Rate adaptive selection method for time-varying channel

A rate-adaptive, time-varying channel technology, applied in the direction of adjusting the transmission rate, transmission path sub-channel allocation, signaling allocation, etc., can solve the problem that the optimal transmission rate cannot be found quickly

Active Publication Date: 2020-04-21
南京海骅信息技术有限公司
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Problems solved by technology

This method cannot quickly find the optimal sending rate, especially in the face of many available rates or rapidly changing channels

Method used

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  • Rate adaptive selection method for time-varying channel
  • Rate adaptive selection method for time-varying channel
  • Rate adaptive selection method for time-varying channel

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Embodiment Construction

[0040] The technical content of the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0041]The rate self-adaptive selection method provided by the present invention is used for constantly changing channels, and the sending station uses the existing channel state information to select an appropriate sending rate to send data packets to the receiving station. In addition, the received signal strength indication information and confirmation character / negation character information fed back by the physical layer and the medium access control layer are used simultaneously to track the change of the channel. Wherein, the sending station generally refers to a base station. The receiving station generally refers to wireless communication terminals such as mobile phones and tablet computers used by the user. The user transmits data alternately through the antenna built in the mobile phone and tablet co...

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Abstract

The invention discloses a rate adaptive selection method for a time-varying channel. The rate adaptive selection method comprises the following steps: S1, selecting a proper sending rate according toinitial channel interaction information to start sending a data packet to a receiving station; S2, receiving acknowledgement character/denial character information fed back by the receiving station, and measuring to obtain received signal strength indication information; S3, updating the relationship between the received signal strength indication information and the sending rate according to thefed-back acknowledgement character/denial character information; and S4, according to the measured received signal strength indication information and the relationship between the updated signal strength indication information and the sending rate, selecting the sending rate of sending the data packet to the receiving station in the next time slot. According to the rate adaptive selection method,the sending rate can be adjusted in a self-adaptive manner when the sending station sends the data packet to the receiving station, and the optimal sending rate can be selected at each moment.

Description

technical field [0001] The invention relates to a rate adaptive selection method for time-varying channels (hereinafter referred to as the rate adaptive selection method), which belongs to the technical field of wireless communication. Background technique [0002] In wireless communication systems, high throughput has always been an essential indicator. The sending station needs to accurately obtain channel state information (Channel State Information, CSI) to select an appropriate sending rate to achieve maximum throughput. However, it is not realistic to obtain timely and accurate channel state information feedback in the actual system. The sending station needs to use the existing channel state information to select the appropriate transmission rate to achieve the maximum throughput. This method is called the rate adaptive selection algorithm (Rate Adaptation, RA). [0003] The rate adaptive selection algorithm should use available information about the channel to accu...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/00H04L5/00
CPCH04L1/0002H04L1/0026H04L5/0055
Inventor 钱骅王海峰金圣峣
Owner 南京海骅信息技术有限公司
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