Link adaptive adjustment system, method, apparatus and base station
A link adaptation and adjustment system technology, applied in the field of link adaptation adjustment system, can solve the problems affecting the link adaptation adjustment effect, AMC inertial lag, etc., so as to reduce the link adaptation adjustment time and solve the inertial lag characteristics, the effect of eliminating channel quality variation
Active Publication Date: 2022-07-29
COMBA TELECOM SYST CHINA LTD
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[0006] Combine AMC with Hybrid Automatic Repeat (HARQ) technology to achieve better link adaptation effect, which is widely used in HSDPA (High Speed Downlink Packet Access); however, in the implementation process , the inventors found that there are at least the following problems in the traditional technology: the traditional feedback control method is mostly used for link adaptive control, but the AMC based on feedback control has inertial hysteresis characteristics, and this process hysteresis will inevitably affect the link adaptive adjustment effect
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[0053] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, but not to limit the present application.
[0054] Most of the traditional technologies are based on the feedback control method for link adaptive control. The disadvantage of this method is that when disturbance occurs in the channel, the terminal UE actively or passively feeds back the channel communication quality status, and the base station BS will adjust the transmission modulation. There may even be multiple adjustments due to the requirements of BLER, and the lag of this process will inevitably affect the use of users. For example, the traditional technology proposes an adaptive adjustment method based o...
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The present application relates to a link adaptive adjustment system, method, apparatus and base station. Among them, in the link adaptive adjustment system, the AMC feedback controller uses the closed-loop control algorithm to process the CSI information according to the control target, obtains the feedback control output result, and transmits the feedback control output result to the execution device; the AMC feedforward controller adopts the feedforward control method. The compensation algorithm processes the interference information, obtains the output of the feedforward control, and transmits the output of the feedforward control to the execution device; the execution device will based on the output of the feedback control and the output of the feedforward control, the determined link adaptation parameters and the resource allocation scheme , the wireless channel transmitted to the terminal through the antenna port. The present application implements AMC adaptive control based on feedforward-feedback, reduces link adaptive adjustment time, and meets user requirements for transmission rate and transmission stability under different channel conditions.
Description
technical field [0001] The present application relates to the field of wireless communication technologies, and in particular, to a link adaptive adjustment system, method, apparatus and base station. Background technique [0002] With the improvement of people's requirements for wireless network performance and data rate, the next generation mobile communication system needs to have smaller delay, larger system capacity, higher data rate and lower cost. However, in the wireless environment, the relative motion between the terminal (UE, User Equipment), the reflector and the scatterer or just the slight change of the transmission medium may have a great impact on the wireless channel, due to the time-varying characteristics of the wireless channel. and fading characteristics, the quality of the signal received by the terminal also changes with the change of the wireless channel condition, how to effectively utilize the variability of the wireless channel, and how to maximize...
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IPC IPC(8): G05B13/04
CPCG05B13/042
Inventor 吴世亮黄勇吴伟锋
Owner COMBA TELECOM SYST CHINA LTD