WiMAX system up band width dynanic distributing method

A bandwidth allocation method and bandwidth technology, applied in transmission systems, digital transmission systems, electrical components, etc., can solve problems such as waste of bandwidth resources, collisions, request failures, etc., and achieve the effect of improving transmission efficiency and MAC performance

Active Publication Date: 2007-03-28
武汉烽合智达信息技术有限责任公司
View PDF0 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, when the SS does not need to send a bandwidth request message, this method wastes bandwidth resources; and if the allocated bandwidth corresponds to Multicast CID or Broadcast CID, it is expressed as multicast or broadcast polling. At this time, the BS allocated The uplink bandwidth is shared by multiple SSs, and multiple SSs can send requests at the same time, so it will cause competition, which may cause collisions and invalidate the requests, as shown in Figure 1
The size of the probability of magnetic collision is related to the size of the contention request bandwidth allocated by th

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • WiMAX system up band width dynanic distributing method
  • WiMAX system up band width dynanic distributing method
  • WiMAX system up band width dynanic distributing method

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0042] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0043] Figure 4 is a schematic diagram of the bandwidth allocation of the uplink subframe of the WiMAX system, where B is the total uplink bandwidth, and B fix，i It is the bandwidth provided for contention ranging, UGS, rtPS and other periodic allocations in the i-th frame, B contention，i The bandwidth size is requested for the contention allocated in the i-th frame. The remaining bandwidth in the uplink subframe is used to transmit nrtPS and BE data packets, and its size is B data，i =B-B fix，i -B contention，i .

[0044] According to the algorithm flowchart given in Figure 3, the specific implementation process is detailed as follows:

[0045] (1) Specify that rtPS services can only request bandwidth in the unicast polling opportunities provided, while nrtPS and BE services can only request bandwidth in a competitive, piggyback, and Bandwidth st...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates a dynamic allocating method of uplink bandwidth of WiMAX system, comprising: firstly analyzing the relationship between collision probability, competition service stream number and competition bandwidth size of the cutoff binary index retreating algorithm, and determining the initial size of competition request bandwidth of uplink subframe of WiMAX system; then according to the allocating result, data packet arrival condition, and bandwidth request mode of the previous frame, real-timely and dynamically regulating the competition request bandwidth, and nrtPS and BE data transmission bandwidth size of the uplink subframe; in the regulating course, able to make congestion control of the request according to the number of requests which has been received by BS end but do not obtain bandwidths and the request-allowed maximum delay time, to receive or refuse a new request. And the method can effectively reduce bandwidth request collision probability, raise system transmission efficiency, improve MAC layer performance on different flow load conditions, and to a certain extent, make network congestion control, and it is an effective and practical allocating method.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to the allocation of uplink bandwidth in a WiMAX system. Background technique [0002] The 802.16 standard mainly defines the physical layer and MAC layer of the WiMAX system in detail. The standard supports three duplex modes: time division duplex (TDD), frequency division duplex (FDD) and half frequency division duplex (HFDD). Since the TDD mode does not require symmetrical frequency bands, and the division of uplink and downlink subframes in each frame can be dynamically adjusted, it has been widely used. In addition, the standard supports two networking methods, point-to-multipoint (PMP) and mesh network (Mesh), but only the PMP method is widely used. [0003] In the WiMAX system, each user station SS shares the uplink channel bandwidth in TDMA mode through DAMA, and the SS submits a bandwidth application (except for the UGS scheduling type that is actively grant...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04L12/56H04L12/403H04L29/06H04L12/24
Inventor 胡建武吴永东郭华志余重秀徐大雄
Owner 武汉烽合智达信息技术有限责任公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap