WO2020248574A1 - 无线接入频谱灵活光网络的能耗优化方法、系统 - Google Patents
无线接入频谱灵活光网络的能耗优化方法、系统 Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/02—Arrangements for optimising operational condition
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
- H04W16/18—Network planning tools
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/08—Access point devices
- H04W88/085—Access point devices with remote components
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Definitions
- the present invention relates to the technical field of signal processing, in particular to a method and system for optimizing energy consumption of a wireless access spectrum flexible optical network.
- the fifth-generation (5G) mobile network came into being.
- the fifth-generation (5G) mobile network will not only provide different network services, such as enhanced mobile broadband, media transmission, industrial applications, and autonomous driving, but also meet large bandwidth requirements. And low-latency application service requirements.
- the optical communication network plays an important role in the mobile fronthaul and backhaul network.
- the present invention at least partially solves the problem of energy consumption efficiency of the 5G optical access mobile network with large bandwidth, low delay and high efficiency.
- the service flow grooming method By adopting the service flow grooming method, the integer linear programming model for the smallest power consumption is proposed, and the wireless access is realized.
- the technical solution adopted to solve the technical problem of the present invention is a method for optimizing energy consumption of a wireless access spectrum flexible optical network, including:
- PRRH the unit power consumption of the remote radio head
- X i,j binary variable, if the j-th RRH in the i-th base station is occupied, X i,j is 1, otherwise it is 0
- T represents the unit time
- P BBU the unit power consumption of the baseband unit port
- Y i,k binary variable, if the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise Is 0
- A a group of base station area sets; i: the index number of the i-th area in the base station; j: the index number of the j-th RRH; k: the k-th BBU port index number;
- the obtaining the minimum number of remote radio heads occupied by the service request and the minimum occupied baseband unit port based on the service flow grooming algorithm includes:
- the aggregated traffic information is divided into different data rates, and the data rate is the same one-to-one correspondence with the rate carried by the remote radio head of each front-end function.
- the solution to the objective function based on the constraint condition of the objective function of the flow grooming energy consumption optimization includes:
- the input constant includes:
- PRRH the unit power consumption of the remote radio head
- PBBU The unit power consumption of the baseband unit port
- RRHC i,j the capacity of the j-th RRH in the i-th area
- BBUC i,k the capacity of the k-th BBU port in the i-th area
- ⁇ s, d the size of business traffic from source node s to destination node d;
- CR A set of known service requests
- AR a set of RRHs in a base station
- T means unit time.
- variable index includes:
- s and d the index number of the service request from the source node s to the destination node d.
- variable parameters include:
- Xi ,j Binary variables, if the jth RRH in the ith base station is occupied, then Xi ,j is 1, otherwise it is 0;
- Y i,k Binary variable. If the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise it is 0;
- the technical solution adopted to solve the technical problem of the present invention is an energy consumption optimization system for wireless access to a spectrum-flexible optical network, including:
- the business request acquisition module is used to acquire a set of business requests
- An arithmetic module which is used to solve the objective function based on the constraint conditions of the objective function of the optimization of energy consumption for traffic grooming to obtain the minimum number of remote radio heads occupied by the service request and the minimum occupied baseband unit port;
- a transmission module which uses the number of remote radio heads and the baseband unit port to carry the traffic demand of the service request;
- PRRH the unit power consumption of the remote radio head
- X i,j binary variable, if the j-th RRH in the i-th base station is occupied, X i,j is 1, otherwise it is 0
- T represents the unit time
- P BBU the unit power consumption of the baseband unit port
- Y i,k binary variable, if the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise Is 0
- A a group of base station area sets; i: the index number of the i-th area in the base station; j: the index number of the j-th RRH; k: the k-th BBU port index number;
- the calculation module includes:
- a data input unit for obtaining input constants, variable indexes, and variable parameters of the objective function
- the wireless network traffic enters the baseband unit (BBU) pool from the remote radio head through the convergence method.
- BBU baseband unit
- the traffic grooming method the business traffic is connected to the spectrum flexible optical network, so that the wireless access spectrum flexible optical network provides services.
- the flow grooming method the number of remote radio heads and baseband unit ports for wireless access to the spectrum-flexible optical network is reduced, and the energy consumption of the network is reduced.
- FIG. 1 is a flowchart of a method for optimizing energy consumption of a wireless access spectrum flexible optical network according to Embodiment 1 of the present invention
- Figure 2 is a block diagram of a system for optimizing energy consumption of a wireless access spectrum flexible optical network according to Embodiment 1 of the present invention.
- the wireless access spectrum flexible optical network consists of a remote radio head (RRH) with front-end functions, an optical wireless fronthaul/backhaul network, a baseband unit (BBU) pool, and a spectrum flexible optical network.
- the remote radio head antenna is installed at the base station end of the local cell and is connected to different mobile devices through a wireless network.
- the baseband unit pool centrally manages each baseband unit. These baseband units are mainly connected to the remote radio head through the fronthaul/backhaul optical wireless network, and the intermediate links need to be converted through photoelectric and electro-optical (O-E-O).
- a baseband unit port is connected with a remote radio head, so that each pair of baseband unit ports and a remote radio head exchange wireless data and optical data through the Common Public Radio Interface (CPRI).
- CPRI Common Public Radio Interface
- the energy consumption component of a flexible wireless access spectrum optical network mainly includes: remote radio heads, baseband units, O-E-O converters, and fixed equipment.
- OEO converters and fixed equipment are not considered here, because there are many ways to reduce the energy consumption of OEO converters, and the energy consumption of fixed equipment has nothing to do with the transfer of data traffic, but the remote radio head needs to be guaranteed in the network. Work with equipment such as baseband unit, especially the cooling of equipment. Therefore, in the wireless access spectrum flexible optical network, only the energy consumption of the remote radio head and the baseband unit is considered, where the energy consumption is the power consumption per unit time (for example, second).
- N RRH , P RRH , N BBU and P BBU respectively represent the number of remote radio heads, the unit power consumption of the remote radio heads, the number of baseband unit ports, and the unit power consumption of baseband unit ports. If the unit time is considered, for example, the unit time is second, the energy consumption value of the wireless access spectrum flexible optical network is the same as the power consumption value.
- This embodiment provides a method for optimizing energy consumption of a wireless access spectrum flexible optical network, including:
- Step 11 Obtain a set of business requests
- Step 12 Based on the service flow grooming algorithm, obtain the minimum number of remote radio heads occupied by the service request and the minimum occupied baseband unit port;
- Step 13 Solve the objective function based on the constraint condition of the objective function of the energy consumption optimization of traffic grooming, so as to realize the transmission of the service request;
- PRRH the unit power consumption of the remote radio head
- X i,j binary variable, if the j-th RRH in the i-th base station is occupied, X i,j is 1, otherwise it is 0
- T represents the unit time
- P BBU the unit power consumption of the baseband unit port
- Y i,k binary variable, if the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise Is 0
- A a group of base station area sets; i: the index number of the i-th area in the base station; j: the index number of the j-th RRH; k: the k-th BBU port index number;
- the constraint conditions of the objective function include:
- the obtaining the minimum number of remote radio heads occupied by the service request and the minimum occupied baseband unit port based on the service flow grooming algorithm includes:
- the aggregated traffic information is divided into different data rates, and the data rate is the same one-to-one correspondence with the rate carried by the remote radio head of each front-end function.
- the remote radio head of each front-end function can be exactly matched, which is beneficial to reduce the number of remote radio heads of the front-end function in the local cell base station.
- the N ⁇ M optical switch of the optical line terminal is used to convert the service traffic from the optical signal to an electrical signal, that is, OE conversion, and then The service flow is smoothed through the electric switch, and the electric signal is converted into an optical signal.
- the service flow from the base station of the local cell passes through the optical line terminal through the optical line terminal (OEO), the service flow is connected to the BBU port, and finally flows to Flexible spectrum optical network.
- a baseband unit port is connected to a remote radio head, so that each pair of baseband unit ports and a remote radio head exchange wireless data and optical data through the Common Public Radio Interface (CPRI).
- CPRI Common Public Radio Interface
- the step 13 includes:
- the input constant includes:
- PRRH the unit power consumption of the remote radio head
- PBBU The unit power consumption of the baseband unit port
- RRHC i,j the capacity of the j-th RRH in the i-th area
- BBUC i,k the capacity of the k-th BBU port in the i-th area
- ⁇ s, d the size of business traffic from source node s to destination node d;
- CR A set of known service requests
- AR a set of RRHs in a base station
- T means unit time.
- variable index includes:
- s and d the index number of the service request from the source node s to the destination node d.
- variable parameters include:
- Xi ,j Binary variables, if the jth RRH in the ith base station is occupied, then Xi ,j is 1, otherwise it is 0;
- Y i,k Binary variable. If the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise it is 0;
- This embodiment provides an energy consumption optimization system for a wireless access spectrum flexible optical network, including:
- the business request acquisition module is used to acquire a set of business requests
- An arithmetic module which is used to solve the objective function based on the constraint conditions of the objective function of the optimization of energy consumption for traffic grooming to obtain the minimum number of remote radio heads occupied by the service request and the minimum occupied baseband unit port;
- a transmission module which uses the number of remote radio heads and the baseband unit port to carry the traffic demand of the service request;
- PRRH the unit power consumption of the remote radio head
- X i,j binary variable, if the j-th RRH in the i-th base station is occupied, X i,j is 1, otherwise it is 0
- T represents the unit time
- P BBU the unit power consumption of the baseband unit port
- Y i,k binary variable, if the j-th BBU port in the i-th base station is occupied, Y i,k is 1, otherwise Is 0
- A a group of base station area sets; i: the index number of the i-th area in the base station; j: the index number of the j-th RRH; k: the k-th BBU port index number;
- the calculation module includes:
- a data input unit for obtaining input constants, variable indexes, and variable parameters of the objective function
- the system of the above solution can perform the above method, so it can reduce the power consumption of the remote radio head and the port of the baseband unit.
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Abstract
本发明提供一种无线接入频谱灵活光网络的能耗优化方法、系统,所述方法包括:获取一组业务请求;基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,以实现所述业务请求的传输。
Description
本发明涉及信号处理技术领域,具体地,涉及一种无线接入频谱灵活光网络的能耗优化方法、系统。
随着互联网、大数据、数据中心、超高清晰视频、人工智能、虚拟现实、自动驾驶等业务需求的发展,当前移动网络带宽服务和传输速率难以适应业务发展需求,急需从网络带宽、速率、传输时延、效率等方面对移动网络进行升级换代。
第五代(5G)移动网络应运而生,第五代(5G)移动网络将不仅能提供不同的网络服务,如增强的移动宽带、媒体传输、工业应用、自动驾驶,而且还能满足大带宽和低延迟的应用服务需求。为了传输移动网络的数据业务,光通信网络在移动前传和回传网络中扮演着重要角色。
因此,提高5G移动网络的能耗效率,实现无线接入频谱灵活光网络的最优化功耗是一个亟待解决的问题。
发明内容
本发明至少部分解决解决大带宽、低时延、高效率的5G光接入移动网的能耗效率问题,通过采用业务流量疏导方法,提出面向功耗最小的整数线性规划模型,实现了无线接入频谱灵活光网络的最优化功耗。
解决本发明技术问题所采用的技术方案是一种无线接入频谱灵活光网络的能耗优化方法,包括:
获取一组业务请求;
基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;
使用所述远端射频头数目和所述基带单元端口承载所述业务请求的流量需求;
其中,所述目标函数的表达式为:
式中,P
RRH:远端射频头的单位功耗;X
i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;T:表示单位时间;P
BBU:基带单元端口的单位功耗;Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1,否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;
所述目标函数的约束条件包括:(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量;(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量;(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量;(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量;(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量; (6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量。
可选地,所述基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口,包括:
在本地小区基站中,根据每一个业务需求流量需求,进行流量信息收集与汇聚;
将这些汇聚的所述流量信息被切分成不同的数据速率,且所述数据速率和每一个前端功能的远端射频头所承载的速率一一对应相同。
可选地,所述基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,包括:
获取所述目标函数的输入常量、变量索引、变量参数;
基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数;
其中,所述输入常量包括:
1)PRRH:远端射频头的单位功耗;
2)PBBU:基带单元端口的单位功耗;
3)RRHC
i,j:在第i区域里第j个RRH的容量;
4)BBUC
i,k:在第i区域里第k个BBU端口的容量;
5)Λ
s,d:从源节点s到目的节点d的业务流量大小;
6)(s,d):从源节点s到目的节点d的业务请求,其中s≠d;
7)CR:一组已知的业务请求;
8)A:一组基站区域集合;
9)AR:在一个基站中一组RRH集合;
10)B:在一个区域中一组BBU端口集合;
11)T:表示单位时间。
所述变量索引包括:
1)i:在基站中第i区域的索引编号;
2)j:第j个RRH的索引编号;
3)k:第k个BBU端口索引编号;
4)s和d:从源节点s到目的节点d的业务请求的索引编号。
所述变量参数包括:
1)X
i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;
2)Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1,否则为0;
解决本发明技术问题所采用的技术方案是一种无线接入频谱灵活光网络的能耗优化系统,包括:
业务请求获取模块,用于获取一组业务请求;
运算模块,用于基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;
传输模块,使用所述远端射频头数目和所述基带单元端口承载所述业务请求的流量需求;
其中,所述目标函数的表达式为:
式中,P
RRH:远端射频头的单位功耗;X
i,j:二进制变量,如 果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;T:表示单位时间;P
BBU:基带单元端口的单位功耗;Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1,否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;
所述目标函数的约束条件包括:(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量;(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量;(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量;(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量;(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量;(6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量。
可选地,所述运算模块包括:
数据输入单元,用于获取所述目标函数的输入常量、变量索引、变量参数;
基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数
本发明无线接入频谱灵活光网络的能耗优化方法、系统至少有如下有益效果:
无线网络流量由远端射频头通过汇聚的方式进入基带单元(BBU)池,通过采用流量疏导方法,把业务流量接入到频谱灵活光网络,使无线接入频谱灵活光网络提供服务。通过采用流量 疏导方法,减少无线接入频谱灵活光网络的远端射频头和基带单元端口的数目,使网络的能耗降低。
图1为本发明实施例1的无线接入频谱灵活光网络的能耗优化方法的流程图;
图2为本发明实施例1的无线接入频谱灵活光网络的能耗优化系统的框图。
为使本领域的技术人员更好地理解本发明的技术方案,下面结合附图和具体实施方式对本发明作进一步详细描述。
无线(5G C-RAN)接入频谱灵活光网络的架构描述:
无线接入频谱灵活光网络由具备前端功能的远端射频头(RRH)、光无线前传/回传网络、基带单元(BBU)池、频谱灵活光网络所构成。远端射频头天线安装在本地小区基站端,通过无线网络的形式与不同的移动设备接入。基带单元池集中管理每一个基带单元,这些基带单元主要通过前传/回传光无线网络连接到远端射频头,中间环节需要通过光电和电光(O-E-O)转换。此外,一个基带单元端口和一个远端射频头连接,这样每一对基带单元端口和一个远端射频头通过通用公共无线电接口(CPRI)进行无线数据与光的数据交换。由于流量业务在远端射频头和基带单元之间动态变化,需要在远端射频头进行数据汇聚,而在基带单元端口上需要进行业务流量的疏导。数据流量将通过基带单元端口传输到频谱灵活光网络上。
无线接入频谱灵活光网络的能耗构成元件。在无线接入频谱灵活光网络的架构中,网络能耗主要包括:远端射频头、基带单元、O-E-O转换器、固定设备。这里并没有考虑O-E-O转换器和固定设备,因为降低O-E-O转换器的能耗,已有很多方法,而固定设备的能耗开销与数据流量大小的交接无关,但在网络中需要保证远端射频头和基带单元等设备的工作,特别是设备的降温。因此,在无线接入频谱灵活光网络中,只考虑远端射频头和基带单元的能耗,这里的能耗是单位时间(例如秒)内的功耗。用以下式子表示无线接入频谱灵活光网络的功耗:
PC=N
RRH×P
RRH+N
BBU×P
BBU
这里N
RRH、P
RRH、N
BBU、P
BBU分别表示远端射频头的数目、远端射频头的单位功耗、基带单元端口的数目、基带单元端口的单位功耗。若考虑单位时间,例如单位时间为秒,那么无线接入频谱灵活光网络的能耗数值和功耗值一样。
实施例1:
参加图1至2本实施例提供一种无线接入频谱灵活光网络的能耗优化方法,包括:
步骤11、获取一组业务请求;
步骤12、基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;
步骤13、基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,以实现所述业务请求的传输;
其中,所述目标函数的表达式为:
式中,P
RRH:远端射频头的单位功耗;X
i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;T:表示单位时间;P
BBU:基带单元端口的单位功耗;Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1,否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;
所述目标函数的约束条件包括:
(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量,表达式如下:
(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量,表达式如下:
(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量,表达式如下:
(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量,表达式如下:
(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量,表达式如下:
(6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量,表达式如下:
可选地,所述基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口,包括:
在本地小区基站中,根据每一个业务需求流量需求,进行流量信息收集与汇聚;
将这些汇聚的所述流量信息被切分成不同的数据速率,且所述数据速率和每一个前端功能的远端射频头所承载的速率一一对应相同。
在该方案中,能够恰好匹配每一个前端功能的远端射频头,有利于减少本地小区基站中前端功能的远端射频头个数。
可选地,当RRH的业务流量通过光无线前传/回传网络时,利用光线路终端(OLT)的N×M光开关,业务流量通过把光信号转换成电信号,即O-E转换,然后再通过电开关对业务进行流量疏导,把电信号转换成光信号,这样由本地小区基站的业务流量在光线路终端中经过光电光(O-E-O),把业务流量接入到BBU端口中,最终流到频谱灵活光网络中。
可选地,一个基带单元端口和一个远端射频头连接,这样每一对基带单元端口和一个远端射频头通过通用公共无线电接口(CPRI)进 行无线数据与光的数据交换。由于流量业务在远端射频头和基带单元之间动态变化,需要在远端射频头进行数据汇聚,而在基带单元端口上需要进行业务流量的疏导。通过业务流量疏导方法,最大可能地减少网络中使用RRH和BBU端口的数目,使数据流量将通过基带单元端口传输到频谱灵活光网络上。
可选地,所述步骤13,包括:
获取所述目标函数的输入常量、变量索引、变量参数;
基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数;
其中,所述输入常量包括:
1)PRRH:远端射频头的单位功耗;
2)PBBU:基带单元端口的单位功耗;
3)RRHC
i,j:在第i区域里第j个RRH的容量;
4)BBUC
i,k:在第i区域里第k个BBU端口的容量;
5)Λ
s,d:从源节点s到目的节点d的业务流量大小;
6)(s,d):从源节点s到目的节点d的业务请求,其中s≠d;
7)CR:一组已知的业务请求;
8)A:一组基站区域集合;
9)AR:在一个基站中一组RRH集合;
10)B:在一个区域中一组BBU端口集合;
11)T:表示单位时间。
所述变量索引包括:
1)i:在基站中第i区域的索引编号;
2)j:第j个RRH的索引编号;
3)k:第k个BBU端口索引编号;
4)s和d:从源节点s到目的节点d的业务请求的索引编号。
所述变量参数包括:
1)X
i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;
2)Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1,否则为0;
实施例2:
本实施例提供一种无线接入频谱灵活光网络的能耗优化系统,包括:
业务请求获取模块,用于获取一组业务请求;
运算模块,用于基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;
传输模块,使用所述远端射频头数目和所述基带单元端口承载所述业务请求的流量需求;
其中,所述目标函数的表达式为:
式中,P
RRH:远端射频头的单位功耗;X
i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X
i,j为1,否则为0;T:表示单位时间;P
BBU:基带单元端口的单位功耗;Y
i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y
i,k为1, 否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;
所述目标函数的约束条件包括:(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量;(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量;(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量;(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量;(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量;(6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量。
可选地,所述运算模块包括:
数据输入单元,用于获取所述目标函数的输入常量、变量索引、变量参数;
基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数。
上述方案的系统可执行以上的方法,故其可减少远端射频头和基带单元端口的功耗。
可以理解的是,以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式,然而本发明并不局限于此。对于本领域内的普通技术人员而言,在不脱离本发明的精神和实质的情况下,可以做出各种变型和改进,这些变型和改进也视为本发明的保护范围。
Claims (5)
- 一种无线接入频谱灵活光网络的能耗优化方法,其特征在于,包括:获取一组业务请求;基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,以实现所述业务请求的传输;其中,所述目标函数的表达式为:式中,P RRH:远端射频头的单位功耗;X i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X i,j为1,否则为0;T:表示单位时间;P BBU:基带单元端口的单位功耗;Y i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y i,k为1,否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;所述目标函数的约束条件包括:(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量;(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量;(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量;(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量;(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量; (6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量。
- 根据权利要求1所述的无线接入频谱灵活光网络的能耗优化方法,其特征在于,所述基于业务流量疏导算法,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口,包括:在本地小区基站中,根据每一个业务需求流量需求,进行流量信息收集与汇聚;将这些汇聚的所述流量信息被切分成不同的数据速率,且所述数据速率和每一个前端功能的远端射频头所承载的速率一一对应相同。
- 根据权利要求1所述的无线接入频谱灵活光网络的能耗优化方法,其特征在于,所述基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,包括:获取所述目标函数的输入常量、变量索引、变量参数;基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数;其中,所述输入常量包括:1)PRRH:远端射频头的单位功耗;2)PBBU:基带单元端口的单位功耗;3)RRHC i,j:在第i区域里第j个RRH的容量;4)BBUC i,k:在第i区域里第k个BBU端口的容量;5)Λ s,d:从源节点s到目的节点d的业务流量大小;6)(s,d):从源节点s到目的节点d的业务请求,其中s≠d;7)CR:一组已知的业务请求;8)A:一组基站区域集合;9)AR:在一个基站中一组RRH集合;10)B:在一个区域中一组BBU端口集合;11)T:表示单位时间。所述变量索引包括:1)i:在基站中第i区域的索引编号;2)j:第j个RRH的索引编号;3)k:第k个BBU端口索引编号;4)s和d:从源节点s到目的节点d的业务请求的索引编号。所述变量参数包括:1)X i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X i,j为1,否则为0;2)Y i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y i,k为1,否则为0;
- 一种无线接入频谱灵活光网络的能耗优化系统,其特征在于,包括:业务请求获取模块,用于获取一组业务请求;运算模块,用于基于流量疏导能耗优化的目标函数的约束条件,求解所述目标函数,得到所述业务请求最小占用的远端射频头数目和最小占用的基带单元端口;传输模块,使用所述远端射频头数目和所述基带单元端口承载所述业务请求的流量需求;其中,所述目标函数的表达式为:式中,P RRH:远端射频头的单位功耗;X i,j:二进制变量,如果在第i个基站中的第j个RRH被占用,则X i,j为1,否则为0;T:表示单位时间;P BBU:基带单元端口的单位功耗;Y i,k:二进制变量,如果在第i个基站中的第j个BBU端口被占用,则Y i,k为1,否则为0;A:一组基站区域集合;i:在基站中第i区域的索引编号;j:第j个RRH的索引编号;k:第k个BBU端口索引编号;所述目标函数的约束条件包括:(1)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第j个RRH的容量;(2)保证所述业务请求需求的带宽流量小于或等于第i个基站中的第k个BBU端口的容量;(3)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的RRH提供的容量;(4)所述业务请求的带宽流量需求小于或等于在源节点区域(i=s)到目的节点区域(i=d)的BBU端口提供的容量;(5)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第j个基站上的RRH提供的容量;(6)在源节点s或目的节点d上,保证了每一个所述业务请求(s,d)的带宽流量需求小于或等于在第k个BBU端口所提供的容量。
- 根据权利要求4所述的无线接入频谱灵活光网络的能耗优化系统,其特征在于,所述运算模块包括:数据输入单元,用于获取所述目标函数的输入常量、变量索引、变量参数;基于所述输入常量、所述变量索引、所述变量参数求解所述目标函数。
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| US20210258802A1 (en) | 2021-08-19 |
| US11395160B2 (en) | 2022-07-19 |
| CN110234128A (zh) | 2019-09-13 |
| CN110234128B (zh) | 2020-10-20 |
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