CN101964702A - Method and system for analyzing CQI (Channel Quality Indicator) feedback - Google Patents

Method and system for analyzing CQI (Channel Quality Indicator) feedback Download PDF

Info

Publication number
CN101964702A
CN101964702A CN2010105320934A CN201010532093A CN101964702A CN 101964702 A CN101964702 A CN 101964702A CN 2010105320934 A CN2010105320934 A CN 2010105320934A CN 201010532093 A CN201010532093 A CN 201010532093A CN 101964702 A CN101964702 A CN 101964702A
Authority
CN
China
Prior art keywords
cqi
time
feedback
determining
system
Prior art date
Application number
CN2010105320934A
Other languages
Chinese (zh)
Other versions
CN101964702B (en
Inventor
尚勇
陈晓华
Original Assignee
北京大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 北京大学 filed Critical 北京大学
Priority to CN 201010532093 priority Critical patent/CN101964702B/en
Publication of CN101964702A publication Critical patent/CN101964702A/en
Application granted granted Critical
Publication of CN101964702B publication Critical patent/CN101964702B/en

Links

Abstract

The invention discloses a method and a system for analyzing CQI (Channel Quality Indicator) feedback, wherein the method comprises the following steps of: determining a CQI consistent time of an LTE (Long Term Evolution) system, wherein the CQI consistent time is used for representing varying conditions of the CQI consistent time; analyzing the CQI feedback of the LTE system according to the CQI consistent time and determining CQI feedback and processing time delay, CQI feedback interval and CQI time change conditions in different periods of time; and judging the effectiveness and the reasonableness of the CQI feedback. Through determining the CQI consistent time, the basis of analyzing and judging the CQI feedback and processing time delay, the CQI feedback interval and the CQI time change conditions in any other period of time is provided, and furthermore, the waste of power resource, frequency resource and time resource can be favorably avoided.

Description

对CQI反馈进行分析的方法与系统 A method for CQI feedback analysis system

技术领域 FIELD

[0001] 本发明涉及LTE通信技术,尤其涉及一种对CQI反馈进行分析的方法与系统。 [0001] The present invention relates to LTE communication technique, particularly to a method for CQI feedback analysis system. 背景技术 Background technique

[0002] 在蜂窝通信系统中,用户接收到的信号质量取决于小区的信道质量、噪声水平和相邻小区的干扰水平。 [0002] In a cellular communication system, the user depends on the quality of the received signal quality of the channel interference level of a cell, the noise level and the adjacent cell. 在一定的发射功率下,为了优化系统的容量和覆盖,发射机的数据发送率要能够匹配UE接收到的信号质量,即在UE接收到的信号质量好的情况下多发送数据, 相反少发送数据。 At a certain transmission power, in order to optimize system capacity and coverage, data transmission rate of the transmitter can be matched to the received signal quality of the UE, i.e., the multi-transmission data in the UE receives a good signal quality, the less the opposite transmission data. 这是因为,低阶的调制编码方法能抗更高的干扰和噪声,但传输速率低; 而高阶的调制编码方法传输速率高,但对干扰和噪声比较敏感。 This is because the low-order modulation and coding method more resistant to interference and noise, but the transmission rate is low; high order modulation and coding method for the transmission rate is high, but more sensitive to interference and noise. 这种技术即被认作是基于自适应调制编码的链路自适应技术。 This technique i.e. regarded as adaptive modulation and coding-based link adaptation techniques.

[0003]在 LTE 通信系统中,eNodeB 根据UE 反馈的CQI (Channel Quality Indicator)来选择合适的调制方式和编码速率,以提高传输速率和系统的吞吐量。 [0003] In the LTE communication system, an eNodeB in accordance with CQI (Channel Quality Indicator) UE fed back to select the appropriate modulation scheme and coding rate, transmission rate and to increase throughput of the system. CQI是考虑到当前信道的信噪比水平和接收机的性能,从而给出的一种可支持的数据数率的指示。 Taking into account the level of CQI is a signal to noise performance of the receiver and the current channel, an indication of the supported data rate is given thereby. CQI上报从下行链路接收信号质量中获得,一般基于下行链路参考信号的测量。 Obtained from the downlink CQI reported by the received signal quality of the link, in general, based on the measured downlink reference signal. 需要注意的是,CQI并不是下行的SINR直接指示,而是UE报告的在当前信道和噪声条件下,可以保证传输误块率(BLER)不超过10%的最高MCS。 Note that, the CQI is not a direct indication of the SINR of the downlink, but the UE reports the current channel conditions and noise, can guarantee the transmission block error rate (BLER) is not more than 10% of the maximum MCS. 具体地,CQI的测量是UE根据某个PRB组的SINR测量值, 找出HARQ第1次传输能够达到BLER小于10%的最高MCS,然后反馈对应的CQI Index0 Specifically, the UE according to the CQI measured SINR measurement value of a PRB group, find the first HARQ transmissions reach the highest MCS BLER less than 10%, then the corresponding feedback CQI Index0

[0004] 需要注意的是,CQI的上行传输和eNodeB对CQI的处理都存着一定时延,这里将其总称为CQI反馈和处理时延。 [0004] Note that, the CQI and uplink transmission of the CQI process eNodeB have kept a certain time delay, here collectively referred to as CQI feedback and processing delay. 如果在CQI反馈和处理时延内,UE端的实际CQI发生了变化,就会使得eNodeB在进行链路自适应和调度时用到的CQI和当前时刻真实的CQI之间存在差别。 There is a difference between the real CQI used if the CQI feedback and the processing delays, the UE ends the actual CQI changes, will be performed so that the link adaptation and scheduling eNodeB CQI and the current time. 对于快衰落的信道或者接收端信噪比变化比较快的情形来说,UE很可能面对与之前上报时刻完全不同的信道条件。 For the case where the receiving side channel or SNR variation is relatively fast fading is fast, UE is likely to face the time before reporting a completely different channel conditions. 对于信道变好的情况,这将导致功率或频率资源的浪费, 而对于信道变坏的情况,很可能引发HARQ进程,从而导致时间资源的浪费。 For a channel change for the better case, this will result in a waste of power or frequency resources, and in the case of channel deterioration, is likely to lead to HARQ process, resulting in a waste of time resources. 因此,对于由于CQI反馈和处理时延所导致的问题必须给予重视。 Therefore, for the problems caused by CQI feedback and the processing delay caused must be given attention.

[0005] 另一方面,信道相干时间是描述信道时变特性的参数,它提供了信道因为移动端和基站之间的相对移动造成的信道时变的信息。 [0005] On the other hand, the channel coherence time is a parameter describing the varying characteristics of the channel, the channel because it provides information about the channel relative movement between the mobile terminal and the base station due to change. 在工程中,信道相干时间是由最大多普勒频移根据经验公式得出的,而最大多普勒频移由移动端的速度除以载波波长得到。 In engineering, channel coherence time by a maximum Doppler shift is obtained according to the empirical formula, the maximum Doppler shift from the moving speed of the terminal obtained by dividing the carrier wavelength. 即信道相干时间是由移动端的速度根据经验公式得到的。 I.e., the channel coherence time is obtained by the speed of the mobile terminal according to the empirical formula. 信道相干时间的定义暗示了两路间隔相干时间到达的信号将会受到信道不同的影响。 Define the channel coherence time it implies that the coherence time interval of two signals to reach different channels would be affected. 在LTE中,信道相干时间是导频在时域上设置的密度的重要依据。 In LTE, the channel coherence time is an important basis in the time domain pilot density setting. 但是信道相干时间作为一种描述信道变化快慢的度量,并不能有效的表达CQI时间序列的时变特性。 However, the channel coherence time as a measure of the speed of channel variation is described, and can not effectively time varying nature of the expression time series CQI. 因此,很难利用信道相干时间来判断CQI反馈与处理时延内CQI的变化情况以及确定合理的CQI反馈间隔。 Thus, using the channel coherence time is difficult to determine the change in the CQI with the CQI feedback and the processing delay to determine a reasonable CQI feedback interval.

发明内容 SUMMARY

[0006] 本发明的目的在于提供一种对CQI反馈进行分析的方法与系统,以解决由于CQI 反馈和处理时延所导致的问题。 [0006] The object of the present invention to provide a method and a system for the CQI feedback analysis to solve the problems due to the CQI feedback and the processing delay caused.

3[0007] 一方面,本发明一种对CQI反馈进行分析的方法,包括如下步骤:CQI —致时间确定步骤,确定LTE系统的CQI —致时间,所述CQI —致时间用于表征CQI时间变化的尺度; 分析步骤,依据所述CQI —致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况;判断步骤,对所述CQI反馈的有效性和合理性进行判断。 3 [0007] In one aspect, the CQI feedback method of the present invention is analyzed, comprising the steps of: CQI - actuation time determining step of determining the LTE system CQI - induced time, the CQI - used to characterize the actuation time period CQI scale change; analysis step, according to the CQI - actuation time of the LTE system, the CQI feedback is analyzed to determine the CQI feedback and the processing delay, and the CQI when the CQI feedback interval period becomes different circumstances; analyzing the step, for the CQI feedback is effective and reasonable judgment.

[0008] 上述对CQI反馈进行分析的方法,优选所述CQI —致时间确定步骤中,所述CQI — 致时间Tajra为满足在时段t内,CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值:TCQICT = max (t =P {CQI对应效率变化< M11时间内}彡R),其中,M、R根据具体的工程实际和需求来确定。 [0008] The CQI feedback method of analysis, the CQI is preferably - actuation time determining step, the CQI - Tajra actuation time T is satisfied within the time period, the corresponding efficiency CQI index change caused by a change occurs less than a threshold R M is a probability greater than or equal to the maximum value of t: TCQICT = max (t = P {CQI changes corresponding to the efficiency <M11 within time} San R), wherein, M, R is determined according to the specific requirements and engineering practice.

[0009] 另一方面,本发明一种对CQI反馈进行分析的系统,包括:CQI —致时间确定模块、 分析模块和判断模块。 [0009] In another aspect, the present invention is a kind of CQI feedback analysis system, comprising: CQI - actuation time determining module, an analysis module and a determining module. 其中,CQI —致时间确定模块用于确定LTE系统的CQI —致时间,所述CQI —致时间用于表征CQI时间变化的尺度;分析模块用于依据所述CQI —致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况;判断模块用于对所述CQI反馈的有效性和合理性进行判断。 Wherein, CQI - actuation time determining means for determining a CQI LTE system - induced time, the CQI - used to characterize the actuation time of the CQI time scale; means for analysis according to the CQI - induced time, the LTE CQI feedback system is analyzed to determine the CQI feedback and processing delays, and when the CQI of the CQI feedback period interval becomes different circumstances; means for determining the CQI feedback is effective and reasonable judgment.

[0010] 上述对CQI反馈进行分析的系统,优选所述CQI —致时间确定模块中,所述CQI — 致时间Tajra为满足在时段t内,CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值:TCQICT = max (t =P {CQI对应效率变化< M11时间内}彡R),其中,M、R根据具体的工程实际和需求来确定。 [0010] The CQI feedback analysis system, preferably the CQI - actuation time determining module, the CQI - Tajra actuation time T is satisfied within the time period, the corresponding efficiency CQI index change caused by a change occurs less than a threshold R M is a probability greater than or equal to the maximum value of t: TCQICT = max (t = P {CQI changes corresponding to the efficiency <M11 within time} San R), wherein, M, R is determined according to the specific requirements and engineering practice.

[0011] 本发明通过确定CQI —致时间,提供了分析和判断CQI反馈与处理时延、CQI反馈间隔以及其它任何时段内CQI时变情况的依据。 [0011] The present invention, by determining a CQI - actuation time, and provides analysis and processing delay is determined CQI feedback, CQI feedback interval based on the case where a CQI and variations within any other period. 进而,能够很好的避免功率资源、频率资源和时间资源的浪费。 Furthermore, very good to avoid power resources, a waste of frequency resources and time resources.

附图说明 BRIEF DESCRIPTION

[0012] 图1为本发明对CQI反馈进行分析的方法实施例的步骤流程图; Step embodiment of a method [0012] FIG. 1 of the present invention, a flow chart of analysis CQI feedback;

[0013] 图2为本发明对CQI反馈进行分析的系统实施例的结构示意图。 [0013] FIG. 2 CQI feedback system analysis schematic structural diagram of the embodiment of the present invention.

具体实施方式 Detailed ways

[0014] 为使本发明的上述目的、特征和优点能够更加明显易懂,下面结合附图和具体实施方式对本发明作进一步详细的说明。 [0014] For the above-described objects, features and advantages of the invention more apparent, the accompanying drawings and the following specific embodiments of the present invention will be further described in detail.

[0015] 参照图1,图1为本发明对CQI反馈进行分析的方法的步骤流程图,包括如下步骤: CQI 一致时间确定步骤S110,确定LTE系统的CQI —致时间,所述CQI —致时间用于表征CQI时间变化的尺度;分析步骤S120,依据所述CQI —致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况; 判断步骤S130,对所述CQI反馈的有效性和合理性进行判断。 Step [0015] Referring to FIG. 1, FIG. 1 is a CQI feedback method of the invention. FIG analysis, comprising the steps of: CQI same time determining step S110, the system determines the LTE CQI - actuation time, the CQI - actuation time CQI for characterizing time scale; analysis step S120, the based on the CQI - actuation time of the LTE system, the CQI feedback is analyzed to determine the CQI feedback and processing delays, different time interval and the CQI feedback CQI time varying circumstances; determination step S130, the CQI feedback for the judgment is effective and reasonable.

[0016] 下面对该实施例做出详细的说明。 [0016] the following detailed description of embodiments made.

[0017] 信道相干时间是比较大的,特别是当UE的移动速度较低(如多普勒频移为5Hz) 时。 [0017] The channel coherence time is relatively large, especially when the moving speed of the UE is low (e.g. Doppler shift is 5Hz) time. 但是,通过仿真,很容易发现即便在低速移动的情况下,CQI发生变化的时间尺度也远比信道相干时间要来得小。 However, through simulation, it is easy to find even in the case where the time scale of the low-speed movement, the CQI is also changed than the coherence time of the channel to be more small. 同时,也能发现,CQI发生变化的时间尺度除了与移动端的速度有关外,与信道噪声(或信号)的能量大小也有关,在不同的信噪比下,CQI序列表现出不 At the same time, can be found, the time scale is changed in addition to CQI related to the moving speed of the outer end, and channel noise (or signal) is also related to the amount of energy in different SNR, CQI exhibit no sequence

4同的变化快慢。 4 with the speed of change. 除此之外,CQI序列变化的时间尺度也与CQI的测量带宽以及系统所使用的天线模式有关。 In addition, sequence variation CQI is also related to the time scale of the antenna pattern and the CQI measurement bandwidth used by the system. 因此,仅仅使用信道相干时间的概念进行分析显然是不够的,有必要定义一个表征CQI时间变化尺度的量,我们将它称作“CQI —致时间”,并且给出了CQI —致时间的定义。 Thus, the concept of using only the channel coherence time for analysis is clearly not enough, it is necessary to define a change in the amount of CQI time scale characterization, it will be referred to as "CQI - actuation time", and gives the CQI - induced defined time .

[0018] CQI—致时间的定义: [0018] CQI- induced defined time:

[0019] 满足在时段t内,CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值,即 [0019] satisfied within the time period t, the efficiency of the CQI index corresponding changes caused by changes less than a threshold probability of occurrence of M is not less than the maximum value of R t, i.e.,

[0020] Tcqict = max (t =P {CQI 对应效率变化< M11 时间内}彡R) [0020] Tcqict = max (t = P {CQI changes corresponding to the Efficiency <M11 within time} San R)

[0021] 其中Tcqict即代表CQI —致时间(CQI Coherence Time),CQI索引对应的效率如表3最后一列所示,实际为每个RE所承载的信息比特。 [0021] wherein Tcqict which represents the CQI - actuation time (CQI Coherence Time), CQI index corresponding to the efficiency of the last column of Table 3, the actual information bit carried by each RE. 定义当中的M和R可以根据具体的工程实际和需求来确定。 M and R are defined among can be determined according to the specific requirements and engineering practice.

[0022] 有了CQI —致时间的概念,就可以使用其对CQI反馈的一些问题进行分析。 [0022] With CQI - induced concept of time, which can be used to analyze the CQI feedback problems. 对于CQI反馈和处理时延,当CQI反馈和处理时延小于CQI —致时间时,可以认为CQI反馈和处理时延内CQI变化所引起的效率的变化以大于概率R的可能性小于等于M。 And processing delay for the CQI feedback, and CQI feedback when the processing delay is less than the CQI - upon actuation time can be considered to change the CQI feedback and the processing delay caused by a change in CQI is greater than the efficiency of R is less than the likelihood of a probability equal to M. 而当CQI反馈和处理时延大于CQI —致时间时,由于时延可能带来的CQI变化所引起的效率的变化大于M的可能性大于R。 When processing delay is greater than the CQI feedback, and CQI - the possibility of time when activated, since the CQI change delay variation caused by the potential efficiency greater than M is greater than R. 对于CQI反馈间隔,有类似的结论。 For CQI feedback interval, a similar conclusion.

[0023] 本发明的技术效果在于:通过本发明定义的CQI —致时间的概念,提供了分析和判断CQI反馈与处理时延和CQI反馈间隔以及其它任何时段内CQI时变情况的依据。 [0023] A technical effect of the present invention: The present invention is defined by the CQI - induced concept of time, and provides an analytical basis for determining the CQI when CQI feedback and CQI feedback with the processing delays, and any other time intervals varying circumstances.

[0024] 在一个实施例中,设定R = 50%,M = 0. 4,这样CQI —致时间的定义即为在时段t 内,CQI索引发生变化所引起的相应效率的变化小于0. 4的概率大于50%的最大t值。 [0024] In one embodiment, the set R = 50%, M = 0. 4, so that CQI - definition of efficiency corresponding changes induced within a time period is the time t, CQI index changes due to less than 0. 4 is greater than 50% probability that the maximum value of t.

[0025] 通过仿真可以算出在这种设定时,特定仿真条件下的CQI —致时间,如下 When [0025] In such a setting can be calculated through the simulation, the CQI under specific simulation conditions - actuation time, as follows

[0026] 表1仿真条件:带宽1. 4M/6RB信道EPedA5Hz单天线模式下的CQI —致时间 [0026] TABLE 1 simulation conditions: the bandwidth of 1. 4M / 6RB CQI channel in the single antenna mode EPedA5Hz - induced time

[0027] [0027]

Figure CN101964702AD00051

[0028] 表2仿真条件:带宽1. 4M/6RB信道EVehA70Hz单天线模式下的CQI —致时间 [0028] Table 2 simulation conditions: the bandwidth of 1. 4M / 6RB CQI channel in the single antenna mode EVehA70Hz - induced time

Figure CN101964702AD00052

[0030] 表3CQI索引与调制与编码方式以及效率的对应表[0031] [0030] Table 3CQI modulation and coding scheme index and the efficiency of the correspondence table [0031]

CQI索引 调制 编码率χ 1024 I效率(每符号承载的信息比特) 0 (无) 1 QPSK 78 0.15232 QPSK 120 0.23443 QPSK 193 0.37704 QPSK 308 0.60165 QPSK 449 0.87706 QPSK 602 1.17587 16QAM 378 1.47668 16QAM 490 1.91419 16QAM 616 2.406310 64QAM 466 2.730511 64QAM 567 3.322312 64QAM 666 3.902313 64QAM 772 4.523414 64QAM 873 5.115215 64QAM 948 5.5547 CQI index modulation coding rate χ 1024 I efficiency (per symbol carries information bits) 0 (None) 1 QPSK 78 0.15232 QPSK 120 0.23443 QPSK 193 0.37704 QPSK 308 0.60165 QPSK 449 0.87706 QPSK 602 1.17587 16QAM 378 1.47668 16QAM 490 1.91419 16QAM 616 2.406310 64QAM 466 2.730511 64QAM 567 3.322312 64QAM 666 3.902313 64QAM 772 4.523414 64QAM 873 5.115215 64QAM 948 5.5547

[0032] 另一方面,本发明还提供了一种对CQI反馈进行分析的系统的实施例,参照图2, 该系统包括:CQI —致时间确定模块20分析模块22和判断模块24。 [0032] another aspect, the present invention further provides for an embodiment of a CQI feedback analysis system, with reference to FIG. 2, the system comprising: CQI - actuation time determining module 20 determines an analysis module 22 and module 24. 其中: among them:

[0033] CQI 一致时间确定模块20,用于确定LTE系统的CQI —致时间,所述CQI —致时间用于表征CQI时间变化的尺度;分析模块22,用于依据所述CQI —致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况;判断模块24,用于对所述CQI反馈的有效性和合理性进行判断。 [0033] CQI same time determining module 20, the LTE system for determining a CQI - actuation time, the CQI - used to characterize the actuation time of the CQI time scale; analysis module 22, according to the CQI - actuation time, the LTE system, the CQI feedback is analyzed, and feedback the CQI determination processing delay, and the CQI when the CQI feedback interval period becomes different circumstances; determining module 24, for the CQI feedback and reasonable effectiveness sex judgment.

[0034] 其中,所述CQI —致时间确定模块中,所述CQI —致时间Tqjict为满足在时段t内, CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值: [0034] wherein the CQI - actuation time determining module, the CQI - actuation time period in order to meet Tqjict t, CQI index corresponding to the efficiency change caused by changes in the probability of occurrence of M is less than a threshold greater than or equal to the maximum R t values:

[0035] Tcqict = max (t =P {CQI 对应效率变化< M11 时间内}彡R), [0035] Tcqict = max (t = P {CQI changes corresponding to the Efficiency <M11 within time} San R),

[0036] M、R根据具体的工程实际和需求来确定。 [0036] M, R is determined according to the specific requirements and engineering practice.

[0037] 需要说明的是,对CQI反馈进行分析的系统实施例与对CQI反馈进行分析的方法实施例原理相同,相关内容相互之间互相参考即可,在此不再赘述。 [0037] Incidentally, the CQI feedback analysis system embodiments and method embodiments CQI feedback analysis principle the same embodiment, with reference to the content to each other to each other, are not repeated here.

[0038] 以上对本发明所提供的一种对CQI反馈进行分析的方法及系统进行详细介绍,本文中应用了具体实施例对本发明的原理及实施方式进行了阐述,以上实施例的说明只是用于帮助理解本发明的方法及其核心思想;同时,对于本领域的一般技术人员,依据本发明的思想,在具体实施方式及应用范围上均会有改变之处。 [0038] The method and system above to one of the present invention provides a CQI feedback analysis is described in detail herein apply specific embodiments of the principle and embodiments of the present invention have been set forth in the above description of the embodiment is for the purpose help understand the method and core ideas of the present invention; the same time, for those of ordinary skill in the art, according to the idea of ​​the present invention, in the specific embodiments and application scope of the change. 综上所述,本说明书内容不应理解为对本发明的限制。 Therefore, the specification shall not be construed as limiting the present invention.

6 6

Claims (4)

  1. 一种对CQI反馈进行分析的方法,其特征在于,包括如下步骤:CQI一致时间确定步骤,确定LTE系统的CQI一致时间,所述CQI一致时间用于表征CQI时间变化的尺度;分析步骤,依据所述CQI一致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况;判断步骤,对所述CQI反馈的有效性和合理性进行判断。 A method for CQI feedback analysis, characterized by comprising the steps of: CQI same time determining step of determining a CQI same time the LTE system, the CQI is CQI for characterizing time consistent time scale; analysis step, according to the CQI same time, the LTE system, the CQI feedback is analyzed to determine the CQI feedback and processing delays, and when the CQI of the CQI feedback period interval becomes different circumstances; determination step, the active CQI feedback judgment and rationality.
  2. 2.根据权利要求1所述的对CQI反馈进行分析的方法,其特征在于,所述CQI —致时间确定步骤中,所述CQI —致时间Tkjict为满足在时段t内,CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值: Tcqict = max (t =P {CQI对应效率变化< M11时间内}彡R), 其中,M、R根据具体的工程实际和需求来确定。 2. The method of analyzing the CQI feedback according to claim 1, wherein the CQI - actuation time determining step, the CQI - Tkjict actuation time T is satisfied within the time period, the CQI index change probability corresponding change efficiency caused less than a threshold M is not less than R, the maximum value of t: Tcqict = max (t = P {CQI corresponding to the efficiency change <the M11 time} San R), wherein, M, R depending on the particular engineering practice and demand is determined.
  3. 3. —种对CQI反馈进行分析的系统,其特征在于,包括:CQI 一致时间确定模块,用于确定LTE系统的CQI —致时间,所述CQI —致时间用于表征CQI时间变化的尺度;分析模块,用于依据所述CQI —致时间,对所述LTE系统的CQI反馈进行分析,确定所述CQI反馈与处理时延、CQI反馈间隔以及不同时段内CQI的时变情况; 判断模块,用于对所述CQI反馈的有效性和合理性进行判断。 3. - kind of CQI feedback analysis system, characterized by comprising: CQI same time determining module for determining the LTE system CQI - induced time, the CQI - used to characterize the time-varying actuator CQI time scale; an analysis module configured according to the CQI - actuation time, the LTE CQI feedback system is analyzed, and feedback the CQI determination processing delay, and the CQI when the CQI feedback period of the interval becomes different circumstances; determining module, for determining the CQI feedback is effective and reasonable.
  4. 4.根据权利要求3所述的对CQI反馈进行分析的系统,其特征在于,所述CQI —致时间确定模块中,所述CQI —致时间Tkjict为满足在时段t内,CQI索引发生变化所引起的相应效率的变化小于门限M的概率大于等于R的最大t值: Tcqict = max(t :P{CQI对应效率变化< M|t时间内}彡R) 其中,M、R根据具体的工程实际和需求来确定。 Tkjict actuation time T is satisfied within the time period, the CQI index changes - according to claim CQI feedback analysis system of claim 3, wherein the CQI - actuation time determining module, the CQI probability corresponding change efficiency caused less than a threshold M is not less than R, the maximum value of t: Tcqict = max (t: P {CQI corresponding to the efficiency change <M | within the time t} San R) wherein, M, R depending upon the particular project and to determine the actual demand.
CN 201010532093 2010-10-29 2010-10-29 Method and system for analyzing CQI (Channel Quality Indicator) feedback CN101964702B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201010532093 CN101964702B (en) 2010-10-29 2010-10-29 Method and system for analyzing CQI (Channel Quality Indicator) feedback

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201010532093 CN101964702B (en) 2010-10-29 2010-10-29 Method and system for analyzing CQI (Channel Quality Indicator) feedback

Publications (2)

Publication Number Publication Date
CN101964702A true CN101964702A (en) 2011-02-02
CN101964702B CN101964702B (en) 2013-03-06

Family

ID=43517454

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201010532093 CN101964702B (en) 2010-10-29 2010-10-29 Method and system for analyzing CQI (Channel Quality Indicator) feedback

Country Status (1)

Country Link
CN (1) CN101964702B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105743609A (en) * 2014-12-12 2016-07-06 中兴通讯股份有限公司 Method and device for determining channel quality indication CQI efficiency

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080165875A1 (en) * 2007-01-05 2008-07-10 Mundarath Jayakrishnan C Multi-user MIMO-SDMA for finite rate feedback systems
CN101615984A (en) * 2009-08-07 2009-12-30 中兴通讯股份有限公司 Method and device of periodic CQI feedback under carrier polymerization
CN101741508A (en) * 2008-11-11 2010-06-16 中兴通讯股份有限公司 Method for obtaining and using CQI in LTE transmission mode 7

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080165875A1 (en) * 2007-01-05 2008-07-10 Mundarath Jayakrishnan C Multi-user MIMO-SDMA for finite rate feedback systems
CN101741508A (en) * 2008-11-11 2010-06-16 中兴通讯股份有限公司 Method for obtaining and using CQI in LTE transmission mode 7
CN101615984A (en) * 2009-08-07 2009-12-30 中兴通讯股份有限公司 Method and device of periodic CQI feedback under carrier polymerization

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105743609A (en) * 2014-12-12 2016-07-06 中兴通讯股份有限公司 Method and device for determining channel quality indication CQI efficiency

Also Published As

Publication number Publication date
CN101964702B (en) 2013-03-06

Similar Documents

Publication Publication Date Title
KR101422978B1 (en) System and method for implementing power distribution
US8417252B2 (en) Method and apparatus for interference reporting in a N-MIMO communication system
EP2701423B1 (en) Method and device for measuring interference in coordinated multipoint transmission
US8588801B2 (en) Multi-point equalization framework for coordinated multi-point transmission
CN101827437B (en) Mobile communication system, base station device and communication method thereof
JP5224485B2 (en) The method for the detection of failure and recovery in a radio link
CN102804895B (en) A terminal apparatus transmission method and a terminal device
US9894672B2 (en) Method and access network device for interference coordination
EP1898540B1 (en) Mobile station device
JP5037893B2 (en) Cqi notification method and the user terminal
CA2764229C (en) Network-centric link adaptation for coordinated multipoint downlink transmission
US8437788B2 (en) Method and apparatus for allocating radio resources in wireless communication system
JP4899637B2 (en) Wireless communication system and wireless communication method
CN102036393B (en) Method and equipment for determining multi-cell channel information
Aziz et al. Improvement of LTE handover performance through interference coordination
US20080240030A1 (en) Transmission adaptation in a wireless network
Cili et al. Cell switch off technique combined with coordinated multi-point (CoMP) transmission for energy efficiency in beyond-LTE cellular networks
EP1969791B1 (en) A method and apparatus for measurement report for the decision of transmission mode transition
JP2015046915A (en) Method and apparatus for mitigating pilot pollution in wireless network
CN102177670A (en) Method and apparatus for channel feedback in a wireless communication system
JP5719906B2 (en) Link quality evaluation method and apparatus in a communication system
WO2011160581A1 (en) Channel state information processing method and user equipment thereof
CN101427489A (en) Method and apparatus for radio connection setup in a mobile communication system
RU2014141638A (en) Systems and methods for reference signals and feedback csi
JP5247034B2 (en) The base station apparatus used in a mobile communication system, a user device and a transmission power determination method

Legal Events

Date Code Title Description
C06 Publication
C10 Entry into substantive examination
C14 Grant of patent or utility model
EXPY Termination of patent right or utility model