CN103391608A - Method for power control with energy efficiency prioritized in femto-base station network - Google Patents

Method for power control with energy efficiency prioritized in femto-base station network Download PDF

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CN103391608A
CN103391608A CN 201310262938 CN201310262938A CN103391608A CN 103391608 A CN103391608 A CN 103391608A CN 201310262938 CN201310262938 CN 201310262938 CN 201310262938 A CN201310262938 A CN 201310262938A CN 103391608 A CN103391608 A CN 103391608A
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base station
power
energy efficiency
th
femto
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CN 201310262938
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Chinese (zh)
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毛亭力
冯钢
梁靓
秦爽
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电子科技大学
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Abstract

The invention discloses a method for power control with energy efficiency prioritized in a femto-base station network. The method comprises that S1: system total energy efficiency is split into distributed regulation utility corresponding to each base station; S2: the macro base station and each femto access point (FAP) calculate gradient information respectively; S3: each sending base station sends and receives the gradient information and total power information of other base stations periodically and adjusts the required gradient information of the system total energy efficiency to the power as per the power obtained through integration; S4: each base station calculates the minimum power demand under the minimum speed limit in advance; S5: following contents are already known and enabled. According to the method, as per specific characteristics of the femto-base station network, the distributed interactive specific implementing method for power control with the energy efficiency prioritized is provided, on the basis of distributed gradient value interaction, change situations of the system energy efficiency with changes of power values can be traced effectively, the interactive information amount is a little, the system energy efficiency is effectively improved, and the defects of studies on power control with the energy efficiency prioritized are overcome.

Description

一种在毫微微基站网络中实现能效优先的功率控制方法 A femto base station network in a power control method to achieve energy efficiency priority

技术领域 FIELD

[0001] 本发明涉及一种在毫微微基站网络中实现能效优先的功率控制方法。 [0001] The present invention relates to a power control method implemented in the femto base station network priority energy efficiency.

背景技术 Background technique

[0002] 为了解决面临的资源和能耗的双重问题,蜂窝网络基础设施的部署正在从单一的宏蜂窝模式走向多层次的异构网络模式。 [0002] In order to solve the twin problems faced by resource and energy consumption, the deployment of the cellular network infrastructure is moving towards multi-level model of heterogeneous networks from a single macrocell mode. 在这样的异构网络中,整个宏小区网络中分布着各种低功耗的基站,包括微微基站,毫微微基站,中继和分布式天线系统。 In such a heterogeneous network, the macrocell network distributed throughout the various low-power base station, including a pico base station, femto base stations, relays and distributed antenna systems. 在异构网络的部署下,宏基站为整个宏小区提供了一个广泛的区域覆盖伞,而各种低功耗基站则更有针对性地减轻覆盖盲区,更重要的是,满足话务热点区域的通信需求。 In the deployment of heterogeneous networks, the macro base station provides a wide area covering the whole umbrella macrocell, and various low-power base stations are more targeted to alleviate coverage gaps, more importantly, to meet the traffic hot spot area communication needs. 毫微微基站,又被称作为毫微微接入点(FAP),作为一种由用户部署的低功耗小型基站是一种非常有前景的低功耗基站设备。 Femto base stations, also referred to as a femto access point (the FAP), a small low-power base station for deployment by the user is a very promising low-power base station equipment. 由于用户的大多数通信都是发生在室内环境中,FAP可以以较低的功率更好的覆盖能力为室内用户提供更好的通信服务。 Since most users are communication occurs in an indoor environment, FAP can lower power and better coverage to provide better communication services for indoor users. FAP有两种接入模式:封闭接入模式和开放接入模式。 FAP has two access modes: closed access mode and open access mode. 在封闭接入模式中,只有FAP签约用户才能接入到FAP ;然而,在开放模式中,任何用户都可以接入到FAP。 In the closed access mode, only the subscriber can access the FAP FAP; however, in the open mode, any user can access to the FAP. 从用户的个人信息安全角度考虑,封闭接入模式的FAP更受青睐,所以本发明研究的对象是封闭模式下的FAP。 From the security perspective of the user's personal information, a closed access mode FAP favored, so the object of the present invention was studied in a closed mode FAP.

[0003] 虽然FAP作为一种低功耗基站,已经能有效地降低基站的能源消耗,但是随着FAP规模的增大以及用户的自组织性,封闭接入模式的FAP存在的跨层干扰问题十分突出,并且制约着宏基站与FAP共存异构网中频谱效率和能效的提高。 [0003] While FAP as a low power base station has been able to effectively reduce the energy consumption of the base station, but with the increase of the size of FAP and self-organization of the user, a closed access mode FAP cross-layer interference occurring very prominent, and restricts the macro base station FAP coexisting heterogeneous network spectral efficiency and increase the energy efficiency. 当宏基站用户处于FAP覆盖范围内时,由于宏基站用户无法接入FAP,如果没有恰当的功率控制或频率复用机制,FAP会对宏基站与宏基站用户的通信造成严重的干扰,造成频谱效率的降低,同时为了保证相应受干扰宏基站用户的通信质量,宏基站会分配非常大的功率,却获得微小的速率增益,不利于能量效率的提高。 When the user is within the macro base station coverage area of ​​FAP, because the user can not access to the macro base station FAP, without proper power control mechanism or frequency reuse, macro base station FAP will cause serious interference to the macro base station to communicate with the user, resulting in the spectrum reduce efficiency, and in order to ensure appropriate communication quality by interference macro base station users, macro base station allocates a very large power, has gained a slight gain rate is not conducive to improving energy efficiency. 因此,找到一种减少干扰并提高能量效率的功率分配和频率复用方案显得尤为重要。 Therefore, to find a reduce interference and improve the energy efficiency of power distribution and frequency reuse scheme is particularly important. 大多数之前的研究都把重心放在干扰减轻和容量最大化上,而不是关注整个系统的能量效率最大化。 Most previous studies regard the focus on mitigating interference and maximize capacity, rather than on the entire system to maximize energy efficiency. 随着全球绿色通信的兴起,研究一种高能效的同时适当兼顾频谱效率的功率分配和控制方法·显得更为重要。 With the rise of global green communication, research an energy-efficient, while an appropriate balance between spectral efficiency of power distribution and control Methods and more important.

发明内容 SUMMARY

[0004] 本发明的目的在于克服现有技术的不足,提供一种以提高整个网络的能量效率并保证合适的频谱效率,从而提高系统的整体性能的在毫微微基站网络中实现能效优先的功率控制方法。 [0004] The object of the present invention is to overcome the disadvantages of the prior art, there is provided a network in order to improve the energy efficiency of the whole and to ensure proper spectral efficiency, thereby improving the energy efficiency of the power to achieve the preferred femto base station network in the overall performance of the system Control Method.

[0005] 本发明的目的是通过以下技术方案来实现的:一种在毫微微基站网络中实现能效优先的功率控制方法,它包括以下步骤: [0005] The object of the present invention is achieved by the following technical solutions: A femto base station network in a power control method to achieve energy efficiency priority, comprising the steps of:

[0006] S1:将系统总能效拆分成各基站对应的分布式调控效用:Uk=變~ PeJ), [0006] S1: The overall system efficiency corresponding to each base station is split into a distributed-control effectiveness: Uk = variable ~ PeJ),

JO JO

'^=^1,2/",4,#,0,?。1;分别是第1^个发送基站的总速率,总发送功率,固定电路功率消耗,它包括以下步骤: '^ 2 = ^ / "4, #, 0, 1, respectively; ^ is the total rate of the first transmitting station, the total transmit power, the power consumption of the circuit is fixed, comprising the steps?.:

[0007] S2:宏基站和每个毫微微接入点FAP分别计算各自分布式调控效用对每个发送基站功率的梯度信息/尤,I>„:M = /¾:反映出第j个发送基站在第m个资源块RB上分 [0007] S2: macro base station and each of the femto access point FAP were calculated for each of the distributed-control utility power gradient information of each base station transmission / particular, I> ": M = / ¾: reflect the j-th transmission base points on the m-th resource block RB

配的功率对第k个发送基站的效用函数造成的影响,其中^是第m个RB上的发送功率; Effect of power utility function with the k-th base stations caused by transmitting, wherein ^ is the transmit power of the RB in the m-th;

[0008] S3:各个发送基站周期性地发送和接收周围相邻基站分布式调控效用对功率的梯度信息和其他基站的总功率信息,并整合信息得到功率调整所需要的系统总能效对功率的 [0008] S3: each base station periodically transmits the received neighboring base station transmits and distributed around the total power regulation of the utility power information and gradient information of the other base stations, and integration of information systems to give the required power adjustment of the overall energy efficiency of the power

梯度信息,整合方式为'周期在实际系统中根据梯度信息的接收情 Gradient information, integrated way 'period in a practical system according to the received information of emotion gradient

k k

况和基站处理速度进行合理的调整,可以为多个传输时间间隔TTI ; The base station processing conditions and reasonable speed adjustment, may be a plurality of transmission time interval TTI;

[0009] S4:每个基站预先计算出最低速率限制下的最低功率需求:d [0009] S4: calculated in advance for each base station at the minimum power demand lowest rate limits: d

V1-G {0,1,2,-,if},以满足每个分配的资源块上的速率满足最低速率要求; V1-G {0,1,2, -, if}, to satisfy the rate on each resource block allocated to meet the minimum rate requirement;

[0010] S5:已知 [0010] S5: Known

令i = {衲/>„ > 0} , 4 = {則/¾ < 0},第k个发送基站进行功率分配包括以下子步骤: So that I = {cassock /> "> 0}, then {4 = / ¾ <0}, k th base station transmission power allocation includes the substeps of:

[0011] S501:当A* # O 时,对每一个m ^ [0011] S501: When the time A * # O, each m ^

Figure CN103391608AD00051

[0024] A/j=/f„-,初始功率分配是平均功率分配,功率调整步长A不是固定值, [0024] A / j = / f "-, the initial power allocation is the average power distribution, the power adjusting step A is not a fixed value,

而是随着功率调整的值变化;如果相同RB上当前时隙的功率值与上上时隙的功率值的差值小于当前A值,则调整A = A/2。 But with the change of the value of the power adjustment; if the current power value of the slot of the same RB and the difference between the power value of the current time slot is less than the A value is adjusted A = A / 2. 所述的分布式调控效用对功率的梯度信息的计算方法为: The distributed method for calculating the regulation of utility power gradient information is:

Figure CN103391608AD00061
Figure CN103391608AD00062

是第k个发送基站在 It is the k th base station transmits

第m个RB上的信干噪比,代表的发送基站j到发送基站k的用户在第m个RB的信道衰落。 SINR on the m-th RB, j representative of the base station transmits to the base station k transmits user channel fading at the m-th RB.

[0029] 本发明的有益效果是: [0029] Advantageous effects of the present invention are:

[0030] 1、根据毫微微基站网络的具体特点,提出了分布式有交互的能效优先的功率控制的具体实现方法,弥补了已有研究中对能效优先的功率控制研究的不足; [0030] 1, the femto base station according to the specific characteristics of the network, the specific implementation proposed power control method for a distributed energy efficiency have interaction priority, existing research study up for the lack of control of the power energy efficiency priority;

[0031] 2.、基于分布式梯度值交互,能有效地追踪系统能效随着功率值改变的变化情况,交互的信息量较少,有效提升了系统能效。 [0031] 2, gradient value based interactive distributed, effective to track changes in the system energy efficiency with the changed power values ​​less interactive information, effectively increasing the system efficiency.

附图说明 BRIEF DESCRIPTION

[0032] 图1为本发明的基本应用场景; [0032] FIG. 1 the basic application scenario of the present invention;

[0033] 图2为本发明的功率控制方案(EEPC)与集中式功率控制方案(CPC)和以普通只注重最低速率要求的功率控制方案(DPC)的能效对比曲线图; [0033] The power control scheme (EEPC) in FIG. 2 of the present invention and the centralized power control scheme (CPC) and to focus only on ordinary graph comparing the energy efficiency of a power control scheme (DPC) of the minimum rate requirements;

[0034] 图3为本发明的本发明功率控制方案(EEPC)与集中式功率控制方案(CPC)和以普通只注重最低速率要求的功率控制方案(DPC)的频谱效率对比曲线图。 [0034] The power control scheme (EEPC) of the present invention, FIG. 3 of the present invention with the centralized power control scheme (CPC) and to focus only on the minimum rate requirement ordinary power control scheme (DPC) is a graph comparing the spectral efficiency.

具体实施方式 detailed description

[0035] 下面结合附图进一步说明本发明的技术方案,但本发明所保护的内容不局限于以下所述。 [0035] The following further illustrate the technical solutions of the present invention in conjunction with the accompanying drawings, but the present invention is protected by the content is not limited to the following.

[0036] 如图1所示,一个宏小区覆盖范围下分布多个采用封闭模式管理的毫微微小区,宏小区用户被称为主用户(PUE),femto小区用户被称为次用户(SUE)。 [0036] As shown in FIG 1 the distribution of the next macro-cell coverage area using a plurality of closed mode management femtocell, macrocell user is referred to as primary user (PUE), femto cell is referred to as the user views the user (the SUE) .

[0037] —种在毫微微基站网络中实现能效优先的功率控制方法,它包括以下步骤: [0037] - the energy efficiency of the power control method species preferentially implemented in the femto base station network, comprising the steps of:

[0038] S1:将系统总能效拆分成各基站对应的分布式调控效用: [0038] S1: The overall system efficiency is split into a distributed-control effectiveness of each base station corresponding to:

Figure CN103391608AD00063
Figure CN103391608AD00064

分别是第1^个发送基站的总速率,总发送功率,固定电路功率消耗,它包括以下步骤: Are the total rate of the first base station transmitting ^ 1, total transmission power, the power consumption of the circuit is fixed, comprising the steps of:

[0039] S2:宏基站和每个毫微微接入点FAP分别计算各自分布式调控效用对每个发送基 [0039] S2: macro base station and each of the femto access point FAP were calculated for each utility to each distributed-control group transmitted

站功率的梯度信息/尤^,/f I =3/.4./d/1:反映出第j个发送基站在第m个资源块RB上分 Gradient kiosk power / esp ^, / f I = 3 / .4 / d / 1:. Reflects the j-th points on the base station transmits the m-th resource block RB

配的功率对第k个发送基站的效用函数造成的影响,其中是第m个RB上的发送功率; Effect of power utility function with the k-th transmission of the base station caused by, where is the m-th transmission power on the RB;

[0040] S3:各个发送基站周期性地发送和接收周围相邻基站分布式调控效用对功率的梯度信息和其他基站的总功率信息,并整合信息得到功率调整所需要的系统总能效对功率的 [0040] S3: each base station periodically transmits the received neighboring base station transmits and distributed around the total power regulation of the utility power information and gradient information of the other base stations, and integration of information systems to give the required power adjustment of the overall energy efficiency of the power

梯度信息,整合方式为周期在实际系统中棚梯度舖的接收情 Gradient information, cycle shop integrated way in the shed system receives the actual situation gradient

k k

况和基站处理速度进行合理的调整,可以为多个传输时间间隔TTI ; The base station processing conditions and reasonable speed adjustment, may be a plurality of transmission time interval TTI;

[0041] S4:每个基站预先计算出最低速率限制下的最低功率需求:dV1-G {0,1,2,-.,Al.以满足每个分配的资源块上的速率满足最低速率要求; [0041] S4: calculated in advance for each base station at the minimum power demand minimum rate limiting:.. DV1-G {0,1,2, - the rate, Al to satisfy every allocated resource blocks meet the minimum rate requirements ;

[0042] S5:已知< ' __卞-,W + ,令卞政_ , [0042] S5: Known < '__ Bian -, W +, _ so Bian Zheng,

4 = <0},第k个发送基站进行功率分配包括以下子步骤: = 4 <0}, k th base station transmission power allocation includes the substeps of:

[0043] S501:当A*# O 时,对每一个m ^ A* [0043] S501: When the time A * # O, each m ^ A *

[0044] if <> Z fjnm, [0044] if <> Z fjnm,

[0045] min(A, - Zfjnill) [0045] min (A, - Zfjnill)

[0046] AF= A/*+ min(A, — /^tnm) [0046] AF = A / * + min (A, - / ^ tnm)

[0047] else if A P>0 且/= < /f.mm , [0047] else if A P> 0 and / = </f.mm,

[0048] /f = Ifil + mill {A, A/}, [0048] / f = Ifil + mill {A, A /},

[0049] AP= A P-min { A,AP} [0049] AP = A P-min {A, AP}

[0050] end [0050] end

[0051] S502:当A* # O 时,对每一个m ^ A* [0051] S502: When the time A * # O, each m ^ A *

[0052] if AP>0, [0052] if AP> 0,

[0053] + [0053] +

[0054] AP= A P-min { A,AP} [0054] AP = A P-min {A, AP}

[0055] End [0055] End

[0056] ;f/f,初始功率分配是平均功率分配,功率调整步长A不是固定值, [0056]; f / f, the initial power allocation is the average power distribution, the power adjusting step A is not a fixed value,

々I 々I

而是随着功率调整的值变化;如果相同RB上当前时隙的功率值与上上时隙的功率值的差值小于当前A值,则调整A = A/2。 But with the change of the value of the power adjustment; if the current power value of the slot of the same RB and the difference between the power value of the current time slot is less than the A value is adjusted A = A / 2.

[0057] 所述的分布式调控效用对功率的梯度信息的计算方法为: [0057] The distributed method for calculating the regulation of the utility power gradient information is:

[0058] =CiflIdJ^ [0058] = CiflIdJ ^

Figure CN103391608AD00081
Figure CN103391608AD00082

送基站在第m个RB上的信干噪比,#;-代表的发送基站j到发送基站k的用户在第m个RB的信道衰落。 The base station transmitting on the m-th SINR RB, #; - transmitted to the base station representative of the user sends the base station j k fading in the channel of the m-th RB.

Figure CN103391608AD00083
Figure CN103391608AD00084

.[0064] 从推导中我们可以看到,只需获得信干噪比Fk(P)、^和其他基站总发送功率的信息,发送基站k就可以分布式地获得自身分布式调控效用对所使用的第m个RB上功率的梯度。 . [0064] We can see from the derivation, obtained simply SINR Fk (P), ^ and the total transmission power information of the other base stations, the base station transmits k obtained can be distributed utility of their own regulatory distributed use of the m-th power gradient RB. Fk⑵和f;/<都是发送基站k可以直接知道的,可以通过用户测量并反馈, Fk⑵ and f; / <k base station are transmitted directly known, and can be measured by the user feedback,

Figure CN103391608AD00085

这个包括了其它基站的功耗信息,可以通过IP网络进行交互也可以通过 This power consumption information includes other base stations, may interact via an IP network can also

特别的无线接口进行交互。 Special wireless interface to interact. 所以每个发送基站都可以获得自身分布式调控效用对所使用的RB上功率的梯度。 Therefore, each base station can receive its own transmitted distributed on the regulation of the utility power used RB gradient.

[0065] 功率控制的目标是提高整个网络的系统总能效 [0065] The objective of power control is to improve the overall system energy efficiency of the entire network

Figure CN103391608AD00086

其中 among them

Rk,Pk, Pc,k分别是第k个发送基站的总速率,总发送功率,固定电路功率消耗,当k=0时,表示的是宏基站,即包括宏基站和所有FAP在内的发送基站的总能效最优,同时满足每个分配的资源块上的速率满足最低速率要求,每个发送基站的总发送功率不大于总功率限制的条件。 Rk, Pk, Pc, k are the k-th base station total transmission rate, the total transmit power, the power consumption of the circuit is fixed, when k = 0, represented by a macro base station, i.e., all the FAP comprises a macro base station and a transmission including optimal overall energy efficiency of the base station while meeting the rate of resource blocks allocated to each meet the minimum rate requirement, the total transmission power of each base station is transmitted is not greater than the total power constraint conditions.

[0066] 如图2和图3所示,本发明的功率控制方案(EEPC)的能效和频谱效率均高于集中式功率控制方案(CPC)和以普通只注重最低速率要求的功率控制方案(DPC)。 [0066] As shown in FIG. 2 and FIG. 3, a power control scheme (EEPC) of the present invention, spectrum efficiency and energy efficiency are higher than the centralized power control scheme (CPC) and to focus only on the ordinary power control scheme minimum rate requirements ( DPC).

Claims (2)

  1. 1.一种在毫微微基站网络中实现能效优先的功率控制方法,其特征在于:它包括以下步骤: s1:将系统总能效拆分成各基站对应的分布式调控效用 A femto base station network energy efficiency priority power control method implemented, characterized in that: it comprises the steps of: S1: split the overall system efficiency as a distributed-control base station corresponding to each utility
    Figure CN103391608AC00021
    Vl= {0,1,2,-,4 ^ Rk,Pk,Pca分别是第k个发送基站的总速率,总发送功率,固定电路功率消耗,它包括以下步骤:52:宏基站和每个毫微微接入点FAP分别计算各自分布式调控效用对每个发送基站功率的梯度信息= WZf /5/;^反映出第j个发送基站在第m个资源块RB上分配的功率对第k个发送基站的效用函数造成的影响,其中^是第m个RB上的发送功率; 53:各个发送基站周期性地发送和接收周围相邻基站分布式调控效用对功率的梯度信息和其他基站的总功率信息,并整合信息得到功率调整所需要的系统总能效对功率的梯度信息,整合方式为 Vl = {0,1,2, -, 4 ^ Rk, Pk, Pca are the total rate of the k-th transmission of the base station, total transmission power, the power consumption of the circuit is fixed, comprising the steps of: 52: macro base station and each femto access point FAP were calculated for each utility to each distributed-control base station transmission power gradient information = WZf / 5 /; ^ reflect the j-th base station transmission on the assigned resource block RB m-th power of the k Effect utility function caused by transmitting base station, wherein ^ is the m-th transmission power of the RB; 53: each base station periodically transmits transmitting and receiving neighbor base stations distributed around the regulation of the utility power gradient information and the other base stations total power information, information and integrate power adjustment to give the required overall system efficiency of the power gradient information, integrated way
    Figure CN103391608AC00022
    力'周期在实际系统中根据梯度信息的接收情况和基站处理速度进行合理的调整,可以为多个传输时间间隔TTI ; 54:每个基站预先计算出最低速率限制下的最低功率需求:汽'wG m2,"•爲以满足每个分配的资源块上的速率满足最低速率要求;S5:已知Ifm , Force 'cycle in a practical system and a base station according to the receiving condition information processing speed gradient reasonable adjustments, may be a plurality of transmission time interval TTI; 54: calculated in advance for each base station at the minimum power demand lowest rate limits: Vapor' wG m2, "• as to meet the rate on each resource block allocated to meet the minimum rate requirement; S5: known Ifm,
    Figure CN103391608AC00023
    Figure CN103391608AC00024
    第k个发送基站进行功率分配包括以下子步骤: 5501:当A*关O时,对每一个m GA* K-th base station transmission power allocation includes the substeps of: 5501: When A * Off O when each m GA *
    Figure CN103391608AC00025
    else if A P>0 且^ , AP= A P-min { A,AP} end 5502:当A*关O时,对每一个m GA* if A P>0, else if A P> 0 and ^, AP = A P-min {A, AP} end 5502: When A * Off O when each m GA * if A P> 0,
    Figure CN103391608AC00026
    Figure CN103391608AC00031
    初始功率分配是平均功率分配,功率调整步长a不是固定值,而是随着功率调整的值变化;如果相同RB上当前时隙的功率值与上上时隙的功率值的差值小于当前A值,则调整A = A/2。 The initial power distribution is the average power distribution, a power adjustment step size is not a fixed value but as a change in value of the power adjustment; if the current power value of the slot of the same RB and the upper slot power value is smaller than the current difference A value, the adjustment A = A / 2.
  2. 2.根据权利要求1所述的一种在毫微微基站网络中实现能效优先的功率控制方法,其特征在于:所述的分布式调控效用对功率的梯度信息/七“的计算方法为: 2. The power control method according to a preferred realization of energy efficiency in the femto base station network claims, wherein: said distributed regulation of utility power gradient information calculating method / seven "is:
    Figure CN103391608AC00032
    其中,V/={0,l52,--5iT}, k = {0,1,2,...,K},H(Fk(P))=Blog2(l+Fk(P)), 获“ Wherein, V / = {0, l52, - 5iT}, k = {0,1,2, ..., K}, H (Fk (P)) = Blog2 (l + Fk (P)), is eligible "
    Figure CN103391608AC00033
    是第k 个发送基站在第m个RB上的信干噪比,代表的发送基站j到发送基站k的用户在第m个RB的信道衰落。 Is the k th base station transmits on the m-th SINR RB, the base station transmits the representative base station j to user k transmitted in a fading channel of the m-th RB.
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