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CN106162654B - A Frequency Allocation and Interference Coordination Method for Power LTE Networks Based on Service Isolation - Google Patents

A Frequency Allocation and Interference Coordination Method for Power LTE Networks Based on Service Isolation Download PDF

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CN106162654B
CN106162654B CN201610493466.9A CN201610493466A CN106162654B CN 106162654 B CN106162654 B CN 106162654B CN 201610493466 A CN201610493466 A CN 201610493466A CN 106162654 B CN106162654 B CN 106162654B
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frequency
base station
areas
edge
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CN106162654A (en
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姚继明
郭经红
李炳林
张�浩
卜宪德
缪巍巍
韦磊
田文锋
孙晓艳
喻强
沈文
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Global Energy Interconnection Research Institute
Nanjing Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Global Energy Interconnection Research Institute
Nanjing Power Supply Co of State Grid Jiangsu Electric Power Co Ltd
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/04Traffic adaptive resource partitioning
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W16/00Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/02Resource partitioning among network components, e.g. reuse partitioning
    • H04W16/10Dynamic resource partitioning

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Abstract

The invention provides a power LTE network frequency distribution and interference coordination method based on service isolation, which comprises the following steps: the base station measures the signal-to-noise ratio of a link and acquires service rate requirement information by using information transmitted by an uplink channel between the base station and the terminal; counting the total service rate requirements of different service areas, and calculating the service occupation ratio of the different service areas; the base station performs proportion distribution on the authorized frequency sets according to the business occupation ratios of different business areas and the authorized frequency sets owned by the base station, and forms a production control area frequency subset and a management information area frequency subset; exchanging frequency subset allocation information between the base stations, and further adjusting the frequency subsets; and the base station performs frequency allocation on the service terminals in the coverage range according to the adjusted frequency set. The invention realizes the service bearing isolation of different service areas, has higher safety, and is more reasonable and flexible in frequency distribution of edge users compared with a frequency soft multiplexing method.

Description

一种基于业务隔离的电力LTE网络频率分配及干扰协调方法A frequency allocation and interference coordination method for power LTE networks based on service isolation

技术领域technical field

本发明涉及电力系统通信技术领域,具体涉及一种基于业务隔离的电力LTE网络频率分配及干扰协调方法。The invention relates to the technical field of electric power system communication, in particular to a service isolation-based power LTE network frequency allocation and interference coordination method.

背景技术Background technique

电力系统的运检部门和营销部门分别使用不同的通信系统,一般仅注重并满足自身业务需求,形成多张独立的接入网并存的局面,网络建设重复,通信资源未能充分利用。而LTE网络是多业务承载的网络,可支持多种业务的同时传输,如果利用LTE网络实现运检业务和营销业务的合并传输,将有效降低网络投资、提高网络利用率,但是,根据电力系统的安全防护管理规定,配电通信网承载业务跨越生产控制大区和管理信息大区,通过“安全分区、网络专用、横向隔离、纵向认证”等方式保证不同安全大区业务的有效隔离,目前主要做法是单独建设网络,实现不同安全大区业务的物理隔离,但每个物理网络仅承载同一安全分区的业务网络资源,独占无法实现资源合理分配,造成网络资源的浪费和维护管理的不便。The transportation inspection department and marketing department of the power system use different communication systems, and generally only focus on and meet their own business needs, resulting in a situation where multiple independent access networks coexist, network construction is repeated, and communication resources are not fully utilized. The LTE network is a multi-service network that can support simultaneous transmission of multiple services. If the LTE network is used to realize the combined transmission of the inspection service and marketing service, it will effectively reduce network investment and improve network utilization. However, according to the power system According to the security protection management regulations of the State Council, the power distribution communication network carries services across the production control area and the management information area, and the effective isolation of services in different security areas is ensured through "safety partitions, network dedicated, horizontal isolation, and vertical authentication". The main method is to build a separate network to achieve physical isolation of services in different security zones. However, each physical network only carries the service network resources of the same security zone, and exclusive resources cannot be allocated rationally, resulting in waste of network resources and inconvenience in maintenance and management.

为满足大量无线通信设备的综合接入需求,公网运营商采用了无线接入网共享技术(RAN Sharing),该技术是指不同类别的终端用户接入同一无线网络,共享相同的无线频谱资源,无线部分采用RAN Sharing技术是电力LTE系统多业务承载的理想解决方案。现有的多业务承载方案中,在无线接入侧,采用固定频谱分配法与灵活频谱分配法相结合的方式实现不同安全大区的业务承载。具体来说,同一安全大区内的终端采用灵活频谱分配法,不同安全大区采用固定频谱分配法。但是这种方法忽略了电力业务的分布特性,在不同的区域或者不同时段,不同业务大区之间的业务占比是不相同的,而为不同安全大区采用固定频谱分配法是不合时宜的。In order to meet the comprehensive access requirements of a large number of wireless communication devices, public network operators have adopted the radio access network sharing technology (RAN Sharing), which means that different types of end users access the same wireless network and share the same wireless spectrum resources , the wireless part adopts RAN Sharing technology, which is an ideal solution for multi-service bearer in electric power LTE system. In the existing multi-service bearer solution, on the wireless access side, a fixed spectrum allocation method and a flexible spectrum allocation method are used to implement service bearer in different security areas. Specifically, terminals in the same security area adopt a flexible spectrum allocation method, and different security areas adopt a fixed spectrum allocation method. However, this method ignores the distribution characteristics of power services. In different regions or at different time periods, the proportion of services between different service areas is different, and it is inappropriate to use fixed spectrum allocation methods for different security areas.

目前有很多经典的干扰协调解决方案,如部分频率复用(FFR)、软频率复用(SFR)。FFR一经提出,对干扰起到了很好的抑制作用,其简单并容易操作,对子载波的使用限制严格,但是牺牲了频率分配的灵活性和频谱效率。这种方法主要是针对公网的蜂窝结构所提出的,电力业务分布具有自身特点,而且以链式组网较为常见,边缘用户的分布状态和公网的蜂窝结构也有所区别,直接将现有的频率分配及干扰协调方案应用在电力LTE系统中是不太合理和科学的。There are many classic interference coordination solutions, such as Fractional Frequency Reuse (FFR) and Soft Frequency Reuse (SFR). Once FFR is proposed, it plays a very good role in suppressing interference. It is simple and easy to operate, and has strict restrictions on the use of subcarriers, but it sacrifices the flexibility of frequency allocation and spectrum efficiency. This method is mainly proposed for the cellular structure of the public network. The distribution of power services has its own characteristics, and chain networking is more common. The distribution status of edge users is also different from the cellular structure of the public network. It is unreasonable and scientific to apply the frequency allocation and interference coordination scheme in the electric LTE system.

发明内容Contents of the invention

为克服上述现有技术的不足,本发明提供一种基于业务隔离的电力LTE网络频率分配及干扰协调方法,实现不同业务大区的业务承载隔离,该方法可以根据业务大区的业务需求的变化而动态调整频率子集,频率分配方式更为灵活,而且提高了频谱利用率。In order to overcome the above-mentioned deficiencies in the prior art, the present invention provides a service isolation-based power LTE network frequency allocation and interference coordination method to realize the isolation of service bearers in different service areas. However, by dynamically adjusting the frequency subset, the frequency allocation method is more flexible, and the spectrum utilization rate is improved.

实现上述目的所采用的解决方案为:The solution adopted to achieve the above purpose is:

一种基于业务隔离的电力LTE网络频率分配及干扰协调方法,所述频率分配及干扰协调方法包括:A service isolation-based power LTE network frequency allocation and interference coordination method, the frequency allocation and interference coordination method comprising:

(1)基站覆盖范围内的电力业务终端向基站发出接入请求,基站利用与终端之间的上行信道传递的信息,测量链路信噪比并获取业务速率需求信息;(1) The power service terminal within the coverage of the base station sends an access request to the base station, and the base station uses the information transmitted through the uplink channel between the base station and the terminal to measure the link signal-to-noise ratio and obtain service rate demand information;

(2)基站通过终端标识来识别属于不同业务大区的业务终端,统计不同业务大区的总业务速率需求,并计算不同业务大区的业务占比;(2) The base station identifies service terminals belonging to different service areas through the terminal identification, counts the total service rate requirements of different service areas, and calculates the business proportion of different service areas;

(3)基站根据不同业务大区的业务占比和基站拥有的授权频率集,按业务占比对授权频率集进行比例分配,形成生产控制大区频率子集和管理信息大区频率子集,两个子集之间没有频率交叉,不同业务大区内的业务终端使用不同频率通信;(3) The base station allocates the authorized frequency sets proportionally according to the business proportions of different business areas and the authorized frequency sets owned by the base station to form a frequency subset of the production control area and a frequency subset of the management information area. There is no frequency crossover between the two subsets, and service terminals in different service areas use different frequencies for communication;

(4)基站之间通过X2接口交互频率子集分配信息,双方根据边缘业务终端的使用情况,对频率子集进行进一步调整;(4) The base stations exchange frequency subset allocation information through the X2 interface, and both parties further adjust the frequency subset according to the usage of edge service terminals;

(5)基站根据调整后的频率集对覆盖范围内的业务终端进行频率分配。(5) The base station allocates frequencies to the service terminals within the coverage area according to the adjusted frequency set.

优选的,业务传输过程中频率子集不进行调整,有新的业务接入且影响相邻基站频率使用时,利用基站间的信息交互进行频率子集的调整。Preferably, the frequency subset is not adjusted during the service transmission process, and when a new service accesses and affects the frequency use of adjacent base stations, the frequency subset is adjusted by using information exchange between base stations.

优选的,生产控制大区业务分为实时性业务和非实时性业务;Preferably, the production control area business is divided into real-time business and non-real-time business;

单类业务传输时相应的频率子集所有资源都分配给其使用;When a single type of service is transmitted, all resources of the corresponding frequency subset are allocated to it;

两类业务同时传输时分配方法包括:a、首先为实时性业务分配独立的频率,剩余的授权频率集再根据不同业务大区的业务占比进行分配;The allocation method when two types of services are transmitted at the same time includes: a. First allocate independent frequencies for real-time services, and then allocate the remaining authorized frequency sets according to the proportion of services in different service areas;

b、频率子集划分不考虑实时性和非实时的业务需求,在已分配的生产控制大区的频率子集中,如果已分配频率资源大于业务需求,为业务分配独立的频率资源,如果分配频率资源小于业务需求,进行频率共享。b. The division of frequency subsets does not consider real-time and non-real-time business requirements. In the frequency subsets of the allocated production control area, if the allocated frequency resources are greater than the business needs, an independent frequency resource is allocated for the business. If the allocated frequency The resource is less than the service requirement, and the frequency is shared.

进一步的,所述频率共享包括:为生产控制大区内的不同业务的数据包标记不同的业务标识,为实时性业务标识为最高优先接入等级,可以随时使用频率资源,非实时性业务可以共享使用频率资源。Further, the frequency sharing includes: marking different service identifiers for data packets of different services in the production control area, marking the highest priority access level for real-time services, and frequency resources can be used at any time, and non-real-time services can be Shared use of frequency resources.

优选的,所述步骤(4)包括:如果基站1只有一种业务大区存在边缘用户,基站2的边缘用户频率分配包括:将基站1的边缘用户频率分配给基站2的中心用户使用或分配给基站2另一侧的边缘用户使用。Preferably, the step (4) includes: if the base station 1 has only one kind of service area with edge users, the edge user frequency allocation of the base station 2 includes: assigning the edge user frequency of the base station 1 to the central user of the base station 2 to use or allocate For edge users on the other side of base station 2.

优选的,所述步骤(4)包括:如果基站1的两种业务大区都存在边缘用户,基站2的边缘用户频率分配包括:Preferably, the step (4) includes: if there are edge users in both service areas of the base station 1, the frequency allocation of the edge users of the base station 2 includes:

1)基站1两个业务大区的边缘用户业务占比都少于20%,将基站1边缘用户使用的频率分配给基站2中频率子集大的中心用户使用;1) The proportion of edge user services in the two service areas of base station 1 is less than 20%, and the frequency used by the edge users of base station 1 is allocated to the central user with a large frequency subset in base station 2;

2)基站1生产控制大区边缘用户业务占比少于20%,管理信息大区边缘用户业务占比多于80%,将基站1边缘用户使用频率都分配给基站2中的生产控制大区的中心用户使用;2) The edge user services in the production control area of base station 1 account for less than 20%, and the edge user services in the management information area account for more than 80%. All the frequencies used by the edge users of base station 1 are allocated to the production control area in base station 2 The central users use;

3)基站1生产控制大区边缘用户业务占比多于80%,管理信息大区边缘用户业务占比少于20%,将基站1边缘用户使用频率都分配给基站2中的管理子集的中心用户使用。3) Base station 1 production control area edge user business accounted for more than 80%, management information area edge user business accounted for less than 20%, the use frequency of base station 1 edge user is allocated to the management subset in base station 2 Center users use.

进一步的,所述边缘用户是根据业务终端的地址位置和接收信号强度来确定的。Further, the edge user is determined according to the address location and received signal strength of the service terminal.

与最接近的现有技术相比,本发明提供的技术方案具有以下有益效果:Compared with the closest prior art, the technical solution provided by the present invention has the following beneficial effects:

本发明提出的技术方案中,频率分配是根据电力系统不同业务大区的安全管理需求来执行,基于不同业务大区的业务管理需求,将小区可用资源分配为生产控制大区频率子集和管理信息控制大区子集,实现不同业务大区的业务承载隔离,该方法可以根据业务大区的业务需求的变化而动态调整频率子集,频率分配方式更为灵活,而且提高了频谱利用率。In the technical solution proposed by the present invention, the frequency allocation is performed according to the safety management requirements of different business areas of the power system. The information controls the sub-sets of large areas to realize the isolation of service bearers in different service areas. This method can dynamically adjust the frequency subsets according to the changes in the business requirements of the service areas. The frequency allocation method is more flexible and the spectrum utilization rate is improved.

另外,本发明针对电力系统无线链式组网的场景,提出了面向链式组网的小区干扰协调方法,该方法是基于电力业务传输特征的方法,相对于频率软复用方法,边缘用户的频率分配更为合理和灵活。In addition, the present invention proposes a chained network-oriented cell interference coordination method for the scenario of a wireless chained network in a power system. This method is based on the characteristics of power service transmission. Compared with the frequency soft multiplexing method, the edge user Frequency allocation is more reasonable and flexible.

附图说明Description of drawings

图1是本发明提供的频率子集划分示意图;Fig. 1 is a schematic diagram of frequency subset division provided by the present invention;

图2是本发明提供的链式组网模型;Fig. 2 is the chain networking model provided by the present invention;

图3是本发明提供的干扰示意图。Fig. 3 is a schematic diagram of interference provided by the present invention.

具体实施方式detailed description

下面结合附图对本发明的具体实施方式做进一步的详细说明。The specific embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

为满足大量无线通信设备的综合接入需求,公网运营商采用了无线接入网共享技术(RAN Sharing),该技术是指不同类别的终端用户接入同一无线网络,共享相同的无线频谱资源,无线部分采用RAN Sharing技术是电力LTE系统多业务承载的理想解决方案。现有的业务承载方案中,在无线接入侧,采用固定频谱分配法与灵活频谱分配法相结合的方式实现不同安全大区的业务承载。同一安全大区内的终端采用灵活频谱分配法,不同安全大区采用固定频谱分配法。但是,因为电力设施分布的特殊性,不同电力应用场景的设施分布在不同的区域,比如,在生产控制大区业务覆盖的区域,可能不存在管理信息大区的业务需求,这种情况下,同一小区内的频谱资源可以全部给生产业务使用,而有些地区可能存在两者业务都有接入的需求,具体到不同的区域,不同大区之间的业务需求也是有所区别的,比如,有些地区生产控制大区的业务需求多,而有些地区管理信息大区的业务需求多,或者两个大区都有大量的业务接入需求,不同安全大区采用固定的频谱分配方式是不合时宜的,因此,需要一种动态的频谱分配方法来管理这些频谱资源,实现业务隔离的同时实现资源利用的最大化。In order to meet the comprehensive access requirements of a large number of wireless communication devices, public network operators have adopted the radio access network sharing technology (RAN Sharing), which means that different types of end users access the same wireless network and share the same wireless spectrum resources The use of RAN Sharing technology in the wireless part is an ideal solution for the multi-service bearer of the electric power LTE system. In the existing service bearer scheme, on the wireless access side, a fixed spectrum allocation method and a flexible spectrum allocation method are used to implement service bearer in different security areas. Terminals in the same security area adopt the flexible spectrum allocation method, and different security areas adopt the fixed spectrum allocation method. However, due to the special distribution of power facilities, facilities in different power application scenarios are distributed in different areas. For example, in the area covered by the business of the production control area, there may be no business requirements for the management information area. In this case, Spectrum resources in the same cell can all be used by production services, and some areas may have access requirements for both services. Specific to different areas, the service requirements of different large areas are also different, for example, In some areas, the production control area has more business needs, while in some areas the management information area has more business needs, or both areas have a large number of service access needs. It is inappropriate for different security areas to use fixed spectrum allocation. , therefore, a dynamic spectrum allocation method is needed to manage these spectrum resources, so as to achieve service isolation and maximize resource utilization.

具体的基于业务隔离的频率资源分配流程如下:The specific frequency resource allocation process based on service isolation is as follows:

1)基站覆盖范围内的电力业务终端向基站发出接入请求,基站利用与终端之间的上行信道传递的信息,测量链路信噪比并获取业务终端速率需求等信息;1) The power service terminal within the coverage of the base station sends an access request to the base station, and the base station uses the information transmitted through the uplink channel between the base station and the terminal to measure the link signal-to-noise ratio and obtain information such as the rate requirement of the service terminal;

2)基站通过终端标识来识别分别属于不同业务大区的业务终端,统计不同业务大区的总业务速率需求,并计算不同业务大区的业务占比;2) The base station identifies service terminals belonging to different service areas through terminal identifiers, counts the total service rate requirements of different service areas, and calculates the business proportion of different service areas;

3)基站根据不同业务大区的业务占比和基站拥有的授权频率集,按业务占比对授权频率集进行比例分配,形成生产控制大区频率子集(生产频率子集)和管理信息大区频率子集(管理频率子集),两个子集之间没有频率交叉,不同业务大区内的业务终端使用不同频率通信,实现无线空口侧的业务物理隔离和频率资源动态分配;3) According to the business proportion of different business areas and the authorized frequency set owned by the base station, the base station allocates the authorized frequency set according to the business proportion, forming a frequency subset of the production control area (production frequency subset) and a large number of management information. Regional frequency subsets (management frequency subsets), there is no frequency crossover between the two subsets, and service terminals in different service areas use different frequencies for communication, realizing physical isolation of services and dynamic allocation of frequency resources on the wireless air interface side;

4)基站之间通过X2接口交互频率子集分配信息,双方根据边缘业务终端的使用情况,对频率子集进行进一步调整;4) The base stations exchange frequency subset allocation information through the X2 interface, and both parties further adjust the frequency subset according to the usage of edge service terminals;

5)基站根据调整后的频率集对覆盖范围内的业务终端进行频率分配。5) The base station allocates frequencies to the service terminals within the coverage area according to the adjusted frequency set.

因为考虑到电力无线接入不同于公网接入,虽然频率子集是动态变化的,但为了降低信令开销,同时符合电力的周期接入需求,业务传输过程中频率子集不进行调整,有新的业务接入且影响相邻小区频率使用时,利用基站间的信息交互进行频率子集的调整。Considering that electric power wireless access is different from public network access, although the frequency subset is dynamically changed, in order to reduce signaling overhead and meet the periodic access requirements of electric power, the frequency subset is not adjusted during service transmission. When there is a new service access and affects the frequency usage of adjacent cells, the frequency subset is adjusted by using the information exchange between base stations.

因为不同业务具有不同的QoS需求,一般来说,生产控制大区的业务要求高于管理信息大区的要求,对于生产控制大区业务来说,还细分为实时性业务和非实时性业务。根据业务终端的接入需求,存在两种接入场景,包括两类不同大区业务同时传输和只有一种业务传输的场景,业务需求为同一类需求时,相应的频率子集所有资源都分配给其使用;两类业务同时传输时,有2种分配方法,第一种,首先为实时性业务分配独立的频率,剩余的授权频率集再根据上述步骤3中的方法根据不同业务大区的业务占比进行分配,第二种,频率子集划分先不考虑实时性和非实时的业务需求,在已分配的生产控制大区的频率子集中,进行分配使用,如果已分配频率资源大于业务需求,为业务分配独立的频率资源,如果分配频率资源小于业务需求,需要进行频率共享。具体来说,为生产控制区内的不同业务的数据包标记不同的业务标识,为实时性业务标识为最高优先接入等级,可以随时使用频率资源,非实时可以共享使用资源。Because different services have different QoS requirements, generally speaking, the business requirements of the production control area are higher than those of the management information area. For the business of the production control area, it is also subdivided into real-time services and non-real-time services. . According to the access requirements of service terminals, there are two access scenarios, including the simultaneous transmission of two types of services in different regions and the scenario of only one service transmission. When the service requirements are of the same type, all resources of the corresponding frequency subset are allocated. For its use; when two types of services are transmitted at the same time, there are two allocation methods. The first one is to allocate independent frequencies for real-time services first, and then use the remaining authorized frequency sets according to the method in the above step 3 according to different service areas. The proportion of business is allocated. In the second type, real-time and non-real-time business requirements are not considered in the division of frequency subsets. The frequency subsets in the allocated production control area are allocated and used. If the allocated frequency resources are greater than the business According to the requirements, independent frequency resources are allocated for the business. If the allocated frequency resources are less than the business needs, frequency sharing is required. Specifically, different business identifiers are marked for different business data packets in the production control area, and the highest priority access level is marked for real-time business. Frequency resources can be used at any time, and non-real-time resources can be shared.

步骤3中,虽然为不同业务大区分配了独立的频率子集,但考虑到小区间干扰的存在,需要为相邻小区的相邻边缘用户分配不同的频率,以免产生干扰,因此,对不同的业务大区的业务终端进行划分,分别为边缘用户和中心用户,并根据业务占比,对频率子集中的频率进行细分。边缘用户是根据业务终端的地址位置和接收信号强度来确定的。In step 3, although independent frequency subsets are allocated for different service areas, considering the existence of inter-cell interference, it is necessary to allocate different frequencies for adjacent edge users in adjacent cells to avoid interference. Therefore, for different The service terminals in the service area are divided into edge users and central users, and the frequencies in the frequency subset are subdivided according to the proportion of services. The edge user is determined according to the address location and received signal strength of the service terminal.

先对业务大区划分子集,然后子集里面再进行细分,如图1所示,这样的好处是,如果先定中心和边缘子集,就不能保证生产业务就一定选择好的频段,而先划分业务频率子集就可以优先选择好的频段。其次,划分边缘子集后,邻小区的边缘就不能使用该子集内的频段,但对于电力业务来说,以周期业务居多,所以,可能在一段时期内就没有边缘用户,这样就可以提高频谱利用率。First divide the business area into subsets, and then subdivide the subsets, as shown in Figure 1. The advantage of this is that if you first determine the center and edge subsets, you cannot guarantee that the production business must choose a good frequency band. A good frequency band can be preferentially selected by dividing the service frequency subset first. Secondly, after the edge subset is divided, the edge of adjacent cells cannot use the frequency band in this subset, but for power services, most of them are periodic services, so there may be no edge users for a period of time, which can improve Spectrum utilization.

步骤4中,基站信息交互时,首先要判断组网架构,这将直接影响边缘用户的频率分配情况,考虑到电力系统中链式组网的场景较多,蜂窝式覆盖场景较少,本发明主要考虑链式组网条件下的小区干扰协调,对于蜂窝式的小区干扰协调可使用公网的干扰协调方法。如图2所示的链式组网模型,三个小区交叉的地方存在干扰,需要为不同的边缘用户分配不同频率,以免产生干扰。In step 4, when base station information is exchanged, the networking architecture must first be judged, which will directly affect the frequency allocation of edge users. Mainly consider the cell interference coordination under the condition of the chain network, and the interference coordination method of the public network can be used for the cellular cell interference coordination. In the chain networking model shown in Figure 2, there is interference where three cells intersect, and different frequencies need to be allocated to different edge users to avoid interference.

以图3中的小区1(参考小区)为例,因为呈链式组网分布,不需考虑整个边缘区域的干扰,只需考虑相邻小区的可能干扰边缘,这样的好处是,边缘用户占用的频率资源少,可供中心用户使用的就多。其中,干扰区的定义是两个基站覆盖范围交叉的区域,图中假设基站是规则的圆形覆盖。Taking cell 1 (reference cell) in Figure 3 as an example, because it is distributed in a chain network, it is not necessary to consider the interference of the entire edge area, but only the possible interference edge of adjacent cells. The advantage of this is that edge users occupy There are fewer frequency resources, and there are more available for central users. Wherein, the definition of the interference area is the area where the coverage areas of two base stations intersect. In the figure, it is assumed that the base stations are covered by a regular circle.

为减少不同业务大区使用的频段交叉,频段分配时采用连续分配,同时,考虑到生产业务的重要性,先进行生产大区的分配,再进行管理大区的分配,可以优先选择质量好的频段。In order to reduce the crossover of frequency bands used by different business areas, continuous allocation is adopted for frequency band allocation. At the same time, considering the importance of production business, the production area is allocated first, and then the management area is allocated. Good quality can be given priority. band.

如图3所示,小区2存在业务传输需求,与小区1通过X2接口进行信息交互,小区1告知小区2的边缘用户使用频率信息,如果小区1与小区2相邻的干扰区没有边缘用户,小区2可以自由分配频段(暂不考虑小区2的右侧边缘),如果小区1与小区2相邻的干扰区内存在边缘用户,又分两种情况,小区2的边缘没有业务需求,不需考虑小区1边缘用户分配情况,因为小区2的业务终端不在干扰范围内。如果小区2的干扰区内有边缘用户传输需求,扣除相邻小区1已分配的进行分配,详细如下。As shown in Figure 3, cell 2 has a service transmission requirement and exchanges information with cell 1 through the X2 interface. Cell 1 informs the edge users in cell 2 of the frequency information. If there are no edge users in the interference area adjacent to cell 1 and cell 2, Cell 2 can freely allocate frequency bands (the right edge of cell 2 is not considered for now). If there are edge users in the interference area adjacent to cell 1 and cell 2, there are two cases. There is no service demand at the edge of cell 2, and no Consider the allocation of users at the edge of cell 1, because the service terminals of cell 2 are not within the interference range. If there is an edge user transmission demand in the interference area of cell 2, the allocation is deducted from the allocation of adjacent cell 1, as detailed below.

如果小区1的边缘只有一种大区内的业务,比如生产或管理业务的一种,小区2的边缘分配有2种方法:第一种,将小区1的边缘用户频率分配给小区2的中心用户使用,第二种,分配给另一侧的边缘使用。If the edge of cell 1 has only one kind of business in the large area, such as a kind of production or management business, there are two ways to allocate the edge of cell 2: the first method is to allocate the edge user frequency of cell 1 to the center of cell 2 The user uses the second, which is assigned to the edge use on the other side.

如果小区1的两种业务大区都存在边缘用户,根据前文分配方法,两个子集都是根据生产控制大区业务和管理信息大区业务的业务占比来进行分配,所以两个子集的大小不同。If there are edge users in the two business areas of cell 1, according to the above allocation method, the two subsets are allocated according to the business proportion of the production control area business and the management information area business, so the size of the two subsets different.

接着,对小区1内的业务大区内的中心、边缘业务占比分别进行统计,有4种情况:Then, statistics are made on the proportions of central and edge services in the large business area of community 1. There are four situations:

1)小区1两个业务大区的边缘用户业务占比都少于20%,将小区1边缘用户使用的频率分配给小区2中频率子集大的中心用户使用;1) The service ratio of edge users in the two service areas of cell 1 is less than 20%, and the frequency used by the edge users of cell 1 is allocated to the central user with a large frequency subset in cell 2;

2)小区1生产控制大区边缘用户业务占比少于20%,管理信息大区边缘用户业务占比多于80%,将小区1边缘用户使用频率都分配给小区2中的生产控制大区的中心用户使用;2) The edge user business in the production control area of cell 1 accounts for less than 20%, and the edge user business in the management information area accounts for more than 80%. All the frequencies used by the edge users in cell 1 are allocated to the production control area in cell 2 The central users use;

3)小区1生产控制大区边缘用户业务占比多于80%,管理信息大区边缘用户业务占比少于20%,将小区1边缘用户使用频率都分配给小区2中的管理子集的中心用户使用。3) The business of edge users in the production control area of cell 1 accounts for more than 80%, and the business of users at the edge of the management information area accounts for less than 20%. Center users use.

4)两个业务大区的边缘业务占比多于80%。这种情况比较少见,说明建站初期基站的远端单元部署位置不合理,没有考虑到边缘用户的并发量,应该将密集业务部署在远端单元的中心位置。而且,如果边缘业务占用频段较多,就会造成相邻小区的边缘用户可用的频率资源非常少,导致接入失败,因此,本发明不考虑此种情况。4) The marginal business of the two business regions accounted for more than 80%. This kind of situation is relatively rare, indicating that the deployment position of the remote unit of the base station is unreasonable in the early stage of station construction, and the concurrent amount of edge users is not considered. Intensive services should be deployed in the center of the remote unit. Moreover, if edge services occupy more frequency bands, the frequency resources available to edge users in adjacent cells will be very small, resulting in access failure. Therefore, the present invention does not consider this situation.

最后应当说明的是:以上实施例仅用于说明本申请的技术方案而非对其保护范围的限制,尽管参照上述实施例对本申请进行了详细的说明,所属领域的普通技术人员应当理解;本领域技术人员阅读本申请后依然可对申请的具体实施方式进行种种变更、修改或者等同替换,但这些变更、修改或者等同替换,均在申请待批的权利要求保护范围之内。Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application rather than to limit its protection scope. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand; After reading this application, those skilled in the art can still make various changes, modifications or equivalent replacements to the specific implementation methods of the application, but these changes, modifications or equivalent replacements are all within the protection scope of the pending claims of the application.

Claims (7)

1. A power LTE network frequency allocation and interference coordination method based on service isolation is characterized by comprising the following steps:
(1) A power service terminal in the coverage range of a base station sends an access request to the base station, and the base station measures the signal-to-noise ratio of a link and acquires service rate requirement information by using information transmitted by an uplink channel between the base station and the terminal;
(2) The base station identifies the service terminals of different service areas through the terminal identification, counts the total service rate requirements of the different service areas, and calculates the service occupation ratios of the different service areas;
(3) The base station performs proportional allocation on the authorized frequency set according to the service occupation ratio to form a production control large-area frequency subset and a management information large-area frequency subset, frequency cross does not exist between the two subsets, and service terminals in different service large areas use different frequencies for communication;
(4) Interacting frequency subset distribution information between base stations through an X2 interface, and further adjusting the frequency subsets by the two sides according to the service condition of the edge service terminal;
(5) And the base station performs frequency allocation on the service terminals in the coverage range according to the adjusted frequency set.
2. The method of claim 1, wherein the frequency subsets are not adjusted during service transmission, and when a new service is accessed and affects the frequency usage of an adjacent base station, the frequency subsets are adjusted by using information interaction between base stations.
3. The method of claim 1, wherein the traffic of the production control area comprises real-time traffic and non-real-time traffic;
all resources of the corresponding frequency subsets are allocated to be used during the transmission of the single-class service;
the distribution method when the two types of services are transmitted simultaneously comprises the following steps: a. after independent frequencies are distributed to the real-time service, the rest authorized frequency sets are distributed according to the service occupation ratio of different service areas;
b. and in the frequency subset division, the real-time service requirement and the non-real-time service requirement are not considered, if the allocated frequency resource is greater than the service requirement, an independent frequency resource is allocated to the service in the allocated frequency subset of the production control area, and if the allocated frequency resource is less than the service requirement, frequency sharing is carried out.
4. The method of claim 3, wherein the frequency sharing comprises: different service identifiers are marked for data packets of different services in a production control area, the real-time service is identified as the highest priority access level, the frequency resources can be used at any time, and the non-real-time services can share the frequency resources.
5. The method for frequency allocation and interference coordination according to claim 1, wherein said step (4) comprises: if one of the base stations has only one service area with edge users, the edge user frequency allocation of the other base station comprises the following steps: and allocating the edge user frequency of the base station to be used by a central user of the other base station or to be used by an edge user on the other side of the other base station.
6. The method of claim 1, wherein the step (4) comprises: if edge users exist in both service areas of one base station, the frequency allocation of the edge users of the other base station comprises the following steps:
1) The edge user service proportion of two service large areas of the base station is less than 20 percent, and the frequency used by the edge user of the base station is distributed to the central user with large frequency subset in the other base station;
2) The percentage of the edge user service of the production control large area of the base station is less than 20 percent, the percentage of the edge user service of the management information large area is more than 80 percent, and the use frequency of the edge user of the base station is distributed to the central user of the production control large area in the other base station;
3) The production control large area edge user service proportion of the base station is more than 80%, the management information large area edge user service proportion is less than 20%, and the use frequency of the edge user of the base station is distributed to the central user of the management subset in the other base station.
7. The method of claim 6 wherein the edge users are determined based on the location of the service terminal's address and received signal strength.
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