On-demand downlink channel allocation method for ofdm base station system

A base station system, on-demand allocation technology, applied in multi-frequency code systems, wireless communications, electrical components, etc., can solve the problems of unable to achieve optimal performance, less prior information, unable to achieve orderly allocation of resources, etc. Reasonable allocation on demand, good downlink throughput, and maximized utilization

Active Publication Date: 2018-01-19
GUANGZHOU HAIGE COMM GRP INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, some existing resource dynamic allocation algorithms, such as various forms of proportional fairness algorithms, only consider the current channel state of each user, and there is too little prior information, so the orderly allocation of resources cannot be realized, and the performance cannot reach the optimal level. Excellent, unable to support the service quality requirements of more and more different businesses
[0004] Some traditional wireless resource scheduling algorithms, such as various forms of proportional fairness algorithms, start from the compromise between allocation efficiency and fairness, and can only achieve the rate convergence of different users, but cannot support the different service rate requirements of multiple users. on-demand

Method used

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  • On-demand downlink channel allocation method for ofdm base station system
  • On-demand downlink channel allocation method for ofdm base station system
  • On-demand downlink channel allocation method for ofdm base station system

Examples

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Embodiment 1

[0058] The method for allocating downlink channels on demand in this embodiment specifically includes the following steps:

[0059] 1) Let the signal transmission power of the base station be P max , each sub-channel is composed of a group of continuous sub-carriers with the same number, the number of sub-channels is L, the bandwidth of each sub-channel is B Hz, and its label is 1~L, and it is stipulated that a sub-channel can only be assigned to It is used by one user, and the transmit power is evenly distributed on all subcarriers. The base station system can obtain the channel state information (CSI) of the user on each sub-channel in real time, and the number is N=2 k ), and adopt adaptive modulation and coding technology on each basic time-frequency resource scheduling block whose time is T, such as figure 1 As shown, according to the channel state information CSI on each sub-channel, different modulation and coding schemes (MCS, total N=2 k schemes, the spectrum utili...

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PUM

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Abstract

The invention discloses a method for allocating downlink channels on demand for an OFDM base station system. The method includes prior information acquisition, service control, user priority sorting, and channel allocation strategy formulation. The method of the invention can make the downlink throughput of the base station approach the downlink capacity, which not only supports the business needs of more users, but also provides different quality of service guarantees for different services of multiple users, and realizes the maximum utilization and utilization of wireless resources to a certain extent. Reasonable allocation according to needs, while maximizing the downlink throughput of the base station, better support the quality of service requirements of different services of different users, which has high value in theory and practical application.

Description

technical field [0001] The invention relates to a method for allocating downlink channels, in particular to a method for allocating downlink channels on demand for an OFDM base station system. It belongs to the technical field of wireless digital communication. Background technique [0002] Link adaptive transmission technology is to adaptively change parameters such as modulation mode, coding rate and power allocation according to channel changes, and use wireless link resources with the highest efficiency when transmission error performance is allowed. At present, civil 3G, 4G and WIMAX base station systems all support this technology and have formulated detailed standards for this technology. [0003] Based on the obtained user channel state information, the base station can use the time-varying characteristics of the wireless channel to allocate resources to users with better channel conditions, thereby effectively improving the actual throughput of the base station sys...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04W72/04
Inventor 谢映海刘勇
Owner GUANGZHOU HAIGE COMM GRP INC
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