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
CN1937583AActive Publication Date: 2007-03-28武汉烽合智达信息技术有限责任公司
0 Cites 9 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
武汉烽合智达信息技术有限责任公司
Publication Date
2007-03-28

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

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.
Need to check novelty before this filing date? Find Prior Art

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