CN104053163A - Heterogeneous wireless network networking method based on calculation and processing - Google Patents
Heterogeneous wireless network networking method based on calculation and processing Download PDFInfo
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Abstract
A heterogeneous wireless network networking method based on calculation and processing integrates features of a heterogeneous network and features of a cloud wireless access network, and a large-scale cooperative processing and multi-antenna technology is utilized for fully obtaining large-scale cooperative processing and calculation communication gains, reducing operating expenses, improving the network transmission frequency spectrum performance and reducing energy consumption. According to the heterogeneous wireless network networking method, a remote radio frequency unit is not directly connected with a fixed baseband processing unit, but the baseband processing unit and a wireless resource management unit of the remote radio frequency unit are both moved to a large-scale centralized processing server and are connected through a high-speed optical fiber. A traditional macro base station is upgraded to be a heterogeneous multi-antenna super base station to be in cooperative communication with the large-scale centralized processing server. The heterogeneous wireless network networking method based on calculation and processing is flexible in deployment and high in upgrading speed, the cost of constructing and maintaining the wireless access network by operators is lowered, and human intervention in network management is reduced.
Description
Technical field
The present invention relates to a kind of network-building method of Radio Network System, exactly, relate to a kind of network-building method of the heterogeneous wireless network based on computing, belong to the technical field of heterogeneous wireless network.
Background technology
In recent years, mobile subscriber is exponential type growth for the demand of many application (as: wireless high-definition video, social networks and point-to-point instant messaging etc.) of high data rate.Future wireless network will provide the user of a kind of similar asymmetric user data line ADSL (Asymmetric Digital Subscriber Line) technology to experience.The average area capacity that this means mobile communication system will reach 25Gbps/km2, even higher; This spectrum efficiency that is equivalent to existing mobile communication system need to improve 100 times.Meanwhile, the power consumption of network will further reduce, and to the year two thousand twenty, expection energy service efficiency EE (Energy Efficiency) need to promote 1000 times.Yet, existing cellular radio framework has been used and had surpassed for 40 years, initial its purpose of design is in order to increase coverage and to guarantee seamless coverage, but not for improving system energy efficiency, so can not be adapted to well the demand of future mobile communications development.This just requires following mobile communication system need to carry out the architecture design of novel radio network, adopts advanced signal to process and networking technology.
Referring to Fig. 1, heterogeneous network HetNets (Heterogeneous Networks) is a kind of network design mode being subject to from the extensive attention of academia and industrial circle.Low power nodes LPNs (Low Power Nodes) technology wherein, such as: femto base station (Pico Base Station), Home eNodeB (Femto Base Stations) and small-cell base station (Small Cell Base Stations) etc. are all the various key technologies of hoist capacity in high density, high traffic demand network.In traffic hotspots area, use remote radio unit (RRU) can shorten the distance between network and user, effectively increase the coverage of macro base station MBS (Macro Base Station), improve data rate, and improve marginal user performance.Meanwhile, adopt such deployment way can also effectively save network overhead, reduce energy consumption and reduce carrier network lower deployment cost.
Remote radio unit (RRU) adopts base band and radio frequency isolation technics, can effectively solve that feeder line is various, difficulty of construction large and many problems such as site resource acquisition difficulty, is also a kind of common equipment type during network size is disposed.But, on the other hand, use in a large number remote radio unit (RRU) also can cause the interference problem between each remote radio unit (RRU) or each community more serious and complicated, and traditional interference coordination technique is no longer fully effective.For example, under heterogeneous network, the performance gain of multipoint cooperative CoMP (Coordinated Multi-Point) technology will reduce gradually along with the increase of remote radio unit (RRU) deployment density, cannot represent its advantage in 4G network.
In addition, exist when comprising traditional heterogeneous nodes such as access point (Heterogeneous Processing Nodes) of cellular cell macro base station and broadband access network and remote radio unit (RRU), make mobile subscriber face the selection problem of access network.Although remote radio unit (RRU) can provide higher transmission rate, but because its coverage is less, mobile subscriber may frequently be switched between low power nodes, cause higher handover failure rate, affect service quality QoS (Quality of Service).Although macro base station can provide covering in a big way, also there is the shortcoming that finite capacity and data rate are lower.
In sum, how to develop a kind of novel networking mode, to overcome the performance decline of the heterogeneous network that the problems referred to above are caused, reduce energy consumption, realize dynamic optimization and the management of network performance, give play to the due great potential of heterogeneous network, become the focus that scientific research personnel pays close attention in the industry.
Summary of the invention
In view of this, the network-building method that the object of this invention is to provide a kind of heterogeneous wireless network based on computing.The method has merged the feature of heterogeneous network and cloud wireless access network C-RAN (Cloud Radio Access Network), by extensive collaborative process and multi-antenna technology, and concentrate on a large scale signal processing mode to promote the ability of traditional macro base station, again by means of the advantage of extensive centralized calculation technology, can fully obtain extensive collaborative process gain, realize operational overhead optimization, improve network performance and reduce energy consumption.
In order to achieve the above object, the invention provides a kind of network-building method of the heterogeneous wireless network based on computing, it is characterized in that: described the method comprises following operating procedure:
Step 1, according to the network planning, first to traditional base station upgrading or reset be equipped with extensive many antennas enhancement mode isomery macro base station, be the super base stations of the many antennas of isomery, for realizing the backward compatible of existing system and guaranteeing the seamless coverage of network; The super base station of the many antennas of this isomery has complete physical layer, data link layer and Network layer function, and has the fusion function of heterogeneous radio access networks, and is provided with dynamic real-time interface between extensive centralized calculation server;
Step 2, or region that coverage large large in traffic carrying capacity, arranges or sets up a plurality of remote radio unit (RRU)s and absorb for realizing the capacity of hot spot region; And this remote radio unit (RRU) only retains front end less radio-frequency RF signal and simple symbol processing capacity, and the control function of remaining baseband signal physical treatment and RRM all concentrates in the baseband processing unit pond in extensive centralized calculation server;
Step 3, user terminal access phase: if user's translational speed is greater than predetermined threshold, in high-speed moving state, or need to support speech business time, access enhancement mode isomery macro base station; Otherwise, the wireless signal strength that user terminal detects by assessment, and the transmitting power of different access nodes and the performance limitations of loading condition and user terminal transport service feature and back haul link that obtain, according to high energy efficiency access scheme judgement access enhancement mode isomery macro base station or remote radio unit (RRU);
Step 4, after accessing user terminal to network, extensive centralized calculation server is periodically according to far-end radio frequency unit business amount, and packet loss, throughput and three transmission quality performance index of network transfer delay end to end, adjusts remote radio unit (RRU) transmitting power; Then, extensive centralized calculation server is dispatched user according to statistical channel state information CSI (Channel State Information), the instantaneous QSI of queue state information (Queue State Information) and user mobility; And be user resource allocation according to instantaneous channel condition information;
Step 5, the telex network stage: for the mutual interference of remote radio unit (RRU) in heterogeneous wireless network, by carrying out precoding at extensive centralized calculation server place, when transmitting, eliminate and disturb, in the reception stage, carry out serial interference elimination simultaneously, thereby realize large-scale interference synergic, process; For the interference between the super base station of the many antennas of isomery, by extensive MIMO, carry out spatial domain interference coordination processing; For the interference between remote radio unit (RRU) and the super base station of the many antennas of isomery, the resource coordination by between extensive centralized calculation server and the super base station of the many antennas of isomery, carries out interference coordination.
Compared with prior art, innovation key technology and the beneficial effect of the inventive method are: in the methods of the invention, remote radio unit (RRU) is no longer directly connected with single fixing baseband processing unit, but the baseband processing unit of remote radio unit (RRU) and radio resource managing unit are all moved to and focus on a large scale server, and interconnect by high speed fibre.Can make full use of so existing public municipal resource, dispose flexibly, upgrade fast, reduce operator to the construction of wireless access network and maintenance cost.Utilize the virtual antenna array that the remote radio unit (RRU) of common transmission forms to carry out extensive multipoint cooperative, can be under the condition of Radio Resource outside occupying volume not, avoid producing in network the interference problem in minizone and community.
Moreover, the enhancement mode isomery macro base station that participates in cooperation can utilize extensive multi-antenna cooperative to process (Large-Scale Cooperative Multiple Antenna Processing) technology, can existing traditional structure macro base station not carried out under large change prerequisite, improve power system capacity, strengthen the complexity that covers and reduce antenna configuration; Also without the remote radio unit (RRU) in some overlay area configuration enormous amount.And, utilize enhancement mode isomery macro base station to carry out extensive multi-antenna cooperative treatment technology, widened the served distance of macro base station to user, reduced the density of movable remote radio unit (RRU), therefore, the enhancement mode isomery macro base station with extensive multi-antenna cooperative treatment technology has also reduced the interference between adjacent distal end radio frequency unit and this macro base station, and this macro base station carries out extensive multi-antenna cooperative processing simultaneously back haul link load and time delay can reduce.
In addition, the extensive cooperation RRM in the present invention (Large-Scale Cooperative Radio Resource Management) mechanism can be carried out and optimize and revise on a large scale Radio Resource according to Real-time Channel state information and queue state information.Utilize random line learning technology to replace heuritic approach, can estimate at channel condition information, when burst service arrives state or other key parameters are inaccurate, guarantee the robustness of extensive cooperation RRM scheduling scheme, on the other hand, adopt after time scale separation, the RRM of extensive cooperation can reduce the complexity of signaling consumption and calculating.
Finally, the inventive method to the change of the existing network architecture and network element seldom, extensive MANET (the Large-scale Self-Organizing Network) mechanism of utilization based on centralized extensive centralized calculation technology, the operation that network operation is safeguarded be can further simplify, the human intervention reducing in network management, the object that reduces operator's maintenance costs reached.By extensive MANET, not only can reduce the complexity of management co-channel interference, save the maintenance costs of all remote radio unit (RRU)s and macro base station, can also provide powerful optimisation strategy by coordinating the mode of whole network management, to improve the energy service efficiency performance of system.
Accompanying drawing explanation
Fig. 1 is that the structure of existing heterogeneous wireless network forms schematic diagram.
Fig. 2 is the heterogeneous wireless network-building method operating procedure flow chart that the present invention is based on computing.
Fig. 3 is the schematic diagram that the present invention is based on the heterogeneous wireless network-building method embodiment of computing.
Fig. 4 is the efficiency of power dissipation contrast schematic diagram of the inventive method embodiment and traditional IT.
Fig. 5 is the power system capacity contrast schematic diagram of the inventive method embodiment and traditional IT.
Embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, the present invention is described in further detail.
Introducing before the inventive method, the following four kinds of network nodes that first the method related to are briefly described:
Be equipped with the enhancement mode isomery macro base station of extensive many antennas (Massive MIMO), for guaranteeing the seamless coverage of network, and connect extensive centralized calculation server by light back haul link, transmit the data message for cooperation transmission base band signal process, promote the total spectrum efficiency in community and the spectrum efficiency of edge customer.
A plurality of remote radio unit (RRU)s that form distributed multi-antenna (Distributed MIMO), for realizing the wireless signal transmitting-receiving of wireless access end, strengthen the covering of data hot zones, reduce user's switching times, promote the service quality of Cell Edge User; Each remote radio unit (RRU) directly utilizes light back haul link to connect extensive centralized calculation server.
The baseband processing unit pond being formed by the baseband processing unit of a plurality of virtualization architecture, each baseband processing unit is wherein provided with the following four kinds of modules that arrange according to processing Resource Properties: physical layer process module, media access control MAC (Media Access Control) layer processing module, control and administration module and accelerator module; The resource requirement that process according to above-mentioned four class resources in this baseband processing unit pond, dispatches and forms a virtual base station resource; That distributed remote radio unit (RRU) is collected is up, descending channel information and user data, and with the mutual various functions of the virtual base station interface that carries these information, all adopt and download and upgrade correlation module and realize, do not need HardwareUpgring; And when this virtual base station load changes, system independently adjustresources is distributed, and dynamically obtains required respective wireless resource.
The multi-zone supervision server in the baseband processing unit pond of configuration virtual framework, for focusing on the data message of heterogeneous radio access networks road wireless access end, resource is distributed and to be carried out centralized management, and allocation of network resources in global scope, significantly improves the utilance of resource.
Referring to Fig. 2, introduce the concrete operation step of the network-building method of heterogeneous wireless network of the present invention:
Step 1, according to the network planning, first to traditional base station upgrading or reset be equipped with extensive many antennas enhancement mode isomery macro base station, be the super base stations of the many antennas of isomery, for realizing the backward compatible of existing system and guaranteeing the seamless coverage of network; The super base station of the many antennas of this isomery has complete physical layer, data link layer and Network layer function, and has the fusion function of heterogeneous radio access networks, and is provided with dynamic real-time interface between extensive centralized calculation server.This step comprises following content of operation:
In need to disposing the four corner of heterogeneous radio access networks network, according to traffic carrying capacity and the coverage thereof in the network planning and each region, upgraded or reset enhancement mode isomery macro base station in traditional base station, this enhancement mode isomery macro base station utilizes radio-frequency (RF) transmitter and base band processing device finishing service data and the control information processing capacity himself configuring, and business datum and/or control signal are provided;
For promoting efficiency of transmission, each enhancement mode isomery macro base station is equipped with extensive antenna, and configures corresponding frequency spectrum resource and basic parameter, to provide the basic covering of business for Radio Access Network; The communication node that the adaptive wave beam shaping of extensive antenna is directly accessed by user terminal completes corresponding operating; Enhancement mode isomery macro base station interconnects by dynamic real-time interface and extensive centralized calculation server, and by extensive centralized calculation server complete and remote radio unit (RRU) between live collaboration resource management.
Step 2, or region that coverage large large in traffic carrying capacity, arranges or sets up a plurality of remote radio unit (RRU)s and absorb for realizing the capacity of hot spot region; And this remote radio unit (RRU) only retains front end less radio-frequency RF signal and simple symbol processing capacity, and the control function of remaining baseband signal physical treatment and RRM all concentrates in the baseband processing unit pond in extensive centralized calculation server.This step comprises following content of operation:
Large or access intensive region in traffic carrying capacity, preset or set up a plurality of remote radio unit (RRU)s, remote radio unit (RRU) in this region directly accesses extensive centralized calculation server by optical fiber, so that any single baseband processing unit breaks down or when wrong, can not affect systemic-function, improve the high reliability of system works.
Baseband processing unit pond in extensive centralized calculation server be responsible for carrying out between each remote radio unit (RRU) and user terminal, comprise synchronize, the signaling control function of all wireless communication resources that access, channel foundation, transfer of data and channel discharge, remote radio unit (RRU) only provides transmission channel and the forwarding capability of business datum for user, do not carry out the processing operation of business and control information.
Extensive centralized calculation server also adopts centralized virtual precoding, user's scheduling and power control techniques, makes a plurality of remote radio unit (RRU)s form the node cluster of extensive cooperative multipoint transmission, realizes joint transmission, improves efficiency of transmission.
Step 3, user terminal access phase: if user's translational speed is greater than predetermined threshold, in high-speed moving state, or need to support speech business time, access enhancement mode isomery macro base station; Otherwise, the wireless signal strength that user terminal detects by assessment, and the transmitting power of different access nodes and the performance limitations of loading condition and user terminal transport service feature and back haul link that obtain, according to high energy efficiency access scheme judgement access enhancement mode isomery macro base station or remote radio unit (RRU).
Step 4, after accessing user terminal to network, extensive centralized calculation server is periodically according to far-end radio frequency unit business amount, and packet loss, throughput and three transmission quality performance index of network transfer delay end to end, adjusts remote radio unit (RRU) transmitting power; Then, extensive centralized calculation server is dispatched user according to statistical channel state information CSI (Channel State Information), the instantaneous QSI of queue state information (Queue State Information) and user mobility; And be user resource allocation according to instantaneous channel condition information.This step comprises following concrete operations content:
Extensive centralized calculation server is the traffic carrying capacity of remote radio unit (RRU) and the performance of heterogeneous radio access networks network in monitoring network periodically:
If the total traffic of this remote radio unit (RRU) is positioned at default threshold range; And comprise packet loss, throughput and end to end network transfer delay when totally three transmission quality performance index parameters are all within the scope of its predetermined threshold, remain stationary constant; Or
The total traffic of this remote radio unit (RRU) surpasses predetermined threshold value continuously, or because of the real-time processing capacity of heterogeneous radio access networks network limited, any one performance parameter in its three transmission quality performance index parameters is reduced to while being less than its predetermined threshold, decision-making system is in heavy traffic state, this remote radio unit (RRU) improves transmitting power, and near the remote radio unit (RRU) of not opening starting; User terminal accesses best enhancement mode isomery macro base station or remote radio unit (RRU) according to energy efficiency indexes, carries out the scheduling of large-scale wireless resource simultaneously: by from heavy traffic remote radio unit (RRU) or baseband signal through route, be dispensed to the baseband processing unit of appointment in resource pool and process; Under extreme case, heavy traffic remote radio unit (RRU) is even used the Radio Resource of adjacent distal end radio frequency unit.Or
The total traffic of this remote radio unit (RRU) is less than predetermined threshold value continuously, and three transmission quality performance index of heterogeneous radio access networks network are during all higher than its predetermined threshold, decision-making system is in low traffic state, this remote radio unit (RRU) just reduces transmitting power, or user is switched to after near node according to energy efficiency indexes, close this remote radio unit (RRU).
Step 5, the telex network stage: for the mutual interference of remote radio unit (RRU) in heterogeneous wireless network, by carrying out precoding at extensive centralized calculation server place, when transmitting, eliminate and disturb, in the reception stage, carry out serial interference elimination simultaneously, thereby realize large-scale interference synergic, process; For the interference between the super base station of the many antennas of isomery, by extensive MIMO, carry out spatial domain interference coordination processing; For the interference between remote radio unit (RRU) and the super base station of the many antennas of isomery, the resource coordination by between extensive centralized calculation server and the super base station of the many antennas of isomery, carries out interference coordination.This step comprises following concrete operations content:
(51) when remote radio unit (RRU) and user terminal carry out downlink communication, by extensive centralized calculation server, carry out virtual precoding computing, build interference channel kernel, remote radio unit (RRU) carries out signal transmitting according to virtual precoding vectors, to eliminate descending interference; When remote radio unit (RRU) and user terminal carry out uplink communication, extensive centralized calculation server is carried out serial interference elimination, to recover each user's upward signal; Thereby realizing large-scale interference synergic processes.
(52) for enhancement mode isomery macro base station, be the interference between the super base station of the many antennas of isomery, enhancement mode isomery macro base station is by the spatial feature Information generation interference coordination instruction of the interference obtaining; Then, by indicating itself and adjacent enhancement mode isomery macro base station to carry out scheduling of resource with the interface of other enhancement mode isomery macro base stations; The serving BS of user terminal carries out joint transmission according to the resource after coordinating and interference and this enhancement mode isomery macro base station, and interference signal is converted into useful signal, thereby realize extensive MIMO spatial domain interference coordination, processes.
(53) for the interference of remote radio unit (RRU) and enhancement mode isomery macro base station, enhancement mode isomery macro base station and extensive centralized calculation server carry out real-time dynamic interaction by interface each other to the interfere information in same asset and performance index by statistics, and running time-frequency resource is coordinated, thereby realize the up-downgoing interference coordination between super base station and remote radio unit (RRU).
The present invention has carried out a large amount of emulation and has implemented test (Figure 3 shows that the schematic diagram of heterogeneous wireless network-building method embodiment of the present invention), and the result that test is implemented in emulation is successfully, has realized goal of the invention.
In order to embody intuitively the superiority of the inventive method, the result of the test of emulation embodiment of the present invention and traditional IT performance are contrasted.Below in conjunction with Fig. 4 and Fig. 5 brief description it:
Referring to Fig. 4, introduce the inventive method different from the contrast of traditional IT in energy efficiency performance.
Fig. 4 shows, the present invention is better than traditional IT in energy efficiency performance.4 curves from bottom to top represent it with curve 1～4 respectively, and wherein, curve 1 representative only has the energy consumption of macro base station scene, and all resources are all distributed by macro base station, and all the other 3 curves represent that the inventive method is in the energy consumption of different situations.Wherein, curve 2 represents the frequency resource quadrature of remote radio unit (RRU) and macro base station, and curve 3 represents remote radio unit (RRU) and macro base station channeling, and curve 4 represents part resource quadrature, the part resource multiplex of remote radio unit (RRU) and macro base station.As can be seen from Figure 3, the performance efficiency of three kinds of different situations of the present invention is better than conventional method all the time.And along with the increase of maximum transmission power, the performance advantage of the inventive method is more obvious.
Referring to Fig. 5, introduce the inventive method and the traditional IT contrast situation in power system capacity.
Fig. 4 shows, the power system capacity performance of the inventive method is also better than traditional network-building method.And power system capacity performance can increase and increase along with participating in the remote radio unit (RRU) node of cooperation, and is better than conventional method all the time.Moreover along with the increase of transmitting power, the performance advantage of the inventive method is more obvious.
Claims (6)
1. a network-building method for the heterogeneous wireless network based on computing, is characterized in that: described the method comprises following operating procedure:
Step 1, according to the network planning, first to traditional base station upgrading or reset be equipped with extensive many antennas enhancement mode isomery macro base station, be the super base stations of the many antennas of isomery, for realizing the backward compatible of existing system and guaranteeing the seamless coverage of network; The super base station of the many antennas of this isomery has complete physical layer, data link layer and Network layer function, and has the fusion function of heterogeneous radio access networks, and is provided with dynamic real-time interface between extensive centralized calculation server;
Step 2, or region that coverage large large in traffic carrying capacity, arranges or sets up a plurality of remote radio unit (RRU)s and absorb for realizing the capacity of hot spot region; And this remote radio unit (RRU) only retains front end less radio-frequency RF signal and simple symbol processing capacity, and the control function of remaining baseband signal physical treatment and RRM all concentrates in the baseband processing unit pond in extensive centralized calculation server;
Step 3, user terminal access phase: if user's translational speed is greater than predetermined threshold, in high-speed moving state, or need to support speech business time, access enhancement mode isomery macro base station; Otherwise, the wireless signal strength that user terminal detects by assessment, and the transmitting power of different access nodes and the performance limitations of loading condition and user terminal transport service feature and back haul link that obtain, according to high energy efficiency access scheme judgement access enhancement mode isomery macro base station or remote radio unit (RRU);
Step 4, after accessing user terminal to network, extensive centralized calculation server is periodically according to far-end radio frequency unit business amount, and packet loss, throughput and three transmission quality performance index of network transfer delay end to end, adjusts remote radio unit (RRU) transmitting power; Then, extensive centralized calculation server is dispatched user according to statistical channel state information CSI (Channel State Information), the instantaneous QSI of queue state information (Queue State Information) and user mobility; And be user resource allocation according to instantaneous channel condition information;
Step 5, the telex network stage: for the mutual interference of remote radio unit (RRU) in heterogeneous wireless network, by carrying out precoding at extensive centralized calculation server place, when transmitting, eliminate and disturb, in the reception stage, carry out serial interference elimination simultaneously, thereby realize large-scale interference synergic, process; For the interference between the super base station of the many antennas of isomery, by extensive MIMO, carry out spatial domain interference coordination processing; For the interference between remote radio unit (RRU) and the super base station of the many antennas of isomery, the resource coordination by between extensive centralized calculation server and the super base station of the many antennas of isomery, carries out interference coordination.
2. method according to claim 1, is characterized in that: described method relates to following network node:
Be equipped with the enhancement mode isomery macro base station of extensive many antennas (Massive MIMO), for guaranteeing the seamless coverage of network, and connect extensive centralized calculation server by light back haul link, transmit the data message for cooperation transmission base band signal process, promote the total spectrum efficiency in community and the spectrum efficiency of edge customer;
A plurality of remote radio unit (RRU)s that form distributed multi-antenna (Distributed MIMO), for realizing the wireless signal transmitting-receiving of wireless access end, strengthen the covering of data hot zones, reduce user's switching times, promote the service quality of Cell Edge User; Each remote radio unit (RRU) directly utilizes light back haul link to connect extensive centralized calculation server;
The baseband processing unit pond being formed by the baseband processing unit of a plurality of virtualization architecture, each baseband processing unit is wherein provided with the following four kinds of modules that arrange according to processing Resource Properties: physical layer process module, media access control MAC (Media Access Control) layer processing module, control and administration module and accelerator module; The resource requirement that process according to above-mentioned four class resources in this baseband processing unit pond, dispatches and forms a virtual base station resource; That distributed remote radio unit (RRU) is collected is up, descending channel information and user data, and with the mutual various functions of the virtual base station interface that carries these information, all adopt and download and upgrade correlation module and realize, do not need HardwareUpgring; And when this virtual base station load changes, system independently adjustresources is distributed, and dynamically obtains required respective wireless resource;
The multi-zone supervision server in the baseband processing unit pond of configuration virtual framework, for focusing on the data message of heterogeneous radio access networks road wireless access end, resource is distributed and to be carried out centralized management, and allocation of network resources in global scope, significantly improves the utilance of resource.
3. method according to claim 1, is characterized in that, described step 1 comprises following content of operation:
In need to disposing the four corner of heterogeneous radio access networks network, according to traffic carrying capacity and the coverage thereof in the network planning and each region, upgraded or reset enhancement mode isomery macro base station in traditional base station, this enhancement mode isomery macro base station utilizes radio-frequency (RF) transmitter and base band processing device finishing service data and the control information processing capacity himself configuring, and business datum and/or control signal are provided;
For promoting efficiency of transmission, each enhancement mode isomery macro base station is equipped with extensive antenna, and configures corresponding frequency spectrum resource and basic parameter, to provide the basic covering of business for Radio Access Network; The communication node that the adaptive wave beam shaping of extensive antenna is directly accessed by user terminal completes corresponding operating; Enhancement mode isomery macro base station interconnects by dynamic real-time interface and extensive centralized calculation server, and by extensive centralized calculation server complete and remote radio unit (RRU) between live collaboration resource management.
4. method according to claim 1, is characterized in that: described step 2 comprises following content of operation:
Large or access intensive region in traffic carrying capacity, preset or set up a plurality of remote radio unit (RRU)s, remote radio unit (RRU) in this region directly accesses extensive centralized calculation server by optical fiber, so that any single baseband processing unit breaks down or when wrong, can not affect systemic-function, improve the high reliability of system works;
Baseband processing unit pond in extensive centralized calculation server be responsible for carrying out between each remote radio unit (RRU) and user terminal, comprise synchronize, the signaling control function of all wireless communication resources that access, channel foundation, transfer of data and channel discharge, remote radio unit (RRU) only provides transmission channel and the forwarding capability of business datum for user, do not carry out the processing operation of business and control information;
Extensive centralized calculation server also adopts centralized virtual precoding, user's scheduling and power control techniques, makes a plurality of remote radio unit (RRU)s form the node cluster of extensive cooperative multipoint transmission, realizes joint transmission, improves efficiency of transmission.
5. method according to claim 1, is characterized in that: described step 4 comprises following content of operation:
Extensive centralized calculation server is the traffic carrying capacity of remote radio unit (RRU) and the performance of heterogeneous radio access networks network in monitoring network periodically:
If the total traffic of this remote radio unit (RRU) is positioned at default threshold range; And comprise packet loss, throughput and end to end network transfer delay when totally three transmission quality performance index parameters are all within the scope of its predetermined threshold, remain stationary constant; Or
The total traffic of this remote radio unit (RRU) surpasses predetermined threshold value continuously, or because of the real-time processing capacity of heterogeneous radio access networks network limited, any one performance parameter in its three transmission quality performance index parameters is reduced to while being less than its predetermined threshold, decision-making system is in heavy traffic state, this remote radio unit (RRU) improves transmitting power, and near the remote radio unit (RRU) of not opening starting; User terminal accesses best enhancement mode isomery macro base station or remote radio unit (RRU) according to energy efficiency indexes, carries out the scheduling of large-scale wireless resource simultaneously: by from heavy traffic remote radio unit (RRU) or baseband signal through route, be dispensed to the baseband processing unit of appointment in resource pool and process; Under extreme case, heavy traffic remote radio unit (RRU) is even used the Radio Resource of adjacent distal end radio frequency unit; Or
The total traffic of this remote radio unit (RRU) is less than predetermined threshold value continuously, and three transmission quality performance index of heterogeneous radio access networks network are during all higher than its predetermined threshold, decision-making system is in low traffic state, this remote radio unit (RRU) just reduces transmitting power, or user is switched to after near node according to energy efficiency indexes, close this remote radio unit (RRU).
6. method according to claim 1, is characterized in that: described step 5 comprises following content of operation:
(51) when remote radio unit (RRU) and user terminal carry out downlink communication, by extensive centralized calculation server, carry out virtual precoding computing, build interference channel kernel, remote radio unit (RRU) carries out signal transmitting according to virtual precoding vectors, to eliminate descending interference; When remote radio unit (RRU) and user terminal carry out uplink communication, extensive centralized calculation server is carried out serial interference elimination, to recover each user's upward signal; Thereby realizing large-scale interference synergic processes;
(52) for enhancement mode isomery macro base station, be the interference between the super base station of the many antennas of isomery, enhancement mode isomery macro base station is by the spatial feature Information generation interference coordination instruction of the interference obtaining; Then, by indicating itself and adjacent enhancement mode isomery macro base station to carry out scheduling of resource with the interface of other enhancement mode isomery macro base stations; The serving BS of user terminal carries out joint transmission according to the resource after coordinating and interference and this enhancement mode isomery macro base station, and interference signal is converted into useful signal, thereby realize extensive MIMO spatial domain interference coordination, processes;
(53) for the interference of remote radio unit (RRU) and enhancement mode isomery macro base station, enhancement mode isomery macro base station and extensive centralized calculation server carry out real-time dynamic interaction by interface each other to the interfere information in same asset and performance index by statistics, and running time-frequency resource is coordinated, thereby realize the up-downgoing interference coordination between super base station and remote radio unit (RRU).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410287510.1A CN104053163B (en) | 2014-06-24 | 2014-06-24 | A kind of network-building method based on the heterogeneous wireless network for calculating processing |
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