domains and wireless domains. A self-adaptive bandwidth distribution method is provided. The QoS aware self-adaptive bandwidth distribution system for the WOBAN and the self-adaptive bandwidth distribution method reasonably distribute and dispatch bandwidth resources according to bandwidth request information of users and server priority levels of different request business.

Description

technical field [0001] The invention belongs to the technical field of wireless-fiber hybrid broadband access network (WOBAN), and in particular relates to a dynamic bandwidth allocation system and method in WOBAN. Background technique [0002] As users' demands for bandwidth-sensitive applications continue to increase, it is imperative to design a new type of access network architecture with high bandwidth availability and flexibility. The proposal of Wireless-Fiber Hybrid Broadband Access Network (WOBAN) is a reasonable and feasible solution. [0003] WOBAN is formed by the fusion of a passive optical network (which can refer to any standard such as EPON or GPON) and multiple wireless mesh networks (which can refer to any wireless local area network such as WiFi, WiMAX or WLAN) access network solutions. The back end of WOBAN adopts a wired PON network structure. Taking the EPON standard as an example, the EPON network consists of an optical line terminal (OLT), an optic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/56H04W72/04H04L12/753
Inventor 付明磊乐孜纯蒋玲
Owner ZHEJIANG UNIV OF TECH
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