Downlink dispatching method for WiMAX system

A scheduling method and momentum technology, applied in network traffic/resource management, electrical components, wireless communication, etc., can solve problems such as not guaranteeing real-time service delay requirements, and can not meet real-time service delay requirements, so as to improve system throughput , improve utilization, and ensure the effect of bandwidth requirements

Inactive Publication Date: 2009-09-23
NINGBO UNIV +1
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AI Technical Summary

Problems solved by technology

However, the Opp.fair algorithm has no measures to guarantee the delay requirements of real-time services, so it cannot meet the delay requirements of real-time services

Method used

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  • Downlink dispatching method for WiMAX system
  • Downlink dispatching method for WiMAX system
  • Downlink dispatching method for WiMAX system

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Embodiment Construction

[0018] Combine below figure 1 The present invention is described in further detail:

[0019] In step (1), the "momentum" parameter is generated according to the different delay requirements of each service flow and the different channel conditions of each user, and this parameter is generated by the "momentum" generation module. The "momentum" generation module is divided into a waiting time weight generation sub-block and a transmission rate estimation sub-block to generate the delay weight and the channel condition weight respectively, and multiply the two to generate the "momentum" parameter.

[0020] In order to meet the delay requirements of real-time services, the weight of delay is introduced. The greater the queuing time of the service flow, the higher the weight of bandwidth allocation. Defining the delay weight f of the service flow queue j =exp(γ j × d j ). where d j is the waiting time of service flow j in the queue buffer, γ j is the business priority param...

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Abstract

The invention relates to a WiMAX downlink dispatching method which is characterized by comprising the following five steps sequentially of: (1) generating a 'momentum' parameter according to different time-delay requirements of each business flow and different channel situations of each user; (2) storing the generated 'momentum' parameter in a 'momentum' parameter buffer memory in BS; (3) ranking the 'momentum' parameter in the 'momentum' parameter buffer memory according to a descending order, and dispatching the corresponding business flow according to the ranking order, thus forming a WiMAX frame; (4) carrying out 'momentum' updating, and storing the updated 'momentum' parameter in a 'momentum' buffer memory together with the newly formed 'momentum' parameter; and (5) circulating the steps (1) to (4), thus forming a new WiMAX frame. The method not only can meet the time-delay requirement of real-time services, but also can consider the system throughput simultaneously, furthermore, the calculation is simple, and the computation workload is light.

Description

Technical field: [0001] The invention relates to the technical field of wireless broadband, in particular to a downlink scheduling method of a WiMAX system. Background technique: [0002] Worldwide Interoperability for Microwave Access (WiMAX) can provide a low-cost, high-efficiency wireless access solution. WiMAX technology has barrier-free long-distance (up to 50 kilometers) large-capacity (up to 15Mbps) wireless data transmission function, which can be used for large-capacity data collection and long-distance wireless broadband transmission in field operations, earthquakes, forest fire prevention, and river and lake floods. Emergency system deployment for emergencies, real-time audio and video collection, and last-mile wireless broadband access for homes and businesses have huge market demands. [0003] In the WiMAX wireless broadband network, scheduling is the key to guarantee the quality of service (QoS), and plays an important role in improving the utilization of netw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W28/14H04W28/24H04W72/12H04W84/12
Inventor 何加铭邢海涛封福东张青波
Owner NINGBO UNIV
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